JP2011095065A - Position calculation method of assembly, and position calculation system of assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position calculation method of an assembly, and a position calculation system of the assembly for simply and rapidly measuring the assembly accuracy of components by quantitatively obtaining an actual position of the assembly, even when the assembly is concealed in the inside in an assembled component state and a completed product state, or the assembly is blocked by a body and the other components. <P>SOLUTION: The position calculation method of the assembly includes: a first measurement process for measuring a contour shape before the components are coupled; a second measurement process for measuring a contour shape of a coupling section in an assembly structure; an alignment process for implementing an alignment so as to overlap contour lines of first contour data 51, second contour data 52 and coupling section contour data 53; and a position calculation process for implementing alignment so as to overlap with the contour lines of design data 61 and assembly structure contour data 54. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  More specifically, the present invention relates to a position calculation method and a position calculation system for an assembly part, and more particularly, to the position of the assembly part in an assembly structure in which two parts are connected by an assembly part. It is related with the technique of calculating.

  2. Description of the Related Art Conventionally, a technique for assembling automobile parts such as undercarriage parts and interior / exterior parts to an automobile main body (body) using an assembly part provided in the parts. At that time, if there is an assembly abnormality of the parts with respect to the automobile body, it is necessary to correct early, so by quantitatively grasping the actual position of the assembly part, It is important to measure the assembly accuracy of parts.

As described above, a technique using non-contact measuring means is used as a technique for measuring the assembling accuracy of assembling parts (see, for example, Patent Document 1).
Further, as a technique for measuring the appearance shape in a non-contact manner, a technique for superimposing the shape data measured by the measuring means and the shape data obtained in advance is used (see, for example, Patent Document 2).

  However, when assembling the parts using the assembling part, the assembling part is hidden inside or obstructed by the body or other parts in the assembled state or the state of the finished vehicle. Sometimes. Thereby, it may be difficult to measure the assembly part depending on the measurement means in the prior art. For this reason, the assembling accuracy is predicted from the change in the external shape due to the periphery of the assembling portion or shim adjustment, but this method takes time and the prediction accuracy is low.

JP 2002-2566 A JP 2003-279333 A

  Therefore, in view of the above-described current problems, the present invention is not limited to the above, even when the assembly part is hidden in the assembled state or the state of the finished vehicle, or when it is blocked by the body or other parts. By ascertaining the actual position of the assembling part quantitatively, the assembling part position calculating method and the assembling part position calculating system can measure the assembling accuracy of the parts easily and quickly. Is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, the assembly includes an assembly part, and a first part having a known design data indicating a position and shape of the assembly part and a second part having an assembly part are included in the assembly. In the assembling structure in which the attaching part is connected by being inserted into the attached part, the position calculating method of the attaching part, wherein the outer shape of the first part and the second part before connection is determined. The first part in the assembly structure in a state in which the first measurement step and the first part and the second part are connected to each other and generate the first outline data and the second outline data. And measuring the outer shape of the connecting portion between the second part and generating the connecting portion outer shape data, and the first outer shape data and the second outer shape generated in the second measuring step and the first measuring step. Between the data and the connecting portion outline data generated in the second measurement step. By performing alignment so that the respective outlines overlap each other, the assembly process outline data is generated, and the alignment process, the known design data, and the assembly structure outline data generated in the alignment process And a position calculation step of generating assembly part position data indicating a position shape of the assembly part with respect to the second part by performing alignment so that the respective outlines overlap each other. .

  In Claim 2, before the said alignment process, the 1st external shape data produced | generated at the said 1st measurement process remove | excluded external shape data other than a connection part with said 2nd components, The correction | amendment 1st external shape data In the alignment step, the modified first contour data generated in the modification step is used in the matching step to generate assembly structure contour data. .

