JPH07282125A - Method for preparing ventilation duct one-part fabrication drawing - Google Patents

Abstract

PURPOSE:To prepare a ventilation duct one-part fabrication drawing in a short time without the need of experience by synthesizing elements selected from a solid shape pattern menu and preparing a birds-eye view with a computer aided design(CAD), projecting the birds-eye view and generating a projection drawing. CONSTITUTION:The CAD is used, the element 2 to be a master is selected from the solid shape pattern menu of a lot of ventilation duct basic elements prepared beforehand, a dimension is inputted, the element 3 to be a slave is successively selected from the solid shape pattern menu and the dimension is inputted. Then, on a screen 4, joined surfaces 2a and 3a are respectively given to the master element 2 and the slave element 3, the elements are synthesized and assembly is performed. Further, the process of synthesizing the different slave element 3 selected from the solid shape pattern menu whose dimension is inputted similarly with the assembled drawing is repeated and a ventilation duct birds-eye view 5 is prepared. Thereafter, a projection direction is given to the birds-eye view 5, the projection drawings such as a front view, a side view and a plan view, etc., are generated and dimension lines or the like are added to the respective projection drawings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a draft drawing of a ventilation duct used when designing a ventilation duct required for a ship or the like in detail.

[0002]

2. Description of the Related Art In designing a ship, it is an important matter to make a one-piece manufacturing drawing in order to design a ventilation duct that serves as a ventilation passage in detail.

When creating a draft of a ventilation duct,
Conventionally, for example, a work of manually constructing a bird's-eye view by assembling a three-dimensional shape by looking at a plan layout of a ship and converting the bird's-eye view into a projection such as a plan or side view is performed manually. ing.

[0004]

However, in the case of the method for creating a draft drawing of a draft duct by manual work as described above, it is a work that requires a great deal of skill, and an inexperienced worker not only takes a lot of time, If there is a defect in the projected figure, it may lead to a manufacturing error.

Therefore, the present invention is intended to make it possible to prepare a draft drawing of a ventilation duct in a short time without requiring skill.

[0006]

In order to solve the above-mentioned problems, the present invention uses a computer-aided design to select a parent element from a prepared three-dimensional shape pattern menu of ventilation duct basic elements. Select and enter the dimensions, then
Make a bird's-eye view of the ventilation duct by selecting the child element from the three-dimensional shape pattern menu, inputting the dimensions, and then designating the joining surface for each of the parent and child elements and synthesizing the elements. Alternatively, or by further repeating the step of synthesizing another child element selected from the above three-dimensional shape pattern menu and inputting the dimensions in the same manner, a ventilation duct bird's-eye view is created, and then, A draft drawing of one draft duct characterized by completing a draft drawing of one draft duct by instructing the projection direction on the bird's-eye view and raising the projection diagram and adding dimension lines, leader lines, etc. to each projection diagram And how to create.

[0007]

[Function] Since the basic elements selected from the three-dimensional shape pattern menu can be confirmed from various directions at the time of input, a bird's-eye view of the ventilation duct can be accurately created. Further, since the bird's-eye view is projected and the projected view is raised, the one-item manufacturing drawing can be easily created.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a flow of a method for producing a draft drawing of a ventilation duct according to the present invention. In the present invention, a computer aided design (CAD) is used and a large number of ventilation ducts are prepared in advance. Select the parent element from the 3D pattern menu of the element and enter the dimensions, then select the child element from the 3D pattern menu above and enter the dimensions, and then on the screen. Specify the joining surface for each of the parent element and the child element and combine the elements to assemble them, and similarly, already assemble another child element selected from the above three-dimensional shape pattern menu and inputting dimensions. A ventilation duct bird's-eye view is made by repeating the process of synthesizing to the given figure a required number of times, and thereafter, the projection direction such as a front view, a side view, and a plan view is raised by instructing the projection direction on the bird's-eye view. Throw By adding dimension lines, leader lines, etc. to the shadow drawing, the draft drawing of the ventilation duct is completed and output.

More specifically, as the three-dimensional shape pattern menu 1 of the ventilation duct basic elements, for example, the basic elements of the branch pipe as shown by the registration numbers "D1" to "D8" in FIG. In FIG. 3B, the basic elements of the bent pipe as shown by registration numbers “E1” to “E8”, and further, although not shown, a straight pipe, a triangular pipe, a rising pipe, a falling pipe, a diffuser. Prepare and register a large number of basic elements for ventilation ducts, such as a trumpet, a trumpet, and a grill.

In the above state, first, the code is input and the three-dimensional pattern menu 1 to be used is selected.
Next, the basic element to be used is selected from the three-dimensional shape pattern menu 1, this is displayed on the main screen 4a of the screen 4 as the parent element 2 as shown in FIG. 4, and the size is input. Then, similarly, from the three-dimensional shape pattern menu 1, a basic element used as the child element 3 is selected and displayed on the sub-screen 4b of the screen 4 as shown in FIG. . Incidentally, in FIG.
The parent element 2 is the side to be joined, the branch pipe as shown by the registration number “D4” in FIG. 3A is the parent element 2, and the side to be joined is the child element 3 in FIG. "E
1 "shows a bent tube. Then, the joining surface 2a of the parent element 2 and the joining surface 3a of the child element 3 are displayed on the screen 4.
Is executed, and the elements 2 and 3 are combined and assembled as shown in FIG. 5 by execution. Further, in the same manner, the process of selecting the next child element 3 and assembling it is repeated as many times as necessary to complete the ventilation duct solid view on the screen 4. That is, as shown in FIG. 6, a bird's-eye view 5 of a single ventilation duct is created.

