JP5899827B2 - Plate gap correction method and plate gap correction device - Google Patents

Description

The present invention relates to a method for correcting a gap in which a plurality of parts to be welded at predetermined points are modeled by a shell element, a weld is modeled by a 1D element, and a gap that is the length dimension of the 1D element is corrected. The present invention relates to a plate gap correction device.

  Conventionally, car body parts and the like are designed based on Computer Aided Design (CAD) data. Such CAD data is also used for purposes other than design. For example, in Patent Document 1, the time required for repairing a mold is shortened by using CAD data for repairing the mold.

  CAD data is also used in analysis by Computer Aided Engineering (CAE). In this case, the CAD data is modeled with a shell element using a finite element method (FEM) and used for analysis (for example, life prediction) of a spot weld formed on a body part. It is done.

A part modeled by a shell element is two-dimensionally represented in a form having no thickness with a predetermined location (for example, the center of the thickness of the part) as a reference plane (see FIG. 2). As shown in FIG. 19A, the welded portion is represented one-dimensionally as a 1D element that connects the planar portions of two parts. The gap which is the length dimension of such a 1D element is defined based on the thickness of the part corresponding to the flat part of the part.
Therefore, when the plate thickness is changed by a design change, it is necessary to move (or deform) the CAD data or the plane portion of the shell element model to correct the plate gap so that the specified length dimension is obtained. There is.

  Patent Document 1 does not disclose a means for correcting CAD data in consideration of such a gap. Therefore, when CAD data of a part where a weld is to be formed is used for analysis by CAE, it is necessary to manually correct the gap when changing the design.

When manually correcting the gap, the plane portion to be moved is determined by the judgment of the operator or the like.
For example, as shown in FIG. 19 (a) and FIG. 19 (b), when correcting the upper and lower plate gaps continuously interposed in the three plane portions, the top plane portion is moved. Then, the upper clearance is corrected (refer to “spacing OK” shown in FIG. 19B). After that, as shown in FIG. 19C, when the lower plate gap is corrected by moving the upper and lower flat portions, the upper plate gap also changes. Therefore, the corrected upper gap is corrected again (see “Gap NG” shown in FIG. 19C).

  That is, in the prior art, it is necessary to manually correct the gap, and in this case, it is necessary to consider the relationship between the planar portions so that the correction at one location does not affect the other locations. In particular, in the correction of a gap in a part in which a large flat portion is formed or a part having many hit points, it is easy to redo due to oversight or the like, and a lot of man-hours are required to correct the gap.

JP 2010-207884 A

  The present invention has been made in view of the above situation, and provides a plate gap correction method capable of correcting a plate gap in a short time.

According to claim 1, a plate having a length dimension of the 1D element, wherein a plurality of parts to be welded at a predetermined spot are modeled by a shell element and a welded part is modeled by a 1D element by a sheet gap correcting device. A gap correction method for correcting a gap , wherein a plane portion detection step of detecting a plane portion including the hitting point from the shell element model by a plane portion detection means of the gap clearance correction device; and By the grouping means , based on the detected plane portion and the 1D element, a grouping step for grouping the plane portions interposing the 1D element as one group, and by the order determining means of the plate gap correcting device , in the plane portion belonging to said group, one of the flat portions is set as a reference plane portion, based on the reference plane section, move the plane portion belonging to the group The order in which the order determination step of determining for each said group, performs, those.

According to a second aspect of the present invention, in the order determining step, the order determining unit sets a plane part having the largest area among the plane parts belonging to the group as the reference plane part.

According to a third aspect of the present invention , a correction step of correcting the plate gap by moving the planar portion based on the determined movement order by the correction means of the plate gap correction device is further performed.

According to a fourth aspect of the present invention, a correction amount information acquisition step of calculating the correction amount of the plate gap is further performed by a correction amount information acquisition unit of the plate gap correction device .

  In claim 5, a plurality of parts to be welded at a predetermined spot are modeled by a shell element, a welded part is modeled by a 1D element, and a gap that is a length dimension of the 1D element is corrected. Based on the detected plane portion and the 1D element, the plane portion where the 1D element interposes is determined based on the plane portion detecting means for detecting the plane portion including the hit point from the shell element model. Grouping means for grouping as one group, and among the plane parts belonging to the group, one plane part is set as a reference plane part, and the plane part belonging to the group is set with reference to the reference plane part. Order determining means for determining the order of movement for each group.

  According to a sixth aspect of the present invention, the order determining means sets, as the reference plane portion, a plane portion having the largest area among the plane portions belonging to the group.

In claim 7, based on the movement sequence of the determined moving the flat portion, modifying means for modifying the plate gap, comprising the further, and is intended.

  The present invention further includes correction amount information acquisition means for calculating the correction amount of the gap.

  The present invention can prevent redo due to oversight or the like, and thus has an effect of correcting the gap in a short time.

