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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 bett...

What are the rules for metal stamping die scrap tube?

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...

Introduction of KOVAR parts

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...

Talking about the structure design of automobile filter

The automobile filter has a cylindrical shape with a pleated filter paper inside in order to have a larger filter surface in a certain volume. Another structure is composed of spirally wound crepe paper, which is mainly used for fuel oil filtration. The filter of this structure can be regarded as a special case, which is different from the most widely used pleated paper filter. Most filter papers are impregnated with resin, and the base paper has a great influence on the determination of filtration performance, while the resin imparts structural strength, so that the filter paper will not be damaged during the process of making the filter and under the final application conditions.

Paper is a web composed of cellulose fibers or other fibers, which is formed by copying from an aqueous suspension of these fibers. The choice of fiber is very important. The general rule is to obtain the best combination of physical properties (permeability, strength, thickness, etc., these indicators determine the filtration performance) at the lowest production cost.

Synthetic fiber-rayon is often used to obtain the high permeability of the paper. The polyester fiber is used to make the lubricating oil filter have high temperature resistance.

In the production of filter paper, the papermaking process is as follows: disperse the dry pulp into water, the general fiber concentration is about 6%; beating (that is, cutting and brooming the fibers): cutting the fibers to a length suitable for making a satisfactory paper, and exposing It can provide paper strength bonding points and reduce permeability. Dilution, followed by purification (removal of granular dust) and screening (removal of fiber bumps or clumps). Strength is the hydrogen bonding formed between the fibers in contact with each other during the drying process. There are many grades of paper, and the permeability generally increases as the tightness decreases. For 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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