  According to a third aspect of the present invention, the first component is provided with a detection marker, and the first outer shape data generated in the first measurement step includes shape data of the detection marker, and in the second measurement step The generated connecting portion outer shape data includes shape data of the detection marker, and in the matching step, the shape data of the detection marker in the first outer shape data, and the shape data of the detection marker in the connecting portion outer shape data, The assembly structure outline data is generated by performing alignment so that the outline lines overlap.

  According to a fourth aspect of the present invention, the apparatus includes: a measuring unit that measures the outer shape of the measurement target; and a data operation unit that generates and processes outer shape data from the outer shape of the measurement target measured by the measuring unit. A first part for which design data indicating the position and shape of the assembly part is known and a second part having an assembly part are inserted into the assembly part. An assembly position calculation system for calculating the position of the assembly portion in the assembly structure connected by the measuring device, wherein the measurement means before the connection of the first component and the second component. Measure the outer shape, respectively, and measure the outer shape of the connecting part between the first part and the second part in the assembly structure in which the first part and the second part are connected. , By the data operation means, the first component and The first outer shape data and the second outer shape data are generated based on the outer shape before connecting the second component, and the connecting portion is based on the outer shape of the connecting portion between the first component and the second component. Generate outer shape data, and align the first outer shape data, the second outer shape data, and the connecting portion outer shape data so that the respective outer shape lines overlap, thereby generating assembly structure outer shape data. Assembling that shows the position shape of the assembly part with respect to the second part by aligning the design data that is already known and the assembly structure outline data so that the outlines thereof overlap each other. The part position data is generated.

  In Claim 5, the said 1st external shape data which generate | occur | produced the correction 1st external shape data which remove | excluded external shape data other than a connection part with said 2nd component from said 1st external shape data by said data operation means are produced | generated. Instead, the modified first outline data is used to generate assembly structure outline data.

  According to a sixth aspect of the present invention, the first component is provided with a detection marker, the first outer shape data includes shape data of the detection marker, and the connecting portion outer shape data includes shape data of the detection marker. By performing alignment so that the respective contour lines of the shape data of the detection marker in the first contour data and the shape data of the detection marker in the connecting portion contour data are overlapped by the data operation means. The assembly structure outline data is generated.

  As effects of the present invention, the following effects can be obtained.

  According to the present invention, the actual position of the assembly part is determined even when the assembly part is hidden inside or blocked by the body or other parts in the state where the part is assembled or in the state of the finished vehicle. It is possible to easily and quickly measure the assembly accuracy of the parts by grasping it.

The figure which showed the position calculation system of the assembly | attachment part which concerns on one Embodiment of this invention. The figure which showed the assembly structure which is the object which similarly calculates the position of an assembly part in the position calculation system of an assembly part. The figure which showed the flowchart of the position calculation method of the assembly | attachment part which concerns on 1st embodiment. The figure which showed the 1st measurement process of measuring the external shape of 1st components provided with an assembly | attachment part. The figure which showed the 1st measurement process of measuring the external shape of 2nd components provided with a to-be-assembled part. The figure which showed the 2nd measurement process of measuring the external shape of the assembly structure which connected the 1st component and the 2nd component. The figure which showed the matching process which produces | generates the assembly structure external shape data which concern on 1st embodiment. The figure shown about the position calculation process which produces | generates assembly | attachment part position data. The figure which showed the flowchart of the position calculation method of the assembly | attachment part which concerns on 2nd embodiment. The figure which showed the matching process which produces | generates the assembly structure external shape data which concern on 2nd embodiment. (A) is the figure which showed the 1st measurement process which concerns on 3rd embodiment, (b) is the figure which showed the 2nd measurement process similarly. The figure which showed the matching process which produces | generates the assembly structure external shape data which concern on 3rd embodiment.

Next, embodiments of the invention will be described.
It should be noted that the technical scope of the present invention is not limited to the following examples, but broadly covers the entire scope of the technical idea that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings. It extends.

