Clean the surface of the outer covering with clean gauze. Inspectors need to wear touch gloves to touch the surface of stamped parts along the longitudinal direction. This inspection method depends on the experience of inspectors. If necessary, the suspicious area can be polished and verified By oil stone, but this method is an effective and rapid inspection method.
1. First, clean the surface of the outer covering with clean gauze, then polish it with asphalt (20 *20 *100mm or larger), with relatively small asphalt (eg 8 *100mm semi-circular asphalt) where there are are arcs and where It is difficult to touch.
2. The choice of particle size depends on the surface condition (such as roughness, galvanizing, etc.). Fine-grained oilstone is recommended. The direction of polishing is basically along the longitudinal direction, and it fits well to the surface of stamping Some special places can also be supplemented by horizontal polishing.
Flexible yarn grinding
Clean the surface of the outer covering with clean gauze. With flexible sand mesh grinding the surface of stamping parts along the longitudinal direction to the whole surface, any pitting and indentation can be easily found.
Clean the surface of the outer covering with clean gauze. Then apply oil evenly along the same direction with a clean brush to the entire outer surface of the stamping part. Put the finished oil stamping parts under strong light for inspection, and it is suggested that The Stamping Parts be erected on the body position. With this method, it is easy to find tiny pits, hollows and ripples on stamping parts.
Visual inspection is mainly used to detect abnormal appearance and macro defects of stamping parts.
Put the stamping parts into the checking fixture, and check the stamping parts according to the operating requirements of the checking fixture instructions.
The precision and structure of die directly affect the forming and precision of stamping parts. Die manufacturing cost and life are important factors affecting the cost and quality of stamping parts. Die design and manufacturing need more time, which prolongs the production preparation time of new stamping Parts.
Standardization of die base, die base and guide parts, development of simple dies (for small batch production), compound dies, multi-position progressive dies (for mass production), and development of rapid die changer can reduce stamping production preparation workload and shorten Preparation time, make it suitable for reducing stamping production preparation workload and shorten preparation time, and make it suitable for advanced stamping for mass production. Pressure technology is reasonably applied to small batch and multi-variety production.
In addition to forming thick plates by hydraulic press, mechanical press is generally used in stamping equipment. Machinery such as conveyor, mould library and rapid die changer can be controlled by computer program to form a high productivity automatic stamping production line.
When tens or hundreds of stamping parts are produced every minute, the processes of feeding, stamping, discharging and discharging waste materials are completed in a short time, and accidents of personal, equipment and quality often occur. Very important issue.
In the process of stamping, the temperature of the workpiece will rise rapidly, especially in the process of cold forging stamping. Lubrication products must be added to lubricate the workpiece. If no lubrication is used, stamping directly, welding-assembling, and parts without Oil on the surface are easy to weld and assemble. Research and practice show that the application of EMEC metal inert gas arc welding, tungsten gas shielded arc welding and resistance welding all have good results.