The core part of the cold forming equipment - the roll is the soul of the cold forming, the design of the roll is extremely important, the design characteristics of the roll are as follows:
1. According to the principle of average force of each pass of the cold-formed forming equipment, the rollers of the whole line are equally stressed, and the wear is balanced, which prolongs the service life of the rollers.
2. The material used for the roll of the cold bending forming equipment is to use its wear resistance, but the specific strength and hardness are contradictory. The red hardness of C12MoV should be used during heat treatment. After quenching, the hardness can be achieved by tempering twice or even three times.
3. The arc part of the track is the core part of the slide rail. The arc position after the first few passes is pressed and formed. When the vertical edge is rolled and folded in the next pass, the formed arc should be effectively protected by the upper and lower rollers or the horizontal wheel. Otherwise, the arc position of the material will change during the stretching process, R becomes smaller and becomes a triangle, the steel ball does not reach the end, and the two-point contact produces noise. Uneven force, the slide rail is deformed, and the life is shortened.
4. The problem of rolling stability. In production, we often encounter the problem of material swaying left and right in the raceway. In fact, a single set of rollers is asymmetrically affected, the left side is subjected to large force, and the material sways to the right; the right side is subjected to large force, the material Swing to the left.