2015年9月30日星期三

Industrial machinery, application of hand

Industrial machinery, application of hand
 Manipulator in the mechanization and automation of the production process developed a new type of device.,cnc milling machine  In recent years, as electronic technology, especially computer extensive use of robot development and production of
high-tech fields has become a rapidly developed a new technology, which further promoted the development of robot, allowing robot to better achieved with the combination of mechanization and automation.
 Although the robot is not as flexible as staff, but it has to the continuous duplication of work and labor, I do not know fatigue, not afraid of danger, the power snatch weight characteristics when compared with manual large, therefore, mechanical hand has been of great importance to many sectors, and increasingly has been applied widely, for example: 
 (1) Machining the workpiece loading and unloading, especially in the automatic lathe, combination machine tool use is more common.  
(2) In the assembly operations are widely used in the electronics industry, it can be used to assemble printed circuit boards, in the machinery industry It can be used to assemble parts and components.  
(3) The working conditions may be poor, monotonous, repetitive easy to sub-fatigue working environment to replace human labor. 
 (4) May be in dangerous situations, such as military goods handling, dangerous goods and hazardous materials removal and so on. 
(5) Universe and ocean development. 
 (6), military engineering and biomedical research and testing.   Help mechanical hands: also known as the balancer, balance suspended, labor-saving spreader, manual Transfer machine is a kind of weightlessness of manual load system, a novel, time-saving technology for material handling operations booster equipment, belonging to kinds of non-standard design of series products. Customer application needs, creating customized cases. Manual operation of a simulation of the automatic machinery, it can be a fixed program draws handling objects or perform household tools to accomplish certain specific actions.
 Application of robot can replace the people engaged in monotonous repetitive or heavy manual labor, the mechanization and automation of production, instead of people in hazardous environments manual operation, improving working conditions and ensure personal safety.
The late 20th century, 40, the United States atomic energy experiments, the first use of radioactive material handling robot, human robot in a safe room to manipulate various operations and experimentation. 50 years later, manipulator and gradually extended to industrial production sector, for the temperatures, polluted areas, cnc milling machine and loading and unloading to take place the work piece material, but also as an auxiliary device in automatic machine tools, machine tools, automatic production lines and processing center applications, the completion of the upper and lower material, or From the library take place knife knife and so on according to fixed procedures for the replacement operation. Robot body mainly by the hand and sports institutions. Agencies with the use of hands and operation of objects of different occasions, often there are clamping support and adsorption type of care. Movement organs are generally hydraulic pneumatic electrical device drivers.
Manipulator can be achieved independently retractable rotation and lifting movements, generally 2 to 3 degrees of freedom. Robots are widely used in metallurgical industry, machinery manufacture, light industry and atomic energy sectors.  Can mimic some of the staff and arm motor function, a fixed procedure for the capture, handling objects or operating tools, automatic operation device. It can replace human labor in order to achieve the production of heavy mechanization and automation that can operate in hazardous environments to protect the personal safety, which is widely used in machinery manufacturing, metallurgy, electronics, light industry and nuclear power sectors. Mechanical hand tools or other equipment commonly used for additional devices, such as the automatic machines or automatic production line handling and transmission of the workpiece, the replacement of cutting tools in machining centers, etc. generally do not have a separate control device. Some operating devices require direct manipulation by humans; such as the atomic energy sector performs household hazardous materials used in the master-slave manipulator is also often referred to as mechanical hand.
Manipulator mainly by hand and sports institutions. Task of hand is holding the workpiece (or tool) components, according to grasping objects by shape, size, weight, material and operational requirements of a variety of structural forms, such as clamp type, type and adsorption-based care such as holding. Sports organizations, so that the completion of a variety of hand rotation (swing), mobile or compound movements to achieve the required action, to change the location of objects by grasping and posture. Robot is the automated production of a kind used in the process of crawling and moving piece features automatic device, which is mechanized and automated production process developed a new type of device. In recent years, as electronic technology, especially computer extensive use of robot development and production of high-tech fields has become a rapidly developed a new technology, which further promoted the development of robot, allowing robot to better achieved with the combination of mechanization and automation. Robot can replace humans completed the risk of duplication of boring work, to reduce human labor intensity and improve labor productivity. Manipulator has been applied more and more widely, in the machinery industry, it can be used for parts assembly, work piece handling, loading and unloading, particularly in the automation of CNC machine tools, modular machine tools more commonly used.
 At present, the robot has developed into a FMS flexible manufacturing systems and flexible manufacturing cell in an important component of the FMC. The machine tool equipment and machinery in hand together constitute a flexible manufacturing system or a flexible manufacturing cell, it was adapted to small and medium volume production, you can save a huge amount of the work piece conveyor device, compact, and adaptable.cnc milling machine  When the work piece changes, flexible production system is very easy to change will help enterprises to continuously update the marketable variety, improve product quality, and better adapt to market competition.
At present, China's industrial robot technology and its engineering application level and comparable to foreign countries there is a certain

