Aluminum extrusion die EDM operating guidelines

【China Aluminum Industry Network】 1. Before EDM, carefully understand the processing technology and technical requirements of the product drawings and strictly follow the drawings.

2. Before the operation, check whether the processing equipment and the CNC system are operating normally, and whether the tooling tools, measuring tools, and inspection tools are in good condition to meet the process requirements. The electrodes must be checked before machining, and they can be machined without errors.

3, EDM hollow tool position deviation: end surface ≤ 100? Symmetrical tolerance ? ± 0.1? End face 100 ≥ symmetrical tolerance ? ± 0.2?

4. The deviation of the working point from the high and low points: J is lower than ±0.1?, the higher point is ±0.3?, and the excessive bit is ±0.3?.

5, the upper mold core slot, screw hole, the middle horizontal than the lower die welding room work zone higher 0.3 ~ 0.5?.

6. If there is no over-position R2 in the adjacent work zone, no sharp corners are allowed.

7, the conventional mold slot, screw hole, nail position, etc. for the length of the sink: welding room 10? = h supply tank 8?; 15? = h supply tank 10 ~ 13?; 20? ≥= h, supply tank ≤ 20 Drainage trough width unilateral ≥ 1.5?, depth 2.5? ≥, symmetry ± 0.3?. The special porous complex molds are processed according to the figure or on-site guided by the relevant personnel, and they must not be processed arbitrarily.

8, EDM roughing shall not exceed 50c per minute, finishing shall not exceed 20c per minute, the appearance of the workpiece after the lower die is finished, there is no rough electrode discharge trace, after the core core finishes, the roughness of the processing surface reaches 12.5 ?m

9, special radiator profile EDM can not exceed 20c per minute, finishing can not exceed 10c per minute.

10, when the upper mold finishes the work and the height difference between the high and low points exceeds 5, the high and low point working belt (knife above) must be processed.

11, the lower die, flat die milling electrode excessive chamfer R1 ~ R2, EDM must be rounded after excessive, can not stay sharp.

12. The upper and lower molds that are well-finished must be self-inspected and cannot be reworked in time. The processing of the poor quality can be reported to the quality inspector in time.