JPH0324241Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The invention is installed on the entry side of a continuous hot rough rolling mill,
This invention relates to an anvil distance adjusting device for a press for continuous width reduction of hot slabs supplied for continuous hot rolling.

(Prior Art) Due to recent advances in continuous casting technology, so-called continuous cast slabs are often used as slabs supplied for continuous hot rolling due to their economic advantages. However, continuous casting slabs have the disadvantage that the width dimension is limited to some extent due to continuous casting operations. Therefore,
Conventionally, a vertical roll mill was arranged in a row of hot continuous rough rolling mills to perform so-called vertical and horizontal rolling to produce a wide variety of product widths, thereby adjusting the slab width. However, even with this rolling method, the width reduction efficiency was not sufficient, the width could not be adjusted over a very large range, and there were problems such as an increase in clot loss after rolling, so that it was not completely satisfactory.

Therefore, recently, a technique has been proposed as JP-A-59-101201 in which a press is installed on the entry side of a continuous hot rough rolling mill to continuously reduce the width of a hot slab. In this technique, the slab is intermittently fed between a pair of opposing anvils, and the anvils are moved back and forth to sequentially reduce the width of the slab.

The applicant of this utility model registration has also proposed a press device that allows the interval between the anvils to be freely adjusted during the press operation, thereby making it possible to easily change the rolling width within a single slab.

This device uses the rotation of the crankshaft to
The anvil is moved over a constant width via a connecting rod. In a press with this type of configuration, the rolling width of the anvil is always constant, so it is difficult to respond to changes in the slab width. When making slabs, etc.), it is difficult to change the width.

Therefore, the applicant of this utility model registration proposed the apparatus shown in FIGS. 5 to 7. That is, the inner block 2 holding the anvils 1, 1 facing each other inside the main body A,
2 will be provided. In the following, only one side will be explained due to left-right symmetry. Outside the inner block 2, outer blocks 3 are provided at intervals. This outer block 3
Pins 4, 4 are provided horizontally protruding from both sides (inlet side and outlet side), and one ends of connecting rods 5, 5 are pivotally connected. On the other hand, a crank portion 6c provided on a crankshaft 6 inserted through the main body A is rotatably fitted to the other end of the connecting rods 5,5.

Further, one ends of screw shafts 7, 7, 7', 7' are rotatably attached to the inner block 2 on the upper and lower sides of the entrance and exit sides, respectively. Each threaded shaft 7, 7, 7', 7' has a threaded portion 7a screwed into the outer block 3, and a spline portion 7b is provided at the other end. ', 8'.

As shown in FIG. 7, the gear devices 8, 8, 8', 8' incorporate gears 9, 10 that mesh with each other,
One gear 9 is the spline portion 7b of the screw shaft 7.
The other gear 10 is spline-fitted to the other gear 10, and a universal joint 11 is pivotally attached to the other gear 10. And the gear devices 8, 8 and 8' located above and below,
Universal joints 11, 11 of 8' are connected to universal joints 14, 14 attached to distribution devices 13, 13'(13' not shown) via universal joint shafts 12a, 12b, respectively. The distribution devices 13, 13' on both sides are connected to the universal joints 14, 14 at the top and bottom, respectively.
Gears 15a and 15b are provided, and both gears 1
A main drive gear 16 that meshes with gears 5a and 15b is located at the center. The main gear 16 is driven by an electric motor 17.

In the above device, the outer block 3 is moved by the connecting rods 5, 5 according to the amount of eccentricity of the crank part 6c by the rotation of the crankshaft 6, and the four threaded shafts 7, 7, 7' are attached to the outer block 3. ，
The inner block 2 connected at 7' is moved to move the anvil 1 and the width of the slab s to be rolled down is adjusted.
When the outer block 3 moves, the screw shafts 7, . . . also move together, but since the screw shafts 7 and the gear 9 are spline-fitted at the spline portions 7b, they move smoothly. Then, both electric motors 17 and 17' are driven to drive the main drive gear 16, and both gears 15a and 15 are driven.
b, each with a universal joint shaft 12
The gears 9, 9 are driven via a, 12b, and the screw shafts 7, 7, 7', 7' are rotated to rotate the inner blocks 2, 2.
The distance C between the outer blocks 3 and 3 is adjusted, and the distance B between the anvils 1 and 1 is adjusted.

(Problem to be solved by the invention) However, since the screw shafts 7, 7, 7', and 7' are provided in pairs on the input side and outlet side of the press, there are two drive systems for driving the husband and wife. It is provided. Therefore, the rotation angles of the screw shafts 7, 7' do not necessarily match due to differences in starting characteristics of the electric motors 17, 17', and if a rotation delay occurs in either of the screw shafts, the inner block 2 will tilt. This not only makes it impossible to hold the anvil 1 correctly, but also causes unreasonable force to be applied, such as twisting the screw shafts 7, 7', etc. Therefore, it was not possible to perform accurate width reduction, and there were also problems in terms of maintenance of the drive system.

In addition, in order to minimize the inertia GD ² of the drive system, it is advantageous to install multiple electric motors, separate the drive system, and drive each motor separately.
This is a necessary measure.

Therefore, an object of the present invention is to provide a press anvil distance adjusting device that can prevent the above-mentioned problem from occurring even if the drive system of the screw shaft is separated into a plurality of parts.

