JPH05128215A - Cad/cam device - Google Patents

Abstract

PURPOSE:To enable the deformation of contraction coefficient including a partially enlarged drawing without adding dimension data present on the pertinent partial enlarged drawing to a positive projection drawing. CONSTITUTION:This device is equipped with an enlarged graphic defining means 2 which recognizes which part of the positive projection drawing is equivalent to the partial enlarged drawing and adds a correlation relation to the shape data of the partial enlarged drawing. Also, the device is equipped with an enlarged drawing dimension converting means 5 which compensates the dimension of the shape by operating the scale conversion and position coordinate transformation of the dimension added to the partial enlarged drawing corresponding to the positive projection drawing and enlarged drawing interlocking contraction coefficient converting means 6 which enlarges/contracts the shape dimension of the positive projection drawing and the partial enlarged drawing after the compensation according to a prescribed coefficient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD / CAM device, and more particularly to a CAD / CAM device that supports the design and processing of a molding die.

[0002]

2. Description of the Related Art In designing and processing a mold, shrinkage occurs so that a product has a specified size in consideration of shrinkage in the process of curing when a resin is cooled in the mold. It is necessary to make the mold size larger in advance in proportion. The rate of shrinkage of a product when it is cooled is called the shrinkage rate, which is determined by various conditions and materials given to the shaping difference. The design work for enlarging the mold in consideration of the shrinkage ratio is called shrinkage ratio deformation work.

FIG. 6 is a diagram showing a general structure of a CAD / CAM apparatus. Reference numeral 7 is an NC by creating shape data from various input data, analyzing a modification / processing method of defined shape data, and processing conditions. CPU for creating data, etc., 8
Is a memory that stores various input data, 9 is a printer that prints a screen, 10 is a CRT that displays defined data, processing routes, processing conditions, input request messages, etc. on the screen, 11 is shape data, processing A keyboard for inputting conditions, a mouse 12 for selecting figures and menus displayed on the CRT 10, a supplementary storage device 13 for storing defined data and the like, and a plotter 14 for outputting a created drawing on a sheet. .. The above devices 7 to 14 are all buses 15
Connected through.

Next, a construction for making an orthographic projection view and a partially enlarged view of a molding die with such a CAD / CAM apparatus will be described with reference to FIGS. 7 and 8. As shown in FIG. 7, in the shape defining means 21, when various data regarding the shape of the molding die is input from the keyboard 11 or the mouse 12, this data is sent to the CPU 7 via the bus 15.
Then, after being processed according to the operator's instruction, shape data such as points, lines, circles, arcs, and data such as dimension lines and notes are created and displayed on the CRT 10. At the same time, this data is stored in the memory 8 by the shape data storage means 22.
Stored in. While confirming the processing result based on the display contents of the CRT 10, the shape data is repeatedly input to create an orthographic projection with a dimension line and a partially enlarged view. For example, FIG. 9 shows an orthographic projection view (front view, top view, right side view) created in this way and a partially enlarged view.

Next, the created orthographic projection and partially enlarged view are selected in order for each drawing by the shape selecting means 23 using the mouse 12, and then by the shrinkage rate deforming means 24 according to the shrinkage rate instructed by the operator. Convert to a drawing enlarged by the contraction rate.

The contraction rate deforming means 24 is constructed as shown in the flow chart of FIG. First, the dimension line data of each surface in the selected drawing is sequentially extracted (S1
1) If there is dimension line data, the dimension value considering the shrinkage rate is obtained (S13). At this time, the dimension value D to be obtained is obtained from the original dimension value d by the following equation. D = d / (1-shrinkage) When the above processing is performed on all the dimension data on the selected surface and it is determined that there is no unprocessed dimension data (S12), shrinkage deformation is performed (S14), The contraction rate deformed shape is displayed (S15). By performing such processing on all orthographic projections and partially enlarged views, the orthographic projections and partially enlarged views of the mold having the shrinkage deformation as shown in FIG. 10 can be obtained.

