JPH0212309A - Cad/cam device - Google Patents

Abstract

PURPOSE:To easily produce the work shape data having high diversity despite the partial difference of working conditions by securing such a constitution where the working conditions can be added to each of graphic elements forming a working unit. CONSTITUTION:A selection means 4 selects the work shape data to which an attribute is added and the corresponding attribute. Then the attribute is given by an attribute adding means 5 and at the same time a decide discrimination means 6 discriminates necessity for calculation of an offset shape. A working route component graphic element production means 7 produces the working route component graphic elements. These elements are stored in a memory means 8 and at the same time a working route calculation means 9 calculates a working route. In other words, the working conditions can be applied to each graphic element. Thus it is possible to easily produce the shape data having high diversity despite the partial difference of working conditions.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a GA that creates numerical control (hereinafter referred to as NC) data from the input machining shape and machining conditions of a workpiece.
This relates to a D/CAM device.

[Prior Art] Figure 8 shows a conventional CAD/CAM device. In the figure, (21) analyzes the input shape and processing conditions to
(22) is a memory for data storage, (23) is a printer device that displays graphics and prints NC data, (24) is a N that supplies N to the NG device.
(25) is a paper tape input/output device that outputs C data on paper tape and outputs NC data, and (25) displays figures, processing conditions, and data input request messages (character strings) on the screen. A display consisting of a CRT shown above, (26) a keyboard for manually inputting the shape, machining method, tool conditions, etc. of the workpiece, and (27) the above display for displaying the shape, machining method, tool conditions, etc. of the workpiece. (25) A mouse for inputting the above, (28) is an auxiliary storage device that stores the shape, machining method, tool conditions, and NG data, and is connected to each of the above devices (21) to (27) via a bus (29). has been done.

Next, the operation of the conventional CADZCAM device will be explained.

When the processing mode is the shape data definition mode, various data are read from the keyboard (26), mouse (27) and auxiliary storage device (28), and sent to the CPU (21) via the bus (2g). , the process is branched depending on the combination of input data, and each shape data such as a point, line, circle, etc. is created. Each created data is sent to the memory (22) via the bus (29) and stored. be done. The above shape data creation process is repeated until all processed shape data of the workpiece is created.

Next, when the processing mode is the machining method definition mode, various data read from the keyboard (26), mouse (27), and auxiliary storage device (28) are stored for each machining unit, such as machining starting point, approach, etc. It is regarded as machining conditions such as path, machining feed rate, machining method (mountain machining, valley machining, etc.), tool diameter, etc., and is changed into an internal representation format and stored in the memory (22). Thereafter, when a command to output NG data is read from the keyboard (26) or mouse (27), machining shape data and machining conditions are read from the memory (22), and NG data creation processing is performed.

[Problem to be solved by the invention]

With conventional CAD/CAM equipment as described above, machining conditions can only be added for each machining unit.
As shown in the figure, in the case of a workpiece that has to be machined by partially changing the machining conditions, it takes time to define the machining shape, and if you want to change the tool diameter, you have to define the machining shape again. There were problems such as having to redo it.

That is, in order to process the workpiece shown in FIG.
As shown in Figures 10(a) to (d), there are three areas (1
It is necessary to process them separately into 01), (102), and (10:l).
) It is necessary to move the center of the tool to the shaded area shown in ). However, three areas (101), (102), (103
) It is not possible to use the same shape data for all machining processes, so the machining shape must be defined for each machining unit, taking into account the offset value due to the tool diameter.

In addition, in FIGS. 11(a) to (C), the broken line indicates the 10th
The ridge lines corresponding to Figures (a) to (d) are shown, and Figure 11 (a)
) is the region (111) in Figure 1O (a) to (d).
The machining shape for machining 01), (
112) is the region (102) in FIGS. 10(a) to (C)
The machining shape for machining, (113
) respectively show the machining shapes for machining the regions (103) in FIGS. 10(a) to (d). In particular, the machining shape (112) shown in FIG. 11(b) has different offset values for each shape element composing the machining shape, so the conventional method of setting machining conditions for each machining unit cannot It is impossible to automatically calculate the machining path for machining (112).

