JPH06231215A - Sheet metal cad/cam system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sheet metal CAD / CAM system that eliminates duplication of work by the designer and greatly saves processing time. [Structure] Means 10 for defining a basic shape from an outline drawing master in which shape information such as basic outline drawing and bending position of a sheet metal is registered, and means 20 for inputting actual dimensions to parameters added to the basic shape. , A means 30 for automatically creating a product three-view drawing, a means 40 for adding a shape such as a processing hole and processing information to the product three-view drawing, a means 50 for automatically creating a development view, and data for a processing device 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 sheet metal CAD / CAM system which continuously processes production drawings and processing data of sheet metal products.

[0002]

2. Description of the Related Art FIG. 6 shows a sheet metal C which is generally used in the past.
6A and 6B show a processing flow by the AD / CAM system. FIG. 6A shows a flowchart and FIG. 6B shows a drawing corresponding to the flowchart. In FIG. 6, step 1
Indicates a process for creating a three-sided drawing of a sheet-metal product performed by the designer through the dialog input 1a using the conventional sheet-metal CAD / CAM. Step 2 is based on the sheet-metal three-sided drawing created in step 1 and the designer uses an interactive form 2a Sheet metal shape definition processing to be performed, Step 3 is plane development drawing creation processing automatically performed in the system based on the information input up to Step 2, and Step 4 is processing holes, notches, etc. in the plane development view created in Step 3. Is a machining hole definition process that is performed in an interactive format 4a, and step 5 is an NC machining device data generation process that automatically generates data for the NC machining device based on the information up to step 4.

Next, the operation of the above-mentioned conventional sheet metal CAD / CAM system will be described. First, in the three-view drawing process of step 1, a three-view drawing of a sheet metal, which is a workpiece, is created in an interactive format 1a using a sheet metal CAD / CAM system. In this case, not only the outer shape of the sheet metal but also the holes (U, V),
Make a drawing including the outline of the notch. Next, in the sheet metal shape definition processing of step 2, the shape definition of the sheet metal product is executed in an interactive form 2a based on the three-view drawing created in step 1. The definition of the sheet metal shape in this case means defining the bending position, the bending angle, the sheet thickness, the material of the material, and the like of the sheet metal. For example, in the portion P of FIG.
(Bending), “Bend at 90 degrees”, or “P part is R3”. Next, in the plane development drawing creation processing of step 3, a plane development view of the sheet metal is automatically created based on the three-view drawing created in step 1 and the shape definition of the sheet metal product of step 2. And
In the machining hole definition processing of step 4, which hole is used for the plane development view created in step 3 by the interactive format 4a,
Define which notch to machine. For example, in FIG. 6b, it is defined as "U and V are machined holes". It should be noted that at the stage of step 1, information as to whether or not the holes U and V are processed holes is not input. Finally, in the NC processing device data generation process of step 5, N is calculated based on the information up to step 4.
C The data for the processing device is automatically generated.

[0004]

[Problems to be Solved by the Invention] Conventional sheet metal CAD / C
Since the AM system goes through the processing flow as described above, it is necessary to create three sheet views of each sheet metal product (step 1) and define the shape of the sheet metal (step 2). In addition, at the step of creating a plane development view (step 3), since it is not possible to identify whether the hole or notch shown in the drawing is a machined hole or a machined notch, it is further recognized in step 4 whether it is a machined hole or not. It was necessary to make an additional definition to do. Furthermore, in the conventional system, the designer has to handle the three-sided drawing work in step 1 and the sheet metalworker to perform the work after step 2, so that a series of CAD / CAM work can be performed efficiently. There was a problem that I could not do.

The present invention has been made in order to solve the above-mentioned problems, and saves time and effort for creating a three-sided drawing of a sheet metal product and defining the shape of each product, and further re-machining a plane development view. An object of the present invention is to provide a sheet metal CAD / CAM system that can generate data for an NC processing device without definition.

