| CHEN Xin,WANG Dong,LIU Yu-fan.Influence of High Speed Grinding on Surface Integrity of 18CrNiMo7-6[J],47(9):259-265 |
| Influence of High Speed Grinding on Surface Integrity of 18CrNiMo7-6 |
| Received:May 27, 2018 Revised:September 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.09.034 |
| KeyWord:high speed grinding gear material 18CrNiMo7-6 residual stress surface roughness surface integrity |
| Author | Institution |
| CHEN Xin |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
| WANG Dong |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
| LIU Yu-fan |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
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| Abstract: |
| The work aims to analyze surface roughness and residual stress of specimen, provide a test basis for studying high-speed grinding of gear materials on surface integrity of gears, and thoroughly discuss high-speed grinding process of gear material. Plane grinding was selected as main research method, and single factor method was proposed to be used for high speed grinding of 18CrNiMo7-6 according to Salomon theory and high speed grinding theory. Test variables were grinding wheel linear speed, grinding depth and table speed. As a result, relationship between the high-speed grinding process parameters and surface integrity (mainly surface roughness and residual stress) was obtained. The surface roughness of gear material 18CrNiMo7-6 was improved with the increase of grinding wheel linear speed, and decrease of grinding depth and table speed. The surface roughness could be accurately evaluated in three-dimensional roughness method. The influence of the grinding wheel linear speed on residual stress was the most significant, followed by the grinding depth, and the table speed the least. In addition to Vs=160 m/s, compressive residual stress of the specimen surface on 18CrNiMo7-6 receiving high speed grinding was improved. By analyzing the influence of high speed grinding on surface integrity, the optimal grinding parameters combination for the material being studied in the test is Vs=120 m/s, Vw=4 m/min, and ap=0.02 mm, compressive residual stress value of specimen under the grinding parameters is the maximum, which contributes to better surface integrity of specimen. |
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