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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...

Study car vibration and noise

Studying the vibration and noise of automobiles and taking effective measures to control them has also become extremely complicated. At present, effective control measures have been taken to control the internal noise of gasoline and diesel vehicles, while the problem of identifying and controlling noise sources of new energy vehicles such as hybrid vehicles, electric vehicles, and fuel cell vehicles will become a problem for researchers. New subject. Each test will provide effective feedback to optimize the design at this stage. These verification tests and design optimization are repeated to determine the structure of the catalytic converter.

Taking a fuel cell prototype vehicle as the research object, through the experimental analysis of its acoustic and vibration characteristics in the anechoic chamber, the main frequency components of the noise in the vehicle under static and different uniform speed conditions and the corresponding noise sources and their transmission methods are obtained. The corresponding vibration and noise reduction schemes are proposed.

Introducing the noise sources in the car The vibration and noise generated by the driving motor assembly, power steering pump, air-conditioning compressor, fuel cell auxiliary system moving parts (such as hydrogen pump, fan) and cooling water pump of the fuel cell prototype vehicle studied are inside the car The main source of noise. Among them, the drive motor assembly, power steering pump, air-conditioning compressor, and fuel cell cooling water pump are arranged in the front compartment, and the hydrogen pump and fan are arranged in the luggage compartment. Because the prototype car borrows the traditional engine front car body, the rear part of the body does not adopt sound insulation measures, when the fuel cell power system is working, the occupants in the rear seats obviously feel a low “buzzing” roar, and the rear seats The noise is significantly higher than the front seats.

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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