US3894358A - Mounting arrangement for a grinding wheel dressing device - Google Patents

Mounting arrangement for a grinding wheel dressing device Download PDF

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Publication number
US3894358A
US3894358A US437520A US43752074A US3894358A US 3894358 A US3894358 A US 3894358A US 437520 A US437520 A US 437520A US 43752074 A US43752074 A US 43752074A US 3894358 A US3894358 A US 3894358A
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US
United States
Prior art keywords
dressing
gear
base
grinding
spindle stock
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
US437520A
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English (en)
Inventor
Manfred Lorenz
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.)
KAPP AND CO WERKZEUGMASCHINENFABRIK
KAPP AND CO
Original Assignee
KAPP AND 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
Priority claimed from DE19732306696 external-priority patent/DE2306696C3/de
Application filed by KAPP AND CO filed Critical KAPP AND CO
Application granted granted Critical
Publication of US3894358A publication Critical patent/US3894358A/en
Anticipated expiration legal-status Critical
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
    • B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
    • 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

Definitions

  • Helically fluted gear cutters when ground with this type of grinding wheel, have a tooth face which is convex in planar cross section and to which the theoretical tooth face line is a tangent. This undesirable convexity decreases with decreasing grinding wheel diameters and increasing angles of grinding wheel taper. It then becomes necessary to very accurately adjust the dressing device to the selected angle of taper.
  • the invention suggests that the grinding wheel dressing device be pivotally attached to the grinder base, the pivot axis being perpendicular to the axis of the grinder spindle and coincident with the pivot axis of the pivotable spindle stock carrier.
  • a rotational drive connection between the spindle stock carrier and the wheel dressing device which, when the spindle stock carrier is rotated in relation to the grinder base, executes a proportional angular motion of the wheel dressing device in relation to the spindle stock carrier.
  • the invention suggests a rotational drive connection including a first gear which is solidary with the grinder base, a second gear which is solidary with the spindle stock carrier, and a train of several gears interconnecting the first and second gears.
  • the overall translation of this rotational drive is such that the rotational angle executed by the wheel dressing device is in each case twice the rotational angle executed by the spindle stock carrier in relation to the fixed grinder base.
  • An additional feature of the preferred embodiment of the invention suggests a grinder base having an overall shape of an inverted the spindle stock carrier being pivotally supported between the parallel legs of the base.
  • the pivot support preferably consists of two trunnions extending laterally from the spindle stock carrier into journals inside the base legs, one of the trunnions extending into the housing of the wheel dressing device where it carries the earlier-mentioned second gear which, by cooperating with the fixed first gear which is attached to the adjacent leg of the grinder base, angularly positions the wheel dressing device in relation to the spindle stock carrier.
  • a pivoting adjustment of the grinder around an axis which is perpendicular to the cutter axis does not affect the angular adjustment of the wheel dressing device in relation to the grinding wheel.
  • the device of the invention automatically provides an accurate resetting of the displacement direction of the dressing point in accordance with the new taper outline.
  • the primary advantage of the novel grinding wheel dressing device of the invention is its versatility of application, without the need for additional adjustment devices, making it suitable for a broad range of grinding wheel diameters and wheel taper angles. Furthermore, the device is extremely simple in construction and therefore inexpensive to manufacture. Additional savings of investment costs are achieved through the fact that the wide range of pivotability of the spindle stock carrier and of the wheel dressing device eliminates the need for a special cutter grinding unit for small, steeply angled grinding wheels.
  • FIGJ'l is a frontal end view of a grinding unit with a grinding wheel dressing device embodying the invention.
  • FIG. 2 is an elevational side view of the device of FIG. 1;
  • FIG. 3 is a rear end view of the device of FIG. 1, a partial vertical cross section exposing the rotational drive connection.
  • FIGS. l3 DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a grinding unit which is part of a grinding machine (not shown). It consists essentially of a grinder base with two parallel downwardly extending legs in the form of an inverted U, which carry between them a pivotable spindle stock carrier 2, 'which in turn carries a longitudinally adjustable spindle stock 3 with a grinding spindle 4 and a grinding wheel 5.
  • the pivotable support between the grinder base 1 and the spindle stock carrier 2 is provided in the axis 6 (see FIG. 3) in which the spindle stock carrier has attached to it two trunnions 6a and 6b engaging appropriate journal bearings in the grinder base legs.
  • This dressing unit 7 On one side of the grinder base 1 is mounted a grinding wheel dressing unit 7 which is likewise pivotable around the earlier-mentioned axis 6.
  • This dressing unit 7 includes a guide arm 8 along which a dressing head with a dressing point 10, for example a diamond, is longitudinally movable by means of a carriage 9.
  • the pivot trunnion 6b on the side of the dressing unit extends laterally through the grinder base leg into the housing of the dressing device 7.
  • a first worm gear, or base worm gear 11 Surrounding the trunnion 6b and nonrotatably attached to the grinder base leg is provided a first worm gear, or base worm gear 11 which is engaged by a cooperating worm 12 journalled in said housing.
  • a second worm gear, or trunnion worm gear 16 is attached to the far end of trunnion 6b and cooperates with a worm which is similarly journalled in the housing.
  • the worms l2 and 15, in turn, are interconnected by means ofspur gears 13 and 14 in the manner of a planetary gear train.
