Pulley

The pulley should be processed according to ISO9982 standards, and the processing process needs to be focused
Focus on the following points:
A: Specifications
B: Geometric structure (groove pulley processing, the groove top arc must meet rt)
C: Surface roughness (when machining groove pulley, its surface roughness must meet: Ra≤ 3.2 μm)
D: Radial Deflection

All the above requirements are to ensure the normal operation of the belt and pulley. Only in this way can the normal transmission function and long service life of the belt be exerted. For example, the size of the wedge angle and the belt pulley are 40 °. The bottom arc of the belt wedge is smaller than the top arc of the pulley, and the bottom arc of the pulley tooth is smaller than the top arc of the belt wedge, so that there is space for the bottom of the pulley tooth and the bottom of the belt tooth, and the tension of the belt can fully act on the wedge surface of the belt and the pulley. Provide maximum friction.

Cut three samples with a length of 250 mm from one PJ V-ribbed belt, and mark a marking line with a spacing of 100mm at the middle position of the PJ V-ribbed belt. When more than three samples cannot be taken from one PJ V-ribbed belt, samples can be cut from the same batch of PJ V-ribbed belt, but must be indicated in the report. 7.4.2 High temperature resistance test method
Place the sample at 100 ℃ ± 2 ℃ for 96 h ± 1 h and then take it out. After standing at laboratory temperature for more than 2h, bend it along a cylinder with a diameter of 20 mm at a contact angle of at least 90 °.