JPH03103512A - Manufacture of coupling structure and manufacture of long large bridge main tower block - Google Patents

Abstract

PURPOSE:To improve centering precision of a bridge by a method wherein the structures, manufacture of which is completed, of a plurality of structures intended to be coupled together are temporarily theoretically assembled, and data of the three-dimensional coordinate of a temporary assembly shape is utilized as correction data for centering a subsequent manufacturing structure. CONSTITUTION:A block W is supported in horizontally placed orientation of a stress free natural body by means of a servo cylinder 3 set on an NC surface plate 2. The positions of the corners of the block W are measured by using four three-dimensional coordinates measuring devices 5 and are inputted as coordinates data to a system controller 1. A shape intrinsic to the block W is recognized to perform three-dimensional display on a display. The block core of the actual block W is calculated and determined by a controller 1, and the upper end lower end surfaces of the block W are cut along one vertical plane to form upper and lower touch surfaces between the adjoining blocks W. Further, the blocks W are intercoupled for temporary assembly, data of the three-dimensional coordinate of the temporary assembly shape is utilized as correction data for centering a subsequent manufacturing block W.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention supports a structure in a stress-free natural posture,
A method of manufacturing a connected structure based on the natural posture of the body, and a method of manufacturing a long bridge main tower as a structure. /Relating to a method of manufacturing.

[Prior Art] Traditionally, for structures such as long bridge main tower blocks assembled vertically aligned and bridge blocks assembled horizontally aligned, the final In order to meet the strict construction accuracy requirements for long bridge towers and bridges, it is necessary to accurately inspect the unique shapes of these structures. In other words, it is necessary to accurately obtain data on the essential deflections and torsions unique to these structures, and to reflect that data in centering the structures and cutting the structures together.

Conventionally, when manufacturing structures that are connected in this way, when accurately inspecting the unique shape of the structure,
The structure is placed in its natural posture when it is constructed, that is, in its natural, stress-free posture with no external restraining force applied to the structure. Therefore, for example, in the case of a structure that is assembled vertically, such as a main tower block of a long bridge, it is necessary to understand the essential nature of the structure by assuming the vertical natural posture in which it is assembled. Deflection and twisting will be detected.

[Problems to be Solved by the Invention] As described above, conventionally, when inspecting the unique shape of a structure, its posture has been taken as the natural posture when the structure is constructed.

However, depending on the shape of the structure, it may be difficult to maintain the structure in its natural position during construction. For example, if the structure is a large vertical bridge main tower block, placing it vertically poses an obstacle in terms of safety and shortening the process.

So, Honde. The applicant previously proposed a method for manufacturing a connecting structure and a main tower block for a long bridge (Japanese Patent Application No. 63-261119).

The ``method for manufacturing a connected structure'' included in this existing proposal involves placing the structure on a plurality of jack devices for support, and controlling the lifting force of each jack device to vertically position the structure. To safely and efficiently maintain a stress-free, natural body posture regardless of whether it is placed horizontally. The structure can then be inspected, processed and manufactured with high precision based on the posture of the natural body. On the other hand, the ``method for manufacturing a long bridge main tower PRO NOK'' is a method that can manufacture a long bridge main tower block as a structure by inspecting and processing it with high precision.

This invention was made in connection with such development, and aims to more completely satisfy the strict centering accuracy of the final long bridge main tower or bridge that connects multiple structures. . In order to achieve this purpose, among the multiple structures to be connected, the manufactured ones are temporarily assembled on a desk, and the three-dimensional coordinate data of the temporarily assembled shape is used for the next structure to be manufactured. This is intended to be used as correction data for centering.

