JPH0113991B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact type sensor device for a steel billet flaw removal machine, which mechanically cuts and removes various flaws such as cracks and sludge defects on the surface of a steel billet using a rotary cutter. In a chip removal machine, this is used to sense the bending of a steel piece and detect the position of the cutter relative to the surface to be cut.

Cracks, sludge defects, etc. that occur during the steelmaking stage or during blooming have a large effect on the quality of steel products, and a steel billet de-flaw machine has been developed that mechanically cuts and removes such surface flaws using a rotating cutter. This steel billet flaw removal machine includes a cutter unit that can approach and leave the cut surface of the steel billet, and a rotary cutter that is supported by the cutter unit so as to be movable in the width direction of the cut surface. When a flaw signal is emitted from the flaw detector, the feed rate of the steel billet is set to the predetermined cutting feed rate, and then the corresponding cutter unit among the multiple cutter units is activated and rotated according to the flaw position. Surface flaws are removed using a cutter. On the other hand, since the steel pieces are bent and deformed,
While the steel billet is held between the driving roller unit and the driven roller unit, the crack removal machine body is supported in a floating state, and if the steel billet is bent, the entire crack removal machine body follows the steel billet. Perform tilting movements, etc.
The rotary cutter is always kept perpendicular to the surface of the steel billet to be cut. In addition, in order to promptly respond to bends and deformations in the steel billet and reliably remove surface flaws, the bends, deformations, etc. are detected over the entire width of the cut surface of the steel billet, and the position of the rotary cutter relative to the cut surface is determined. It is necessary to accurately grasp the bending, deformation, etc. of the cutter and control the position of the rotary cutter in the cutting direction.

Therefore, as shown in FIG. 1, a pair of sensor shoes 2 are arranged with the rotary cutter 1 in between, and the sensor shoes 2 are brought into contact pressure contact with the surface to be cut of the steel billet 3. A contact-type sensor device has been proposed that detects bending, deformation, etc. of a steel piece 3 by converting vertical movement of the steel piece 2 into an electric signal using a potentiometer 4 (Japanese Patent Application Laid-open No. (See Publication No. 55-58908). but,
In the conventional sensor device, the sensor shoe 2 is attached via a mounting portion 7 to the tip of a slide member 6 that is slidably supported by a guide member 5, and the sensor shoe 2 is supported in a cantilevered manner by the slide member 6. Therefore, there was a problem that the slide member 6 got caught on the guide member 5, resulting in a lack of smooth operation.
Furthermore, since the dimensions of the mounting portion 7 cannot be made large, looseness is likely to occur, and the looseness of the mounting portion 7 is greatly magnified by the detection portion of the sensor shoe 2. There was a problem in that the detection part of the sensor show 2 swayed greatly in the width direction of the steel piece 3 due to play in the stopper part. In addition, a potentiometer 4 is attached to each sensor show 2, so two potentiometers 4 are required, and since the movement of the sensor show 2 is directly detected by the potentiometer 4, the detection accuracy is There were cases in which slight bends, etc. could not be detected.

