JPH09164409A - Roll shifting device for rolling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly execute shifting motion without transmitting torsion or bending stress excessively generated on a shaft coupling to a roll shifting device. SOLUTION: A 1st intermediate roll 89 is freely rotatably connected through a connecting member 2 and a shaft coupling 4 to a shifting/driving member 3 and forces in the shifting directions F1, F2 of the shifting/driving member 3 are transmitted to the 1st intermediate roll 89. The connecting member 2 has a weak part 12 where a notch 13 is formed over the entire periphery in the peripheral direction in the outer peripheral part, its one end part 15 is screwed in the shifting/driving member 3 and the other end part 16 is screwed in the receiving part 6 of the shaft coupling 4. The receiving part 6 is freely rotatably connected with a pin around the axis vertical to the axis of the shaft coupling in the state where the receiving part is fit into the fitting recessed part 9 of the main body 80 of the shaft coupling. Then, when excessive torsion and bending stress act on the shaft coupling 4, the connecting member 2 is broken in the weak part 12 and the transmission of torsoin and bending stress to the roll shifting device 1 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling facility for rolling metal strips such as stainless steel strips and other high alloy iron strips, which are materials to be rolled, into a target shape such as flatness required in the next step. The present invention relates to a device for continuously shifting an intermediate roll included in a multi-stage cold rolling mill such as a single-base reversing cold rolling mill and a tandem cold rolling mill during rolling.

[0002]

2. Description of the Related Art In a cold rolling facility, a metal strip such as a stainless steel strip, which is a material to be rolled, which has been roughly ground in a previous process, is used as a multi-stage unit such as a single base levers type cold rolling mill and a tandem type cold rolling mill. It is rolled by a cold rolling mill, and then subjected to continuous annealing pickling treatment or bright annealing treatment in the next process, temper rolling, and further continuous coloring treatment or finish polishing treatment according to product specifications, and tension in the final process. It is cut into a predetermined length by a leveling or cutting device using a leveler and shipped as a coil product or a plate product having specifications specified by the customer. Such final products must meet the demands of customers, and these demands become strict due to the sophistication and diversification accompanying the rise of social living standards. The requirement for the next step in a plurality of manufacturing steps must be achieved with high accuracy and certainty in the preceding step. Particularly, in the finishing step of performing the above-mentioned continuous color development processing and finish polishing processing which are finishing steps, and the temper rolling step which is the preceding step and the continuous annealing pickling step and bright annealing step, the shape of the metal strip is largely corrected. Since it is not intended for this purpose, it depends largely on the cold rolling process which is the preceding process, and therefore, highly accurate shape control is desired in the cold rolling process.

A cold rolling facility for carrying out such a cold rolling process is provided with a multi-stage cold rolling mill such as the above-described single-base levers cold rolling mill and tandem cold rolling mill. A typical example of this multi-stage cold rolling mill is a 20-high Sendzimir mill, which is a lever type cluster type cold rolling mill. This 20-high Sendzimir mill has a pair of upper and lower work rolls that come into contact with a metal strip that is a material to be rolled, two upper and lower first intermediate rolls that support each work roll, and upper and lower work rolls that respectively support the first intermediate roll. Three second intermediate rolls and four upper and lower backup rolls respectively supporting the second intermediate rolls are vertically symmetrically arranged in the mill housing. Each backup roll has a plurality of split rolls, and the contact pressure to the second intermediate roll is adjusted while eccentricizing each split roll individually, whereby the roll bender pressure to the metal strip by each work roll is applied in the width direction. The roll surface of each work roll is changed by reciprocating the pair of upper and lower first intermediate rolls alternately at a low speed in the axial direction while changing the shape to correct the crown change due to the heat effect and the disturbance of the rolling load. The properties are made uniform, the roll marks are prevented from being transferred to the metal band by the dividing rolls, and the flatness accuracy of the metal band is improved.

A roll shift device for shifting the first intermediate roll is provided with a second roll on one side of the mill housing.
Provided with a reducer for rotating the driving roll of the intermediate roll at a predetermined rolling speed and a backup roll crown adjusting means for driving a saddle for individually eccentricizing the split roll between the split rolls of the backup roll. ing. This roll shift device includes a shift drive member connected to one axial end of the first intermediate roll via a shaft coupling. The shift drive member is reciprocated along its axis in a direction close to the rolling mill and a direction away from the rolling mill.

[0005]

Since the rolling load is large in such cold rolling, the work roll is curved in the sheet passing direction, and by this curvature, the first intermediate roll and the shaft coupling connected to the first intermediate roll. Bending stress occurs in the. Further, friction in the shaft joint increases due to poor rotation due to wear in the shaft joint that connects the first intermediate roll and the shift driving member, and torsional stress occurs. Further, since the shift driving member performs a shift operation with a shift force of, for example, 20 tons or more, if a dimensional error occurs when the shift driving member and the shaft coupling are mounted, the shift driving member shifts when the first intermediate roll is shifted. Since the axis line of the shaft coupling is displaced with respect to the direction, bending stress occurs in the shaft coupling. The bending and torsional stresses thus generated in the shaft coupling are transmitted via the shift driving member to the roll shift device connected to the shift driving member. If the torsional and bending stresses become excessively large, the roll shift device may be damaged or unevenly worn, which makes it impossible to smoothly perform the shift operation.

