EP3389926B1 - Massereduzierter schleif-grundkörper - Google Patents

Massereduzierter schleif-grundkörper Download PDF

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Publication number
EP3389926B1
EP3389926B1 EP16810357.0A EP16810357A EP3389926B1 EP 3389926 B1 EP3389926 B1 EP 3389926B1 EP 16810357 A EP16810357 A EP 16810357A EP 3389926 B1 EP3389926 B1 EP 3389926B1
Authority
EP
European Patent Office
Prior art keywords
base body
grinding base
connecting structure
inner member
outer member
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.)
Not-in-force
Application number
EP16810357.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3389926A1 (de
Inventor
Frank Cichy
Maximilian BÜTTNER
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.)
ThyssenKrupp AG
Original Assignee
ThyssenKrupp 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 ThyssenKrupp AG filed Critical ThyssenKrupp AG
Publication of EP3389926A1 publication Critical patent/EP3389926A1/de
Application granted granted Critical
Publication of EP3389926B1 publication Critical patent/EP3389926B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B24D5/16—Bushings; Mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the present invention relates, in various aspects, to a abrasive backing, a use of a abrasive backing, and a method of making a abrasive backing.
  • Different grinding base bodies are known from the prior art. Abrasive bases can be used to machine different objects. For this purpose, an abrasive is applied to the abrasive base. After wear of the abrasive this can be exchanged and the grinding base again be used.
  • the prior art abrasive bodies have a comparatively high weight. On the one hand, this results in a high price of the abrasive base body. On the other hand, the handling of the abrasive base body is more expensive due to the high weight.
  • JP11028668 A a grinding wheel, which has a core of several layered plate-shaped layers of a fiber-plastic composite. A grinding wheel section is glued to the core. The core also has flange portions on its side surfaces, via which the core can be attached to a shaft. As a result, this should be achieved a low weight, so that a high speed can be achieved during grinding.
  • WO 2007/033396 A1 discloses a sanding base body with a carrier body for a rotating grinding or cutting tool, wherein the carrier body consists of a fiber-plastic composite with a peripheral wall, side walls and a hub.
  • the document forms the preamble of claim 1.
  • the invention therefore has the object of specifying a sanding base body, a use of a sanding base body and a method for producing a sanding base body, wherein a cost-effective production can be achieved with low weight.
  • the object is achieved by the provision of a sanding base according to claim 1.
  • a mass-reduced abrasive base body can be provided by the inventive structure of the abrasive body of outer body, inner body and connecting structure in combination with the use of fiber-plastic composite materials.
  • the structure according to the invention in combination with the choice of material according to the invention makes it possible to achieve an extremely force-flow-oriented, stiffness-optimized and strength-optimized structure which can serve as a carrier for the abrasive.
  • the rotational mass and thus also the centrifugal forces occurring in the processing process of grinding can be reduced.
  • higher accelerations of the abrasive body and improved balance options can be achieved.
  • the substantially cylindrical outer body may advantageously be added to the abrasive.
  • the abrasive may, for example, on the outside of the outer body (releasably) attached, in particular glued to this. Due to the substantially cylindrical outer body can thus a sufficient contact surface for the abrasive and thus a sufficiently large grinding surface can be provided.
  • connection can be achieved, in particular via its inner side, to a drive.
  • the connection can be direct or indirect.
  • the inner body of the connection to a drive shaft.
  • connection structure is used for the mechanical transmission of force, in particular the torque transmission from the inner body to the outer body.
  • the connection structure can be designed differently, provided that it allows a mechanical power transmission.
  • the connection structure preferably extends from the inside of the outer body to the outer side of the inner body.
  • the connecting structure is substantially perpendicular to the inside of the outer body and substantially perpendicular to the outside of the inner body.
  • both the outer body and the inner body and the connecting structure consist of a fiber-plastic composite.
  • the outer body, the inner body and the connecting structure of the same fiber-plastic composite.
  • different fiber-plastic composite materials such as another fiber or another plastic matrix
  • the inner body is a substantially cylindrical inner body.
  • a substantially cylindrical inner body can over the inside of the Inner body is provided an advantageous surface for connection to a drive.
  • the substantially cylindrical inner body and the substantially cylindrical outer body are preferably arranged concentrically to one another.
