JPH05319363A - Large unit assembly method - Google Patents

Abstract

PURPOSE:To keep the slit breadth of a transverse member small, and insert the transverse member from the end of a longitudinal member in a large unit assembly method where longitudinal members are first laid on a large plate and then transverse members are arranged. CONSTITUTION:The pitch of the slits 34 of a transverse member 30 and the slit breadth thereof are measured with high precision, and an insertion gap for passing a longitudinal member 20 is estimated on the basis of data available from the measurement. Then, the longitudinal member 20 is laid at an optimum position in the gap and automatically welded to a large plate 1. Thereafter, the transverse member 30 is inserted from the end of the longitudinal member 20 to the specified position, and both of the members 20 and 30, and the large plate 10 are automatically welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-scale assembly method for frame panels required for manufacturing hull blocks, and more specifically, it first assembles longes and large plates, and then inserts a transformer into the longes. It relates to a large assembly method of longe precedent welding and transformer insertion method by control.

[0002]

2. Description of the Related Art The construction of a ship generally proceeds with the loading, blasting, cutting, welding, and processing of steel materials, and progresses from small assembly to large assembly and block manufacturing. Conventionally, automation up to some small assembly has advanced considerably, but automation of large assembly,
There are still many difficulties in streamlining, which is the obstacle to its realization. Here, the main constituent members of the large assembly are three members, namely, a large plate, a longitudinal member as a longitudinal aggregate, and a transformer or floor (hereinafter simply referred to as a transformer) as a horizontal member,
The process of assembling the panel for the hull block using these three members as a framework is called large assembly. Heretofore, as such a large assembly method, there have been a longe preceding welding method and a frame method.

(1) Longe precedent welding method This method is a method of assembling the longe and the large plate first and then disposing the transformer, which is called a slot method.
Figure 8 shows the outline of this method. Further, FIG. 9 is a process diagram of this construction method.

Large plate manufacturing process (see steps S1 to S3 in FIG. 8A and FIG. 9) First, several steel plates 1 are sequentially subjected to automatic butt welding to manufacture a large plate 10 having a required size. Welding is performed by a gantry type automatic welding machine 80.

Longe provisional attaching step (see steps S4 to S5 in FIG. 8B and FIG. 9) Next, in order to attach the longes 20 such as L-shaped steel on the large plate 10 at predetermined intervals, first, the large plate 10 is to be attached. Longi Line 1
1 is scribed, the longe 20 is carried in and placed according to the scribe line 11, and then a temporary fixing jig 81 as shown in FIG. To do. This process is a heavy-duty manual work, and it is necessary to use a hammer, a jack, a crowbar, or other various tools to rub the longes 20 to the marking lines or to make the skin fit to the large plate 10.

Longe welding process (see step S6 in FIGS. 8 (c) and 9) The base of the longe 20 temporarily attached in the above process is automatically fillet welded from both sides by the gantry type automatic welding machine 82 at the same time. 20 is fixed to the large plate 10.

Transformer mounting process (see FIG. 8 (d), steps S7, S11 to S14 in FIG. 9) Next, a small-assembled transformer 30 is attached to several longe 20 mounted on the large plate 10. Insert from above and assemble in a cross shape.
0 is attached to each longe 20 by welding (step S
7). Slots 32 are preliminarily processed in the transformer 30 at predetermined intervals, and small bone members (not shown) are attached by welding. The process of manufacturing the transformer 30 (steps S11 to S14) is performed in parallel with the process from the manufacturing of the large plate to the long weld. Also, Longe 2
The slot 32 is formed wide so that the transformer 30 can be easily inserted even if 0 is slightly tilted due to welding distortion or the like. However, this lowers the bond strength, so that FIG.
It is necessary to connect the longe 20 and the transformer 30 using a color plate 31 as shown in (d). For this reason, eight welding points (points shown by an arrow w) are generated for each color plate 31. The welding of the color plate 31 is generally manual welding.

Transformer welding process (see FIG. 8 (e), step S8 in FIG. 9) The transformer 30 is manually welded to the large plate 10 and the longe 20,
The assembly of the panel 100 is completed.