Therefore, an object of the present invention is to prevent the rolling and twisting stresses generated in the shaft coupling from being transmitted to the roll shifting device so that a smooth shift operation can be performed. A shift device is provided.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a rolling mill having a pair of upper and lower work rolls through which a metal strip is threaded, an intermediate roll supporting each work roll, and a backup roll supporting the intermediate roll. The one end of the intermediate roll in the axial direction of the intermediate roll is rotatably connected to one end of the shift drive member of the shift drive means provided at a predetermined fixed position in the longitudinal direction via a shaft coupling, and the shift direction of the shift drive member is In the roll shift device of the rolling equipment for transmitting the force of the above to each intermediate roll, the longitudinal one end of the shift driving member and the shaft coupling are fragile portions in which notches are formed in the outer peripheral portion along the entire circumferential direction. Is a roll shift device for rolling equipment, wherein the roll shift device is connected by a connecting member having. According to the present invention, the shift drive member of the shift device is connected to one axial end of the intermediate roll of the rolling mill via the shaft joint. When the shift driving member is driven to reciprocate in the axial direction, the displacement is transmitted to the intermediate roll via the shaft joint, and the intermediate roll is allowed to rotate with respect to the shift driving member by the shaft joint. The displacement is driven in the direction, and the shape of the metal strip rolled by the rolling mill, in particular the flatness, is controlled so as to reach the target value required in the next step. One end of the shift driving member in the longitudinal direction and the shaft joint are connected by a connecting member, and the connecting member has a weak portion in which a notch is formed over the entire circumference in the circumferential direction. Since the notch is formed in the fragile portion of the connecting member in this manner, the cross-section perpendicular to the axis of the connecting member suddenly changes and becomes small in the fragile portion. Therefore, when excessive bending and torsional stress is applied to this connecting member, the stress distribution of the connecting member is such that the stress locally increases at the fragile portion and stress concentration occurs at the fragile portion. Therefore, when bending or twisting stress occurs in the intermediate roll, the shaft joint, the connecting member and the roll shift driving member due to the displacement of the intermediate roll or the rotation failure of the shaft joint, stress concentration occurs in the fragile portion of the connecting member and is fragile. The part is broken. This prevents these bending and torsional stresses from being transmitted to the roll shift device via the roll shift driving member, so that damage and uneven wear of the roll shift device can be prevented and a smooth shift operation can be performed. .

Further, in the connecting member of the present invention, external threads are formed at both ends in the axial direction with respect to the fragile portion, and one end of the shift driving member in the longitudinal direction is formed at one end of the connecting member. A screw hole into which a screw is screwed is formed, and the shaft joint rotates around an axis line perpendicular to the axis line of the shaft joint in a state of being fitted in the shaft joint body having a fitting recess. And a receiving portion that is freely pin-coupled and that has a screw hole into which an external screw formed at the other end of the connecting member is screwed. According to the present invention, one end of the connecting member is screwed to one end of the shift driving member, the other end of the connecting member is screwed to the receiving portion of the shaft coupling, and the connecting member and the shaft coupling are of the shaft coupling. It is rotatably connected about an axis perpendicular to the axis. Therefore, when the connecting member breaks at the fragile portion, each of the remaining connecting members screwed to the shift driving member and the receiving portion is removed, and a new connecting member is screwed to the shift driving member and the receiving portion. The shift drive member and the shaft coupling can be connected to each other again. When the connecting member is thus broken, only the connecting member needs to be replaced, and the intermediate roll, the shaft coupling and the shift driving member do not need to be replaced. Further, since the receiving portion to which the other end of the connecting member is screwed is pin-coupled to the shaft joint main body so as to be rotatable around an axis line perpendicular to the shaft line of the shaft joint, it is perpendicular to the shaft line of the shaft joint of the intermediate roll. It is possible to allow a displacement about an axis line, which allows bending stress about an axis line perpendicular to the axis line of the shaft coupling. Further, the receiving part is
Since the pin is coupled to the shaft coupling body while being fitted in the fitting recess, the force in the shift direction transmitted to the shaft coupling through the shift driving member is not limited to the pin for coupling the pin and the receiving part. Since it is transmitted to the shaft coupling by the fitting recess, a large force in the shift direction can be transmitted to the intermediate roll without damaging the shaft coupling.

A lubricating oil supply hole extending along the axis of the connecting member of the present invention is formed, and an oil passage for guiding lubricating oil to the lubricating oil supply hole is formed in the shift driving member. Is characterized by. According to the invention, since the lubricating oil supply hole is formed in the connecting member, when the lubricating oil introduced from the oil passage formed in the shift driving member is supplied to the lubricating oil supply hole, the lubricating oil supply hole is formed. Is rotatably connected to the sliding contact surface between the receiving portion and the fitting recess, which are pin-connected in the fitting recess of the shaft coupling body, the pin of the pin connection, and the intermediate roll. It is supplied to the rotating part of the shaft coupling, and the receiving part and the shaft coupling body and the shaft coupling body and the intermediate roll can be smoothly and rotatably connected. Thus, the lubricating oil can be stably supplied to the shaft coupling by the lubricating oil supply hole and the oil passage.

Further, between the outer screw formed on one end of the connecting member and the intermediate screw between the outer screws formed on both ends of the connecting member of the present invention, the connecting screw is perpendicular to the axis of the connecting member. An annular step surface is formed that extends annularly in the plane, and an outer screw formed at one end of the connecting member is screwed to the opening end portion of the shift driving member where the screw hole is opened. It is characterized in that opposing annular receiving surfaces are formed, and a sandwiching ring is interposed between the receiving surface and the step surface. According to the present invention, the step surface formed on the connecting member and the receiving surface formed on the shift driving member are opposed to each other while the connecting member is screwed into the screw hole of the shift driving member, The connecting member and the shift driving member are screwed and connected to each other with the holding ring interposed between the connecting member and the receiving surface.
Therefore, for example, a plurality of holding rings having mutually different thicknesses are prepared, and one of these holding rings is selected and fitted into an outer screw formed at one end of the connecting member, and the outer screw is attached to the shift driving member. When the connecting member is securely screwed and connected to the shift driving member, the position around the axis of the connecting member can be adjusted by screwing and connecting the connecting member and the shift driving member. When the pin is connected to the joint, the connecting member can be accurately positioned. Therefore, for example, when the connecting member is replaced, even if an error occurs around the axis line with the previous connecting member when a new connecting member is screwed, the pinching ring can be accurately adjusted by replacing the holding ring. Positioning around can be done.

