Jinan mold is now widely used! However, the technical requirements of mold processing are also very important. Today, Jinan Hongjie Mold Co., Ltd. will take you to know what skills are needed in the technology of mold precision EDM?
1. Premise of precision EDM
For EDM of 0 pieces of high value-added mould, it is difficult to put the motor bed in order to be competent to complete, so the selection of high-precision EDM machine is the premise. The mechanical properties of the structure, the geometric accuracy of the spindle and the worktable of the precision EDM machine tool should meet the requirements of high precision. The full closed-loop control mode of high-precision grating ruler can obtain high automatic positioning accuracy. The performance of pulse power supply of machine tool determines the performance of EDM. If the size and contour of the machine tool are to be fine, the discharge gap is required to be very small. Under the condition of small gap machining, stable machining can be realized, and the state of each discharge pulse can be monitored automatically to ensure that the bad good pulse does not have destructive effect. High speed knife lifting technology can effectively discharge the processing waste and tar, and obtain a stable discharge gap.
2. Process method of precision EDM
The precision EDM adopts the technology of multi electricity and machining. According to the different characteristics of the discharge gap in the rough, semi-fine and finish machining of the machining parts, several scaling quantities of corresponding dimensions are used to finish the rough, semi-fine and finish machining of a cavity.
Because of the small rolling momentum, it still has a high profiling accuracy, and the rolling machining makes the discharge stable, which can obtain the surface roughness of the side and the bottom, which is widely used. In the precision machining, it is necessary to use more than one electromotor. As long as the positive and repeated positioning accuracy is maintained, satisfactory process efficiency can be achieved.
3. Method to ensure the positioning accuracy of precision machining
In order to ensure positive and high repetitive positioning accuracy, and to keep low machining efficiency, precise EDM adopts the positioning system of fast clamping, such as GF machining scheme 3R fast clamping. When using this kind of fixture, as long as the accuracy is adjusted before matching, the repeated positioning accuracy can be up to ± 2 μ m in the process of machining, and the electric and workpiece can be changed quickly. Before machining, use the reference ball tool of the center dividing, and use the automatic center dividing function of the CNC EDM machine tool to complete the positioning of the zero point of the main axis chuck and the workpiece center.
4. Requirements of precision machining on electricity and
Electric materials are a key problem in precision machining. Copper is widely used in the field of electrical processing and materials, which can meet the requirements of high-precision machining. However, in order to reduce electrical and loss, reduce electrical and quantity, improve machining surface quality, and achieve high and stable machining, we should consider the selection of expensive copper tungsten alloy electrical and materials. Before being used in EDM, the size and shape shall be measured in detail, and only after passing the full face test can it be used for machining. In the actual production and processing, there are many cases of scrap due to the problems of electricity and disqualification. Therefore, it is important to pay attention to the manufacturing of electricity and precision machining.
5. Control of electric gauge in precision machining
In general, the control method of high-grade machine tool electric gauge used in precision machining is intelligent energy control. In the process of machining, the gap state of EDM is monitored and judged by computer, and the machining condition of high machining efficiency is automatically selected within the range of keeping stable arc.
The above is the introduction of precision EDM technology by Jinan Hongjie mould Co., Ltd! I hope I can help you. For more information, please click