[Assembly Position Calculation System 10]
First, the position calculation system 10 for an assembly unit according to an embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, the position calculation system 10 for an assembly according to the present embodiment is measured by a laser measuring instrument 11 that is a measuring means for measuring the outer shape of a measurement target, and the laser measuring instrument 11. A data processing terminal 19 is provided as data operation means for generating and processing outer shape data from the outer shape to be measured.

The laser type measuring machine 11 mainly includes a base 12, a support 13, a first support part 14 a, a second support part 14 b, and a laser type sensor 15. The laser sensor 15 is moved to a predetermined direction and position by driving each member at the respective connecting portion, and at the same time, a measurement laser is irradiated along the measurement object from the irradiation unit disposed at the tip of the laser sensor 15. Is irradiated. And the reflected light in the measuring object of the measuring laser is received by the light receiving part similarly disposed in the laser type sensor 15 so that the outer shape of the measuring object can be measured.
In the present embodiment, the non-contact type laser measuring machine 11 is used as the measuring unit, but a contact type measuring unit such as a probe type may be used.

  The data processing terminal 19 is a so-called electronic computer including a storage unit, a calculation unit, an input unit, an output unit, and the like, and is electrically connected to the laser type measuring machine 11. Then, the data processing terminal 19 instructs the laser type measuring machine 11 to control the posture and operation of the laser type sensor 15, and the measurement object measured by the laser type sensor 15 input from the laser type measuring machine 11. The external shape data is generated and processed from the external shape.

Next, an assembly structure that is a calculation target of the position of the assembly unit in the assembly unit position calculation system 10 according to the present embodiment will be described with reference to FIG.
As shown in FIG. 2, the assembly structure according to the present embodiment connects one end of a suspension arm 30 that is a first part and the lower end of a steering knuckle 25 that is a second part in an automobile suspension. Configured.

  The suspension arm 30 is a member formed by combining an arm 31 and a stud 33. The arm 31 includes an arm portion 31a that is a columnar portion and a socket portion 31b that is formed in a spherical cavity at one end of the arm portion 31a. The stud 33 includes a spherical portion 33a that is rotatably accommodated within a predetermined range with respect to the socket portion 31b, and a bolt portion 33b that extends from the spherical portion 33a. That is, the suspension arm 30 is configured so that the bolt portion 33b of the stud 33 can be rotated with respect to the arm 31 by accommodating the spherical portion 33a in a socket portion 31b formed at one end of the arm 31 in a rotatable manner. The so-called ball joint is provided.

  The steering knuckle 25 is a member for connecting the body 21 and the tire 23 of the automobile. Specifically, as shown in FIG. 2, the upper end portion of the steering knuckle 25 is fixed to the body 21, and the tire 23 is rotatably connected to the middle portion of the steering knuckle 25. And the to-be-assembled part 25a with which the hole which can insert the said volt | bolt part 33b was opened is formed in the lower end part of the steering knuckle 25. As shown in FIG.

  In the above configuration, when the suspension arm 30 and the steering knuckle 25 are coupled, the bolt part 33b is inserted into the hole of the assembled part 25a, and the nut 41 is screwed into the bolt part 33b and tightened. That is, the stud 33 in the suspension arm 30 is disposed as an assembly portion in the assembly structure constituted by the suspension arm 30 and the steering knuckle 25. In the assembly structure according to the present embodiment, the suspension arm 30 including the stud 33 that is the assembly portion, the steering knuckle 25 including the assembly portion 25a, and the bolt portion 33b of the stud 33 are the assembly portion. It is configured by being inserted into 25 a and fastened with a nut 41.

  In the present embodiment, the case where the suspension arm 30 and the steering knuckle 25 are coupled as described above as an assembly structure that is a calculation target of the position of the assembly portion will be described. However, the present invention is applied thereto. The assembling structure may have other configurations. For example, the present invention can also be applied to an assembly structure for other suspension parts in the vicinity of the suspension, an assembly structure of the parts in the vicinity of the instrument panel and the body 21, or the like.

