#Machining #Manufacturing #Precision machining parts, #Heat sink parts

 #Machining #Manufacturing #Engineering#Heat sink

The material properties

The material properties can be classified into three major headings:

(i) Physical,

(ii) Chemical,

 (iii) Mechanical. Physical properties

   Precision CNC machining parts Density or specific gravity, moisture content, etc., can be classified under  this category. Chemical properties

  Precision CNC machining parts Many chemical properties come under this category. These include acidity or alkalinity, reactivity and corrosion. The most important of these is corrosion which can be explained in layman’s terms as the  resistance of the material to decay while in continuous use in a particular atmosphere.

  Precision CNC machining parts Mechanical properties  Mechanical  properties include the strength properties like tensile, compression, shear,  torsion, impact, fatigue and creep. The tensile strength of a material is obtained by dividing the maximum load, which the specimen bears by the area of cross-section of the pecimen. This is a curve  plotted between the stress along the Y-axis(ordinate) and the strain along the X-axis(abscissa) in a tensile test. A material tends to change or changes its dimensions when it is loaded, depending upon the magnitude of the load. When the load is removed it can be seen that the deformation disappear s. For many materials this occurs up to a certain value of the stress called the elastic limit. This is depicted by the straight line relationship and a small deviation thereafter, in the stress-strain curve.

 

veral examples

veral examples 

 transforms the X53 milling machine with SIEMENS 810M  

   In 1998, the company invested 200,000 Yuan, Cnc machining 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; 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

Ransforms the C6140 lathe with GSK980T and the exchange servo drive system sds 

  In 2000, Cnc machining 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; 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

Ransforms 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. Cnc machining The entire transformation work including the machine design, the electrical design, 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.

Robot's adhibition 2

    Robot's adhibition 2

Manual operation of a simulation of the automatic machinery, ,Precision CNC machining parts 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, 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.

  Precision CNC machining parts  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.

 ,Precision CNC machining parts 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 cuttingtools 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. 

 Precision CNC machining partsManipulator 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. 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.

  

Precision CNC machining parts

The basic requirements for clamping device

The basic requirements for clamping device

   Precision CNC machining parts Without damaging the work piece positioning accuracy and quality assurance process under the premise of clamping devices should be enabled to:   

  1. The size of the appropriate clamping force. It is necessary to ensure that the work piece in the whole process of its stable position vibration small but also so that the work piece does not produce excessive clamping deformation.   

  2. Technology is good. Precision CNC machining parts The complexity of the clamping device should be suited to the production of the Program to ensure production efficiency its structure should be kept simple easy to manufacture and maintenance. 

    3. Good use. The operation of clamping device should be convenient safe and labor-saving.

 Third the basic Clamp

   The original force into a clamping force through the clamping body to achieve.Among the many institutions in the clamping wedge oblique spiral and by their eccentric combination of the most common application of clamping.  

  (A) Wedge Clamp   

  Wedge used as components or transmission of the clamping device clamping body known as the Wedge Clamp.    

  Precision CNC machining parts Wedge clamping directly the oblique wedge of the self-locking conditions are:Wedge angle smaller than the work piece Wedge Wedge and folders between the concrete and the friction angle.

  Namely: a f1+f2  

   In order to ensure a reliable self-locking manual clamping generally take a =6 °~ 8 °. Using pneumatic or hydraulic device drivers do not need the self-locking oblique wedge it is desirable to a =15 ° ~35 °. 

    Wedge clamp is simple in structure than by large self-locking features such as performance it is widely available.

#Machining #Manufacturing #Precision machining parts, #Heat sink parts

 In the past, Dongguan CNC machining plant needed an additional operation on a milling machine or broaching machine to process serrations on parts. In this way, it needs to be set separately on additional machine tools, resulting in additional labor costs (for milling machine or broaching machine operators), of course, additional handling, movement and possible temporary parts storage between processes. In addition, parts may require intermediate cleaning operations before serration.

If Dongguan CNC machining plant regards sawtooth machining as one of the companies operating alone, you will be glad to learn that there is a sawtooth machining razor, which can be used to carry out sawtooth machining on CNC lathe, just like another process. Sawtooth razors are manufactured by schwanog and sold in the United States by GST Tools Co., Ltd. (Roselle, Illinois). The tool is composed of replaceable blade and supporting tool holder. The high-speed steel blade with tin coating consists of a 1 / 4 circle with six teeth. Only the first or guide teeth have a complete (finished) tooth profile. On the other five teeth, the tooth profile is a decreasing profile.
If you take the sawtooth machining of parts as a secondary operation, you can simply use this sawtooth razor as another process on the CNC lathe.
At the beginning of sawtooth machining in Dongguan NC machining plant, the main shaft remains stationary, while the turret goes three times on the Z axis to form the first five teeth and the fully formed sixth teeth in the form of progressive stage.
The tool is mounted on the turret of the lathe and forms sawtooth along the part through continuous z-axis stroke. At the beginning of the process, the spindle remains stationary and the tool runs three times to form the first five teeth and the full shape sixth teeth in a progressive stage. Then the spindle is indexed to the next tooth position (a c-axis is required), in which the first five teeth are formed incrementally and the last tooth is completed. Each time when the spindle is indexed to the next tooth position and the turret completes the part stroke, the machining of one tooth is completed. The process continues until the whole circle is indexed and the sawtooth is completely formed.
Once the first tooth of Dongguan NC machining plant is fully formed, the spindle divides the part to the next tooth position, and the turret goes another way to complete the tooth processing. Every time the spindle is indexed, a complete tooth is formed. The indexing cycle continues until the part is completely machined to the required sawtooth shape.
Dongguan CNC processing factory thinks the process is simple and fast. For example, the sawtooth machining of 1045 steel parts can be completed in less than 7 seconds on an ordinary CNC lathe with c-axis function. Combining the sawtooth machining operation into one lathe process can simplify the processing of parts: the operation does not have to be carried out on additional machine tools, avoiding the cleaning of parts between different processes, the setting and operation cost of additional machine tools, and the additional part handling process. The most important point is that the part is fully machined when leaving the lathe and ready for cleaning and sending to the customer. GST reported that the blade for sawtooth machining can be sharpened by the end user, but facilities for tool re centering must be provided. The removal of the blade is fast and simple because it is fixed with a single screw. Since the tool holder is only an adhesive tool, the tool for sawtooth machining can be used on both multi spindle machine tools with c-axis function and single spindle machine tools.

