JPS62173145A - Control data origination device for metalcutting machine - Google Patents

Abstract

PURPOSE:To make selection of tools at every process into automation, by storing specifications of tools available for each process of metalcutting operation into a tool specification memory part, determining the required tool from a machining form, while retrieving the tool in the specifications from the memory part and selecting an optimum tool. CONSTITUTION:This device comprises a tool specification memory part 4 storing specifications of plural tools to be used for metalcutting operation and a machining form input part 1 inputting a machining form to be cut. A process data orignating part 2 originates data on each process consisting of prepared hole cutting, roughing, bottom finishing and side finishing from data of the machining form input part 1. And, a tool specification decision part 3 determines specifications of the required tools for each process. A tool selecting part 5 retrieves a tool of the determined specifications from the tool specification memory part 4 and selects the optimum tool. In addition, a data editing part 6 edits specification data of the selected tool as control data for a metalcutting machine together with process data and form data.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a control data creation device for a cutting machine, and more specifically, a cutting machine that automates the selection of tools used in each process of cutting. The present invention relates to a control data creation device.

(Background Art) FIG. 4 shows a conventional cutting machine control data creation method. As shown in this figure, since b'C, when creating numerical control data for the cutting allowance from the machining drawing Z, the data creator uses his own knowledge and experience to process the shape. Each necessary process, that is, pilot hole machining, rough machining, bottom finishing machining, and side finishing machining, is designed and processed, and the tools to be used in each of these processes are data (1) In Figure 4, process design A is performed manually by a data creator while looking at processing drawing Z.
In this process, the process to process a given shape is determined mainly by considering the accuracy of the process and the shape. Next, the data creator performs tool design B for each process. In this tool design B work, the data creator determines the tool diameter, blade length, number of blades, etc. to be used in each process. Determined based on experience Next, in the coding C operation, input data is created by encoding all data necessary for cutting, such as machining data, process data, and tool data.

Next, this input data is also manually controlled numerically (NC).
) input into the data creation device. The numerical control data creation device creates and outputs a recording medium, such as an NC tape TP or a floppy disk FD, on which numerical control data is recorded from the input data.

However, in such conventional technology, the operator who creates the numerical control data must be a person who has sufficient knowledge of cutting, and therefore, the number of operators who can create fv of the numerical control data is naturally limited. There was a problem.

Furthermore, there is a problem in that variations occur in the processing details, mainly in terms of processing accuracy, depending on the operator who creates the numerical H1ln data, and sometimes a workpiece of poor quality is produced. Furthermore, in the conventional technology, it is necessary to input shape data, process data, tool data, etc., which increases the number of inputs, so it takes a very long time to create numerical control data. Therefore, there was a problem that the cost of creating numerical control data increased.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and its purpose is to automatically select tools for each process from machining shape data. An object of the present invention is to provide a control data creation device for a cutting machine that can obtain control data for a cutting machine.

(Disclosure of the Invention) In order to solve the above-mentioned problems, in the control data creation device for a cutting machine according to the present invention, as shown in FIGS. A tool specification storage unit 4 that stores the specifications of each tool in advance, a machining shape input unit 1 that inputs the machining shape to be cut, and a machining shape input unit 1 that inputs the machining shape data input to the machining shape input unit 1. a process data creation unit 2 that creates data for each cutting process including machining, rough machining, bottom finishing and side finishing;
A tool specification determining unit 3 determines the specifications of the tool necessary for each process of the cutting process from the data of the machining shape, and a tool specification storage unit 4 stores the tool having the specifications determined by the tool specification determining unit 3.
A tool selection unit 5 searches for and selects the most suitable tool, and the specification data of the tool selected by the tool selection unit 5 is input into the process data created by the process data creation unit 2 and the machining shape input unit 1. The system includes a data editing section 6 that edits the shape data input as wholesale data as well as the cutting machine system (wholesale data).

Here, each process of cutting will be briefly explained. First, "preparatory hole machining" refers to the process of digging a preparatory hole at the approximate center of the shape to be machined into the workpiece, which will serve as the starting point for cutting, and "rough machining" refers to the process of digging a preparatory hole to serve as the starting point of cutting. This refers to the process of cutting a hole with a shape close to the required machining shape. The amount of cutting in rough machining is the largest, and the rough machining shape can be roughly completed in this process. In this rough machining, some bottom finishing allowance and side finishing allowance are left uncut, and in bottom finishing machining, the bottom finishing allowance left uncut in the rough machining is shaved off to finish the bottom face of the machined shape.

In side surface finishing, the side surface finishing allowance left uncut during rough machining is removed to finish the side surface of the machined shape.