[0011]

1 is a cross-sectional view showing a part of a roll shift device 1 for rolling equipment according to an embodiment of the present invention, and FIG. 2 is a plan view showing a part of the roll shift device 1. It is a figure. The roll shift device 1 has a substantially horizontal axis 10
And a shift driving member 3 made of hard metal such as nickel chrome molybdenum steel. A first intermediate roll 89 of rolling equipment is rotatably connected to one end 14 of the shift driving member 3 in the longitudinal direction via a connecting member 2 and a shaft coupling 4. The connecting member 2 has a fragile portion 12 in the outer peripheral portion of which a notch 13 is formed over the entire circumference in the circumferential direction. With respect to the fragile portion 12, external threads 42,
43 are formed respectively. A screw hole 44 into which an external screw 42 formed at one end of the connecting member 2 is screwed is formed in one end 14 of the shift driving member 3 in the longitudinal direction.
Is engaged with the shaft joint main body 45 having the fitting recess 9 and the outer screw 43 formed at the other end of the connecting member 2 by pin coupling in a state of being fitted in the fitting recess 9. The receiving portion 6 in which the screw hole 46 is formed is included.

The shaft joint main body 45 has a support member 7 having a fitting recess 9 into which the receiving portion 6 fits, and an annular projection 23 integrally connected to the support portion 7 coaxially with the support portion 7. And a sleeve 8 formed on the. The support member 7 has a base portion 47 into which one axial end portion of the sleeve 8 is screwed and fitted,
The base portion 47 has a jaw-shaped portion 11 which is integrally formed and has a substantially U-shaped cross section perpendicular to the axis, and the fitting recess 9 is formed in the jaw-shaped portion 11. The jaw portion 11 is formed with a through hole 22 into which the head portion 21 of the lock pin 19 inserted into the receiving portion 6 is fitted,
The receiving portion 6 screwed with the connecting member 2 is detachably connected.

In the sleeve 8, a pair of thrust bearings 24 and 25 are provided on both sides of the protrusion 23, and annular spacers 26 and 27 are provided on both sides of the thrust bearings 24 and 25, respectively. Each spacer 2
Radial bearings 28 and 29 are provided on both sides of 6 and 27. A plurality of bolts 30 are provided at the end of the first intermediate roll 89.
The insertion shaft 31 inserted into the sleeve 8 is coaxially fixed by the insertion shaft 31, and the thrust bearings 24 and 25, the spacers 26 and 27, and the radial bearings 28 and 29 are mounted on the insertion portion 32 of the insertion cylinder 31 having a right cylindrical shape. It

A small diameter portion 33 and a screw portion 34 are formed at one end portion in the axial direction of the insertion portion 32, and a fixing nut 35 is screwed to the screw portion 34. By tightening the fixing nut 35, the thrust bearing 24, the spacer 26, and the inner ring 48 of the radial bearing 28, which are supported by the projection 23, are inserted through the thrust ball bearing 36 and the push ring 37 mounted on the small diameter portion 33. It is pinched. A large diameter portion 38 and an end plate 39 are formed at the other end of the insertion portion 32 in the axial direction, and the end plate 39 is fixed to the first intermediate roll 89 by the plurality of bolts 30. The insertion portion 32 of the large diameter portion 38
An annular support surface 40 is formed at the end portion connected to the. The ridge 23 receives a clamping force from the support surface 40 due to the tightening force of the fixed nut 35, and the other thrust bearing 2
5, the spacer 27, and the inner ring 49 of the radial bearing 29 are pinched. In the sleeve 8 in which the thrust bearings 24 and 25, the spacers 26 and 27, the radial bearings 28 and 29, and the thrust ball bearing 36 are housed, the lubricating oil supply hole 18 formed in the connecting member 2 is inserted into the through hole. A lubricant such as spindle oil is supplied via 41.

FIG. 3 is a sectional view showing a state in which the shift driving member 3 and the connecting member 2 are connected. A large-diameter intermediate portion 55 having the fragile portion 12 is formed between the outer screw 42 formed on the one end 15 of the connecting member 2 and the outer screw 43 formed on the other end 16. This intermediate portion 55 is the fragile portion 1.
2, the first intermediate portion 55 on the one end portion 15 side of the connecting member 2
a, the second intermediate portion 55b on the other end portion 16 side, and the fragile portion 12. A step surface 56 that annularly extends in a plane perpendicular to the axis 5 of the connecting member 2 is formed between the first intermediate portion 55a and the outer screw 42, and the outer screw 43 and the second intermediate portion 55b.
A step surface 71 extending annularly in a plane perpendicular to the axis 5 of the connecting member 2 is formed between and. A large diameter into which a part of the first intermediate portion 55a is inserted into the opening end portion 57 where the screw hole 44 of the shift driving member 3 is opened and the outer screw 42 of the connecting member 2 is screwed into the screw hole 44. The insertion part 51 is formed. An annular receiving surface 58 is formed in the insertion portion 51 of the opening end portion 57 so as to face the step surface 56 with a part of the first intermediate portion 55a inserted. The receiving surface 58 and the step surface are formed. An annular holding ring 59 is interposed between the ring 56 and 56. The holding ring 59 is made of, for example, rolled steel for general structure, and preferably SS400 specified in JIS G 3101 is used.

One end 14 in the longitudinal direction of the shift driving member 3
, A lower set screw 61 is provided in FIG.
An oval recess 64 extending in the axial direction is formed in the first intermediate portion 55a of the connecting member 2 corresponding to the tip 52 of the set screw 61 in a state where the connecting member 2 is screwed to the shift driving member 3. The connecting member 2 is stopped by the recess 64 and the stop screw 61. An insertion hole 62 through which the lock pin 19 is inserted is formed near the other end 16 of the connecting member 2 in a direction perpendicular to the axis 5 of the connecting member 2 and in the same direction as the direction around the axis 5 of the recess 64. The pitch of the outer screw 42 formed at one end of the connecting member 2 is selected to be, for example, 3 mm, and the thickness of the sandwiching ring 59 is, for example, in the range of 3.5 to 6.5 mm, at intervals of 0.15 mm, 3.50 mm and 3.65 mm. ，
3.80 mm, ..., 6.20 mm, 6.35 mm, 6.
21 kinds of 50 mm are prepared, and each of these holding rings 5
By appropriately selecting any one of the nine, the recess 6 is formed when the connecting member 2 is securely screwed to the shift driving member 3.
4 and the set screw 61 can be accurately positioned around the axis 5. By accurately positioning the connecting member 2 on the shift driving member 3 about the axis 5 as described above, the insertion hole 62 is also accurately positioned about the axis 5, thereby connecting the connecting member 2 and the shaft coupling 4 to each other. Can be accurately connected. In this way, the connecting member 2 and the shift driving member 3 are coaxially connected. The length L5 of the oval recess 64 in the direction of the axis 5 is selected to be, for example, 15 mm. The first intermediate portion 55a is provided so as to protrude from the one end surface 3a of the shift driving member 3 by about L6 = 6 mm in a state where the connecting member 2 is mounted on the shift driving member 3.