Finally, a hanging piece, an outfitting component, and the like (not shown) are attached (step S9), and the panel 100 assembled as described above is carried out by a crane (step S10).

(2) Frame construction method This construction method is a method of assembling the transformer and the longe first, and then distributing the materials to the large plate, which is called a slit method.
In other words, it is a construction method in which the transformer and the longe are framed first and then mounted on a large plate. Therefore, it is only necessary to provide the transformer with a narrow slit for passing the longitudinal, and the above color plate is not required.

[0011]

The conventional method has the following advantages and disadvantages. (1) In the case of the Longe precedent welding method Multi-electrode high-efficiency welding can be performed with 45% of the panel welding length (which occupies most of the Longe welding length). On the other hand, a color plate is required, and the welding length increases by 30% in this mounting process, and automatic welding becomes difficult. In more detail, in the longe tacking process, we had to rely on human labor at all, and it was a heavy labor and the work was unstable.
The degree easily shifts. This inaccuracy has a great influence on the subsequent process, and often requires rework. Further, in the transformer mounting process, it takes a lot of manpower and time to mount the color plate.

(2) In the case of the frame construction method, since the color plate is not required, the welding length is shortened,
35% of the panel welding length (which is mostly occupied by the welding length of the transformer and the long section) has good workability and can be automatically welded. However, the welding efficiency after distributing this framework to a large plate is very poor, and automation is extremely difficult.

In the case of the frame construction method, there are too many difficulties in automatic welding after the large plate of the frame is distributed, but in the case of the longe preceding welding method, there is room for improvement in the longe tacking process, transformer mounting process, etc. It is believed that The first thing to think about is
The color plate is removed in order to take advantage of the Longe precedent welding method. As a result, at least 30% of the panel welding length can be reduced. Next, when the color plate is removed, the slit width of the transformer can be narrowed as in the frame construction method, but with this, the transformer must be inserted into the longe. The biggest problem with the transformer insertion method is that the installation error of the longe is very large and that the longe's posture is often tilted rather than straight. The point is whether you can do it.

The present invention has been made in order to solve the above problems, and the range in which the transformer can be inserted is estimated from the measurement data of the position and width of the slit, and the gap within the range is estimated. It succeeded in inserting the transformer by distributing the longe at the optimum position. Therefore, it is an object of the present invention to provide a large assembly method which is a longitudinal advance welding / transformer insertion method which does not require a color plate and which can be greatly automated and rationalized.

[0015]

According to the present invention, in a large assembly method of longe pre-welding in which a longe and a large plate are first assembled and then a transformer is distributed, (1) a slit pitch and a groove width of the transformer are measured. Step (2) Based on the data obtained in this slit measurement step,
A step of making a line of sight on the insertion gaps for passing the longes for all the transformers, and attaching each of the longes to the optimum position within the insertion gaps by welding. The above problem is solved by adopting a large assembly method including a step of attaching to the above by welding.

That is, according to the present invention, when the longitudinal aggregate, which is a longitudinal aggregate, is distributed on a large plate, the pitches and groove widths of all slits are first measured for all the transformers, which are transverse members, and actual measurement data is collected. .. Next, based on these measured data, the projection of the insertion gap for passing the longe is made on the data. Then, the optimum position in the insertion gap that minimizes the interference between the transformer and the longe is obtained. To do so, first set the insertion gap that is the criterion for determining whether or not the transformer and Longe interfere with each other, then move the transformer little by little to calculate the insertion gap, and the positive value is the largest (the interference is the smallest). ) Obtain the position, move the longe, calculate the insertion gap in the same manner, and obtain the position with the most positive value (the least interference). The longes are distributed to the optimum position thus obtained. If there are slits that interfere with each other, rework only those slits to widen the width. Each longe is tack welded to the optimum position, and then the longe is main welded. After that, insert the transformers in order from the end of Longe. The retracting type of the transformer is preferable to the pushing type. Since Longe is not always in an upright position,
It is necessary to correct the fall of Longe. In this case, since the base end of the longe is attached to the above-mentioned optimum position, the upper part of the longe may be raised so as to be upright. Therefore, in the present invention, the transformer is gradually pulled in while pressurizing the longe with different forces from both sides by, for example, hydraulic cylinders to raise the longe and correct it upright. The transformer can be fixed and retracted by, for example, an electromagnet of a self-propelled insertion device. Then, after all the transformers are inserted to a predetermined position, the slit portion and the small assembly member of the transformer are welded to the longe, and the lower part of the transformer is welded to the large plate, and the panel assembly is completed.

