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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

Teach you to judge tire aging information

  Except for a few car owners who have experienced a tire blowout on the road, they will pay special attention to the tire status of the vehicle, and more car owners have a vague understanding of when to replace the tires. Most car owners are forced to replace their tires, damaged or punctured. After a puncture, a puncture, etc., the tire must be replaced.However, this forced replacement of tires is actually a remedial task, and invalid tires have already brought danger.
  XNUMX. When should tires be replaced?
  The wear and aging of tires are closely related to the use of the vehicle and the driving environment. It cannot be assumed that the tires must be replaced as long as possible. The owner can determine whether to replace according to his own judgment:
  1. When the tire is worn to the wear limit mark, it must be stopped. Data shows that the tread depth is less than 1.6 mm as the wear limit.
  If you often drive on wet and slippery roads with low friction, it is best to ensure that the tread pattern thickness is twice the above value.You can buy a gauge to measure the thickness of the tread pattern, or you can use a one-yuan coin to insert into the tread groove along the top of the national emblem, because the distance between the edge of the coin and the top of the national emblem is between 1 and 2 mm, so if At this time, you can also see the entire national emblem sign, indicating that the tread pattern thickness is insufficient.
  2. The tires need to be replaced if they are seriously aging.
  The tires are rubber products, so they will naturally age apart from wear. Therefore, the shelf life of general tires is three years, but one thing is certain is that if the tires are purchased and not used, the natural aging speed is not the same as the speed installed on the car. .
  3. Tires with deformed treads or bead damage, tires with sidewalls damaged by running out of air, and tires corroded by chemicals must not be used anymore.
  The sidewall of the tire is the most fragile part. If the wound is wound, it is extremely dangerous even after repair.If there are visible cracks and cuts on the sidewall of the tire, there may be air leak cracks in the future, and even more serious, it will cause a flat tire.
  4. If the tire has a bulge, it cannot be used.
  What kind of situation is an abnormal bulge?It is usually due to insufficient strength on the outer surface of the tire, which results in a bulge that is higher than the normal tire surface.If the bulging tires are not replaced in time, the areas with insufficient strength on the tread are likely to cause sudden bursts, and tire bursts are extremely easy to occur when driving at high speeds.
  5. If other damage affects the safety of the tire, it is not allowed to continue to use it.
  Different road conditions, the vibration of the vehicle when driving is different. It is normal for the vehicle to have some jitter, but if the jitter is caused by the axial deviation of the tire or the unbalanced force, you must go to the repair shop to do it. Check and repair.If the abnormal jitter is not caused by the tire, attention should also be paid to investigate the abnormality as soon as possible, because long-term excessive vibration and jitter will damage the performance of the tire.
  XNUMX. What factors will accelerate tire wear?
  1. If you experience some bad road conditions, the tires will wear out faster than when driving on a smooth road.
  2. If you drive irritably, abrupt acceleration and braking will also accelerate tire wear.
  3. Daily maintenance will also have a significant impact on the service life of tires, such as too frequent four-wheel alignment of vehicles, regular air pressure inspections, and so on.
  XNUMX. How to judge that the tire is close to failure state?
  Generally speaking, the failure state of a tire has the following manifestations. Although it cannot be absolutely said that the tire has completely failed, the tire must be replaced as soon as possible to avoid accidents.
  1. The pattern on the surface of the tire has worn out;
2. There is a hard injury on the side of the tire due to impact or other reasons;
3, the surface of the tire has blisters and has begun to leak;
4. The reason has not been found out, but the tires often lose air;
5. Although there is no serious injury, the tire has been repaired several times and there are too many injuries.
If a tire that has nearly failed is not replaced in time, resulting in a vehicle passing accident during driving, causing the vehicle to lose control or the vehicle to break down, the consequences will be catastrophic.
Car owners can complete the simple vehicle inspection tasks such as judging whether the tires are deformed.
XNUMX. What kind of hazards will be caused by using expired tires?
1. What is a stock tire?
New tires generally refer to tires that have been manufactured within one year.If the tires sold to customers have been out of the factory for more than one year, they are generally treated as “stock tires”.The seller should tell the customer the actual production date of the tire and give a certain discount.
2. What is the difference between stock tires and new tires?
The warranty period of tires is 3 years. This time is calculated from the date of manufacture, not from the date of purchase.
If you buy a tire that was produced two years ago, then the warranty period is only one year left.
Tires are rubber products, and the rubber may be aging after standing for more than 3 years, which may affect the safety of use.
XNUMX. How to read the logo information on the tires?
1. The trademarks on the tires are all marked with English letters.The trademark letters of the genuine tires are very clear and easy to identify.Pay attention to tire trademarks and do not buy counterfeit tires.
2. There will be 4 Arabic numerals on the sidewall close to the steel rim, which are used to indicate the factory date of the tire. The first two digits indicate the week number, and the last two digits indicate the year. For example, 0814 means that the factory date of this tire is the 8th week of 2014.
3. When the tire leaves the factory, the manufacturer will post a bar code, so you can enjoy the three guarantees, and the corresponding manufacturer can also be identified through the bar code. If there are no barcodes on the tires, such tires are likely to be products of unknown channels.
4. There will be a protruding part in the tire groove. If the groove is worn to the protruding part, it means that the tire needs to be replaced when it is time to be replaced. Pay attention to check it during each maintenance.
The safety line of the tire marks the lifeline of the vehicle. If the effective use range of the tire is not treated correctly, careless driving will often cause the vehicle to have a hidden danger of potentially dangerous accidents.

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