JPH0425346A - Method and device for automatic division of work stage in automatic programming device - Google Patents

Abstract

PURPOSE:To decide on a first and second work areas efficiently even by the person of less experiences, by automatically dividing the work areas of the first and second work stages from input start point, finishing shape and raw material shape. CONSTITUTION:A CPU 1 starts a stage dividing processing, when raw material shape and finishing shape are input from an input device 4. Lst and 2nd work stage zones are divided at the designated position in caase of the stage division. On the other hand, the stage division position is automatically decided in case of there bing no stage division designation input and the first and second work stage zones are divided at this position. On completion of this division, the raw material and finishing shapes are written in a prepared data memory zone 10 on each 1st and 2nd stages. Thereafter, the raw material shape and finishing shape of the 1st and 2nd stages are displayed on a display device 3 based on the shape data written in these prepared data memory zone 10. When a worker decides that the stage division position is unproper from the displayed finishing shape, he can correct it with the keyboard input from the terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for automatically dividing processing steps in an automatic programming device. More specifically, in an interactive automatic programming device that automatically creates turning NC data,
The machining process is started from the first machining process (
The present invention relates to an automatic processing process division method for an automatic programming device that automatically divides processing steps into a second processing step (front surface processing) and a second processing step (back surface processing).

[Prior Art] In an NC machine tool, a tool path is instructed by a program (NC data). This route is manually programmed. This manual programming, in which a person calculates and programs the tool path, requires many man-hours for programming. In recent years, in order to reduce the number of programming steps, automatic programming devices have been used that input data interactively using a CRT screen and create NC data from component drawings and the like with simple operations.

Various methods for automatically creating NC data for turning have been proposed and implemented.

For example, JP-A-61-103213 describes an NC data creation method that can automatically determine the order of required machining steps and machining area from pre-classified material shape data and finished shape data. has been done.

[Problems to be Solved by the Invention] The NC data creation method described above automatically determines the order of processing steps. However, in recent years, two
A type with two main axes has emerged. This type of NC lathe holds the workpiece with the first spindle chuck and processes the surface of the workpiece, then picks up and holds the workpiece with the second spindle chuck, and processes the back side of the workpiece. It is being processed.

In order to create NC data for the first machining process for processing the surface and the second machining process for machining the surface using an automatic programming device, an operator can use the drawings to determine the first and second machining processes based on past experience. The process was divided into processes, and data such as the finished shape was entered for each process.

For this reason, only those who were familiar with turning could create it. Additionally, data such as the finished shape had to be entered for each process, which was inefficient. This invention was invented against this technical background, and achieves the following objects.

An object of the present invention is to provide an automatic processing step division method in an automatic programming device for automatically determining the 1st and 2nd processing steps by inputting a -degree material shape and finished shape.

[Means and actions for solving the above problems] In order to solve the above problems, the following measures are taken.

This is an automatic processing process division method for automatically dividing the processing process, which includes an input process for inputting the contour line of the raw shape of the workpiece, and a finished shape input process for inputting the contour line of the finished shape of the workpiece. a step of defining an input start point for the finished shape; and a step of defining an input start point of the finished shape, and defining a position on the maximum outer diameter of the finished shape and furthest from the end face of the finished shape in the direction of the rotation axis of the workpiece to the outer diameter step. a line passing through the input start point and perpendicular to the rotation axis; and a line passing through the process division point and perpendicular to the rotation axis. A step of determining the area surrounded by
This is a method for automatically dividing machining processes in an automatic programming device, which includes a process defined as a machining process area.

Further, a preset length from the input start point is added in the axial direction to form the first machining process area and the second machining process area.
If the machining process area is determined by having an overlapping machining area that overlaps with the machining process area, the machining and finishing accuracy will be good.

To realize this method, a material shape memory area for storing the outline of the raw shape of the workpiece, a finishing shape memory area for storing the outline of the finished shape of the workpiece, and a memory area for storing the outline of the finished shape of the workpiece are required. An input start point memory area for storing an input start point, and a position that is the maximum outer diameter of the finished shape and is farthest from the end face of the finished shape in the direction of the rotation axis of the workpiece is determined as an outer diameter process division point. , surrounded by the outline of the material shape, the outline of the finished shape, a line passing through the input start point and perpendicular to the rotational axis, and a line passing through the outer diameter process division point and perpendicular to the rotational axis. a control program memory area for determining an area as a first machining process area and an area other than the above as a second machining process area; the material shape memory area; the finishing shape memory area; and an input starting point memory. An automatic processing step division device in an automatic programming device is used, which is comprised of a central processing unit that centrally controls the area and the control program memory area.

Embodiment Programming FIG. 1 is a block diagram illustrating an embodiment of the automatic progeraminking device of the present invention. Central processing unit (C
PU) 1 oversees and controls the entire automatic programming device. An input device 4 consisting of a graphic display device 3 and a keyboard device is connected to this CPU via a bus 2. The machining information memory area 5 is an area in the RAM, in which the material shape of the workpiece,
Information regarding the workpiece, such as the finished shape and input starting point, is stored in each memory area 51, 52, and 53.

The control program memory area 6 includes a control program that controls the entire automatic programming device, a program that creates NC data from information related to the workpiece stored in various memory areas, and a program 61 that divides the machining process.
This is an area in the ROM that stores necessary programs such as. The NC data output device W7 is an output means for outputting the created NC data to an external storage medium such as a paper tape, bubble cassette, or IC card.

The condition setting memory area 8 is set by an automatic programming device.
This is an area in the RAM that stores various conditions such as cutting conditions used when creating C data. The created data memory area 10 is an area in the RAM that temporarily stores input data, processing results, created NC data, and the like.

■The solid lines shown in Fig. 2 (a), (b), and (c) of "E" are half cross-sectional views showing the finished shape during turning processing. Explain according to the following.

The solid line of the arrow in FIG. 2(a) indicates the contour line of one cross section cut from the finished shape axis of the part 20 having the inner hole 21 passing through, and the outer dotted line indicates the contour line of the shape of the material 22. This shows that. The outline of the shape of the material 22 is inputted from the input device 4 in accordance with the message displayed on the graphic display W3.

The input outline of the shape of the material 22 is stored in the material shape memory area 51. Point A is the starting point for inputting the contour of the finished shape. This input starting point A is defined as a dividing point on the inner hole 21 side that distinguishes the first machining process from the second machining process. Therefore, the input starting point A on the inner hole 21 side is manually determined in consideration of this fact. However, since this inner hole 21 is a through hole, drilling the hole with a drill is performed in the first processing step.

Line segment GH1 Line segment HI, Line segment IJ, Line segment JK, Line segment KL,
Input line segment LM and @segment MA. By this input, the input starting point and the finished shape are stored in the finished shape memory area 52. When the input of the finished shape is completed, the machining process division program stored in the machining process division program memory area 61 in the control program memory area 6 is transferred to the CPU.
I to automatically determine the dividing position of the 1.2 machining process. A method of determining the division position using the machining process division program will be explained below. The process division positions are the inner hole 21 such as the starting point A between the material 22 shape and the finishing shape entry direction stored in each area 51, 52, 53 in the machining information memory area 5.
On the other hand, as described above, the input start point A is used as the dividing point. However, in actual cutting, there will be uncut parts such as the paris and nose at the boundary between the first and second machining processes. A redundant processing area 23 to be added even in the second processing step is determined.

The length l of this overlapping processing area 23 is set in advance in the condition setting memory area 8 in the automatic programming device.

The dividing point between the first machining process and the second machining process on the outer diameter side is
Automatically determined based on the following principles. The position where the outer diameter of the input finished shape is the largest, that is, the position where the X value is the largest, and the position where the Z value is the smallest, that is, the H point, is set as the dividing point. On the outer diameter side, similarly to the inner hole 21 side, the overlapping length of the first processing area 24 and the second processing area 25! is determined in advance, and this value is added.

In the end, in the first machining step 24, as shown in FIG. 2(b), the inner hole 21 side passes through point A, line segment LL parallel to the X-axis line, and the outer diameter side passes through point A (! ) and is surrounded by a line segment L2 parallel to the X-axis line and the outline of the finished shape and the shape of the material 22.The second processing region 25 is shown in FIG. 2(C). As shown in FIG.
The first machining process area 24 and the second machining process area 25 overlap to form an overlapping machining area 23.

FIGS. 3(a), (b), and (c) show other processing examples.

First, the input starting point A of the inner hole 21 is determined. what if,
When the machining start point is determined to be point A, input starts from N line segments, line segment BC1 line segment CD, arc W shadow, line segment shadow L, and line segment FA are input. The dividing points for the 1.2 machining process are determined in the same manner as in the machining example described above. That is, the inner hole 21 side is point A, and the outer diameter side is point G. As above, the Z-direction length of the overlapping processing area 23! has been determined, so the length in the Z-axis direction! The added position is defined as the first machining process area. Therefore, the 1.2 machining process areas 24 and 25 and the overlapping machining area 23 become the areas shown in FIGS. 3(b) and 3(c).