[Structure of the idea]

(Means for Solving the Problems) The press anvil distance adjusting device according to the present invention includes a pair of left and right outer blocks 3, 3 that reciprocate over a constant width by rotation of the crankshaft 6; A pair of inner blocks 2, 2 whose distance can be adjusted with respect to outer blocks 3, 3 that hold the anvil 1 located on the center side of the anvil 1 are screwed to the outer blocks 3, 3,
A plurality of screw shafts 7, 7, which are driven by a plurality of drive sources whose tips are rotatably attached to the inner blocks 2, 2,
. . , 7', 7', . . . and a mechanical coupling means E that connects the drive systems of the screw shafts 7, . . . and drives the plurality of screw shafts 7, .

(Function) In the present invention, when the outer blocks 3, 3 are reciprocated over a certain width by the rotation of the crankshafts 6, 6, the inner blocks 2, 2, which are connected by a plurality of threaded shafts 7, 7', move. The anvils 1 and 1 are moved back and forth with a constant width.

In addition, a plurality of screw shafts 7, .
To accurately hold anvils 1, 1 and smoothly move inner blocks 2, 2 without applying excessive force to a drive system.

(Embodiment) A first embodiment of the present invention will be explained based on FIGS. 1 and 2. The mechanical coupling means E is constructed as follows. That is, the gear boxes 18 and 18 are fixed at the center of the electric motors 17 and 17' sides of the distribution devices 13 and 13' installed on both sides (inlet and outlet sides), respectively. A main drive gear 16 installed in the distribution device 13, 13',
Bevel gears 19 and 19' are each pivotally attached to the tip of 16',
Bevel gears 20, 20' that mesh with the bevel gears 19, 19' are provided in the gear boxes 18, 18, and both bevel gears 20, 2
0' is pivotally attached to one connecting shaft 21.

Everything else is the same as before, so the same symbols are given.
The explanation will be omitted.

In the first embodiment, when the electric motors 17, 17' are driven, since the driving gears 16, 16' on both sides are mechanically connected by the connecting shaft 21 of the mechanical connecting means E, only one of the driving gears 16, 16' is driven. Even if there is a delay in the system, driving forces are mutually exchanged, and completely synchronized rotational drive can be applied to each screw shaft 7, 7, 7', 7'.

Other operations are the same as before.

Next, a second embodiment will be explained based on FIGS. 3 and 4. In this embodiment, the distance between the screw shafts 7, 7, 7', 7' is relatively short. The mechanical coupling means E in this case is constructed as follows. That is,
One gear device 8 is provided outside the main body A. The gears 9, 9 fitted into the spline portions 7b of the screw shafts 7, 7 on the input side mesh with the intermediate gears 22, respectively, and the gears 9, 9 fit into the spline portions 7b of the screw shafts 7', 7' on the output side. Similarly, gears 9' and 9' are intermediate gear 22'.
It meshes with the The main drive gears 16, 16' driven by the electric motors 17, 17' mesh with intermediate gears 22, 22', respectively, and the main drive gears 16, 16' mesh with and restrain the coupling gear 23.

The second embodiment is constructed as described above, and has main drive gears 16 and 1 driven by electric motors 17 and 17'.
6' are connected to each other with a connecting gear 23 interposed between them, so even if there is a delay in either one of the two electric motors 17, 17', the driving force can be transferred to and from each other and the motors can be completely Synchronized rotational drive is applied to each screw shaft 7,
..., 7', ... can be given.

Note that the number of coupling gears 23 is not one, but the number of coupling gears 23
Depending on the distance between 7 and 17', a plurality of them can be installed. In addition, the main drive gears 16, 16' and the gear 22,
A gear may be interposed between 22'.

[Effect of idea]

In the present invention, a plurality of screw shafts 7,...7',
...Since there is no difference in the rotation angle between them, the anvils 1, 1 are not tilted and no excessive force is applied to the drive system of the screw shaft, which is effective in preventing failure of the drive system.

[Brief explanation of the drawing]

FIG. 1 is a front view showing only the main parts of the first embodiment of the press anvil distance adjusting device according to the present invention;
The figures are a sectional view of the part indicated by the arrow in Fig. 1, Fig. 3 is a plan view of the second embodiment, Fig. 4 is a side view showing only the mechanical connection means, Fig. 5 is a front view of a conventional press, Figure 6 is a cross-sectional plan view along the line of Figure 5;
FIG. 7 shows an enlarged front view of a portion thereof. 1...Anvil, 2...Inner block, 3...Outer block, 6...Crankshaft, 7, 7'...Screw shaft, E...Mechanical connection means.

Claims (1)

[Scope of utility model registration request] The distance can be adjusted with respect to the pair of left and right outer blocks 3, 3 that reciprocate over a constant width with the rotation of the crankshaft 6, and the outer blocks 3, 3 that hold the anvil 1 located at the center of the outer blocks 3, 3. A plurality of screw shafts 7, 7, . . . are screwed into a pair of inner blocks 2, 2 and outer blocks 3, 3, and are driven by a plurality of drive sources whose tips are rotatably attached to the inner blocks 2, 2. ，
7', 7'... and a mechanical coupling means E that connects the drive systems of the screw shafts 7, . . . and drives the plurality of screw shafts 7, . . . in synchronism.