JPS5828648Y2 - Spindle support device in rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spindle support device for a rolling mill.

First, the structure of a rolling mill and a conventional support device will be explained based on FIGS. 1 to 5.

Reference numeral 1 denotes a movable trolley that is movable on a trolley guide rail 2 between a rolling position A and a position B horizontally and laterally distant from the rolling position A, and a roll support 3 on this trolley 1 is equipped with upper and lower bearings 4. A pair of vertical steel bar rolling rolls 6 are connected to the roll shaft 5.
is rotatably provided.

The pair of rolls 6 have a plurality of calibers 7 formed of circumferential grooves spaced at regular intervals in the axial direction.

Reference numeral 8 denotes a transmission spindle movable in the direction of the axis of the roll shaft 5 of the pair of rolls 6 at the rolling position A, and a thrust bearing 12 is mounted on a support member 11 vertically disposed on a portal frame 10 on the case body 9. The spindle 8 is supported by a transmission gear 13 that can only rotate at a fixed position.
The zero cylinder shaft 14 is fitted onto the outside.

The cylindrical shaft 14 and the spindle 8 are spline-coupled.

The transmission gear 13 is supported by a crossbeam 15 within the case body 9, and is operatively connected to a drive device (not shown) via an intermediate gear 16 pivotally attached to the crossbeam 15.

As shown in FIGS. 2 and 3, at the passive end of the roll shaft 5.

A shaft portion 18 having different diameters having notches 17 on both sides is provided,
Further, the transmission end of the spindle 8 is provided with a recessed hole 19 that allows the shaft portion 18 of different diameter to fit therein, so that the two can be fitted and removed by relative movement only in the axial direction. There is.

Reference numeral 20 denotes a cylinder device that moves the spindle 8 in the axial direction, and the cylinder body 2 is fixed to the support member 11.
1 and.

It consists of a piston rod 22 that passes through the cylinder body 21 in the vertical direction, and the lower end of the piston rod 22 is fixed on the case body 9 and the upper end is fixed on the gate-shaped frame 10, respectively.

23 is a brake for braking each roll shaft 5;

At one end of the roll support stand 30 on the moving direction side, a fourth
As shown in the figure, a pair of upper and lower arm rods 26 that form a recessed portion 25 that fits into the elevating body 24 are fixedly provided.

The elevating body 24 supports the pair of rolls 6 so as to be movable in the vertical axial direction, and is fitted into a vertical guide rail 27 attached to the side of the case body 9 so as to be movable up and down.

28 is a screw shaft in the vertical direction that is screwed into the elevating body 24;
A gear 29 such as a worm wheel is externally fitted onto the upper end of the screw shaft 28 by spline connection, and this gear 29 is received by thrust bearings 31 on both upper and lower sides within the gear case 30.

Therefore, this gear 29 only allows movement of the screw shaft 28 in the axial direction, rotates in a fixed position, and transmits rotational force to the screw shaft 28.

A gear 32 such as a worm gear meshes with the gear 29, and this gear 32 is coupled to a drive device 34 such as a motor via a drive shaft 33.

Note that the gear 29 may be keyed.

A thrust bearing 35 is provided on a support frame 36 fixed to the side of the case body 9, and supports the screw shaft 28 at a position where it can rise relative to the gear 29.

The bogie guide rail 2 includes a pair of left and right fixed rail sections 37 at position B and a pair of left and right movable rail sections 38 at rolling position A.

As shown in FIG.
The swing arm 41 is fixed to the upper end of a swing arm 41 that is swingably supported between a position where the carriage 1 is received and a position where the carriage 1 is allowed to descend.

The movable rail portion 38 is provided at the lower end of each swing arm 41.
A piston rod 43 of a cylinder device 42 that is extendable and retractable in a direction perpendicular to the cylinder device 42 is pivotally connected, and the rear end of the cylinder device 42 is pivotally connected to a member 45 attached to a support member 44, respectively.

Therefore, the movable rail section 38 can be opened and closed by the expansion and contraction of the cylinder device 42, and allows the carriage 1 to be lowered.

A stop bar 46 is provided on the support member 44 to restrict the swing arm 41 to a posture for receiving the truck 1.

Reference numeral 47 denotes a cylinder device for moving the cart 1 between position B and rolling position A, and the tip of the piston rod 48 has an engagement that can freely engage with an engaged portion (not shown) of the cart 1. A joint 49 is provided.

50 is a clamp device that clamps the arm rod 26 from both left and right sides.

Next, I will explain how it works.

First, when moving one cart 1 to rolling position A,
The vertical position of the elevating body 24 is made to correspond to the position of the recessed part 25 of the arm rod 26, and the spindle 8 is raised to the position shown by the imaginary line in FIG. 1 by the cylinder device 20. is extended and its engaging portion 49 is engaged with the trolley 1.

