JPH05134730A - System for displaying working line on three-dimensional image and generating development in cad/cam - Google Patents

Abstract

PURPOSE:To display the welding line of a product, a cut line, a bending line, etc., on a three-dimensional image and also to automatically generate a development by providing an arithmetic part for calculating the generation of the working line and the arithmetic part for generating the development. CONSTITUTION:When the curved line being a designating command is inputted by a cursor, etc., at the time of displaying the four periphries of the base surface 360 of a solid 350 as a bending line, for example, the designated line is changed into the previously prescribed kinds of line and it is displayed that the line is the bending line 310 by a broken line, for example. In the case of the cut line, two points are indicated by the movement of the cursor, etc., and the command is inputted so that the cut line 320 is generated on the upper surface, for example. When the solid 350 which is displayed by the bending line 310 and the cut line 320 is automatically extended, the base surface 360 of the solid 350 is designated as the reference surface f after the command is inputted. The material and plate thickness of the solid 350 are inputted so that correcting quantity is automatically calculated and the development 400 of the flat surface is automatically developed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for displaying a welding line, a cutting line and a bending line on a three-dimensional solid model in a CAD / CAM system for creating a design / machining program on a workstation.

[0002]

2. Description of the Related Art CAD / CAM for designing machine parts and creating NC machining programs with the aid of a computer using an engineering workstation
The system is widespread. In the CAD / CAM system, parts are designed on the screen of the workstation, but the shape and dimensions of the parts are specified on the two-dimensional screen. Furthermore, on the two-dimensional screen, the shape of the part,
When a three-view drawing including a front view, a plan view, and a side view defining dimensions is completed, a computer can calculate a three-dimensional stereoscopic image (3D solid model) based on the three-view drawing and display it on the screen. It is possible.

[0003]

However, in the conventional system, although the solid model can be displayed on the screen, the welding line, the cut line, and the bending line cannot be displayed on the solid model. There wasn't. The present invention provides a system for displaying a welding line, a cutting line, and a bending line on a solid model to facilitate cutting and assembling of a sheet metal wire, and a system for creating a development drawing by automatic expansion.

[0004]

CAD / CAM of the present invention
A system for displaying machining lines on a three-dimensional image and developing a development view is a central processing unit of an engineering workstation, a main processing unit connected to the central processing unit via a bus line, a keyboard having a mouse, CRT
A control unit having a screen, a control unit having a plotter,
Data memory for two-dimensional drawings, data memory for three-dimensional images, database for storing data necessary for generation of machining lines, database for storing data on bending information of plate materials, and operation for calculating generation of machining lines And a calculation unit that creates a developed view.

[0005]

Function: Cut lines (welding lines) and bending lines can be displayed on the three-dimensional image, and a development view is also automatically created.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram showing a process on a workstation for displaying a dimension line on a solid model according to the present invention. On the screen 100 of the workstation, a part indicated by reference numeral 200 is displayed as a two-dimensional drawing (2D drawing). The two-dimensional drawing includes a front view 202, a plan view 204, and a side view 206. By operating the workstation, a three-dimensional window (3D window) 150 is opened in the screen 100, and the solid model 200 of the component is displayed in the 3D window 150. Hereinafter, various operation processes for the solid model are executed in the 3D window 150. FIG. 2 shows a case where an edge portion of a product displayed as the solid model 300 is displayed as a bending line. When the product line l ₁ is designated by a cursor or the like and a command is entered, the designated line is changed to a predetermined line type, and it is displayed that the line is a bending line. In the illustrated embodiment, the broken line is used as the line type for displaying the bending line.

FIG. 3 shows a case where cut lines (welding lines) are displayed on a solid model. A cut connecting the _two points P ₁ and P ₂ to the upper surface 305 by specifying _two points P ₁ and P ₂ on the upper surface 305 having the opening 302 of the product 300 by moving a cursor and inputting a command. Generate line 320. In this example,
The cut line is shown as a solid line, but you can specify another line type. Since the cut line is also a weld line, the line l ₂ is specified similarly to the bending line, and the cut line (welding line)
Can be displayed as FIG. 4 shows a completed solid 35 represented by bend lines 310 and cut lines 320.
Indicates 0. Next, a procedure for automatically expanding the solid 350 based on the cut line and the bend line will be described. After inputting the command of automatic expansion, the bottom surface 360 of the solid 350 is designated as the reference surface f ₁ . By inputting the material and plate thickness of the solid, the bending correction value is automatically calculated from the data such as the bending angle, and is automatically expanded around the reference plane f ₁ to display the plane development view 400. ..

5 to 8 show the flow of the above-mentioned processing. The process started in step 1000 is step 1
A solid is created by inputting a command in 030, a solid name is input in step 1010, the solid file is read in step 1020, and the solid model is displayed on the CRT screen in step 1040. When the cursor is moved using the mouse or the like in step 1050 and a line close to the cursor is designated from the keyboard, the line designated in step 1060 is recognized, and the line designated in step 1070 is displayed in a different color.
When the command is input in step 1080, the designated line is changed to a broken line and displayed as a bending line. Next, when a cut line is displayed, the first point close to the cursor is designated in step 1100, the point is recognized in step 1110, and the point designated in step 1120 is displayed. Second step similar to cursor
When a command is input in step 1130, the two points are connected by a solid line and a cut line is displayed in step 1140.
In step 1150, it is determined whether there is another processing request,
In step 1160, it is determined whether there is an automatic expansion request.

