US3903654A - Grinding machine in which the force applied to a guide template is advantageously reduced - Google Patents

Grinding machine in which the force applied to a guide template is advantageously reduced Download PDF

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Publication number
US3903654A
US3903654A US515715A US51571574A US3903654A US 3903654 A US3903654 A US 3903654A US 515715 A US515715 A US 515715A US 51571574 A US51571574 A US 51571574A US 3903654 A US3903654 A US 3903654A
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US
United States
Prior art keywords
follower
template
work piece
grinding machine
pressure
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Expired - Lifetime
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US515715A
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English (en)
Inventor
Kunihisa Hayashi
Yoshihiro Tadera
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.)
Mazda Motor Corp
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Toyo Kogyo Co Ltd
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Filing date
Publication date
Application filed by Toyo Kogyo Co Ltd filed Critical Toyo Kogyo Co Ltd
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Publication of US3903654A publication Critical patent/US3903654A/en
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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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/09—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding trochoidal surfaces, e.g. in rotor housings of Wankel engines
    • B24B19/095—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding trochoidal surfaces, e.g. in rotor housings of Wankel engines using templates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/10—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only
    • B23Q35/101—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool
    • B23Q35/102—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of one line
    • B23Q35/103—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of one line which turns continuously
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/09—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding trochoidal surfaces, e.g. in rotor housings of Wankel engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S451/00—Abrading
    • Y10S451/919—Wankel

