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 Numerical control apparatus

Details
Inventors: Shima, Atsushi; Sasaki, Takao;
Assignee: Fanuc Ltd (Minamitsuru, JP)
Primary Examiner: Ruggiero; Joseph
Assistant Examiner:
Attorney, Agent or Firm: Staas & Halsey

In a numerical control apparatus, tools to be used are sequentially read out from a tool order list in accordance with an order of tools to be used (S2, S9), and blocks read out from the source program and using the tools are searched (S3, S6). A new program is created in accordance with a designated tool order (S4), and machining commands are generated by the new program.

DETAILED DESCRIPTION It is an object of the present invention to solve the above conventional drawback, by providing a numerical control apparatus, wherein the number of tool replacement times can be minimized.
It is another object of the present invention to provide a numerical control apparatus wherein the number of tool replacement times can be minimized within a designated range by designating all or part of a source program for machining.
In order to achieve the above objects of the present invention, there is provided a numerical control apparatus comprising: source program storage means for storing a source program which is not processed to designate a minimum number of tool replacement times; tool order setting means for storing data representing the order in which tools are to be used in machining in accordance with the source program; tool order change command means for generating a change command for changing the order of tools used in machining; program updating means for receiving the change command from said tool order change command means and for updating the source program in accordance with the order designated by said tool order setting means; and tool order updated program storage means for storing the updated source program.
The numerical control apparatus further comprises tool order change range designating means for designating a range of a tool order change.
In the numerical control apparatus of the present invention, a tool order list is entered by tool numbers or the like at the tool order setting means, the tool order change range is entered by sequence numbers or the like of the source program at the tool order change range designating means, and the change command is entered at the tool order change command means.
Upon reception of these inputs, the program updating means edits the source program within the change range in accordance with the designated tool order, and causes the tool order updated program storage means to store the updated program.
An output is generated in accordance with the updated program so as to perform NC machining by with a minimum number of tool replacement times


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