US3509864A - Grinding wheel profiling device - Google Patents

Grinding wheel profiling device Download PDF

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Publication number
US3509864A
US3509864A US664739A US3509864DA US3509864A US 3509864 A US3509864 A US 3509864A US 664739 A US664739 A US 664739A US 3509864D A US3509864D A US 3509864DA US 3509864 A US3509864 A US 3509864A
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United States
Prior art keywords
wheel
axis
dressing
grinding
shaft
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Expired - Lifetime
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US664739A
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English (en)
Inventor
Friedrich Striepe
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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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
    • 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
    • B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like
    • B24B53/085—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
    • 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
    • B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms

Definitions

  • the invention relates to mechanisms for dressing or trueing grinding wheels which are profiled with a predetermined contour for cutting shaft splines.
  • the particular feature of the invention resides in the use of a cylindrical diamond wheel which is power-rotated and guided in a path to follow the peripheral contour of grinding wheels of predetermined shape. Such diamond wheels will considerably outlast diamond points conventionally used for the purpose.
  • the mechanism provides for a motor rotated diamond wheel wherein the axis of rotation is transverse to the axis of the grinding wheel being dressed. By rotating both the grinding wheel and the trueing wheel in the course of dressing, an oblique relative motion of the peripheries is effected wherein the peripheral speed of the dressing wheel can be equal to that of the grinding wheel during dressing.
  • the prior art has heretofore used diamond trueing wheels which are specially profiled for dressing grinding wheels. Such specially profiled wheels match the profiles of grinding wheels they are intended to dress and are very expensive. Furthermore, any wear in the profile of such a diamond wheel causes inaccuracies in the dressing process. However, in the present invention a cylindrical diamond wheel is used and accordingly wear of such a wheel does not cause inaccuracy.
  • Further prior art is shown in the US. patent to Striepe, 3,242,918, owned by the assignee of the present application and issued to the inventor of the present application. This prior art patent shows a mechanism for guiding a diamond point to elfect trueing of profiled grinding wheels. There is a general similarity in the mechanism of the aforementioned patent and the mechanism of the present invention; accordingly, recourse may be had to the patent for details of information not included in the present application.
  • the invention comprises a cylindrical dressing wheel of substantially smaller radius than the radius of the shaft on which splines are to be cut by the grinding wheels.
  • the trueing wheel is carried on an elongated shaft rotated by a small electric motor.
  • the combination com-- prising the dressing wheel, shaft and motor is carried in a rotative carrier wherein such rotative carrier is rotated on a predetermined axis for effecting dressing of the arcuate portion of the periphery of a grinding wheel.
  • the dressing wheel is translated linearly to dress a straight beveled flank, followed by a bodily rotation of the dressing wheel to a position for arcuate movement to dress an arcuate periphery, and thence followed by another bodily rotation and finally a translation to dress another straight-sided flank.
  • the radius of the dressing wheel is greater than the chordal width of the splines to be provided on the shaft.
  • FIG. 1 is a diagrammatic illustration of the movement of a dressing or trueing wheel in dressing the peripheral contour of grinding wheels, wherein the radius of the dressing wheel is greater then the chordal width of a spline to be ground on a shaft,
  • FIG. 2 is a longitudinal cross-section showing the major components of the mechanism foractuating the motion of the dressing wheel, and represents a section through IIII of FIG. 3, and
  • FIG. 3 is a cross-section through III-III of FIG. 2.
  • a shaft 1 (FIG. 1) is illustrated in phantom, having the axis H and base circle 2.
  • Splines 3 of width b are to be ground.
  • Grinding wheels 5 and 6 are profiled to cut straight flank splines as by the straight conical surfaces 7 and 8.
  • the base surfaces are arcuately cut to the base shaft radius R by the inner peripheral curved grinding surfaces 9 and 10 of Wheels 5 and 6, respectively.
  • a cylindrical diamond dressing wheel 157 is shown in FIG. 1 having a radius r less than R but greater than the spline width b, and is illustrated in several positions I- VI.
  • the actual initial position is shown at IV, but for purposes of explanation it is assumed to be in an initial position designated 'as I.
  • the location of an axis N is indicated at position I.
  • This is the rotational axis of a carrier disc 102 (FIG. 2) which is reversibly rotatable and which carries the electric motor 158 and rotary shaft and supporting structure, S, for dressing wheel 157 which rotates on axis 159 between axes H and N.
  • the disc 102 is translated so that the axis N moves to the location shown in position II of FIG. 1. At this time it is rotated so as to bodily swing the axis 159 of wheel 157 on the arc A about axis N to position III, the swing being The point at which the linear (I to II) motion ceases and the arcuate (II to III) motion of the wheels 157 commences is subsequent to the grinding of surface 8, and when the axis N has moved to a point which is from the axis H.
  • axis 159 occurs when axes H and N are alined with the radial center lines of thie splines adjacent the exterior grinding wheel flanks 7 an 8.
  • the diamond trueing wheel and its immediate associated mechanism is linearly translated by the linear translational movement of a crosshead 129 guided on posts 128 and 128a, all carried in a bracket 120.
  • Springs 131 and 131a are utilized to bias the crosshead, together with its own weight, downwardly against a stop pin 130 in bracket 120.
  • the carrier disc 102 3 is rotatably mounted in crosshead 129 so as to rotate about the axis N.
  • Bracket 120 is carried by collar 124, rotative on axis H on bearing surface 125a of housing 125.
  • the carrier disc 102 has a flange 105 secured to it which flange has abutment shoulders 106 and 107 abuttable with respective sides of fixed stop 108 carried by the crosshead 129. This limits rotation of carrier 102, in either direction around axis N, and constrains the motion to 90 either way as will be apparent from the opposite positions of the shoulders on the flange.