A lubricating oil supply hole 18 is formed in the connecting member 2 along the axis 5, the lubricating oil supply hole 18 is formed near the other end of the connecting member 2, and a lock pin 19 is inserted therethrough. The holes 62 are formed continuously. In the lubricating oil supply hole 18 opening at the other end 2b of the connecting member 2, the oil amount adjusting member 63 is provided.
Is provided to adjust the amount of lubricating oil supplied to the shaft coupling 4, the insertion hole 62, and the sliding contact portion between the receiving portion 6 and the fitting recess 9.

The outer diameter D1 of the intermediate portion 55 is, for example, D1 =
The fragile portion 12 has a radius R1 =
A U-shaped notch 13 having a width of 5 mm and a width L7 of 10 mm is formed on the outer peripheral portion of the intermediate portion 55 over the entire circumference in the circumferential direction, for example, having an outer diameter D2 = 35 mm. Therefore, the cross section perpendicular to the axis of the connecting member 2 suddenly changes and becomes smaller in the fragile portion 12, so that the first intermediate roll 89, the shaft coupling 4, and the connecting member 2
When excessive bending and torsional stress is generated in the shift driving member 3, stress concentration occurs in the fragile portion 12, and the connecting member 2 breaks at the fragile portion 12, thereby eliminating bending and torsional stress, and shifting drive. It is possible to prevent the stress from being transmitted to the member 3 and prevent damage to the roll shift device 1. Such a fragile portion 12 is, for example, 1.0 to 1.2 of the fatigue limit stress value of the connecting member due to the normal axial load.
The cross-sectional area that doubles is arbitrarily selected, and fracture occurs when abnormal torsional stress and / or abnormal bending stress acts.

An intermediate portion 55b on the other end 16 side of the connecting member 2
As shown by phantom lines in FIG. 8, a bottom surface 65 that is the lower side of FIG. 3 and side surfaces 66 and 67 that are the front side and the depth side with respect to the paper surface of FIG. 3 are formed flat.
Therefore, when the fragile portion 12 is broken and the connecting member 2 on the other end 16 side is left in the receiving portion 6, the flat side surfaces 66,
The connecting member 2 can be easily removed from the receiving portion 6 by rotating the connecting member 2 left by engaging a tool such as a wrench with 67 to the receiving portion 6.

The notch 13 of the fragile portion 12 has a gap L1 = 30 mm, for example, and the engaging portions 6 extending parallel to each other.
8,69 are formed. Therefore, when the fragile portion 12 is broken and the connecting member 2 on the side of the one end 15 left on the shift driving member 3 is removed, a tool such as a wrench is engaged with the engaging portions 68 and 69 to shift the connecting member 2 by shift driving. The coupling member 2 left behind by rotating the member 3 can be easily removed from the shift driving member 3.

The outer diameter D3 of the outer screw 42 formed at one end 15 of the connecting member 2 is selected to be, for example, 42 mm, and the outer diameter D4 of the outer screw 43 formed at the other end 16 is larger than the outer diameter D3. For example, it is selected to be 45 mm. This prevents the shift driving member 3 from being mistakenly screwed with the outer screw 43 formed on the other end 16 of the connecting member 2.

The distance L2 between the one end surface 2a of the connecting member 2 and the step surface 56, and the other end surface 2b of the connecting member 2 and the step surface 71.
Is equal to the distance L3 between
The length L4 of the connecting member 2 is, for example, 202 mm.
To be chosen.

Such a connecting member 2 is made of, for example, chromium molybdenum steel, and is preferably JIS G 41.
05 SCM 435 (Brinell hardness HB =
269-331) is selected.

FIG. 4 is a plan view showing the receiving portion 6, and FIG. 5 is a sectional view taken along the section line VV of FIG. The receiving portion 6 is formed in a short cylindrical shape, an insertion hole 78 is formed along the axis 76 of the receiving portion 6 through which the lock pin 19 is inserted, and the outer screw 43 of the connecting member 2 is screwed vertically to the axis 76. A screw hole 75 is formed. At one end of the screw hole 75, there is formed a fitting portion 79 which has a receiving surface 77 facing the stepped surface 71 of the connecting member 2 and into which a part of the second intermediate portion 55b is fitted.
Such a receiving part 6 is made of, for example, a chrome molybdenum steel material, preferably SCM435 defined in JIS G 4105 is selected, and the shore hardness HS is adjusted to about 40 to 48, and the fitting recess 9 is further provided. The arc-shaped outer peripheral surface 74 that is in sliding contact with is subjected to induction hardening to have a Shore hardness HS of about 60 to 75. As described above, the receiving portion 6 and the connecting member 2 are received by fitting a part of the second intermediate portion 55b into the fitting portion 79 while the outer screw 43 of the connecting member 2 is screwed into the screw hole 75. The portion 6 can securely hold the connecting member 2.

The outer diameter D5 of the receiving portion 6 is selected to be, for example, 85 mm, and the thickness L8 is selected to be, for example, 64 mm.

