JPH0314569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cropping and cobbling processing apparatus for rolled material, which is disposed downstream of a flying shear in rolling steel.

(Prior Art) In a long steel rolling line, flying shears are installed at appropriate locations between various rolling mill rows. This flying shear can be used to cut traveling rolled materials to a predetermined length, cut the leading and trailing ends, or cut sample materials of a predetermined length. The material is cut to a predetermined length and discharged outside the line. It is installed to perform so-called cobbling.

A guide flap device is provided on the downstream side of the flying shear (hereinafter, the front side in the running direction of the rolled material will be referred to as the downstream side).

This guide flap device includes a guide flap that is rotatably supported on a support shaft having an axis parallel to the pass line on the side of the pass line of the rolled material, and a guide flap that is connected to the rolled material traveling on the pass line from below. It is comprised of a horizontal position in which it is supported, and a drive device that changes the position from the horizontal position to a vertical position rotated downward.

This guide flap device supports the rolled material from below so that when the leading edge of the rolled material passes through after being cut by a flying shear, it does not sag downward due to its own weight, and the leading edge of the rolled material is stabilized. The guide flap is held in a horizontal position so that it can be rolled downstream, and the guide flap is held in a vertical position in order to allow the cropped material (or sample material or cobbled material to fall under its own weight from the pass line during cropping or cobbling processing). It is something to do.

The front and rear end cropped materials are short lengths of 500 mm or less, but the cobble materials are long lengths of about 1000 to 3000 mm, so the guide flaps must be considerably long to match the length of the long cobble materials. It was said that

(Problem to be Solved by the Invention) By the way, in the guide flap device, if you want to stop the cobble midway and allow the subsequent material to travel downstream as a product, or if you want to use a long sample (tip), the cobble The flap must be repositioned from a vertical position to a horizontal position within a short time after the material or sample material is dropped into the chute and at the same time until the leading edge of the following material reaches the guide flap.

However, the conventional type had a long guide flap, was heavy, and required a large inertial force for movement, so it lacked high-speed followability.

Furthermore, when processing short crop materials, it is wasteful to rotate the long guide flap.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cropping and cobbling processing apparatus for rolled material that can efficiently perform both cropping of short lengths and cobbling of long lengths.

(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures. That is, the feature of the present invention is that the rolling material pass line on the downstream side of the flying shear is rotatably supported on a support shaft having an axis parallel to the pass line, and first and second guide flaps whose positions can be changed freely between a horizontal position in which they support the upper traveling rolled material from below and a release position in which they rotate downward from the horizontal position to release support for the rolled material; comprising a drive device that rotates the first and second guide flaps in the vertical direction, a crop chute disposed below the first guide flap, and a cobble chute disposed below the second guide flap, The first guide flap is disposed upstream of the second guide flap, and the length of the first guide flap along the pass line direction is equal to the second guide flap.
It is at a point shorter than the length of the guide flap in the same direction.

(Function) According to the present invention, during normal rolling, when the tip of the rolled material passes through the flying shear, the first and second guide flaps maintain a horizontal attitude, and the tip of the rolled material traveling on the pass line. The tip moves downstream without hanging down while being guided by the first and second guide flaps.

During normal rolling, after the leading edge of the rolled material has passed and is bitten by the stand on the downstream side, the first and second guide flaps rotate downward to the release position and prevent contact with the rolled material. Avoid this to prevent scratches on the material.

During normal rolling, when the rear end of the rolled material passes, the first and second guide flaps rotate upward to take a horizontal position, thereby preventing the trailing end of the rolled material from sagging.

When cutting the tip crop material, the first guide flap is placed in a released position and the second guide flap is held in a horizontal position. The cut tip crop falls under its own weight without being supported by the first guide flap, and is recovered via the crop chute below. The first guide flap is immediately held in a horizontal position, and the leading edge of the subsequent rolled material is supported by the first and second guide flaps and guided to the downstream stand.

In the case of rear end crop cutting, after the rear end of the rolled material has passed, the first guide flap rotates downward to the release position, and the rear end crop material is not supported by the first guide flap and is placed on the lower crop chute. It falls and is collected.

