US3813818A - Profile grinder - Google Patents
Profile grinder Download PDFInfo
- Publication number
- US3813818A US3813818A US00297122A US29712272A US3813818A US 3813818 A US3813818 A US 3813818A US 00297122 A US00297122 A US 00297122A US 29712272 A US29712272 A US 29712272A US 3813818 A US3813818 A US 3813818A
- Authority
- US
- United States
- Prior art keywords
- template
- follower means
- spindle
- abrasion
- follower
- 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
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- PROFILE GRINDER Inventors: Kunihisa Hayashi; Norihiro F ujimoto, both of Hiroshima, Japan Assignee: Toyo Kogyo Company Limited,
- This invention relates to profile grinders incorporating a follower means and, more particularly, to an improved profile grinder including an abrasive grinding wheel adapted to move laterally for controlling the amount of depth of abrasion while keeping the abrasive wheel and a work piece in a predetermined relation defined by the cam face of a template.
- the amount or depth of abrasion can not be controlled with the follower means fixed in a predetermined contact relation with respect to the template. Accordingly, the desired control of the amount of abrasion is preferably provided by raising or lowering a cylindrical tapered follower means along the spindle of the abrasive wheel extending coaxially with the follower means.
- Such arrangement generally requires an abrasive wheel having a spindle with an undesirable large axial dimension and a relatively small diameter because of the presence of the tapered portion of the follower means, and threaded members or other reciprocating means for raising or lowering the follower means on the spindle.
- the exact diameter of the spindle will vary depending upon the size of the template being used.
- the abrasive wheel spindle provides poor regidity and hence poor precision in the gringing operation.
- a template having 'a cam face substantially contoured similar to the desired non-circular surface is employed with a follower means carried by a suitable carrier or holding means in a spaced apart relation with respect to the abrasive wheel spindle.
- the direction of the force tending to urge the follower means against the template is not in alignment or coicident with the direction of abrasion which is essential for achieving precision in the abrading operation.
- Either arrangment provides unfavorable effects, such as requiring a large and complex mechanism at the operating section of the mechaine or consideration reduction in the rigidity of the abrasive wheel spindle and consequent impairment of precision in the grinder operation.
- the present invetion is directed toward the objective of overcoming the above-mentioned problems of the prior art profile grinders and provides an improved profile grinder which includes a simplified operating mechanism while assuring precision in the grinding operatlon.
- Another object of the present invention is to provide a profile grinder in which an abrasive grinding wheel is adapted to move laterally for controlling the depth of abrasion independently of a follower means maintained in a predetermined contact relation to a template, wherein improved precision and efficiency of the grinding operation is possible.
- a further object of the present invention is to provide a profile grinder in which an abrasive grinding wheel is adapted to move laterally for controlling the depth of abrasion independently of a follower means maintained in a predetermined contact relation to the template and the center of the abrasive wheel is maintained in alignment with the point of abrasion along a line normally extending through the point of contact of the follower means on the template to provide a more precise and efficient grinding operation.
- Astill further object of the present invention is to provide a profile grinder in which a line normally extending through the point of contact of a follower means on a template coincides with the direction of the force tending to urge the follower means against the template.
- FIG. I is a front view, partially in longitudinal cross section, of a preferred embodiment of the profile grinder in accordance with the present invention.
- FIG. 2 is a transverse cross section taken along line Il-II of FIG. 1.
- a work piece W has a non-circular surface Wa, such as a trochoid surface of the rotor housing of a rotary piston engine, which is to be abraded and finished by an abrasive grinding wheel 1.
- the abrasive wheel 1 is rigidly mounted on a spindle 2 which, in turn, is mounted on a wheel head 3 for rotation and traverse motion imparted by a suitable rotating and traversing means, not shown,
- a table 4 supports a template 6 secured to the top of the table by a suitable connecting means, such as template supprt 5.
- the work piece W is supported and located on a work piece support 7 below the template 6.
