JPH0117366Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vertical stand spindle positioning device in a rolling mill.

Conventional structure and its problems In rolling equipment having vertical rolls, a vertical stand that supports the vertical rolls is raised and lowered as appropriate using a lifting device to align the appropriate caliber of the vertical rolls with the pass line to roll the steel bar. ing. When the caliber wears out, the caliber is reshaped after scraping the outer circumferential surface of the vertical roll, and the vertical rolls are brought closer to each other by the reduced diameter of the vertical roll and connected to the vertical roll. The distance between both spindles has also been narrowed and rolling has resumed. When replacing a discarded roll that has become unusable due to having its outer peripheral surface scraped several times with a new roll, it is necessary to increase the distance between the two universal spindles accordingly.
Conventionally, workers have used cranes, manual jacks, etc. to widen the spacing, but this takes time and effort to adjust the spacing, forcing workers to work excessively.

OBJECT OF THE INVENTION The object of the present invention is to provide a vertical stand spindle positioning device in a rolling mill that overcomes the above-mentioned conventional drawbacks.

Structure of the invention In order to achieve the above object, the vertical stand spindle positioning device for rolling equipment of the invention has the following features:
A vertical stand supporting the vertical rolls is provided, the lower end of each vertical roll is connected to a universal spindle via a coupler, and the appropriate caliber of the vertical roll is aligned with the pass line by raising and lowering the stand by a lifting device. In a rolling equipment for rolling steel bars, a stand fixing device is provided to fix the stand position, and the stand is supported so as to be movable only in the horizontal direction by an elevating frame that protrudes from a suitable position on a universal spindle and is raised and lowered by an elevating device. A guide plate having a pin positioning recess is provided at an appropriate position below the support pin, and a pin guide surface is formed from the upper surface of the guide plate to the recess.

According to this configuration, simply by lowering the universal spindle, the support pin hits the guide surface of the guide plate and is guided into the recess, making it possible to match the spacing between the two spindles to the spacing between the new rolls. be. Therefore, by simply raising the spindle from this state, the coupler can be connected to the lower end of the new roll, and this operation does not require much effort or time and does not require excessive labor on the part of the operator. There's no need to force it.

Embodiment and Operation An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 denotes a stand frame fixed on a foundation, and a guide rail 2 is provided on the side of the stand frame. 3 is an elevating frame, and a vertical part 3A
and a bifurcated receiving shelf part 3B extending horizontally from the lower part of the vertical part 3A, and sliders 4 disposed at the upper and lower parts of both sides of the vertical part 3A are connected to the guide rail 2. It is fitted into the guide groove 2A so as to be able to move up and down. Reference numeral 5 denotes an elevating drive device, which includes a gear box 6 disposed at the upper end of the stand frame 1, and an elevating rod inserted into the gear box 6 so as to be able to rise and fall freely, and whose lower end is connected to the upper end of the vertical portion 3A with a pin 7. 8, and a drive motor (not shown) that raises and lowers the elevating frame 3 via the elevating rod 8 by rotating a pinion 10 that meshes with a rack 9 formed on the elevating rod 8 in forward and reverse directions. Reference numeral 11 denotes a cross-shaped intermediate frame placed on the receiving shelf 3B, and connecting plates 13 having semicircular recesses 12 on the lower surface are fixed to the four corners of the intermediate frame. 14 is a vertical stand placed on the intermediate frame 11, and a pair of vertical rolls 1
5 is rotatably supported. 16 is a caliber formed on the outer peripheral surface of each vertical roll 15; 17 is a pair of universal spindles whose upper portions are inserted into the receiving shelf portion 3B; They are mated. Further, the lower part of the spindle 17 is spline-fitted to the drive shaft. Reference numeral 19 denotes a pair of support pins protruding from the outer peripheral surface of the spindle 17, and reference numeral 20 denotes a rectangular slider disposed at the tip of each support pin 19, which is a notch in the block 21 at the bottom of the receiving shelf section 3B. 22 so as to be movable in the directions of arrows A and B. 23 is a presser bar whose both ends are bolted to the block 21 and closes the upper surface of the notch 22; 24 is a guide plate provided at an appropriate position below the support pin 19; Pin guide surface 2 over concave portion 25
6 is formed. Note that the distance L between the two recesses 25 is made to match the distance L between the new vertical rolls 15. Reference numeral 27 is a stand fixing cylinder disposed on the foundation 29 facing the four corners of the intermediate frame 11, and its piston rod 28 contracts when changing the caliber to allow the vertical stand 14 to move up and down, and roll change. Sometimes, it is extended and fitted into the recess 12 of the connecting plate 13 of the intermediate frame 11 to prevent the vertical stand 14 from lowering.

