GB2118328A - Method of controlling operation of two tool rests of a quadriaxial numerical control lathe - Google Patents

Method of controlling operation of two tool rests of a quadriaxial numerical control lathe Download PDF

Info

Publication number
GB2118328A
GB2118328A GB08308869A GB8308869A GB2118328A GB 2118328 A GB2118328 A GB 2118328A GB 08308869 A GB08308869 A GB 08308869A GB 8308869 A GB8308869 A GB 8308869A GB 2118328 A GB2118328 A GB 2118328A
Authority
GB
United Kingdom
Prior art keywords
machining
time
tool rests
predetermined
units
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.)
Withdrawn
Application number
GB08308869A
Inventor
Naoe Fukumura
Masanobu Tanaka
Koji Kimura
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.)
Yamazaki Mazak Corp
Original Assignee
Yamazaki Machinery Works 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 Yamazaki Machinery Works Ltd filed Critical Yamazaki Machinery Works Ltd
Publication of GB2118328A publication Critical patent/GB2118328A/en
Withdrawn legal-status Critical Current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
    • G05B19/4093—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 part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
    • G05B19/40937—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 part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of machining or material parameters, pocket machining
    • G05B19/40938—Tool management
    • 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
    • G05B2219/35—Nc in input of data, input till input file format
    • G05B2219/35512—Display entered, measured values with bargraph
    • 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
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36341—Prepare program to control multiple slides at the same time
    • 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
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41249—Several slides along one axis
    • 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
    • G05B2219/49375—Minimalizing machine time, number of tool change
    • 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
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50015—Multi cutting, twin tools contact at same time workpiece, balance cutting
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Landscapes

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

Abstract

A machining program memory (7) is provided for storing machining programs (PRO) for the two tool rests of a quadriaxial numerical control lathe separately and independently from each other in the form of predetermined machining units. A machining time is computed for each of the predetermined machining units stored in the memory and is displayed on the display device (5) as a time chart for each tool rest. The two time charts are then compared by observing the display device in order to determine whether the operating efficiency of the two tool rests can be increased and if so the machining programs (PRO) are amended accordingly. <IMAGE>