In view of these conventional problems, the present invention provides a sensor device with a pivot structure in which both ends of a sensor shoe are pivoted. A cutter unit that moves a cutter having a parallel axis of rotation along the width direction of the steel billet in the width direction of the steel billet along the surface of the steel billet, and a cutter unit that moves the cutter in the width direction of the steel billet along the surface of the steel billet; an arcuate sensor shoe which is disposed in the steel strip and is movable toward and away from the steel strip surface and moves along with the movement of the cutter unit in the steel strip width direction, and detects vertical displacement of the sensor shoe with respect to the steel billet surface; In a contact type sensor device for a steel billet removing machine, which includes a sensor section and a control device that controls the depth of cut of the cutter into the surface of the steel billet by detecting the displacement of the sensor section, the arcuate sensor shoe is , has a both-end support structure, one end of which is a rotation center that is rotatably supported, and the other end is a connection part that is connected to the sensor section, and the rotation center is connected to the rotation center. is connected to an actuator that holds it in place and moves it in a direction perpendicular to the surface of the billet.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 2 and 3, 10 is a steel piece;
It is transported in the longitudinal direction by transport rollers (not shown). Reference numeral 11 denotes a flaw removing machine body, which is connected to upper and lower clamping frames 12 and 13 arranged vertically perpendicular to the conveying direction of the steel billet 10, and to the clamping frames 12 and 13 via pins 14 and 15. It is equipped with a pair of left and right tightening cylinders 16, two sets of drive roller units 18 and driven roller units 19 arranged so as to sandwich the steel piece 10, and four sets of cutter units 20, which hold the steel piece 10 between them. It is configured to feed the feed and cut surface flaws. A pair of left and right mounting frames 22 are attached to the steel piece 10 on a bracket 21 installed on the lower side of the upper tightening frame 12.
A pair of left and right mounting frames 25 are attached to a bracket 24 attached to the upper surface of the lower tightening frame 13.
are pivotally mounted by a pin 26, and these mounting frames 22, 25 are respectively mounted to the upper and lower clamping frames 12, 13 by posture holding devices 27, 28 on the opposite side of the steel piece 10 with respect to the pins 23, 26. ing. As shown in FIG. 4, the pair of left and right mounting frames 22 are each equipped with a drive roller unit 18 that includes a pair of front and rear drive rollers 29 and a drive motor 30 that drives the drive rollers. A swinging arm 32 that can freely swing around a rotating shaft 31 of 18 is provided so as to protrude back and forth. Each swinging arm 32 is equipped with a cutter unit 20 having a rotary cutter 33 and a drive motor 34 for driving the cutter unit 20. The cylinder 35 allows the cutter unit 20 to be operated toward and away from the cut surface 10a of the steel billet 10. The rotary cutter 33 is detachably attached to the tip of the rotary shaft 36, and is movable in the width direction of the cut surface 10a of the steel piece 10 by a hydraulic cylinder built into the cutter unit 20. A pair of front and rear driven rollers 37 are freely rotatably attached to the pair of left and right mounting frames 25 so as to correspond to the drive rollers 29 of each drive roller unit 18 and to sandwich the steel piece 10 between the drive rollers 29. ing. 38 is a frame body, and the flaw removing machine body 11 is suspended from this frame body 38 via a pair of left and right lifting cylinders 39. The upper and lower ends of the lifting cylinder 39 are pivotally connected to the frame body 38 and the upper tightening frame 12 by pins 40 and 41. 42 is an upper cushion cylinder, 43 is a lower cushion cylinder, and there are a pair of these cushion cylinders 42 and 43 on the left and right. The compression cylinders 43 are installed between the frame body 38 and the lower tightening frame 13 so as to be parallel to the direction in which the steel pieces 10 are conveyed. In addition, 44 and 45 are the flaw removal machine main body 11
These are guide rollers placed before and after the

A contact type sensor device is provided near the rotary cutter 33 of the cutter unit 20, as shown in FIGS. 5 to 9. That is, in FIGS. 5 to 9, reference numeral 46 denotes a movable frame, which is movable together with the rotary cutter 33 by a hydraulic cylinder in the cutter unit 20. A rotary cutter 33 is attached to the tip. An arcuate upper and lower sensor shoe 4 is installed on both sides of the rotary cutter 33.
The upper sensor shoe 47 is swingably supported at one end by a pivot pin 51 on a forked portion 50 at the lower end of the lever 49, and the lower sensor shoe 48 is mounted on a movable frame. One end side is pivotally supported to a mounting portion 52 fixed to 46 by a pivot pin 53 so as to be able to freely sing. 54 is upper sensor show 4
A rotary actuator for switching the interference area leg-up position A and a retracted position B located downward from the rotary cutter 33, and is attached to the movable frame 46 and can freely rotate back and forth around its rotation axis 55. It has a rotating arm 56. A lever 4 is connected to the tip of this rotating arm 56 via a pin 57.
9 are connected. The lever 49 has a stopper pin 58 near its fork 50 and a spring 59.
The stopper pin 58 is inserted so that it can be engaged and detached freely against the
When the stopper pin 58 is removed, the position of the pivot pin 51 is released, and the actuator 54 moves the upper sensor shaft 47 can be evacuated to the evacuation position B. 61 is a guide housing, and the movable frame 4
A slide member 64 is pivotally supported via a pin 63 to a bracket 62 attached to the guide housing 61, and a slide member 64 is slidably attached to the guide housing 61 in a direction toward and away from the surface to be cut 10a of the steel piece 10. It is provided. The other ends of the upper and lower sensor shoes 47 and 48 are swingably supported on both sides of the lower end of the slide member 64 by pivot pins 65.
66 is the surface to be cut 10 of the sensor shoes 47 and 48
A potentiometer (sensor section) that detects displacement in the vertical direction with respect to a via the slide member 64
The main body side is incorporated into a housing cap 67 attached to the guide housing 61, and the actuation rod 68 of this potentiometer 66
is urged downward by a spring 69, and its lower end is brought into contact with the slide member 64. Further, a spring 70 is interposed between the potentiometer 66 and the slide member 64 to bias the slide member 64 toward the steel piece 10 side. 71
is a cam body fixed to the rotating shaft 55 of the rotary actuator 54, which includes a limit switch 72 for setting confirmation and a limit switch 73 for confirming reset.
It is configured so that it can be operated. The limit switch 72 for setting confirmation is the upper sensor switch 47.
The reset confirmation limit switch 73 operates when the upper sensor shoe 47 is at the interference area foot-up position A. Reference numeral 74 denotes a chip removal plate for removing chips adhering to the rotary cutter 33, and is attached to the bracket 62. 75 is a proximity switch for detecting chipping of the rotary cutter 33;

Next, the operation of the above configuration will be explained. Steel piece 1
When waiting for the steel piece 10 to be transported, the space between the upper and lower clamping frames 12 and 13 is opened so that even if the steel piece 10 is bent, it can freely enter the flaw removing machine body 11. The flaw removal machine main body 11 here is suspended by a lifting cylinder 39. The tip of the steel piece 10 passes through the guide roller 44 and reaches the flaw removing machine body 1.
1, the pulling cylinder 39 is operated in the extension direction to lower the flaw removing machine body 11, and at the same time the tightening cylinder 16 is operated in the contraction direction to move the steel billet 10 to the drive roller 29. It is clamped and tightened by the driven roller 37. In this state, the lifting cylinder 39 carries the load of the flaw removing machine main body 11, and the load of the flaw removing machine main body 11 is transferred to the steel piece 10.
The flaw removing machine body 11 is placed in a floating state so as to follow the bending etc. of the steel billet 10 without being caught by the conveying rollers. Then, the steel billet 10 is moved at a predetermined feeding speed by the drive roller 29 of the drive roller unit 18, and when a flaw signal is issued from the flaw detector during this time, the cutter unit 20 is operated at the flaw position, and the rotary cutter 33 cuts and removes surface flaws on the cut surface 10a of the steel piece 10.

During this work, a pair of sensors 47, 4
8 comes into contact with the cut surface 10a of the steel piece 10, and the steel piece 1
0 bends, etc. are detected. That is, as shown in FIG.
The pivot pins 51 and 53 are brought into alignment with each other. Then, since the slide member 64 is biased toward the steel piece 10 by the spring 70, the sensor shoes 47, 48 are pressed against the cut surface 10a of the steel piece 10 with spring pressure. If the steel piece 10 is bent, the sensor shoes 47 and 48 swing around the pivot pins 51 and 53, and the potentiometer 66 is activated via the slide member 64 and the actuating rod 69. The amount of displacement of the levers 47 and 48, that is, the amount of bending of the steel piece 10, is output from the potentiometer 66 as a change in electrical resistance.
The steel piece 1 of the rotary cutter 33, such as controlling the expansion and contraction of the
The depth of cut relative to 0 is controlled to be constant. In this case, since the sensor shoes 47 and 48 are swingably supported by the pivot pins 51, 53, and 65, there is no catching or rattling when swinging, and the operation is smooth and stable. Excellent durability.
Also, compared to the dimension from the detection part of the middle part of the sensor shoes 47, 48 to the pivot pins 51, 53, the pivot pins 51, 53 at both ends of the sensor shoes 47, 48
Since the dimensions between 1, 53 and 65 are large, the displacement of the detection part can be magnified by the dimension ratio and transmitted to the potentiometer 66, and even the slightest bend in the steel billet 10 can be reliably detected, resulting in high precision. Detection is possible. Moreover, since the potentiometer 66 can be used for the two sensor shoes 47 and 48, the structure is simple and the cost can be reduced.

