JP6984627B2 - Steel strip cutting equipment - Google Patents

Description

The present invention relates to a steel strip cutting equipment for accommodating cutting chips generated when cutting a steel strip in a scrap bag.

Generally, in a continuous pickling line or the like in which a steel strip is continuously pickled, the rear end portion of the leading material and the tip portion of the trailing material are welded by a welding machine. When connecting the ends of the steel strips to each other, the ends of the steel strips are cut by shears using a cutting facility in order to remove the shape defects of the ends. As an example of this cutting equipment, for example, cutting equipment as in Patent Documents 1 to 3 is used. The cutting equipment of Patent Documents 1 to 3 is an up-cut shear equipment incorporated in a rolling line, in which a lower blade is fixed and an upper blade is moved up and down to cut a steel strip.

In the cutting equipment described above, cutting chips are generated by cutting the steel strip. Normally, the cutting chips fall on the belt conveyor and are discharged, and also fall into the scrap bag and are discharged. When a scrap bag is used, the scraps slide down the scrap guide, fall into the scrap bag, and are stacked and accumulated in the scrap bag.

Here, if the cutting chips do not slide off the scrap guide and stay in the vicinity of the shear, the steel strip cannot be continuously processed. Therefore, in order to smoothly guide the cutting chips to the scrap back, it has been proposed to provide a plurality of rolls on the surface on which the cutting chips slide off (see, for example, Patent Document 4). Patent Document 4 discloses an up-cut shear facility in which a plurality of rolls are provided on the surface of an elevating table for sliding cutting chips down to a scrap bag.

Special Publication No. 48-20074 Jitsukaisho 60-4318 Gazette Jikkenhei 6-3522 Gazette Japanese Unexamined Patent Publication No. 2016-64464

Here, the shape of the cutting chips is not uniform and has various shapes. For example, the tail end of the cutting chips has an irregular curved shape for each steel plate coil. Further, the steel strip drawn from the steel plate coil may have a flat shape, or may have a curved shape on the upper side or the lower side. When a scrap guide as in Patent Document 4 is used for cutting cutting chips having various shapes, the cutting chips may be caught on the roll depending on the shape of the cutting chips, and the cutting chips may reach the scrapback. It may not slide off and may be clogged with cutting scraps.

Therefore, the present invention has been made in view of the above problems, and provides a steel strip cutting facility capable of suppressing the occurrence of cutting debris clogging regardless of the shape of the cutting debris. The purpose is.

The present invention has the following configurations in order to solve these problems.
[1] A frame having an insertion slot into which the material to be cut is inserted, and
A shear that is arranged on the inlet side of the insertion slot and cuts the material to be cut inserted from the insertion slot.
A scrap guide that is inclined downward from the outlet side of the insertion port toward the insertion direction of the material to be cut and guides the fall of cutting chips generated when the material to be cut is cut by the shear.
A lower guide portion provided in a part of the area on the scrap guide and inclined downward so that the inclination angle with respect to the horizontal direction is smaller than the inclination angle of the scrap guide.
A rotary roll unit on the scrap guide, which is installed below the lower guide portion and has a rotary roll adjacent to the lower end of the lower guide portion, and a rotary roll unit.
A steel strip cutting facility characterized by having.
[2] The steel strip cutting equipment according to [1], wherein the rotary roll unit holds the rotary roll so that it can move up and down.
[3] The steel strip cutting equipment according to [1] or [2], wherein the lower guide portion is provided at the center in the width direction of the scrap guide.
[4] The steel strip cutting equipment according to any one of [1] to [3], wherein the lower guide portion is attached so that the inclination angle can be adjusted.
[5] The steel strip according to any one of [1] to [4], which is arranged at a position facing the scrap guide in the frame and further includes an upper guide portion inclined upward. Cutting equipment.
[6] The cutting equipment according to [5], wherein the upper guide portion is detachably attached to the frame.

According to the steel strip cutting equipment of the present invention, since the lower guide portion and the rotary roll unit are provided on the scrap guide, the scrap has a warped shape even if the tail end portion has an irregular shape. Even if this is the case, it is possible to prevent the scrap guide from being clogged with cutting waste.

