US3909986A - Apparatus for grinding cylindrical workpieces - Google Patents

Apparatus for grinding cylindrical workpieces Download PDF

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Publication number
US3909986A
US3909986A US456441A US45644174A US3909986A US 3909986 A US3909986 A US 3909986A US 456441 A US456441 A US 456441A US 45644174 A US45644174 A US 45644174A US 3909986 A US3909986 A US 3909986A
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United States
Prior art keywords
workpieces
grinding
belt
feed belt
platen
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Expired - Lifetime
Application number
US456441A
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English (en)
Inventor
Shinichi Miyazawa
Hidehiko Takeyama
Kaneyoshi Miyasaka
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National Institute of Advanced Industrial Science and Technology AIST
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Agency of Industrial Science and Technology
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Publication date
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Publication of US3909986A publication Critical patent/US3909986A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces

Definitions

  • ABSTRACT An apparatus for continuously grinding a multiplicity of cylindrical workpieces required to be concentrically ground with reference to their axes.
  • the apparatus comprises an upper elastic feed belt adapted to push downwardly and roll the cylindrical workpieces around their axes on a rolling table and a lower grinding belt adapted to be moved at a high rate of speed so as to grind the rolling surfaces of said cylindrical workpieces.
  • An object of this invention is to provide a cylindrical grinding apparatus which is capable of continuously and efficiently grinding cylindrical workpieces concentrically with reference to their respective axes without axially fastening the workpieces by means of a chuck or center.
  • the cylindrical grinding apparatus has a lower platen having an endless grinding belt running at a high rate of speed thereon and an upper platen having a resilient feed belt running thereunder disposed opposite the'lower platen.
  • a rolling table for imparting a rolling motion to the shafts of the cylindrical workpieces.
  • the workpieces are not axially fastened by means of a chuck or center, a large number of workpieces can continuously be ground. Since the shafts of the workpieces are made to roll on the rolling tables, the workpieces can be concentrically ground with reference to their respective axes to a prescribed size in the same way as when the workpieces axially fastened by means of a chuck are acted upon by a cutting tool.
  • FIG. 1 is a side elevational view illustrating one preferred embodiment of the cylindrical grinding apparatus according to this invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II of the apparatus of FIG. 1.
  • an endless grinding belt 1 is passed around a driving pulley 6, an idle pulley 7 and a tension pulley 8 which are rotated by a suitable driving means (not illustrated).
  • the rotation of the driving means causes this grinding belt I to travel at a high rate of speed on a platen 2 in the direction of the arrow mark.
  • An endless feed belt 3 adapted to convey workpieces is passed around a driving pulley 9 and an idle pulley 10.
  • a platen 4 is disposed opposite the platen 2 and adapted to keep the feed belt 3 in position.
  • the feed belt 3 is driven to rotate oppositely to grinding belt 1 so that part of the feed belt 3 and the part of the grinding belt I facing each other travel in the same direction.
  • a rolling table 5 is disposed on either side of the platen 2. These rolling tables 5 receive and support shafts 12 which protrude from either end of workpieces 1 I.
  • the feed belt 3 maintains itself in a depressed state so as to keep contact with the surface of workpieces 11.
  • the two opposed rolling tables are separated from each other by a distance equalling the width of the cylindrical workpieces to be handled.
  • projections 5' may be provided as illustrated in FIG. 2, so that the workpieces will be prevented from swerving with respect to the direction of thrust while being ground.
  • the feed belt 3 is made of a substance such as, for example, polyurethane rubber which abounds in resilience and friction.
  • the platen 2 comprises an anterior part 2a inclined on the receiving side of the apparatus with reference to the rolling tables so as to provide gradually increased grinding for unground workpieces having a large diameter and a posterior part 217 disposed parallel to the rolling tables so as to finish the workpieces 11 to the prescribed size.