#Machining #Manufacturing #Engineering#Heat sink

#Machining #Manufacturing #Engineering#Heat sink

 To improve the milling fixture installed in the machine tool stability, Precision CNC machining parts  reduce its intermittent cutting may be caused by vibration, not only in the specific folder have sufficient stiffness and strength, their height and width ratio should also beappropriate, a general H / B ≤ 1 ~ 1.25, in order to reduce the fixture center of gravity, so that as close as possible to the workpiece surface countertops.

Precision CNC machining parts In addition, we must set a reasonable and ear blocks to strengthen the tendons.   If the folder specific wide, can be set up in the same side of two T-slot milling machine table equidistant between the ears Block; of heavy-duty milling fixtures, specific folders should also be set up at both ends of the rings, such as lifting holes or to carry.   In the milling process, the often installed in the milling fixture table, together with the jig with the workpiece feed table for movement.In the milling process, the often installed in the milling fixture table, together with the jig with the workpiece feed table for movement. According to the workpiece feed means of general milling fixture can be divided into the following two types:    

  1. Linear feed-type milling fixture 。In the milling process, the often installed in the milling fixture table, together with the jig with the workpiece feed table for movement.

2. Circle feed milling fixture.Such fixtures are commonly used in the milling machine with rotary table, the workpiece table, together with the fixture with the continuous, slow movement of the rotary feed, no parking will be loading and unloading the workpiece. According to the processing requirements of the two cutter head can also be rough at the same time, finishing  

  Precision CNC machining parts Milling is a flat, keyway, gear and a variety of forming surface processing methods commonly used. Processing the workpiece in the milling machine, the general adoption of the following types of clamping methods:   

   (1) directly in the milling machine table clamping a large workpiece clamping often directly in the table, with stud, plate compactor, which need to dial indicator methods, tools such as zoned to find the needle surface and the cutter is processing relative position.      

 (2) vice flat tool used for clamping the workpiece in the shape of a simple, small parts, general machine tools can be used in clamping vice in the mouth, the need to ensure that when used in machine vice the correct position.

  (3) dividing head with the workpiece clamping, the need for indexing of the workpiece, the general direct clamping head in the sub-degrees. In addition, indexing of the workpiece without dividing head with clamping processing is also very convenient.

 (4) with V-shaped frame workpiece clamping method is generally applicable to.

Grinding technology development trend

Grinding technology development trend

 Precision CNC machining parts Grinding machining is important processing technology in mechanical manufacturing. With precision mechanical products, the requirement of increasing the reliability and service life, high hardness, high strength, high wear resistance, high functional new materials application increased, for grinding processing and put forward many new problems, such as material of grinding machining and surface integrity, super precision grinding and high efficiency grinding and grinding automation, etc. Problems to be solved.At present, the grinding technology is moving toward using super hard abrasives, development of precision and ultra precision grinding, high speed, high efficiency grinding technology and the development of high precision, high stiffness of the grinding machine automation direction. 

 One.   In-depth development of grinding theory and technology research

 Precision CNC machining parts Grinding theory research is the basis for the development of grinding technology, the grinding technology and the development of practice and research provides the opportunity for grinding theory, requirement and new topic, in recent ten years, professionals engaged in the work of grinding, grinding technology and phenomenon many factors for a lot of in-depth research and achieved fruitful results.

 Two.  Unit grinding machine high speed, high precision components manufacturing technology 

 Precision CNC machining parts High precision grinding machine spindle unit, feeding unit, bearing unit and auxiliary unit is the key parts and components. Spindle unit including spindle power, shaft, bearing, and frame sections, she affects the precision of the machining system, stability and application scope, its dynamic performance and stability of high performance precision ultra-precision grinding, play a key role. Feed unit including the position detection unit, Demand of feed units, therefore, flexible operation, high resolution, high positioning accuracy, not crawl and large movement range, both to have larger acceleration, and large enough thrust, high stiffness, quick dynamic response, high positioning accuracy. Machine tools supporting technology mainly refers to the supporting member of design and manufacturing technology. Auxiliary unit technology including fast clamping workpiece, high efficiency grinding fluid filtration system, machine safety devices, chip removal and the workpiece cleaning technology, spindle and grinding wheel dynamic balance technology, etc.