It is a perspective view which shows the preferable embodiment of the cutting equipment of this invention. It is a schematic diagram which shows the preferable embodiment of the cutting equipment of this invention. It is a schematic diagram which shows an example of the lower guide part and the rotary roll unit in the cutting apparatus of FIG. It is a schematic diagram which shows an example of the lower guide part and the rotary roll unit in the cutting apparatus of FIG. It is a schematic diagram which shows an example of the lower guide part and the rotary roll unit in the cutting apparatus of FIG. It is a schematic diagram which shows the shape of the tail end portion (coil end) of the steel plate coil which wound the steel plate after hot rolling into a coil shape. It is a schematic diagram which shows the state which the cutting waste of the upward warp shape or the downward warp shape is generated in the conventional cutting equipment.

Hereinafter, embodiments of the present invention will be described. FIG. 1 is a perspective view showing a preferred embodiment of the cutting equipment of the present invention, and FIG. 2 is a schematic view showing a preferred embodiment of the cutting equipment of the present invention. The cutting equipment 1 of FIGS. 1 and 2 cuts the end portion of the steel plate coil C in, for example, a continuous pickling line or a rolling line, and has a frame 2, a shear upper blade 10a, and a shear lower blade. It is provided with 10b, a scrap guide 20, a lower guide portion 30, a rotary roll unit 40, and the like.

The frame 2 has an insertion port 2a into which the material to be cut K is inserted, and the material K to be cut extending from the steel plate coil C is inserted into the insertion port 2a. The shears 10a and 10b are arranged on the inlet side of the insertion port 2a, and cut the material K to be cut inserted by a predetermined length from the insertion port 2a. The material K to be cut cut by the shears 10a and 10b becomes cutting waste. The structure of the shears 10a and 10b may be any structure as long as it cuts the material K to be cut, for example, an upcut shear in which the lower blade 10b of the shear is fixed and the upper blade 10a of the shear moves up and down. Alternatively, it may be an up-and-down cut shear in which both the lower blade 10b and the upper blade 10a of the shear move up and down.

For example, the scrap guide 20 has a flat upper surface and is made of a plate-shaped member having the same width as the insertion port 2a. The scrap guide 20 is inclined downward from the insertion port 2a toward the insertion direction (arrow X1 direction) of the material K to be cut. That is, in the scrap guide 20, the upper end 20X side is located on the insertion port 2a side, and the lower end 20Y side is located at a position lower than the insertion port 2a. The scrap guide 20 guides the movement of cutting chips generated when the material K to be cut is cut by the shears 10a and 10b. A scrapback SB for accommodating the scraps is arranged under the scrap guide 20, and the scraps guided by the scrap guide 20 are accommodated in the scrapback SB.

3 to 5 are schematic views showing an example of a lower guide portion and a rotary roll unit in the cutting device of FIG. 1. Note that FIG. 3 shows a view seen from the XY plane, FIG. 4 shows a view seen from the YY plane, and FIG. 5 shows a view seen from the XY plane. The lower guide portion 30 of FIGS. 1 to 5 is made of, for example, a plate-shaped member, and is provided in a part of a region on the scrap guide.

The material K to be cut is inserted from the insertion port 2a so that the center of the material K to be cut coincides with the center of the insertion port 2a and the scrap guide 20. Therefore, in FIGS. 1 to 5, the lower guide portion 30 is provided at the central portion of the scrap guide 20 and the insertion port 2a in the width direction (arrow Y direction), for example. As a result, if the lower guide portion 30 is also located in the central portion, even if the scraps that slide down are tilted in the width direction (arrow Y direction), it is possible to minimize catching on both ends of the scrap guide 20.

In the lower guide portion 30, the upper end 30X is in contact with the scrap guide 20, and the lower end 30Y is inclined downward toward the insertion direction of the material K to be cut (arrow X1 direction) so as to float from the scrap guide 20. There is. Therefore, the inclination angle θ1 of the lower guide portion 30 with respect to the horizontal direction (arrow X direction) is smaller than the inclination angle θ2 of the scrap guide 20. The tilt angle of the lower guide portion 30 is adjustablely supported by the guide holding portion 31, so that the height positions of the tilt angle θ1 and the lower end 30Y can be adjusted. The lower guide portion 30 may be fixed to the scrap guide 20.

For example, two rotary roll units 40 are installed on the lower end 20Y side of the scrap guide 20 and on the lower side of the lower guide portion 30. The rotary roll unit 40 is provided with a rotary roll 43 adjacent to the lower end of the lower guide portion 30 at the upper portion. Specifically, the rotary roll unit 40 can be rotated by a unit main body 41 fixed on the scrap guide 20, a roll support portion 42 mounted so as to be vertically movable with respect to the unit main body 41, and a roll support portion 42. A holding rotary roll 43 and a fixing member 44 for fixing the unit main body 41 and the roll support portion 42 are provided.

