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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 better t

Classification of CNC Machining Occupation Levels

1. Blue-collar layer:   That is, CNC machining operation technicians, proficient in machining and CNC machining process knowledge, proficient in the operation and manual programming of CNC machine tools (attributes: automated machine tools), understand automatic programming and simple maintenance of CNC machine tools (attributes: automated machine tools), such There is a large market demand for personnel, and they are suitable for operating workers of CNC machine tools (attributes: automated machine tools) in the workshop, but due to their single knowledge, their wages will not be much higher.   2. Gray collar layer:   One, CNC machining programmer:   Master the knowledge of 5 Axis CNC machining Aluminum   technology and the operation of CNC machine tools (attributes: automated machine tools), be familiar with the design and manufacturing expertise of complex molds (title: mother of industry), and be proficient in 3D CAD/CAM software, such as UG, GOOGLE PRO/E, etc. ; Familiar with CNC

Hydrostatic guideway of CNC machining lathe

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

Use gasoline engine fuel direct injection technology, use computer to control air-fuel ratio

 

Current research status of gasoline engine oil at home and abroad. To meet the needs of automobile emission performance, the technology to control automobile exhaust emissions can only control the emissions of gasoline engines within the scope of increasingly stringent regulations by combining in-flight purification and external purification. The external purification** is a three-way catalytic converter. It requires re-adjusting the formula of engine oil to control the phosphorus content, reduce catalyst poisoning, and extend the service life of the catalytic converter. To meet the needs of automobile fuel economy, in addition to improving the anti-friction properties of engine oils, low-viscosity grades of multi-grade oils should also be vigorously developed to improve energy-saving effects. But the viscosity is low, the engine oil consumption increases, the engine oil is easy to volatilize and cause abrasion. This requires the base oil to be light, and the evaporation loss is small, the high temperature and high shear viscosity cannot be too small, and the oxidation stability is better. Meet the need for longer and longer oil change periods.

In order to adapt to the improvement of thermal efficiency, specific power and other power performance, the main measures are to adopt gasoline engine fuel direct injection technology, and use computer to control air-fuel ratio, so that combustion is complete, emissions are improved, and the pulse boosting technology with high charging efficiency is also in electronically controlled direct injection gasoline engines. It can be applied to the gasoline engine, which unifies the power, emission and economy of the gasoline engine. However, this also increases the temperature of gasoline engine combustion chambers and other parts, and causes many problems such as high temperature deposition, high temperature oxidation resistance, high temperature detergency and high temperature wear. European gasoline cars have higher requirements for the quality of lubricating oil than American gasoline cars, forming a unified European social refueling minimum quality gasoline engine oil specification, which is suitable for various vehicles used in Europe. Automobile manufacturing companies can add some additional assessment items on this basis. A number of the company's assessment projects have formulated the company's ex-factory refueling and oil specifications, but the corporate standards must be higher than the European unified standards. Simulation performance test European countries have paid more attention to simulation performance test. The following test items are set in the standard: high temperature and high shear viscosity. Regarding the simulation performance test, only the -> grade oil specification began to pay attention, and the European standards have always paid more attention.

The 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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