JPS58181412A - Method and device for pre-sledding in pipe rolling - Google Patents

Abstract

PURPOSE:To eliminate the waiting time of rolling stands and to improve productivity, by mounting a shell and a bar on plural pre-sledding rolls of a line placed separately from a rolling line, and inserting the bar after aligning the bar with the shell. CONSTITUTION:A shell 1 taken out from a piercer is brought into contact with a shell stopper 8 by an aligning line 7 to measure the length of the shell 1 by position detectors 9a-9f. Pre-sledding rolls 6a-6c corresponding to the detectors 9a-9c detecting the shell 1 are raised and lowered properly so as to previously align the center of the shell 1 with that of a bar 2 when the bar 2 is inserted into the shell 1 on an inserting line 3. Next, the shell 1 on the aligning line 7 is parallelly transferred onto the inserting line 3 to mount it on the rolls 6a-6c. The bar 2 is guided by pre-sledding rolls 6d-6f to insert it into a hollow part of the shell 1. Thus a rolling is started after transferring the shell 1 having inserted bar 2 to a rolling line 4 and then guiding said shell to rolling stands 10.

Description

DETAILED DESCRIPTION OF THE INVENTION +The invention relates to a prethreading method and apparatus for pipe rolling in which the work of inserting a bar into a shell can be easily performed at a location other than the rolling line.

Conventionally, bars are inserted into nonyl using separate methods for shell and bar sound during online tube rolling. For example, a chain drive with a series of feed mechanisms is used, and the lifting and lowering is performed using a slope jack.

The method of raising and lowering the shell is usually equipped with the maximum shell length, so in the case of a short shell, there will be a step between the shell and the bar until the bar reaches 7 L, making it difficult to insert the bar into the shell. It is clear that this will be difficult. To compensate for this, the worker always attaches and detaches the bar guide each time the length of the shell changes (for shells shorter than the maximum length) while the bar reaches the shell. Unfavorable from the viewpoint of work safety.

In addition, since the bar insertion work was performed online, there was a waiting time during tube rolling, resulting in disadvantages such as poor productivity.

The present invention has been made to solve the above-mentioned drawbacks, and embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show an outline of the present invention, in which a bar (2) is inserted into the hollow part of the shell (1), an insert line (3) is installed parallel to the entire rolling line (4), and
f, along the insert line (3) along the shell stock collar (
5) and a plurality of (6 in the figure) pre-thread rolls (6α) (6/) that can be raised and lowered are arranged in this order, and an insert line (3) and an insert line (3) are placed in order to measure the length of the shell (1). The shell stopper (8) and the bliss red roll (6α tongue f) are attached to the aligning line (7) provided in parallel.
The same number of position detectors (9α bar 9/) are placed in the same positional relationship as that of the insert line (3) with the shell stock rolls (6α) −<6f). The position detector (9αt(9/)・
The shell on the alignment line (7) measured by
(1) Corresponding to the length of the Bliss Red Roll (6α
Toro f) to the part on which the shell (1) is placed (for example, A1 to the sixth bliss red roll (6α) (66) (6C))
and the part where the bar (2) is guided, for example, the fourth to sixth pre-thread rolls (6d) (66) (Lf))
The shell (1) and the bar (2) can be aligned in advance by distinguishing between them and raising and lowering the whole image part as appropriate.
On the insert line (3), the bar (2) is extruded in the (z) direction using a suitable means such as a rubber shear to form a shell (
It is possible to insert a bar (2) line into 1).

The diameter of the shell (1) is stored in advance in a preset control panel (not shown), and a signal is sent from the preset control fi1m to raise and lower the breath red roll, so that the amount of elevation of the breath red roll can be controlled as appropriate. That's what I do.

Next, the operation will be explained.

The shell (1) taken out from the punching machine is guided to the aligning line (7) and brought into contact with the shell stopper (8) to be held at a predetermined position on the aligning line (7).

