JP2006110684A - Flying shear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve various problems of the prior art by preventing rear end material from being bitten or caught on in a flying shear. <P>SOLUTION: This flying shear includes: a guide means 10 supporting and guiding a material W to be cut on the introduction side with respect to a pair of upper and lower shear blades 2, 3 relatively rotated, wherein the guide means 10 is provided with an end material holding means 17 for pressing the rear end material E generated in the last from above to prevent it from being declined forward in sequentially cutting the material W to be cut with upper and lower shear blades 2, 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flying shear.

In a rolling process of steel strip or the like, a flying shear is generally provided in order to perform cutting processing of a front end or rear end, sample collection, etc. as well as a regular cut.
As schematically shown in FIG. 6, this flying shear 100 is provided with upper and lower horizontal shafts 101 and 102 having axial axes parallel to each other so that a pair of upper and lower shear blades 103 and 104 can rotate relative to each other. Thus, the upper and lower shear blades 103 and 104 are in a relationship of meshing with each other at an intermediate position facing each other by rotating.
A shearing force is applied to a rolled material W (hereinafter referred to as “material to be cut”) such as a bar steel and a die steel between the shear blades 103 and 104 and cut (for example, see Patent Document 1).

In manufacturing a wire or bar product of a predetermined length, when the material to be cut W is sequentially cut from the leading end side by the flying shear 100, the end portion (final part) of the material to be cut is the product. It becomes a short end material (cut end material) that cannot be made. This end material E (hereinafter referred to as “rear end material”) is received by the chute 105 installed below the upper and lower shear blades 103 and 104 and dropped into the recovery bag 106. Yes.
The chute 105 has openings 106 and 107 formed on both sides of the introduction side and the carry-out side when the upper and lower shear blades 103 and 104 rotate, and even if the rear end material E falls from the introduction side, the delivery side Even if it falls from the top, it can handle (receive) any of them.
JP-A-62-39109

The rear end material E varies in the position of the center of gravity which is influenced by the length and the tail end shape. Therefore, the timing at which the rear end material E starts to drop from the guide means 108 such as a roller conveyor provided on the introduction side of the upper and lower shear blades 103 and 104 is the timing at which the upper and lower shear blades 103 and 104 rotate (rotation angle). On the other hand, it is not always the same.
Therefore, as shown in FIG. 7A, the rear end material E is bitten between the upper shear blade 103 or its holder 110 and the lower shear blade 104 or its holder 111, or in FIG. 7B. As shown in the drawing, the rear end material E sometimes gets caught between the lower shear blade 104 or its holder 111 and the chute 105 in rare cases.

When these phenomena occur, the operation of the flying shear 100 must be interrupted to remove the trailing end material E. In addition to reducing the operating efficiency of the flying shear 100, the entire rolling process may be operated depending on the case. There was also a risk of adverse effects. Further, there is a risk of causing damage to the upper and lower shear blades 103, 104 and the chute 105.
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a flying shear that can prevent the rear end material from being caught and caught and can solve various conventional problems. And

In order to achieve the above object, the present invention has taken the following measures.
That is, the flying shear according to the present invention is provided with a pair of upper and lower shear blades that are provided so as to be relatively rotatable about upper and lower horizontal axes with parallel axes, and mesh with each other at the opposite intermediate positions when both horizontal axes rotate. And a guide means for guiding the material to be cut to the upper and lower shear blades. The guide means includes a rear end material that is generated at the end when the material to be cut is sequentially cut by the upper and lower shear blades. An end material holding means is provided to prevent the rear end material from being guided to the upper and lower shear blades in a forward-lowered state by pressing down from above.

  For this reason, even after the rear end material is cut off from the material to be cut, such as a strip steel wire, a shape steel wire, and a bar, the rear end material does not fall forward. It does not fall on the introduction side of the cutting position by the upper and lower shear blades until it passes through the cutting position where the shear blade meshes (not the actual meshing state but the position where the meshing occurs). That is, all the rear end materials pass through the cutting position by the upper and lower shear blades and fall on the carry-out side. Therefore, the above-described rear end member is prevented from being caught or caught on the introduction side, and various conventional problems are solved.

Preferably, the end material holding means has a pressing roll which is provided on the downstream side of the guiding means and can move up and down.
Thus, the end material holding means can be easily configured simply by providing a pressing roll on the downstream side of the guiding means.
More preferably, the pressing roll is an idle roll or a driving roll.
By doing so, the material to be cut (including the rear end material) can be smoothly and stably introduced between the upper and lower shear blades.