  • the rotary motion of carrier 102 is effected by a rotary cam 115 wherein crescent shaped cam grooves 150 actuate respective cam levers 111 and '112 having respective follower pins 113 and 114 in the cam grooves.
  • rotation of the cam 115 in one direction or the other will cause a respective cam lever to move upwardly against a spring pressed pad 117.
  • the action is shown and described in Striepe 3,242,198 (FIGS. 7 and 8) and accordingly need not be repeated here.
  • the upper ends of the cam levers are pivoted as by pins 109 and 110 to the flange 105 and thus serve to rotate that flange 105 and the carrier 102 secured thereto in a direction depending upon the direction of rotation of the cam 115.
  • the spring pressed pad 117 bears against the rollers 116 and 116a of levers 111 and 112, respectively, maintaining the cam levers in an initial symmetrical position as shown in FIG. 3; the cam pins 113 and 114 abut at the corners of the cam grooves in readiness for movement.
  • the trueing wheel 157 is in its actual initial position as shown at IV in FIG. 1 at this time.
  • wheel 157 is translated to dress surfaces 7 and 8 when bracket 120 is translated and is bodily swung around axis N when carrier disc 102 is rotated, and is swung around axis H to dress surfaces 9 and when collar 124 is rotated.
  • a shaft 118 is shown as integral and axially alined with cam disc 115 and will be understood to effect rotation of the cam disc.
  • Shaft 118 is rotatively carried in sleeve 119 which is integrally flanged to the bracket 120.
  • Bracket 120 is linearly slidable in guide means 121 provided on both sides of the bracket and which guide means is integral with collar 124 heretofore described as rotatively carried in housing 125.
  • Housing 125 is a support integral with a base 141.
  • the collar 124 carries an adjusting screw 123 whereby the bracket 120 can be radially moved in the guide means 121 for the purpose of setting the distance between the shaft H and the surfaces 9, 10 of the grinding wheel which is equal to R.
  • the support means S houses the shaft 165 of the dressing wheel which is driven by a motor 158.
  • the motor 158 is socketed in a slide 162 longitudinally movable in guide rails 163 of the carrier disc 102.
  • a lug 160 is fixed to the carrier disc.
  • An adjusting screw 16 1 is inserted in a thread of the lug. The lower end of the adjusting screw enters into a cavity of the slide 162 to which it is fixed by a locking washer 164.
  • the screw 161 is turned for the purpose of moving the slide along the guide 163 and thereby setting the distance between the periphery of the trueing wheel and the axis N of the carrier disc, which distance must be equal to half the Width of the splines (b/ 2)
  • the distance b/ 2 is regulated by setting the screw 161.
  • the distance b/2 being correct, the radius R is determined by turning the screw 123.
  • Collar 124 has a rear arm 126 integral therewith which carries a peg 127 intermediate and abuttable with each of a pair of predeterm-inedly spaced stops 1127a carried in flanges of housing 125 depending upon direction of rotation of collar 124.
  • Another pair of stops 127b can also be utilized.
  • the pairs of stops 127a, or 127b are spaced such that collar 124 moves within an angle of 45 for eight spline shafts, and 60 for six spline shafts.
  • Striepe Patent 3,242,918 illustrates the arrangement (FIG. 5) just described. Different pegs such as 127 cooperate with a pair of stops 127a, or 127b respectively, depending on whether six or eight splines are to be cut.
  • Cam disc 115 is rotated by shaft 118 which has a gear 132 keyed at its exterior end meshing with a gear 133 rotatively carried by sleeve 119 and having a manually operable crank lever 135.
  • a detent ring 136 having a longitudinal slot is secured at the outer end of sleeve 119 integral with bracket 120 and a spring pressed pawl 137 carried by sleeve 119 serves to effect an initial locking of the bracket 120 and cam 115. This effects the initial position of wheel 157 (FIG. 1) and for the cam levers 111 and 112 (FIG. 3) in coaction with the spring pressed pad 117.
  • lever 135 is vertical and intermediate stops 127a (or 12717) as shown and described in Striepe Pat. 3,242,918 (FIG. 5).
  • crosshead 129 is slanted parallel to wheel surface 8 and rotation of the system is stopped by abutment of peg 127 with a stop 127a, the pawl 137 is forced out of the slot in ring 136 and continued rotation of lever 135 will cause gear 133 to rotate gear 132 thus rotating shaft 118 and cam disc 115 counter-clockwise as viewed on FIG. 3.
  • Cam lever 112 is then actuated by cam pin 114, being raised to effect rotation of the flange 105 causing rotation of carrier disc 102 to which it is secured.
  • the 90 rotation is predetermined by the shoulder 106 of flange abutting the stop 108 carried in the crosshead 129.
  • the slidable base 141 it will be understood to be carried on the grinding machine and it also carries the tail stock 101 and dead center 100. Noting that the shaft 1 to be ground has one end carried in the tail stock, and it being understood that the grinding wheels 5, 6 are fixed in position, it will be understood that sliding of the base 141 to the left will bring the diamond wheel into position for dressing the grinding wheels, or sliding the base 141 to the right will bring the shaft 1 into position for spline grinding.
  • the plane of the dressing Wheel 157 is normal to the plane of the grinding wheels and that the axis 159 is transverse to the axis K of the grinding wheels which are supported in any suitable manner for rotation on a shaft G having the rotary power means M.
  • the plane of the dressing wheel is generally normal to a diametric plane taken vertically and containing the axis K.
  • Axis H is at a distance corresponding to the distance between the work or shaft center and the base radius R as will be apparent from FIG. 1.
  • the dressing Wheel and the grinding wheels have separate rotary motive power means it will be understood that a ratio of peripheral speeds can be provided and it has been found advantageous for the grinding wheel to rotate with a peripheral dressing speed approximately equal to the peripheral speed of the dressing wheel so that the abrasion lines will run obliquely to the periphenal movement of the grinding wheels.
  • said slide block adjustment means comprising a member 161 having threaded coaction with said carrier 102 and engaging said slide block 162 for radially adjusting said slide block to adjust the position of said shaft S.
  • said slide block carrying a motor and said shaft extending outwardly of said motor normal to the path of radial adjustment of said slide block.
  • said slide block carrying a motor and said shaft extending outwardly of said motor normal to the path of radial adjustment of said slide block.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US664739A 1966-09-03 1967-08-31 Grinding wheel profiling device Expired - Lifetime US3509864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ0012410 1966-09-03

