GB2256728A - Drilling process and apparatus - Google Patents

Drilling process and apparatus

Info

Publication number
GB2256728A
GB2256728A GB9217574A GB9217574A GB2256728A GB 2256728 A GB2256728 A GB 2256728A GB 9217574 A GB9217574 A GB 9217574A GB 9217574 A GB9217574 A GB 9217574A GB 2256728 A GB2256728 A GB 2256728A
Authority
GB
United Kingdom
Prior art keywords
thrust
bit
penetration
matrix
speed
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
GB9217574A
Other versions
GB9217574D0 (en
GB2256728B (en
Inventor
Philip John Rowsell
Martin David Waller
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.)
University of Nottingham
Original Assignee
University of Nottingham
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
Priority claimed from GB909004952A external-priority patent/GB9004952D0/en
Application filed by University of Nottingham filed Critical University of Nottingham
Priority to GB9217574A priority Critical patent/GB2256728B/en
Publication of GB9217574D0 publication Critical patent/GB9217574D0/en
Publication of GB2256728A publication Critical patent/GB2256728A/en
Application granted granted Critical
Publication of GB2256728B publication Critical patent/GB2256728B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34321—Database for control of a single machine
    • 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
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42152—Learn, self, auto tuning, calibrating, environment adaptation, repetition
    • 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
    • G05B2219/45—Nc applications
    • G05B2219/45129—Boring, drilling
    • 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
    • G05B2219/49068—Minimum cost adaptive

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Earth Drilling (AREA)

Abstract

In a drilling process speed, bit thrust and penetration are monitored. Data stored in a data base relating rotational speed and thrust as adjustable variables is correlated with data on the penetration rate as controlled parameter to produce a matrix to enable prediction of penetration rate to be expected at known thrust and rotational rates. Likewise a similar matrix may be constructed for relating wear rate to adjustable variables for example speed and thrust. The parameters predicted from these variables at various values for the speed and thrust are used to construct a further matrix relating bit penetration and bit wear rates with cost per unit distance drilled and this third matrix searched for minimum cost. From the first two matrices rotation rate of the drill bit and thrust applied to the drill bit are adjusted to give a predicted penetration rate for minimum cost and the drill bit is operated at these conditions. All conditions are monitored and the information used to recalculate the various matrices to define the process.
GB9217574A 1990-03-06 1992-08-19 Drilling process and apparatus Expired - Fee Related GB2256728B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9217574A GB2256728B (en) 1990-03-06 1992-08-19 Drilling process and apparatus

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909004952A GB9004952D0 (en) 1990-03-06 1990-03-06 Drilling process and apparatus
PCT/GB1991/000348 WO1991014214A1 (en) 1990-03-06 1991-03-06 Drilling process and apparatus
GB9217574A GB2256728B (en) 1990-03-06 1992-08-19 Drilling process and apparatus

Publications (3)

Publication Number Publication Date
GB9217574D0 GB9217574D0 (en) 1992-10-07
GB2256728A true GB2256728A (en) 1992-12-16
GB2256728B GB2256728B (en) 1994-03-09

Family

ID=26296749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9217574A Expired - Fee Related GB2256728B (en) 1990-03-06 1992-08-19 Drilling process and apparatus

Country Status (1)

Country Link
GB (1) GB2256728B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346444A (en) * 1980-03-20 1982-08-24 Rohr Industries, Inc. Constant thrust adaptive control machine tool
US4854786A (en) * 1988-05-26 1989-08-08 Allen-Bradley Company, Inc. Computer controlled automatic shift drill
EP0339659A2 (en) * 1988-04-28 1989-11-02 Fuji Jukogyo Kabushiki Kaisha Method and apparatus for controlling drilling operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346444A (en) * 1980-03-20 1982-08-24 Rohr Industries, Inc. Constant thrust adaptive control machine tool
EP0339659A2 (en) * 1988-04-28 1989-11-02 Fuji Jukogyo Kabushiki Kaisha Method and apparatus for controlling drilling operation
US4854786A (en) * 1988-05-26 1989-08-08 Allen-Bradley Company, Inc. Computer controlled automatic shift drill

Also Published As

Publication number Publication date
GB9217574D0 (en) 1992-10-07
GB2256728B (en) 1994-03-09

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Legal Events

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

Effective date: 19960306