Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t
The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state. CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200 beryllium copper and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette
1. Blue-collar layer: That is, CNC machining operation technicians, proficient in machining and CNC machining process knowledge, proficient in the operation and manual programming of CNC machine tools (attributes: automated machine tools), understand automatic programming and simple maintenance of CNC machine tools (attributes: automated machine tools), such There is a large market demand for personnel, and they are suitable for operating workers of CNC machine tools (attributes: automated machine tools) in the workshop, but due to their single knowledge, their wages will not be much higher. 2. Gray collar layer: One, CNC machining programmer: Master the knowledge of 5 Axis CNC machining Aluminum technology and the operation of CNC machine tools (attributes: automated machine tools), be familiar with the design and manufacturing expertise of complex molds (title: mother of industry), and be proficient in 3D CAD/CAM software, such as UG, GOOGLE PRO/E, etc. ; Familiar with CNC
Five-axis processing of plastic parts is a more commonly used form of processing now. It can process complex-shaped parts that ordinary machine tools cannot process. However, when using five-axis processing, you also need to master the corresponding technology, otherwise you will be processing complex parts. Quality problems are prone to occur when
1. Compile the tool program
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Although the tool length compensation function in five-axis machining is still effective, the tool radius compensation is invalid. This is because the ISO file does not provide enough data to recalculate the tool position. Therefore, in order to ensure reliable machining quality, it is necessary to compile different programs for different diameters of the tool when performing five-axis machining.
2. Use post processor
The difference between five-axis and three-axis machine tools is that there are two rotating coordinates on the five-axis machine tool and the tool position is converted from the workpiece coordinate system to the machine tool coordinate system, and the coordinates need to be changed several times in the middle. With the help of the current popular post processor generator, the post processor of a three-axis Cnc Machine tool can be generated only by inputting the basic parameters of the machine tool. For five-axis CNC machine tools, there are currently only some improved post-processors and the post-processors of five-axis CNC machine tools need to be further developed.
3. Solve the problem of nonlinear error and singularity
The kinematics of five-axis machining after the introduction of rotating coordinates is much more complicated than that of three-axis machine tools. One of the main problems related to rotation is the nonlinear error and it belongs to the programming error. In order to avoid this error, the programmer cannot know the size of the nonlinear error in the pre-calculation stage. Only after the machine tool program is generated by the post processor, the nonlinear error It is possible to calculate the error.
Although five-axis machining has more advantages than ordinary machining methods, in order to avoid the inefficiency of the entire machining process and the unsatisfactory quality of the machining, when using the five-axis machining of plastic parts, everyone should program the tool first. After that, we must make good use of post-processors and solve problems such as non-linear errors.
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