The guide means may include a plurality of guide rolls for supporting and guiding the material to be cut from below on the downstream side of the guide means, and the guide rolls may be idle rolls or drive rolls.
As a result, the material to be cut and the rear end material can be stably discharged from the guiding means and sent to the upper and lower shear blades.
The pressing roll is disposed at a position facing one of the plurality of guide rolls in the vertical direction, and at least one other guide roll is provided downstream of the guide roll facing the pressing roll. It is good to be arranged.

According to this, at the stage where the rear end portion of the rear end material is finally sandwiched between the holding roll and the guide roll, the guide roll that supports the lower surface of the rear end material acts like a fulcrum of the insulator. While playing and receiving the action of the pressing roll pressing down the rear side, the rear end material is in such a posture as to rise rather forward. For this reason, the action of the rear end member not being in the forwardly lowered posture until passing through the cutting position by the upper and lower shear blades is further ensured.
Moreover, although a guide roll and a pressing roll are good also as a free roll, they can be made into a drive roll, respectively.

  With such a configuration, it is possible to perform speed control that increases the conveyance speed applied to the rear end material as compared with the conveyance speed of the material to be cut. For this reason, this method further ensures the effect that the rear end material does not fall forward until it passes the cutting position by the upper and lower shear blades.

  Since the flying shear according to the present invention can prevent the rear end material from being caught and caught, it can solve various conventional problems.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of a flying shear 1 according to the present invention. This flying shear 1 can be used for various cutting processes such as fixed length cutting, cropping, sampling, etc. of rolled material by incorporating it into a rolling process of wire rods and steel bars, rods, etc. Used. The flying shear 1 has a pair of upper and lower shear blades 2 and 3 at a core portion in performing the above cutting process.
The upper shear blade 2 is attached to the upper horizontal shaft 4 via a holder 5 and is driven to rotate around the upper horizontal shaft 4. The lower shear blade 3 is attached to a lower horizontal shaft 6 provided on the lower side of the upper horizontal shaft 4 via a holder 7, and is driven to rotate around the lower horizontal shaft 6 as an axis. It has become. The upper horizontal axis 4 and the lower horizontal axis 6 are parallel to each other.

  Further, the upper horizontal shaft 4 and the lower horizontal shaft 6 are driven and rotated in the direction of relative reverse rotation, and at this time, the rotation ratios of the both are made the same. The rotation timing of the upper shear blade 2 and the lower shear blade 3 attached to the upper horizontal shaft 4 and the lower horizontal shaft 6 is such that the upper shear blade 2 faces directly downward and the lower shear blade 3 faces upward. That is, the shear blades 2 and 3 are set to be in a meshing relationship with each other at an opposite intermediate position, and this position is a cutting position. If the rotational radii of the upper shear blade 2 and the lower shear blade 3 are the same, this cutting position corresponds to the midpoint of the distance between the axial centers of the upper horizontal shaft 4 and the lower horizontal shaft 6.

  In the illustrated example (see FIG. 1), the workpiece W is conveyed from the right side to the left side, and the right side of the drawing is referred to as the upstream side. The left side of the figure is called the downstream side. Therefore, the material W to be cut is conveyed from the upstream side to the downstream side, and is cut by the upper and lower shear blades 2 and 3 arranged on the downstream side of the guiding means 10 described later. Since the upper shear blade 2 rotates in the clockwise direction and the lower shear blade 3 rotates in the counterclockwise direction, the upstream side (right side) of the cutting position by both shear blades 2 and 3 is the material to be cut. W is the introduction side, and the downstream side (left side) is the discharge side.

In the following description, the upper side of FIG. 1 is referred to as the upper side in this description, and the lower side of FIG. 1 is referred to as the lower side.
The guide means 10 guides the workpiece W to the upper and lower shear blades 2 and 3, and includes a guide table 12 in which a plurality of large rolls 11 are held at predetermined intervals, and this guide It has a plurality of small-diameter guide rolls 13 held at intervals packed together at the front end side (downstream side) of the table 12.
As shown in FIG. 4, the guide rolls 13 held on the leading end side (downstream side) of the guide table 12 are each supported in a cantilever manner via a gear train 15, and the gear train 15 includes a drive motor. 16 is connected so that power transmission is possible. Therefore, all the guide rolls 13 are drive rolls.

