US2425368A - Abrasive disk unit - Google Patents

Abrasive disk unit Download PDF

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Publication number
US2425368A
US2425368A US586859A US58685945A US2425368A US 2425368 A US2425368 A US 2425368A US 586859 A US586859 A US 586859A US 58685945 A US58685945 A US 58685945A US 2425368 A US2425368 A US 2425368A
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United States
Prior art keywords
slots
studs
abrasive disk
backing plate
enlarged
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Expired - Lifetime
Application number
US586859A
Inventor
Albert J Doermann
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Titan Abrasives Co
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Titan Abrasives Co
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Publication date
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Priority to US586859A priority Critical patent/US2425368A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • This invention relates to abrasive disk units and more particularly to an arrangement whereby an abrasive disk assembly may be easily and quickly attached to and detached from its backing.
  • Abrasive disks are usually either fixedly mounted on backings at the factory or must be attached to said backings at the place of use by a large number of nuts and bolts or other fastening devices. In the first place, the backings must be returned to the factory to have new disks mounted thereon. In the second, a great deal of time and many operations are necessary to remove and replace the disks.
  • My invention permits the mounting of the disk on the backing at the place of use with but two simple operations, and but one looking action is necessary to hold it there.
  • Another feature of my invention is the provision of means for tightening a plurality of fastening devices with a single movement of the device to which th'ey are attached. Another feature is means facilitating an easy start to such movement. Another feature is to provide a backing plate for an abrasive disk which may be reversibly mounted on a shaft and which therefore may be used with shafts rotating in opposite directions.
  • Fig. 1 is a side View, partly in section, of an abrasive disk mounted on a metal backing on the driving flange or wheel collar of a machine shaft;
  • Fig. 2 is a view taken as indicated by the line 22 of Fig. 1 with a portion in cross section;
  • Fig. 3 is a fragmentary View taken on the line- 33 of Fig. 1.
  • Fig. 4 is an enlarged cross sectional view taken on the line 4-4 of Fig. 2;
  • Fig. 5 is a view taken as indicated by the line 5-5 of Fig. 4.
  • I indicates a disk of metal or other suitable material providing a backing plate for an abrasive disk assembly II (here shown as a single disk, although a segmental assembly is conventional in large grinders) which is molded of silicon of carbide, aluminum oxide or similar abrasive including emery, corundum, and the like.
  • the backing I0 is provided with a plurality of slots I2 enlarged at one end I3 for the reception of the heads I4 of studs I attached to nuts I6 molded into the disk II.
  • the balance of the slot is of a width sufliciently larger than the body part of the studs I5 so that the studs may fit snugly therein but without binding.
  • Washers II having flaring, corrugated or scalloped flanges I8, are also molded into the back of the wheel II, and with their openings aligned with the openings in the nuts I6.
  • a suitable cement I9 may be used to more securely anchor the washer and nut in the abrasive disk II.
  • each stud I5 (shown as a stud bolt in the particular embodiment illustrated) is provided with a shoulder 20 above its threaded end portion and with another shoulder 2I spaced from the head I4.
  • a split washer 22 is pinched around the stem above this shoulder 2
  • the edges of the slots I I are cut so that they taper outwardly and slope downwardly from their mid portion to the enlarged portion I3 thereby forming inclined portions 24 which terminate at the enlarged end portion I3 of the slots.
  • the backing plate is also provided with holes 25 countersunk on top and bottom for the reception of bolts 26 adapted to be extended into threaded openings 21 in'the driving flange or wheel collar 28 of the shaft 29 on the machine with which the device is used to attach the assembly to said shaft.
  • Hole v3! extending from the outereircumferential edge'3l of the backing plate III to one of the slots I2 therein, is provided for the reception of lock screw 32 having tapered end '33.
  • the abrasive disk and its studs are adapted to be made and assembled at the factory.
  • Each stud I5 is provided with its head I4, spring 23, and split washer 22, and is then threaded into the nut I6 until the shoulder 20 contacts the washer I? which limits its further movement.
  • the disk can be quickly 'mounted on the metal backing plate byinserting the studs I 5 through the enlarged portions of the slots.
