How to ensure the service life of the die during the processing of precision stamping parts?

To ensure the service life of dies in precision stamping parts processing, the core is "material selection and adaptation+standard use+scientific maintenance+environmental control", so as to reduce wear and avoid damage from the whole life cycle of dies. The specific measures are as follows:

First, material selection and heat treatment: building a solid foundation for life.

Choose die steel according to the characteristics of stamping materials, such as wear-resistant steel such as Cr12MoV and SKD11 for stamping high-strength plates, and steel with good toughness such as DC53 for stamping thin and brittle materials.

The mold needs to undergo strict heat treatment to ensure uniform hardness (HRC58-62 is appropriate) and no cracks. The key parts can be strengthened by nitriding, chromium plating and other surface treatments to improve wear resistance and corrosion resistance.

Mould fittings (such as guide posts, guide sleeves and thimbles) shall be made of standard high-quality parts to avoid accelerated overall wear due to poor quality of fittings.

Second, the processing process: standardize the use and reduce the loss.

Accurately adjust the gap between the convex and concave dies, and the gap should match the thickness and hardness of the stamping material. If it is too large, it is easy to produce burrs, and if it is too small, it will aggravate the die wear and even lead to die sticking.

Control the stamping speed and pressure to avoid overload stamping (such as single stamping of thick materials, continuous high-speed stamping without cooling) and prevent the die from overheating and deformation.

Ensure smooth feeding, and adopt automatic feeding device or auxiliary tools to avoid uneven local stress of the mold caused by material skew and jamming, which will lead to edge collapse or wear.

Regularly clean up the residual waste, iron filings and oil stains on the die surface, so as to avoid impurities from being embedded in the die cavity or the gap between guide posts, resulting in scratches or sticking.

Third, daily maintenance: regular maintenance to extend life.

Before each startup, apply special high-temperature lubricating oil to the moving parts such as mold guide posts, guide sleeves and contact surfaces of convex and concave molds to ensure adequate lubrication.

After daily processing, thoroughly clean the surface and internal residues of the mold, check whether there are scratches and wear on the mold surface, and repair minor damage in time.

Replace wearing parts regularly, such as springs, thimbles, stripper plates, etc., to avoid abnormal stress on the mold due to the failure of wearing parts and cause greater damage.

When the mold is idle for a long time, it should be coated with antirust oil, packaged and moisture-proof, and stored in a dry and ventilated place to avoid oxidation and corrosion of the mold surface.

Fourth, the environment and auxiliary control: reduce external damage

Keep the processing environment clean, prevent impurities such as dust and iron filings from entering the gap between the molds, and control the humidity of the workshop (50%-60% is appropriate) to prevent the molds from rusting.

Regularly calibrate the precision of stamping equipment to ensure that the slider runs smoothly and the table is level, and avoid uneven stress on the die caused by the deviation of equipment precision.

In case of abnormal mold sound, mold sticking and sudden drop of workpiece precision, stop the machine immediately for inspection, and do not forcibly punch, and then restart it after checking the gap deviation and material jam.