Patent US3132239A successfully refreshed from Google Patents.
US3673918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration dampener for a machine tool
Assignee: Kearney and Trecker Corp
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Filing: 1970-05-01
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Granted: 1972-07-04
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Expires: 1990-05-01
Abstract
Abstract This invention comprises means for adding adjustable dampening to a slidable machine tool member, such as a spindle head, that is secured to a supporting frame member by means of anti-friction bearings. The dampening means are particularly adapted to selectively and adjustably compensate for vibration due to the anti-friction support means in such a manner as to increase both the quality and depth of a particular metal cutting operation by overcoming the tendency to vibration.
Inventors
- 👤 Frank Zankl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:57
CPC Classifications
F; F16; F16C; F16C29/00; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/262; B23Q1/40; F16C2322/00; F16C2322/39; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304312
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
282 words
In a machine tool adapted to support a spindle head for selective movement to perform a metal cutting machining operation; a vertical column provided with a plurality of vertical guideways disposed in parallelism; a cutter carrying a spindle head guidably carried by said vertical column guideways for moving a cutter carried thereby to perform a machining operation; a plurality of anti-friction bearings adjustably carried by said spindle head in a manner to urge the anti-friction means presented by each bearing transversely into tight rolling engagement with the respectively associated one of said vertical column guideways; a motorized transmission including rate changing means selectively operative to move said spindle head at a selected feed rate along said column; friction shoes movably carried by said spindle head for lateral movement relative to an associated column guideway, said friction shoes being constrained by said spindle head against axial movement relative to said associated antifriction bearings, said friction shoes being respectively adapted to exert frictional pressure against an associated one of said vertical column guideways; variable actuating means connected to urge said friction shoes to exert a selected degree of frictional pressure against said vertical column guideways; said spindle head being provided with separate tubular openings that each respectively and individually extend transversely to provide an individual opening from said spindle head into an associated one of said column guideways, said tubular guideways being respectively adapted to guidably constrain an associated friction shoe against axial movement relative to an associated one of said antifriction bearings; and resilient means carried at the inner ends of said respective tubular openings being selectively adjusted to resiliently exert the desired frictional pressure of said friction shoes against said associated guideway.
Claim 2
Dependent Claim
282 words
In a machine tool adapted to support a spindle head for selective movement to perform a metal cutting machining operation; a vertical column provided with a plurality of vertical guideways disposed in parallelism; a cutter carrying a spindle head guidably carried by said vertical column guideways for moving a cutter carried thereby to perform a machining operation; a plurality of anti-friction bearings adjustably carried by said spindle head in a manner to urge the anti-friction means presented by each bearing transversely into tight rolling engagement with the respectively associated one of said vertical column guideways; a motorized transmission including rate changing means selectively operative to move said spindle head at a selected feed rate along said column; friction shoes movably carried by said spindle head for lateral movement relative to an associated column guideway, said friction shoes being constrained by said spindle head against axial movement relative to said associated antifriction bearings, said friction shoes being respectively adapted to exert frictional pressure against an associated one of said vertical column guideways; variable actuating means connected to urge said friction shoes to exert a selected degree of frictional pressure against said vertical column guideways; said spindle head being provided with separate tubular openings that each respectively and individually extend transversely to provide an individual opening from said spindle head into an associated one of said column guideways, said tubular guideways being respectively adapted to guidably constrain an associated friction shoe against axial movement relative to an associated one of said antifriction bearings; and resilient means carried at the inner ends of said respective tubular openings being selectively adjusted to resiliently exert the desired frictional pressure of said friction shoes against said associated guideway.
Claim 3
Dependent Claim
246 words
In a machine tool having a column provided with a plurality of vertical guideways disposed in parallelism; a cutter spindle head movably guided by said vertical guideways for vertical movement; anti-friction roller bearings adjustably secured to said spindle head by gibs selectively adjustable between the respective outer side wall of said spindle head and the rearward face of said respectively associated anti-friction bearing in a manner to forcibly urge said anti-friction bearings respectively presented thereby transversely outward into force exerting rolling engagement with said respectively associated vertical column guideways, said bearings being operative to effect anti-friction rolling engagement between said spindle head and said column guideways; friction shoes movably carried by said spindle head in positions to exert relatively slidable frictional pressure against said associated vertical column guideways during relative movement of said spindle head along said guideways; power drive means operative to effect movement of said spindle head along said guideways at a selected feed rate; separate fluid transmitting means connected to selectively actuate each of said friction plugs for forcibly urging said friction shoes to exert frictional pressure against said associated column guideways; a remotely positioned source of pressure fluid operatively connected to transmit fluid under pressure via said fluid transmitting means to each of said friction shoes; and a controller connected to selectively adjust the pressure of fluid from said source via said fluid transmitting means to selectively vary the frictional pressure exerted by said friction plugs against said associated vertical column guideways.
Claim 4
Dependent Claim
246 words
In a machine tool having a column provided with a plurality of vertical guideways disposed in parallelism; a cutter spindle head movably guided by said vertical guideways for vertical movement; anti-friction roller bearings adjustably secured to said spindle head by gibs selectively adjustable between the respective outer side wall of said spindle head and the rearward face of said respectively associated anti-friction bearing in a manner to forcibly urge said anti-friction bearings respectively presented thereby transversely outward into force exerting rolling engagement with said respectively associated vertical column guideways, said bearings being operative to effect anti-friction rolling engagement between said spindle head and said column guideways; friction shoes movably carried by said spindle head in positions to exert relatively slidable frictional pressure against said associated vertical column guideways during relative movement of said spindle head along said guideways; power drive means operative to effect movement of said spindle head along said guideways at a selected feed rate; separate fluid transmitting means connected to selectively actuate each of said friction plugs for forcibly urging said friction shoes to exert frictional pressure against said associated column guideways; a remotely positioned source of pressure fluid operatively connected to transmit fluid under pressure via said fluid transmitting means to each of said friction shoes; and a controller connected to selectively adjust the pressure of fluid from said source via said fluid transmitting means to selectively vary the frictional pressure exerted by said friction plugs against said associated vertical column guideways.
