US3914854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for securing an abrasive wheel tool to a spindle of a wheel head
Assignee: Mazda Motor Corp
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Filing: 1973-12-20
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Granted: 1975-10-28
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Expires: 1993-12-20
Abstract
Abstract This invention relates to a method for press-fitting an abrasive wheel tool having a cylindrical tubular bushing made of a light metal and bonded to the inner surface of a bore of a cylindrical tubular abrasive wheel onto a spindle of a wheel head so as to make the burnishing connection between them, thereby improving the securing accuracy of the abrasive wheel tool. The abrasive wheel tool is exchangable merely by drawing it after it is wore up, because of the fact that the automatic exchanging operation of the abrasive wheel tool is easily achieved.
Inventors
- 👤 Takanori Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:04
CPC Classifications
B; B24; B24B; B24B45/00; B24B45/003; B23; B23Q; B23Q3/00; B23Q3/155; B23Q3/1552; B23Q3/15553; B23Q3/157; B23Q3/15713; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49945; Y10T403/00; Y10T403/49; Y10T403/4966; Y10T403/70; Y10T403/7047; Y10T483/00; Y10T483/17; Y10T483/1733; Y10T483/1736; Y10T483/174
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
328 words
In an internal grinding machine including an abrasive wheel tool having a cylindrical tubular abrasive wheel and a cylindrical tubular bushing securely fixed to the bore of said abrasive wheel, a wheel head and a cylindrical spindle extending along an axis from said wheel head, the improvement wherein: said cylindrical spindle includes a leading end connecting portion having a diameter slightly larger than the internal diameter of said tubular bushing and wherein said abrasive wheel tool is detachably secured fixedly to said spindle by being press-fitted onto said end portion with the leading edge of cylindrical spindle end portion cutting into said bushing and expanding the bushing to form a burnishing connection due to the interference fit formed therebetween, and wherein said grinding machine further comprises means for removing and discarding the abrasive wheel tool mounted on said spindle and means for placing a new abrasive wheel tool on said spindle by the relative movement of the wheel with respect to said wheel head spindle along said axis, said abrasive wheel tool removing and discarding means comprising a U-shaped member being supported on a base movable parallel to said spindle, said wheel tool being mounted on said member and being movable transversely with respect to said spindle, said member having right angle wall portions on opposite sides of said wheel tool with one of said wall portions being slotted to permit said spindle to extend therethrough from said wheel head and a press pin carried by said other wall and extending outwardly therefrom towards said spindle and said wheel tool and axially aligned therewith, and means for reciprocating said U-shaped member in one direction along said axis to cause said slotted wall to press on one end of said wheel tool to remove said wheel tool axially from said spindle, and movable in the other direction along said axis to cause said press pin to press a new wheel tool onto the end portion of said cylindrical spindle.
Claim 2
Dependent Claim
328 words
In an internal grinding machine including an abrasive wheel tool having a cylindrical tubular abrasive wheel and a cylindrical tubular bushing securely fixed to the bore of said abrasive wheel, a wheel head and a cylindrical spindle extending along an axis from said wheel head, the improvement wherein: said cylindrical spindle includes a leading end connecting portion having a diameter slightly larger than the internal diameter of said tubular bushing and wherein said abrasive wheel tool is detachably secured fixedly to said spindle by being press-fitted onto said end portion with the leading edge of cylindrical spindle end portion cutting into said bushing and expanding the bushing to form a burnishing connection due to the interference fit formed therebetween, and wherein said grinding machine further comprises means for removing and discarding the abrasive wheel tool mounted on said spindle and means for placing a new abrasive wheel tool on said spindle by the relative movement of the wheel with respect to said wheel head spindle along said axis, said abrasive wheel tool removing and discarding means comprising a U-shaped member being supported on a base movable parallel to said spindle, said wheel tool being mounted on said member and being movable transversely with respect to said spindle, said member having right angle wall portions on opposite sides of said wheel tool with one of said wall portions being slotted to permit said spindle to extend therethrough from said wheel head and a press pin carried by said other wall and extending outwardly therefrom towards said spindle and said wheel tool and axially aligned therewith, and means for reciprocating said U-shaped member in one direction along said axis to cause said slotted wall to press on one end of said wheel tool to remove said wheel tool axially from said spindle, and movable in the other direction along said axis to cause said press pin to press a new wheel tool onto the end portion of said cylindrical spindle.
