US3581730A - Rotary conjugate dresser - Google Patents

Rotary conjugate dresser Download PDF

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Publication number
US3581730A
US3581730A US792677*A US3581730DA US3581730A US 3581730 A US3581730 A US 3581730A US 3581730D A US3581730D A US 3581730DA US 3581730 A US3581730 A US 3581730A
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US
United States
Prior art keywords
dressing
wheel
grinding wheel
cutter
dresser
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
US792677*A
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English (en)
Inventor
Walter A Boyd Jr
Leon J Barnard
Hugo A Lakso
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.)
DPBG Corp A CORP OF DELAWARE
Bryant Grinder Corp
Bryant Chucking Grinder Co
Original Assignee
Bryant Grinder Corp
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 Bryant Grinder Corp filed Critical Bryant Grinder Corp
Application granted granted Critical
Publication of US3581730A publication Critical patent/US3581730A/en
Anticipated expiration legal-status Critical
Assigned to DPBG CORPORATION, A CORP. OF DELAWARE reassignment DPBG CORPORATION, A CORP. OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MARINE MIDLAND BUSINESS LOANS, INC.
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE reassignment FIRST NATIONAL BANK OF CHICAGO, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FIRST NATIONAL BANK OF CHICAGO, THE
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE, AS AGENT reassignment FIRST NATIONAL BANK OF CHICAGO, THE, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRYANT GRINDER CORPORATION,
Expired - Lifetime legal-status Critical Current

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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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls

Definitions

  • This invention relates to wheel dressing in general, but more especially dressing the grinding wheel for the conjugate form grinding of workpieces such as the conical race and flat rib of roller bearing tapered cones.
  • Machine time and man hours being a very significant part of manufacturing cost, it is our object to invent a mechanism which will not only reduce machine down time for replacement or resetting of the dressing tool, but will also speed the actual dressing operation itself.
  • the grinding wheel is dressed by one pass of the conjugate dresser, in which two rotatable abrasive-faced dressing cutters, a track cutter and a rib cutter, dress the grinding wheel.
  • the two cutters are offset relative to each other so as to dress the grinding wheel in order that the grinding wheel will form grind the track and rib of the workpiece in one simultaneous grind.
  • FIG. l is a general environmental view, partially in section, of the conjugate dresser in place on a grinder;
  • FIG. 2 is a plan view with a portion of the guard removed.
  • FIG. 3 is an elevation view looking directly toward the back of the dressing cutter for the rib portion of the grinding wheel
  • FIG. 4 is an elevation view looking directly toward the dressing cutter for the track portion of the grinding wheel
  • FIG. 5 is an elevation view looking at the conjugate dresser along a line parallel to the axis of the grinding wheel
  • FIG. 6 is a section through the elevating mechanism showing the antifriction slides and piston, including the hydraulic circuit;
  • FIG. 7 is an enlarged plan view of the cutters in dressing position showing the track-forming dressing cutter, the ribforming dressing cutter, and the grinding wheel;
  • FIG. 8 is a plan view of the contact between grinding wheel and workpiece.
  • FIG. 1 DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a conventional type of form grinder is mounted on a bed 10.
  • a wheel slide 12 is mounted for crossfeed movement as indicated by arrow 13.
  • the workslide I4 is located on the bed and is mounted for movement longitudinally as indicated by arrow 15, between the grinding position as shown and the dressing position as will be explained later on.
  • the loader mechanism 16 mounted on the workslide 14 is the loader mechanism 16, shown with a magazine 17 containing unground workpieces l9.
  • Loader arm 18 periodically transfers one workpiece 19a from the magazine 17 along arcuate path 20 to work station 21, and deposits it on a magnetic chuck 22, where it is rotated in a typical shoe centerless manner by the workhead hidden behind splash guard 23.
  • the loader arm 18 is shown raised to better view the work station. Normally the arm remains down during the grinding operation.
  • the grinding wheel 24 Directly in front of the work station 21 is the grinding wheel 24 partially hidden under the wheel guard 26.
  • the wheel 24 is crossfed into the workpiece 19a located at the work station 21 until the desired finish size is attained. It is then withdrawn as shown by arrow 13.
  • the finished workpiece I9 is then automatically removed from the work station 22 and dropped into discharge chute 25 in a manner not part of this invention.
  • a dressing operation is required to sharpen the grinding wheel 24. This is performed by the conjugate wheel dresser 28 mounted on the workslide 14 by attaching baseplate 29 over sub-base 30 which is part of the workslide. Baseplate 29 is swiveled horizontally about pivot 31, and locked in position by tee nuts 32 in slot 33, as seen in FIG. 3 and FIG. 4.
  • the conjugate wheel dresser 28 In general, it consists of two abrasive faced dressing cuttersa track cutter 34 and a rib cutter 35each mounted on a motorized spindle. These two cutters are mounted on an elevator block 36, which moves up and down on antifriction slides 37, separating it from a fixed cylinder block 38. The movement direction is indicated by arrow 39, as seen in FIG. 4.
  • the cylinder block 38 which is rigidly bolted to baseplate 29 by bolts 27, contains a hydraulic cylinder 41 (FIG. 6) for moving the elevator block 36 carrying motorized dressing cutter spindles 61 and 69.
  • a piston and rod assembly 40 in the cylinder 41 is connected to the elevator block 36 through bracket 42, as is best seen in FIG. 6. The hydraulic circuit will be explained later on.
  • housing 51 This is attached to the elevator block 36 by screws 52, allowing it to move up and down with. the dresser.
  • an accordionlike bellows 53 is attached between the bottom of the housing 51 and the baseplate 29.
  • FIG. 7 and FIG. 8 show the plan view of the grinding wheel at the dressing station and at the grinding station respectively.
  • FIG. 7 shows the relative positions of the track cutter 34, the rib cutter 35, and the wheel 24.
  • the corresponding position of wheel and workpiece is shown in FIG. 8.
  • the chamfer angle between rib face 55 and chamfer 56 is built into the rib cutter itself, and is not adjustable. Alternatively a radius might be used.
  • the cone angle alpha (0:) (seen in FIG. 7 and FIG. 8), is the angle between the axis 72 of the workpiece and the face of the track cutter 34.
  • the correct angle is set by swiveling the wheel dresser baseplate 29 about pivot 31 and locking the position by means of tee nuts 32 in slot 33 (FIG. 4).
  • the angle theta (0) (FlG. 7 and 8) is set by rotating the swivel plate 64 about its pivot 63 and locking it in position from below with clamp screws 65 (seen in FlG. 4).
  • the distance X (FIG. 7) is adjusted by sliding the gib plate 66 (FlG. 3 and 4) with rib dressing cutter spindle 69 attached, along the guideway 67 milled in swivel plate 64. (A gib for this purpose is machined on the bottom of gib plate 66). The adjustment is then clamped by screws 68 (seen in FlG. 2).
  • the position of the conjugate wheel dresser 28 must be set as a unit so that the grinding wheel 24 will be directly in front of the dresser at the dress position, and the workpiece will be directly in front of the grinding wheel at the grinding position.
  • the method of doing this would be different for each type of form grinder on whichit is installed. ln this embodiment, workslide 14 is traversed as indicated by arrow 15 between adjustable stops (not shown) at each end of travel.
  • the grinding wheel 24 is shown in the grind position at work station 21, about to feed into a workpiece 19a shown on the magnetic chuck 22. (An enlarged view of this is shown in FIG. 8. Grinding wheel 24 is fed into the workpiece along arrow 59 until the finished size stop (not shown) is reached, and then backed off along arrow 59in the reverse direction.
  • the workslide 14 (which also carries the wheel dresser 28 seen in FIG. 1) is shifted through the distance W" (shown in FIG. 7 and FIG. 8) as indicated by arrow 58. This brings the wheel dresser 28 carrying the dressing cutters 34 and 35 into the position formerly occupied by workpiece 19a.
  • the conjugate wheel dresser 28 Prior to this movement W," the conjugate wheel dresser 28 must be raised hydraulically to allow the dressing cutters 34 and 35 to clearthe grinding wheel during traverse.
  • the grinding wheel again cross feeds into the dress stop along arrow 57, and the conjugate wheel dresser 28 is lowered.
  • the rib cutter 35 contacts and passes by the wheel, removing a small portion and exposing a new surface thereon.
  • the elevator block 36 reaches bottom, and remains there in preparation for the next dress cycle.
  • the dressing cycle is not necessarily called for each time a workpiece is ground. It varies with the size of the workpiece and the amount of stock removal. Skip dress," as it is called, might be anywhere between I and 20 workpieces of the type shown. 4
  • solenoid A 18 Prior to dressing, solenoid A 18 energized, shifting the valve to the left and permitting the pressurized oil from pump P" to flow through the valve and hydraulic line 43, check valve 44, variable restrictor 45, and line 46, to orifice 47 in baseplate 29. There is no flow through restrictor 49 because of check valve 48.
  • solenoid 8 When it is desired to lower the conjugate wheel dresser 28, solenoid 8" is energized, which opens line 43 to sump 50 through the valve.
  • the weight of the elevator block 36 and the units mounted on it force the oil out of cylinder 41 back through the orifice 47, line 46, check valve 48, variable restrictor 49, and line 43.
  • the rate of fall of the elevator block 36 is controlled by setting variable restrictor 49, since check valve 44 prevents flow through restrictor 45.
  • piston 40 is formed in two parts for reasons not essential to this invention.
  • An oil entrapment cushion to reduce the shock when the bottom is reached is provided at the lower end of the cylinder in a manner well known to the art.
  • the rate of rise and fall are controlled by adjustment of the variable restrictors 45 and 49, and need not be identical.
  • a wheel-dressing apparatus for dressing a grinding wheel, said grinding wheel adapted to simultaneously grind a plurality of surfaces on a workpiece, said wheel-dressing apparatus comprising:
  • a first dressing cutter mounted on a motor driven spindle on said elevating block;
  • said first dressing cutter contacts said grinding wheel on its front surface thereof, and said second dressing cutter contacts said grinding wheel on its back and edge surfaces as said block is elevated past said grinding wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US792677*A 1969-01-21 1969-01-21 Rotary conjugate dresser Expired - Lifetime US3581730A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79267769A 1969-01-21 1969-01-21

