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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

Elimination method of automobile steering pump noise

The steering pump is the power source for car steering. At present, major domestic models such as Jiefang, Dongfeng, Great Wall Pickup and Jinbei Bus all use vane-type power steering pumps. This kind of steering pump is equipped with a flow control valve and a safety valve. It is small in size, light in weight, and simple in system connection. The disadvantage is that it is noisy.

1: The main reason for the noise generated by the steering pump is the mixing of air in the system, especially in the suction area of ​​the hydraulic pump, because the pressure is low, it is easy to produce cavitation, that is, the volume of the bubble is compressed in the high pressure area, and the volume suddenly increases when it reaches the low pressure area. , Produce an explosion and form noise. Therefore, the oil inlet pipeline must be sealed reliably during installation to prevent the joint from loosening due to vibration; the sealing material must be very reliable, and there must be enough hydraulic oil in the oil tank.

2: The second cause of steering pump noise is the failure of the flow control valve, such as improper fit between the valve hole and the valve core, the valve hole is rough, the safety valve and the valve seat are dirty and not sealed, the gasket is not round or has gaps, etc. Both can cause noise. Especially when the control valve is working, the system pressure is transient, which makes the control valve spring fatigue deformation and failure, which will aggravate the noise. Therefore, check the use of the control valve, check whether the mating parts are worn or not, check whether the spring is invalid, and replace these parts if necessary.

3: The third cause of steering pump noise is mechanical vibration. Therefore, when installing the steering pump, ensure that the coaxiality error between the pump shaft and the main engine is less than 0.1mm, and the inclination is less than 30. The connecting pipe should not be too thin or long, and minimize the elbow to avoid liquid vortex. The speed of the steering pump should not be too high to avoid damage to the bearings.

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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