NEWS

2021-03-01

Grinding defects and solutions

No. Grinding Type Grinding defects Reasons Solutions
1 Cylindrical grinding Straight ripple on workpiece surface Unbalance wheel Correct balance of the grinding wheel

 

2 Cylindrical grinding Straight ripple on workpiece surface Wheel too hard, or uneven hardness Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

3 Cylindrical grinding Straight ripple on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

4 Cylindrical grinding Straight ripple on workpiece surface Uneven wear Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

5 Cylindrical grinding Straight ripple on workpiece surface Less sharp after dressing The dressing allowance is too small, or diamond grits wear too much and lost the sharping edge. Use the right dressing method and dressing allowance according the grinding requirements.

 

6 Cylindrical grinding Spiral ripple on workpiece surface Wheel too hard Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

7 Cylindrical grinding Spiral ripple on workpiece surface The dressing allowance is too small Use the right dressing method and dressing allowance according the grinding requirements.

 

8 Cylindrical grinding Spiral ripple on workpiece surface Unstable thermal deformation of the machine when dress the wheel. Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

9 Cylindrical grinding Spiral ripple on workpiece surface Untimely dressing, uneven wear Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

10 Cylindrical grinding Spiral ripple on workpiece surface Insufficient grinding fluid when dressing Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

11 Cylindrical grinding The surface of workpiece is roughened and scratched Abrasive particles falling off Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

12 Cylindrical grinding The surface of workpiece is roughened and scratched Abrasive particles falling off Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

13 Cylindrical grinding The surface of workpiece is roughened and scratched Too rough grit size Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

14 Cylindrical grinding The surface of workpiece is roughened and scratched There are empty grains on wheel surface after dressing Use the grinding wheel with coarse grit to work with soft metal or other non-ferrous metal. After the prominent grains wear off then work with workpiece.

 

15 Cylindrical grinding Burning on workpiece surface Bond is too hard, or grit size is too fine Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

16 Cylindrical grinding Burning on workpiece surface Wrong grit type Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

17 Cylindrical grinding Burning on workpiece surface Wrong bond type Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

18 Cylindrical grinding Burning on workpiece surface Dressing allowance is too small Use the right dressing method and dressing allowance according the grinding requirements.

 

19 Cylindrical grinding Burning on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

20 Cylindrical grinding Workpiece is tapered Uneven wear or less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

21 Cylindrical grinding Workpiece is tapered Wrong dressing method Use the right dressing method and dressing allowance according the grinding requirements.

 

22 Cylindrical grinding Workpiece is drum shaped or sallde shaped Poor forming accuracy Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

23 Cylindrical grinding Workpiece is drum shaped or sallde shaped Less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

24 Cylindrical grinding The surface of workpiece is roughened and scratched The corner is worn, or the generatrix is not straight Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

25 Cylindrical grinding Perpendicularity of workpiece end face out of tolerance The contact area between wheel end face and workpiece is too big Dress the wheel to reduce the contact area or change appropriate wheel

 

26 Cylindrical grinding Perpendicularity of workpiece end face out of tolerance Wheel become less sharp after grinding Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

27 Cylindrical grinding Roundness of workpiece out of tolerance Uneven wear or less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

28 Internal grinding Straight ripple on workpiece surface The extension shaft is long and thin with poor rigidity Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

29 Internal grinding Straight ripple on workpiece surface Less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

30 Internal grinding Straight ripple on workpiece surface Wheel diameter is too big to case vibration Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

31 Internal grinding Straight ripple on workpiece surface The contact length between wheel and workpiece is too long to case vibration Dress the wheel to reduce the contact area or change appropriate wheel.

 

32 Internal grinding Spiral ripple on workpiece surface Poor contact between wheel and workpiece Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

33 Internal grinding The surface of workpiece is roughened and scratched The contact area between wheel and workpiece is too big Dress the wheel to reduce the contact area or change appropriate wheel.

 

34 Internal grinding Workpiece is tapered Wheel is too soft Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

35 Internal grinding Workpiece is tapered Less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

36 Internal grinding Burning on workpiece surface Wheel diameter is too big Reduce the wheel diameter.

 

37 Internal grinding Burning on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

38 Internal grinding Workpiece is trumpet shaped When grinding the inner hole with groove, the groove is trumpet shape because wheel is too thin. Increase the wheel width.

