Although there are many advantages of metal stamping parts, how to test it
The molds used in the processing of metal stamping parts are generally specialized. Sometimes a complex part needs several sets of molds to be processed and formed, and the mold manufacturing has high precision and high technical requirements, which is a technology-intensive product. Our company stated that only when the stamping parts are produced in large batches, the advantages of stamping can be fully realized, so as to obtain better economic benefits.
1. Touch inspection
Wipe the surface of the outer cover with clean gauze. The inspector needs to wear touch gloves to touch the surface of the stamping part along the longitudinal direction of the stamping part. This inspection method depends on the inspector's experience. Whetstone can be used to polish the detected suspicious area and verify it, but this method can be regarded as an effective quick inspection method.
1. Whetstone polishing
a. First wipe the surface of the outer cover with a clean gauze, and then polish with oilstone (20×20×100mm or larger), and polish with relatively small oilstone (for example, : 8×100mm semi-circular oilstone)
b. The choice of whetstone particle size depends on the surface condition (such as roughness, galvanizing, etc.). It is recommended to use fine-grained oilstone. The direction of whetstone grinding is basically along the longitudinal direction, and it fits well on the surface of the stamping parts, and some special places can also be supplemented with horizontal grinding.
2. Polishing of flexible gauze
Wipe the surface of the outer cover with clean gauze. Use a flexible sand net to close the surface of the stamping part and grind it to the entire surface in the longitudinal direction. Any pitting or indentation will be easily found.
2. Oiling inspection
Wipe the surface of the outer cover with clean gauze. Then use a clean brush to apply oil evenly to the entire outer surface of the stamping in the same direction. Put the oiled stamping parts under strong light for inspection. It is recommended that the stamping parts be erected on the car body. This method can easily find tiny pits, pits, and ripples on the stamping parts.
3. Visual inspection
Visual inspection is mainly used to find abnormal appearance and macro defects of stamping parts.
Four, inspection tool testing
Put the stamping parts into the inspection tool, and inspect the stamping parts according to the operating requirements of the inspection tool manual.
Stamping process and characteristics: If stamping is classified according to the process, it can be divided into two major processes: forming and separating processes. The index of the forming process is to make the sheet metal plastically deform without breaking the billet to make a workpiece of the required shape and size. The separation process is also called punching, and its purpose is to separate the stamping parts from the sheet along the pre-set outline line, while ensuring the quality requirements of the separated section. In actual production, multiple processes are often integrated and operated on one workpiece. Blanking, straightening, shearing, spinning, and replacement are stamping processes that are often used.
The stamping parts are mainly made of metal or non-metal sheet materials by means of the pressure of a press machine. Our company says that it has the following characteristics: The surface and extension of the sheet metal used for stamping of 5 gold stamping parts are subject to the stamping The quality of waste products has a great influence. It is requested that the thickness of the stamping materials is rough and uniform; the surface is bright, no spots, no scars, no scratches, no surface cracks, etc.; uniform obedience strength, no appreciative bias; high uniform stretch rate; yield-strength ratio Low; low work hardening; stamping parts have high dimensional accuracy, the same size as the mold parts, and good interchangeability. No further machining is required to meet the general assembly and use requirements; the stamping parts are made by pressing under the premise of low material consumption. The parts are light in weight and rigid, and the sheet material is plastically deformed. , The internal layout structure of the metal is lost and improved, so that the strength of the stamping parts has been improved; in the stamping process, the stamping parts have a better inner quality because the inner core of the material is not crushed, and the outer appearance is smooth and beautiful. This is the inner spray paint, Electroplating, phosphating and other internal treatments provide arbitrary conditions.