JPH0144448B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a twin-cutting device for metal strip, and in particular, when winding a continuous metal strip, it is possible to efficiently form a winding end end and a start end, thereby reducing the cycle of continuous coil processing. This invention relates to a twin cut device that can reduce time.

Generally, in a continuous coil processing line, a metal strip in a coiled state is continuously taken out and then led to a processing furnace via an inlet accumulator, where it is subjected to a predetermined treatment such as annealing. After this process, the metal strip is passed through the output accumulator and wound again into a coil to form a product. At this time, after the continuous metal strip is continuously wound into a coil, It is necessary to cut the strip in preparation for winding. Also,
The connections in the strip must be removed before winding into a coil.

Conventionally, therefore, a single cut shear is installed upstream of the roll for winding, which cuts the coil at a predetermined section, for example in front of its connection, and then feeds the strip a predetermined length. , and by cutting the rear part of the connection again,
This also served as the task of removing a predetermined coil connection portion before moving on to the next winding operation. If such a method is followed, the stoppage time for winding and, specifically, the stoppage of the strip due to cutting becomes long, so it is necessary to increase the capacity of the accumulator on the output side. Therefore, the cycle time for continuous coil processing has to be long.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a twin cut device that can shorten the cycle time by simultaneously cutting off the front and rear ends of the coil connection portion. That is.

In order to achieve such an object, the present invention provides (1) a fixed first lower blade that extends linearly in the width direction of the metal strip; A first cutting comprising a movable first upper blade corresponding to the first lower blade that linearly cuts the material, and a first driving means that moves the first upper blade in the vertical direction. (2) a fixed second lower blade that forms a V-shape with a pointed center in the direction of travel of the strip; and a second lower blade that cooperates with the second lower blade to cut the strip into a V-shape. A second cutting device including a movable second upper blade corresponding to the second lower blade and a second driving means for vertically moving the second upper blade. The first cutting device is provided on the front side and the second cutting device is provided on the rear side with a predetermined distance apart with respect to the traveling direction of the cutting device, and the cutting operation of each of the first and second cutting devices is performed. Therefore, it is possible to simultaneously form a winding end end and a winding start end on the strip.

Thus, according to the present invention, the cutting portion such as the coil connecting portion is stopped at the middle portion of the twin cut device, and the front and rear portions of the coil connecting portion are simultaneously cut off, thereby cutting off the coil connecting portion. It is possible to significantly shorten the stop time for removing such as, therefore, the capacity of the outlet side accumulator can be made small, and it is also possible to shorten the cycle time of continuous coil processing. It was effective.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the metal strip twin-cut device according to the present invention will be described in more detail below with reference to the drawings.

First, FIG. 1 shows the arrangement of a twin-cut device 2 in a continuous metal strip processing line. In the figure, a metal strip 4 is continuously subjected to treatments such as annealing in a predetermined furnace 6, and then supplied to an output side accumulator 10 via a bridle roll 8 or the like. The strip 4 is further guided from the output side accumulator 10 to the twin cut device 2 via a bridle roll 12, etc., where it is cut as necessary and then wound onto a take-up reel 14 to form a product. It is.

By the way, as shown in FIG. 2, the frame 20 forming the framework of the twin cut device 2 has a ceiling 22, a front floor 24, and a rear floor 26 firmly fixed to left and right wall members 28, 30. The front floor 24 and the rear floor 26 are separated by a predetermined distance. A first lower blade 32 that extends linearly and perpendicularly to the width direction of the metal strip 4 is fixed to the upper rear end surface of the front floor 24. Further, a set of brackets 34 is provided at a position on the ceiling 22 corresponding to the first lower blade 32, and a set of toggle joints 36 are pivotally connected by pins 37, sandwiching each bracket 34 from both sides. A knife holder 38 is pivotally attached to the lower end of the toggle joint 36 by a pin 40.
The left and right ends of the knife holder 38 are fitted into vertical guide grooves 42 and 44 (FIG. 3) provided in the left and right wall members 28 and 38, respectively.
In addition, the front surface of the lower end of the knife holder 38 (Fig. 2)
A first upper blade 46 is fixed at a position corresponding to the first lower blade 322. The pin 48 at the center of each toggle joint 36 is pivoted by a single lever 50, as shown in FIG.
It is pivotally connected to the hydraulic cylinder 54 by. On the other hand, this hydraulic cylinder 54 is pivotally supported by a pin 58 to a bracket 56 fixed to the right wall member 30, so that it can swing freely. Here, the hydraulic cylinder 54, the lever 50 and the toggle joint 36 constitute a first drive means 55, and the knife holder 3
8. A first cutting device 47 is configured by adding the first upper blade 46, the first lower blade 32, and the front floor 24.