- the position of the work piece W with respect to the table 4 is controlled by a tool, not shown, such that the non-circular face Wa of the work piece W to be abraded substantially corresponds to the similar noncircular vertically extending cam face 6a of the template 6.
- the table 4 is adapted to rotate by a suitable actuating and drive mechanism, not shown, so as to generate the desired non-circular curved motion between the surface Wa of the work piece W and the point of abrasion by the abrasive wheel ll.
- Riding and sliding on the vertically extending cam face 6a of the template 6 is a follower roller 8 having a curved and bulging outline configuration with a relatively large radius of curvature R.
- the follower roller may have a plain cylindrical shape.
- the follower roller 8 is supported and located by retainer member 9 such that the center A of the follower roller 8 is on a line D extending through the point of abrasion B taking place on the work piece by the action of the abrasive wheel 1 and through the center C of the abrasive wheel ll.
- the retainer member 9 is mounted and disposed around the abrasive wheel spindle 2 with sufficient clearance to permit the desired control of the amount of the depth of abrasion obtained by the abrasive wheel 1.
- the wheel head 3 is carried by a carriage 10 which is slidable on an auxiliary base plate ill for movement along the line D extending through the point of abrasion B toward the center C of the abrasive wheel.
- a driven gear 12 for feeding the carriage lift is integrally connected to a feed screw 13 which is threaded through a retainer portion Ml of the auxiliary base plate ll.
- a vertically movable plate 116 shown in FIG. 2, is provided for supporting the carriage W by the interposition of the auxiliary base plate ll which is mounted on the plate 16 in such a way as to permit sliding motion in the direction of the abrasion control as in a manner similar to the carriage it with respect to the auxiliary base plate ll.
- the auxiliary base plate ii is connected to a piston rod l8 extending from a power cylinder 17 mounted on the plate to and adapted to provide pressure to urge the follower roller 8 against the cam face 6a of the template ti.
- a pressurized fluid such as compressed air or oil
- the auxiliary base plate ill with the carriage l0 mounted thereon is rapidly moved toward the left as seen in FIG. 2, causing the follower roller 8 supported by the ratainer member 9 and a support means 19 on the auxiliary base plate ill to move along the line D so as to be urged against the cam face 6a of the template 6.
- indexing of the abrasive wheel 1 mounted on the carriage 10 is achieved so as to bring the abrasive wheel near the working area Wu and the point of abrasion contact B with the work piece W along the line D.
- a power cylinder 20 is provided for retaining and securing the plate to in the desired vertical position.
- a piston rod 21 is moved rightward, causing concave sliding elements 23a and 23b inserted in the plate 16 to engage and grip complementary convex rails 25a and 25b integrally connected to a machine base 24, thereby fixing the plate 16 in the desired operative position with respect to the machine base 24.
- a suitable lift means is provided to move the plate 16 in the vertical direction such that the abrasive wheel l and the follower roller 8 are placed in contact with the surface N0 of the Work piece W to be abraded and the cam face 6a of the template 6, respectively, whereupon the power cylinder 20 is then operated to retain the plate 16 in such desired operative position for performing the grinding operation on the work piece W by the abrasive wheel 1.
- the power cylinder 17 is operated to move the auxiliary base plate 11 toward the left, thereby urging the follower roller 8 against the template 6, and thereafter, the feed screw i3 is rotated to advance the abrasive wheel 1 in the lateral direction so as to obtain the desired depth of abrasion.
- Abrasion is achieved by rotation and vertical traverse motion of the abrasive wheel 1, in conjunction with the contour motion of the work piece on the table 4 so as to machine the non-circular surface Wa of the work piece W into desired size and shape.
- the line extending from the point of contact E of the follower roller 8 sliding on the cam face 6a of the template 6 to the center A of the follower roller 8 is maintained in alignment with the line D extending from the point of abrasion B taking place on the surface Wa of the work piece W by the action of the abrasive wheel 1 to the center C of the abrasive wheel 1, as well as the normal line extending through the point of abrasion B on the surface Wa of the work piece W which continuously moves by the contour motion of the table 4.