Claim 5
Dependent Claim
250 words
In a machine tool having a column, said column being provided with a plurality of vertical rectilinear guideways disposed in parallelism; a cutter carrying spindle head movably guided by said vertical column guideways for vertical movement therealong; a plurality of anti-friction means carried by said spindle head in a manner to engage an associated one of said vertical guideways of said column to facilitate accurately controlled vertical movement of said spindle head; power operable means in said column selectively operable to effect directionally controlled movement of said spindle head at a predetermined variable rate relative To said supporting column; friction shoes carried by said spindle head in fixed vertically spaced relationship to said antifriction means carried thereby, each of said friction shoes being operative to slidably engage a correspondingly associated vertical guideway presented by said column and being transversely movable relative thereto; hydraulic actuating means selectively operative to urge each of said frictional shoes to exert a predetermined frictional pressure against the respectively associated vertical guideway presented by said column for selectively reducing the amplitude of the oscilatory condition caused by the vibration during power driven metal cutting movement of said spindle head by said power operable means; an adjusting controller selectively operative to effect a pressure actuated adjustment of said hydraulic actuating means to exert a predetermined pressure actuated adjustment of said frictional shoes; and means for adjusting said controller to selectively disconnect the hydraulic actuating means for completely and selectively removing the dampening effect of said frictional shoes.
Claim 6
Dependent Claim
250 words
In a machine tool having a column, said column being provided with a plurality of vertical rectilinear guideways disposed in parallelism; a cutter carrying spindle head movably guided by said vertical column guideways for vertical movement therealong; a plurality of anti-friction means carried by said spindle head in a manner to engage an associated one of said vertical guideways of said column to facilitate accurately controlled vertical movement of said spindle head; power operable means in said column selectively operable to effect directionally controlled movement of said spindle head at a predetermined variable rate relative To said supporting column; friction shoes carried by said spindle head in fixed vertically spaced relationship to said antifriction means carried thereby, each of said friction shoes being operative to slidably engage a correspondingly associated vertical guideway presented by said column and being transversely movable relative thereto; hydraulic actuating means selectively operative to urge each of said frictional shoes to exert a predetermined frictional pressure against the respectively associated vertical guideway presented by said column for selectively reducing the amplitude of the oscilatory condition caused by the vibration during power driven metal cutting movement of said spindle head by said power operable means; an adjusting controller selectively operative to effect a pressure actuated adjustment of said hydraulic actuating means to exert a predetermined pressure actuated adjustment of said frictional shoes; and means for adjusting said controller to selectively disconnect the hydraulic actuating means for completely and selectively removing the dampening effect of said frictional shoes.
Claim 7
Dependent Claim
159 words
In a machine tool provided with a plurality of guideways disposed in parallelism; a cutter spindle head movably guided by said guideways for movement in a specific path of travel; anti-friction bearings secured to said spindle head in position to engage said guideways for rendering said spindle head movable relative to said guideways; means for adjustably urging said antifriction bearings into tight rolling engagement with said associated guideways to effect anti-friction rolling engagement between said spindle head and said guideways; friction shoes movably carried by said spindle head in position to exert frictional pressure against said associated guideways during movement of said spindle head along said guideways to reduce the vibration of said spindle head during such movement; actuating means operatively connected to forcibly urge said friction shoes to exert a selected frictional pressure against said guideways during feeding movement; and power means operative to effect movement of said spindle head along said guideways at a selected feed rate.
Claim 8
Dependent Claim
159 words
In a machine tool provided with a plurality of guideways disposed in parallelism; a cutter spindle head movably guided by said guideways for movement in a specific path of travel; anti-friction bearings secured to said spindle head in position to engage said guideways for rendering said spindle head movable relative to said guideways; means for adjustably urging said antifriction bearings into tight rolling engagement with said associated guideways to effect anti-friction rolling engagement between said spindle head and said guideways; friction shoes movably carried by said spindle head in position to exert frictional pressure against said associated guideways during movement of said spindle head along said guideways to reduce the vibration of said spindle head during such movement; actuating means operatively connected to forcibly urge said friction shoes to exert a selected frictional pressure against said guideways during feeding movement; and power means operative to effect movement of said spindle head along said guideways at a selected feed rate.
Claim 9
Dependent Claim
98 words
In a machine tool according to claim 4 wherein said actuating means for forcibly urging said friction shoes to exert frictional pressure against said associated guideways include separate fluid transmitting means connected to selectively actuate each of said friction shoes; a remotely positioned source of pressure fluid operatively connected to transmit fluid under pressure via said fluid transmitting means to each of said friction shoes; and a controller connected to selectively adjust the pressure fluid from said source via said fluid transmitting means to selectively vary the frictional pressure exerted by said friction shoes against said associated guideways.
Claim 10
Dependent Claim
44 words
In a machine tool according to claim 4 wherein said actuating means comprises resiliently compressible springs operatively connected to effect resiliently biased actuation of said friction shoes to forcibly urge said friction shoes to exert a corresponding resiliently biased frictional pressure against said guideways.
Claim 11
Dependent Claim
42 words
In a machine tool according to claim 6 including, adjusting means individually connected and separately operative to effect selectively compressible adjustment of each of said springs to vary the resilient frictional force exerted by each of said friction shoes against said guideways.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |