US1834831A - Tailstock for lathes and like machinery - Google Patents

Tailstock for lathes and like machinery Download PDF

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Publication number
US1834831A
US1834831A US371663A US37166329A US1834831A US 1834831 A US1834831 A US 1834831A US 371663 A US371663 A US 371663A US 37166329 A US37166329 A US 37166329A US 1834831 A US1834831 A US 1834831A
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United States
Prior art keywords
barrel
tailstock
cylinder
work
lathes
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Expired - Lifetime
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US371663A
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English (en)
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Drummond Arthur
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B23/00—Tailstocks; Centres
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2564—Tailstock

Definitions

  • This invention relates to tailstocks for lathes and like machinery such as grinders and milling machines (hereinafter referred to as lathes) and operating means therefor and is particularly applicable for use with metal working lathes adapted for mass production.
  • lathes the time spent in setting up or removing the work in and from the lathe usually constitutes a small proportion of the time taken in the actualcutting operation which may occupy some hours.
  • the lathe is adapted for mass production wherein, for example, the time taken in executing a similar cutting "operation occupies some minutes only, the time taken up in setting and removing the work such as manipulating the hand wheel of the tailstock and'the locking screw thereof assumes an important factor, and the present invention has for its chief object to reduce such time taken in effecting such necessary but non-productive operations.
  • hydraulic operating means therefor are provided whereby, by the manual operation of, for example, a control cock or cocks, the said barrel is moved under fluid pressure towards or away from the work and as soon as the centre of the barrel and the work are in pressing contact the said barrel is locked a ainst further longitudinal movement in eit er direction by additional hydraulically controlled means.
  • control cock or cocks may be adapted to cause the barrel to be first unlocked and then retracted from the work 7 thereby permitting the latter to be removed 4 from the lathe.
  • the pressure of the working fluid such as oil in order to effect such move ments of the barrel is preferably produced by a pump, carried by the lathe, which may be constantly driven by the main drive of the lathe so' that the tailstock can be operated when the lathe is at rest.
  • a pump carried by the lathe, which may be constantly driven by the main drive of the lathe so' that the tailstock can be operated when the lathe is at rest.
  • the power is trans mitted to the lathe by a belt that, in known manner, is adapted to be moved laterally of the rims of fast and loose pulleys mounted about a common axis, the belt or a portion thereof is maintained in constant engagement with the rim of the loose pulley irrespective of its position relatively to the fast pulley and the said loose pulley is adapted constant ly to drive the pump of the hydraulic system.
  • a permanent leak or passageways may be provided between the suction and pressure sides of the pump so that at all times a portion of the working fluid is able to flow in a constant direction.
  • the leak may be in the form of a by-pass around the relief valve and is preferably provided with a cock or tap for controlling the amount of fluid flowing through it.
  • FIG. 1 is a sectional elevation of one form of tailstock the main body of which is adapted ⁇ )odbe fixed relatively to the lathe or other Figure 2 shows diagrammatically part of hydraulic operating means employed for effecting all the necessary movements of th tailstock, and, p
  • Figure 3 is a'diagrammatic sectional view of a further construction of tailstock.
  • 1 is the tailstock adapted to be fixed to the bed of a lathe and 2 a hollow cylindrical member positioned within the tailstock and capable of being adjusted longitudinally of the latter by means of a rack 3 and a pinion 4 which can be 0 Q forced forward untilthe centre 6 of thel J u r i i i fii' silient pressure ofthe coil spring-lil thereby manually actuated and the member locked in any desired position by a suitable clamping device (not shown).
  • the barrel of the tailstock carrying a centre 6 and positioned concentrically within the member 2 by means of a clutch or clamping device 7 situated at the frontend of the barrel, thatis to say at the end thereof a jacent thework in the lathe, and by a bearing member 8 secured to the rear end of the member 2.
  • the hydraulic operatingmeans whereby thebarrel 5 can be moved relatively to the member 2 includes a cylin'd'er"9' positioned about the barrel 5 and capable of axialmovement within the member 2 and a double-act ingJpiston 10. secured a-medial position to; thebarrel 5 andprovided with cup washers 11;
  • The, cylinder-9 is provided with stuffing-boxes 12 andj13.at;its front andrear ends respectively thestutfing 100x12v being in] screwed ,engagement with, the clutch or.-
  • Thebarrel 5- is, 7 formed withqtwo longitudinal passages 15 which-communicate by means of transverse passagesl6,- t h side flof h p ston 10. and, bymeans of slotsjl? formed in the rear end of the'ba-rr elf5, with further. passages 18 'formed in thebearing-member ,8 and com muni ated wi mu1tiWay.
  • the cock 19 is in .coimnunication' with fluid; pressure, supply pipe 20 and I a release orexhaust pipe 2l'so that either end o-fthef cylinder Scan-be subjectedto the fluid pres,
  • the piston 10 may thus be forced towards either end of the cylinder 9 by actuation of the reversingcock 19 whereby the barrel 5 is moved towards. or awayfrorn the, work in the. lathe.
