JPS59320B2 - Strip Clamp Hohou Oyobi Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a butt welding device that simultaneously cuts the rear end of the leading strip and the leading end of the trailing strip, and welds the leading and trailing strips at the cutting position and cuts off the excess material. Regarding.

For the production of steel plate strips, equipment for pickling, rolling, etc. is incorporated into a continuous processing line, and in order to continuously feed strips into the continuous processing line, it is necessary to The joint at the tip is unreliable.

However, in the past, the rear end of the strip was cut to shape at another location, then the end was inserted into a welding machine, and then positioned and welded together, resulting in poor positioning accuracy and poor welding. In this case, the joint end of the strip is clamped with a current-carrying electrode, but it is necessary to change the dimension from the side of the electrode to the welding joint end (extrusion margin) according to the thickness of the strip. Since changes are made using a gauge bar, adjustments cannot be made steplessly, and since the end of the weld joint collides with the gauge bar, the impact causes deformation of the end, reducing the reliability of the weld. Furthermore, since the adhesion between the welded joint end and the gauge bar is poor, the parallelism of the jointed end deteriorates, resulting in a problem that the reliability of the welded part deteriorates.

The object of the present invention is to provide a butt welding device that can automatically weld the rear end of a leading strip and the tip of a trailing strip at high speed, and can obtain a highly reliable weld. , an upset cylinder having a stroke adjustment device that can be set at an arbitrary position is provided on the input side frame so that the input frame can move in the longitudinal direction of the strip advancing direction, and a lower welding clamp is provided on the strip exit side of the input side frame. and an upper welding clamp that can be raised and lowered, an exit frame is provided at an appropriate interval on the exit side of the strip of the entry frame, and a lower welding clamp that can be raised and lowered is provided on the entry side of the strip of the exit frame. A frame is provided with an upper welding clamp that can be moved in a direction perpendicular to the direction in which the strip travels between the input side welding clamp and the exit side welding clamp. An upper electrode plate that can be adjusted and moved up and down, and a lower electrode plate that can adjust the spacing in the front and rear direction of the strip traveling direction are provided. It has an upper blade whose position can be adjusted in the front and rear direction of the strip and which can be raised and lowered, and a lower blade whose position can be adjusted in the front and rear direction of the strip traveling direction.By lowering the upper blade, the rear end of the leading strip and the trailing strip can be moved The frame is provided with a shear for cutting and removing the tip at the same time, and the frame is movable in a direction perpendicular to the direction in which the strip travels, and an upper cutting tool that can be raised and lowered and whose position is adjustable in the front and back direction of the strip travel direction is provided. and a lower cutting tool whose position is adjustable with respect to the longitudinal direction of the strip traveling direction, and the upper and lower cutting tools are made to traverse the stripline by moving a frame movable in a direction perpendicular to the strip traveling direction. The present invention is characterized in that a flash trimmer is provided for cutting and removing excess thickness at the strip joint. Embodiments of the present invention will be described below with reference to the drawings.

An entry frame support bearing 4 is disposed on the inside surface of the welder bed 2 installed on the foundation 1 on the entry side of the strip, and the entry frame 3 is attached to the bearing 4 so as to be movable in the front and back direction in the direction in which the strip advances. , and a bracket 9 fixedly fixing one end of the rods 7 and 8 of the upset cylinders 5 and 6 provided on the welder bed 2 to the outer side of the entrance frame 3.
A stroke adjustment device 1 is attached to the rear side of the welder bed 2 in the middle part of the other end side of the rods 7 and 8.
0, and at the other ends of the rods 7, 8, stroke detectors 11, 1 such as potentiometers are used to adjust the stroke amount according to the thickness of the strips to be welded together.
Screw 2 together.

An exit frame thrust bearing 14 is provided on the outside of the strip exit side of the welder bed 2, and the exit frame 13 is mounted on the thrust bearing 14 so as to be movable up and down, and a cotter guide provided inside the exit frame 13. 15, and the shaft 17 fixed to the end of the welder bed 2 is attached to the bracket 1 on the front side of the welder bed 2.
8 and screw together with the moving device 19 disposed on the top.

