JPH0557308A - Automatic exchanger for plug - Google Patents

Abstract

PURPOSE:To automatically exchange plugs different in plug diameter and plug length easily and surely to a plug bar. CONSTITUTION:A plug automatic exchanger 10 to attach and detach a plug for manufacturing a seamless tube to and from the tip point of a plug bar is provided with a truck 11, a plug receiving base 15, a plug clamping device 22 and a new plug setting device 25, the plug clamping device 22 can adjust the height and position of a chuck according to the plug diameter, the new plug setting device 25 can adjust a back face setting position of a new plug 1B to the plug clamping device 22 according to the plug length and provides (a) a removing function of an old plug and (b) an attaching function of a new plug.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic plug changing device.

[0002]

2. Description of the Related Art An inclined roll type rolling mill for producing a seamless steel pipe is hollow or faithful by a pair of upper and lower or left and right rolling rolls and a plug arranged in the center of the rolling region sandwiched between the rolling rolls. The material to be rolled is piercing-rolled. At this time, the plug is attached to the tip of the plug bar for use, and is replaced at the time of life or size change.

In the case where the plug replacement work is manually performed, the work load and the productivity decrease of the worker due to the high heat and heavy reinforcement work are brought about, and therefore automation is being studied.

However, the plug has a shell-like shape,
Since it is a rolling object with a circular cross section and its length is relatively short, it is very difficult to accurately and accurately automate the attachment / detachment of the plug bar at the replacement location. There is. Conventionally, as such a difficult automatic plug exchanging device, there is one described in JP-A-57-209706.

[0005]

However, the prior art has the following problems. The conventional technology has an equipment structure in which the center line of the new plug and the old plug, the center line of the plug bar, and the center between the two rolling rolls coincide with each other. For this reason, when changing the plug size that has various types of plug diameter and plug length, the conventional technology adjusts the plug pushing device, the case mounting table, the plug pushing device, the plug conveying device, and the rubber-like elastic body in the holder. Or it must be replaced, and the setup change work accompanying the change in the plug size is very complicated.

The new plug is attached to a plug bar that advances with respect to the plug. At this time, the plug bar is long and easily bent, and it is difficult to position the plug bar with respect to the new plug.

It is an object of the present invention to easily and accurately automatically replace a plug having a different plug diameter and a different plug length with respect to a plug bar.

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to an automatic plug exchange device for attaching and detaching a seamless steel pipe manufacturing plug to and from a plug bar tip, and moves the plug bar tip from the original position to the plug exchange position where the plug bar tip can be stopped. With a dolly that is possible,
A plug pedestal that is disposed on the trolley, can support the lower surface of the old plug, can discharge the old plug in an inclined state, and can also support the lower surface of the new plug, and is disposed on the trolley. , A plug clamp device equipped with a chuck that allows the old plug at the tip of the plug bar to be automatically centered and clamped, and the new plug on the plug receiving base to be automatically centered, and the new plug to be the plug receiving base It has a new plug setting device that sets the clamp position by the upper plug clamp device, the plug clamp device can adjust the chuck height position according to the plug diameter, and the new plug setting device is a new plug for the plug clamp device. The rear surface setting position can be adjusted according to the plug length. (A) Under the condition that the carriage is stopped from the original position to the forward position and the plug clamp device is set to the plug exchange position, Clamp the old plug at the end of the plug bar at the plug replacement position with the plug clamp device,
Then, by retracting the carriage to its original position, the old plug clamped by the plug clamp device is extracted from the tip of the plug bar, and the extracted old plug is unclamped from the plug clamp device. With the function of removing the old plug that discharges the plug, and (b) with the dolly stopped in its original position, set the new plug in the clamp position by the plug clamp device on the plug cradle with the new plug setting device. The new plug is clamped by the clamp device, and by advancing from the original position of the carriage, the new plug clamped by the plug clamp device is attached to the tip of the plug bar in the plug replacement position, and then the new plug is attached. It is provided with a new plug attachment function for releasing the clamp from the clamp device.

[0009]

According to the present invention, there are the following actions. When changing the plug size of the plug diameter and plug length, simply adjust the chuck height position of the plug clamp device according to the plug diameter, and adjust the rear surface setting position of the new plug by the new plug setting device according to the plug length. You can accurately and automatically change plugs of various sizes simply by changing the setup.

