What should I do if there are burrs in the stamping die product?

I am now working on a set of 5mm cold plate fine blanking composite mold, at the beginning of the mold does not return the material, the force is not enough to get it. Then the upper mold does not return the material, and the force is not enough to get it. Now it is always broken knife edge and local punch drawing, the reason is that due to the small gap and insufficient machining accuracy, the punch is not surface treated, resulting in local pull and collapse punch.

If the gap is large, the burr is large, and if the gap is small, the burr is small, and the punch is easy to break if the gap is too small. Therefore, it is recommended that the gap of fine blanking is best to do a simple mold test to be safer. Personal advice: Don't spray if you don't like it;

Just use a polisher to deburr.

Summary. After the mold steel or part is machined, there will be a small iron cut on the edge of the part.

Something, referred to as burr.

The main disadvantage is that it is easy to scratch the hand (unsafe), and the edge of the part is not smooth, which affects the performance of the part.

Solution: Chamfer the C corner through the edge of the part, or polish it with an oil stone to deburr.

Mold burr hazards have those.

The burr of the mold is large, not the burr processed by the mold itself, but the burr of the mold, such as the cold stamping die, the stamping work, the corners are not clean, and there are burrs. The general reason is that the gap between the mold punch and the die is not suitable, such as a large gap or a deviation of the gap, or the wear of the mold edge, and the disadvantage of a large burr is that it is not good-looking, which affects the appearance quality. Bu Zhongxian.

After the mold steel or part is machined, there will be a small iron-like thing on the edge of the part, which is referred to as burr. The main disadvantage is that it is easy to scratch the hand (unsafe), and the edge of the part is not smooth, which affects the performance of the part. Beam code solution:

Through the edge of the part chamfered corner, or polished with oil stone, to remove the slag and thorns.

That can only be done with a slight polishing and grinding, and then doing other treatments will affect the size of the aperture

The burr is large, the foot is large, the hole is deformed, the local collapse is large, and the raised burr is large.

Reasonable clearance + pressing + cutting edge collapse repair welding.

Is there a problem with checking if the mold has been used for too long? Does the mold match the plate thickness? Generally, the gap of the mold is 10-15% of the plate thickness.

This kind of punching and deburring is now generally used for fluid polishing, with controllable beat and uniform polishing effect.

In this way, the semi-fluid abrasive passes through the inner hole of the stamping part under the action of the pressurization system, and constantly grinds and washes to remove burrs and polish at the same time.

1. Is the burr big? (Small glitches don't matter).

The causes and solutions of burrs in stamping parts.

1. The main reasons for burrs during stamping are as follows.

1. The blanking gap is too large, too small or uneven;

2. The cutting edge of the working part of the die becomes dull;

3. The center line of the punch and the die changes due to the long-term vibration impact, and the axis does not coincide, resulting in a single-sided burr.

2. Solution:

1. Ensure the processing accuracy and assembly quality of the punch, and ensure the verticality of the punch and bear the side pressure.

The force and the whole die should have sufficient rigidity;

2.When installing the punch, it is necessary to ensure the correct clearance of the convex and concave die, and make the convex and concave die installed firmly on the mold fixing plate, and the end face of the upper and lower die should be kept with the working surface of the press.

Parallel. 3.It is required that the rigidity of the press should be good, the elastic deformation is small, the accuracy of the rail, and the backing plate and slider are required.

The parallelism and other requirements should be high;

4.The press is required to have sufficient punching force.

In blanking machining, it is inevitable to produce different degrees of burrs.

The main reasons for excessive burrs:

1) The gap between the convex and concave dies is improper or uneven;

2) The cutting edge is dull due to wear and other reasons.

Although burrs are unavoidable on stamped parts, it is possible to reduce burrs by improving stamping conditions by doing the following:

1) Ensure the machining accuracy and assembly accuracy of the convex and concave die, ensure the verticality of the punch and the rigidity of the pressure measurement; The whole mold should have sufficient stiffness. In the use of the mold, often check the sharpness of the convex and concave die edges, and repair them in time after finding that they are worn.

2) Ensure that the gap between the upper mold and the lower mold is uniform after the mold is installed; The installation should be firm to prevent loosening during the stamping process; It is necessary to ensure the parallelism of the mold and the press.

3) The rigidity of the press is good, and the elastic deformation is small; The slider guide rail has high precision, the slider movement is stable, the backing plate is parallel to the bottom surface of the slider, and there must be a large enough working pressure.

Burrs on stamped parts can be removed by post-processing, the most common method is the use of rolling.