[0006]

MEANS FOR SOLVING THE PROBLEMS Sheet metal CA according to the present invention
The D / CAM system is a means for the designer to select and define the basic shape from the outline drawing master that stores the basic outline drawing of the sheet metal and the shape information such as the bending position of the sheet metal and the plate thickness, and the defined sheet metal basic shape. Added parameters (H, W,
(3D view, etc.) based on the basic shape definition and parameter value input.
To automatically create a product, a means to add shape and processing information such as machining holes and notches from the symbol registration function to the three-dimensional drawing of the product, a means to automatically create a development drawing, and the above information. Originally, it is provided with a means for automatically generating data for the processing device.

[0007]

According to the sheet metal CAD / CAM system of the present invention, the basic shape of the sheet metal is defined from the previously registered outline drawing master, and the product dimensions are input to the basic shape to design the product. It saves time and effort to create sheet metal fabrication drawings with different dimensions one after another, and the design becomes much simpler than before. Further, by performing the machining hole shape and machining recognition information at once by the machining hole definition processing and after creating the three-sided drawing, it is not necessary to define the machining hole separately from the hole shape drawing as in the conventional case, and the sheet metal CAD / The processing time of the CAM system is greatly saved. Further, since the CAM work which generally depends on the sheet metal processing factory side can be processed on the design side, the work efficiency can be improved and the production delivery time can be shortened.

[0008]

【Example】

Example 1. FIG. 1 is a sheet metal CAD according to a first embodiment of the present invention.
It is a processing flow figure which shows a / CAM system. In the figure, step 10 shows the basic shape definition process of the sheet metal that is performed in advance of product design. The basic outline drawing of several types of sheet metal and the outline drawing master in which the shape information such as the bending position of the sheet metal is registered in advance. From the designer's interactive form 1
The basic shape of the sheet metal is selectively defined by 0a. Step 20
Indicates a parameter value input (actual dimension input) process for inputting actual dimensions to the parameters added to the basic shape of the sheet metal defined in step 10.
Shows a three-view drawing creation process for automatically creating a manufacturing drawing by the trigonometric drawing method based on the basic shape definition in step 20 and the parameter value input in step 20, and step 40 shows a machining hole for the sheet metal three-view drawing created in step 30, A processing hole addition process for additionally defining information such as a notch is shown. Step 50 shows a process for automatically creating a plane development view of a sheet metal based on the information up to step 40, and step 60 is created by step 50. The processing for automatically generating the data for the NC processing device based on the plane development view is shown. The sheet metal shape definition of the present embodiment shows an example in which three-dimensional CAD is used. Further, the three-sided view creation process in step 30 may be an N-side view (N is an integer) creation process of the sheet metal product.

Next, the processing flow of the first embodiment will be described. First, in the basic shape definition process of step 10, in view of the fact that the basic shape does not cover many types due to the nature of sheet metal products, several types of basic outline drawings and shape information such as sheet metal plate thickness and bending position are stored in advance. Register in the basic outline drawing master, from which the designer can interact 1
0a is appropriately selected and defined. Here, the basic outline drawing master, for example, as shown in FIG. 2, creates a basic sheet metal outline drawing in an interactive form by a triangle drawing method, and then the parameters H (height) and W (depth) are added to the outline drawing. , D (width), etc. are additionally defined, and the bending position (point P) of the sheet metal, bending angle (θ), sheet thickness
(t), shape information such as material quality (three-dimensional shape definition) is input and created. The basic outline drawing master is basically incorporated in the system construction stage in advance, but the product designer can create it on the spot and newly define it.
Next, in the parameter value input processing of step 20, the actual dimensions and the like are interactively added to the parameters (W, H, D, etc. of FIG. 1) of each part added to the sheet metal basic shape selected and defined in step 10 in an interactive form 20a. input. In the three-view drawing process of step 30, a sheet metal fabrication drawing (three-view) by the trigonometry is automatically created based on the basic shape defined in step 10 and the data obtained by the parameter value input of step 20. . At this point, the outer shape of the machined hole and the like and the machining information are not added. Next, in the processing hole addition processing of step 40, information such as processing holes and notches is additionally corrected in an interactive format 40a with respect to the sheet metal three-view drawing automatically created in step 30. As shown in FIG. 3, the definition here is that the hole shape, the notch shape, and the attribute information such as H (height), W (length), and D (radius) are registered in advance in the hole machining symbol. Allow the designer to select and define from among them. Then, in the plane development drawing creation process of step 50, the plane development view is automatically created from the sheet metal product drawing (three views) based on the information from step 10 to step 40. Data for the NC processing device is automatically generated based on the created plane development view.

