Requirements for processing gears (for reference)

XNUMX. Gear parameters:

1. Modulus

2. Number of teeth

3. Accuracy grade

4. Tooth profile angle

5. Diameter of the index circle

6. Tooth top height

7. Tooth height

8. Modification coefficient

9. Cross-measuring the number of teeth

10. The length of the common normal

11. Coupling gear drawing number

XNUMX. Parameters of involute spline:

1. Module m

2. Number of teeth Z

3. Tooth profile angle

4. Tooth root form p (flat tooth root) r (round tooth root)

5. Tooth root arc radius

6. Measuring rod diameter

7. Distance between measuring rods

8. Modification coefficient

9. Accuracy grade and coordination category 6e

10. Effective tooth thickness min

11. Actual tooth thickness max

12. Effective tooth thickness max

13. Actual tooth thickness min

14. Coupling drawing number

40. XNUMXCr technical requirements:

Quenched and tempered hardness HRC25-30, spline high-frequency quenching HRC50~55

45. Technical requirements for XNUMX steel:

Hardened HRC45~50 in the surface hardening zone, hardened depth 1.0~1.5

35. Technical requirements for XNUMXCrMo:

Quenching and tempering treatment 25-30, spline high-frequency quenching HRC45-50

20. Technical requirements for XNUMXCrMnTi:

1、渗碳层深度0.7~1.1，表面硬度HRC58-64，芯部硬度HRC35~48，花键孔不允许渗碳，其表面硬度不低于HRC35；

2. The form and position error of each surface of the spline is detected by a comprehensive gauge;

3. Spline andgearThe coaxiality has process control;

4. The surface of the gear should be smooth and clean, and there should be no cracks, scars, oxide skin, cracks and metal delamination;

5. Remove burrs and sharp edges.

4. Four main technical requirements for gear processing:

1. Movement accuracy:

Mainly control the total error of the rotation angle of the gear in one revolution.That is, the gear pair transmission ratio is controlled to ensure the accuracy of the transmission movement.

2. Transmission smoothness:

It mainly controls the rotation angle error of the gear in a range of pitch angle.That is, the instantaneous transmission ratio of the gear pair is controlled to ensure smooth transmission and reduce vibration, impact and noise.

3. Uniformity of load distribution (contact accuracy):

Mainly control the contact marks on the tooth surface to ensure uniform load distribution.

4. Transmission backlash:

A certain amount of backlash is left between the non-working surfaces of the control meshing gear teeth to store lubricating oil, compensate for elastic deformation and thermal deformation, as well as gear manufacturing and installation errors.

Since the manufacturing accuracy and tooth backlash of the gear are mainly determined by the use and working conditions of the product, in actual use:

a. For gears used for heavy-duty and low-speed transmission, higher contact accuracy on the tooth surface is required to ensure that the product does not wear prematurely;

b. For gears used for reversing transmission and reading mechanism, the gear side clearance should be strictly controlled, and if necessary, the clearance should be eliminated;

c. For gears used for indexing transmission, the main requirements for the product's movement accuracy are high;

d. For high-speed power transmission gears, in order to reduce impact and noise, there are higher requirements for working stability and accuracy.

AboveMachining gearThe description of the requirements is for reference only. If there are any deficiencies, please add them. If you have relevant requirements, you can consult EP for free.