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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 bett...
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What are the rules for metal stamping die scrap tube?

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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...
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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 stre...
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Cooling mechanism of micro-lubrication in machining

cncmachining February 12, 2022

The cooling of micro-lubrication machining mainly relies on the fluidity of compressed air to take away heat, and its effect is weaker than that of cutting fluid. Therefore, the chips are required to leave the processed area quickly.To achieve this goal, the following aspects need to be paid attention to:
1. Ensure that the compressed air pressure is stable
The change of compressed air pressure leads to a decrease in the quality of lubrication, and also reduces its auxiliary cooling effect and reduces its role in helping the chips leave the machined surface.Where it is not suitable for purging, the method of auxiliary compressed air chip removal can be used.
2. Reduce the problem of long chips during processing
The shape of the chips is an issue that needs to be paid attention to under the condition of micro-lubrication. It is to achieve short chips and chips and avoid long chips.Specific measures include keeping the cutting edge sharp, researching and adopting an edge shape suitable for chip breaking.In rough machining, a large amount of cutting is used to form thicker short chips, and a high-speed speed is used in finishing, and a small amount of cutting is used to obtain a good surface quality.
Principle: The heat generated by processing will cause the temperature rise of the chips, tools, and workpieces, and the accumulation of chips will aggravate the temperature rise of the tools and workpieces.More than 80% of the heat can be discharged through the short chips, and the chips quickly leave the workpiece. This is a key factor that affects the success of quasi-dry cutting.

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