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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 lock the solenoid valve from power off in the automobile control system

In the A4LD automatic transmission, when certain situations occur, the electronic control unit de-energizes the lock-up solenoid valve and releases the lock-up clutch. These situations include: the engine cooling water temperature is below 53℃ or above 116℃, the throttle valve is completely closed, the throttle valve is suddenly opened or closed, the accelerator pedal is pressed hard or the throttle valve is fully opened, and the intake manifold vacuum is low. When the engine speed is lower than the set value, and when the car is braking.

Specifically, when the engine cooling water temperature is lower than 53°C, the lock-up clutch will not be locked, so that the engine can be fully warmed up and can withstand the work load smoothly; when the cooling water temperature is higher than 116°C, the same will not happen. The purpose of locking is to reduce the load on the transmission system and help cool the engine. When the cooling water temperature is within the normal range, the electronic control unit will pay close attention to the electric signal sent by the throttle position sensor. Unlock the clutch during the throttle period to reduce engine emissions and improve fuel economy: If the signal indicates that the throttle valve is open or fully open, the electronic control unit will also notify the lock solenoid valve to de-energize for faster Accelerate the vehicle and utilize its unique torque-increasing effect in the torque converter. The purpose of disengaging the lock-up clutch even when the throttle valve is opened and closed suddenly and briefly is to prevent the lock-up clutch from repeatedly operating during this period. Correspondingly, in the electronic control unit, the memory program can ensure that after a slight change in the throttle position, the action of the lock-up clutch is delayed for a period of time.

The electronic control unit in the system also pays close attention to the engine speed signal provided by the ignition sensor and the intake manifold vacuum signal provided by the intake manifold absolute pressure sensor. When the engine speed drops below the determined function value at a low vacuum, the electronic control unit will notify the lock solenoid valve to de-energize, so as to ensure that the torque converter changes from fourth gear to third gear without locking the torque converter. Downshifting of gears, in order to obtain the best shifting smoothness and softness.

In addition, in any case, as long as the electric signal from the brake switch indicates that the driver is braking, the control unit of the electronic control system will also notify the lock solenoid valve to de-energize to prevent damage to the engine during sudden braking.

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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