FIG. 6 is a sectional view showing the support member 7, FIG. 7 is a plan view of the support member 7, and FIG. 8 is a front view of the support member 7. A substantially cylindrical recessed fitting recess 9 into which the receiving portion 6 is fitted is formed in the jaw-like portion 11 of the support member 7, and the second intermediate portion 55b of the connecting member 2 is connected to this fitting recess 9. A rectangular recess 81 into which is fitted is formed. This recess 81
Has a bottom surface 84 and a pair of side walls 82 and 83 that rise substantially vertically from the bottom surface 84.
6, an inclined surface 83a that is inclined downward in FIG. 6 is formed, and the side walls 82 and 83 are inclined surfaces 82a that are inclined in directions away from each other as they approach the one end surface 85 of the support member 7. , 83a are formed respectively, and inclined surfaces 82b, 83b are formed above the side walls 82, 83 in FIG. Thus, the inclined surfaces 82a, 83a, 84a, 82b, 83
Since b is formed, when the second intermediate portion 55b of the connecting member 2 is fitted in the recess 81 and a stress such as twisting or bending acts on the connecting member 2, the second intermediate portion 55b is formed.
The side surfaces 66, 67 and the bottom surface 65 formed on the bottom surface can allow torsion and bending stress to some extent without coming into contact with the support member 7.

The receiving portion 6 and the supporting member 7 are provided with a lock pin 19
Since the receiving portion 6 in the form of a short cylinder is fitted into the fitting recess 9 recessed in the form of a short cylinder,
The receiving portion 6 is also supported by the inner peripheral surface 86 of the fitting recess 9 of the support member 7 so as to be angularly displaceable. Since the receiving portion 6 is thus supported by the lock pin 19 and the inner peripheral surface 86, the large shift force from the shift driving member 3 can be reliably transmitted to the first intermediate roll 89.

The base portion 47 of the support member 7 is formed with an insertion hole 41 which penetrates the base portion 47 and inserts the fitting recess 9 and the sleeve 8 side of the shaft coupling 4 into the lubricating oil supply hole of the connecting member 2. 1
The lubricating oil supplied from 8 is introduced into the sleeve 8 of the shaft coupling 4.

An outer screw 53 is formed on the base portion 47 of the support member 7 so that one end of the sleeve 8 in the axial direction is fitted therein, and an inner screw is formed at one end of the sleeve 8 in the axial direction so as to be screwed into the outer screw. To be done. In the state where the sleeve 8 is screwed to the support member 7, the base portion 47 and the sleeve 8 of the support member 7 extend in parallel to the axis of the shaft coupling 4 from the base portion 47 to the threaded portion of the sleeve 8 and the support member 7. When the screw 54 is formed and the support member 7 and the sleeve 8 are screwed together, the inner screw 5
A set screw 20 is screwed onto the screw 4 to position the support member 7 and the sleeve 8 and prevent the support member 7 and the sleeve 8 from loosening.

With the head 21 of the lock pin 69 inserted through the through hole 22, the support member 7 and the head 21 are extended between the support member 7 and the head 21 in parallel to the axis of the lock pin 19. An inner screw 73 is formed, and a set screw 50 is screwed into the inner screw 73 with the head portion 21 of the lock pin 19 inserted into the through hole 22. In this way lock pin 1
9 can be prevented from coming off and prevented from rotating.

Such a supporting member 7 is made of, for example, nickel chrome steel material, and preferably JIS G 410.
It consists of SNC 236 specified in 2 and has Shore hardness H
S = 33 to 41 is conditioned. The axial length L9 of the support member 7 is selected to be 161 mm, for example, and the outer diameter D6 is set.
Is selected to be 127 mm, for example.

FIG. 9 is a sectional view showing a state in which the roll shift device 1 is connected to the Sendzimir cold rolling mill 81.
FIG. 10 is a system diagram showing an arrangement structure of each roll of the Sendzimir cold rolling mill 81. A 20-high Sendzimir cold rolling mill, which is a typical multi-high reversing cluster type cold rolling mill 81
Are arranged on the rolling mill main body 82 and on the upstream side and the downstream side of the rolling mill main body 82 in the sheet passing direction D1 or D2, respectively, and the reels 84 and 8 around which the metal strip 83 as the material to be rolled is wound.
5 and a pair of deflector rolls 86, 87 and the like. The metal strip 83 is mainly made of a normal steel strip, a special steel strip and a stainless steel strip, and a stainless steel strip having a thickness of 0.5 mm or less and 0.2 mm or more is referred to as a cold rolling object. To do.

The rolling mill main body 82 has a pair of upper and lower small-diameter work rolls 88a, 88b that abut the metal strip 83, and two upper and lower first intermediate rolls 89a, 89b, 89c that support the work rolls 88a, 88b. , 89d, three upper and lower second intermediate rolls 90a to 90f for supporting the respective first intermediate rolls 89a to 89d, and each second intermediate roll 90.
It has four upper and lower backup rolls 91a to 91h respectively supporting a to 90f. These work rolls 88a and 88b, the first intermediate rolls 89a to 89
d, the second intermediate rolls 90a to 90f, and the backup rolls 91a to 91h are provided in the mill housing 92, and the contact pressure to the second intermediate rolls 90a to 90f due to the change in the crown of the backup rolls 91a to 91h, and the first intermediate roll. The shift amount of the rolls 89a to 89d in the axial direction is set to the metal strip 83 between the work rolls 88a and 88b supported by the first intermediate rolls 89a to 89d.
Each work roll 8 is formed into a target shape based on the shape before or after passing, or before and after passing.
It is configured to control the rolling load applied to the metal strip 83 by 8a and 88b.

