JP2801626B2 - How to create a development view - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of creating a development view by an automatic programming device by adding an allowance for expansion or contraction of a material, that is, an allowance for expansion or contraction, in a sheet metal working operation. is there.

[Conventional technology]

FIG. 26 is a processing configuration diagram in a conventional method of creating a development view based on an object which is a two-dimensional figure. In FIG. 26, reference numeral 10 denotes a composition of a one-to-one figure drawn on a screen. Combining point indicating means for indicating which part to connect
Is a means for inputting elongation allowance conditions that specifies the conditions under which the connection is to be bent (product material, plate thickness, degree of bending, etc.), and 4 is to take into account the amount of elongation that occurs when bending as a product. The correction amount calculating means for calculating the necessary correction amount using the information designated by the elongation allowance condition input means 3, and the reference numeral 11 is obtained by the combination point designated by the combination point designating means 10 and the correction amount calculating means 4. Graphic data correction means 12 for correcting the data of the connected portion using the correction amount, and development pattern display means 12 for converting the data corrected by the graphic data correction means 11 into graphic data and displaying the graphic data on a screen.

FIG. 27 is an explanatory diagram of a development view creating method.
(A) is a perspective view of the product 13 to be developed, and (b) is a drawing showing the product 13 by a triangular projection or the like.
(Front view) and FIG. B (right side view) are drawn on the screen. (C) is a developed view 14 of the product 13 obtained by each of the above-mentioned means. In addition, in the development of the development diagram, H / W of general-purpose personal computer, workstation, etc.
This is performed by an automatic programming device using

Next, a method of creating a development view will be described. Now, when creating a development view of the product 13 shown in FIG. 27 (a), for the figure A and the figure B drawn on the screen,
Is used to indicate the shape a of the shape A and the shape b of the shape B in FIG. 28, and the range of synthesis (the range on the shape A side of the connection portion between the front view (figure A) and the right side view (figure B)) is obtained. decide.
In this case, from four points (a1, a2, b1, b2), the range of combination is determined as a1 → a2 (composition location a).

Next, the product material, plate thickness,
Specify conditions such as bending angle.

Then, a correction amount necessary for taking into account the amount of elongation generated when the product is bent is added to the figure using the correction amount calculating means 4 based on the conditions specified by the expansion allowance condition input means 3.

Next, the graphic data correcting means 11 corrects the data of the connection portion using the combining position specified by the combining position specifying means 10 and the correction amount obtained by the correction amount calculating means. For example, in FIG. 28, the data (c and d in FIG. A, and e and f in FIG. B) connected to the combining point a are corrected to g and h. At this time, for example, a1 in FIG.
b1 is the connection point, and the correction amount (length a1b1 (=
g-ce)).

Then, in the developed view display means 12, the graphic data correction means
Convert the data corrected in 11 to graphic data and display it on the screen,
A prayer bend line i is displayed at the center of the combining point a1b1. After that, the developed figure 14 is created by displaying the dimension reference points j, k, l, m indicating the connection points.

The above is the case where the number of combining points is one. Next, the case where the number of combining points is two will be described. As shown in FIG. 29 (a), in the figure A1 and the figure B1 having two combining points, first, the combining
And b in FIG. B1. Next, after designating each condition, calculating the correction amount, and correcting the data in the same manner as in the case of one place, the graphic as shown in FIG. Is obtained.

Next, by repeating the synthesis of c of FIG. A1 and d of FIG. B1 in the same procedure as described above, the synthesis of the graphic shown in (d) is performed, and the synthesis of the connection part shown in (a) is obtained. Become.

[Problems to be solved by the invention]

Since the conventional development view creation method is performed as described above, when the connection point of a certain composite surface extends to two or more places or when the connection points are displaced from each other, the same operation is repeatedly performed to prepare the creator. In this case, it is necessary to obtain an intended figure or to create a development view by modifying the figure, so that the modification is not only troublesome but also the accuracy is not good.

