JPS61257740A - Tool selection system - Google Patents

Abstract

PURPOSE:To prepare correct machining data and readily select the most suitable tool by outputting tool selection menus according to machining process on the screen of a display unit to picture a workpiece final shape in the selection of the most suitable tool used by an NC lathe or the like. CONSTITUTION:A data input unit 3, display unit 4, program memory 5, data memory 6 for storing data, control section 8 to control the main spindle of a machining device 7, and so on are connected with the bus 2 of a CPU 1. When a tool of different cutting edge angle, for example, is selected as the most suitable tool according to the data stored in the data memory 6 on a plurality of tools and the machining process of a workpiece, the machining trajectories are operated by the CPU 1 to be pictured on the display unit 4 along with the final shape of the workpiece. And a tool selection menu to select the most suitable tool is displayed for a programmer to prepare correct machining data.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applicable to 1, for example, a computer-controlled NC lathe, etc.
This invention relates to a tool determination method for determining the optimal tool for machining a workpiece into a predetermined shape based on an interactive machining program.

(Conventional technology) When machining a workpiece with a machine tool such as a cutting tool, drill, or milling cutter, in order to create a workpiece with a complex and elaborate structure, position coordinates must be determined using a keyboard or display, for example. and create machining data for numerical control (NC). Then, the NC device numerically controls the machine tool based on the machining data to perform desired machining on the workpiece.

In such cutting operations, tools (bites) of various shapes are prepared, and tools are used depending on the shape of the workpiece, as well as the types of processing. When the material of the workpiece or the tool changes, the cutting conditions such as the speed at which the tool is driven and the correction value for the depth of cut change. Therefore, when creating machining data for NC, usually multiple cutting conditions are used. A file is prepared, and machining data is determined by the file corresponding to the selected tool.

(Problem to be solved by the invention) In this way, conventional machining data differs depending on the tool, and even when using a different tool depending on the machining shape of the workpiece, there is an uncut part due to the shape of the cutting edge (chip) at the tip of the tool. occurs,
For example, in rough machining, the finish machining may be affected by the shape of the uncut parts, and there is a problem in that the selection of the optimal tool depends on factors such as the skill of the programmer.

An object of the present invention is to provide a tool selection method that facilitates the determination of the optimal tool and accurately creates machining data by outputting a tool selection menu according to the machining process on a display screen that draws the final shape of the workpiece. There is a method to provide.

(Means for Solving the Problems) In the present invention, in a tool determination method that determines the optimal tool for machining a workpiece into a predetermined shape based on an interactive machining program, data regarding a plurality of tools and machining shape data are used. a storage means for storing data, a control means for simultaneously selecting and controlling one or more specific tools from among the tools according to the machining process such as the data regarding the tool, the machined part of the workpiece and the roughness of the finished surface; a calculation means for calculating a machining path by a specific tool from the machining shape data; a display means for simultaneously drawing the final shape of the workpiece along with the calculated machining paths; and determining an optimal tool by discarding the calculated machining paths. and a data input means for creating machining data from data regarding the determined optimal tool and the machining program.

(Operation) That is, in the present invention, one or more specific tools are selected according to the stored data regarding a plurality of tools and the machining process of the workpiece, the machining path is calculated, and the final shape of the workpiece is displayed on the display screen. can be drawn to present the programmer with a tool selection menu for determining the optimal tool.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

Process the machining program using a microprocessor,
The NC device that selects and controls the drive of a predetermined tool, such as a cutting tool, is operated by a CPU, as shown in FIG.
Connected to path 2 of I are a data input device 3, a display device 4, a program memory 5, a data memory 6 for storing data, a control section 8 for controlling the drive axis of the processing machine 7, and the like.

Figure 2 shows the programmer using this type of NC device.

It shows a tool selection menu for determining the optimal tool for machining a workpiece into a predetermined shape based on an interactive machining program.

Depending on the data regarding the plurality of tools stored in the data memory 6 and the machining process of the workpiece, for example, tools I with different cutting edge angles are selected from among the tools prepared by the processing machine 7.
When TI is selected as a specific tool, its machining paths (paths I, II) are calculated by the CPUI, and these are drawn on the display screen of the display device 4 together with the final shape 9 of the workpiece. At this time, pass 1. II is displayed in the display color of the final shape 9 of the workpiece, and I and IT are displayed in different display colors.The message section of the display screen shows the selection number and tool name, and the tool selection menu for determining the optimal tool is shown to the programmer. Presented.

A machining program that instructs the machining machine 7 to perform a certain machining process is stored in the program memory 5, and when the tool number from the tool selection menu is input from the data input device 3 together with the machining data based on the drawing, the machine 7 is determined. Machining data is created from data regarding the optimal tool and the machining program. In this way, when determining the most suitable tool for machining with the processing machine 7 from the NC device, it is common for machining Ia7 not to have a tool that can cut all machining shapes, so it is necessary to By calculating and displaying the machining path based on data stored in tooling files for specific tools selected according to the machining process, such as the machining area and the roughness of the finished surface, it is easy to determine the optimal tool. Although the above embodiment describes a tool determination method for turning, tool determination can be performed in the same way for milling or drilling.

(Effects of the Invention) As explained above, according to the present invention, by outputting a tool selection menu according to the machining process on the display screen that draws the final shape of the workpiece, it is possible to easily determine the optimal tool.
It is possible to provide a tool determination method that can accurately create machining data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of an optimal tool selection menu. DESCRIPTION OF SYMBOLS 1... CPU, 3... Data input device, 4... Display device, 5... Program memory, 6... Data memory, 7... Processing machine.

Claims (1)

[Claims] In a tool determination method that determines the optimal tool for machining a workpiece into a predetermined shape based on an interactive machining program, a storage means that stores data regarding a plurality of tools and machining shape data, and a storage means that stores data regarding the tool and information about the workpiece. a control means for simultaneously selecting and controlling one or more specific tools from among the tools according to the machining process such as the machining area and the roughness of the finished surface; and a calculation for calculating machining paths by these selected specific tools from the machining shape data. display means for simultaneously drawing the final shape of the workpiece along with the calculated machining paths; and data input means for discarding the calculated machining paths and determining the optimum tool. A tool determination method characterized in that machining data is created from data regarding the optimal tool determined by the operator and the machining program.