JPS6049062B2 - Billet feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for feeding billets from a heating furnace to a press in a case where the feeding speed of the billets from the heating furnace is set to be slightly slower than the cycle of a press that moves in a constant cycle.

It is nearly impossible to synchronize the heating furnace (particularly a pinch roll heating furnace) and the press, so the rate at which the billet is delivered from the heating furnace is usually slightly slower than the press cycle; This is to prevent buildup from occurring between the two. In a feeding device attached to a heating furnace that is set at such a speed, the gripping mechanism (mechanism that grips the billet) grips and feeds the billet at the top (closer to the press), and the gripping position gradually changes to the position of the billet. It becomes closer to the rear end (closer to the heating furnace). For this reason, for example, if the difference in speed mentioned above is 1%, 100 will be grabbed empty on the same day, and after the empty grip, 2nd from the beginning.
You can catch the second one. 2 if you grab the second one
I don't like it because it's a book delivery.

This will be explained with reference to FIG. 1 is a heating furnace, 2 is a press receiver, 3 is a billet with a length of 1, 3a is the top, 3b
is the second respective billet, A is the sensing point for the billet, and W is the grasping zone of the grip along the billet length.

The press receiving device 2 transfers the billet sent by the grip described later to the press.The position shown in this figure is the receiving position of the billet, and after a certain period of time set for receiving the billet has passed, it moves to the right in the figure. do. The grip grasps the billet and conveys the billet to the press receiver 2 when the billet passes the detection point A and the press receiver 2 is at the billet receiving position as shown in the figure. As mentioned above, the press receiver 2 is in a constant cycle, independent of the furnace and grip movements. (1) When the grip is closer to the heating furnace than the detection point A (FIG. 1a) The tip of the most advanced billet 3a passes the detection point A and is initially at the position A.

When this fillet is sent out, the tip of the next fillet will be Δ1
The state is delayed, and then the state is delayed by Δ1, and the state becomes the state of "C". At this time, the tip of the billet does not reach the detection point A and no billet position detection signal is output, so the grip does not grip the billet 3'a. At the second, which is the last, the leading billet 3'a is closest to the press side, and the grip catches the second billet 3', resulting in two feeds. Then, from the last second billet to the next last billet, the next time you send two billets, you do not grab them at least once, and repeat this process. (2) Detection point A is closer to the heating furnace (Fig. 1b) At first glance, it seems that there are no two billet feeds, but when the last two billets are ahead of schedule, the billet at the tip is detected. 3″a and second billet 3″b
Two grabs occur.

In either case (1) or (2), two wires may be fed, which is not preferable. In the present invention, in order to prevent the double feed of the billet from occurring in the conventional method, the gripping width of the billet at the gripping end of the gripping mechanism of the feeding device is set in two steps in the billet feeding direction, and the gripping width of the billet is set in two stages in the billet feeding direction. The width of the grip is made smaller than that on the heating furnace side, so that even if two billets are in a row, only the first billet closer to the brace will be gripped.

2 is a front view of the gripping mechanism of the present invention, FIG. 3 is a vertical sectional view, and FIG. 4 is a BB sectional view of the gripping end of FIG. 2.

The grip mechanism 1 includes a pair of levers 6, 7, which are rotatably held in a scissor-like manner on a grip holder 5;
It consists of an arm 8 for closing the gripping end of 7, a motor 9 for rotating it, and a return spring 10. The levers 6, 7 are rotatably supported by the body 5c of the grip holder 5 by their bosses 6a, 7a.

Such a gripping mechanism 1 is mounted on a guide 12 and moves between the heating furnace 1 and the built-in receiver 2 of the brace (FIG. 5). The gripping ends of the levers 6 and 7 are the X zone consisting of 61 and 71 near the heating furnace 1, and 6 on the breath side.

and Y zone consisting of 72 and 72. Therefore, the gripping width B2 of the BILZT 3 in the X zone is larger than the gripping width B2 in the Y zone. FIG. 5 is a side view of the built-in feeding device of the present invention, and FIG. 6 is a plan view thereof. 1 is the heating furnace, 2 is the brace receiver, 3,3'' is the billet, and the work is the grip mechanism.

