US2767523A - Grinding wheel - Google Patents

Grinding wheel Download PDF

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Publication number
US2767523A
US2767523A US540450A US54045055A US2767523A US 2767523 A US2767523 A US 2767523A US 540450 A US540450 A US 540450A US 54045055 A US54045055 A US 54045055A US 2767523 A US2767523 A US 2767523A
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segments
bushing
discoidal
abrasive
wheel
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US540450A
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George R Vasbinder
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental

Definitions

  • This invention relates to grinding or similar abrasive wheels having means for radial expansion whereby the efiective working or abrading diameter of the wheel may be selectively adjusted or varied.
  • the present invention provides an abrasive wheel wherein the peripheral grinding or abrading portion of the wheel is made up of a plurality of segments which are mounted and guided for joint radial inward and outward movement, whereby the effective diameter of the working surface portion of the wheel may be varied at will between predetermined limits. Furthermore, the arrangement of the present invention is such that the inward and outward radial adjusting movements of the several abrasive segments are controlled and guided in such manner that the movements are directly radial and without any possibility or likelihood of angular or other movements which would tend to disturb or disrupt the general circularity of the abrasive surface.
  • the wheel of the present invention is further so arranged that the radial movements of the several segments are accurately synchronized and take place jointly upon a single adjusting movement or manipulation, each segment moving straight out or in in a radial direction in the same degree as all other segments and with no bodily inclination, cocking or other misalignment.
  • Fig. 1 is a general side elevational view of one form of the abrasive wheel of the present invention with portions thereof broken away for added illustration;
  • Fig. 2 is a cross-sectional view taken approximately on the line IIII of Fig. 1;
  • Fig. 3 is a fragmentary plan view of the abrasive wheel of Fig. 1 showing one of the abrasive segments thereof;
  • Fig. 4 is a fragmentary view looking at the abrasive surface of a modified form of the abrasive wheel of the present invention.
  • the numeral designates a central atent ice supporting bushing for the grinding wheel assembly generally.
  • a pair of discoidal members 11 and 12 are mounted on bushing 10 for free rotation and a pair of clamp rings or flanges 13 and 14 are threaded onto the opposite ends of bushing 10 in such manner that they may bear in clamping relation against the external surfaces of discoidal members 11 and 12.
  • the numeral 15 designates generally one of a series of segmental members, each comprising an abrasive block portion 16 and a mounting and clamping portion.
  • the mounting or clamping portion comprises a pair of clamping blocks 18 and 19 which are removably held in the relationship shown in Fig. 2 by a screw'20 which passes through block 19 and threads into block 18.
  • the clamping blocks 18 and 19 form a channel for receiving the abrasive block 16.
  • the clamping blocks 18 and 19 and the abrasive block 16 are provided with complementary tongue and groove formations as at 21 so that the abrasive block 16 is clamped within the channel formed by blocks 18 and 19 in an interlocking manner.
  • Clamping block 19 is formed with a radially extending key formation 24 which fits slidably in a complementary groove formation in discoidal member 11, the latter being formed with a plurality of radiating equally spaced grooves for receiving the keys 24 of each of the clamping blocks 19.
  • the assembly comprising the blocks 18 and 19 and abrasive member 16 is thus guided for radial bodily movement between the discoidal members 11 and 12.
  • hub member 10 is externally flatted as at 34 and flange member 14 is provided with a hexagonal hub formation 35.
  • the flat 34 and hexagonal hub formation 35 are engaged by wrenches or the like to tighten and loosen flange member 14 to clamp and unclamp the segment clamping blocks 18 and 19 between discoidal members 11 and 12. With this clamping relationship loosened one may grasp any of the segments 15 and rotate the same relative to hub member 10, which relative rotation will move the segments radially inward or outward, depending on the direction of relative rotation. The segments will move synchronously since each link 28 will receive the same degree of angular adjustment as the others.
  • Fig. 4 shows fragmentarily a modified arrangement of the abrasive block portions or segment portions of the grinding wheel of the present invention.
  • the details of construction not shown in Fig. 4 are the same as in Figs. 1, 2 and 3.
  • the numerals 41 and 42 designate a pair of discoidal members similar to the discoidal members 11 and 12 of the preceding embodiment.
