Claims
- 1. An auxiliary member for use as a rotationally stationary support for a workpiece in grinding the internal bore of a rotatably driven workpiece in a grinding machine, said member comprising an annular ring having an external circumferentially extending projection dividing the ring into a first end portion for engaging a support and a second end portion for entering the bore in the workpiece, such that the axial cross section of the second end portion is that of a frustum of a cone tapering inwardly from said projection toward one end of the ring said auxiliary member having an arcuate recess formed in and extending around a portion of an internal circumferential wall of said ring to facilitate introduction of a grinding wheel into the internal space of the auxiliary member.
- 2. The member claimed in claim 1, wherein the internal wall of the ring also ascribes a frustum of a cone tapering outwardly toward an opposite end of the ring to guide a grinding tool.
- 3. The member claimed in claim 1, characterised thereby that the said recess extends over a substantial portion of the circumference of the circular internal wall of the ring.
- 4. The member claimed in claim 1 in combination with a support of a grinding machine, the grinding machine also including a chuck for holding a hollow cylindrical workpiece at one end of the workpiece while an opposite end of the workpiece is rotationally supported by said member, and a grinding tool for engaging bore of the workpiece through said member.
- 5. In combination, a grinding machine having a driven mechanism supporting one end of a workpiece having a cylindrical bore, said driven mechanism rotating the workpiece about the longitudinal axis of the bore and a grinder movable into grinding engagement with the interior surface of the bore in the workpiece through the other end of the workpiece, the improvement comprising a rotationally stationary auxiliary member engaging the other end of the workpiece, means supporting said auxiliary member in axial alignment with said bore in the workpiece, said auxiliary member comprising an annular ring having a bore therethrough through which the grinder may pass axially, said annular ring having one end portion telescoped into said bore in the workpiece, the external surface of said one end portion of said ring being frusto-conical to center said one end of said ring with respect to said bore in the workpiece when engaged therewith and during rotation of the workpiece in relation to said ring, the external surface of said ring inwardly of said frusto-conical portion being supported by said support means.
- 6. The combination as defined in claim 5 wherein said bore through said annular ring is defined by an internal surface extending therethrough and receiving said grinder, said internal surface including an arcuate recess extending inwardly from the smaller end of said frusto-conical external surface of said one end portion of said ring whereby the portion of the smaller end of the frusto-conical external surface having the recess therein will terminate longitudinally inwardly of the remaining portion of the smaller end of the frusto-conical external surface to provide the grinder access through the recess to the internal surface of the cylindrical bore in the workpiece to enable grinding said internal surface during rotation of the workpiece.
- 7. The combination as defined in claim 6 wherein the external surface of said ring includes a peripheral flange intermediate end portions thereof for engagement with said support means.
Priority Claims (1)
Number |
Date |
Country |
Kind |
93515 |
Feb 1990 |
ILX |
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Parent Case Info
This is a continuation-in-part of application Ser. No. 07/601,527, filed Oct. 23, 1990 now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0837564 |
Jun 1981 |
SUX |
0534102 |
Feb 1941 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
601527 |
Oct 1990 |
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