Also, corners x and y as shown in FIG.
There is also a problem that if there is an error during the input of the extension allowance twice, the connection is not established.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a development view creating method that can combine a plurality of locations and a location having a misaligned connection with one operation. With the goal.

[Means for solving the problem]

According to a first aspect of the present invention, there is provided a development view creating method, wherein a plurality of figures to be combined with each other are displayed on a display means, and a material expansion / contraction allowance is provided between a certain face of the displayed figure and a combined face. In addition, a development view creation method for creating a development view representing a state in which the plurality of figures are combined with each other and connected to each other and connected to each other is characterized by including the following steps.

(A) a step of judging whether or not the combining position of each of the figures specified by the combining position designating unit is a place at which combining is possible, and if the combining position is a place that can be combined, accepting it as a combining place; While calculating each range that can be combined for each combination location of each of the figures specified by the means, the sides constituting the figure existing in each range are
(C) a correction amount calculation step of calculating a correction amount to be added when synthesizing the figure based on the data of the expansion / contraction allowance, A) generating a development view based on the correction amount obtained in the correction amount calculation step and the classified graphic data;

Further, the development view creating method according to the second invention displays a plurality of figures to be combined with each other on a display means, and sets a material expansion / contraction allowance between a surface of the displayed figure and a surface to be combined with the figure. In addition, a development view creation method for creating a development view representing a state in which the plurality of figures are combined with each other and facing each other and connected to each other is characterized by including the following steps.

(A) a step of judging whether or not the combining position of each of the figures specified by the combining position designating unit is a place at which combining is possible, and if the combining position is a place that can be combined, accepting it as a combining place; Calculating each range that can be combined for each combination point of each figure specified by the means, and combining the sides that make up the figure present in each range, when combining the sides that do not overlap at the combination location (C) a correction amount calculation step of calculating a correction amount to be taken into account when synthesizing the figure based on data of expansion and contraction, and (d) a correction amount calculation A step of generating a developed view based on the correction amount obtained in the step and the classified graphic data.

[Action]

In the first aspect of the invention, a correction function for creating a graphic to which a correction amount has been added by a combining method suitable for the classified data is used to simultaneously correct two or more connection points on the extension line.

Further, in the second invention, correction is simultaneously made at two or more connection points on the extension line that are displaced.

(Example of the invention)

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 1 is a processing configuration diagram of a method of creating a development view based on a two-dimensional object according to the first invention. In the figure, reference numeral 1 denotes which part of a figure drawn on a screen is connected. Means for designating several places (one or more places) can be designated at a time, and the combining means 2 finds a range in which combining places designated by the combining place designating means 1 can be combined at one time, and gives a characteristic to a figure corresponding to the range. Graphic data classifying means for classifying data, 3 and 4 are conventional expansion allowance condition input means and correction amount calculating means, and 5 is a correction amount calculating means by a synthesizing method suitable for the data classified by the graphic data classifying means 2. A data classification correction means 6 for correcting the data of the connection portion using the correction amount obtained in 4 is displayed on the screen as graphic data of the data corrected by the data classification correction means 5,
This is a developed view display means for displaying a bent line of a combined place or more, and a dimension reference point indicating a connection point.

FIG. 2 is an explanatory diagram of a development view creation method.
(A) is a perspective view of the product 7 to be developed, and (b) is a drawing showing the product 7 by a triangular projection or the like.
And FIG. B are drawn on the screen. (C) is a development view 8 of the product 7 created by each of the above means.

FIG. 3 is a block diagram showing a general example of an NC automatic programming apparatus for automatically creating a development view using a computer. In the figure, 110 is an arithmetic unit which is a central part of a computer, 111 is a graphic display device which displays characters and figures, 112 is a keyboard which is a device for inputting characters and numerical values, and 113 is coordinates of a mouse or the like which designates a combining position. The input means 114 is an NC data output device which outputs NC data in the form of an NC tape 115 or the like.

