Centerless grinding machines, cylindrical grinding is outside the circle, the work does not require the use of a class of grinding axis grinder, grinding wheel is composed of, and introduction bracket three agencies. Centerless grinding machine grinding common defects are the following.

First, the parts are not round causes are:

1) Introduction not rounded. It should be rebuilt guide wheel until the introduction rounded full length.

2) original artifacts through the large oval, take a small amount of cutting, grinding, often enough. It should be appropriate to increase the number of grinding.

3) Wheel blunt. Rebuilt wheel.

4) excessive grinding or cutting away excessive. Reducing the amount of wear and the cutting speed.

Second, the reason for the occurrence of the polygon parts:

2) Part axial thrust is too large, so that the stop pin pressed parts and lead can not be uniformly rotated. Introduction to reduce the inclination angle grinder to 0.5 ° or 0.25 °.

3) grinding wheel imbalance. Should balance wheel

4) Part center too. Appropriate to reduce the height of the center part is like.

Third, the part surface vibration traces of reasons:

1) Wheel imbalance causes the machine to vibrate. It should balance wheel.

2) Part of the workpiece center forward beating. It should be appropriate to reduce the workpiece center.

3) Wheel obtuse or wheel surface dressing too light. Just Dresser wheel or increase the speed can be.

4) Adjust the wheel rotational speed is too fast, should be appropriate to reduce the fine adjustment wheel to select the speed.

Fourth, the workpiece taper (centerless grinding machine modulation methods and procedures)

1) Dresser is incorrect, there will taper itself.

2) wheel and guide wheel surface has worn. Replacement of wear-free guide wheel or wheel either.

3) the inclination angle in the guide plate is too large or small. It should be properly moved into the front guide plate and adjust the leading guide wheels parallel bus. After adjustment policy guide surface of the guide wheel lines are parallel and in line.

Fifth, the center of the workpiece size because two small occurrence

1) front and rear side of the guides even tilt wheel. Remedy: should adjust the guides back and forth,

2) Dresser into a toroidal shape. Remedy: wheel should be modified, each time you modify the balance is not too large.

Sixth, the front end of the workpiece has been rubbed off a small piece of causes

1) the front guide wheel projecting guide surface, leading plate should move a little backwards.

2) the adjustment wheel and the front end face grinding wheel is not in a straight line, and that much difference. Should replace or modify both the longest one.

3) during the grinding worn entrance too. It should be appropriate to reduce the amount of grinding grinding at the entrance.