US2774197A - Means for feeding a grinding wheel of aperipheral grinding attachment into a workpiece - Google Patents

Means for feeding a grinding wheel of aperipheral grinding attachment into a workpiece Download PDF

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Publication number
US2774197A
US2774197A US448653A US44865354A US2774197A US 2774197 A US2774197 A US 2774197A US 448653 A US448653 A US 448653A US 44865354 A US44865354 A US 44865354A US 2774197 A US2774197 A US 2774197A
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United States
Prior art keywords
grinding
grinding wheel
workpiece
slide
feeding
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Expired - Lifetime
Application number
US448653A
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English (en)
Inventor
Bretscher Otto
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.)
Von Roll AG
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Von Roll AG
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Filing date
Publication date
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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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • B24B47/04—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by mechanical gearing only

Definitions

  • the present invention aims at eliminating this drawback in order to enable the grinding wheel to be smoothly fed in and the grinding to be slowed down, as well as to achieve an extremely accurate and clean ground surface.
  • the procedure according to the invention consists in the fact that the grinding wheel is fed in a circular arc into the work piece in such a way that, the travel of the grinding wheel axis being uniform, the feed travel of the grinding wheel is, in accordance with the sine function, reduced to zero and the nominal dimension attained in this zero position.
  • This procedure is carried out with the aid of an attachment which is characterized by the fact that on a horizontally adjustable slide there is suspended after the fashion of a pendulum a swivel member on which is arranged a vertically adjustable grinding wheel bean'ng, the grinding wheel spindle of which is mounted parallel to the suspension arbor, means to move the swivel member being provided, and that furthermore articulated or flexibly attached to the swivel member is an arm, on the end of which a compound slide rest with a diamond dresser is secured, which in its operative position is shiftable in the plane including both said spindle and said arbor.
  • Fig. 1 is a cross-section taken along the line l-I in Fig. 2 and through the grinding attachment constructed in accordance with the present invention.
  • Fig. 2 is a front view of said grinding attachment
  • Fig. 3 is a side view of the swivel plate and grinding wheel slide employed in said attachment
  • Fig. 4 is a section along line IV-IV in Fig. 2,
  • Fig. 5 is a section along line VV in Fig. 2,
  • Fig. 6 shows an alternative embodiment of the compound slide rest to which the diamond dresser is secured
  • Fig. 7 shows still another alternative embodiment of the compound slide rest.
  • rotation of the spindle traverses the slide 2 across the support-1.
  • two lugs 4 Secured to the slide 2 are two lugs 4 in which the swivel plate 5 is supported.
  • the swivel plate 5 is formed by the arms 5a, which are interconnected by transverse connecting members 5b and 5c, 5d, and is swivelly supported in the lugs 4 by means of the bolts 6.
  • transverse connecting member 5b guides or guide tracks are provided in which a slide 7 is moved up and down.
  • This slide 7 carries the bearing plate 9 of the grinding motor 10, which plate is likewise shiftable and adjustable relative to the slide 7 with the aid of the screw 8.
  • the grinding motor 10 drives via the V belt 12 the V belt pulley 13 which is supported on the arbor 14. The latter is mounted in the bearing 15 and carries on its other end the grinding wheel 16.
  • the bearing 15 is so secured to the bottom end of the slide 7 that the arbor of the grinding wheel can reach a position vertically below the axis of the swivel or pivot bolts 6 on which the swivel plate 5 is mounted.
  • the handwheel 17 arranged on the shaft 18 which is guided in the stirrup 18a, the threaded spindle 20 is turned via the pair of bevel gears 19.
  • the spindle 20 engages the threaded nut 22 of the slide 7 so that said slide, together with the motor 10 and the grinding wheel 16 can be vertically adjusted.
  • the spindles 18 and 20 are mounted in the cross piece or transverse member 5d.
  • Swivelly secured to the left arm 5:: of the swivel plate 5 by means of the bolt 24 is furthermore an arm 26,'to which is attached the grinding wheel dresser constituted by the compound slide rest A and the diamond 28.
  • the compound rest A with the diamond 28 is in the way during grinding, it can be swivelled by means of a small motor 29 via the wire rope or cable 30 into the position indicated by broken lines in Fig. 1.
  • a small motor 29 to which one end of the rope or cable is connected to a drum 30a, while the other end is connected to a plate 30b mounted on the bolt or axle 24, whereby the plate 30b is fixedly connected to the arm 26.
  • the cable is either wound onto or unwound from the drum 39a so as to move the arm and the dresser either to the broken line position or to the full line position, respectively, shown in Fig. 1.