  And the position calculation system 10 of the assembly part which concerns on this embodiment calculates the position of the stud 33 which is an assembly part so that it may mention later in the assembly structure comprised as mentioned above. Specifically, the coordinates of the center C of the spherical portion 33a shown in FIG. 2 with respect to the body 21, the tire 23, or the steering knuckle 25 are calculated. That is, since the steering knuckle 25 is fixed in relative positional relationship with the body 21 and the tire 23, if the coordinates of the center C of the spherical portion 33a with respect to the steering knuckle 25 can be calculated, the body 21 and the tire 23 of the spherical portion 33a are calculated. The positional relationship with respect to can also be calculated. In addition, as the coordinates of the center C of the spherical portion 33a, the coordinates for the reference hole opened in the body 21 are mainly used for the body 21, and the coordinates for the rotation axis of the tire 23 are used for the tire 23. .

  Moreover, in the position calculation system 10 of the assembly part according to the present embodiment, the suspension arm 30 has the known design data 61 indicating the position and shape of the spherical part 33a in the stud 33 which is the assembly part. Is used (see FIG. 8). That is, in the design stage of the suspension arm 30, CAD (Computer Aided Design) data includes detailed design data 61 regarding the shape of the arm 31 and the stud 33 that is an internal component, specifically, the coordinates of the center C of the spherical portion 33a. What is obtained as is used.

[Assembly position calculation method]
Next, an outline of a method for calculating the position of the stud 33 which is the assembly part in the assembly part position calculation system 10 configured as described above will be described with reference to FIG.
As shown in FIG. 3, in the method of calculating the position of the assembly portion according to the present embodiment, first, the suspension arm 30 as the first component and the steering knuckle 25 as the second component are measured by the laser measuring instrument 11. The external shape of the suspension arm 30 and the steering knuckle 25 before connection is measured by the laser measuring machine 11, and the first external data 51 that is the external data of the suspension arm 30 and the external data of the steering knuckle 25 are measured. A first measurement step (step S01) for generating certain second outline data 52 is provided.

  Thereafter, the assembly structure in a state in which the suspension arm 30 and the steering knuckle 25 are coupled is set as a measurement target of the laser measuring instrument 11, and the outer shape of the coupling portion between the suspension arm 30 and the steering knuckle 25 in the assembly structure is as follows. A second measurement step (step S02) is performed in which the measurement is performed by the laser type measuring machine 11 and the connection part outline data 53 which is the outline data of the connection part is generated.

  After that, the outer shape lines of the first outer shape data 51 and the second outer shape data 52 generated in the first measuring step and the connecting portion outer shape data 53 generated in the second measuring step overlap each other. Is provided with a matching step (step S03) for generating assembly structure outer shape data 54 by performing alignment.

  Then, the steering of the stud 33 is performed by aligning the design data 61 obtained in advance as described above and the assembly structure outline data 54 generated in the alignment process so that the outlines overlap each other. A position calculating step (step S04) for generating assembly part position data 71 indicating a position shape with respect to the knuckle 25 is provided.

Each step in the method of calculating the position of the assembly part configured as described above will be described in order with reference to FIGS.
First, in the first measurement step (step S01), as shown in FIG. 4, the outer shape of the suspension arm 30 before connection is measured. Specifically, the laser-type sensor 15 in the laser-type measuring machine 11 measures the outer shape of the suspension arm 30 by making one turn around the suspension arm 30 as shown by an arrow A in FIG. .
Then, the outer shape of the suspension arm 30 measured by the laser sensor 15 is input from the laser measuring instrument 11 to the data processing terminal 19. Further, by processing the outer shape of the suspension arm 30 in the data processing terminal 19, first outer shape data 51, which is the outer shape data of the suspension arm 30, is generated.