The length of the shell (]) is measured by the position detector ('9G) arm 9/) in the collapsed state, and the first to third position/extraction devices (9α) detect the shell (]). (9b) (9c)
The first to sixth bliss red rolls (6α) corresponding to
(6b) (6c) or shell (1) Fourth to sixth position detectors that do not detect all (9d) (9g) (9/)
Fourth to sixth bliss red rolls (64) corresponding to
(6g) (67)k, so that when inserting the bar (2) line into the shell (1) on the insert line (3), the center of the shell (1) and the middle part of the bar (2) can match. The shell (1) is raised and lowered appropriately according to the outer diameter of the shell (1).

After that, the shell (1) on the aligning line (7) is moved parallel to the aligning line (3) by a chain etc., and the first to third bliss red rolls (6G) (6M
) (6c). Next, 7C-(2) All the fourth to sixth bliss red rolls (6d) (6g) (6f) guide the (6d) (6g) (6f) to extrude it in the (1) direction, and the 7el stopper (5) shiel ( 1) Insert the bar (2) line into the hollow part of the shell (1) while suppressing the movement of the bar (2).

Once the bar (2) is inserted into the line in this manner, it is transferred to the rolling line (4) using a conveyor having an arcuate motion or the like, and guided to the rolling stand 0.0 to start rolling.

Figures 3 and 4 show the operation of the lifting device for the Bliss Red Roll, in which two shaft support members α3 are fixed at a distance from each other to a mounting base 02 fixed on a frame C11). The swinging member α valley is fixed to both ends of the rotating shaft 04) extending in the horizontal direction by passing through the hollow part of the both shaft supporting members α, and a brace thread is fixed between the swinging member α. A roll θ7) is arranged, and both ends of the bliss red roll 07) are rotatably attached to the swinging member 0υ by bearings 08), and the end of the swinging lever θ is attached to the middle part of the rotating shaft 0υ with a key ( The IJJ member is fixed by the lever (1) and the tip of the screw shaft (A) of the worm jack 121 provided on the frame 0υ is connected by the link (C), and the 9IJJ member is swung by the vertical movement of the screw shaft @. θ swings around the rotating shaft (14) so that the breath red roll (17) can be raised and N, and a coupling (C) and a reduction gear (1) are connected to the input shaft (C) of the worm jack ■υ. ), etc., to connect the lifting drive motor @. The length of the wire is -1 which detects all the operating states of the worm jack Qυ and detects all the lifting and lowering positions of the breath red roll θ.
(2) indicates a bar.

When using a lifting device with such a structure, each bliss thread roll (6α) to (6f) will be controlled independently from each other, but the shell (]) has a standard length, and for example, As shown in Figure 1, the first to third bliss red rolls (6a) (6b) (6c) always have a shell (1).
When only the worm jacks Qυ in the lifting devices of the first to third pre-thread rolls (6σ) (6b) (6C) are connected with the transmission shaft (to) as shown in Fig. 5, one The first to fifth pre-thread rolls (6Q), (6A), and (6C) may be moved up and down in conjunction with the transmission (5).

When the interlocking lifting device is used in this way, it is economical because the number of driving devices can be reduced.

FIGS. 6 and 7 show other embodiments of the interlocking lifting device, in which cylindrical shaft support members 01 G+1 C12 provided at intervals lf along the insert line rotate @ a
C34) a! Insert the il through the rotating shaft (to) [Yes]
(c) The swing members (36a) (3fJ) (36C) and swing levers (37a) (37A) (37c) are fixed to the swing members (36a) (36A) (36C). 3
The pre-thread rolls (6a) (6b) (6C) are provided at 1'l rotation, and each swing lever (37α) (
37b) (37C) are connected by a rod, and the six swing levers (37Q) are driven by the cylinder device 01.
) <376) (37C) can be swung in conjunction with each other, and as a result, the first, second, and third ``Bliss Red Rolls (6α) (663 (s,)) can be raised and lowered at the same time. .

