KR20040017022A - An apparatus for measuring spring tension and assembling the spring - Google Patents

Abstract

PURPOSE: A spring assembling apparatus capable of measuring tension of a spring is provided to check malfunction of equipment by measuring an elastic coefficient of the spring while assembling the spring. CONSTITUTION: A spring assembling apparatus measures characteristic values of a roll gap adjustment spring used in a segment of equipment. A hydraulic actuator(30) is mounted on a base frame(5) having a predetermined size. A sensor(40) is provided at a lower end of the hydraulic actuator(30) so as to measure a displacement of a rod(34) of the hydraulic actuator(30). A load cell(20) is mounted on an upper cover(10) of the hydraulic actuator(30) in order to detect tension of the roll gap adjustment spring. The displacement of the rod(34) detected by the sensor(40) is used as a spring constant.

Description

Spring tension measuring and assembly device {AN APPARATUS FOR MEASURING SPRING TENSION AND ASSEMBLING THE SPRING}

The present invention relates to a device for measuring and assembling a characteristic value of a roll gap adjustment spring used for a segment of a performance equipment, and more particularly, a segment roll gap adjustment spring and a segment column spring in a performance process. The present invention relates to a spring tension measurement and assembly device capable of measuring and assembling characteristics.

In general, the playing process is to secure the internal or external quality of the slab produced by varying the cooling method and determining the casting speed according to the type of molten steel in the casting equipment of the molten steel refined in steelmaking, It is cut to the proper length and sent to the hot rolling mill.

As shown in FIG. 1, the performance facility 200 casts the slab 230 according to the demand (width, thickness) of molten steel injected from the tundish 210 into the mold 212. In addition, the slab 230 leaving the mold 212 is guided by the plurality of curved segments 240 at the lower side of the mold 212 and cooled to become a finally solidified slab.

This playing process, as shown in the enlarged view in Figure 1, looking at the components of the segment (SEGMENT) 240, each having an upper frame (FRAME) 242a and a lower frame (242b) facing each other And a plurality of upper and lower rolls 250 mounted rotatably between the pillars COLUMN 243 and the frames 242a and 242b for fixing them.

Here, the upper and lower rolls 250 are adjusted to a suitable thickness as the slab 230 passes therebetween by adjusting the width therebetween to produce a finished product. As such, when the upper and lower rolls 250 assembled to the frames 242a and 242b reduce the width therebetween, the slab 230 passes between them, thereby reducing the slab thickness.

In this segment 240, a disk spring (260) is mounted on the screw shaft (not shown) and the column (COLUMN) 243, respectively, these disk springs 260 are segment equipment in an abnormal state There are about 1200 sets in the entire performance equipment.

Looking in more detail with respect to the spring 260 mounted to the segment 240 in Figure 2 as follows. Each of the springs 260 is composed of two types, one of which is shown in FIG. 2A, and the coil spring 260 is fixed under the column 270 of the screw jack (not shown). It is assembled in the form, and the spring fixing washer (262) and the fixing nut (nut) (264) is mounted on the lower portion of the spring 260 is assembled with a constant force. Therefore, such a structure is that the impact applied to the upper and lower roll 250 is absorbed by the buffer action of the spring 260.

And, yet another form of this is as shown in Figure 2b), the spring pack 280 is assembled on the top of the column (column) 243, the disk spring 260 is built, the fixing for the top The spring pack 280 is fixed by the nut 282.

Therefore, when the spring 260 is assembled in a state in which the tension of the spring is excessively increased to the segment 240 of the player, the segment 240 is caused by an external shock transmitted through the roll 250. Damage to the frames 242a, 242b and the rolls 250, etc. occurs. On the contrary, when the springs are assembled in a state where the tension of the springs 260 is reduced, the external force (iron static force) due to the slab is overcome. As a result, the gap between the upper and lower rolls 250 of the segment 240 is widened, which has a fatal effect on the standard quality of the slab that is a product.

Therefore, as described above, the springs 260 mounted on the pillars of the segment 240 have a great influence on the quality of the performance equipment and the product, so that the tension is more precisely adjusted. There is a need to assemble.

3 shows a conventional spring tension measuring apparatus 300.

The conventional spring tension measuring device 300 is taken out of the spring pack (280) separately from the pillar 243, and then from the spring compression bolt 302 provided in the spring tension measuring device (300) After removing the nut 304, a spring pack 280 is mounted on the bolt 302, and a hydraulic jack 310 is mounted on the bolt 302.

Then, a spring compression nut 304 is attached to the upper end of the bolt 302, and then the hydraulic pressure pump 312 is used to supply hydraulic pressure to the hydraulic jockey 310 to thereby apply the spring pack 280. Compress.

Then, when the constant pressure calculated using the pressure gauge 314 installed in the mobile hydraulic pump 312 to compress the spring 260 with the set force is reached, the hydraulic pump 312 is stopped and the spring pack 280 Assembling the bolts 284 in the holes 282a provided in the flange 282 of the spring pack 280 while maintaining the tension.

However, the conventional method as described above does not directly check the force acting on the spring pack 280, the operator has a low accuracy by working while looking at the pressure gauge 314 installed in the hydraulic pump 312, There is a problem that the deviation is not so severe compression force is not constant.

In addition, since the spring constant indicating the current state of the spring 260 cannot be measured, the exact physical characteristics of the spring 260 cannot be detected.

The present invention has been made in order to solve the problems of the prior art as described above, by measuring the spring elastic modulus during the assembly operation can be confirmed whether there is an abnormality of the installation, and also reduce the work deviation between the workers that can occur during the assembly operation repair work The purpose of the present invention is to provide an improved spring tension measuring and assembling device to maintain a constant quality of the product and to improve productivity by reducing working time during assembly work.

1 is an explanatory diagram showing a general continuous casting facility and a segment device;

2 is a detailed view showing the springs provided in the segment apparatus of the continuous casting equipment,

a) when the spring is mounted on the pillar of the screw shaft,

b) in the form of a spring pack;

3 is an exemplary view of a spring tension measuring device according to the prior art,

a) a perspective view of the drawing, b) a sectional view of the main portion;

4 is a perspective view showing a spring tension measuring and assembling apparatus according to the present invention;

5 is a state diagram of the spring tension measurement and assembly device according to the invention, the spring

Partial cutaway perspective view illustrating a situation of detecting a spring constant in a pack type;

6 is a state diagram of the spring tension measuring and assembling apparatus according to the present invention, the column

As an explanatory diagram showing a situation of detecting the spring constant of the mounted type.

a) a partially cutaway perspective view, b) a sectional view;

7 is a hydraulic actuator equipped with a spring tension measuring and assembling apparatus according to the present invention.

Detailed cross section of the.

<Description of the symbols for the main parts of the drawings>

1 ..... Spring tension measuring and assembly device

5 ..... Base frame 10 ..... Cover

16 .... Height adjustment screw 20 ..... Load cell

30 .... Hydraulic Actuator 32 .... Hydraulic Pump

40 .... Distance measuring sensor 45 .... Stator

47 .... 60 .... Controller

64 .... Electronic display 70 .... Auxiliary cover

72 .. Support plate 74 .... Support rod

76 .... Bottom 200 .... Performance Equipment

210 ... Tundish 212 ... Mold

230 ... slab 240 .... curved segment

242a, 242b ... Frame 250 .... Upper, Lower Roll

In order to achieve the above object,

The present invention is a device for measuring the characteristic value of the spring for the roll gap adjustment used in the segment of the performance equipment, the hydraulic actuator is mounted on a base of a predetermined size, the lower end of the hydraulic actuator rod length displacement of the hydraulic actuator And a load cell is mounted on an upper cover of the hydraulic actuator so that the tension of the spring is detected in the load cell by the operation of the hydraulic actuator, and the displacement of the rod is detected in the sensor to detect the spring constant. By providing a spring tension measuring and assembling apparatus characterized in that configured to be.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Spring tension measuring and assembling apparatus 1 according to the present invention has a base frame 5 having a c-shaped cross-sectional structure, as shown in Figure 4, the cover 10 for fixing the spring pack 280 on the top Is fixed by bolts 12.

In addition, a screw hole 14 is formed at the center of the cover 10, a height adjusting screw 16 is screwed to the screw hole 14, and a load cell 20 is disposed on a lower surface of the height adjusting screw 16. ) Has a fixed structure.

