JPS64121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a configuration of a compact rolling mill that fully retains the original rolling function, enables both horizontal and vertical operation, and is suitable for easy conversion of the horizontal and vertical positions. Regarding.

In continuous rolling mill lines for bars and long steel, the continuous arrangement of the rolling mills is specified by the shape of the product to be rolled, and requires alternating or intermittent arrangement of horizontal and vertical stands. . Therefore, in order to roll a wide range of products on a rolling mill line with a minimum number of stands, it is necessary to have an equipment configuration that allows the arrangement order of both horizontal and vertical stands to be changed easily and within a short time. This is desirable.

This is a well-known problem, and many solutions have been proposed in the past. However, in both cases, the rolling mill itself is large, so the horizontal and vertical conversion equipment is also large and complex, and the conversion operation also takes a relatively long time.

The purpose of the present invention is to maintain a configuration that can operate in both horizontal and vertical operating positions, and to be small and lightweight so that conversion to both horizontal and vertical operating positions is extremely easy using existing equipment such as a crane. It is an object of the present invention to provide a rolling mill having a structure that is flexible and has a high rolling precision.

Therefore, the present invention relates to the structure of a rolling mill, and features the following configuration. That is, a pair of work rolls forming a pass line, two parallel spindles that fixedly support each of the work rolls in a cantilevered manner on their respective ends, and a pinion stand that interlocks the respective spindles. In the rolling mill, the pinion stand is made up of two pinion gears that mesh with each other, and the one pinion gear is formed with a hole along the axis, and the one spindle is connected to the hole. By connecting the pinion stand in a flexible manner so as to pass through the pinion stand, the dimensions of the rolling mill in the axial direction of the spindle can be shortened and the size can be reduced, and the weight of the pinion stand can also be reduced.
Further, a work roll spacing adjustment mechanism comprising a forced pressure device that constantly applies a force to the one spindle in a direction perpendicular to its axis, and a wedge that can be moved and adjusted along the direction of the force applied by the forced pressure device. By including the work roll spacing, the work roll spacing adjustment mechanism can be simplified, resulting in a reduction in size and weight, and this structural feature, together with the function of the flexible joint, allows for highly accurate spacing between the work rolls. Allows adjustment. Further, the other spindle includes a work roll position adjustment mechanism for shifting and adjusting one of the work rolls along its axis, and a motion input that enables conversion to both horizontal and vertical operating positions at the extension portion of the spindle. The work roll position adjustment mechanism makes it possible to adjust the work roll position suitable for highly accurate rolling processing, and the operation input switching mechanism has a single operation input switching mechanism in both horizontal and vertical operation positions. It is possible to input driving force from an output source, thereby reducing the number of equipment in the rolling equipment as a whole, making it possible to lower equipment costs and reduce the installation area.

The present invention will be explained in more detail below based on the embodiment shown in the drawings. The small rolling mill 1 in the embodiment according to the present invention has a first
As shown in FIGS. 3 to 3, the work roll spindle 4 is horizontally supported rotatably via a bearing 24 in a chock 25, and the right end of the work roll spindle 4 is located outwardly on the right side of the frame 2. The work roll 3 is fixed onto the tip of the protruding end with a fixing nut 5 via a fitting 21.

Check 25 is shown in Figure 2 (A is A in Figure 1)
As shown in -A longitudinal sectional view and B-B longitudinal sectional view), the frame 2 is bored on the right side surface of the frame 2 through flange portions 18 provided along the vertical direction from the right end edge of the frame 2. It is supported by each support bolt 19 so as to be movable up and down on the frame 2 while being inserted into a plurality of through holes 20.
A working rod 28 in a hanging state is connected to a hydraulic cylinder 29 for hydraulic balance arranged at the upper part of the frame 2 through a connecting fitting 26 provided at the center of the upper part, and is pivotable by a pin 27 at the lower end of the working rod 28. connected. Furthermore, the check 25
The upper surface portion is formed with slopes that slope symmetrically forward and backward, respectively, along the front and rear edges thereof, and wedges 31 and 31' and wedges 32 and 32' (not shown) are formed on each slope. The wedges 31 and 31' are arranged in front and rear pairs in contact with each other, and the wedges 31 and 31' are threadedly engaged with each other and are on the transition bolt 33 perpendicular to the four axes of the work roll spindle. Wedges 32 and 32' are likewise on transition bolt 34. Note that the transition bolts 33 and 34 are supported on the frame 2 by bearings 35, respectively. In addition, the wedge 31,
The upper end portions of each of the guide seats 32 and the like are slidably fitted into the grooves of the guide seats 30 fixedly installed on the frame 2.