 Next, a method of creating a development view will be described.

In the embodiment as shown in FIG. 2, for the graphic A and the graphic B drawn on the screen of the display device 111 such as a CRT, the combined position specifying means 1 capable of specifying several connected portions on the extension lines is provided. First, the user selects (instructs) b of FIG. A and h of FIG. B with a pointing device such as a mouse as shown in FIG. Next, with respect to two or more combining point instructions, the instruction is accepted only for the connecting part on the extension line in the b2 direction based on the combining point designated first (for example, b in the figure A is b1 → b2). Because there is, the instruction of e can be performed. The same applies to the figure B, and the designation of the connection portion k on the extension line in the h2 direction is permitted. FIG. 5 shows a processing flow of the above-described combining portion designating means 1.

Next, a graphic data classification means (2) whose processing flow is shown in FIG. 6 is used. First, a range over which composition can be performed is determined so that two composition locations designated by the composition location designating means 1 can be composed at a time. In FIG. 4, since b1 of FIG. A is the basis, the point e2 which is the furthest distance from b1 on the extension of b1b2
(K2 in figure B). In FIG. 7, the portion C is excluded because there is no portion corresponding to the figure B on the right.
→ up to b2.

A graphic existing in the synthesis range, that is, a graphic A,
In FIG. 4, the sides constituting B are represented by a, a in FIG.
b, c, d, e, f, and g, h, i, j, k, l in FIG. Therefore, 12 figures are classified based on the characteristics of each figure. Here, the figures b, e, h, and k are connected parts with each other, and are named as composite planes.

Also, the figures a, c, d, f, g, i, j, l are connected to the above-mentioned composite plane, and are the end figures in the figures A and B, respectively. These are referred to as A-end figures and B-end figures. At this time, an end point connected to the composite plane is set as a starting point of the figure.

The product material, plate thickness,
After designating the conditions such as the degree of bending, the correction amount calculating means 4 is used to calculate the correction amount to be added to the figure from the stretching condition.

Next, the data-classifying correction means 5 will be described with reference to FIG. Here, the data of the connected portion is corrected by a correction line using the correction amount calculated by the correction amount calculating means 4. With respect to an end point of a certain combined plane, a connection part is created by searching for a B-end figure whose start point coincides with the end point and a correction line. At this time, if the end figure and the correction line are on a straight line, they are unified. Thereafter, in the same manner, the end point of the combined plane is searched for an A-end figure and a correction line whose start points coincide with each other, and a connection portion is created. In this way, the correction amount is inserted between the start point of the A-end figure and the start point of the B-end figure, and the connection on one side of the composite plane is terminated.

FIG. 9 shows an example of the connection between the A-end figure a and the B-end figure g. Since the A-end figure and the B-end figure are on a straight line as shown in FIG. One end figure m connecting the start points of the B end figure is assumed.

The above procedure is repeated by the number of endpoints of the composite surface to obtain one-end figures m, n, o, and p as shown in FIG.

The data corrected in this way is displayed in a developed view display means 6.
Is used to display graphic data on the screen, and using the data classified as the composite surface, a bent line is displayed at the 1/2 correction position and a dimension reference point indicating a connection point is displayed. An example of such a situation is shown in FIG. The two figures on the same line shown above can be easily formed by the coordinate input means 113 such as a mouse.

Next, a method for creating a development view based on a two-dimensional object according to the second invention will be described. FIG. 11 is a processing configuration diagram of the creation method. In the figure, the same parts as those in the first invention are denoted by the same reference numerals, and description thereof will be omitted.

2a determines a range that can be combined so as to combine all of the combining locations specified by the combining location designating means 1 at one time, and determines a connection deviation within the range (the connection portion length as shown in FIG. 13A and FIG. 13B). The figure data classification means for classifying and classifying data by giving characteristics to the figure generated by the difference between the figures is obtained by the correction amount calculation means 4 by the combining method corresponding to the data classified by the figure data classification means 2a. This is a data-classification-based correction unit that corrects data at a connection portion or data generated due to a connection deviation using a correction amount.

