JPH0646565Y2 - Roll chuck reshuffling device for rolling mill - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention is a rolling mill, in which a chock with roller bearings provided at both shaft ends of a work roll is detached or attached to the work roll for replacement. The present invention relates to a roll chock changing device.

[Conventional technology]

The upper and lower work rolls (hereinafter simply referred to as rolls) for rolling metal in a rolling mill have their shaft ends supported by the roller bearings of the upper and lower chocks, respectively, and the roll chock is formed by these rolls and the chock. There is. If the surface of the roll becomes worn or damaged, remove the chock from the shaft end of the roll, turn the roll, and then attach the chock to the shaft end of the roll. There is.

This reassembling work is performed relatively frequently, but conventionally, it was manually performed using a crane each time, so much labor and time were required, and there was also a problem in safety. Therefore, in the past, for example, the applicant of the present invention proposed a Japanese Patent Publication No.
A recombination device as disclosed in Japanese Patent No. 12571 is used.

This type of rearrangement device includes a pair of roll support columns located in the central portion of the machine bed in the longitudinal direction of the machine bed, with roll support rollers facing each other, and movable in the machine width direction. A pair of chock removal bases located on both sides that can be moved back and forth in the machine bed longitudinal direction by facing the guide rollers and pins, and a pair of set collars that can be moved back and forth in the machine bed longitudinal direction by facing the set collar gripping claws It is equipped with a stand.

When reassembling the rolls, the roll chock removed from the rolling mill is transported by crane with the taper roller in the center of the machine stand with the chock removal table moved forward and the roll support column and the set collar attachment / removal table retracted. When the lower roller is supported and then the taper roller is lowered, the upper chock and the lower chock of the roll chock are separately supported on the respective chock receiving bases of the chock removing base. Then, when the roll support column is advanced, the upper and lower rollers of the roll chock are supported by the roll support rollers of the roll support column.Therefore, the pin of the chock pull-out base is advanced and inserted into the pin hole of the upper chock. Is supported with the tilt prevented. Then, the set collar attaching / detaching table is moved forward to grip the set collars of the upper and lower rolls by the set color grasping claws, and then the set collar attaching / detaching table is retracted so that the set collar comes out of the upper and lower rolls. Then, when the chock removing table is retracted, the upper and lower chocks come out of the rolls and the upper and lower rolls are released from the support of the chocks, so that the upper roll and the lower roll are sequentially transported to the processing place by the crane. The mounting operation of the roll chock after processing is also performed almost in reverse. The pins are provided to prevent the chock from tilting and twisting when the chock is pulled out from the roll.

[Problems to be solved by the device]

By the way, a rolling mill is usually equipped with 6 to 7 units of rolling stands, and each rolling stand is appropriately selected from the three types of A type, B type, and C type in terms of its function. Different types of chocks are used alternately, such as the second rolling unit is type A and the second rolling unit is type B. In this case, for example, the A-type is a normal chock in which the upper chock and the left and right side surfaces of the lower chock are covered with the upper chock, and the B-type has the width of the A-type chock to facilitate reverse bending of the roll. It is a state in which two sheets are narrowed and stacked in the axial direction of the roll. The C-shaped chock is a chock for the upper roll and a chock for the lower roll that are vertically stacked, and the left and right side surfaces of the lower chock are not covered with a part of the upper chock.

As described above, while three types of chocks are used for one rolling mill, in the conventional reassembling device, since the pin for preventing tilt of the chock is fixed at one place, three types of chocks are used. You have to set up 3 shufflers for your chock,
There is a problem that equipment costs increase.

[Means for Solving the Problems]

In order to solve such a problem, in the present invention, there are two pins for preventing the tilt of the chock, which are inserted into the pin holes of the chock supported on the side of the chock pull-out base, one on the left and one on the middle and one on the middle. And two pieces were provided on the left and right sides of the lower row.

[Action]

When removing the chock from the roll, insert the pin on the side of the chock puller into the pin hole of the chock so that the chock will not tilt. If the chock is a normal type that looks like one from the side, use the middle pin, and if the chock is a type in which two layers are stacked in the axial direction of the roll, the upper and lower pins 4
Use two or two lower pins. If the chock is of a type in which two chocks are stacked one above the other, use four pins on the upper and lower stages.