[0007]

Conventional CAD / CAM
According to the apparatus, the shrinkage rate deformation process cannot be performed unless dimension data is added to all drawings including a partially enlarged view of a drawing including an orthographic view and a partially enlarged view as shown in FIG. 9.
There is a problem in that it takes time and labor to input the dimensional data, and eventually it takes much time and labor to prepare the drawing of the molding die. Further, since it is necessary to add data to the orthographic projection with dimensions that cannot be easily determined from this drawing, there is a problem that the drawing becomes difficult to see.

The present invention has been made in order to solve the above problems, and in particular, it is possible to perform the shrinkage rate deformation processing without adding the dimension data existing in the partially enlarged view to the orthographic projection view. Therefore, it is an object of the present invention to provide a CAD / CAM device capable of forming a drawing of a molding die in a short time.

[0009]

SUMMARY OF THE INVENTION According to the present invention, shape defining means for defining a shape by a plurality of orthographic views, and recognition and correlation of which part of a partially enlarged view of the shape corresponds to the orthographic view. Enlarged view shape definition means added to the shape, shape storage means for storing these defined shapes, dimension expansion means for mutually complementing the dimensions of the shape in the orthographic view, and dimensions added to the partially enlarged view Enlarged view size conversion means for taking out missing dimensions by performing scale conversion and position coordinate conversion of data in accordance with an orthographic view, and enlarging the shape size of the orthographic view and partial enlarged view after complementation according to a predetermined coefficient,
And a deformation means for reducing the size.

[0010]

In the CAD / CAM apparatus of the present invention, the shape data storage means stores the shapes of the orthographic projection and the partially enlarged view defined by the shape defining means and the enlarged view shape defining means. The inter-drawing dimension line expansion means generates the dimensions defined in the orthographic view and the partially enlarged view. Enlarged view interlocking contraction rate deformation means,
The dimensions in the orthographic view and the partially enlarged view are enlarged or reduced by a predetermined coefficient. As a result, it is possible to perform deformation without adding all the dimension data in the orthographic view in which a partially enlarged view exists, so that it is possible to save time for inputting dimensions and reduce the chance of input errors. In addition, since dimension data having a size that is difficult to discriminate in the orthographic projection is not added, the screen can be easily viewed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Both CAD / CAM devices have the entire configuration shown in FIG.

In FIG. 1, reference numeral 1 designates an orthographic projection view of a molding die as shown in FIG. 4, that is, a front view, a top view, a right side view and the like by using a keyboard 11, a mouse 12 and the like. A means 2 is an enlarged view shape defining means for creating an enlarged view of a molding die as shown in FIG. 4 using a keyboard 10 or a mouse 12 for a specific portion of an orthographic view.
Is a shape data storage means for storing drawing data created by the shape definition means 1 and the enlarged view definition means 2, and 4 is omitted based on the drawing data stored in the memory 8 by the shape data storage means 3. An inter-drawing dimension line converting means for creating and supplementing dimension data from another drawing, and 6 is an enlarged view interlocking shrinkage ratio transforming means for sequentially converting the enlarged original drawing and the enlarged view after supplementing the dimension line into drawings in which the shrinkage ratio is considered. Is.

Next, the operation will be described. In the shape defining means 1, when various data regarding the shape of the molding die is input from the keyboard 10 and the mouse 12, the bus 1
The data is transferred to the CPU 7 via 5 and processed according to the operator's instruction, then shape data such as points, lines, circles, arcs, dimension lines, data such as notes are created and displayed on the CRT. And the shape data storage means 3
Is stored in the memory 8. While confirming the processing result from the displayed contents, the shape data is repeatedly input to create an orthographic projection.

Further, the enlarged view shape defining means 2 creates an enlarged view by the same operation as the shape defining means 1. At this time, surface information, corresponding reference points, and magnifications are used as information for recognizing which part of which drawing of the orthographic projection the partial enlarged view is in the shape defining means 1 for each shape data of the enlarged view. Add. As a result, for the molding die shown in FIG. 9, for example, the orthographic projection view and the partially enlarged view shown in FIG. 4 are created. Then, as can be understood from FIG. 4, it is not necessary to input the dimensions existing in the partially enlarged view in each drawing of the orthographic projection.