  • abrasive block portions of the segment members are designated 43 and it will be noted that their facing ends are cut off obliquely (or helically) with respect to the periphery of the abrasive wheel generally. This produces an overlapping action as between the abrasion effected or produced by the several successive segments, much in the manner. of the helical cutting fiutes of a helical milling cutter.
  • a central supporting bushing a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said bushing and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at it outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means relative to said bushing to maintain a desired radial adjustment of said segments.
  • a central supporting bushing a plurality of circularly arranged abrading segments, discoidal means rotatably mounted on said bushing and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means and said segments against relative movement to maintain a desired radial adjustment of said segments.
  • a central supporting bushing a plurality of circumferentially arranged abrasive segments, a pair of discoidal members rotatably mounted on said bushing to engage opposite sides of said segments and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means relative to said bushing to maintain a desired radial adjustment of said segments.
  • a central supporting bushing a plurality of circumferentially arranged abrasive segments, a pair of discoidal members rotatably mounted on said bushing to engage opposite sides of said segments and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and re-.
  • a central supporting member a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said bushing and having guiding formations for guiding said segments for radial sliding movement toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing for angular movement in the plane of said wheel and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing project and retracts said segments jointly in a radial direction, and means selectively and releasably securing said segments to maintain a desired radial adjustment thereof.
  • a central support member bushing a plurality of circumferentially arranged abrasive seg ments, discoidal means rotatably mounted on said support member and having radially extending guiding formations for guiding said segments toward and away from said support member, a plurality of links each pivoted at its inner end to said support member and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said support member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said support member for selectively and releasably securing said discoidal means relative to said segments to maintain a desired radial adjustment of said segments.
  • a central support member bushing a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said support member and having radially extending guiding formations for guiding said segments toward and away from said support member, a plurality of links each pivoted at its inner end to said support member and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said support member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said support member for selectively and releasably securing said segments against radial movement.
  • a central supporting member a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said support member projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said rotatably mounted means relative to said supporting member to maintain a desired radial adjustment of said segments.
  • a central supporting member a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said supporting member projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said rotatably mounted means and said segments against relative movement to maintain a desired radial adjustment of said segments.
  • a central supporting mem ber a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said supporting member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said supporting member for securing said rotatably mounted means relative to said segments to maintain radial adjustment of the latter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Oct. 23, 1956 G. R. VASBINDER GRINDING WHEEL Filed Oct. 1 4, 1955 GEORGE/P. lass/Nob? BY @w,M,Mf@ -1 A TTORNEYS.
rates This invention relates to grinding or similar abrasive wheels having means for radial expansion whereby the efiective working or abrading diameter of the wheel may be selectively adjusted or varied.
It is well known that grinding and other abrasive wheels having a peripheral grinding or abrading surface decrease in diameter progressively as work proceeds and the abrasive material wears away. In some kinds of grinding and abrading operations this decrease in diameter is of no particular significance but in others the decrease in diameter is intolerable and often necessitates employing some other, and frequently more expensive or less satisfactory, method or means for effecting a given grinding or abrading operation.
Apart from the matter of wear and consequent change in diameter, certain jobs may require the use of a wheel of a certain effective diameter, by reason of which the ability to adjust or vary the effective abrading diameter or radius is of great practical value.
The present invention provides an abrasive wheel wherein the peripheral grinding or abrading portion of the wheel is made up of a plurality of segments which are mounted and guided for joint radial inward and outward movement, whereby the effective diameter of the working surface portion of the wheel may be varied at will between predetermined limits. Furthermore, the arrangement of the present invention is such that the inward and outward radial adjusting movements of the several abrasive segments are controlled and guided in such manner that the movements are directly radial and without any possibility or likelihood of angular or other movements which would tend to disturb or disrupt the general circularity of the abrasive surface.
The wheel of the present invention is further so arranged that the radial movements of the several segments are accurately synchronized and take place jointly upon a single adjusting movement or manipulation, each segment moving straight out or in in a radial direction in the same degree as all other segments and with no bodily inclination, cocking or other misalignment.
Various other objects and advantages incident upon use of the abrading or grinding wheel of the present invention will appear from a study of the following specification and the accompanying drawing. However, it is to be understood that the embodiments set forth in the specification and illustrated in the drawing are by way of example only and that the principles of the present invention are not limited thereto or otherwise than as defined in the appended claims.