Further, the left end portion 6 of the work roll spindle 4 is connected to a joint spindle 7 by a flexible joint 8, and the joint spindle 7 is connected to an upper bearing casing 36 and an upper bearing casing 36 constituting the upper part of a pinion stand fixed in the frame 2 It is connected to a pinion gear 10 supported within a middle bearing casing 37 via a bearing 38 and a bearing 39, and the pinion gear 10 is formed with a cavity 40 along its axis. The joint spindle 7 is disposed so as to pass through the shaft 40 in the axial direction, and the left end of the joint spindle 7 and the left end portion of the pinion gear 10 are connected by a flexible joint 9.

The pinion gear 10 meshes with a pinion gear 14 supported through a bearing 52 and a bearing 53 in a middle bearing casing 37 and a lower bearing casing 51 that constitute the lower part of the pinion stand.

Further, the work roll spindle 11 is held by a bearing sleeve 41 parallel to the work roll spindle 4 below the work roll spindle 4 via a bearing 42, and the bearing sleeve 41 is fixed on the frame 2 through a flange portion 50. There is. The right end of the work roll spindle 11 projects outwardly to the right side of the frame 2, and the work roll 3' is fixed to the leading end of the work roll spindle 11 with a fixing nut 12 via a fitting 22.

Further, on the left end circumference of the work roll spindle 11, a step wall 11a of the shaft is provided on the right side, and a vertical wall 11b of the tightening nut is provided on the left side, and the work roll spindle 1 is provided between the step wall 11a and the vertical wall 11b.
A thrust bearing box 43 is supported on one peripheral surface via a thrust bearing 45, and the male threaded portion on the right end peripheral surface of the thrust bearing box 43 is connected to the female threaded portion of the left end portion of the bearing sleeve 41. It's screwed in. A gear portion 44 is formed on the left end peripheral surface of the thrust bearing box 43, and a pinion 47 is meshed with the gear portion 44. Further, the pinion 47 is fixed on an adjustment pinion shaft 46 that is supported parallel to the axis of the work roll spindle 11 on bearings 48 and 49 that are spaced apart and fixed to the lower part of the frame 2.

Further, a connecting shaft 13 extends from the left end of the work roll spindle 11 on its axis, and the connecting shaft 13 is inserted into a sleeve joint 15 extending from the right end of the pinion gear 14 along its axial direction. It is slidably inserted and supported.

Further, on a shaft extending from the left end of the pinion gear 14, a horizontal position input shaft 16 is connected, with its axis aligned with the work roll spindle 11 shaft, and the horizontal position input shaft 16 is disposed on the frame 2. The bevel gear 17 is supported by a bearing 68 provided and extends into the frame 2 from the left outside, and is fixed to a portion of the horizontal position input shaft 16 that exists within the frame 2. The bevel gear 17 includes a bevel gear 5.
The bevel gear 56 is supported by a bearing 69 disposed on the frame 2 and is fixed to the end of the input shaft 55 for vertical position extending from the lower outside into the frame 2 perpendicularly to the axis of the work roll spindle 11. I am forced to do so.

Next, the functions of each part of the small rolling mill 1 having the above-mentioned configuration will be explained. However, upward force is constantly applied to the chock 25 by pressurization by the hydraulic cylinder 29 via the actuating rod 28, pin 27, and connecting fitting 26 in this order. The chock 25 is maintained in position by wedges 31, 32, etc. in contact with its upper portion. At this time, wedges 31 and 31' or wedge 3
2 and 32' transition forward or backward according to the respective threads on the transition bolts 33 or 34. In this manner, the distance between each pair of wedges is adjusted by rotating the transition bolt 33 or 34.
When the distance between each pair of wedges is shortened, each wedge moves back up the slope of the upper part of the chock 25 against the acting force of the hydraulic cylinder 29, thereby displacing the chock 25 to a lower position. be done. When the distance between each pair of wedges is increased, each wedge descends down the slope at the top of the chock 25, and the chock 25 is displaced to a higher position by the action of the hydraulic cylinder 29.

The vertical position of the work roll 3 is adjusted via the work roll spindle 4 in conjunction with such a shifting operation to the chock 25. At this time, the flange portion 18 is connected to each elongated hole 20 via each support bolt 19.
The chock 25, that is, the work roll 3, is guided along a fixed trajectory within the range of the major axis dimension, thereby preventing the work roll 3 from shifting in the front-rear direction and making the transition operation accurate and easy. .

Further, as described above, the work roll spindle 4 is connected to the left end portion of the pinion gear 10 by the flexible joint 9 via the joint spindle 7, so that the work roll spindle 4 and the joint spindle 7 are It can be used in a relatively long length, and this means that when adjusting the vertical position with respect to the work roll 3, the rotation angle around the connection point by the flexible joint 9 of the work roll spindle 4 and joint spindle 7 is increased. Suggests that it is small. The effect based on this configuration feature is that the rotation angle is so small that it does not impede the rolling function of the work roll 3, and the work roll spindle 4 and joint spindle 7 are formed in series as a single spindle. The aim is to make it possible to

However, in the case where the rotation angle becomes relatively large as a result of the above-mentioned vertical position adjustment for the chock 25, the flexible joint 8 and the flexible joint 9 each function properly in the configuration of the embodiment described above. Only the inner spindle 7 is slightly inclined in the air 40, so that the work roll spindle 4 can be stably maintained on a horizontal reference line without any uneven stress remaining. .

As a result, the work surface 3a on the work roll 3 is maintained parallel to the work surface 3'a on the work roll 3', making it possible to perform rolling with extremely high precision.

Further, the work roll spindle 11 has a connecting shaft 13 that can be freely inserted and removed in the axial direction within the sleeve joint 15.
rotates the pinion gear 47 by rotating the adjustment pinion shaft 46, and
By rotating the thrust bearing box 43 within the bearing sleeve 41, the movement is adjusted in the left and right direction. This transition adjustment is performed by thrust bearing box 4
3, the thrust bearing box 43 moves to the right or left according to the thread on the male threaded part at the right end, but in the case of this movement to the right, there is no difference in level with the thrust bearing 45. The work roll spindle 11 is shifted to the right or to the left by contact with the wall 11a or, in the case of this leftward shift, by contact between the left end of the thrust bearing box 43 and the vertical wall 11b. As a result, work roll spindle 1
The work roll 3' on the tip end of the work roll 3 can be adjusted in position with high accuracy in the left and right direction while still maintaining the parallel state with the work roll 3, and the work grooves of both work rolls can be adjusted with high accuracy. 3b and the working groove 3'b can be adjusted with high accuracy.

Note that the work roll spindle 11 and the pinion gear 14 are connected in series using a structure that allows sliding in the axial direction, such as a spline or a slide coupling, so as not to interfere with the axial adjustment of the work roll 3'. It can be done.

Further, in the small rolling mill 1, an operation input switching mechanism is constituted by the horizontal position input shaft 16 and the vertical position input shaft 55, which are perpendicular to each other, and the bevel gear 17 and the bevel gear 56 that mesh with each other. FIG. 4 shows an embodiment in which the input switching mechanism is specifically applied.

In this embodiment, a recess 71 is provided in the foundation floor 70, and the speed reducer 58 is erected along the right side surface of the recess 71 so as to partially protrude upward. This speed reduction device 58 is constructed by having an input shaft 62 and output shafts 63 and 64, which are housed in a rectangular parallelepiped-shaped frame by appropriately combining several types of gears. The output shaft 63 for the horizontal position is exposed horizontally from the right side of the upwardly projecting portion of the output shaft 71, and the output shaft 63 for horizontal position is exposed from the left side of the same portion. Further, an output shaft 64 for a vertical position is exposed from the left side of a portion existing in the recess in parallel with the output shaft 63. A drive shaft 60 of a prime mover 59 disposed on the foundation floor 70 near the right end of the recess 71 is connected to the input shaft 62 by a coupling.

Further, the output shaft 63 is connected to the horizontal position input shaft 16 of the small rolling mill 1 arranged in a horizontal state via a coupling 61. A recessed groove portion 72 is formed, and a sole plate 75 is mounted on the bottom of the recessed groove portion 72 in a state spanning the recessed portion 71.
Further, the sole plate 73 extends parallel to the sole plate 75 and straddles the concave portion 71 to form the base floor portion 70.
It is mounted on top. The small rolling mill 1 placed in a horizontal state is secured to the base floor 70 by a mounting beam 57 on the sole plate 75, and further by a mounting bracket 74 on the sole plate 73, for example, by a clamping device, bolt tightening, cotter, etc.
fixed on top.

