Title:
HONING TOOLS
United States Patent 3672102
Abstract:
A honing tool has an abrasive stone fixed within a shell which is movable radially of the tool by means of an axially displacable wedge member. The shell comprises a channel of constant width and tapering depth which is formed from a sheet metal blank by pressing.
US Patent References:
Honing mandrel
Hasty - April 1947 - 2419136
Encased abrasive element
Kline - December 1941 - 2265377
Honing assembly including abrasive holder
McDonald - October 1968 - 3403481
Honing mandrel
Hasty - April 1947 - 2419136
Encased abrasive element
Kline - December 1941 - 2265377
Honing assembly including abrasive holder
McDonald - October 1968 - 3403481
Application Number:
05/080557
Publication Date:
06/27/1972
Filing Date:
10/14/1970
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Export Citation:
Primary Class:
International Classes:
B24B33/08; B24B33/00; B24B5/06; B24D17/00
Field of Search:
51/204,26R,338-345
Primary Examiner:
Kelly, Donald G.
Claims:
What I claim is
1. A shell for a honing stone comprising sidewalls and a base defining a channel of substantially constant width and tapering depth from one end to the other, said base of he channel being externally of cylindrical contour between said sidewalls and from which there is cut off by an inclined plane a segment the width of which decreases from substantially the full width of the shell at its shallow end to substantially zero at its deeper end.
2. A shell according to claim 1, wherein its base projects longitudinally beyond its sidewalls at one end to form a detent.
3. A shell according to claim 2, wherein the detent is at its deep end.
4. A shell according to claim 1, having a closure member at one of its ends.
5. A shell according to claim 4, wherein the closure member is a tab integral with the base and bent at an angle thereto.
6. A shell according to claim 3, having a closure member at its shallow end.
7. A shell according to claim 1, comprising a sheet metal pressing.
1. A shell for a honing stone comprising sidewalls and a base defining a channel of substantially constant width and tapering depth from one end to the other, said base of he channel being externally of cylindrical contour between said sidewalls and from which there is cut off by an inclined plane a segment the width of which decreases from substantially the full width of the shell at its shallow end to substantially zero at its deeper end.
2. A shell according to claim 1, wherein its base projects longitudinally beyond its sidewalls at one end to form a detent.
3. A shell according to claim 2, wherein the detent is at its deep end.
4. A shell according to claim 1, having a closure member at one of its ends.
5. A shell according to claim 4, wherein the closure member is a tab integral with the base and bent at an angle thereto.
6. A shell according to claim 3, having a closure member at its shallow end.
7. A shell according to claim 1, comprising a sheet metal pressing.
Description:
BACKGROUND OF THE INVENTION
The invention relates to honing tools, and more particularly to honing stone shells of the kind intended for use in a small diameter honing tool having a mandrel tube body in which the radial position of a single stone is controlled by means of an axially slidable wedge.
SUMMARY OF THE INVENTION
According to the invention, a shell for a honing stone comprises a channel of constant width and tapering depth.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings of which:
FIG. 1 is a part sectional side elevation of a stone-carrying mandrel tube body of a honing tool;
FIG. 2 is a section on the line 2--2 in FIG. 1;
FIG. 3 is a perspective view of a honing stone shell;
FIG. 4 is a view on one end of the shell;
FIG. 5 is a view on the other end of the shell; and
FIG. 6 is a view on the underside of the shell.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings, a hOning tool comprises a mandrel tube body 11 having a bore 17. The body 11 is provided with a radially projecting portion 12 having a curved guide surface 13. A rectangular slot 14 is formed radially of the body 11 diametrically opposite the surface 13, in which slot there is located stone 15, the radial position of which is controlled by an axially slidable wedge 16 housed within he bore 17. The honing stone 15 is of constant rectangular cross-section, and is secured by adhesive in a shell 18 consisting of a sheet metal pressing. Said shell comprises a channel of constant width and tapering depth, the inclination of its base being the same as that of the wedge and being, for example, 21/2° to the axis of the bore 17. The base of the shell 18 has the form of a semi-cylinder from which there is cut off by an inclined plane a segment 19 the width of which decreases (see FIG. 6) from the full width of the shell 18 at its shallow end (see FIG. 5) to zero at its deep end (see FIG. 4). An intermediate cross-section of the base of the shell 18 is shown in FIG. 2. The base of the shell 18 has two tabs 20 and 21. The tab 20 provides a closure member at the shallow end of the shell 18, and the tab 21 forms a detent to help retain the shell 18 in the slot 14 without preventing its insertion therein. The length (excluding the tab 21) and the breadth of the shell 18 are a close sliding fit in the slot 14.
When assembling a stone 15 into its shell 18, it is pressed down until it contacts the base of the shell at the shallow end and until it reaches the bottom of the full width section of the shell at the deep end, any surplus adhesive being squeezed out leaving the tapering space between the base of the stone and the base of the shell 18 filled with adhesive. The operative portion of the stone projects from the open top of the shell 18.
The shell has the advantage that it combines integrally and economically a tapered base for controlling the radial position of the stone with walls which rigidly contain the stone and keep it separate from the slot in the tube thus minimizing wear of said slot.
The invention relates to honing tools, and more particularly to honing stone shells of the kind intended for use in a small diameter honing tool having a mandrel tube body in which the radial position of a single stone is controlled by means of an axially slidable wedge.
SUMMARY OF THE INVENTION
According to the invention, a shell for a honing stone comprises a channel of constant width and tapering depth.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings of which:
FIG. 1 is a part sectional side elevation of a stone-carrying mandrel tube body of a honing tool;
FIG. 2 is a section on the line 2--2 in FIG. 1;
FIG. 3 is a perspective view of a honing stone shell;
FIG. 4 is a view on one end of the shell;
FIG. 5 is a view on the other end of the shell; and
FIG. 6 is a view on the underside of the shell.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings, a hOning tool comprises a mandrel tube body 11 having a bore 17. The body 11 is provided with a radially projecting portion 12 having a curved guide surface 13. A rectangular slot 14 is formed radially of the body 11 diametrically opposite the surface 13, in which slot there is located stone 15, the radial position of which is controlled by an axially slidable wedge 16 housed within he bore 17. The honing stone 15 is of constant rectangular cross-section, and is secured by adhesive in a shell 18 consisting of a sheet metal pressing. Said shell comprises a channel of constant width and tapering depth, the inclination of its base being the same as that of the wedge and being, for example, 21/2° to the axis of the bore 17. The base of the shell 18 has the form of a semi-cylinder from which there is cut off by an inclined plane a segment 19 the width of which decreases (see FIG. 6) from the full width of the shell 18 at its shallow end (see FIG. 5) to zero at its deep end (see FIG. 4). An intermediate cross-section of the base of the shell 18 is shown in FIG. 2. The base of the shell 18 has two tabs 20 and 21. The tab 20 provides a closure member at the shallow end of the shell 18, and the tab 21 forms a detent to help retain the shell 18 in the slot 14 without preventing its insertion therein. The length (excluding the tab 21) and the breadth of the shell 18 are a close sliding fit in the slot 14.
When assembling a stone 15 into its shell 18, it is pressed down until it contacts the base of the shell at the shallow end and until it reaches the bottom of the full width section of the shell at the deep end, any surplus adhesive being squeezed out leaving the tapering space between the base of the stone and the base of the shell 18 filled with adhesive. The operative portion of the stone projects from the open top of the shell 18.
The shell has the advantage that it combines integrally and economically a tapered base for controlling the radial position of the stone with walls which rigidly contain the stone and keep it separate from the slot in the tube thus minimizing wear of said slot.