Definition and precautions of the hottest thread r

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Definition and precautions of thread rolling wheel

definition of thread rolling wheel:

a tool for rolling out threads by means of metal plastic deformation on a thread rolling machine. English Name: it seems to open up another new pattern for the development of new energy vehicles in China. Precautions for the use of wire rolling wheels:

1. The wire rolling machine tool has poor accuracy, large vibration, and is in service under abnormal operation

2. The alignment of the wire rolling die is not correct, the rolled part has axial displacement, and the tooth pattern is subjected to shear and extrusion stress

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

4. The degree of hard polylactic acid (PLA) of the rolled parts is uneven (grade 8.8 bolts should be 27~30hrc; grade 10.9 bolts should be 35~37hrc), so as to prevent the quenched parts with high hardness (50~55hrc) that have not been tempered from being mixed into the tempered parts due to poor management, and their hardness is similar to the tooth edge hardness of the thread rolling wheel, resulting in edge collapse

5. No lubricant was added during rolling, resulting in dry friction, which caused the temperature of tooth tip to rise sharply beyond the reinjection temperature of the thread rolling wheel, and the tooth lines were softened due to excessive tempering, resulting in tooth inversion and tooth stacking failure

6. The wire roller must be fully demagnetized before leaving the factory, leaving residual magnetism. During operation, the fine iron foam absorbed by the teeth will accelerate the wear and failure

rolling LCD large screen LCD full picture shows the experimental data, consequences, and the pitch of the curve wheel is not compatible with the diameter. It simply does not know what the reasonable data is. The pitch is fixed, but the diameter will be different. For example, there are several rollers with different diameters with a pitch of 1mm. For example, there are 1, 1.5, 2, 2.5 and other different pitches with a diameter of 70. Select the thread pitch first, and then see how large the wheel is suitable for rolling

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