JPS5947029A - Development display device used for bending work - Google Patents

Abstract

PURPOSE:To display easily and in a short time a development and development dimensions on a picture of a graphic display, by calculating a developed shape of an article and necessary dimensions of a material containing dimensions for bending allowance in accordance with each information, and displaying the development. CONSTITUTION:When a classification of a quality of material, plate thickness and a bending method is designated as a material data by an input from a keyboard 3, a CPU part 1 selects and reads out mean plate thickness of the corresponding bending part from a material characteristic data group stored in a storage device 2. Also, the length of a part containing no bending part of a material is derived in advance by the CPU part 1 from a dimension data being drawing information inputted from the keyboard 3. Mean plate thickness of the bending part, a bending radius, the length of the part containing no bending, and a bending angle are made parameters, and necessary dimensions of the material, containing a bending amount are derived. Subsequently, an operation processing for generating a development is executed in the CPU part 1 by synthesizing each face so that each bending part is connected in accordance with drawing information of each face generated in advance. A graphic display 4 displays development dimensions by an output of the CPU part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the creation of a development diagram as a preprocessing process for creating an NC program in sheet metal processing work using an NC Talent Punch Press (hereinafter referred to as NCTPP).

Figure 1 shows the conventional N for sheet metal processing using NCTPP.
This is a model of the work up to the creation of a C program tape. As can be seen from this figure, a bending process check is first performed, and after determining from the production drawing whether the desired bending process can be performed, a development drawing is created by performing development calculations in consideration of bending dimensions. It may not be easy to calculate the unfolded dimensions themselves depending on the shape of the part, and it is also not easy to calculate the dimensions required for the bending allowance. Since the creation of developed diagrams is the most time-consuming process up to the creation of the NC program tape, there is a need for an apparatus that can easily perform this process in a short time.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to make it easy even for unskilled people to easily and easily perform essential data and commands.

It is an object of the present invention to provide a device for easily and quickly displaying a developed view and a developed dimension table on a graphic display screen.

The present invention will be explained in detail below with reference to the drawings. FIG. 2 is a schematic diagram showing an embodiment of the present invention.

1 is an arithmetic processing unit (hereinafter referred to as a CPU section); 2 is a storage device, which is used to store a database necessary for each press; As a database, the tensile strength, yield point tensile strength, and further [44 material and plate thickness (1) and average plate thickness of 1/c bent portion by bending method (
to) and this old material property data group, bending force, pressure force for each root hair, shoulder distance of the die, horizontal projection length of the pressure-receiving part, and punch/die figure data for each name. Nc turret punch press can be processed according to the name of the Nc turret punch press and the old material method is stored.
There is a group of punch press characteristic data. These data are manually input using a human-powered device such as a keyboard or magnetic tape and stored in the storage device 2 in advance.

3 is a keyboard used to input the information necessary for processing, such as the Figure jH1 information read from the manufacturing drawing of the article that requires bending, the bending machine to be used, and the material name (material, plate thickness). It is a human powered device.

4, a graphic display for receiving the output of the CPU section 1 and displaying images;

FIG. 3 shows an example of creating a developed diagram according to the present invention. (
A) is a manufacturing drawing of the product drawn using trigonometry. After punching out a flat plate based on this production drawing, a developed drawing (c) must be created without bending to produce a product.

Before creating the development drawing, first find the location of the machine bend in the production drawing if+i and check whether the bending process can be performed. From (a), the bending parts are A, B, C
, D, so consider the order of machining and select machining check 7 on Graph Ink Display 4.
Perform Yumi 1/-/Yon. As a first step, input the plate thickness (1), the length of the bending line of the old material, the grain quality, the bending root hairs, the name of the punch and die, and the bending method as drawing data from the keyboard 3, and the CPU section] is stored. Necessary data is selected from the database, the necessary pressing force is calculated, and compared with the force applied by the bending machine to display whether the bending process is possible or not on the screen of the graphic display 4.

Next, in the second step, considering the bending order from the manufacturing drawing in Figure 3(a), we manually input the cross-sectional shape data of the finished product and the cross-sectional shape data of the punch and die to be used. 1 performs graphical calculations, and on the screen of the graphic display 4, a cross-sectional view of the punch and die and a cross-sectional view of the material are combined and displayed in accordance with the bending order. If these shapes do not overlap, it is determined that the shape is bendable.

If it is determined that bending cannot be performed due to overlap during the process, consider the processing order, punch/die dimensions, etc., and repeat the process again. All of the above can be simulated on the screen of the graphic display 4.