Definitions

  • ABSTRACT A grinding machine for abrading a trochoidal form surface of a work-piece which includes a male template secured to the under surface of a work piece operating table which is adapted to move to create a tr0- choidal form, and follower means for transmitting motion corresponding to a cam face of the template to a follower table through rotary arms. 1n rough grinding, the follower means can be disengaged from the template for high speed abrasion. while in finishing grinding following the cam face of the template, the force applied to the template is advantageously reduced for prolonged life of the template and high working efficiency.
  • the present invention relates to a grinding machine 5 and more particularly, to a grinding machine for abrading a trochoidal form surface of a work piece.
  • the surface of the work piece is abraded by an abrasive wheel adapted to make a noncircular motion by a non-circular form creating motion mechanism which draws a curve similar to that of the surface to be worked of the work piece or by a template having a similar contour to that of the surface to be worked.
  • such a template is generally of a female template having a contour similar to that of the surface to be worked.
  • the female template of the above described kind has such disadvantages that it is not only difficult to manufacture or repair, but, particularly in grinding the trochoidal form surface, an extremely large pressure is applied to the template by follower means at the projecting portions on the short axis of the two-lobed trochoidal form in the template, resulting in earlier wearing out of the template.
  • the large force required to press the abrasive wheel against the surface of the work piece to be worked during grinding operation is adapted to be directly applied to the template through the follower means, which arrangement extremely shortens the life of the template.
  • the conventional grinding machines of the above described type are of construction wherein the template is secured on a work piece operating table through a housing, the distance between the head stock and the template is inevitably short, which arrangement requires a large size of the grinding machine itself for installing in-process gauges, autoJoader etc., and besides, the template housing attached on the work piece operating table imparts a larger inertia to the operating table during rotation, thus adversely affecting the high speed operation.
  • an essential object of the present invention is to provide a grinding machine for abrading a trochoidal form surface of a work piece by a combination of a trochoidal form creation mechanism and a template in which a force to be applied to the template is largely reduced with substantial elimination of the disadvantages inherent in the conventional grinding machines.
  • Another important object of the present invention is to provide a grinding machine of the above described type in which the template is secured to the under surface of a work piece operating table for easy installation of other necessary devices and for efficient grinding operation.
  • a further object of the present invention is to provide a grinding machine of the above described type in which a male template having a cam face at the outer periphery thereof is employed for prolonged life and easy repairing of the template.
  • a still further object of the present invention is to provide a grinding machine of the above described type in which a rough grinding of the surface to be worked only by the trochoidal form creation mechanism, and a finishing grinding of the same by the combination of the trochoidal form creation mechanism and the follower means are readily effected by a single operation with improved accuracy and high working efficiency.
  • the work piece secured to the work piece operating table is adapted to move so as to create a trochoidal form with the direction for cutting-in of the abrasive wheel kept constant, so that the trochoidal curve is formed at the point of abrasion with a normal line for the trochoidal form kept positionally stable and with the abrasive wheel adapted to cut into the surface to be worked along a fixed line.
  • a male template having a cam face thereof corresponding to a female trochoidal form surface to be worked is secured to the under surface of the work piece operating table which is adapted to create a trochoidal form, with the movement of a follower corresponding to the cam face of the template being transmitted to a follower table through rotary arm means provided on a main body of the grinding machine so that disadvantages inherent in the conventional grinding machines are advantageously eliminated.
  • the follower table can be readily disengaged from the follower means without operating the rotary arms for high speed abrasion.
  • hydraulic means for applying a first pressure to one end of the rotary arm means in a direction to urge said follower to the cam face of the template, and another hydraulic means for applying a second pressure in a direction opposite to that of the first pressure so as to slide the head stock toward the same end of the rotary arm means are provided, so that the follower is urged against the cam face of the tamplate at a pressure equal to the first pressure minus the second pressure, by which arrangement the life of the template is advantageously prolonged with improved grinding efficiency.
  • FIG. 1 is a side elevational view, partly in section, of a grinding machine according to the present invention
  • P10. 2 is a sectional view, on an enlarged scale, taken along the line 11-" of FIG. 1,
  • FIG. 3 is a sectional view showing, on an enlarged scale, an important portion of follower means and cut- 3 ting-in means employed in the grinding machine of FIG. 1, and
  • FIG. 4 is a schematic view explanatory of a trochoidal form creation mechanism employed in the grinding machine of FIG. 1.
  • FIG. 1 For general understanding of the grinding machine of the invention, reference is made to FIG. 1 for brief description of the construction thereof.
