GB709246A - Improvements in processes and apparatus for making piston rings - Google Patents

Improvements in processes and apparatus for making piston rings

Info

Publication number
GB709246A
GB709246A GB8100/52A GB810052A GB709246A GB 709246 A GB709246 A GB 709246A GB 8100/52 A GB8100/52 A GB 8100/52A GB 810052 A GB810052 A GB 810052A GB 709246 A GB709246 A GB 709246A
Authority
GB
United Kingdom
Prior art keywords
rings
ring
rollers
grinding wheel
engagement
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.)
Expired
Application number
GB8100/52A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB709246A publication Critical patent/GB709246A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/11Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding the circumferential surface of rings, e.g. piston rings

Landscapes

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

Abstract

709,246. Making piston rings. GENERAL MOTORS CORPORATION. March 31, 1952 [April 10, 1951 ; May 3, 1951], No. 8100/52. Class 83 (2). [Also in Group XXIII] A machine for forming a piston ring comprises a device having a plurality of elements adapted to be spaced around the outer periphery of the ring for constricting and holding it in circular form, and a grinding device for reducing the outer peripheral surface of the ring to circular form. To form the rings, round steel wire is rolled to a rectangular section and wound in the form of a helix, each coil of which is cut. The rings 1, Fig. 2, thus produced are clamped on an oval mandrel 5 by clamp bars 13 and a clamping plate 15 with an annular flange 19, after which they are heat treated in an electric furnace 21 so that they retain their clamped shape. The flat faces of each ring are then ground between two flat rotating grinding wheels before it is constricted to circular form by means of a ring of tapered rollers 67. Fig. 8, and a clamping flange 81 which is displaced axially between the rollers by a bolt 88 to drive the ring along the tapered portions of the rollers and on to a circular portion 69. The ring is now rotated in contact with a grinding wheel 95 by an electric motor 37 which through a reduction gear drives a shaft 51 carrying a gear 55 meshing with pinions 77 secured to the roller shafts. Pilot pins 91 maintain the flange in alignment with the rollers. In a modification, the grinding wheel rotates about an axis parallel with the shaft 51 and the outer peripheral surface of the ring engages arcuate guide portions at each side of its area of contact with the wheel. A quick release mechanism is provided for the flange 81 in the form of a plate 89 which has a slot 90 to enable it to be slipped out of engagement with the bolt 88. In a further modification, the rollers are cylindrical with an annular recess into which the ring is inserted by first bending its ends into overlapping relation, no clamping flange being necessary. The rings may be automatically fed to the grinding wheel by the apparatus shown in Figs. 13 and 15 in which a stack of rings is intermittently fed past a grinding wheel 371 by a plunger 325 reciprocated by fluid pressure. The stroke of the plunger is controlled by adjustable stops 324 and a fresh ring is fed through a shoot 299 to the stack on each movement of the plunger. The rings are contacted prior to engagement with the grinding wheel and allowed to expand after engagement by tapered bores 283 while rollers 327 rotate the rings during the period of engagement. The rollers are rotated by a chain drive 351, reduction gear 357 and belt drive 353 from an electric motor 369. The rings leave the apparatus by way of a delivery shoot 304. Stationary ring guiding means are provided at each side of the area of contact between the rings and the grinding wheel. The outer peripheral surfaces of the rings may also be ground by assembling them with the aid of a cylindrical jig on a mandrel which is then inserted axially into abrading relation with a number of honing stones arranged in a circle and secured in a hollow oscillatable and variable stroke head. The rings are allowed to expand into engagement with the stones by temporarily loosening the clamping means. The operation may be terminated with the rings loose on the mandrel. The interior of the rings is bored to a true cylindrical surface while they are held compressed in a cylindrical sleeve. After boring they are mounted on an arbor and oil grooves and chamfered surfaces are cut by forming tools after which the external surface is finish ground. The gaps in the ends of the rings are next milled off while the ring is supported in a hinged two part cylindrical fixture. The rings are finished by electroplating and further grinding.
GB8100/52A 1951-04-10 1952-03-31 Improvements in processes and apparatus for making piston rings Expired GB709246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US709246XA 1951-04-10 1951-04-10

Publications (1)

Publication Number Publication Date
GB709246A true GB709246A (en) 1954-05-19

Family

ID=22098182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8100/52A Expired GB709246A (en) 1951-04-10 1952-03-31 Improvements in processes and apparatus for making piston rings

Country Status (1)

Country Link
GB (1) GB709246A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463487A (en) * 1981-04-30 1984-08-07 Associated Engineering Italy S.P.A. Method of manufacturing piston rings
CN105881145A (en) * 2016-06-15 2016-08-24 常州市荣顺电子有限公司 Special flange disc polishing machine with good fixation effect
CN112059830A (en) * 2020-09-09 2020-12-11 朱伟人 Automatic finish machining system for manufacturing piston ring of automobile engine
CN115401568A (en) * 2022-09-22 2022-11-29 安庆帝新机电设备有限公司 Floating seal ring polishes and uses automatic unloader

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463487A (en) * 1981-04-30 1984-08-07 Associated Engineering Italy S.P.A. Method of manufacturing piston rings
CN105881145A (en) * 2016-06-15 2016-08-24 常州市荣顺电子有限公司 Special flange disc polishing machine with good fixation effect
CN105881145B (en) * 2016-06-15 2018-03-09 常州市荣顺电子有限公司 A kind of ring flange special grinding machine of good fixing effect
CN112059830A (en) * 2020-09-09 2020-12-11 朱伟人 Automatic finish machining system for manufacturing piston ring of automobile engine
CN115401568A (en) * 2022-09-22 2022-11-29 安庆帝新机电设备有限公司 Floating seal ring polishes and uses automatic unloader
CN115401568B (en) * 2022-09-22 2023-10-20 安庆帝新机电设备有限公司 Automatic discharging device for floating seal ring polishing

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