WO2017010960A1 - Feeding apparatus for centerless grinding of bearing rings - Google Patents

Feeding apparatus for centerless grinding of bearing rings Download PDF

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Publication number
WO2017010960A1
WO2017010960A1 PCT/TR2016/050225 TR2016050225W WO2017010960A1 WO 2017010960 A1 WO2017010960 A1 WO 2017010960A1 TR 2016050225 W TR2016050225 W TR 2016050225W WO 2017010960 A1 WO2017010960 A1 WO 2017010960A1
Authority
WO
WIPO (PCT)
Prior art keywords
wedge
rings
spherical
centerless grinding
bearing rings
Prior art date
Application number
PCT/TR2016/050225
Other languages
French (fr)
Inventor
Feridun OZHAN
Fuat BULUT
Ayhan KAYA
Esad KARADUMAN
Niyazi SAYGILI
Original Assignee
Ortadogu Rulman Sanayi Ve Ticaret Anonim Sirketi
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 Ortadogu Rulman Sanayi Ve Ticaret Anonim Sirketi filed Critical Ortadogu Rulman Sanayi Ve Ticaret Anonim Sirketi
Priority to EP16757747.7A priority Critical patent/EP3322558B1/en
Publication of WO2017010960A1 publication Critical patent/WO2017010960A1/en

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Classifications

    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories
    • B24B5/355—Feeding means
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B24B5/225—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts for mass articles

