Common Problems In the Use of Bending Machine Molds

What common problems should be noticed during the use of bending machine molds? 

1.The instructions for the use of bending machine molds are summarized below, and I hope to help you.

a. The length of the punch is not enough. Press the edge of the punch into the die and add 1mm to replace the punch.

b. The die gap is too large. Cut into the child to reduce the gap or use a coater to reduce the gap.

c. The punch or template is not demagnetized. Use a demagnetizer to demagnetize the punch or template.

2.Waste plugging

a.The blanking hole is small or the blanking hole is out of position to increase the blanking hole, so that the blanking is smooth.

b. There is a chamfer in the blanking hole. Increase the blanking hole to remove the chamfer.

c. The knife edge does not put the taper, the taper is cut or the reverse expansion hole reduces the length of the straight wall.

d. The straight edge of the knife edge is too long and the reverse side is drilled to shorten the straight edge of the knife edge.

e. The blade edge collapses, causing the front edge to be large, and the material is blocked to re-grind the edge.

3.Poor front

a. The edge is collapsed, causing the sharp edge to re-grind the edge

b. If the gap between the punch and the die is too large, cut into the block and re-set the gap.

c. Poor finish of the die blade. Polished knife edge.

d. The gap between the punch and the die is too small to save the die, and the gap is equipped.

e. The ejection force is too large.

4.The edges are uneven

a. Positioning offset adjustment positioning

b.Single-side molding, pulling material to increase the pressing force, adjust the positioning

C The design is wrong, causing the uneven knife to re-cut the cutting edge insert

d. Feeding is not allowed to adjust the feeder

e. There is an error in the calculation of the feeding step.

5.Punch breakable

a.The closing height is too low, and the position where the punch cuts into the knife edge is too long to adjust the closing height

b. Improper positioning of the material causes the punching punch to cut a single side, adjust the positioning or the feeding device breaks due to uneven force

c. The lower mold waste blocks the knife edge, causing the punch to break and re-drilling a large blanking hole to make the blanking smooth.

d. The fixed part (plywood) of the punch is fixed with the guide part or re-cut the block to make the punch go up and down smoothly.)

e. The guide of the punching board is not good, which causes the unilateral force of the punch to repair the punching board gap.

f. The blade edge of the punch is too short, and the punch will interfere with the punching plate to replace the punch and increase the length of the blade edge.

g. The punch is not fixed well, re-fix the punch so that it cannot move up and down

h. The cutting edge of the punch is not sharp and regrind the cutting edge

i. The surface of the punch is strained, and the punch is unevenly replaced when the material is unloaded.

j. The punch is too thin, too long, and the strength is not enough.Replace the punch type.

k. The hardness of the punch is too high, the punch material is not correct. Replace the punch material, and adjust the heat treatment hardness.

6.Iron filings

a. Recalculation of crimp position or bending position

b.The bending gap is too small, adjust the gap by extruding iron filings, or grind the forming block, or grind the forming punch

c. The bending punch is too sharp to repair the R angle

d. Press the knife edge material too little to reconnect the knife edge

e. The crimp is too narrow and regrind the crimp

7.Poor budding

a. The center of the bottom hole of the bud is not coincident with the center of the bud, and the correct center position is determined.

b. The gap of the four molds is not uniform, which causes the budding to be high while the budding gap is low or even broken.

c. The bottom hole of the bud does not meet the requirements, resulting in the height of the bud and the recalculation of the hole diameter of the bottom hole. The pre-punching increases or decreases the diameter deviation and even breaks.

8.Poor molding

a. The convex die of the forming die is too sharp, which causes the material to be broken and the R die is repaired. The R edge is appropriately repaired at the knife edge.

b. The length of the forming punch is not enough, resulting in failure to calculate the correct length of the punch. Adjusting the actual length of the punch to achieve the type requirements

c. The forming punch is too long, the material at the forming part is deformed, and the correct length of the punch is determined. Adjust the actual length of the punch to meet the requirements until the punch breaks.

d. Insufficient material at the molding place causes tensile cracking to calculate the unrolled material, or repair the R angle, or reduce the molding!

height

e. Poor positioning, resulting in poor molding adjustment positioning or feeding device

9.Bending size

a. The mold is not adjusted in place, causing angular errors, resulting in dimensional deviation, closed height adjustment, poor or poor angular difference