From this state, the cylinder device 47 is contracted and the carriage 1 is introduced from position B to rolling position A.

This is because the positions of the elevating body 24 and the recessed portion 25 of the arm rod 26 are set.

The lifting body 24 automatically fits into the recess 25, and therefore, if a coupling such as a lubricating oil system is provided between the lifting body 24 and the arm rod 26, automatic coupling between them is possible. .

After this, the engaging portion 49 is removed and the cylinder device 47 is contracted to its original state.

Next, in this case, the pass line of one of the multiple calibers 7 in the axial direction is set.

In order to set the caliber 7 below the pair of rolls 6 to the pass line, the drive device 34 is driven in normal rotation and the screw shaft 28 is rotated clockwise.

Then, the elevating body 24 rises due to the rotation of the screw shaft 28, so that the truck 1 separates from the movable rail portion 38, the roll 6 rises, and the caliber 7 can be set.

Conversely, in order to set the upper caliber 7 to the pass line, first move the truck 1 away from the movable rail section 38 as described above, then first contract the cylinder device 42 and move the fifth caliber 7 to the pass line. As shown by imaginary lines in the figure, each movable rail section 38 is opened on both sides to a position that allows the carriage 1 to descend, and then the drive device 34 is reversed to lower the carriage 1, thereby adjusting the vertical position of the roll 6. Adjust and set the pass line to the required caliber 7.

Incidentally, when a required caliber 7 is worn and deformed due to the rolling of the steel bar, and the pass line is set for another caliber 7, the same procedure as described above is performed.

Next, connect the spindle 8 and the roller shaft 5.

The drive device rotates the roll 6 in the direction of rolling the steel bar, and in this case the connection is made while the drive device is activated and the spindle 8 is rotated.

This is done by lowering the spindle 8 using the cylinder device 20.

The lower end surface of the recessed hole 19 of the spindle 8 is the different diameter shaft portion 1.
When it comes into contact with the upper end surface of 8.

If the rotation on the roll 6 side is heavy, the positions of the two will align while the recessed hole 19 side rotates with both surfaces in contact with each other, and by further lowering the spindle 8, the different diameter shaft portion 18 will open the recessed hole. 19.

If the rotation on the roll 6 side is very light, 80 rotations of the spindle will be transmitted to the roller shaft 5 and the roller shaft 5 will rotate while the two surfaces remain in contact with each other, making it impossible to connect the two.

So in this case. The roller shaft 5 is rotated by the brake 23.
After applying the brakes, proceed as described above.

Position caliber 7 and spindle 8 as described above.
When the connection between the roller shaft 5 and the roller shaft 5 is completed, the driving device is connected and driven to rotate the roll 6 in the rolling direction, and the steel bar is passed through the caliber 7 located on the pass line and the steel bar is rolled.

Next, when returning trolley 1 to position B, as described above,
is lower than the movable rail section 38 position,
First, the drive device 34 is driven in normal rotation, and the elevating body 24 is moved to the screw shaft 2.
8 to lift the truck 1 above the movable rail section 38, then close the movable rail section 38 to its original state and lower the truck 1 onto the movable rail section 38.

This lowering of the truck 1 to the movable rail section 38 is as follows. Screw shaft 28
This is done by rotating counterclockwise.

At this time, even if the wheel 40 contacts the movable rail portion 38, the screw shaft 28 is still rotating counterclockwise.
The abutment between the two restricts the descent of the elevating body 24, and therefore, the rotation of the screw shaft 28 causes the screw shaft 28 to move upward.

If the drive device 34 is stopped while the screw shaft 28 is rising, the thread breakage of the screw shaft 28 can be prevented.

In the conventional rolling mill as described above, when the carriage 1 is moved up and down to align the caliber 7 with the pass line, the spindle 8 must also be moved up and down along with the movement.

This is done when moving the trolley 1 via the elevating body 24 or the like.

The cylinder device 20 had to be synchronized, and its operation was complicated.

In addition, when replacing the trolley 1 by running it, the spindle 8 is lifted up relative to the roll shaft 5 and separated, and the separated state is supported by the cylinder device 20 to support the spindle 8.
The large cylinder device 2 must be prevented from falling.
0 is required, and the structure of the upper part is complicated by the presence of the cylinder device 20 and the like.

The present invention proposes a spindle support device for a rolling mill that can solve the above problems, and one embodiment thereof will be described below with reference to FIGS. 1 and 6 to 8.

That is, the present invention is as shown by the imaginary line in FIG.