[Means for Solving the Problems] (1) A method for manufacturing a connected structure according to claim 1 includes: a connected structure for manufacturing a plurality of structures connected by touching surfaces of end portions facing each other. In the manufacturing method of objects, first, the structure is supported in a stress-free natural posture, the three-dimensional coordinates of the structure at that time are determined, and then the shape of the structure is recognized from those data and the core is determined. Then, while supporting the structure in its natural, stress-free posture, cut the edge of the structure using the core of the structure as a reference to shape the touch surface. Regarding the two structures in which the front and back are connected, the two structures can be touched in their natural posture with no stress from the individual three-dimensional coordinates obtained earlier. Assuming that the two structures are temporarily assembled by butting them against each other, we calculate the three-dimensional coordinates of the temporary assembled shape on the desk in that case, and then calculate the data of the three-dimensional coordinates of the temporary assembled shape on the desk for those two structures. , it is characterized in that it is used as correction data when centering a next-stage structure that is connected next to those two structures.

(2) The method for manufacturing a long bridge main tower block according to the second claim comprises: a plurality of long bridge main tower blocks connected sequentially from the bottom to the top, with the end touch surfaces facing each other; In the manufacturing method of the long bridge main tower block, first, the long bridge main tower block is supported in a stress-free natural horizontal position, and the three-dimensional coordinates of the long bridge main tower block at that time are determined, and then, From the three-dimensional coordinate data, the shape of the long bridge main tower block is recognized and centered, and then, while the long bridge main tower block is supported in a stress-free natural horizontal position,
Using the core of the long bridge main tower block as a reference, cut the end of the long bridge main tower block to form a touch surface, and then Regarding the two long bridge main tower blocks to be connected, from the individual three-dimensional coordinates obtained earlier, the two long bridge main tower blocks are placed horizontally in a stress-free natural position, and their touch surfaces are butted against each other. Assuming a case of temporary assembly, calculate the three-dimensional coordinates of the temporary assembly shape on the desk in that case, and then calculate the three-dimensional coordinate data of the temporary assembly shape on the desk for those two long bridge main tower blocks by calculating them. The present invention is characterized in that it is used as correction data for centering the upper long bridge main tower block connected above the two long bridge main tower blocks.

[Operation] This invention centers the structure in a stress-free natural posture, forms the touch surface of the structure using the center as a reference, and then connects the touch surface front and back. The following three-dimensional coordinate data is obtained for two structures.

"Three-dimensional coordinate data" Based on the individual three-dimensional coordinates of those two connected structures, the three-dimensional shape of the temporary assembly on the desk is calculated based on the assumption that the connected structures are temporarily assembled in their natural, stress-free postures. Original coordinate data.

Then, these three-dimensional coordinates are used as Uramasa data when centering the next stage of connected structures that are connected next to these two connected structures.

This allows the temporary assembly shape data of the previous structure to be connected to be reflected in the fabrication of the next structure one after another. Satisfies centering accuracy more completely.

[Example code] Embodiments of the present invention will be described below based on the drawings.

In this embodiment, a long bridge main tower block W is treated as a structure. First, the long bridge main tower block W will be briefly explained.

"About the long bridge main tower block W" As shown in FIG. It is assembled by bolting together two outer cells W2, W2, and each cell Wt, W2, W2 itself is assembled by welding.

A plurality of blocks W constitute a long bridge main tower by being connected in the Z-axis direction in the vertical direction, and the upper and lower surfaces of the blocks W that overlap each other serve as touch surfaces that are butted against each other. The touch surface is formed by cutting using the block core in the Z-axis direction of the block W as a reference, and by connecting the blocks W in the vertical direction by butting the upper and lower touch surfaces against each other, the final long bridge is formed. It is designed to meet strict construction precision requirements for the main tower.

Such a block W has the following special characteristics.

(2) The block W is slightly twisted and deformed due to the influence of distortion occurring in the three cells Wl, W2, and W2 themselves. The distortions in the cells Wl, W2, and W2 that cause this occur when the members are arranged or welded, and are inherent deformations that cannot be determined by calculation. Naturally, the twist of the block W caused by these deformations is unique and cannot be determined by calculation. In the following, this twist will be referred to as "manufacturing twist."

■Also, when the block W is placed vertically as shown in FIG. 9(a), that is, when the Z axis of the block W is placed in the vertical direction, the block W
Although it contracts in the axial direction, it is not restrained externally. Therefore, ``manufacturing torsions'' appear as they are without being constrained. In addition, in the figure, the block W is simplified as a rectangular parallelepiped.