Therefore, when the lever 50 moves horizontally due to the expansion and contraction of the hydraulic cylinder 54, the toggle joints 36 and 36 on both sides simultaneously expand and contract downward, and the knife holder 38 is guided by the guide grooves 42 and 44 and is lowered or raised. At this time, the hydraulic cylinder 54
Perform 8 rotations of the head. The metal strip 4 is configured to be cut between the first upper blade 46 and the first lower blade 32.

In FIG. 4, the first lower blade 32 is straight, whereas the first upper blade 46 is formed with an upwardly concave blade surface, so that the metal strip 4 can be cut at once. Instead, cutting is started from both ends and the center is cut last.

On the other hand, as shown in FIG. 2, a second lower blade 62 is fixed to the upper front end surface of the rear floor 26. This second lower blade 62 has a V-shape with a sharp center in the direction of movement of the metal strip 4. Then, the ceiling 2 corresponding to the second lower blade 62
A set of brackets 64 are provided at position 2,
A pair of toggle joints 66 are pivotally mounted on both sides of each bracket 64 by pins 67, and a knife holder 68 is pivotally mounted on the lower end of each toggle joint 66 by a pin 70.
The left and right ends of the knife holder 68 are fitted into vertical guide grooves 72 and 74 (FIG. 3) provided in the left and right wall members 28 and 30, respectively.
Also, the rear surface of the lower end of the knife holder 68 (Fig. 2)
A second upper blade 76 is fixed at a position corresponding to the second lower blade 62.

The pin 78 in the middle of each toggle joint 66 is pivoted by a single lever 80, as shown in FIG. 4, and the lever 80 is further supported by a pin 82 at the right end (FIG. 3). It is pivotally connected to a hydraulic cylinder 84. On the other hand, this hydraulic cylinder 84 is pivotally supported by a pin 88 to a bracket 86 fixed to the right wall member 30, so that it can swing freely.

Here, the hydraulic cylinder 84, the lever 80, and the toggle joint 66 constitute a second driving means 85, and the knife holder 86, the second upper blade 76, the second lower blade 62, and the rear floor 26 are added to form the second driving means 85. A cutting device 77 is constructed.

Therefore, as the hydraulic cylinder 84 expands and contracts, the toggle joint 66 expands and contracts, and as the knife holder 68 moves up and down, the metal strip is cut between the second lower blade 62 and the second upper blade 76. teeth,
This is the same as in the previous case.

In addition, in FIG. 4 (front view), the second lower blade 62 is linear (appears in a mountain shape in the plan view of FIG. 3), whereas the second upper blade 76 is linear. Since the cutting surface is concave upward, the cutting of the metal strip 4 starts from both edges and cuts at the center last, as in the case described above.

Further, as shown in FIG. 2, above the passage of the metal strip 4 in the gap between the front floor 24 and the rear floor 26, the first upper blade 46 and the second upper blade of the metal strip 4 are passed through. In order to avoid contact with the knife holder 76, the plate presser roll 90 is attached to the knife holder 6.
It is rotatably supported by an arm member 92 protruding from 8. Further, below the strip passageway, an intermediate floor 94 pivotably supported by the rear floor 26 is provided so as to be openable and closable by a hydraulic cylinder 96, and after removing cutting waste, this intermediate floor 94 is raised to pass the next metal strip 4. It is designed so that the tip of the metal strip 4 can easily pass between the first lower blade 24 and the first upper blade 46 by guiding the tip and pressing it from above with a plate press roll 90. .