Explanatory drawing which shows the structure of a board clearance correction apparatus. Explanatory drawing explaining a shell element model. The figure which shows 1D element. The figure which shows the procedure of the board clearance correction method. The schematic diagram regarding acquisition of the node information corresponding to 1D element. Explanatory drawing regarding the detection of the plane part containing a hit point. The figure which shows the state which detected the plane part. The figure which shows the procedure of grouping. The figure which shows the state before grouping. The figure which shows the state after grouping. The figure regarding a movement order. (A) The figure which shows the plane part which the movement order determined. (B) The figure which shows a movement order. The figure which shows typically the state which corrects a board gap. The figure which shows a transition part. The figure which shows the procedure of the clearance gap correction method of a 1st modification. The figure which shows CAD data of components typically. The figure which shows the state which corrects a board clearance with the CAD data of components. The figure which shows the procedure of the board clearance correction method of a 2nd modification. The figure which shows typically the state in which a level | step difference is formed at the time of the movement of a plane part. The figure which shows the correction | amendment work of the board clearance by manual labor. (A) The figure which shows the state before correction. (B) The figure which shows the state which corrects a board gap. (C) The figure which shows the state in which redo occurs.

  Below, the plate gap correction method of this embodiment will be described.

  The clearance correction method is used when, for example, a computer aided engineering (CAE) is used to analyze a weld 31 that joins a plurality of parts 30 (see FIG. 3). Such CAE analysis includes, for example, life prediction of the welded portion 31.

The component 30 constitutes, for example, a car body of an automobile, and is welded at a predetermined spot P (spot welding is performed) and joined together as shown in FIG. That is, the welded portion 31 is formed in the part 30 at a position corresponding to the hit point P.
Such a part 30 to be joined is designed based on Computer Aided Design (CAD) data.

  In the analysis by CAE, CAD data of the part 30 is modeled as a shell element model 40 by using a finite element method (Finite Element Method (FEM)).

The shell element model 40 is obtained by modeling CAD data of a part 30 with a plurality of shell elements 50 using a predetermined location (the upper surface of the part 30 in FIG. 2) as a reference plane.
The shell element 50 is a two-dimensional element formed in a triangular shape or a quadrangular shape by connecting a plurality of nodes 70 arranged on the reference plane with straight lines.

That is, the shell element model 40 represents the component 30 in a form having no thickness.
Therefore, when CAD data of the part 30 is modeled by the shell element 50, a gap is formed between the shell element models 40.

As shown in FIG. 3, in the analysis by CAE, a node 70 is arranged at a position corresponding to the hit point P, and a 1D element 100 (for example, a beam element or a rigid element) that connects a plurality of nodes 70 with a straight line is generated. . That is, in the analysis by CAE, the welded portion 31 is modeled by the 1D element 100.
In the analysis by CAE, the length dimension of the 1D element 100 is defined based on the plate thickness L1 and L2 of the component 30 (plate thickness of the flat portion formed in the vicinity of the hit point P and its vicinity).

For example, in the life prediction of the welded portion 31 by CAE, it is evaluated how the external force F acts on the 1D element 100 when the external force F (shear load in FIG. 3) acts on the component 30.
If the length dimension of the 1D element 100 is not the prescribed length dimension (hereinafter referred to as “defined dimension”), the analysis accuracy by CAE will deteriorate. That is, in order to obtain a correct analysis result, it is necessary to make the 1D element 100 correspond to the specified dimension.

  Therefore, when the plate thickness L1 or L2 of the component 30 is changed by design change, the length dimension of the 1D element 100 needs to be corrected.

The sheet clearance correction method corrects the length dimension of all the 1D elements 100 to a specified dimension.
In the present embodiment, the “plate gap” is the length dimension of the 1D element 100.

  Hereinafter, the work for correcting all the gaps will be referred to as “blade gap correction work”.

  In the clearance correction method, the clearance correction operation is performed using the clearance correction device 10 shown in FIG. The clearance correction apparatus 10 is configured to be able to execute various arithmetic processes related to clearance clearance correction work by executing a predetermined program on a commercially available personal computer or the like.

The board clearance correction device 10 acquires, for example, the CAD data of the part 30 and the position information of the hit point P from the design unit 20 that designs the part 30 based on the CAD data (see arrow R shown in FIG. 1).
The position information of the hit point P is three-dimensional information indicating which part 30 is to be joined at which position by a gun or the like of a spot welding apparatus, and is set as a three-dimensional coordinate value for each part 30 (see FIG. 5). (See dot P shown).

As shown in FIG. 2, the sheet clearance correction device 10 models CAD data of the component 30 with a shell element 50 using a finite element method. Then, the sheet clearance correction device 10 performs various processes on the shell element model 40 by using the functions related to the sheet clearance correction method to perform the sheet clearance correction work (see FIG. 12).
The clearance correction apparatus 10 includes a check unit 11, a plane detection unit 12, a grouping unit 13, an order determination unit 14, and a moving unit 15 as functions related to the clearance correction method.

