JPS5941824B2 - Drive device for mold vibration in continuous casting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold vibration drive device in continuous casting equipment, and in particular, to a mold vibration drive device that can reliably change mold vibration amplitude during casting.

In continuous casting, in order to improve the quality of the slab to be cast, especially the surface of the slab, the vibration amplitude of the mold must be set to an appropriate value according to the steel type, slab size, casting speed, vibration amplitude cycle, etc. Adjustments are being made to.

In addition, in recent years, in order to further improve productivity, which is said to be the biggest advantage of continuous casting, we have started to change the size during continuous casting of different steel types, and change the vibration amplitude of the mold during casting. Therefore, in continuous casting equipment, a variable mold vibration amplitude device is indispensable during casting. Conventionally, hydraulic and mechanical drive devices have been provided, but both have various drawbacks.

That is, hydraulically driven devices require sophisticated control using a servo system, which makes them expensive, and there are also problems such as lack of stability in function due to the servo system, especially after the equipment is stopped for a long period of time.

A mechanical mold drive device for variable vibration amplitude transmits power from a prime mover, worm, worm wheel, eccentric shaft, eccentric sleeve, connecting rod, and mold vibration frame, and a disk is installed in the eccentric ring and eccentric sleeve. There is a device that adjusts the vibration amplitude of the mold by changing their relative position using a pin or a separate screw or worm mechanism.This device is inexpensive and stable, and the vibration amplitude can be adjusted when the equipment is stopped. The drawback is that it must be done manually on the machine side.

In addition, as a mechanical type, a moving fulcrum is installed between a drive device consisting of an eccentric mechanism and a mold vibration frame,
There is a device that connects it with a link mechanism and moves the fulcrum to adjust the vibration amplitude of the mold. Although this device is inexpensive and allows reliable adjustment during casting, it requires a large space and Due to the cumulative backlash caused by the link mechanism, it has the disadvantage that it is not suitable for continuous casting equipment that requires a small shaker.

This invention aims to eliminate the above-mentioned drawbacks,
To provide a mold vibration drive device that can reliably and automatically change the vibration width of a mold from a remote location even during casting, and can stably change the vibration width from a minute vibration width to a large vibration width at any desired speed. It is something to do.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

A two-step stepped rotary shaft 3 is integrally provided at the tip of the output shaft 2 of the reducer 1 connected to the prime mover (not shown), and the working shaft part on the output shaft 2 side is an eccentric shaft part 4, and the output shaft 20 The eccentric shaft part 40 is eccentrically centered by an amount of eccentricity e1 with respect to the rotation center A as the rotation center B, while the stepped shaft part on the tip side is the neutral shaft part 5.
The center of rotation is made to coincide with the center of rotation A of the output shaft 20.

An eccentric sleeve 6 is rotatably fitted on the outer periphery of the eccentric shaft portion 4 via a bearing 40, and the rotation center C of the eccentric sleeve 6 is offset by an eccentric amount e2 from the rotation center B of the eccentric shaft portion 4. It's eccentric.

A bearing box 8 is externally fitted onto the eccentric sleeve 6 via a bearing 7,
A connecting frame 9 connected to a mold vibrating frame (not shown) is attached to the bearing box 8, and as the eccentric sleeve 6 rotates, the connecting frame 9 vibrates while maintaining a constant swing width.

At that time, due to the double eccentric mechanism of the eccentric shaft section 4 and the eccentric sleeve 6, by simply changing the phase of the output shaft rotation direction of the eccentric shaft section 4 and the eccentric sleeve 6, the bearing 7, the bearing box 8
The swing width of the connecting frame 9 and the mold vibrating frame can be changed within the combination of the maximum eccentricity (e1+e2) and the minimum eccentricity (el e2).

A mechanism for changing the phase of the eccentric sleeve 6 with respect to the eccentric shaft portion 4 and giving rotational motion to the eccentric sleeve 6 is provided on the neutral shaft portion 5 side.

That is, a coaxial sun gear 10 is fitted to the distal end side of the neutral shaft portion 5 so as to co-rotate with a key 11, and a bearing 12 is attached to the neutral shaft portion 5 between the sun gear 10 and the eccentric sleeve 6. A sun gear 13 with seven flange is rotatably fitted thereto.

