Stripper maintenance The removal of the stripper plate […]
The removal of the stripper plate can be first lifted with two screwdrivers, and then balanced with both hands to remove the force. In case of difficulty in disassembly, it should be checked whether the mould is cleaned, whether the locking screws are completely disassembled, whether the mould is damaged by the card, and the cause should be determined accordingly, and must not be disposed of blindly. When assembling the stripper, clean the punch and stripper first, add the lubricant to the lead of the guide post and the punch, place it smoothly, press it in place with both hands, and repeat it several times. If it is too tight, the cause should be ascertained (whether the guide column and guide bushing are normal, whether there is damage in each part, whether the new punch can be smoothly passed the correct position of the stripper), and the cause is determined accordingly. If the fixing plate has a pressing block, check if the position on the stripping backing plate is sufficient. The material contact surface between the stripping plate and the die is pressed for a long time to produce an indentation. When the indentation is severe, the pressing precision of the material is affected, resulting in abnormally unstable product size, etc., and the stripping and stripping plates are required. Repair or regrind. The contour sleeve should be checked for accuracy. If it is not equal, it will cause the stripper to tilt, and its precision guiding smooth spring pressure function will be destroyed and must be maintained.
Guided area inspection
How to match the gap between the guide post and the guide sleeve, whether there is burn or wear marks, and whether the mould-oriented oil supply status is normal, it should be checked. The wear and precision of the guides reduce the accuracy of the mould, and problems occur in various parts of the mould. It must be properly maintained and replaced regularly. Check the accuracy of the guide member. If the guide pin is worn, the proper tape guide accuracy and function have been lost and must be replaced. Check the condition of the stripping spring and the top spring to see if it is broken or not broken for a long time, but it has lost its original strength due to fatigue. It must be regularly maintained and replaced, otherwise it will cause damage to the mould or production will not be smooth.
mould gap adjustment
The core positioning hole is worn due to the frequent combination of the core, resulting in a large gap after assembly (looseness after assembly) or uneven gap (producing positioning deviation), which will cause the shape of the section after punching to deteriorate. The mould is easy to break, and burrs are generated. The condition of the cross-section after punching can be checked to make appropriate gap adjustment. When the gap is small, the cross section is small. When the gap is large, the cross section is large and the burrs are large. The reasonable gap is obtained by shifting. After the adjustment, the appropriate record should be made, and the mark can be marked on the side of the die so that Subsequent maintenance work. Daily production should pay attention to the collection of the material when the original mould is better. If the subsequent production is not smooth or the mould is mutated, it can be used as a reference for mould maintenance. In addition, if the auxiliary system such as the top pin is worn, whether it can be topped, whether the guide pin and the bushing are worn, it should be inspected and maintained.