  • the inside of the inner body is preferably formed tapered along its cylinder axis. In this way, a secure connection can be made for example with a drive shaft.
  • the fibers of the fiber-plastic composite of the outer body, the inner body and / or the connecting structure as a scrim, fabric, braid, fabric and / or winding structure are formed.
  • the fibers of the fiber-plastic composite of both the outer body, as well as the inner body and the connecting structure are formed as described. Due to the described embodiments of the fiber-plastic composite and the fiber orientation resulting therefrom, the occurring rotational forces, the acting moments and the stiffness requirements of the abrasive base body can advantageously be taken into account. As a result, further mass reduction of the abrasive base body can be achieved with high rigidity.
  • the fibers of the fiber-plastic composite of the outer body and / or the inner body are at least partially oriented in the circumferential direction of the respective body. This can advantageously increase the bending and torsional strength of the abrasive body.
  • a fiber-plastic composite with braided or wound fibers is advantageous.
  • the fibers of the fiber-plastic composite of the outer body, the Inner body and / or the connection structure at least partially oriented along the surface of the respective body.
  • the inner body and / or the connecting structure is constructed in one or more layers.
  • a claimed layer structure of the abrasive base body can be achieved, since thereby the rotational forces, the acting moments and the stiffness requirements can be taken into account and as a result a loop body can be provided with low mass ,
  • the connecting structure is formed as a flat, in particular disk-shaped connecting element.
  • a flat, disk-shaped connecting element may be formed, for example, as a flat disc arranged between the outer body and the inner body, which preferably extends substantially perpendicular to the cylinder axis of the outer body and of the inner body.
  • the abrasive base body can advantageously have a cover, in particular in this embodiment.
  • the cover is preferably provided at one end of the abrasive base body, so that in any case the space between the outer body and the inner body is covered on one side. Thereby, an excessive accumulation of grinding dust between the outer body and inner body and connecting structure can be prevented.
  • connection structure has a quasi-isotropic layer structure.
  • uniform properties of the connection structure in particular with regard to stability and elasticity can be achieved.
  • this behaves like a metallic material.
  • a mass reduction with reliable mechanical properties can be achieved.
  • the quasi-isotropic layer structure can basically be constructed by a different number of (for example unidirectional) layers. However, the quasi-isotropic layer structure preferably comprises at least three layers.
  • the connecting structure comprises a plurality of spoke-like arranged elements.
  • the connecting structure consists of the spoke-like angoerdneten elements.
  • the spoke-like arranged elements may be formed, for example, as struts.
  • the spoke-shaped elements extend in the radial direction between the inner body and the outer body.
  • the spoke-like arranged elements each have a core of foam material. In this way, an additional weight reduction in the region of the connection structure can be achieved.
  • the outer body, the inner body and / or the connecting structure are constructed from preforms.
  • preforms For example, carbon fiber preforms are used.
  • Preforms are understood in particular to be preforms made of fibers, which are used to form the corresponding regions of the abrasive base body.
  • different separate preforms are used for the outer body, the inner body and the connection structure.
  • connection structure is bonded to the outer body and / or inner body in a material-locking and / or form-fitting manner.
  • connection structure is bonded to the inner body as well as to the outer body in a material-locking and / or form-fitting manner.
  • connection structure, the outer body and the inner body are made of separate preforms and connected to each other by infiltration with plastic.
  • the fibers of the fiber-plastic composite of the outer body, the inner body and / or the connecting structure comprise inorganic and / or organic reinforcing fibers, in particular at least one of carbon fibers, glass fibers, basalt fibers and aramid fibers.
  • inorganic fibers such as glass fibers or basalt fibers
  • organic fibers such as aramid fibers or carbon fibers
  • a high degree of orientation of the fibers can be achieved.
  • the matrix material of the fiber-plastic composite of the outer body, the inner body and / or the connecting structure comprises a thermoset or a thermoplastic.
  • thermosets are the relatively high thermomechanical Strength and low specific gravity advantageous, while thermoplastics, for example, a weldability is given.
  • the abrasive base body comprises a metal bush arranged at least in sections within the inner body.
  • the metallic bush is essentially cylindrical.
  • the metallic bushing is designed to taper in the axial direction.
