SU402456A1 - Honing head for pre-honing holes - Google Patents

Description

The invention relates to the field of mechanical engineering and can be used for pre-honing holes.

Honing heads are known for pre-honing holes, consisting of a housing, an expandable cone rod and pads with honing bars.

When using the known honing heads, the metal removal rate is reduced. Even with the use of coarse bars, the removed allowance usually does not exceed 0.3 mm per diameter.

The purpose of the invention is to eliminate the decay of metal removal by artificially raising the height of asperities on the surface to be treated.

The proposed honing head differs from the known ones in that on one or several pads the knurling rollers are installed with the possibility of free rotation. With a relatively low hardness of the material being processed, the knurling rollers can be made of hardened steel or hard alloy without attaching diamond or other grains to them. In this case, the razolovka consists of a housing 1, inside which there is an expanding conical rod 2, serving to unclamp the pads 3 with honing bars 4, and the pads 5 with knurling rollers 6 mounted on them for free rotation, depending on the type the processed material is cylindrical or other shape. The rollers 6 on the block 5 are installed using axles 7. To prevent the blocks 3 and 5 from falling out, spring rings 8 are used.

The honing head works as follows.

After inserting the head into the machined hole, the expanding rod 2 under the action of external force pushes the pads 3 and 5 with the honing stones 4 and the rolling rollers 6 arranged on them, respectively, until they come into contact with the surface to be machined. Rotation and reciprocating movement of the head relative to the workpiece leads to rolling of the entire surface to be treated with knurling rollers 6, as a result of which a roughness is artificially created on it, which contributes to the subsequent intensive removal of metal by honing bars.

pads 3 and 5 under the influence of the spring ring 8 deviate from the treated surface.

Subject invention

A honing head for pre-honing holes, consisting of

casing, expanding conical stem and blocks with honing sticks, characterized in that, in order to eliminate metal removal by attenuation by artificially raising the height of micro irregularities, on the treated surface on one or several pads are installed with the possibility of free turning, rolling rollers.