FIG. 12 is an explanatory diagram of a development view creating method,
(A) is a perspective view of a product 7a for creating a development view, and (b) is a drawing showing the product 7a by a triangular projection or the like, in which a graphic A and a graphic B of the product 7a are drawn on a screen. (C) is a development view 8a of the product 7a created by the above means.

The configuration of the automatic programming device for automatically creating a development view is the same as that of the embodiment of the first invention shown in FIG.

Next, a method of creating a development view of the product 7a as shown in FIG. 12 will be described.

In the embodiment as shown in FIG. 12, for the graphic A and the graphic B drawn on the screen of the display device 111 such as a CRT, the combining position specifying means 1 capable of specifying several connection portions on the extension lines is used. First, a of the figure A as shown in FIG.
And c of FIG. B are selected (pointed) with a pointing device such as a mouse. The composition is based on the first composition location designation for the figure. However, you can cancel it. Next, an explanation will be given of two or more combining point designations. The synthesis position specified at the first time (for example, in the figure A, a
Is based on a1 → a2), so in figure A,
The indication of the connection part b on the extension line in the a2 direction is permitted.
As long as there is a part to which this operation is to be connected, the instruction is repeated for the graphic A and the graphic B. FIG. 5 shows a processing flow of the above-described combining portion designating means 1.

Next, the graphic data classification means 2a shown in FIG. 14 is used.
First, a range that can be combined is determined so that two combining locations specified by the combining location designating means 1 can be combined at one time. As shown in FIG. 13, in the case of a graphic in which the connected parts do not overlap, the graphic is divided in order to extract the coincident part. B in FIG. A is divided into three figures e, f, and g. Of these, f has an overlapping portion with d of FIG. B, but there is no overlapping portion with FIG. B in e and g. The same applies to FIG. B, where c in FIG. B is divided into two figures h and i.

As a result, the synthesis range is determined based on a
Becomes (a1 → f2) up to the farthest point f overlapping figure B,
g is omitted. The figures existing in the synthesis range are a, e, f, j, k, and l in FIG.
h, i, n, o, p, q. Using the features of the figures as shown in FIG. 15, these figures are converted into a composite plane, a 1/2 correction plane, a composite end figure, and a 1/2 correction end figure for figures A and B according to FIG. Classify. As a result, the graphic shown in FIG. 12 is classified as shown in FIG. 13, and the graphic shown in FIG. 16 is classified as shown in FIG.

The product material, plate thickness,
After designating the bending conditions such as the bending angle, the correction amount calculating means 4 is used to calculate the correction amount to be added to the figure from the elongation allowance condition.

Next, the data-classifying correction means 5a will be described with reference to FIG. First, a correction line having a length corresponding to the correction amount calculated by the correction amount calculating means 4 is created at an end point of the combined surface, such as r, s, t, u in FIG. Next, figure data classification means
Correction is performed on the composite end figure classified in 2a. As shown in FIG. 20, the data of the connected portion is corrected by using a correction line having an end point coincident with the start point (the end point of the synthesized surface) of the synthesized end figure. When the classification result is as shown in FIG. 13, the correction of the composite end graphic I is as shown in FIG. The same applies to the composite end figure II, as shown in FIG.

Next, the 1/2 correction plane I or I
In the case of classification into I, the correction of the 1/2 correction plane is performed using the correction method shown in FIG.

For example, the correction line is corrected at the 1/2 correction position as shown in FIG. Next, when the 1/2 correction plane is I, 1
Since the / 2 correction end figure exists, as shown in Fig. 22,
According to the correction method shown in the figure, the 1/2 correction position
Modify the figure at the intersection of the 1/2 corrected end figure.