In the first measurement step (step S01), the outer shape of the steering knuckle 25 before connection is also measured as shown in FIG. Specifically, like the suspension arm 30, the laser type sensor 15 in the laser type measuring machine 11 makes one round around the steering knuckle 25 as shown by an arrow B in FIG. The shape is measured.
Then, the outer shape of the steering knuckle 25 measured by the laser type sensor 15 is input from the laser type measuring machine 11 to the data processing terminal 19. Further, by processing the outer shape of the steering knuckle 25 in the data processing terminal 19, second outer shape data 52 that is outer shape data of the steering knuckle 25 is generated.

Next, in the second measurement step (step S02), as shown in FIG. 6, the outer shape of the connecting portion between the suspension arm 30 and the steering knuckle 25 is measured. Specifically, the laser type sensor 15 in the laser type measuring machine 11 changes the outer shape of the connecting portion along the connecting portion between the suspension arm 30 and the steering knuckle 25 as shown by an arrow C in FIG. Measure.
Then, the external shape of the connecting portion between the suspension arm 30 and the steering knuckle 25 measured by the laser sensor 15 is input from the laser measuring instrument 11 to the data processing terminal 19. Further, by processing the outer shape in the data processing terminal 19, the connecting portion outer shape data 53 which is the outer shape data of the connecting portion is generated.

  Next, in the matching step (step S03), as shown in FIG. 7, the data processing terminal 19 generates the first outer shape data 51 and the second outer shape data 52 generated in the first measurement step (step S01). Positioning is performed so that the respective outlines overlap with the connecting part outline data 53 generated in the second measurement step (step S02). As a result, the assembly structure external data 54 in the assembly structure in which the suspension arm 30 and the steering knuckle 25 are coupled is generated.

  Next, in the position calculation step (step S04), as shown in FIG. 8, in the data processing terminal 19, the design data 61 known as described above and the assembly structure outline data 54 generated in the matching step (step S03) are displayed. The alignment is performed so that the respective outlines overlap. Thereby, the assembly portion position data 71 indicating the position shape of the stud 33 with respect to the steering knuckle 25 is generated. Specifically, the coordinates of the center C of the spherical portion 33a with respect to the steering knuckle 25 are calculated by combining the design data 61 relating to the coordinates of the center C of the spherical portion 33a and the assembled structure outer shape data 54. Further, as described above, after calculating the coordinates of the center C of the spherical portion 33a with respect to the steering knuckle 25, the positional relationship with the body 21 and the tire 23 can also be calculated.

As described above, in the assembly portion position calculation system 10 according to the present embodiment, the outer shape of the suspension arm 30 and the steering knuckle 25 before connection is measured by the laser sensor 15 in the laser measuring instrument 11. Similarly, the external shape of the connecting portion between the suspension arm 30 and the steering knuckle 25 in the assembly structure in which the suspension arm 30 and the steering knuckle 25 are connected is measured by the laser sensor 15.
Then, the data processing terminal 19 generates the first outer shape data 51 and the second outer shape data 52 based on the outer shape before the suspension arm 30 and the steering knuckle 25 are connected. Similarly, the data processing terminal 19 generates the connecting portion outer shape data 53 based on the outer shape of the connecting portion between the suspension arm 30 and the steering knuckle 25.

  Further, in the data processing terminal 19, the first outer shape data 51, the second outer shape data 52, and the connecting portion outer shape data 53 are aligned so that the respective outer shape lines overlap each other, thereby assembling the structure. The outline data 54 is generated.

  Further, in the data processing terminal 19, the position of the stud 33 with respect to the steering knuckle 25 is aligned by aligning the design data 61 and the assembly structure outer shape data 54 so that the outer contour lines overlap each other. The assembling part position data 71 is generated.

