JP2008146570A - Processing data generation device and processing data generation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing data generation device and a processing data generation method, which can output processing data only by inputting the coordinate data. <P>SOLUTION: Processing data can be generated, by inputting coordinate data of a start point and an end point of each of straight line components f1-f4 from a design drawing of a piping (SP1), finding each line vector and normal vector (SP2), finding a bending angle which each of straight line components forms (SP3), finding a twist angle from twist directions (SP5, SP6) by determining the area where a bending intersection point exists (SP4), and calculating the entire length (SP7). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a machining data creation device and a machining data creation method for creating machining data when machining a metal pipe into a three-dimensional pipe, for example.

  In a nuclear power plant, a thermal power plant, etc., piping formed in a complicated three-dimensional shape is set up. In order to manufacture such a pipe, it is necessary to extract data for specifically manufacturing from the design drawing.

One example of determining the object shape method is described in Japanese Patent Laid-Open No. 8-339450 (Patent Document 1). In the method for determining the shape of an object described in Patent Document 1, the contour of an object is detected, the contour of the object is converted into a contour function independent of the position of the object, and the contour function is preliminarily obtained with respect to a known shape. It is described to determine the shape in comparison with a defined reference contour function.
JP-A-8-339450

  The object shape determination method described in Patent Document 1 is based on the premise that an object exists, and does not determine the shape by inputting data, and cannot output machining data.

  The complicated piping has a three-dimensional shape, and it is necessary to calculate the bending angle and the twist angle in order to process the metal tube by bending or twisting it with a pipe bender from the design drawing. Conventionally, numerical data is calculated by hand calculation, and there is a problem that it takes time for the calculation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a machining data creation device and a machining data creation method capable of outputting three-dimensional machining data simply by inputting coordinate data.

  The present invention is a processing data creation device for processing a metal pipe into a three-dimensional shape pipe, input means for inputting coordinate data indicating the position of the intersection of each linear component forming the shape of the pipe, Based on the coordinate data indicating the position of the intersection of each straight line component input from the input means, an angle calculation means for calculating the bending angle and the helix angle formed by each intersection, and the intersection of each straight line component input from the input means And a total length calculating means for calculating the total length of the pipe based on the coordinate data indicating the position of the pipe and the calculated bending angle.

  In the present invention, the bending angle, the twist angle, and the total length can be calculated in a short time just by inputting the coordinate data of each linear component, so that manual calculation is unnecessary as in the prior art.

  Preferably, the input means is for the user to input coordinate data indicating the position of the intersection of each linear component, and the angle calculation means is the coordinate data indicating the position of the intersection of each linear component input from the input means. The line segment vector and the normal vector of each straight line component are calculated based on the above, and the bending angle and the helix angle formed by each straight line component are calculated.

  Preferably, an area in the three-dimensional space where the intersection of each straight line component exists is determined, and the slack direction is determined.

  Preferably, any one of the linear components is bent with a predetermined arc, and the total length calculation means obtains the length of the predetermined arc portion based on the bending radius and the bending angle of the arc. .

  Another aspect of the present invention is a processing data creation method for processing a metal pipe into a three-dimensional pipe, the step of inputting coordinate data indicating the position of the intersection of each linear component forming the pipe shape; A step of calculating a bending angle and a heel angle formed by each intersection based on the coordinate data indicating the position of the intersection of each linear component, and coordinate data indicating the position of the intersection of each input linear component; And calculating the total length of the pipe based on the calculated bending angle.

  According to the present invention, only by inputting coordinate data indicating the position of the intersection of each straight line component forming the shape of the pipe, the bending angle and the helix angle formed by each cross point are calculated, and the input linear component of each straight line component is calculated. Since the total length of the pipe can be calculated based on the coordinate data indicating the position of the intersection and the calculated bending angle, three-dimensional machining data can be created.

  FIG. 1 is a block diagram of a machining data creation device 1 according to an embodiment of the present invention. In FIG. 1, a machining data creation device 1 includes a control unit 2 that operates as an angle calculation unit and a full length calculation unit, an input unit 3 that operates as an input unit, a memory 4, a display unit 5, and an output unit 6. Including. The control unit 2 is configured by a computer, the input unit 3 includes, for example, a keyboard and a mouse, and the memory 4 is configured by a hard disk (HDD). For example, a liquid crystal display or the like is used as the display unit 5, and the output unit 6 is configured by a printer or the like, for example.

  FIG. 2 is a diagram showing an example of the piping 10 created by the machining data creation device 1 according to an embodiment of the present invention, and FIG. 3 explains a method for determining the area of the piping 10 shown in FIG. 4 is a diagram showing a method of calculating the total length of the pipe, FIG. 5 is a diagram showing coordinate data and machining data, and FIG. 6 is a machining according to an embodiment of the present invention. 4 is a flowchart for explaining an operation of creating machining data by the data creation device 1.

  In FIG. 2, a pipe 10 is manufactured by bending a straight metal pipe or the like, and the metal pipe is bent by a pipe bender. When bending various pipes into a three-dimensional shape, the pipe bender performs processing by numerically controlling (three-axis NC control) the feed length, the twist angle, and the bending angle. For this reason, it is necessary to give the feed length, the kinley angle, and the bending angle as machining data.

  Therefore, the machining data is calculated by the machining data creation device 1 shown in FIG. As shown in FIG. 2, the pipe 10 includes linear components f1, f2, and f3, the linear components f1 and f2 are bent at a bending angle β1, and the linear components f2 and f3 are bent at a bending angle β2. And As shown in FIG. 5A, the coordinate data of the respective start points or end points F1, F2, F3, F4 of the respective linear components f1, f2, f3, f4 are F1 (x1, y1, z1), F2 (x2 , Y2, z2), F3 (x3, y3, z3), and F4 (x4, y4, z4). F2 and F3 are also intersections of the pipe 10. In order to process the pipe 10 from the coordinate data, each of the feed length, arc length, twist angle, and bending angle data shown in FIG. 5B is calculated based on the flowchart shown in FIG.

  The user inputs the coordinate data of the start point or the end points F1, F2, F3, and F4 shown in FIG. When the control unit 2 determines in step SP1 that the coordinate data is input in step (abbreviated as SP in the drawing), in step SP2, the line segment vectors F1F2, F2F3, F3F4 of the linear components f1, f2, f3 Calculate the normal vector. In step SP3, the bending angles β1, β2 of the straight line components f1, f2, f3 are calculated based on the line segment vectors and the normal vector.

  In step SP4, region determination is performed in order to determine the direction of slapping. In the area determination, as shown in FIG. 2, a plane S including the straight line components f1 and f2 and a plane K including the straight line component f2 and perpendicular to the plane S are defined. The plane S is parallel to the linear component f1 and extends in a direction orthogonal to the paper surface, and the plane K extends in a direction orthogonal to the plane S and orthogonal to the paper surface as indicated by a dotted line.

  FIG. 3 shows four patterns as an example for determining the region. 3A to 3D, when the straight line component f1 is viewed from the plane S, the straight line component f2 extends in a direction orthogonal to the paper surface, and the start point or the end points F2 and F3 are shown at the same position. . In the area determination, it is determined whether the positional relationship between the start point F1 and the end point F4 is above or below the plane S, right or left from the plane K with respect to the paper surface.

  In the example shown in FIG. 3A, the end point F4 is above the plane S on the paper surface and to the left of the plane K. In the example shown in FIG. 3B, the end point F4 is above the plane S and to the right of the plane K. In the example shown in FIG. 3C, the end point F4 is below the plane S and to the right of the plane K. In the example shown in FIG. 3D, the end point F4 is below the plane S and to the left of the plane K.

  After determining the region in this way, in step SP5, the twist angle is calculated. That is, in the example shown in FIG. 3 (A), the twist angle α1 of f2 with respect to the linear component f1 is calculated, and in the example shown in FIG. 3 (B), the twist angle α2 is calculated and shown in FIG. 3 (C). In the example, the twist angle α3 is calculated, and in the example shown in FIG. 3D, the twist angle α4 is calculated.

  In step SP6, the slack direction is determined. In the example shown in FIG. 3A, it is determined that the counterclockwise twist. In this example, twisting 360-α1 in the clockwise direction gives the same result as twisting α1 in the counterclockwise direction, but the metal tube may interfere with the floor when twisting over 180 degrees. The fin direction is determined to be counterclockwise. In the examples shown in FIGS. 3B, 3 </ b> C, and 3 </ b> D, the twist angle is 180 degrees or less, so that the twist is performed in the clockwise direction.

  In step SP7, the total length is calculated. The total length of the pipe 10 shown in FIG. 2 when machining is the total value of the line segment vectors of the linear components f1, f2, and f3. However, as shown in FIG. 4, it is assumed that, for example, a portion between the linear components f2 and f3 is bent with an arc of a radius R. In this case, it is necessary to calculate the length r1 of the bent arc portion. Therefore, as shown in FIG. 4 from the bending radius R and the bending angle β2, the length L1 from the connection point between the linear component f2 and the arc portion to F3, and the connection point between the linear component f3 and the arc portion to F3. Is calculated. Then, the total length L is calculated by subtracting the length of L1 + L2 from the total value of the length of the linear component f2 and the length of the linear component f3, and adding the length r1 of the arc portion.