  • the metallic socket can be connected to the inner body by means of a clamping seat, which can be achieved, for example, by shrinking the inner body onto the metallic bushing.
  • the outer body has a greater axial extent than the inner body.
  • an axial extent is understood in particular to be the extent in the direction of the respective cylinder axis.
  • the abrasive base body further comprises a on the outer body applied abrasive.
  • the abrasive is formed for example as abrasive coating or as abrasive elements.
  • the abrasive is applied annularly on the outside of the outer body, in particular glued by means of an adhesive layer.
  • the object mentioned at the outset is achieved by using a grinding base body according to the first aspect for the abrasive machining of metallic parts, in particular camshafts.
  • abrasive machining especially the grinding of metallic parts, such as camshafts, large diameters and high speeds of the abrasive bodies are needed. Due to their properties, in particular their low mass, the abrasive base bodies according to the first aspect are particularly suitable for this purpose.
  • the object mentioned at the outset is achieved by a method according to claim 17 for producing a sanding base body, in particular according to the first aspect.
  • an advantageous construction and, as a result, a reduced-mass abrasive base body can be provided by the inventive structure in combination with the choice of material according to the invention an extremely force flow compatible, stiffness-optimized and strength-optimized abrasive base body can be achieved.
  • the Inner body formed as a substantially cylindrical inner body.
  • the outer body, the inner body and the connecting structure can be formed one after the other or at the same time.
  • the outer body, the inner body and / or the connecting structure are formed by first placing fibers on a molding tool and then infiltrating the fibers with plastic.
  • a mold By using a mold, the structure and the geometry of the abrasive base body can be precisely determined, since the fibers can first be brought as preforms in the desired position and orientation. Subsequently, the fibers can be fixed by plastic infiltration and consolidation. The plastic infiltration can be overpressure assisted or vacuum assisted. In this way, in particular individual preforms can be connected to one another in a material-locking manner.
  • the fibers are already pre-infiltrated applied to the molds, for example as a prepreg.
  • the fibers are pre-impregnated, for example, with a reaction resin.
  • the fibers can then be cured in particular under the action of pressure and temperature.
  • the abrasive base body is removed from the mold after removal of the mold after infiltration. By infiltration in particular a cohesive connection between the outer body, the connecting structure and the inner body was achieved. After infiltration, therefore, the mold, which gives the fiber-plastic composite and thus the abrasive base body its shape, are removed.
  • the molding tool comprises separate molding tool sections for the outer body, the inner body and / or the connecting structure.
  • the molding tool sections are in particular separate parts which can be mounted on one another or connected to one another.
  • a mold section for the inner body, a mold section for the connection structure, and a mold section for the outer body are provided.
  • the fibers for example, as preforms first applied to the corresponding mold sections, for example, be wrapped around them. Subsequently, the mold sections can be mounted. Finally, the fibers can be infiltrated.
  • a metallic bush is arranged and fixed at least in sections within the inner body.
  • a hybrid construction can be achieved, which allows a high stability of the abrasive body in the field of connection to the drive.
  • the inner body can be shrunk onto the metallic bushing by exploiting the geometric design or the different thermal expansion behavior of the metallic bushing and the inner body.
  • a press fit of the metallic bushing can be achieved.
  • Fig. 1 first shows a first embodiment of a grinding base body 1 according to the first aspect in partial supervision ( Fig. 1a ) and in partial longitudinal section ( Fig. 1b ).
  • the abrasive base body 1 comprises a substantially cylindrical outer body 2 for receiving an abrasive (not shown).
  • the abrasive can be applied, for example, flat on the outside of the outer body 2.
  • the sanding base body 1 comprises a substantially cylindrical inner body 4 for connecting the sanding base body 1 to a drive (not
  • the outer body 2, the inner body 4 and the connecting structure 6 are all formed of a fiber-plastic composite, the fibers each having organic reinforcing fibers, in this case Carbon fibers are. Alternatively or additionally, however, it is also possible to use other fibers, such as glass fibers, basalt fibers or aramid fibers.
  • the plastic or matrix material of the fiber-plastic composite may be a thermoset or a thermoplastic.
  • the connecting structure 6 is formed here from a plurality of radially outwardly extending spoke-like arranged struts, of which only two struts 6a, 6b are shown here. This has the advantage that due to the recesses a deposition of grinding dust on the connecting structure 6 can be reduced.
