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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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Turning with trace oil mist lubrication

cncmachining February 05, 2022

In most cases, lathes use cutting fluid lubrication and cooling. The use of a large amount of cutting fluid has a great impact on the operating environment and the health of the operators. At the same time, the processing cost of cutting waste fluid is also very high. Due to the many problems existing in cutting fluid lubrication and cooling, new technologies have emerged to replace the traditional lubrication and cooling methods. In the turning process, the area where the cutting tool is prone to wear is the rake face. Therefore, spraying and penetrating a small amount of lubricating oil mist into this during the machining process will greatly reduce the friction. When applying trace oil mist lubrication to the lathe, the following should be paid attention to: For the external injection system lathe, the installation of the trace lubrication system should not affect the processing and the movement of other parts; the internal cooling lubrication lathe is the lubricant sprayed in the form of suspended oil mist particles. The cutting area must maintain a reliable flow of suspended particles. Therefore, the design of the machine tool should consider ensuring the transportation of suspended particles and the reliable sealing of the passage. The selection of the cutting tool jacket must match the cutting tool and ensure that the lubricating oil mist particles can reach the cutting area. The main influencing factors of machining quality and machining efficiency include the amount of back-cutting, feed rate, cutting linear speed, etc., in order to improve the impact of the cutting fluid on the machining environment and the adverse impact on the maintenance of the lathe. It is necessary for the research and application of micro-oil mist lubrication of lathes. The advantages of the micro-lubrication method are:

1. Reduce cutting costs and maintenance costs.
2. The machine tool does not need to consider the protection design to prevent leakage, which can increase the life of the electrical system and reduce the maintenance cost.
3. Better processing quality and higher processing efficiency can be obtained.
4. It can increase the machining life of cutting tools. <The air source pressure of the micro-oil mist lubrication system of the lathe is required to operate normally at 5-7bar, and better results can be obtained when the air source pressure is increased to 8-10bar.

Link to this article：Turning with trace oil mist lubrication

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