■Also, when the block W is placed horizontally as shown in Fig. 9(b), that is, when the Z axis of the block W is placed horizontally, there is a gap between the left and right support points as shown by the dotted line in the figure. This results in a calculated deflection for a beam spanned over a beam. Since the block W has many webs and flange materials that can resist as a support beam, when the block W is symmetrically supported at multiple points, the deflection as a beam is extremely small and there is no possibility of "torsion due to manufacturing". In comparison, the effect on machining accuracy is extremely small. In the following, this deflection will be referred to as "deflection as a beam."
That's what it means. On the other hand, "manufacturing twist" is restrained at the support point and does not appear on the surface. Note that the block W is also simplified as a rectangular parallelepiped in the figure.

In the case of this embodiment, such a block W is manufactured using the equipment shown in FIGS. 4 and 5, and the manufacturing process consists of the following eight steps A to H.

■ Structural analysis A of the ideal block W ■ Manage the reaction force at the support point of the block W, and
Reaction force management to support the body in a stress-free natural posture B ■ Shape confirmation C to check the shape of the block W and center it ■ Centering of the block W D ■ Level adjustment to adjust the centering level of the block W E ■ Machining of the touch surface of the block W F ■ Inspection of the block W G ■ Temporary assembling of the block W in two horizontal stages F Below, these steps will be explained separately.

"Structural Analysis A" This structural analysis A is a structural analysis of an ideal block W by the system controller I.

First, the system controller 1 and its related devices will be explained. The system controller 1 operates according to a structural analysis program and a system control program, and its main functional units include a calculation unit and a control unit, which will be described later. A plurality of electro-hydraulic servo cylinders (condenser device) 3 incorporated in an NC surface plate (mounting table) 2 are connected to the system controller 1 through a servo driver (see FIG. 3) 4.

The servo cylinder 3 is equipped with a hydraulic sensor (pushing force sensor) that detects the pushing up force from the hydraulic pressure, and a stroke sensor that detects the pushing up amount from the amount of protrusion of the cylinder. In addition, the system controller 1 has
A total of four three-dimensional coordinate measuring devices 5 provided around the NC surface plate 2 are connected. As shown in FIG. 3, this three-dimensional coordinate measuring device 5 is composed of an electronic theodolite 5a and a data processing device 5b.

The system controller l connected in this way is the seventh
The operations of steps sl, s2, and s3 in figure (a) are performed.

That is, first, the shape and weight of the ideal block W are input from the drawing information (step Sl), and the situation data when the ideal block W is placed symmetrically on each servo cylinder 3 is calculated. (Step S2). The data is the theoretical reaction force, support position, and deflection (corresponding to "deflection as a beam") of each servo cylinder 3, and these are printed out (Stenop S
3).

Here, the ideal block W has an ideal shape without "manufacturing twist", as shown by the dotted line in FIG. 6(a). On the other hand, the actual block W has a shape with "manufacturing twist" as shown by the solid line in the figure.

"Reaction force management B" This reaction force management B is a management in which the block W is placed in a stress-free natural horizontal posture by the servo cylinder 3 set on the NC surface plate l. Therefore, its management location is the installation position Pi of the NC surface plate 2 (see FIG. 4).

In this example, cells w1, w2, W2 are placed on the NC surface plate 2.
Step S4 in FIG. 7(a) also includes the work of bringing in the parts and bolting them together to assemble Bronok W.
- Corresponds to S8.

That is, first, a receiving position for the block W is determined on the NC surface plate 2 (step S4), a plurality of blocks (see Fig. 2) 6 are laid down at the receiving position, and a jack 7 for temporary placement is set (step S4). S5).

Then, place the cells W1 and w2 on the temporary jack 7.
, w2 are placed horizontally and bolted together. Therefore, the block W is assembled in a horizontal position.

