JPS58168441A - Inner roll replacing device for electric welded pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inner roll changing device for electric resistance welded pipes, which allows the inner roll changing operation in a cage forming stand of electric resistance welded pipe manufacturing equipment to be carried out efficiently and safely by remote control.

When manufacturing an electric resistance welded tube, the material is led to a cage forming stand where it is roll formed into an arc shape.

By the way, in the cage forming stand mentioned above, the inner roll (inner forming roll) installed so as to be in contact with the inner surface of the material can be used for pipe sizes up to a range of sizes, but if it exceeds that range, it can be used to fit the inner surface of the material. This is not possible.For this reason, the cage forming stand has several inner rolls that can be replaced to match the pipe size.

However, conventionally, as shown in Figure 1, the inner roll (1
), a guide member (4) vertically guides a removable connecting frame (3) to an inner roll unit (2) rotatably equipped with a connecting frame (3);
A support frame (7) is provided with a jack (5) that supports the jack (5) so as to be able to rise and fall freely along the vertical axis (4), a drive device (6) that operates the jack (5), etc., and the support frame (7) is attached to a cage forming stand (8). ) on the structure (9) so that the inner surface of the material QQ can be guided by the inner roll (1), and the height of the inner roll (1) is adjusted by the jack (5). can be adapted to the inner surface of the material frame, and also the support frame (7)
The structure of the stand (
9), and when replacing the roll, connect a suspension wire to the support frame (7) and use a factory crane to suspend the inner roll unit (2) as shown by the arrows (α) and (b) and move it vertically and horizontally. Since the connection frame (3) and the trawl unit (2) are uncoupled at the roll shop and the rolls are replaced, the following problems arise regarding roll replacement.

(1) Dangerous work such as hanging wire must be performed at high places.

(11) Poor workability and inefficiency.

The present invention has been made to solve the above problems, and includes an inner roll conversion trolley that is movably provided on a rail extending from an appropriate position above the cage forming stand to the side of the stand, and an inner roll unit attached to the trolley. The present invention is characterized in that an elevating device for lifting and lowering a removable roll unit holding section is provided.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 and FIG. 5 show an example of the present invention, in which a cage forming stand (8β pass line center α4 is perpendicularly intersected with the cage forming stand from an appropriate position above the stand to a roll shop 0 on the side of the stand) is formed. Two sets of rails q■α extending in parallel (G) and (7) are laid on a horizontal beam (G) that is integrally constructed with the stand structure aη.The running wheels 4 and the drive are transferred on the one rail α51051. A bogie ■υ equipped with wheels (A), and a bogie (C) equipped with running wheels (A) and driving wheels @ that move on the other rail (G) (to).
A hydraulic clamping device (not shown) is attached to the inner roll unit (2), which is integrally provided with a support frame (7) and rotatably equipped with the inner roll (1).
A guide member (A) that vertically guides the connecting frame (roll unit holding part) that can be attached and detached by the holder, and a plurality of jacks that support the connecting frame (E) so that it can be raised and lowered along the guide member (A). by placing them at the required positions on the support frame), the center of the pass line (to)
A plurality of inner rolls (1) are positioned at intervals of one foot along the road so that they can guide the inner surface of the material "4+".In the above, the inner roll unit (2) is It is necessary to be able to raise the connecting frame (E) to a height that does not interfere with other materials on the stand, and lower the connecting frame (E) to a height where the inner roll (1) touches the inner surface of the material (E) during molding. Furthermore,) is the bellows casing that slides the screw (7) on the jack, 0υ is the drive device that operates the jack, and n) is the outer roll that guides the outer surface of the material QQ. (To) is a moving device that slides the stand (■) supporting the outer roll (2) to move the outer roll (2) forward and backward toward the material (to), and (To) receives the new inner roll unit. The roll table (to) is a stand for receiving the old inner roll unit, and the upper part is a hydraulic clamp device for fixing the trolley Qυ above the center of the pass line (to).

In the above embodiment, the inner row /1z(
7) When making the O-ru intersection, move the outer roll (2) backward from the pass line center α as shown in the diagram, and in this state operate the jack (E) to move the inner roll unit (2) After raising it from the position during molding (a) to a position where it does not interfere with other equipment when the trolley is running (b), disengage the clamping device □□□ and the trolley ■υ and remove the
to be able to run freely. After that, the trolley is driven to the roll shop αΦ, and the trolley is moved to the roll shop αΦ.
Operate the jack (c) at the top and lower the inner roll unit I-(2) completely. Inner roll unit (2
) Once it is on the corolla stand (7), uncouple the inner roll unit (2) from the connecting frame (4), and clamp the new inner roll unit from the other roll stand (7) to the connecting frame). . After the attachment of the old and new rolls has been changed in this way, the jack (c) and cart Qυ are operated in the opposite manner as described above, and the cart 21) is fixed above the pass line by the clamping device), and the inner roll is Set the unit (2) to the molding position (A). Since all of the above operations can be performed automatically, roll replacement work can be performed safely and efficiently. Note that when replacing the inner roll on the trolley side, the same procedure as above is followed.

