Rolling wheel use precautions

The so-called rolling wheel refers to a tool for rolling out the thread on the thread rolling machine by means of metal plastic deformation, but in the process of operating such a small tool, it is also necessary to pay attention to some points, otherwise not only the pressed thread Not beautiful, and there may be dangers during its operation. What should you pay attention to during the operation of the rolling wheel? Let’s take a look!

1. The thread rolling machine has poor precision, large vibration and service under abnormal operation;

2. The thread rolling mold is misaligned, the axial displacement of the rolling element occurs, and the tooth pattern is subjected to two stresses of shearing and pressing;

3, the size of the rolled thread blank is uneven, the surface is not cleaned, there are grinding wheel foam, oxide scale and dirt;

4. The hardness of the rolled parts is uneven (8.8 bolts should be 27~30HRC; 10.9 grade should be 35~37HRC) to prevent the high hardness (50~55HRC) quenching parts that are not tempered sometimes due to poor management. In the fire member, the hardness is similar to the hardness of the cutting edge of the rolling thread, resulting in chipping;

5. No lubricant is added during rolling, causing dry friction, causing the temperature of the tip to rise sharply beyond the tempering temperature of the rolling wheel. The excessive tempering of the tooth is softened, and the toothing and the toothing failure occur.

6. The rolling wheel must be fully demagnetized before leaving the factory, leaving residual magnetism. When working, the fine iron foam will accelerate the wear and tear.

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Label: Rolling wheel use precautions

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