The gear train 15 is in an interlocking relationship in which an odd number of gears mesh between adjacent guide rolls 13 so that all the guide rolls 13 rotate in the same direction, and all the guide rolls 13 have the same rotational speed. The number of teeth of each gear and the pitch circle diameter are set to a predetermined value so that the gear rotates. In the illustrated example, the roll 11 having the large diameter, which is positioned at the earliest position in the guide table 12, is driven and rotated by being driven by the gear train 15.
For these reasons, the guide means 10 can convey and drive the material to be cut W and feed it to the cutting position by the upper and lower shear blades 2 and 3 at a predetermined speed. When the trailing portion is cut and the rear end material E is generated by this, the rear end material E can also be imparted with a conveyance drive by the guide roll 13. Therefore, the rear end material E is subjected to an inertial action such that the rear end material E passes through the cutting position by the upper and lower shear blades 2 and 3 and is thrown out to the carry-out side.

The guide means 10 is provided with end material holding means 17. The end material holding means 17 has a pressing roll 18 positioned at a height at which it can come into contact with the upper surface of the material to be cut W conveyed on the guiding means 10. The pressing roll 18 is positioned close to the cutting position by the upper and lower shear blades 2 and 3. The pressing roll 18 is a free roll having no drive system.
The positional relationship between the holding roll 18 of the end material holding means 17 and the cutting position by the upper and lower shear blades 2 and 3 (the degree of “adjacent” described above) is the rear end material E generated by being cut from the material to be cut W. It is set as a guideline that the pressing roll 18 of the end material holding means 17 keeps in contact with the upper surface of the rear end material E until the front end portion of the end material substantially reaches the cutting position by the upper and lower shear blades 2 and 3. ing.

In other words, the pressing roll 18 is arranged at a position facing one of the plurality of guide rolls 13 in the vertical direction, and at least one or more is provided on the downstream side of the guiding roll 13 facing the pressing roll 18. The guide roll 13 is disposed.
In the illustrated example, among the guide rolls 13 included in the guiding means 10, rearward (closer to the second guide roll 13) than the earliest guide roll 13 provided closest to the cutting position by the upper and lower shear blades 2, 3. It is assumed that the pressing roll 18 of the end material holding means 17 is positioned above the position). That is, the foremost guide roll 13 in the guiding means 10 is arranged closer to the cutting position by the upper and lower shear blades 2 and 3.

The pressing roll 18 of the end material holding means 17 is supported in a laterally projecting manner at the tip of the arm with respect to a swing arm 20 that is swingable up and down around a swing shaft 19. Accordingly, as the swing arm 20 swings up and down, the pressing roll 18 of the end material holding means 17 moves up and down so that the outer peripheral surface thereof approaches and separates from the small diameter guide roll 13 of the guide means 10. . The swing arm 20 is in a state in which a midway portion in the longitudinal direction of the arm is pressed and biased by a damper portion 24 including a biasing means 23 such as a coil spring.
2 and 3, the swing shaft 19 is provided with a stopper arm 25 that rotates integrally with the swing shaft 19 while projecting radially outward at a predetermined angle. A stopper 26 that stops the stopper arm 25 is provided at a predetermined position above the swing shaft 19. Accordingly, the position where the stopper arm 25 abuts against the stopper 26 is the lower swing limit of the swing arm 20, and the press roll 18 does not descend beyond this state. In other words, this prevents the pressing roll 18 from coming into contact with the small diameter guide roll 13 of the guiding means 10.

Further, a lever 27 is attached to the swing shaft 19 so as to rotate integrally therewith. A pusher 29 that is driven back and forth by an actuator 28 such as a fluid pressure cylinder is opposed to the lever 27. When the actuator 28 extends the pusher 29, the lever 27 is forcibly lifted and swung. It has come to be. Thereby, the press roll 18 of the end material holding means 17 can be raised and made to stand by as needed during maintenance.
For this reason, when the material to be cut W is conveyed on the guiding means 10, the pressing roll 18 of the end material holding means 17 comes into contact with the upper surface of the material to be cut W, and this contact The state is stabilized so as not to cause rattling such as splashing due to the influence of the traveling vibration of the material to be cut W, the top surface property, and the like. Further, since the pressing roll 18 is a free roll as described above, it is rotated along with the conveyance of the material to be cut W when contacting the material W to be cut. That is, it rotates in synchronization with the conveying speed of the material W to be cut.

The flying shear 1 having such a configuration operates as follows.
When the material to be cut W is sent onto the guide table 12 of the guiding means 10, the material to be cut W is fed by the roll 11 provided on the guide table 12 and the guide roll 13 of the guiding means 10, It is fed into the cutting position by the upper and lower shear blades 2 and 3. At this time, the pressing roll 18 of the end material holding means 17 rides on the workpiece W. Since the pressing roll 18 receives a downward biasing action by the damper portion 24 via the swing arm 20, the conveyance speed of the workpiece W is maintained while maintaining a state in contact with the upper surface of the workpiece W. Rotate freely in sync with

Needless to say, at this time, the upper and lower shear blades 2 and 3 are not rotating, and are stopped at a position retracted from the cutting position by them.
In the material to be cut W, when the position at which the rear end material E of the rear end portion is to be cut reaches the cutting position by the upper and lower shear blades 2 and 3, the upper and lower shear blades 2 and 3 rotate accordingly, and the cutting is performed. Cutting is performed at the position. Even if the rear end material E is generated by this cutting, the upper surface of the rear end material E is in a state of being pressed by the pressing roll 18 of the end material holding means 17 as shown in FIG.

