GB525751A - Improvements in screw-thread chasing mechanism for lathes and like machine tools - Google Patents

Improvements in screw-thread chasing mechanism for lathes and like machine tools

Info

Publication number
GB525751A
GB525751A GB6524/39A GB652439A GB525751A GB 525751 A GB525751 A GB 525751A GB 6524/39 A GB6524/39 A GB 6524/39A GB 652439 A GB652439 A GB 652439A GB 525751 A GB525751 A GB 525751A
Authority
GB
United Kingdom
Prior art keywords
slide
tool holder
spring
nut
work
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
Application number
GB6524/39A
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.)
ZF International UK Ltd
Original Assignee
Joseph Lucas Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Joseph Lucas Ltd filed Critical Joseph Lucas Ltd
Priority to GB6524/39A priority Critical patent/GB525751A/en
Priority to US319349A priority patent/US2248692A/en
Publication of GB525751A publication Critical patent/GB525751A/en
Expired legal-status Critical Current

Links

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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B23Q5/406—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw with means for meshing screw and nut
    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/64—Movable or adjustable work or tool supports characterised by the purpose of the movement
    • B23Q1/68—Movable or adjustable work or tool supports characterised by the purpose of the movement for withdrawing tool or work during reverse movement
    • 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
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5178—Attachment
    • 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
    • Y10T82/20—Lathe for screw cutting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Turning (AREA)

Abstract

525,751. Lathes. LUCAS, Ltd., J., and ADCOCK, H. Feb. 28, 1939, No. 6524. [Class 83 (iii)] A screwthread cutting mechanism for a lathe comprises a chasing-cutter f mounted in a tool holder e which is movable transversely of the work c and carries a nut segment h engaging a lead screw i, the tool holder being mounted on a longitudinal slide a which carries means for moving the tool holder to and from the work. The nut segment is preferably secured to a post g on the tool holder by a spring plunger j so that the nut may be disengaged if abnormal resistance is encountered. An opening n in the tool holder carries an inclined abutment shoulder o and an end member x carries another inclined shoulder w these shoulders co-acting with a vertically movable member m mounted in the slide. A spring q bearing at one end on an abutment s fixed to the slide normally urges the tool holder away from the work, the parts then being in the position shown in Fig. 4 with the nut disengaged. The lead screw which is driven from a shaft z through a clutch, not shown, is mounted in bearings y carried by a cross slide 3 on which the slide a is mounted. In operation, during rotation of the master screw, a cam 4 on the screw, depresses the member m whereby the surfaces o, p coact to move the tool holder up to the work against the spring pressure and to engage the nut segment. The depth of cut is determined by the cross slide 3. At the end of the ensuing longitudinal movement a wedge piece 6 on the slide a encounters an adjustable stop 5 and is moved against a spring 8 to shift the member m upwardly thus withdrawing the tool and the nut segment, Fig. 4. The slide a is then returned by a spring 14 or by a weight and the operation is repeated when the member m is once more depressed by the cam 4. Further depth feed may be imparted by the cross-slide 3 and when the required thread is completed the lead screw is stopped by disengaging the clutch in the drive of the shaft z.
GB6524/39A 1939-02-28 1939-02-28 Improvements in screw-thread chasing mechanism for lathes and like machine tools Expired GB525751A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6524/39A GB525751A (en) 1939-02-28 1939-02-28 Improvements in screw-thread chasing mechanism for lathes and like machine tools
US319349A US2248692A (en) 1939-02-28 1940-02-16 Screw-thread chasing mechanism for lathes and like machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6524/39A GB525751A (en) 1939-02-28 1939-02-28 Improvements in screw-thread chasing mechanism for lathes and like machine tools

Publications (1)

Publication Number Publication Date
GB525751A true GB525751A (en) 1940-09-04

Family

ID=9816078

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6524/39A Expired GB525751A (en) 1939-02-28 1939-02-28 Improvements in screw-thread chasing mechanism for lathes and like machine tools

Country Status (2)

Country Link
US (1) US2248692A (en)
GB (1) GB525751A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101093B (en) * 1954-06-08 1961-03-02 Carl Hasse & Wrede G M B H Thread turning device
US3102445A (en) * 1959-07-16 1963-09-03 Martin D Elledge Lathe tool holding and operating attachment
US3157091A (en) * 1961-12-18 1964-11-17 Michigan Tool Co Feed mechanism
US3209628A (en) * 1963-06-05 1965-10-05 Pneumo Dynamics Corp Automatic thread chasing mechanism
FR1472129A (en) * 1965-12-27 1967-03-10 Ernault Somua H Threading device

Also Published As

Publication number Publication date
US2248692A (en) 1941-07-08

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