In addition, a hydraulic actuator 30 is mounted on the upper surface of the base frame 5. The hydraulic actuator 30 is composed of a hydraulic jack (Hydrolic Jack) is connected to the hydraulic pump 32 receives the fluid to generate the hydraulic pressure. The hydraulic actuator 30 has a distance measuring sensor 40 attached to the lower portion thereof to detect and inform an operation distance of the rod 34 when the actuator 30 operates, and thus the rod 34 of the actuator 30 is attached to the hydraulic actuator 30. Check the exact distance of movement.

As shown in cross section in FIG. 7, the sensor 40 has an elongated groove 34a formed at the center of the lower surface of the rod 34, and a stator 45 extending from the sensor 40 at an inner side thereof. Is positioned, and a mover 47 fitted to surround the stator 45 is attached to the lower surface of the rod 34.

Therefore, when the rod 34 moves up and down, the mover 47 mounted on the rod 34 moves on the stator 45, and the sensor 40 moves on the stator 45. The positional movement of the rod 34 is detected by detecting the positional movement of 47.

In addition, the hydraulic pump 32 and the sensor 40 are each electrically connected to the controller 60 is connected to transmit and receive a signal.

Looking in more detail with respect to the hydraulic actuator 30 in Figure 7, a piston rod (34) is installed in the cylinder tube (31), the piston rod 34 is a hole for supplying hydraulic oil Oil is supplied from the hydraulic pump 32 installed in the lower part of the frame 5 through the 34a and 34b.

Then, when oil is supplied through the lower hole 34b, the rod 34 is pushed upwards, and the sensor 40 installed at the lower portion of the rod 34 by the distance pushed up in this way is provided with the rod 34. Measure the displacement.

In addition, the upper cover 10 includes a load cell 20 for measuring a load applied to the spring 260, and a controller 60 electrically connected thereto. ) Is provided with an electronic display device 64 or the like for displaying various measured data.

Spring tension measurement and assembly device 1 according to the present invention configured as described above, when using the device to check the tension of the spring 260 first, as shown in Figure 5, the upper portion of the base frame (5) A spring pack 280 that is a workpiece is mounted on the hydraulic actuator 30 installed at the upper side of the rod 34.

When the hydraulic pump 32 is operated, the rod 34 portion of the actuator 30 is raised and a force is applied to the spring pack 280. Then, when the upper surface of the spring pack 280 is in contact with the load cell 20 and the force is detected in the load cell 20, the hydraulic pump 32 is stopped.

Next, after disassembling all the bolts 284 that couple the flanges 282 of the spring pack 280, and then operating the hydraulic actuator 30 again, a force is applied to the spring 260, the length of the spring 260 Is reduced, and the reduced length is detected by the sensor 40 and displayed on the electronic display 64 of the controller 60.

When the tension of the spring 260 and the reduced length of the spring is measured, the tension of the spring, as well as the exact force applied to the spring 260 can be measured, and the correct spring constant can be measured. Therefore, when the tension is reduced by comparing the inherent tension of the spring 260 does not act as a spring, the spring is discarded.

In addition, when the spring constant of the spring 260 is good and can still be used, the spring is pressed to maintain a predetermined tension, and if the tension is maintained, the flanges 282 of the spring pack 280 Fixing bolts 284 and nuts 284a mounted on the spring pack 280 maintains the adjusted tension, and operates the hydraulic pump 32 so that the hydraulic actuator 30 is lowered. Thus, the forces applied to the spring pack 280 are removed and the spring pack 280 is maintained at a tension suitable for use.

Next, the spring tension measuring and assembling apparatus 1 of the present invention is used as a method for assembling the spring 260 to the pillar 270 of the screw jack. Looking in detail with respect to the spring 260 assembled to the pillar 270 of the screw jack, the disk spring 260 is assembled to the lower portion of the pillar 270, the spring 260 is a nut 264 at the bottom thereof Using the washer 262, the tension is adjusted and assembled differently depending on the type of the segment 240.

When assembling the spring 260 to the pillar 270 using the apparatus 1, this is a natural state nut 264 by assembling the spring 260 to the pillar 270, as shown in FIG. After assembling), the entire column 270 is fixed to the spring tension measurement and assembly device 1 of the present invention.

