Basic introduction of cold roll forming machine

Design and manufacture characteristics of cold roll forming machine:

1. Through the principle of average force each time, the rollers of the entire production line are evenly stressed, the wear is balanced, and the service life of the rollers can be extended.

2. C12MoV material is used for rolls to take advantage of 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 obtained 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 suppressed and formed. When the vertical edge is rolled and folded in the next pass, the arc formed should be effectively protected by the upper and lower rollers or horizontal wheels. Otherwise, the arc position of the material will definitely change during the stretching process. R becomes smaller and becomes a triangle, and the steel ball is not at the bottom. Two-point contact will produce noise. When R becomes larger, the matching track will shake and the track will become blurred when using the slide rail. Uneven force and deformation of the slide rail shorten the service life.

4. Rolling stability issues. In the production process, the problem of deflection of the raceway material is often encountered. In fact, a single set of rollers is asymmetrical, the left side is stressed, and the material is biased to the right; the right side has a lot of pressure, and the material swings to the left. The way to unlock is:

a: The calculation of the neutral layer in the deformation zone is accurate, the calculation of the material used in the deformation zone is accurate, and the roll processing has good symmetry.

b: Do not apply as much stress as possible to the undeformed area (such as the bottom of the slide rail), and the gap between the upper and lower rollers should be consistent during the assembly process.

c: Before the material bites in, the guide slope should be set according to the rolling state of the front crawler, and the material will slide smoothly in the roller before the pressure is stabilized.

5. The problem of bending and twisting in production is mainly due to unbalanced force, unbalanced force on left and right, bending of force on left and right, and unbalanced force on upper and lower causes deformation. Solution: Balanced design force, accurate processing, convenient installation and debugging.

6. The accuracy of drum processing is the key. Therefore, a special tool was specially made for inspection under the projector and magnified by 20 times.

7. Tapered roller bearings are used on the main drive side to ensure that the radial runout of the main shaft is within 0.04 mm and that the main shaft does not move left or right. Ordinary ball bearings have their own clearance, and axial movement cannot be avoided during accurate transmission.

No matter what equipment is used, it will inevitably lead to failures, and the same is true for cold roll forming machines. The following explains the solutions to common faults in use:

When formulating a maintenance plan for cold-formed equipment, it is necessary to ensure timely on-demand maintenance of cold-formed equipment, avoid excessive and insufficient maintenance, reduce downtime, and increase the utilization rate of cold-formed equipment. Please note the following:

One: The content of cold-formed equipment maintenance work, except for minor repairs, needs to be determined based on a comprehensive technical evaluation of the cold-formed equipment technical inspection to achieve on-demand maintenance;

Two: The operation content and level of cold-formed equipment maintenance should be properly considered to comprehensively evaluate the working environment, load level, total working hours and maintenance level of cold-formed equipment;

Third: For maintenance projects with heavy workload and difficult operation, or assembly overhaul and complete machine overhaul, it is necessary to arrange as much as possible during the off-season of the project to reduce the impact of cold bending equipment shutdown on project construction.