  The check unit 11 calculates a clearance and determines whether the calculated clearance is a specified dimension. The check unit 11 is configured to be able to calculate the correction amount of the plate gap based on the calculated plate gap and the specified dimension.

  The plane detection unit 12 detects the plane part 80 including the hit point P in the shell element model 40 based on the position information of the hit point P (see FIG. 7). Specific processing of the plane detection unit 12 will be described later.

  The grouping unit 13 groups the plane parts 80 detected by the plane detection unit 12 (see groups A and B shown in FIG. 10). Specific processing of the grouping unit 13 will be described later.

  The order determination unit 14 determines, for each group, the order in which the plane units 80 grouped by the grouping unit 13 are moved (see FIG. 11B). Specific processing of the order determination unit 14 will be described later.

  The movement part 15 adjusts the distance between the plane parts 80 based on the movement order determined by the order determination part 14 (refer FIG. 12).

That is, when the plane detection unit 12 detects the entire shell element model 40 of the substantially plate-like component 30 as shown in FIG. 2 as the plane unit 80, the moving unit 15 moves the shell element model 40 as a whole. Then, the distance between the plane portions 80 is adjusted.
In addition, when the plane detection unit 12 does not detect the entire shell element model 40 as illustrated in FIG. 12 as the plane unit 80, the moving unit 15 does not move the shell element model 40 as a whole, The plane part 80 is deformed to adjust the distance between the plane parts 80.

  Hereinafter, such adjustment of the distance between the plane portions 80 by the moving portion 15 is referred to as “moving the plane portion 80”.

  Next, the procedure of the plate gap correction method will be described.

  When performing the clearance correction method, the clearance correction device 10 acquires the CAD data of the component 30 and the position information of the hit point P from the design unit 20 to generate the shell element model 40 of the component 30 (FIG. 2). reference).

  First, in the clearance correction method, as shown in FIG. 4, node information corresponding to the 1D element 100 is acquired (S110).

That is, the plate gap correction device 10 recreates the shell element 50 in the vicinity of the hit point P so that the hit point P is positioned at the node 70 of the shell element 50 as shown in FIG.
Then, the shell element model 40 is combined based on the position information of the hit point P. For example, when three shell element models 40A, 40B, and 40C as shown in FIG. 5 are generated, the shell element models 40A, 40B, and 40C are overlapped.
Thereafter, as shown in FIG. 3, the plate clearance correction device 10 generates the 1D element 100 by connecting the nodes 70 corresponding to the hit points P based on the positional information of the hit points P.

  5 and 7, the shell element 50 is not shown for easy viewing of the drawings.

  The board clearance correction device 10 acquires node information corresponding to the 1D element 100 generated in this way (that is, information indicating the relationship between the 1D element 100 and the node 70) in step S110.

  In step S110, it is not always necessary to recreate the shell element 50. For example, the 1D element 100 may be generated at an arbitrary position of the shell element 50 where the hit point P is located. However, it is preferable to recreate the shell element 50 from the viewpoint that the processing of the plate gap correction work can be easily performed.

After acquiring the node information corresponding to the 1D element 100, as shown in FIG. 4, the plate gap correction device 10 checks the plate gap using the check unit 11 (S120).
That is, the check unit 11 calculates a gap by detecting a plane portion near the hit point P in the shell element model 40 and measuring a distance between the planes. And the check part 11 confirms whether the calculated clearance gap is a regulation dimension (refer FIG. 3). The check unit 11 performs such confirmation for all the gaps.

  The procedure for checking the gap is not limited to this embodiment, and the gap may be calculated by calculating the distance between the nodes corresponding to the 1D element 100, for example.

  If all the gaps are in the correct state by checking the gaps, the gap correction device 10 determines that there is no need to perform the gap correction operation (S120: Yes). In this case, the clearance clearance correction device 10 ends the clearance clearance correction operation.

  If one or more gaps are not in the correct state by checking the gap (see FIG. 19A), the gap correction device 10 performs the gap correction operation as follows (S120: No).

  First, as shown in FIGS. 4 and 6, the plate gap correction device 10 detects the plane portion 80 including the hit point P from the shell element model 40 by the plane detection unit 12 (S 130).

  The flat surface portion 80 including the hit point P includes a shell element (shell elements 51 to 54) including a node 70 corresponding to the hit point P (node 70 shown in black) and a shell element (shell shell) smoothly aligned with the shell element. Elements 59 to 61).