- Such alignment is effective to provide great precision in the finished product.
- the power cylinder 17 is operated to move the auxiliary base plate lill toward the right in FIG. 2, causing the follower roller 8 and the abrasive wheel 1 to move away from the cam face 6a of the template 6 and the surface Wa of the work piece W, respectively.
- the power cylinder 20 is operated to release the pressure or restraining force imparted from the concave sliding members 23a and 23b to the convex rails 25a and 25b on the machine base 24, thereby permitting the movable plate 16 with the auxiliary base plate 11 and the carriage it) to be lifted by the lift means described hereinabove.
- the same motion may be provided by moving the abrasive wheel l with respect to the fixed work piece by a suitable actuating mechanism (not shown) mounted on the wheel head 3.
- actuating mechanisms may be incorporated into the table 4 and the wheel head 3 so as to combine the movement of the table 4 with the motion of the wheel head 3 to generate the desired non-circular relative motion between the work piece W and the abrasive wheel 1.
- the follower roller 8 may be pressed against the template 6 by any suitable pressure means, other than the power cylinder 17, such as a counter weight.
- follower means has been shown and described as being a follower roller, it should be noted that other follower configurations, such as a bracket having a plain sliding surface which follows the cam face of the template, may also be employed.
- the follower means following the vertical cam face 60 of the template 6 on the table on which the work piece W is mounted is fixed and maintained stationary at a point along the axial length of the abrasive wheel spindle 2 on the wheel head 3 during the grinding operation, thus simplifying the manufacture with great precision of the template having a non-circular cam face and the follower means having a relatively short axial length. Furthermore, a higher precision abrading operation is possible with an abrasive wheel having a relatively short and thick spindle 2 having sufficient rigidity.
- the spindle 2 can be moved to provide control of the depth of abrasion without danger of interference with the follower means, thus facilitating abrasion of a variety of sizes or work pieces W, as well as enabling the use of an abrasive wheel having a substantially large effective diameter.
- a profile grinder comprising:
- a spindle mounting said abrasive wheel for effecting abrasion on a work piece
- a template having a cam face and being fixed in a predetermined position on a table supporting said work piece
- follower means adapted to slide on said cam face of 6 said template for guiding said abrasive wheel to a desired working point, first pressure means for resiliently urging said follower means against said cam face of said template,
- control means for moving said abrasive wheel relative to said follower means in the abrading direction for controlling the amount of abrasion while maintaining said follower means in a predetermined position in resilient contact with said cam face of said template
- said follower means, said spindle and said control means being mounted on a wheel head, said wheel head being connected to a machine base by second pressure means, said follower means on said wheel head being urged against said cam face by the action of said first pressure means, to effectively control the depth of abrasion, said follower means, said pressure means, said spindle and said control means being positioned such that the direction of the force tending to urge said follower means toward said template coincides with the direction of the movement of said spindle with respect to said work piece to effectively control the depth of abrasion,
- said follower means and said spindle further being mounted such that a line extending through the point of contact of said follower means on said cam face of said template is in alignment with the direction of the force tending to urge said follower means against said template, and
- said follower means being in the form of a cylindrical ring having said spindle extending therethrough, the inner diameter of said ring being larger than the diameter of said spindle so as to provide a sufficient clearance to permit lateral movement of said spindle relative to said follower means for controlling the amount of abrasion.