  • Figure 2,28 is the pump, 'for'e-xample arota-ry gear pump, which supplies the fluid to themain pressure pipe20 ofthe hydraulic p raine mean I Th .bi i ge p e cessive pressure inthesystein isprevented by prov ding a relief valve. 25. which is ar ⁇ ranged to perm t the sretiirn off the working tains. some predetermined value and inIorder a portionoi; the working fluid is ableto flow .in constant .direeti on. v The.
  • Both ends of the cylinder 50 communicate with the reversing cook 47 by pipes 56, 57 so that, when it is desired to disengage the centre 6 from the work, the cock is manually operated causing the pressure end of the cylinder 50 to communicats with the exhaust or release pipe 21 and the other end thereof to communicate with the fluid pressure pipe 20 by the particular formation of passageways in the cock 4?, shown in dotted and dot and dash lines.
  • the piston 5l is thereby moved in the reverse direction causing, in a manner as aforesaid, the locking screw 52 to be again operated to release the barrel for movement by the reverse motionof the piston 40 in the cylinder 1-1- consequent upon the reversal of the coir nectionsof the pipes 45,46 with the pressure in exhaustpipes 20, 21.
  • the cylinders 41 and'50 and their component parts may be conveniently housed within the hollow casting of the tailstock itself and it is preferred to place the actuating handles of the various reversing cocks in such positions that any one of them can be readily actuated by, for example, the arm or elbow of the operator so that both hands of the latter are free to efiectthe setting up or removal of the work, or if desired any one or more of the said actuating handles may be extended downwardly or one or more of the said cocks may be so positioned that actuation thereof can be elfected by the foot of the operator.
  • the hydraulic power produced by the pump 23 may be in excess of that required to actuate the tailstock and to control the rotation of themain driving shaft 31 and such excess power may be utilized in any desired manner, such as for example, in effecting the movements of the cutting tools of the lathe.
  • Mechanism for operating a tailstork for lathes and other machine tools comprising a barrel in said tailstock, manually controlled hydraulically operated means for moving said barrel towards or away from the work in the machine tool, additional hydraulically operated locking means for preventing further longitudinal movement of the barrel in either direction when the said barrel is in pressing contact with the work, a sump containing working fluid, a pump for supplying the working fluid under pressure from the sump to the said hydraulically operated means, a power drive for said machine tool and means associated with the said power drive for constantly driving the said pump;
  • Mechanism for operating a tailstock for lathes and other machine tools comprising a barrel'in said tailstock, manually controlled hydraulically operated means for moving said barrel towards or away from the work in the machine tool, additional hydraulically operated locking means for preventing further longitudinal movement of the barrel in either direction when the said barrel is in pressing contact with the work, a sump containing working fluid, a pump for supplying the working fluid under pressure from the sump to the said hydraulically operated means, a counter-shaft, a fast pulley secured to said counter-shaft, a loose pulley mounted on the shaft adjacent the fast pulley, a power transmission belt constantly in engagement with the said loose pulley and means associated with the said loose pulley for driving the pump.
  • Mechanism for operating a tailstock for lathes and other machine tools comprising a barrel in said tailstock, manually controlled hydraulically operated means for moving said barrel towards or away from the work in the machine tool, additional hydraulically operated locking means for preventing furplying: the working fluid under pressure from.
  • hydraulic-ally operated means for moving said barrel; towards. or. away from the work in;
  • a pump forsupplying the working fluid under pressure from. the. sump. to the said, hydraulically operated means, arelief valve to return the working fluid from the-pumpto the said sump, a coun tor-shaft, a fast pulley secured to said ,coiinter-shaft,,ja loose pulley mounted on, the
  • latlies and other machine tools comprising a barrel in said tallstock, manually controlled hydraulically operated means for movingsaidbarrel towards or away from the work' "1, in themachine tool, additional hydraulically operated locking means. for preventing. fur-.
  • a tailstockiforlathes. and' other. machine tools comprising a memberlongitudinally adjustable; within said ,tailstock, a clamping devicepo'sitioned at thefr-ont end of said member, a bearing element secured to 'the rear enduofsaid member, abarrel sl'idably mounted inusaidclampjing device and said. bearing element, a cylinder positioned about said barrel andsecurcd to, said clamping vdc vice, a piston carried Jbysaid barrel and positioned. within :the gcylinden-aspring in-v serted between the reariendiof the cylinder and'thc said bearing-element and manually controlled means for admitting fluid under pressure to eitherend of the cylinder;
  • a tailst-ock forlathes and othermachine tools comprising a;memberlongitudinally adjustable within said tailstock, i part-conical surface formedat-the frontend of the adjustablemember,a collet adapted to engage saidsurface ancl positioned at the front end of saidmembenxa bearing element secured to the. rear end 'of said member, a barrel slidablymo-unted in Said collet and saidbearing element, a cylinder positioned about said barrel andsecuredto sa'idcollet, a piston carriedby said barrel and positionedwithin the cylinder, spring.