For example, when detecting the plane part 80 including the hit point P from the shell element model 40 as illustrated in FIG. 6, the plane detection unit 12 includes the shell elements 51 to 54 including the node 70 corresponding to the hit point P, and the shell element 51. -54 and the angle formed by the adjacent shell elements 55-60 are calculated. Then, the plane detection unit 12 determines whether the calculated angle is within a predetermined range (for example, whether it is within a range of 180 degrees to several degrees).
Thereby, the plane detection unit 12 determines that the shell elements 59 and 60 within the predetermined range are shell elements constituting the plane part 80 including the hit point P.

The plane detection unit 12 similarly determines the angle formed with the adjacent shell elements 61 to 63 for the shell elements 59 and 60 that are determined to be shell elements constituting the plane unit 80. The plane detection unit 12 recursively determines the angles of the shell elements constituting the plane unit 80.
Thereby, the plane detection unit 12 detects a portion constituted by the shell elements 51 to 54 and the shell elements 59 to 61 as the plane part 80 including the hit point P.

  If a plurality of hit points P are set in a part detected as one plane part 80 by the plane detection unit 12 as in the shell element model 40B shown in FIG. 7, the number of plane parts 80 detected is The number is less than the number of hit points P.

As described above, in the plate clearance correction method, the plane portion detection step S130 for detecting the plane portion 80 including the hit point P from the shell element model 40 is performed.
Further, the plane detection unit 12 functions as a plane part detection unit that detects the plane part 80 including the hit point P from the shell element model 40.

  After detecting the flat surface portion 80, the plate gap correcting device 10 groups the flat surface portion 80 including the detected hit point P by the grouping portion 13 as shown in FIGS. 4 and 8 (S140).

  In the following, as shown in FIG. 9, the plane portions 81 to 86 including the seven hit points P are detected in step S <b> 130, and four 1D elements 101 to 104 are generated on the plane portions 81 to 86. An explanation will be given.

  First, as shown in FIGS. 8 and 9, the grouping unit 13 searches the plane units 81 to 86 based on the connection of the 1D elements 101 to 104 (S142).

That is, the grouping unit 13 acquires information on the plane units 81 to 86 connected by the 1D elements 101 to 104 based on the node information corresponding to the 1D elements 101 to 104.
For example, in the case of the 1D element 101 that connects the plane part 81 and the plane part 82, the grouping unit 13 acquires information that associates the 1D element 101 with the plane parts 81 and 82. The grouping unit 13 acquires information regarding the association of the 1D elements 101 to 104 and the plane units 81 to 86 with respect to all the 1D elements 101 to 104.

As a result, the grouping unit 13 performs the 1D elements 101 to 104 such as “101 = 81, 82”, “102 = 82, 83”, “103 = 83, 84”, and “104 = 85, 86”. And the information which linked | related the plane parts 81-86 is acquired.
Since the 1D elements 101 to 104 connect two plane parts in the plane parts 81 to 86, one 1D element 101 to 104 includes two plane parts in the plane parts 81 to 86. Are associated.

Next, the grouping unit 13 searches for the connection between the plane parts 81 to 86 by tracing information obtained by associating the acquired 1D elements 101 to 104 with the plane parts 81 to 86 (S144).
At this time, the grouping unit 13 searches for information including the plane parts 81 to 86 in the information in which the acquired 1D elements 101 to 104 and the plane parts 81 to 86 are associated with each other.

For example, when searching for information including the plane portion 82, the grouping unit 13 associates the 1D element 101 with the plane portions 81 and 82, and associates the 1D element 102 with the plane portions 82 and 83. Information (“101 = 81, 82” and “102 = 82, 83”) is detected.
In this case, the grouping unit 13 determines that the plane unit 82 is connected to the plane units 81 and 83, and acquires the plane units 81 and 83 as information related to the connection of the plane unit 82.
The grouping unit 13 obtains information related to the connection of the plane parts 81 to 86 with respect to all the plane parts 81 to 86.

As a result, the grouping unit 13 sets “81 = 82”, “82 = 81,83”, “83 = 82,84”, “84 = 83”, “85 = 86”, and “86 = 85”. In detail, the information regarding the connection of the plane portions 81 to 86 is acquired.
Thereby, the grouping unit 13 can determine which plane part the plane parts 81 to 86 are connected to.

  After searching for the connection of the plane parts 81 to 86, the grouping unit 13 groups the plane parts 81 to 86 for each related plane part based on the information related to the connection of the plane parts 81 to 86 (S146). ).

In the present embodiment, the “related plane portion” refers to the plane portions 81 to 86 to which the 1D elements 101 to 104 are connected.
Specifically, the flat portions 81 and 82 connected by the 1D element 101 and the flat portions 81 and 83 connected by the 1D elements 101 and 102 are used.

The grouping unit 13 indicates that the plane part 81 is connected to the plane part 82, the plane part 82 is connected to the plane parts 81 and 83, and the plane part 83 is connected to the plane parts 82 and 84. Judgment is based on information related to connections.
In this case, the grouping unit 13 determines that the plane parts 81 to 84 are related plane parts.