When the cutter units 20 on both sides of the steel billet 10 come close to each other as shown in FIG. 10, there is a risk that the upper sensor shoes 47 of each will interfere with each other. Therefore, at this time, the rotation shaft 55 of the rotary actuator 54 is
The upper sensor shoe 47 is rotated in the direction of the arrow, and the upper sensor shoe 47 is lifted up to the interference region foot-up position A by the rotation arm 56 via the lever 49. Even in this state, since the lower sensor shoe 48 is in pressure contact with the steel piece 10, bending of the steel piece 10, etc. can be sufficiently detected.

When replacing the rotary cutter 33, pull the stopper pin 58 against the spring 59, release the engagement of the stopper pin 58 with the receiving part 60, and then rotate the rotary actuator 54 in the direction of the arrow a. Then, the upper sensor shoe 47 is lowered around the pivot pin 65 on the slide member 64 side to the retracted position B, so that the front side of the rotary cutter 33 is in an open state, and therefore the upper sensor shoe 4
The rotary cutter 33 can be replaced without removing the cutter 7.

According to the present invention, as detailed in the embodiments above,
Since it has a pivot structure in which both ends of the sensor shoe are pivoted, the operation is smoother and there is no wobbling or wobbling than conventional ones, resulting in improved stability and durability. In addition, one end of the sensor shoe is pivoted to a pivot point, and the other end is pivoted to a slide member, and the displacement of the sensor shoe is detected by the sensor section via the slide member, so the movement of the sensor shoe This has the advantage of being able to enlarge the image, making it possible to perform highly accurate detection. Moreover, the sensor section can be reduced to one, and the structure is simple. Furthermore, since the sensor shoe on the side opposite to the cutter unit with respect to the rotary cutter is configured to be able to lift one end side pivot portion of the sensor shoe so that it moves away from the steel piece around the other end side pivot portion, Even when the cutter units on two adjacent sides of a steel piece come close to each other, interference between the sensor shoes can be prevented by lifting the sensor shoe and separating it from the steel piece.

[Brief explanation of drawings]

Figure 1 is a configuration diagram showing a conventional example, Figures 2 to 1
Fig. 0 shows one embodiment of the present invention, Fig. 2 is a front view of the flaw removal machine, Fig. 3 is a side view of the same, and Fig. 4 is a front view of the flaw removing machine.
The figure is an enlarged side view of the same main part, Figure 5 is a front view of the sensor device, Figure 6 is a cutaway plan view of the same part, Figure 7 is a sectional view taken along line X-X of Figure 5, and Figure 8 is Partially cutaway side view of the sensor device, Figure 9 is the rear view of the same, Figure 1
Figure 0 is an explanatory diagram of the cutter unit arrangement. 10... Steel piece, 11... Scratch remover body, 18...
Drive roller unit, 19... Driven roller unit, 20... Cutter unit, 33... Rotating cutter, 46... Movable frame, 47, 48...
Sensor shoe, 51, 53, 65...Pivot pin, 54...Rotary actuator, 64...
Slide member, 66...potentiometer.

Claims (1)

[Claims] 1. A cutter unit that moves a cutter having a rotation axis parallel to the surface of the steel billet and along the width direction of the steel billet in the width direction of the steel billet along the surface of the steel billet; An arcuate sensor shoe is disposed on both sides of the cutter in the axial direction of the cutter, and is movable toward and away from the surface of the steel piece, and moves along with the movement of the cutter unit in the width direction of the steel piece; A steel billet flaw removal machine comprising: a sensor section that detects vertical displacement of a steel strip with respect to a steel billet surface; and a control device that controls the cutting depth of the cutter with respect to the steel billet surface by detecting the displacement of the sensor section. In the contact type sensor device, the arcuate sensor shoe has a both-end support structure, one end of which is a rotatably pivoted center portion, and the other end of which is a connecting portion connected to the sensor portion. A contact sensor for a steel flake removing machine, wherein the rotation center is connected to an actuator that holds the rotation center at a predetermined position and moves the rotation center in a direction perpendicular to the surface of the steel piece. Device.