  • tailstoclr for lathes and other machine toolsf comprising; a member longitudinaillyadju-stable within SQLl Cl'ltallStOCk, a clamping device positioned at the front end of said member, a-bearingelemcnt secured "to-the. rearend-of saidmember, a, barrel slidabl'y inounted in said; clamping device and said bearing element, a cylinder positioned abc-u-tsaid barreland securedto said.
  • clamping device a piston carried. bysaid barrel and positioned vwithinj' the cylinder; a. spring inserted between the rear end of the cylinder and the said bearing element, a manually operated reversing cock, a fluid pressure pipe communicating with said cock, an exhaust pipe communicating with said cock and passageways communicating between said cock and both ends of the said cylinder, and manually controlled means for admitting fluid under pressure to either end of the cylinder.
  • a tailstock for lathes and other machine tools comprising a center holder, locking means for locking said centre holder against longitudinal movement, a cylinder the end Walls of which are capable of longitudinal movement, inopposite directions and one of which walls is connected to said holder and the other to means for operating said locking means, yielding means tending to maintain said locking means inoperative, and means for supplying fluid under pressure to said cylinder between said end walls.
  • Atailstock for lathes and other machine tools comprising a centre holder, a cylinder having end walls, a piston located within said cylinder and connected to said holder, locking means for locking said holder against longitudinal movement connected to said cylinder andoperable thereby, yielding means normally to maintain said cylinder from movement in the direction away from the work, and hand controlled means for supplying fluid pressure to said cylinder on either side of said piston.
  • a tailstock for lathes and other machine tools comprising a member longitudinally adjustable within said tailstock, a barrel, a centre carried by said barrel, means for positioning the barrel concentrically within said member consisting of a clamping device positioned at the front end of said member and a bearing element secured to the rear end of said member, manually controlled hydraulically operated means for moving said barrel towards or away from the work in the machine tool and additional hydraulically operated locking means for preventing further longitudinal movement of the barrel in either direction when the centre is in pressing contact with the work the first mentioned hydraulically operated means including a cylinder positioned about the barrel and adapted to be moved within the adjustable member and a double acting piston secured to the barrel and positioned within the cylinder.
  • a tailstock for lathes and other nia chine tools comprising a centre holder. a movable member connected to said holder, locking means for locking said holder against longitudinal movement, a movable member connected to said locking means, a fluid pressure supply arranged for operating both said members, and means to prevent operation of the locking means until the first mentioned member has been moved by the fluid pressure to bring the centre into contact with the work whereafter the fluid pressure operates the second mentioned member to move said locking means into the locking position.
  • a tailstock for lathes and other machine tools comprising a centre holder, a cyl inder, a piston in said cylinder and connected to said holder, locking means for locking said holder against longitudinal movement, a second cylinder, a piston in said second cylinder connected with said locking means, a fluid pressure supply conduit connected with both cylinders, and a pressure operated valve adapted to prevent entrance of fluid pressure to the second cylinder.
  • a tailstock for lathes and other machine tools comprising a centre holder, means to move said holder into contact with the work, means to lock the holder against longitudinal movement when the centre is in contact with the work, and hydraulically operating means which when put in operation act automatically first to unlock said means and then to move said holder away from the work.
  • a tailstoek for lathes and other machine tools comprising a center holder, hydraulically operated means for moving said holder towards the work, locking means for locking said holder against longitudinal movement, a spring normally preventing operation of said locking means, and a hand con trolled device for supplying fluid pressure to both said means.
  • a tailstock for lathes and other machine tools comprising a center holder, hydraulically operating means including a piston device for moving said holder towards the work, other hydraulicaly operated means including a second. piston device for locking the holder against longitudinal movement, yielding means tending to prevent operation of the locking means, and a hand controlled valve for supplying fluid to both said piston devices.
  • a tailstock for lathes and other machine tools comprising a center holder, means to move the holder towards the work, a clamping device for preventing longitudinal movement of the holder, means to operate said device, a spring tending to prevent operation of the clamping device, a hydraulic arrangement for operating both said means including fluid pressure communication between said means, the arrangement being such that the fluid pressure operates between said means first in one direction to actuate the means for moving the holder into engagement with the work whereafter the pressure acts in the opposite direction to overcome the resistance of the spring and operate the locking means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Turning (AREA)
US371663A 1928-08-14 1929-06-17 Tailstock for lathes and like machinery Expired - Lifetime US1834831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23458/28A GB317636A (en) 1928-08-14 1928-08-14 Improvements in or relating to tailstocks for lathes and like machinery