Further, the present invention adopts a numerical control method because it is necessary to control all the above steps with high accuracy.

[0018]

In the present invention, since the range through which the longe passes is observed from the measured data of the pitches and groove widths of all the transformers, and the longe is distributed at the optimum position within the range, so the large plate is longed. You can insert the transformer from the end of the longe even after installing. When inserting again,
Since the transformer is pulled in while elastically deforming the Longe and straightening it, the transformer is inserted while repeating the action of engaging the longie. Therefore, the slit of the transformer can be narrowed, and the conventional color plate is not required. Further, when the longe is distributed on the large plate, if only the reference position is decided, it is not necessary to draw the longe line, and the longe can be automatically distributed to the optimum position.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an outline of a large assembly method of the present invention, and FIG. 2 is a process diagram thereof. In FIG. 1, the steps of (b) and (d) are different from those of the conventional FIGS. 8 (b) and (d), respectively. Further, in FIG. 2, step S4 and step S
6, step S15 is a step newly provided in the present invention. This will be described below.

Large plate manufacturing process (see steps S1 to S3 of FIG. 1A and FIG. 2) This process is exactly the same as that of the conventional method.

Automatic slit measuring step (see the inside view of FIG. 1B, step S15 of FIG. 2) The distortion removal of the transformer 30 is finished (step S14).
Then, the pitch and groove width of the slits 34 of the transformer 30 are measured (step S15). The manufacturing process of the transformer (steps S11 to S14) is the same as that of the conventional method.
Further, the groove width of the slit 34 is processed so that the gap between the slit 34 and the web 21 of the longe 20 is minimized. The slit 34 has the flange 2 of the longe 20 at the top.
It has an elongated hole 35 for passing 2 and a scallop 36 at the bottom. The slit measurement is performed by, for example, an automatic laser measuring machine 40 as schematically shown in FIG. The automatic measuring machine 40 is configured such that a measuring carriage 41 runs a laser beam while emitting a laser beam in a direction perpendicular to the transformer. The measuring method is, for example, as shown in FIG. 3, when the transformer 30 is supported vertically and the laser beam is emitted in a direction perpendicular to the transformer 30 at a measurement line A having an arbitrary height and the longitudinal direction is traveled, a slit is generated. Since the ON / OFF signal is obtained for each position, the pitches P1, P2, ... P (n) of the slits 34 are synchronized by synchronizing the ON / OFF signal with the distance pulse counter and converting the number of pulses into the distance.
Also, the groove widths G1, G2, ... G (n) can be automatically measured with an accuracy of ± 0.1 mm. The measurement data is stored in the database of the large assembly control device (numerical control device) 50.

Longy automatic tacking process (FIG. 1 (b), FIG. 2)
In this step, first, based on the measured data of all the slits obtained above, as shown in FIG. 4, a gap for passing the longe 20 from the data, that is, the insertion gaps Gs1, Gs2 ,. Get a Gsn perspective. FIG. 4 shows the insertion gaps Gs (n-1) and Gs of the (n-1) th and (n) th slits of n transformers when the line of sight is observed.
It shows (n). When the slit measurement data is aligned with one end of each transformer as a reference, the minimum gaps Gs (n-1) and Gs (n) of the lines connecting the slit ends are measured gaps Gs (n-1) and Gs as shown in the figure. The value is smaller than (n), and the interference between the transformer and the web is considered. Therefore, the positions of the transformer and the tentatively determined longe are finely adjusted to calculate the position with the least interference. First, move each transformer little by little so that the margin gap (gap when actually inserting) is 0 or more with respect to the reference gap set in advance for the determination of the interference between the transformer and the longe, and the position where the interference is smallest. Then, the longe is moved to find the position with the least interference. If the difference between the allowance gap and the reference gap becomes a negative value, the entire length cannot be passed therethrough. Therefore, only the relevant slit of the transformer, which is considered to cause interference, is modified to widen the width. In this way, the margins g (n-1) and g (n) are taken into consideration to determine the optimum mounting span L (n) of the longe 20, and the longi 20 is distributed by numerical control with the mounting span L (n). And tack welding.

