ブックタイトル切削工具総合カタログ　│　岡崎精工株式会社

概要

切削工具総合カタログ　│　岡崎精工株式会社

全品即納185Data技 術 資 料About the reamer processingThe reamer is a tool for surfacing the hole made by the drill or the press, and it gets the good hole of theprecision. In the reamer processing, it is necessary to confirm the following matter beforehand.1. A necessary finish hole diameter and the surface roughness2. Work material and the hardness3. Shape and the depth of the hole4. Machine plant, maintenance tool, cutting fluid, and processing restriction5. Amount of a hole needing processingAfter having considered the matter mentioned above, the reamer tool and the cutting condition that areappropriate for the processing should be decided. However, "2" "3" "4" greatly effect to obtain mostimportant above-mentioned "1". A general idea concerning the feature and the hole accuracy of the reamertool is described as follows. Please use it to select an appropriate reamer tool and the cutting conditiondepending on each working environment.Feature by blade shape of the reamerIn reamer processing, by the burnish effect with the peripheral cutting edge that surface roughness is good.The following is the difference of the feature and the effect according to the blade shape.1. Straight flute● It is most generally used.● The re-grinding is easy, and it is cheaper than the spiral flute.2. Spiral flute● In comparison with the straight flute, surface roughness generally improves by a burnish effect.● It is effective for the hole that has the ditch such as keyway.● There is helix left and right.A: Left helix● In comparison with the straight flute, surface roughness generally improves by a burnish effect.● Because cutting performance is a little inferior, it is effective in a soft work material.● When the hole is curving, it tends to follow the curve.B: Right helix● It is effective against a hard work material because it tends to cut into.● Because the cutting rubbish is raked out, it is suitable for stop hole processing.● When the hole is curving, it effects to set straight as against the left-helix.3. End cutting● When the stop hole is processed, it can process close to the bottom of the hole.● When the hole is curving, it effects to correct a curve.● Because it is easy to produce a crack and a breaking, in the case of an excessive depth of cut,attention is necessary.Final size after the reamer processingIt is “H7” of JIS standard to be used most generally in the demanded holes tolerance. "m5" of the outsidediameter allowance of the reamer used in that case is general. (Above-mentioned table-1 referred of theexcerpt from JIS standard.) However, it doesn't necessarily finish in the tolerance the same as the demandby various causes (a characteristic of work materials, the shape of the hole, a cutting condition, reamershape, and run out at the time of the installed reamer).Indication of cutting conditions and another conditionsIn the reamer work, because the change of a proper cutting condition is remarkable, the adjustment isneeded by the use machine and the working condition arbitrarily. Please use above-mentioned Table-2 asan only as a guide of general various conditions.123