Punch die Common Problem Solution

(1) Punches wear too fast main reasons:
 ① die gap is too small, the general construction of the total Chinese die gap material thickness of 20%, 25%.
 ② punch and die neutral bad, including mold base and mold guide assembly and inadequate turret casement precision mold and other causes of bad towel member.
 ③ punch temperature is too high, mainly due to the same cause mold continuous time stamping punch overheating.
 ④ improper sharpening mold, resulting in mold annealing, increased wear.
 ⑤ unilateral partial punching, such as nibbling, when the angle of attack or shear, aluminum doors and windows accessories lateral force will punch one side, the side of the gap is reduced, resulting in mold wear serious, if the precision machine tool installation not high, severe migraine will punch through the die, resulting in damage to the punch and die.
 (2) mold with material problems
 Mold can cause scrap strip rebound, and its related factors:
 ① sharpness of the edge of the mold, a few rounded edges, the more likely to cause waste rebound.
 Modulus ② into the mold, the modulus of each host machine is constant, small amount of mold and die, likely to cause waste rebound.
 ③ mold gap is reasonable to Taiwan, if the mold gap is inappropriate, likely to cause waste rebound.
 ④ workpiece plate table and whether or not there are more oil composition.
 ⑤ spring fatigue damage.
 Method of preventing mold with material:
 ① the use of special anti-strip die. Aluminum alloy doors and windows accessories
 ② often die sharpening stay sharp, and demagnetization process.
 ③ increasing the die gap.
 ④ with oblique edge flat edge instead of n mold mold.
 ⑤ mold mounting retreat feeder.
 ⑥ reasonable to increase the modulus of the mold.
 ⑦ Check die springs or fatigue strength discharge sleeve.
 (3) Mold neutral issue
 Mold in the use of the red towel prone position on each side of the core amount of wear is different, and some part of a larger scratches, wear faster, in this case were thin rectangular mold is particularly evident. The problem mainly due to:
 ① tool turret design or lack of precision machining. Mainly up and down the dial Yun mold mount on neutral bad. ② plus precision mold design or can not meet the requirements.
 Guide sleeve ③ precision mold punch is not enough.
 ④ die gap inappropriate choice.
 ⑤ mold or mold mount bushings wear and tear caused by prolonged use of the neutral good.
 To prevent mold wear inconsistent, should:
 ① regularly use the machine on the mandrel turret and mount conduct checks on neutral adjustment.
 ② the timely replacement of mold guide sleeve and the appropriate choice of convex and concave mold gap.
 ③ with full lead mold.
 ④ strengthen the sense of responsibility of the operator, timely find out the reasons, it was found to avoid greater losses.
 (4) the use of special mold
 In order to meet production needs, often need to use a special mold or molds, mainly bridge-shaped mold, shutters die, sink hole-shaped mold, turning hole tapping the mold, the boss dies, drawing dies, molds and other combined use of special or Everyone mold town to increase productivity, but high enough molding mold price, usually 4-5 times that of ordinary mold. To avoid mistakes, we should pay attention to and follow the following principles:
 ① Check the direction of the mold installation, make sure that the mold punch is installed in the same direction.
 ② correctly adjusted according to the requirements of the mold stamping depth, each adjustment preferably not more than 0.15mm.
 ③ punching using a lower speed.
 ④ sheet to smooth and no deformation or tilt.
 ⑤ forming a top position due farthest from the clamp.
 ⑥ Avoid using a mold forming operation down:
 ⑦ first time in accordance with the ordinary stamping die stamping, and finally the use of mold.
 (5) Mold spring fatigue damage
 One problem in the use of punch die easily overlooked, aluminum doors and windows accessories die springs on the foot of life, die springs also require periodic maintenance or replacement, but many domestic users of the equipment and mold maintenance can be performed, but often overlooked mold spring maintenance, and even some users will not have to replace the spring years before, the same station or mold often damaged or punching the strip, but can not find the reason, then the replacement die springs, the problem is completely resolved. For different punch and die equipment, which are different types of mold spring. If maintained properly, prone to mold the strip and may damage the mold or guide sleeve, resulting in unnecessary losses.