Description

SPECIFICATION Method of controlling operation of two tool rests of a quadriaxial numerical control lathe The present invention relates to a method of controlling the operation of two tool rests of a quadriaxial numerical control lathe.
Since a quadriaxial numerical control lathe has two tool rests, in order to operate these tool rests as efficiently as possible, it is necessary to compute and examine the machining time in accordance with a machining program for each of the tool rests.
Hitherto, the computation of the machining time has been carried out manually, and hence, much time has been necessaryforthe computation. Furthermore, it has been difficult to graps the operational conditions, such as waiting conditions, of two tool rests simply by computing the machining time.
According to the invention, there is provided a method of controlling operation of two tool rests of a quadriaxial numerical control lathe, comprising: preparing a machining program memory storing machining programs for the two tool rests of the quadriaxial numerical control lathe separately and independently from each other in the form of predetermined machining units; computing a machining time for each of said predetermined machining units stored in said machining program memory; displaying on a display device said machining time as a time chart for each of said tool rests; and comparing the two time charts in orderto determine whether it is possible to improve the efficiency of operation of the two tool rests.
If the comparison shows that the two tool rests can be operated more efficiently, the machining programs are amended accordingly. It is thus possible to operate the two tool rests of the quadriaxial numerical control lathe as efficiently as possible.
Preferred and/optional features of the invention are set forth in claims 2 - 8.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: Figure lisa block diagram showing an example of a numerical controller of a quadriaxial numerical control lathe to which the invention is applied; and Figure 2 illustrates how display is effected on a display device.
As shown in Figure 1, a numerical controller 1 has a main control section 2 to which are connected a keyboard 3, a display controller 6 connected with a display device 5 such as a cathode-ray tube, a machining program memory 7 and a machining time computing section 9. The machining program memory 7 has machining programs PRO stored therein for two tool rests, i.e., a first tool rest and a second tool rest separately and independently from each other. The machining programs PRO are arranged in accordance with the order or sequence of execution from the upper side in Figure 1 for respective predetermined machining units. The term "machining unit" is used throughout the specification to mean a machining process PRCS consisting of a series of machining operations executed consecutively by the same tool.Each machining process PRCS contains informations such as a machining process number PNO, a name NAME of a tool employed for execution of the process PRCS in question, a timing flag FLG such as a waiting code for commanding the timing necessary for the first and second tool rests to execute their respective processes in relation to each other, a feed speed VPAT employed in execution of a process PRCS in cutting and rapid feed, and a feed length LOF in the cutting feed region, rapid feed region or total feed region.
The numerical controller 1 having the described construction operates in a manner which will be explained hereinunder. As the operator gives a command for displaying machining time through operation of the keyboard 3, the main control section 2 actuates the machining time computing section 9 to start. The computing section 9 retrieves the machining program memory 7 and computes periods of time necessary for the first and second tool rests to execute their respective machining process PRCS, i.e., machining time. In other words, the period of time required to execute each process PRCS is immediately computed, since the feed speed VPAT and the feed length LOF employed in execution of each process PRCS are previously stored in each process PRCS.The computed period of time is delivered to the display controller 6, together with the process number PNO of the machining process PRCS in question. The controller 6 allows the display device 5 to display, as shown in Figure 2, the machining time of each machining process PRCS for each tool rest as a time chart TCH constituted by a line GLF having a length proportional to the period of time required to execute the process PRCS in question, together with the process number PNO.In this case, the controller 6 reads the timing flag FLG out of the memory 7 in order to display start points STP and end points ENP of the lines GLF corresponding to the processes PRCS shared between the tool rests in such a manner that these start and end points STP, ENP are made to agree with the contents of the machining programs PRO, i.e., the changes with time of the machining conditions in actual machining operations, thereby also displaying the operational conditions of the tool rests such as waiting conditions.
In the embodiment described hereinbefore, the machining processes PRCS which constitute predetermined units of the machining for the first tool rest and those for the second tool rest are stored in the machining program memory 7 perfectly separated and independent from each other (as shown in Figure 1, the machining processes PRCS as to the first tool rest are stored in left hand area, the processes PRCS as to the second tool rest are stored in right hand area.). Needless to say, however, the processes PRCS can be stored in the memory 7 in any desired form, provided that the content of the memory distinctively determines by which tool rest each process PRCS should be executed and the sequence or order of execution of the processes PRCS.
As has been described, the period of time required to execute each machining process PRCS which constitutes predetermined units of the machining, i.e., the machining time is displayed on the display device 5 as the time chart TCH for each tool rest.
These time charts are then compared by observing the display device 5 in order to determine whether the operating efficiency of the tool rests can be increased by eliminating any wasted idle time of the tool rests, such as for example the time between the lines GLF corresponding to processes 3 and 4 in Figure 2. If as a result of the comparison, it is found that the operating efficiency of the two tool rests can be improved, the machining programs for the two tool rests in the machining program memory 7 of the numerical controller are amended accordingly.
Although the invention has been described through a specific embodiment, the described embodiment is only illustrative and not exclusive.
Thus, various changes and modifications may be imparted to the described embodiment without departing from the scope of the invention which is limited solely by the appended claims.