Landscapes
- 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)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00297122A US3813818A (en) | 1972-10-12 | 1972-10-12 | Profile grinder |
DE2251680A DE2251680C3 (de) | 1972-10-12 | 1972-10-21 | Schleifmaschine zum Bearbeiten hohlzylindrischer Werkstücke |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00297122A US3813818A (en) | 1972-10-12 | 1972-10-12 | Profile grinder |
DE2251680A DE2251680C3 (de) | 1972-10-12 | 1972-10-21 | Schleifmaschine zum Bearbeiten hohlzylindrischer Werkstücke |
Publications (1)
Publication Number | Publication Date |
---|---|
US3813818A true US3813818A (en) | 1974-06-04 |
Family
ID=25763983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00297122A Expired - Lifetime US3813818A (en) | 1972-10-12 | 1972-10-12 | Profile grinder |
Country Status (2)
Country | Link |
---|---|
US (1) | US3813818A (de) |
DE (1) | DE2251680C3 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3903654A (en) * | 1973-10-23 | 1975-09-09 | Toyo Kogyo Co | Grinding machine in which the force applied to a guide template is advantageously reduced |
US3922792A (en) * | 1973-02-21 | 1975-12-02 | Toyoda Machine Works Ltd | Gauging apparatus for workpiece with trochoidal cross section |
US4854080A (en) * | 1987-09-17 | 1989-08-08 | Mikrona, Ag | Apparatus for sharpening periodontal instruments |
US4911043A (en) * | 1987-10-26 | 1990-03-27 | Compression Technologies, Inc. | Apparatus and method for milling a trochoidal rotor |
US5274963A (en) * | 1991-03-11 | 1994-01-04 | Moshav Shitu Fi Regba | Flush-mount sink assembly method |
US5609512A (en) * | 1995-01-09 | 1997-03-11 | Kraft Foods, Inc. | Method and apparatus for off-line honing of slicer blades |
US20080064307A1 (en) * | 2006-09-07 | 2008-03-13 | Daoyi Qi | Stone edge grinding machine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2225251B3 (de) * | 1973-04-11 | 1977-02-11 | Cincinnati Milacron Heald |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2334938A (en) * | 1943-03-29 | 1943-11-23 | Entpr Engine & Foundry Company | Cam grinding machine |
US3663188A (en) * | 1971-07-20 | 1972-05-16 | Tri Ordinate Corp | Cam control grinding machine |
US3693297A (en) * | 1970-03-24 | 1972-09-26 | Bryant Grinder Corp | Apparatus and method for grinding irregular surfaces of revolution |
US3757474A (en) * | 1971-09-15 | 1973-09-11 | Gleason Works | Curved surface generator |
-
1972
- 1972-10-12 US US00297122A patent/US3813818A/en not_active Expired - Lifetime
- 1972-10-21 DE DE2251680A patent/DE2251680C3/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2334938A (en) * | 1943-03-29 | 1943-11-23 | Entpr Engine & Foundry Company | Cam grinding machine |
US3693297A (en) * | 1970-03-24 | 1972-09-26 | Bryant Grinder Corp | Apparatus and method for grinding irregular surfaces of revolution |
US3663188A (en) * | 1971-07-20 | 1972-05-16 | Tri Ordinate Corp | Cam control grinding machine |
US3757474A (en) * | 1971-09-15 | 1973-09-11 | Gleason Works | Curved surface generator |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3922792A (en) * | 1973-02-21 | 1975-12-02 | Toyoda Machine Works Ltd | Gauging apparatus for workpiece with trochoidal cross section |
US3903654A (en) * | 1973-10-23 | 1975-09-09 | Toyo Kogyo Co | Grinding machine in which the force applied to a guide template is advantageously reduced |
US4854080A (en) * | 1987-09-17 | 1989-08-08 | Mikrona, Ag | Apparatus for sharpening periodontal instruments |
US4911043A (en) * | 1987-10-26 | 1990-03-27 | Compression Technologies, Inc. | Apparatus and method for milling a trochoidal rotor |
US5274963A (en) * | 1991-03-11 | 1994-01-04 | Moshav Shitu Fi Regba | Flush-mount sink assembly method |
US5609512A (en) * | 1995-01-09 | 1997-03-11 | Kraft Foods, Inc. | Method and apparatus for off-line honing of slicer blades |
US20080064307A1 (en) * | 2006-09-07 | 2008-03-13 | Daoyi Qi | Stone edge grinding machine |
Also Published As
Publication number | Publication date |
---|---|
DE2251680B2 (de) | 1978-03-23 |
DE2251680A1 (de) | 1974-05-02 |
DE2251680C3 (de) | 1978-11-23 |
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