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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

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

Tire daily maintenance rules

 

The daily tire maintenance should emphasize that the correct air pressure should be maintained when driving. The tire sidewall has the highest air pressure value provided by the car manufacturer, and the air pressure of all tires (including the spare tire) should be checked at least once a month when they are cooled. However, it is not enough to just check. If you find that the air pressure is decreasing too fast, you must find out the reason to avoid leaving hidden dangers and being caught off guard at a certain moment. Staples, cuts, aging and cracking of valve rubber may all be the culprits. If it is a new car, check whether the edge of the rim rim and the tire are in good fit, and whether there has been a water leak check and an air leak test. After finding out the cause, you can find an experienced dealer or a large tire shop to inquire whether it is worth repairing, because behaviors such as nailing will cause damage to the internal structure of the tire, which is not worth continuing to use. In any case, do not exceed the reasonable speed required by driving conditions and legal restrictions. If you encounter obstacles such as rocks, potholes, etc. ahead, you should avoid or pass slowly. Because even if the inflation pressure is correct, at high speeds, if the tire encounters road obstacles, the probability of damage is higher than at low speeds.

The tread of a radial tire has a steel wire belt layer, but the tire side is not covered by a steel wire layer. When driving at a high speed, the tire hits pits and other foreign objects, causing the tire to severely squeeze between the impact object and the rim flange Deformation can cause the cord fabric to break, and the air inside the tire will push up from the broken yarn to form a bulge. Continued use of such a tire will cause more and more yarn breakage, and eventually a puncture. Always check the condition of the tire, including whether there are bulges, cracks, cuts, studs, and abnormal tire wear. Some new cars have not been bought for long, and the tires on both sides of the car wear more on one side and less on the other, or the shoulder wear is faster than the rest of the tread. This is caused by poor tire positioning. Four-wheel positioning should be considered. Even if the vehicle is traveling less than 8,000 kilometers at this time, the tires bought for hundreds of dollars will easily be eaten. Don’t simply change the tire. The vehicle’s own condition will not change, and the new tire will still cause problems. This is as meaningless as changing your shoes instead of having a problem with your feet. If the tire shakes excessively, the wheel may be unbalanced. This situation will not only shorten the life of the tire, but also affect the handling of the vehicle, which may be dangerous. If the tire is worn to the wear indicator, stop using it.

There is a wear indicator at the position of 1.6 mm left in the tread groove. Worn to this mark, it must be replaced. It is dangerous to use tires that exceed the mold consumption indicator, especially when driving on wet ground. Because the pattern is ground, the drainage performance of the tire is greatly reduced, and the tire and the water surface basically form a water-mill state, which hinders the contact between the tire and the ground, and the grip is greatly reduced, which poses a safety hazard. The spare tire should be avoided near sunlight, oil, acid, and hydrocarbons, which will erode the tire. All tires should be stored in a cool, dry and dark room to avoid the danger of moisture accumulating in the tires. Due to pressurization, liquid may enter the carcass layer through the inner liner of the tire, which can cause sudden damage to the tire. When buying tires, the storage environment of tires can also be used as an aspect of inspecting tire shops.

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