JPH05345216A - Drum type flying shear - Google Patents

Abstract

PURPOSE:To prevent the arising of flaws, causing quality lowering or breakage, etc., by elevating a drum chock pivotally mounted on one end part of an interlocking arm to which the rotating motion of first and second drive shafts is combinedly transmitted. CONSTITUTION:When a band plate is shorn, a motor 13 is driven to concurrently rotate a drum rotating shaft 11, a second drive shaft rotating shaft 24 and a first drive shaft rotating shaft. A first drive shaft 16 is rotated by the rotation force of the first drive shaft rotating shaft via a shaft 18 and a gear 17 to cause the eccentric motion of a second drive shaft 20. The second drive shaft 20 is rotated by the rotation force of the second drive shaft rotating shaft 24. Consequently the eccentric motion and rotating motion of the second drive shaft 20 is combined to become the elevating motion of a drum chock 2, via an interlocking arm 22, to elevate upper and lower drums 3 and 4. Consequently the elevation of the drum chock 2 synchronizes with the rotation period of the upper and lower drums 3 and 4, upper and lower shearing edges 5 and 6 make contact with the band plate only at the time of shearing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type flying shear.

[0002]

2. Description of the Related Art In recent years, the steel industry has been considerably developed in production technology, equipment and the like. Among them, the shear equipment used in the shearing step, which is one of the final steps, is based on various methods. The device is being studied and developed. In particular, a drum-type flying machine, in which rotatable drums with shear blades attached to the outer peripheral surface are provided above and below the path line of the strip, respectively, and these drums are rotated in synchronization with the moving speed of the strip to shear the strip. The shear is widely used at the time of producing thin strips because it can make the production line continuous and speed up.

Recently, the upper and lower drums have different diameters, and these drums are synchronously rotated at the same outer peripheral speed, so that when the upper and lower shearing blades coincide with each other, the strips are sheared. The method of increasing the number of rotations of the drum up to and increasing the acceleration time of the drum has been developed. This makes it possible to shear the strip that moves at a higher speed.

As shown in FIG. 4 which shows a schematic structure of a main part of a conventional drum type flying shear in which the upper and lower drums have different diameters, an upper drum 31 is provided above the pass line of the strip plate 101. An upper shear blade 32 is attached to the outer periphery of the upper drum 31 in parallel with the central axis,
A lower drum 33 is provided below the pass line of 1, and a lower shear blade 34 is attached to the outer periphery of the lower drum 33 in parallel with the central axis.

Here, the length from the center of the lower drum 33 to the lower shear blade 34 is 1.5 times the length from the center of the upper drum 31 to the upper shear blade 32. Therefore, the upper drum 31 and the lower drum 33 are driven by a synchronous drive device (not shown).
When these drums are synchronously rotated in the directions of the arrows in the figure so that the outer peripheral speeds of
Three rotations of 1 and two rotations of the lower drum 33 form one cycle.

The rotation cycle at this time is shown in FIG. This Figure 5
In, the vertical axis represents the distance from the strip plate 101 to the upper shear blade 32 and the lower shear blade 34, and the horizontal axis represents the rotation cycle of the upper shear blade 32 and the lower shear blade 34 in the forward rotation direction. .. Therefore, the curve 51 indicates the distance from the strip plate 101 at the rotational position of the upper shear blade 32, and the curve 52
Indicates the distance from the strip plate 101 at the rotational position of the lower shear blade 34.

Therefore, when the strip 101 is sheared, the upper shear blade 32 and the lower shear blade 34 waiting at the start position I are aligned with the shear position I where these shear blades coincide.
The synchronous driving device (not shown) is driven at a speed substantially the same as the moving speed of the strip 101 up to I, and the peripheral speeds of the upper drum 31 and the lower drum 33 are accelerated and rotated synchronously to move the strip 101 at the shear position II. Shear. Then, these shearing blades are synchronously decelerated and rotated to the stop position III immediately before the next coincidence with the outer peripheral speed of the upper drum 31 and the lower drum 33, and the rotation of these drums is stopped at the stop position III. The upper drum 31 and the lower drum 33 are reversely rotated in synchronism with each other until the next start position IV immediately before the shear position II, and a waiting period is prepared in preparation for the next shear.

