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Maintenance essentials of stamping continuous die

by:Fortuna     2021-03-05
The maintenance of the continuous mold must be done carefully and patiently step by step, and must not be blindly engaged. When repairing the mold due to failure, a material belt must be attached to facilitate the inquiry of the problem. Open the mold, check the condition of the mold against the material belt, confirm the cause of the failure, find out the problem, and then clean the mold before removing the mold. When removing the mold, the force must be uniform. For the mold structure where the stripping spring is between the fixed plate and the stripping plate and the stripping spring is directly on the inner guide column, the stripping plate should be removed to ensure that the stripping plate is balanced and ejected. The inclination of the stripper may cause the punch in the mold to break. 1. Maintenance of convex and concave molds When disassembling the convex and concave molds, pay attention to the original condition of the mold, so that it can be easily restored during subsequent mold assembly. If there is a pad or shift, the thickness of the gasket should be engraved on the part and done well. recording. To replace the punch, try to insert the stripping block and the die to see if it is smooth, and try to see if the gap between the insert and the die is even, and if the gap between the die and the punch is even when replacing the die, you must also try to see if the gap between the insert and the punch is even. In view of the shortening of the punch after grinding the punch, it is necessary to add gaskets to reach the required length, and check whether the effective length of the punch is sufficient. 2. The maintenance of the stripper board. The stripper can be lifted up with two screwdrivers first, and then use both hands to balance the force to take it out. When it is difficult to disassemble, check whether the inside of the mold is cleaned, whether the locking screws are completely disassembled, whether the mold is damaged due to jamming, find out the reason and then do the corresponding treatment, and do not blindly dispose of it. When assembling the stripper plate, first clean the punch and stripper plate, add lubricating oil to the guide post and the punch guide, put it smoothly, and then press it in place with both hands, and repeat it several times. If it is too tight, find out the reason (whether the guide post and guide sleeve are oriented normally, whether there are damages in various parts, whether the new punch can go smoothly, whether the position of the stripper plate is correct) find out the reason and then do the corresponding treatment. 3. Inspection of the guiding position. Check the clearance between the guide post and the guide sleeve, whether there are burns or wear marks, and whether the oil supply state of the mold guide is normal. The wear of the guides and the destruction of precision reduce the precision of the mold, and various parts of the mold will have problems. Proper maintenance and regular replacement must be done. Check the accuracy of the material guide. If the guide pin is worn out, it has lost the proper accuracy and function of the tape guide and must be replaced. Check the condition of the ejection spring and the ejector spring to see if it is broken or if it has not been broken after long-term use, it has been fatigued and has lost its original strength. Regular maintenance and replacement must be done, otherwise it will cause damage to the mold or unsmooth production. 4. Adjustment of the mold gap The mold core positioning hole is worn out due to frequent and multiple combinations of the mold cores, resulting in large gaps after assembly (looseness after assembly) or uneven gaps (producing positioning deviations), which will cause punching. If the cross-sectional shape is deteriorated, the punch is easy to break, burrs, etc., you can check the cross-sectional condition after punching to make proper gap adjustments. When the gap is small, the section is less. When the gap is large, the section is more and the burr is larger. A reasonable gap can be obtained by shifting. After adjustment, it should be recorded properly. Marks can also be made on the side of the die to facilitate Follow-up maintenance operations. Recommended article: Several structural forms of commonly used bending dies and their respective characteristics Previous post: Research on the surface strain problems and preventive measures of drawing dies
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