When collecting a long tip sample, the first and second guide flaps are held in the released position. The sample material falls unsupported by the first and second guide flaps and is collected via the lower cobble chute. Before the subsequent rolled material arrives, the first and second guide flaps are held in a horizontal position and support the leading edge of the subsequent rolled material.

In the case of cobble processing, the first and second guide flaps are held in the released position, and the cobble material falls under its own weight and is collected via the cobble chute.

When cobbling is stopped midway and the succeeding material is flowed downstream as a product, the tip of the succeeding material is the first and second material.
Before reaching the guide flaps, return each guide flap to a horizontal position. That is, the second guide flap can be rotated at a lower speed than the first guide flap.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 3 to 5, 1 is a No. 1 flying shear placed between the stands, an entry guide device 2 is provided on the upstream side of the flying shear 1, and a crop and cobble processing device 3 is provided on the downstream side. is provided.

The flying shear 1 has a pair of upper and lower rotary cutters 4, 4, which cut a rolled material running on a pass line 5.

As shown in FIGS. 6 and 7, the entrance guide device 2 has a pair of left and right vertical rollers 6 and a horizontal roller 7, and guides the rolled material from the upstream side up and down and left and right to stably fly shear. 1.

The crop and cobble processing device 3 mainly includes a guide flap device 8, a balance roller device 9, a chute device 10, and the like.

The guide flap device 8 has a first guide flap 11 and a second guide flap 12 on its upstream and downstream sides via a balance roller device 9. As shown in FIG. 8, both guide flaps 11 and 12 are rotatably supported on a support shaft 13 having an axis parallel to and on the side of the pass line 5. The guide flaps 11 and 12 can be freely changed in position into a horizontal position in which they support the rolling material running on the pass line 5 from below, a vertical position in which they are rotated downward from the horizontal position, and an inclined position between the horizontal and vertical positions. It is. These vertical and inclined postures are collectively called the released posture.

This three-position change of the guide flaps 11, 12 is effected by a drive device 14 which is independently attached to each flap 11, 12. This drive device 14
consists of an air cylinder 15.

As shown in FIG. 11, the air cylinder 15
The cylinder tube 16 has upper and lower piston chambers 17, 18, and each piston chamber 17, 18 has a piston 19, 20 and a piston rod 21, 2.
2 has been inserted. The piston 20 and rod 22 fitted in the lower piston chamber 18 move in a single-acting manner, and the upper side of the piston chamber 18 is open to the atmosphere. This lower piston rod 22 regulates the bottom dead center of the upper piston 19.

Piston 1 fitted into upper piston chamber 17
9 and the piston rod 21 move in a double-acting manner, and the piston rod 21 is pivotally connected to the guide flaps 11, 12.

Thus, the guide flaps 11, 12 are in a vertical position when the upper piston 19 is at the top dead center, and are in a horizontal position when the upper piston 19 is at the bottom dead center. Then, when the lower piston 20 is at the top dead center and the upper piston 19 is at the lowered position, the tilted posture is obtained.

The balance roller device 9 includes a balance roller 23 provided between both guide flaps 11 and 12.
has. As shown in FIG. 9, this balance roller 23 is movable up and down by an air cylinder 24, and supports the running rolled material on the pass line 5 from below so as to be able to approach and separate from it.

The chute device 10 includes both guide flaps 11,
12 and a crop chute 26 located below the guide flap 11 on the upstream side. Cobble shoot 25
An opening 27 is provided on the upstream side of the opening 2.
A crop shoot 26 is disposed below 7. As shown in FIG. 10, the opening 27 is
It is closed by a cobble flap 28 so that it can be opened and closed, and the cobble flap 28 rotates to open and close the opening 27 as the air cylinder 29 expands and contracts.

A cobble bag 30 is installed below the inclined side of the cobble chute 25, and a crop bag 31 is placed below the inclined side of the crop chute 26.

Next, the operation of the flying shear will be explained.

(i) In normal rolling, when the tip of the rolled material passes through the flying shear (rolling mode).

The cutter 4 of the flying shear 1 is stopped at the retracted position. The guide flaps 11, 12 maintain a horizontal position, and the balance roller 23 is in a raised position.

The leading end of the rolled material traveling on the pass line 5 is guided by the guide flaps 11 and 12, moves downstream without hanging down, and is stably bitten by the stand on the downstream side.