  • the struts 6a, 6b, etc. may have a core of foam material to allow a particularly easy variant of the abrasive base body 1.
  • connection structure 6 is in particular connected to the outer body 2 as well as to the inner body 4 in a materially bonded manner. This can be achieved in particular by means of a plastic infiltration.
  • the outer body 2 and the inner body 4 are arranged concentrically and have the common cylinder axis 8.
  • the outer body 2 and the inner body 4 extend from the connecting structure 6 in each case in both directions substantially parallel to the axis 8. It can be seen that the Outer body 2 in comparison to the inner body 4 on one side has a greater axial extent or that the inner body 4 on one side has a correspondingly smaller axial extent.
  • a further reduction in mass is achieved, in particular, which makes it possible to reduce the rotational mass and the centrifugal forces during machining and thus to increase the acceleration.
  • the fibers of the fiber-plastic composite of the outer body 2, the inner body 4 and the connecting structure 6 are preferably formed as a scrim, fabric, braid, fabric and / or winding structure.
  • the fiber-plastic composite of the outer body 2, the inner body 4 and the connecting structure 6 is preferably constructed in multiple layers.
  • the fibers of the outer body 2, the inner body 4 and the connecting structure 4 are constructed from preforms.
  • a metallic bush 10 is also arranged as a hub element, with which a shaft-hub connection can be made.
  • the inner body 4 has been shrunk onto the metallic bushing 10, so that the metallic bushing 10 is fixed in the inner body 4 by means of a clamping fit.
  • the inner body 4 and / or the metallic bushing 10 along the cylinder axis 8 is tapered.
  • Fig. 2 now shows a second embodiment of a grinding base body 1 'according to the first aspect in plan view (2a) and in the longitudinal section (2b).
  • the second embodiment is similar to that in FIG Fig. 1 illustrated embodiment.
  • the comments on Fig. 1 referenced and the same reference numerals (in the case of spelled notation) are used. In the following, the differences will be discussed.
  • the connecting structure 6 'of the grinding base body 1' is designed differently.
  • the connecting structure 6 ' is formed in this case as a flat, disk-shaped connecting element 6'.
  • the disk-shaped connecting structure 6 ' has a quasi-isotropic layer structure, as a result of which the connecting structure 6' behaves in the plane similar to a metallic material.
  • the abrasive base body 1 ' also has a cover 12'.
  • the cover 12 ' is provided at one end of the abrasive base body 1', so that the space between the Outer body 2 'and the inner body 4' is covered. Thereby, an excessive accumulation of grinding dust between the outer body 2 ', the inner body 1' and the disc-shaped connecting structure 6 'can be prevented.
  • Fig. 3 shows a schematic representation of an advantageous fiber profile of a grinding base body.
  • the abrasive base can, for example, the abrasive base body 1 from Fig. 1 or the abrasive base 1 ' Fig. 2 be.
  • the fibers of the fiber-plastic composite of the outer body 2, 2 'and the inner body 4, 4' are at least partially oriented in the circumferential direction of the respective body.
  • the fibers of the fiber-plastic composite of the outer body 2, 2 ', the inner body 4, 4' and the connecting structure 6, 6 ' are at least partially oriented along the respective surface.
  • the Fig. 4a-d Now show a schematic representation of an embodiment of a manufacturing method according to the third aspect.
  • the in Fig. 2 shown grinding base body 1 'produced.
  • the illustrated manufacturing method is also transferable to the production of differently shaped abrasive base body, such as abrasive base body 1.
  • fibers 30 are applied as a disk-shaped preform to form the subsequent connecting structure 6, 6 'on a mold section 20 ( Fig. 4a ).
  • fibers 32 are applied as a preform to form the later inner body 4, 4 'on a cylindrical mold section 22 ( Fig. 4b ).
  • the mold sections 20 and 22 can then be joined together.
  • the tool sections 20, 22 are connected to a further cylindrical mold section 24. Consisting of the mold section
  • the assembled tools 20 and 24, the fibers 34 are applied to form the later outer body 2, 2 'with a braiding process ( Fig. 4c ).
  • an enclosing outer tool (not shown) is mounted, which images the shape-negative, substantially cylindrical contour of the outer body 2, 2 'to be produced.
  • the outer tool and the now inner tools 20, 22, 24 form the horrkavtician for the fibers 30, 32, 34.
  • the cylindrical contour may also contain changes in diameter, so as to be able to apply stepped or stepped abrasive coatings without the remote outer contour of the consolidated fiber composite body must be made by machining (milling / turning).
  • the fibers 30, 32, 34 are infiltrated with plastic, so that the outer body 2, 2 ', the inner body 4, 4' and the connecting structure 6, 6 'are formed from a fiber-plastic composite.
  • the abrasive base 1 ' can be removed from the mold by removing the individual mold sections 20, 22, 24 (FIG. Fig. 4d )

