In the thread cutting common fault

When using the wire cutting mold, the wire cutting is the last step, so the processing precision is very demanding. If the mechanical precision of the wire moving machine is not good, it will directly affect the processing quality of the product and the mold, and eventually lead to loss. Users, lose the market, so in the medium wire cutting machine selection, how to determine and measure the speed of wire cutting machine precision and structure, the merits and demerits is very important, then come to a simple explanation;
In general, the new middle wire cutting accuracy is easy to judge, because there is the national standard GB7926-2005 and the related universal standard of the precision of the wire-cutting machine tool, so the user can know whether it is qualified or not when they buy a new mid-wire machine tool for debugging and acceptance. However, the most important thing is to judge the accuracy of the wire-moving machine tool because the accuracy of the wire-moving machine tool is only reflected in the use of the wire-cutting machine after a certain period of time, and the national standard cannot Its strict quantitative control, so users can only be in the selection of the type of wire cutting machine and structure of wire-cutting machine in-depth understanding, must not hear hearsay, listen to some unfounded rumors, so as not to disturb your judgment Force affects your processing schedule.
The use of EDM to eliminate the remaining R angle after machining is a relatively rare type of machining, called "clear angle machining." During this type of processing, due to the small area of partial discharge and the large depth of processing, the occurrence of unstable discharges during processing and in the middle often occurs, the electrode feed is repeatedly retreated, and then the processing speed is slow, the electrode loss is large, and the appearance Problems such as unequal roughness can not be satisfied with the processing request, and even the situation where it is difficult to realize processing. Adopting electrode oblique machining is a better way to deal with this problem.
When adopting the oblique machining method, the middle wire cutting should carefully analyze the processing parts. For example, if the processing part has contradictions and reverse inclinations that are inconsistent with the feeding direction, the oblique processing method cannot be applied under these conditions. It will change the appearance of processing. After confirming that the oblique machining method can be applied, two-axis linkage or three-axis linkage can be selected according to the requirements, which depends on the shape of the processing part and the level of decline in each direction. In the machinable state, we are able to apply the three-axis linkage method in an individualized manner, because it has better evacuation results, and a more stable and more complete machining process.
The slantwise feed path for oblique machining is formed by the connection of a starting position and ending position defined at the time of spinning. The end position is fixed, that is, the final status of the processing feed. The beginning position can be freely defined in the programming. The sloping approach to processing should have a positive angular value, which requires that the starting position be defined based on the location of the actual process. To ensure that starting from the beginning of processing, processing center will not interfere with the rest of the workpiece processing sites. The coordinates of the absolute end positions of the coordinate values added and processed in the beginning position should be set slightly farther. This can ensure a certain gap between the electrode and the sound of the workpiece in the machining and ensure the chip evacuation results. However, it should not be set too far. This would make the empty machining process at the beginning of the machining process too long, and it would spoil the processing time.
Adopt oblique machining method. When the power saving parameter of the conditioner is adjusted, the height of the lifting knife should be set to a larger value (more than twice of the normal processing). Therefore, the height of the lifting knife is the length of the diagonal path, and the electrode is absolute. The interval between missions is much smaller. For example, if the height of the knife is not set large enough, the inspection of the knife inspected during processing is very small. In addition, the discharge time should be set shorter and the speed of the knife should be set faster. some.