Claims (9)

1. A method of controlling operation of two tool rests of a quadriaxial numerical control lathe, comprising: preparing a machining program memory storing machining programs for the two tool rests of the quadriaxial numerical control lathe separately and independently from each other in the form of predetermined machining units; computing a machining time for each of said predetermined machining units stored in said machining program memory; displaying on a display device said machining time as a time chart for each of said tool rests; and comparing the two time charts in order to determine whether it is possible to improve the efficiency of operation of the two tool rests.
2. A method according to claim 1,wherein each of said predetermined machining units is a machining process as a series of machining operations performed consecutively by employing the same tool.
3. A method according to claim 2, wherein at least the feed speed and feed length employed in execution of said machining process are contained in said machining process stored in said machining program memory.
4. A method according to any one of claims 1-3, wherein numbers are provided to said predetermined machining units stored in said machining program memory, correspondingly to said predetermined machining units and are displayed on said display device, together with their corresponding machining time when they are displayed.
5. A method according to any one of claims 1-3, wherein said time chart is constituted by one or more lines each having a length proportional to a computed machining time.
6. A method according to claim 4, wherein said time chart is constituted by one or more lines each having a length proportional to a computed machin ing time.
7. A method according to claim 5, wherein timing commands for giving instructions concerning timing necessary for said tool rests to execute said predetermined machining units in relation to each other are stored for each of said predetermined machining units in said machining program memory, and start points and end points of said lines displayed on said display device each having a length proportional to the corresponding one of said machining time are displayed in such a manner that these start and end points are made to agree with the changes with time of machining conditions in actual machining operations.
8. A method according to claim 6, wherein timing commands for giving instructions concerning timing necessary for said tool rests to execute said predetermined machining units in relation to each other are stored for each of said predetermined machining units in said machining program memory, and start points and end points of said lines displayed on said display device each having a length proportional to the corresponding one of said machining time are displayed in such a manner that these start and end points are made to agree with the changes with time of machining conditions in actual machining operations.
9. A method of controlling the display of a numerical controller, substantially as hereinbefore described with reference to the accompanying drawings.
GB08308869A 1982-03-30 1983-03-30 Method of controlling operation of two tool rests of a quadriaxial numerical control lathe Withdrawn GB2118328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57051692A JPS58171241A (en) 1982-03-30 1982-03-30 Display control method for numerical controller

Publications (1)

Publication Number Publication Date
GB2118328A true GB2118328A (en) 1983-10-26

Family

ID=12893947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08308869A Withdrawn GB2118328A (en) 1982-03-30 1983-03-30 Method of controlling operation of two tool rests of a quadriaxial numerical control lathe

Country Status (5)

Country Link
JP (1) JPS58171241A (en)
DE (1) DE3311246A1 (en)
FR (1) FR2524663B1 (en)
GB (1) GB2118328A (en)
IT (1) IT1158848B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104503A2 (en) * 1982-09-03 1984-04-04 Mitsubishi Denki Kabushiki Kaisha Numerical control processing system and machine tool including the system
EP0116950A1 (en) * 1983-02-16 1984-08-29 Mitsubishi Denki Kabushiki Kaisha Numerically controlled machining system
DE3627658A1 (en) * 1985-08-15 1987-02-26 Mitsubishi Electric Corp Numerical control device for two tools
US4853867A (en) * 1986-02-25 1989-08-01 Fanuc Ltd Simultaneous four-axis lathe machining time bar-graph display method
EP0458982A1 (en) * 1989-12-18 1991-12-04 Fanuc Ltd. Machining display system
GB2248124A (en) * 1990-09-21 1992-03-25 Mitsubishi Electric Corp Data preparing apparatus
WO2007098724A1 (en) 2006-02-28 2007-09-07 Siemens Aktiengesellschaft System and method for analysing a production process

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6143304A (en) * 1984-08-07 1986-03-01 Fanuc Ltd Numerical controller
JPS61221905A (en) * 1985-03-28 1986-10-02 Okuma Mach Works Ltd Working monitor display system for numerical controller
JPS61249110A (en) * 1985-04-26 1986-11-06 Okuma Mach Works Ltd Load monitor state setting system for numerical control device
JPS62173142A (en) * 1986-01-25 1987-07-30 Matsushita Electric Works Ltd Machining time estimator for electric discharge machining
JPH0253551A (en) * 1988-08-17 1990-02-22 Hitachi Seiki Co Ltd Method and device for displaying work time of numerical control machine tool
DE10308816A1 (en) * 2003-02-27 2004-05-19 Siemens Ag Representation of machine tool or production machine processing steps as processing step icons in a graphical visualization of a process made up of a number of partial processes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183982A (en) * 1975-01-20 1976-07-22 Oki Electric Ind Co Ltd
NL7511705A (en) * 1975-10-06 1977-04-12 Philips Nv NUMERIC CONTROLS FOR A MULTIPLE TOOL MACHINE.