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US1834831A true US1834831A (en) 1931-12-01

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US371663A Expired - Lifetime US1834831A (en) 1928-08-14 1929-06-17 Tailstock for lathes and like machinery

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US (1) US1834831A (fr)
DE (1) DE542853C (fr)
FR (1) FR676893A (fr)
GB (1) GB317636A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494196A (en) * 1945-11-13 1950-01-10 Morey Machinery Co Inc Lathe
US2515681A (en) * 1944-06-21 1950-07-18 Rolfe E Whitaker Turret lathe
US2545858A (en) * 1945-11-13 1951-03-20 Morey Machinery Co Inc Headstock and spindle
US2614447A (en) * 1946-05-18 1952-10-21 Sparks Machine Tool Corp Tailstock
US2910905A (en) * 1954-01-19 1959-11-03 Prec Ind Sa Slidable tailstock
US3053127A (en) * 1958-12-10 1962-09-11 Springfield Machine Tool Compa Powered tailstock
US3160041A (en) * 1961-03-21 1964-12-08 Landis Machine Co Tailstock
CN110064766A (zh) * 2018-01-24 2019-07-30 上海络马机电科技有限公司 一种车床尾座助力滑动装置
CN115635370A (zh) * 2022-03-28 2023-01-24 无锡连强智能装备有限公司 一种便于更换的数控晶体滚圆机用尾架机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963206C (de) * 1954-04-01 1957-05-02 Fritz Werner Ag Reitstock mit selbsttaetig arbeitender Klemmeinrichtung fuer Fraes- und Schleifmaschinen
DE1241230B (de) * 1959-01-20 1967-05-24 Zahnschneidemaschinenfabrik Mo Reitstock fuer Werkzeugmaschinen
DE1169252B (de) * 1959-03-11 1964-04-30 Heyligenstaedt & Co Luenette fuer Werkzeugmaschinen, insbesondere fuer Drehbaenke
CN104972144A (zh) * 2014-04-11 2015-10-14 上海启发电子科技有限公司 一种能够快速拆卸的顶尖轴

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515681A (en) * 1944-06-21 1950-07-18 Rolfe E Whitaker Turret lathe
US2494196A (en) * 1945-11-13 1950-01-10 Morey Machinery Co Inc Lathe
US2545858A (en) * 1945-11-13 1951-03-20 Morey Machinery Co Inc Headstock and spindle
US2614447A (en) * 1946-05-18 1952-10-21 Sparks Machine Tool Corp Tailstock
US2910905A (en) * 1954-01-19 1959-11-03 Prec Ind Sa Slidable tailstock
US3053127A (en) * 1958-12-10 1962-09-11 Springfield Machine Tool Compa Powered tailstock
US3160041A (en) * 1961-03-21 1964-12-08 Landis Machine Co Tailstock
CN110064766A (zh) * 2018-01-24 2019-07-30 上海络马机电科技有限公司 一种车床尾座助力滑动装置
CN115635370A (zh) * 2022-03-28 2023-01-24 无锡连强智能装备有限公司 一种便于更换的数控晶体滚圆机用尾架机构
CN115635370B (zh) * 2022-03-28 2023-09-05 无锡连强智能装备有限公司 一种便于更换的数控晶体滚圆机用尾架机构

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Publication number Publication date
DE542853C (de) 1932-01-29
GB317636A (en) 1929-08-22
FR676893A (fr) 1930-02-28

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