After that, the servo cylinder 3 is raised by position control to lift the block W, and the loads that the servo cylinder 3 receives at that time are totaled to determine the actual weight of the block W (
Step S6). The actual weight of the block W is compared with the weight of the ideal block W obtained in the previous step S1, and the theoretical reaction force value calculated in the previous step S2 is corrected and recalculated. (Step 97). For example, the theoretical reaction force value is increased or decreased by an amount corresponding to the ratio between the actual weight of the former and the weight of the latter to obtain the eye drift reaction force value. After that, the pressure of the servo cylinder 3 is controlled, and the target reaction force value and the servo cylinder 3 are
(Step S8) and ideally make them coincide.

As a result, the load of the block W on each servo cylinder 3 and the pushing up force of each servo cylinder 3 are canceled out, and the block W assumes a stress-free natural horizontal posture. In this horizontal position, the ``deflection of the block W as a beam'' is extremely small, and relatively large ``torsion due to manufacturing'' appears as a large deformation.

Therefore, the bottom surface of the ideal block W is shown in FIG. 6(b).
When represented by the dotted line in the middle, the real block W has its bottom surface twisted to a unique shape as shown by the solid line in the figure.

"Shape Confirmation C" This shape confirmation C is the work of confirming the shape of the block W in the horizontal position of a stress-free natural body and centering it, and includes the steps shown in FIGS. 7(a) and (b). 89~S1
Corresponds to 4.

That is, first, the stroke sensor of each servo cylinder 3 detects the amount of protrusion of the cylinder, that is, the amount of push-up of the block W (step S9). Then, the system controller 1 determines the shape of the bottom surface of the block W, that is, the shape of the bottom surface unique to the block W due to "manufacturing twist" from the detected value of the amount of pushing up, and displays it on the display (step S10). do.

After that, the corner positions of the block W are measured by four three-dimensional coordinate measuring devices 5 provided around the NO surface plate 2,
Obtain the external dimensions of block ~V from the measurement data (step Sll), and input it to the system controller l as coordinate data of block W (step Sl2)
. The system controller l recognizes the unique shape of the real block W based on the input coordinate data of the block W (
Step SI3), the unique shape of the recognized real block W and the shape of the ideal block W are three-dimensionally displayed on the display (step S14).

"Centering D" This centering D is the system controller! This is the desk centering of the real block, that is, the calculational centering, and the seventh
This corresponds to steps S15 and 16 in Figure (b).

That is, the system controller 1 compares the shape of the recognized real block W with the shape of the ideal block W, and adjusts the real block W so that each dimensional difference between the two blocks W is equal to or less than a predetermined tolerance value. The block core of is determined by repeated calculations (step S15). Here, this centering is referred to as automatic centering (1). In the centering calculation, the table-top temporary assembly cutting allowance correction data of the previous block W obtained in step S36, which will be described later, is utilized as correction data. The corrected data will be described later. The centering result is displayed on the display (step S16)
.

"Level Adjustment E" This level adjustment E is performed by adjusting the direction of the entire real block W while keeping the real block W in a stress-free natural horizontal position, and then adjusting the block core that was centered on the desk and the NG surface plate 2. Figure 7(b)
．． This corresponds to steps Sl7 to 92B in (c).

That is, first, the system controller 1 calculates the amount of cylinder protrusion in each servo cylinder 3, that is, the amount of pushing up of the actual block W, as the attitude control amount of the block W (step S17).

The amount of pushing up is determined by each servo cylinder 3 necessary for the purpose of tilting the entire actual block W on each servo cylinder 3 in its natural horizontal position and aligning the block center with a predetermined horizontal direction. corresponds to the position control amount. This control amount is obtained by interpolation calculation.

The Urama calculation is based on the following: ■ The actual three-dimensional coordinates of the corner of the block W measured in the previous step Sll, ■ Predicting the case where the block center coincides with a predetermined horizontal direction, and after the predicted attitude control. Based on the predicted three-dimensional coordinates of the corners of the block W in , and the two-dimensional coordinates of the support points of each surf cylinder 3 on the bottom surface of the block W (considered as a "plane"), linear interpolation is performed based on the planar positional relationship. This is a calculation to obtain the Z coordinate position of each servo cylinder 3 after the predicted posture control, that is, the expansion/contraction control amount.