〔Example〕

1 to 14 show an embodiment of a roll chock changing device of a rolling mill according to the present invention. FIG. 1 is its front view, FIG. 2 is a plan view, and FIG. 3 is III- of FIG. III cross section, 4th
1 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG. 1, FIG. 6 is a plan view taken along line VI-VI in FIG. 5, and FIG. 7 is taken along line VII- in FIG. VII sectional view, FIG. 8 is a VIII-VIII sectional view of FIG. 1, FIG. 9 is a IX-IX sectional view of FIG. 1, FIG. 10 is an XX sectional view of FIG. 9, and FIG. FIG. 10 is a sectional view taken along line XI-XI, FIG. 12 is a sectional view taken along line XII-XII of FIG. 11, and FIG. 13 is taken along line XIII-XI of FIG.
II sectional view and FIG. 14 are XIV-XIV sectional views of FIG. In FIG. 4, reference numeral 1 is a taper roller which is driven to move up and down by a plurality of roller receiving cylinders 2 provided in a pit below the floor, and is the entire roll chock K which is detached from a rolling mill (not shown) and conveyed. Is configured to be supported by the upper inclined surface in the raised position, and the roll chock K supported by the upper chock T ₁ and the lower chock T ₂ that are vertically stacked as shown in FIG. It is composed of an upper roll R ₁ and a lower roll R ₂ which are pivotally supported by the respective chocks T ₁ and T ₂ .

As shown in FIGS. 1 and 2, the rolls R ₁ and R ₂ are attached to the respective support bases 4 which are fixed on the floor surface and erected at both ends of the machine bed 3 extending in the machine longitudinal direction. A pair of hydraulic cylinders 5 for axial positioning are supported one above the other, and
As shown in FIG. 3, each of the support bases 6a erected at both ends of the bed 6 extending in the machine width direction at right angles to the center of the machine bed has hydraulic cylinders for moving the roll supporting columns. 8 are respectively supported. As shown in FIG. 4, a roll supporting column 9 is fixed to the piston rod working end of each hydraulic cylinder 8 while being supported by the bed 6 so as to be able to move forward and backward. A plurality of upper and lower roll supporting rollers 10 that support the rolls R ₁ and R ₂ at the position are rotatably supported so as to face each other. 11 and 12 mesh with each other and both roll support columns 9
It is a rack and a pinion that symmetrically make the movement of symmetry identical.

As shown in FIG. 1, a hydraulic cylinder 13 is supported on each of the support bases 4 on both sides, and at the working end of its piston rod, as shown in FIG.
A chock-pulling stand 15 having a frame 14 formed in a generally U-shape in a front view by 14a and a vertical member 14b is fixed by being supported by a machine bed 3 so as to be movable back and forth in its longitudinal direction. Fourteen vertical members are provided with four guide rollers 16 for guiding the lower chock T ₂ when the roll chock K descends, and a guide bar 17. The taper roller 1 is provided above the lower end horizontal member.
A lower chock cradle 18 for supporting the lower chock T ₂ released from the support of is urged upward by a compression coil spring 19 and is supported by the vertical member 14b.
Chock receiver 14c that supports the lower end surface when ₁ is a gate shape
Are integrally formed. Numerals 20 and 21 are wheels for rolling and smoothing the movement when pulling out the chocks T ₁ and T ₂ from the rolls R ₁ and R ₂ , and 22 is interposed between the horizontal member 14a and the chock receiver. Is a compression coil spring that biases the horizontal member 14a and the vertical member in a direction in which they are vertically separated from each other. Furthermore, 23 expands and contracts following the height of the roll chock K 4
Ram cylinders.

As shown in FIG. 5 and FIG. 7, on both sides of such a chock pullout base 15, there are five chocks T ₁ and T ₂ which prevent the chocks T ₁ and T ₂ from tilting when they are pulled out from the rolls R ₁ and R ₂ . A taper pin is provided. That is, the vertical members 14 on both sides
In b, a pair of hydraulic cylinders 24 are horizontally supported via a support base 25 at predetermined intervals in the lateral direction, and at the working end of the piston rod 26 thereof,
Two taper pins 27, which are inserted into the taper holes of the upper chock T ₁ by the forward movement, are attached to the left and right of the upper stage through rectangular support fittings. Below the hydraulic cylinder 24, 1
A plurality of hydraulic cylinders 28 are respectively supported in the middle parts of the vertical members 14b on both sides, and the piston claw end of each hydraulic cylinder 28 is inserted by advancing into the tapered hole of the upper chopper T ₁ when it is a gate type. One middle stage taper pin 29 is attached. Further, below the hydraulic cylinders 28, two hydraulic cylinders 30 are respectively supported below the vertical members 14b on both sides with a predetermined interval in the lateral direction. On the edge
Lower 2 inserted by advancing down chock T ₂ of the taper hole
Each taper pin 31 is attached. That is, five taper pins are provided on each side, and the chocks T ₁ , T ₂
It is configured to be selected and used according to the type.

