JPH05134729A - System for displaying dimension and parts number on three-dimensional image in cad/cam - Google Patents

Abstract

PURPOSE:To easily understand a drawing by displaying data on a three- dimensional image when the design of a product, etc., is executed through the use of CAD/CAM. CONSTITUTION:The two-dimensional drawing of the product 200, which consists of a front elevation 202, a plan 204 and a side elevation 206, is displayed on the screen 100 of a CAD/CAM system. A window 150 for a three-dimension is opened on the screen 100 and the three-dimensional image of the product is displayed. Dimension between two points, the angle of a line or a face which intersects and the radial of a circle are displayed on the three-dimensional image. The three-dimensional image of the product is divided into parts so as to display a parts number and also a parts table is automatically generated.

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 dimension line and a part number 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 solid model and dimensions are displayed, or the part number forming the solid model is displayed. Etc. could not be displayed on the solid model. The present invention provides a system capable of displaying a dimension line and a part number on a solid model.

[0004]

CAD / CAM of the present invention
The dimension display system for a three-dimensional image in 3D includes 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 a control unit having a CRT screen. , A data memory for storing a file of a three-dimensional image, a database for storing data necessary for generating a dimension line, a computing unit for computing a pattern of dimension line generation, a data memory for a two-dimensional drawing, and a control having a plotter And a section. The part number display system includes 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 a control unit having a CRT screen.
A control unit having a plotter, a data memory for storing a three-dimensional image file, a data memory for storing a two-dimensional drawing file, a database for storing data necessary for displaying a part number, and a part number display An arithmetic unit, a database that stores data necessary for displaying the parts table, and an arithmetic unit that calculates the generation pattern of the parts table display are provided.

[0005]

With this system, it is possible to display dimensions in a three-dimensional image, display a part number, and copy to a two-dimensional drawing in the window for a three-dimensional image opened on the CRT screen. it can.

[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 part is displayed in the 3D round 150. Thereafter, various size display operation processes for the solid model are executed in the 3D window 150.

FIG. 2 shows a process for displaying the dimension between two designated points of the solid model 210. Bring the cursor 105 close to the plane f ₁ and the points P ₁ and P ₂ and solid model 2
A mark is displayed by designating a surface f ₁ having 10 points and by designating _two points P ₁ and P ₂ . When the cursor 105 is moved to the point where the dimension is to be displayed and the command for displaying the dimension line is entered, the leader line 212 and the dimension line 214 are displayed on the specified face f ₁ , and the dimension S is displayed along the dimension line 214. To be done. The drawing angle and the drawing length of the dimension line are calculated based on the database, and the dimension N
Is given from a 2D drawing.

FIG. 3 shows a process of displaying the angle dimension on the solid model 220 having six intersecting two surfaces. As the display position of the angle, the edge line of the intersecting faces or the center of the line formed by the intersecting faces can be selected. When displaying the edge lines intersecting surfaces, it specifies two lines l _1, l ₂ of the solid model 220, the designated line l _1, l ₂
When the cursor 105 is moved to the dimension display point and the angle dimension display command is input, the dimension line 222 for angle display connecting the lines l ₁ and l ₂ is displayed, and the angle dimension S is displayed along the dimension line 222. To be done. Line 2 made by intersecting surfaces
When displaying the angle in the middle of 25, line 2 intersects
A point P ₁ is specified on the point 25, and two faces f ₁ and f ₂ are specified. Cursor 10 at display point P ₁
If you move 5 and enter a command, the intersecting line 225
A line 226 is displayed perpendicularly to, and a dimension line 227 indicating an angle is displayed. The angular dimension S is the dimension line 22.
It is displayed along with 7.

FIG. 4 shows a case where the diameter dimension of the circle 240 of the solid model 230 having the circle (hole) 240 is displayed. The display can be selected from three types of display methods. First, the cursor is brought close to the circle 240 and the circle 240 is designated. Move the cursor 105 into the circle 240 that is the display point,
When you enter the command, the dimension line 242 is directly attached to the circle 240.
Is displayed, and the dimension S is displayed along the dimension line 242. When the cursor 105 is moved above the circle 240 and a command is input, a leader line 244 indicating the diameter is drawn upward from the circle 240, and the dimension S is displayed along the dimension line 245 connecting the leader lines 244. When the cursor 105 is moved to the obliquely upper portion of the circle 240 and a command is input, a leader line 247 is drawn from the center of the circle 240, and the dimension S
Is displayed. FIG. 5 shows a case where the diameter dimension is displayed on the cylindrical solid model 260. Solid model 260
A circle 262 is designated at an arbitrary position close to the cursor 105. When the cursor 105 is moved to a display point near the circle 262 and a command is designated, a leader line 266 and a dimension line 267 are displayed, and a dimension S is displayed along the dimension line 267.