In the drawing:
Fig. 1 is a general side elevational view of one form of the abrasive wheel of the present invention with portions thereof broken away for added illustration;
Fig. 2 is a cross-sectional view taken approximately on the line IIII of Fig. 1;
Fig. 3 is a fragmentary plan view of the abrasive wheel of Fig. 1 showing one of the abrasive segments thereof; and
Fig. 4 is a fragmentary view looking at the abrasive surface of a modified form of the abrasive wheel of the present invention.
Like characters of reference denote like parts throughout the several figures of the drawing and, referring particularly to Fig. 2, the numeral designates a central atent ice supporting bushing for the grinding wheel assembly generally. A pair of discoidal members 11 and 12 are mounted on bushing 10 for free rotation and a pair of clamp rings or flanges 13 and 14 are threaded onto the opposite ends of bushing 10 in such manner that they may bear in clamping relation against the external surfaces of discoidal members 11 and 12.
The numeral 15 designates generally one of a series of segmental members, each comprising an abrasive block portion 16 and a mounting and clamping portion. As shown in Fig. 2 the mounting or clamping portion comprises a pair of clamping blocks 18 and 19 which are removably held in the relationship shown in Fig. 2 by a screw'20 which passes through block 19 and threads into block 18. As thus arranged the clamping blocks 18 and 19 form a channel for receiving the abrasive block 16. The clamping blocks 18 and 19 and the abrasive block 16 are provided with complementary tongue and groove formations as at 21 so that the abrasive block 16 is clamped within the channel formed by blocks 18 and 19 in an interlocking manner.
Clamping block 19 is formed with a radially extending key formation 24 which fits slidably in a complementary groove formation in discoidal member 11, the latter being formed with a plurality of radiating equally spaced grooves for receiving the keys 24 of each of the clamping blocks 19. The assembly comprising the blocks 18 and 19 and abrasive member 16 is thus guided for radial bodily movement between the discoidal members 11 and 12.
Radial inward and outward movement of the segment members 15 is controlled by a series of links 28 which act between bushing 10 and the blocks 18 of the segments. An external annular flange 29 is formed on bushing 10 and an internal annular flange 30 is provided on clamping block 18. The opposite ends of the several links 28 are bifurcated as clearly shown in Fig. 2 and pivotally engage the flanges 29 and 30 as at 31 and 32.
One end of hub member 10 is externally flatted as at 34 and flange member 14 is provided with a hexagonal hub formation 35. The flat 34 and hexagonal hub formation 35 are engaged by wrenches or the like to tighten and loosen flange member 14 to clamp and unclamp the segment clamping blocks 18 and 19 between discoidal members 11 and 12. With this clamping relationship loosened one may grasp any of the segments 15 and rotate the same relative to hub member 10, which relative rotation will move the segments radially inward or outward, depending on the direction of relative rotation. The segments will move synchronously since each link 28 will receive the same degree of angular adjustment as the others.
As the parts are shown in Fig. 1 and Fig. 2 the segments 15 are in their innermost radial position since the abrasive blocks 16 are abutting the external peripheries of the discoidal members 11 and 12. If the segments 15 be moved in a counterclockwise direction relative to hub 10, as viewed in Fig. 1, the links 28 will tend to assume a more erect or more nearly radial position which will move all of the segments 15 radially outwardly in like degree, their movements being guided by the key formation 24 and the complementary groove in clamp block 19.
Fig. 4 shows fragmentarily a modified arrangement of the abrasive block portions or segment portions of the grinding wheel of the present invention. The details of construction not shown in Fig. 4 are the same as in Figs. 1, 2 and 3. Referring to Fig. 4, the numerals 41 and 42 designate a pair of discoidal members similar to the discoidal members 11 and 12 of the preceding embodiment.
In Fig. 4 the abrasive block portions of the segment members are designated 43 and it will be noted that their facing ends are cut off obliquely (or helically) with respect to the periphery of the abrasive wheel generally. This produces an overlapping action as between the abrasion effected or produced by the several successive segments, much in the manner. of the helical cutting fiutes of a helical milling cutter.
In grinding flat surfaces the segments 43 of the embodiment of Fig. 4 will overlap in their action in an obvious manner to produce a smoother, grinding action and, therefore, a smoother surface.