The grip mechanism S is connected to the cylinder 15 by an arm 16 of its holder 5. The brace pusher 11 is pinned to the bracket 5a of the grip holder 5, and is configured to be able to swing only toward the brace side by means of a limiter 5b. Next, the build feed operation will be explained with reference to FIG.

Z is the calculated reference point, and is
This is the breath side edge of the zone. A is the photocell 14 (2nd, 6th
Place the position detection point of the billet according to the figure) at the end of the x-zone of the gripping end on the brace side. Therefore, the distance S between A and Z is the stroke of the cylinder 15. L is the distance from the reference point Z to the side of the breather of the breather pusher 11, and in order to allow for the delay of the leading billet, the billet length is 1.
Keep it larger.

The first birtz 3 is sent out from the heating furnace 1, and when its tip passes point A, a position detection signal is generated.

On the other hand, when a signal at a predetermined timing of the breath cycle is transmitted and both signals are superimposed, the motor 9 and the arm 8 rotate and operate against the levers 6, 7 and the spring 10, and the gripping end is billeted. Depending on position 7 of 3, grab this in either the x zone or the y zone. In this state, the grip holder 5 slides on the guide 12 by the cylinder 15, moves by the length of its stroke S, and carries the billet from point A to position Z.
On the other hand, the billet 3'' located at the z position on the bed 13 is pushed by the brace pusher 11 and reaches the brace receiver 2. At this position, the billet 3'' is released. cylinder 15
In the return stroke, the grip mechanism returns from point Z to point A.

During this time, the presser 11 rotates, and its tip passes while caressing the upper surface of the remaining billet 3, returning to its original position. The fact that two-line feeding does not occur during such a built-up feeding process will be explained with reference to FIG.

In this figure, the billet delivery speed from the heating furnace is assumed to be 10% slower than the press cycle for ease of explanation. The leading billet 31 in the figure is closest to the breath, and its rear end is at the detection point A.

Therefore, this build 31 is gripped in the Y zone where the gripping width is small. Thereafter, the sending-off was successively delayed by 1/1, and 32 to 38 were similarly grabbed in the Y zone, and 39 to 310 were grabbed in the X zone.

Since the billet 311 is located before the detection point A, the feeding device does not operate, and the billet 31 is pushed to the most advanced state 3''11 by the feeding of the succeeding billet 312 from the heating furnace side.

Then, in the next cycle, it will be caught in the Y zone. 3
The next billet after ``11'' is 3''12.

It is caught by the same Y zone. The above cycle is repeated, and the leading billet is always caught and sent out in either the Y or X zone.

In this manner, according to the present invention, the second billet from the beginning is not grabbed, and therefore, two billets are not fed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the relationship between the tip of the leading billet and the detection point of a conventional billet feeding device, and shows how two-piece feeding occurs, Fig. 2 is a front view of the grip mechanism of the present invention, and Fig. 3 is a vertical cross section. Figure 4 is a BB sectional view of the gripping end in Figure 2, and Figure 5 is
The figure shows a side view 1 of the feeding device, and FIG. 6 is a plan view of the same. Figure 7 shows the relationship between the passing of the detection point of the leading fin and the X and Y zones. ...Brace receiver, 3,3''...Billet, μ...Grip mechanism, 5...Glinop holder, 6,7...
...Luv, 8...Arm, 9...Motor, 10...Spring, 11...Brace push 12...Guide, 15 ...Cylinder, A.
...Edge point, X, Y...Bilt gripping zone, S...Cylinder stroke, Z...Calculation base point.

Claims (1)

[Claims] 1. When the billet delivery speed from the heating furnace is set to be slightly slower than the cycle of the press, which moves in a constant cycle, in the billet feeding device from the heating furnace to the press, the grip at the end of the grip mechanism that grips the billet A billet feeding device with a smaller width on the press side and a larger width on the heating furnace side.