JP2889902B2 - Rotary shear device for metal strip welding machine - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a shear device incorporated in a metal strip butt welding machine, and more particularly, to a butt welding machine having an inlet side clamping apparatus and an outlet side clamping apparatus. After grasping the strip and the following strip, and cutting the strip end protruding from the clamp tip by the rotary shear device which moves forward in the strip width direction, when returning the rotary shear device to the original position, the rotary shear device is used. A rotary shear device in which the rotary shear device at the ascending position is lowered from the shear line so that it can pass through the lower side of the strip without hindrance in order to avoid interference between the strip end and the strip end from the tip of the clamp. When changing the margin according to conditions such as the thickness of the strip, The center position of the related rotary shear device can be adjusted automatically shifted to the flow direction of the strip line.

(Related Art) Conventionally, when a rotary shear device cuts an end portion of a strip and then returns the rotary shear device to an original position, a rotary shear device is used to prevent interference with the strip during the return movement. It is necessary to release the shear device from the shear line at the cutting end position. As a conventional device in this case, for example, Japanese Patent Publication No. 60-2663
An apparatus described in Japanese Patent Publication No. 6 "tilting device of upper and lower round blade type shearing set for metal strip welding machine" is known.

In this type of conventional apparatus, a moving frame equipped with a rotary shear device is moved by a driving device between an input side clamping device and an output side clamping device along a guide mechanism from a direction crossing a strip line, and the moving shear device is moved. The shear stopper is rotated by 0 ° to 90 ° so that the shear stopper is raised and tilted by contacting the movable stopper attached to the fixed stopper near the both end positions in the direction crossing the strip line. . on the other hand,
Since the allowance of the end of the strip from the tip of the clamp has a significant effect on the welding result, it is necessary to change it in accordance with changes in the material or thickness of the strip. In this case, the center of the shear is generally moved and adjusted in the front-rear direction of the strip line prior to welding.

As a conventional shear device of this type, for example,
Japanese Patent Application Laid-Open No. 52-46743, entitled "Shear Center Setting Cutting Apparatus" is known.

That is, this type of conventional apparatus is provided with a frame that can be raised and lowered above a box-shaped frame and a fixed frame below, and can be moved in the line flow direction by a guide groove of the frame below and above each frame. A tool holder having an upper blade and a lower blade is provided, and is moved together by a motor and a speed reducer to adjust a take-out margin.

(Problems to be Solved by the Invention) However, in the former case, the position at which the rotary shear device is tilted or raised is limited to the end position in the shear cutting movement direction or the end position in the return movement direction. When the device is overturned, the shear surface faces downward, so that maintenance such as replacement of the shear blade, gap adjustment, and lap adjustment becomes difficult. Therefore, in this case, the shear device is returned to the return position, and the maintenance is performed after raising the shear device to the original posture again. As described above, when the maintenance is limited to a predetermined work place, there is a limitation in performing the maintenance quickly and accurately at any position in order to increase the line tact time.

Further, in the conventional apparatus, since the shear apparatus is simply rotated by 90 °, fine position adjustment of the rotary shear in the height direction cannot be performed.

On the other hand, in the latter case, the so-called upper blade and lower blade are divided into a guillotine shear by one motor, and the upper blade and lower blade are simultaneously shifted in the line flow direction by a shaft, a speed reducer, and a screw. In addition, the entire apparatus is large, and the amount of movement of the upper blade and the lower blade often changes due to backlash of the gears of the speed reducer, play of the screw portion, and the like. In addition, there is a problem that the cutting accuracy is remarkably reduced due to wear of the guide portion.

Accordingly, it is an object of the present invention to solve the above-mentioned problems and to contribute to improving the operation rate of a production line by a fully automatic system for a metal strip welding line.

(Means for Solving the Problems) Specific technical measures taken by the present invention are as follows:
First, an inlet-side clamp device and an outlet-side clamp device arranged on the inlet side and the outlet side of a welding line for horizontally passing a metal strip, between the inlet-side clamp device and the outlet-side clamp device, A moving truck that moves forward and backward in a direction intersecting with the longitudinal direction of the metal strip, a parallel link provided on the moving truck so as to be swingable in a vertical plane perpendicular to the moving direction of the moving truck; Frame, a pair of rotary shears composed of an upper blade and a lower blade supported by the shear frame, a driving device for swinging the parallel link, and restricting the movement of the shear frame ascending by the driving device. And a stopper device for changing the shear raising position.

Second, the shear frame is provided with a shear shift device for shifting the rotary shear in the longitudinal direction of the metal strip.

