US3313285A - Impregnated indexing roller for grinding wheel dressers - Google Patents

Impregnated indexing roller for grinding wheel dressers Download PDF

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Publication number
US3313285A
US3313285A US362677A US36267764A US3313285A US 3313285 A US3313285 A US 3313285A US 362677 A US362677 A US 362677A US 36267764 A US36267764 A US 36267764A US 3313285 A US3313285 A US 3313285A
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US
United States
Prior art keywords
roller
grinding wheel
dressing
relay
relay contact
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
US362677A
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English (en)
Inventor
Ralph E Price
Jr William P Flohr
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.)
Landis Tool Co
Original Assignee
Landis Tool 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 Landis Tool Co filed Critical Landis Tool Co
Priority to US362677A priority Critical patent/US3313285A/en
Priority to SE4062/65A priority patent/SE319402B/xx
Priority to DEL50510A priority patent/DE1289449B/de
Priority to GB17157/65A priority patent/GB1038435A/en
Priority to CH571165A priority patent/CH436012A/fr
Priority to NL6505302A priority patent/NL6505302A/xx
Application granted granted Critical
Publication of US3313285A publication Critical patent/US3313285A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B53/081—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 by means of a template

Definitions

  • the invention relates to dressing tools for grinding wheels, particularly dressing tools of the type comprising a rotatable cylindrical disc or roller having uniformly distributed cutting particles.
  • the dressing tool in the form of a roller or wheel may be arranged for continuous rotation by a motor as in US. Patent 3,121,423, granted Feb. 18, 1964.
  • the dressing roller is held in fixed angular position during a dressing operation and is rotated incrementally between dressing operations by an indexing device such as a one-way clutch or other suitable mechanism.
  • an indexing device such as a one-way clutch or other suitable mechanism.
  • the one-Way clutch does not interfere with such rotation.
  • the motor may be omitted.
  • indexing devices actuated both manually and mechanically have been used for indexing single point diamonds.
  • the only reason for indexing a single point diamond is to present diiferent portions of the same large cutting particle to the grinding wheel to change from a worn fiat surface on the particle to a sharp edge on said particle.
  • the diamond turner is not intended to solve the problem of heat and wear which occurs in a single point diamond during a single pass across the grinding wheel. Such wear causes a taper to be dressed on the grinding wheel.
  • many single point dressing devices have been replaced by continuously rotated diamond impregnated tools.
  • the continuously rotating tool represents an entirely different approach to the problem of dressing a grinding wheel. It presents a plurality of continuously changing sharp cutting elements to the grinding wheel, distributing the cutting action of the dressing tool over a large number of small easily cooled cutting particles, and producing a result not possible with single point diamonds. With this device, the problems of taper due to diamond wear in a dressing operation is eliminated.
  • the dressing roller is held in a fixed angular position during a dressing operation and is rotated by increments so that a different portion of the dressing roller is presented to the grinding wheel for each dressing operation.
  • Each portion of the roller presents a different combination of cutting particles to the grinding wheel.
  • Indexing the dressing roller from one fixed angular position to another presents additional advantages.
  • the quality of a dressing operation as determined by work finish is a decided improvement over that obtained from previous dressing devices and methods.
  • Another object is to eliminate taper in the dressing of grinding wheels.
