Patent EP0089561A2 successfully refreshed from Google Patents.
EP0089561A2
Expired / Lapsed
EP
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Machine tool numerical controller with an interference checking function
Assignee: Toyoda Koki KK
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Filing: 1983-03-10
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Granted: —
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Expires: 2003-03-10
Abstract
Abstract A numerical controller for a machining center is provided with a microprocessor connected to a data input device, a CRT display device and a data storage device. The microprocessor prepares an NC program for a workpiece to be machined, based upon machining information manually input by the use of the data input device and stored in the data storage device. The debugging of the prepared NC program is then executed, wherein the microprocessor obtains by calculation a workpiece interference space defined outwardly of the outer periphery of the workpiece, based upon workpiece blank shape and dimension data and workpiece mounting position data stored in the data storage device. The microprocessor further calculates based upon the NC program a tool path along which a tool spindle of the machining center would be moved relative to a work table in accordance with the NC program. The microprocessor ascertains based upon the tool path, a tool interference space, defined outwardly of the outer periphery of each tool, and the workpiece interference space, whether or not the tool interference space would enter the workpiece interference space in any rapid feed movement if relative movement between the tool spindle and the work table were effected in accordance with the NC program. When detecting the entry of the tool interference space into the workpiece interference space as a result of such ascertainment, the microprocessor displays on the CRT screen a message informing an operator as to the occurrence of an interference.
Inventors
- 👤 Kenichi Munekata
- 👤 Yoshio Doi
- 👤 Isao Suzuki
- 👤 Shigeru Doi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 06:25
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4061; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35287; G05B2219/49; G05B2219/49157; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2502
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
In a machine tool numerical controller for controlling relative movement between a tool spindle and a work table respectively carrying a tool and a workpiece to be machined, in accordance with a numerical control program, the improvement comprising: data input means for inputting blank shape data indicating the blank shape and dimension of said workpiece and mounting position data indicating a mounting position of said workpiece on said work table; data storage means for storing said numerical control program and said blank shape data and said mounting position data input by said data input means; calculation means connected to said data storage means for obtaining by calculation a workpiece interference space defined outwardly of an outer periphery of said workpiece. based upon said blank shape data and said mounting position data stored in said data storage means; and interference detection means for detecting a rapid feed interference when engagement of one of said tool and a tool interference space defined outwardly of an outer periphery of said tool with said workpiece interference space in rapid feed positioning movement is confirmed by calculation or through actual relative movement between said tool spindle and said work table in accordance with said numerical control program.
Claim 2
Dependent Claim
202 words
In a machine tool numerical controller for controlling relative movement between a tool spindle and a work table respectively carrying a tool and a workpiece to be machined, in accordance with a numerical control program, the improvement comprising: data input means for inputting blank shape data indicating the blank shape and dimension of said workpiece and mounting position data indicating a mounting position of said workpiece on said work table; data storage means for storing said numerical control program and said blank shape data and said mounting position data input by said data input means; calculation means connected to said data storage means for obtaining by calculation a workpiece interference space defined outwardly of an outer periphery of said workpiece. based upon said blank shape data and said mounting position data stored in said data storage means; and interference detection means for detecting a rapid feed interference when engagement of one of said tool and a tool interference space defined outwardly of an outer periphery of said tool with said workpiece interference space in rapid feed positioning movement is confirmed by calculation or through actual relative movement between said tool spindle and said work table in accordance with said numerical control program.
Claim 3
Dependent Claim
257 words
In a machine tool numerical controller for controlling relative movement between a tool spindle and a work table respectively carrying a tool and a workpiece to be machined, in accordance with a numerical control program, the improvement comprising: data input means for inputting blank shape data indicating the blank shape and dimension of said workpiece and mounting position data indicating a mounting position of said workpiece on said work table; data storage means for storing said numerical control program, said blank shape and mounting position data input by said data input means and a tool interference space defined outwardly of an outer periphery of said tool: first calculation means connected to said data storage means for obtaining by calculation a workpiece interference space defined outwardly of an outer periphery of said workpiece. based upon said blank shape data and said mounting position data stored in said data storage means: second calculation means connected to said data storage means for calculating based upon said numerical control program a tool path along which said tool spindle would be moved relative to said work table in accordance with said numerical control program: and interference detection means for detecting by calculation based upon said tool path, said tool interference space and said workpiece interference space whether or not, one of said tool and said tool interference space would be engaged with said workpiece interference space in any rapid feed positioning movement if relative movement between said tool spindle and said work table were controlled in accordance with said numerical control program.
Claim 4
Dependent Claim
257 words
In a machine tool numerical controller for controlling relative movement between a tool spindle and a work table respectively carrying a tool and a workpiece to be machined, in accordance with a numerical control program, the improvement comprising: data input means for inputting blank shape data indicating the blank shape and dimension of said workpiece and mounting position data indicating a mounting position of said workpiece on said work table; data storage means for storing said numerical control program, said blank shape and mounting position data input by said data input means and a tool interference space defined outwardly of an outer periphery of said tool: first calculation means connected to said data storage means for obtaining by calculation a workpiece interference space defined outwardly of an outer periphery of said workpiece. based upon said blank shape data and said mounting position data stored in said data storage means: second calculation means connected to said data storage means for calculating based upon said numerical control program a tool path along which said tool spindle would be moved relative to said work table in accordance with said numerical control program: and interference detection means for detecting by calculation based upon said tool path, said tool interference space and said workpiece interference space whether or not, one of said tool and said tool interference space would be engaged with said workpiece interference space in any rapid feed positioning movement if relative movement between said tool spindle and said work table were controlled in accordance with said numerical control program.
Claim 5
Dependent Claim
105 words
A machine tool numerical controller as set forth in Claim 2, further comprising: data read-out means connected to said data storage means for successively reading out therefrom a plurality of NC data blocks constituting said numerical control program: and means responsive to each of said NC data blocks read out from said data read-out means for ascertaining whether said each of said NC data blocks includes a rapid feed rate command or not and for causing said second calculation means and said interference detection means to operate each time said each of said NC data blocks is ascertained to include said rapid feed rate command.
Claim 6
Dependent Claim
129 words
A machine tool numerical controller as set forth in Claim 3, wherein: said second calculation means is responsive to each of said NC data blocks including said rapid feed rate command for calculating a coordinate position to which said tool spindle would be moved each time said tool spindle is moved by a predetermined distance relative to said work table in accordance with said each of said NC data blocks including said rapid feed rate command; and said interference detection means is responsive to said calculated coordinate position, said tool interference space and said workpiece interference space for detecting by calculation whether one of said tool and said tool interference space would be engaged with said workpiece interference space if said tool spindle were moved to said coordinate position.
References Cited (Backward Citations)
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