  • the platen 4 comprises an anterior part 4a inclined on the receiving side of the apparatus so as to facilitate reception of unground workpieces having a large diameter and a posterior part 412 disposed parallel to the corresponding parallel part 21) of the platen 2. Simultaneous incorporation of the two inclined parts 2a and 4a, one in each platen, is not an essential requirement. Use of one inclined part in either of the two platens suffices for the purpose.
  • an endless chain 13 having regularly spaced bearing boxes 14 attached thereto travels in parallel relation to the grinding belt I.
  • the chain 13 is passed around a pair of opposed sprockets 15. The rotation of the sprockets keeps the chain 13 in motion.
  • the bearing boxes 14 are so constructed that their bottoms do not rise above the upper surface of the rolling tables 5.
  • the feed belt 3 imparts a rolling motion to the workpieces and the motion of the chain carries them to the inclined parts 2a and 4a of the platens 2 and 4.
  • the grinding belt 1 which travels at a high rate of speed in the direction opposite that of the rotation of the workpieces begins to gradually grind the surface of the workpieces. While the grinding work is in progress, the workpieces are prevented from skewing by the rolling tables 5 or the projections 5 thereon.
  • the speed of the grinding belt and that of the feed belt are adjusted in the range of from 1200 to 1800 m/min and in the range of from 0.5 to l m/min, respectively, although both speeds are variable with such factors as the shape and material of the workpieces, the amount of grinding, the length of the platens, the friction coefficient of the feed belt and the traveling speed of the workpieces (traveling speed of the chains). Since the speeds of the two belts differ greatly as described above, the directions in which the two belts are caused to travel along the opening need not necessarily be opposite.
  • the grinding effect produced by the present apparatus is substantially the same even when they are caused to travel in the same direction along the open-
  • the distance between the parallel parts of the two platens and the height of the rolling tables are selected with due consideration paid to the thickness of the grinding belt and that of the feed belt, so that the workpieces will be ground in the prescribed amount.
  • the workpieces are rolled on the rolling tables by the feed belt, with the rate of their conveyance controlled by means of the bearing boxes.
  • the workpieces, while in transit, are ground to a prescribed size throughout their entire circumferences, with the axial direction of the workpieces maintained perpendicular to the direction in which the belts travel.
  • the cylindrical grinding apparatus of this invention permits workpieces to be received, ground and discharged continuously without requiring them to be fastened to the table of a grinding machines.
  • the present apparatus permits a multiplicity of workpieces to be simultaneously ground, making it possible to improve the operating efficiency of the apparatus to a great extent.
  • the pressure with which the grinding belt is held in contact with the workpieces is made uniform so as to provide the required degree of grinding under a fixed pressure, this apparatus enables workpieces to be ground accurately to a fixed size despite possible dimensional variation involved in the previous stage of machining.
  • An apparatus for grinding cylindrical workpieces having axially extending shafts on the opposites ends thereof comprising in combination:
  • a grinding belt arranged to run at a high speed over said lower platen
  • a feed belt arranged to travel under said upper platen, said feed belt producing on said workpieces to be ground a frictional force greater than the force which said grinding belt exerts thereon;
  • the feed belt causes the shafts of a multiplicity of workpieces to be pressed against and rolled on said rolling tables while the workpieces are being ground to a fixed size by said grinding belt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US456441A 1973-06-18 1974-04-01 Apparatus for grinding cylindrical workpieces Expired - Lifetime US3909986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48068477A JPS5016996A (enrdf_load_stackoverflow) 1973-06-18 1973-06-18

Publications (1)

Publication Number Publication Date
US3909986A true US3909986A (en) 1975-10-07

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US456441A Expired - Lifetime US3909986A (en) 1973-06-18 1974-04-01 Apparatus for grinding cylindrical workpieces