Therefore, by controlling the expansion and contraction of each servo cylinder 3 by the amount of control calculated by interpolation, the entire actual block W is inevitably tilted in its natural horizontal position, and the center of the block is aligned with the predetermined horizontal direction. I will do it.

The reason why the block core was set in a predetermined horizontal direction was because machining F in the next operation was taken into consideration. That is, the next machining process F is an operation in which the upper and lower end surfaces of the blocks W are cut along one vertical plane to form upper and lower touch surfaces between the blocks W under the control of the system controller l. The block core was set horizontally so that the touch surface it formed was located on a vertical plane.

In Fig. 6(c), the ideal posture of the block W is represented by a dotted line, the posture of the actual block W in its natural horizontal posture and before the level adjustment of the block core is represented by a two-dot chain line, and the level of the block core is represented by a two-dot chain line. The posture of the real block W after the reduction is represented by a solid line. O in the figure is the block core after the level adjustment of the block core.

After controlling the posture of the block W and adjusting the level of the block core, the next step is to obtain the "marking information" necessary for the machining process F.
or check the centering.

That is, first, the three-dimensional coordinate measuring machine 5 measures the three-dimensional coordinates of the corners of the block W after posture control again, and also measures the "writing targets" attached near both ends of the block W forming the touch surface. Three-dimensional coordinates are measured (step Sl9). These measurement data are input to the system controller 1 as position coordinate data of the block W after attitude control (step S20).

After that, the system controller l re-recognizes the shape of the real block W after posture control and the position of the "marking target" (step S21), and uses these information to center the block W again for confirmation. (Step S22
). Here, this re-centering is referred to as automatic centering (2). The centering result is displayed on the display (step S23). Thereafter, "marking information" for forming the touch surface of the block W, such as data such as the edge distance corresponding to the cutting allowance of the touch surface, is input (step S24).
), and displays the "marking information" on the display (step S25). Then, print out the scribing data for scribing the block core and the data for machine cutting the touch surface as a work instruction sheet, and print out the data for checking the centering results as a check sheet. (Step S28).

The operator checks from the latter check sheet whether or not the block W is centered within a predetermined tolerance range (step 928), and if it is outside the tolerance range,
Return to step S6.

If it is within the allowable range, proceed to the next machining step F.

"Machining F" As mentioned above, this machining F is performed by cutting the upper and lower end surfaces of the blocks W along one vertical plane under the control of the system controller 1 to form the upper and lower touch surfaces between the blocks W. It is a processing operation to form.

This machining work is performed at a machining position P2 (see FIG. 4) that is distant from the installation position Pi of the NG surface plate 2, and corresponds to steps 929 to S31 in FIG. 7(d). At the processing position P2, a turntable 10 that rotates in a horizontal plane and a cutting machine 11 that moves vertically and horizontally in one vertical plane are installed. Furthermore, a travel line for the block moving cart is formed between this processing position P2 and the installation position Pi of the NC surface plate 2.

First, the block moving cart moves to the installation position PI of the NC surface plate 2, gets under the block W, and places the block W thereon. Then, the block moving cart carries the block W on it and travels to the processing position P2, and transfers the block W onto the turntable 10.

A leveling block is set on the turntable 10, and a block W is placed on this.

The height of the leveling block is adjusted, and the attitude of the block W on the table 10 is the processing attitude. The processing posture is the posture after the level adjustment of the block core in the previous "Level adjustment E", and in order to reproduce that posture, the work instruction sheet and check sheet printed out in the previous steps 826 and 27 must be aligned. Utilize data from In FIG. 7(C), the set of heights of the leveling blocks is set as a block set (step S29).

Thereafter, the turntable lO is rotated 90 degrees to direct either the upper end or the lower end of the block W, on which the touch surface is formed, toward the cutting machine l1.

Then, based on the distance data between the "scribbling target" and the touch surface obtained earlier, the block W
The vertical cutting surface of the cutting machine l1 is aligned with the marking line (imaginary line on three-dimensional coordinates) for forming the touch surface. Then, by the cutting machine 11,
One end of the block W is cut (see FIG. 6(d)) to form one touch surface. After forming it,
Rotate the turntable 10 by 180 degrees and do the same in the same way.
The other end of block W is cut to form the other touch surface. In FIG. 7(c), such a touch surface is formed by machining (step S30).

