JP2003074287A - Rotary-vibratory cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device suitably used for cutting a rock and removing pig iron waste (slag) stuck to the internal wall of a ladle, a tundish, or the like in a steel mill. SOLUTION: This rotary-vibratory cutter is provided with a support frame for supporting rotation bits formed by mounting a plurality of cutting edge bodies to the outer peripheral part of a rotating drum; an arm for movably and tiltably supporting the support frame; a rotationally driving device for rotationally driving the rotation bits; and a vibrating device for applying vibration to the rotation bits. The support frame is compose of a base frame mounted to the arm, and a vibrating frame journalled to the base frame. The vibrating device is provided to vibrate the vibrating frame to the base frame between the base frame and the vibrating frame, and the rotationally driving device is mounted to the base frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tool suitable for cutting rocks in civil engineering works, tundish for putting hot metal in ironworks, removing hot metal scraps (slag) adhering to pots, etc. The present invention relates to a vibration cutting device.

[0002]

[Prior Art] Rock cutting, tundish in steel mills,
As a cutting device suitable for removing molten pig iron (slag) adhering to the inner wall of pots, etc., a device was developed in which a rotating drum with multiple blades attached to the outer peripheral part was supported by an arm such as a hydraulic excavator. (See JP 2001-98311 A).

This device is a device for cutting by pressing a work piece by vibrating while rotating a rotary drum having a large number of blades mounted thereon, and it is possible to efficiently perform the work manually performed in the past. It is possible.

[0004]

However, in the conventional rotary / vibration cutting device, a support frame having a rotary drum and a rotary drive device for rotationally driving the rotary drum is attached to an arm, and the support frame is provided. Since the whole structure is vibrated by the vibrating device, the vibration of the vibrating device is transmitted not only to the rotary drum but also to the rotary driving device, so that there is a problem that the rotary driving device is easily broken. Also,
In the conventional device, since the entire supporting frame that supports the rotating drum is vibrated, it is difficult to match the vibration direction of the rotating drum with the pressing direction during cutting, and the pressing force and vibration are effectively applied to the work piece. There was a problem that it was difficult to do. In addition, the conventional cutting device has a problem that dust particles (cutting dust) are scattered. Therefore, in the present invention, the vibration of the vibrating device is exclusively transmitted to the rotating drum,
It is an object to prevent the rotary drive device from being adversely affected and to be able to suck and remove the dust generated by cutting.

[0005]

In order to solve the above problems, the present invention provides a rotary / vibration cutting device having the following configuration. That is, the rotary / vibration cutting device according to the present invention is
A support frame for supporting a rotary bit having a plurality of blades attached to the outer peripheral portion of the rotary drum, an arm for movably and tiltably supporting the support frame, and a rotary drive device for rotationally driving the rotary bit, A vibrating device for vibrating the rotary bit, wherein the support frame is composed of a base frame attached to the arm and a vibrating frame pivotally supported by the base frame. The vibrating frame is provided between the base frame and the vibrating frame so as to vibrate with respect to the base frame, and the rotation driving device is attached to the base frame.

In this rotary / vibration cutting device, a support frame for supporting the rotary drum is divided into a base frame attached to the arm and a vibration frame pivotally supported by the base frame. The vibrating device is provided to vibrate the vibrating frame with respect to the base frame between the base frame and the vibrating frame, and since the rotation drive device is attached to the base frame,
The vibration of the vibrating device is transmitted exclusively to the rotary drum and not to the rotary drive. Therefore, troubles due to the vibration of the rotation drive device do not occur.

According to the second aspect of the invention, since the powdered powder generated by the rotation of the rotary drum is sucked from the suction port and sent to the suction device through the suction hose, it is necessary to appropriately treat it. You can In this case, it is desirable that the suction port can be directed in a desired direction by supporting the suction hose on an arm via an actuator that moves the suction hose.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below. 1 to 5 show the rotation of the present invention.
1 illustrates an embodiment of a vibration cutting device. A rotary / vibration cutting device (hereinafter referred to as “cutting device”) 1 includes a rotary bit 2, support frames 3 and 4 for supporting the rotary bit, and a rotary bit 2. A drive device 5 for rotating and driving the device and a vibration device 7.

Of the support frames 3 and 4, the support frame 3 on the front end side is a vibrating frame that vibrates during cutting, and the rotary bit 2 is rotatably supported at the front end portion thereof. Further, a drive device 5 for rotationally driving the rotary bit 2 is attached to the support frame 4 on the base side, and is connected to an arm described later by a bracket 4a integrally provided on the rear part thereof. The support frame (vibration frame) 3 on the distal end side has a shaft 6 on the support frame 4 on the base side.
And the vibration device 7 are connected. In the illustrated example, lower portions of both support frames 3 and 4 are rotatably connected by a shaft 6, and upper portions thereof are connected by a vibration device 7.

