#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 #Precision machining parts, #Heat sink parts

The application of industrial manipulator 

 Manipulator is in the process of mechanization, automation production, developed a kind of new type of device. In recent years, cnc machining parts with electronic technology, especially the wide application of electronic computer, the robot's development and production has become a high technology developed rapidly in the field of an emerging technology, it promoted the development of the manipulator, make the manipulator can achieve better with the combination of mechanization and automation.

 Manipulator although it is not as flexible as manpower, but it can have repeated work and labor, do not know fatigue, is not afraid of danger, cnc machining parts snatch heavy weights strength characteristics such as larger than man, as a result, the manipulator has been brought to the attention of the many departments, and have been applied more and more widely.

 (1) Machine tools machining the workpiece loading and unloading, especially in automatic lathe, use common combination machine tools.

(2) Widely used in the assembly operation, it can be used to assemble printed circuit board in the electronics industry, it can be in the machinery industry to assemble parts.

 (3) Can be in working conditions is poor, repetitive easy fatigue of the work environment, to instead of human Labour.

(4) The development of the universe and the ocean.

(5) Military engineering and biomedical research and test. 

   Application of robots can replace people in dull, repetitive or heavy  manual work, to realize mechanization and automation of production, instead of human in harmful environment of manual operation, improve labor condition, ensure the personal safety. In the late 1940 s, the United States in the nuclear experiments, firstly adopts manipulator handling radioactive materials, people in the security room to manipulate manipulator for various operation and experiment. After the '50 s, robots gradually extended to industrial production department, for use in high temperature, serious pollution of local leave work pieces and the loading and unloading materials, as auxiliary device in the machine tool automatic machine, automatic production line and processing center in the application, complete the material up and down or from libraries take put the knives and replace tool operations such as fixed procedure. Manipulator is mainly composed of hand and motion mechanism. Hand mechanism varies according to the usage situation and operation object, the common are holding, hold and the adsorption type etc. Motion mechanism usually driven by hydraulic, pneumatic, electric devices. Manipulator can be achieved independently of scaling, rotation and lifting movement, generally speaking, there are 2 ~ 3 degrees of freedom. Robots are widely used in machinery manufacturing, metallurgy, light industry and atomic energy etc.   

 Manipulator is used in the production process automation with grab and move the workpiece is a kind of automatic device, it is in the process of mechanization, automation production, developed a new type of device. In recent years, with electronic technology, especially the wide application of electronic computer, the robot's development and production has become a high technology developed rapidly in the field of an emerging technology, it promoted the development of the manipulator, make the manipulator can achieve better with the combination of mechanization and automation. Robots can replace humans do dangerous, repeat the boring work, reduce human labor intensity and improve labor productivity. Manipulator have been applied more and more widely, it can be used for parts assembled in the machinery industry, processing the workpiece handling, loading and unloading, especially on the automatic CNC machine, combination machine tools more common use. At present, the manipulator has developed into a flexible manufacturing system of FMS and flexible manufacturing cell is an important component of FMC. The machine tool equipment and manipulator of a flexible manufacturing system or flexible manufacturing unit, it is suitable for medium and small batch production, can save a large workpiece delivery device,cnc machining parts structure is compact, but also has a strong adaptability. When the workpiece changes, flexible production system is easy to change, is advantageous to the enterprise continuously updated marketable varieties, improve product quality, better adapt to the needs of the market competition. But at present our country's industrial robot technology and its engineering application level and foreign than there is a certain distance, scale and industrialization level is low, research and development of the manipulator has direct influence on raising the automation level of production in our country, from the consideration on the economic and technology is very necessary.

Therefore, carries on the research design of the manipulator is very meaningful.

#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.

 

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#Machining #Manufacturing #Engineering#Heat sink

As a result of milling and cutting force cutting more and more intermittent cutting edge, easy processing of vibration, so they should pay attention to the design of milling machine fixture: clamping force to be sufficient self-locking and anti-stroke; fixture installation to be accurate and reliable , that is, when the processing installation and the proper use of directional keys on the knife device; precision turned parts specific folder have sufficient stiffness and stability, the structure must be reasonable. 

 precision turned parts As a result of milling and cutting force cutting more and more intermittent cutting edge, easy processing of vibration, so they should pay attention to the design of milling machine fixture: clamping force to be sufficient self-locking and anti-stroke;fixture installation to be accurate and reliable , that is, when the processing installation and the proper use of directional keys on the knife device; specific folder have sufficient stiffness and stability, the structure must be reasonable. 

1. Directional keys

 Directional key position, also known as keys, installed on the bottom of the vertical slot fixture, generally with two, an in a straight line, the farther the distance, the higher the precision-oriented, with screw fastening in the specific folder.   Directional keys work with the milling machine with table-shaped slot in the machine tool fixture to determine the correct position; can absorb part of the cutting torque, reducing the load on clamping bolt to increase the stability of the fixture, so flat and some special drilling jig boring machine fixture is also frequently used.  Directional keys are rectangular and round two.

 2. Of the knife device

   precision turned parts precision turned partsDevices on the knife block and knife by the side of the foot of the fixture and tool used to determine the relative position. The structure of the form of a knife depends on the shape of the surface processing.

  Directional high-precision fixture should not be used or heavy directional keys, but in the specific folder on one elongated side processing as a base to look for is the installation location calibration fixture.Knife block on the pin and screw fastener commonly used in the specific folder, its location should be easy-to-use plug-foot on the knife, without prejudice to the workpiece loading and unloading. On the knife when the knife cutter block with a plug in between the feet with the knife tool to avoid direct contact block or cause damage to the knife blade block premature wear. Cypriot Cypriot feet are flat feet and two-foot cylindrical plug, the thickness and diameter of 3 ~ 5mm, manufacturing tolerance h6.

  Side of the knife block and feet have been standardized (the design can be found in the relevant manual), use the total fixture Sedat map scale should be marked on the knife block size and the work surface and positioning the location between the components. Devices should be installed on the blade of the knife and is easy to cut one end of the workpiece.

  

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Helical Clamp   

 Precision CNC machining parts  Used as intermediate screw transmission components are collectively referred to as the clamping screw clamping body organs. Because of its simple structure reliable clamping common good and as a result of the small helix angle spiral of self-locking clamping body good clamping force and the clamping itinerary are larger fixture on manual with the most a clamping body.   

  1. Simple screw clamp body

  The simplest spiral as a result of the direct use of clamping bodies pressed workpiece screw head so easy to Precision CNC machining parts  damage the surface of the work piece under pressure or driven rotating work piece. So often in the head with swinging Press. Press with the work piece as a result of friction between the Press and the torque is greater than the friction between the screw torque screw together with the Press will not rotate. 

   Clamping action slow time-consuming loading and unloading the work piece is a single spiral Another drawback of the Clamp. To overcome this shortcoming the rapid clamping bodies can be.

 2.Clamp screw plate    

  Precision CNC machining parts Institutions in the clamping the use of spiral plate is very common common structure of the spiral structure of a typical plate size has been standardized the designer can refer to the relevant national standards and fixture design manual design. 

  

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#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.

Manipulator

Manipulator

  Robot developed in  Precision CNC machining parts 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, in both structure and performance advantages of their Precision CNC machining parts 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.

 Precision CNC machining parts 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, 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.