Publications (1)

Publication Number Publication Date
US3581730A true US3581730A (en) 1971-06-01

Family

ID=25157700

Family Applications (1)

Application Number Title Priority Date Filing Date
US792677*A Expired - Lifetime US3581730A (en) 1969-01-21 1969-01-21 Rotary conjugate dresser

Country Status (6)

Country Link
US (1) US3581730A (de)
JP (1) JPS4840517B1 (de)
CH (1) CH508456A (de)
FR (1) FR2028774A1 (de)
GB (1) GB1272790A (de)
SE (1) SE374294B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678915A (en) * 1970-02-11 1972-07-25 Toyoda Machine Works Ltd Truing device for grinding wheel with rotating cup-shaped truing cutter
US3678916A (en) * 1970-03-30 1972-07-25 Toyoda Machine Works Ltd Apparatus for dressing side surfaces of grinding wheels
US3683885A (en) * 1969-10-06 1972-08-15 Toyoda Machine Works Ltd Dressing apparatus with cup shaped dressing wheels
US3747584A (en) * 1972-01-24 1973-07-24 Toyoda Machine Works Ltd Rotary dressing apparatus
US3916581A (en) * 1973-11-29 1975-11-04 Warner Swasey Co Method for dressing grinding wheels
US4374513A (en) * 1978-08-04 1983-02-22 Dieter Wiener Dressing apparatus for cup-type abrasive wheels as used for grinding spiral bevel gearwheels
US4406275A (en) * 1978-07-31 1983-09-27 Hauni-Werke Korber & Co. Kg. Apparatus for dressing and profiling grinding wheels
US5163794A (en) * 1991-04-22 1992-11-17 Cincinnati Milacron Inc. Single plane articulated axis workslide
US20040185760A1 (en) * 2003-03-19 2004-09-23 James Weatherly Shaping apparatus for saw sharpening wheel
US20110067683A1 (en) * 2008-08-15 2011-03-24 O'malley Keith L Machine for truing abrasive wheels
CN102267096A (zh) * 2011-09-01 2011-12-07 宁波耐特嘉机械制造有限公司 滚子轴承滚道凸度磨床砂轮修整器
CN103659607A (zh) * 2013-11-25 2014-03-26 李东炬 核电轴承套圈加工专用万能磨床的金刚石滚轮修整器
CN106312772A (zh) * 2016-10-31 2017-01-11 深圳市比克动力电池有限公司 一种激光焊接压环的打磨装置
CN113334171A (zh) * 2021-06-23 2021-09-03 陈小花 一种加工石墨烯板的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6197567B2 (ja) * 2013-10-16 2017-09-20 株式会社ジェイテクト ツルーイング方法及びツルーイング装置
CN114454095A (zh) * 2022-01-18 2022-05-10 北京烁科精微电子装备有限公司 一种用于抛光垫的修整装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2360127A (en) * 1943-02-23 1944-10-10 Harley Stanley Jaffa Crush-forming operation on grinding wheels
US2477418A (en) * 1945-06-04 1949-07-26 Sheffield Corp Grinding machine with crushdressing attachment
US3273555A (en) * 1964-01-22 1966-09-20 Cincinnati Milling Machine Co Method and apparatus for distributing wear of truing roller
US3428038A (en) * 1965-10-18 1969-02-18 Hoglund Eng & Mfg Co Inc Apparatus for forming contours

