US20160288295A1 - Rough Grinding Wheel Comprising A Core - Google Patents

Rough Grinding Wheel Comprising A Core Download PDF

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Publication number
US20160288295A1
US20160288295A1 US15/077,064 US201615077064A US2016288295A1 US 20160288295 A1 US20160288295 A1 US 20160288295A1 US 201615077064 A US201615077064 A US 201615077064A US 2016288295 A1 US2016288295 A1 US 2016288295A1
Authority
US
United States
Prior art keywords
grinding wheel
rough grinding
abrasive
wheel according
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/077,064
Other languages
English (en)
Inventor
Markus Moos
Bernd Conradi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klingspor AG
Original Assignee
Klingspor AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Klingspor AG filed Critical Klingspor AG
Assigned to KLINGSPOR AG reassignment KLINGSPOR AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CONRADI, BERND, MOOS, MARKUS
Publication of US20160288295A1 publication Critical patent/US20160288295A1/en
Priority to US16/388,088 priority Critical patent/US11235437B2/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • B24D7/02—Wheels in one piece
    • B24D7/04—Wheels in one piece with reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds
    • 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
    • B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
    • 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
    • B24D7/18—Wheels of special form

Definitions

  • the invention relates to a rough grinding wheel.
  • a rough grinding wheel of this kind is known from practice and is suitable for rough grinding of material surfaces of various materials. It comprises a wheel-shaped base body comprising a central recess for direct or indirect connection to a drive shaft of a tool. The central recess is penetrated by an axis of rotation. Furthermore, the base body comprises at least one abrasive layer.
  • the rough grinding wheel known to date does not exhibit satisfactory stability in particular at high speeds.
  • a stable rough grinding wheel is a rough grinding wheel that stays stiff even at high contact pressure.
  • a stable rough grinding wheel is easy to control, making it possible to achieve a defined or high stock removal rate.
  • the invention is based on the object of providing a rough grinding wheel of the kind mentioned above that is characterized by an improved structure and that in particular exhibits improved stability. This object is attained in an embodiment of the invention by the rough grinding wheel disclosed herein.
  • the rough grinding wheel according to the invention comprises a wheel-shaped base body comprising a central recess penetrated by an axis of rotation for direct or indirect connection to a drive shaft of a tool and comprising at least one abrasive layer.
  • the rough grinding wheel according to the invention is characterized by a stabilizing core for stabilizing the rough grinding wheel, said stabilizing core being associated with the at least one abrasive layer and being circumferentially adjacent to the central recess. Furthermore, the stabilizing core has higher strength than the at least one abrasive layer.
  • the stability can be further adapted and improved by using a core within the rough grinding wheel. This is because the core serves to stabilize the rough grinding wheel while the latter rotates.
  • the stabilizing core can optimize the rough grinding wheel in terms of its stability without affecting the abrasive areas, the abrasive mixtures or the strength of the rough grinding wheel. This is because the stabilizing core absorbs forces acting on the at least one abrasive layer during grinding and transmits them evenly to the drive shaft of the tool. In the same way, the stabilizing core evenly transmits the forces exerted by a user to the at least one abrasive layer via the drive shaft of the tool.
  • the stabilizing core additionally serves as a force transmission element between the at least one abrasive layer and the connection to a drive shaft of a tool.
  • the advantages of the rough grinding wheel according to the invention rest both in the concentration of mass in the area of its center of rotation and in the indirect transmission of forces between the at least one abrasive layer and the drive shaft of the tool. In this way, the rough grinding wheel stays stable and easily controllable at all times even in case of high applied forces and contact pressures and/or at high speeds.
  • a ratio of the outer radius of the stabilizing core to an outer radius of the rough grinding wheel is between 2:50 and 25:50. Preferably, the ratio is 17:50. This ratio leads to optimal stability and to a largest possible abrasive surface at the same time.
  • the base body has at least two abrasive layers, a separating layer being arranged between adjacent abrasive layers.
  • a separating layer being arranged between adjacent abrasive layers.
  • the abrasive layers may contain various fillers and additives.
  • the abrasive layers may comprise abrasive grits, such as regular brown fused alumina and derivatives, blue fired alumina, white fused alumina, zirconia alumina, silicon carbide, ceramic grain, pink fused alumina and/or monocrystalline alumina.
