JPH0890329A - Scrap cutting device in hoop slitter, etc. - Google Patents

Abstract

PURPOSE: To secure a scrap cutting device in hoop slitter or the like, capable of cutting each lug part (scraps) at both sides in this slitter for hoop steel sheet into small pieces smoothly and sharply in a relatively quiet manner. CONSTITUTION: A circular shearing cutter 3 is pivotally supported on the front of a rotator 2 installed in a machine bed 1 by a floating shaft 4 concentrically with this rotator 2, while an upward recess-circular stationary shearing cuter 5 corresponding to the cutter 3 is installed in a lower part of the rotator 2, forming it into a hoop slitter or the like being composed in making its curvature a center (c) of the rotator 2. In addition, a friction wheel 6 is installed in a floating shaft 4 projected to the back of the rotator 2, and a locking member 8 with a circular friction inner surface 7 in contact with a peripheral surface of this friction wheel 6 is also installed, and thus this cutting device is composed of holding the center of this circular friction inner surface in common.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for shortly cutting long cutting ears (scrap raw material) of a strip steel slitter line.

[0002]

2. Description of the Prior Art Ears on both sides of a conventional strip steel slitter line are provided with large pits on the floor surface, and they are swirled irregularly in the pits to recover them for a long time and then disposed.

The inventor of the present application guides the ear portion to a cutting device and automatically forms a chip (Jitsuko Sho 60-2937).
No. 0) was developed, but since a circular floating shearing blade was used, the forced shearing force was weak, it took a long time to shear, and the sharpness was poor, and at the time of shearing, the supply scrap hits the shearing blade and the supply side scrap bends. Alternatively, there is a problem in that it is difficult to smoothly shear due to a phenomenon such as escaping while contacting the shearing blade, and it is difficult to put it into practical use. Further, with the conventional structure, it is difficult to cut a thin piece because it is difficult to adjust the gap between the blades.

[0004]

DISCLOSURE OF THE INVENTION The present invention can shorten the shearing time to improve the sharpness and thereby reduce the noise, and at the time of shearing, the scrap promotion is stopped to bend or curb the scrap on the supply side. The purpose is to prevent escape and to chip scrap (slitting ear) smoothly.

[0005]

In order to achieve the above-mentioned object, the present invention provides a circular shearing blade, which is concentrically concentrically with the rotating body, in front of the rotating body provided on the machine base by a floating shaft so as to support the rotating body. An upward concave arc-shaped fixed shear blade corresponding to the above-mentioned blade is provided at the bottom,
In a strip steel slitter or the like in which the curvature of the fixed shear blade is centered on the center of the rotating body, a friction wheel is provided on the floating shaft protruding on the back surface of the rotating body, and a circular friction inner surface in contact with the outer peripheral surface of the friction wheel. A scrap cutting device in a strip steel slitter or the like in which a center of the circular friction inner surface shares the center, and a fixing member having is used. An internal gear is used instead of the circular friction inner surface, and an internal gear is meshed instead of the friction wheel. Scrap cutting device for a strip steel slitter or the like according to the present invention, which is a planetary gear, etc. A strip steel slitter or the like according to the first or second aspect of the present invention, wherein the other pinch roll is pressed against the one pinch roll along a guide rod by a spring. Scrap Cutting Equipment in Scrap Supply Guide Guide Between Circular Shear Blade and Upward Concave Arc Fixed Shear Blade A strip steel slitter according to any one of the first to third inventions, wherein a pinch roll is provided inside the guide, and one of the pinch rolls is intermittently driven by a servomotor that stops when the scrap scrap is sheared. Scrap cutting device in etc. The belt according to any one of the first to third inventions, wherein the pinch roll is stopped at the time of shearing the supply scrap by the opening / closing control of the friction clutch interposed on the rotary shaft of the one pinch roll. It is composed of a scrap cutting device for steel slitters.

[0006]

In the present invention, when the rotating body is rotated in the fixed direction (arrow a in FIG. 2) about the main axis of rotation, a plurality of circular shear blades,
The idle shaft and the friction wheel revolve in a fixed direction, and at the same time, the outer surface of the friction wheel makes contact with the circular friction inner surface of the rear fixing member to rotate in the direction of arrow b in FIG. In that state, the scrap is inserted from the supply guide guide between the plurality of circular shear blades.