A roll shift device 1 is provided on one side of the Sendzimir cold rolling mill 81. This roll shift device 1 has a fixed position, for example, the second intermediate roll 9
Of the 0a to 90f, the second intermediate rolls 90a and 90 which are drive rolls arranged on both sides in the sheet passing directions D1 and D2.
It is fixed to the side wall 94 of the speed reducer 93 for rotationally driving the c, 90d and 90f. The roll shift drive 1 basically includes a shift device main body 95 including one driving member 138a and one driving member 138b and one driving member 138a and 138b.
Drive means 96 for transmitting the rotational force to the two, upper and lower two shift drive members 3a to 3d, and each shift drive member 3a to 3d.
Shift driving means 60 including universal joints 98a, 98b connecting one longitudinal end of each shift driving member 138a, 138b, the other longitudinal end of each shift driving member 3a-3d, and each first intermediate roll 89a. Shafts 4a to 4d and connecting members 2a to 2d that rotatably connect the shaft shifters 1 to 89d on the side of the roll shift device 1 in the axial direction.
d, and at least the shift device main body 95, the shift drive members 3a to 3d, and the housing 100 that houses the universal joints 98a and 98b. With such a roll shift device 1, two upper and lower first intermediate rolls 89a are provided.
The upper two and the lower two are alternately arranged for ~ 89d, for example, 200
The stroke of mm is shift-driven at 2 mm / sec.

FIG. 11 is an enlarged sectional view showing the internal structure of the roll shift device main body 1, and FIG. 12 is a front view of the roll shift device main body 1 seen from the right side of FIG. The shift device main body 95 includes a casing 103 and radial bearings 104a, 104b; 105 inside the casing 103.
a, 105b and thrust bearings 106a, 106b;
Nuts 109a and 109b rotatably supported via 107a and 107b, and inner threads 108a and 108b are engraved on the inner peripheral surface, and nuts 109a and 109b, respectively.
The driving members 138a and 138b screwed to the b, and one side portion of the casing 103 on the rolling mill main body 82 side are fixed, and the bearing metals 147a and 147b and the respective keys 148.
end plates 110a and 11 to which a and 148b are respectively attached
0b and the end plates 110 of the nuts 109a and 109b.
a and 110b, the sprocket wheels 111a and 111 fixed to the respective ends on the side opposite to the side on which the a and 110b are provided.
b.

Each sprocket wheel 111a, 111b
Includes a chain 112a extending from the drive means 96,
112b are respectively wound and stretched, and the rotational force applied by the chains 112a and 112b is transmitted to the nuts 109a and 109b via the sprocket wheels 111a and 111b, and the driving members 1
38a and 138b are axially driven to reciprocate while being stopped by the keys 148a and 148b.
Note that drive shafts 119a to 119d for rotationally driving the four second intermediate rolls 90a, 90c, 90d, and 90f are provided around the drive members 138a and 138b.

FIG. 13 is a system diagram for explaining the structure of the driving means 96. First, a configuration for driving the driving member 138a arranged above will be described. The rotation torque from the hydraulic motor 113a is calculated by the torque limiter 1
14a limits the set value to, for example, 6.4 kg · m, and speed reducer 115a limits the value to 533 rp, for example.
The rotation speed is reduced from m to about 26.7 rpm. A sprocket wheel 117a is fixed to the output shaft 116a of the speed reducer 115a.
The chain 112a is wound around the nut 1
The rotational force is transmitted to the sprocket wheel 111a fixed to 09a, whereby the nut 109a is rotationally driven about the axis while reversing every one stroke in both directions indicated by arrows G1 and G2.
Can be driven to reciprocate in the directions of arrows F1 and F2.

The other lower nut 109b
Has a configuration similar to that of the above-described upper nut 109a, the rotational force is transmitted in the opposite direction from the hydraulic motor 113b, and the two-way H1, while alternately reversing the rotational direction in the opposite direction with respect to the upper nut 109a. It is rotationally driven by H2, and the same reference numerals are added to the corresponding parts with the subscript b. The inner threads 108a and 108b formed on the inner peripheral surfaces of the nuts 109a and 109b have the same screw advancing direction. In this way, the driving means 96 causes the sprocket wheels 111a and 111b and the nuts 109 to be rotated.
At the same time, a and 109b are rotationally driven in the opposite directions and while alternately reversing the rotation directions.

FIG. 14 is a perspective view showing the driving member 138a. The driving member 138a has a shaft 121 having a substantially cylindrical shape, and a connecting head 122 integrally formed at one axial end of the shaft 121. The shaft 121 has an inner screw 108 of the nut 109a near the other end in the axial direction.
A screw part 124 in which an outer screw 123 screwed into a is engraved.
And a guide portion 125 that is connected to the connecting head 122 and has a key groove 149a formed in a straight line from the connecting head 122 toward the screw portion 124; and a guide portion 125 that is coaxially connected to the screw portion 124 and the guide portion 125 and that has an inner screw 108a. In order to avoid contact with each other, a small diameter portion 126 having a smaller diameter than the screw portion 124 and the guide portion 125 is provided. The other lower drive member 138b is configured similarly to the above-described drive member 138a.

The connecting heads 122 of the driving members 138a and 138b are connected to the shift driving members 3a to 3d which form a pair above and below by the universal joints 98a and 98b.

FIG. 15 shows a universal joint 98 arranged above.
It is a top view which notches and shows a partially. Drive member 13
The horizontal pin 129 is inserted into the pin hole 128 formed in the connecting head 122 of 8a, and both ends in the axial direction of the horizontal pin 129 are inserted into the pin holes 131a and 131b of the pair of connecting blocks 130a and 130b, respectively. 132a, 132b and nuts 133a, 133b
Is stopped by. Each connection block 130a, 13
0b is the end portion 134a of the shift driving members 3a, 3b,
U-shaped fitting portions 135a and 135 into which 134b fits
The vertical pin 1 is provided on each of the fitting portions 135a and 135b.
Pin holes 137a through which 36a and 136b are inserted,
137b is formed at two places above and below each of the fitting portions 135a and 135b.

Each end 13 of each shift drive member 3a, 3b
4a and 134b are formed with pin holes 139a and 139b, and the fitting portions 135a and 135b have end portions 134a and 134b.
The vertical drive pins 137a, 137b; the vertical pins 136a, 136b are respectively inserted in the vertically communicating pin holes 137a, 137b; And is connected so that it can be angularly displaced about the vertical axis.