distance, application and industrialization of the size of the low level of robot research and development of a direct impact on raising the level of automation in China, from the economy, technical considerations are very necessary. Therefore, the study of mechanical hand design is very meaningful.
 cnc milling machine

2015年9月27日星期日

Renoho Precision Machinery Technology Co.,Ltd: Mechanical hand classification and characteristics...

Renoho Precision Machinery Technology Co.,Ltd: Mechanical hand classification and characteristics...: Mechanical hand classification and characteristics    Robots are generally divided into three categories: the first is the general machin...

Mechanical hand classification and characteristics

Mechanical hand classification and characteristics 
  Robots are generally divided into three categories: the first is the general machinery does not require manual hand. It is an independent not affiliated with a particular host device. Cnc machining It can be programmed according to the needs of the task to complete the operation of the provisions. It is characterized with ordinary mechanical performance, also has general machinery, memory, intelligence ternary machinery.
 The second category is the need to manually do it, called the operation of aircraft. It originated in the atom, military industry, first through the operation of machines to complete a particular job, and Cnc machining  later developed to operate using radio signals to carry out detecting machines such as the Moon. Used in industrial manipulator also fall into this category. The third category is dedicated manipulator, the main subsidiary of the automatic machines or automatic lines, to solve the machine up and down the workpiece material and delivery.

  This mechanical hand in foreign countries known as the "Mechanical Hand", which is the host of services, from the host-driven; Cnc machining exception of a few outside the working procedures are generally fixed, and therefore special. Main features:  First, mechanical hand (the upper and lower material robot, assembly robot, handling robot, stacking robot, help robot, vacuum handling machines, vacuum suction crane, labor-saving spreader, pneumatic balancer, etc.). Second, cantilever cranes (cantilever crane, electric chain hoist crane, air balance the hanging, etc.)  Third, rail-type transport system (hanging rail, light rail, single girder cranes, double-beam crane).

 Cnc machining

2015年9月23日星期三

The composition, mechanical hand

The composition, mechanical hand 
 Robot in the form of a variety of forms, Cnc machining some relatively simple, some more complicated, but the basic form is the same as the composition of the , Usually by the implementing agencies, transmission systems, control systems and auxiliary devices composed.
 1. Implementing agencies 
Manipulator executing agency by the hands, wrists, arms, pillars. Hands are crawling institutions, is used to clamp and release the workpiece, and similar to human fingers, to complete the staffing of similar actions. Wrist and fingers and the arm connecting the components can be up and down, left, Cnc machining  and rotary movement. A simple mechanical hand can not wrist. Pillars used to support the arm can also be made mobile as needed.
 2. Transmission 
The actuator to be achieved by the transmission system. Sub-transmission system commonly used manipulator mechanical transmission, hydraulic transmission, pneumatic and electric power transmission and other drive several forms
 3. Control System

 Manipulator control system's main role is to control the robot according to certain procedures, direction, position, speed of action, a simple mechanical hand is generally not set up a dedicated control system, using only trip switches, relays, control valves and circuits can be achieved dynamic drive system control, so that implementing agencies according to the requirements of action.Cnc machining   Action will have to use complex programmable robot controller, the micro-computer control.