Hereinafter, the effects of the above configuration will be explained. The state shown in FIG. 1 is a state in which a steel bar 30 is being rolled using the central caliber 16, and when the caliber 16 is worn out as a result of this rolling, the roll chock of the vertical roll 15 must be unclamped. , lift the vertical roll 15, scrape the outer circumferential surface of the vertical roll 15 on a predetermined maintenance stand, re-form the caliber 16, lift the finished vertical roll 15 and insert it into the vertical stand 14, The two vertical rolls 15 are moved closer to each other by a drive device (not shown) in proportion to the reduction in the diameter of the rolls, and the roll chocks are clamped.
In this case, as both vertical rolls 15 move, each slider 20 moves in the direction of arrow B, and the distance between both spindles 17 is also narrowed. If the outer circumferential surface of the vertical roll 15 is scraped several times in this way and it becomes unusable and is to be disposed of, the vertical roll 15 to be disposed of is lifted up and disposed of, and the piston rod 28 of each cylinder 27 is is extended and fitted into the recess 24 of the guide plate 24, fixing the intermediate frame 11 in position and preventing the vertical stand 14 from descending. Next, the lifting frame 3 is lowered by the lifting drive device 5, and both spindles 17 are lowered. Then, as shown by the imaginary line in FIG. 4, the support pin 19 hits the pin guide surface 26 and is guided into the recess 25, the slider 20 moves in the direction of arrow A, the distance between the pins 19 becomes L, and both spindles 17 The spacing between the new vertical rolls 15 is l.
is matched to Next, when the lifting frame 3 is raised and a new vertical roll 15 is inserted into the vertical stand 14, the lower ends of both vertical rolls 15 are fitted into the couplers 18 of each spindle 17. Next, the roll yoke is clamped, the spindle 28 of each cylinder 27 is contracted, and the vertical stand 14 is placed on the shelf 3B of the lifting frame 3 via the intermediate frame 11. Next, the elevating frame 3 is moved up and down appropriately to align the predetermined caliber 16 with the pass line, and rolling of the steel bar 30 is started.

Effects of the invention As described above, according to the invention, by simply lowering the universal spindle, the support pin hits the guide surface of the guide plate and is guided into the recess, and the distance between the two spindles is adjusted to the distance between the new rolls. It is something that can be matched. Therefore, by simply raising the spindle from this state, the coupler can be connected to the lower end of the new roll, and this operation does not require much effort or time and does not require excessive labor on the part of the operator. There's no need to force it.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a view taken along the - arrow in Fig. 1, Fig. 3 is a front view of the main parts, and Fig. 4 is a longitudinal sectional view of Fig. 3. - It is an arrow view. 3... Lifting frame, 5... Lifting drive device, 1
4... Vertical stand, 15... Vertical roll, 16
...Caliber, 17...Universal spindle, 18...Coupler, 19...Support pin, 20...
...Slider, 24...Guide plate, 25...
Recessed portion, 26... Pin guide surface, 27... Stand fixing cylinder, 30... Steel bar.

Claims (1)

[Scope of utility model registration request] A vertical stand supporting the vertical rolls is provided, the lower end of each vertical roll is connected to a universal spindle via a coupler, and the appropriate caliber of the vertical roll is aligned with the pass line by raising and lowering the stand by a lifting device. In a rolling equipment for rolling steel bars, a stand fixing device is provided to fix the stand position, and the stand is supported so as to be movable only in the horizontal direction by an elevating frame that protrudes from a suitable position on a universal spindle and is raised and lowered by an elevating device. Vertical stand spindle positioning in rolling equipment, characterized in that a support pin is provided, a guide plate having a recess for pin positioning is provided at an appropriate position below the support pin, and a pin guide surface is formed from the upper surface of the guide plate to the recess. Device.