JPH11285879A - Method and equipment for joining in longitudinal direction of belt-like material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high productivity by transporting a belt-like material to be welded, at each length equivalent to integer times as long as the post-welding length of a product, welding with the longitudinal abutting part bound at the unit of this length, and carrying it out. SOLUTION: A pass restraining device immediately before and after the welding equipment as well as pinch rolls is released, making belt-like materials 1a, 1b unrestrained. Then, one mechanism 17a for pressing the material is moved to a prescribed position, with the material 1b pressed by the other mechanism 17b from the unwelding side, making the ends of the materials abutted on each other. Both materials 1a, 1b to be welded are restrained by successively drawing down clamp devices 16a, 16b, with punch holes 19a', 19b' made by punching devices 18a, 18b on the end of the materials before they become the final product, and with the ends welded together while the welding equipment is operated and moved from the starting point 15 to the ending point 15' of welding. The belt-like materials 1a, 1b are kept unrestrained, transported by a distance αand restrained until the punch holes 19a', 19b' pass into those holes 19a, 19b, while this operation is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a longitudinal joining apparatus and method for producing a wider band by joining two or more strips in the longitudinal direction with their edges abutting each other. About. Here, the belt-like body referred to here is a cold-rolled steel sheet and, if necessary, an annealed sheet, or zinc-plated, tin-plated, surface-coated, etc. Used in the manufacture of steel furniture and electrical appliances. In particular, it is often used in the manufacture of tailored blanks for automobiles.

[0002]

2. Description of the Related Art In the parts processing industry of automobiles and the like, materials having different thicknesses or different materials (materials / surface treatments) are used in order to reduce weight, improve workability, or reduce material costs.
In recent years, it has been particularly remarkable that the components are joined to form parts. In such a case, it is common to cut the strips of the respective materials into short pieces in advance to form pieces, and then perform the joining process between the materials at another location.

[0003] However, in such a joining apparatus for cutting by cutting into a short length, a cutting line and a joining line are indispensable, and the number of lines is increased. Dominates, production volume / line
The time is short, and the productivity of manufacturing the parts must be extremely low.

[0004] In recent years, in order to improve the problems of the above-mentioned general joining equipment, a technique in which the edges of adjacent strips are butted together and continuously welded in a longitudinal direction by a fixed laser welding apparatus. Is being developed. For example, in Japanese Patent No. 262271, two strips fed by separate lines are sandwiched from both sides by a two-part large-diameter tension roller having an axis in a direction perpendicular to the conveying direction at a welding position. It is installed in pairs, the welding head of the laser welding device is provided inside the hollow shaft of the pulling roller, and the laser beam is passed through the gap between the two pulling rollers to weld the butt edges. .

[0005]

However, the above-mentioned Patent No. 262
The continuous welding method for a belt-shaped body disclosed in Japanese Patent No. 2271 is a type in which a welding position is restrained by a roller sandwiching the belt-shaped body, so that a restraining range is narrow. As a result, the effect of heat shrinkage deformation during welding spreads to places other than the constrained part, especially to the part before welding, and to the butt edge of the adjacent strip,
There is a drawback that a gap is generated or conversely an overlapping situation occurs, and it is difficult to obtain a uniform welded seam continuously.

[0006] The present invention solves the above-mentioned problems, and joins a plurality of strips in a stable state in the longitudinal direction to produce a wider strip, thereby increasing the productivity. It is an object of the present invention to provide a joining method and a joining facility capable of achieving achievable joining.

[0007]

To achieve the above object, the gist of the present invention is as follows. (1) A band having two or more strips is joined in the longitudinal direction to form a wider band. In the longitudinal joining method for manufacturing a product, a belt-like body to be joined is transported for each length corresponding to an integral multiple of the length of a joined product, and the longitudinal butt is restrained in units of this length. And join,
A method of joining strips in the longitudinal direction, which is carried out in units of this length after joining. (2) The method according to (1), wherein laser welding or seam welding is used as the joining means. (3) In a longitudinal joining facility for joining a strip of two or more strips in the longitudinal direction to produce a wider strip, the strip is attached to the end of the strip immediately before the joining device. A punching device for punching holes for conveyance is arranged, and a position fixing device for stopping the position of the punch holes and a wide band conveyance device for discharging a wide band after the band is joined are provided immediately after the joining device. A longitudinally joining apparatus for a strip-shaped body. (4) The joining equipment in the longitudinal direction of the strip according to (3), wherein a laser welding device or a seam welding machine is provided as the joining device. It is in.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention makes it possible to join, for example, strip-shaped steel plates in the longitudinal direction. In particular, the invention has provided a tailored blank material for automobiles at low cost and with high productivity. . Hereinafter, the present invention will be described in detail. In the method of the present invention, when a band formed of two or more strips is joined in the longitudinal direction to produce a wider band, the band to be joined is formed of the length of the product after joining. It is transported for each length equivalent to an integer multiple, and the longitudinal butt portion is restrained and joined in this length unit, and after joining, it is carried out in this length unit, but this is the Particularly important for continuous processing.