As shown in FIG. 2 and FIG.
Each bracket 32 integrally formed on the 15 vertical members 14b on both sides
A hydraulic cylinder 33 is pivotally attached to the piston, and a pair of upper and lower push rods 34 slidably fitted in the holes of the bracket 32 are connected and fixed to the working end of the piston rod by a connecting fitting 35. By pushing back the piston rods of the hydraulic cylinders 33 on both sides, both push rods 34 roll R ₁ ,
By sandwiching the plane of the axial end oval shaped portion of the R ₂ it is configured to position and fix the roll R _1, R ₂ in the circumferential direction. As shown in FIG. 4, a pair of upper and lower hydraulic cylinders 35 are fixed to the roll supporting columns 9 on both sides, and a roll clamp 36 is attached to the working end of the piston rod. By advancing the piston rod, the rolls R ₁ and R ₂ positioned in the circumferential direction by the push rod 34 are clamped and fixed from both sides. Further, as shown in FIG. 1, a push fitting 37 is attached to the working end of the piston rod 5a of the hydraulic cylinder 5, and the rolls R ₁ and R ₂ are axially moved by advancing the piston rod 5a. Is configured to be positioned and fixed to.

As shown in FIGS. 1 and 9 to 13, a hydraulic cylinder 38 is supported on the support bases 4 on both sides, and a set collar attachment / detachment base 39 is mounted on the working end of the piston rod thereof. It is supported and fixed to the bed 3 so as to be movable back and forth in the longitudinal direction. A pair of hydraulic cylinders 40 pivotally mounted on the set collar attachment / detachment base 39 has a piston rod working end on which a roll is attached.
A ring 41, which is formed concentrically with R ₁ and R ₂ and is inscribed in the inner circumference of the set collar attachment / detachment table 39 side, is attached via a lever 42, and the ring 41 is moved by moving the piston rod forward and backward.
Is configured to rotate in the forward and reverse directions by a predetermined angle. The piston rod 5a passes through the center of the ring 41. On the other hand, on the outer peripheral surfaces of the end shafts of the rolls R ₁ and R ₂ ,
An annular set collar 43 is rotatably fitted by engaging a protrusion 43a provided at a position that divides the circumferential direction into four equal parts with an annular groove 44 of the rolls R ₁ and R ₂ , and its outer peripheral thread An inner hole screw portion of an adjusting ring 46, one end of which is brought into close contact with the inner ring of the chock side roller bearing 45, is screwed into the portion so as to be adjustable forward and backward. By doing this, the rolls R ₁ and R ₂ are choked.
It is axially positioned with respect to T ₁ and T ₂ , and the clearance between the roller bearing 45 and the adjusting ring 46 is adjusted by the screw action by the rotation of the adjusting ring 46. A bolt 47 is screwed into a screw hole provided at one location on the outer periphery of the set collar 43. By engaging the bolt 47 with one of the grooves 48 on the adjustment ring 46 side after the clearance adjustment, The adjusting ring 46 is configured to be locked in the adjusting position. Reference numeral 49 is a claw bolted to a portion that divides the outer peripheral portion of the ring 41 into two parts in the circumferential direction, and a groove 50 provided in the set collar 43 by advancing the ring 41 moving forward and backward together with the set collar attaching / detaching table 39. And the set collar 43 is rotated integrally with the ring 41. Also, ring 41
A pin extraction claw 51 having an inclined surface and a notch at the tip is bolted at a location that divides the outer peripheral portion into two parts in the circumferential direction, while the pin hole provided in the set collar 43 is A pin 54 urged in a direction of engaging with the knock hole 53 on the annular groove 44 side by a compression coil spring 52 is fitted, and a nut 55 with a collar is screwed into the threaded portion. By doing so, when the pin removing claw 51 retracts together with the ring 41 and comes out from under the neck of the nut 55, the compression coil spring
The elastic force of 52 causes the pin 54 to engage with the pin hole 53, and the set collar
43 is configured to be locked against the rolls R ₁ and R ₂ . Further, a pawl shaft 56 is rotatably supported in a plurality of shaft holes provided in a circular portion surrounding the ring 41 of the chock removal table 39, and a sector gear 57 and a pawl are provided at its protruding end portion.
58 and are pivoted. And the sector gear on the ring 41
A rack 59 that meshes with 57 is fixed, and the ring 41 rotates so that the rack 59 and the sector gear 57 mesh with each other so that the pawl shaft 56 moves approximately 90 degrees.
The pawl 58 is configured to grasp the set collar 43 by rotating. Reference numeral 60 denotes a vertical groove extending in the axial direction, which is provided at a location that bisects the outer peripheral surfaces of the end shafts of the rolls R ₁ and R _{2 in} the circumferential direction, and the protrusion 43a of the set collar 43 engages with the vertical groove 60. Roll the set color 43 by combining
It is constructed so that it can be removed from the end shafts of R ₁ and R ₂ .

