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How to use and maintain the numerical control punch die

Date:2015-8-11

Abstract: the service life of the numerical control punch die, in addition to depend on the reasonable mold structure, high manufacturing accuracy, good heat treatment effect and the correct selection of the punch, punch die installation accuracy and other factors, the correct use, maintenance and maintenance is also not the link, which should pay attention to the following points:
CNC punch die life, in addition to a reasonable mold structure, high manufacturing accuracy, good heat treatment effect and the correct selection of punch, punch die installation accuracy and other factors, the correct use of the mold, maintenance and maintenance is also an important part of the ring, which should pay attention to the following:
(1) the mold installation should be strictly checked before use, remove dirt, guide sleeve and mould mould check whether good lubrication.
(2) check the mounting base of the rotary table and the mold on a regular basis to ensure the accuracy of the upper and lower turntable.
(3) installation procedures in accordance with the mold will die and punch on the turntable installed, ensure the die and punch in the same direction, especially with the requirements of (non circular and square) mold must work hard, to prevent wrong installation, anti loaded.
(4) after the die is installed, it shall check whether the fastening screws of the mould mounting base are locked.
(5) the die and die cutting edge of the punch die should stop using, and the edge grinding, otherwise it will rapidly expand the wear of the die cutting edge, accelerate the mold wear, reduce the quality and die life.
(6) for the use of mass production of common mold, should be back up, so that the rotation of production, to ensure the production required.
(7) stamping dies shall be used for the use of a more flexible metal (such as copper, aluminum, etc.) to prevent the installation process, the damage to the mold.
(8) die in the process of transporting tohandlegentlyand, must not be allowed to throw luanpeng, cutting edge and orientation so as to avoid damage to the mold.
(9) die should be back to the specified location after use, and oil anti rust treatment.
(10) to ensure that the service life of the mold, also should be regularly on the spring of the mold to replace, to prevent the spring fatigue damage affect the use of the mold. Common problems in the use of punch dies
(1) the wear is too fast
The main reason: the mold gap is small, the general proposal for the total gap between the mold material thickness of 20% ~ 25%. II die and punch to the neutral is not good, including die holder and a die guiding component and tower casement accuracy is insufficient, causes mold of the neutral is not good. The mould temperature is too high, mainly due to the same continuous long time stamping punch mould caused by overheating. The mold grinding method is undeserved, cause mould annealing, wear. The partial unilateral punching, such as step punching, punching shear or angle and lateral force will make a punch head tilted to one side, the edge of the gap is reduced, resulting in serious wear of die, if mold machine installation accuracy is not high, serious will make the punch bias mode, resulting in damage to the convex die and the concave die.
(2) the problem of the belt material of the die
Die belt material will cause scrap rebound, and its related factors: first, the sharp degree of cutting edge of the mold, the greater the rounded corners of the edge, the more easily lead to scrap rebound. The modulus of the mold, the machine tool for each position of the modulus is certain, the modulus of the mold is small, easy to cause scrap rebound. Whether the gap of the mold is reasonable, if the mold gap is not appropriate, easy to cause scrap rebound. The processed oil plate surface whether there are more. Spring fatigue damage.
Method to prevent the mold with the material. The mould often maintain sharp grinding, and demagnetization. To enlarge the gap of concave die. The oblique edge die instead of flat blade die. The installation of mould stripper. The increase in modulus of reasonable mould. Check the mold unloading spring or set of material fatigue strength.
(3) die for neutral problem
Die in the use of the core of the different side of the wear volume is different, some of the larger scratches, wear faster, this situation is particularly evident in the narrow rectangular mold. The main reason of this problem is: the design of machine tool turret or the machining accuracy is insufficient, and the main is that the upper and lower rotary table of the mold mounting base is not good. The design or machining accuracy of the die can not meet the requirements. The accuracy of the die is not enough. Don't choose the mould gap. The mold mounting seat or mold guide sleeve wear caused by long-term use of the neutral is not good.
In order to prevent the die wear is not the same, should be regularly used to: the mandrel on the machine tool turret and installing seat to adjust the neutral check. The timely replacement of die and punch die guide sleeve and select appropriate clearance. Use the whole lead mould. To strengthen the operator's responsibility, found time to find out the reasons, to avoid greater losses.

TypeInfo: Industry news

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