免费国产视频_亚洲国产女人精品久久久_国产欧美日产A片_91porn国产_欧美精品久久久久久久久久丰满_日日日夜夜操_91熟妇视频_精品探花对白视频在线观看,97久人人做人人妻人人玩精品 ,91露脸熟女对白不带套,正在播放日韩一区二区

The various products we often see in large and small supermarkets are produced by professional manufacturers, and only after formal inspection are they placed on the shelves for people to purchase. Hardware stamping parts are no exception, but many people do not know the inspection methods for hardware stamping parts. Today, Licao Hardware Stamping Factory will introduce them to everyone.

1. Oil coating inspection of hardware stamping parts:

Wipe the surface of the outer cover with clean gauze. Use a clean brush to evenly apply oil in the same direction to the entire outer surface of the stamped part.

Place the oiled hardware stamping parts under strong light for inspection. It is recommended to place the stamping parts vertically on the vehicle body. During the stamping process, metal stamping parts have good surface quality and a smooth and beautiful appearance due to their undamaged surface. This provides convenient conditions for surface painting, electroplating, phosphating, and other surface treatments. By using this method, it is easy to detect small pits, dents, and ripples on hardware stamping parts. 2. Touch inspection of hardware stamping parts:

Wipe the surface of the outer cover with clean gauze. The inspector needs to wear touch gloves and touch the surface of the metal stamping part longitudinally along the stamping part. This inspection method depends on the inspector's experience. The curved edge is too short to form easily, so the straight part of the curved edge should be H>2 δ。 If H is required to be very short, it is necessary to leave an appropriate margin to increase H first, and then cut off the added metal after bending. If necessary, oil stones can be used to polish and verify the suspicious areas that have been detected, but this method is an effective and fast inspection method.

3. Visual inspection of hardware stamping parts:

Visual inspection is mainly used to detect visual abnormalities and macroscopic defects in stamped parts.