The grouping unit 13 determines the relevance of the plane parts 81 to 86 based on the information related to the connection of the plane parts 81 to 86, and groups the related plane parts 81 to 84 as one group.
The grouping unit 13 repeatedly performs grouping of related plane parts, and divides all the plane parts 81 to 86 into one or more groups.

  Accordingly, as shown in FIGS. 8 and 10, the grouping unit 13 has the plane portions 81 to 86 such as “Group A: 81, 82, 83, 84” and “Group B: 85, 86”. Are grouped by related planes.

Here, for example, when the plane portion 82 is moved to correct the plate gaps of the plane portions 82 and 83, the plate gaps of the plane portions 81 and 82 change (see arrow M11 shown in FIG. 10). Moreover, when the plane part 83 is moved and the gap of the plane parts 82 and 83 is corrected, the gap of the plane parts 83 and 84 is changed.
On the other hand, when the plane portion 85 or the plane portion 86 is moved to correct the plate gaps of the plane portions 85 and 86, other plate gaps do not change (see M31 shown in FIG. 10).

That is, when one gap of the plane portions 81 to 84 belonging to the group A is corrected, the other gaps of the plane portions 81 to 84 belonging to the same group A may vary. On the other hand, the plate gaps of the plane portions 85 and 86 belonging to the other group B do not vary.
That is, the plate gap correction device 10 groups the plane portions 81 to 84 and the plane portions 85 and 86 that may be redone in the plate gap correction operation into different groups A and B by the grouping unit 13. is there.

Thus, in the clearance correction method, based on the detected plane portions 81 to 86 and 1D elements 101 to 104, the plane portions 81 to 84 and the plane portions 85 and 86 in which the 1D elements 101 to 104 are interposed are combined into one. A grouping step S140 for grouping as groups A and B is performed.
Further, the grouping unit 13 combines the plane parts 81 to 84 and the plane parts 85 and 86 with the 1D elements 101 to 104 into one group A based on the detected plane parts 81 to 86 and the 1D elements 101 to 104. It functions as a grouping means for grouping as B.

  Note that the 1D element 100 may be generated until the grouping step S140 is performed (or at the beginning of the grouping step S140), and is not necessarily performed first.

After grouping the plane portions 81 to 86, the sheet gap correction device 10 generates sheet gap correction amount information by the check unit 11 as shown in FIG. 4 (S150).
At this time, the check unit 11 calculates the correction amount of all the gaps using the difference between the current gap and the specified dimension as the correction amount.

  After generating the correction amount information, the clearance correction device 10 determines the order of movement of the plane portions 81 to 86 in the clearance correction operation by the order determination unit 14 as shown in FIGS. 4 and 11 (S160). .

In the clearance correction operation, as described above, the correction of the clearances of the flat portions 81 to 84 belonging to the group A does not affect the clearances of the flat portions 85 and 86 belonging to the group B. For this reason, the order determination part 14 determines a movement order for every group A * B.
Below, the determination of the movement order of the plane parts 81-84 which belong to the group A is demonstrated.

First, the order determination unit 14 sets the plane part 83 having the largest area among the plane parts 81 to 84 belonging to the group A as a reference plane part.
The reference plane portion 83 is a plane portion serving as a reference for the other plane portions 81, 82, and 84 belonging to the group A, that is, a fixed plane portion, in the clearance correction work.
Therefore, the clearance including the flat portion 83, that is, the clearance of the flat portions 82 and 83 and the clearance of the flat portions 83 and 84 are corrected by moving the flat portions 82 and 84.

  After setting the reference plane part 83, the order determination unit 14 determines the movement order based on the reference plane part 83. That is, the order determination unit 14 determines the movement order so that the plane parts 82 and 84 directly connected to the reference plane part 83 are moved first by the 1D elements 102 and 103.

  Temporarily, when the plane part 82 is moved and the gap of the plane parts 82 and 83 is corrected, the gap of the plane parts 83 and 84 does not change (see arrow M11 shown in FIG. 11). Moreover, when the plane part 84 is moved and the gap of the plane parts 83 and 84 is corrected, the gap of the plane parts 82 and 83 does not change (see arrow M21 shown in FIG. 11).

That is, by setting the reference plane portion 83, among the plane portions 81 to 84 belonging to the group A, there is no influence on the plate gap correction work like the plate gap of the plane portions 82 to 84 (that is, one of the plane portions 81 to 84). The other gap is not changed by correcting the gap).
That is, the clearance of the flat portions 82 to 84 does not affect the clearance correction operation, regardless of which of the flat portion 82 and the flat portion 84 is moved first.

  For this reason, the order determination unit 14 branches the movement order into a first movement order that moves sequentially from the plane part 82 and a second movement order that moves sequentially from the plane part 84 (see FIG. 11B). ). In this case, the plane part 82 or the plane part 84 is the plane part that moves first.