In the assembly part position calculation method and the assembly part position calculation system 10 according to the present embodiment, the spherical part 33a of the stud 33 which is the assembly part covers the socket part 31b by being configured as described above. Even if it is broken, the coordinates of the center C of the spherical portion 33a with respect to the steering knuckle 25 can be calculated.
Specifically, by performing alignment using the design data 61 in which the position and shape of the spherical portion 33a are obtained in advance and the assembly structure outer shape data 54 generated based on the measured outer shape, The assembly portion position data 71 reflecting the position shape of the stud 33 with respect to the steering knuckle 25 can be obtained.

  In other words, according to the position calculation method of the assembly part according to the present embodiment, the assembly part is hidden inside or blocked by the body or other parts in the assembled state or the state of the completed vehicle. Even if it does, it can grasp | ascertain quantitatively the actual position of the said assembly | attachment part. Thereby, it becomes possible to measure the assembly | attachment precision of the said component simply and rapidly.

[Second Embodiment]
Next, a method for calculating the position of the assembly unit according to the second embodiment of the present invention will be described with reference to FIGS. 9 and 10. In addition, in description of the position calculation method of the assembly | attachment part which concerns on the following embodiment, about the part which is common in previous embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 9, in the assembly portion position calculation method according to the present embodiment, the first measurement step (step S11), the second measurement step (step S13), and the alignment step (steps), as in the previous embodiment. S14) and a position calculation step (step S15).

  Furthermore, the method for calculating the position of the assembly part according to the present embodiment is that the suspension arm 130 generated in the first measurement process is performed after the first measurement process (step S11) and before the second measurement process (step S13). A correction step (step S12) is provided in which the corrected first outer shape data 151b is generated by removing the outer shape data 151a other than the connecting portion with the steering knuckle 25 from the first outer shape data 151. Then, in the alignment process (step S14), the modified first outline data 151b generated in the correction process (step S12) is used instead of the first outline data 51 in the embodiment, and the assembly structure outline data is used. Is generated.

Specifically, in the correction process (step S12), as shown in FIG. 10, in the data processing terminal 19, from the first outer shape data 151 generated in the first measurement process (step S11), the part other than the connecting part with the steering knuckle 25 is used. The corrected first outer shape data 151b is generated by removing the outer shape data 151a.
In the second measurement step (step S13), as shown by an arrow D in FIG. 10, the outer shape of the connecting portion between the suspension arm 30 and the steering knuckle 25 is measured by the laser sensor 15, and the connecting portion outer shape data. 153 is generated. At this time, it is assumed that the suspension arm 130 is deformed at the time of assembly. Specifically, as shown in FIG. 10, the arm portion 131 a is deformed in a shape warped upward than before assembly.

  Next, in the matching step (step S14), the data processing terminal 19 uses the second outer shape data 52 generated in the first measurement step (step S11) and the corrected first outer shape generated in the correction step (step S12). Position alignment is performed so that the outlines of the data 151b and the connecting part outline data 153 generated in the second measurement step (step S13) overlap. As a result, assembly structure outline data in the assembly structure in which the suspension arm 130 and the steering knuckle 25 are coupled to each other is generated.

  The correction process (step S12) may be performed before the alignment process (step S14). That is, it is possible to adopt a configuration in which the second measurement process (step S13) is performed before the correction process (step S12).

  As described above, in the position calculation system 10 of the assembly unit according to the present embodiment, the data processing terminal 19 removes the outer shape data 151a other than the connecting portion with the steering knuckle 25 from the first outer shape data 151. The modified first outer shape data 151b is generated, and the modified first outer shape data 151b is used instead of the first outer shape data 151 to generate the assembly structure outer shape data.

In the assembly part position calculation method and the assembly part position calculation system 10 according to the present embodiment, the coordinates of the center C of the spherical part 33a with respect to the steering knuckle 25 are calculated as described above. The calculation accuracy can be improved.
Specifically, as shown in FIG. 10, even when the suspension arm 130 is deformed at the time of assembly, the outer shape data 151a other than the connection portion from the first outer shape data 151 to the steering knuckle 25 in the correction step (step S12). This eliminates the influence of the deformation of the suspension arm 130 when aligning with the connecting portion outer shape data 153 in the alignment step (step S14).
In other words, the outer shape data 151a of the portion of the suspension arm 130 whose shape is deformed is deleted, and the assembly structure outer shape data is generated using only the modified first outer shape data 151b which is the portion of which the shape is not deformed. Thereby, when calculating the coordinates of the center C of the spherical portion 33a with respect to the steering knuckle 25, an assembling error caused by the shape deformation can be reduced.