Since the long and flexible plug bar is retained at the plug exchange position and the new plug is moved relative to the stationary tip of the plug bar, the new plug and the tip of the plug bar are aligned with each other. Reliable and easy to implement.

Since the old and new plugs are exchanged on the same line, the cycle time can be shortened and the automatic exchange can be performed quickly.

[0012]

1 is a plan view showing an embodiment of the present invention, FIG.
1 is a front view of FIG. 1, and FIG. 3 is a side view of FIG.

The automatic plug changer 10 attaches and detaches the seamless steel pipe producing plug 1 to the tip of the plug bar 2.

The automatic plug changing device 10 includes a plug bar 2
It has a carriage 11 that can be moved toward and away from the original position with respect to the plug exchange position where the tip of the plug is stopped. Dolly 11
Is mounted on a rail 13 provided on the gantry 12, and is reciprocated by a stroke L by a feed cylinder 14.

The automatic plug changing device 10 is arranged on the carriage 11 and can support the lower surface of the old plug 1A, can discharge the old plug 1A in an inclined state, and can also support the lower surface of the new plug 1B. It has a plug receiving base 15. That is, the plug receiving base 15 includes the plug receiving tool 16, is pivotally attached to the pedestal 12 at a fulcrum 17, and can be tilted by a tilting cylinder 18.

The automatic plug changer 10 is arranged on the carriage 11 so that the old plug 1A at the tip of the plug bar 2 can be automatically centered and clamped, and the new plug 1B on the plug holder 15 is automatically adjusted. It has a plug clamp device 22 including a chuck 21 that can be clamped as a core. That is, the chucks 21 are composed of a pair of left and right chucks, each of which is provided with a V-shaped chuck surface, so that the plugs 1A and 1B can be clamped in a self-aligning manner. Each chuck 21 is opened and closed by an opening and closing cylinder 23.

The automatic plug changing device 10 is a new plug 1B.
Is set from the supply position of the plug supply conveyor 24 to the clamping position by the plug clamp device 22 on the plug receiving base 15 of the cart 11 in the original position.
Have five. That is, the new plug setting device 25 includes the pusher head 27 driven by the pusher cylinder 26.
This allows the new plug 1B to be pushed.

At this time, the plug clamp device 22 moves the chuck 21 up and down with respect to the slide guide 32 by adjusting the manual screw 31 to adjust the chuck height position to the plug 1 position.
It can be adjusted according to the plug diameters of A and 1B. This allows
The chuck 21 of the plug clamp device 22 reliably clamps the plugs 1A and 1B of all plug diameters in a self-aligning manner.

Further, the new plug setting device 25 adjusts the forward end position of the pusher head 27 by adjusting the stroke of the pusher cylinder 26, and the plug clamp device 22.
The rear surface setting position of the new plug 1B can be adjusted according to the plug length. As a result, the pusher head 27 of the new plug setting device 25 sets the rear surface of the new plug 1B of any plug length against the plug bar 2 when setting the new plug 1B on the plug receiving base 15 of the cart 11 in the original position. , Set to a position forming the distance L in FIG. Then, under the condition that the feed cylinder 14 advances the carriage 11 from the original position by the constant stroke L, the new plug 1B is securely attached to the plug bar 2.
Attach it to the tip of the.

The plug supply conveyor 24 is intermittently fed by the hydraulic cylinder 41 and the cam clutch 42 to sequentially supply the new plug 1B to the supply position corresponding to the new plug setting device 25.

The plug bar 2 is carried on the plug bar carrying skid 43 and clamped by the bar clamp cylinder 44 at the replacement position.

Therefore, the automatic plug changing device 10 is as follows.
(A) Old plug removal function and (B) New plug installation function.

(A) Old plug removal function The carriage 11 is set from the original position to the forward position, and the plug clamp device 22 is set to the plug exchange position.

The plug bar 2 with the old plug 1A still connected is carried into the plug exchange position and set. At this time, the old plug 1A is unlocked from the plug bar 2. Then, the plug bar 2 is clamped by a bar clamp device 44 for the purpose of centering the plug. The plug bar 2 is clamped by the bar clamp device 44 until the new plug 1B is completely attached to the tip of the plug bar.

The plug clamp device 22 clamps the old plug 1A at the tip of the plug bar 2 at the plug exchange position.

