1. Waste material jumping hole
1) The length of the punch is not enough. Cut into the die according to the edge of the punch and add 1 mm to the material thickness to replace the punch.
2) The gap between the die and die is too large. Cut the gap into small pieces or use a coating machine to reduce the gap.
3) The punch or template has not been demagnetized. Use a demagnetizer to demagnetize the punch or template.
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2. Waste material blocks the hole
1) The blanking hole is small or the blanking hole is offset and the blanking hole is enlarged to make the blanking smooth.
2) The blanking hole is chamfered. Enlarge the blanking hole to remove the chamfer.
3) The knife edge is not tapered, and the wire cutting taper or the expansion hole on the back reduces the length of the straight wall.
4) The straight wall of the knife edge is too long. Drill holes on the reverse side to shorten the straight wall of the knife edge.
5) The cutting edge collapses, resulting in a large blade, and the cutting edge needs to be blocked and re-grinded.
3. Poor blade wear
1) The blade collapses, causing the blade to be too large and the blade needs to be ground again.
2) The gap between the punch and the die is too large, the wire is cut into the block, and the gap must be readjusted.
3) The finish of the die blade is poor, and the polished blade has a straight wall position
4) The gap between the punch and the die is too small. Save the mold again and adjust the gap.
5) The ejection force is too large. Pull out the cape in the opposite direction and replace the spring to reduce the ejection force.
4. Uneven trimming
1) Positioning offset adjustment
2) There is single-sided molding, pull the material to increase the pressing force, and adjust the positioning
3) Design error, resulting in uneven knife connection and re-cutting the cutting edge insert
4) Feeding is not allowed to adjust the feeder
5) The feeding step distance calculation is incorrect. Recalculate the step distance and reset the tool receiving position.
5. The punch is easy to break
1) The closing height is too low and the punch cutting edge is too long. Adjust the closing height.
2) The material is improperly positioned, causing the punch to cut one side, and the positioning may be adjusted or the feeding device may break due to uneven stress.
3) The lower die waste blocks the cutting edge, causing the punch to break. Drill a large blanking hole to make the blanking smooth.
4) The fixed part (clamp) of the punch and the guide part are repaired or re-cut into blocks to make the punch move smoothly up and down (plate-making).
5) The plate-making guide is poor, causing the punch to be stressed on one side. Re-adjust the plate-making gap.
6) The punch blade is too short and it interferes with the plate making. Replace the punch and increase the length of the blade.
7) The punch is not fixed well and it moves up and down. Re-fix the punch so that it cannot move up and down.
8) The punch edge is not sharp and needs to be reground.
9) The surface of the punch is strained and the force is uneven during stripping. Replace the punch.
10) The punch is too thin, too long, and not strong enough. Change the punch type again.
11) The punch hardness is too high and the punch material is wrong. Replace the punch material and adjust the heat treatment hardness.
6. Iron filings
1) Recalculate the position of the pressure bead or the bending position if the pressure bead is misaligned
2) The bending gap is too small. Extrude iron chips to readjust the gap, or grind the forming block or grinding forming punch.
3) The bending punch is too sharp and the R angle is trimmed
4) There is too little material to connect the knife edge and reconnect the knife edge.
5) The bead is too narrow. Grind the bead again.
7. Poor sprouting
1) The center of the bottom hole does not coincide with the center of the punch. Determine the correct center position, or move the punch position, or move it to a higher-side-lower position, or even move the pre-punching position, or adjust the positioning.
2) The gap between the concave molds is uneven, causing the sprouting-side height-side trimming gap to be low or even broken.
3) The bottom hole of the sprout does not meet the requirements, causing the height of the sprout and the diameter of the bottom hole to be recalculated, and the diameter deviation of the pre-punched hole increases or decreases, or even breaks.
8. Poor molding
1) The punch of the molding die is too sharp, causing the material to crack. Repair the R-angle of the molding punch. Repair the R-angle of the knife edge appropriately.
2) The length of the forming punch is not enough, resulting in failure to form. Calculate the correct length of the punch and adjust the actual length of the punch to meet the molding requirements.
3) The forming punch is too long, and the material at the forming area is deformed due to pressure. Determine the correct length of the punch, and adjust the actual length of the punch to meet the requirements until the punch breaks.
4) Insufficient material at the molding area causes cracking. Calculate unfolding the material, or trim the R angle, or reduce the molding height.
5) Poor positioning, resulting in poor molding. Adjust the positioning or feeding device.
6) The molding gap is too small, causing cracking or deformation of the adjustment gap.
9. Bending size
1) The mold is not adjusted in place, causing angle errors, resulting in dimensional deviation, poor closing height or poor angle difference.
2) Insufficient elasticity causes poor angle, resulting in size deviation. Replace the spring.
3) The material does not meet the requirements, resulting in poor angles, resulting in size changes to materials or readjustment of gap deviations.
