JPH0222123Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roll alignment measuring device for a continuous casting machine having an arcuate secondary cooling zone for casting slab materials having a thickness of 200 to 280 mm, for example.

[Conventional technology]

Conventionally, to measure the roll alignment of the continuous casting machine, a ruler formed with a standard radius of curvature was used to measure the roll alignment of the continuous casting machine.
It is common to judge the alignment of the rolls by artificially bringing them into contact with a group of rolls to be measured and detecting the gap between this ruler reference surface and the outer periphery of the rolls, and the device can perform automatic measurements. The reality is that things have not yet been developed.

[Problem that the invention attempts to solve]

Therefore, it is a heavy workload for the measurer to carry out measurements in the hot and humid continuous casting machine during breaks in operation, and high measurement accuracy cannot be expected.

The purpose of the present invention is to provide a quality control device that has excellent measurement accuracy and is easy to manufacture.

[Means for Solving the Problems] The feature of the present invention is that the measurement reference line is a straight line, and its configuration includes a straight frame part that can come into contact with two rolls separated from each other in the first roll group. and,
The frame portion that can come into contact with two separate rolls of the second roll group can be switched between a measurement state in which both frame portions are supported and fixed by the rolls and a non-measurement state in which the interval between both frame portions is reduced. Inside the measuring device main body, which is located in a casting path connected by a telescopic mechanism, the linear distance between the outer periphery of the plurality of rolls of the first roll group while moving on the linear frame is determined. It is equipped with a distance measuring device that measures distances, and its effects are as follows.

[Function] By supporting a linear frame part in contact with two rolls separated by a plurality of rolls and moving a distance measuring device on this linear frame part, a measurement object that is straddled by this linear frame part can be measured. By measuring the linear distance to the outer peripheral edge of the roll, it is possible to detect the amount of displacement (alignment error) of each roll in the radial direction with respect to the first reference line.

Since the measurement reference frame has a linear shape, it is easy to manufacture, and even if strict manufacturing precision is required, it can be done at a sufficiently low cost.

In the measurement state, both frame parts can be brought into elastic contact with the first and second roll groups by the operation of the expansion and contraction mechanism, so the posture of the measuring device body becomes stable and the reliability of the measured values is increased. improves.

[Effect of idea]

As a result, since it is easy to manufacture, it is easy to improve the manufacturing accuracy, and the fact that the measurement posture is stable and the measurement can be performed in accordance with the actual operating conditions, both of which contribute to improving the measurement accuracy. As a result, we have been able to provide a useful quality control device of this type that requires strict measurement accuracy.

〔Example〕

As shown in FIG. 3, there is a tundish 1 that receives the refined molten steel, a mold 2 below the tundish 1, and a tundish 1 that is used to draw out the slab 3 solidified in the mold 2 by pulling it with a dummy bar 4. A first roll group 5 and a second roll group 6 perform rolling straightening on the slab 3, and the dummy bar 4 is installed at the end of the casting path 7 formed by the first roll group 5 and the second roll group 6.
A continuous casting machine includes a dummy bar receiver 8, which is retracted from the casting path 7, and a torch cutter 10, which cuts the continuously cast slab 3 to a required length.

As shown in Figure 1, the radius of curvature R,
The first and second reference lines 11 and 12 having R' are formed into two concentric circular arcs, and the first and second reference lines 11 and 12 are arranged in parallel with the outer peripheral edge of the roll in contact with the first and second reference lines 11 and 12, respectively. The first roll group 5 and the second
A casting path 7 is formed on the opposing inner sides of the roll group 6.

A plurality of caterpillar-shaped rollers that press the first roll group 5 outward are provided on the outer side of the linear frame portion 13 that can come into contact with the two rolls 5A, 5A separated from each other in the first roll group 5. A pressing mechanism 16 configured by urging a flat plate 14 with a spring 15 is also provided. A curved frame part 17 that can come into contact with two rolls 6A, 6A separated from each other in the second roll group 6 from the straight frame part 13 side and the straight frame part 13, and both frame parts 13, 17 are connected to the rolls. 5A, 5A and 6A, 6A, and a non-measuring state in which the interval between both frame parts 13, 17 is expanded and contracted, connected by a pantograph type expansion/contraction mechanism 18 to form a measuring device main body 19. There is. The telescopic mechanism 18 includes a pair of left and right links 20,
20 are interlocked and connected by a screw shaft type connecting rod 21,
This connecting rod 21 is configured to be rotated forward and backward by an electric motor 22 to extend and contract.

