US3673739A - Arrangement for internal form grinding portions of spherical surfaces - Google Patents

Arrangement for internal form grinding portions of spherical surfaces Download PDF

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Publication number
US3673739A
US3673739A US89790A US3673739DA US3673739A US 3673739 A US3673739 A US 3673739A US 89790 A US89790 A US 89790A US 3673739D A US3673739D A US 3673739DA US 3673739 A US3673739 A US 3673739A
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US
United States
Prior art keywords
grinding wheel
grinding
workpiece
axis
rotation
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 - Lifetime
Application number
US89790A
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English (en)
Inventor
Dante S Giardini
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.)
SHEFFIELD MACHINE TOOL COMPANY A CORP OF OH
Original Assignee
Bendix Corp
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Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
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Publication of US3673739A publication Critical patent/US3673739A/en
Assigned to SHEFFIELD MACHINE TOOL COMPANY; A CORP OF OH. reassignment SHEFFIELD MACHINE TOOL COMPANY; A CORP OF OH. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BENDIX CORPORATION THE
Anticipated expiration legal-status Critical
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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
    • B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor

Definitions

  • ABSTRACT An arrangement for high speed lap grinding ball rod ends and the like including an annular grinding wheel having an internal [52] g 0 semicircular groove extending about its inner Periphe y, While [51] lm Cl 82') 7/00 the workpiece is mounted for rotation at a skewed angle to the [58] Fie'ld 289s axis of the grinding wheel and extends into the peripheral 5l/289'R & groove so as to create a form grinding action with cross grinding. Lubricant is supplied to the internal groove to provide [56] References Cited lubricating fluid under pressure in the grind zone, trapped by an external housing surrounding the wheel, which also serves UNITED STATES PATENTS as a safety retainer therefor.
  • FIG. 1 is a front elevational view in partial section of the grinding arrangement according to the present invention.
  • FIG. 2 is a view of the section taken along line 2-2 of FIG. 1.
  • the wheel head assembly is shown as well as the workhead assembly l2 and the lubricant supply stream 14.
  • the wheel head assembly 10 includes a drive motor 16 drivingly connected to a housing 18, which contains a grinding wheel 20, retained therein by an end plate 22 secured to the housing 18.
  • the grinding wheel 20 has formed therein an internal surface 24, a semicircular groove 26, of the particular appropriate dimensions to produce the part to be ground.
  • a complementary crush roller and appropriate support and drive arrangements may be provided in the manner well known in the art.
  • the work head assembly 12 includes a work drive motor 28 and attached workholder 30, supported so that the axis of rotation thereof is skewed with respect to the axis of rotation of the grinding wheel 20.
  • the work holder 30 is adapted to receive a workpiece 32 to be ground and hold it in registry with the groove 26 during the grinding operation.
  • a feed traversing support 34 and pivot 35 for the work head assembly 12 is provided to allow the workpiece 32 to be aligned and fed into contact with the semicircular groove 26, in amanner well known in the art in other form grinding arrangements.
  • the lubricant supply 14 includes a source of filtered lubricant 36 supplying a nozzle 38 which is situated to direct lubricant into the surface 24 and groove 26. Both the cooling and lubricating needs may be supplied by the lubricant system 14, and the volume and characteristic of the fluid supplied may be selected to be suitable for both these purposes.
  • the drive motor 16 is operated at l0-15,000 rpm, and the rotating workpiece 32 is advanced into the grinding wheel 20. Since the respective axes are skewed with respect to each other, it can be seen that a cross grinding action occurs and each point on the ground surface is ground by each portion about the groove 26 in a rapidly shifting pattern due to the high speed of the drive motor, so that the net effect is a uniformly finished workpiece of a very fine surface finish on the order of 4 rms obtainable.
  • the lubricant is absorbed by the grinding wheel voids and distributed therethrough by centrifugal force until the voids are saturated and further penetration thereof is precluded by the housing 18. At this point, the excess lubricant spills over the edge as indicated to be collected for return to the source 36.
  • the centrifugal force maintains the lubricant in the grind zone at a considerable pressure, since the groove 26 acts as a lubricant channel to tend to retain the lubricant therein, hence insuring that the lubricant will be present throughout the grind zone and eliminating the surface burn and chatter problems normally occurring in this situation due to lubricant starvation.
  • the portion of the spherical surface may be ground from rough to finish in one operation, with a very fine surface finish obtainable without the need for complex or precision apparatus.
  • Apparatus for grinding partially spherical surfaces on a workpiece comprising:
  • a fonn contoured into said internal surface extending about said axis of rotation and being at least partially circular in cross section;
  • Apparatus for form grinding a workpiece comprising: eluding means for directing lubricant into said channel. a grindi wheel mounted for rotation about an axis and The PP of F l zfuflher Including a housing having a form contoured on an inner surface and shaped member surrounding said grinding wheel member about its 5 to tend to retain fl id therein during rotation f Said penpherygrinding wheel;
  • housing extends housing means encasing said grinding wheel periphery about the sides of said grinding wheel extending radially intending radially inward to said inner Surface, ward at least to level of said inner surface. means for directing lubricant into said form;
  • the apparatus of claim 4 further including means for directing a liquid into said channel, whereby after saturation of said grinding wheel voids 'with said liquid said housing prevents further migration of said liquid away from said channel to provide high pressure lubrication in the zone of grinding means for advancing a workpiece into said form, whereby said workpiece is ground to said form by said grinding wheel contour.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US89790A 1970-11-16 1970-11-16 Arrangement for internal form grinding portions of spherical surfaces Expired - Lifetime US3673739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8979070A 1970-11-16 1970-11-16

