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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

Introduction to the reasons and solutions for the lack of sealing of car windows

  After the window glass is damaged, use glass with the same curvature as the original window glass, and check the glass guide groove and sealing strip for damage.Since car windows often fail to return to their original shape after being repaired, in addition to ensuring that the car window glass can be easily pulled or raised and lowered at this time, attention should also be paid to the sealing around the car window glass after the car window is closed.


When changing the roof, apply a layer of conductive sealant on the periphery of the roof. After the welding is completed, apply hemming glue all over the water trough and at the joints. This will not only help seal the body, but also It can also prevent the body from water accumulating at the weld seam due to flanging

and produce early rust. When assembling the door, paste a whole sealing isolation film on the inner panel of the door below the window. If there is no formed sealing isolation film, it can be replaced by ordinary plastic paper, and then the sealing isolation film is pasted and compacted. Production and assembly of interior trim panels.

When repairing a car door with a sealing flange, attention should be paid to repairing the damaged sealing flange and accurately restoring the shape of the original flange.After repairing the car door, check the leak tightness. The check method is: put a piece of hard paper on the sealing position, close the door, and then pull the paper to judge whether the seal is good or not according to the pulling force.If the force required to pull the paper sheet is too large, it means that the seal is too tight, which will affect the normal closing of the door, and will also cause the seal to lose its sealing performance quickly due to excessive deformation; if the force required to pull the paper sheet If it is too small, it means that the seal is not good, and the door will often block the wind but not the rain.When replacing the door, be sure to apply hemming glue on the flanging occlusion of the inner and outer panels of the new door, and block some small craft holes left during punching with the base tape.

When repairing the car circuit, the sealing rings of all the body holes and holes through the wiring harness should be installed in place, because these sealing rings not only play a sealing role, but also play a role in protecting the wiring harness.If the sealing ring is damaged or the wiring harness can rotate or move in the sealing ring, replace the sealing ring and assemble it firmly with the holes and holes of the vehicle body to stabilize the wiring harness.

When replacing the entire car body, in addition to completing the above items, a layer of sealant should be applied to the overlapped part and solder joints of the weld. The thickness of the adhesive layer should be about 1mm, and the adhesive layer must not have any virtual stickiness. , Bubbles and other defects; apply special edge-folding glue at the edge; apply 3mm-4mm elastic coating and anti-corrosion coating on the entire lower surface of the floor and the lower surface of the front wheel cover; on the upper surface of the floor and the front stand The inner surface of the board should be pasted with sound insulation, heat insulation, vibration reduction and damping film, and then covered with heat insulation felt, and then covered with carpet or decorated floor.These measures can not only greatly enhance the airtightness of the vehicle and slow down the corrosion rate of the car body, but also greatly improve the ride comfort.

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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