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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

Summary of key points for installing tires

Our previous article has given a detailed introduction to tire maintenance. *Recently, the editor has learned some neglected tyre knowledge, and I want to share it with you here.
The tire production date will be distinguished, but also anti-counterfeiting:
Tires are rubber products, so rubber aging will also occur. The shelf life of tire rubber is generally 4-5 years. Tire rubber will accelerate aging after the shelf life and cause tire performance to decline.
As shown in the picture above, “9MCR0810” is the tire production date code. Among them, the “0810” in the last 4 digits of * indicates that this tire is a product produced in the “8” week of the “10” year.
will look at the tire production date does not mean that the tire you buy must be new. Some unscrupulous businessmen modify the production date markings on tires through special molds, and sell tires with expired inventory as brand new tires, earning a high price difference. Generally speaking, unscrupulous businessmen achieve the purpose of tampering with the production date of the tire by polishing or removing the production date mark on the original tire, and then attaching a new mark. Therefore, the production date marks of these “rescheduled tires” and the tires are not a whole, and there are usually seams or unevenness on the edges of the marks. When buying tires, consumers should pay attention to whether there are seams or unevenness at the edge of the tire’s production date marking position to avoid buying inferior “rescheduled tires”.
When installing the tire, pay attention to the inner and outer directions:
Tire inner and outer reverse installation will greatly reduce the drainage performance and grip performance of single-guide or asymmetric tires. If you find that the tires are reversely installed inside and outside, please go to the repair shop to reinstall the tires immediately.
The outside of the tire is usually printed with the words “OUTSIDE”, the production date or the “DOT” mark. The outside of the tire can be judged by one of these three types of marks.
The *tap mark on the tire wall:
As a composite rubber body, the mass distribution of tires is difficult to be absolutely uniform. Therefore, some manufacturers will mark the tire * lightly on the sidewall of the tire. The wheel is mainly composed of three parts: wheel hub, tire and valve . The position where the valve is installed on the wheel hub has the highest quality. Therefore, when installing the tire, the tire * should be lightly marked corresponding to the valve installation, which plays a complementary role and makes the overall mass distribution of the tire tend to be balanced.
The maximum vibration point mark on the tire wall:
The maximum vibration point of the tire indicates the maximum point of longitudinal rigidity of the tire. When the tire rotates one circle, the maximum vibration point is at the position marked by the maximum vibration point. When a tire rotates on the ground once, the vibration force it bears at every angle it passes through is not equal. This phenomenon is called RFV (Radial Force Variation). When the RFV is too large, the tire will generate vibrations that can be perceived by the driver, which affects the driving comfort of the vehicle. Generally, large tire manufacturers will mark the position of this point on the tire during product inspection. If the vibration value of the tire product is found to exceed the standard, it will be treated as a waste product. The tire maximum vibration point mark is of little significance to consumers, so you will not see such a mark on all products in the market. However, RFV parameters are an important standard for the uniformity of tire materi al. RFV testing is a product quality inspection process that tire companies must carry out during production.

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