A flange body 51 is provided in the middle of the spindle 8 which can be fitted onto and removed from the roll shaft 5 from above, and a support plate 52 which can be fitted into and removed from the side below the flange body 51 of the spindle 8 in the raised position is provided. A guide body 5 is provided for slidingly guiding the support plate 52.
3 and a moving cylinder device 54 are provided in the case body 9, which is a fixed part.

Note that in the present invention, the support member 11 and cylinder device 20 in FIG. 1 are omitted.

As shown in FIGS. 6 to 8, the guide bodies 53 are respectively attached to the lower ends of a pair of front and rear plates 55 which are vertically provided on the case body 9, and have guide grooves 56 on opposing surfaces.

The support plates 52 are slidable by being fitted between the guide grooves 56, and are provided in pairs on the left and right corresponding to the pair of spindles 8.

Further, a recess 57 is formed on the front surface of the support plate 52, and the support plate 52 can be fitted into and removed from the spindle 8 laterally through the recess 57.

The width l of this recessed portion 57 is set to be larger than the spindle diameter d, but smaller than the collar body diameter.

Reference numeral 58 denotes a pair of left and right rotating shafts supported by the plate body 55, which are rotatable around a horizontal axis 58A.

A pair of front and rear arm rods 59 are connected to the rotating shaft 58, and a pin 61 attached to the support plate 52 engages with a notch 60 formed at the lower end of these arm rods 59.

In addition, a lever 62 and a plate body 55 are attached to the end of the rotating shaft 58.
The cylinder device 54 is provided between the pin 63 and the pin 63 attached to the cylinder.

In normal operating conditions, the weight of the spindle 8 side is supported by the roll shaft 5, so when the cart 1 is moved up and down to align the caliber 7 with the pass line,
The spindle 8 automatically performs the following movement.

When replacing the truck 1, first the truck 1 is raised to position the collar body 51 above the support plate 52.

Next, the cylinder device 54 is contracted, and the support plate 52 is advanced via the lever 62, rotating shaft 58, and arm rod 59.

This forward movement is guided by the guide body 53, and as a result, as shown in FIGS. 6 and 7, the spindle 8 is externally fitted into the spindle 8 by forming a peak s7.

When the trolley 1 is lowered in this state, the flange body 51 moves to the support plate 5.
2, the descent of the spindle 8 is stopped, only the roll shaft 5 is lowered, and the two are separated.

This allows the trolley 1 to be replaced.

Since the spindle 8 is supported by the support plate 52 via the collar body 51, and the support plate 52 is supported by the guide body 53, the spindle 8 is safely supported.

After a new truck 1 is transferred, the truck 1 is raised to engage the roll shaft 5 and the spindle 8, and this lifting lifts the spindle 8 as shown in FIGS. 6 and 7.

After the cylinder device 54 is extended and the support plate 52 is disengaged and moved, the truck 1 is lowered to be ready for operation.

As described above, according to the present invention, when the caliber is moved up and down on the cart to match the pass line, the spindle automatically follows up and down, so it is necessary to synchronize the cylinder device that moves up and down. Since the spindle is supported by the support plate through the collar body when replacing the truck, the cylinder device that moves the support plate laterally can be small and can be easily operated. Support can be safely performed on the fixed part side via the support plate and the guide body, and furthermore, the upper structure of the spindle can be simplified.

[Brief explanation of the drawings] Figures 1 to 5 show a conventional example, with Figure 1 being a partially cutaway elevational view of the whole, and Figure 2 showing the connection between the roll shaft and the transmission shaft. 3 is a sectional view taken along the line X--X in FIG. 2, and FIG. 4 is an enlarged view of the main part of FIG. 1. Fig. 5 is a sectional view taken along the line Y-Y in Fig. 1, Figs. 6 to 8 show an embodiment of the present invention, Fig. 6 is a partially cutaway elevational view of the main part, and Fig. 7 is 8 is a sectional view taken along the line z-2 in FIG. 6. DESCRIPTION OF SYMBOLS 1...Moving trolley, 2...Bogie guide rail, 5...Roll shaft, 6...Roll for steel bar rolling, 7... Caliber 8...Spindle 9...Case body, 24...
・Elevating body, 34... Drive device, 51...
- Flange body, 52... Support plate, 53... Guide body, 54... Cylinder device, 56...
... Guide groove, 57 ... recess. 58...Rotation axis, 59...Arm rod.

Claims (1)

[Scope of utility model registration request] A flange is provided in the middle of the spindle that can be fitted and removed from above with respect to the roll shaft, and a support plate that can be fitted and removed from the side below the flange of the spindle in the raised position is provided, and this support plate A spindle support device for a rolling mill, characterized in that a guide body for sliding guidance and a cylinder device for movement are provided on a fixed part side.