JPH0726050U - Continuous casting mold inner diameter measuring device - Google Patents

Abstract

(57) [Summary] [Object] To provide an apparatus for automatically measuring the inner diameter of a continuous casting mold in the longitudinal direction. [Structure] At least a pair of opposite distance measuring devices installed in a structure movable in the longitudinal direction in a mold by a plurality of straight rods and a rod with a screw driven to rotate, and the inner diameter of the mold from the measurement information of the devices. An apparatus for measuring the inner diameter of a casting mold for continuous casting, which comprises: [Effects] The conventional manual measurement, which requires a long time and is prone to error, can be accurately measured in a short time by mechanization and automation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for automatically measuring the inner diameter of a mold used in continuous casting in the longitudinal direction of the mold.

[0002]

[Prior art]

 The mold in the continuous casting device usually deforms due to wear of the inner wall surface and heat load due to contact with the slab, and the predetermined surface shape collapses. Since it has a large impact on equipment accidents and product quality, it is necessary to periodically measure and inspect the inner wall surface of the mold to determine the life of the mold.

In the conventional method, an inspector inserts a cylinder gauge into the mold after it has been used for casting, and the inner direction of the mold is directed from the upper direction to the lower direction at a predetermined interval. Was measured by. Then, the measured value is generally compared with the initial value and manually calculated, and the deterioration situation is judged according to the management standard.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional method, the manual measurement by the inspection worker requires a long time, and further, especially in the case of a curved mold, there is a problem that a measurement error is likely to occur due to the complexity of the inner surface shape.

In view of such circumstances, an object of the present invention is to provide an inner diameter measuring device capable of automatically measuring the inner method of a continuous casting mold in a short time with high accuracy.

[0006]

[Means for Solving the Problems]

 The present invention is a device for measuring the inner diameter of a casting mold for continuous casting, comprising a pedestal detachably mounted on the end face of the mold, one end fixed to the pedestal and the other end fixed to a fixed plate. A plurality of parallel rods each parallel to each other, a threaded rod parallel to the straight rod, one end of which is connected to a drive unit described later and the other end of which is supported by the fixing plate, and the threaded rod is rotationally driven. The drive rod installed on the mount, the shaft support into which the straight rod is slidably inserted, and the fixed nut portion for the threaded rod are provided, and the rod with the screw that rotates is driven. And a structure movable in the longitudinal direction in the mold, at least a pair of opposite distance measuring devices installed in the structure for measuring the mold inner diameter, control means for controlling the driving device, and the distance measurement Information that is electrically connected to the measuring instrument and the driving device and is measured by the distance measuring instrument. Type a continuous casting mold internal diameter measurement device comprising that you consisting output calculating means obtains a predetermined measurement result.

Here, the distance measuring device is not limited to its model, and for example, a laser type or ultrasonic type distance measuring device is applied. In addition, at least a pair of opposite distance measuring devices for measuring the inner diameter of the mold may be used in a pair when measuring the distance between one location on both surfaces of the inner surface of the mold, and, for example, a square slab. When the inner diameters in the vertical and horizontal directions are simultaneously measured with the casting mold, or when the inner diameters at a plurality of locations of the round cast slab are simultaneously measured, a plurality of pairs are installed accordingly. Then, the inner diameter of the mold is measured continuously or at desired intervals in the longitudinal direction of the casting mold by a distance measuring device movable in the casting mold in the longitudinal direction.

[0008]

[Action]

 As described above, at least a pair of opposite distance measuring devices for measuring the inner diameter of the mold were installed in the structure movable in the longitudinal direction in the mold by the driving device, so that the inspector was no longer in the mold. It is not necessary to insert a cylinder gauge, and the inner diameter of the mold can be measured automatically in a short time with high accuracy.

Furthermore, a calculation means is connected to the distance measuring device and a driving device for moving the device in the mold in the longitudinal direction, and the measurement information from the distance measuring device is input to obtain and output a predetermined measurement result. Since it is configured as above, the manual calculation for comparing the measured value with the initial value and judging the deterioration condition according to the control standard is no longer required, and the desired taper rate change of the inner surface of the mold and local wear Alternatively, the deformation status and the like can be automatically grasped, and the deterioration status can be automatically judged according to the management standard by comparing with the initial value.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing the entire apparatus of an embodiment related to the present invention. Reference numeral 1 is a curved mold for square slab casting, and 2 is a pedestal that is detachably fixed to the upper surface of the mold 1. The pedestal 2 has the other end fixed by a fixing plate 3 below the mold 1, and four straight rods 4 penetrating through the mold and arranged at the four corners of the square, which are parallel to each other. . At the center of these four straight rods 4, a threaded rod 6 connected to a drive device 5 mounted on the upper part of the base 2 and the other end of which is supported by a fixed plate 3 is arranged.

The driving device 5 rotates the rod 6 with a screw, and in this embodiment, a pulse motor is adopted. Further, the threaded rod 6 is for freely moving the structure 7 described later in the longitudinal direction in the mold, and in this embodiment, a ball screw is adopted. The structure 7 has a shaft supporting portion into which the four straight rods are slidably inserted, and a fixing nut portion for the threaded rod 6, and the four straight rods 4 always connect the straight rods 4 to each other. While maintaining a right angle posture, it moves vertically in the mold vertically by a threaded rod that rotates in a fixed nut. Here, in this embodiment, a ball nut is used as the fixed nut. In the structure 7, four distance measuring devices 8 are installed so as to look into the approximate center of each inner surface of the casting mold 1 for casting square slabs.

FIG. 2 is a bird's-eye view showing the arrangement of the distance measuring device 8 in the mold. In the present embodiment, a laser system is adopted as the distance measuring device, and the measuring device 8 is arranged so that the measuring lines of the two measuring devices facing each other are slightly shifted due to the restriction of the small surface mold.

Each distance measuring device 8 measures the distance between the distance measuring device and the inner surface of the mold, and the inner diameter between the respective surfaces is obtained by adding the distance between the measuring devices for two facing surfaces which is known in advance. Will be Further, when it is desired to measure the surface state of only one surface, the above-mentioned addition processing is not necessary and it is sufficient to use the measurement information from one distance measuring device.

FIG. 3 is a flowchart of the device configuration. The device configuration is roughly divided into a sensor section and a control unit section. The sensor unit consists of a sensor, which is a distance measuring device, and a pulse motor, which is a driving device. The control unit section drives and controls the display unit that converts and displays the signal from the sensor, the input section that inputs the signal after converting the signal from the sensor, the pulse motor, and the rotation history of the motor. Input the pulse motor drive part, the initial value of the inner surface of the mold, the control reference value, and output the measurement result. The connection part with the external information processing device (PC) and the measured distance information. And an actual state of the inside of the mold in the longitudinal direction from the rotation record of the pulse motor, and a calculation unit for determining the deterioration state by comparing and collating with the initial value and the control reference value. The external information processing device (personal computer) is a floppy disk insertion type, and the measurement and judgment results are written to this floppy disk and the form is output by a printer (not shown) provided separately.

With the apparatus of this example, the inner method of a curved mold having a radius of curvature of 12 m and a length of 900 mm for casting a slab of 170 mm square was measured. Using the corners of the four surfaces of the mold and the substantially central portion as the measurement points, the inner and inner methods of the inner surface of the mold were simultaneously measured at a pitch of 100 mm in the longitudinal direction to determine the taper ratio of the inner diameter of the mold.

The time required for measurement and data calculation was about 1/8 of the time required for conventional manual work. In addition, by using the laser type distance measuring device, the minimum unit of measurement was 0.01 mm.

[0017]

[Effect of device]

 With the present invention, it is possible to automatically and accurately measure the inner surface shape and wear condition of the continuous casting mold in a short time, and it is possible to stabilize the operation and quality in continuous casting and save labor, which is extremely useful in industry. Is.

[Brief description of drawings]

FIG. 1 is a side view showing an entire embodiment of the present invention.

FIG. 2 is a bird's-eye view showing the arrangement of the distance measuring device in the mold according to this embodiment of the present invention.

FIG. 3 is a diagram showing a device configuration flow of an embodiment of the present invention.

[Explanation of symbols]

 1 Continuous casting mold 2 Frame 3 Fixing plate 4 Straight rod 5 Drive device (pulse motor) 6 Threaded rod (ball screw) 7 Structure 8 Distance measuring device (laser method)

Claims (1)

[Scope of utility model registration request] 1. An apparatus for measuring the inner diameter of a continuous casting mold, comprising a gantry removably installed on an end surface of the dies, one end fixed to the gantry and the other end fixed to a fixed plate. A plurality of parallel rods parallel to each other, one end of which is connected to a drive unit described later and the other end of which is supported by the fixing plate, a threaded rod parallel to the straight rod, and the threaded rod being driven to rotate. In a mold with a driving device installed on the gantry, a shaft supporting portion into which the straight rod is slidably fitted and a fixed nut portion for the threaded rod, and a straight rod and a threaded rod that is rotationally driven. A structure movable in the longitudinal direction, at least a pair of opposite distance measuring devices installed in the structure for measuring the inner diameter of the mold, control means for controlling the driving device, the distance measuring device and the drive It is electrically connected to the device and inputs measurement information from the distance measuring device. An apparatus for measuring the inner diameter of a casting mold for continuous casting, which comprises a calculating means for applying a force to obtain and output a predetermined measurement result.