  • of the studs and the split washers 22 arelslightly above the ends of the inclined portions 24 of the slots.
  • the split washer with the spring pressing against it provides limited play (as for example three hundredths of an inch in a two foot diameter assembly I have built embodying these inventions) to take up variations in thickness of the mounting plate and the length of the studs.
  • the abrasive disk is then rotated to move the studs I5 in the slots II until the studs contact the opposite ends 34 of the slots where they are held in place by the action of the springs forcing &
  • the tapered end of the lock screw will force or jack them against such wall when it is tight- 7 ened.
  • the inclined edges of the slots permit an easy starting movement of the abrasive disk, as the action of the springs does not take effect until the split washers 23 contact the inclined'p'ortion 24 which does not occur until the disk has acquired some momentum.
  • edges of' the slots are cut to form inclined portions on both faces'of the backing plate and the center holes 26 of the backing are countersunk at both ends.
  • This provides for reversible mounting of the abrasive disks on the backing plate so that the plate may always be driven in the same direction relative to the slots, i. e. the enlarged end of the slot will always lead regardless of the direction of movement of the driving shaft.
  • This serves as an additional anchoring means because movement of the abrasive disk due to frictional resistance while grinding will force the studs [5 against the end wall 34 of the slots and none of this force is exerted against the lock screw.
  • the abrasive disk maybe easily and quickly placed on the backing plate and forced into the desired working position thereon whereby a plurality of studs are locked into position with one movenient and secured in such position with the locking action.
  • the disk may be just as quickly replaced without removing the backing from'the machine.
  • many men and machine hours are saved in mounting the disks on the backing plate and but one backing plate is necessar for each size of disk.
  • An abrasive disk unit comprising: backing plate means providedv with a plurality of slots;
  • an'abrasive disk assembly having studs with enlarged heads extending from the rear'face thereof, said slots having enlarged ends for receiving is capable.
  • a device as claimed in claim l'in which the clamping means is a washer and spring around the studs and adjacent the'heads thereof.
  • An abrasive disk unit comprising; a backing plate means provided with'a plurality of slots each'havin'g an enlarged end portion, the edge of said slots tapering toward said enlarged end; an
  • abrasive disk assembly having studs with enlarged heads each having a shoulder spaced from said head and lying above the end of said tapered edges of the slots when the studs are inserted into the slots; a washer on each of said shoulders; and a spring around each stud between the head and washer to force the washer against the shoulder.
  • An abrasive disk unit comprising: i an abrasive disk assembly having studs with en-' larged heads extending from one face thereof;

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

Description

Aug. 12, 1947. DQERMANN 2,425,368
ABRASIVE DISK UNIT Filed April 5, 1945 2 Sheets-Shed 2 Patented Aug. 1947 A UNITED ABRASIVE DISK UNIT Albert J. Doermann, Chicago, Ill., assignor to Titan Abrasives Company, a corporation of Illinois Application April 6, 1945, Serial No. 586,859
7 Claims. 1
This invention relates to abrasive disk units and more particularly to an arrangement whereby an abrasive disk assembly may be easily and quickly attached to and detached from its backing.
Abrasive disks are usually either fixedly mounted on backings at the factory or must be attached to said backings at the place of use by a large number of nuts and bolts or other fastening devices. In the first place, the backings must be returned to the factory to have new disks mounted thereon. In the second, a great deal of time and many operations are necessary to remove and replace the disks. My invention permits the mounting of the disk on the backing at the place of use with but two simple operations, and but one looking action is necessary to hold it there.
Another feature of my invention is the provision of means for tightening a plurality of fastening devices with a single movement of the device to which th'ey are attached. Another feature is means facilitating an easy start to such movement. Another feature is to provide a backing plate for an abrasive disk which may be reversibly mounted on a shaft and which therefore may be used with shafts rotating in opposite directions.
Other features and advantages of the invention will appear more fully as I proceed with the specification.