Definitions

  • the invention is related to a feeding apparatus which prevents the backwards toppling over of the final batch rings that are fed into the centerless grinding machine during centerless grinding operation of bearing rings.
  • the invention is particularly related to the usage of a secondary feeding apparatus having a spherical face which is used to prevent the faulty grinding sizes of rings, if the operator has bent the rod grasping the log, thereby bending the rings which are fed into the machine together with the log according to their driving axis, and to prevent the final batch rings that are fed into the centerless grinding machine from toppling over backwards.
  • a spherical guide which is controlled mechanically in order to center the work piece is described in this invention.
  • a tangential feeding method of a centerless grinding machine has been described.
  • the work pieces are carried between two wedges via a channel in order to perform the conveying process.
  • different methods are being used in order to feed and center the work pieces during a centerless grinding procedure.
  • the "feeding apparatus for centerless grinding” that has been described in this document provides a method that is different from the ones in the known state of the art and from the above mentioned documents.
  • the feeding apparatus comprises a second wedge having a spherical face that is in contact with the cylindrical wedge used behind the cylindrical steel wedge.
  • the aim of this invention is to provide an apparatus for centerless grinding where the driving axis of bearing rings are maintained even if the operator is has shifted the push rod or has been holding the push rod at a different angle than the driving axis.
  • Another aim of this invention is to provide a feeding apparatus for centerless grinding where the second wedge having a spherical surface that is pushed by the rod, is in constant contact with cylindrical wedge from a single central point even if the operator has shifted the push rod or has been holding the push rod at a different angle than the driving axis.
  • a second wedge having a spherical surface is placed between the push rod and the cylindrical wedge in order to prevent the faulty production of rings.
  • the spherical surface of the second wedge is in contact with the cylindrical wedge that is used in the prior art.
  • the wedge having a spherical surface is pushed by the rod ( Figure 4).
  • the wedge is prevented from being inclined when an angle is formed between the moving direction of the rings that are driven by the rod pushed by the operator, as the second spherical wedge is in contact with the surface of the cylindrical wedge at a single point and as it shall be acting like a knuckle.
  • the bending of the rings is also prevented and it is also prevented for the rings to be fed between the grinding wheel and the spinning wheel at an inclined angle; therefore faulty grinding of the rings is eliminated.
  • Figure-1 is the side view of the centerless grinding machine.
  • Figure-2 is the partial plan view of the centerless grinding machine utilizing the cylindrical wedge only.
  • Figure-3 is the partial plan view where only the cylindrical wedge is used and where the operator is holding the rod at an inclined angle during the centerless grinding procedure
  • Figure-4 is the partial plan view where a spherical wedge is used together with the cylindrical wedge during the centerless grinding procedure
  • Figure-5 is the partial schematic plan view where the spherical wedge is used together with the cylindrical wedge during the centerless grinding procedure and where the operator is holding the rod at an inclined angle.
  • the feeding apparatus subject to the invention comprises;
  • a cylindrical wedge (5) which is installed behind the external bearing rings (2) in order to prevent the toppling over backwards of the final batch of the external bearing rings (2) during a grinding operation, having contact with the spherical wedge (8) at a single point in order to prevent of the axial shifting of bearing rings,
  • a spherical wedge (8) having a spherical surface, wherein said spherical surface is in contact with the cylindrical wedge (5), therefore being pushed by the rod (6) and having constant contact with the cylindrical wedge (5) at a single central point.
  • the external bearing rings (2) are processed in the centerless grinding machine (1) in order to ensure that the external diameters of the external bearing rings (2) are provided with the desired surface roughness and size.
  • a regulating wheel (4) is provided whose position is changed whose diameter is adjusted.
  • two drums (7) which rotate in the same direction are provided in order to ensure that the external bearing rings (2) are moved between the grinding wheel (3) and the regulating wheel (4).
  • a second spherical wedge (8) having a spherical surface is placed between the push rod (6) and the cylindrical wedge (8) in order to prevent the faulty production of external bearing rings (2) during a centerless grinding operation.
  • the surface of the spherical wedge (8) that is in contact with the cylindrical wedge (5) has a flat structure.
  • the spherical surface of the spherical wedge (8) is in contact with the cylindrical wedge (5) that is used in the prior art.
  • the spherical surface of the spherical wedge (8) applies force on the surface of the cylindrical wedge. This pressure force is formed by pushing of the spherical wedge (8) via a rod (6) by the operator.
  • the spherical wedge (8) still continues to contact the cylindrical wedge (5) at a single surface as it has a spherical processed surface.
  • the spherical surface of the spherical wedge (8) shall act as a knuckle between the spherical wedge (8) and the cylindrical wedge (5) the inclination of the cylindrical wedge (5) is prevented. Therefore the inclination of the external bearing rings (2) pushed by the cylindrical wedge (5) are also prevented and as a result the external bearing rings (2) are not driven at an inclined angle between the grinding wheel (3) and the regulating wheel (4) and faulty grinding thereof are prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The invention is related to a second centering apparatus having a spherical face to be installed behind the final batch rings, that are fed into the centerless grinding machine to prevent their faulty grinding sizes, if they are fed at an inclined angle together with the log if the operator has being holding the rod at an inclined angle, 10 which is used to push the final batch rings that are fed between the grinding wheel and the regulating wheel, in the centerless grinding machine during a centerless grinding operation of said bearing rings.