(Operation) In the present invention, a margin is set at the butt end portion under conditions such as a plate thickness prior to welding. In order to set this allowance,
As can be seen from FIGS. 3 to 5, the shear frame 3 is moved by the driving device 18 in the line flow direction using the guide shafts 4a and 4b as guides. In this case, the entrance-side clamp device 28 moves by twice the moving amount of the shear frame 3. Then, the leading strip 29 and the trailing strip 30 are connected to the entrance clamp device 28 and the exit clamp device 27 of the butt welding machine.
Is supplied, the strip stops at the end protruding from each clamp tip, where it is clamped securely. The butted ends held by the clamps are cut by the rotary shear device 2 ascended by the movable trolley 1 entering between the clamps and moving in the plate width direction. As a result, the protrusion amounts of the entrance-side clamp device 28 and the exit-side clamp device 27 from the respective clamp tips, that is, the protrusion allowance, have the same dimensions on the left and right.

After the rotary shear device 2 completely cuts the strip in this way, the shear frame 3 is erected by tilting the parallel links 5 and 6 forward by the driving device 7 at the position where the cutting is completed as shown in FIG. In this state, it is possible to descend to a position separated downward from the shear line (L). In this way, the shear device 2 is moved in the return direction by passing the lower side of the strip, and in order to prepare for the next cutting, the parallel link 5, 6 that has now fallen by the driving device 7 is again swung to the original position at the return position. Position of the shear line (L)
To the height of.

As described above, in the present invention, since the rotary shear device is moved up and down by the swing operation of the parallel links 5 and 6, the rotary shear device can be moved up and down without changing the posture at any position. It can be easily performed even at the position. In addition, since the position of the shear frame can be continuously adjusted in the height direction by restricting the position of the shear frame by the stopper device, it is easy to correct even if the position of the shear changes due to wear of the shear blade. It is possible to always maintain a constant cutting accuracy.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of the shearing device according to the present invention, showing a cutting position (up position), and FIG. 2 shows a down position. FIG. 3 is a front view. FIG. 4 is a view on arrow A in FIG. FIG. 5 is a view on arrow B in FIG. FIG. 6 is a view on arrow C of FIG.
FIG. 7 shows a state in which the height of the shear changes by adjusting the position of the stopper.

Reference numeral 1 denotes a movable trolley, in which a guide mechanism and a drive unit (not shown) intersect the strip line of the butt welding machine arranged on the strip line, between the input side clamp apparatus and the output side clamp apparatus, that is, in the direction of metal. It moves in a direction perpendicular to the longitudinal direction of the strip (perpendicular to the plane of FIG. 3). Reference numeral 2 denotes a rotary shear device mounted on the movable trolley 1, and a pair of round blade-shaped upper blades 2 a and lower blades 2 b are mounted on a shear frame 3. The shear frame 3 is supported by guide shafts 4a and 4b of a shear shift device 4 to be described later so as to be able to shift in the left-right direction in FIG. 3, and a parallel link 5, 6 are connected by pins P ₁ to P _4. Reference numeral 7 denotes a drive unit for vertically moving the shear frame 3. A trunnion-type cylinder is pivotally supported on the movable cart side, and its piston rod 8 is connected to the frame of the shear shift device 4. Accordingly, the entire shear device can be lowered from the shear line (L) by rotating the parallel links 5 and 6 about the pins P1 and P2 by the driving force of the cylinder 7. Reference numeral 10 denotes a stopper device which can adjust the position of the shear in the vertical direction, and is provided between the movable carriage 1 and the rotary shear device 2 at a position where the shear force of the shear is received. That is, in the stopper device, a stopper plate 11 is mounted on a box-shaped frame 16, and a stopper groove U having a trapezoidal cross section is formed in a vertical direction of the stopper plate. A stopper receiving piece 12 corresponding to this stopper plate is mounted on an adjusting plate 14 supported movably in the left-right direction with respect to a bracket 13 fixed to the moving carriage side. The tip of the stopper receiving piece 12 having a trapezoidal cross-section is fitted in the stopper groove U at the ascending position of the shear to move the shearing device in the vertical direction.

The shaft of the bevel gear box 17 housed in the box-shaped frame 16 is connected to the shaft of a drive device 18 mounted on the outside of the frame 16 by a coupling 19, and the shear shift device 4 is connected to a bracket 20 on the shear frame side. A nut 21 is mounted, and a screw shaft 22 connected to a shaft on the other side of the bevel gear box 17 is inserted into the nut 21.

The operation of the rotary shear device 2 having the above configuration will be described.
When 30 is supplied to the entrance-side clamping device 28 and the exit-side clamping device 27, and stops with the ends of both strips protruding from the clamp tips, the butting ends are clamped by the clamping devices 27, 28. After clamping the butting ends, the carriage 1 moves to the left in FIG. 1 to cut off the ends of the strips 29,30. S is a sheared plate.

