Claims
- 1. In a lapping machine comprising a rotatable spindle, a lapping tool connected to said spindle and an axially displaceable expansion rod operable to vary the diameter of said tool, the improvement wherein said tool comprises:
- an elongated tubular member having a working portion formed at one end thereof with a substantially cylindrical abrasive external surface and a frustoconical internal surface, at least said working portion being provided with at least one slot throughgoing between said surfaces and elongated along a generatrix;
- a control rod having a frustoconical portion axially slidable within said working portion and cooperating with said frustoconical internal surface for adjusting the diameter of said working portion by relative axial displacement of said rod and said member;
- means for connecting said tubular member to said expansion rod, said means for connecting said tubular member to said expansion rod including a support tube coaxially surrounding said control rod, a key fixed to said support tube and passing through said expansion rod and longitudinal slots of said control rod and a screwthread coupling between said tubular member and said support tube for axially adjusting said working portion of said tubular member relative to said control rod; and
- means for fixing said control rod to said spindle to prevent axial movement of the frustoconical portion of said control rod during rotation of said tubular member by said spindle and axial displacement of said expansion rod to adjust the diameter of said working portion.
- 2. In a lapping machine comprising a rotatable spindle, a lapping tool connected to said spindle and an axially displaceable expansion rod operable to vary the diameter of said tool, the improvement wherein said tool comprises:
- an elongated tubular member having a working portion formed at one end thereof with a substantially cylindrical abrasive external surface and a frustoconical internal surface, at least said working portion being provided with at least one slot throughgoing between said surfaces and elongated along a generatrix;
- a control rod having a frustoconical portion axially slidable within said working portion and cooperating with said frustoconical internal surface for adjusting the diameter of said working portion by relative axial displacement of said rod and said member;
- means for connecting said tubular member to said expansion rod, said means for connecting said tubular member to said expansion rod including a support tube coaxially surrounding said control rod and a screwthread coupling between said tubular member and said support tube for axially adjusting said working portion of said tubular member relative to said control rod; and
- means for fixing said control rod to said spindle to prevent axial movement of the frustoconical portion of said control rod during rotation of said tubular member by said spindle and axial displacement of said expansion rod to adjust the diameter of said working portion, said support tube being provided with a locking sleeve slidably mounted thereon and formed with an axially projecting finger, a notched collar formed on said tubular member adjacent said sleeve and a resilient member operatively cooperating with said sleeve to displace same relative to said support tube and toward said notched collar for the engagement of said finger therein, said support tube being provided with a peg having a free end slidable in a slot formed in said sleeve for angular immobiliation of said sleeve relative to said support tube, said slot being L-shaped and having a portion extending perpendicular to the longitudinal axis of said tubular member.
- 3. The improvement defined in claim 2 wherein said at least one slot is a plurality of such slots are provided in said working portion along respective generatrices.
- 4. The improvement defined in claim 3 wherein said plurality of slots are angularly spaced all around said working portion.
- 5. The improvement defined in claim 4 wherein a respective row of said slots lie along each generatrix.
Priority Claims (1)
Number |
Date |
Country |
Kind |
77 33677 |
Nov 1977 |
FRX |
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Parent Case Info
This is a continuation of application Ser. No. 125,451, filed Feb. 25, 1980 and now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
324184 |
Aug 1920 |
DE2 |
Continuations (1)
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Number |
Date |
Country |
Parent |
125451 |
Feb 1980 |
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