  At this time, a length o1 obtained by subtracting r1 / 2 from the linear component f1 is a feed length for the linear component f1, and a length o2 obtained by subtracting r1 / 2 from the linear component f2 is a feed length for the linear component f2. As shown in FIG. 5B, the total length of each linear component f1 to f3 is represented by a sum obtained by adding each feed length and each arc length. The machining data calculated in this way is stored in the memory 4 under the control of the control unit 2, and the machining data is displayed on the display unit 5 or output by the user operating the input unit 3 as necessary. The processing data can be printed by the unit 6. In FIG. 5B, the initial setting position SL is an initial position when the metal pipe is set on the pipe bender as shown in FIG.

  When the pipe 10 is actually processed, the metal tube is cut to the full length obtained, the cut metal tube is attached to a pipe bender, and the obtained feed length, arc length, helix angle, bending angle Can be bent into the three-dimensional shape shown in FIG. 2 by NC control.

  As described above, according to one embodiment of the present invention, the coordinate data of each linear component f1 to f4 is input to obtain a line segment vector and a normal vector, the bending angle formed by each linear component is obtained, the bending Machining data can be automatically created by discriminating the region where the intersection exists, obtaining the shining angle from the shining direction, and calculating the total length. Then, the length of the metal tube is cut to the total length obtained, the metal tube is attached to the pipe bender, and the desired feed length, arc length, helix angle and bending angle are simply input to the pipe bender. A pipe having a three-dimensional shape can be processed.

  In the above description, the present invention is applied to the processing data creation device or the processing data creation method when manufacturing piping for thermal power plants or nuclear power plants, but the present invention is also applied to processing other piping. Can be applied.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The processing data creation device of the present invention can be advantageously used for bending metal pipes with a pipe bender.

It is a block diagram of the processing data creation device in one embodiment of this invention. It is a figure showing an example of piping created with the processing data creation device in one embodiment of this invention. It is a figure for demonstrating the method to determine the area | region where the bending intersection of piping shown in FIG. 2 exists. It is a figure which shows the method of calculating the full length of piping. It is a figure which shows coordinate data and process data. It is a flowchart for demonstrating the operation | movement which produces machining data with the machining data creation apparatus of one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Processing data preparation apparatus, 2 Control part, 3 input part, 4 memory, 5 display part, 6 output part, f1-f3 linear component, F1-F4 start point or end point, (beta) 1, (beta) 2 bending angle, (alpha) 1- (alpha) 4 helix angle, o1, o2 feed length, r1 arc.

Claims (5)

A processing data creation device for processing a metal pipe into a three-dimensional pipe,
Input means for inputting coordinate data indicating the position of the intersection of each linear component forming the shape of the pipe;
Based on coordinate data indicating the position of the intersection of each straight line component input from the input means, an angle calculation means for calculating a bending angle and a twist angle formed by each intersection;
A machining data creation device comprising: coordinate data indicating the position of the intersection of each straight line component input from the input means; and a total length calculation means for calculating the total length of the pipe based on the calculated bending angle. . The input means is for the user to input coordinate data indicating the position of the intersection of each linear component,
The angle calculation unit calculates a line segment vector and a normal vector of each linear component based on coordinate data indicating the position of the intersection of each linear component input from the input unit, and each linear component is formed. The processing data creation device according to claim 1, wherein the bending angle and the twist angle are calculated.   The machining data creation device according to claim 1 or 2, wherein an area in a three-dimensional space where an intersection of each straight line component exists is determined, and the direction of the slack is determined. Any one of the linear components is bent with a predetermined arc,
The processing data creation device according to any one of claims 1 to 3, wherein the full length calculation means obtains a length of the predetermined arc portion based on a bending radius and a bending angle of the arc. A processing data creation method for processing a metal pipe into a three-dimensional pipe,
Inputting coordinate data indicating the position of the intersection of each linear component forming the shape of the pipe;
Calculating a bending angle and a shining angle formed by each intersection based on the coordinate data indicating the position of the intersection of each input linear component;
A machining data creation method, comprising: calculating coordinate data indicating a position of an intersection of the input linear components and calculating a total length of the pipe based on the calculated bending angle.

Images