The unit main body 41 is a member having a hollow portion fixed to the lower end 20Y side of the scrap guide 20, and extends upward (arrow α direction) from the scrap guide 20. The lower portion of the roll support portion 42 is housed in the hollow portion of the unit main body 41, and is connected so as to be vertically movable by a fixing member 44 such as a bolt. As described above, since the unit main body 41 and the roll support portion 42 are installed so as to be movable up and down, the height position of the rotary roll 43 from the scrap guide 20 can be adjusted.

The roll support portion 42 rotatably supports the rotary roll 43 at the upper portion, and the rotary roll 43 is positioned at a position adjacent to the lower end 30Y of the lower guide portion 30. Then, when the cutting chips slide on the lower guide portion 30 and move, the rotating roll 43 rotates along the insertion direction (arrow X1 direction) of the material K to be cut. The rotary roll 43 is preferably supported by the unit main body 41 and the roll support portion 42 so as to protrude from the height position of the lower end 30Y of the lower guide portion 30. As a result, it is possible to reliably prevent the cutting chips from coming into contact with the lower end 30Y of the lower guide portion 30 and being caught.

Further, the steel strip cutting equipment 1 is arranged at a position facing the scrap guide 20, and includes an upper guide portion 50 inclined upward. The upper guide portion 50 prevents the material to be cut K from coming into contact with the frame 2 when the material to be cut has an upward warp shape. It is desirable that the upper guide portion 50 has a structure that can be removed with one touch so as not to impair the maintainability of the steel strip cutting equipment 1.

Next, an operation example of the cutting equipment 1 will be described with reference to FIGS. 1 to 5. First, the end portion (coil end) of the steel plate coil C is inserted from the insertion port 2a, and after being inserted to a predetermined length, the shears 10a and 10b are operated to cut the steel plate coil C. Then, the cutting chips fall onto the scrap guide 20 and the lower guide portion 30, and slide downward while being guided by the scrap guide 20 and the lower guide portion 30. At this time, since the lower guide portion 30 protrudes from the top of the scrap guide 20, the tail end portion of the cutting scrap slides down from the scrap guide 20 in a floating state. Therefore, even if the shape of the tail end is irregular for each steel plate coil, the cutting chips do not behave differently for each shape of the different tail end, and do not stop in the middle of the scrap guide 20 and smoothly. It will slide down.

After that, when the cutting chips reach the lower end of the lower guide portion 30, the cutting chips are smoothly dropped into the scrapback SB by the rotation of the rotary roll 43, and are stored in the scrapback SB in a sideways state. In other words, the rotary roll 43 prevents the cutting debris from falling down with the lower end of the lower guide portion 30 as a fulcrum, and suppresses the cutting debris from being stored in the scrapback SB in a standing state. be able to. In particular, when the cutting chips have a downward warp shape, the cutting chips are prevented from falling vertically downward (arrow Z direction) so as to be caught at the lower end 30Y, and slide in the insertion direction (arrow X1 direction). Can be dropped.

According to the above embodiment, the rotary roll unit 40 is installed on the lower end 30Y side of the lower guide portion 30. Then, even when various irregular tail-shaped cut materials are cut, the cutting chips are not clogged and the occurrence of troubles in the cutting work can be suppressed.

FIG. 6 is a schematic view showing the shape of the tail end portion (coil end) of a steel plate coil in which a steel plate after hot rolling is wound into a coil shape. FIG. 7 is a schematic view showing a state in which cutting chips having an upward warp shape or a downward warp shape are generated in the conventional cutting equipment. In FIG. 6, each steel plate coil C1 to C3 has tail end portions E1 to E3 having different shapes. For example, in the case of the tail end portion E2 of the steel plate coil C2, the cut scraps are sent to the scrapback SB regardless of whether the structure is provided with only the scrap guide 20 or the structure is provided with a plurality of rolls on the surface of the scrap guide 20. It can be dropped well.