Such a universal joint 98a is constructed similarly to the universal joint 98b arranged below the other.
Each drive member 1 is formed by these universal joints 98a and 98b.
38a, 138b and the respective first intermediate rolls 89a to 89d are connected to each other to thereby provide the work rolls 88a, 88, respectively.
Due to a change in the thickness of the metal strip 83 passed between b or a change in the rolling load, the work rolls 88a and 88b are displaced in the vertical and horizontal directions and the crown is changed, so that the first intermediate rolls 89a to 89d move. Even if it is displaced, the displacement is prevented from being transmitted to the drive members 138a and 138b.

Next, the operation will be described. The metal band 83 is formed by the roll shift device 1 having the above configuration.
When the cold rolling is started by passing the work roll between the work rolls 88a and 88b, the first intermediate rolls 89a and 89b move to the position shown in FIG.
6 (1) moves from the retracted position shown in FIG. 6 (1) to the forward position shown in FIG.
c and 89d are shown in FIG. 1 from the forward position shown in FIG.
6 (2) is displaced to the retracted position. The shift amount of each of the first intermediate rolls 89a to 89d at this time is 200 mm
It is. Therefore, the widthwise opposite end portions 83a and 83b of the metal strip 83 between the work rolls 88a and 88b are formed by the work rolls 88a and 89d of the first intermediate rolls 89a to 89d.
The rolling load is increased or decreased by alternately repeating the pressurization release of the contact pressure at both axial end portions of 88b, and the shift speed, the shift amount, the rolling speed, and the rolling load of each of the first intermediate rolls 89a to 89d are set to By controlling the shape of the strip 83 to be the target shape, the shape control effect of the metal strip 83 is enhanced compared to the case where only the control of the widthwise distribution of the rolling load due to the crown change of each backup roll 91a to 91h is performed. can do.

FIG. 17 is a graph showing the relationship between the rolling speed and the shift speed for each rolling load P1 to P4. Line P
No. 1 has rolling load of 220 tons, line P2 has 514 tons
n, line P3 is 834 ton, line P4 is 1088
The relationship between the rolling speed and the shift speed when cold rolling is performed at ton is shown respectively. According to these lines P1 to P4, when the metal band 83 is a metal band having a thickness of 0.5 mm or less, which is called a typical stainless thin product, the typical ear defect and belly elongation, which are defective in shape, are effectively corrected. It has been confirmed by the present inventors that this is possible. This ear extension means that wrinkles are generated in the range of about 250 mm inward from both widthwise ends 83a and 83b of the metal strip 83,
This is because such wrinkles cannot be corrected even if bright annealing is performed in the subsequent bright annealing step. Therefore, the shape of the metal strip 83, especially a high degree of flatness, must be achieved so that the shape required in the next step can be obtained during cold rolling, and such shape correction is performed in accordance with the present invention. 1 makes it possible to shift the intermediate rolls continuously during rolling and reliably achieve this.

In the above-described embodiment, the single-base levers type 20-high Sendzimir type cold rolling mill was described as the cold rolling mill, but other cold rolling mills such as a tandem type 20-high cluster type cold rolling mill can be used. On the other hand, the present invention can be preferably implemented.

Further, the connecting member of the present invention is not limited to connecting the shaft joint of the first intermediate roll and the shift driving member, but can be suitably implemented for connecting other shafts.

[0048]

According to the present invention, the shift driving member of the shift device is connected to one axial end of the intermediate roll of the rolling mill via the shaft joint. When the shift driving member is driven to reciprocate in the axial direction, the displacement is transmitted to the intermediate roll via the shaft joint, and the intermediate roll is allowed to rotate with respect to the shift driving member by the shaft joint. The displacement is driven in the direction, and the shape of the metal strip rolled by the rolling mill, in particular the flatness, is controlled so as to reach the target value required in the next step. One end of the shift driving member in the longitudinal direction and the shaft joint are connected by a connecting member, and the connecting member has a weak portion in which a notch is formed over the entire circumference in the circumferential direction. Since the notch is formed in the fragile portion of the connecting member in this manner, the cross-section perpendicular to the axis of the connecting member suddenly changes and becomes small in the fragile portion. Therefore, when excessive bending or torsional stress is applied to this connecting member, the stress distribution of the connecting member is such that the stress locally increases in the fragile portion and stress concentration occurs in the fragile portion. Therefore, when bending or twisting stress occurs in the intermediate roll, the shaft joint, the connecting member and the roll shift driving member due to the displacement of the intermediate roll or the rotation failure of the shaft joint, stress concentration occurs in the fragile portion of the connecting member and is fragile. The part is broken. This prevents these bending and torsional stresses from being transmitted to the roll shift device via the roll shift driving member, prevents damage and uneven wear of the roll shift device, and performs a smooth shift operation.

Further, according to the present invention, one end of the connecting member is screwed to one end of the shift driving member, and the other end of the connecting member is screwed to the receiving portion of the shaft joint, thereby connecting the connecting member and the shaft joint. Is rotatably connected about an axis perpendicular to the axis of the shaft coupling. Therefore, when the connecting member breaks at the fragile portion, each of the remaining connecting members screwed to the shift driving member and the receiving portion is removed, and a new connecting member is screwed to the shift driving member and the receiving portion. The shift drive member and the shaft coupling can be connected to each other again.
When the connecting member is thus broken, only the connecting member needs to be replaced, and the intermediate roll, the shaft coupling and the shift driving member do not need to be replaced. Further, since the receiving portion to which the other end of the connecting member is screwed is pin-coupled to the shaft joint main body so as to be rotatable around an axis line perpendicular to the shaft line of the shaft joint, it is perpendicular to the shaft line of the shaft joint of the intermediate roll. It is possible to allow a displacement about an axis line, which allows bending stress about an axis line perpendicular to the axis line of the shaft coupling. Further, since the receiving portion is pin-coupled to the shaft coupling body while being fitted in the fitting recess, the force in the shift direction transmitted to the shaft coupling through the shift driving member is only the pin for pin coupling. Instead, since it is transmitted to the shaft coupling by the receiving portion and the fitting recess, a large force in the shift direction can be transmitted to the intermediate roll without damaging the shaft coupling.

