Methods and steps of turning tool grinding

Turning tool with blunt re - grinding is grinding on the grinder, today we look at the method and steps of getting off the turning tool grinding

1. Grind off welding slag from front and back

And the bottom surface of the turning tool is ground flat, and the alumina grinding wheel with particle size 24-36 can be used.

2. Roughen the handle part of the main rear and auxiliary rear

When grinding, the outer cylinder of the grinding wheel is slightly higher than the horizontal position of the grinding wheel center, the turning tool is raised at an Angle 20-30 larger than the upper rear Angle of the tool body, and slowly moves left and right in order to grind the main rear Angle and auxiliary rear Angle of the tool body. Optional 24-36 grain size, hardness of soft alumina grinding wheel.

3. Roughen the main back on the tool body

When grinding the rear surface of the tool, the handle should be parallel to the axis of the grinding wheel, and the bottom of the tool body should be tilted towards the direction of the grinding wheel at an Angle 20 larger than the main rear Angle. When sharpening, first sharpen the turning tool

The rear clearance surface is close to the outer circle of the grinding wheel, and the starting position of the grinding wheel is close to the center of the grinding wheel, and then the grinding continues to close to the grinding wheel, and slowly moves left and right. When the grinding wheel grinding to the insert can be finished. This can be done at the same time

Grind out the main declination Angle and the main rear Angle. Optional 36-60 silicon carbide grinding wheel.

4. Auxiliary rear Angle on coarsely sharpened tool body

When grinding the back of the pair, the tail of the tool handle should be turned to the right by an Angle of accessory Angle, and the bottom of the tool is tilted towards the direction of the grinding wheel by an Angle 20 larger than the rear Angle of the pair. The specific grinding method is basically the same as that of the main back of the rough grinding tool body, but the difference is that the grinding wheel should be ground to the tool tip when grinding the back of the rough grinding tool. It can also grind out the auxiliary declination Angle and auxiliary rear Angle at the same time.

5. Roughen the front

The front of the lathe tool is roughened with the end face of the polished piece, and the front Angle is grinded at the same time.

6. Grind the chip breaker

There are two kinds of chip breaker, one is linear, suitable for cutting hard materials; One is circular arc type, suitable for softer materials.

7. Main rear and auxiliary rear of fine grinding

Before fine grinding, it is best to dress the polishing piece and keep smooth rotation. The bottom plane of turning tool is on the adjusted bracket, and the cutting edge is gently on the end face of grinding wheel, moving slowly around the end face of grinding wheel. Optional grinding wheel with particle size of 180-200.

8.Grind negative chamfering

The Angle of negative chamfering is -50--100, and the width is B = (0.5 -- 0.8) F. Negative chamfering is not suitable for hard alloy turning tools with a higher Angle and materials with low strength and hardness. When grinding negative chamfering, use light force to swing the back end of the main cutting edge toward the tip. tool grinding can be used direct grinding method and horizontal grinding method, the best use of direct grinding method.

9. Sharpen transition edges

The grinding method of the transition edge is the same as that of the back edge. When grinding the turning tool of hard materials, negative chamfering can also be grinded on the transition edge.

10. Hand grinding of turning tools

Grinding with oil stone requires smooth movement and uniform force.