If there is a request for automatic expansion, step 117
Go to 0. FIG. 7 shows the flow of automatic expansion. In step 1171, an automatic expansion command is input, in step 1172 the solid reference plane is specified using the mouse, and in step 1173 the material and plate thickness are input. The display method is calculated in step 1175 using the data from the bend information file provided in step 1174,
In step 1176, a development view is displayed on the CRT screen. After entering the dimensions in the exploded view in step 1177,
Proceed to step 1180. In step 1180, it is determined whether or not the solid is copied to 2D, and if copying is necessary, the process proceeds to step 1190.

FIG. 8 shows a flow of copying. A command is input in step 1191 and a display position on the two-dimensional drawing is designated in step 1192. Step 11
At 93, the solid is displayed on the two-dimensional drawing on the CRT, and the routine proceeds to step 1200. In step 1200, it is determined whether or not to output the drawing to the plotter. If necessary, in step 1210, the drawing is output to the plotter, and then step 1220.
Check whether or not to register the solid model in which the bending line, cutting line, and welding line are displayed in the solid file. When the registration is instructed, the registration in the solid file is executed in step 1230. In step 1240, it is determined whether or not to register the drawing file. If necessary, the registration is executed in step 1250, and the process ends in step 1260.

FIG. 9 is a block diagram of this system. Central processing unit of engineering workstation 10
Is a main operation unit via a bus line 12, a keyboard 16 having a mouse, a CRT control unit 18 having a CRT screen 100, and a plotter control unit 2 having a plotter 22.
0, drawing file data memory 30, solid file memory 32, database 34 of each line, bending information database 36, generation calculation unit 40 of each line, development drawing calculation unit 42. Then, this system has the following functions in order to achieve the above-described processing. (1) Read a file from solid file data and display it on the CRT by CRT control. (2) Command input and cursor movement are performed using the keyboard (mouse). (3) Each line is displayed on the CRT and maintained as solid data. (4) The generation calculation unit of each line calculates the generation method and generation position of each line corresponding to the display pattern. (5) The development drawing creation calculation unit automatically expands the solid on which the welding line and the bending line are displayed. In addition, the bending correction is calculated from the bending coefficient database, and a developed view is created and displayed. (6) The created development view or the solid copied in 2D is registered in the drawing data. (7) Output the solid or development view copied in 2D to the plotter.

[0012]

INDUSTRIAL APPLICABILITY As described above, the present invention has CAD / CAM.
In the system, a window can be provided in a two-dimensional screen to generate a three-dimensional image, and various lines such as cut lines, welding lines and bending lines can be displayed on the three-dimensional image. Therefore, the shape of the product, the bending process, and the welded part can be surely grasped, work mistakes can be prevented, and productivity is improved. Further, since it is possible to automatically create a development view centering on the reference plane, it is possible to easily create a program for processing a plate material or the like.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a procedure for displaying various lines on a three-dimensional image.

FIG. 2 is an explanatory diagram showing a display of bending lines.

FIG. 3 is an explanatory diagram showing display of cut lines and weld lines.

FIG. 4 is an explanatory diagram showing development drawing creation.

FIG. 5 is a flow chart of processing.

FIG. 6 is a flowchart of processing.

FIG. 7 is a flow chart of automatic deployment.

FIG. 8 is a flow chart of copying a three-dimensional image to a two-dimensional screen.

FIG. 9 is a block diagram of the system.

[Explanation of symbols]

10 Central processing unit of engineering workstation 14 Main operation unit 40 Generation operation unit of each line 42 Development drawing creation operation unit 100 CRT screen 150 Three-dimensional window 200 Three-dimensional image 310 Bending line 320 Cut line 400 Development view

Claims (2)

[Claims] 1. A central processing unit of an engineering workstation, a main processing unit connected to the central processing unit via a bus line, a keyboard having a mouse, and C
Regarding a control unit having an RT screen, a control unit having a plotter, a data memory for a two-dimensional drawing, a data memory for a three-dimensional image, a database for storing data necessary for generating a machining line, and bending information for plate materials Display and development of machining line on three-dimensional image in CAD / CAM, NC machining program including database for storing data, computation unit for computing generation of machining line, and computation unit for creating development diagram Creation system. 2. A step of displaying a two-dimensional image of a product on a CRT screen, a step of opening a window for a three-dimensional image in a part of the screen, a step of generating a three-dimensional image of the product in the window, and a tertiary process. The process of designating the line of the original image, the process of displaying the designated line as a bending line or the line showing cutting and welding, the process of designating two points of the three-dimensional image, and the cutting between the designated points The CAD / CAM according to claim 1, further comprising: a step of displaying as a line indicating welding, a step of designating a reference plane in a three-dimensional image, and a step of developing a three-dimensional image centered on the designated reference plane. A system for displaying machining lines on a three-dimensional image, a development view, and an NC machining program.