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GB1436474A - Numerical constrol system for machine tools - Google Patents

Numerical constrol system for machine tools

Info

Publication number
GB1436474A
GB1436474A GB2714974A GB2714974A GB1436474A GB 1436474 A GB1436474 A GB 1436474A GB 2714974 A GB2714974 A GB 2714974A GB 2714974 A GB2714974 A GB 2714974A GB 1436474 A GB1436474 A GB 1436474A
Authority
GB
United Kingdom
Prior art keywords
tool
force
cutting
programmes
feedrate
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
GB2714974A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1436474A publication Critical patent/GB1436474A/en
Expired 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
    • G05B19/416—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 characterised by control of velocity, acceleration or deceleration
    • G05B19/4163—Adaptive control of feed or cutting velocity
    • 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
    • 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
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49169—Compensation for temperature, bending of tool
    • 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
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49186—Deflection, bending of tool

Landscapes

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

Abstract

1436474 Gauging INTERNATIONAL BUSINESS MACHINES CORP 19 June 1974 [23 Aug 1973] 27149/74 Heading B3B [Also in Division G3] In a numerical control system for a machine tool, the force/deflection characteristics of the machine tool-cutting tool combination are calibrated by translating tool support 41, Fig. 3B, by a predetermined distance #Y while its end abuts a deflection testing surface A, the increase in force F 2 -F 1 being sensed by devices 33, Fig. 1. The distance #Y is determined from a tool position at which either a circuit is closed indicating contact of tool and surface A, or a predetermined bias force F 1 is measured. The corresponding position of the tool support is assessed relative to an expected position, itself related to estimated tool diameter, to determine actual tool diameter, which may change due to wear. The calibration data is used in the execution of a part programme providing adaptive control signals to the machine tool, sensors 33 and tool spindle tacho (70), Fig. 8C (not shown) providing actual force and speed data. If the program is to be executed to a given cutting tolerance, the calibration data is processed to indicate a corresponding maximum allowable cutting force, which is fed to the process control computer 50 along with the part program from disc store 10. A library of deflection characteristics for a number of tools may be established, as may a library of part programmes each with an index whereby an operator may call it up. The processed calibration data controls the feedrate in accordance with the desired tolerance. The programme itself has maximum feedrate data although, for air gaps in the machining, the actual feedrate may be allowed to exceed this. A part programme data processing computer (9), Fig. 5 (not shown) may be used to prepare programmes for storage on magnetic tape (80) having access, along with the disc store, to the process control computer. Software embodiments of the calibration, and part, programmes are described in detail, hardware embodiments also being mentioned. A tool can be calibrated while other tools attached to the machine tool are cutting parts. The tool may be a milling cutter.
GB2714974A 1973-08-23 1974-06-19 Numerical constrol system for machine tools Expired GB1436474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39099073A 1973-08-23 1973-08-23

Publications (1)

Publication Number Publication Date
GB1436474A true GB1436474A (en) 1976-05-19

Family

ID=23544773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2714974A Expired GB1436474A (en) 1973-08-23 1974-06-19 Numerical constrol system for machine tools

Country Status (5)

Country Link
JP (1) JPS546099B2 (en)
DE (1) DE2434032C2 (en)
FR (1) FR2241380B1 (en)
GB (1) GB1436474A (en)
IT (1) IT1015221B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114728392A (en) * 2019-11-12 2022-07-08 基斯特勒控股公司 Cutting machine tool with a force sensor, method for operating such a cutting machine tool, and method for calibrating a force sensor of such a cutting machine tool
CN117872962A (en) * 2024-03-11 2024-04-12 南通钜盛数控机床有限公司 Control system of numerical control machine tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013011018A1 (en) 2013-07-02 2015-01-08 Hüttenhölscher Maschinenbau GmbH & Co. KG Method and arrangement for checking a boring mill
EP3933524B1 (en) * 2020-07-02 2025-11-26 Kistler Holding AG Method and device to ascertain a quality of a product obtained by subtractive manufacturing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901927A (en) * 1957-12-27 1959-09-01 Ibm Automatic machine tool
US3220315A (en) * 1964-05-15 1965-11-30 Cincinnati Milling Machine Co Machine tool adaptive control
GB1163776A (en) * 1966-11-23 1969-09-10 Hayes Engineers Leeds Ltd Improvements in or relating to the control of Machine Tools

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114728392A (en) * 2019-11-12 2022-07-08 基斯特勒控股公司 Cutting machine tool with a force sensor, method for operating such a cutting machine tool, and method for calibrating a force sensor of such a cutting machine tool
CN117872962A (en) * 2024-03-11 2024-04-12 南通钜盛数控机床有限公司 Control system of numerical control machine tool

Also Published As

Publication number Publication date
DE2434032C2 (en) 1982-12-02
FR2241380A1 (en) 1975-03-21
IT1015221B (en) 1977-05-10
FR2241380B1 (en) 1979-05-25
DE2434032A1 (en) 1975-02-27
JPS546099B2 (en) 1979-03-24
JPS5045187A (en) 1975-04-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee