JPS6324766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting device for a steel billet removal machine.

Surface defects such as cracks and sludge defects that occur during steelmaking and blooming have a large effect on the quality of steel slabs, and removal of these defects is an important issue in terms of quality control. Therefore, a flaw detector installed on the flaw detection line is used to detect flaws on the surface of the steel billet, and the steel billet is loaded into the flaw removal line, and the steel billet is conveyed in the longitudinal direction by the conveyance rollers of this flaw removal line. In the meantime, a flaw removal machine is used to remove surface flaws from the steel pieces. This type of flaw removing machine uses a driving roller and a driven roller to hold the steel piece conveyed by a conveying roller, and while the main body of the flaw removing machine follows the bending etc. of the steel piece, the main body of the flaw removing machine is There is a type that cuts surface flaws in steel pieces using a cutter installed on the steel plate. In this case, in order to effectively remove defects such as bends in the steel billet, the main body of the defect removing machine must be supported in a floating state, and the front and rear conveyor rollers of the steel billet should be Even if both ends interfere, it is necessary to avoid applying excessive external force to the conveying roller. In other words, if the billet is curved, for example, so that the longitudinal center of the billet is curved upward, when the weight of the flaw removal machine body is applied to the front and rear conveyance rollers via the billet, the conveyance of the billet will be interrupted. In order to prevent this, it is necessary to support the flaw removing machine body in a floating state. However, in the past, a frame was provided that protruded laterally from the upper end of the support frame to the upper part of the flaw removing machine body, and at the tip of this frame,
The flaw removing machine body was suspended via a pair of vertical lifting cylinders, and the flaw removing machine body was supported in a floating state by these pair of lifting cylinders, so there was a limit to the degree of freedom, and the steel It has the disadvantage that it cannot reliably follow deformations such as bending, meandering, and twisting of the pieces.

The present invention provides a lifting device for a steel billet flaw removal machine that solves these conventional problems, and its characteristics are as follows:
3, the steel billet 1 is held between plural sets of drive rollers 21 and driven rollers 28 in the longitudinal direction of the billet provided in the flaw removal machine main body 4.
In a steel billet flaw removing machine that cuts surface flaws on a steel billet 1 with a cutter 25 provided on the flaw removing machine body 4 while making the flaw removing machine body 4 follow the steel billet 1, the flaw removing machine body 4 A cantilevered frame 29 is erected at a distance from one side in the longitudinal direction of the steel piece, and a cantilevered frame 29 is provided at the upper end of the cantilevered frame 29 so as to protrude upward from the flaw removal machine main body 4. A pair of left and right lifting arms 32 are pivotably supported vertically by shafts 31 in the left and right direction perpendicular to the longitudinal direction of the steel billet, and
The flaw removing machine body 4 is suspended from the tip of each lifting arm 32 via a hanging cable 38, and a lifting cylinder 33 for vertically moving each lifting arm 32 is cantilevered with the lifting arm 32. It is located at a point provided between the frame 29 and the frame 29.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIGS. 1 and 2, 1 is a steel billet, which is conveyed in the longitudinal direction by conveyance rollers 2 and 3.
Reference numeral 4 denotes a flaw removal machine body, which is connected to upper and lower clamping frames 5 and 6 arranged vertically perpendicular to the conveying direction of the steel billet 1, and to the upper and lower clamping frames 5 and 6 via pins 7 and 8. A pair of left and right tightening cylinders 9 and a steel piece 1
Two sets of drive roller units 10 and a driven roller 11 are arranged to sandwich the steel billet 1, and four cutter units 12 are provided.
It is configured to feed the material and cut surface flaws. A pair of left and right mounting frames 14 are pivotally connected to a bracket 13 attached to the lower surface of the upper tightening frame 5 by pins 15 parallel to the conveying direction of the steel billet 1, and the lower tightening frame 6 has a bracket 13 attached to the lower side thereof. A pair of left and right mounting frames 17 are pivotally connected to a bracket 16 attached to the side surface by pins 18, and each of these mounting frames 14, 17 is connected to a bracket 16 by pins 15, 18.
Attitude holding devices 19, 2 on the opposite side to the steel piece 1
0 to the upper and lower clamping frames 5 and 6, respectively. As shown in FIG. 3, the pair of left and right mounting frames 14 are provided with a pair of front and rear drive rollers 21.
and a drive motor 22 for driving the drive roller units 10, and a swing arm 24 that can freely swing around a rotation shaft 23 of the drive roller unit 10 is provided to protrude back and forth. There is. Each swinging arm 24 is equipped with a cutter unit 12 having a cutter 25 and a drive motor 26 for driving it, and the swinging arm 24 is connected to an operating cylinder 27 provided between the swinging arm 24 and the mounting frame 14. The cutter 25 can be operated in the direction of cutting into the steel piece 1.

A pair of front and rear driven rollers 28 are freely rotatably attached to the pair of left and right mounting frames 17 so as to correspond to the drive rollers 21 of each drive roller unit 10 and to sandwich the steel piece 1 between the drive rollers 21. ing. The drive roller 21 and the driven roller 28 of the drive roller unit 10 are configured to always maintain a perpendicular attitude to the surface of the steel piece 1 and follow the deformation of the steel piece 1, and the cutter unit 12
The cutter 25 is held perpendicular to the surface to be cut of the steel piece 1 and is movable in the width direction of the surface to be cut.

Reference numeral 29 denotes a cantilever frame, which is disposed on the left and right sides of the flaw removal machine main body 4 so as to sandwich the conveyance line of the steel piece 1 in the direction of conveyance. A horizontal rotation shaft 31 is installed. A pair of left and right lifting arms 32 that protrude above the flaw removing machine main body 4 are fixedly attached to both ends of the rotating shaft 31, and a longitudinal midway portion of each lifting arm 32 and a cantilever frame 29 are connected to each other. Between them, a lifting cylinder 33 for vertically moving each lifting arm 32 around the rotation shaft 31 is connected to the pin 3.
It is attached by 4,35. A suspension cable, for example, a suspension chain 38 is connected to the tip of each lifting arm 32 via a pin 36 and a connector 37, and the lower end of this suspension chain 38 is connected to both left and right ends of the upper tightening frame 5. Pin 4 to fixed bracket 39
0, connected via a connector 41. Therefore, the flaw removing machine main body 4 is suspended by the lifting arm 32 by the suspension chain 38, and can be raised and lowered by moving the lifting arm 32 up and down by the lifting cylinder 33. 41 is an upper cushion cylinder, 42 is a lower cushion cylinder, and there is a pair of these cushion cylinders 41 and 42 on the left and right. 43
and the upper clamping frame 5, and the lower cushion cylinder 42 is parallel to the conveying direction of the steel billet 1 between the lower frame 44 and the lower clamping frame 6, which are also horizontally suspended between the cantilever frames 29. It is installed so that In addition, guide rollers 45 and 46 are supported by brackets 47 and 48 at the front and rear of the flaw removing machine main body 4 so as to be located on the same straight line as the conveyance rollers 2 and 3.

Next, the operation of the above configuration will be explained. Steel piece 1
When waiting for the steel strip to be transported, the space between the upper and lower clamping frames 5 and 6 is opened so that even if the steel strip 1 is bent or meandered, it can freely enter the flaw removing machine body 4. The flaw removing machine main body 4 is suspended by a lifting arm 32 via a suspension chain 38. That is, the tightening cylinder 9 is operated in the extension direction to the maximum stroke, and the upper and lower tightening frames 5,
6 are vertically separated, the pair of lifting cylinders 33 are operated in the extension direction, the lifting arm 32 is rotated upward around the rotation shaft 31, and the flaw removal machine body 4 is moved by the hanging chain 38. Keep it suspended. When the tip of the steel piece 1 passes through the conveyance roller 2 and the guide roller 45 and reaches the drive roller unit 10 of the flaw removing machine main body 4, the lifting cylinder 33 is actuated in the contraction direction by a signal from a detector (not shown) to remove the flaw. At the same time as lowering the machine body 4, the tightening cylinder 9 is operated in the contraction direction, and the steel piece 1 is moved between the driving roller 21 and the driven roller 28.
Clamp and tighten with the hands. In this state, the lifting cylinder 33 is controlled to be in a floating state and carries the load of the flaw removing machine main body 4, so that the load of the flaw removing machine main body 4 is transferred through the steel piece 1 regardless of the conveying rollers 2 and 3. The steel piece 1 is placed in a floating state so as to follow the deformation of the steel piece 1. Then, the steel billet 1 is moved at a predetermined feed speed by the drive roller 21 of the drive roller unit 10, and when a flaw signal is emitted from the flaw detector during this time, the cutter unit 12 is operated at the flaw position and the cutter is detected. 25 rotates to cut and remove flaws on the steel piece 1. That is, if there is a flaw signal, the cutter 25
moves in the width direction of the surface to be cut to the flaw position, the operation cylinder 27 is operated to perform a predetermined cutting operation, and the flaw is cut by the cutter 25. When the flaw signal disappears, the cutter 25 returns to its original position, and the same operation is repeated for each flaw signal to remove the flaw.