This invention was made to solve this problem, and is a CAD/
The purpose is to obtain a CAM device.

[Means for Solving the Problems] The CAD/C8M apparatus according to the present invention is provided with a machining shape data storage means for storing each of the machining shape data of a workpiece that is divided into a plurality of machining shapes. , an attribute storage means for storing the attributes of a predetermined shape element among the plurality of shape elements constituting each of the machining shapes, a tool diameter storage means for storing the diameter of a tool for machining the workpiece, and the machining shape. Selection means for selecting machining shape data to which an attribute is to be added from the data storage means, and selecting an attribute corresponding to the selected machining shape data from the attribute storage means;
Attribute addition means for adding an attribute to a predetermined processing element based on the human power from the selection means; Discrimination means for determining whether offset shape calculation is necessary based on the input from the attribute addition means; and the attribute addition means , a machining path constituent graphic element creating means for creating a machining route constituent graphic element by offsetting a predetermined shape element by the amount of the tool and using other shape elements as they are, based on each input from the tool diameter storage means and the determining means; , a storage means for storing created machining path constituting graphical elements for each piece of machining shape data, and a machining path calculation means for calculating a machining path based on the stored contents of the storage means.

(Operation) In this invention, the selection means selects the machining shape data to which an attribute should be added and the corresponding attribute, the attribute addition means adds the attribute, and the determination means determines whether offset shape calculation is necessary or not. is determined, and a machining route constituting graphic element is created by the machining route constituting graphic element creation means. The machining path constituting graphical elements are stored in the storage means, and the machining path calculation means calculates the machining path based on the stored contents. That is, processing conditions can be added to each graphical element.

Therefore, even if other processing conditions change, the same shape data can be used.

(Embodiment) FIG. 1 is an overall configuration diagram showing an embodiment of a CAD/CAM device according to the present invention. As is clear from FIG. 1, this embodiment includes a machining shape data storage means (1) for storing each of the machining shape data of a workpiece that is divided into a plurality of machining shapes, and each of the machining shapes described above. An attribute storage means (2) for storing attributes of a predetermined shape element among a plurality of shape elements constituting a shape, and a tool diameter storage means (3) for storing the diameter of a tool for machining a workpiece are provided, and selection is possible. In the means (4), machining shape data to which an attribute is to be added is selected from the machining shape data storage means (1), and an attribute corresponding to the selected machining shape data is selected from the attribute storage means (2). be done.

Then, based on the input from the selection means (4), an attribute is added to a predetermined processing element in the attribute adding means (5), and based on the human power from the attribute adding means (5), an attribute is added to the predetermined processing element by the determining means (6). ), it is determined whether offset shape calculation is necessary or not, and processing path configuration graphic element creation means (7)
In this step, the predetermined shape element is offset by the tool diameter based on the inputs from the attribute addition means (5), the tool diameter storage means (3), and the determination means (6), and
A machining path constituting graphical element is created using other shape elements as they are, and the created machining path constituting graphical element is stored in the storage means (8), and based on the stored contents, the machining path calculation means (9 ) is configured to calculate the machining path.

Figure 2 shows the CAD/CAM used in the embodiment of Figure 1.
It is a hardware configuration diagram of the apparatus, and in the figure, the same reference numerals as in FIG. 8 indicate the same or corresponding parts.

(21a) is a CPU that executes the processing shown in FIG.
.

(22a) is a memory that stores processing conditions added to each graphical element.

Next, the operation of the above embodiment will be explained with reference to the flowcharts of FIGS. 3 to 5. Figure 's3 is a flowchart showing the flow of the overall operation, Figure 4 is a flowchart when adding a mountain machining attribute or valley machining attribute, and Figure 5 is a flowchart when the mountain machining attribute or valley machining attribute is added. It is a flowchart when calculating a route.

