What are the factors affecting wire cutting machining
The roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better than those of the fast-moving wire cutting. Therefore, when machining high-precision parts, the slow-moving wire cutting is widely used in prod
The roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better than those of the fast-moving wire cutting. Therefore, when machining high-precision parts, the slow-moving wire cutting is widely used in production. However, in the production process, slow-moving wire cutting will also be affected by some external factors. Let's introduce in detail below, what are the factors that affect wire cutting?
1. Reasonable arrangement of the cutting route of slow-moving wire
This guidance method tries to avoid destroying the original internal stress balance of the workpiece material, preventing the workpiece from being significantly deformed due to the action of the fixture during the cutting process, resulting in an unreasonable cutting route arrangement, and avoiding the quality of the cutting surface.
2, the fixation of the workpiece
After the cutting is completed, the connection strength of the processed workpiece with the raw material will decrease. At this time, attention should be paid to avoid the deflection of the processed workpiece due to the impact of the machining fluid. Once deflection occurs, it will cause the cutting gap to change, which will affect the surface quality of the workpiece, and will cause the workpiece to be cut and scrapped. Therefore, it is very important to fix the workpiece.
3. The principle of small quantity and many times is implemented in the machining process
In the process of machining, the machining volume is generally determined by the machining parameters of the machine tool. According to the previous machining experience, except for the first machining, the machining volume generally decreases from tens of micrometers to several micrometers, especially the last time. Should be reduced, the more the number of machining, the better the surface quality of the workpiece. Because reducing the deformation of the material during the wire cutting process can improve the surface quality of the workpiece, a small amount and multiple cutting methods are adopted.
A certain margin can be left during rough machining or semi-finishing, so as to compensate the machining allowance required for the last finishing machining caused by the destruction of the original stress balance of the material.
4, choose the cutting parameters correctly
For different roughing and finishing, the cutting parameters should be adjusted to a certain extent, including: wire speed, wire tension and jet pressure, etc. In order to ensure that the processed workpiece has higher precision and surface quality, appropriately increasing the wire speed and wire tension of the wire cutting machine will have a good effect. Although some machinery and equipment have certain matching parameters for cutting conditions, due to the material of the workpiece, the required machining accuracy and other factors, the operator needs to adjust the parameters according to the actual situation.
5. Adopt distance close machining
In order to achieve high precision and high surface quality of the workpiece, close machining can be used in actual production to make the distance between the upper nozzle and the workpiece as close as possible. In this way, it can be avoided that the surface quality of the workpiece is affected by the distance between the nozzle and the workpiece.