JPS61274841A - Method of determining tool - Google Patents

Abstract

PURPOSE:To judge the allowable minimum machining diameter and prevent interference with a workpiece by forming machining data from the data of the optimum tool which is selected in accordance with specified machining data such as the machining program. CONSTITUTION:When the turning operation of the inside diameter of a workpiece 10 is to be carried out by a throw-away tip 12 held by a holder 11, a machining program for commanding a defied machining procedure to a machine 7, is stored in program memory 5. When the tool number of a tool file, together with machining data based on a drawing, is inputted from a data inputting device 3, machining data are formed from the data on the determined optimum tool and the machining program. As a result, machining data which does not interfere with material can be accurately formed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to, 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. Then, create processing data (program tape) for numerical control (NC). and N
The C device numerically controls the machine tool based on machining data to perform desired machining on the workpiece.

In such cutting processes, the tools used are different depending on the type of machining, such as drilling and flat machining, and tools (bites) of various shapes are prepared even for the same flat machining, and the machining shape of the workpiece is Different tools are used depending on the area and the part to be machined. Therefore, when specifying NC machining data and automatically creating a machining program, it is necessary to create a list of prepared tools (tool list) and use the optimal tool according to the material of the workpiece and the part to be machined. A selection is made. Furthermore, since the cutting conditions such as the speed when driving the tool and the correction value for the depth of cut change, multiple cutting condition files are usually prepared, and machining data is determined according to the file corresponding to the selected tool. I was doing it.

(Problem to be solved by the invention) By the way, in turning with a boring hole, if the tool is not selected according to the inner diameter of the machined part, interference between the tool holder and the material (workpiece) will occur, and the created machining An alarm is likely to occur when the NC device is forgotten to operate due to machining tape, etc. This is because, for example, tools for machining the same inner diameter round piece are available with different cutting edge shapes, and they must be held at the same time. This is because the shape of the holder is different.
Particularly in the case of special holders and tools other than standard tools, there is a problem in that the appropriate tool can only be selected by a skilled technician at the work site.

An object of the present invention is to select a tool selection method from specified machining data in consideration of the minimum allowable machining diameter of a prepared tool, and to easily create a suitable NC machining tape. is to provide.

(Means for Solving the Problems) The present invention provides a tool determination method that includes an interactive machining program and determines an optimal tool for machining a workpiece into a predetermined shape based on specified machining data. A storage means for storing data on the cutting edge attached to the tip of the tool as well as the outer shape of the holder that holds the cutting edge as a tool file, and storing specified machining data such as the machining part of the workpiece and the machining shape from the tool file. The control means selects an optimal tool accordingly, and machining data is created from data regarding the selected optimal tool and the machining program.

(Operation) That is, in the present invention, the allowable minimum machining diameter during internal diameter machining is determined from the external shape of each tool holder in the tool file to prevent interference with the workpiece.

(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
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 shaft of the processing machine 7, and the like are connected.

FIG. 1 shows an example of a tool file used by a programmer to determine an optimal tool for machining a workpiece into a predetermined shape based on an interactive machining program using this type of NC device.

The tool file specifies inner diameter machining using a macro command that specifies the major classification of the menu, specifies the program number of the custom macro called from the program memory 5, calls the detailed menu, and inputs the data for predetermined inner diameter machining. At this time, a program for automatic tool determination is activated and displayed on the display device 4. The data in this tool file includes tool type (TP), cutting edge radius (RN), cutting edge angle (AC), cutting edge angle (AN), cutting edge protection angle (AP), and virtual cutting edge position (XN, ZN). Tool holder diameter (H
D) is registered and can be displayed, and the process type (KP) is registered and can be displayed.
), tool selection number (T N), tool compensation number (TM),
Necessary data such as mounting angle (AS), mounting position (XS, ZS), and X mirror image (ON, 0FF) can be set.

In this way, along with the cutting edge data in the tool file,
By registering the tool holder diameter, it can be used according to the stored data regarding multiple tools and the machining process of the workpiece.
The tool with the minimum machining diameter corresponding to the machining area can be selected from the tools prepared by the machining machine 7.

FIG. 3 shows how, for example, the inner diameter of a workpiece 10 is turned with the indexable tip 12 held in the holder 11 for cutting the inner diameter. If a custom macro program is configured to select the optimum tool from the tool file and display the tool shape along with the workpiece on the display device as shown in FIG. 3, tool selection can be made more easily.

In this way, the machining program that instructs the machining Wt7 to perform a certain machining process is stored in the program memory 5, and when the tool number of the tool file is inputted from the data input device 3 along with the machining data based on the drawing, it is determined that Machining data is created from data regarding the optimal tool and the machining program. In other words, processing from NC device 4!17
When determining the most suitable tool for machining, the processing machine 7 usually does not have a holder that is compatible with all machining diameters. With the method of the above embodiment, which allows easy selection of suitable tools, even an unskilled engineer can accurately create machining data without interference with the material.

Although the above embodiment describes the tool determination method for inner diameter machining in 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, the optimum tool is selected from specified machining data in consideration of the minimum allowable machining diameter of the prepared tool, and it is possible to easily carry out appropriate NC machining. It is possible to provide a tool determination scheme that can create tapes.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a tool file of the present invention,
FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a block diagram of an embodiment of the present invention.
FIG. 3 is a diagram showing the relationship between a tool and a workpiece. ■...CPU, 3...Data input device, 4...Display device, 5...Program memory, 6...Data memory, 7...Processing machine. Patent applicant: Representative of FANUC Co., Ltd. Patent attorney: Minoru Tsuji Figure 1

Claims (1)

[Claims] In a tool determination method that is equipped with an interactive machining program and determines the optimal tool for machining a workpiece into a predetermined shape based on specified machining data, the cutting edge is It is equipped with a storage means for storing the external shape of the holder to be held as a tool file, and a control means for selecting an optimal tool from this tool file according to specified machining data such as the machining part of the workpiece and the machining shape. A tool determining method characterized in that a machining tape is created from data regarding the selected optimal tool and the machining program.