  • Another object is to provide a dressing device in which dressing will be performed over a plurality of cutting particles.
  • Another object is to provide a rotatable dressing device which can be indexed from one angularly fixed position to another to present different sets of cutting particles to a grinding wheel.
  • Another object is to present the dressing roller to the grinding wheel in such a manner that a portion of the dressing roller will retain its original diameter.
  • Another object is to provide means whereby a dressing roller can be rotated either continuously or incrementally.
  • FIG. 1 is a partial plan view in section.
  • FIG. 2 is a partial end view in section.
  • FIG. 3 is a diagrammatic sketch of a dresser mechanisrn.
  • FIG. 4 is a partial end elevation showing the relation between the dressing roller and the grinding wheel.
  • FIG. 5 is a pneumatic and electric circuit.
  • FIG. 6 shows the change in point of contact between the dressing roller and the grinding wheel as the dressing roller passes around the corners of the grinding wheel.
  • FIG. 7 shows the dressing roller with a portion cut away to show the nature of the contact between a new dressing roller and the grinding wheel.
  • FIG. 8 shows the inclined relation between the dressing roller and the face of the grinding wheel.
  • FIG. 9 is a plan view in section on line 9-9 of FIG. 2, showing the toothed collar and locking plunger for preventing rotation of the dressing roller during a dressing operation.
  • base member 10 is mounted on the grinding wheel support (not shown).
  • Carriage 11 is mounted for movement on base member 10 parallel to the axis of grinding wheel 15.
  • Hydraulic motor 14 provides said movement.
  • Dresser slide 12 is mounted on carriage 11 for movement transversely of carriage 11 toward and from grinding wheel 15. Slide 12 may be adjusted toward and from grinding Wheel 15 by means of hand wheel 49 and a feed screw (not shown).
  • Dressing roller 20 is rotatably mounted on shaft 21 in housing 22 and has abrasive cutting particles uniformly distributed in a matrix on its peripheral surface.
  • Dressing roller 29 is arranged to be held in fixed angular position during a dressing operation as will be described in detail later.
  • Housing 22 is attached by means of adaptor 23 to dresser bar 24 in slide 12.
  • the axis of shaft 21 is inclined slightly to the axis of bar 24 so that the operative face of roller 29 is correspondingly inclined relative to the face of grinding wheel 15.
  • Roller 29 is guided around the corners and across the face of grinding wheel 15 by pattern 30 and roller follower 31 which is the same diameter as roller 20. As roller 29 wears, the entire width of its face is gradually presented to grinding wheel 15 so that there is always a portion of roller 20 which retains the original diameter. This is the same diameter as follower 31. Because this portion of roller 26 is the same diameter as follower 31, the radius dressed on the wheel corners is not afiected by the change in diameter of part of roller 20 due to wear. When roller 2i) becomes worn to the point that its maximum diameter is less than that of follower 31, it is replaced by a new diamond roller.
  • Pattern 30 and follower 31 are held in operative relation by hydraulic motor 32 which also co-acts with motor 14 to provide the inward component of the traverse movement as roller 20 moves around the wheel corners.
  • Motor 32 may also be used to continue the inward movement of the dresser beyond the completion of the corners, in order to dress the sides of grinding wheel which grind the side walls of a crankpin. The extent of this movement may be determined as shown in US. Patent 3,121,423, by a limit switch 2LS and suitable control means shown more in detail in said patent.
  • Shaft 21 is rotatably supported in bearings 50 in housing 22.
  • a second housing 25 mounted on housing 22 encloses the index mechanism.
  • a driving motor 55 which is connected to shaft 21 through a suitable clutch 58, a disconnectable coupling 56 and shaft 57 which is, in effect, a part of shaft 21.