(ii) In normal rolling, when the tip of the rolled material has finished passing (rolling mode).

When the tip of the rolled material passes and is bitten by the downstream stand, both guide flaps 11 and 12 assume a vertical position, avoiding contact with the rolled material. The balance roller 23 maintains the raised position and supports the loop of rolled material. Guide flap 11,1
2 By retracting downward, the rolled material and guide flap 1
Since the sliding of points 1 and 12 is avoided, scratches on the material can be prevented.

(iii) Normal rolling when the rear end of the rolled material passes (rolling mode).

Before the rear end of the rolled material passes through the flying shear 1, both guide flaps 11 and 12
is changed from a vertical position to an inclined position, and when the rear end thereof passes the flying shear 1, the guide flaps 11 and 12 are brought into a horizontal position.
Therefore, the rear end of the rolled material is connected to the guide flap 1.
It is supported by 1 and 12 and passes stably without sagging.

(iv) For tip cropping (rolled iodine).

The first guide flap 11 is held in an inclined position, and the second guide flap 12 is held in a horizontal position. The cobble flap 28 is rotated downward and the opening 27 is opened. The cutters 4, 4 of the flying shear 1 start rotating in response to a predetermined activation command, and cut the tip of the traveling rolled material to a length of about 500 mm or less. The cut end crop falls under its own weight without being supported by the upstream guide flap 11, passes through the opening 27, falls onto the crop chute 26, and is collected in the crop bag 31. After that, the first guide flap 11
is held in a horizontal position, and the tip of the rolled material after cutting is guided by guide flaps 11 and 12 in a horizontal position and led to a downstream stand.

(v) For trailing crop cutting (rolling mode).

In this case, in addition to the rolling mode, the flying shear 1 cuts the rear end of the rolled material into a length of about 500 mm or less in response to a predetermined activation command. At this time, the cobble flap 28 rotates downward to open the opening 27. The rest is the same as the rolling mode.

(vi) When collecting a long tip sample (rolling mode).

As shown in FIG. 1, both guide flaps 11,
12 is held at an angle of about 10° to 45° with respect to the horizontal line. The balance roller 23 is retracted in the lowered position. The cutters 4, 4 of the flying shear 1 start rotating in response to a predetermined starting command, and cut the tip of the traveling rolled material 32 to a predetermined length. The cut tip sample material 33 rests on the guide flaps 11 and 12, but since the flaps 11 and 12 are inclined, the sample material 33
rolls down from the guide flaps 11 and 12,
It is collected into a cobble bag 30 via a lower cobble chute 25.

On the other hand, the rolled material 32 after cutting is the sample material 3
3, the guide flap 11 must be held in a horizontal position when the leading end of the rolled material 32 reaches the guide flap 11. The time required for the guide flap 11 to change its position from an inclined position to a horizontal position is as follows:
Flying shear 1 center to guide flap 1
1 Distance to the rear end l _d (m), speed of the rolled material V
(m/sec), a maximum of t _d =l _d /V seconds is required. By changing the position of the first guide flap 11 from the inclined position to the horizontal position within this time, the sample material 33 is transferred to the guide flap 1.
Rolling and falling from 1 and 12, the subsequent rolled material 3
2 is stably guided on guide flaps 11 and 12.

As mentioned above, the first guide flap 11 has a maximum
It takes t _d seconds to change the position from the inclined position to the horizontal position, and the second guide flap takes a longer time to change the position to the horizontal position, so compared to changing the position from the vertical position to the horizontal position, and The moving speed is slower than when the first and second guide flaps are integrated. Also,
Since the inertial force of the guide flaps 11 and 12 is also reduced, the striking force for pushing out the sample material 33 is reduced, and it is possible to prevent the sample material 33 from jumping up significantly.

In this way, since the acceleration force and speed of the guide flaps 11 and 12 can be made relatively small,
The drive device 14 can also be realized by an air cylinder 15.

If the sample material 33 becomes long, if the guide flaps 11 and 12 are kept in a tilted position before cutting, the tip of the sample material 32 before cutting will slide down the guide flaps 11 and 12 in the tilted position. During cutting, the flying shear 1 bends or shifts at the cutting point.

However, since the entrance guide device 2 is provided with a pair of vertical rollers 6, 6 on the left and right and front and back,
The tip of the rolled material 32 is prevented from slipping off.