The program for assembling the child element 3 with respect to the parent element 2 is executed based on the flow shown in FIG.
That is, as shown in FIG. 4, in a state where the parent element 2 and the child element 3 are displayed on the screen 4, first, the mouse cursor is moved to the respective joint surfaces of the parent element 2 and the child element 3 to move the mouse cursor. When the execute button is pressed, the position of the mouse cursor is converted into coordinates and the information of the surface is extracted. At this time, it is determined whether the surface is visible or invisible in the display state, and if it is visible, then it is determined whether the mouse cursor is inside the surface. If it is inside the surface, the coordinate conversion matrix of the surface is determined. Desired. Here, after confirming that the joint surfaces of both the parent element 2 and the child element 3 are designated and pressing the execution button, the child element 3 is rotated by the obtained coordinate transformation matrix, and further rotated. The child element 3 thus obtained is moved in parallel to a specified point on the joint surface of the parent element 2 and combined, and the combined state is displayed on the screen. In the above, if the joining surface is not visible in the display state, or if the joining surface is visible but the cursor is not in the surface, by pressing the execute button,
The display state of the surface is changed by rotation by the number of surfaces of the parent element 2 or the child element 3.

Next, in a state where the bird's-eye view 5 is displayed on the screen 4, the projection direction is designated on the bird's-eye view 5, and the direction shown in FIG.
6, front view 6, side view 7, bottom view (plan view) 8
A projection drawing such as is created, and a dimension line, a dimension, a leader line, a code, and the like are further added to each projection drawing, and a comment sentence is input to complete the one-item manufacturing drawing. Register the completed one-item manufacturing drawing in a data file and output it on a printer. Further, a material summary table (member list) is output.

In the above, when a plurality of drawings are created collectively, the bird's-eye view created by assembling each element is temporarily registered in the external data file,
Output the external interface data when the registration of all parts is completed. Therefore, when adjusting the drawing after registration, the drawing data may be read from the external data file, the shape may be confirmed, and then the one-piece manufacturing drawing may be created by the same procedure as described above.

As described above, in the present invention, since the three-dimensional shape can be confirmed from various directions at the time of inputting the element of the one-piece shape, there is no mistake in the shape, which makes it easy to create a bird's-eye view that is difficult to create. It is possible to create a drawing, and by designating the projection direction on this bird's-eye view, it is possible to easily create a projection, and therefore, even an unskilled operator can create a one-piece manufacturing drawing in a short time. You can Further, since it is easy to use the shape pattern and divert the existing data, standardization can be promoted, and since the area of the complicated shape can be automatically calculated, the material calculation and the self-weight calculation are unnecessary, and the accuracy can be improved. it can.

Although the present invention shows the case where a plurality of child elements are sequentially combined with the parent element in the above embodiment, only one child element is combined with the parent element depending on the shape of the ventilation duct. Of course, it may be sufficient, and it goes without saying that various changes can be made without departing from the scope of the present invention.

[0017]

As described above, according to the method for producing a draft drawing of a ventilation duct according to the present invention, by the computer aided design,
A bird's-eye view is created by synthesizing the elements selected from the three-dimensional shape pattern menu, and this bird's-eye view is projected to raise the projected view, so it is easy and accurate to produce one ventilation duct without the need for skill. It has the excellent effect of being able to create diagrams.

[Brief description of drawings]

FIG. 1 is a flowchart of a method for creating a draft drawing of a ventilation duct according to the present invention.

FIG. 2 is a flow chart showing a program for assembling elements.

FIG. 3 shows a three-dimensional shape pattern menu,
(A) is a schematic diagram showing an example of a branch pipe, and (B) is a schematic diagram showing an example of a bent pipe.

FIG. 4 is a schematic diagram showing an example of a state in which a parent element and a child element are displayed on a screen.

FIG. 5 is a schematic diagram showing an example of a state in which a child element is combined with a parent element on the screen.

FIG. 6 is a schematic view showing a state in which a bird's-eye view of a ventilation duct one-piece shape is displayed on the screen.

FIG. 7 is a schematic view showing a state in which a ventilation duct one-piece manufacturing drawing is displayed on a screen together with a bird's-eye view.

[Explanation of symbols]

 1 Three-dimensional shape pattern menu 2 Parent element 2a Joining surface 3 Child element 3a Joining surface 4 Screen 5 Bird's-eye view 6 Front view (projection view) 7 Side view (projection view) 8 Bottom view (projection view)

Claims (2)

[Claims] 1. A computer-aided design is used to select a parent element from a three-dimensional shape pattern menu of a plurality of prepared ventilation duct basic elements, input dimensions, and then,
Make a bird's-eye view of the ventilation duct by selecting the child element from the above three-dimensional shape pattern menu, inputting the dimensions, then designating the joint surface for each of the parent element and child element and synthesizing the elements. After that, the projection direction is indicated on the bird's-eye view, the projection is raised, and a dimension line, a leader line, etc. are added to each projection to complete the draft of the ventilation duct. How to make a draft of a ventilation duct. 2. The method for producing a ventilation duct one-piece manufacturing drawing according to claim 1, wherein the ventilation duct bird's-eye view is created by repeating a step of combining the parent element and the child element a required number of times.