  • the housing of the dressing unit 7 is arranged for rotation in relation to the grinder base 1 by being supported on a shoulder of the worm gear 11, its angular position being determined by the angular position of the trunnion worm gear 16 in relation to the fixed based worm gear 11.
  • the grinding of the cutting faces of a gear cutter teeth 17 requires a pivoting adjustment of the spindle stock carrier 2 and a longitudinal adjustment of the spindle stock 3 so that the taper line of the grinding wheel 5 is properly oriented in relation to the cutter axis (not shown).
  • the grinding wheel dressing device 7 of the invention is so arranged that it can dress the grinding wheel 5 on the grinding locus, i.e. the taper line which is diametrically opposite to the taper line engaging the tooth face.
  • the orientation of the dressing point guide arm 8 must accordingly be adjusted by twice the angular displacement of the spindle stock carrier in relation to the grinder base 1.
  • the spindle axis may have to be inclined at an angle of 75 from the grinding plane.
  • the corresponding displacement path of the dressing point 10 is rotated from the grinding plane by an angle of
  • the angular adjustment motion of the spindle stock carrier 2 in relation to the grinder base 1 and the consequent angular motion of the wheel dressing unit 7, which is of equal angle in relation to the spindle stock carrier 2 and therefore twice that angle in relation to the grinder base 1, is obtained as a continuous adjustment motion through rotation of the worm 15.
  • the shaft carrying worm 15 may include suitable cranking means.
  • the two spur gears 13 and 14 which interconnect the worms 12 and 15 are preferably identical in size, and the two worm gear drives 11, 12 and 15, 16 are preferably likewise identical in diameter.
  • the worms l2 and 15 have opposite helices, the helix angle of the base worm gear drive 11, 12 being larger than that of trunnion worm gear drive l5, 16 so that the translation ratio of the former is double that of the latter.
  • At least the smaller helix angle of gears 15, 16 is preferably selflocking, i.e. small enough to make the drive non-reversing, under a force acting on the trunnion worm gear 16.
  • the angular adjustment of the orientation of the dressing guide arm 8 is thus obtained automatically and positively for each size and taper angle of the grinding wheel 5.
  • the displacement path of the dressing point 10 need not always be a straight line, as in the case with the straight-line guide of arm 8.
  • This displacement path could for instance also be made curved for the dressing of a convexly corrected grinding contour, in order to compensate for the earlier mentioned distortion in connection with helically fluted gear cutters.
  • a grinding and grinding wheel dressing device comprising in combination:
  • a spindle stock assembly supported by the grinder base, said assembly including a grinder spindle carrying a grinding wheel mounted on one end thereof; the grinding wheel having a frustumshaped outline, with a tapered peripheral grinding face oriented radially outwardly and axially toward the spindle stock, a tangent plane to said grinding face being the grinding plane;
  • said mechanical translation means interconnects the spindle stock assembly pivoting means and the dressing head path reorienting means in such a way that a given angular displacement of the former requires twice that angular displacement of the latter in reference to the grinder base.
  • said mechanical translation means is a gear drive which rotationally interconnects the dressing head path reorienting means with the grinder base on the one hand and with the spindle stock assembly pivoting means on the other hand.
  • the spindle is journalled to the spindle stock assembly, and the spindle stock assembly pivoting means includes a first pivot connection between the spindle stock assembly and the grinder base;
  • the dressing head guide means is part of a dressing unit
  • the dressing head path reorienting means includes a second pivot connection between the dressing unit and the grinder base which is coaxial with said first pivot connection.
  • the grinder base is generally U-shaped, having two parallel spaced legs as part of said shape;
  • the spindle stock assembly is arranged between the base legs and includes a spindle stock and a spindle stock carrier relative to which the spindle stock is longitudinally adjustable;
  • the first pivot connection is defined between the spindle stock carrier and the two base legs and includes oppositely extending trunnions attached to the spindle stock carrier and journalled in said legs.
  • one of the trunnions of the first pivot connection is elongated to extend laterally beyond the respective base leg and includes a trunnion gear attached thereto;
  • said grinder base leg has a base gear nonrotatably attached thereto in concentric relationship with the elongated trunnion;
  • the dressing unit encloses the elongated trunnion by forming said coaxial second pivot connection with the grinder base while further including: a planetary gear train mounted in the dressing unit, the gear train engaging said trunnion gear with one end of the train and said base gear with the other end of the train, whereby a given angular displacement of the trunnion gear in relation to the base gear determines twice that angular displacement of the planetary gear train in relation to the base gear.
  • the trunnion gear and the base gear are worm gears and the ends of the gear train are cooperating worms, the gear train further including two shafts mounted in the dressing unit and carrying said worms, and two cooperating spur gears on the two shafts connected to the worms, respectively.
  • the two worms and cooperating worm gears on the trunnion and base leg, respectively, are substantially identical in diameter, but have opposite helix angles, the helix angle of the trunnion worm gear being greater than the helix angle of the base worm gear for a gearing ratio which is twice that of the latter.
  • the helix angle of at least one worm gear is small enough to render it self-locking, i.e. non-reversible
  • the gear train further includes means for manually cranking it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Gear Processing (AREA)
US437520A 1973-02-10 1974-01-29 Mounting arrangement for a grinding wheel dressing device Expired - Lifetime US3894358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732306696 DE2306696C3 (de) 1973-02-10 Einstellvorrichtung für die Schleifspindel und das Abrichtwerkzeug einer Schleifmaschine