(vii) When you want to stop cobbling midway and let the subsequent material run downstream as a product (rolling mode).

Cobble wood is cut into relatively long lengths of approximately 1000 to 3000 mm. During this cobbling, the guide flaps 11, 12 are held in an inclined position. The cut cobble material is Cobble Shoot 25
It falls upward and is stored in the cobble bag 30.
When cobbling is stopped, the rolling mode is switched to the first guide flap 1 for a maximum of t _d seconds.
1 changes its position from a tilted position to a horizontal position, and the second
The guide flap 12 returns to the horizontal position after a short delay, and the subsequent rolled material is stably moved downstream as a product.

FIG. 2 shows a startup timing float chart of the guide flaps 11 and 12. To give an overview, the flaps are at the inclined position (i.e., the upper cylinder is at the retracting end and the lower cylinder is at the pushing end). , Suppose Siya's blade is at HP (stationary). The activation of the shear is timed so that the rolled material is cut to a predetermined length by the HMD located upstream, although it is not shown in this figure. Since we know that it takes t _d (sec) for the tip of the material to reach the flap after cutting,
Cut point (HP is top dead center in this figure, so θ=
(equivalent to 180°) position is detected by PLG, and θ
Since the crop or sample material has been completely cut when the angle reaches = 180°, a command can be issued to the solenoid valve to move the flap from the inclined position to the horizontal position. However, in order to take into consideration (practical adjustment) the delay in flap and cylinder operation, θ=
If the electrical command is issued at the point of 180° - θε, that is, before the cutting is completed, the flap can be operated more quickly.

Incidentally, what is shown in FIG. 12 is an explanatory diagram in which the holding of the preceding material 34 and the tip sample cutting of the succeeding material 35 are carried out continuously.

The above explanation is based on the pair of front and rear guide flaps 1.
1 and 12 are operated individually, but the same operation may be performed at the same time.

It should be noted that the present invention is not limited to the above embodiment, and for example, an electric motor or the like may be used instead of the air cylinder 15 as the drive device 14 for the guide flaps 11 and 12.

(Effects of the Invention) According to the present invention, the guide flap is divided into the first flap on the upstream side and the second flap on the downstream side.
Since the moving speed of the guide flap can be made low, the striking force for pushing out the sample material etc. can be reduced, and it is possible to prevent the sample material etc. from jumping up significantly.

Furthermore, since the guide flaps are divided, the movement performance of each guide flap is improved, high-speed followability is achieved, and long and short objects can be processed efficiently.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the operation of the guide flap when collecting sample materials, Fig. 2 is a start timing float chart of the guide flap operation, Fig. 3 is a plan view of the flying shear, Fig. 4 is a front view of the same, Fig. 5 6 is a sectional view taken along line A-A in FIG. 3, FIG. 7 is a sectional view taken along line BB in FIG. 4, and FIG. 8 is a sectional view taken along line D-D in FIG. 4. , Figure 9 shows E in Figure 4.
-E cross-sectional view, Figure 10 is a cross-sectional view taken along line C-C in Figure 4, Figure 11 is a cross-sectional view of the air cylinder, and Figure 12 is an explanation of the operation of the guide flap when sequentially processing preceding and trailing materials. It is a diagram. 1...Flying shear, 5...Pass line,
8... Guide flap device, 11... First guide flap, 12... Second guide flap, 13...
... Support shaft, 14 ... Drive device.

Claims (1)

[Scope of Claims] 1. A rolling material which is rotatably supported on a support shaft having an axis parallel to the pass line on the side of the rolled material pass line on the downstream side of the flying shear, and which is mounted on the rolling material pass line on the pass line. first and second guide flaps whose positions can be changed freely between a horizontal position in which they support the rolled material from below and a release position in which they rotate downward from the horizontal position to release support for the rolled material; a driving device that rotates each of the second guide flaps in the vertical direction; a crop chute disposed below the first guide flap; and a cobble shoot disposed below the second guide flap; is arranged upstream of the second guide flap, and the length of the first guide flap along the pass line direction is longer than the second guide flap.
A cropping and cobbling processing device for rolled material, characterized in that the length of the guide flap in the same direction is shorter than the length of the guide flap in the same direction.