The operation of the roll chock changing device configured as described above will be described by taking as an example the operation of removing and installing the roll chock having the two upper and lower chocks as shown in FIG. When starting the work of removing the roll chock,
The taper roller 1 is at the upper limit and the roll support column 8 is retracted. Further, the set collar attaching / detaching table 39 and the piston rod 5a of the hydraulic cylinder 5 are also retracted. In this state, the roll chock K is transported from the rolling mill by a crane and placed so that the rolls R ₁ and R ₂ are supported by the taper roller ₁ . When lowering the roll chock K, lower chock T ₂
Are guided by the guide roller 16 and the guide bar 17. After mounting, the piston rod 5a of the hydraulic cylinder 5 is moved forward to push the shaft ends of the rolls R ₁ and R ₂ with the pressing metal fittings 37, and after axially positioning, the taper roller 1 is lowered with the roller receiving cylinder 2. Roll chock K is lower chock cradle 18
Be transferred to and supported. Therefore, when the roll support columns 9 on both sides are moved forward by the hydraulic cylinder 8, the rolls R ₁ and R ₂ of the roll chock K are supported by the roll support rollers 10, so the hydraulic cylinder 24 advances the two taper pins 27 on the upper stage, Insert it into the taper hole of the upper chock T ₁ . Further, the lower two taper pins 31 are moved forward by the hydraulic cylinder 30 and inserted into the tapered holes of the lower chock T ₂ . After fixing the roll chock K in this way, use the hydraulic cylinder 33 to push the rods on both sides.
When 34 is moved forward, as shown in FIG. 9, the end shafts of the rolls R ₁ and R ₂ are pushed to be in a vertical state so that the planes thereof face directly to the side, and the rolls R ₁ and R ₂ are in the circumferential direction. Because it is positioned,
When the roll clamp 36 is moved forward by the hydraulic cylinder 35, the rolls R ₁ and R ₂ are grasped with their rotation restricted. After retracting the used push rod 34 and moving the set collar detachable base 39 forward with the hydraulic cylinder 38, the ring 41 moves forward and the pin removing claw 51 enters under the neck of the nut 55. By this action, the pin 54 rises against the resilience of the compression coil spring 52 and comes out of the pin hole 53. Further, since the pawl 49 is engaged with the groove 50 of the set collar 43 as the ring 41 advances, the ring 41 and the set collar 43 are integrated in the rotational direction. Then, rotate the ring 41 about 20 ° with the hydraulic cylinder 40, and
51 and the claw 49 rotate, and the set collar 43 also rotates, and the protrusion 43a corresponds to the vertical groove 60 on the roll R ₁ , R ₂ side. Further, as the ring 41 rotates, the sector gear 57 that meshes with the rack 59 integrated therewith rotates about 90 °, so that the claw 58 rotates and the set collar 43 is grasped by the claw 58.

After the ring 41 and the set collar 43 are integrated as described above, when the set collar mounting / removal table 39 is retracted by the hydraulic cylinder 38, the set collar 43 engages the protrusions 43a with the vertical grooves 60 and rolls R ₁ , R. Removed from ₂ . So the hydraulic cylinder
When the chock removing table 15 is retracted at 13, the upper chock T ₁ and the lower chock T ₂ are removed from the rolls R ₁ and R ₂ . In this case, both chocks T ₁ and T ₂ are supported by the upper two taper pins 27 and the lower two lower taper pins 31, so that they do not tilt and twist when pulled out.

