How to care for the progressive die (on)

1. Care of the convex and concave molds When disassembling the convex and concave molds, attention should be paid to the original condition of the mold, so as to facilitate the restoration during subsequent mold assembly. When replacing the punch, you should see whether it passes through the unloading plate smoothly.　　①As the total length of the punch becomes shorter after maintenance, when a gasket needs to be added to reach the required length, check whether the effective length of the punch is sufficient.　　②When using a new punch or die insert, pay attention to the treatment of the corners.　　The inner concave clear angle will have a small R due to the wear of the grinding wheel during grinding. Relative to the convex part, it is also necessary to manually repair the R to make the fit clearance reasonable. Pay more attention to the formed small protrusions. When replacing the broken punch, check the cause, and check whether the punch has caused chipping and whether the cutting edge needs to be ground. Assemble the concave mold, place it horizontally, then place a flat iron block on the mold core and knock it in place with a copper rod. Do not place it at an angle but force it in (if necessary, place it at the bottom corner of the mold core). Pour out R for easy introduction). If the force is uneven during assembly, the spacers added under the die should be flat, generally no more than two pieces (and steel pads should be used as much as possible), otherwise it will easily cause the die to break or form Unstable size (especially bending forming).　　 After the punch and mold core are assembled, check the material tape to see if the parts are incorrectly installed or reversed, check whether the female mold core is flipped, and confirm that it is correct before assembling the discharge plate or clamping the mold. Pay attention to the locking confirmation of the discharge plate screw in order to obtain sufficient locking force.　　Note: When locking, you should lock it from the inside to the outside with a balanced force. Do not lock one screw at a time and then another screw, otherwise the punch will be broken or the accuracy of the mold will be reduced. 2. Adjusting the mold gap. The mold core positioning holes are worn out due to frequent and multiple combinations of the mold cores, resulting in large gaps after assembly (looseness after assembly) or uneven gaps (positioning deviations), which will cause punching. After cutting, the cross-sectional shape becomes worse, the punch is easy to break, and burrs are generated. You can check the cross-sectional condition after punching to make proper gap adjustment. When the gap is small, the cross-section is less. When the gap is large, the cross-section is more and the burrs are larger. A reasonable gap can be obtained by shifting. After adjustment, it should be properly recorded. You can also mark the hole position for subsequent follow-up. Maintenance work.　　Daily production should pay attention to the collection and preservation of the original mold in the best condition. If the subsequent production is not smooth or the mold changes, it can be used as a reference for progressive mold maintenance. In addition, the auxiliary system, such as whether the ejector pin is worn, whether it can eject the material, whether the guide pin and the bushing are worn, should be checked and maintained.