  • One means for indexing the dressing roller consists of a one-way clutch 60 on shaft 57 having an index arm 61 attached to rotor 62.
  • Rotor 62 is arranged to drive through balls 63 to shafts 57 and 21 and roller 26.
  • Arm 61 is attached to a piston 65 having head portions 66 and 67.
  • the means for holding dressing roller 20 in fixed angular position consists of a toothed collar 68 on shaft 21 which co-acts with a locking plunger 69 having a double tooth 70 to more precisely engage, center and lock collar 68 and roller 20 in indexed position.
  • plunger 69 engages the teeth 71 of collar 68 under the pressure of spring 72 which does not interfere with indexing.
  • collar 68 and dress ing roller 20 are locked against rotation by fluid under pressure acting on plunger 69. If the index movement is slightly more or less than the nominal increment, the plunger teeth engaging the teeth on collar 68 Will shift said collar 68 to the proper position.
  • roller 20 When desired, roller 20 may be rotated continuously by motor 55 as disclosed in US. Patent 3,121,423. Oneway clutch 60 will not interfere with such continuous rotation. Locking plunger 69 may be retracted for continuous rotation by any suitable device.
  • the dressing operation is initiated by pressing push button switch P1313 to complete a circuit through normally closed relay contact 92CR2 and normally closed traverse reverse limit switch LS to energize relay 93CR.
  • Relay contact 93CR2 closes to hold relay 93CR and also to complete a circuit through normally closed relay contact 92CR3 and normally closed relay contact 102CR1 to energize diamond index relay 94CR.
  • Relay contact 94CR1 in parallel with normally closed relay contact 92CR3 closes to hold relay 94CR.
  • Relay contacts 94CR2 and 94CR3 complete a circuit to energize index solenoid 25, shifting valve 75 to the right and directing fluid under pressure to the right hand portion 67 of piston 65, shifting said piston to the left and moving index arm 61, rotor 62 and dresser shaft '57 in a counter-clockwise direction.
  • index mechanism closes index limit switch 26LS, completing a circuit to energize relay 92CR.
  • Relay contact 92CR1 closes to complete a circuit fr9 m relay contact 93CR1 to hold relay 92CR.
  • relay 94CR is held through relay contact 94CR1 which is in parallel with normally closed relay contact 92CR3.
  • Relay contact 92CR4 closes in a circuit with previously closed relay Contact 93CR3, to energize traverse right relay 102CR.
  • Normally closed relay contact 102CR1 opens to deenergize diamond index relay 94CR.
  • Relay contact 94CR2 opens to deenergize index sole noid 25.
  • Valve is returned to the left by spring 76 to reset piston 65 and apply pressure through line 64 to locking plunger 69 to lock collar 68 and roller 20 against rotation during a dressing operation.
  • Relay contact 102CR3 completes a circuit to energize traverse right solenoid 26, shifting reversing valve to the right and directing fluid under pressure to the left end of hydraulic motor 14 to shift carriage 11 to the right.
  • traverse reverse limit switch 25LS is opened to deenergize relay QSCR.
  • Index limit switch 26LS is opened, but relay 92CR remains energized by a holding circuit through the dresser traverse start limit switch 24LS and relay contact 92CR1.
  • Relay contact 93CR3 opens to deenergize traverse right relay 192CR.
  • relay contact 93CR4 closes to complete a circuit from relay contact 92CR4 to energize traverse left relay 103CR.
  • Relay contact 103111 closes to energize traverse left solenoid 27, shifting reversing valve 85 to the left and directing fluid to the right hand end of hydraulic motor 14 to shift carriage 11 to the left.
  • limit switch 24LS is opened to deenergize relay 92CR.
  • Relay contact 92CR4 opens in the circuit to traverse left relay 103CR.
  • Relay contact 103CR1 opens to deenergize traverse left solenoid 27.
  • Reversing valve 85 returns to central position.