Therefore, the rear end material E is sandwiched between the guide roll 13 of the guide means 10 and the pressing roll 18 of the end material holding means 17. Even in this state, the rear end material E continues to be transported and driven by the guide roll 13 of the guiding means 10 and receives an inertial action such that the rear end material E passes through the cutting position by the upper and lower shear blades 2 and 3 and is thrown out to the carry-out side. . Further, since the upper surface of the rear end material E continues to be pressed by the pressing roll 18 of the end material holding means 17, the rear end material E does not take a forwardly lowered posture.
Moreover, since the foremost guide roll 13 in the guiding means 10 is closer to the cutting position by the upper and lower shear blades 2 and 3 than the pressing roll 18 of the end material holding means 17, While the guide roll 13 of the guiding means 10 supporting the lower surface acts as a fulcrum of the lever, it receives the action of the pressing roll 18 of the end material holding means 17 that pushes the rear side from it, while the rear end material E Is a posture that tends to rise.

For these reasons, the rear end material E does not assume a forward-lowering posture until it passes through the cutting position by the upper and lower shear blades 2 and 3, and the situation where the rear end material E falls on the carry-out side without falling on the introduction side is guaranteed. . Therefore, the conventional problems such as biting and catching of the rear end material E occurring on the introduction side are surely solved.
Incidentally, as shown in FIG. 5, the pressing roll 18 of the end material holding means 17 may be driven and rotated directly by the motor 30 or indirectly via the transmission mechanism 31. If it does in this way, conveyance drive can be given to back end material E also with this presser roll 18.

When the pressing roll 18 is driven and rotated in this way, it is possible to perform speed control that increases the conveying speed applied to the rear end material E compared to the conveying speed of the material W to be cut. For this reason, this method also ensures the effect of not being in a forward-downward posture until it passes through the cutting position by the upper and lower shear blades 2 and 3.
This method can also be carried out with the guide roll 13 of the guiding means 10, and similarly, the speed may be controlled so as to increase the conveying speed of the trailing end material E compared to the conveying speed of the material W to be cut.
By the way, the present invention is not limited to the above-described embodiment, and can be appropriately changed according to the embodiment.

It is the side view which showed one Embodiment of the flying shear which concerns on this invention. It is the figure which expanded and showed a part in FIG. It is the figure which showed the operation | movement condition from FIG. It is an AA line enlarged arrow figure of FIG. It is a top view of a pressing roll and its vicinity. It is the side view which showed typically an example of the conventional flying shear. It is a side view explaining the problem which may occur in the flying shear of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flying shear 2 Shear blade 3 Lower shear blade 4 Upper horizontal axis 6 Lower horizontal axis 10 Guide means 13 Guide roll 17 End material holding means 18 Pressing roll

Claims (5)

A pair of upper and lower shear blades (2) provided so as to be relatively rotatable about upper and lower horizontal axes (4, 6) having parallel axes and meshing at an opposite intermediate position when both horizontal axes (4, 6) rotate. , 3) and guiding means (10) for guiding the material to be cut W to the upper and lower shear blades (2, 3) side,
The guiding means (10) includes a rear end member (E) that is generated at the end when the workpieces (W) are sequentially cut by the upper and lower shear blades (2, 3). A flying shear characterized in that end material holding means (17) is provided for preventing the end material (E) from being guided to the upper and lower shear blades (2, 3) in the forwardly lowered state.   The flying shear according to claim 1, wherein the end material holding means (17) has a pressing roll (18) which is provided on the downstream side of the guiding means (10) and is movable up and down.   The flying shear according to claim 2, wherein the pressing roll (18) is an idle roll or a driving roll.   The guide means (10) is provided with a plurality of guide rolls (13) for supporting and guiding the material to be cut (W) from below on the downstream side of the guide means (10). The flying shear according to any one of claims 1 to 3, which is an idle roll or a drive roll.   The presser roll (18) is arranged at a position facing one of the plurality of guide rolls (13) in the vertical direction, and on the downstream side of the guide roll (13) facing the presser roll (18). 5. Flying shear according to claim 4, characterized in that at least one further guide roll (13) is arranged.

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