[0008]

In the case of the conventional drum type flying shear shown in FIG. 5, the upper shearing blade 32 comes into contact with the strip plate 101 in addition to when the strip plate 101 is sheared. Unnecessary scratches are made on the arrow line 53 part of the above, and similarly, the lower shear blade 34 also comes into contact with the strip plate 101, and unnecessarily scratches the arrow line portion 54 of the strip plate 101. Due to this unnecessary scratch, the strip 101 moving at a high speed may be broken or its quality may be deteriorated.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the upper shearing blade and the lower shearing blade from coming into contact with a strip plate only when shearing the strip plate, thereby preventing the occurrence of scratches that cause deterioration of quality or breakage. The purpose is to provide a simple drum type flying shear.

[0010]

A drum type flying shear according to the present invention comprises a pair of drums which are opposed to each other with a pass line of a strip interposed therebetween and which have mutually different diameters and are provided with shear blades on their outer peripheral surfaces. A drum chock that is reciprocally movable in the facing direction and that rotatably supports the pair of drums; and a synchronous drive unit that is connected to the pair of drums and that synchronously rotates the pair of drums, respectively. A first drive shaft rotatably attached to the housing and rotating in synchronization with the rotation of the pair of drums; and a first drive shaft rotatably attached to the first drive shaft in an eccentric state. A second drive shaft that rotates in synchronization with the rotation of the shaft, one end of which is rotatably connected to the second drive shaft in an eccentric state and the other end of which is the drum. And interlocking arm which is pivotally connected to the Yokku,
A supporter attached to the housing so as to reciprocate in the opposite direction, and rotatably pivotally attached to the supporter and rotated in an eccentric state opposite to the interlocking arm with respect to the second drive shaft. It is characterized by having a counterweight attached freely.

[0011]

The first drive shaft is rotated in synchronism with the rotation of the pair of drums by using the synchronous drive means for synchronously rotating the pair of upper and lower drums, and is rotated in an eccentric state with respect to the first drive shaft. The second drive shaft, which is freely attached, is rotated in synchronization with the rotation of the first drive shaft, and one end of the second drive shaft is eccentrically connected to the interlocking arm that is rotatably connected to the interlocking arm. Since the rotary motion of the first drive shaft and the rotary motion of the second drive shaft are combined and transmitted, the drum chock pivotally attached to the other end of the interlocking arm is moved up and down, so that it is attached to the drum. The shear blade does not contact the strip plate except during shearing, and only contacts the strip plate during shearing.

The unbalanced couple acting on the second drive shaft is canceled by the balance weight rotatably attached to the second drive shaft in an eccentric state opposite to the interlocking arm.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 showing a front longitudinal section and FIG. 2 showing a left side surface of an embodiment of a drum type flying shear according to the present invention, a drum chock 2 is provided in the center of the left and right sides of a housing 1. Are provided so that they can be moved up and down,
These drum chocks 2 include an upper drum 3 and a lower drum 4.
And are respectively supported. An upper shear blade 5 is attached to the outer periphery of the upper drum 3 in parallel with the central axis, and a lower shear blade 6 is attached to the outer periphery of the lower drum 4 in parallel with the central axis. The length from the core to the lower shear blade 6 is 1.5 times the length from the axial center of the upper drum 3 to the upper shear blade 5. Upper synchronous gears 7 are attached to both left and right shaft ends of the upper drum 3, and lower synchronous gears 8 are attached to both left and right shaft ends of the lower drum 4, respectively. Are meshed with each other so that the upper drum 3 and the lower drum 4 are synchronously rotated at the same peripheral speed.

In the figure of the upper drum 3, at the right shaft end,
Rotary shaft 1 for drum of power distributor 10 via universal joint 9
1, the rotary shaft 11 for the drum is connected to the output shaft 14 of the motor 13 by the flange joint 12.

Above the left and right drum chocks 2, two first drive shafts 16 each having an external gear portion 15 formed on the outer periphery are provided inside and outside the housing 1. It is rotatably attached. In FIG. 1, rearward or in FIG. 2 of each of these first drive shafts 16,
On the left side, gears 17 mesh with the external gear portion 15, respectively, and the gears 17 are attached to shafts 18 penetrating both the left and right sides of the housing 1 in FIG.

A rotary shaft for a first drive shaft (not shown) of the power distributor 10 is connected to a right end portion of the shaft 18 in FIG. 1 through a joint (not shown), and the rotary shaft for the first drive shaft is connected to the rotary shaft. The power of the motor 13 is transmitted via the power distribution gear 19.