That is, by performing the joining process of the strip-shaped steel sheets in units of an integral multiple of the length of the product, it becomes possible to restrain the strip-shaped steel sheets at the same clamping force as the joining of the cut plates at the time of joining.
It is possible to prevent escape (non-joined portion) of the end portion of the strip-shaped steel sheet due to thermal distortion or the like at the time of joining, and to join the end portions of the strip-shaped steel sheet without gaps.

Further, in the facility of the present invention, a punching device is used to obtain a length unit corresponding to an integral multiple of the length of a product after joining. By punching holes at the end of the band by the punching device, the punch holes are detected and cut in the cutting after joining, so the cutting length error is small, and the welding start and end points are also the final products. Outside, or the required strength becomes a small part, and a good final product can be manufactured. In addition, by constraining the punch holes with a pressing device, the joining position (the end on the non-joining side of the band) is held at a constant position in the conveying direction of the band, and the joining device (welding device) is in a band shape. It does not necessarily require a moving mechanism in the width direction of the body, and has a simple configuration. Before and after the joining position,
A path restraining device and a pinch roll are installed for both transporting and restraining the strip.

In the present invention, it is also possible to perform marking at a predetermined position instead of making a punch hole and to detect this by a mark detecting device. It is effective to substitute an accurate transport distance measuring device.

Since a welding machine as a joining device welds a belt-like body in a stationary state by butt welding, there is no particular limitation in terms of equipment, and a general-purpose welding device may be used. For example, a laser welding machine, a seam Welders are advantageous. As a laser welding machine, for example, a CO ₂ , YAG laser can be used. It is also effective for a plasma-assisted laser welding machine and the like.

After joining, the strip is cut into parts on the exit side of the facility of the present invention or in the next step after being wound by a coil. In any case, a punch hole is detected.
Since cutting is performed, the cutting length error is small, and
The end point is also outside the final product or a portion where the required strength target is small, and a good final product can be manufactured. Examples will be described below.

[0014]

(Embodiment 1) FIG. 1 is an overall explanatory view of a tailored coil manufacturing facility, which is an example of an apparatus for joining strips in the longitudinal direction according to the present invention. Two strips 1a, 1b are mounted as coils on two uncoilers 2a, 2b, respectively. The strips 1a, 1b unwound from the uncoilers 2a, 2b are guided to the entrance shears 4a, 4b via the outlet devices 3a, 3b. Entry shear 4a, 4b
After the defective portion at the tip is cut off and the shape is corrected by the levelers 5a and 5b, the free loops 7a and 7b are formed through the pinch rolls 6a and 6b, and further, the bonding device 9 is passed through the path restraining device 8 The ends are welded together. Note that, in front of the path restraining device 8, entry side guides 12a, 12b, 13a, and 13b for aligning the strips 1a and 1b conveyed on different lines with the same line are provided. The pinch roll 14 is disposed after the joining device 9. After joining, the wide band-shaped body is cut into sheets of a predetermined length by the outgoing shear 10 and loaded on the pallet 11.

FIG. 2 shows a specific example of the belt feeding mechanism before and after the joining device 9. These two strips 1a, 1
At the extreme end of the coil, b stops their conveyance when they come out of a predetermined position 15 (this position becomes a joining start point). At this time, the clamping devices 16a, 16b, the band-shaped body pressing mechanisms 17a, 17b, the punching device 18a,
18b is open and a punch hole fixing device (not shown)
Is also open. On the other hand, the path restraining device 8 and the pinch roll 14 immediately before and immediately after the joining device 9 are in a pressed down (restricted) state.

From here, one cycle of the joining operation is started. First, the path restraining device 8 and the pinch roll 14 immediately before and immediately after the joining device 9 are opened, and the strips 1a and 1b are set in a free state (bound). Then, one of the band-shaped pressing mechanisms 17a is moved to a predetermined position, and the other band-shaped pressing mechanism 17b presses the band 1b from the non-welding side to abut the ends of the band. Then
The clamping devices 16a and 16b are sequentially lowered, and the
a and 1b are restricted. At this time, the punching device 18
a and 18b are operated to make punch holes 19a 'and 19b' at the end positions of the strip which is not the final product. In this state, the joining device 9 is moved while operating from the position 15 (joining start point) to the position 15 '(joining end point) in the direction opposite to the conveying direction of the belt-like body, and the ends are joined. W indicates a joining line. After the joining is completed, the joining device 9 returns from the position 15 'to the position 15, and waits. Thereafter, the pinch roll 14 and the pass restraining roll 8 are lowered, and finally, the clamping device 16
b, 16a and the band pressing mechanisms 17b, 17a are sequentially opened, and the band is conveyed until the punch holes 19a ', 19b' become the punch holes 19a, 19b (distance α), and the punch holes 19a, 19b are punched. Hole position fixing device (not shown)
In, restrain. In addition, only at the very tip of the strip, one cycle is performed with the pinch roll 14 under pressure as necessary. Thereafter, this operation is repeated. The lower limit of the distance α is an integral multiple of the component unit length. Thus, the two strips supplied from the payoff reel can be joined in the longitudinal direction.