Here, the enlarged view dimension line conversion means 5 will be described with reference to the flowchart of FIG. In step (S21), the dimension line data added to the enlarged view is taken out. Next, in step (S22), scale information is obtained from the dimension line data, and the size of the dimension line configuration information (dimension auxiliary line, dimension arrow line, etc.) is reduced. In step (S24), the reduced dimension line is moved to the corresponding reference point of the orthographic view of the enlargement source (for example, point P1 in FIG. 4 is moved to point P2). In step (S25), the created dimension line is added to the orthographic view. From this step (S23) to step (S2)
Repeat 5) until there is no dimension line data.

The enlarged view interlocking contraction rate deforming means 6 is constructed as shown in the flow chart of FIG. That is, in step (S1), one of the partially enlarged view and the orthographic view is taken out by inputting the data of the partially enlarged view and the orthographic view shown in FIG. Step (S2) is a process in which steps (S3) to (S7) are repeated for all the surfaces of the orthographic view and the partially enlarged view.

In step (S3), the dimension line data are sequentially fetched from the shape data storage means 3. Next, the dimension value considering the shrinkage ratio is obtained (S5). At this time, the dimension value D to be obtained is obtained from the original dimension value d by D = d / (1-shrinkage rate). The above processing is performed on all the dimension data on the surface taken out in step (S1), and as a result, it is determined that there is no unprocessed dimension data (S).
4) The process of shrinkage deformation is performed (S6), and the shape after shrinkage deformation is displayed on the CRT 10 (S7). In this display,
Display the dimensions that correspond to the originally entered dimensions. Then, the process returns to step (S1).

When the processing shown in the flow chart of FIG. 3 is completed, an orthographic projection view and a partially enlarged view of the mold with shrinkage deformation as shown in FIG. 5 are obtained. Therefore, according to the CAD / CAM apparatus of this embodiment, it is possible to remarkably reduce the number of steps required to obtain the orthographic projection view and the partially enlarged view in which the contraction rate is changed.

[0019]

As described above, according to the present invention, when the drawing of the molding die is made from the orthographic projection view and the partially enlarged view thereof, the dimension data attached to the partially enlarged view is Since reduction deformation can be performed without adding dimension data to the figure, it is possible to save time for the operator to input the dimension and reduce the chance of input error.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts of a CAD / CAM device of the present invention.

FIG. 2 is a flowchart showing an operation of adding dimension line data of a partially enlarged view of the present invention to an orthographic view.

FIG. 3 is a flowchart showing an operation of the CAD / CAM device shown in FIG.

4A and 4B are an orthographic projection view and a partially enlarged view created by the CAD / CAM device in FIG.

5A and 5B are an orthographic projection view and a partially enlarged view of the orthographic projection view and the partially enlarged view of FIG.

FIG. 6 is an overall configuration diagram of a CAD / CAM device.

FIG. 7 is a main part configuration diagram of a conventional CAD / CAM device.

FIG. 8 is a flowchart showing the operation of a conventional CAD / CAM device.

9A and 9B are an orthographic projection view and a partially enlarged view created by a conventional CAD / CAM device.

FIG. 10 is an orthographic projection view and a partially enlarged view of the orthographic projection view and the partially enlarged view of FIG. 9 after shrinkage deformation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shape definition means 2 enlarged view shape definition means 3 shape data storage means 4 inter-drawing dimension line expansion means 5 enlarged view dimension line conversion means 6 enlarged view interlocking contraction rate deformation means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Tanaka, 5-14 Yanda Minami 5-chome, Higashi-ku, Nagoya City Mitsubishi Electric Corporation Nagoya Works

Claims (1)

[Claims] 1. A shape defining means for defining a shape by a plurality of orthographic views, and an enlarged view shape definition for recognizing to which part of the orthographic projection a partial enlarged view corresponds and adding a correlation to the shape. Means, shape storage means for storing these defined shapes, dimension expansion means for mutually complementing the dimensions of the shapes in the orthographic projection, and dimension data added to the partial enlarged view to the orthographic projection. Equipped with an enlarged view dimension conversion means for performing scale conversion and position coordinate conversion to take out insufficient dimensions, and a deforming means for enlarging and reducing the shape dimensions of the orthographic view and the partially enlarged view after complementation according to a predetermined coefficient. CAD / CAM device characterized in that