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Modeling and analysis of tooth surface roughness for internal gearing power honing gear

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Abstract

This paper describes mathematical modeling of tooth surface roughness of gear finished by internal gearing power honing (IGPH) process. The surface roughness of gear tooth was decomposed into two parts: (1) tooth profile roughness (R a-h), and (2) tooth longitudinal roughness (R a-l). Based on the machining mechanism of IGPH, the R a-h and R a-l models of involute spiral tooth surface were established considering general roughness theory and internal gearing generating movement between the honing wheel and the work-piece. With the proposed model, the R a-h and R a-l of tooth surface can be calculated as a distribution from tooth addendum to dedendum. The IGPH and roughness measurement experiments for the automobile transmission gear were carried out to verify the proposed roughness model. The theoretical values of R a-h and R a-l have shown close agreement with the experimental ones. The effect of the IGPH process parameters on roughness values and honing paths are discussed based on the proposed model, and proposing a control method for the stable IGPH quality based on the stable honing velocity. The results have shown that the crossed axis angle under 8° is not suitable for the scope of IGPH process.

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Abbreviations

H EU :

The maximum height of groove calculated by E. Usui

τ :

The half cone angle of abrasive particle

v :

The velocity of the contact point on work-piece surface

V :

The velocity of the contact point on grinding wheel surface

d :

The curvature radius of the contact point on work-piece surface

D :

The curvature radius of the contact point on grinding wheel surface

Δ :

The average spacing between two adjacent abrasive particles

G :

The granularity of the abrasive particles

S :

The structure number of grinding wheel

h :

The height of plastic curvature

S a1 and S a2 :

The areas of plastic curvature

S a :

The area which ignores the effect of plastic curvature

c :

The compensation coefficient for plastic curvature

H :

The maximum height of groove considering the plastic curvature on work-piece surface

R a :

The roughness value on work-piece surface

w 1 :

The angular velocity of work-piece gear

w 2 :

The angular velocity of honing wheel

Z 1 :

The tooth number of work-piece gear

Z 2 :

The tooth number of honing wheel

β :

The helix angle of work-piece gear

m n :

The module of work-piece gear

v z :

The feed velocity of Z 1 axis

Σ :

The crossed axis angle between work-piece gear and honing wheel

φ 1 :

The rotation angle of work-piece gear

φ 2 :

The rotation angle of honing wheel

v O1 :

The velocity vector of the contact point on the tooth surface of work-piece gear

v O2 :

The velocity vector of the contact point on the tooth surface of honing wheel

v 12 :

The relative velocity vector of a random contact point in coordinate system S(O–x–y–z)

v 12h :

The relative velocity vector alone tooth profile direction

v 12l :

The relative velocity vector alone tooth longitudinal direction

v l :

The longitudinal direction velocity vector of contact point on work-piece gear tooth surface

V l :

The longitudinal direction velocity vector of contact point on honing wheel tooth surface

v h :

The profile direction velocity vector of contact point on work-piece gear tooth surface

V h :

The profile direction velocity vector of contact point on honing wheel tooth surface

w O1 :

The angular velocity vector of work-piece gear in coordinate system S(O–x–y–z)

w O2 :

The angular velocity vector of honing wheel in coordinate system S(O–x–y–z)

M OP :

The coordinate transmission matrix from S p(O px py pz p) to S(O–x–y–z)

M O1 :

The coordinate transmission matrix from S 1(O 1x 1y 1z 1) to S(O–x–y–z)

r O1 :

The position vector of contact points on work-piece gear tooth surface in coordinate system S(O–x–y–z)

r O2 :

The position vector of contact points on honing wheel tooth surface in coordinate system S(O–x–y–z)

t Oh :

The direction vector alone the tangent of involute at point M in coordinate system S(O–x–y–z)

t Ol :

The direction vector alone the tangent of helical line at point M in coordinate system S(O–x–y–z)

t h :

The direction vector alone the tangent of involute at point M in coordinate system S 1(O 1x 1y 1z 1)

t l :

The direction vector alone the tangent of helical line at point M in coordinate system S 1(O 1x 1y 1z 1)

R a-h :

Tooth profile roughness

R a-l :

Tooth longitudinal roughness

d l and D l :

The curvature radius of the contact point on work-piece surface and grinding wheel surface (tooth longitudinal)

d h and D h :

The curvature radius of the contact point on work-piece surface and grinding wheel surface (tooth profile)

r and R :

The radius values of work-piece gear and honing wheel at the contact point

p and p 2 :

The pitch of the helical line at the contact point

λ 1 :

The generating angle of involute at the contact point

r b1 :

The base circle radius of work-piece gear

α :

The pressure angle of work-piece gear

H EU-h :

The maximum height of gear profile groove

H EU-l :

The maximum height of gear longitudinal groove

H general-h :

The maximum gear profile groove height based on general theory

H general-l :

The maximum gear longitudinal groove height based on general theory

n :

The normal vector at the contact point

H generate-h :

The maximum groove height caused by the generated involute

H h :

The maximum groove height along gear profile direction

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China (51575154) and National Science and Technology Major Project (2013ZX04002051) for supporting this research under Grant.

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Correspondence to Lian Xia.

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Technical Editor: Márcio Bacci da Silva.

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Yuan, B., Han, J., Wang, D. et al. Modeling and analysis of tooth surface roughness for internal gearing power honing gear. J Braz. Soc. Mech. Sci. Eng. 39, 3607–3620 (2017). https://doi.org/10.1007/s40430-017-0791-z

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  • DOI: https://doi.org/10.1007/s40430-017-0791-z

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