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Working principle of slow wire processing

 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

Classification of CNC Machining Occupation Levels

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

Hydrostatic guideway of CNC machining lathe

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

Simulated radiator heat transfer performance comparison table Simulated radiator resistance performance comparison

 

From the simulation data of the double-drain pipe type radiator, the wave distance can be known from the simulation data. The water flow rate of the first drain pipe is basically the same, but the heat dissipation capacity of the second drain pipe is obviously smaller than that of the first row, which is only the first row. The simulation results found that after the cooling air exchanges heat with the second drain pipe, the temperature rises, and the temperature of the air inlet that exchanges heat with the second drain pipe increases, so that the average temperature difference between water and air in the second drain pipe decreases. According to the knowledge of heat transfer, the heat dissipation coefficient of the radiator is related to the average temperature difference between water and air, which is why the heat dissipation of the first drain pipe is significantly smaller than that of the first row. Comparison of results and conclusions The analysis table and table are the comparison of heat transfer performance and resistance performance of single drain pipe and double drain pipe radiator.

Table simulated radiator heat transfer performance comparison table simulated radiator resistance performance comparison can be seen from the table, although the heat dissipation area of ​​the double drain pipe radiator is twice that of the single drain pipe radiator, but under the same working conditions, the double drain Compared with the single drain pipe type, the heat dissipation of the pipe type is only increased, but the wind resistance is nearly doubled. At the same time, the material used to manufacture the double drain pipe type radiator is also the same as the single drain pipe type, so the quality and manufacturing cost of the radiator will increase accordingly. Considering the heat transfer performance, resistance performance, economy and reliability of the radiator, it is not the most effective method to increase the number of water pipe rows to increase the heat dissipation of the radiator. In the actual design of automobile radiators, the improvement of the heat transfer coefficient of the tube-strip radiator should be considered from the aspects of optimizing the structural design of the radiator and improving the manufacturing process. Through the heat transfer wind tunnel test and numerical simulation study of a commercial vehicle tube belt radiator, according to the comparison and analysis of the simulation results, under the same working conditions, the double drain pipe type only increases the heat dissipation than the single drain pipe type. , While the wind resistance has nearly doubled, and the manufacturing materials have also nearly doubled. Therefore, considering the heat exchange performance, resistance performance, economy and reliability of the radiator, it is not the most effective method to increase the number of water pipe rows to increase the heat dissipation of the radiator.

The automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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