Description

FEEDING APPARATUS FOR CENTERLESS GRINDING OF BEARING
RINGS
Technical Field
The invention is related to a feeding apparatus which prevents the backwards toppling over of the final batch rings that are fed into the centerless grinding machine during centerless grinding operation of bearing rings.
The invention is particularly related to the usage of a secondary feeding apparatus having a spherical face which is used to prevent the faulty grinding sizes of rings, if the operator has bent the rod grasping the log, thereby bending the rings which are fed into the machine together with the log according to their driving axis, and to prevent the final batch rings that are fed into the centerless grinding machine from toppling over backwards.
Prior Art
Nowadays external bearing rings are fed between a grinding wheel and a regulating wheel by means of two drums that rotate in the same direction having an incline; such that the side surfaces of the external bearing rings that are successively aligned are in contact with each other. As there are no other rings to be fed following the final batch rings, there will be no support provided behind the rings. For this reason, the rings may topple over backwards and may break the wheels. In order to prevent this, in the present system the rings in the final batch are pushed by the operator by means of a rod and a cylindrical steel wedge, according to their driving axis and thereby are prevented from toppling over backwards.
(Figure 2) It is possible for the wedge that is in contact with the rod to be bent in a direction different from the driving axis, if the operator pushes the rod such that it is angled to an angle different to the driving axis. When the wedge is inclined the bearing rings are also inclined, therefore causing the bearing rings to be fed between the grinding wheel and a regulating wheel at an angle beyond the driving axis. (Figure 3) This undesirable situation causes the ring sizes to be deteriorated as one side of the external diameters of the rings shall be ground more.
There are some developments present in the known state of the art, that have been provide to prevent the shifting of the axis of work pieces in centerless grinding machines. For example in the CN 103894894 A Patent document which can be given as an example to these developments, a radial processing system provided in a centerless grinding machine has been described. This invention comprises a group box which fixes the successively aligned bearing rings therein; in order to ensure that the axial angle of the circular rings does not shift during the centerless grinding process. The group box ensures that the bearing rings are fixed successively and enables the rings to be fed into the grinding unit without shifting of the central angles of the rings. In the American Patent document numbered US4930260A within the known state of the art, a centerless grinding machine has been described. A spherical guide which is controlled mechanically in order to center the work piece is described in this invention. In the American Patent document numbered US4043767A within the known state of the art, a tangential feeding method of a centerless grinding machine has been described. According to this invention the work pieces are carried between two wedges via a channel in order to perform the conveying process. As it can be understood from the similar above mentioned documents different methods are being used in order to feed and center the work pieces during a centerless grinding procedure. The "feeding apparatus for centerless grinding" that has been described in this document provides a method that is different from the ones in the known state of the art and from the above mentioned documents. The feeding apparatus comprises a second wedge having a spherical face that is in contact with the cylindrical wedge used behind the cylindrical steel wedge.
Brief Description of the Invention and its Aims
The aim of this invention is to provide an apparatus for centerless grinding where the driving axis of bearing rings are maintained even if the operator is has shifted the push rod or has been holding the push rod at a different angle than the driving axis. Another aim of this invention, is to provide a feeding apparatus for centerless grinding where the second wedge having a spherical surface that is pushed by the rod, is in constant contact with cylindrical wedge from a single central point even if the operator has shifted the push rod or has been holding the push rod at a different angle than the driving axis.
The feeding apparatus provided in order to reach the aims of the invention comprises a cylindrical wedge installed behind the final batch rings, a second wedge having a spherical surface that is in contact with the cylindrical wedge at a single point and a rod that is contact with the second wedge.
