WEDM Guide Wheels Affecting the Surface Roughness of Middle Wire Cutting
Release time:
2024-01-25
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A wire cutting machine is sent to the user, the "processing performance" of the machine tool is basically finalized, and the structure of the molybdenum wire positioning "guide system" guide wheel assembly determines the quality of the wire cutting surface to a certain extent. Analyzing the working principle and working environment of the guide wheel assembly can help us makewire cutting machineTo maintain a good state of surface roughness has the actual value of participation.
Let's start with the structure of the guide wheel assembly. Whether it is fast wire or middle wire modified on the basis of fast wire structure, the guide wheel assembly is divided into two parts: "main wheel assembly" and "auxiliary guide wheel assembly. They are composed of the following main components: guide wheel sleeve, guide wheel, bearing, envelope, nut.
We know: in the work of the guide shaft and the bearing inner ring together for high-speed operation, can reach thousands of revolutions per minute. In particular, the processing environment of fast wire and medium wire can be said to be a mixture of dissolved substances of impurities produced after various discharges, which have a great influence on the bearings that play a major role in the positioning of the guide wheel. It can be said to be the factor that determines the "life and death" of the guide wheel assembly.
Select environmentally friendly water-soluble BM series water-based working fluid (BM-2,BM-4,BM-1), the use of the process will not produce black attachments, can effectively reduce the wear of the guide wheel, extend the life of the guide wheel.
Although the auxiliary guide wheel assembly does not play a decisive role in the "positioning" of the molybdenum wire, it is the key to ensure the smooth running of the wire in the whole wire system. The tension system of the middle wire is more "restrained" by the guide wheel assembly ". Shown in the processing of non-discharge factors of broken wire, processing surface "jumper trace", wire tube reverse trace and so on.
The "absolute positioning" coordinates of our molybdenum wire in the processing area are positioned by the guide wheel assembly on the end of the upper and lower wire arms. The processing trajectory sent by the control system is the "position signal" of the molybdenum wire relative to the machine table, and the theoretically calculated processing trajectory is "zero deviation". The guide wheel assembly in the actual work to affect the molybdenum wire, so that the actual molybdenum wire trajectory along the guide wheel fixed position in the guide wheel installation of the axial and radial "dynamic" to do displacement movement. This is an important reason for the final result of the wire cutting surface roughness, especially in the middle wire, this "dynamic" displacement affects the effect of multiple cuts from many aspects-that is, surface roughness.
According to the patent introduction of the "waterproof guide wheel" of the invention, the device includes a guide wheel, a guide wheel shaft, a bearing, and a composite seat. It is characterized in that an annular groove is provided along the axial direction at the end of the large shaft of the guide wheel. The small shaft of the inner guide wheel is also provided with an annular groove along the radial direction, and an annular boss is provided at the adjacent end of the composite seat and the guide wheel to form a matching gap with the annular groove. When the machine tool is working, the splashed working fluid will enter the annular groove along the boss, and then flow out from the lower part along the annular groove, and will not enter the bearing, which effectively protects the bearing and improves the working accuracy of the guide wheel device And service life.
The aluminum alloy guide wheel with ceramic surface is made of composite materials. The inertia of aluminum alloy is small, and the surface of the guide wheel is plated with a layer of ceramic, and the wear resistance of ceramic is used. The structure of the guide wheel to give full play to the achievements of high technology, to meet the practical application needs of the guide wheel.
According to the introduction of the patent. A layer of aluminum oxide ceramic oxide film is grown in situ on the overall surface of the aluminum alloy guide wheel by micro-arc oxidation process. The surface hardness of the ceramic aluminum alloy guide wheel is Hv1300 ~ Hv1800. This surface ceramic aluminum alloy guide wheel has high hardness, friction and wear resistance, high insulation strength and acid and alkali corrosion resistance, very suitable for electric spark wire cutting guide wheel working conditions.
There is also a new type of "axial electric guide wheel", which is suitable for cutting aluminum and aluminum alloy workpieces, and solves the problem that the wire cutting machine tool cuts the conductive block. The efficiency of cutting aluminum parts is also greatly improved.
The above is aboutmiddle threadWire cutting guide wheel type and selection of the relevant analysis, hoping to give you help and inspiration.
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