After joining, the strip is cut into unit lengths by the output shear 10 and mounted on a pallet 11. Since the cutting is performed by detecting the punched holes, the cutting length error is small, and the welding start and end points are outside the final product or the required strength is small, so that a good final product can be manufactured.

The entry side guides 12a, 12b,
13a, 13b can be designed as sliding stops, guide fences, vertical pressure rollers or the like in the form of straight edges. In the case of a guide fence or a sliding linear edge, the burrs at the side ends of the strip are smoothed by friction. The band pressing devices 17a, 17b can also be designed as sliding stops, guide fences, vertical pressure rollers or the like in the form of straight edges.

(Embodiment 2) FIG. 3 is an overall explanatory view of a tailored coil blank manufacturing facility which is another example of a continuous welding apparatus for a strip-shaped steel sheet in the longitudinal direction of the present invention. This example is suitable for a case where strips having the same plate thickness and different materials are joined in the longitudinal direction. The same reference numerals as those in the first embodiment in FIG. 1 denote the same devices and members, and a description thereof will not be repeated.

In FIG. 3, the band-like body after joining through the pinch roll 14 on the exit side of the joining device 9 is temporarily removed from the exit side free loop 2.
0, is cut into a strip of a predetermined length by the output shear 10 via the output side guide 21 and the pinch roll 22, and is continuously formed into a coil by the coiler 24 via the pinch roll 23. It is wound up. Joined coiler 2
In the next step, the strip taken up in step 4 is cut based on the punched holes, and the cutting length error is small, and the welding start and end points are outside the final product, or the required strength target is the same as in Example 1. It is a small part and a good end product can be manufactured.

[0021]

As described above, by applying the technique of the present invention, it is possible to join the strip as it is, and to stably perform the joining while the strip is stationary and restrained. As a result, it is possible to manufacture joined parts materials with extremely high productivity, and the industrial value is enormous. In particular, it can be said that this is the most suitable for manufacturing tailored coil blanks of strip-shaped steel plates.

[Brief description of the drawings]

FIG. 1 is a schematic view of an entire line showing an example of a joining apparatus to which the present invention is applied.

FIG. 2 is a diagram illustrating a belt-like body feeding mechanism before and after the bonding device shown in FIG. 1;

FIG. 3 is a schematic view of an entire line showing another example of the joining apparatus to which the present invention is applied.

[Explanation of symbols]

 1a, 1b Strip 2a, 2b Uncoiler 3a, 3b Outing device 4a, 4b Inlet shear 5a, 5b Inlet leveler 6a, 6b, 14 Pinch roll 7a, 7b Punching device 8 Path restraint device 9 Joining device 10 Outlet shear 11 Pallets 12a, 12b, 13a, 13b Entry side guides 15, 15 'Joining start / end points 16a, 16b Clamping devices 17a, 17b Band-like body pressing mechanisms 18a, 18b Punching devices 19a, 19a', 19b, 19b 'Punch holes 20 Exit side free loop 21 Exit side guide 22, 23 Pinch roll 24 Coiler W Joining line α Feed pitch

Claims (4)

[Claims] In a longitudinal joining method for producing a wider band by joining two or more strips in the longitudinal direction, the band to be joined is formed by bonding the product after joining. A strip-shaped body which is transported for each length corresponding to an integral multiple of the length, and is joined by restraining the longitudinal abutting portion in this length unit, and is carried out in this length unit after joining. Longitudinal joining method. 2. The method according to claim 1, wherein laser welding or seam welding is used as the joining means. 3. In a longitudinal joining facility for joining a strip of two or more strips in the longitudinal direction to produce a wider strip, the strip is attached to an end of the strip just before the joining device. A punching device for punching a hole for transporting a band-shaped body is arranged, and a position fixing device for stopping the position of the punch hole immediately after the joining device, and a wide band conveying device for discharging a wide band-shaped body after the band-shaped body is joined. A long-distance joining device for a strip-shaped body, characterized in that: 4. The apparatus according to claim 3, wherein a laser welding device or a seam welding machine is provided as the joining device.