B - Operations – Transporting – 24 – B
Patent
B - Operations, Transporting
24
B
B24B 5/14 (2006.01) B24B 27/00 (2006.01) B24B 41/02 (2006.01) B24B 41/06 (2006.01)
Patent
CA 2491686
Disclosed are a method and a device for grinding a machine part (17) that comprises two shaft elements (18, 19) and a central element (20) having a significantly increased diameter (D). The central element (20) is provided with an effective surface (22), a portion of which is embodied in the form of a flat truncated cone (21). In order to grind the excess material (25) off the effective surface (22), the machine part (17) is clamped between pins (6, 7) that are provided with shafts (4, 5), the shaft (5) located at the tailstock (3) being supported by a steady rest (27). The machine part (17) is movable in the direction of the longitudinal axis (23) thereof. The effective surface (22) of the machine part (17) can be placed against the grinding disk (15) at the line of contact (28), vertical grinding being done by means of the cylindrical outer contour of the first grinding disk (15) such that the cutting speed is constant across the entire axial dimension of the first grinding disk (15) and a very good grinding result is obtained. The first grinding disk (15) is mounted in a floating manner on a grinding spindle (14) along with a second, narrower grinding disk (16). The second grinding disk (16) can be brought into an operating position, in which the cylindrical peripheral areas of the machine part are to be machined by means of longitudinal grinding, by swiveling the spindle (14) about two swiveling axes that are located perpendicular to each other and by displacing the grinding spindle (14) perpendicular to the longitudinal axis (23), the machine part remaining in the same clamped position. The inventive working method results in shortened cycle times while providing for a very good grinding result.
L'invention concerne un procédé et un dispositif pour rectifier un élément de machine (17) constitué de deux parties axiales (18, 19) et d'une partie médiane (20) de diamètre D nettement supérieur. La partie médiane (20) comporte une surface active (22) présentant sur une partie la forme d'un cône tronqué (21) plat. Pour usiner la quantité à rectifier (25) sur la surface active (22), l'élément de machine (17) est inséré entre des extrémités (6, 7) de tiges (4, 5), la tige (5) disposée au niveau de la contre-pointe (3) étant soutenue par une lunette (27). L'élément de machine (17) est déplacé dans le sens de son axe longitudinal (23) et la ligne de contact (28) de sa surface active (22) est approchée contre la meule (15). Il est ainsi possible de réaliser un meulage vertical avec le contour extérieur cylindrique de la première meule (15), la vitesse de coupe sur l'ensemble de la surface axiale de la première meule (15) étant constante, d'où une rectification de très bonne qualité. La première meule (15) et une deuxième meule (16) plus étroite sont logées mobiles sur une broche porte-meule (14). Faire pivoter cette broche (14) autour de deux axes mutuellement perpendiculaires et déplacer ladite broche (14) perpendiculairement à l'axe longitudinal (23) permet de mettre la deuxième meule (16) en une position de travail, dans laquelle les parties extérieures cylindriques de l'élément de machine sont usinées par meulage longitudinal, l'élément de machine (17) restant alors dans la même fixation. Le procédé de l'invention permet d'exécuter un très bon meulage à des cadences de production plus rapides.
Erwin Junker Maschinenfabrik Gmbh
Fetherstonhaugh & Co.
LandOfFree
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