In the twin cut device with such a configuration,
After continuously winding the metal strip 4, when cutting the strip 4 in preparation for the next winding, the connection part of the strip 4 to be cut is located midway between the front floor 24 and the rear floor 26. When it reaches this point, the movement of the strip 4 is stopped. Meanwhile, the strip 4 passing through the processing furnace 6 is stored in the output side accumulator 10. In this state, if the hydraulic cylinders 54 and 84 are simultaneously extended and the toggle joints 36 and 66 are simultaneously operated downward, the first upper blade 46 and the second lower blade 76 fixed to the knife holders 38 and 68, respectively, are opened. The metal strip 4 is simultaneously lowered and cut between the first lower blade 32 and the second lower blade 62 at the same time. In FIG. 5, the winding end end 101 on the left side is a straight line, the winding start end 102 on the right side is in a chevron shape, and the cut piece 100 including the connecting part 98 cut in the middle is cut out as a scrap with an inclined intermediate floor 94. They slip on the top and are expelled to the outside.

After the front winding end end 101 has been wound up and removed, in order to guide the winding start end 102 at the leading end of the following strip 4 to the winder, first actuate the hydraulic cylinder 96 to remove the winding end 102 from the intermediate floor. 9
4 so that its left end is aligned with the upper surface of the first lower blade 32, the subsequent strip 4
is guided to the intermediate floor 94 and moved to the left,
With the help of the plate press roll 90 from above, it passes between the first upper blade 46 and the first lower blade 32 and is easily guided to the winder.

Thus, this twin-cutting device simultaneously cuts off the front and rear ends of the connecting portion of the metal strip 4 to remove the connecting portion 98, and forms the chevron-shaped winding start end 102 for the next winding. This eliminates the conventional process of cutting the coil once, then cutting it out to a predetermined length and then cutting it again at the rear of the connection, making it possible to shorten the cycle time of continuous coil processing. . Also, therefore, the output side accumulator 110
This also has the effect of reducing capacity and equipment costs.

In addition, in the above-mentioned embodiment, both the first upper blade 46 and the second upper blade 76 have a concave shape at the top in FIG. 7 in order to disperse the cutting force. The invention is not necessarily limited to this, and the blade shape may be convex at the bottom. Further, in this embodiment, the connection portion 98 is cut at the front and back, but it goes without saying that the connection portion 98 may be cut at two places, the front and the back.

In addition, various modifications and improvements can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a layout diagram of an embodiment of the twin cut device according to the present invention in a continuous coil processing line, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a partially sectional plan view, and FIG. 3 is a sectional view taken from FIG. 3, and FIG. 5 is a partial plan view showing the cutting state of the metal strip 4 before and after the connecting portion 98. 2: Twin cut device, 4: Metal strip,
32: first lower blade, 46: first upper blade, 47: first cutting device, 55: first drive device, 62: second lower blade, 76: second upper blade, 77: Second cutting device, 85: Second drive device, 101: Winding end end, 102: Winding start end.

Claims (1)

[Scope of Claims] 1. A device for continuously winding a continuous metal strip and then cutting the strip in preparation for the next winding, the device comprising a fixed number extending linearly in the width direction of the strip. a movable first upper blade corresponding to the first lower blade that cooperates with the first lower blade to linearly cut the strip; a first cutting device including a first driving means for moving the blade in the vertical direction; a fixed second lower blade having a V-shape with a sharp center in the direction of travel of the strip; a movable second upper blade corresponding to the second lower blade which cooperates with the second lower blade to cut the strip in a V-shape; and a second movable upper blade which moves the second upper blade in the vertical direction. a second cutting device including two driving means, the first cutting device being on the front side and the second cutting device being on the rear side with respect to the traveling direction of the strip;
A winding end end and a winding start end can be simultaneously formed in the strip by the respective cutting operations of the first and second cutting devices. A twin-cut device for metal strips.