However, the shape of the material K to be cut is often an irregular tail end shape such as the tail end portion E1 of the steel plate coil C1 or the tail end portion E3 of the steel plate coil C3. In the case of the tail ends E2 and E3, the scrap may be caught on the roll on the surface of the scrap guide 20 and the cutting chips may be stagnant on the scrap guide 20. In particular, in the case of cut chips having a downward warp shape (see K20 in FIG. 7), the tail end of the steel plate coil is pressed against the surface of the scrap guide 20 and falls, so that the scrap tends to be particularly stagnation.

Here, it is conceivable to provide only the lower guide portion 30 without attaching the rotary roll unit 40. In this case, the stagnation of the material to be cut having an irregular tail end shape on the scrap guide 20 can be reduced. However, as in the case of the downward warp-shaped cutting scrap K20 in FIG. 7, there may be a case where the cutting scrap stands in the scrapback SB and does not fit well in the scrapback SB.

Therefore, not only the lower guide portion 30 but also the rotary roll unit 40 is provided on the lower end 30Y side of the lower guide portion 30. Then, even when the material K to be cut having an irregular tail end shape is cut, the cutting chips do not stand in the vertical direction (arrow Z direction) in the scrapback SB and are laid horizontally. Can be accommodated at. As a result, it is possible to suppress the occurrence of troubles in the cutting work without clogging the cutting chips in the middle.

Further, the lower guide portion 30 and the rotary roll unit 40 can be adjusted in the height direction (arrow α direction). This makes it possible to easily adjust the drop angle of the cutting chips onto the scrapback SB. That is, when the drop angle is adjusted regardless of the height adjustment function, it is necessary to remove the scrap guide 20, modify the attachment and the like, and re-install. On the other hand, the drop angle can be adjusted by adjusting the lower guide portion 30 and the rotary roll unit 40 in the height direction (arrow α direction) using a simple mechanism.

Further, when the cutting equipment 1 includes the upper guide portion 50 inclined upward from the insertion port 2a, when the shape of the material to be cut K is an upward warp shape (see the cutting waste K10 in FIG. 7), the cutting equipment It is possible to prevent the material K to be cut from coming into contact with the upper part of 1.

The embodiment of the present invention is not limited to the above embodiment, and various modifications can be made. For example, the case where one lower guide portion 30 is provided in the substantially central portion in the width direction of the scrap guide 20 is illustrated, but for example, a plurality of lower guide portions 30 may be provided at a predetermined pitch. In this case, the rotary roll unit 40 is arranged at the lower end 30Y of each lower guide portion 30. At this time, the width of the lower guide portion 30 can be appropriately changed. Further, in the above embodiment, the case where two rotary roll units 40 are installed is illustrated, but one wide rotary roll unit 40 may be provided.

1 Steel strip cutting equipment 2 Frame 2a Insertion port 10a Shear upper blade 10b Shear lower blade 20 Scrap guide 20X Scrap guide upper end 20Y Scrap guide lower end 30 Lower guide part 30X Lower guide part upper end 30Y Lower guide part lower end 31 Guide holding part 40 Rotating roll unit 41 Unit body 42 Roll support part 43 Rotating roll 44 Fixing member 50 Upper guide parts C, C1 to C3 Steel plate coils E1 to E3 Tail end part K Scrap back

Claims (5)

A frame with an insertion slot into which the material to be cut is inserted, and
A shear that is arranged on the inlet side of the insertion slot and cuts the material to be cut inserted from the insertion slot.
A scrap guide that is inclined downward from the outlet side of the insertion port toward the insertion direction of the material to be cut and guides the fall of cutting chips generated when the material to be cut is cut by the shear.
A lower guide portion provided in a part of the area on the scrap guide and inclined downward so that the inclination angle with respect to the horizontal direction is smaller than the inclination angle of the scrap guide.
A rotary roll unit on the scrap guide, which is installed below the lower guide portion and has a rotary roll adjacent to the lower end of the lower guide portion, and a rotary roll unit.
Have a,
The rotary roll unit is a steel strip cutting facility that holds the rotary roll so that it can move up and down. The steel strip cutting equipment according to claim 1 , wherein the lower guide portion is provided at the center in the width direction of the scrap guide. The steel strip cutting equipment according to claim 1 or 2 , wherein the lower guide portion is attached so that the inclination angle can be adjusted. The steel strip cutting equipment according to any one of claims 1 to 3 , further comprising an upper guide portion inclined upward and arranged at a position facing the scrap guide in the frame. .. The cutting equipment according to claim 4 , wherein the upper guide portion is detachably attached to the frame.

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