  • the grinding machine of the invention generally comprises a main body 2 having a flat surface on the upper portion thereof on which a work piece operating table 4 for securing a work piece 1 thereon is slidably disposed, a template 5, for example, a male template secured to the under surface of the table 4, a mechanism 3 disposed in the body 2 below the table 4 for imparting the table 4 a trochoidal form creation motion, a sliding member 7 slidably disposed adjacent to the template 5, a follower 6 fixed at one end of the member 7 adjacent to a cam face a of the template 5, two rotary arms 9 and pivotally mounted on a follower column 8 extending upward at right angles from the leftward surface of the body 2, which rotary arms are each disposed at the lower portion and the upper portion of the follower table on' the axes parallel to each other with the upper end of the arm 9 and the lower end of the arm 10 adapted to engage with or disengage from each other so that when the lower arm 9 is rotated clockwise, the upper arm 10 is rotated counter clockwise
  • the spindle 23 to the lower end of which an abrasive wheel 24 is fixed is rotatably received in a wheel head 25 which is in turn slidably received for lateral movement thereof in the head stock 22 by guide means mentioned later and is connected for rotation through a belt 29 to a motor 28 slidably mounted, for example, by guide means on the lift table 16 for upward or downward movement.
  • the lift table is movable upward or downward with the head stock 22 having the spindle 23, the follower table 20, the cutting-in device 17, and the motor 28 disposed thereon, whereas on the lift table 16 the cutting device 17 remains stationary while the follower table 20, the head stock 22 and the motor 28 are only laterally movable and that the abrasive wheel spindle 23 supported in the head stock 22 is movable upward or downward by a predetermined distance besides the lateral movement thereof together with the head stock 22.
  • the sliding member 7, the rotary arms 9 and 10, the follower table 20 and the head stock 22 are on the same plane normal to the flat horizontal surface of the main body 2, so that the movement of the sliding member corresponding to the cam face 50 of the template 5 can be transmitted through the follower 6 and the rotary arms 9 and 10 to the follower table 20, and that the abrasive stone 24 is cut into a surface 10 of the work piece I in a direction parallel to the movement of the sliding member 7.
  • FIGS. 1 through 3 there is shown the grinding machine G of the invention for grinding the work piece 1 having a two-lobed trochoidal surface la to be worked, in which grinding machine G the work piece operating table 4 which is associated with the trochoid creating motion mechanism 3 mentioned later is slidably, horizontally disposed on the horizontal upper surface of the main body 2 of the grinding machine G for moving the work piece 1 to form a two-lobed trochoidal curve.
  • the male template 5 having, on the outer periphery 50 thereof, a corrected two-lobed trochoidal curve formed by revising, for actual use, the above two-lobed trochoidal curve to be drawn by the mechanism 3.
  • the sliding member 7 On the upper surface of the main body 2, there is also slidably disposed the sliding member 7 which moves on a normal line for the trochoidal form mentioned later, and which has the follower 6, at one end 7b thereof, adjacent to the template 5 with the follower 6 adapted to contact and follow the outer periphery or cam face 50 of the template 5.
  • the follower column 8 To the follower column 8 upwardly extending at right angles from the surface of the main body 2 at the left portion of the body 2 in FIG.
  • the lower rotary arm 9 and the upper rotary arm 10 are pivotally connected by corresponding pins [la and llb with one end of each of the arms 9 and 10 adapted to engage each other and with the other lower end of the arm 9 facing the end 7c of the sliding member 7, so that when the lower arm 9 is rotated clockwise, the upper arm'10 is rotated counter clockwise.
  • the other upper end 10a of the rotary arm 10 is located between a piston 12a for a template depressing cylinder 12 fixed to the follower column 8 and the follower table 20 mentioned later for pressing the end of the arm 10 against the follower table 20 upon actuation of the piston 12a and simultaneously for pressing the end 9a of the rotary arm 9 against the end 70 of the sliding member 7 so as to move the member 7 toward right in FIG. 1 along the normal line and to urge the follower 6 of the member 7 against the cam face 5a of the template 5.
  • the follower 6 moves along the cam face 5a of the template 5 with the sliding member 7 moved along the normal line for the trochoidal form so as to push the lower end 9a of the arm 9 and to turn the arm 9 clockwise which in turn rotates the arm 10 counterclockwise, and thus, motion corresponding to the cam face 5a of the template 5 due to the rotation is transmitted to the follower table 20.
  • a piston rod extending from a cylinder 13 fixed to the main body 2 at a position above the sliding member 7 is adapted to depress, upon actuation of the cylinder 13, a projection 7a extending upwardly at right angles from the end 7c of the member 7 for spacing the member 7 and consequently the follower 6 away from the template 5.
  • a lift table 16 is slidably mounted on head stock guides 14 provided at the back of the body 2 for vertically moving a head stock 22 and is adapted to move upward or downward by the actuation of a piston rod (not shown) of a cylinder 15.
  • the lift table 16 is provided with cutting-in means 17 with the follower table 20 and the head stock 22 also slidably mounted on the table 16 so as to be laterally movable through, for example, guide means (not shown).