Cnc machining

2015年9月20日星期日

Renoho Precision Machinery Technology Co.,Ltd: Manipulator

Renoho Precision Machinery Technology Co.,Ltd: Manipulator: Manipulator      Robot developed in recent decades as high-tech automated production  equipment. Industrial robot is an important branch ...

Manipulator

Manipulator  
   Robot developed in recent decades as high-tech automated production  equipment. Industrial robot is an important branch of industrial robots. It features can be programmed to perform tasks in a variety of expectations, Cnc machining in both structure and performance advantages of their own people and machines, in particular, reflects the people's intelligence and adaptability. The accuracy of robot operations and a variety of environments the ability to complete the work in the field of national economy and there are broad prospects for development. With the development of industrial automation, there has been CNC machining center, it is in reducing labor intensity, while greatly improved labor productivity. However, the upper and lower common in CNC machining processes material, usually still use manual or traditional relay-controlled semi-automatic device. The former time-consuming and labor intensive, inefficient; the latter due to design complexity, require more relays, wiring complexity, vulnerability to body vibration interference, while the existence of poor reliability, fault more maintenance problems and other issues. Programmable Logic Controller PLC-controlled robot control system for materials up and down movement is simple, circuit design is reasonable, with a strong anti-jamming capability, Cnc machining ensuring the system's reliability, reduced maintenance rate, and improve work efficiency. Robot technology related to mechanics, mechanics, electrical hydraulic technology, automatic control technology, sensor technology and computer technology and other fields of science, is a cross-disciplinary integrated technology.
 First, an overview of industrial manipulator
  Robot is a kind of positioning control can be automated and can be re-programmed to change in multi-functional machine, which has multiple degrees of freedom can be used to carry an object in order to complete the work in different environments. Low wages in industry, although still a labor-intensive, mechanical hand use has become increasingly popular. Electronics and automotive industries that Europe and the United States multinational companies very early in their factories in China, the introduction of automated production. But now the changes are those found in industrial-intensive South China, East China's coastal areas, local plastic processing plants have also emerged in mechanical watches began to become increasingly interested in, because they have to face a high turnover rate of workers, as well as for the workers to pay work-related injuries fee challenges.China, plastic products .
 With the rapid development of China's industrial production, especially the reform and opening up after the rapid increase in the degree of automation to achieve the workpiece handling, steering, transmission or operation of brazing, spray gun, wrenches and other tools for processing and assembly operations since, which has more and more attracted our attention. Robot is to imitate the manual part of the action, according to a given program, track and requirements for automatic capture, handling or operation of the automatic mechanical devices.
 In real life, you will find this a problem. In the machine shop, the processing of parts loading time is not annoying, and labor productivity is not high, the cost of production major, and sometimes man-made incidents will occur, resulting in processing were injured. Think about what could replace it with the processing time of a tour as long as there are a few people, and can operate 24 hours saturated human right? The answer is yes, but the robot can come to replace it
 Production of mechanical hand can increase the automation level of production and labor productivity; can reduce labor intensity, ensuring product quality, to achieve safe production; particularly in the high-temperature, high pressure, low temperature, low pressure, dust, explosive, toxic and radioactive gases such as poor environment can replace the normal working people. Here I would like to think of designing a robot
 to be used in actual production.
  Why would a robot designed to provide a pneumatic power: pneumatic robot refers to the compressed air as power source-driven robot.
 With pressure-driven and other energy-driven comparison have the following advantages:  1. Air inexhaustible, used later discharged into the atmosphere, does not require recycling and disposal, do not pollute the environment. (Concept of environmental protection)
2. Air stick is small, the pipeline pressure loss is small (typically less than asphalt
 path pressure drop of one-thousandth), to facilitate long-distance transport.
3. Compressed air of the working pressure is low (usually 4 to 8 kg / per square centimeter), and therefore moving the material components and manufacturing accuracy requirements can be lowered.
4. With the hydraulic transmission, compared to its faster action and reaction, which is one of the advantages pneumatic outstanding.
5. The air cleaner media, it will not degenerate, not easy to plug the pipeline.
But there are also places where it fly in the ointment:
 1. As the compressibility of air, resulting in poor aerodynamic stability of the work, resulting in the implementing agencies as the precision of the velocity and not easily controlled.
 2. As the use of low atmospheric pressure, the output power can not be too large; in order to increase the output power is bound to the structure of the entire pneumatic system size increased.
  With pneumatic drive and compare with other energy sources drive has the following advantages:  Air inexhaustible, used later discharged into the atmosphere, without recycling and disposal, do not pollute the environment. Accidental or a small amount of leakage would not be a serious impact on production.  Viscosity of air is small, the pipeline pressure loss also is very small, easy long-distance transport.
 The lower working pressure of compressed air, pneumatic components and therefore the material and manufacturing accuracy requirements can be lowered. In general, reciprocating thrust in 1 to 2 tons pneumatic economy is better.

