JPH0718994A - Edge cutter of warped plate - Google Patents

Abstract

PURPOSE:To easily cut the edge of warped plate and obtain a high quality product, by positioning a warped plate at the front end of a table after pins of a pusher are inserted into the holes of the transferred warped plate and cutting both ends by a cutter. CONSTITUTION:When a warped plate W transferred by a conveyor 30 comes in contact with a stopper 430, it is raised by a lifter 450 and a psitioning pusher 470 is actuated to raise the claw of arm 473 and bring it into contact with the outer peripheral end. And then a cylinder 476 is acturated to pull the warped plate toward this side to position it on table 460. Next, the arm 485 of a work pusher 480 is lowered and the pins 486 are inserted into two holes and the arm 485 is advanced to stop at the forward end of cylinder 484. Next, the upper blade of a cutter body 405 is lowered to cut both ends of warped plate W. Then the work pusher 480 is moved backward to draw the product W out and the work pusher 480 is raised and the lifter 450 is lowered and the stopper 430 is raised. And the conveyor 30 is started to move to transfer the products W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end cutting device for a curved plate material such as a main girder that constitutes a segment for tunnel lining.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a ring R for tunnel lining used in a shield construction method. The ring R is formed by connecting a plurality of segments A, B and K. In this case, the types of segments include A type, B type, K type, etc., each of which is formed in a box shape.

FIG. 6 shows an example of an A type segment. The segment A includes a main girder 1 as a curved plate material which is a problem here, a rectangular joint plate 2, and a skin plate 3.
Consists of. The main girder 1 is formed by bending a strip plate in an arc shape in its width direction and cutting both ends in the radial direction.

The manufacturing process of the main girder 1 is shown in FIG. When manufacturing the main girder 1, the following procedure is performed. (1) First, prepare a long strip plate for material removal (a: material preparation). (2) Bending is performed in the plate width direction so as to have a predetermined curvature (b: bending step). (3) Rough cut slightly larger than the product length (c: bare cutting step). (4) Inspect the degree of curvature (curvature = R = R) (d: R
Check process). (5) Drilling is performed to connect the segments to each other (e: drilling step). (6) Both ends are cut into positive dimensions (f: finishing cutting step).

Of these steps, conventionally, the finishing step (6) is usually carried out by using an integrated mold which is manufactured in accordance with a curved plate material which is a work. In this case, since the hole position and the like differ depending on the size of the work and the like, a mold is prepared for each type of work.

[0006]

Therefore, conventionally, since a mold is prepared for each type of work, there is a problem that the mold manufacturing cost and time are required.

Therefore, an object of the present invention is to provide an end cutting device for a curved plate material, which can easily cope with various kinds of works only by adjusting and does not need to prepare a die for each kind of works. .

[0008]

In order to achieve the above object, an apparatus for cutting an end portion of a curved plate material according to the present invention includes a table capable of moving the conveyed curved plate material in a substantially horizontal direction, and a table on the table. A positioning mechanism that positions the curved plate material at the rear end position, and a pin is inserted into the hole of the positioned curved plate material and the pin is moved to push the curved plate material forward and position it at the front end position. A pusher to hold, a cutter that cuts both ends of the curved plate material positioned at the front end position, a cutter position adjustment mechanism that adjusts the position of the cutter according to the size and shape of the curved plate material, and the size and size of the curved plate material. A cutter attitude adjusting mechanism for adjusting the attitude of the cutter according to the shape is provided.

[0009]

In the present invention, the curved plate material conveyed is first positioned by the positioning mechanism at the rear end position of the table. Next, the pin of the pusher is inserted into the hole of the curved plate material, and the curved plate material is moved to the front end position of the table by the pusher and positioned. At this time, since the pin is inserted into the hole, the pin is accurately positioned on the basis of the hole.
Then, in this state, both ends of the curved plate material are cut by the cutter. The end portion of the curved plate material is cut in a substantially radial direction, but the cutting position and the cutting direction differ depending on the type and size. Therefore, the position and attitude of the cutter are adjusted in advance by the cutter position adjusting mechanism and the cutter attitude adjusting mechanism in accordance with the target curved plate material.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the configuration of an embodiment of an end cutting device for curved plate material (hereinafter referred to as “finishing cutter”) according to the present invention,
FIG. 2 is a side view of the same, and FIG. 3 is a plan view of a main girder production line incorporating the finishing cutter of the embodiment.

First, an outline of the main girder production line will be described with reference to FIG. In FIG. 3, 11 is a loader that takes out long strips of material from the material storage area, 12 is a bender that bends while continuously feeding the strips, and 13 is a raw cutter that roughly cuts product material from the long strips of material. , 14 are R check devices for inspecting the curvature of the intermediate product of the main girder, 15
Is a pusher for discharging the defective product after the R check to the outside of the conveying path, 16 is a piercing device for making holes for connecting the segments (piercing device), 17 is a hydraulic unit of a press device constituting the piercing device 16, Reference numeral 18 is a finishing cutter (end cutting device for curved plate material according to the embodiment of the present invention) for finishing cutting both ends of the intermediate product into product dimensions based on the holes, 19 is a loader for taking out the finished product, and 20 is a product aligning device. 21 to 31 are roller conveyors for transportation,
Reference numerals 41 to 45 are operation panels for operating each device individually or in conjunction with each other.

