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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

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 of Gear Backlash in CNC Machining Feed System

Elimination of Gear Backlash in CNC Machining Feed System   The transmission gear in the feed system of the CNC machining machine tool must eliminate the transmission gap between the meshing gears as much as possible, otherwise the motion will lag behind the command signal after each reversal of the feed system, which will affect the machining accuracy (accuracy) ). There are the following two common methods for CNC machining machine tools to eliminate the transmission gear gap.   1. Rigidity adjustment method   The rigid adjustment method is an adjustment method that cannot be automatically compensated for the tooth side clearance after adjustment. Therefore, the pitch tolerance and tooth thickness of the gear must be strictly controlled, otherwise the flexibility of the transmission will be affected. This adjustment method has a relatively simple structure and a better transmission rigidity.   (1) Eccentric shaft adjustment method   As shown in Figure 610, the gear 1 is mounted on th

Analysis of Cylinder Block Casting Process

The foundry of Nanjing Automobile Parts Factory (now Nanjing Automobile Factory) was originally the foundry of the general repair and parts factory of a unit. There are teams of melting, core making, styling and copper parts, which produce component blanks for repairing ordnance and auto parts such as pistons, piston rings and bearing bushes. In 1951, the factory cooperated with Beijing Auto Parts No. 5 Factory to trial-produce the Jinggangshan brand motorcycle treadmill; in 1953, it began to produce cylinder heads and cylinder liners and other auto engine parts. The equipment used included melting rate cupolas, sand mixers, and centrifugal casting Simple equipment such as machine, copper furnace and hand crane; in 1956, the factory began trial production of the M20 engine.

is a thin-walled cylinder block casting. Under the conditions at that time, the five-box manual assembly group casting process was adopted. By adopting the vertical casting process, the casting defects such as shrinkage, pores and slag inclusion in the castings were solved, and the production capacity of 20 cylinder block castings was formed. The application research of ductile iron in China began in the early 1950s. On the basis of popularizing the application of dense-baked cast iron, the foundry workshop of Nanjing Automobile Parts Factory uses magnesium silicate or copper-magnesium alloy as a nodulizer to trial production of ductile iron parts, setting a precedent for the application of ductile iron in automobile casting parts in China. At that time, the spheroidizing alloy was placed in the cupola tapping trough and flushed into the molten iron ladle with the flow to achieve the purpose of spheroidizing the molten iron.

The cast castings are cylinder liners and fixtures; in 1955, the factory trial-produced nodular cast iron crankshafts, which was a new way of producing automobile crankshafts in China by “substituting iron for steel and casting for forging”. The foundry of China Casting Machinery Nanjing Automobile Parts Factory was an automobile foundry that developed early on relying on self-reliance in the early days of the founding of the People’s Republic of China. Its completion marked the beginning and beginning of China’s automobile casting production and technology.

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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