  Compared with the hydraulic transmission, and its faster action and reaction, which is one of the outstanding merits of pneumatic.  Clean air medium, it will not degenerate, not easy to plug the pipeline. It can be safely used in flammable, explosive and the dust big occasions. Cnc machining Also easy to realize automatic overload protection.

 Cnc machining

2015年9月16日星期三

Renoho Precision Machinery Technology Co.,Ltd: Avoiding failures

Renoho Precision Machinery Technology Co.,Ltd: Avoiding failures: Avoiding failures  The best way to handle bearing failures is to avoid them .  Nonrepetitive runout(NRR)occurs during rotation as a r...

Avoiding failures

Avoiding failures 

The best way to handle bearing failures is to avoid them
 Nonrepetitive runout(NRR)occurs during rotation as a random eccentricity between the inner and outer racesmuch like a cam action
NRR can be caused by retainer tolerance or eccentricities of the raceways and ballsUnlike repetitive runout,Cnc machining  no compensation can be made for NRR.
  NRR is reflected in the cost of the bearingIt is common in the industry to provide different bearing types and grades for specific applicationsFor examplea bearing with an NRR of less than 0.3um is used when minimal runout is neededsuch as in diskdrive spindle motorsSimilarlymachinetool spindles tolerate only minimal deflections to maintain precision cutsConsequently, bearings are manufactured with low NRR just for machine-tool applications
 Contamination is unavoidable in many industrial productsand shields and seals are commonly used to protect bearings from dust and dirtHowevera perfect bearing seal is not possible because of the movement between inner and outer racesConsequentlylubrication migration and contamination are always problems
  Once a bearing is contaminated, its lubricant deteriorates and operation becomes noisierIf it overheatsthe bearing can seizeAt the very leastcontamination causes wear as it works between balls and the racewayCnc machining becoming imbedded in the races and acting as an abrasive between metal surfacesFending off dirt with seals and shields illustrates some methods for controlling contamination
  Noise is as an indicator of bearing qualityVarious noise grades have been developed to classify bearing performance capabilities
  Noise analysis is done with an Anderonmeter, which is used for quality control in bearing production and also when failed bearings are returned for analysis. A transducer is attached to the outer ring and the inner race is turned at 1,800rpm on an air spindle. Noise is measured in andirons, which represent ball displacement in μm/rad.     
 With experience, inspectors can identify the smallest flaw from their sound. Dust, for example, makes an irregular crackling. Ball scratches make a consistent popping and are the most difficult to identify. Inner-race damage is normally a constant high-pitched noise, while a damaged outer race makes an intermittent sound as it rotates
   Bearing defects are further identified by their frequencies. Generally, defects are separated into low, medium, and high wavelengths. Defects are also referenced to the number of irregularities per revolution.
  Low-band noise is the effect of long-wavelength irregularities that occur about 1.6 to 10 times per revolution. These are caused by a variety of inconsistencies, such as pockets in the race. Detectable pockets are manufacturing flaws and result when the race is mounted too tightly in multiplejaw chucks.
  Medium-hand noise is characterized by irregularities that occur 10 to 60 times per revolution. It is caused by vibration in the grinding operation that produces balls and raceways. High-hand irregularities occur at 60 to 300 times per revolution and indicate closely spaced chatter marks or widely spaced, rough irregularities.