An end plate 15 is attached to the tip surface of the sun gear 10 via a sleeve 14, and the end plate 15 is fixed to the end surface of the neutral shaft portion 5 to fix the sun gear 10 in the thrust direction.

The outer periphery of the sleeve 14 is supported by a frame 17 via a bearing 16 7 to hold the radial load of the stepped rotating shaft.

Planetary gears 1 are provided on the outer periphery of the sun gears 10 and 13, respectively.
The planetary gears 18 and 19 are meshed with each other.
is rotatably attached to the shaft 24 via bearings 25 and 26, and both ends of the shaft 24 are fixed to the synchronous rotation frames 27 and 28,
The synchronous rotating frames 27 and 28 are rotatably attached to the boss portions 29 and 30 of the sun gears 10 and 13, respectively, via bearings 31 and 32.

The outer peripheries of the planetary gears 18 and 19 are meshed with ring gears 33 and 34 attached to the frame 17. The gear 34 is rotatably attached to the frame 17 via a bearing 35 so as to rotate around the rotation center A of the output shaft 2.

The ring gear 34 is connected to the other end of a lever 38 whose one end is connected to an operating rod 37 of a hydraulic cylinder 36.
8, the ring gear 34 is rotated through the planetary gear 19,
The sun gear 13 is rotated.

It should be noted that as a drive source for turning the ring gear, a mechanism such as a motor and a worm or a screw may be used in place of the above-mentioned hydraulic cylinder.

The flange portion 39 of the flanged sun gear 13 is connected to the flange portion 40 of the eccentric sleeve 6 through a pin 41 and a U groove 42, so that rotation is transmitted from the sun gear 13 to the eccentric sleeve 6.

The U groove 42 allows the eccentric sleeve 6 to be eccentric with respect to the sun gear 13 by an amount of eccentricity 01 of the eccentric shaft portion 3 when the eccentric sleeve 6 and the sun gear 13 are changed in phase with respect to the neutral shaft portion 5 in the rotation direction. Since the pin 41 rotates, it is provided for the purpose of allowing the pin 41 to escape in the radial direction.

Next, the vibration effect and amplitude changing operation in the above device will be explained.

Key 11 for 20 rotations of the reducer output shaft that rotates at any speed.
is transmitted to the sun gear 10, giving rotational motion to the planetary gears 18 meshed with the sun gear 10.

Since the ring gear 33 meshing with the planetary gear 18 is fixed to the frame 17, the planetary gear 18 revolves around its axis at 1/2 of the speed of 100 rotations of the sun gear.

Therefore, the planetary gear 18, the shaft 24, the synchronous rotation frame 27,
The planetary gear 19 integrated with 28 is connected to the sun gear 13 at the same speed.
revolves around the outer circumference of

This revolving motion of the planetary gear 19 causes the ring gear 34 located at an arbitrary predetermined position to act on the planetary gear 19, inducing rotational motion at the same speed as the planetary gear 18.

Therefore, the sun gear 13 meshing with the planetary gear 19
rotates synchronously with the sun gear 10.

Therefore, the eccentric sleeve 6 rotates together with the sun gear 13.
rotates synchronously with the eccentric shaft 4 while maintaining a constant phase, and the eccentric rotation of the eccentric sleeve 6 causes the connecting frame 9 to vibrate through the bearing 7 and the bearing box 8 while maintaining a constant amplitude. The mold vibrating frame connected to the connecting frame 9 vibrates with a constant amplitude.

At that time, the vibration frequency of the mold vibration frame can be easily changed by simply changing the speed of the speed reducer output shaft 20.

Next, when changing the swing width, the ring gear 34 is turned by the hydraulic cylinder 36 via the lever 38.

The rotation given to the ring gear 34 acts only on the planetary gear 19, and the rotation of the planetary gear 19 causes the sun gear 13 to rotate, the integral eccentric sleeve 6 to rotate, and the eccentric sleeve 6 and the eccentric shaft to rotate. A change is given to the phase in the rotational direction with respect to 4.