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104503A2 (en) * 1982-09-03 1984-04-04 Mitsubishi Denki Kabushiki Kaisha Numerical control processing system and machine tool including the system
EP0104503A3 (en) * 1982-09-03 1986-03-26 Mitsubishi Denki Kabushiki Kaisha Numerical control processing system and machine tool including the system
EP0116950A1 (en) * 1983-02-16 1984-08-29 Mitsubishi Denki Kabushiki Kaisha Numerically controlled machining system
DE3627658A1 (en) * 1985-08-15 1987-02-26 Mitsubishi Electric Corp Numerical control device for two tools
US4853867A (en) * 1986-02-25 1989-08-01 Fanuc Ltd Simultaneous four-axis lathe machining time bar-graph display method
EP0458982A1 (en) * 1989-12-18 1991-12-04 Fanuc Ltd. Machining display system
EP0458982A4 (en) * 1989-12-18 1994-11-30 Fanuc Ltd Machining display system
GB2248124A (en) * 1990-09-21 1992-03-25 Mitsubishi Electric Corp Data preparing apparatus
US5239475A (en) * 1990-09-21 1993-08-24 Mitsubishi Denki K.K. Data preparing apparatus
WO2007098724A1 (en) 2006-02-28 2007-09-07 Siemens Aktiengesellschaft System and method for analysing a production process
US7933678B2 (en) 2006-02-28 2011-04-26 Siemens Aktiengesellschaft System and method for analyzing a production process

Also Published As

Publication number Publication date
DE3311246A1 (en) 1983-10-13
FR2524663A1 (en) 1983-10-07
FR2524663B1 (en) 1987-06-26
IT1158848B (en) 1987-02-25
IT8367338A0 (en) 1983-03-28
JPS58171241A (en) 1983-10-07

Similar Documents

Publication Publication Date Title
GB2118328A (en) Method of controlling operation of two tool rests of a quadriaxial numerical control lathe
JPH04176539A (en) Interactive numerical control unit
KR910002317B1 (en) Numerical control device
EP0287663B1 (en) Method and apparatus for numerical control having an override playback function
EP0425674A1 (en) Automatic tool selecting system
US5083000A (en) Wire cut type electric discharge machining method and apparatus
KR970707476A (en) METHOD AND APPARATUS FOR ELECTRICAL EDM MACHINING (PROCESS AND DEVICE FOR CONTROLLING EDM MACHINES)
GB2117929A (en) A numerical controller
EP0305533A1 (en) Method of controlling laser oscillator
JPH0563749U (en) Numerical control device with processing time calculation function
EP0331754A1 (en) Cnc program execution apparatus
EP0458982A1 (en) Machining display system
JPH0242510A (en) Display system for working information
EP0692754B1 (en) Numerical control device
JPS61256407A (en) Numerical controller
JP2677889B2 (en) Numerical control unit
JPH0566819A (en) Interactive automatic programming method
JPS6349803A (en) Nc program production system for nc device
JPH0262607A (en) Program checking plotting system
JPS62166951A (en) Scheduled operating method of machining line
JPH076040A (en) Simultaneous processing method for interactive program
EP0436039A1 (en) System for resuming program for automatic operation
JPH07120181B2 (en) Display method
JPH0277904A (en) Nc data origination method
JPH01300306A (en) Automatic programming method

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)