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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

The application of the universal test system on the automobile radiator test bench is evenly arranged along the axis

 

The heat dissipation system test application now uses the test bench of Dongfeng Behr Automotive Radiator Company that uses this test system as an example to describe the working process of this system in detail. The performance test of automobile radiator is mainly carried out according to JB2293~1978, and the test content mainly includes three items: heat dissipation performance, wind resistance, and water resistance. The user can set the parameters of the working condition control point by himself, and the execution mode of the test working condition parameter collection and control is computer automatic/user manual. According to the above-mentioned basic principle diagram, the design of the test bench test system. The test bench is mainly composed of air duct (including fan), circulating water circuit and measurement and control device. The fan draws air to form a uniform air flow in the air cylinder to flow through the test piece. The circulating water path sends the hot water in the heating boiler to the test piece. When the air flows through the test piece, it takes away part of the heat of the hot water, thereby reducing the water temperature. The system automatically adjusts the heating power or fan speed to quickly achieve thermal balance under different working conditions. By measuring the test parameters under various working conditions, the standard heat dissipation and resistance characteristics of the test pieces can be obtained to evaluate the performance of the radiator.

Data collection The data collection points are set in accordance with national standards and combined with the actual conditions of the test bench. Wind speed, wind temperature, wind resistance, wind pressure and wind speed are measured by a Pitot tube flow meter, including a Pitot tube and a micro-pressure sensor. The test piece is placed at the center of the cross section of the test section, and all air flowing into the air duct passes through the test piece. The air temperature includes the inlet air temperature t (℃) and the outlet air temperature t. Since the temperature field does not change much, a single Pt100 thermal resistance meter is used to place it in the center. Since the airflow passes through the radiator, both the temperature field and the flow field are greatly disturbed. The application of the universal test system on the automotive radiator test bench is to evenly arrange four Pt100 thermal resistance thermometers along the axis to obtain the average wind speed.

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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