First, in FIG. 3, in step (31), the current state of the machined shape is displayed on the display (25). This step (31) always displays the last state on the display (2) during each process.
If the process to display in 5) is performed, C can be omitted.

Next, in step (32), wait for a processing menu (shape definition, machining condition addition, NC data output processing, etc.) to be selected, and once the menu is selected, in step (33),
It is determined whether machining conditions are to be added or not. If the machining condition addition mode is selected, machining condition addition processing is performed in steps (34) and (35), and if not, N is selected in step (36).
Determine whether the mode is C data output processing mode. And N
In the case of C data output processing mode, step (37)
NC data output processing is performed at step (38), and if not, each menu processing is performed at step (38). Each menu process in this step (38) is the same as the conventional one, and when the process corresponding to each menu is completed, the process returns to step (31) again, and one of the menus, process end, is executed. The process shown in FIG. 3 is repeated up to this point.

By the way, in the machining condition addition process, the process branches depending on which machining condition is selected from the menu, and in step (34), the machining shape data to which the machining condition is to be added is selected, and the necessary machining condition parameters are read. Let's do it. The machining shape is specified using the mouse (27), and parameters are read using the mouse (27), keyboard (26), and auxiliary storage device (2B). When all necessary data has been read, the machining condition type and parameters added in step (35) are converted into an internal representation format, and stored in memory (22a) in correspondence with the machining shape data to which machining conditions have been added. Store.

Next, the machining condition addition procedure will be specifically explained with reference to FIGS. 4 and 6, taking the mountain machining attribute or the valley machining attribute as an example.

It is assumed that the machining shape shown in FIG. 6(a) is displayed on the display (25) and the machining attribute is a mountain attribute. First, the fourth
In step (41) shown in the figure, a position slightly distant from the shape element to which an attribute is to be added is indicated with the mouse (27), and the coordinate values indicated with the mouse (27) are determined. FIG. 6(b) shows a shape element selection method in the case of adding a mountain processing attribute to the right side of the shape element Ll.

Next, in step (42), the shape data closest to the coordinate value checked with the mouse (27) is obtained, and in step (4)
In 3), it is determined which side (right or left) the coordinate value checked by the mouse (27) is on when viewed from the direction from the starting point to the ending point of the shape element. Then step (
In step 44), data indicating which side the mountain processing attribute is added to is added to the shape element L1. At this time, a mark indicating the machining conditions added together with the shape element may be displayed. FIG. 6(C) shows an example in which a mountain processing attribute is added to the shape element L1.

Next, the machining path calculation process when a mountain machining or valley machining attribute is added to each shape element will be described with reference to FIGS. 5 and 7.

It is assumed that machining attributes are added as shown in FIG. 7(a), and the order of machining shape elements is Lll, L12, L1.
3. In L14, processing attributes as shown in FIG. 7(b) are added. First, step (5) in Figure 5
In step 1), the tool diameter data is retrieved and the shape data storage area where the machining conditions were finally determined is initialized.

Next, in step (52), the machining shape data constituting the machining unit is read in order, and it is determined in step (53) whether or not processing has been completed for all the machining shape data. If the machining shape data cannot be completed, the mountain machining attribute or the valley machining attribute is extracted in step (54), and the process is performed in step (55).
), it is determined whether an attribute is added to the read machining shape data.

If an attribute is added, in step (5a), the added attribute type and direction are extracted, and an offset shape taking the tool diameter into consideration is calculated. Specifically, if the retrieved attribute type is a mountain attribute, the tool path will be a constituent geometric element that is offset by the tool diameter on the opposite side to the specified direction, and if it is a valley attribute, the specified shape data will be used as is. It is used as a constituent graphical element of the machining path. On the other hand, if no attribute is added, in step (57), the machining shape data is used as it is as a machining route constituent graphic element.