As described above, in the first embodiment, step 1 is performed.
At 0, since the basic outline drawing of the sheet metal and the shape information such as the bending position are created in advance and registered in the outline drawing master, the designer selects the basic shape of the sheet metal from the master, and further, in step 20, H ( A sheet metal trihedral view and a plan development view can be easily and accurately created by simply inputting actual dimensions in parameters such as height, W (width), and D (depth). Further, as shown in FIG. 6, conventionally, the drawing of the machining hole outline (step 1) and the recognition definition of the machining hole (step 4) were separately performed. At this time, by using a hole drilling symbol having attribute information registered in advance, it becomes possible to define the drilled hole once and easily.

Embodiment 2. In the first embodiment, step 1
Although the example of using the three-dimensional CAD for the basic shape definition of 0 is shown, the two-dimensional CAD is used as shown in FIG. 4, and the surface 1 and the surface 2 and the respective connection conditions (the surfaces 1 and 2 have an angle of 90 degrees). It is also possible to define the shape by inputting (for example, combined with). In this embodiment, since the shape is defined by two-dimensional CAD, it is possible to operate in a two-dimensional CAD environment in the three-view drawing processing step, and the system is relatively inexpensive.

Embodiment 3. Similarly, Step 1 of Example 1
In the basic shape definition of 0, it is also possible to define the shape by describing the surfaces 1 and 2 and their connecting conditions using a dedicated language for defining the sheet metal shape as shown in FIG.
In this example, since a dedicated language for shape definition is used,
The feature is that the shape can be defined without occupying a graphic terminal, and the terminal can be utilized exclusively for graphic processing such as drawing work.

[0013]

As described above, according to the present invention, since the shapes of sheet metal products are highly similar to each other, the basic shape is defined from the registered outline drawing master and the actual dimensions are substituted to perform the sheet metal CAD design. Since this is performed, drawing or shape definition for each product is unnecessary or greatly labor-saving. Also, by adding the machining hole shape and machining recognition information at once and after creating the three-sided drawing, it is not necessary to define the machining hole after creating the drawing as in the conventional method, so the processing time of the sheet metal CAD / CAM system is increased. Is greatly reduced. Further, since the CAM work, which generally depends on the sheet metal factory, is processed by the designer, the work efficiency can be improved and the delivery time can be shortened.

[Brief description of drawings]

FIG. 1 is a process flow diagram of a sheet metal CAD / CAM system according to a first embodiment.

FIG. 2 is a processing flowchart showing details of basic shape definition processing according to the first embodiment.

FIG. 3 is a diagram showing a hole drilling symbol in a drilled hole definition process of the first embodiment.

FIG. 4 is a diagram showing basic shape definition processing by two-dimensional CAD according to the second embodiment.

FIG. 5 is a diagram showing basic shape definition processing using a dedicated language according to the third embodiment.

FIG. 6 is a processing flow chart of a conventional sheet metal CAD / CAM system.

[Explanation of symbols]

 Step 10 Basic shape definition processing Step 20 Parameter value input processing Step 30 Three-dimensional drawing creation processing Step 40 Machining hole addition processing Step 50 Development drawing creation processing Step 60 Machining device data creation processing Step 100 Basic shape definition processing (two-dimensional CAD) step 101 Basic shape definition processing (dedicated language) 10, 20, 40a Interactive format 100a Interactive format

Claims (1)

[Claims] 1. A basic shape defining means for selecting and defining a basic shape of a sheet metal from an outline drawing master registering shape information such as a basic outline drawing of a sheet metal and a bending position, and a basic shape defining means added to the defined sheet metal basic shape. Parameter value inputting means for inputting actual dimensions to existing parameters, N-side view creating means for automatically creating an N-side view (N is an integer) of the sheet metal based on the basic shape definition and the parameter value input, and the sheet metal Machining hole adding means for adding shapes and machining information such as machining holes and cutouts to the N-side view, development drawing creating means for automatically creating a development view from the sheet metal N-side view, and a processing device based on the information. Sheet metal CAD / CAM system including a data generating unit for a processing device that automatically generates data for the processing.