[Third embodiment]
Next, a method for calculating the position of the assembly unit according to the third embodiment of the present invention will be described with reference to FIGS. 11 and 12.
As shown in FIG. 11, in the assembly portion position calculation method according to the present embodiment, in addition to the configuration of the first embodiment, a detection marker 236 that is a protrusion is disposed on the arm portion 31 a of the suspension arm 230. ing.

As in the first embodiment, in the first measurement step (step S01), the laser sensor 15 makes a round around the suspension arm 230 as indicated by an arrow E in FIG. The external shape of the suspension arm 230 including the marker 236 is measured.
Further, the outer shape of the suspension arm 230 measured by the laser sensor 15 is processed by the data processing terminal 19 to generate first outer shape data 251 that is the outer shape data of the suspension arm 230. At that time, the first outer shape data 251 includes the shape data 251a of the detection marker 236 provided on the suspension arm 230 as shown in FIG.

Further, in the second measurement step (step S02), the laser sensor 15 moves along the connection portion between the suspension arm 30 including the detection marker 236 and the steering knuckle 25 as indicated by an arrow F in FIG. The outer shape of the connecting portion is measured.
Further, the outer shape of the connecting portion between the suspension arm 30 and the steering knuckle 25 measured by the laser sensor 15 is processed in the data processing terminal 19 to generate the connecting portion outer shape data 253 that is the outer shape data of the connecting portion. To do. At that time, the connecting portion outer shape data 253 includes shape data 253a of the detection marker 236 provided on the suspension arm 230 as shown in FIG.

Next, in the matching step (step S03), as shown in FIG. 12, the first external shape data 251 and the second external shape data 52 generated in the first measurement step (step S01) and the second measurement are generated in the data processing terminal 19. Positioning is performed so that the respective outlines overlap with the connecting part outline data 253 generated in the process (step S02), and assembly structure outline data 254 is generated.
At this time, the alignment is performed so that the outer shape lines of the shape data 251a of the detection marker 236 in the first outer shape data 251 and the shape data 253a of the detection marker 236 in the connecting portion outer shape data 253 overlap.

  As described above, in the assembly portion position calculation system according to the present embodiment, the detection marker 236 that is a protrusion is disposed on the arm portion 31 a of the suspension arm 230. The first outer shape data 251 includes the shape data 251a of the detection marker 236, the connecting portion outer shape data 253 includes the shape data 253a of the detection marker 236, and the data processing terminal 19 sets the detection marker 236 in the first outer shape data 251. The alignment is performed so that the outer shape lines of the shape data 251a and the shape data 253a of the detection marker 236 in the connecting portion outer shape data 253 overlap.

In the assembly part position calculation method and the assembly part position calculation system according to the present embodiment, the first outline data 251 and the second outline data in the alignment step (step S03) are configured as described above. Thus, it is possible to improve the accuracy when aligning the position 52 with the connecting portion outer shape data 253.
Specifically, since the detection marker 236 which is a protrusion having a characteristic shape is arranged on the arm portion 31a of the suspension arm 230, the first outer shape data 251 and the connecting portion outer shape data 253 are also respectively provided. The characteristic shape data 251a and the shape data 253a are included. When the first outer shape data 251 and the second outer shape data 52 are aligned with the connecting portion outer shape data 253, the alignment is performed by aligning the positions of the characteristic shape data 251a and the shape data 253a. This makes it easy to improve the alignment accuracy.