In this system, the steps proceed in the following order. (1) Place a long strip plate material (material) in the material storage area in front of the loader 11. (2) The material is placed on the conveyor 21 by the loader 11. (3) The material is conveyed by the conveyors 21 and 22. (4) The belt material is sent to the bender 12 by the conveyor 22 and bent by the bender 12. (5) The band plate material after bending is passed through the cutter 13, and the cutter 13 cuts the front end portion. (6) Bender 1 of strip material for the length set on the main operation panel
The raw material is sent by 2, and the raw material cutter 13 roughly cuts the product material at the set dimension position. (7) After rough cutting, the intermediate products are conveyed to the conveyors 23, 24, 2
It is conveyed by No. 5 and sent to the R check device 14. (8) The R check device 14 determines whether the curvature is good or bad. (9) After the determination, it is conveyed by the conveyor 27, and the defective product is discharged by the pusher 15 while being conveyed. (10) Only non-defective products are pierced by conveyors 27, 28
Send to. (11) The piercing device 16 makes a hole, and the intermediate product is sent to the finishing cutter 18 by the conveyor 29. (12) The finish cutter 18 finish-cuts both ends of the intermediate product positioned on the hole basis to obtain a final product. (13) After finishing cutting, convey by conveyor 31,
The products are transferred to the product alignment device 20 by the unloader 19.

According to this system, from the supply of material,
A series of processes from bending, rough cutting, R-check, drilling, finishing cutting and product alignment can be performed almost automatically. Further, it is also possible to automatically eject the defective product after the R check.

Further, in this system, at a certain position of the bender 12, the feeding direction of the material is turned by 90 degrees corresponding to the bending of the material. Further, after that, the feeding direction is further turned by 90 degrees on the conveyors 23 and 24, and as a result, the material conveying direction makes a U-turn, and the take-out position of the final product is returned to near the first material storage area. As described above, since the present system has the U-shaped conveyance path corresponding to the bending direction of the material, the installation space is small and the monitoring work is easy. Further, the intermediate product which is curved in an arc shape and cut into a predetermined length is conveyed in a fixed posture, that is, in a posture in which the inner peripheral side thereof is always directed to the inside of the U-shaped conveyance path. Therefore, it is easy to convey the material, shortening the conveying route, etc.
It is possible to improve the transportation efficiency. In addition, since the intermediate product is conveyed in a fixed posture, it is easy to perform various process work, and the devices for performing the work can be arranged side by side on one side, realizing an orderly layout. can do.

Next, the finishing cutter 18 according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. The finishing cutter 18 has a base frame 401 on which the conveyor 30 is placed. In this finishing cutter 18, as shown in FIG. 1, the conveying direction of the conveyor 30 (a)
The X-axis direction is set in parallel with, and the Y-axis direction is set in the direction orthogonal to the conveyor 30.

Two cutter bodies 405 are arranged on the base frame 401. Cutter body 405
Is a cutter position adjusting mechanism 4 for adjusting the position in the X-axis direction.
02 and a cutter attitude adjusting mechanism 403 that adjusts the horizontal direction, and is supported on the base frame 401. The cutter position adjusting mechanism 402 includes an X-axis rail 407 arranged in parallel with the conveyor 30 and an X-axis rail 407.
Two cutter mounts 408 movably arranged above
And a rack and pinion mechanism 409 for moving each cutter mount 408. The cutter attitude adjusting mechanism 403 includes a turning shaft (not shown), a support mechanism for the turning shaft, and a clamp mechanism for fixing the turning shaft at an appropriate turning position.

As shown in FIG. 1, a stopper 430 for stopping the conveyed curved plate material W is provided above the conveyor 30 in the conveying direction. This stopper 430 is caused to enter the conveyance path by a mechanism (not shown) when necessary, stops the curved plate material W being conveyed, and is retracted outside the conveyance path when it is no longer necessary.
A sensor such as a photoelectric switch is attached to the stopper 430, and outputs a signal when the curved plate W hits the stopper 430.

A lifter 450 for lifting the curved plate material W on the conveyor 30 is arranged between the conveyor 30 and the cutter body 405. The lifter 450 forms a table 460 for horizontally moving the curved plate material W to the cutter body 405, and lifts the lift plate 451 that moves up and down the gap between the rollers 30a of the conveyor 30 and moves the lift plate 451 up and down. It is composed of a cylinder 452. The table 460 is formed on the upper surface of the lift plate 451 when the lift plate 451 is lifted.

As shown in FIG. 2, a positioning pusher (positioning mechanism) 470 is disposed below the conveyor 30. This positioning pusher 470 is a curved plate material W on a table 460 formed by the lifter 450.
Is pressed against the work guide 471 shown in FIG. 1 and positioned at the rear end position of the table 460. As shown in FIG. 2, a claw that engages with the outer peripheral end of the curved plate material W is provided at the front end. Arm 473, a cylinder 474 that lifts the arm 473 upward to engage the claw with the outer peripheral end of the curved plate material W, a mount 475 on which the arm 473 and the cylinder 474 are mounted, and this mount 475 in the Y-axis direction ( The cylinder 476 is moved in the front-back direction.

