Stamping parts processing factory share: stamping parts surface quality testing method and evaluation criteria
As has 20 years experience in stamping parts processing, stamping processing plants, for the product quality inspection and evaluation methods, from a set of methods, the authors study together with everybody share today: the current check surface quality of stamping method, for visible defects, mainly through visual observation, for the slight defect, by wearing cloth glove touch, oilstone grinding as well as the method to check the light reflection.
Most of the stamping surface inspection is carried out by the light reflection detection.
Using light wall inspection parts surface quality, the high speed motor oil and alcohol, with 1:8 volumes than its fully mixing, brush with wool brush evenly over the surface of the tested parts, and put the parts on the wall, the light under sufficient light, according to the principle of light reflection to judge surface flatness, if an area light reflection desultorily, explain the regional surface defects.
Surface quality evaluation for surface defect detection methods, just intuitively reaction defects exist, and can't reflect the severity of the defects in itself.
Now stamping parts surface was developed for the detection of gm GSQE (
Global surface quality evaluation)
The surface of each part of the system, the vehicle according to the possibility of defects was found and its influence on the vehicle the appearance quality is divided into A, B, C and D4.
For fully visible area, B is A regular visible region, C is generally not visible area, D as totally invisible area, and according to the degree of impact on the product surface defect and found the ease of from low to high divided into one, two, three.
Level is obvious, without oil without using any lighting can find defects.
The secondary is needed a light (
2 ~ 3 m distance observation points)
Principle, through the reflection of light to identify defects, that is, from two or more different direction or Angle (
With observation point vertically into 30 ° to 45 °)
The location of defects can be found in the same area of the same.
Class for more subtle defects, through the illuminate of light are not necessarily see, must be careful and meticulous, close from one direction or Angle can be found.
Surface defects was found according to the location and the ease of button have different scores, finally according to the size of the buckle scores to judge the severity of the defects, formulate the corresponding prevention measures, can effectively control the stamping parts processing and surface quality.
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