Also, the pre-thread roll (6α) (6b) (6c
), a swing lever (41) other than the swing lever (37a) is fully fixed on the rotating shaft c3, and a stopper (4I
) A worm (45) is provided at the tip of the screw shaft (42) and meshes with the screw shaft (42).It is rotated by a fully electric motor and can move in the entire axis direction of the screw shaft. 4I)- to the swinging lever (E)) so that the swinging angle of the swinging lever 00 can be fully adjusted by moving the swinging lever (E)) forward and backward.
6α) (66J (6c) All models have a structure in which the height can be adjusted according to the outer diameter of the shell.

FIG. 8 shows another embodiment of the present invention in which the length of the shell can be measured while the shell is running.
) is installed adjacent to the aligning line (7) to measure the length of the shell (1) while the shell (1) is running.
Distinguish the pre-thread roll (6α tongue f) according to the length of the shell (1) and the part where the bar (2) is guided, and raise and lower the image part as appropriate to connect the shell (1) and the bar. (
2), the shell (1) is conveyed to the insert line (3) along the path shown.

Note that the present invention is not limited to the above-mentioned embodiments; for example, in each of the above-mentioned embodiments, an example was shown in which the pre-thread roll is not driven and the per-fully extruded insert is inserted by an appropriate means such as a pusher. It goes without saying that the bar may be inserted by driving the pre-thread roll so that the bar can be driven by the pre-thread roll, and that various other modifications can be made without departing from the gist of the present invention.

As described above, in the present invention, the bar is inserted into all the shells before the online rolling process, so the bar can be inserted into the next shell during rolling and kept on standby. Therefore, as soon as rolling is finished, the next rolling This eliminates waiting time at the rolling stand and improves productivity. In addition, in the present invention, the plurality of pre-thread rolls are divided into a part on which the shell rests and a part where the bar is guided according to the length of the shell, and all the image parts are raised and lowered as appropriate to fully align the shell and the bar. As a result, the bar can be fully automatically inserted into shells of various sizes, and the breath threading operation can be performed in the cylinder.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the outline of the present invention, Fig. 2 is a view taken along the arrows -■ in Fig. 1, and Figs. Figure 6 is a sectional view of a lifting device that lifts and lowers each roll individually;
Fig. 4 is a view in the direction of the ■ arrow in Fig. 5, Fig. 5 is a schematic diagram showing an example of an elevating device in which a plurality of rolls are all interlocked to move up and down, and Fig. 6 is a diagram showing another example of an interlocking elevating device. FIG. 7 is a side view showing a cross-sectional view of FIG. 6, and FIG. 8 is a schematic plan view showing another embodiment of the present invention. (])...Shell, (2)...Bar, (3)-...
Insert line, (4)...(E g line%
(5) (8)...Shell stopper, (6a) to (6
/) a71・Bliss red roll, (7)...aligning line, (9a) to (9f)...position detection u
, a4J□□□ (2) C9...Rotation axis, OS (36a
) (36A) (36C) --- Swinging member, 09 (3
7a) (376) (37C) (4Q...swing lever,
I2D... Worm jack, C3 (43... Screw shaft, rzsr-... Link, @(43... Electric motor, (to)... Sensor, OI... Cylinder device,
Pieces υ...stopper, (44)...measuring device. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Patent applicant Japan IRff Co., Ltd.
fl63-

Claims (1)

[Scope of Claims] 1) A shell (!: bar) is placed on a plurality of bliss red rolls provided along a line different from the rolling line, and a bliss red roll on which a shell is placed and a bliss red roll on which a bar is placed are placed as appropriate. Raise and lower the bar to align it and insert it into the length'f!: A characteristic pre-threading method in tube rolling. 2) On the line where the entire bar is inserted into the shell,
A plurality of Bliss Red rolls equipped with all lifting devices, a device that sends a signal corresponding to the length of the shell to the Bliss Red rolls, and a device that controls the length of a predetermined number of Bliss Red rolls on which 7Ls are placed. Bliss red device at pipe pressure tl+gic which is set to standby.