Next, the order determination unit 14 determines the movement order so that the plane portion directly connected to the plane portions 82 and 84 is moved next to the plane portions 82 and 84.
That is, in FIG. 11, the movement order (first movement order) is determined so that the planar part 81 directly connected to the planar part 82 by the 1D element 101 is moved next to the planar part 82.

If the plane portion 82 is further connected to a plane portion different from the plane portion 81, the order determination unit 14 further branches the first movement order as the plane portions 82 and 84 described above.
That is, the order determination unit 14 branches the order of movement when a plurality of plane portions are directly connected to one plane portion.

  The order determination unit 14 recursively determines such a movement order and branches, and determines the movement order of the plane parts 81 to 84 belonging to the group A.

Thus, in the clearance correction method, among the plane portions 81 to 84 belonging to the group A, one plane portion 83 is set as the reference plane portion, and the plane belonging to the group A with the reference plane portion 83 as a reference. The order determination process S160 which determines the order which moves the parts 81-84 for every group A * B is performed.
The order determination unit 14 sets one plane portion 83 as the reference plane portion among the plane portions 81 to 84 belonging to the group A, and uses the reference plane portion 83 as a reference to the plane portion 81 belonging to the group A. -84 functions as an order determining means for determining the order of movement for each of the groups A and B.

After determining the movement order, the plate gap correction device 10 moves the plane parts 81 to 86 in the order of the movement order determined by the movement part 15 (S170).
Below, the movement of the plane parts 81-84 which belong to the group A is demonstrated.

The moving part 15 moves the flat part 82 to correct the gaps of the flat parts 82 and 83, and then moves the flat part 81 to correct the gaps of the flat parts 81 and 82 (FIG. 11A). (See arrows M11 and M12).
Further, before the plane part 82 is moved or after the plane part 81 is moved, the plane part 84 is moved to correct the clearance of the plane parts 83 and 84 (see arrow M21 shown in FIG. 11A).

  That is, in the movement order shown in FIG. 11B, the arrows connecting the plane portions 81 to 84 correspond to the 1D elements 101 to 104 (plate gaps), and the moving unit 15 moves the plane portion located on the right side. Let me fix the gap.

According to this, the clearance correction method and the clearance correction device 10 can complete the clearance correction work only by correcting the clearance in the order of movement. For this reason, the clearance correction method and the clearance correction apparatus 10 can complete the clearance correction work without considering the relationship between the flat portions 81 to 86.
In other words, the clearance correction method and the clearance correction device 10 determine the movement order, thereby correcting the clearance of the component 30 in which the large flat surface portion 80 is formed or the component 30 having many striking points P in the clearance correction operation. Even when it is done, it is possible to prevent redo due to oversight or the like. Therefore, the clearance correction method and the clearance correction device 10 can perform the clearance correction operation in a short time.

  The movement of the plane portions 81 to 84 is not necessarily performed by the plate gap correction device 10. For example, correction amount information may be fed back to the design unit 20 to correct the gap with the CAD data of the component 30 (see arrow T shown in FIG. 1).

  In step S <b> 170, the moving unit 15 moves the plane portions 81 to 84 so that the plate gap becomes the specified size based on the plate gap and the specified size.

That is, the correction amount information is not acquired in step S170 but is acquired in order to correct the plate gap by means other than the moving unit 15 (design unit 20 or manual work). Therefore, it is not always necessary to acquire the correction amount information.
However, when the plate clearance correction operation fails (for example, when an infinite loop occurs when determining the movement order for some reason), the plane portions 81 to 84 are moved by means other than the moving unit 15. The correction amount information is a guideline for correction. For this reason, it is preferable that the board clearance correction apparatus 10 acquires correction amount information.
Further, the timing of acquiring the correction amount information is not limited to the present embodiment, and may be performed at an appropriate timing.

Thus, in the clearance correction method, the correction amount information acquisition step S150 for calculating the correction amount of the clearance is performed.
The check unit 11 functions as a correction amount information acquisition unit that calculates the correction amount of the gap.

In addition, you may perform correction | amendment of a clearance gap (movement of the plane parts 81-84) based on correction amount information. However, in this case, it is necessary to appropriately recalculate the correction amount information in consideration that the influence of the gap to be corrected first affects the gap to be corrected later.
For this reason, it is preferable to correct the gap based on the gap and the specified dimension.

Here, as shown in FIG. 12, the shell element model 40 may have a fillet portion 90 that connects the two plane portions 80 detected by the plane detector 12.
As shown in FIG. 18, in step S <b> 170, when one flat surface portion 80 with the fillet portion 90 interposed is simply moved, a step D is formed between the fillet portion 90 and the one flat surface portion 80. .

