Abrading – Precision device or process - or with condition responsive... – Computer controlled
Reexamination Certificate
2004-02-23
2008-07-01
Hail, III, Joseph J. (Department: 3723)
Abrading
Precision device or process - or with condition responsive...
Computer controlled
C451S056000, C451S057000, C451S058000, C451S008000, C451S049000
Reexamination Certificate
active
07393261
ABSTRACT:
The invention relates to a grinding method and to a cylindrical grinding machine, in which a sintered hard metal round rod is completely pushed through a chuck of a workpiece spindle head, said chuck having chuck jaws. Two backrest seats are ground on the freely projecting end area of the round rod, and two backrests are then placed on the round rod in directions. The resulting secure support of the end area enables a front cone to be ground with a high level of precision with regard to the concentricity at the end of the round rod facing the quill of a tailstock. A multiple grinding wheel, which is comprised of two differently designed individual wheels that directly rest against one another in an axial manner, serves to grind the front cone and is advanced toward the round rod in the X-direction. The multiple grinding wheel is mounted in a grinding spindle. The individual wheels have different grinding areas. After the front cone has been ground, it is lodged in a hollow punch at the front end of the quill, whereby the quill is displaced toward the front cone in the direction of arrow. The end area of the round rod is hereby optimally fixed at both ends without the first fixing of the chuck having to be released. In this state, the desired cylindrical grinding final contour of the end area can be produced by cylindrical grinding. This procedure is particularly advantageous for producing hard metal tools. By working the rod with a single chucking, machining can be carried out both economically and without the risk of radial deviations. The different individual wheels of the multiple grinding wheel can serve additional different grinding tasks. When the end area has reached the desired concentric final contour, it is cut off from the round rod by the individual wheel.
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“Komplett in einer Aufspannung schleifen” Werkstatt und Betrieb, Carl Hanser Verlag., Muenchen, Germany Bd. 132, Nr. 5, Mai 1999.
Erwin Junker Maschinenfabrik GmbH
Hail III Joseph J.
Jordan and Hamburg LLP
Scruggs Robert
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