I claim:
1. In a grinding wheel, a central supporting bushing, a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said bushing and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at it outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means relative to said bushing to maintain a desired radial adjustment of said segments.
2. In an abrasive wheel, a central supporting bushing, a plurality of circularly arranged abrading segments, discoidal means rotatably mounted on said bushing and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means and said segments against relative movement to maintain a desired radial adjustment of said segments.
3. In a grinding wheel, a central supporting bushing, a plurality of circumferentially arranged abrasive segments, a pair of discoidal members rotatably mounted on said bushing to engage opposite sides of said segments and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means relative to said bushing to maintain a desired radial adjustment of said segments.
4. In an abrading wheel, a central supporting bushing, a plurality of circumferentially arranged abrasive segments, a pair of discoidal members rotatably mounted on said bushing to engage opposite sides of said segments and having radially extending guiding formations for guiding said segments toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing projects and re-.
tracts said segments jointly in a radial direction, and means selectively and releasably securing said discoidal means and said segment against relative movement to maintain a desired radial adjustment of said segments.
5. In an abrading wheel, a central supporting member, a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said bushing and having guiding formations for guiding said segments for radial sliding movement toward and away from said bushing, a plurality of links each pivoted at its inner end to said bushing for angular movement in the plane of said wheel and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said bushing project and retracts said segments jointly in a radial direction, and means selectively and releasably securing said segments to maintain a desired radial adjustment thereof.
6. In a grinding wheel, a central support member bushing, a plurality of circumferentially arranged abrasive seg ments, discoidal means rotatably mounted on said support member and having radially extending guiding formations for guiding said segments toward and away from said support member, a plurality of links each pivoted at its inner end to said support member and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said support member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said support member for selectively and releasably securing said discoidal means relative to said segments to maintain a desired radial adjustment of said segments.
7. In an abrading wheel, a central support member bushing, a plurality of circumferentially arranged abrasive segments, discoidal means rotatably mounted on said support member and having radially extending guiding formations for guiding said segments toward and away from said support member, a plurality of links each pivoted at its inner end to said support member and at its outer end to one of said segments whereby joint rotation of said segments and said discoidal means relative to said support member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said support member for selectively and releasably securing said segments against radial movement.
8. In an abrading wheel, a central supporting member, a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said support member projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said rotatably mounted means relative to said supporting member to maintain a desired radial adjustment of said segments.
9. In an abrading wheel, a central supporting member, a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said supporting member projects and retracts said segments jointly in a radial direction, and means selectively and releasably securing said rotatably mounted means and said segments against relative movement to maintain a desired radial adjustment of said segments.
10. In an abrading wheel, a central supporting mem ber, a plurality of circumferentially arranged abrading segments, means mounted for rotation relative to said supporting member and having radially extending guiding formations for guiding said segments for radial inward and outward movement, a plurality of links each pivoted at its inner end to said supporting member and at its outer end to one of said segments whereby joint rotation of said segments and said rotatably mounted means relative to said supporting member projects and retracts said segments jointly in a radial direction, and means having threaded engagement with said supporting member for securing said rotatably mounted means relative to said segments to maintain radial adjustment of the latter.
No references cited.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939250A (en) * 1957-01-31 1960-06-07 Micromatic Hone Corp Resonant honing
US4439090A (en) * 1980-11-19 1984-03-27 Gildemeister Ag Workpiece handling apparatus
US5044126A (en) * 1986-10-01 1991-09-03 Rotrafer S.P.A. Tangential grinding machine
US20110287701A1 (en) * 2010-05-18 2011-11-24 Raleigh Corporation Pty Ltd Portable Wheel Rim Polisher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939250A (en) * 1957-01-31 1960-06-07 Micromatic Hone Corp Resonant honing
US4439090A (en) * 1980-11-19 1984-03-27 Gildemeister Ag Workpiece handling apparatus
US5044126A (en) * 1986-10-01 1991-09-03 Rotrafer S.P.A. Tangential grinding machine
US20110287701A1 (en) * 2010-05-18 2011-11-24 Raleigh Corporation Pty Ltd Portable Wheel Rim Polisher
US8668556B2 (en) * 2010-05-18 2014-03-11 Raleigh Corporation Pty Ltd Portable wheel rim polisher

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