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Working principle of slow wire processing

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 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
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Hydrostatic guideway of CNC machining lathe

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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

Introduction of KOVAR parts

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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 stress,
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Talking about the structure design of automobile filter

cncmachining February 27, 2022

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.

Link to this article：Talking about the structure design of automobile filter

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