  Classifying bearings by their noise characteristics allows users to specify a noise grade in addition to the ABEC standards used by most manufacturers. ABEC defines physical tolerances such as bore,Cnc machining  outer diameter, and runout. As the ABEC class number increase (from 3 to 9), tolerances are tightened. ABEC class, however, does not specify other bearing characteristics such as raceway quality, finish, or noise. Hence, a noise classification helps improve on the industry standard.

 Cnc machining

2015年9月13日星期日

EXTENDING BEARING LIFE

EXTENDING BEARING LIFE 
 AbstractNature works hard to destroy bearings, but their chances of survival can be improved by following a few simple guidelines. Extreme neglect in a bearing leads to overheating and possibly seizure or, at worst, 
CnC machining  an explosion. But even a failed bearing leaves clues as to what went wrong. After a little detective work, action can be taken to avoid a repeat performance.
 Keywords: bearings   failures   life  
  Bearings fail for a number of reasonsbut the most common are misapplicationcontaminationimproper lubricantshipping or handling damageand misalignment. The problem is often not difficult to diagnose because a failed bearing usually leaves telltale signs about what went wrong
  Howeverwhile a postmortem yields good informationit is better to avoid the process altogether by specifying the bearing correctly in The first placeTo do thisit is useful to review the manufacturers sizing guidelines and operating characteristics for the selected bearing. 
 Equally critical is a study of requirements for noise, torque, and runout, as well as possible exposure to contaminants, CnC machining hostile liquids, and temperature extremes. This can provide further clues as to whether a bearing is right for a job.
  Why bearings fail 
  About 40% of ball bearing failures are caused by contamination from dust, dirt, shavings, and corrosion. Contamination also causes torque and noise problems, and is often the result of improper handling or the application environmentFortunately, a bearing failure caused by environment or handling contamination is preventableand a simple visual examination can easily identify the cause 
 Conducting a postmortem il1ustrates what to look for on a failed or failing bearingThenunderstanding the mechanism behind the failure, such as brinelling or fatigue, helps eliminate the source of the problem.
  Brinelling is one type of bearing failure easily avoided by proper handing and assembly. It is characterized by indentations in the bearing raceway caused by shock loadingsuch as when a bearing is dropped-or incorrect assembly. Brinelling usually occurs when loads exceed the material yield point(350,000 psi in SAE 52100 chrome steel)It may also be caused by improper assembly, Which places a load across the racesRaceway dents also produce noisevibrationand increased torque.
  A similar defect is a pattern of elliptical dents caused by balls vibrating between raceways while the bearing is not turningThis problem is called false brinelling. It occurs on equipment in transit or that vibrates when not in operation. In addition, debris created by false brinelling acts like an abrasive, further contaminating the bearing. Unlike brinelling, false binelling is often indicated by a reddish color from fretting corrosion in the lubricant.
  False brinelling is prevented by eliminating vibration sources and keeping the bearing well lubricated. Isolation pads on the equipment or a separate foundation may be required to reduce environmental vibration. Also a light preload on the bearing helps keep the balls and raceway in tight contact. Preloading also helps prevent false brinelling during transit. 
 Seizures can be caused by a lack of internal clearance, improper lubrication, or excessive loading. Before seizing, excessive, friction and heat softens the bearing steel. Overheated bearings often change colorusually to blue-black or straw coloredFriction also causes stress in the retainerwhich can break and hasten bearing failure 
   Premature material fatigue is caused by a high load or excessive preloadWhen these conditions are unavoidablebearing life should be carefully calculated so that a maintenance scheme can be worked out
   Another solution for fighting premature fatigue is changing materialWhen standard bearing materialssuch as 440C or SAE 52100do not guarantee sufficient
  lifespecialty materials can be recommended. In additionwhen the problem is traced back to excessive loadinga higher capacity bearing or different configuration may be used
  Creep is less common than premature fatigueIn bearingsit is caused by excessive clearance between bore and shaft that allows the bore to rotate on the shaftCreep can be expensive because it causes damage to other components in addition to the bearing
  0ther more likely creep indicators are scratchesscuff marksor discoloration to shaft and boreTo prevent creep damagethe bearing housing and shaft fittings should be visually checked
   Misalignment is related to creep in that it is mounting relatedIf races are misaligned or cockedThe balls track in a noncircumferencial pathThe problem is incorrect mounting or tolerancingor insufficient squareness of the bearing mounting siteMisalignment of more than 1/4·can cause an early failure
  Contaminated lubricant is often more difficult to detect than misalignment or creepContamination shows as premature wearSolid contaminants become an abrasive in the lubricantIn additioninsufficient lubrication between ball and retainer wears and weakens the retainerIn this situationlubrication is critical if the retainer is a fully machined typeRibbon or crown retainersin contrastallow lubricants to more easily reach all surfaces 