  • roller 20 As the cutting particles 30 of roller 20 pass across the face of grinding wheel 15, point A of the roller engages grinding wheel 15 andperforms the dressing operation. As roller 29 moves around the left hand corner of grinding wheel 15, the point of contact of roller 20 changes from point A at the beginning of the corner dressing, through a distance of to point B at the end of the corner dressing operation.
  • point A again dresses the face of the grinding wheel 15.
  • roller 20 starts around the right hand corner, the point of contact shifts 90 from point A to point C.
  • dressing roller 20 is indexed, in this case 6, before each dressing operation, the portion of the roller performing the dressing operation either on the face or on the corners, is continuously changing. Distribution of the corner dressing operation over 90 of the dressing roller 20 along with the fact that the tool is inclined insures that a portion of the roller will always have a radius the same as follower 31 and assures accuracy and superior finish in the fillets or radii of the workpiece.
  • Means for dressing a grinding wheel comprising (a) a dressing roller mounted for rotation in a plane normal to the plane of said grinding Wheel with its peripheral face inclined so that initial engagement of said roller with the peripheral face of said grinding wheel is on one edge of said roller,
  • Means for dressing a grinding wheel having rounded corners comprising a) a dressing roller mounted for rotation in a plane normal to the plane of said grinding wheel and having a plurality of rows of uniformly distributed cutting particles on its peripheral surface,
  • (g) means to locate and hold said roller in a fixed angular position including an index device for turning said roller to another fixed angular position to present different combinations of cutting particles to said grinding wheel,
  • control means operable in response to said means for turning said roller, for initiating the longitudinal movement of said carriage.
  • Means for dressing a grinding wheel comprising (a) a dressing roller mounted for rotation in a plane normal to the plane of said grinding wheel With its peripheral face inclined so that initial engagement of said roller with the peripheral face of said grinding Wheel is on one edge of said roller,
  • Means for dressing a grinding wheel comprising (a) a dressing roller mounted for rotation in a plane normal to the plane of said grinding wheel and having a plurality of rows of cutting particles on its peripheral face with its peripheral face inclined so that initial engagement of the roller with the peripheral face of said grinding wheel is on one edge of said roller,
  • a dressing roller mounted for rotation in a plane normal to the plane of said grinding Wheel with its peripheral face inclined so that initial engagement of said roller with the peripheral face of said grinding wheel is on one edge of said roller
  • Means for dressing a grinding wheel having rounded corners comprising (a) a dressing roller mounted for rotation in a plane normal to the plane of said grinding wheel and having a plurality of rows of cutting particles on its peripheral face, with its peripheral face inclined so that initial engagement of said roller with the peripheral face of said grinding wheel is on one edge of said roller,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US362677A 1964-04-27 1964-04-27 Impregnated indexing roller for grinding wheel dressers Expired - Lifetime US3313285A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US362677A US3313285A (en) 1964-04-27 1964-04-27 Impregnated indexing roller for grinding wheel dressers
SE4062/65A SE319402B (de) 1964-04-27 1965-03-30
DEL50510A DE1289449B (de) 1964-04-27 1965-04-20 Abrichtvorrichtung fuer Schleifscheiben
GB17157/65A GB1038435A (en) 1964-04-27 1965-04-23 Indexing means for grinding wheel dressers
CH571165A CH436012A (fr) 1964-04-27 1965-04-23 Dispositif de dressage d'une meule
NL6505302A NL6505302A (de) 1964-04-27 1965-04-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US362677A US3313285A (en) 1964-04-27 1964-04-27 Impregnated indexing roller for grinding wheel dressers