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2360127A (en) * 1943-02-23 1944-10-10 Harley Stanley Jaffa Crush-forming operation on grinding wheels
US2477418A (en) * 1945-06-04 1949-07-26 Sheffield Corp Grinding machine with crushdressing attachment
US3273555A (en) * 1964-01-22 1966-09-20 Cincinnati Milling Machine Co Method and apparatus for distributing wear of truing roller
US3428038A (en) * 1965-10-18 1969-02-18 Hoglund Eng & Mfg Co Inc Apparatus for forming contours

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683885A (en) * 1969-10-06 1972-08-15 Toyoda Machine Works Ltd Dressing apparatus with cup shaped dressing wheels
US3678915A (en) * 1970-02-11 1972-07-25 Toyoda Machine Works Ltd Truing device for grinding wheel with rotating cup-shaped truing cutter
US3678916A (en) * 1970-03-30 1972-07-25 Toyoda Machine Works Ltd Apparatus for dressing side surfaces of grinding wheels
US3747584A (en) * 1972-01-24 1973-07-24 Toyoda Machine Works Ltd Rotary dressing apparatus
US3916581A (en) * 1973-11-29 1975-11-04 Warner Swasey Co Method for dressing grinding wheels
US4406275A (en) * 1978-07-31 1983-09-27 Hauni-Werke Korber & Co. Kg. Apparatus for dressing and profiling grinding wheels
US4374513A (en) * 1978-08-04 1983-02-22 Dieter Wiener Dressing apparatus for cup-type abrasive wheels as used for grinding spiral bevel gearwheels
US5163794A (en) * 1991-04-22 1992-11-17 Cincinnati Milacron Inc. Single plane articulated axis workslide
US20040185760A1 (en) * 2003-03-19 2004-09-23 James Weatherly Shaping apparatus for saw sharpening wheel
US20110067683A1 (en) * 2008-08-15 2011-03-24 O'malley Keith L Machine for truing abrasive wheels
US8590523B2 (en) 2008-08-15 2013-11-26 3M Innovative Properties Company Machine for truing abrasive wheels
CN102267096A (zh) * 2011-09-01 2011-12-07 宁波耐特嘉机械制造有限公司 滚子轴承滚道凸度磨床砂轮修整器
CN103659607A (zh) * 2013-11-25 2014-03-26 李东炬 核电轴承套圈加工专用万能磨床的金刚石滚轮修整器
CN106312772A (zh) * 2016-10-31 2017-01-11 深圳市比克动力电池有限公司 一种激光焊接压环的打磨装置
CN113334171A (zh) * 2021-06-23 2021-09-03 陈小花 一种加工石墨烯板的方法
CN113334171B (zh) * 2021-06-23 2022-11-11 陈小花 一种加工石墨烯板的方法

Also Published As

Publication number Publication date
JPS4840517B1 (de) 1973-11-30
FR2028774A1 (de) 1970-10-16
GB1272790A (en) 1972-05-03
CH508456A (de) 1971-06-15
DE1956966A1 (de) 1971-11-25
SE374294B (de) 1975-03-03
DE1956966B2 (de) 1976-05-20

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Date Code Title Description
AS Assignment

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE

Free format text: SECURITY INTEREST;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, THE;REEL/FRAME:005280/0102

Effective date: 19890614

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, AS AGENT

Free format text: SECURITY INTEREST;ASSIGNOR:BRYANT GRINDER CORPORATION,;REEL/FRAME:005304/0072

Effective date: 19890614

Owner name: DPBG CORPORATION, A CORP. OF DELAWARE, VERMONT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MARINE MIDLAND BUSINESS LOANS, INC.;REEL/FRAME:005285/0359

Effective date: 19900322