1. The effect of wire cutting machine tools on wire breaking:

 

The silk thread cutting machine is mainly composed of the silk storage barrel, the wire frame and the guide wheel. When the precision of the wire mechanism is reduced (mainly the drive bearing), it will cause the radial runout and the axial movement of the silk cylinder.

 

The radial pulsation of the silk drum will reduce the tension of the wire and cause the filaments to be loosed, and the molybdenum wire will be pulled out and broken from the guide slot. The axial movement of the silk cylinder will cause the unevenness of the wire and the phenomenon of superposition. The shaft and bearing parts of the wire storage often cause clearance due to wear, and it is also easy to cause wire jitter and wire breaking. Therefore, parts such as shaft and bearing must be changed in time. When the cartridge tube is reversing, if the high frequency power is not cut off, it will lead to the high temperature of molybdenum wire in a short time and burn the molybdenum wire. Therefore, we must check whether the trip switch of the rear end of the storage tube is out of order. It is necessary to keep the silk cylinder and guide wheel flexibly, otherwise it will cause the vibration of the wire system and broken wire in the return movement.

 

After winding the wire to check whether the molybdenum wire is jitter, if the jitter should be analyzed. The limit block of the back end of the silk cylinder must be adjusted so as to avoid the silk cylinder to break out of the limit stroke and break the wire. Wire retaining device retaining molybdenum wire contact, friction block and fast motion, easy to produce trench and cause wire breaking, therefore also need timely replacement.

 

The wear of guide wheel bearing will directly affect the accuracy of wire guide. In addition, when the grooves of V grooves, jewel limiting blocks and wear blocks of the guide wheel are worn, the friction force of the wire will be too large, and the molybdenum wire will be broken easily.

 

This phenomenon usually occurs when the machine tool is used for a long time, the workpiece is thicker and the wire mechanism is not easy to clean up. Therefore, in the use of the medium wire cutting machine, the precision of the wire mechanism should be checked regularly, and the easy to wear parts should be replaced in time.

 

Two. How to measure the machining precision of the wire cutting machine tool:

 

Users use the WEDM mold processing, in WEDM for the final process, so the high processing precision, if go mechanical precision machine tool processing is not good, will directly affect the quality of products and mould, eventually led to the loss of users, lose the market, so in WEDM the selection, how to judge and measure in WEDM machine tool structure, precision and quality is very important, then to the simple explanation of;

 

Generally speaking the WEDM precision easy to judge, because of GB GB7926-2005 and related standard wire cutting machine precision, so the user to buy a new wire machine test collection can know whether or not qualified; however, the most important is to take the wire machine to maintain accuracy of judgment because, in the feeding machine tool precision to maintain the quality of the wire cutting machine only after a period of use will be reflected, and the national standard is unable to carry on the strict control of the quantitative, so only the users themselves in the selection of WEDM and structure of in-depth understanding, must not be hearsay, Piantingpianxin some unfounded rumors, so as not to disturb your judgment, affect your processing time.

 

Three. The main function of the guide is in the processing technology of the medium wire cutting machine.

 

As everyone knows LWEDM upper and lower guide guide wire are equipped with stones in the mouth, and the key to improve the precision. Because the LSWEDM machine speed is very slow, and the wire material is copper, low hardness, so the wire electrode to guide the wear, also due to copper stress is very small, so the electrode wire is straightened convenient, artificial (or automatic) through the guide is very easy.

 

But the medium wire cutting machine tool is different, because the electrode wire is molybdenum wire, its hardness and stress are far greater than copper wire. When molybdenum wire is observed under a microscope, there are a lot of "nodulation" on the surface of molybdenum wire. When the molybdenum wire is running at high speed, it is no different from the "wire saw" for the guide. So compared with the slow wire, the wear of the guide is very large, and it is difficult to coincide with the molybdenum wire between the guide hole and the upper and lower leading wheels when the guide is installed. This not only speeds up the wear of the guide, but also directly affects the space position of the molybdenum wire in cutting.

 

It is very fatal for the position precision of the die processing and the accuracy of the same parts of the same EDM machine. In addition due to the great stress of molybdenum wire, and the pore can guide than molybdenum wire diameter 0.01mm (or no guide), and guide and molybdenum wire bonding with the working fluid, so the operator should put the molybdenum wire through the hole is very difficult, the operator's patience is huge test. From the perspective of practical application, most of the customers have finally abandoned the application of the guide. Therefore, for the medium thread cutting machine, the application of guide is not the key to improve accuracy and finish. You are always welcome to call for consultation at any time.

 

The above information for wire cutting machine to provide you the hope to help to you, if you have other questions or want to know more information please contact us! We will be the first time for your service, welcome Call Advisory: http:// www.jr-cnc.com.