Therefore, due to the pressing action of the expansion mechanism 18 on the rolls 5 and 6 that support both frame parts 13 and 17, and the pressing action of the pressing mechanism 16 on the roll 5 to be measured, the distortion of the roll itself and the roll can be reduced. It is possible to measure according to actual operating conditions, taking into account play in the supporting bearings.

A three-row rail 23 with the casting direction as the advancing direction is laid on the linear frame portion 13 formed in the shape of a hollow flat plate in the measuring device main body 19, and a ball screw 24 is driven on the rail 23 to operate the motor 25. Therefore, it is equipped with a laser beam type distance measuring device 26 that runs for measurement, and then from this distance measuring device 26 the rail 2
The image sensor detects the reflected light of the laser beam irradiated perpendicularly to the roll outer periphery 5a, and measures the linear distance h from this device 26 to the roll outer periphery 5a. It is configured.

(Note that the laser beam type distance measuring device 26 has already been filed by the present applicant, and a detailed description thereof will be omitted in Japanese Patent Application No. 58-201526). Also, based on this measured value, it is possible to display the actual roll value graphically as shown in Figure 4, or to display output to an external device such as displaying the difference from the reference value. It is.

As mentioned above, since the measurement uses a laser beam, there are almost no mechanically moving parts, so there is no instability caused by chatter or vibration that is associated with conventional mechanical contact methods. In addition, since the number of measurements per hour can be increased, it is possible to measure the outer circumferential surface of the roll according to its shape, and the shortest distance on the outer circumferential edge of the roll from the straight frame part 13 can be accurately detected.

In addition, since three distance measuring devices 26 are arranged in the direction of the axis of the roll, three measured values are obtained for each roll.
Therefore, it is possible to improve the measurement accuracy, and based on these three measured values, it is also possible to detect the left and right inclination in the axial direction of the roll or the curvature of the roll.

As shown in FIG. 5, an engagement hole 17a into which a roll can be fitted is provided at the tip of the curved frame portion 17, and a hook-shaped hook is provided with elastic force to guide the roll into the engagement hole 17a. A guiding plate 27 is provided to further secure the curved frame portion 17 in the measurement state.

As shown in FIG. 6, a protruding piece 28 having a tapered surface and biased toward the rear is fitted onto the rear end of the straight frame part 13, and the rear end of the straight frame part 13 is attached to the roll to be supported. When the projecting piece 28 comes into contact with the roll 5A located rearward from the roll 5A, the protruding piece 28 is retracted toward the main body due to the guiding action of the tapered surface, and this retracting action causes the linear frame portion 13 to
is a common tangent between the roll 5A to be supported and a plurality of front rolls 5A separated from this roll 5A, and extends over both rolls 5A, 5A.

The measuring device configured as described above is attached to the tip of the dummy bar 4, and the distance measuring device 26 is operated in a measurement state in which the linear frame portion 13 is supported in contact with the first roll below the mold 2, and the distance measuring device 26 is After collecting data, the telescopic mechanism 18 is released and the dummy bar is moved by one pitch of the roll.
Also, collect data for multiple rolls,
By proceeding with the measurements in sequence, a measurement graph as shown in FIG. 4 is obtained. As a result, the envelope of the apex of the roll is determined, and it becomes possible to compare it with a predetermined radius of curvature R, and also to detect the state of protrusion or retraction of each roll with respect to the reference line. However, since the radius of curvature R is about 15m, if the above is kept as is, it will be 1/10
It is difficult to identify whether the alignment is good or bad because it requires measurement accuracy of mm, but the measurement values of individual rolls can be
If only the difference from the reference value calculated in advance and stored in the computer is displayed, it becomes a curve of "difference from the reference value" in the graph of FIG. 4, which is very easy to distinguish.

Next, the formula for calculating the reference value is shown.

The calculated value (distance between the straight frame and the roll) d is: When θ _r ≧ θ _i, d = r ₁ - (r _i - d') When θ _r ≦ θ _i , d = r ₁ - (r _i + d') A=(tanθ _r )R _i cos(θ+α)−R _i sin(θ+α) +R ₁ (sinα−tanθ _r cosα) The contents of each code are as follows.

l ₀ : Straight line representing the surface in contact with the rolls at both ends l ₁ : Center of roll 1 and roll 2: Straight line passing through O ₁ , O _o l ₂ : Straight line passing through center O ₁ and parallel to l ₀ l _i : Roll 1 , center of roll (i): O ₁ , straight line passing through O _i θ _s : Angle between straight line l ₁ and the X axis θ _d : Angle between straight line l ₁ and straight line l ₂ θ _r : Straight line l ₀ (or l ₂ ) with the X-axis (=θ _s + θ _d ) θ _i : Angle between the straight line l _i and the X-axis r ₁ , r _i , r _o : Radius of rolls 1, i, and n d′: Center O _i and l ₂ distance d: Distance between rolls i and l ₀ R ₀ = 105000 mm [Another embodiment] (a) The distance measuring device 26 may be a non-contact type using microwaves, or it may have a conventional configuration. A contact arm type may also be used.

(b) As the expansion/contraction mechanism 18, a pneumatic, hydraulic, or other liquid pressure cylinder may be used.

(c) A hydraulic cylinder may be used as the drive mechanism for the distance measuring device 26.

(d) The manufacturing accuracy of the rail 23 is made to be strict and is used as a standard for measurement.
A piano wire may be strung along with the instrument, and this piano wire may be used as a reference during measurement.

(e) As shown in FIG. 8, in the above embodiment, a set of a laser transmitter and an image sensor are incorporated in the distance measuring device 26 to perform measurement irradiation onto the first roll group 5. A set of a laser transmitter and an image sensor is incorporated, and this set simultaneously measures the distance to the second roll group 6, and the first roll group 5 arranged in correspondence with each other from the first roll. It may be configured such that the roll interval with the second roll group 6 can be measured simultaneously.

(f) The pressing mechanism 1b may not be used for simple measurements.

Although the embodiments described above are intended for curved continuous casting machines, a measuring device capable of measuring roll alignment and roll spacing that can be applied to vertical continuous casting machines will be described.

As shown in Figure 9, the refined molten steel ladle 2
A tundish is received from the tundish 9, a mold 2 is placed below the tundish 1, and a first roll group 30 and a second roll group arranged vertically are used to roll and straighten the slab 3 solidified in the mold 2 while pulling it downward.
Roll group 31, gas cutting device 3 below the roll groups 30, 31 that cuts the slab 3 to the required length.
2. A turning device 34 that reversely transfers the cut slab 3 onto a horizontal carry-out roll conveyor 33.
A vertical continuous casting machine is constructed.

As shown in FIGS. 10 to 13, the first,
Laser beam type distance measuring devices 3b, 3b are suspended and supported by cylinders 37 in a vertically movable manner within a main body frame 35 having a thickness corresponding to the roll interval of the second roll group 30, 31;
A roll pressing piece 39 with an engaging recess 39A capable of coming into contact with the roll groups 30, 31 is provided at the bending fulcrum position of the pantograph-shaped link mechanism 38, and a pair of upper and lower drive cylinders 40, 4 are provided at other fulcrums.
A measuring device capable of measuring roll spacing and roll alignment is constructed by equipping a jacking mechanism 41 with 0s connected in series, and by installing a pair of left and right sled bodies 42 on both sides of the roll side of the main body frame 35.

As shown in FIG. 12, a He-Ne laser generator 43 irradiates a laser beam toward the roll, and image sensor cameras 44 with built-in image sensors that receive reflected light from the laser beam are arranged symmetrically on the left and right, respectively. A distance measuring device 36 is configured to measure the distance to the first roll group 30 and the second roll group 31.

As shown in FIGS. 14 and 15, the measuring device is suspended and supported by a wire from a trolley 45 located above the mold 2, and is inserted between the first roll group 30 and the second roll group 31. hand,
The distance between the pair of opposing rolls 30A and 31A measured by the distance measuring devices 36 and 36, respectively.
A roll distance measuring device is configured to measure the total value of X ₁ and X ₂ . Since the measurement points are set at two locations in the direction of the roll axis, measurement accuracy is improved and the inclination of the roll in the direction of the axis can also be measured.

As shown in FIGS. 16 to 18, the trolley 4
A reference line 47 such as a piano wire is connected to a fixing device 46 provided below the roll groups 30 and 31 while passing through the main body frame 35 of the measuring device from 5 to 5.
At the same time, as shown in FIG. 20, a light source 59 irradiates parallel rays to this reference line 47 within the measuring device main body, and the reference line 47 illuminated by this parallel ray is detected as a shadow. Equipped with a detection section equipped with an image sensor 60,
While being supported and fixed between the rolls by the jacking mechanism 41, the distances X ₁ and X ₂ from the range finder 36 to the rolls, the reference line 47 and the range finder 3
Measure the amount of positional deviation ΔX from 6, and calculate X ¹ of each roll.
+ΔX (X ₁ - ΔX) is sequentially plotted and compared to detect the quality of the alignment of the first roll group, and from X ₂ - ΔX (X ₂ + ΔX) to detect the quality of the alignment of the second roll group. It is set as.

(G) A roll spacing/roll alignment measuring device as shown in FIG. 19 may be used for the vertical continuous casting machine. In other words, a pantograph-shaped link mechanism is installed in a main body frame 53 equipped with detection cases 52 on the left and right sides, which are equipped with a detection case 52 that houses a laser beam distance measuring device 36 and a reference line 47 detection section, which are suspended and supported by a suspension wire 51 from a trolley 45. A roll pressing piece 55 with an engaging recess 55A that can come into contact with the roll groups 30 and 31 is provided at the waist bending fulcrum position of 54, and one end of a support shaft 56 is screwed together at the connection point of the link mechanism 54. A jacking mechanism 58 is installed by interlocking an electric motor 57 to the upper plate 52A of the main body frame 53, and while the detection case 52 is lowered while being supported in contact with the upper plate 52A of the main body frame 53, it is stopped at the measuring roll position and a jacking mechanism is installed. 58 is activated, and during this time the detection case 52 descends due to the loosening of the hanging wire 51 and contacts the bottom plate 52B of the main body frame 53, and then is pulled up again by the tensioned wire 51 and contacts the upper plate 52A. move within the main body frame 53 so as to
The configuration is such that measurement is performed while the detection case 52 is moving. That is, in this case, since the detection case 52 and the jacking mechanism 58 are mechanically separated, the influence on measurement accuracy can be suppressed.

[Brief explanation of the drawing]

The drawings show an embodiment of the roll alignment measuring device for continuous casting equipment according to the present invention, and FIG. 1 is an overall front view, FIG. 2 is an overall plan view, and FIG. 3 is a side view of a curved continuous casting machine. Figure 4 is a graph showing the measurement status, Figure 5 is an enlarged view showing the shape of the tip of the curved frame part, Figure 6 is a vertical cross-sectional view showing the rear end of the straight frame part, and Figure 7 is the theoretical formula and theoretical values. A diagram to guide you,
Fig. 8 is a front view showing a state in which the roll interval can be measured, Fig. 9 is a side view of the vertical continuous casting machine, Fig. 10 is a front view showing the measuring device for the vertical continuous casting machine, and Fig. 11 is Fig. 10 is a side view, Fig. 12 is a plan view showing the ranging state, Fig. 13 is a side view showing the jacking mechanism,
FIG. 14 is a side view showing the roll distance measurement state, FIG. 15 is a plan view in FIG. 14, FIG. 16 is a side view showing the roll alignment measurement state, and FIG.
The figure is a front view of Fig. 16, Fig. 18 is an enlarged plan view of Fig. 16, Fig. 19 is a perspective view showing another embodiment of Fig. 10, and Fig. 20 is a state in which the deviation from the reference line is measured. FIG. 5...First roll group, 6...Second roll group, 5
a... Outer periphery, 5A, 6A... Roll, 7... Casting path, 11... First reference line, 12... Second reference line, 13... Straight frame portion, 16... Pressing mechanism, 17... ... Curved frame part, 18 ... Telescopic mechanism, 19 ... Measuring device main body, 26 ... Distance measuring device,
h...straight line distance.

Claims (1)

[Claims for Utility Model Registration] While moving within the casting path 7 formed by the first roll group 5 and the second roll group 6 arranged in parallel along the first and second reference lines 11 and 12, the 1 reference line 11
In a roll alignment measurement device that detects the amount of displacement in the radial direction of each roll 5 relative to the roll 5, a linear frame portion 13 that can come into contact with two rolls 5A, 5A separated from each other in a first roll group 5.
and a frame portion 17 that can come into contact with the two rolls 6A, 6A separated from each other in the second roll group 6.
A, 5A and 6A, 6A are connected to each other by a telescoping mechanism 18 that can switch between a measurement state in which the frame parts 13 and 17 are supported and fixed, and a non-measurement state in which the distance between the two frame parts 13 and 17 is reduced. A roll of continuous casting equipment that is equipped with a distance measuring device 26 that moves on a straight frame part 13 and measures the straight distance h from the outer peripheral edge 5a of a plurality of rolls 5 of a first roll group 5. Alignment measuring device. The roll alignment measuring device according to claim 1, wherein the distance measuring device 26 is a laser beam type distance measuring device. The roll alignment measuring device according to claim 1, wherein the linear frame portion 13 includes a pressing mechanism 16 that presses the rolls 5 of the first roll group toward the outside of the casting path 7.