Publications (1)

Publication Number Publication Date
US3673739A true US3673739A (en) 1972-07-04

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ID=22219595

Family Applications (1)

Application Number Title Priority Date Filing Date
US89790A Expired - Lifetime US3673739A (en) 1970-11-16 1970-11-16 Arrangement for internal form grinding portions of spherical surfaces

Country Status (6)

Country Link
US (1) US3673739A (it)
CA (1) CA947513A (it)
DE (1) DE2156652A1 (it)
FR (1) FR2114733A5 (it)
GB (1) GB1363309A (it)
IT (1) IT940556B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32830E (en) * 1984-03-12 1989-01-17 Gkn Automotive Components Inc. Method of forming a precision ball track
US6306017B1 (en) * 1998-11-30 2001-10-23 WEINGäRTNER MASCHINENBAU GESELLSCHAFT M.B.H. Method and machining tool for producing helically profiled workpieces
US6475073B2 (en) * 1999-04-09 2002-11-05 Naoi Seiki Co., Ltd. Inner diameter grinding wheel and grinding apparatus using the wheel for grinding a cylindrical workpiece
US20120045978A1 (en) * 2010-08-17 2012-02-23 Mueller-Kueps, L.P. Grinding workpiece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2380332A (en) * 1943-05-27 1945-07-10 Abrasive Company Apparatus for introducing a coolant into grinding wheels
US3110993A (en) * 1962-07-18 1963-11-19 Continental Granite Corp Grinding wheel with provision for coolant application
US3200540A (en) * 1963-11-05 1965-08-17 Lavalle & Ide Inc Device for grinding compound-convex surfaces
US3353303A (en) * 1964-11-13 1967-11-21 Ait Ind Inc Art of edging

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2380332A (en) * 1943-05-27 1945-07-10 Abrasive Company Apparatus for introducing a coolant into grinding wheels
US3110993A (en) * 1962-07-18 1963-11-19 Continental Granite Corp Grinding wheel with provision for coolant application
US3200540A (en) * 1963-11-05 1965-08-17 Lavalle & Ide Inc Device for grinding compound-convex surfaces
US3353303A (en) * 1964-11-13 1967-11-21 Ait Ind Inc Art of edging

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32830E (en) * 1984-03-12 1989-01-17 Gkn Automotive Components Inc. Method of forming a precision ball track
US6306017B1 (en) * 1998-11-30 2001-10-23 WEINGäRTNER MASCHINENBAU GESELLSCHAFT M.B.H. Method and machining tool for producing helically profiled workpieces
US6475073B2 (en) * 1999-04-09 2002-11-05 Naoi Seiki Co., Ltd. Inner diameter grinding wheel and grinding apparatus using the wheel for grinding a cylindrical workpiece
US20120045978A1 (en) * 2010-08-17 2012-02-23 Mueller-Kueps, L.P. Grinding workpiece

Also Published As

Publication number Publication date
FR2114733A5 (it) 1972-06-30
IT940556B (it) 1973-02-20
DE2156652A1 (de) 1972-05-31
GB1363309A (en) 1974-08-14
CA947513A (en) 1974-05-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SHEFFIELD MACHINE TOOL COMPANY; A CORP OF OH., OHI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BENDIX CORPORATION THE;REEL/FRAME:004044/0681

Effective date: 19820730

Owner name: SHEFFIELD MACHINE TOOL COMPANY; 3913 WILLOW CREEK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BENDIX CORPORATION THE;REEL/FRAME:004044/0681

Effective date: 19820730