Therefore, as shown in FIGS. 12 and 13, the moving unit 15 moves the plane unit 80, and moves a plurality of shell elements 50 (see the transition unit S illustrated in FIG. 13) adjacent to the plane unit 80 to fillet units. It is deformed so as to be adapted to 90 (see arrow M shown in FIGS. 12 and 13).
Thereby, the moving part 15 can absorb the level difference D. Therefore, the moving unit 15 can prevent the step D from being formed when the plane unit 80 is moved (see FIG. 18).

As described above, in the gap clearance correction method, the plane portion 80 is moved based on the determined moving order, and a correction step for correcting the gap is performed.
Further, the moving unit 15 functions as a correcting unit that moves the plane unit 80 based on the determined moving order and corrects the gap.

  According to this, the clearance correction method can automatically correct the clearance. That is, the plate clearance correction operation can be performed in a shorter time.

  In the order determination step S <b> 170 by the order determination unit 14, the plane part 83 having the largest area among the plane parts 81 to 84 belonging to the group A is set as the reference plane part 83.

  According to this, since the plate gap correction method fixes the flat portion 83 having a large deformation amount, when the flat portion 80 is moved, the deformation amount of the shell element model 40 can be reduced (see FIG. 13). .

If there is a part 30 or the like that cannot be moved due to design restrictions or the like, the grouping unit 13 sets the plane part 80 detected by the shell element model 40 of the part 30 that cannot be moved as a reference plane part. It doesn't matter.
Further, the grouping unit 13 may consider the correction amount information when setting the reference plane part.

  After moving the plane portion 80, the gap clearance correction device 10 checks the gap again by the check section 11 as shown in FIG. 4 (S120).

Thus, by checking the gap again after the movement of the plane portion 80, the gap correction device 10 can correct the gap on the basis of a predetermined standard. In other words, even if the first gap check is NG and the gap correction work is performed, the gap correction device 10 performs the gap correction work with the same judgment criteria as when the first gap check is OK. Can be completed.
Further, the plate gap correcting device 10 can correct the plate gap again when the plate gap is not corrected correctly.

  Note that the timing for checking the gap is not limited to the present embodiment, and for example, it may be after detecting the plane part 80 or after grouping the plane parts 80.

Next, a first variation of the plate gap correction method will be described.
In the sheet gap correction method of the first modified example, the point that the design section 20 performs the sheet gap correction work is different from the sheet gap correction method of the present embodiment (see FIG. 1). That is, in the clearance correction method of the first modification, the clearance correction operation is performed by the design unit 20 based on the CAD data of the component 30 and the position information of the hit point P.
In this case, the design unit 20 includes various functions related to the plate gap correction method (for example, a function for performing the same operation as the check unit 11 on the CAD data of the component 30).

As shown in FIG. 17, the design unit 20 generates a mesh 140 that divides the CAD data of the part 30 during the clearance correction work, and arranges one vertex of the mesh 140 at a position corresponding to the hit point P. doing.
That is, the design unit 20 generates a mesh 140 corresponding to the shell element model 40 as in the present embodiment from the CAD data of the component 30.

  First, the design unit 20 checks the sheet gap as in step S120 of the present embodiment (S210). At this time, the design unit 20 measures, for example, the distance between the smooth portions where the hit points P are located, and determines whether the plate gap has a specified dimension.

If one or more gaps are not in the correct state as a result of the gap check, steps S220 to S260 for performing processing corresponding to steps S130 to S170 of the present embodiment on the CAD data of the component 30 are performed (S220: No).
Hereinafter, differences from the plate gap correction method of the present embodiment will be described in steps S220 to S260.

  As shown in FIG. 15, the CAD data of the component 30 forms the ends of two adjacent smooth portions at pin angles. For this reason, the design unit 20 detects a smooth portion corresponding to the position information of the hit point P as the plane portion 80 including the hit point P (S220).

In the grouping of the plane portions 80 (step S230), the vertex of the mesh 140 where the hit point P is located is connected, and a one-dimensional element corresponding to the 1D element 100 is generated by CAD of the part 30. Then, the detected smooth portions are grouped in the same procedure as in this embodiment (see FIGS. 8 and 10).
Thereafter, the movement order is determined by the same procedure as in the case of the plate gap correction method of the present embodiment (S240, S250).

  After determining the movement order, as shown in FIG. 16, the design unit 20 moves the detected smooth portion along the movement order (S260, see arrows shown in black in FIG. 16).

  Thus, according to the clearance correction method of the first modified example, clearance clearance correction work can be performed with the CAD data of the component 30. Therefore, the design unit 20 can efficiently perform the design work in consideration of the plate gap.

  Here, when the topology changes due to the correction of the gap (for example, when a step is formed in the component 30), a correct result may not be obtained by the analysis by CAE. In such a case, it is necessary for the design unit 20 to correct the CAD data of the component 30.

  According to the clearance correction method of the first modified example, the clearance clearance correction method can be performed using the CAD data of the component 30, and therefore it is possible to easily cope with a change in topology generated by the clearance clearance correction operation.