  • the dial gauge micrometer 32 on the compound rest A serves to measure the height at which the diamond or other dressing element should be set.
  • the compound rest A must be clamped in the grinding position by means of a locking screw 33.
  • Mounted in the slide 2 is a spindle 34, by means of which the threaded spindle 37 is rotated via the bevel gears 35 and 36.
  • the threaded spindle 37 engages the threaded nut 37a, which is fiexibly or resiliently articulated to the swivel plate 5, whereby the swivel pla-te 5 and thus the grinding wheel may be swung out of the vertical plane into the dotted position S and vice versa.
  • the spindle 34 is connected via a reduction gear 38 to the motor 39 which effects the automatic feeding-in of the grinding wheel toward the workpiece 50.
  • a hand-operated drive 40 (Fig. 2) also enables the grinding wheel 16 to be fed in and Withdrawn manually.
  • the vertical position of the swivel plate 5 is the Zero position.
  • the grinding wheel spindle axis is located in the same vertical plane as the swivel axis of the plate 5, i. e., it is located vertically below the axis of swivel 0 constituted by the bolts 6 and thus is in its lowest position.
  • the diamond when dressing the grinding wheel, moves in the plane E formed by the two t I V 3 axes. This plane swings'out of the zero position angle a.
  • the feed-in motor 39 is controlled by a switch 42, which has twocontacts 43 and 44. 'l'he switch-42 is actuated by a stop 45 which is secured on'the' swivel plate so that it moves along with the grinding wheel 16. Connected to the circuit, which is first closed by the switch 42, is a signal lamp 46 which shines red for instance, while a green lamp 47 is switched in by means of the contact 44.
  • the workpiece, 50 is clamped to the worktable 51, and arranged beside the latter is the template 52 which is vertically adjustable,
  • the compound rest A1 which is swivelly mounted on the pivot 55 and can be locked at a predetermined position.
  • the diamonds 57 and 58 are arranged at right angles to one another and are shiftable in the already mentioned plane E.
  • the arrows show the paths along which the diamonds 57 and 58 can be moved.
  • the wheel 16a When'one'of the diamonds is shifted in the direction of arrows 6i and 61, the wheel 16a will be dressed at an'angle of 45, and when the other diamond respectively, are connected via belts 63, 64, and 65' with each other and with a non-rotating screw 66 on wh ch is arranged a worm gear 67 shaped as a threaded nut.
  • the gear 67 can be rotated via a worm 68'.
  • a grinding wheel can be dressed horizontally as shown in Figs. 1 and 2.
  • a small motor 68 (Fig. 6) maybe provided for connection to the worm'68 to move the slides of the compound rest.
  • the workpiece G is clamped to the grinding table 51.
  • the template 51 is arranged beside the said workpiece.
  • the heightof the template is set at the finished dimension of the. workpiece.
  • the diamond dresser 23 is brought, with t.e-aid' of suitable adjustment'rneans, to the template height as read on the dial micrometer 32, whereupon the grinding wheel 16. is dressed with the diamond in the manner already described.
  • the grinding wheel is now accurately set at the template height,'i. e. at thefinished dimension of the workpiece.
  • the stop 45 closes the contact 43 so that the red lamp 46 lights up, indicating that the grinding wheel has practically completed its work.
  • the operator now checks whether the grinding wheel needs to bedressed for the last turn. If this is so, he swivels the compound rest A into. the dressing position and trues the wheel '16,-it being possible for him to feed the grinding wheel into the diamond dresser .28 by means of the handwheel 17. Then, the compound rest A is raised onceagain and the grinding process continued until the green lamp lights up and the feed-in motor is switched ofi.
  • dresser means for trueing said grinding wheelja first arm swingably attached at one end thereof to'said supporting means for movement a'bout a second axis, and rest means attached to the other end of said arm and carrying said dresser means, said first and second axes being disposed in said supporting means and in a common plane with the axis of rotationof said grinding wheel.
  • said onedial micrometer being; positioned. on said secondarrn at a predetermined distance from said third axis; whereby.
  • said one dial micrometer may be swung over said dresser meansfl f. y
  • said rest means comprising a triangular block, pivot means on said first arm and supporting said block for rotation about an axis substantially perpendicular to said axis of rotation of said grinding wheel, said block being provided with a peripheral guide track, and a pair of slides movably arranged in said guide track, said dresser means comprising a pair of diamonds mounted in said slides, respectively.
  • said belt means being substantially coincident with and covering those portions of said guide track not occupied by said slides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US448653A 1953-08-11 1954-08-09 Means for feeding a grinding wheel of aperipheral grinding attachment into a workpiece Expired - Lifetime US2774197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH320847X 1953-08-11