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US (1) US3909986A (enrdf_load_stackoverflow)
JP (1) JPS5016996A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048761A (en) * 1976-07-09 1977-09-20 Champion International Corporation Paper stick pointing apparatus
US4085548A (en) * 1976-02-21 1978-04-25 Newalls Insulation Company Limited Apparatus for manufacture of insulation products
US4240231A (en) * 1978-09-05 1980-12-23 Lawrence Day Rectilinear work finishing apparatus
US4514937A (en) * 1981-02-05 1985-05-07 Basf Aktiengesellschaft Method for the surface treatment of magnetic recording media
US4676029A (en) * 1983-07-15 1987-06-30 Helical Springs Limited Of Lytham Ind. Est. Park Opposed endless belt grinding apparatus
US6220940B1 (en) * 1999-10-27 2001-04-24 Grinding Equipment & Machinery Co., Inc. Micro-finishing apparatus
WO2013110746A3 (de) * 2012-01-27 2013-09-19 Thielenhaus Technologies Gmbh Verfahren und vorrichtung zur microfinishbearbeitung von rotationssymmetrischen werkstücken im kontinuierlichen durchlaufverfahren
CN105081934A (zh) * 2015-08-21 2015-11-25 张继兰 一种铸造件打磨装置
US9718210B1 (en) * 2013-04-08 2017-08-01 Parrot Wizard Inc Method of fabricating a wooden perch
CN109079628A (zh) * 2018-07-12 2018-12-25 蚌埠市瑞泰汽配制造有限公司 一种滤清器壳体面的打磨装置
CN110814967A (zh) * 2019-10-30 2020-02-21 方国亮 一种用于铝合金管外表面抛光设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5675211A (en) * 1979-11-27 1981-06-22 Aisin Seiki Co Ltd Door lock with open-close detector switch of door for automobile
JPS58127874A (ja) * 1982-01-25 1983-07-30 国産金属工業株式会社 シリンダ錠の不正解錠警報装置
JPS58136553U (ja) * 1982-03-09 1983-09-13 夏川　泰男 鍵穴のいたずら防止装置
JPH0192059A (ja) * 1987-10-02 1989-04-11 Agency Of Ind Science & Technol 小径円筒外面の鏡面仕上げ装置
JPH01112267U (enrdf_load_stackoverflow) * 1988-01-22 1989-07-28

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574349A (en) * 1950-03-28 1951-11-06 Otten Henry Machine for grinding and smoothing rollers
US2579604A (en) * 1950-04-19 1951-12-25 Otto C Niederer Egg cleaning device
US2936555A (en) * 1958-11-12 1960-05-17 Pittsburgh Plate Glass Co Manufacture of plate glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574349A (en) * 1950-03-28 1951-11-06 Otten Henry Machine for grinding and smoothing rollers
US2579604A (en) * 1950-04-19 1951-12-25 Otto C Niederer Egg cleaning device
US2936555A (en) * 1958-11-12 1960-05-17 Pittsburgh Plate Glass Co Manufacture of plate glass

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085548A (en) * 1976-02-21 1978-04-25 Newalls Insulation Company Limited Apparatus for manufacture of insulation products
US4048761A (en) * 1976-07-09 1977-09-20 Champion International Corporation Paper stick pointing apparatus
US4240231A (en) * 1978-09-05 1980-12-23 Lawrence Day Rectilinear work finishing apparatus
US4514937A (en) * 1981-02-05 1985-05-07 Basf Aktiengesellschaft Method for the surface treatment of magnetic recording media
US4676029A (en) * 1983-07-15 1987-06-30 Helical Springs Limited Of Lytham Ind. Est. Park Opposed endless belt grinding apparatus
US6220940B1 (en) * 1999-10-27 2001-04-24 Grinding Equipment & Machinery Co., Inc. Micro-finishing apparatus
WO2013110746A3 (de) * 2012-01-27 2013-09-19 Thielenhaus Technologies Gmbh Verfahren und vorrichtung zur microfinishbearbeitung von rotationssymmetrischen werkstücken im kontinuierlichen durchlaufverfahren
US9718210B1 (en) * 2013-04-08 2017-08-01 Parrot Wizard Inc Method of fabricating a wooden perch
CN105081934A (zh) * 2015-08-21 2015-11-25 张继兰 一种铸造件打磨装置
CN109079628A (zh) * 2018-07-12 2018-12-25 蚌埠市瑞泰汽配制造有限公司 一种滤清器壳体面的打磨装置
CN110814967A (zh) * 2019-10-30 2020-02-21 方国亮 一种用于铝合金管外表面抛光设备

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Publication number Publication date
JPS5016996A (enrdf_load_stackoverflow) 1975-02-22

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