Thereafter, a block core is scored on the surface of the block W on the turntable IO (step S31).

"Inspection G" This inspection G is a work to inspect the shape of the block W after the upper and lower touch surfaces have been formed under the control of the system controller l. Place it in a horizontal position.

This inspection is performed on the NC surface plate at the inspection position P3 (see FIG. 5), which is located away from the processing position P2, and corresponds to steps 932 to S35 in FIG. 7(d). A total of four three-dimensional drift measuring machines 12 are installed at the inspection position P3, and a travel line for the block moving cart is formed between the inspection position P3 and the previous processing position P2.

First, the block W is moved from the processing position P2 to the NG surface plate at the inspection position P3 by the block moving cart. Then, the block W is inspected in the posture after the level of the block core has decreased in the previous "level adjustment E" (see Fig. 6 (
(see e)). Therefore, the turntable in "Machining F" above! Similar to setting the block W on the leveling block W on the inspection position ifP3, a leveling block is set on the NC surface plate at the inspection position ifP3, and the block W is placed on it (step S32). The height of the leveling block has been reduced, and the block W is reproduced in the posture after the previous leveling, that is, in a stress-free natural body with the center of the block in a predetermined horizontal direction.

Thereafter, the four three-dimensional coordinate measuring instruments l2 provided at the inspection position P3 measure predetermined inspection items regarding the block W (step S33), and the system controller l converts the measurement data into coordinate data of the block core and block shape. (step S34), and prints out a member inspection form (step S35). Data regarding the perpendicularity of the end face of the block W, the length of the member, the cross-sectional dimensions, the torsion of the member, etc. are entered in the member inspection form.

After that, the current block W that is currently being measured and the lower block W that has been manufactured earlier and will be constructed below the current block W are temporarily assembled on the basis of calculations, and the corrected cutting allowance data, that is, the cutting Line correction data is created (step 836).

The corrected data is printed out (step S
37) and is fed back to step St5 when manufacturing the next block W. Then, the next block W that will be manufactured later and constructed on top of the current block W
This is reflected as correction data for the desk centering calculation.

“Horizontal 2-stage temporary assembly F” This horizontal 2-stage temporary assembly F is the system controller! This is the work of temporarily assembling the current block W and the previously manufactured lower block W under the control of , and during the temporary assembling, the blocks W are placed in a stress-free natural horizontal position.

This temporary assembly work is performed at a temporary assembly position P3 that is far from the inspection position P3.
4 (see Fig. 5), and Fig. 7(e)
This corresponds to steps 938 to S47.

First, the system controller! creates block set conditions for the temporary set (step S38). Then, according to this block setting condition, the touch surfaces of the current block W and the lower block W manufactured earlier are brought into contact with each other, and they are temporarily assembled in a horizontal position as shown in FIG. 6(f) (step S39).

After that, the touch surfaces are inspected to see if there is metal contact with each other, the verticality of the block cores is inspected, the misalignment is inspected, and the spacing between connecting holes is measured (step S40).
Data for splicing is created from these data (step S41), and these data are printed out as a processing instruction sheet for placing a splice order (step S42).

After that, each dimension in the temporarily assembled state is measured (step S
43), and print out the results on a check sheet (step S44). Then, the final verticality is estimated (step S45), and the results are printed out (step 846) and stored (step S47).
). Further, the estimation result of the final verticality is reflected in step S36 of the next-stage pro-soku W to be created, and becomes correction data for the cutting allowance. Thereafter, the temporarily assembled blocks W are separated, and the current block W is kept nearby for temporary assembly with the next stage block W, while the previously created lower stage block W is carried outside.

Thereafter, the next block W is manufactured in the same manner as the current block W. Then, temporarily assemble them. Therefore, all the touch surfaces of the blocks W constituting the main tower of the long bridge are butted against each other by temporary assembly. Then, the final verticality estimated each time it is temporarily assembled is successively reflected as the manufacturing data of the next block W, and as a result, the final vertical accuracy strictly required for the main tower of a long bridge is satisfied.

