| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: reamer working part has rotational axis defining direction from front to rear and comprises front end, rear end and peripheral surface located there between. It includes, at least, two gage elements extending rearward from front end. Note here that peripheral surface between two adjacent gage elements makes peripheral part and, at least, one cutting part arranged nearby front end. It includes also cutting edge extending rearward from front end and radially outward peripheral surface to be formed at intersection of front and rear surfaces. Note that front surface is arranged mainly in tangential direction to face direction of rotation. It has first end extending from cutting edge, inclined surface adjoining front surface located mainly across the latter to extend from first end of cutting edge front surface. Inclined surface is located at acute axial angle to rotational axis so that its imaginary extension intersects rotational axis at the point ahead of working part. Inclined surface rear end is connected with peripheral surface nearby cutting part at a distance from working part rear end. ^ EFFECT: lower labour input. ^ 24 cl, 16 dwg |