In the present invention, the specifications of a plurality of tools used in each process of cutting are stored in advance in the tool specification storage unit 4, and the specifications of the tools required for each process of cutting are stored from the machining shape data. Since the specifications are determined and the tool with the determined specifications is searched from the tool specification storage unit 4 to select the optimal tool, it is no longer necessary to input tool data and the work of creating data for cutting is simplified. This saves labor. Also.

When selecting tools, since the subjectivity of the data creator is not included, variations in machining contents are eliminated.

The process design step in the process data creation section 2 may be performed using an automatic design program, or may be designed manually. In this process design, in what order and how many times each process should be carried out, in order to improve quality and processing efficiency,
For pilot hole machining, the machining position and machining depth of the pilot hole are determined, and for rough machining, the dimensions are calculated taking into account the finishing allowance, and then each process is determined. The machining dimensions are input for the number of times, and data for removing the remaining finishing allowance is input for surface machining and side finishing machining. The data output unit 7 outputs numerical control data including shape data required for machining, process data, and tool data to an NC tape TP or a floppy disk FD based on the data edited by the data editing unit 6. It is something.

FIG. 3 shows the data structure of the tool specification storage section 4. The tool specification storage unit 4 has a data structure set so that, if desired tool data is given, a tool search can be performed to find an optimal tool. As for the tool type,
For example, types of tools such as center drill, drill, 2-sided end mill, 4-sided end mill, 2-sided taper end mill, 4-sided taper end mill, polling, tap, etc. are stored. As the tool material, for example, the material of the tool such as 5KH1 carbide, etc. is stored for each tool. Furthermore, tool diameter, effective cutting edge length, chuck lower tool length, tool taper, number of cutting edges, tool tip R.
Data such as 1 cutting coefficient, etc. are stored for each tool.

Figure 2 shows a tool automatic determiner 1t for rough machining and bottom finishing machining.
! It is a flowchart which shows i. In this example, corner R data in rough machining and surface machining, side slope data of the machined shape, cutting depth data, shape depth data, and shape bottom R data are: Each is input in steps 11 to I. Corner R
A plurality of pieces of data are input, and the maximum value MAX and minimum value MIN thereof are calculated in step Sl+. In rough machining and rough machining, the maximum value of corner radius MA
The tool diameter is first determined from
．． ).

From the data on the side slope of the machined shape, this slope is expressed as a fraction, and when the numerator is set to 1, the denominator value D2 is calculated (Step S 2+>. Data TI is calculated by adding the margin value (Step S, 1) and rounding up to the required number of digits (Step S, 2).For shape depth data, add the margin value to this shape depth. Data T2 is calculated by adding (step S, 1) and rounding up to the required number of digits (
Step 8.2).

Furthermore, the data of the shape base R is output as is as data TR.

The data f(D,,D,,T,) obtained in this way.

T = , TR>, the tool specification storage unit 4 is searched to find an appropriate tool. In this case, since we are looking at margin values for the data T, , T2, there is a tolerance range that allows the tool to be a little longer. If the optimum tool is not found even after searching the tool specification storage unit 4, the data f(D+, D2,
T2. T 2 , T R) are output as is as tool data.

In the case where the side surface finishing tool is automatically determined, the minimum value MIN of the corner radius is used as the value adopted in step S12 in FIG. 2. By adopting the system shown in the illustrated embodiment, we were able to reduce the number of data inputs by approximately 0% compared to our conventional system. Additionally, the tool management status has become clearer, and tool setup has become smoother.

(Effects of the Invention) As described above, according to the present invention, since the number of data inputs is reduced, the time required to create control data is shortened. This has the effect of eliminating variations in processing content.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the same, and FIG. 3 is a schematic configuration diagram showing the structure of a tool specification storage unit used in the same.
The figure is a process diagram showing a conventional machining data creation procedure. 1 is a machining shape input section, 2 is a process data creation section, 3 is a tool specification determination section, 4 is a tool specification storage section, 5 is a tool selection section, 6
is the data editing department.

Claims (1)

[Claims] (1) A tool specification storage unit that stores in advance the specifications of multiple tools used for cutting, a machining shape input unit that inputs the machining shape to be cut, and the machining input in the machining shape input unit. A process data creation unit that creates data for each cutting process consisting of pilot hole machining, rough machining, bottom finishing machining, and side finishing machining from the shape data, and a process data creation unit that creates data for each process of the cutting process from the data of the machining shape. a tool specification determination section that determines the specifications of the tool; a tool selection section that searches the tool specification storage section for tools with the specifications determined by the tool specification determination section and selects the most suitable tool; and a data editing section that edits the specification data of the selected tool as control data of the cutting machine together with the process data created by the process data creation section and the shape data inputted by the machining shape input section. Features: Control data creation device for cutting machines.