  Rust is a form of moisture contamination and often indicates the wrong material for the applicationCnC machining If the material checks out for the jobthe easiest way to prevent rust is to keep bearings in their packaginguntil just before installation. 
  
 CnC machining


2015年9月10日星期四

Renoho Precision Machinery Technology Co.,Ltd: veral examples

Renoho Precision Machinery Technology Co.,Ltd: veral examples: veral examples   1st, transforms the X53 milling machine with SIEMENS 810M    In 1998, the company invested 200,000 Yuan, with German S...

veral examples

veral examples
  1st, transforms the X53 milling machine with SIEMENS 810M 
  In 1998, the company invested 200,000 Yuan, with German Simens the 810M numerical control system, the 611A exchange servo drive system sds was the X53 milling machine carries on X, Y, the Z three axle numerical control transformation to a company's model; Retained the original main axle system and the cooling system; The transformation three axle has used the roller lead screw and the gear drive organization on the machinery. The entire transformation work including the machine design, the electrical design, the PLC procedure establishment and the debugging, the engine bed overhaul, finally is the entire machine installment and the debugging. After the milling machine transforms, processing effective stroke X/Y/The Z axis respectively is 88.0/270/28 billion mm;Titanium Alloy  parts  Maximum speed X/Y/The Z axis respectively is 5000/1500/800 mm/Min; Manual speed X/Y/The Z axis respectively is 3000/1000/500 mm/Min; The engine bed processing precision achieves ±0.001mm. The engine bed three coordinates linkage may complete each kind of complex curve or the curved surface processing
 2nd, transforms the C6140 lathe with GSK980T and the exchange servo drive system sds     
In 2000, with Guangzhou numerical control plant production GSK980T numerical control system, the DA98 exchange servo unit and 4 locations automatic tool rests to an electrical machinery branch factory C6140 lathe X, the Z two axes carries on the numerical control transformation; Retained the original main axle system and the cooling system; The transformation two axes have used the roller lead screw and with the ambulacrum transmission system on the machinery. Entire transformation work including machine design, electrical design, engine bed overhaul and entire machine installment and debugging. After the lathe transforms, processing effective stroke X/The Z axis respectively is 3.90/73 million mm;Titanium Alloy  parts   Maximum speed X/The Z axis respectively is 120.0/3 million mm/Min; The manual speed is 400mm/Min; Manual is fast is X/The Z axis respectively is 120.0/3 million mm/Min; The engine bed smallest migration unit is 0.001mm.
 3rd, transforms the X53 milling machine with SIEMENS 802S 