In the form of device embodying the features of my invention shown in the accompanying drawings,
Fig. 1 is a side View, partly in section, of an abrasive disk mounted on a metal backing on the driving flange or wheel collar of a machine shaft;
Fig. 2 is a view taken as indicated by the line 22 of Fig. 1 with a portion in cross section;
Fig. 3 is a fragmentary View taken on the line- 33 of Fig. 1.
Fig. 4 is an enlarged cross sectional view taken on the line 4-4 of Fig. 2; and
Fig. 5 is a view taken as indicated by the line 5-5 of Fig. 4.
As shown in the drawings, I indicates a disk of metal or other suitable material providing a backing plate for an abrasive disk assembly II (here shown as a single disk, although a segmental assembly is conventional in large grinders) which is molded of silicon of carbide, aluminum oxide or similar abrasive including emery, corundum, and the like.
The backing I0 is provided with a plurality of slots I2 enlarged at one end I3 for the reception of the heads I4 of studs I attached to nuts I6 molded into the disk II. The balance of the slot is of a width sufliciently larger than the body part of the studs I5 so that the studs may fit snugly therein but without binding. Washers II, having flaring, corrugated or scalloped flanges I8, are also molded into the back of the wheel II, and with their openings aligned with the openings in the nuts I6. A suitable cement I9 may be used to more securely anchor the washer and nut in the abrasive disk II.
The stem of each stud I5 (shown as a stud bolt in the particular embodiment illustrated) is provided with a shoulder 20 above its threaded end portion and with another shoulder 2I spaced from the head I4. A split washer 22 is pinched around the stem above this shoulder 2| and pressed around the shoulder by means of spring '23. The edges of the slots I I are cut so that they taper outwardly and slope downwardly from their mid portion to the enlarged portion I3 thereby forming inclined portions 24 which terminate at the enlarged end portion I3 of the slots.
The backing plate is also provided with holes 25 countersunk on top and bottom for the reception of bolts 26 adapted to be extended into threaded openings 21 in'the driving flange or wheel collar 28 of the shaft 29 on the machine with which the device is used to attach the assembly to said shaft. Hole v3!], extending from the outereircumferential edge'3l of the backing plate III to one of the slots I2 therein, is provided for the reception of lock screw 32 having tapered end '33.
The abrasive disk and its studs are adapted to be made and assembled at the factory. Each stud I5 is provided with its head I4, spring 23, and split washer 22, and is then threaded into the nut I6 until the shoulder 20 contacts the washer I? which limits its further movement. When received by theuser, the disk can be quickly 'mounted on the metal backing plate byinserting the studs I 5 through the enlarged portions of the slots. When this is done, the shoulders 2| of the studs and the split washers 22 arelslightly above the ends of the inclined portions 24 of the slots. The split washer with the spring pressing against it provides limited play (as for example three hundredths of an inch in a two foot diameter assembly I have built embodying these inventions) to take up variations in thickness of the mounting plate and the length of the studs.
The abrasive disk is then rotated to move the studs I5 in the slots II until the studs contact the opposite ends 34 of the slots where they are held in place by the action of the springs forcing &
wall 34 of the slots by the action just described,
the tapered end of the lock screw will force or jack them against such wall when it is tight- 7 ened.
The inclined edges of the slots permit an easy starting movement of the abrasive disk, as the action of the springs does not take effect until the split washers 23 contact the inclined'p'ortion 24 which does not occur until the disk has acquired some momentum.
It will be noted that the edges of' the slots are cut to form inclined portions on both faces'of the backing plate and the center holes 26 of the backing are countersunk at both ends. This provides for reversible mounting of the abrasive disks on the backing plate so that the plate may always be driven in the same direction relative to the slots, i. e. the enlarged end of the slot will always lead regardless of the direction of movement of the driving shaft. This serves as an additional anchoring means because movement of the abrasive disk due to frictional resistance while grinding will force the studs [5 against the end wall 34 of the slots and none of this force is exerted against the lock screw.
From the above, it is apparent that the abrasive disk maybe easily and quickly placed on the backing plate and forced into the desired working position thereon whereby a plurality of studs are locked into position with one movenient and secured in such position with the locking action. The disk may be just as quickly replaced without removing the backing from'the machine. Thus, many men and machine hours are saved in mounting the disks on the backing plate and but one backing plate is necessar for each size of disk.
