Process analysis: the processing of spiral bevel gear is mainly divided into the following stages:
1) Gear blank machining: the gear blank forming ensures the machining accuracy of the gear milling benchmark.
2) Intermediate inspection: mainly check the positioning and clamping dimensional accuracy of milling teeth.
3) Tooth shape machining: ensure the shape, position, size, tooth surface clearance and tooth side clearance variation of contact area.
4) Intermediate inspection: focus on the inspection of contact area, tooth side clearance and tooth surface roughness.
5) Heat treatment: carburizing and quenching, correction.
6) Post heat treatment machining: finishing assembly (use) benchmark.
7) Final inspection: overall inspection of the accuracy of the assembly reference dimension.
Develop machining process
The starting point of making the machining process route should be to ensure the technical requirements of the geometrical shape, dimensional accuracy and position accuracy of the parts reasonably. Under the condition that the production program has been determined as medium batch production, it can be considered to use general machine tools with special clamps, and try to concentrate the process to improve productivity. In addition, economic effects should be considered in order to minimize production costs.
(1) process route scheme I
Process 1 forging;
Procedure 3 heat treatment;
Process 5: milling two end faces and drilling central holes;
Procedure 7: axle neck and back cone;
Process 9 groove cone end face;
Process 11: milling involute spline;
Process 13 grinding of journal and end face;
Process 15: machining small holes;
Process 17 processing thread;
Check the journal in the middle of procedure 19;
Procedure 21 rough milling thread;
Procedure 23 fine grinding of gear.
Process 25 intermediate inspection;
Procedure 27 heat treatment correction;
Process 29 grinding of journal and end face;
Process 31 final inspection;
Operation 33 warehousing
(2) process route scheme II
Process 1 casting;
Procedure 3 heat treatment;
Process 5: milling two end faces and drilling central holes;
Procedure 7: axle neck and back cone;
Process 9 groove cone end face;
Process 11: milling involute spline and drilling small hole;
Process 13 grinding of journal and end face;
Process 15 processing thread;
Process 17 intermediate inspection;
Procedure 19 rough milling of gear teeth;
Procedure 21: finish milling the convex surface of gear teeth;
Process 23: finish milling the concave surface of gear teeth;
Process 25 intermediate inspection;
Procedure 27 heat treatment correction;
Process 29 grinding of journal and end face;
Process 31 final inspection;
Operation 33 warehousing.