  • the cutting-in means 17 is adapted to move the head stock 22 leftward toward the follower table 20 in FIG. 1 for bringing the abrasive wheel 24 into contact with the surface 1a to be worked of the work piece 1, and that for urging the abrasive wheel 24 against the surface In to be worked, both the head stock 22 and the follower table 20 are simultaneously moved leftward in FIG. 1 by a follower device 37 mentioned later.
  • an abrasive wheel spindle driving motor 28 for rotating the abrasive wheel spindle 23 through a belt 29 is mounted through, for example, guide means (not shown) provided apart from the guides 14 so as to be slidably, laterally movable in association with the head stock 22 so that the spindle 23 is always driven irrespective of the movement of the former.
  • a rotary shaft 170 fixed to an operating handle 18 (FIG. 1) is connected to one end of an operating shaft 30 through a reduction mechanism 19 which includes bevel gears 19a and 19b engaging each other.
  • a rotating member 33 having, at one end thereof, a threaded portion 330 (FIG, 3) which threadedly engages a bore 21 formed in the follower table 20 is supported by bearings 32.
  • a bore 34 is centrally formed at the other end of the member 33, in which bore 34 a retaining member 35 is received and fixed therein by a key 36 and a cap plate 36.
  • the retaining member 35 is centrally formed with a bore 350 which extends through the member 35, into which bore 350 the other end of the operating shaft 30 is slidably received through ball means (not shown), but is prevented from rotation within the member 35 by a spline 31 provided on the shaft 30 to form the so called ball and spline engagement therebetween.
  • rotating member 33 and the operating shaft 30 are coaxial and directed in a direction parallel to the normal line of the trochoidal form.
  • the rotating member 33 is rotated to a slight degree with the threaded end 33a thereof threaded into the bore 21 and consequently with the head stock 22 shifted toward the follower table 20 through, for example, guide means (not shown) for the abrasive wheel 24 to be cut into the surface 1a of the work piece 1. it is needless to say that the head stock 22 is spaced away from the follower table 20 upon rotation of the handle 18 in the opposite direction to the above.
  • the follower device 37 comprises a follower cylinder 38 secured to the lift table 16 and a piston 39 received in the cylinder 38 with a piston rod 39a of the piston 39 fixed to a corresponding portion of the head stock 22 to urge the head stock 22 leftward when the cylinder 38 is actuated as mentioned below.
  • a follower cylinder 41 for trochoidal form creation is disposed in a direction parallel to the sliding member 7 at the lower part of the follower table 20 adjacent to the upper end 10a of the arm 10.
  • the work piece 1 can be abraded only for the creation of the trochoidal form without following the template 5.
  • An inprocess gauge 43 is provided in a position suitable for the measurement of the surface of the work piece 1 being worked.
  • the cylinder 41' is for limiting the leftward movement of the follower table 20 so that the surface In of the work piece 1 is abraded only to form the trochoidal form, while the cylinder 41 is for establishing engagement between the follower table 20 and the upper rotary arm 10 for abrading the surface In following the template while the work piece 1 is rotated to create the trochoidal form.
  • the mechanism 3 disposed in the lower part of the main body 2 below the work piece operating table 4 includes a driving shaft 44 which comprises an upper portion 45 integrally formed with a lower portion 45' thereof with the axis of the upper portion 45 deviated from the axis of the lower portion 45' by a distance e and which is rotatably supported in a direction parallel to the abrasive wheel spindle 23 by a bearing 470 at the upper portion 45 and by a bearing 47b at the lower por tion 45 respectively, a pinion 46 fixedly mounted on the shaft 44 on the upper portion 45 thereof between the bearings 47a and 47b, and a boxlike connecting member 49 rotatably mounted at an approximately central portion thereof, on the upper portion 45 of the shaft 44 through an upper bearing 48:: and a lower bearing 48b.
  • a shaft 51 extending in a direction parallel to the axes of the shaft 44 and having a pinion 50, which engages the pinion 46 of the shaft 44, fixedly mounted thereon is rotatably supported by the member 49 through an upper bearing 51a and a lower bearing 51b with the upper end of the shaft 51 secured to the lower central portion of the work piece operating table 4, while in the inner portion of the member 49 at the left of the shaft 44, a pinion 53 is fixedly mounted on a shaft 54 extending in a direction parallel to the axes of the shaft 44 and rotatably supported by the member 49 by an upper bearing 55a and a lower bearing 55b, which pinion 53 engages the pinion 46 through an intermediate gear 56.
  • a connecting plate 57 is fixedly mounted on the upper end of the shaft 54 which extends through the member 49, while a pin 58 is rotatably mounted, through a bearing 57', in the plate 57 at a position deviated from the axis of the shaft 54 by a predetermined distance, the upper end of which pin 58 extending through the plate 57 is rotatably connected to a sliding member 60 slidably received in a groove 59 formed in the main body 2 in a direction parallel to the sliding member '7.
  • the work piece 1 being rotated by the gear 50 forms a two-lobed trochoidal curve above the driving shaft 44 of the pinion 46 which is rotating at an angular velocity two times as large as that of the work piece 1. Accordingly, if the cutting-in feeding of the abrasive wheel 24 into the surface la of the work piece 1 is made on a line connecting an engaging point A between the pinion 46 and the gear 50, and the axis B (creating point of a trochoidal form) of the lower portion 45' of the driving shaft 44, which line is, in other words, a normal line N for the trochoidal form, the surface of the work piece 1 can be geometrically, accurately worked into the trochoidal form.