A second wedge having a spherical surface is placed between the push rod and the cylindrical wedge in order to prevent the faulty production of rings. The spherical surface of the second wedge is in contact with the cylindrical wedge that is used in the prior art. However now, the wedge having a spherical surface is pushed by the rod (Figure 4). The wedge is prevented from being inclined when an angle is formed between the moving direction of the rings that are driven by the rod pushed by the operator, as the second spherical wedge is in contact with the surface of the cylindrical wedge at a single point and as it shall be acting like a knuckle. As a result the bending of the rings is also prevented and it is also prevented for the rings to be fed between the grinding wheel and the spinning wheel at an inclined angle; therefore faulty grinding of the rings is eliminated.
Detailed Description of the Invention
The feeding apparatus for centerless grinding that is provided in order to reach the aims of the invention has been illustrated in the attached figures. According to the figures;
Figure-1 is the side view of the centerless grinding machine.
Figure-2 is the partial plan view of the centerless grinding machine utilizing the cylindrical wedge only.
Figure-3 is the partial plan view where only the cylindrical wedge is used and where the operator is holding the rod at an inclined angle during the centerless grinding procedure
Figure-4 is the partial plan view where a spherical wedge is used together with the cylindrical wedge during the centerless grinding procedure
Figure-5 is the partial schematic plan view where the spherical wedge is used together with the cylindrical wedge during the centerless grinding procedure and where the operator is holding the rod at an inclined angle.
The parts in the figures have been numbered as follows; 1. Centerless grinding machine
2. External bearing ring
3. Grinding wheel
4. Regulating wheel
5. Cylindrical wedge
6. Rod
7. Drums
8. Spherical wedge The feeding apparatus subject to the invention comprises;
- A cylindrical wedge (5) which is installed behind the external bearing rings (2) in order to prevent the toppling over backwards of the final batch of the external bearing rings (2) during a grinding operation, having contact with the spherical wedge (8) at a single point in order to prevent of the axial shifting of bearing rings,
- A rod (6) which pushes the spherical wedge (8) during a grinding operation, in order to enable the spherical surface of the spherical wedge (8) to apply physical pressure on the surface center of the cylindrical wedge (5) and,
- A spherical wedge (8) having a spherical surface, wherein said spherical surface is in contact with the cylindrical wedge (5), therefore being pushed by the rod (6) and having constant contact with the cylindrical wedge (5) at a single central point.
The external bearing rings (2) are processed in the centerless grinding machine (1) in order to ensure that the external diameters of the external bearing rings (2) are provided with the desired surface roughness and size. When the diameter of the external bearing ring (2) that is to be ground and is in constant contact with the external bearing rings (2) during the grinding process and the cylindrical grinding wheel (3) used in grinding of the external bearing ring (2) by the centerless grinding machine (1), a regulating wheel (4) is provided whose position is changed whose diameter is adjusted. Moreover two drums (7) which rotate in the same direction are provided in order to ensure that the external bearing rings (2) are moved between the grinding wheel (3) and the regulating wheel (4).
A second spherical wedge (8) having a spherical surface is placed between the push rod (6) and the cylindrical wedge (8) in order to prevent the faulty production of external bearing rings (2) during a centerless grinding operation. The surface of the spherical wedge (8) that is in contact with the cylindrical wedge (5) has a flat structure. The spherical surface of the spherical wedge (8) is in contact with the cylindrical wedge (5) that is used in the prior art. The spherical surface of the spherical wedge (8) applies force on the surface of the cylindrical wedge. This pressure force is formed by pushing of the spherical wedge (8) via a rod (6) by the operator.
Even if the rod (6) pushed by the operator has a deviated angle outside of the driving axis of the external bearing rings (2) the spherical wedge (8) still continues to contact the cylindrical wedge (5) at a single surface as it has a spherical processed surface. By this means as the spherical surface of the spherical wedge (8) shall act as a knuckle between the spherical wedge (8) and the cylindrical wedge (5) the inclination of the cylindrical wedge (5) is prevented. Therefore the inclination of the external bearing rings (2) pushed by the cylindrical wedge (5) are also prevented and as a result the external bearing rings (2) are not driven at an inclined angle between the grinding wheel (3) and the regulating wheel (4) and faulty grinding thereof are prevented.
In conclusion even if the operator pushes the rod (6) and therefore the spherical wedge (8) at a wider angle different from the driving axis the driving axis of the external bearing rings (2) pushed by the cylindrical wedge (5) and the axis of the cylindrical wedge (5) itself shall not change. As a result the disadvantages of external bearing rings (2) and the centerless grinding machine (1) caused from operator mistakes are prevented.