Therefore, a constant distance is maintained between the above-mentioned inlet frame 3 and outlet frame 13 even when the inlet frame 3 is closest to the outlet frame 13. Upper welding clamps 20 and 21 are disposed at the end of the entry frame 3 on the strip exit side and at the end of the exit frame 13 on the strip entry side, respectively, and the welding clamps 20
, 21 with a strip clamp cylinder 22, 2
3, and a strip clamp cylinder 22, 2
One end of arm levers 26, 27, which are pivotally connected to the entrance frame 3 and the exit frame 13, respectively, are pivotally connected to the upper ends of the vertical links 24, 25, which are pivotally connected to the upper side of the arm lever 26. , 27, a hydraulic cylinder 28, 2
The tip of the rod 9 is pivotally connected, and the hydraulic cylinder 28,
29 are disposed on brackets 30 and 31 provided at the upper ends of the entry frame 3 and the exit frame 13.

Lower frames 3, 13 of upper welding clamps 20, 21
The lower welding clamps 32, 33 are fixed at appropriate positions on the inside of the holder so that the strip can pass over them.

Guides 34, 35 are integrally provided below the facing surfaces of the lower welding clamps 32, 33, and the clamps 36, 37 are slid on the guides 34, 35 in the front-rear direction in the direction in which the strip moves. 3.
A guide rail 38 having an L-shaped groove and a guide rail 39 having a concave groove are disposed on the legs 6, 37 so as to be movable up and down, and shafts 40,
41 will be provided. The shafts 40 and 41 are inserted into holes drilled below the lower welding clamps 32 and 33, respectively.
Although not shown in detail, rail adjustment devices 42 and 43 are provided at the ends of the shafts 40 and 41 so as to be able to move the shafts 40 and 41 in the front and rear directions by appropriate means.

A power supply plate 4 is formed at the lower end of the lower welding clamps 32, 33 so that it can be bent by moving the lower welding clamps 32, 33 back and forth or up and down in the direction of strip movement.
4 and 45 are brought into contact with each other, and the other end is fixed onto a power transformer 47 which can run on a rail 46 laid at the bottom of the pit. The above-mentioned upper welding clamp 20
, 21 are provided with guide rollers 48, 49 at the bottom of the upper welding clamps 20, 21.
When the welding clamp 21 is lowered, it enters a recess in the upper surface of the lower welding clamps 32, 33 and can hold the strip at a predetermined height during feeding.

Further, tables 50 and 51 for feeding the strip are fixed to the input side frame 3 and the output side frame 13,
Before and after the tables 50 and 51, when the tip of the trailing strip S2 and the rear end of the leading strip S1 are inserted into a butt welding device for welding, the trailing and leading strips S2, S,
Side guide 52 for centering in the board width direction
, 53 are provided. Although not shown, the side guides 52 and 53 are movable in the width direction of the strip by appropriate means, and at the bottom of the side guides 52 and 53 there are guide rollers 54 for feeding the strip. 5
5 is provided. Inlet frame 3 and outlet frame 1
A box-shaped frame 56, which is movable in a direction perpendicular to the direction in which the strip travels, is disposed within the interval formed between the parts facing each other.

The box-shaped frame 56 is hemmed onto the foundation and supported by support rolls 58 of support frames 57, 57', and a rack 59 is provided at the bottom of the box-shaped frame 56, and the rack 59 is attached to a suitable foundation. It meshes with a pinion 62 driven by a motor 60 and a speed reducer 61 provided above. A post 63 is erected integrally with the support frame 57 on the support frame 57, and a guide roller 64 provided at the upper end of the post 63 is brought into contact with the upper surface of the box-shaped frame 56, so that the box-shaped frame 56 It has the function of guiding and reinforcing the box-shaped frame 56 when traveling. A shear 65 is disposed on one side of the box-shaped frame 56 in the width direction (perpendicular to the direction of strip movement) for cutting the rear tips of the leading and trailing slopes Sl and S2 to form a welded joint end. do.

The shear 65 consists of an upper blade frame 66 and a lower blade frame 67, and the upper blade frame 66 has a link 6 which is pivotally connected to each other.
8, 69, and 70, and can be raised and lowered by a shearing cylinder 71 provided on the side of the box-shaped frame 56. The blade frame 67 is supported at the bottom of the box-shaped frame 56. The upper blade frame 66 includes a frame body 72 having a groove and an upper blade holder 7 having a protrusion that fits into the groove.
3, the lower blade frame 67 has a lower part fixed to the lower part of the box-shaped frame 56, and a frame main body 74 having a concave groove on the upper surface, and a lower blade holder 75 that fits into the concave part. The above-mentioned upper blade holder 73 and lower blade holder 75 both have a geared motor 76 and an intermediate shaft.
JMoV, worm reducers 78, 79 attached to the frame bodies 72, 74, and a screw shaft 80 as shown in Fig. 5
, 81, etc., so as to be slidable in the longitudinal direction of the strip traveling direction.

The sides of the frame main body 72 of the upper blade frame 66 fit into guides 82 and 83 provided on the sides of the box-shaped frame 56, so that the upper blade frame 66 can be raised and lowered vertically without any problem, but horizontally. movement is restricted.

Further, a card pin 84 is provided at the lower part of the upper blade holder 73, and the guide pin 84 can penetrate into a guide hole 85 provided in the lower blade holder 75 when the upper blade frame 66 is lowered. Furthermore, a positioning stopper 87 for stripping is fixed to the lower central part of the two sets of upper blades 86 provided on the upper blade holder 73.
A hole is provided in the portion where the lower blade 88 is attached so that the rear tips of the leading and trailing strips Sl and S2 can be cut without any problem. Upper electrode plates 90 and 91 are provided at approximately the center in the width direction of the box-shaped frame 56 via a clamp cylinder 89 so as to be movable up and down, and brackets 92 and 91 are provided at the sides of the upper electrode plates 90 and 91, respectively.
93 is installed protrudingly. A spacing cylinder 94 is mounted between the brackets 92 and 93, and the outer end of the bracket 92 is connected to a guide 95 mounted on the box-shaped frame 56.
The upper electrode plates 90 and 91 are fitted into each other so that the upper electrode plates 90 and 91 can be moved up and down without any trouble. Note that the upper electrode plates 90, 91
The strip can also be moved somewhat in the direction in which the strip travels. As shown in FIG. 5, 2 and E, a substantially T-shaped support 97 is provided protruding from a bracket 96 provided at the bottom of the box-shaped frame 56, and a lower electrode plate is attached to the upper part of the support 97 via a suitable insulating material. A horizontal arm 100 fixedly attached to the side of 98 is placed,
Furthermore, a horizontal arm 101 is placed on the upper part of the horizontal arm 100, which is fixed to the side of the lower electrode plate 99 via a suitable insulating material.

Brackets 102 and 103 are provided protrudingly at positions that do not interfere with the horizontal arms 100 and 101 of the lower electrode plates 98 and 99, and a spacing cylinder 104 is installed between the brackets 102 and 103, and the outer end of the bracket 102 is The lower electrode plates 98 and 99 are fitted into guides 105 provided on the box-shaped frame 56 so that they can be raised and lowered in the vertical direction, and are also movable to some extent in the direction in which the strip travels.

Further, when the box-shaped frame 56 moves and the upper and lower electrode plates 90, 91, 98, 99 are inserted into the stripline, the lower side of the lower electrode plates 98, 99 is attached to the lower welding clamp 32,
It is formed so as to be able to slide on guide rails 38 and 39 provided on guides 34 and 35 protruding from the lower side of 33. On the other side in the width direction of the box-shaped frame 56, a flash trimmer 106 is disposed for cutting off excess thickness that is generated at the joint when the rear end portions of the leading and trailing strips Sl and S2 are welded together.

The flash trimmer 106 is connected to the upper tool holder 107.
The upper tool holder 107 is connected to the upper part of the box-shaped frame 56 through links 109, 110, 111, and can be raised and lowered by a pressurizing cylinder 112 having one end pivotally connected to the box-shaped frame 56. It's becoming like that. Further, the lower tool holder 108 is mounted on a suitable pedestal at the bottom of the box-shaped frame 56. The upper tool holder 107 has a holder mounting frame 113, and guide blocks 114, 114' provided on both sides of the holder mounting frame 113 in the width direction are inclined at an appropriate angle with respect to a direction perpendicular to the traveling direction of the strip.
4, 114', and a main body 116 having an arm 115 (see FIG. 4) fitted into a hole of 4,114', a tool center position changing device 117 at one end of the guide block 114, and a guide roller 118 on the main body 116. and an upper cutting tool 119 are provided, respectively.