As described above, the connection portion is created by adding the correction for the classification data to the graphic A and the graphic B.

The data corrected in this manner is displayed on the screen as graphic data as shown in FIG. 25 using the developed view display means 6 as shown in FIG. Then, the composite surface classified by the graphic data classification means 2a is moved to a half position and displayed as a bending line. In addition, a dimension reference point is displayed as a connection point so as to indicate the shape of the figure before synthesis. FIG. 12 (c) shows an example of a developed view created in this way.

In the above embodiment, the elongation correction has been described.
Depending on the written drawing dimensions, the surface-to-surface elongation may be negative, but the shrinkage correction may be performed, and the same effects as those of the above embodiment can be obtained.

Further, in the above-described embodiment, the graphic connected with the straight line data in the correction direction has been described. However, the same effect as in the above embodiment can be obtained in connection with other straight line data or connection with arc data.

In the above embodiment, data having two connection points has been described.
Since the connection points and above are a combination of two connections and one connection, the same effects as in the above embodiment can be obtained.

〔The invention's effect〕

As described above, according to the present invention, a plurality of graphics to be combined with each other are displayed on the display means, and a material expansion / contraction margin is added between a surface having the displayed graphics and a surface to be combined with the plurality of graphics. In a development view creation method for creating a development view showing a state in which the figures are combined with each other and connected to each other, the following steps are performed: (a) the above-mentioned figures designated by the combination location designation means; A step of judging whether or not the combining part is a place that can be combined and, if it is a place that can be combined, accepting it as a combining part; (b) combining can be performed for each combining part of each figure indicated by the combining part designating means In addition to calculating each range, the sides that constitute the figure in each range are
(C) a correction amount calculating step of calculating a correction amount to be added when synthesizing the figure based on the data of the expansion / contraction allowance, Generating a development view based on the correction amount obtained in the correction amount calculation step and the classified graphic data, so that a plurality of connection portions existing on an extension of the graphic are designated. Calculate the synthesis range of each figure, classify the figure data existing within the range, calculate the amount of correction to be added to the figure from the condition of elongation allowance of material, correct the combined data of figures,
Since the developed view is displayed using the graphic data based on the corrected data and the graphic data classified as described above,
Even if there are two or more connection points in the displayed figure, the figure data intended by the creator can be correctly created by a single input designation.

Also, a plurality of figures to be combined with each other are displayed on the display means, and a material expansion / contraction margin is added between a surface of the displayed figure and a surface to be combined with the displayed figure, so that the plurality of figures are opposed to each other. In a development view creation method for creating a development view representing a state of being connected and connected with each other, the following steps are performed: (a) whether a combination location of each of the above figures specified by the combination location designating means can be combined; Judging whether or not it is possible to combine, if it is a place that can be combined, accepting it as a combined place; (b) determining each range that can be combined for each combined place of each figure specified by the combining place designating means; (C) elongating, when composing the sides constituting the graphic present in each range, into the overlapping side and the non-overlapping side at the composing location, and classifying into the end figure connected to each side; A correction amount calculating step of calculating a correction amount to be taken into account when synthesizing the figure based on the data of the alternative, and (d) a development view based on the correction amount obtained in the correction amount calculating step and the classified figure data. And the step of generating the graphic data. Therefore, even if the connection points of the graphics are shifted from each other, the graphics data can be correctly created by a single input designation, and the time required for the correction does not take much time. There is an effect that a diagram creation method can be obtained.