Claims

1.) The invention is a feeding apparatus comprising;
- A cylindrical wedge (5) that is installed behind the external bearing rings
(2) in order to prevent the last batch of the external bearing rings (2) from toppling over backwards during a grinding process, and
- A rod (6) which pushes the spherical wedge (8) during a grinding operation, thereby allowing a physical pressure to be applied onto the central surface of the cylindrical wedge (5) of the spherical wedge (8); characterized in that it comprises;
- A spherical wedge (8) having a spherical surface that is in contact with the cylindrical wedge (5); therefore being pushed by the rod (6) to have contact with the cylindrical wedge (5) at a constant single central point.
PCT/TR2016/050225 2015-07-15 2016-07-14 Feeding apparatus for centerless grinding of bearing rings WO2017010960A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16757747.7A EP3322558B1 (en) 2015-07-15 2016-07-14 Feeding apparatus for centerless grinding of bearing rings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2015/08902A TR201508902A2 (en) 2015-07-15 2015-07-15 BEARING FEEDING FOR POINT-FREE GRINDING
TR2015/08902 2015-07-15

Publications (1)

Publication Number Publication Date
WO2017010960A1 true WO2017010960A1 (en) 2017-01-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2016/050225 WO2017010960A1 (en) 2015-07-15 2016-07-14 Feeding apparatus for centerless grinding of bearing rings

Country Status (3)

Country Link
EP (1) EP3322558B1 (en)
TR (1) TR201508902A2 (en)
WO (1) WO2017010960A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108747804A (en) * 2018-07-30 2018-11-06 湖南美蓓达科技股份有限公司 Positioning device for bearing outer ring channel ultraprecision grinding process
CN109262422A (en) * 2018-11-01 2019-01-25 重庆江增船舶重工有限公司 A kind of processing method that workpiece oil film wedge face is ground with CNC milling machine
CN110666603A (en) * 2019-10-14 2020-01-10 宁海县鑫鸿汽车部件有限公司 Hardware centerless grinding equipment
CN112171397A (en) * 2020-09-29 2021-01-05 广州大学 Anti-gravity anti-cutting and anti-deformation centerless grinding device and machining method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110064978B (en) * 2019-05-27 2023-10-13 南京工程学院 Automatic loading and unloading device applied to bearing inner ring of bearing grinding machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837821A (en) * 1925-10-21 1931-12-22 Cincinnati Grinders Inc Centerless grinding machine
US4043767A (en) 1975-09-20 1977-08-23 Minoru Suda Centerless grinding machine using tangential-feed method
US4930260A (en) 1987-11-18 1990-06-05 Akebono Brake Industry Co., Ltd. Centerless grinding apparatus of through-feed type
DE102007061404A1 (en) * 2007-12-12 2009-06-18 Nagel Maschinen- Und Werkzeugfabrik Gmbh Workholding device for device for super finishing rotationally symmetric work piece in centerless continuous process, has pair of bearer drums for receiving workpiece in receiving slot
CN103894894A (en) 2014-04-11 2014-07-02 上海师范大学 Circular machining system of centerless grinding machine for bearing machining

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1837821A (en) * 1925-10-21 1931-12-22 Cincinnati Grinders Inc Centerless grinding machine
US4043767A (en) 1975-09-20 1977-08-23 Minoru Suda Centerless grinding machine using tangential-feed method
US4930260A (en) 1987-11-18 1990-06-05 Akebono Brake Industry Co., Ltd. Centerless grinding apparatus of through-feed type
DE102007061404A1 (en) * 2007-12-12 2009-06-18 Nagel Maschinen- Und Werkzeugfabrik Gmbh Workholding device for device for super finishing rotationally symmetric work piece in centerless continuous process, has pair of bearer drums for receiving workpiece in receiving slot
CN103894894A (en) 2014-04-11 2014-07-02 上海师范大学 Circular machining system of centerless grinding machine for bearing machining

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108747804A (en) * 2018-07-30 2018-11-06 湖南美蓓达科技股份有限公司 Positioning device for bearing outer ring channel ultraprecision grinding process
CN109262422A (en) * 2018-11-01 2019-01-25 重庆江增船舶重工有限公司 A kind of processing method that workpiece oil film wedge face is ground with CNC milling machine
CN110666603A (en) * 2019-10-14 2020-01-10 宁海县鑫鸿汽车部件有限公司 Hardware centerless grinding equipment
CN110666603B (en) * 2019-10-14 2020-09-11 玉环精格机床附件有限公司 Hardware centerless grinding equipment
CN112171397A (en) * 2020-09-29 2021-01-05 广州大学 Anti-gravity anti-cutting and anti-deformation centerless grinding device and machining method
CN112171397B (en) * 2020-09-29 2022-02-01 广州大学 Anti-gravity anti-cutting and anti-deformation centerless grinding device and machining method

Also Published As

Publication number Publication date
EP3322558B1 (en) 2019-03-20
TR201508902A2 (en) 2015-10-21
EP3322558A1 (en) 2018-05-23

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