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP16810357.0A 2015-12-18 2016-12-13 Massereduzierter schleif-grundkörper Not-in-force EP3389926B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015122233.7A DE102015122233A1 (de) 2015-12-18 2015-12-18 Massereduzierter Schleif-Grundkörper
PCT/EP2016/080761 WO2017102707A1 (de) 2015-12-18 2016-12-13 Massereduzierter schleif-grundkörper

Publications (2)

Publication Number Publication Date
EP3389926A1 EP3389926A1 (de) 2018-10-24
EP3389926B1 true EP3389926B1 (de) 2019-10-02

Family

ID=57544437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16810357.0A Not-in-force EP3389926B1 (de) 2015-12-18 2016-12-13 Massereduzierter schleif-grundkörper

Country Status (6)

Country Link
US (1) US20180304442A1 (es)
EP (1) EP3389926B1 (es)
CN (1) CN108367414A (es)
DE (1) DE102015122233A1 (es)
ES (1) ES2764556T3 (es)
WO (1) WO2017102707A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016105049B4 (de) * 2016-03-18 2018-09-06 Thyssenkrupp Ag Verfahren zur Wiederbelegung eines Schleifwerkzeugs sowie wiederbelegbares Schleifwerkzeug hierzu
AT518908B1 (de) * 2016-08-11 2019-04-15 Tyrolit Schleifmittelwerke Swarovski Kg Trägerkörper für Schleifwerkzeuge
CN111823153A (zh) * 2020-08-06 2020-10-27 平湖盛邦科技有限公司 一种碳纤维基体复合结构砂轮及其制造方法
EP4098401A1 (de) * 2021-06-01 2022-12-07 Hilti Aktiengesellschaft Schleifteller für eine schleifscheibe einer schleifmaschine und herstellungsverfahren

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US2581934A (en) * 1949-04-04 1952-01-08 Firestone Tire & Rubber Co Abrading roll
US4184854A (en) * 1978-04-24 1980-01-22 Norton Company Magnetic cores for diamond or cubic boron nitride grinding wheels
US4456577A (en) * 1981-09-25 1984-06-26 Osaka Diamond Industrial Company, Ltd. Methods for producing composite rotary dresser
JPH1128668A (ja) 1997-07-04 1999-02-02 Toyoda Mach Works Ltd 高速研削用砥石車及びその取付方法
DE19812515A1 (de) * 1998-03-21 1999-09-23 M & F Entw & Patentverwertungs Lamellenschleifwerkzeug
IT1306145B1 (it) * 1999-05-21 2001-05-30 Quintilio Lupi Utensile rotativo ad azione combinata abrasiva e a frammentazione perla esecuzione di profili o di tagli su lastre di materiale fragile
KR20030091641A (ko) * 2002-05-27 2003-12-03 구레-노튼 가부시키가이샤 연마용 숫돌
AT502377B1 (de) * 2005-09-26 2007-03-15 Asen Norbert Ing Grundkörper für ein rotierendes schleif- bzw. schneidwerkzeug sowie daraus hergestelltes schleif- bzw. schneidwerkzeug
CN201483378U (zh) * 2009-09-01 2010-05-26 杜宝通 快速装卸式金刚石磨轮
DE102012005085A1 (de) * 2012-03-13 2013-09-19 Dr. Müller Diamantmetall AG Werkzeug zum Bearbeiten von Materialien
CN103343868B (zh) * 2013-06-27 2015-04-22 北京卫星制造厂 一种复合材料星敏支架制备方法

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Title
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Also Published As

Publication number Publication date
CN108367414A (zh) 2018-08-03
DE102015122233A1 (de) 2017-06-22
EP3389926A1 (de) 2018-10-24
US20180304442A1 (en) 2018-10-25
ES2764556T3 (es) 2020-06-03
WO2017102707A1 (de) 2017-06-22

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