  • the abrasive layers may comprise supporting fillers, such as polyaluminum fluoride, cryolite, pyrite, calcite, wollastonite and/or graphite, which may be bonded by means of phenolic resin systems.
  • a core segment defining the stabilizing core can be associated with at least one of the abrasive layers.
  • at least one separating layer thus extends from the recess or from a hub to the outer edge of the rough grinding wheel.
  • the individual cores segments are connected to each other either directly via recesses in the corresponding separating layer or indirectly via the corresponding separating layer.
  • An abrasive layer and a cores segment associated with the corresponding abrasive layer are arranged between adjacent separating layers. The stability of the rough grinding wheel is ensured in that the individual cores segments together benefit the strength of the rough grinding wheel and define the stabilizing core.
  • FIG. 1 shows a section through a rough grinding wheel incorporating the present invention.
  • the rough grinding wheel 1 illustrated in the drawing comprises a base body 3 having a layered structure.
  • the base body 3 comprises a central recess 2 penetrated by an axis of rotation 5 located in the center of rotation of the rough grinding wheel 1 .
  • An insert 4 for attaching the rough grinding wheel 1 to a drive shaft of a tool is arranged in the recess 2 .
  • a reinforcing layer 6 is arranged on the tool side of the rough grinding wheel 1 facing toward the tool.
  • the reinforcing layer 6 may comprise rutile, wollastonite, calcite and/or basalt, which may be phenolic resin-bonded.
  • a grain size may be between 0.1 mm to 1.0 mm, preferably between 0.2 mm and 0.5 mm.
  • the reinforcing layer 6 may comprise quartz sand.
  • the reinforcing layer 6 has high strength. It may comprise a net-like interlining in order to further increase the stability of the rough grinding wheel 1 .
  • the rough grinding wheel 1 comprises two abrasive layers 8 a, 8 b arranged on the side facing away from the tool side of the reinforcing layer 6 .
  • the abrasive layers 8 a, 8 b may comprise abrasive grits, such as regular brown fused alumina and derivatives, blue fired alumina, white fused alumina, zirconia alumina, silicon carbide, ceramic grain, pink fused alumina and/or monocrystalline alumina.
  • the abrasive layers may comprise supporting fillers, such as polyaluminum fluoride, cryolite, pyrite, calcite, wollastonite and/or graphite, which may be bonded by means of phenolic resin systems.
  • a phenolic resin/abrasive grain mixture is formed, which may contain various fillers and additives.
  • a separating layer 10 is arranged between the two abrasive layers 8 a, 8 b. Furthermore, another separating layer 10 is arranged between the reinforcing layer 6 and abrasive layer 8 a.
  • Each of the separating layers 10 is formed by a glass tissue layer and benefits the strength of the rough grinding wheel 1 .
  • the separating layers 10 extend from an outer edge of the rough grinding wheel 1 to the central recess 2 and annularly surround the central recess 2 .
  • the rough grinding wheel 1 comprises a stabilizing core 12 surrounding the axis of rotation 5 of the rough grinding wheel 1 and being adjacent to the central recess 2 and, in sections, forming the edge of the central recess 2 .
  • the stabilizing core 12 may comprise rutile, wollastonite, calcite and/or basalt, which may be phenolic resin-bonded.
  • a grain size may be between 0.1 mm to 1.0 mm, preferably between 0.2 mm and 0.5 mm.
  • the reinforcing layer 6 may comprise quartz sand.
  • the stabilizing core 12 has higher strength than the abrasive layers 8 a, 8 b.
  • the stabilizing core 12 is formed by two core segments 12 a, 12 b and serves as a force transmission element between the two abrasive layers 8 a, 8 b and the connection to the drive shaft of the tool.
  • a core segment 12 a, 12 b of the stabilizing core 12 is associated with each abrasive layer 8 a, 8 b.
  • Core segment 12 a is arranged between two separating layers 10 adjacent thereto.
  • Core segment 12 b is adjacent to a separating layer 10 at the tool side and is open, i.e. not covered by a separating layer 10 , at the side facing the work piece.
  • the separating layers 10 divide the stabilizing core 12 into two core segments 12 a, 12 b.
  • the two adjacent core segments 12 a, 12 b are connected to each other via the interposed separating layer 10 and define the stabilizing core 12 .
  • the outer radius a of the stabilizing core 12 has a ratio of 17:50 to the outer radius b of the rough grinding wheel 1 . Furthermore, the stabilizing core 12 has a constant radius across its thickness and in the axial direction of the rough grinding wheel 1 .
  • the central recess 2 is realized as a recessed hub.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US15/077,064 2015-04-02 2016-03-22 Rough Grinding Wheel Comprising A Core Abandoned US20160288295A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/388,088 US11235437B2 (en) 2015-04-02 2019-04-18 Rough grinding wheel comprising a core