  • the groove 59 is formed in the body 2 on the normal line N connecting the engaging point A between the gear 50 and the pinion 46, and the axis B of the lower portion 45 of the shaft 44, while the gear 50, the pinion 46, the intermediate gear 56 and the pinion 53 are rotatably supported in the connecting member 49 as described earlier with the upper end of the shaft 54 for the pinion 53 secured to the connecting plate 57 and with the connecting plate 57 in turn rotatably connected, at one end thereof through the pin 58, to the sliding member 60 slidably received in the groove 59 so that points A, B and C, and the points A, D and E in FIG. 4 fomi a similar triangle to each other.
  • the work piece 1 secured to the work piece operating table 4 is adapted to form the trochoidal curve above the driving shaft 44 by forming the groove 59 in the direction of the normal line N, the surface la of the work piece 1 can be accurately worked for trochoidal form by causing the abrasive wheel 24 to cut into the surface la to be worked.
  • the work piece 1 is secured on the work piece operating table 4 with the piston rod 12a for the depressing cylinder 12 extended to a predetermined degree so as to move the sliding member 7 rightward in FIG. 1 for contacting the follower 6 with the cam face 5a of the template 5, after which the pressure fluid is introduced into the chamber 400 in the cylinder 38 for moving the follower table 20 and the head stock 22 toward the left in the drawing. Since the pressing force Pb by the cylinder 38 is smaller than the pressing force Pa by the template depressing cylinder 12, the follower 6 is urged against the cam face 50 of the template 5 at a pressure P Pa Pb.
  • the abrasive wheel 24 abrades the surface 1a to be worked along the entire width of the surface la for very accurate abrasion of the work piece 1, since the follower table 20 is limited in its movement by the rotary arm 10.
  • the above described abrasion based on the template may be required only in finishing the surface la, so that in rough abrading, the cylinder 13 is operated with the piston rod 130 thereof engaging the projection 7a of the sliding member 7 and with the piston rod 12a of the depressing cylinder 12 retracted for spacing the follower 6 away from the cam face 50 of the template 5 and simultaneously for moving the upper end 100 of the rotary arm away from the follower table 20.
  • the follower cylinder 38 is operated as described earlier with the piston rod 42 of the creating operation cylinder 41' extended, the follower table is independent of the template 5, so that the surface la of the work piece 1 can be ground with the abrasive wheel 24 rotated by the driving motor (not shown) running at high speed. It is needless to say that the abrasive wheel 24 can be cut into the surface la to be worked in the same manner as that described earlier.
  • the template is adapted to be secured to the under surface of the work operating table, the upper surface is free from any obstacle, by which arrangement auto-loading devices, in-process gauges, etc. can be readily attached.
  • the cam face is formed on the outer periphery of the template for correspondingly moving the follower table through the rotary arms, the short axis of the trochoidal from coincides with the concave portion of the trochoidal form with consequent less pressure applied thereto by the follower, and the cam face is readily repaired when worn out.
  • the engagement between the template and the follower can be released by operating the cylinder for trochoidal form creation with the piston rod of the template depressing cylinder retracted and with the cylinder for spacing the follower away from the template operated, which arrangement is effective for high speed grinding with the wearing out of the template advantageously prevented, resulting in improved productivity in the grinding operation.
  • the force Pb for pressing the abrasive wheel against the work piece is not directly applied to the template through the follower in finishing grinding, but is applied in the direction to move the follower away from the template.
  • the above force Pb is adapted to be smaller than the pressing force Pa by the depressing cylinder. Accordingly, the force P for pressing the follower against the template is equal to Pa minus Pb,'by which the force applied to the template is reduced to a great extent with remarkably prolonged life of the template.
  • a grinding machine for abrading a trochoidal form surface of a work piece which comprises a work piece operating table slidably mounted, for securing a work piece thereon, on a surface of a main body of said grinding machine, said work piece operating table being adapted to move so as to form a trochoidal curve on a normal line for said trochoidal curve, a template having a cam face thereof corresponding to said trochoidal form and secured to said work piece operating table at a side of the latter opposite to that on which said work piece is secured, a follower member which is in sliding contact with said cam face of said template and which is slidable to a direction of movement of an abrasive wheel, rotary arm means whose one end is as sociated with said follower member so as to urge said follower member to said cam face or to space said follower member away from said cam face, means for applying a first pressure to the other end of said rotary arm means in a direction to urge said follower member to said cam face of said cam face
  • said rotary arm means comprises an upper rotary arm and an lower rotary arm pivotally mounted on a main body of said grinding machine with one end of each of said arms engaging each other so that when said lower arm is rotated clockwise, said upper arm is rotated counterclockwise.
  • said rotary arm means comprises a plurality of rotary arms pivotally connected to said main body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Machine Tool Copy Controls (AREA)
US515715A 1973-10-23 1974-10-17 Grinding machine in which the force applied to a guide template is advantageously reduced Expired - Lifetime US3903654A (en)