The lower tool holder 108 has guide blocks 120, 120' provided on both sides in the width direction. The guide block 120 is inclined at an appropriate angle with respect to the direction perpendicular to the direction in which the strip travels.
, 120';
A tool center position changing device 122 is installed at one end of the cutting tool 20, and guide rollers 123, 124 and a lower cutting tool 12 are installed at the main body 121.
5 are arranged respectively.

The guide rollers 118 and 123 are formed so that they can hold the strip from both sides when the flash trimmer 106 is inserted into the stripline, and the guide roller 124 is located below the lower welding clamps 32 and 33. It is formed so that it can run on guide rails 38 and 39 provided in the. Further, both sides of the upper cutting tool holder 107 are fitted into guides 126 provided on the box-shaped frame 56, and are formed so as to be able to move up and down in the vertical direction, but not to move in the horizontal direction. When the preceding strip S1 is being rewound by a payoff reel (not shown) and sent to the subsequent process, the upper welding clamps 20, 21 of the butt welding device
is located above by hydraulic cylinders 28 and 29.

Therefore, since the guide rollers 48 and 49 attached to the upper welding clamps 20 and 21 are also located upward (as shown in FIG. 1), they align with the stripline and support the leading strip S1. is continuously fed to the subsequent process without contacting the lower welding clamps 32, 33. On the other hand, the box-shaped frame 56 is moved by the pinion 62 via the motor 60 and reduction gear 61 with the shear cylinder 71 extended and the upper blade frame 66 of the shear 65 raised.
5 is inserted into the space formed between the inlet frame 3 and the outlet frame 13. Since the upper blade frame 66 is raised, the leading strip S1 and the upper blade holder 73 do not interfere with each other. Once the shear 65 is inserted into the stripline, the upset cylinder 5 is operated to weld together the gap between the opposing sides of the upper and lower welding clamps 20, 32 and 21, 33. The geared motor 76 drives the worm reducers 78 and 79 via the intermediate shaft J and V to rotate the screw shafts 80 and 81, and the upper blade holder 73 and lower blade holder are rotated. 75 in the longitudinal direction of the strip traveling direction to a predetermined position (substantially in the center of the interval). While the leading strip S1 is passed through the unwinding butt welding device and sent to the subsequent process, the leading end of the trailing strip S2 is prepared for unwinding and welding by another unwinding machine (not shown). . When the leading strip S1 is completely rewound and its trailing end reaches the downstream side of the butt welding device, its end face is detected by a detector (not shown), and the bridle roll (not shown) on the downstream side is stopped. It is stopped by

Even if the bridle roll stops, the strip is continuously fed to the processing line for the subsequent process by a known accumulator, so there is no problem with the strip processing operation for the subsequent process. On the other hand, when the rear end of the leading strip S stops, the shear 6 inserted into the stripline
The upper blade frame 66 of 5 is lowered somewhat by the shortening of the shearing cylinder 71, and the strip positioning stopper 87 is lowered until its lower end is positioned below the upper surfaces of the lower welding clamps 32, 33.

Once the strip positioning stopper 87 is in a predetermined position, the aforementioned bridle roll (not shown) is reversed to transport the rear end of the leading strip S1 back to the butt welding device, while the leading end of the trailing strip S2 is not shown. The strips are fed to the butt welding apparatus by pinch rolls, and the rear tips of the leading and trailing strips S1 and S2 are brought into contact with the strip positioning stopper 87 of the shear 65 to position the rear tips. Next, the leading and trailing ends of the trailing strip S2 and the leading strip S1 are centered in the board width direction using the side guides 52 and 53, and then the hydraulic cylinders 28 and 29 are actuated to close the upper welding clamp 20.
, 21 to lower the strip clamp cylinder 20.
, 21, 32, 33, the trailing leading strip S2, Sl
Clamp the front and rear ends of the (see Figure 5 A). At the same time, a rotatable looper (not shown) forms a loop (not shown) at a position somewhat distant from the butt welding device of the trailing strip. When clamping is completed, the shear cylinder 71 is operated to lower the upper blade frame 66, and the rear tips of the leading and trailing strips Sl and S2 are moved to the upper and lower blades 86,
88 for cutting and removal at the same time.

In this case, the cutting removal width (0 is always constant, so the protrusion margin of the trailing and leading strips S2 and Sl is 8-1, which is the interval (range)
can be set arbitrarily according to the thickness of the strip (see Figure 5). When the cutting is completed, the upper blade frame 66 is moved to the shear cylinder 71.
It rises due to When the cutting of the leading and trailing strips Sl and S2 is completed, the motor 60 and the reducer 61 are driven to move the box-shaped frame 56 by the pinion 62, and while pushing out the shear 65 from inside the strip line, the upper and lower electrode plates 90,
Insert 91, 98, 99 into the stripline.

Then, the lower electrode plate 99 is fitted into the guide rail 39 disposed on the lower side of the lower welding clamp 33 and becomes positioned (see FIG. 5C). Note that since the upper surface of the lower electrode plate 99 is inserted into the strip line in a state below the lower surface of the strip, there is no interference between the lower electrode plate 99 and the strip. Upper and lower electrode plates 90, 91, 9
8 and 99 come to a predetermined position within the stripline, the box-shaped frame 56 stops traveling, and at the same time, the inlet frame 3 is cut by the upset cylinder 15 to the outlet frame 13 side to a width of approximately one shear cut and removal width 5. Move by the corresponding amount.

Therefore, the rear tips of the leading and trailing strips S1 and S2 are almost in contact or on the verge of contact, while the lower end of the lower electrode plate 98 is at the lower guide rail 3 of the lower welding clamp 32.
8, the sides of the upper and lower welding electrode plates 90 and 98, the sides of the upper and lower welding clamps 20 and 32, and the upper and lower welding electrode plates 9
Contact pressure is generated between the side portions of 1 and 99 and the side portions of the upper and lower welding clamps 21 and 33 due to the pressure applied by the upper and lower welding clamps 20, 32, 21 and 33, so that they are in close contact with each other. Next, the rail adjustment devices 42 and 43 adjust the height of the rails 36 and 37.
slide and raise the lower electrode plates 98, 99,
Lower welding clamp 32,
Make it the same surface as the top surface of 33. Then, the lower electrode plate 98
, 99 shows the trailing strip S2 and the leading strip S.
1, respectively. When the height adjustment is completed, the clamp cylinder 89 is operated to lower the upper electrode plates 90, 91, and the rear and leading strips S2, Sl
The respective ends of the electrodes are clamped by upper and lower electrode plates 90, 98, 91, and 99, respectively.

Thereafter, the power transformer 47 is connected to the rear leading strips S2, S through the power supply plates 44, 45, the guides 34, 35, the joints 36, 37, the side surfaces of the lower welding clamps 32, 33, etc.
, is energized to generate sparks due to electrical resistance at the ends of the trailing and leading strips S2, S, and at the same time heating and melting the ends of the trailing and leading strips S2, S1, and moving the trailing strip S2 into the upset cylinder. 16 causes the leading strip S to advance toward the side. After the leading and trailing ends of the trailing strips S2 and Sl are heated and melted to a state suitable for welding, the trailing strip S2 is further rapidly advanced toward the leading strip S by the upset cylinder 16, and is then joined to the leading strip S1. Pressure welding is performed with the trailing strip S2 (see FIG. 5-2). Note that when the upset cylinder 6 is operated during pressure welding, the entrance frame 3
moves to the exit frame 13 side, and the upper welding clamp 20
The lower welding clamp 32 moves toward the exit frame 13 while clamping the trailing strip S2. Also, upper welding electrode plate 90 and lower welding electrode plate 9 on the entry side frame 3 side.
8 has its side portions in close contact with the upper welding clamp 20 and the lower welding clamp 32 as described above, so that the upper welding clamp 20 and the lower welding clamp 32 are attached to the exit frame 13.
When moving to the side, the rods of the spacing cylinders 94, 104 move back in synchronization with the moving speed of the welding clamps 20, 32, and the welding electrode plates 90, 98 move toward the welding clamps 20.
, 32, and moves to the exit frame 13 side in synchronization with the welding clamps 20, 32, and welding is performed. In this manner, by reducing the distance between the upper and lower welding electrode plates 90, 91, 98, and 99, welding of the trailing and leading strips can be performed without any problem. Once the welding is completed, the loop of the trailing strip S2 becomes completely flat. If the thicknesses of the ends of the leading and trailing strips Sl and S2 are different when welding together, the handle moving device 19 is driven to raise and lower the exit frame 13 and the welding process is performed when the leading and trailing strips Sl and S2 are welded together. It is necessary to pre-adjust the height of the end of the leading strip S1 to a convenient position. After the welding process is completed, there is excess thickness on the front and back surfaces of the joints of the strips.

Therefore, it is necessary to cut off the excess material using the flush trimmer 106, but the above-mentioned leading and trailing strips S, S2
During welding work on the rear tip, use the flash trimmer 1.
06 must be adjusted in advance. That is, since the extension amount differs depending on the thickness of the strips to be welded together, the welding position also shifts in the front-rear direction in the direction in which the strips travel, depending on the thickness of the strips.

Therefore, the tool center position changing devices 117, 122 are driven to move the upper and lower tools 119, 125 in the forward and backward direction of the strip's progress so that the center positions of the upper and lower tools match the center position of the weld joint, and The bite holder 107 is lowered by the pressure cylinder 112. When the welding of the strips is completed, the upper electrode plates 90 and 91 are raised by the clamp cylinder 89, and at the same time the lower electrode plates 98 and 99 are moved up and down by the rail adjustment device 42.
43 to move the strips 36, 37 to lower them, creating a gap between the upper surfaces of the lower electrode plates 98, 99 and the lower surfaces of the strip, and then move the box-shaped frame 56 to lower the upper and lower electrodes. Boards 90, 91, 98, 9
9 from inside the stripline, and the flash trimmer 106 is inserted into the stripline.

Then, the guide rollers 123 on the upper and lower electrode plates match and contact the lower surface of the strip, and the guide rollers 118
rides on the top surface of the strip and the guide roller 118,1
23 sandwich the front and back surfaces of the strip, and guide rollers 124 on the upper and lower electrode plate sides ride on guide rails 38 and 39 on the lower side of lower welding clamps 32 and 33 and move while being guided. On the other hand, a constant force is applied to the surface of the strip by a pressurizing cylinder 112 via a guide roller 118, but since the upper tool holder 107 is connected by parallelogram links 109, 110, and 111, the upper tool tool holder 107 is The position of the holder 107 in the height direction is always in accordance with the thickness of the plate, and can be maintained horizontally (automatic gap change). As the box-shaped frame 56 moves, the excess thickness generated on the front and back surfaces of the strip can be removed using the upper and lower cutting tools (see FIG. 5E). Once the excess thickness has been cut and removed, the cutting tool holder 107 on the flush trimmer 106 is raised by the pressure cylinder 112, and the upper welding clamps 20, 2 are raised.
Strip clamp cylinder 1 22, 2
3, the hydraulic cylinders 28 and 29 are activated to raise the upper welding clamps 20 and 21.

At the same time, the guide rollers 48 and 49 also rise and come into contact with the lower surface of the strip. Therefore, a bridle roll (not shown) in the downstream process of the butt welding apparatus is driven once to continuously feed the strip to the downstream process. While the strip is being fed to the subsequent process, the box frame 56 is moved in the opposite direction to the direction in which it was moved in the above operations, and the shear 65 is inserted into the strip line again to weld the next strip. Prepare for the meeting.

By repeating this operation, the strip can be continuously fed to the subsequent process. It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention. As mentioned above, the butt welding device of the present invention can weld the preceding and following strips at the same location.
) After positioning the rear ends of the leading and trailing strips, they are clamped with a welding clamp and the rear ends are cut and shaped at the same time, so there is no need to readjust the joint ends and the optimal joining conditions can be set. There is no need to use gauge bars or cross ast devices as in known butt welding equipment.

() When cutting the ends of the strip, the distance between the welding clamps can be set arbitrarily, and then the current-carrying electrode can be inserted from the outside and the strips can be welded together. The amount of welding can be adjusted steplessly and continuously from zero to achieve the most convenient condition for each welding process (in known welding machines, the adjustment of the amount of welding is done in stages).

) Therefore, it helps improve the quality of the strip. (Auto) Cutting, welding, and removing excess material can be performed in the same place, which simplifies the structure of the main body.Furthermore, each device can be carried out of the stripline, making maintenance easier. (5) Since an electrode plate is inserted between the welding clamp of the input frame and the welding clamp of the output frame and the electrode plate is pulled out after welding, a gap is created between the welding clamps.
Excess meat can be removed while inserting a flush trimmer.

(7) Since the distance between the welding clamps can be detected and set appropriately, the work can be completely automated and welding can be performed with high reliability.

(b) An electrode plate for welding can be inserted into the stripline while the shear is being carried out of the stripline, and a flash trimmer can be inserted into the stripline while the electrode plate is being carried out of the stripline. Since it is possible to cut and remove excess material while inserting the flash trimmer into the stripline, the time interval required for one cycle is shortened, contributing to improved productivity.

In addition to the welding clamps provided on the inlet and outlet frames, the strip can also be clamped by an electrode plate inserted between the welding clamps, making it possible to clamp the strip by an electrode plate inserted between the welding clamps. It is possible to reduce the protrusion of the rear end portions of the leading and trailing strips, and therefore, even when pressure welding is performed, the strips do not buckle, so that the product quality can be improved.

Since the strip can be clamped by the electrode plate inserted between the welding clamps, there is no need to release the welding clamps after the strip is clamped with the welding clamps until the pressure welding process is completed, and the strips can be processed and delivered immediately. The parallelism of the leading and trailing ends of the strip is well maintained.

Various excellent effects can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the butt welding apparatus of the present invention, FIG. 2 is a view taken along the - arrow in FIG. 1, showing the electrode plate inserted into the strip line, and FIG. - arrow view in Figure 2,
FIG. 4 is a detailed plan view of the center position changing device of the flash trimmer, and FIGS. 5A to 5E are explanatory diagrams of the operating sequence of the butt welding device of the present invention. 3 is the entrance frame, 5 and 6 are the upset cylinders 1 and 1.
3 is the exit frame, 19 is the cotter moving device, 20, 2
1 is an upper welding clamp, 32 and 33 are lower welding clamps, 47 is a power supply transformer, 56 is a box-shaped frame, 65 is a shear, 90 and 91 are upper electrode plates, 98 and 99 are lower electrode plates, 106 indicates the flash trimmer.

Claims (1)

[Claims] 1. An upset cylinder having a stroke adjustment device set at an arbitrary position is provided on the input side frame so that the input frame can move back and forth in the strip advancing direction, and a lower welding clamp and an elevating device are installed on the strip exit side of the input side frame. an upper welding clamp that can be moved up and down; an exit frame is provided at an appropriate interval on the exit side of the strip of the input frame; and a lower welding clamp that can be raised and lowered on the strip entry side of the exit frame; A frame is provided with an upper welding clamp and is movable in a direction perpendicular to the strip traveling direction between the input side welding clamp and the exit side welding clamp, and the interval in the front and rear direction of the strip traveling direction is adjusted. An upper electrode plate that can be raised and lowered and a lower electrode plate that can adjust the distance in the front and back direction of the strip traveling direction are provided, and a frame that is movable in the direction perpendicular to the strip traveling direction is provided with It has an upper blade whose position can be adjusted in the direction and which can be raised and lowered, and a lower blade whose position can be adjusted in the front and back direction of the strip traveling direction. By lowering the upper blade, the rear end of the leading strip and the tip of the trailing strip are removed. A shear is provided for cutting and removing the strip at the same time, and the frame is provided with a shear movable in a direction perpendicular to the strip traveling direction, and an upper cutting tool and a strip advancing part whose position can be adjusted in the longitudinal direction of the strip traveling direction and can be raised and lowered. and a lower cutting tool whose position is adjustable in the front-back direction of the direction, and the upper and lower cutting tools are moved across the strip line by moving a frame that is movable in a direction perpendicular to the strip traveling direction, thereby forming a strip joint. A butt welding device characterized in that it is equipped with a flash trimmer for cutting off excess metal.