In this way, the supply scrap is narrowed between the circular shearing blade revolving from the direction of the arrow a and the fixed shearing blade, and the scrap is sheared by the rotation of the circular shearing blade in the direction of the arrow b, and the shearing is performed. Until the end, the supply of scrap is stopped until the circular shear blade has passed.

An internal gear is used instead of the circular friction inner surface,
In that case, a planetary gear that meshes with the internal gear can be used instead of the friction wheel.

The scrap supplied between the circular shearing blades slips between the scraps and the pinch rolls pressed by the force of the spring to stop the feeding and perform intermittent rotation.

Further, one (lower) pinch roll is provided with an intermittent drive servomotor for stopping the supply from scrap shear to passage of the circular shear blade, or a friction clutch intervening on the rotary shaft of one pinch roll. By controlling the opening and closing, one of the pinch rolls can be stopped and intermittently rotated during shearing.

[0011]

EXAMPLE A machine casing 1'is provided on a machine base 1 and a horizontal main rotating shaft 15 is supported by bearings 15 'and 15' in the machine casing 1 '.
The V-belt 18 connects the adjusting wheel 16 provided at the rear end of the main rotary shaft 15 and the output adjusting wheel of the reduction main electric motor 17a provided on the machine base 1.

The main rotary shaft 15 extends in front of the machine case 1 ',
A circular rotary body 2 is provided at the tip. A plurality of concentric circles (2 in FIG. 2) are provided on the front surface (front surface) of the circular rotary body 2.
One, three or more pieces of circular shearing blades 3, 3 are fixed to the idle shafts 4, 4 by a key 17 and are rotatably supported by the rotary body 2 (i.e., rotatably supported).

An upward concave arc-shaped fixed shear blade 5 corresponding to the blades 3 and 3 is provided on the machine base 1 so as to be in contact with the blades 3 and 3, and the curvature of the fixed shear blade 5 is provided below the rotary body 2. Is common to the center c of the rotating body 2.

A friction wheel 6 (friction wheel) is fixed to the rear end of the floating shaft 4 projecting from the rear surface of the rotating body 2 in the rotational direction by a key 17 '. The wheel 6 is made of a non-slip material such as a special rubber having a wear resistance, and a fixing member 8 having a circular friction inner surface 7 in contact with the outer peripheral surface of the wheel 6 is provided between the rotating body 2 and the machine casing 1 '. It is fixedly provided on the machine base 1. Steel for the fixing material 8,
Hardened rubber / iron composite materials are used.

A circular friction outer surface (not shown) of the fixing member 8
It is possible to bring the same action by contacting the outer peripheral surface of the friction wheel 6 by design. In that case, the rotation direction of the circular shearing blade 3 is opposite to the arrow a.

It is also possible to use an internal gear instead of the circular friction inner surface 7 and use a planetary gear that meshes with the internal gear instead of the friction wheel 6.

Ear of the slitter supplied (scrap 1
The tip of 1) is stopped by hitting the front surface of the circular shearing blade 3 when sheared, and momentarily bulges upward due to the action of the supply pressure, but the chock 18a that pivotally supports the other (upper) pinch roll 10 '. Can be slid on the two fixed guide rods 13 and 13 in the ascending / descending direction, and the (upper) pinch roll 10 'can be adjusted by adjusting the coil springs 14 and 14 supported between the guide rods 13 and 13 and the chock 18a. Due to the slip between the supply scrap 11 and the supply scrap 11, it is instantaneously stopped on the front surface of the circular shearing blade 3 in a relatively straight line without bending.

Further, because of the structure, it is possible to easily adjust the gap and lap of the blade, so that chipping of the relatively thin scrap 11 is possible. In the case of a thin material, one (lower) pinch roll 10 is intermittently stopped by the servomotor 19. It is possible to deal with the case where the tip is abutted against the circular shearing blade 3 and sheared, and the stop time of the servomotor 19 is set to the rotating body 2.
It is possible to perform arithmetic control based on the rotation speed and the distance between the circular shearing blades 3 and 3.