 

39 Internal grinding Workpiece is trumpet shaped When grinding the inner hole with a short shoulder hole, the hole show trumpet shape because wheel over workpiece too much. Change smaller width wheel or reduce the wheel diameter of the part beyond the workpiece
40 Internal grinding Workpiece is trumpet shaped When grinding the inner hole with keyway, the grinding wheel is too wide to cause the deform angle on keyway. Reduce the wheel thickness, or insert a bakelite or metal block into the keyway.

 

41 Surface grinding Ripple on workpiece surface Unbalance wheel Balance the wheel correctly.

 

42 Surface grinding Ripple on workpiece surface Wheel bond is too hard Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

43 Surface grinding Ripple on workpiece surface Uneven hardness Change better quality wheel.

 

44 Surface grinding Ripple on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

45 Surface grinding Straight scratches on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

46 Surface grinding Burning on workpiece surface Bond is too hard, or grit size is too fine Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

47 Surface grinding Burning on workpiece surface Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

48 Surface grinding Burning on workpiece surface The dressing allowance is too small Use the right dressing method and dressing allowance according the grinding requirements.

 

49 Surface grinding The side of workpiece is trumpet shaped Chose wrong wheel Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

50 Surface grinding The side of workpiece is trumpet shaped Less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

51 Surface grinding The parallelism or flatness of the surfaces of workpiece is out of tolerance Less sharp wheel Dress the wheel in time, can make beveled slots on wheel OD face.

 

52 Surface grinding The parallelism or flatness of the surfaces of workpiece is out of tolerance Chose wrong wheel Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

53 Centerless grinding Roundness of workpiece out of tolerance Less sharp wheel Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

54 Centerless grinding Roundness of workpiece out of tolerance Unclean surface of guide wheel Clean the guide wheel in time.

 

55 Centerless grinding Roundness of workpiece out of tolerance The guide wheel is not rounded or out of roundness due to long working time Pay attention on dressing in time.

 

56 Centerless grinding Workpiece is prismatic circle Unbalance grinding wheel or guide wheel Re-balance the grinding wheel or guide wheel.

 

57 Centerless grinding Cylindricity of workpiece out of tolerance The wheel bond is too soft when plunge grinding Chose harder wheel, dress the wheel in time, change smaller infeed, increase more spark out grinding.

 

58 Centerless grinding Cylindricity of workpiece out of tolerance Wrong dressing method Adjust the position of the dresser according to the taper direction of the workpiece and re-dress the grinding wheel.

 

59 Centerless grinding Cylindricity of workpiece out of tolerance The grinding wheel and guide wheel wear too much, lost the original shape Dress the grinding wheel and guide wheel in time, ensure the correct shapes.

 

60 Centerless grinding Vibrating marks on workpiece surface Unbalance grinding wheel or guide wheel Re-balance the grinding wheel or guide wheel.

 

61 Centerless grinding Vibrating marks on workpiece surface Wheel become blunt, or too hard bond Master the characteristics of workpiece and precision changing. Dress the wheel in time.

 

62 Centerless grinding Vibrating marks on workpiece surface Wheel grit size is too fine Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

63 Centerless grinding Vibrating marks on workpiece surface The grinding wheel is dressed too rough or too fine Use the right dressing method and dressing allowance according the grinding requirements.

 

64 Centerless grinding Burning on workpiece surface The grinding wheel is dressed too fine, or the wheel is less sharp Use the right dressing method and dressing allowance according the grinding requirements.

 

65 Centerless grinding Burning on workpiece surface Wheel bond is too hard Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

66 Centerless grinding Roughness of workpiece surface is out of tolerance Grit size is too coarse Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

67 Centerless grinding Roughness of workpiece surface is out of tolerance Dressing allowance is too big Use the right dressing method and dressing allowance according the grinding requirements.

 

68 Centerless grinding Roughness of workpiece surface is out of tolerance Wheel bond is too soft Chose the correct wheel according the characteristics of workpiece material and the performance of grinding wheels.

 

69 Centerless grinding Workpiece size dispersion The new dressed wheel is less sharp, or diamond grits wear too much. Change new wheel or change the gridning wheel rotation direction.

 

70 Camshaft grinding The accuracy of cam lift curve is out of tolerance The wheel diameter is out of allowed range. Change smaller diameter wheel.

 

71 Guideway grinding Workpiece deformation or error out of tolerance Chose wrong wheel Chose the suitable grinding wheel according to the workpiece material and hardness. When workpiece hardness is over HRC 64, shall chose CBN wheel instead abrasive wheel.

 

72 Guideway grinding Workpiece deformation or error out of tolerance Wheel become blunt, less sharp Master the characteristics of workpiece and precision changing. Dress the wheel in time.