How do I grind the blade of a reamer?

A reamer is a multi-edged tool for semi-finishing and finishing holes. Reamer types and specifications are many, in the production and processing of more common reamers have spiral groove reamers, tapered reamers, adjustable reamers, sets of machine reamers, and so on. So how do you sharpen the reamer?

Here is the content list:

●How do I polish the blade of the front of the reamer?

●How do I polish the blade behind the reamer?

How to polish the blade of the front of the reamer?

Generally in the universal tool grinding machine with a disc-shaped grinding wheel flat-ended edge grinding reamer front knife front face. Select the grinding wheel and mount it on the grinding head, trim the flat end surface of the disc grinding wheel into a tapered surface with a high center bottom of the edge, place the reamer between the two needles, and turn the grinding head over a certain angle according to the direction of the determined grinding wheel retreat, to facilitate the grinding wheel retract, and make the grinding wheel only an edge is involved in grinding; adjust the relative position of the reamer and the grinding wheel, the reamer of the front angle of the edge grinding, the end face of the grinding wheel shall pass through the center of the reamer, the reamer of the front corner of the edge grinding, and the end of the grinding wheel shall have a bias to start the grinding wheel and start the cutting. Hand-held reaming knife, so that the front face of the reamer against the end surface of the grinding wheel, the workbench to do vertical feed, hand to the hinge knife must have a force instead of horizontal feed. Grind one tooth and then another until the full part of the tooth is worn.

How to polish the blade behind the reamer?

Generally in the universal tool grinding bed with a bowl-shaped grinding wheel flat-ended edge grinding reamer of the back knife. There are two kinds of situations in which the grinding wheel rotates relative to the reamer when the blade is grinding the rear face of the reamer: 

(1) the grinding wheel rotates and grinds. The rotation of the grinding wheel allows the front face of the reamer to be close to the tooth support. Blade grinding is relatively safe, but because the grinding wheel rotates from the back of the tooth to the edge, the blade is prone to burrs and burns.

 (2) Grinding wheel reverse grinding. The rotation of the grinding wheel has the tendency to disengage the front face of the reamer from the tooth support, and it is more difficult to hand the reamer when the blade is grinding, and accidents may even occur. Because the rotation direction of the grinding wheel is from the edge to the back of the tooth, the blade is free of burrs and is not easy to burn.

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