Next, in step (58), the intersection point between the previously determined machining path component graphic element and the graphic element determined in step (5B) or (57) above is calculated, and the direction is set to The end point is the starting point of the current configuration graphical element. Thereafter, in step (59), the constituent graphic elements obtained this time are copied to the previous constituent graphic element storage area.

Repeating the above steps (52) to (59) until it is determined that the shape data is completed in step (53),
If it is determined in step (53) that the process has ended, in step (60), an intersection point is calculated between the final shape and the first shape, and the tool path calculation process is ended.

In the case of FIG. 7, the tool path shown in FIG. 7(C) is automatically calculated from the data in FIGS. 7(a) and 7(b).

(Effects of the Invention) As explained above, this invention is configured so that machining conditions can be added to each graphical element constituting a machining unit. Also, there are effects such as being able to easily create machining shape data with high reusability.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a CAD/CAM device showing an embodiment of the present invention, FIG. 2 is a hardware configuration diagram thereof, and FIG.
Figures 5 to 5 are flowcharts showing the operation, and Figure 6 (
a) to (C) are explanatory diagrams showing machining attribute addition processing, M7 figures (a) to (C) are explanatory diagrams showing a method for automatically calculating machining paths, and Fig. 8 is an explanatory diagram showing a conventional CAD/CAM device. 2 is a corresponding view, FIG. 9 is a perspective view showing an example of a workpiece, and FIG. 10 (
a) is an explanatory diagram of the machining area when the workpiece in Figure 9 is viewed from above; Figure 10 (b) is an explanatory diagram of the machining area when the workpiece in Figure 9 is viewed from the (i) direction; Figure 10(c) is an explanatory diagram of the machining area when the workpiece in Figure 9 is viewed from the (if) direction.
Figure o (d) is an explanatory diagram of the machining area when the workpiece in Figure 9 is viewed from the (ili) direction, and Figures 11 (a) to (c) are the 10th
FIG. 4 is an explanatory diagram showing each machining shape corresponding to the machining area shown in FIGS. (a) to (d). (1)... Machining shape data storage means, (2)... Attribute storage means, (3)... Tool diameter storage means, (4)...
- Selection means, (5)... Attribute addition means, (δ)...
Discrimination means, (7)... machining route constituent graphic element creation means, (8)... storage means, (9)... machining route calculation means. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Masu Oiwa 1st Figure 2 Figure 5 Figure 1 (a) Figure (a) (b) (C) r--------- -----Co'------, -----J 6. Contents of amendment (1) The statement "r (21) to (27) and f" on page 3, line 8 of the specification (21) to (28) are corrected as ". (2) "Keyboard (26
) or mouse (27)” instead of “keyboard (27)”.
6), mouse (27) and auxiliary storage device (from 28)
and correct it. (3) The statement "attributes are selected" on page 7, line 16 of the specification is corrected to "attributes are selected." (4) On page 13, line 15 of the specification, the statement ``unless the machining shape data can be obtained as a muntin" is corrected to ``unless the machining shape t data is completed." or more (voluntary)

Claims (1)

[Claims] A machining shape data storage means for storing each of the machining shape data of the workpiece to be machined in a plurality of machining shapes; attribute storage means for storing attributes;
The machining shape data to which an attribute is to be added is selected from the tool diameter storage means for storing the tool diameter for machining the workpiece and the machining shape data storage means, and the machining shape data is added to the selected machining shape data from the attribute storage means. a selection means for selecting a corresponding attribute; an attribute addition means for adding an attribute to a predetermined processing element based on input from the selection means; and a determination as to whether offset shape calculation is necessary or not based on input from the attribute addition means. Based on the inputs from the determining means, the attribute adding means, the tool diameter storage means, and the determining means, a predetermined shape element is offset by the tool diameter, and other shape elements are used as they are to create a machining path configuration figure. A machining path configuration graphical element creation means for creating elements, a storage device for storing the created machining path configuration graphical elements for each machining shape data, and a machining path for calculating a machining path based on the stored contents of this storage device. A CAD/CAM device comprising: calculation means.