The reasons maybe as follow:
1: machine concentricity is not good
2: workpiece clamping is not good
3: grinding head has worn
The third possibility is greater. The front end of the grinding head is grinded, so it is easy to accour taper
To meet the high demand, change to the grinding head with good quality, or separate the coarse grinding and precission grinding
If the CNC internal grinding machine accours taper, to do some adjustment combined with internal grinder structure.
Generally,we can eliminate the taper of the workpiece by loosening the fastening screws of the internal grinder bracket or adjusting the angle of it.
If the work piece clamping head has a rotary mechanism, it can also be adjusted.
If the work table has a rotary mechanism, it can also be adjusted.
If you are interested in our products, or would like to join us, welcome to contact us.
WUXI CHANGYI MACHINE TOOLS CO.,LTD.
Add: Hengxin Road No.5, Qianqiao Hengyuanxiang Industrial Park, Wuxi City, Jiangsu