Therefore, for example, a self-propelled aggregate material distribution mounting device 60 as schematically shown in FIG. 1 is used. FIG. 5 shows the schematic configuration and operation of the tacking device 62 of the device 60. Temporary device 6
2 is a pair of electromagnets 64 provided under the gate-shaped main body 63.
And a reference hydraulic cylinder 65 and a positioning hydraulic cylinder 66 installed to face the side of the main body 63. Each hydraulic cylinder 65, 66 has a reference pressing plate 67 and a positioning pressing plate 68, respectively. A pushing cylinder 69 is provided on the upper part of 63. In such a structure, first, the gantry 6 of the self-propelled aggregate material distribution attaching device 60
1 is positioned, the tacking device 62 is lowered, the electromagnet 64 is turned on, and the tacking device 62 is fixed to the large plate 10 (FIG. 5).
(A)). Next, the reference pressing plate 67 is set to the reference position by the reference hydraulic cylinder 65 (FIG. 5B), and then the positioning pressing plate 68 is pushed by the positioning hydraulic cylinder 66 from the opposite side with a load smaller than the reference hydraulic cylinder 65.
The web 21 of the longe 20 is clamped from both sides to stand upright (FIG. 5 (c)). Lastly, push cylinder 69
Press the flange 22 of 0 to attach the lower end of the longe 20 to the large plate 10.
Apply to the skin. In this state, a welding torch (not shown) attached to the tacking device 62 tack-welds the base portion of the longe 20 from both sides (arrow w). In this way, one longe 20 is temporarily and accurately attached at a pitch of about 400 mm. In addition, the longe 20 defines a reference position at one end of the large plate 10, and sequentially distributes materials from the reference position with the optimum mounting span L (n) obtained in the slit measuring step. Therefore, it suffices to determine only the first reference position, and it is not necessary to mark the longe line as in the conventional case.

Longe automatic welding process (Fig. 1 (c), Fig. 2)
This step is exactly the same as that of the conventional method.

Automatic transformer insertion process (Fig. 1 (d),
(See step S6 in FIG. 2) Since all the longes 20 have been attached to the optimum positions in the above process, the transformer 30 is sequentially inserted from the end of the longes 20 in this process. The transformer is inserted by using, for example, an automatic horizontal member inserting device 70 as shown in FIG. The device 70 is configured such that the transformer 30 is fixed and pulled in by an electromagnet 71.
The electromagnet 71 is connected to the dolly 72 having a guide rail. The drive unit of the carriage 72 is provided with press cylinders 75 having drive rollers 73 and 74 on both sides.
The carriage 72 is made to travel with the flange 22 and the like sandwiched therebetween. The displacement sensors 76 for detecting the fall of the longe 20 are arranged on the left, right, up and down. Although FIG. 6 shows one retractor unit, a retractor unit is installed between each of the longes.

FIG. 7 shows the detection method by the displacement sensor 76 and the correction method of the longe 20 when the longe 20 and the transformer 30 are relatively inclined. That is,
Let L1 and L2 be the distances measured by the displacement sensor 76 on the left side, and R1 and R2 be the distances measured by the displacement sensor 76 on the right. (A) When L2> L1 and R1> R2 , The hydraulic pressure of the left press cylinder 75 is increased to correct the longe 20. (B) When L1> L2 and R2> R1, the hydraulic pressure of the right press cylinder 75 is increased to straighten the longe 20. (C) Then, the longe 20 is corrected by the above method until L1 = L2, R2 = R1, and then the hydraulic circuit is controlled so that the above state (L1 = L2, R2 = R1) is established. Keep 20 in neutral (upright) position. In this way, the transformer 30 is gradually pulled in while correcting the fall of the longe 20. Since the proximal end of the Longe 20 is attached with the optimum span as described above, the Longe 20
It is enough to pull in the transformer 30 while raising the upper part of the
The transformer 30 is inserted into the longe 20 with a clearance or with a gap. The transformer 30 is sequentially inserted to a predetermined position. The dolly 7 of the insertion device 70
A welding robot (not shown) may be installed in No. 2 and the sub-assembly member of the transformer 30 may be temporarily welded to the longe 20 at a predetermined position.