.While I have shown and described certain embodiments of my invention, it is to be understood that it Changes therefore in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in theappended claims in which it is my intention to claim all novelty inherent in my invention as broadly as possible in view of the prior art.
What I claim and desire to secure by Letters Patent is: V
1. An abrasive disk unit comprising: backing plate means providedv with a plurality of slots;
an'abrasive disk assembly having studs with enlarged heads extending from the rear'face thereof, said slots having enlarged ends for receiving is capable. of many modifications,
4, Y of a size to snugly receive said stud; and resilient means on said studs to clamp them to the backing plate. V j r 2. A device a claimed in claim -1 in Which the slots extend from one face to the other of the backing member and'the edges of the slots are tapered toward the enlarged portions on both faces of the backing member.
3. A device as claimed in claim l'in which the clamping means is a washer and spring around the studs and adjacent the'heads thereof.
4. An abrasive disk unit comprising; a backing plate means provided with'a plurality of slots each'havin'g an enlarged end portion, the edge of said slots tapering toward said enlarged end; an
abrasive disk assembly having studs with enlarged heads each having a shoulder spaced from said head and lying above the end of said tapered edges of the slots when the studs are inserted into the slots; a washer on each of said shoulders; and a spring around each stud between the head and washer to force the washer against the shoulder.
5. An abrasive disk unit'comprising': a backing plate provided with a plurality of slots; an abrasive disk having studs with enlarged heads extending from the rear face thereof, said slots having enlarged ends for receiving said studs, the opposite ends of said slots being of a size to snugly receive said studs; means on said studs to clamp them to the backing plate; and means for one'of said studs and force itagainst the smaller end of its slot.
7. An abrasive disk unit comprising: i an abrasive disk assembly having studs with en-' larged heads extending from one face thereof;
and backing plate means provided with a plu rality of concentrically arranged arcuate slots, said slots having enlarged portions at one end for receiving the heads of said studs, the oppo site ends of said slots beingof a size to snugly receive said studs, the enlarged ends of said slots being on the leading end of the slot with respect Number Name f Date 2,351,129 JOCkBl i June 13, 194:4:
1,733,723 Doermann Oct. 29, 1929 1 ,812,076 Beebe June 30, 1931 2,279,278 Shue Apr. 7, 1942' 1,964,537 7 Shue June 26, 1934 2,378,271 Whl1dOn June 12, 1945 1,670,302 'Finnell May 22, 1923 said studs, the opposite'ends of said slots being v to the direction of rotation of the unit. ALBERT J. DOERMANN.
' REFERENCES CITED 7 The following references are' of record in the file of this patent: V
UNITED STATES PATENTS 1,835,573 Ponselle Dec. 1931
US586859A 1945-04-06 1945-04-06 Abrasive disk unit Expired - Lifetime US2425368A (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616230A (en) * 1950-07-11 1952-11-04 Allison Company Abrasive cutoff wheel
US2624987A (en) * 1950-07-19 1953-01-13 Gardner Machine Co Abrasive disk
US2836017A (en) * 1955-08-26 1958-05-27 Robert L Tygh Insert for grinding wheels
US3067549A (en) * 1959-08-08 1962-12-11 Glaceries Sambre Sa Glass polishing tools