At this time, the upper cover 10 provided in the spring tension measuring and assembling apparatus 1 of the present invention is a U-shaped groove 11 is processed to the top of the cover to assemble the pillar 270, the pillar ( 270) The installation can be simplified by inserting the groove 11 into the groove 11 without disassembling the top cover 10. In addition, a load cell 20 is mounted on an upper portion of the hydraulic actuator 30 installed in the frame 5, and an auxiliary cover supporting and pushing up the spring 260 through a washer 262 on the upper portion of the load cell 20. 70 is installed.

As shown in the enlarged view in FIG. 6b), the auxiliary cover 70 has a structure in which an upper surface forms a round annular support plate 72 and a lower bottom 76 is formed through a plurality of support rods 74. Thus, the auxiliary cover 70 is the annular support plate 72 supports the washer 262, the bottom surface 76 is placed on the load cell 20, when the installation is completed, the hydraulic pump 32 By actuation, the rod 34 of the hydraulic actuator 30 is raised, and when the spring 260 starts to receive force, the force and distance appear on the electronic display 64. After adjusting the tension of the spring 260 in this manner, tighten the nut 264 screwed to the lower end of the pillar 270 through the space between the support rod 74, the tension adjustment of the spring 260 is completed. do.

According to the present invention as described above, in the tension check and adjustment of the spring 260 of the segment spring device, the hydraulic actuator 30 in which the length sensor 40 is built, and the load cell 20 capable of measuring the tension Since the inspection of the spring 260 using, it is possible to improve the accuracy of the inspection operation, there is an advantage that can accurately determine the life of a large amount of spring 260.

In addition, it is possible to maintain the quality of the repair work by reducing the work deviation between workers that can occur during spring assembly work, and to improve the productivity by reducing the working time during the assembly work is achieved.

In the above description, the technical idea of the measuring and assembling apparatus of the spring 260 provided in the segment apparatus 240 has been described together with the specific accompanying drawings, but such a structure exemplifies a preferred embodiment of the present invention. It is apparent that the above description is not intended to limit the invention to the above.

Claims (4)

In the apparatus for measuring the characteristic value of the roll gap adjustment spring 260 used for the segment 240 of the performance equipment, a hydraulic actuator 30 is mounted on a base frame 5 of a predetermined size, and the hydraulic actuator ( The lower end of the 30 is provided with a sensor 40 for detecting the displacement of the rod 34 length of the hydraulic actuator 30, the load cell 20 is mounted on the upper cover 10 of the hydraulic actuator 30 The tension of the spring 260 is detected in the load cell 20 by the operation of the hydraulic actuator 30, the displacement of the rod 34 is configured to be detected in the sensor 40 to detect the spring constant Spring tension measuring and assembly device. According to claim 1, wherein the sensor 40 has a long groove (34a) is formed in the center of the lower surface of the rod 34, the stator 45 extending from the sensor 40 is located on the inner side, A mover 47 fitted to surround the stator 45 is attached to the lower surface of the rod 34, When the rod 34 moves up and down, the mover 47 mounted on the rod 34 moves on the stator 45, and the sensor 40 moves on the stator 45. Spring tension measuring and assembling apparatus, characterized in that configured to detect the position movement of the rod (34) by detecting the position movement of the. The U-shaped groove 11 is processed in the upper cover 10 provided in the base frame 5 so that the pillar 270 can be directly assembled, and the pillar 270 is grooved. It can be installed simply by disassembling the upper cover 10 without disassembling, the spring tension measurement and assembly, characterized in that the load cell 20 is mounted on the upper portion of the hydraulic actuator 30 installed in the frame (5) Device. According to claim 3, The load cell 20 is provided with an auxiliary cover 70 for supporting and pushing up the spring 260 through the washer 262, the auxiliary cover 70 is rounded on its upper surface An annular support plate 72 is formed, and a bottom surface 76 is formed through a plurality of support rods 74. The auxiliary cover 70 supports the washer 262 by the annular support plate 72. And, the bottom 76 is a spring tension measuring and assembling apparatus characterized in that the structure placed on the load cell (20).