Process analysis: The processing of spiral bevel gears is mainly divided into the following stages:
1) Billet processing: Billet forming to ensure the processing accuracy of the milling reference.
2) Intermediate inspection: focus on checking the accuracy of clamping dimensions for milling teeth positioning.
3) Tooth machining: ensure the shape, position, size, tooth surface clearance and tooth side clearance variation of the contact area.
4) Intermediate inspection: focus on contact area, tooth side clearance and roughness of tooth surface.
5) Heat treatment: carburizing and quenching, correction.
6) After heat treatment: finish assembly (use) basis.
7) Final Inspection: Completely check the accuracy of assembly datum dimensions.
Formulating the Machining Route
The starting point for formulating machining process route should be to ensure reasonable technical requirements such as geometry, dimension accuracy and position accuracy of parts.Under the condition that the production program has been determined to be medium-batch production, universal machine tools with special fixtures can be considered and the process should be centralized as far as possible to improve productivity.In addition, economic effects should be considered in order to minimize production costs.
Process Route Scheme I
Procedure 1 forging;
Procedure 3 Heat treatment;
Procedure 5 milling both ends and drilling center holes;
Procedure 7 Car journal and back cone;
Procedure 9 slot cone end face;
Procedure 11 milling involute spline;
Procedure 13 grinding journal and end face;
Procedure 15: Machining small holes;
Processing procedure 17 for threads;
Procedure 19 check journal in the middle;
Procedure 21 rough milling thread;
Procedure 23 Fine grinding of gears.
Procedure 25 intermediate inspection;
Procedure 27 heat treatment correction;
Procedure 29 grinds journal and end face;
Process 31 final inspection;
Process 33 warehousing
Process route scheme 2
Procedure 1 Casting;
Procedure 3 Heat treatment;
Procedure 5 milling both ends and drilling center holes;
Procedure 7 Car journal and back cone;
Procedure 9 slot cone end face;
Procedure 11 milling involute splines and drilling small holes;
Process 13 grinding journal and end face;
Procedure 15 processing thread;
Procedure 17 Intermediate inspection;
Procedure 19 rough milling of gear teeth;
Procedure 21 finishes the cam surface of the gear teeth;
Process 23 finish milling concave surface of gear teeth;
Procedure 25 intermediate inspection;
Procedure 27 heat treatment correction;
Procedure 29 grinds journal and end face;
Process 31 final inspection;
Procedure 33 is warehoused.