Publications (1)

Publication Number Publication Date
US2774197A true US2774197A (en) 1956-12-18

Family

ID=32601926

Family Applications (1)

Application Number Title Priority Date Filing Date
US448653A Expired - Lifetime US2774197A (en) 1953-08-11 1954-08-09 Means for feeding a grinding wheel of aperipheral grinding attachment into a workpiece

Country Status (4)

Country Link
US (1) US2774197A (enrdf_load_stackoverflow)
BE (1) BE531029A (enrdf_load_stackoverflow)
CH (1) CH320847A (enrdf_load_stackoverflow)
FR (1) FR1106412A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262649A (en) * 1979-12-17 1981-04-21 Fidel Espinosa Sine bi-angle wheel dresser
AU6226190A (en) * 1989-09-13 1991-03-21 Ah Kow Hew Boiled egg maker
CN108581840B (zh) * 2018-06-19 2023-10-20 天津大学 一种用于圆弧轨迹进给的摆动调心结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US269915A (en) * 1883-01-02 Grinding finishing machine plates
US1104988A (en) * 1913-05-26 1914-07-28 Pratt & Whitney Co Metal-reducing machine.
US1899654A (en) * 1931-08-31 1933-02-28 Gear Grinding Mach Co Worm grinding machine
US2028315A (en) * 1932-04-20 1936-01-21 Bruhl Paul Grinding machine
US2130021A (en) * 1937-04-12 1938-09-13 Neugart Franz Grinding machine
US2633674A (en) * 1949-09-05 1953-04-07 Fouquet Eugene Machine for cutting files

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US269915A (en) * 1883-01-02 Grinding finishing machine plates
US1104988A (en) * 1913-05-26 1914-07-28 Pratt & Whitney Co Metal-reducing machine.
US1899654A (en) * 1931-08-31 1933-02-28 Gear Grinding Mach Co Worm grinding machine
US2028315A (en) * 1932-04-20 1936-01-21 Bruhl Paul Grinding machine
US2130021A (en) * 1937-04-12 1938-09-13 Neugart Franz Grinding machine
US2633674A (en) * 1949-09-05 1953-04-07 Fouquet Eugene Machine for cutting files

Also Published As

Publication number Publication date
CH320847A (de) 1957-04-15
FR1106412A (fr) 1955-12-19
BE531029A (enrdf_load_stackoverflow)

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