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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

How to solve the sensor system failure

If the signal from each input sensor or switch indicates that the engine cooling water temperature is lower than 24C, or the following situations occur, such as the throttle valve is suddenly opening and closing or even completely closed, the atmospheric pressure is lower than 66.66kPa, the car is braking, When the car is downshifting from fourth gear to second gear and upshifting from second gear to third gear, the lock-up clutch will not be locked.

In addition, because the failure of the input device (such as a sensor or switch) will endanger the function of the electronic control system, the system will automatically switch to the failure mode control state when an input sensor or switch fails. The lock of the lock release has occurred.

Similar to Chrysler’s approach, when the engine cooling water temperature rises above the prescribed lower limit (24°C), the throttle position sensor and the vehicle speed sensor will become the key input devices that determine whether the lock-up clutch is locked or not. At this time, the electronic control unit will make its control decision based on the two sets of throttle openings as a function of the vehicle speed curve.

If the car is driving in third gear, when the throttle opening is small, the lock-up clutch of the torque converter can be locked when the vehicle speed is only 43km/h: when the throttle opening is large, unless the driving speed is as high as 89km /h, otherwise the lock will not occur. When the car is running in fourth gear, if the throttle opening is small, the speed at which the lock-up clutch is locked is 56km/h; and when the throttle opening is large, unless the vehicle speed reaches 89km/h, it will lock. Will not happen. In addition, in the third gear state, the throttle opening corresponding to the lockup of the torque converter lock-up clutch is greater than 8% but less than 59% from the hot idle position: while in the fourth gear state, this The throttle opening is changed to greater than 5% and less than 45%. There is also a lock-up hysteresis zone.

Generally speaking, the conditions required for locking to occur are that the throttle opening is small and the vehicle speed is high. Once it has been locked, in order to improve the driving performance of the car, a larger one should be allowed before the lock is released. Throttle opening and lower vehicle speed appear.

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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