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When we intend to change the machining process to PM, we need to consider 4 questions:
1. The quantity is big enough to ensure the investment of mould is reasonable, because the machining maybe doesn’t need to make mould;
2. Evaluate the structure and tolerance, to prove the feasibility, then offer necessary changes;
3. Evaluate the required physical properties, it should be in the limitation of PM process;
4. Calculate and see if the PM process is really cost-efficient than other technologies.
Gennerally speaking, there are few parts which are totally meet all above 4 points, but anyhow, the successful decision of PM is the result of positive compromise and deeply technical conversation.
The main classifications of gear:
1. Pinion gear
2. Ring gear
3. Duplicate gear
6. Worm gear
7. Spline hub
They are widely used in motor, enginee, gearbox, oil pump, water pump and other
structure of transmission.
Advantages of PM gear:
Few waste of the material, formed directly by only one or two times of pressing
High efficiency, stable quality level
Low material and production cost
Weakness of PM gear in comparison with machining gear:
Yield strength, breaking stength of the tooth
Density 7.2 g/cm³
Profile precision H6~H8
Macrohardness 25-40 HRC
Microhardness 60 HRC Max
The application of PM parts
Enginee parts, crankshaft timing belt pulley, water pump pulley, oil pump pulley, driving and driven gear, driving and driven sprocket, cam, bearing cap, rocker arm, bushing, thrust plate, valve guide, inlet and exhaust valve seat.
Transmission parts, gear hub and parts of various high and low speed synchronizer, clutch gear, cam and camshaft, sliding block, shift lever, axle sleeve, guide block, synchronous ring.
Driven gear and parts, sprocket, starter pawl, ratchet, star gear, duplicate gear, pinion gear, gear ring, variable gear, pushrod cam, shaft sleeve, sliding bearing, centring sleeve, driven disc, inlet and exhaust valve seat.
Oil pump parts:
Oil pum gear, gear hub, various rotors, inner rotor and outer rotor, gerotor, cam ring.
With productive and professional automobile car pinion gear factory, Dewin Group Limited can supply you with customized service. As one of the credible manufacturers and suppliers pinion gear of various types in China, we have custom products of unique design serving for you.