In addition, in this embodiment, in addition to the three-dimensional coordinate data from the temporary assembly on the desk, the three-dimensional coordinate data from the actual temporary assembly is obtained, and these data are used as manufacturing data for the next block W. , it is sufficient to obtain and use only the former data.

Of course, if both data are obtained and used as in this embodiment, manufacturing accuracy will be further improved.

[Effect] As explained above, the present invention allows virtual temporary assembly of already manufactured structures on a desk among a plurality of structures to be connected.
The three-dimensional coordinate data of the temporary assembly shape is used as correction data for centering the structure to be manufactured next, so the data of the temporary assembly shape of the previous structure to be connected is used one after another for the next structure. This will be reflected in the fabrication of structures, making it possible to more completely satisfy the strict centering accuracy of the final long bridge main towers and bridges that connect multiple structures.

In addition, as a structure, a long bridge main tower block can be manufactured with high precision.

Further, the present invention can be widely applied as a manufacturing method for various connected structures that are connected to each other, in addition to the main tower blocks of long bridges.

[Brief explanation of drawings]

The drawings are diagrams for explaining an embodiment of the present invention in which the main tower block of a long span bridge is used as a structure, in which Fig. 1 is a perspective view of the NO surface plate and its peripheral equipment, and Fig. 2 is a perspective view of the NG FIG. 3 is a schematic configuration diagram of the system controller and its peripheral equipment; FIGS. 4 and 5 are schematic perspective views of the structure manufacturing equipment; FIG. Figure (a
) to (f) are explanatory diagrams of the manufacturing situation of the structure, and Figure 7 (a)
-(e) are flowcharts for explaining the manufacturing procedure of the structure, FIG. 8 is a perspective view of the structure, FIG. 9(a) is a schematic perspective view when the structure is placed vertically, and FIG. b) is a schematic perspective view when the structure is placed horizontally. P4...Temporary assembly position.

Claims (2)

[Claims] (1) In a method for manufacturing a connected structure in which a plurality of structures are manufactured by connecting the touch surfaces of the ends against each other, first, the structures are supported in a stress-free natural posture; The three-dimensional coordinates of the structure are determined at Using the core as a reference, cut the end of the structure to form a touch surface, and then, with respect to the two structures on which the touch surface is formed and which are connected in front and back, From the individual three-dimensional coordinates, assuming that the two structures are temporarily assembled by butting their touch surfaces against each other in their natural, stress-free postures, the three-dimensional coordinates of the temporarily assembled shape on the desk in that case are calculated. Then, the three-dimensional coordinate data of the temporary assembly shape on the desk for these two structures is used as the correction data for centering the next structure that will be connected to the two structures. A method for manufacturing a connected structure characterized by: (2) In the method of manufacturing a long bridge main tower block, in which a plurality of long bridge main tower blocks are manufactured in which the touch surfaces of the ends are brought into contact with each other and connected sequentially from bottom to top, first, the long bridge main tower block is manufactured by: The 3D coordinates of the long bridge main tower block at that time are determined by supporting the tower block in a stress-free natural horizontal position, and then the shape of the long bridge main tower block is recognized from the 3D coordinate data. Then, while supporting the long bridge main tower block in its natural horizontal position with no stress,
Using the core of the long bridge main tower block as a reference, cut the end of the long bridge main tower block to form a touch surface, and then Regarding the two long bridge main tower blocks to be connected, from the individual three-dimensional coordinates obtained earlier, the two long bridge main tower blocks are placed horizontally in a stress-free natural position, and their touch surfaces are butted against each other. Assuming a case of temporary assembly, calculate the three-dimensional coordinates of the temporary assembly shape on the desk in that case, and then calculate the three-dimensional coordinate data of the temporary assembly shape on the desk for those two long bridge main tower blocks by calculating them. A method for manufacturing a long bridge main tower block, characterized in that correction data is used for centering an upper long bridge main tower block connected above two long bridge main tower blocks.