During the process of removing defects from the steel billet 1, if the steel billet 1 is curved upwards as shown in FIG. 4, a detector (not shown) detects the curve and supplies pressure oil to the lifting cylinder 33. The flaw removal machine main body 4 is pulled up by the lifting arm 32 and the hanging chain 38, and controlled so that the steel piece 1 does not hit the conveyance rollers 2 and 3. In addition, since the flaw removal machine main body 4 is suspended by the lifting arm 32 via the suspension chain 38, the
The posture can be arbitrarily changed by bending the steel plate 1. Therefore, even if the steel piece 1 is curved as shown in FIG. 5 or 6, it will tilt and follow the curvature of the steel piece 1. Further, when the billet 1 is meandering, the right and left sides of the flaw removing machine body 4 swing back and forth to follow the meandering of the billet 1, as shown in FIG. Can prevent flying out. Furthermore, if the steel piece 1 is twisted, the main body 4 of the flaw removal machine changes its attitude around the steel piece 1 in the direction of the arrow as shown in FIG.

When the end of the steel piece 1 reaches the drive roller unit 10, the lifting cylinder 33 and the tightening cylinder 9 are actuated by a signal from a detector (not shown) to release the steel piece 1 and return to the standby state.

Although it is desirable that the pair of left and right lifting cylinders 33 be operated in synchronization, synchronization is not necessarily required. Moreover, one pulling cylinder 33 may be provided in the center. As the suspension cable, in addition to the suspension chain 38 shown in the embodiment, it is also possible to use a wire rope or other flexible cable. The flaw removing machine main body 4 is not limited to the configuration of the embodiment, and the flaw removal machine main body 4 is
The cutter unit 12 may be arranged on each surface.

According to the present invention, as detailed in the embodiments above,
A cantilevered frame is installed upright at a distance from one side in the longitudinal direction of the steel strip with respect to the flaw removal machine body, and a cantilevered frame is provided at the upper end of the cantilevered frame, protruding from the cantilever frame to the upper side of the flaw removal machine body. A pair of left and right lifting arms are vertically swingably supported by a left and right axis perpendicular to the longitudinal direction of the steel strip, and a flaw removing machine main body 4 is connected to the tip of each lifting arm via a hanging cable. A lifting cylinder for vertically moving each lifting arm is installed between the lifting arm and the cantilever frame. Even though the steel piece is held between the driving roller and the driven roller, the degree of freedom of the flaw removing machine body is significantly greater due to the bending of the hanging cable compared to the conventional suspension type using a lifting cylinder. , the flaw removing machine body can freely follow the bending, meandering, twisting, etc. of the steel piece.
It is possible to remove defects easily and reliably. In particular, since the flaw removing machine body is suspended from the ends of the pair of left and right lifting arms via hanging cables, if the steel piece is twisted, the flaw can be removed by bending the left and right hanging cables. The machine body rotates around the axis of the steel billet, and the follow-up performance of the flaw removing machine body is significantly improved. In addition, the cantilever frame is erected at a distance from the flaw removing machine body in the longitudinal direction of the steel strip, and a lifting arm is protruded from the upper end of this cantilever frame to the upper side of the flaw removing machine body, and the lifting arm is The flaw removing machine body is suspended from the tip of the arm via a hanging cable, and the flaw removing machine body is supported in a cantilevered manner without being surrounded by a frame, making it easy to remove defects. This also has the advantage of improving the maintainability of the machine body.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a partially cutaway side view showing the overall configuration, FIG. 2 is a partially cutaway rear view, FIG. 3 is a side view of the main parts, and FIG. figure,
FIG. 5, FIG. 6, FIG. 7A, B, and FIG. 8 are operation explanatory diagrams. DESCRIPTION OF SYMBOLS 1... Steel piece, 2, 3... Conveyance roller, 4... Scratch removing machine body, 5, 6... Upper and lower tightening frames, 10...
... Drive roller unit, 12 ... Cutter unit, 29 ... Cantilever frame, 32 ... Lifting arm, 33 ... Lifting cylinder, 38 ... Hanging chain.

Claims (1)

[Claims] 1. A steel piece 1, which is conveyed in the longitudinal direction by the conveyance rollers 2 and 3, is held between plural sets of driving rollers 21 and driven rollers 28 in the longitudinal direction of the steel piece provided in the flaw removing machine main body 4, In a steel billet flaw removing machine that cuts surface flaws on a steel billet 1 with a cutter 25 provided on the flaw removing machine body 4 while making the flaw removing machine body 4 follow the steel billet 1, the flaw removing machine body 4 A cantilevered frame 29 is erected at a distance from one side in the longitudinal direction of the steel piece, and a cantilevered frame 29 is provided at the upper end of the cantilevered frame 29 so as to protrude upward from the flaw removal machine main body 4. A pair of left and right lifting arms 32 are pivoted to be vertically swingable by shafts 31 in the left and right direction perpendicular to the longitudinal direction of the steel piece. A steel flake removing machine characterized in that a lifting cylinder 33 for suspending the machine body 4 and moving each lifting arm 32 up and down is provided between the lifting arm 32 and the cantilever frame 29. lifting device.