US3191876A (en) * 1962-11-01 1965-06-29 Rachel Bidwell Apparatus for treating paper stocks
EP0050233A2 (en) * 1980-10-22 1982-04-28 J. König GmbH & Co. Werkzeugfabrik, Steinindustrie und Handwerkerbedarf Diamond grinding wheel for processing stone
US4854086A (en) * 1981-09-21 1989-08-08 Litton Industrial Automation Systems, Inc. Abrasive disc
US5586930A (en) * 1995-03-15 1996-12-24 Sanwa Kenma Kogyo Co., Ltd. Grinding chip fitting type grinding plate
WO2001076823A1 (en) 2000-04-07 2001-10-18 Robert Bosch Gmbh Receptacle for grinder tools
WO2001076822A1 (en) 2000-04-07 2001-10-18 Robert Bosch Gmbh Grinding machine tool support
US20090186567A1 (en) * 2008-01-17 2009-07-23 Xavier Orlhac Abrasive Tool With Mosaic Grinding Face
US20110223845A1 (en) * 2008-09-05 2011-09-15 Huskvarna Ab Double row abrasive disc
US9925645B2 (en) * 2015-02-02 2018-03-27 Ehwa Diamond Industrial Co., Ltd. Grinding tool
US20180200857A1 (en) * 2017-01-13 2018-07-19 Diamond Tool Supply, Inc. Grinding pad apparatus
US10046438B2 (en) 2015-09-24 2018-08-14 Diamond Tool Supply, Inc. Polishing or grinding pad assembly
USD837015S1 (en) 2014-06-06 2019-01-01 Husqvarna Construction Products North America, Inc. Polishing pad
US20190210192A1 (en) * 2018-01-11 2019-07-11 Diamond Tool Supply, Inc. Polishing or grinding pad with multilayer reinforcement
USD854902S1 (en) 2016-09-23 2019-07-30 Husqvarna Construction Products North America, Inc. Polishing or grinding pad
USD919396S1 (en) 2017-08-30 2021-05-18 Husqvarna Ab Polishing or grinding pad assembly with abrasive disks, reinforcement and pad
USD927952S1 (en) 2017-08-30 2021-08-17 Husqvarna Ab Polishing or grinding pad assembly with abrasive disk, spacer, reinforcement and pad
USD958626S1 (en) 2017-08-30 2022-07-26 Husqvarna Ab Polishing or grinding pad assembly with abrasive disks, reinforcement and pad
DE102022203295A1 (en) 2022-04-01 2023-10-05 Janser Gmbh Tool connecting device for a processing machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1670302A (en) * 1926-06-14 1928-05-22 Finnell System Inc Floor-treating machine
US1733723A (en) * 1928-03-24 1929-10-29 Albert J Doermann Abrasive disk
US1812076A (en) * 1930-09-22 1931-06-30 Peninsular Grinding Wheel Comp Grinding wheel
US1835573A (en) * 1927-06-28 1931-12-08 Robert A Ponselle Sanding machine
US1964537A (en) * 1931-05-25 1934-06-26 Gardner Machine Co Grinding disk
US2279278A (en) * 1939-03-17 1942-04-07 Gardner Machine Co Grinding disk
US2351129A (en) * 1943-01-09 1944-06-13 Titan Abrasive Company Anchor stud for abrasive wheels
US2378271A (en) * 1943-07-01 1945-06-12 Norton Co Reinforced abrasive article mounted on a backing plate

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1670302A (en) * 1926-06-14 1928-05-22 Finnell System Inc Floor-treating machine
US1835573A (en) * 1927-06-28 1931-12-08 Robert A Ponselle Sanding machine
US1733723A (en) * 1928-03-24 1929-10-29 Albert J Doermann Abrasive disk
US1812076A (en) * 1930-09-22 1931-06-30 Peninsular Grinding Wheel Comp Grinding wheel
US1964537A (en) * 1931-05-25 1934-06-26 Gardner Machine Co Grinding disk
US2279278A (en) * 1939-03-17 1942-04-07 Gardner Machine Co Grinding disk
US2351129A (en) * 1943-01-09 1944-06-13 Titan Abrasive Company Anchor stud for abrasive wheels
US2378271A (en) * 1943-07-01 1945-06-12 Norton Co Reinforced abrasive article mounted on a backing plate

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616230A (en) * 1950-07-11 1952-11-04 Allison Company Abrasive cutoff wheel
US2624987A (en) * 1950-07-19 1953-01-13 Gardner Machine Co Abrasive disk