Therefore, the combination of the amount of eccentricity between the eccentric sleeve 6 and the eccentric shaft portion 4 changes by a predetermined amount in the range from the maximum amount (e1+e2) to the minimum amount (et-e2), and the amount of eccentricity of the eccentric sleeve 6 with respect to the output shaft 2, in other words, Then, the amount of swing of the connecting frame 9 and the mold vibration frame can be changed.

After the position of the ring gear 34 is changed, the eccentric sleeve 6 and the eccentric shaft part 4 rotate synchronously with the output shaft 20 revolutions while maintaining the changed phase, and the mold vibration frame vibrates with the changed amplitude. Exercise takes place.

The phase change amount of the amplitude change mechanism is determined by the ring gear 34.
Since this is done in inverse proportion to the pitch circle diameter of the sun gear 13, a scale is provided near the ring gear 34. However, by providing an angle detector, the phases of the eccentric sleeve 6 and the eccentric shaft 40 can be adjusted externally or remotely from the machine. It can be easily confirmed from a remote location, and remote operation is possible.

In addition, the changing speed can be arbitrarily set regardless of the output shaft 20 rotation speed.8 Also, in the above embodiment, one planetary gear 18, 19 is provided, but the synchronous rotation frames 27, 260 180° on the circumference
If two of them are provided correspondingly, the reaction force received from the rotational power can be canceled out, and the radial load on the neutral shaft portion 4 can be reduced.

Further, by providing four planetary gears 18 and 19 at 90° intervals, the transmitted power can be distributed and the mechanism can be made compact.

As is clear from the above description, according to the mold vibration drive device according to the present invention, the ring gear is rotated by a drive source such as a hydraulic cylinder to change the rotational phase of the eccentric sleeve and the eccentric shaft. Just the vibration of the mold can be changed arbitrarily.

In this way, the present device has a simple structure and can be provided at low cost, and can also perform the changing operation during vibration regardless of the conditions during casting, thereby increasing the productivity of the casting operation.

Further, the change can be automatically and stably and reliably performed from a remote location, and the change speed can also be set freely.

Furthermore, although this device uses a combination of various gears, the backlash of the gears is minimal, and when the rotational motion is converted into swing motion by the eccentric mechanism, the influence on the swing direction is further reduced. Therefore, it has advantages such as very good swing width accuracy compared to the ring type.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a mold vibration driving device showing an embodiment of the present invention, and FIG. 2 is a left side view of FIG. 1. 1...Reducer, 2...Output shaft, 3...
... Rotating shaft, 4 ... Eccentric shaft section, 5 ...
...Neutral shaft section, 6...Eccentric sleeve,
9... Connection frame, 10, 13... Sun gear, 18, 19... Planet gear, 33, 34.
...Ring gear, 36...Hydraulic cylinder, 38...Lever.

Claims (1)

[Scope of Claims] 1. A rotating shaft having an eccentric shaft portion is rotatably mounted on a frame, and an eccentric sleeve is rotatably mounted on the eccentric shaft portion,
In the mold vibration drive device in which the eccentric sleeve is equipped with a connecting rod connected to the mold vibration system, a pair of sun gears are fixed to the neutral shaft portion of the rotating shaft, and the other is rotatably mounted. , a ring gear is arranged outside each of the sun gears, and the ring gear arranged outside the fixed sun gear is fixed to the frame and the ring gear arranged outside the rotatable sun gear is used as a drive source. Continuous casting characterized in that a planetary gear that is connected and rotatable and that meshes with the sun gear and one ring tooth is inserted, and a rotatable sun gear is connected to the eccentric sleeve. Drive device for mold vibration in equipment. 2. The device according to claim 1, wherein the planetary gears meshing with each of the sun gears are incorporated and arranged in a synchronous rotation frame that is rotatably fitted to the boss portion of the sun gear, and the sun gear is fixed. The planetary gear that meshes with the ring gear that meshes with the ring gear that is fixed to the frame and can rotate when it revolves around the sun gear. A drive device for mold vibration in continuous casting equipment, characterized by having a rotating configuration.