By removing the chocks T ₁ and T ₂ in this manner, the rolls R ₁ and
Since R ₂ is released from the support, the piston rod 5a of the hydraulic cylinder 5 and the roll clamp 36 are retracted, and then only the upper roll R ₁ is transported to the processing place by the crane. Then, when the roll support column 9 is retracted, the lower roll R ₂ rides on the taper roller 1, and the removal work is completed by transporting the lower roll R ₂ to the processing place with a crane.

After the roll R _1, R ₂ and turning can be fitted with chocks T _1, T ₂ on the roll R _1, R ₂ by the the ho Isuzu reverse operation.

FIGS. 15 (a) to 15 (d) are schematic front views of various types of chocks shown for explaining the usage states of the taper pins 27, 29, 31 respectively, and are shown in FIG. 15 (d) in the above embodiment. As described above, since the rearrangement operation when the upper chock T ₁ and the lower chock T ₂ are vertically stacked is described, the chocks T ₁ and T ₂ are fixed by the upper two taper pins 27 and the lower two taber pins 31. but was, when viewed from the side as shown in FIG. 15 surrounded by chocks on the lower chocks portal (a) is a single chock T ₃ uses the middle Tebapin 29 only one. Further, in the case of a chock as shown in FIG. 15 (b) in which _one chock T ₃ is stacked _{two in} the axial direction of the rolls R ₁ and R _{2 in} a side view, it is the same as the above embodiment. In addition, the upper two taper pins 27 and the lower two taper pins 31 are used. In this case, as shown in Fig. 15 (c), the lower two taper pins
Although only 31 may be used, it is preferable to use four taper pins as shown in FIG. 15 (b) because it tends to be inclined when the chock is pulled out. Thus, one recombining device can handle three types of roll chocks.

[Effect of device]

As will be apparent from the above description, according to the present invention, in the roll chock changing device of the rolling mill, the pin for preventing the tilt of the chock, which is supported on the chock removing table side and is inserted into the pin hole of the chock, is provided at the upper left and right sides. 2 in 1 and 1 in middle
By arranging one and two on the left and right of the lower stage, one recombining device can share five taper pins on one side and can recompose three or more types of roll chocks, significantly reducing equipment costs. can do. In addition, since the chock is pulled out by using the four taper pins on the upper and lower sides, the chock does not tilt and is not twisted, and the chock is smoothly pulled out to improve workability.

[Brief description of drawings]

1 to 15 show an embodiment of a work roll chock changing device of a rolling mill according to the present invention. FIG. 1 is its front view, FIG. 2 is a plan view, and FIG. 3 is III of FIG. -III sectional view, FIG. 4 is an IV-IV sectional view of FIG. 1, FIG. 5 is a VV sectional view of FIG. 1, FIG. 6 is a VI-VI plan view of FIG. 5, and FIG. 5 is a sectional view taken along line VII-VII in FIG. 5, and FIG. 8 is taken along line VIII-VI in FIG.
II sectional view, FIG. 9 is a IX-IX sectional view of FIG. 1, FIG. 10 is a XX sectional view of FIG. 9, and FIG. 11 is a XI-XI sectional view of FIG.
12 is a sectional view taken along the line XII-XII in FIG. 11, and FIG. 13 is a sectional view taken along the line XI in FIG.
II-XIII sectional view, FIG. 14 is a XIV-XIV sectional view of FIG. FIGS. 15 (a) to 15 (d) are schematic front views of various chocks shown for explaining the usage state of the taper pin. 15 …… Chocking stand, 27,29,31 …… Taper pin, K…
… Roll chock, T ₁ …… Upper chock, T ₂ , …… Lower chock, R ₁ , …… Upper roll, R ₂ …… Lower roll.

Claims (1)

[Scope of utility model registration request] 1. A support for advancing and retracting is provided on the side of the chock removing base,
A roll chock reassembling device for a rolling mill, comprising two pins on the left and right on the upper stage, one pin on the left and right on the middle stage, and two pins on the left and right in the lower stage, which are inserted into pin holes on the side of the chock to prevent tilting.