US2836017A (en) * 1955-08-26 1958-05-27 Robert L Tygh Insert for grinding wheels
US3067549A (en) * 1959-08-08 1962-12-11 Glaceries Sambre Sa Glass polishing tools
US3191876A (en) * 1962-11-01 1965-06-29 Rachel Bidwell Apparatus for treating paper stocks
EP0050233A2 (en) * 1980-10-22 1982-04-28 J. König GmbH & Co. Werkzeugfabrik, Steinindustrie und Handwerkerbedarf Diamond grinding wheel for processing stone
EP0050233A3 (en) * 1980-10-22 1983-02-23 J. Konig Gmbh & Co. Werkzeugfabrik, Steinindustrie Und Handwerkerbedarf Diamond grinding wheel for processing stone
US4854086A (en) * 1981-09-21 1989-08-08 Litton Industrial Automation Systems, Inc. Abrasive disc
US5586930A (en) * 1995-03-15 1996-12-24 Sanwa Kenma Kogyo Co., Ltd. Grinding chip fitting type grinding plate
WO2001076823A1 (en) 2000-04-07 2001-10-18 Robert Bosch Gmbh Receptacle for grinder tools
WO2001076822A1 (en) 2000-04-07 2001-10-18 Robert Bosch Gmbh Grinding machine tool support
US6786811B2 (en) 2000-04-07 2004-09-07 Robert Bosch Gmbh Grinding machine tool support
US6869346B2 (en) 2000-04-07 2005-03-22 Robert Bosch Gmbh Receptacle for grinder tools
US20090186567A1 (en) * 2008-01-17 2009-07-23 Xavier Orlhac Abrasive Tool With Mosaic Grinding Face
US20110223845A1 (en) * 2008-09-05 2011-09-15 Huskvarna Ab Double row abrasive disc
US11161215B2 (en) * 2008-09-05 2021-11-02 Husqvarna Ab Double row abrasive disc
USD873108S1 (en) 2014-06-06 2020-01-21 Husqvarna Ab Polishing pad
USD837015S1 (en) 2014-06-06 2019-01-01 Husqvarna Construction Products North America, Inc. Polishing pad
US9925645B2 (en) * 2015-02-02 2018-03-27 Ehwa Diamond Industrial Co., Ltd. Grinding tool
US11084140B2 (en) 2015-09-24 2021-08-10 Husqvarna Ab Method of using polishing or grinding pad assembly
US20210205942A1 (en) * 2015-09-24 2021-07-08 Husqvarna Ab Method of using polishing or grinding pad assembly
US10092159B2 (en) 2015-09-24 2018-10-09 Diamond Tool Supply, Inc. Polishing or grinding pad assembly
US10244914B2 (en) * 2015-09-24 2019-04-02 Husqvarna Construction Products North America, Inc. Polishing or grinding pad assembly
US10667665B2 (en) * 2015-09-24 2020-06-02 Husqvarna Ab Method of using polishing or grinding pad assembly
US10046438B2 (en) 2015-09-24 2018-08-14 Diamond Tool Supply, Inc. Polishing or grinding pad assembly
USD854902S1 (en) 2016-09-23 2019-07-30 Husqvarna Construction Products North America, Inc. Polishing or grinding pad
USD933440S1 (en) 2016-09-23 2021-10-19 Husqvarna Ab Polishing or grinding pad
US10414012B2 (en) * 2017-01-13 2019-09-17 Husqvarna Construction Products North America, Inc. Grinding pad apparatus
US20180200857A1 (en) * 2017-01-13 2018-07-19 Diamond Tool Supply, Inc. Grinding pad apparatus
USD919396S1 (en) 2017-08-30 2021-05-18 Husqvarna Ab Polishing or grinding pad assembly with abrasive disks, reinforcement and pad
USD927952S1 (en) 2017-08-30 2021-08-17 Husqvarna Ab Polishing or grinding pad assembly with abrasive disk, spacer, reinforcement and pad
USD958626S1 (en) 2017-08-30 2022-07-26 Husqvarna Ab Polishing or grinding pad assembly with abrasive disks, reinforcement and pad
US10710214B2 (en) * 2018-01-11 2020-07-14 Husqvarna Ab Polishing or grinding pad with multilayer reinforcement
US20190210192A1 (en) * 2018-01-11 2019-07-11 Diamond Tool Supply, Inc. Polishing or grinding pad with multilayer reinforcement
DE102022203295A1 (en) 2022-04-01 2023-10-05 Janser Gmbh Tool connecting device for a processing machine

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