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015004355.2 2015-04-02
DE102015004355 2015-04-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/388,088 Continuation US11235437B2 (en) 2015-04-02 2019-04-18 Rough grinding wheel comprising a core

Publications (1)

Publication Number Publication Date
US20160288295A1 true US20160288295A1 (en) 2016-10-06

Family

ID=55532143

Family Applications (2)

Application Number Title Priority Date Filing Date
US15/077,064 Abandoned US20160288295A1 (en) 2015-04-02 2016-03-22 Rough Grinding Wheel Comprising A Core
US16/388,088 Active 2036-09-14 US11235437B2 (en) 2015-04-02 2019-04-18 Rough grinding wheel comprising a core

Family Applications After (1)

Application Number Title Priority Date Filing Date
US16/388,088 Active 2036-09-14 US11235437B2 (en) 2015-04-02 2019-04-18 Rough grinding wheel comprising a core

Country Status (11)

Country Link
US (2) US20160288295A1 (sl)
EP (1) EP3081337B1 (sl)
CA (1) CA2924939C (sl)
DK (1) DK3081337T3 (sl)
ES (1) ES2910650T3 (sl)
HR (1) HRP20220507T1 (sl)
HU (1) HUE058349T2 (sl)
PL (1) PL3081337T3 (sl)
PT (1) PT3081337T (sl)
RS (1) RS63129B1 (sl)
SI (1) SI3081337T1 (sl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11407086B2 (en) 2017-06-26 2022-08-09 Dronco Gmbh Method of manufacturing an abrasive member, in particular rotary abrasive disc, and abrasive member, in particular rotary abrasive disc

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018130237A1 (de) * 2017-01-16 2018-07-19 Klingspor Ag Schruppscheibe mit einem zumindest einen schleifaktiven zusatz umfassenden kern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130305614A1 (en) * 2012-03-30 2013-11-21 Anthony C. Gaeta Abrasive products having fibrillated fibers
US20150000206A1 (en) * 2013-06-28 2015-01-01 Saint-Gobain Abrasives, Inc. Abrasive article
US20150375367A1 (en) * 2014-06-29 2015-12-31 Saint-Gobain Abrasives, Inc. Abrasive article including a core and a bonded abrasive body

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545308A1 (de) * 1985-12-20 1987-06-25 Feldmuehle Ag Schleifscheibe mit daempfung
DE9420676U1 (de) * 1994-12-24 1995-02-23 Schleifmittel-Werk Karl Seiffert GmbH & Co., 40721 Hilden Recyclefähige Schleifkörperzonen
DE10359747A1 (de) * 2003-12-19 2005-07-14 August Rüggeberg Gmbh & Co. Kg Schrupp-Schleifscheibe
US8641481B2 (en) * 2008-12-30 2014-02-04 Saint-Gobain Abrasives, Inc. Reinforced bonded abrasive tools

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130305614A1 (en) * 2012-03-30 2013-11-21 Anthony C. Gaeta Abrasive products having fibrillated fibers
US20150000206A1 (en) * 2013-06-28 2015-01-01 Saint-Gobain Abrasives, Inc. Abrasive article
US20150375367A1 (en) * 2014-06-29 2015-12-31 Saint-Gobain Abrasives, Inc. Abrasive article including a core and a bonded abrasive body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11407086B2 (en) 2017-06-26 2022-08-09 Dronco Gmbh Method of manufacturing an abrasive member, in particular rotary abrasive disc, and abrasive member, in particular rotary abrasive disc

Also Published As

Publication number Publication date
CA2924939A1 (en) 2016-10-02
ES2910650T3 (es) 2022-05-13
SI3081337T1 (sl) 2022-06-30
HUE058349T2 (hu) 2022-07-28
EP3081337A1 (de) 2016-10-19
EP3081337B1 (de) 2022-02-16
PT3081337T (pt) 2022-04-11
HRP20220507T1 (hr) 2022-06-10
DK3081337T3 (da) 2022-04-25
RS63129B1 (sr) 2022-05-31
US11235437B2 (en) 2022-02-01
CA2924939C (en) 2017-12-05
PL3081337T3 (pl) 2022-06-06
US20190240809A1 (en) 2019-08-08

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Owner name: KLINGSPOR AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MOOS, MARKUS;CONRADI, BERND;SIGNING DATES FROM 20160321 TO 20160322;REEL/FRAME:038104/0717

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