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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...

Coating function of automobile exhaust gas purifier

The entire automobile exhaust gas purifier is mainly composed of four parts: carrier, coating, damping pad and shell. The carrier is a porous, heat-resistant solid substance that carries the active component. Currently, a honeycomb monolithic ceramic carrier is generally used, and this carrier is extruded from cordierite. Its advantages are that it has good thermal stability, strong resistance to cold and heat shocks, and a small thermal expansion coefficient. The shape of the carrier generally includes a circle, an ellipse, a racetrack shape, and irregular shapes similar to a circle.

coating is to disperse the catalytic material on the carrier, including rare earth and precious metals platinum, palladium, rhodium, ruthenium and other substances. The damping pad is located between the shell and the carrier, and its function is to prevent vibration, reduce stress, and protect the carrier. It is designed based on pressure.

The purifier shell is the main part of the structural design, and its material and shape are important factors that affect the conversion efficiency and service life of the purifier. Since the purifier is installed under the chassis of the car and connected to the exhaust pipe of the engine, the exhaust contains water vapor and is susceptible to corrosion. In order to avoid corrosion, the current shell material is mostly stainless steel containing Ni, Cr or cold-rolled plate with aluminum immersed on the surface. The shape design of the housing requires that the vortex and separation of the air flow through the purifier be reduced as much as possible to prevent the increase of air flow resistance. Special attention should be paid to the shape design of the intake front cone to ensure the uniformity of the intake flow to improve the conversion efficiency and service life. In order to enhance the strength of the shell and prevent deformation, it should be considered to provide concavo-convex reinforcing ribs on the shell. 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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