Further, according to the present invention, since the lubricating oil supply hole is formed in the connecting member, when the lubricating oil introduced from the oil passage formed in the shift driving member is supplied to the lubricating oil supply hole. , This lubricating oil rotates the sliding contact surface between the receiving part and the fitting recess, which are pin-connected in the fitting recess of the shaft coupling body, the pin of the pin connection, and the intermediate roll. It is supplied to the rotating part of the shaft joint that is freely connected, and the receiving part and the shaft joint body and the shaft joint body and the intermediate roll can be smoothly and rotatably connected. Thus, the lubricating oil can be stably supplied to the shaft coupling by the lubricating oil supply hole and the oil passage.

According to the present invention, the step surface formed on the connecting member and the receiving surface formed on the shift driving member are opposed to each other in a state where the connecting member is screwed into the screw hole of the shift driving member, The connecting member and the shift driving member are screwed and connected to each other with the holding ring interposed between the step surface and the receiving surface. Therefore, for example, a plurality of holding rings having mutually different thicknesses are prepared, and one of these holding rings is selected and fitted into an outer screw formed at one end of the connecting member, and the outer screw is attached to the shift driving member. When the connecting member is securely screwed and connected to the shift driving member, the position around the axis of the connecting member can be adjusted by screwing and connecting the connecting member and the shift driving member. When the pin is connected to the joint, the connecting member can be accurately positioned. Therefore, for example, when the connecting member is replaced, even if an error occurs around the axis line with the previous connecting member when a new connecting member is screwed, the pinching ring can be accurately adjusted by replacing the holding ring. Positioning around can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a part of a roll shift device 1 for rolling equipment according to an embodiment of the present invention.

FIG. 2 is a plan view showing a part of the roll shift device 1.

FIG. 3 is a cross-sectional view showing a state in which a shift driving member 3 and a connecting member 2 are connected.

FIG. 4 is a plan view showing a receiving portion 6.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4;

FIG. 6 is a cross-sectional view showing a support member 7.

FIG. 7 is a plan view of a support member 7.

8 is a front view of the support member 7. FIG.

FIG. 9 is a cross-sectional view showing a state in which the roll shift device 1 is connected to a Sendzimir cold rolling mill 81.

10 is a system diagram showing an arrangement state of rolls of the Sendzimir cold rolling mill 81 shown in FIG. 9. FIG.

11 is an enlarged cross-sectional view showing the internal structure of the roll shift device 1. FIG.

12 is a front view of the roll shift device 1 as viewed from the right side of FIG.

FIG. 13 is a system diagram for explaining the configuration of driving means 96.

FIG. 14 is a perspective view showing a driving member 138a.

FIG. 15 is a plan view showing a universal joint 98a arranged on an upper side with a part thereof cut away.

FIG. 16 is a diagram for explaining a shift operation of first intermediate rolls 89a to 89d, and FIG. 16 (1) shows an upper first roll.
FIG. 16B is a diagram showing a state in which the intermediate rolls 89a and 89b are in the retracted position and the lower first intermediate rolls 89c and 89d are arranged in the forward movement position, and FIG. 16B shows the upper first intermediate rolls 89a and 89b. Is a forward position, and the lower first intermediate rolls 89c and 89d are arranged in the retracted position.

FIG. 17 is a graph showing the relationship between rolling speed and shift speed at each rolling load P1, P2, P3, P4.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll shift device 2 Connecting member 3a-3d Shift drive member 4a-4d Shaft coupling 5 Axis of connecting member 6 Receiving part 7 Supporting member 8 Sleeve 9 Fitting recess 11 Jaw-like part 12 Weak part 13 Notch 14 Shift drive member Longitudinal direction one end part 15 one end part of the connecting member 16 the other end part of the connecting member 17 oil passage 18 lubricating oil supply hole 19 lock pin 55 intermediate part 56,71 step surface 58,77 receiving surface 59 clamping ring 60 roll shift means 81 Sendzimir cold rolling mill 82 rolling mill body 83 metal strips 88a, 88b work rolls 89a-89d first intermediate rolls 90a-90f second intermediate rolls 91a-91h backup rolls 98a, 98b universal joint

Claims (4)

[Claims] 1. An axial end of an intermediate roll of a rolling mill having a pair of upper and lower work rolls through which a metal strip is threaded, an intermediate roll supporting each work roll, and a backup roll supporting the intermediate roll. One end portion in the longitudinal direction of the shift drive member of the shift drive means provided at a predetermined fixed position is rotatably connected to the portion via a shaft joint, and the force of the shift drive member in the shift direction is transmitted to each intermediate roll. In the roll shift device for rolling equipment, the one end of the shift driving member in the longitudinal direction and the shaft coupling are connected to each other by a connecting member having an fragile portion in which a notch is formed in the outer peripheral portion along the entire circumferential direction. A roll shift device for rolling equipment, which is characterized in that 2. The connecting member has external threads formed at both ends in the axial direction with respect to the fragile portion, and an external thread formed at one end of the connecting member is provided at one longitudinal end of the shift driving member. A screw hole to be screwed is formed, and the shaft joint is rotatable around an axis line perpendicular to the axis line of the shaft joint in a state of being fitted in the shaft joint body having a fitting recess. The roll shift device for rolling equipment according to claim 1, further comprising: a receiving portion that is pin-coupled and that has a screw hole into which an outer screw formed at the other end of the connecting member is screwed. 3. The connecting member is formed with a lubricating oil supply hole extending along an axis thereof, and the shift driving member is formed with an oil passage for guiding lubricating oil to the lubricating oil supply hole. The roll shift device for rolling equipment according to claim 2. 4. A plane perpendicular to the axis of the connecting member is provided between the intermediate portion between the external threads formed at both ends of the connecting member and the external screw formed at one end of the connecting member. A stepped surface extending annularly is formed at the opening end where the screw hole of the shift driving member opens.
An annular receiving surface facing the step surface is formed in a state in which an external screw formed at one end of the connecting member is screwed, and a holding ring is interposed between the receiving surface and the step surface. The roll shift device for rolling equipment according to claim 2 or 3, characterized in that.