4) Material thickness deviation causes poor angle, resulting in dimensional deviation. Determine the material thickness. Change the material or readjust the gap difference.
5) Improper positioning leads to size deviation. Adjust the positioning to make the size OK.
6) Design or processing errors result in repair welding and grinding between the male bending pieces, eliminating the gaps between the pieces, resulting in small bending dimensions.
7) The molding has no R angle, and the bending height is too small under the angle and other normal conditions of the molding R angle.
8) The bending size on both sides is too large for the compression ribs
9) One-sided bending and pulling of materials causes dimensional instability. Increase the spring force and adjust the positioning.
10) The gap is unreasonable, causing bad angles and size deviations. Repair the gap
11) The height of the folding knife is not enough, and the bending punch is too short to fit into the folding knife. Increase the height of the folding knife so that the bending punch fits into the folding knife position as much as possible, resulting in more bad angles.
12) The speed is too fast when bending, causing deformation of the bending root. Adjust the speed ratio control and select a reasonable speed.
13) The structure is unreasonable. The folding knife is not inserted into the fixed template. The slot is milled again. When the folding knife is inserted into the template for stamping, the gap becomes larger.
14) The hardness of the molding male heat treatment is not enough, causing the pressure line to collapse or the molding male pressure line to be flattened.
10. No unloading
1) Improper positioning or feeding. Adjust the positioning or feeding device.
2) The avoidance position is not enough to repair and grind the avoidance position.
3) The inner guide post is strained, resulting in poor boarding movement. Replace the inner guide post.
4) If the punch is strained or the surface is not smooth, replace the punch.
5) The position of the ejector pin is unreasonable. Rearrange the position of the ejector pin.
6) The ejection force is not enough or the ejection force is not enough. Replace the ejection spring or the ejection spring.
7) The punch and plywood do not cooperate smoothly. Repair the plate and plywood to make the punch cooperate smoothly.
8) The molded slide block does not fit smoothly. Trim the slide block and guide groove to make them fit smoothly.
9) The heat treatment of the plate is not suitable, and it deforms after a period of stamping. Grind the plate again to correct the deformation.
10) The punch is too long or the ejector pin is not long enough. Increase the length of the ejector pin or replace it with a punch of appropriate length.
11) If the punch is broken, replace the punch.
12) The template is not magnetized, and the workpiece is brought upward to the template to demagnetize it.
11. Feeding is not smooth
1) The mold is not set up correctly, causing the material belt, feeder and mold to be re-set the mold or adjust the feeder to not be in the same straight line.
2) If the material belt is uneven, adjust the leveling machine or replace the material.
3) Not unloading causes poor feeding. Please refer to the countermeasures of not unloading.
4) Positioning is too tight. Adjust positioning.
5) The guide pin is too tight or the straight wall is too long. Adjust the guide pin.
6) The punch is not fixed well or is too long and interferes with the material belt. Replace the punch with a suitable length and re-fix it.
7) The ejector pin is too short, and the material belt interferes with the forming block. Adjust the length of the ejector pin to avoid interference.
8) The position of the floating block is improperly arranged. Adjust the position of the floating block.
12. Poor riveting
1) The mold closing height is improper and the riveting is not in place. Adjust the closing height.
2) The workpiece is not placed in place and the positioning deviation is adjusted.
3) If the workpiece is defective before riveting, check the sprouting hole. Refer to the countermeasures to solve the problem of defective sprouting holes and confirm whether the riveting hole is chamfered. If there is no chamfer, add chamfering.
4) If the riveting punch is not long enough, replace it with a punch of suitable length.
5) If the riveting punch does not meet the requirements, confirm and use a riveting punch that meets the requirements.
13. Missing or installing
1) Accidentally make the wrong punch when assembling
2) The punch has no direction mark and the punch with direction is marked.
14. Wrong screws installed
1) Don't know the thickness of the template. Know whether the thickness of the template is too long or too short.
2) Insufficient care and experience in selecting appropriate screws
15. Disassembly and assembly of mold
1) The pin holes are not wiped clean. Wipe the pin holes and pins clean. When disassembling the mold, you should first remove the positioning pins, which are easily damaged. When installing the mold, you should use screws to guide them first, and then drill the positioning pin holes.
2) The mold assembly and disassembly procedure is incorrect. Do not damage the pin hole when knocking off the pin.
16. Positioning pin
1) The hole wall is roughened or scratched, causing the mold to be too tight. When assembling the mold, carefully check whether the pin hole is roughened. Otherwise, the pin hole that cannot be punched out should be reamed.
2) The pin hole is offset or there is no escape hole below. Add an escape hole for the positioning pin.
17. Spring is too long
1) Did not pay attention to the depth of the spring hole. Measure the depth of the spring hole and calculate the compression amount of the spring. If you re-select, you cannot press it down.
2) Insufficient care and experience in determining the appropriate bottom dead center of the spring