Publications (1)

Publication Number Publication Date
US3894358A true US3894358A (en) 1975-07-15

Family

ID=5871575

Family Applications (1)

Application Number Title Priority Date Filing Date
US437520A Expired - Lifetime US3894358A (en) 1973-02-10 1974-01-29 Mounting arrangement for a grinding wheel dressing device

Country Status (3)

Country Link
US (1) US3894358A (enrdf_load_stackoverflow)
JP (1) JPS56167B2 (enrdf_load_stackoverflow)
IT (1) IT1006980B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6808441B2 (en) 2003-02-07 2004-10-26 Nordent Manufacturing, Inc. Dental tool sharpener and method of use
US20080268750A1 (en) * 2005-02-03 2008-10-30 Fisher David J Apparatus for Manufacturing a Face Gear
US20110067683A1 (en) * 2008-08-15 2011-03-24 O'malley Keith L Machine for truing abrasive wheels
US20120184188A1 (en) * 2011-01-14 2012-07-19 Calvin Chou Disc sander
CN106078369A (zh) * 2016-08-18 2016-11-09 东莞亦准自动化科技有限公司 一种磨刀机
CN111546215A (zh) * 2020-05-21 2020-08-18 浙江亿钛数控机械有限公司 一种充电桩用板材抛光机
CN114473727A (zh) * 2021-12-23 2022-05-13 豪特曼智能装备信阳有限公司 一种多旋转式高刚性的立式磨床

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641554C3 (de) * 1976-09-15 1981-06-25 Maag-Zahnräder & -Maschinen AG, 8023 Zürich Vorrichtung zum Wälzschleifen zylindrischer Zahnräder
JPS5757761Y2 (enrdf_load_stackoverflow) * 1977-08-25 1982-12-11
JPH01314483A (ja) * 1988-06-14 1989-12-19 Matsushita Electric Ind Co Ltd テレビジョン信号受信装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162987A (en) * 1962-11-02 1964-12-29 Ingersoll Rand Co Method of resharpening cutter blades having a contoured cutting edge
US3521405A (en) * 1968-02-14 1970-07-21 Radial Lip Machine Corp Drill grinding apparatus
US3626645A (en) * 1968-10-18 1971-12-14 Renault Method of sharpening twist drills
US3748786A (en) * 1970-04-08 1973-07-31 Hauni Werke Koerber & Co Kg Apparatus for sharpening rotary cutters for tobacco or the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162987A (en) * 1962-11-02 1964-12-29 Ingersoll Rand Co Method of resharpening cutter blades having a contoured cutting edge
US3521405A (en) * 1968-02-14 1970-07-21 Radial Lip Machine Corp Drill grinding apparatus
US3626645A (en) * 1968-10-18 1971-12-14 Renault Method of sharpening twist drills
US3748786A (en) * 1970-04-08 1973-07-31 Hauni Werke Koerber & Co Kg Apparatus for sharpening rotary cutters for tobacco or the like

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6808441B2 (en) 2003-02-07 2004-10-26 Nordent Manufacturing, Inc. Dental tool sharpener and method of use
US20080268750A1 (en) * 2005-02-03 2008-10-30 Fisher David J Apparatus for Manufacturing a Face Gear
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
US20120184188A1 (en) * 2011-01-14 2012-07-19 Calvin Chou Disc sander
US8460068B2 (en) * 2011-01-14 2013-06-11 Calvin Chou Disc sander
CN106078369A (zh) * 2016-08-18 2016-11-09 东莞亦准自动化科技有限公司 一种磨刀机
CN111546215A (zh) * 2020-05-21 2020-08-18 浙江亿钛数控机械有限公司 一种充电桩用板材抛光机
CN114473727A (zh) * 2021-12-23 2022-05-13 豪特曼智能装备信阳有限公司 一种多旋转式高刚性的立式磨床

Also Published As

Publication number Publication date
JPS49112291A (enrdf_load_stackoverflow) 1974-10-25
DE2306696B2 (de) 1976-01-15
JPS56167B2 (enrdf_load_stackoverflow) 1981-01-06
DE2306696A1 (de) 1974-08-22
IT1006980B (it) 1976-10-20

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