A work pusher 480 is arranged above the conveyor 30. This work pusher 480 has rails 481 provided along the Y-axis direction.
A moving frame 482 supported by these rails 481 and moving in the Y-axis direction, a cylinder 484 for pushing and pulling this moving frame 482, two arms 485 supported by the moving frame 482, and tips of these arms 485. It comprises a pin 486 protruding from the lower surface and a cylinder 487 for moving the arm 485 up and down. The pin 486 can be adjusted by adjusting the position of the arm 485.
The position of can be adjusted.

Further, the finishing cutter 18 is equipped with a control device (not shown) for taking in a signal from the stopper 430 and sequentially controlling the conveyor 30, the lifter 450, the positioning pusher 470, the work pusher 480, the cutter body 405 and the like.

Next, the finishing cutter 1 having the above construction.
The operation of No. 8 will be described. First, prior to the both-end finish cutting, the position and posture of the cutter body 405 are adjusted according to the type and size of the target work (curved plate material) W. At the same time, the work pusher 480, the positioning pusher 470, etc. are also adjusted.

With the preparation thus completed, the curved plate material W conveyed by the conveyor 30 is stopped by the stopper 43.
When it hits 0, the conveyor 30 stops and the lifter 450
Operates to lift the curved plate material W. Then, the positioning pusher 470 is actuated, and the claws of the arm 473 move up to engage with the outer peripheral end of the curved plate material W. When engaged, the cylinder 476 operates to pull the curved plate material W toward you. By pulling the end of the curved plate W until it contacts the work guide 471, the curved plate W is positioned at the rear end position on the table 460 formed by the lifter 450. After that, the arm 473 descends.

When the positioning is completed, the arm 485 of the work pusher 480 descends to move the work pusher 48.
No. 0 pin 486 out of two holes formed in the curved plate W
Enter one. Next, the arm 4 of the work pusher 480.
85 moves forward and stops at the forward end of cylinder 484. At this position, the curved plate material W is in a proper workable state with respect to the cutter body 405, and the pin 48 of the pusher 480 is
Positioned and held by 6.

Next, when positioned, the upper blade of the cutter main body 405 descends and cuts both ends of the curved plate material W to form a final product. The scrap material after cutting is discharged by the scrap ejector.

When the cutting is completed, the work pusher 4
80 retracts and pulls the product W onto the conveyor 30. Then, the work pusher 480 rises and the lifter 45
0 goes down, the stopper 430 goes up, and the conveyor 30
Restarts and conveys the product to the next process.

As described above, according to the main finishing cutter 18, it is possible to automatically finish-cut both ends of the curved plate material W to an appropriate size without requiring manpower, even if the initial setting is performed. Moreover, since the cutting position and the cutting direction can be adjusted simply by changing the position and the posture of the cutter body 405, it is possible to easily and inexpensively cope with various types of curved plate materials.

[0028]

According to the present invention, even for curved plate materials of different types and sizes, the end portion can be easily cut by just adjusting, and it is necessary to prepare a mold for each type of curved plate material. There is no. Therefore, the cost and time for preparing the mold can be saved. Further, since the curved plate member is positioned with respect to the cutter by using the holes formed in the curved plate member in advance, it is possible to obtain a product with a fixed size and high accuracy.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of a device for cutting both ends of a curved plate material according to the present invention.

FIG. 2 is a side view of the device.

FIG. 3 is a plan view of a main girder production line in which the manufacturing apparatus of the embodiment is incorporated.

FIG. 4 is a perspective view showing a ring for tunnel lining.

FIG. 5 is a front view showing a ring for tunnel lining.

FIG. 6 is a perspective view showing an example of segments constituting the ring.

FIG. 7 is a diagram sequentially showing a manufacturing process of a main girder of the same segment.

[Explanation of symbols]

 W Curved plate material 18 Finishing cutter of an embodiment of the present invention 402 Cutter position adjusting mechanism 403 Cutter posture adjusting mechanism 405 Cutter body (cutter) 460 Table 470 Positioning pusher (positioning mechanism) 480 Work pusher

Claims (1)

[Claims] 1. An end cutting device for a curved plate material for cutting both ends of a curved plate material having a plurality of holes, the table being capable of moving the conveyed curved plate material in a substantially horizontal direction,
A positioning mechanism for positioning the curved plate member at the rear end position on the table, and a pin inserted into the hole of the positioned curved plate member to move the pin to push the curved plate member forward and to move the front end position. With a pusher for positioning and holding, a cutter that cuts both ends of the curved plate material positioned at the front end position, a cutter position adjustment mechanism that adjusts the position of the cutter according to the size and shape of the curved plate material, and the curved plate material. And a cutter posture adjusting mechanism for adjusting the posture of the cutter according to the size and shape of the cutter.