Second drive shafts 20 penetrating the inside in an eccentric state are rotatably attached to the left and right first drive shafts 16, respectively.
They are connected to each other by a flange joint 21 in the center of the housing 1. An interlocking arm 22 whose one end is rotatable in an eccentric state is attached to an inner portion of the housing 1 of the second drive shaft 20 on both the left and right sides, and the drum chock 2 is attached to the other end of the interlocking arm 22. Is rotatably attached, and the interlocking arm 22 moves the drum chocks 2 up and down.

A second drive shaft rotary shaft 24 is connected to a right end portion of the second drive shaft 20 in the drawing through a universal joint 23, and the second drive shaft rotary shaft 24 has a power source. The power of the motor 13 is transmitted via the distribution gear 19.

On the other hand, a supporter 25 is mounted on the left and right upper parts of the housing 1 so as to be able to move up and down, and a counterweight 26 is rotatably mounted on the supporter 25 by a support shaft portion 27. Then, the counterweight 26 is rotatably attached to the second drive shaft 20 by a bearing portion 28 in an eccentric state opposite to the interlocking arm 22.

Therefore, when shearing the strip 101, the motor 13 is driven to simultaneously rotate the drum rotary shaft 11, the second drive shaft rotary shaft 24, and the first drive shaft rotary shaft (not shown). .. The rotational force of the rotating shaft for the first drive shaft (not shown) causes the first drive shaft 16 to rotate via the shaft 18 and the gear 17 and causes the second drive shaft 20 to move eccentrically. Then, the rotational force of the second drive shaft rotary shaft 24 causes the second drive shaft 20 to rotate. Therefore, the second drive shaft 20
The eccentric movement and the rotational movement of (1) are combined via the interlocking arm 22 to be the lifting movement of the drum chock 2, which raises and lowers the upper drum 3 and the lower drum 4. Further, the rotational force of the drum rotation shaft 11 causes the upper drum 3 to rotate, and at the same time, causes the lower drum 4 to synchronously rotate at the same outer peripheral speed as the upper drum 3 via the upper synchronous gear 7 and the lower synchronous gear 8. Three rotations of the drum 3 and two rotations of the lower drum 4 rotate in one cycle.

As a result, the elevation of the drum chock 2 is synchronized with the rotation cycle of the upper drum 3 and the lower drum 4, so that the upper shear blade 5 and the lower shear blade 6 contact the strip plate 101 only during shearing. Has become.

On the other hand, the counterweight 26 is used for the interlocking arm 2
Since the ascending / descending motion is performed in an eccentric state in the opposite direction to 2, the coupling force acting on the second drive shaft 20 is balanced by the interlocking arm 22 to cancel the load applied to the second drive shaft 20.

The rotation cycle at this time is shown in FIG. In FIG. 3, the vertical axis represents the distance from the strip 101 to the upper shear blade 5 and the lower shear blade 6, and the horizontal axis represents the upper shear blade 5.
And the rotation cycle of the lower shear blade 6 in the forward rotation direction.

A broken line 43 represents a locus drawn by the shaft center of the first drive shaft 16 when the position of the shaft center at the time of shearing is 0, and a broken line 44 indicates shearing of the upper end portion of the interlocking arm 21. When the starting position is 0, the locus drawn by the upper end portion is represented only by the rotational movement of the second drive shaft 20, and the broken line 45 indicates the starting position when the lower end portion of the drum chock 2 is sheared. , The locus drawn by the lower end portion, and the broken line 45 is a combination of the broken line 42 and the broken line 43.

The broken line 41b indicates the strip 1 at the rotational position of the upper shearing blade 5 caused only by the rotational movement of the upper drum 3.
01, and the broken line 42b represents the distance from the strip plate 101 at the rotational position of the lower shear blade 6 due to only the rotational movement of the lower drum 4.

Therefore, the actual strip 101 of the upper shear blade 5
Is a solid line 41 in which the broken line 45 and the broken line 41b are combined, and the distance from the actual strip plate 101 of the lower shear blade 6 is a solid line 42 in which the broken line 45 and the broken line 42b are combined.
Becomes

Therefore, the rotation cycle of the upper shearing blade 5 and the lower shearing blade 6 is as follows. First, the upper shearing blade 5 and the lower shearing blade 6 waiting at the start position I are moved to the shearing position where these shearing blades coincide. Up to II, the upper drum 3 and the lower drum 4 are synchronously accelerated and rotated at the same peripheral speed so that the speed becomes substantially the same as the moving speed of the strip 101, and in synchronization with this rotation, the first drive shaft 16 and By rotating the two drive shafts 20 and moving the drum chock 2 up and down, these drums are also moved up and down. Then, the strip 101 is sheared at the shearing position II,
Stop position II, just before these shear blades meet next
By I, the peripheral speeds of these drums are synchronously decelerated,
In synchronism with this, the first drive shaft 16 and the second drive shaft 20 are decelerated and rotated to decelerate the vertical movement of the drum chock 2. As a result, these drums stopped at the stop position III are reversely rotated in synchronization with the next start position IV immediately after the shear position II, and the first drive shaft 16 and the second drive shaft 20 are reversely rotated in synchronization with this. The system is to wait for the next shear.