FIG. 6 to FIG. 9 show the flow of the control processing of the dimension display described above. The process started in step 1000 creates a solid model from the drawing by inputting a command 1030, or inputs a solid name in step 1010, reads the corresponding solid from the solid file in step 1020, and displays it on the screen in step 1040. To do. Hereinafter, the corresponding process is started depending on the type of the displayed size. When displaying the dimension between two points, the process proceeds to step 1100 and the process shown in FIG. 7 is executed. In step 1102, the cursor is brought close to the surface designated by the solid with the mouse, and in step 1104, a surface designation command is input. In step 1106, the surface close to the cursor is read from the solid model, and step 11
The surface designated by 08 is highlighted to show the mark. Move the cursor to the first point in step 1110,
In step 1112, a point designation command is input. In step 1114 the point near the cursor is read from the solid model and in step 1116 the point is marked.

Next, at step 1118, the cursor is moved to the second position.
When a point designation command is input in step 1120, the point close to the cursor is read from the solid model in step 1122, and the point is marked in step 1124. When the command for displaying the dimension line is input in step 1128, the distance between the two points is calculated in step 1130, and in step 1140 the display pattern of the leader line and the dimension line is calculated using the dimension line database given in step 1142. In step 1144, the dimension line and the dimension are displayed. Then, step 1400 of FIG.
Go to. If you want to display the angular dimensions, step 12
Proceed to 00. When displaying the angle between two lines in the angle display, the cursor is moved to the first line with the mouse in step 1202, and the line designation command is input in step 1204. The lines are read from the solid model. Step 12
Mark the line specified by 08 by highlighting it. With respect to the second line, the processes from step 1202 onward are repeated and the process proceeds to step 1240. When displaying the angle of the intersecting planes, the cursor is brought close to the point to be displayed in step 1222, and the point is specified in step 1224.
In step 1226, the point close to the cursor is read from the solid model, and in step 1228 the point is marked.

At step 1230, the cursor is brought close to the first surface, the surface at step 1232 is designated, and at step 123.
In step 4, the surface close to the cursor is read, and in step 1236 the surface is marked. Step 12 for the second side
The processes of 30 and below are repeated and the process proceeds to step 1240.
Move the cursor to the display point in step 1240,
When the angle dimension display command is input in step 1242, the angle dimension is calculated in step 1244. In step 1246, the display pattern is calculated based on the dimension line database supplied in step 1248, the angular dimension is displayed in the solid model in step 1250, and the process proceeds to step 1400.

If the diameter or radius of the circle is to be displayed, the process proceeds to step 1300. Step 1
At 302, the cursor is moved closer to the circle, and at step 1304, a circle designating command is input. In step 1306, the circle near the cursor is read, and in step 1308 the circle is highlighted. In step 1310, the cursor is moved close to the display point, a radius dimension or diameter dimension display command is input in step 1312, and the radius or diameter is read from the solid model in step 1314. In step 1316, the display pattern is calculated according to the data from the database 1318, the diameter dimension is displayed in step 1320, and the process proceeds to step 1400.

Returning to the flow of FIG. 6, in step 1400, it is confirmed whether or not there is another dimension display request, and in step 1410.
Then, it is determined whether or not the solid is copied to the two-dimensional screen (2D). When copying is performed, a command is input in step 1420, and a 2D display point is designated in step 1430. In step 1430, the solid is displayed in 2D, and in step 1450, it is asked whether to output the drawing to the plotter. If there is an output instruction, the command is input in step 1460 and step 147
When 0, the drawing is output to the plotter. Step 1480
Is registered in the screen file in step 1490, is registered in the solid file in step 1490, and the process ends in step 1500.

FIG. 10 is a block diagram of the system. The CPU 10 of the engineering workstation for CAD / CAM uses the bus line 12 for the main calculation unit 14, the CRT control unit 16, and the dimension line generation calculation unit 1.
8, solid file data 20, keyboard 22, dimension line database 24, drawing file data memory 2
6, and is connected to a control unit 28 having a plotter 30 and the like. (1) The main calculation unit 14 calculates dimensions and angles from the solid and recognizes the shape, and the solid file data 20
The file is read in and displayed on the CRT by CRT control. (2) The keyboard 22 has a mouse for command input and cursor movement. The dimension line is displayed on the CRT and is maintained in the solid file data. (3) The dimension line generation calculation unit 18 calculates the generation method and the generation position of the dimension line corresponding to the display pattern.

FIG. 11 is an explanatory diagram showing the processing on the workstation for displaying the part number line on the solid model according to the present invention. Workstation screen 1
On 00, a product indicated by reference numeral 300 as a whole is displayed as a two-dimensional drawing (2D drawing). Two-dimensional drawing is front view 3
02, a plan view 304, and a side view 306. By operating the workstation, a three-dimensional window (3D window) 150 is opened in the screen 100, and the solid model 300 of the product is displayed in the 3D window 150. Thereafter, in the 3D window 150, the operation process of displaying the part number for the solid model is executed. FIG. 12A shows a process of assigning a part number N to each part that constitutes the solid model 300. The part number N is displayed by a circled number, a code, or the like at the tip of the lead line drawn from each part. A circle is attached to the tip of the leader line, so it is called a balloon display because of its shape. FIG. 12B shows a state in which the parts table 310 is displayed at the bottom of the screen 100. In the parts table 310, for example, the product name and the number of parts corresponding to the part number are described. In addition, the material of the parts,
You can also fill in information such as the place of purchase. 12
As shown in (C), if necessary, a three-dimensional view of the product including the solid model 300 with a part number and the parts table 310 is copied as a two-dimensional drawing.

FIG. 13 and FIG. 14 show the operation procedure of the process of displaying the part number. The product 320 has three parts 322,
324, 326. A part 32 that displays a part number after specifying a solid in the 3D window
The second face f ₁ is designated. The point P ₁ is designated in the plane f ₁ , the cursor 105 is moved to the display point, and the point designation command is input. The part display line 332 is drawn from the point designated by the cursor 105 to the point P _{1 on the} surface f ₁ . The arrow at the tip of the part display line 332 points to the point P ₁ on the surface f ₁ , and the part number N is displayed in a circle 330 at the rear end of the part display line 332. The part number N is displayed in parallel with the designated surface f ₁ .

FIGS. 15 to 17 show the flow of the control processing for displaying the part number described above. The processing started in step 3000 creates a solid model from a drawing by inputting a command 3030, or inputs a solid name in step 3010, reads the corresponding solid from a solid file in step 3020, and displays it on the screen in step 3040. indicate. In step 3050, the presence or absence of a request for another solid is checked.
Proceeding to step 3060, the mouse attached to the keyboard is used to bring the cursor close to the solid. Step 30
At 80, the solid close to the cursor is read from within the 3D window, and at step 3090 the solid is highlighted to distinguish it from other solids. In step 3100, the cursor is brought close to the designated surface, and in step 3110 a surface designation command is input.

In step 3120, the surface close to the cursor is read from the solid, and in step 3130 the surface is highlighted. In step 3140, the cursor is brought close to the point on the designated surface, and in step 3150, point designation is instructed. A point near the cursor is read from the solid in step 3160, and registered in the solid file in step 3170. In step 3180, it is checked whether or not there is a request to display a part number for another part, and if there is a request, the process returns to step 3060 and the above steps are repeated. If there is no request, the request for displaying the parts table is checked in step 3190, and if there is a request, step 3200
The command for creating a parts table is input with. Step 322
At 0, the solid part number and quantity are read based on the data sent from the solid file database.

In step 3230, the position for displaying the parts table on the two-dimensional drawing is commanded, and in step 3240, the parts table is displayed. In step 3250, it is registered in the drawing file. In step 3260, after moving the cursor to the designated point on the surface of the solid to mark the designated point, step 327
Move the cursor to the balloon display point where the part number is entered with 0, and enter the part number display command. Based on the data from the solid file in step 3300,
The part number of the designated solid is read in step 3290, the balloon display pattern is calculated in step 3330 based on the command from the database in step 3320, and the part number is displayed in step 3330.

In step 3340, it is checked whether or not the solid is copied to the 2D drawing.
Enter the command in step 3350 and step 336
Specify the display point on the 2D drawing with 0, and step 33
Display the solid on the 2D drawing at 70, step 338.
0 is registered in the drawing file. In step 3390, it is checked whether or not the drawing is output to the plotter, the command is input in step 3400, the drawing is output to the plotter in step 3410, and the process ends in step 3420.

FIG. 18 is a block diagram of this system. The CPU 10 of the engineering workstation for CAD / CAM uses the bus line to perform the main calculation unit 14, the CRT control unit 16, the balloon display generation calculation unit 38,
It is connected to the plotter control unit 34, the drawing file data 30, the solid file data 20, the keyboard 22, the balloon display database 32, the parts table display generation calculation unit 40, the parts table display database 42, and the like. This system achieves the following processing. (1) The main calculation unit 14 calculates the type and quantity of solids in the 3D window. (2) The balloon display generation calculation unit 38 calculates a balloon display method and a generation position. The keyboard 22 has a mouse, and the balloon display for command input and cursor movement is CR
Solid file data 20 while being displayed on T
Be maintained at. (3) A parts table is displayed on the drawing and is maintained in the drawing file data 30. (4) Use the plotter 34 to draw the drawing showing the parts list.
Can be output with.

