Do you know the tooth profile condition of powder metallurgy gear?

Do you know the tooth profile condition of powder metallurgy gear?

Do you know the tooth profile condition of powder metallurgy gear? It is understood that the powder metallurgy gear is widely used in the automobile and motorcycle industries. It usually has such tooth profile parameters as modulus, number of teeth, pressure angle, span tooth thickness, tooth tip diameter, tooth root diameter, gear accuracy, etc. Now, Zhongwei Precision Powder Metallurgy Processing Factory will talk about the tooth profile conditions of powder metallurgy gears in detail:

Powder metallurgy gear

1. Measurement of tooth top diameter tolerance: the range of sinter tooth top diameter tolerance can be controlled:

The tooth tip diameter is less than 20, and the recommended tolerance is ± 0.1.

The tooth crest diameter is less than 40, and the recommended tolerance is ± 0.13;

The tooth crest diameter is less than 60, and the recommended tolerance is ± 0.15;

Note: Since the tooth tip diameter and tooth root diameter have little influence on gear transmission, the tolerance does not need to be very strict, which will increase the cost.

2. Measurement of tooth root diameter tolerance: the control range of sintered tooth root diameter tolerance is the same as that of tooth tip diameter tolerance.

3. Measurement of tooth thickness tolerance: control range of cross tooth thickness of sintered gear:

If the thickness of the span tooth is less than 5, the recommended tolerance is (0/-0.04).

When the span tooth thickness is less than 10, the recommended tolerance is (0/-0.05).

When the span tooth thickness is less than 15, the recommended tolerance is (0/-0.06).

Note: If the tolerance range of span tooth thickness (clearance affecting gear engagement) is small, finishing works (finishing with machining die) need to be added.

4. Measurement of inner diameter tolerance of gear hole:

When the inner diameter tolerance is small, the sintered gear will be machined to ensure that the dimensions are within tolerance.

When the inner diameter tolerance is small, the heat treated gear will be machined to ensure that the dimensions are within tolerance.

5. r arc of tooth top and root:

It is recommended that the R arc of the tooth top be 0.15 minutes.

R arc (0.38 * m) of root is recommended to be R0.2 min.

The above is an introduction to the tooth profile conditions of powder metallurgy gears by Zhongwei Precision. Powder metallurgy gears are difficult to calculate separately in the whole powder metallurgy parts, but the proportion of powder metallurgy gears in various machinery, automobiles and motorcycles is far greater than that in other fields according to the weight or the number of parts. Friends with relevant needs can call for consultation.