Claim 3
Dependent Claim
26 words
The internal grinding machine according to claim 1, wherein said cylindrical tubular bushing is made of a material such as a soft metal and a plastic.
Claim 4
Dependent Claim
30 words
The internal grinding machine according to claim 1, wherein said cylindrical spindle is formed with spline-shaped longitudinal grooves for enhancing the firm engagement of said bushing with said cylindrical spindle.
Claim 5
Dependent Claim
30 words
The internal grinding machine according to claim 1, wherein said cylindrical spindle is formed with broach-like annular grooves for enhancing the firm engagement of said bushing with said cylindrical spindle.
Claim 6
Dependent Claim
64 words
The internal grinding machine according to claim 1, wherein said cylindrical tubular bushing has projecting portions extending axially from the respective ends of the abrasive wheel for engaging a push-pull tool of the grinding machine so as not to destroy the abrasive wheel per se when the abrasive wheel tool is press-fitted onto or withdrawn from said spindle by the operation of said tool.
Claim 7
Dependent Claim
47 words
The internal grinding machine according to claim 5, wherein one of said projecting portions of said bushing is in the form of a flange extending radially from one end of said abrasive wheel and having the outer diameter smaller than that of said abrasive wheel per se.
Claim 8
Dependent Claim
62 words
The internal grinding machine according to claim 1, wherein the inner peripheral surface of said cylindrical tubular bushing is formed in a taper in which the inner diameter of one end portion thereof corresponding to the tip portion of said spindle when said spindle is press-fitted into said bushing is smaller than the outer diameter of said tip portion of said spindle.
Claim 9
Dependent Claim
24 words
The internal grinding machine according to claim 1, wherein said cylindrical tubular bushing has stepped inner diameter portions and said spindle is correspondingly stepped.
Claim 10
Dependent Claim
37 words
The internal grinding machine according to claim 8, wherein said cylindrical spindle comprises a forward reduced diameter portion and a rearward enlarged diameter portion and said bushing comprises correspondingly forward reduced and rearward enlarged internal diameter portions.
Claim 11
Dependent Claim
47 words
The internal grinding machine according to claim 1, further comprising clamp means for chucking said spindle while said U-shaped member operates to remove an abrasive wheel tool from said spindle and place a new one thereon, and wherein said clamp means is carried by said U-shaped member.
Claim 12
Dependent Claim
35 words
The internal grinding machine according to claim 10, wherein said abrasive wheel tool removing and discarding means is elastically mounted to said internal grinding machine to take up play of the components forming the same.
Claim 13
Dependent Claim
69 words
The internal grinding machine according to claim 10, wherein a pressurized oil hydraulically operated cylinder and a piston movable therein, is operatively coupled to said U-shaped member, and said piston is provided with spring means for retracting said piston a small distance from a given position thereof when actuated by the pressurized oil, when the pressure of the oil is released said press pin being mounted on said piston.
Claim 14
Dependent Claim
46 words
The internal grinding machine according to claim 1, further comprising an abrasive wheel tool supplying means for storing therein a plurality of abrasive wheel tools and means for supplying one by one, said abrasive wheel tools onto said spindle when the abrasive wheel tool is exchanged.
Claim 15
Dependent Claim
81 words
The internal grinding machine according to claim 13, wherein said abrasive wheel tool supplying means is in the form of a disc and is provided with a plurality of holes arranged radially of said disc each adapted to hold respectively one of the plurality of said abrasive wheel tools and a spring for each hole for urging the abrasive wheel tool therein to the side of said hole so as to prevent the inadvertent removal of an abrasive wheel tool therefrom.
Claim 16
Dependent Claim
72 words
The internal grinding machine according to claim 14, wherein said abrasive wheel tool supplying means comprises a disc in the form of a doughnut provided with said plurality of holes for holding the abrasive wheel tools, another disc of a smaller diameter located in the space defined by the inner diameter of said doughnut-shaped disc and second spring means for elastically connecting said doughnut-shaped disc to said disc of the smaller diameter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |