JPH07152793A - Solid model plotting device - Google Patents

Abstract

PURPOSE:To provide a solid model plotting device which can easily construct a solid model consisting of plural constitution parts. CONSTITUTION:When a contact detection means 42 detects that one of the plural kinds of constitution parts moved by a moving means 40 is brought into contact with the other constitution parts, a movement inhibition means 44 inhibits movement by the movement means 40. Thus, a state where one constitution part is brought into contact with the other constitution parts can be generated with a simple operation, and the solid model consisting of the plural constitution parts can easily be constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing apparatus for drawing a solid model composed of a plurality of types of components.

[0002]

2. Description of the Related Art A drawing device for drawing a solid model composed of a plurality of types of components is known. For example, a device called a solid CAD system as described in JP-A-2-41573 is such a device. In such an apparatus, for example, in order to design or modify a die or an apparatus composed of a plurality of constituent parts, a plurality of solid models for each constituent part which are built in advance are combined to obtain a predetermined solid model. Is configured.

[0003]

By the way, in the conventional solid model drawing apparatus as described above, the operator edits the solid data for designing and modifying the apparatus represented by the solid model by the operator. It is done by specifying. That is, it is necessary for the worker to instruct which figure element is to be moved and in which posture. Therefore, when a plurality of components are assembled to form one component, when the components are brought into contact with each other, the input work is troublesome and the operator's burden is heavy. It was

The present invention has been made in view of the above circumstances, and an object thereof is to provide a solid model drawing apparatus capable of easily constructing a solid model composed of a plurality of constituent parts. It is in.

[0005]

In order to achieve the above object, the gist of the present invention is a solid model drawing apparatus for drawing a solid model composed of a plurality of types of component parts. Moving means for independently moving the plurality of different types of component parts, and (b) detecting that one of the plurality of types of component parts moved by the moving means has contacted another component part. And (c) movement prohibiting means for prohibiting movement by the moving means when a contact is detected by the contact detecting means.

[0006]

With this configuration, when the contact detecting means detects that one of the plurality of types of constituent parts moved by the moving means has come into contact with another constituent, the movement prohibiting means causes Movement by the moving means is prohibited.

[0007]

Therefore, the contact state of a plurality of types of components can be created by a simple operation, and a solid model composed of a plurality of components can be efficiently and easily constructed.

Here, the solid model drawing device is
Preferably, a dimensional tolerance setting unit that sets a dimensional tolerance on at least one of the plurality of types of solid modeled components, and a component whose dimensional tolerance is set by the dimensional tolerance setting unit Solid-model conversion means for converting into a solid model having a shape including, and the contact detection means detects contact based on the solid model having a shape including the dimensional tolerance converted by the solid-model conversion means.

Further, preferably, the solid model drawing apparatus has a machining condition setting means for setting a machining condition applied to the component, and a component after being machined according to the set machining condition. And a display means for displaying the solid model of the machined part. In this way, the dimensional tolerance can be easily evaluated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a solid model drawing apparatus used for designing a forging die. This solid model drawing device includes a drawing calculation control device 10. The drawing calculation control device 10 is connected to another computer or a solid model drawing system (not shown) through a high-speed communication line 12. The drawing calculation control device 10 is provided with a ROM and a RAM (not shown), and these constitute a data storage device and a program storage device. In the program storage device, an OS for executing the program, a wireframe model is created with the lines in the space representing the features of the three-dimensional shape such as ridges, contours, and intersections as shape data. A shape modeler to generate, a shape modeler for generating a surface model that adds surface information to the wire frame model, a solid modeler for generating a solid model by combining basic solids, etc. are stored in advance or necessary. Accordingly, the data is stored by being loaded from the CD-ROM 14.
In addition, the shape data stored in the shape data file of the magnetic disk storage device 18 or the magnetic tape storage device 20 is stored in advance in the data storage device as needed.

The drawing arithmetic and control unit 10 executes a prestored program in accordance with an input signal from the graphic controller 16 or the like to extract a wire frame model, a surface model, from a predetermined shape data.
Alternatively, solid models are generated, and shape data representing the models are stored in a predetermined file of the magnetic disk storage device 18 or the magnetic tape storage device 20, and
In response to a command from the graphic controller 16, the plotter device 21 is caused to draw the model or a design drawing representing the model as necessary.

The graphic controller 16 temporarily stores the shape data representing a predetermined graphic from the drawing calculation control device 10, and at the same time stores the graphic in the CRT device 32.
And a keyboard device 22, a mouse device 24, and a light pen device 2 based on a program stored in advance.
6, the above graphic is processed according to the input signals from the joystick device 28, the dial device 30, etc. to newly create shape data and to display it on the CRT device 32. In addition, the graphic controller 16 makes a hard copy 3 of the graphic displayed on the CRT device 32 as needed.
4 to output.

The drawing arithmetic and control unit 10 also has a function of, when forming a solid model in which a plurality of parts are combined, preventing the parts from coming further after they come into contact with each other. FIG. 2 is a functional block diagram illustrating the control function of the drawing calculation control device 10. In the figure, when the contact detection means 42 detects that one of the plurality of types of component parts moved by the moving means 40 has come into contact with another component, the movement prohibiting means 44 causes the moving means to move. Movement by 42 is prohibited.

The control operation of the drawing calculation control device 10 will be described below with reference to the flowchart of FIG. First, in step SS1, solid data representing solid models of a plurality of types of parts, that is, the first reference part 50, the second reference part 52, and the assembly part 54, is operated by an input device such as the keyboard device 22 and the mouse device 24. Is read from the magnetic disk storage device 18, the magnetic tape storage device 20, or another solid model drawing system and displayed on the screen of the CRT device 32. FIG. 4 is an example of the display.

In the subsequent step SS2, the first reference component 50, the second reference component 52, and the assembly component 54 are placed at predetermined positions on the screen of the CRT device 32 in accordance with a command issued by operating the keyboard device 22, the mouse device 24 or the like. Is located in. FIG. 5 is an example of the display. Next, in step SS3, the constraint condition is input by operating the keyboard device 22, the mouse device 24 and the like. As the constraint condition, a constraint part of the part, a constraint form, a movement form, etc. are set. In this embodiment, the first V-groove surface 56 of the first reference component 50 and the first end of the shaft end of the assembly component 54 are used as the restraint portion of the component.
The spherical surface 58 is set, the point contact is set as the restraint mode, and the parallel movement of the assembly part 54 is set as the movement mode.

When the constraint condition is set as described above, in the subsequent step SS4, the assembly part 54 is translated. That is, a straight line connecting the closest points between the first V groove surface 56 of the first reference component 50, which is the restraint portion, and the first spherical surface 58 of the shaft end of the assembly component 54, is calculated based on the solid data. The parallel movement of the assembly part 54 is started in the direction parallel to the straight line. Then, in step SS5,
The distance L between the first V groove surface 56 of the first reference component 50 and the first spherical surface 58 of the shaft end of the assembly component 54 is calculated and it is determined whether or not the distance L becomes zero.

Initially, the determination at step SS5 is denied, and therefore, the movement of the assembly part 54 is continued by executing the steps after step SS4 again. And
If the first V groove surface 56 of the first reference component 50 and the first spherical surface 58 of the shaft end of the assembly component 54 come into contact with each other while the movement of the assembly component 54 continues, the determination in step SS5 is positive. Therefore, in step SS6, the first reference component 5
The movement of 0 is prohibited and the restraint is completed.

Next, at step SS7, it is judged whether or not there is another constraint condition. When an input operation that there is another constraint condition is performed, the determination in step SS7 is affirmative, and thus step SS3 and subsequent steps are executed again. In the case of the present embodiment, in the subsequent step SS3, the second V groove surface 60 of the first reference component 50 and the first spherical surface 58 of the shaft end of the assembly component 54 are set as the constraint portion of the component, and the constraint form is set. The point contact is set, and the parallel movement of the assembly component 54 is set as the movement mode. Therefore, by executing the following steps SS4 to SS6, the assembly component 54 is translated in the state where the contact between the first V groove surface 56 and the first spherical surface 58 is held, and the first reference component is moved. The second V groove surface 60 of 50 and the first spherical surface 58 of the shaft end of the assembly part 54 are brought into contact with each other. FIG. 6 shows this state.

Then, in response to the operator's input operation selecting that there is another constraint condition, the determination at step SS7 is affirmed again, so at step SS3 that follows,
The first reference surface 6 of the second reference component 52 as a restraint portion of the component
2 and the outer peripheral surface 64 of the assembly part 54 are set, point contact is set as the restraint mode, and the assembly part 54 is set as the movement mode.
Rotation is set. Therefore, by executing the following steps SS4 to SS6, the second spherical surface 66 of the assembly part 54 is kept in a state where the contact between the first V groove surface 56 and the second V groove surface 60 and the first spherical surface 58 is maintained. Side is rotated in a direction approaching the second reference component 52 side, and the first reference surface 62 is rotated.
The outer peripheral surface 64 of the assembling component 54 is brought into contact with. FIG. 7 shows this state.

As a result, other restraint conditions intended by the operator are eliminated, so that the determination in the following step SS7 is denied, the component placement is completed in step SS8, and the solid data representing the component placement in this state is predetermined. It is stored and saved in the storage area.

As described above, according to this embodiment, the first spherical surface 58 or the outer peripheral surface 64 of the assembling component 54 moved by the step SS4 corresponding to the moving means 40 is the first
When the contact with the first V groove surface 56, the second V groove surface 60 of the reference component 50, or the first reference surface 62 of the second reference component 52 is detected by step SS5 corresponding to the contact detection means 42, the movement is prohibited. Step SS corresponding to means 44
6, the parallel movement or rotation of the assembly part 54 is prohibited. Therefore, the assembled component 54 is replaced with the first reference component 50.
Also, the state of being in contact with the second reference component 52 can be created by a simple operation, and a solid model composed of a plurality of components can be efficiently and easily constructed.

FIG. 8 shows the control operation of the drawing calculation control device 10 in another embodiment of the present invention. In the figure, in step ST1, similar to step SS1, the first reference component 50, the second reference component 52, the assembly component 5
The solid data of No. 4 is read, and in step ST2, those parts are arranged as shown in FIG. 5 as in step SS2.

In the subsequent step ST3, the dimensional tolerances of the respective parts such as the length of the assembly part 54, the diameters of the first spherical surface 58 and the second spherical surface 66, the taper angle and the diameter of the outer peripheral surface 64 among the above-mentioned parts are determined by the keyboard. Settings are input from an input device such as the device 22. Then, in step ST4, the calculation of the tolerance for obtaining the maximum tolerance and the minimum tolerance is performed,
In step ST5, a solid model of the maximum shape and the minimum shape of the assembly part 54 is created.

In the part restraint routine of the subsequent step ST6, the same control operation as that of steps SS3 to SS8 in FIG. 3 is executed, so that the maximum shape solid model 70 and the minimum shape solid model 72 of the assembly part 54 are executed. A solid model in a state of being constrained by the first reference component 50 and the second reference component 52 is created and displayed.
FIG. 9 shows this state.

Next, in step ST7, the processing conditions are set and input by operating the input device such as the keyboard device 22. As the processing conditions, cutting, cutting, drilling, etc. are set as the type of machining, and the dimension from the reference position is set as the processing location.

In step ST8, the above-mentioned step ST
Solid data representing the three-dimensional shape of the part obtained according to the machining conditions set in 7 is created, and in step ST9, a solid model based on the solid data is displayed on the CRT device 32. In the present embodiment, for example, the cutting surface 76 of the assembly part 54 is set as the processing condition, and the solid model after the cutting processing shown in FIG. 10 or 11 is displayed according to the selection operation by the keyboard device 22 or the like.

Next, in step ST10, it is determined whether or not there are other processing conditions according to the input operation using the keyboard device 22 or the like. If the determination in ST10 is affirmative, steps ST7 et seq. Are executed again, other machining conditions for the predetermined part are set, and a solid model showing the shape after machining is displayed. However, if the determination in step ST10 is negative, it is determined in step ST11 whether or not there is a change in the tolerance previously set according to the input operation by the keyboard device 22 or the like. If there is a change in the tolerance due to the evaluation of the solid model after machining, the determination in step ST11 is affirmative, and therefore step ST3 and the following steps are executed again.
If the determination at T11 is negative, this routine is ended.

As described above, according to this embodiment, the assembled component 5 is processed in step ST3 corresponding to the dimension tolerance setting means.
4, the dimensional tolerance of 4 is set, and the solid model of the maximum shape and the solid model of the minimum shape of the assembly part 54 having the tolerance set in step ST5 corresponding to the solid model conversion means are created, and the part constraint routine of step ST6. As a result, it is possible to create a state in which the maximum-shaped solid model and the minimum-shaped solid model of the created assembly part 54 are in contact with the first reference part 50 and the second reference part 52 by a simple operation. It is possible to efficiently and easily construct a solid model consisting of the components.

Further, in the part restraint routine of step ST6, the maximum shape solid model and the minimum shape solid model of the assembly part 54 for which the tolerances are set are created, and the solid model meets the preset constraint conditions. Since it is displayed while being held, it is possible to easily evaluate the component tolerance.

Further, according to the present embodiment, the assembled parts 54 are processed in step ST7 corresponding to the machining condition setting means.
In step ST8 corresponding to the post-machining solid model creating means, the solid model after the machining of the maximum shape and the minimum shape of the assembly part 54 with the set tolerance holds the constraint state. Was created while
Since it is displayed by the CRT device 32 corresponding to the display means, it is possible to easily carry out the evaluation after machining such as the required plane area and the black leather cutting residue.

The above description is merely one embodiment of the present invention, and the present invention can be variously modified without departing from the gist thereof.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a functional block diagram illustrating a control function of the embodiment of FIG.

FIG. 3 is a flowchart illustrating a control operation of the embodiment of FIG.

FIG. 4 is a diagram showing a display example of solid models of a plurality of parts selected by the control operation of FIG.

5 is a diagram showing an arrangement example of a plurality of components of FIG. 4 by the control operation of FIG.

6 is a view showing the respective parts of FIG. 5 brought into contact with each other by the control operation of FIG.

FIG. 7 is a diagram showing each component whose restraint is completed by the control operation of FIG.

FIG. 8 is a flowchart illustrating a control operation according to another embodiment of the present invention.

9 is a diagram showing a solid model of a maximum tolerance component shape and a minimum tolerance component shape displayed by the control operation of FIG.

10 is a diagram showing a solid model of a part shape after machining, which is displayed by the control operation of FIG.

11 is a diagram showing a solid model of a part shape after machining, which is displayed by the control operation of FIG.

[Explanation of symbols]

 10: Drawing calculation control device 32: CRT device (display means) 40: Moving means 42: Contact detecting means 44: Movement inhibiting means Step ST3: Dimensional tolerance setting means Step ST5: Solid model converting means Step ST7: Machining condition setting means Step ST8: Means for creating solid model after machining

Claims (3)

[Claims] 1. A solid model drawing device for drawing a solid model composed of a plurality of types of constituent parts, the moving means independently moving the plurality of types of solid modeled constituent parts, and moving by the moving means. Contact detecting means for detecting that one of the plural kinds of constituent parts made contact with another constituent part, and prohibiting movement by the moving means when contact is detected by the contact detecting means A solid model drawing device including a movement prohibiting means. 2. A dimension tolerance setting means for setting a dimension tolerance to at least one of the plurality of types of solid modeled components, and a dimension of the component having a dimension tolerance set by the dimension tolerance setting means. A solid model converting means for converting into a solid model having a shape including tolerance, wherein the contact detecting means detects contact based on the solid model having a shape including the dimensional tolerance converted by the solid model converting means. A solid model drawing apparatus according to claim 1. 3. A machining condition setting means for setting machining conditions applied to the part, and a post-machining solid model for creating a solid model of the part after being machined according to the set machining conditions. The solid model drawing apparatus according to claim 1, further comprising: a creating unit and a displaying unit for displaying the solid model created by the machined solid model creating unit.