4 and 5 show another embodiment of the present invention which can be implemented without making any changes to the existing stand, and shows another embodiment of the present invention which can be implemented without making any changes to the existing cage forming stand (8711) similar to that shown in FIG. Two sets of rails extend in parallel to each other, perpendicular to the pass line center a1, from an appropriate position above the stand to the roll shop α fathom on the side of the stand.
, -1 is laid on the horizontal beam ■, and 0η is the support pillar supporting the horizontal beam), and Leno v of the one set (31
(A bogie (/A7) equipped with a running wheel (6) that transfers on 5j and a driving wheel ■, and a running wheel that transfers on the other set of rails 01■) and a driving wheel) A plurality of screws (four screws in the figure) are provided in each of the carts so as to be rotatable but not movable in the axial direction, and are screwed into the screws. The edge of the support frame (7) is provided with a removable bracket, the lid is provided so that it can be moved up and down along the screw by cartwheeling the screw, and the lid is provided so that it can be moved up and down along the screw by turning the screw. A drive device (5 υ) is installed on each cart (goods) θ, and the output of the drive device (5 υ can be transmitted to the screw (t) by a transmission mechanism. the lifters can be raised and lowered simultaneously in the same direction and each lifter can be lowered to a height at which the locking devices can engage the edges of the support frame (7) on the stand structure (9). , also a receiving object.
When the trolley is traveling with the support frame (7) engaged with the support frame (7) and the support frame (7) lifted, each lifter flash should be set at a height above which the inner roll unit (2) will not interfere with the stand structure (9). I'm allowing it to rise. In the figure (52), the support frame (7) is attached to the stand structure (
9) shows a hydraulic clamp device that can be attached and detached, and the same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

As mentioned above, the connecting frame (3) and the supporting frame (7)
In the embodiment in which the roll unit holding part is configured as follows, when replacing the inner roll on the trolley ■ side,
The support frame (7) fixed on the stand structure (9) by a clamp device is released from the clamp device (5) to make it possible to raise the support frame (7), and then the support frame (7) is fixed to the top of the stand. Lower the lifter wheel from the cart and engage the support frame (7) of the lifter, then raise the lifter and move the inner roll unit (2) from the molding position (A). , pull up the trolley to a position (b) where it will not interfere with the stand structure (9) when running, and then drive the trolley to above the roll shop (141). ) so that the inner roll unit (2) is placed on top of it.Then, replace the rolls in the same way as shown in Figure 2.After replacing the old and new rolls in this way, place the inner roll unit (2) on the cart is operated in the opposite manner to the above to guide the new roll upwards on the stand, lower the lifter, and release the support frame (7) from the support frame (7) to clamp the support frame (7) to the clamp device (52). The stand structure (9) is fixed to the stand structure (9), and a new roll is set in the position at the time of molding (mouth J).If carried out in this way, the roll can be replaced automatically, making the roll replacement safe and efficient. It has the advantage that it can be used as is, and the existing stand can be used as is.

In Fig. 4, the stand structure (9) and the support frame (7) are attached and detached using a hydraulic clamp device (5), but in some cases it may be possible to attach and detach the stand structure (9) and the support frame (7) using the conventional pin 0υ and cotter (6). It may also be done by

Furthermore, the present invention is not limited to what is shown in the above-mentioned embodiments; for example, the number of trolleys may be increased or decreased as appropriate, and it goes without saying that various modifications can be made without departing from the gist of the present invention. be.

As described above, the present invention enables the inner roll replacement work to be performed automatically by remote control, and therefore has the excellent effect that the inner roll replacement work can be performed safely and efficiently.

Figure 1 is a front view of a conventional cage forming stand.
2 is a front view showing an example of the present invention, FIG. 5 is a plan view thereof, FIG. 4 is a front view showing another embodiment of the present invention, and FIG. 5 is a plan view thereof.

(1)... Inner roll, (2)... Inner roll unit, (3))... Connecting frame, (4
) @...Guide member, (5) (C)... Jacket,
(6) 0υψυ...drive device, (7)@...support frame, (8)...cage forming stand,
Shout...material, al...pass line center, a4...
Roll shop, α51 (to) @■...L/-le, Q
υ...1ri...trolley, @(groan...flang device, -・
・・Receiver, −・・Lifter.

patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. to

Claims (1)

[Claims] υ An inner roll exchange trolley is movably installed on a rail extending from an appropriate position above the cage forming stand to the side of the stand, and the trolley is equipped with a lifting device that lifts and lowers a roll unit holder that can be attached and detached from the inner roll unit. An inner roll changing device for electric resistance welded pipes.