[0023]

INDUSTRIAL APPLICABILITY As described above, the present invention has CAD / CAM.
In the system, a window is provided in a two-dimensional screen to generate a three-dimensional image, and dimensions are displayed on the three-dimensional image. Since the dimensions are automatically calculated and output, it is possible to easily find dimensional errors in the design drawing. By copying the three-dimensional image on which the dimensions are displayed on the two-dimensional drawing, it becomes easy to confirm the shape and dimensions of the product, and it is possible to appropriately give instructions to the manufacturing process. Also, mistakes at the manufacturing site can be prevented. Further, since the part numbers of the product are displayed on the three-dimensional image, the structure of the product can be easily understood and mistakes in assembly can be prevented. The bill of materials can also be created automatically, reducing the number of drafting processes.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing a dimension display between two points.

FIG. 3 is an explanatory view showing an angular dimension display.

FIG. 4 is an explanatory view showing a diameter dimension display of a circle.

FIG. 5 is an explanatory view showing a diameter dimension display of a circle.

FIG. 6 is a flow chart of processing of dimension display.

FIG. 7 is a flow chart of dimension display between two points.

FIG. 8 is a flow chart of angle dimension display.

FIG. 9 is a flow chart for displaying the diameter of a circle.

FIG. 10 is a block diagram of the system.

FIG. 11 is an explanatory diagram showing a procedure for displaying a part number on a three-dimensional image.

FIG. 12 is an explanatory diagram showing a procedure for displaying a part number on a three-dimensional image.

FIG. 13 is an explanatory diagram showing a part number display.

FIG. 14 is an explanatory view showing a part number display.

FIG. 15 is a flowchart of a process of displaying a part number.

FIG. 16 is a flowchart of a process of displaying a part number.

FIG. 17 is a flowchart of a process of displaying a part number.

FIG. 18 is a block diagram of the system.

[Explanation of reference signs] 10 Central processing unit of engineering workstation 14 Main calculation unit 18 Dimension line generation calculation unit 20 Three-dimensional image file data memory 22 Keyboard 24 Dimension line database 100 CRT screen 150 Three-dimensional window 200 Three-dimensional image

Claims (8)

[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
A control unit having an RT screen, a data memory for storing a file of a three-dimensional image, a database for storing data necessary for generating a dimension line, a calculation unit for calculating a dimension line generation pattern, and two-dimensional drawing data. A dimension display system for a three-dimensional image in CAD / CAM, comprising a memory and a control unit having a plotter. 2. A step of displaying a two-dimensional drawing 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. Execute the steps of designating the surface of the original image, designating two points on the designated surface, and displaying the dimension between the two points of the designated surface on the designated display point in parallel to the designated surface. The dimension display system according to claim 1. 3. A step of displaying a two-dimensional drawing 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 step of designating two lines that intersect the original image, the step of designating a point for displaying the dimension, and the step of displaying the intersecting angle dimension of the two lines at the designated display point. The described dimension display system. 4. A step of displaying a two-dimensional drawing 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 method according to claim 1, further comprising the steps of designating two intersecting planes of the original image, designating a point for displaying a dimension, and displaying a crossing angle dimension of the two planes at a designated display point. Dimension display system. 5. A step of displaying a two-dimensional drawing 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. 2. The dimension display system according to claim 1, wherein the step of designating a circle of the original image, the step of designating a point for displaying the dimension, and the step of displaying the diameter dimension of the circle at the designated display point. 6. 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.
A control unit having an RT screen, a control unit having a plotter, a data memory for storing a three-dimensional image file, a data memory for storing a two-dimensional drawing file, and a database for storing data necessary for displaying a part number. And a part for displaying a part number display, a database for storing data necessary for displaying a parts table, and a part for displaying a parts table display, the part number display on a three-dimensional image in CAD / CAM system. 7. A step of displaying a two-dimensional drawing 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 the product. To specify the parts that make up the part, to specify the surface of the specified part, to specify the point in the specified surface, to specify the point to display the part number, in the surface 7. The part number display system according to claim 6, which executes a step of displaying a part number surrounded by a circle at a rear end portion of a line indicating an indicated point by an arrow. 8. The part number display system according to claim 7, wherein the step of displaying a point of displaying a parts table on a two-dimensional drawing and the step of displaying a parts table of a product are executed.