JPS57156150A - Contact detector for machine tools - Google Patents

Contact detector for machine tools

Info

Publication number
JPS57156150A
JPS57156150A JP56038176A JP3817681A JPS57156150A JP S57156150 A JPS57156150 A JP S57156150A JP 56038176 A JP56038176 A JP 56038176A JP 3817681 A JP3817681 A JP 3817681A JP S57156150 A JPS57156150 A JP S57156150A
Authority
JP
Japan
Prior art keywords
potential difference
spindle
contact
secondary current
bearings
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.)
Granted
Application number
JP56038176A
Other languages
Japanese (ja)
Other versions
JPH0132026B2 (en
Inventor
Haruo Omura
Sadamu Kato
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP56038176A priority Critical patent/JPS57156150A/en
Publication of JPS57156150A publication Critical patent/JPS57156150A/en
Publication of JPH0132026B2 publication Critical patent/JPH0132026B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • 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
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B23Q17/2233—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work for adjusting the tool relative to the workpiece
    • B23Q17/2241—Detection of contact between tool and workpiece
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37405—Contact detection between workpiece and tool, probe, feeler

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

PURPOSE:To obtain a contact detector to sense the contact of a tool with a work by detecting the potential difference which occurs before and after the electrical resistance of bearings on the basis of the current flowing along a secondary current path when two objects come into contact with each other. CONSTITUTION:In a circular groove 10a provided in a bearing housing 10a concentric with a spindle 11 is fitted an induction coil 35 comprising an iron core 35a wound with a coil 35b by a pressure plate 36, thereby to produce a magnetic flux surrounding the spindle 11. In the axial direction of the spindle is formed a current path 38 in which a secondary current is induced. The potential difference between the spindle 11 and spindle head 10 which occurs as a result of a voltage drop due to the electric resistance R of bearings 12, 13, 14 is detected by conductors 33, 34 connected via insulating bushes 30, 31, 32. When a tool T comes into contact with a work W, a secondary current begins to flow and consequently a potential difference is caused and this potential difference is detected to sense the contacting condition. The rate of change in the potential difference is so great that the contact can be sensed with a high sensibility by the above arrangement.
JP56038176A 1981-03-17 1981-03-17 Contact detector for machine tools Granted JPS57156150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56038176A JPS57156150A (en) 1981-03-17 1981-03-17 Contact detector for machine tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038176A JPS57156150A (en) 1981-03-17 1981-03-17 Contact detector for machine tools

Publications (2)

Publication Number Publication Date
JPS57156150A true JPS57156150A (en) 1982-09-27
JPH0132026B2 JPH0132026B2 (en) 1989-06-29

Family

ID=12518073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038176A Granted JPS57156150A (en) 1981-03-17 1981-03-17 Contact detector for machine tools

Country Status (1)

Country Link
JP (1) JPS57156150A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06155118A (en) * 1992-11-16 1994-06-03 Rokuroku Sangyo Kk Spindle head for machining center
CN103447860A (en) * 2013-08-27 2013-12-18 西北工业大学 Clamp for measuring milling force for milling and processing blade fixed inclining angle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06155118A (en) * 1992-11-16 1994-06-03 Rokuroku Sangyo Kk Spindle head for machining center
CN103447860A (en) * 2013-08-27 2013-12-18 西北工业大学 Clamp for measuring milling force for milling and processing blade fixed inclining angle

Also Published As

Publication number Publication date
JPH0132026B2 (en) 1989-06-29

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