FIG. 4 shows an example with a stop six 30. Set the processing start point to point A, line segment AB, line segment BC1 line segment CD, line segment D
E, line segment EF, line segment FG...Similarly, input up to point P. In this case, since point A and point P do not intersect,
It is recognized that the inner hole is a blind hole 630. At the time of this recognition, the inner hole side has the overlapping machining area 23 as in the machining example above,
Length in Z-axis direction without adoption! Also not set. However, the outer diameter side is the length from point G, which is the maximum outer diameter! is set, and the overlapping processing area 23 is set. Therefore, the first processing region 24 becomes the region shown by diagonal lines in FIG. The second processing area is determined in the same manner as described above.

FIG. 5 is an example of processing that does not have any inner holes.

Input from input starting point A to point A. In this case, since it does not have an inner hole, an overlapping machining area 23 is added to create a finished shape.
The area surrounded by the material shape is defined as a first processing process area 24. The second processing region 25 is defined in the same manner as described above.

Flow・' FIG. 6 is a flow diagram of process division. First, input the material shape from the input device 4 of the automatic programming device (
Step P,). The input material shape is stored in the material shape memory area 51 within the processing information memory area 5. Next, the finished shape is input according to the procedure shown in the processing example above (P2). The input finished shape is stored in the finished shape memory area 52 within the machining memory area 5. In addition, the input start point of the finished shape is input in the input start point memory area 53.
is memorized. When you finish inputting the finished shape, the CPU
executes the control program 61 and starts the process division process.

If there is no need for process division (Ps), the process division process is ended (P4), and NC data is automatically created as before (P4). To determine whether this process division is necessary,
Enter it in advance.

If there is a process division, it is determined whether there is a process division designation specified by the operator.

On the other hand, when there is no process division designation input, the process division position is automatically determined based on the above principle, and the 1.2 machining process area is divided at this position. (Pl.

P's). When this division is completed, the material and finished shape are written in the creation data memory area 10 for each step of 1.2 (P9). After this, these created data memory areas 10
The material shape and the first
．． Display the finished shape of the second process on the display device 3 (P
1o).

If the operator determines that the process division position is inappropriate based on the displayed finished shape (Pl2), he or she can make corrections by inputting keyboard input from the terminal (Pl.

). When the process division process is completed, NC data is automatically created from the finished shape and material shape for each of the first and second machining steps in the same way as in the past.

[Effects of the Invention] As detailed above, since the processing area of the 1st and 2nd processing steps is automatically divided based on the input starting point, finished shape, and material shape, even a person with little processing experience can efficiently perform the 1st and 2nd processing steps. , 2 machining areas can be determined.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an overview of the NC data creation device, Figures 2 (a), (b), and (c) are diagrams showing an example of determining a process based on the finished shape and material, and Figure 3 (a). ), (b), (
c) is a diagram showing recognition when the shape has a curved surface, Figure 4 is a diagram showing an example of the finished shape of a workpiece with a blind hole, Figure 5 is a diagram showing an example without an inner hole, and Figure 6 is a diagram showing an example of the finished shape of a workpiece with a blind hole. The figure is a diagram showing an operation flow for determining a process.

Claims (1)

[Claims] 1. An automatic processing process division method for automatically dividing the processing process, which includes an input step of inputting the contour line of the material shape of the workpiece, and an input step of inputting the contour line of the material shape of the workpiece; A finished shape input step of inputting a contour line, a step of defining an input start point of the finished shape, and a step of defining a point on the maximum outer diameter of the finished shape and from the end face of the finished shape in the direction of the rotation axis of the workpiece. a step of defining the farthest position as an outer diameter process division point, and a line passing through the outline of the material shape, the outline of the finished shape, and the input start point, perpendicular to the rotational axis, and passing through the process division point. The area surrounded by the line perpendicular to the axis of rotation is the first area.
A method for automatically dividing machining processes in an automatic programming device, comprising the steps of determining a machining process area and defining an area other than the above as a second machining process area. 2. In claim 1, there is provided an overlapping machining area in which the first machining process area and the second machining process area overlap each other by adding a preset length from the input starting point in the axial direction. A method for automatically dividing a machining process in an automatic programming device, characterized by determining a machining process area. 3. A material shape memory memory area that stores the outline of the material shape of the workpiece, a finishing shape memory area that stores the outline of the finished shape of the workpiece, and an input starting point for the finished shape. The input starting point memory area and the maximum outer diameter of the finished shape and the farthest position from the end face of the finished shape in the direction of the rotation axis of the workpiece are determined as the outer diameter process division points, and the outline of the material shape is determined. A first machining process area is an area surrounded by a line, a contour line of the finished shape, a line passing through the input start point and perpendicular to the rotation axis, and a line passing through the outer diameter process dividing point and perpendicular to the rotation axis. and a control program memory area for determining an area other than the above as a second machining process area, the material shape memory area, the finishing shape memory area, an input starting point memory area, and a control program memory area. A processing process automatic dividing device in an automatic programming device consisting of a central processing unit that centrally controls the process, and an automatic programming device.