[Brief description of the drawings]

FIG. 1 is a processing configuration diagram of a development view creation method according to an embodiment of the first invention, FIG. 2 is a view for explaining the creation method according to the first invention, (a) is a perspective view of a product, (b) is a diagram showing the product by a triangular projection, and (c) is a developed view of the product.
FIG. 3 is a block diagram of an apparatus used in the method according to the first and second inventions, FIGS. 4 and 7 are diagrams for explaining the processing procedure according to the method of the first invention, and FIG. Second
Flow chart of the synthesis position indicating means of the method according to the invention of the invention,
FIG. 6 is a processing flow chart of the graphic data classification means, FIG. 8 is a processing flow chart of the data classification-dependent correction means, and FIGS. 9 and 10 are diagrams for explaining an example of graphic generation according to the present invention. FIG. 11 is a processing configuration diagram of a development view creation method according to an embodiment of the second invention, FIG. 12 is a view for explaining the creation method according to the second invention, (a) is a perspective view of a product, (B)
Is a diagram showing a product by a triangular projection, and (c) is a developed view of the product. FIG. 13, FIG. 19, FIG. 21, FIG. 22, and FIG. 25 are diagrams for explaining the processing procedure by the method of the second invention.
FIG. 15 is a processing flow diagram of the graphic data classification means according to the second invention, FIG. 15 is a diagram showing characteristics of classified data of the method according to the second invention, and FIGS. 16 and 17 are diagrams of the second invention. FIG. 18 is a view for explaining a modification, FIG. 18 is a processing flowchart of a data classification-dependent correcting means according to the second invention, FIG. 20 is a view showing a graphic correction method according to the second invention, and FIG. FIG. 24 is a diagram showing a correction method of a correction surface according to the invention, FIG. 24 is a diagram showing a processing flow of a development view display means and a display example according to the second invention,
FIG. 26 is a processing configuration diagram according to a conventional development view creating method, and FIG.
FIGS. 1A and 1B are diagrams for explaining a conventional method, in which FIG. 1A is a perspective view of a product, FIG.
(C) shows a development view of the product. FIG. 28 and FIG. 29 are diagrams for explaining the processing procedure by the conventional method. In the drawing, reference numeral 1 denotes a combination location designating means, 2, 2a denote graphic data classification means, 5, 5a denote correction means by data classification, 6 is a development view display means, 7, 7a is a product, and 8, 8a are development views. . In the drawings, the same reference numerals indicate the same or corresponding parts.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hisakazu Nishikawa 5-1-1-14 Yadaminami, Higashi-ku, Nagoya-shi, Aichi Mitsubishi Electric Corporation Nagoya Works (56) References JP-A-59-47029 (JP, A )

Claims (2)

(57) [Claims] 1. A display means displays a plurality of figures to be combined with each other, and adds an expansion / contraction allowance of a material between a certain surface of the displayed figure and a surface to be combined with the displayed figure, so that the plurality of figures are opposed to each other. A method for creating a development view showing a state in which images are combined and connected by each other, comprising the following steps. (A) a step of judging whether or not the combining position of each of the figures specified by the combining position designating unit is a place at which combining is possible, and if the combining position is a place that can be combined, accepting it as a combining place; While calculating each range that can be combined for each combination location of each of the figures specified by the means, the sides constituting the figure existing in each range are
(C) a correction amount calculation step of calculating a correction amount to be added when synthesizing the figure based on the data of the expansion / contraction allowance, A) generating a development view based on the correction amount obtained in the correction amount calculation step and the classified graphic data; 2. A plurality of figures to be combined with each other are displayed on a display means, and an extension or contraction of a material is added between a surface of the displayed figure and a surface to be combined with the figure, so that the plurality of figures are opposed to each other. A method for creating a development view showing a state in which images are combined and connected by each other, comprising the following steps. (A) a step of judging whether or not the combining position of each of the figures specified by the combining position designating unit is a place at which combining is possible, and if the combining position is a place that can be combined, accepting it as a combining place; Calculating each range that can be combined for each combination point of each figure specified by the means, and combining the sides that make up the figure present in each range, when combining the sides that do not overlap at the combination location (C) a correction amount calculation step of calculating a correction amount to be taken into account when synthesizing the figure based on data of expansion and contraction, and (d) a correction amount calculation A step of generating a developed view based on the correction amount obtained in the step and the classified graphic data.