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...
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 o...
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 o...
The effect of coating thickness on surface and internal quality is the result of different coating thicknesses treated with different powers. Under the condition of constant coating thickness, the change of power has little effect on the quality of the cladding layer. When the power is the same, the surface quality and internal quality of the cladding layer will change greatly when the thickness of the coating is changed. When the power is in the range of 1.8kW～2.0kW and the coating thickness is 1mm～2mm, a good cladding layer can be obtained.
When the coating thickness is 3mm, continue to increase the laser power to change the quality of the cladding layer. However, in actual work, the power of the equipment cannot be increased indefinitely, and the thickness of the coating is not as thick as possible according to the working characteristics of the valve. In actual production, it should also be considered that after laser cladding, post-grinding should be carried out. Therefore, the appropriate thickness of the exhaust valve laser cladding coating is 2mm, which can not only meet the working conditions of the valve, but also ensure the stability of the process.
The influence of adhesive on the quality of the cladding layer During the pre-coating process of the valve, the adhesive has a significant influence on the quality of the cladding layer. The adhesive should firstly ensure good bonding performance and certain high temperature resistance, and there should be no splashing and peeling during the heating process. The adhesive must also be easy to volatilize, does not damage the performance of the cladding layer, is conducive to the formation of the cladding layer, and does not contain moisture.
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