Next, a second modification of the plate gap correction method will be described.
In the clearance correction method according to the second modification, the clearance correction work is performed by the clearance correction device 10 and the design unit 20, which is different from the clearance correction operation of the present embodiment (see FIG. 1).

  The design unit 20 generates a mesh 140 in the CAD data of the component 30 in the same manner as in the case of the first modification in the clearance correction work (see FIG. 15).

As shown in FIG. 17, the design unit 20 performs a clearance check similarly to the case of the first modification (S310).
If one or more gaps are not in the correct state due to the gap check, the design unit 20 converts the CAD data of the part 30 using the finite element method to generate a shell element model 40.
Then, the design unit 20 transmits the shell element model 40 and the position information of the hit point P to the plate gap correction device 10 (S310: No, S320).

Based on the shell element model 40 transmitted from the design unit 20, the plate clearance correction device 10 moves from the detection of the plane unit 80 including the hit point P, similarly to steps S 130 to S 160 of the plate clearance correction method of the present embodiment. The order is determined (S330 to S360).
In addition, the plate gap correction device 10 generates the 1D element 100 at an appropriate timing (for example, before step S330 or before step S340).

  Then, the clearance correction apparatus 10 feeds back the correction position information (position information corresponding to the detected flat surface portion 80), the clearance correction amount information, and the movement order to the design unit 20. That is, the design unit 20 acquires correction position information, plate gap correction amount information, and movement order (S370).

  The design unit 20 moves the plane unit 80 based on the information fed back from the plate gap correction device 10 as in the first modification (S380, see FIG. 16). In the clearance correction method of the second modification, the clearance clearance correction operation is performed in this way.

Here, the clearance correction method is mainly intended to correct the clearance that affects the analysis result by CAE.
For this reason, it is assumed that the function of determining the grouping and the moving order determination is implemented in a device that performs analysis by CAE. That is, it is assumed that the plate gap correction method is performed by an apparatus different from the design unit 20.

  Therefore, the configuration (feedback position information, plate gap correction amount information, and movement order) related to the plate gap correction work is fed back from the plate gap correction device 10 to the design unit 20 as in the plate gap correction method of the second modification. By doing so, the sheet gap correction method can be implemented in the design unit 20 with a small development amount.

DESCRIPTION OF SYMBOLS 10 Plate gap correction apparatus 12 Plane detection part (plane part detection means)
13 Grouping department (grouping means)
14 Order determining unit (order determining means)
30 parts 31 welded portion 40 shell element model 50 shell element 80 to 86 plane portion 83 reference plane portion 100 to 104 1D element A / B group P dot

Claims (8)

By Itasuki correction device, as well as modeling the plurality of parts to be welded at a predetermined welding point in a shell element is modeled by 1D elements welds, corrects the plate gap is the length dimension of the 1D element Itasuki A correction method,
A plane portion detecting step of detecting a plane portion including the hit point from the shell element model by the plane portion detecting means of the plate gap correcting device ;
A grouping step of grouping, as a group, the plane portions interposing the 1D element based on the detected plane portion and the 1D element by the grouping means of the plate gap correction device ;
Among the plane portions belonging to the group, by setting the order determining means of the gap correction device , one plane portion is set as a reference plane portion, and the plane portion belonging to the group is determined based on the reference plane portion. An order determination step of determining the order of movement for each of the groups;
How to correct the gap. In the order determination step,
The order determining means sets, as the reference plane part, the plane part having the largest area among the plane parts belonging to the group.
The plate gap correction method according to claim 1. A correction step of correcting the gap by moving the plane portion based on the determined movement order by the correction means of the gap correction device ;
Do further,
The plate gap correction method according to claim 1 or 2. Correction amount information acquisition step of calculating the correction amount of the gap by the correction amount information acquisition means of the gap correction device ,
Do further,
The plate gap correction method according to any one of claims 1 to 3. A device for correcting a gap that models a plurality of parts to be welded at a predetermined hit point with a shell element, models a weld with a 1D element, and corrects a gap that is the length of the 1D element,
A plane portion detecting means for detecting a plane portion including the hit point from the shell element model;
Grouping means for grouping the plane portions interposing the 1D elements as one group based on the detected plane portions and the 1D elements;
Among the plane portions belonging to the group, one plane portion is set as a reference plane portion, and the order of moving the plane portions belonging to the group is determined for each group with reference to the reference plane portion. Order determination means;
Comprising
Plate gap correction device. The order determining means includes
A plane portion having the largest area among the plane portions belonging to the group is set as the reference plane portion.
The plate gap correction device according to claim 5. Correction means for moving the plane portion based on the determined movement order and correcting the gap.
The comprises the further,
The plate gap correction device according to claim 5 or 6. Correction amount information acquisition means for calculating the correction amount of the plate gap,
Further comprising
The plate gap correction device according to any one of claims 5 to 7.

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