Applications Claiming Priority (1)

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JP11960173A JPS542943B2 (enrdf_load_html_response) 1973-10-23 1973-10-23

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US3903654A true US3903654A (en) 1975-09-09

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US515715A Expired - Lifetime US3903654A (en) 1973-10-23 1974-10-17 Grinding machine in which the force applied to a guide template is advantageously reduced

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JP (1) JPS542943B2 (enrdf_load_html_response)
DE (1) DE2450378C3 (enrdf_load_html_response)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750345A (en) * 1972-03-06 1973-08-07 Babcock & Wilcox Co Machine tool
US3800621A (en) * 1971-07-20 1974-04-02 Tri Ordinate Corp Cam control grinding machine
US3813818A (en) * 1972-10-12 1974-06-04 Toyo Kogyo Co Profile grinder
US3828481A (en) * 1973-05-23 1974-08-13 Cincinnati Milacron Heald Cam controlled machine for grinding a non-circular surface

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522516B2 (enrdf_load_html_response) * 1971-12-06 1977-01-21

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800621A (en) * 1971-07-20 1974-04-02 Tri Ordinate Corp Cam control grinding machine
US3750345A (en) * 1972-03-06 1973-08-07 Babcock & Wilcox Co Machine tool
US3813818A (en) * 1972-10-12 1974-06-04 Toyo Kogyo Co Profile grinder
US3828481A (en) * 1973-05-23 1974-08-13 Cincinnati Milacron Heald Cam controlled machine for grinding a non-circular surface

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JPS542943B2 (enrdf_load_html_response) 1979-02-15
DE2450378C3 (de) 1979-09-20
DE2450378A1 (de) 1975-04-24
JPS5069675A (enrdf_load_html_response) 1975-06-10
DE2450378B2 (de) 1979-01-11

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