Therefore, the upper shearing blade 5 and the lower shearing blade 6 do not come into contact with the strip plate 101 except when the strip plate 101 is sheared.

In this embodiment, the length from the axis of the lower drum 4 to the lower shear blade 6 is 1.5 times the length from the axis of the upper drum 3 to the upper shear blade 5. However, the present invention is not limited to this, and is the same as long as the length is an appropriate ratio according to the moving speed of the strip plate 101, the driving force of the motor 13, and the like.

[0030]

According to the drum type flying shear of the present invention, the first drive shaft is rotated in synchronization with the rotation of the pair of drums by using the synchronous drive means for synchronously rotating the pair of upper and lower drums, respectively. A second drive shaft rotatably attached to the first drive shaft in an eccentric state,
The rotation motion of the first drive shaft and the second drive shaft are connected to an interlocking arm that is rotated in synchronization with the rotation of the first drive shaft and has one end rotatably connected to the second drive shaft in an eccentric state. The rotary motion of the drive shaft is combined and transmitted, and the drum chocks pivotally attached to the other end of the interlocking arm are moved up and down, so that the shear blades attached to the pair of drums are not sheared. Does not come into contact with the band plate, but does come into contact with the band plate only during shearing, so that it is possible to prevent breakage and deterioration of quality without causing unnecessary scratches.

Further, the balance weight rotatably attached to the second drive shaft in an eccentric state opposite to the interlocking arm causes an unbalanced couple acting on the second drive shaft by the interlocking arm. Because of the balance, it is possible to cancel the load applied to the second drive shaft, and at the same time, to prevent the vibration of the device caused by the high speed rotation of the drum.

[Brief description of drawings]

FIG. 1 is a front vertical sectional view of an embodiment of a drum type flying shear according to the present invention.

FIG. 2 is a left side view thereof.

FIG. 3 is a graph showing a rotation cycle of a drum type flying shear according to the present invention.

FIG. 4 is a conceptual side view of a main part of a conventional drum type flying shear.

FIG. 5 is a graph showing a rotation cycle of a conventional drum type flying shear.

[Explanation of symbols]

 1 Housing 2 Drum Chock 3 Upper Drum 4 Lower Drum 5 Upper Shear Blade 6 Lower Shear Blade 7 Upper Synchronous Gear 8 Lower Synchronous Gear 9 Universal Joint 10 Power Distributor 11 Drum Rotating Shaft 12 Flange Joint 13 Motor 14 Output Shaft 15 External Teeth Gear part 16 First drive shaft 17 Gear 18 Shaft 19 Power distribution gear 20 Second drive shaft 21 Flange joint 22 Interlocking arm 23 Universal joint 24 Second drive shaft rotary shaft 25 Supporter 26 Balance weight 27 Support shaft part 28 Bearing part 101 Strip

Claims (1)

[Claims] 1. A pair of drums, which are opposed to each other with a pass line of the strip interposed therebetween and have different diameters, and each of which has a shear blade on an outer peripheral surface thereof, and which are provided on a housing so as to be reciprocally movable in the opposing direction, A drum chock that rotatably supports the pair of drums, a synchronous drive unit that is connected to the pair of drums and that synchronously rotates the pair of drums, and a pair of rotatably attached to the housing. Drive shaft that rotates in synchronization with the rotation of the drum, and a second drive shaft that is rotatably mounted in an eccentric state with respect to the first drive shaft and that rotates in synchronization with the rotation of the first drive shaft. An interlocking arm having one end rotatably connected to the second drive shaft in an eccentric state and the other end pivotally attached to the drum chock; and the housing. A supporter reciprocally mounted in the opposite direction, and a supporter pivotally attached to the supporter and rotatably attached to the second drive shaft in an eccentric state opposite to the interlocking arm. A drum type flying shear, which is provided with a counterweight.