Publications (1)

Publication Number Publication Date
US3313285A true US3313285A (en) 1967-04-11

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ID=23427078

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US362677A Expired - Lifetime US3313285A (en) 1964-04-27 1964-04-27 Impregnated indexing roller for grinding wheel dressers

Country Status (6)

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US (1) US3313285A (de)
CH (1) CH436012A (de)
DE (1) DE1289449B (de)
GB (1) GB1038435A (de)
NL (1) NL6505302A (de)
SE (1) SE319402B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491741A (en) * 1967-12-26 1970-01-27 Litton Industries Inc Profile dressing mechanism for grinding wheels
US3584616A (en) * 1968-08-08 1971-06-15 Landis Tool Co Truing mechanism for grinding wheels
US4103668A (en) * 1976-07-30 1978-08-01 Toyoda-Koki Kabushiki-Kaisha Dressing apparatus for grinding wheel
US4196611A (en) * 1978-05-22 1980-04-08 Shigeru Suga Testing apparatus for determining abrasion resistance of a surface
US4274388A (en) * 1979-10-15 1981-06-23 The Warner & Swasey Company Method and apparatus for dressing grinding wheels
EP0169971A1 (de) * 1984-07-17 1986-02-05 Luciano Barbisan Universalschleifmaschine für Massenfertigung
DE102008004848A1 (de) * 2008-01-17 2009-07-23 Vollmer Werke Maschinenfabrik Gmbh Vorrichtung und Verfahren zum Abrichten einer Bearbeitungsscheibe mittels eines rotierenden Abrichtwerkzeugs sowie Werkzeugmaschine mit einer derartigen Vorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3598534B2 (ja) * 1994-04-28 2004-12-08 豊田工機株式会社 非球面加工装置
JP6717106B2 (ja) * 2016-08-08 2020-07-01 株式会社ジェイテクト ツルーイング装置及びツルーイング方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2380451A (en) * 1943-04-19 1945-07-31 Koebel Diamond Tool Company Disk diamond dressing tool
US2507756A (en) * 1945-07-13 1950-05-16 Valentine Lab Inc Mechanical movement with constantly or intermittently driven member
US2752909A (en) * 1953-01-12 1956-07-03 Curran Lawrence Diamond tool holder
US2933078A (en) * 1958-05-22 1960-04-19 Wheel Trueing Tool Co Continuous diamond infeed and grinding wheel dresser
US3121423A (en) * 1960-06-03 1964-02-18 Landis Tool Co Profile dressing device for grinding wheels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644442A (en) * 1950-07-14 1953-07-07 Jr Joseph Loecy Diamond tool assembly
US2741239A (en) * 1953-09-22 1956-04-10 Donald D Dixon Rotary diamond tool
DE1792522U (de) * 1957-12-18 1959-07-23 Franco Fenocchio Diamant-werkzeug zum abrichten von schleifscheiben.
FR1290719A (fr) * 1961-06-01 1962-04-13 Landis Tool Co Machine à dresser le profil des meules

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2380451A (en) * 1943-04-19 1945-07-31 Koebel Diamond Tool Company Disk diamond dressing tool
US2507756A (en) * 1945-07-13 1950-05-16 Valentine Lab Inc Mechanical movement with constantly or intermittently driven member
US2752909A (en) * 1953-01-12 1956-07-03 Curran Lawrence Diamond tool holder
US2933078A (en) * 1958-05-22 1960-04-19 Wheel Trueing Tool Co Continuous diamond infeed and grinding wheel dresser
US3121423A (en) * 1960-06-03 1964-02-18 Landis Tool Co Profile dressing device for grinding wheels

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491741A (en) * 1967-12-26 1970-01-27 Litton Industries Inc Profile dressing mechanism for grinding wheels
US3584616A (en) * 1968-08-08 1971-06-15 Landis Tool Co Truing mechanism for grinding wheels
US4103668A (en) * 1976-07-30 1978-08-01 Toyoda-Koki Kabushiki-Kaisha Dressing apparatus for grinding wheel
US4196611A (en) * 1978-05-22 1980-04-08 Shigeru Suga Testing apparatus for determining abrasion resistance of a surface
US4274388A (en) * 1979-10-15 1981-06-23 The Warner & Swasey Company Method and apparatus for dressing grinding wheels
EP0169971A1 (de) * 1984-07-17 1986-02-05 Luciano Barbisan Universalschleifmaschine für Massenfertigung
DE102008004848A1 (de) * 2008-01-17 2009-07-23 Vollmer Werke Maschinenfabrik Gmbh Vorrichtung und Verfahren zum Abrichten einer Bearbeitungsscheibe mittels eines rotierenden Abrichtwerkzeugs sowie Werkzeugmaschine mit einer derartigen Vorrichtung
US20090203296A1 (en) * 2008-01-17 2009-08-13 Vollmer Werke Maschinenfabrik Gmbh Device and method for truing a machining wheel by means of a rotating truing tool as well as machine tool with a device of this kind

Also Published As

Publication number Publication date
NL6505302A (de) 1965-10-28
GB1038435A (en) 1966-08-10
DE1289449B (de) 1969-02-13
CH436012A (fr) 1967-05-15
SE319402B (de) 1970-01-12

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