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 bett...
The Purpose Standardize the management of the scrapping of the company's metal stamping dies, prevent the loss of company assets, and formulate this system specially. Scope of application It is suitable for the management of the company's scrap molds. Definition If the molds listed in the assets of the company fall under one of the following circumstances, the use management department may apply for scrapping. 1. Molds that exceed the specified service life. 2. The mold is severely damaged by accidents or accidents, and molds that cannot be repaired or have no repair value. 3. Metal stamping dies that have not reached the service life, but due to safety, quality, efficiency and other issues, the repair still fails to meet the minimum requirements of the customer's product process or affects the production safety and efficiency. 4. Product customers have stopped placing orders or have not placed orders for molds in several years. 4. Responsibilities 1. Responsibilities of th...
KOVAR parts are commonly used as metal casing materials in the electronic packaging industry. Because they have a linear expansion coefficient close to that of molybdenum group glass, and can produce less sealing stress during the sealing (melting) process with molybdenum group glass, so To obtain good air-tightness, in order to make the metal tube and shell to achieve air-tight sealing, in the entire sealing process, the annealing process undoubtedly plays an important role as a link between the previous and the next. The internal stress generated during KOVAR machining also prepares the material structure for the implementation of the subsequent process-the sealing process of the metal parts. The main purpose of annealing Kovar shell before sealing is to: (1) Eliminate machining stress. When Kovar undergoes plastic machining deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stre...
In summer, there are relatively more accidents caused by flat tires. Some citizens fill the tires of their cars with nitrogen to prevent flat tires. Is there any benefit to tire nitrogen filling? Can a flat tire be prevented? Tian Jinsheng, secretary-general of the Motorsports Association of this city, introduced that if conditions permit, it is possible to fill the tires of your car with nitrogen, which can prevent tire blowouts to a certain extent.
According to experts, there are certain benefits of filling car tires with nitrogen. Nitrogen is not easy to expand and contract with heat, and has a small deformation range. When the temperature rises, the air pressure in the tires will not increase significantly, and the normal tires can be maintained for a long time. It also reduces the tire vibration on the road and improves the stability of tire driving. In addition, nitrogen filling can also reduce the noise during driving. If conditions permit, car owners can consider filling the tires of their cars with nitrogen, especially for vehicles that often run at high speeds, run long distances, and often drive on poor roads. It is worth noting that when filling with nitrogen, the original air should be released, and it is not advisable to mix air and nitrogen together, otherwise it will not play its due role.
In addition to the method of nitrogen filling, to prevent the car from puncturing the tire, the vehicle should also be inspected regularly. After entering the summer, the tire pressure should be appropriately reduced to maintain a normal level of tire pressure. In addition, the entire tire should be inspected to observe whether the tire has bulges and hidden injuries. If there is any bulge, it should be replaced in time to prevent sudden puncture. Pay special attention to the situation of the front tire. On weekdays, you should pay attention to the wear of the tire pattern and the aging of the rubber. If you find that the wear of the pattern has reached the design limit, you should replace the tire in time.
If the front wheel of the vehicle suddenly punctures during driving, the vehicle will immediately deviate in the direction of the puncture. The owner should immediately turn on the hazard warning flasher, and at the same time hold the steering wheel firmly with both hands, release the accelerator, and do not step on the brakes, and wait for the vehicle to slow down. , Pull over and stop again. If there is a puncture on the rear wheel, as long as the vehicle is not at a particularly high speed, the vehicle will not deviate seriously. After turning on the hazard warning flasher, the owner can control the steering wheel and gently step on the brakes to stop the vehicle slowly. Down.
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