  In 2000, the company invests 120,000 Yuan, with German Simens the 802S numerical control system, step-by-steps the actuation system is the X53 milling machine carries on X, Y, the Z three axle numerical control transformation to company's another model; Retained the original main axle system and the cooling system; The transformation three axle has used the roller lead screw and the gear drive organization on the machinery. The entire transformation work including the machine design, the electrical design,Titanium Alloy  parts   the engine bed overhaul, finally is the entire machine installment and the debugging. After the milling machine transforms, processing effective stroke X/Y/The Z axis respectively is 63.0/240/28 billion mm; Maximum speed X/Y/The Z axis respectively is 3000/1000/600 mm/Min; Manual enters for speed X/Y/The Z axis respectively is 200.0/800/5 billion mm/Min; The smallest motion unit is 0.001mm.

 Titanium Alloy  parts

2015年9月6日星期日

Renoho Precision Machinery Technology Co.,Ltd: In the numerical control transformation the main m...

Renoho Precision Machinery Technology Co.,Ltd: In the numerical control transformation the main m...: In the numerical control transformation the main mechanical part reequips the discussion  A new numerical control engine bed, must achiev...

In the numerical control transformation the main mechanical part reequips the discussion

In the numerical control transformation the main mechanical part reequips the discussion
 A new numerical control engine bed, must achieve in the design that, Has the high static dynamic rigidity; Movement vice- between friction coefficient small, the transmission is ceaseless; cnc milling machine The power is big; Is advantageous for the operation and the service. When engine bed numerical control transformation should meet the above requirements as far as possible. Cannot think the numerical control installment and the ordinary engine bed connects in has met the numerical control engine bed requirements together, but also should carry on the corresponding transformation to the major component to enable it to achieve the certain design request, can obtain the anticipated transformation goal
 skids guide rail      
 Said to the numerical control lathe that, cnc milling machine the guide rail besides should have the conventional lathe guidance precision and the technology capability, but also must have good bears the friction, the attrition characteristic, and the reduction but sends the dead area because of the friction drag. At the same time must have the enough rigidity, by reduces the guide rail to distort to processes the precision the influence, must have the reasonable guide rail protection and the lubrication
 gear
 The common engine bed gear mainly concentrates in the headstock and the gear box. In order to guarantee the transmission precision, on the numerical control engine bed uses the gear precision class is all higher than the ordinary engine bed. Must be able to achieve the ceaseless transmission in the structure, thus transforms time, the engine bed main gear must satisfy the numerical control engine bed the request, by guarantees the engine bed processing precision
kids the guide screw and the ball bearing guide screw    
  The guide screw transmission relates directly to the transmission chain precision. The guide screw selects mainly is decided requests and drives the torque request in the job precision. Is  not used by job precision request Gao Shike skids the guide screw, but should inspect the original guide screw attrition situation, like the pitch error and the pitch accumulative error as well as matches the nut gap. The ordinary circumstances skid the guide screw to be supposed not to be lower than 6 levels, the nut gap oversized then replaces the nut. Uses skids the guide screw relative ball bearing guide screw price to be  low, but satisfies the precision high components processing with difficulty.
  The ball bearing guide screw rubs loses slightly, the efficiency is high, its transmission efficiency may above 90%; Precision high, the life is long; When start moment of force and movement the moment of force approaches, may reduce the electrical machinery to start the moment of force. Therefore may satisfiedly compare the high accuracy components processing request
 safe protection 
 The effect must take the security as a premise. Transforms in the engine bed must take the corresponding measure according to the actual situation, cuts noticeable. The ball bearing guide screw vice- is the precision part, when the work must take strict precautions against the dust is specially the scrap and the hard sand grains enters the roller conveyer. On longitudinal guide screw also coca overall sheet iron safety mask. The big carriage with skids two end surfaces which the guide rail contacts to have to seal, prevented absolutely the flinty granulated foreign matter enters the sliding surface damage guide rail
 Sixth, After the engine bed electrical system transformation, to  operates, the programmers inevitably brings the new request. Therefore ahead of time carries on new system knowledge training to the operator and the programmers to be extremely important, after otherwise will affect the transformation the engine bed rapid investment production. The training content should include the new operation kneading board disposition, the function, the instruction meaning generally; New system functional scope, application method and with old system difference; Maintenance maintenance request; Programming standard and automated programming and so on.

