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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

Spring Design Attention And Roll Forming Method

Spring Design Attention And Roll Forming Method The coiling characteristics and methods of springs are divided into cold coiling method and hot coiling method. Cold winding method: When the diameter of the spring wire is less than 8mm, the cold winding method is adopted. High-quality carbon spring steel wire is usually first cold drawn and then heat treated. After winding, it is generally not quenched, but only tempered at low temperature to eliminate the internal stress during winding. Hot-rolling method: Springs with larger diameter (>8mm) spring wire should use hot-rolling method. Hot rolled springs must be quenched and tempered at medium temperature. The Design Process Of Various Springs ·          Installation space: When designing a  compression spring , it is necessary to have a clear understanding of the space required for the installation of the spring, in order to effectively grasp the basic manufacturing conditions of the compression spring, including the outer diam

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

Adopt post-treatment devices such as denitrification catalytic converter and particulate trap


How will the diesel engine oil requirements be tested in PC-10? Compared with the United States, Europe's diesel engine emission standards lag about two years, compared with European, United States, and Japan emission standards. Europe implemented the European emission standard in 1992 and implemented the European ó emission standard in 2000. Some changes have been made in the structure of diesel engines. Although the power is mainly increased, the emissions are not as close as the United States, but in order to reduce nitrogen oxides and reduce particulates. Emissions have taken measures such as delaying ignition and raising the top ring, which has gradually increased the amount of soot in the oil. Of course, improving power, adopting turbocharging, intercooling and complex electronic equipment is still the focus of improvement.

The response of European diesel engine manufacturers is not the same as that of the United States to adopt exhaust gas recycling. Of course, everyone considers diesel high-pressure injection and common rail, but other measures to improve emissions have their own considerations. Some use EGR (exhaust gas recirculation), so that the oil products are closer to the PC-9 in the United States, but some major automakers such as Mercedes-Benz do not use EGR, and use deoxidizing catalytic converters and particulate traps. The processing device will use low-S fuel and low-sulfur, low-phosphorus and low-ash lubricating oil, so how to develop it has to be tested. The development of Japanese diesel engine oil Japanese diesel engine oil mainly considers the characteristics of Japanese diesel engines, such as having an external filter device, which has not been linked to emissions for a long time. At present, 70% of them still use CD+ oil. Of course, Japan's emission requirements have always been much looser than those of Europe and the United States. It was not until 1998 that new specifications were considered to reduce nitrogen oxides and increase soot handling capacity.

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