DESCRIPTION OF SYMBOLS 10 Position calculation system of assembly | attachment part 11 Laser type measuring machine 19 Data processing terminal 25 Steering knuckle 30 Suspension arm 51 1st external shape data 52 2nd external shape data 53 Connection part external shape data 54 Assembly structure external shape data 61 Design data 71 Assembly Location data

Claims (6)

A first part having an assembly part, the design data indicating the position and shape of the assembly part being known, and a second part having the part to be assembled, the assembly part being the assembly part In the assembling structure connected by being inserted into, the position calculating method of the assembling part,
Measuring the outer shape of each of the first part and the second part before connection, and generating first outer shape data and second outer shape data;
Measures the outer shape of the connecting part between the first part and the second part in the assembly structure in which the first part and the second part are connected, and generates connecting part outer shape data. A second measuring step;
The first contour data and the second contour data generated in the first measurement step and the connection portion contour data generated in the second measurement step are aligned so that the respective contour lines overlap. A matching process for generating assembly structure outline data,
The position shape of the assembly part with respect to the second part is obtained by aligning the design data that is already known and the assembly structure outline data generated in the matching step so that the outlines thereof overlap each other. A position calculation step for generating assembly part position data indicating:
A method for calculating the position of the assembly part. Before the matching step, the correction step of generating the corrected first outer shape data by removing the outer shape data other than the connecting portion with the second part from the first outer shape data generated in the first measurement step With
In the matching step, instead of the first outer shape data, using the corrected first outer shape data generated in the correction step, generate assembly structure outer shape data,
The position calculation method of the assembly | attachment part of Claim 1 characterized by the above-mentioned. The first component is provided with a detection marker,
The first outer shape data generated in the first measurement step includes shape data of the detection marker,
The connection part outline data generated in the second measurement step includes shape data of the detection marker,
In the matching step, by aligning the shape data of the detection marker in the first contour data and the shape data of the detection marker in the connecting portion contour data so that the respective contour lines overlap, Generate assembly structure outline data,
The method for calculating the position of the assembling unit according to claim 1, wherein the position is calculated. Measuring means for measuring the outer shape of the measuring object;
Data operating means for generating and processing outer shape data from the outer shape of the measurement object measured by the measuring means; and
A first part having an assembly part, the design data indicating the position and shape of the assembly part being known, and a second part having the part to be assembled, the assembly part being the assembly part A position calculating system for an assembling part that calculates a position of the assembling part in an assembling structure connected by being inserted into
By the measuring means,
Measure the outer shape before connecting the first part and the second part,
In the assembly structure in a state where the first part and the second part are connected, measure the outer shape of the connecting part between the first part and the second part,
By the data operation means,
Generating first outer shape data and second outer shape data based on the outer shape before connecting the first part and the second part;
Based on the outer shape of the connecting portion between the first component and the second component, generating the connecting portion outer shape data,
By performing alignment so that the respective outline lines of the first outline data and the second outline data, and the connection part outline data overlap, generate assembly structure outline data,
The assembly portion showing the position shape of the assembly portion with respect to the second part by performing alignment so that the outlines of the design data and the assembly structure outline data that are known overlap each other. Generate location data,
An assembly part position calculation system characterized by the above. By the data operation means,
From the first outer shape data, generating corrected first outer shape data by removing outer shape data other than the connecting portion with the second component,
In place of the first outer shape data, the modified first outer shape data is used to generate assembly structure outer shape data.
The system for calculating the position of the assembling unit according to claim 4, wherein: The first component is provided with a detection marker,
The first outer shape data includes shape data of the detection marker,
The connecting portion outer shape data includes shape data of the detection marker,
By aligning the shape data of the detection marker in the first contour data and the shape data of the detection marker in the connecting portion contour data by the data operation means so that the respective contour lines overlap, Generate assembly structure outline data,
The position calculation system of the assembly part according to claim 4 or 5, characterized by the above-mentioned.

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