When the carriage 11 is retracted to its original position, the old plug 1A clamped by the plug clamp device 22 is pulled out from the tip of the plug bar 2.

Removing from plug bar 2 Old plug 1
A is unclamped from the plug clamp device 22 and transferred onto the plug receiving base 15.

The plug receiving base 15 is tilted, and the old plug 1A is discharged from the tilted plug receiving base 15 to the discharge chute 45 side.

(B) New plug installation function Under the condition that the dolly 11 is stopped at the original position, the new plug 1B on the plug supply conveyor 24 is replaced by the new plug setting device 25.
Is pushed to the clamp position by the plug clamp device 22 on the plug receiving base 15 and set.

The new plug 1B is clamped by the plug clamp device 22.

The carriage 11 is moved forward from its original position, and the new plug 1B clamped by the plug clamp device 22 is attached to the tip of the plug bar 2 waiting at the plug exchange position.

The clamped new plug 1B is unclamped from the plug clump device 22 so that the plug bar 2 having the new plug 1B can be carried out.

Next, the operation of the automatic plug changing device 10 will be described. When changing the plug size such as the plug diameter and the plug length, the chuck height position of the plug clamp device 22 is adjusted according to the plug diameter, and the new plug 1B is set by the new plug setting device 25.
Plugs 1A, 1B of various sizes can be prepared by simply changing the set position on the rear surface according to the plug length.
Can be accurately and automatically replaced.

Since the elongated and flexible plug bar 2 is retained at the plug exchange position and the new plug 1B is moved relative to the stationary tip of the plug bar 2, the new plug 1B and the tip of the plug bar 2 are moved. Easy and reliable centering with.

Since the old and new plugs 1A and 1B are exchanged on the same line, the cycle time can be shortened and the automatic exchange can be performed quickly.

The present invention was carried out on a piercer mill. Various plugs with a plug diameter of 74 mm to 174 mm and a plug length of 175 mm to 330 mm were replaced.

As a result, the plug replacement time was shortened from 40 seconds / piece in the conventional method by human power to 20 seconds / piece by the present invention.

It has been recognized that the present invention can halve the plug exchange time as compared with the conventional method, and can contribute to the improvement of productivity particularly in high alloy steel rolling which requires a large number of plug exchanges.

[0039]

As described above, according to the present invention, it is possible to easily and accurately automatically replace a plug having a different plug diameter and a different plug length with respect to the plug bar.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a side view of FIG.

[Explanation of symbols]

 1 plug 1A old plug 1B new plug 2 plug bar 10 automatic plug changer 11 dolly 15 plug holder 22 plug clamp device 25 new plug setting device

Claims (1)

[Claims] 1. A bogie, which is capable of moving toward and away from an original position with respect to a plug exchange position where the tip of the plug bar can be stopped, in an automatic plug exchanging device for attaching and detaching a seamless steel pipe manufacturing plug to the tip of the plug bar. A plug pedestal that is disposed on the top and can support the lower surface of the old plug, allows the old plug to be discharged in an inclined state, and supports the lower surface of the new plug; The old plug at the end of the plug bar can be automatically clamped and
It has a plug clamp device equipped with a chuck that can automatically clamp the new plug on the plug cradle, and a new plug setting device that sets the new plug to the clamp position by the plug clamp device on the plug cradle. The plug clamp device can adjust the chuck height position according to the plug diameter, and the new plug setting device can adjust the rear surface setting position of the new plug with respect to the plug clamp device according to the plug length.
(a) Stop the trolley from the original position to the forward position and set the plug clamp device to the plug exchange position, then clamp the old plug at the plug bar tip at the plug exchange position with the plug clamp device and continue the trolley. The old plug clamped by the plug clamp device is pulled out from the tip of the plug bar when the plug is retracted to its original position, the old plug is pulled out from the plug clamp device, and the plug is discharged from the tilted plug receiving base. With the old plug removal function and (b) stopping the dolly in its original position, the new plug is set by the new plug setting device to the clamp position by the plug clamp device on the plug cradle, and the plug clamp device The new plug is clamped by, and the new plug clamped by the plug clamp device is plugged by advancing the carriage from its original position. Attached to the plug bar tip in the changeover position, then said mounting new Plug plugs automatic switching apparatus characterized by comprising a new plug mounting features for releasing the clamp from the plug clamping device.