Transformer automatic welding process (see step S7 in FIG. 1 (e) and FIG. 2) In this process, the transformer 30, the longe 20 and the large plate 10 are welded using a welding robot (not shown).
Since the slit 34 of the transformer 30 is formed as narrow as possible, automatic fillet welding with the longe web 22 can be performed directly without using a color plate as in the conventional case. Therefore, as shown in FIG. 1 (e), the welding portion of the slit portion may be four. As described above, the assembly of the panel 100 is completed.

Thereafter, as in the conventional case, the hanging piece, the fitting parts and the like are attached (step S8), and the panel 100 is carried out (step S9).

[0029]

As described above, according to the present invention, since the range in which the transformer can be inserted is determined from the slit measurement information of the transformer and the longes are distributed at the optimum positions, the transformer is inserted from the end of the longes. Can be plugged in well. Further, since the present invention is the longe preceding welding / transformer insertion method, the welding portion of the slit portion of the transformer, which is conventionally required, is reduced, and at least 30% of the panel welding length can be reduced in this portion, so that the welding efficiency is improved. .. Accordingly, automatic welding of the transformer, the longe, and the large plate becomes possible, and as a whole, 80% of the panel welding length can be automatically welded. Therefore, the present invention is 25000.
Time / ship, personnel can be expected to be reduced by 40, and significant rationalization can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic view showing a large assembly method of the present invention.

FIG. 2 is a process drawing of the large assembly method of the present invention.

FIG. 3 is an explanatory diagram showing a slit measuring method according to the present invention.

FIG. 4 is an explanatory diagram showing a method of viewing an insertion gap according to the present invention.

FIG. 5 is an explanatory diagram showing a method for attaching aggregate material according to the present invention.

FIG. 6 is an explanatory view showing a method for inserting a horizontal member according to the present invention.

FIG. 7 is an explanatory diagram showing an aggregate correcting method according to the present invention.

FIG. 8 is a schematic diagram of a conventional method.

FIG. 9 is a process drawing of a conventional method.

[Explanation of symbols]

 10 Large plate 20 Longe (longitudinal aggregate) 30 Transformer (horizontal material) 34 Slit 40 Laser automatic measuring machine 50 Large assembly control device (numerical control device) 60 Self-propelled aggregate material distribution mounting device 70 Horizontal material automatic insertion device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Ikebata, 1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Akihiko Nakano 1-2-1-2, Marunouchi, Chiyoda-ku, Tokyo Main Steel Pipe Co., Ltd. (72) Inventor Hiroshi Murayama 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Sadaaki Sakai 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Within the corporation

Claims (3)

[Claims] 1. First, longitudinal aggregates are welded to a large plate at predetermined intervals,
Then, in a large assembly method for assembling a frame panel by welding a horizontal member having a slit into which the vertical aggregate is inserted to the large plate and the vertical aggregate at predetermined intervals, a large assembly method comprising the following steps. (1) Step of measuring the pitch and groove width of the slits of the horizontal member (2) Based on the data obtained in the slit measuring step,
Line of sight of the insertion gaps for passing the vertical aggregates for all the transverse members, and attaching each vertical aggregate by welding at an optimum position in the insertion gaps. (3) From the ends of the vertical aggregates A step of inserting the cross members in order and attaching the cross members to a predetermined position by welding. 2. The method of inserting the cross members into the vertical aggregates, wherein the cross members are pulled in while pressing each of the vertical aggregates from both sides to correct it to an upright state. Large assembly method described. 3. The large assembly method according to claim 1, wherein all of the steps are controlled by a numerical control method.