To create a developed view after bending, first cut out the bent parts A, 13, C', and D as shown in Figure 3 (b). The hatched part corresponds to the bent part. In this way, the three-dimensional structure is made into a group of planes, and information for each plane is entered manually from the keyboard 3. This input work may be performed at the same time as the bending/yumirenoyon input work. In other words, in order to create a development drawing, the human information required is the sheet thickness (1), material, and bending method used during bending and ezo-imulation, as well as the bending radius (8), bending angle (θ), and drawing information. Data such as the shape and dimensions of each surface are required, and each data is input from the keyboard 3. Next, a method of inputting shape/dimensional data for each surface among these input information will be explained. The drawing information for each plane to be developed can be easily displayed on the screen of the graph ink display 4 by commands issued by this device. An example of screen creation using such commands will be explained with reference to FIG. Figure 4(a)
is a plane part obtained from the manufacturing drawing. Figure 4 (b
) is a symbol to distinguish between cases where a dimension gap is included or not (A: dimension without bending, B: dimension with bend on one side, C: dimension with bend on both sides). show. When the following command commands are entered from the keyboard 3 in the order shown in Figures 4(C) to (e), the figure on the right is displayed on the screen (/). Horizontal, 1 modulus, Iφ vertical \j'θ, indicating that the vertical dimension includes bending on one side.A rectangular diagram is drawn from point 1 where the cursor is placed.Next, HM4 is Command to move the cursor from 1 to 4 and display the bending allowance on surface 9 1.P is 1110
1 indicates the bending direction, and 3 indicates that the bending is performed from 4 to 3 indicated by the cursor position.

When these manual operations described above are completed, arithmetic processing is performed in the CPU unit 1, and the shapes of each surface are connected and combined at the bending points and displayed on the screen as a developed diagram. become.

Next, the arithmetic processing within this CPU I will be explained.

When the material, plate thickness (1), and bending method are specified as material data by inputting from the keyboard 3, the CPU section 1 stores them in the storage device 2 in advance. From the material property data group, the applicable material, plate thickness,
Select and read out the average plate thickness (to) of the bent portion corresponding to the bending method.

Also, from the dimension data entered from the keyboard 3 as drawing information, the length a of the part that does not include bending of the material is calculated.
b) is calculated and determined by the CPU section l.

In this way, the 0th bend is the average plate thickness of the part (to) ■ The bending radius (R) ■ The length of the part that does not include material bending a.

b) ■ Using the bending angle (θ) as a parameter, the CPU section 1
calculates the following equation to find the required size of 'A'A, including the bending allowance. (See Figure 5) After the required dimensions of the material are determined by calculation, each surface is combined and developed so that each folded part is connected, based on the graphic information for each surface created earlier. The arithmetic processing required to create the diagram is performed in Cl) U section 1-c. In response to the output from the CPU section 1, the display 4 displays the developed view and required dimensions of the material for the bending process, that is, the unfolded/J' method, as shown in FIG. 3(c). to be displayed. Nafu... If necessary, you may draw it using an XY plotter.

After creating the developed diagram, compare whether the developed dimensions are within the processing range of the NC turret haunch brace, and if it is within the processing range, OK will be displayed on the graph ink display 4, and if it is outside the processing range, NO will be displayed. Then redo the bending simulation and development view display.

As described in detail below, when connecting each plane with this device,
The position of the bent portion is located in any one of the adjacent planes 1c, and since the connection is performed by performing calculations based on this, the algorithm is extremely simple.

Moreover, since the bending allowance is included at the same time, it has the advantage that even an unskilled person can easily create a complete developed drawing. Once you become a little skilled, you can work extremely quickly.

[Brief explanation of drawings]

Fig. 2 is a flowchart of the conventional sheet metal processing work process up to the creation of an NC program tape, Fig. 2 is a schematic diagram of a device that is an embodiment of the present invention, and Fig. 3 is an example of creating a development diagram according to the present invention. , Figure 4 is an example of surface creation using command instructions,
FIG. 5 shows an example of the shape of the bent portion. 1... jli (mirror control device. 2...:12 j evil device. 3... human keyboard. 4... graphic display. 5... XY plotter. 6... ...Control station. Patent applicant Anritsu Electric Co., Ltd. Agent Patent attorney Akihiko Sato Figure 2 Figure 5 Weight 4″TgJ 5rI!J

Claims (1)

[Claims] A development view display device for displaying a development view used when bending a sheet metal to create an article of a desired shape, comprising: the name of the old material of the metal sheet used for the bending process; The bending root hair, the manufacturing drawing information for each side of the article is divided into input devices for manual input; and the material property data for each type of trade/! P. a storage device that stores machining characteristic data groups for each type of gap processing machine as a database; desired information is selected from the data group stored in the storage device based on information input from the input device; However, based on this information, calculate the bending allowance dimension by bending the surface including the bending part of the article, obtain dimensional information for each surface, and calculate the bending allowance for each surface. An arithmetic processing device performs arithmetic processing to display an image of the expanded shape of the article and the required dimensions of the material, including bending allowance dimensions, based on the information, and a developed view is displayed based on the arithmetic processing output of the arithmetic processing device. A developed view display device equipped with a device for displaying a developed view.