Further, instead of the servo motor 19, a friction clutch 20 is interposed on the rotary shaft 12 of one (lower) pinch roll 10, and the open / close control of the friction clutch 20 intermittently stops the supply scrap 11 and the circular shear blade 3 and the supply scrap 11. The scrap 11 can be supplied linearly while avoiding the bending and escape of the supply scrap 11 due to the collision with the scrap. The stop timing is calculated from the interval between the circular shearing blades 3 and 3 and the rotation speed of the rotating body 2, and the friction clutch 20 is stopped linearly in front of the circular shearing blade 3 by a relay or a limit switch. It can be supplied intermittently. Of course, one side (downward)
The inertial rotation of the pinch roll 10 is blocked by the pressure exerted by the springs 14, 14 and the chock 18a of the other (upper) pinch roll 10 '.

Reference numeral 21 in the drawing denotes a bearing of the floating shaft 4,
Reference numeral 22 is a lock nut screwed into the guide rods 13, 13 and 23 is a shearing chip storage box.

[0021]

As described above, according to the present invention, a friction wheel is provided on a floating shaft projecting from the rear surface of a rotary body as described above, and a fixing member having a circular friction inner surface in contact with the outer peripheral surface of the friction wheel is provided, or the floating shaft is provided on the floating shaft. Since the planetary gear and the internal gear that meshes with the planetary gear are provided, the circular shearing blade on the front side does not move, and is driven to quickly shear the supplied scrap for good sharpness, thereby suppressing noise. Further, upper and lower pinch rolls are provided in the scrap supply guide, and the other pinch roll is pressed against one of the pinch rolls along the guide rod by a ridge so that when the scrap scrap is sheared, it is momentarily in front of the circular shearing blade. There is an effect that the supply scrap that bulges and bends due to collision is suppressed linearly, and the supply scrap can be smoothly sheared into small pieces. Further, in the case of large-sized scrap, the servo motor or friction clutch can be controlled to automatically stop from the start of shearing to the passage of a circular shearing blade, and the scraping operation of scrap can be carried out smoothly and quietly.

[Brief description of drawings]

FIG. 1 is a diagram of a scrap cutting device in a strip steel slitter or the like of the present invention.

FIG. 2 is a front view taken along the line AA of FIG.

FIG. 3 is a vertical cross-sectional rear view taken along the line BB of FIG.

[Explanation of Codes] 1 Machine 2 Rotating body 3 Circular shearing blade 4 Floating shaft 5 Upward concave arc-shaped fixed shearing blade 6 Friction wheel 7 Circular friction inner surface 8 Fixing material c Center 9 Scrap supply guide 10 One pinch roll 10 ' The other pinch roll 11 Supply scrap 12 Rotating shaft 13 Guide rod 14 Spring

Claims (5)

[Claims] 1. A circular shearing blade is concentrically formed on a front surface of a rotating body provided on a machine base by a floating shaft, and an upward concave arc-shaped fixed shearing blade corresponding to the blade is provided below the rotating body. In a strip steel slitter or the like in which the curvature of the fixed shear blade is centered on the center of the rotating body, a friction wheel is provided on the floating shaft protruding on the back surface of the rotating body and is in contact with the outer peripheral surface of the friction wheel. A scrap cutting device for a strip steel slitter or the like, in which a fixing material having a circular friction inner surface is provided, and the center of the circular friction inner surface shares the center. 2. An internal gear is used instead of the circular friction inner surface,
The scrap cutting device for a strip steel slitter or the like according to claim 1, which is a planetary gear that meshes with an internal gear instead of the friction wheel. 3. The pinch roll on the other side is pressed against the one pinch roll on the one side by a spring along a guide rod.
A scrap cutting device for a strip steel slitter, etc. according to (1) or (2). 4. A scrap feed guide guide facing between the circular shearing blade and the upward concave arc-shaped fixed shear blade is provided with a pinch roll in contact with the inside of the guide, and one pinch roll is stopped at the time of shearing the feed scrap. The scrap cutting device for a strip steel slitter or the like according to any one of claims (1) to (3), which is intermittently driven by a servo motor. 5. The pinch roll is stopped when shearing the supply scrap by opening / closing control of a friction clutch interposed on the rotary shaft of the one pinch roll.
A scrap cutting device for a strip steel slitter or the like described in any one of to (3).