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Six inspection methods for automobile stamping die parts
Date : 2025-04-18

Stamping dies are essential process equipment for stamping production and are technology-intensive products. The quality, production efficiency and production cost of stamping parts are directly related to mold design and manufacturing. The level of mold design and manufacturing technology is one of the important indicators of a country's product manufacturing level, and largely determines the quality, efficiency and new product development capabilities of the product. Let me show you the six inspection methods for stamping die parts in the automotive industry.


1. Touch inspection

Wipe the surface of the outer cover with a clean gauze. The inspector needs to wear touch gloves and touch the surface of the stamping part along the longitudinal direction of the stamping part. This inspection method depends on the experience of the inspector. If necessary, the suspected area detected can be polished with an oil stone and verified, but this method is an effective and quick inspection method.


2. Oiling inspection

Wipe the surface of the outer cover with a clean gauze. Then use a clean brush to evenly apply oil to the entire outer surface of the stamping part in the same direction. Put the stamped parts coated with oil under strong light for inspection. It is recommended to put the stamped parts upright on the body. This method can easily find tiny pitting, depressions and ripples on the stamped parts.


3. Grinding of flexible gauze

Use clean gauze to clean the surface of the outer cover. Use a flexible sand net to close the surface of the stamped parts and grind longitudinally to the entire surface. Any pitting and indentation will be easily found.


4. Grinding with oilstone

1) First, wipe the surface of the outer cover with clean gauze, and then grind with oilstone (20×20×100mm or larger). Use relatively small oilstones to grind arcs and hard-to-reach places (for example: 8×100mm semi-circular oilstones)

2) The choice of oilstone particle size depends on the surface condition (such as roughness, galvanizing, etc.). It is recommended to use fine-grained oilstones. The direction of oilstone grinding is basically along the longitudinal direction, and it fits the surface of the stamped parts well. Some special places can also be supplemented with horizontal grinding.


5. Visual inspection

Visual inspection is mainly used to find abnormal appearance and macro defects of stamping parts


6. Inspection of inspection fixture

Put the stamping parts into the inspection fixture and inspect the Nanpi stamping parts according to the operating requirements of the inspection fixture manual.

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