Further, when the small rolling mill 1 is arranged in a vertical state, the small rolling mill 1 is supported at its lower part on a pedestal 76 provided on the bottom of the recess 71, and the output shaft 64 is A sole plate 73' is installed on the surface of the foundation floor 70 along the edge of the recess 71 in the axial direction, and is fixed on the foundation floor 70 in a state where it straddles the recess 71 on each sole plate 73'. be done. At this time, the horizontal position input shaft 16 is in the open state, but next, the vertical position input shaft 55 is connected to the coupling 66, the intermediate shaft 65, and the coupling 6.
It is connected to the output shaft 64 on the speed reducer 58 via 7.

As mentioned above, the small rolling mill 1 can be fixedly arranged in both horizontal and vertical operating positions in a narrow area and with an extremely simple fixing configuration, and in both operating positions, the driving force from the single prime mover 59 can be applied. Any simple connection configuration that can be obtained can be adopted.

Therefore, mutual conversion of the small rolling mill 1 to both horizontal and vertical operating positions can be easily and quickly performed by using existing equipment such as a crane, in conjunction with the above-mentioned compact and lightweight configuration. I can do it.

Next, an example of a continuous rolling mill line configured using a plurality of small rolling mills 1 is shown in FIGS. 5 and 6.

As confirmed in this illustrated example of a continuous rolling mill line, based on the compact and lightweight configuration of each small rolling mill 1, there is no need for any equipment incidental to the conversion operation between the horizontal and vertical operating positions. , each small rolling mill 1 equipment can be arranged close to each other. Therefore, in this case, the installation surface required for the continuous rolling mill line is smaller than that of the conventional mill line, and the rolling processing line on the pass line 77 is shortened, so the line can be Even when the constituent small rolling mills are operated at normal rolling speeds, the line is capable of rapid rolling, and by completing the rolling process within a short time, the temperature drop in the rolled material is reduced. This makes it possible to improve dimensional accuracy and reduce power consumption.

[Brief explanation of the drawing]

Fig. 1... A longitudinal sectional front view of a small rolling mill according to an embodiment of the present invention, Fig. 2... A vertical sectional view thereof, Fig. 3... C
-C vertical sectional view, Figure 4...D-D vertical sectional view illustrating the arrangement state of a small rolling mill in an embodiment of the present invention, Figure 5...Rolling mill line in an embodiment of the present invention FIG. 6 is a longitudinal sectional view taken along the line E-E. Explanation of drawing symbols, 1...Small rolling mill, 2...Frame, 3, 3'...Work roll, 4...Work roll spindle, 5...Fixing nut, 7...Joint spindle, 8...Deflection Joint, 9... Flexible joint, 10... Pinion gear, 11... Work roll spindle, 14... Pinion gear, 16...
Input shaft for horizontal position, 17... Bevel gear, 25...
...Chock, 29...Hydraulic cylinder, 31,3
1', 32... Wedge, 33, 34... Transition bolt,
40...Empty, 43...Thrust bearing box,
45... Thrust bearing, 46... Adjusting pinion shaft, 47... Pinion gear, 55...
Vertical position input shaft, 56... Bevel gear, 58...
...Reduction gear, 70...Foundation floor, 71...Recess.

Claims (1)

[Claims] 1. A pair of work rolls forming a pass line;
two parallel spindles that fixedly support each of the work rolls in a cantilevered manner on their respective ends;
In a rolling mill comprising a pinion stand that interlocks the respective spindles, the pinion stand comprises two pinion gears that mesh with each other, and one pinion gear is formed with a hole along the axis. is a forced pressure device in which the one spindle is flexibly connected so as to pass through the space, and furthermore, a force is constantly applied to the spindle in a direction perpendicular to its axis; and the acting force of the forced pressure device. a work roll spacing adjustment mechanism comprising a wedge whose displacement is adjustable along the direction; and a work roll position adjustment mechanism on the other spindle for displacement adjustment of one of the work rolls along its axis. 1. A small rolling mill characterized by a configuration having: and an operation input switching mechanism that enables conversion to both horizontal and vertical operating positions at the extension portion of the spindle. 2. The small rolling mill according to claim 1, wherein the one spindle with the spacing adjustment mechanism is connected to the spindle at an intermediate portion thereof by a flexible joint. 3. The small rolling mill according to claims 1 and 2, in which the forced pressure device is a hydraulic cylinder.