As shown in FIGS. 2 and 3, the rotary bit 2 has a plurality of blades 13, ... Attached to the outer peripheral portion of a rotary drum (rotor) 12 attached to a shaft 11 with a parallel key 11a. The blade body 13 is formed by fixing a cemented carbide tip 13b to the tip of a shank 13a made of steel. The shank 13a is fitted into a mounting hole of a holder 14 fixed to the rotary drum 12 and fixed by welding or the like. It is fixed by means. The mounting angle of the blade body 13 is such that the sharp blade tip is the rotating body 12.
Of the blade and the angle at which the cutting edge is slightly inclined outward.

In the illustrated apparatus, a pair of left and right rotary bits 2 and 2 are attached to a common shaft 11, and the shaft 1
1 is rotatably supported in a state of being inserted into a pair of plate bodies 15a, 15a forming the support frame 3. A sprocket wheel 16 attached to the shaft 11 is provided in the space between the plates 15a, 15a.

On the other hand, a hydraulic motor is attached to the support frame 4 as a rotary drive unit 5, and a chain 18 is hung between the sprocket wheel 17 attached to the output shaft of the hydraulic motor and the sprocket wheel 16 of the shaft 11. There is. Therefore, when the hydraulic motor of the rotary drive device 5 is activated, the rotary bit 2 rotates. 19 in the figure is a chain 18
It is a tension wheel that makes you nervous.

The bracket 4a of the support frame 4 on the base side is provided with bearing holes 26 and 27, and the upper bearing hole 2 is formed.
6, a rod of a hydraulic cylinder 35 for tilting the support frame up and down is connected by a shaft 28, and an arm 30 of a hydraulic excavator 40 is connected by a shaft 32 to a lower bearing hole 27. The arm 30 is connected to a boom 34 that is rotatably supported in the horizontal plane of the body of the hydraulic excavator, and is connected to the cylinder 3
It is rotated up and down by 6. The arm 30 and the rod 35a of the hydraulic cylinder are connected to each other by a link 37.

The vibrating device 7 includes a hydraulic cylinder 7a,
This is a known hydraulic vibration actuator that generates vibration by a hydraulic pulse, and is connected to a hydraulic pulse generator 8 provided separately by a hydraulic hose H. The hydraulic pulse generator 8
Is a known device in which a hydraulic motor and a rotary valve are combined, and a desired pulse can be obtained by rotating a rotary valve. As the hydraulic pulse generator 8 and the hydraulic vibration actuator 7a, for example, TEIJIN
Hydraulic pulse generator "VIBRO" made by SEIKI
GENERATOR "and hydraulic vibration actuator" VI
BRO MATE "can be used.

The cutting device is provided with a suction device 50 for removing the powder dust generated by cutting. As shown in FIG. 5, the suction device 50 includes a vacuum pump 51, a bag filter 52, and a cyclone 53 connected by a pipe P. Below the cyclone 53, a belt conveyor 55 for discharging is provided. Below the filter 52, a screw conveyor 56 for transferring the fallen objects to the belt conveyor 55 is provided.

Hose 6 connected to the cyclone 53
0 is supported by a ring 61 provided on the boom 34 and a support rod 62 provided on the arm 30. The base of the support rod 62 is pivotally supported by the tip of the arm 30, and the rod of the hydraulic cylinder 65 attached to the arm is connected to the middle of the base. Since the ring 61 is larger than the outer diameter of the hose 60, the hose can freely slide in the ring. On the other hand, since the support rod 62 firmly holds the vicinity of the suction port 60a of the hose, when the support rod 62 is rotated by expanding and contracting the cylinder 65, the tip end side of the hose swings up and down to suck. The direction and position of the mouth 60a change. Therefore, by operating the cylinder 65, the suction port 60a
Can be set to a desired position and orientation.

When using the cutting device 1, the hydraulic excavator S is moved to a desired working position, and the turntable, boom, arm, etc. of the hydraulic excavator are operated to position the rotary bit 2 at the working location. The bit is pressed against the work site while being rotated and vibrated. Rocks etc. are scraped off by this rotating bit. In this way, if you use it by attaching it to the arm of a hydraulic excavator, you can easily move it to any cutting location, and also turntable,
It is convenient because the cutting position can be freely selected by operating the boom and arm. Needless to say, another machine frame may be provided instead of the hydraulic excavator in the illustrated example, and the machine frame may be supported by the machine frame to perform the work.