The key point is makes, gets a good grasp of the operating manual and the programming instruction booklet.  the numerical control transforms se Transforms the scope according to each  equipment differently, must beforehand design the connection partial transformations, if transforms completely, should design the electro-mechanical transformation connection, the operation kneading board control and the disposition, cnc milling machinethe interconnection partial contacts, the parameter measuring point, services the position and so on, the request operates and services conveniently, reasonable, the line moves towards, center the small junction smoothly few, the strong and the weak electrical noise is smallest, has the suitable allowance and so on. Partial transformation, but also needs to consider the new old system the performance match, the voltage polarity and the size transformation, install the position, the digital-analog conversion and so on, when the necessity must manufacture the transformation connection voluntarily.

 Titanium Alloy

2015年9月2日星期三

Numerical control system choice

Numerical control system choice 
 When the numerical control system mainly has three kind of types, the transformation, should act according to the special details to carry on the choice
 Step-by-steps the open system which the electrical machinery drives     
 This system servo drive mainly is step-by-steps the electrical machinery, the power step-by-steps the electrical machinery, the battery solution pulse motor and so on. Cnc machining Entering sends out which by the numerical control system for instruction pulse, after the actuation electric circuit control and the power enlargement, causes to step-by-step the electrical machinery rotation, through gear vice- and ball bearing guide screw vice- actuation executive component. So long as the control command pulse quantity, the frequency as well as the circular telegram order, then may control the executive component movement the displacement quantity, the speed and the heading. 
 This kind of system does not need the physical location and the velocity feedback which obtains to the input end, Cnc machining therefore called it the open system, this system displacement precision mainly decided in step-by-steps the electrical machinery angular displacement precision, transmission part and so on gear guide screw pitches the precision, therefore the system displacement precision is low.
   This system structure simple, debugging service convenient, work reliable, cost low, is easy to reequip successfully
 The asynchronous motor or the direct current machine drive, diffraction grating survey feedback closed loop numerical control system 
  This system and the open system difference is: Physical location feedback signal which by position detector set and so on the diffraction grating, induction synchromesh obtains, carries on the comparison as necessary with the given value, two interpolations enlargements and the transformation, the actuation implementing agency, by the speed which assigns turns towards the elimination deviation the direction movement, until assigns the position and the feedback physical location interpolation is equal to the zero. The closed loop enters for the system  Enters for the system complex in the structure compared to the split-ring, the cost is also high, requests strictly to the environment room temperature. The design and the debugging is all more difficult than the open system. But may obtain compared to the split-ring enters for a system higher precision, quicker speed, actuation power bigger characteristic target. May act according to the product specification, decided whether uses this kind of system.
 The direct current servo electrical machinery drives, encoder feedback semi-closure link numerical control system
 Half closed-loop system examination part installs in among passes in the moving parts, indirectly surveys the executive component the position. It only can compensate a system ring circuit interior part of part the error, therefore, its precision compared to closed-loop system precision low, but its structure and the debugging all compares the closed-loop system to be simple. In makes the angular displacement examination part and the speed examination part and the servo electrical machinery time a whole then does not need to consider the position detector set installs the question.
 The current production numerical control system company factory quite are many, overseas famous company like German SIEMENS Corporation, Japanese FANUC Corporation; Cnc machining Native corporation like China Mount Everest Corporation, Beijing astronautics engine bed numerical control system group company, Central China numerical control company and Shenyang upscale numerical control country engineering research center. 

  When choice numerical control system mainly is each kind of precision which the engine bed must achieve after the numerical control transformation, actuates the electrical machinery the power and user's request.

 Cnc machining