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US3509864A true US3509864A (en) 1970-05-05

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US (1) US3509864A (de)
CH (1) CH454661A (de)
DE (1) DE1577534A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059067A1 (de) * 2000-11-28 2002-06-06 Peter Baeumler Verfahren und Vorrichtung zur Herstellung von Zahnriemenformen und Zahnrädern
DE102009041381A1 (de) * 2009-09-12 2011-04-21 Saint-Gobain Diamantwerkzeuge Gmbh & Co. Kg Verfahren zum Abrichten von Schleifscheiben

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422220A (en) * 1944-02-03 1947-06-17 Super Tool Company Diamond wheel dresser
US2449372A (en) * 1944-11-15 1948-09-14 Lincoln Park Ind Inc Compensating abrasive wheel dressing machine
US3121423A (en) * 1960-06-03 1964-02-18 Landis Tool Co Profile dressing device for grinding wheels
US3242918A (en) * 1961-09-02 1966-03-29 Zahuradfabrik Friedrichshafen Dressing tool for spline shaft grinding machines
US3273555A (en) * 1964-01-22 1966-09-20 Cincinnati Milling Machine Co Method and apparatus for distributing wear of truing roller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422220A (en) * 1944-02-03 1947-06-17 Super Tool Company Diamond wheel dresser
US2449372A (en) * 1944-11-15 1948-09-14 Lincoln Park Ind Inc Compensating abrasive wheel dressing machine
US3121423A (en) * 1960-06-03 1964-02-18 Landis Tool Co Profile dressing device for grinding wheels
US3242918A (en) * 1961-09-02 1966-03-29 Zahuradfabrik Friedrichshafen Dressing tool for spline shaft grinding machines
US3273555A (en) * 1964-01-22 1966-09-20 Cincinnati Milling Machine Co Method and apparatus for distributing wear of truing roller

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DE1577534A1 (de) 1970-03-19
CH454661A (de) 1968-04-15

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