In the cutting process, the parallel link 5,
6 is rotated to raise the rotary shear device.
The ascending position of the rotary shear device 2 is restricted by the set position of the stopper receiving piece 12. Stopper stopper 12
Since the adjustment bracket 14 having the shape can be moved in the left-right direction by the adjustment screw 15, by adjusting this position, the height of the cutting position of the shear can be changed as shown in FIG. In other words, when it is desired to change the position of the shear in the vertical direction due to a change in plate thickness or wear of the shear, if the stopper receiving piece 12 is moved rightward by the adjusting screw 15, the position of the shear rises by the dimension b, and If it moves in the direction, the position of the shear will be lowered by a dimension.

After the plate is cut by the rotary shear device in which the shear height is thus positioned, the two strips are welded, and then the welding portion is trimmed.

After the trimming is completed, the driving device 7 causes the parallel links 5 and 6 to fall forward, thereby lowering the shear frame 3 from the upright state to below the shear line (L). Thus, the mobile trolley 1 moves the shear device 2 under the strip and moves in the return direction. In order to prepare for the next cutting at the return position, the driving device 7 returns the parallel links 5 and 6 again to raise the shear position to the shear line (L).

Next, the shift operation of the shear will be described. When the shaft of the driving device 18 rotates, the screw 22 rotates through the bevel gear box 17 connected by the coupling 19, and the nut 21 moves up and down in FIG. Go to Since the nut 21 is fixed to the metal fitting 20 of the shear frame 3, when the nut 21 moves, the shear frame 3 also moves using the guide shafts 4a and 4b as a guide.

When the shear frame 3 is moved and adjusted in the left-right direction according to the take-out allowance dimension, one entrance-side clamp device 28 is moved relative to the other stationary exit-side clamp device 27 by a guide mechanism and a driving device (not shown). Shear frame 3
The plate 29, 30 is clamped and held in the left-right direction by a movement amount corresponding to twice the amount of movement of the plates 29, 30. In this state, plate 29,
When 30 is cut by the shear, the allowance from each clamp tip becomes the same size.

(Effects of the Invention) As described above, in the present invention, the shear cutting position of the rotary shear is changed via the shear shift device, and the direction of the shear, that is, the direction of the shear, Since the shear posture does not change constantly at the ascending or descending position, maintenance such as replacement of the shear blade, adjustment of the clearance and lap allowance of the upper and lower blades can be easily performed at any position of ascending and descending, and stable cutting accuracy Can be maintained. Also, since the shear shift device 4 is compactly housed in the box-shaped frame and moves up and down together with the shear frame 3, the shear shift operation can be performed at any of the ascending and descending positions. Can be done. Also, the shear height can be easily adjusted by adjusting the position of the stopper receiving piece 12 of the stopper device. Further, since the groove U of the stopper plate 11 and the stopper receiving piece 12 are trapezoidal and fit into each other at the ascending position, it is possible to restrict the shearing of the shear at the ascending position, that is, the cutting position. There is no need to have a robust design.

In addition, since the mounting positions of the driving devices 7 and 18 are in the same direction, maintenance can be easily performed, and various excellent effects contributing to shortening of line tact by a fully automatic system of a metal strip welding line can be enjoyed. .

[Brief description of the drawings]

FIG. 1 is a side view of the rotary shear device according to the present invention, showing a cutting position (up position), and FIG. 2 shows a down position. FIG. 3 is a front view. FIG. 4 is a view on arrow A in FIG. FIG. 5 is a view on arrow B in FIG. FIG. 6 is a view on arrow C of FIG.
FIG. 7 is a diagram showing a state in which the height of the shear changes by adjusting the position of the stopper. DESCRIPTION OF SYMBOLS 1 ... Movable trolley, 2 ... Rotary shear device 3 ... Shear frame, 4 ... Shear shift device 5, 6 ... Parallel link, 7 ... Drive device 10 ... Stopper device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 63-113510 (JP, U) JP-A 3-44510 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23D 19/04 B26D 1/24

Claims (2)

(57) [Claims] 1. An inlet-side clamp device and an outlet-side clamp device which are arranged on an inlet side and an outlet side of a welding line for horizontally passing a metal strip, and between the inlet-side clamp device and the outlet-side clamp device. A moving vehicle that moves forward and backward in a direction intersecting the longitudinal direction of the metal strip, a parallel link provided on the moving vehicle so as to be swingable in a vertical plane perpendicular to the moving direction of the moving vehicle, and the parallel link; Frame, a pair of rotary shears composed of an upper blade and a lower blade supported by the shear frame, a driving device for swinging the parallel link, and restricting the movement of the shear frame ascending by the driving device. A rotary shear device for a metal strip welding machine, comprising: a stopper device for changing a shear raising position. 2. A rotary shear device for a metal strip welding machine according to claim 1, wherein said shear frame is provided with a shear shift device for shifting a rotary shear in a longitudinal direction of the metal strip.