How to cut the taper with wire cutting EDM machine
In principle, the taper of wire EDM machine can be cut accurately. Because when the radius of the guide roller, the center distance of the upper and lower guide rollers, the distance between the lower guide roller and the lower plane, the height and taper angle of the workpiece are input, the mathematical model is made by the similar shape formula in the program, and the upper plane and the lower plane of the workpiece can be calculated. The size of , is accurately converted into the combined motion value of XY and UV, and the step distance with μ as the equivalent can meet the extremely high precision requirements.
However, in actual cutting, there are still many errors that directly affect the accuracy, such as the radius of the guide wheel, the center distance of the guide wheel, and the distance from the lower guide wheel to the lower plane. It is difficult to obtain a very accurate value. Their error value is probably a hundred times thousand times worse than the μ-level accuracy. Causes false numbers in program operation to be true.
Another important reason for the loss of accuracy is that the vertical directions of the upper and lower guide wheels are not in the same position when cutting the taper. At this time, the wire is not positioned at the root of the V-shaped groove of the guide wheel, and the V-shaped surface of the V-shaped groove has interfered with the wire. The initial position of , this is a variable with extremely uncertain factors, this is a variable with an amplitude ranging from several μ to several MM, and this quantity cannot be compensated in any operation. Therefore, on the large-taper wire EDM machine, the follow-up structure of the guide wheel and the UV shaft is adopted, which is also called the connecting rod structure, which solves the problem of the V-shaped surface of the guide wheel interfering with the molybdenum wire. However, due to the complex linkage system and no less than three movable joints, the guide wheel has been carried on the end of a movable shaft body with poor rigidity and long fulcrum and force arm. The overall stability, rigidity and lag of action have all become important factors that affect the cutting accuracy.
Although there are still many insurmountable problems in taper cutting, it is still a powerful function of wire-cut EDM machines, and it is a unique advantage that can despise any machining. It can solve the special problems that no one in the machining industry can do. the problem. The use of the taper function has a proficient process, and the targeted process test and the estimation of the impact of input parameters on the processing results are important experiences for taper cutting. Experimentation and experience can help you cut a tapered part with high precision. The first part may not be satisfactory, but the second or third part is completely sure to get a qualified product. By changing any of the input parameters, such as the center distance of the upper and lower guide wheels or the taper angle, it can directly control the size of the upper plane or the size of the lower plane. Taking the first one as a reference, the second one for correction, and the third one for success is very likely. Such references, corrections, and successes can be made to the point of being handy after a few times. In the end, with our existing machine tools, the control ability of taper cutting, the accuracy that can be achieved is usually around 0.05, which has high applicability and satisfaction for the production of taper parts.
Taiye Machinery was founded in 2005, the company is located in the beautiful Zhejiang, China，Taiye machine provide a full set of professional extrusion die equipment and extrusion dies, We have an aluminum extrusion die factory and a professional extrusion die equipment company in China. Our machine tools product include machining center, CNC lathe, wire cut EDM machine, EDM machine, Vacuum Furnace, etc.
