GB1001046A - Broken tool detection in machine tools - Google Patents

Broken tool detection in machine tools

Info

Publication number
GB1001046A
GB1001046A GB989463A GB989463A GB1001046A GB 1001046 A GB1001046 A GB 1001046A GB 989463 A GB989463 A GB 989463A GB 989463 A GB989463 A GB 989463A GB 1001046 A GB1001046 A GB 1001046A
Authority
GB
United Kingdom
Prior art keywords
tools
coils
machine
tool
broken
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
GB989463A
Inventor
Aubrey Hudson White
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.)
James Archdale and Co Ltd
Original Assignee
James Archdale and Co 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 James Archdale and Co Ltd filed Critical James Archdale and Co Ltd
Priority to GB989463A priority Critical patent/GB1001046A/en
Publication of GB1001046A publication Critical patent/GB1001046A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
    • B23Q17/0957—Detection of tool breakage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Drilling And Boring (AREA)

Abstract

1,001,046. Detecting broken tools magnetically. JAMES ARCHDALE & CO. Ltd. Feb. 5, 1964 [March 13,1963], No.9894/63. Heading G1N. [Also in Division B3] In a multi-drilling machine each of the tools 4 passes through a loop 3 containing a pair of coils 5, 6, and completes a magnetic coupling, but if one of the tools is broken the coupling is not made, a signal lamp 16 is lit, and the machine is stopped. A pair of loops 3 is fixed on the machine, and tools 4 extend through the loop 5. Primary coils 5 are connected in series to an oscillator 9, powered by a D.C. power unit 10, from A.C. mains 11, and secondary coils 6 form a pair of arms of an A.C. bridge circuit, the other arms of which are formed by a potentiometer 12. The output from the bridge circuit is amplified at 14, to control a relay 15 which lights signal lamp 16, and operates a contactor 17, to stop the machine tool. Coils 5 are energized only when the tools are fully withdrawn and switch 13 is closed by the tool carriage. If a tool is broken the coupling between coils 5 and 6 is reduced, the bridge circuit is unbalanced and lamp 16 is lit, and the machine is stopped. A number of pairs of loops may be used, and in the case of a single tool to be tested, a dummy loop is used.
GB989463A 1963-03-13 1963-03-13 Broken tool detection in machine tools Expired GB1001046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB989463A GB1001046A (en) 1963-03-13 1963-03-13 Broken tool detection in machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB989463A GB1001046A (en) 1963-03-13 1963-03-13 Broken tool detection in machine tools

Publications (1)

Publication Number Publication Date
GB1001046A true GB1001046A (en) 1965-08-11

Family

ID=9880766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB989463A Expired GB1001046A (en) 1963-03-13 1963-03-13 Broken tool detection in machine tools

Country Status (1)

Country Link
GB (1) GB1001046A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172224A (en) * 1985-03-15 1986-09-17 Daishowa Seiki Machine tool contact detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172224A (en) * 1985-03-15 1986-09-17 Daishowa Seiki Machine tool contact detector
FR2578771A1 (en) * 1985-03-15 1986-09-19 Daishowa Seiki CONTACT DETECTOR FOR MACHINE TOOL

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