This cutting apparatus 1 is capable of applying a proper vibration to the bit while rotating the rotary bit 2 having a large number of blades on its outer periphery while pressing it against the object to be cut while rotating. Therefore, a chipping action can be expected and the cutting efficiency is extremely high. Under normal cutting conditions,
The rotary bit is pressed against the surface to be cut represented by F in FIG. 1 for cutting. In this cutting device, the vibration direction of the vibration device 7 is the direction in which the support frame 3 is rotated up and down about the shaft 6, The vibrating force acts in the direction in which the blade of the rotary bit is pressed against the surface to be cut, so that the cutting can be performed more efficiently. Further, the part that actually vibrates is only the part that supports the rotary bit, and the part that supports the rotary drive device 5 does not vibrate, so trouble does not easily occur in the rotary drive device.

While cutting, a large amount of powder (cutting dust) is generated. Since the cutting device is provided with a suction device 50 for discharging powder, the generated powder is sucked by the suction device 50.
Removed by. That is, the powdered powder sucked from the suction port 60a provided at the position facing the rotary bit 2 is sent to the cyclone 53 through the hose 60 and separated into large particles. The separated large-sized waste is sent to a predetermined place by the belt conveyor 55 and stored. On the other hand, the fine particles separated by the cyclone are sent to the bag filter 52 through the pipe and are collected there. The collected dust falls on the screw conveyor 56 and is transferred to the belt conveyor 55 by the screw conveyor,
Is discharged. In this way, since the dust generated by cutting is sucked and removed from the cutting place, deterioration of the working environment is prevented.

[0020]

As is apparent from the above description, the rotary / vibration cutting device according to the present invention presses against a workpiece while applying rotation and vibration to a rotary bit having a plurality of blades on its outer peripheral portion. As a result, it becomes possible to efficiently cut a work piece that is difficult to cut with a conventional device when cutting rock or the like. Particularly, since the vibrating device mainly vibrates only the rotary bit and does not vibrate the rotary driving device, trouble is unlikely to occur in the rotary driving device. Also,
By providing a suction device having a suction port at a position facing the rotary bit, it is possible to remove the powder dust generated during cutting, so that a good working environment can be maintained.
In this case, if the position and direction of the suction port can be adjusted by the history operation as in the illustrated example, it is convenient because the optimum suction state can be maintained.

[Brief description of drawings]

FIG. 1 is a side view illustrating an embodiment of the present invention.

FIG. 2 is a plan view showing a developed state with a part thereof omitted.

FIG. 3 is a sectional view taken along line XX in FIG.

FIG. 4 is an overall view attached to a hydraulic excavator.

FIG. 5 is an explanatory diagram of a configuration of a suction device.

[Explanation of symbols]

1 Rotation / vibration cutting device 2 rotation bits 3 Support frame (vibration frame) 4 support frames 5 rotary drive 6 axes 7 Vibration device 11 axes 13 blades 30 arms 50 suction device 60a suction port S hydraulic excavator

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Hiromi Kawakami, inventor             36 Yamato, Tojo-cho, Hiba-gun, Hiroshima Prefecture Yamato             Lock Machine Co., Ltd. (72) Inventor Noboru Teraoku             36 Yamato, Tojo-cho, Hiba-gun, Hiroshima Prefecture Yamato             Lock Machine Co., Ltd. (72) Inventor Hirotaka Kawamoto             36 Yamato, Tojo-cho, Hiba-gun, Hiroshima Prefecture Yamato             Lock Machine Co., Ltd. (72) Inventor Kuroe             22 Oishizaki, Oyamazaki-cho, Otokuni-gun, Kyoto Prefecture               Hitachi Construction Machinery Co., Ltd. Kansai branch office (72) Inventor Hiroki Itaya             271 Yamachi, Kurashiki City, Okayama Prefecture Tanurue Co., Ltd.             Inside engineering F-term (reference) 2D012 DA02                 2D065 DA07 DB07 DB13                 2E176 DD11 DD21 DD61

Claims (3)

[Claims] 1. A support frame for supporting a rotary bit having a plurality of blades attached to an outer peripheral portion of a rotary drum, an arm for movably and tiltably supporting the support frame, and rotationally driving the rotary bit. A rotation driving device and a vibrating device for vibrating the rotary bit are provided, and the support frame is composed of a base frame attached to an arm and a vibration frame pivotally supported by the base frame. The vibrating device is provided between the base frame and the vibrating frame so as to vibrate the vibrating frame with respect to the base frame, and the rotation driving device is attached to the base frame. Rotation / vibration cutting device. 2. The rotary / vibration cutting device according to claim 1, wherein a suction port of a suction hose connected to the suction device is provided so as to be supported by the arm so as to face the rotary bit. 3. The rotary / vibration cutting device according to claim 2, wherein the suction hose is supported by the arm via an actuator, and the suction port can be supported in any direction by the operation of the actuator.