JPS61276770A - Joining method for sheet - Google Patents

Abstract

PURPOSE:To perform a good welding without causing the gap of a butt part and the slippage in the width direction by fixing with overlapping the preceding material rear end part and succeeding material front end part and by performing the cutting and welding in order by moving the cutting means and welding means. CONSTITUTION:The preceding material rear end part and succeeding material front end part of a hoop material 1 are pinched and fixed in the state of overlapping them by pinching rollers 20, 22. The overlapping part by the shear cutting materials 27, 28 is cut by using a cutting means 25 and the residual material caused by the cutting is discharged by using an air blow and chute 29. A welding means 26 is then located at the cutting position by moving the cutting means 25 and welding means 26 by the distance l and the butt part of the hoop material 1 is located at the center of the recessed groove 32a of a backing bar 32. The welding is performed by a welding torch 30 after fixing to the backing bar 32 the hoop material 1 by a welding clamp 31.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for joining thin sheets that are continuously supplied to a processing process.

[Prior art]

The thin plate supplied to the pressing process or the chipping process of IC lead frames must be continuous without interruption.

Figure 3~#! Figure r is a schematic diagram showing the supply section of the thin plate. A thin plate (hereinafter referred to as hoop material) l is wound into a coil shape, sent out from this winding part, held between rear pinch rollers 2, 2, passed through a joint part 8, and then passed through a front pinch roller. 4, 4, and then sent to a processing step (not shown). The joining part 8 is composed of a cutting part 5 and a welding part 6, and the cutting part 5 and the welding part 6 are arranged at a distance l in the direction of transport of the hoop material 1. Here, the cutting part 5
Are the upper and lower shear cutting materials? , 8, and the welding part 6 includes a welding torch 9, a welding clamp 10° 10, and a groove 11.
A is formed with a back par of 11.

Now, when one roll of the hoop material l is completed, the rear end is cut with the shear cutting material 7.8 (Fig. It is conveyed and the rear end is positioned at the center of the groove 11a of the back par 11. Next, set a new roll of hoop material l, and cut the tip of it using shear cutting materials 7 and 8I (Fig. The hoop material 1 is transported and the rear end of the leading 7-pipe material l, the rear end of the trailing 7-pipe material 1, and the tip of the trailing hoop material 1 are butted together. Then welding clamp to, t
After fixing both hoop materials l with o, this abutting portion is welded with a welding torch 9 (FIG. 6). In this way, a new hoop material 1 is joined to the preceding hoop material 1, and is supplied to the processing process without interruption.

[Problem that the invention attempts to solve]

By the way, in the above-mentioned nine-joint joining method, it is not possible to completely butt together due to slipping of the hoop material 1 during conveyance, warpage of the hoop material 1, bending, etc., and a gap is created between both hoop materials. Sometimes it wasn't completely seamed. Further, although positioning in the width direction is carried out before cutting, since it is transported after cutting, a width deviation may occur at the joint, which may prevent it from passing through the processing line.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a method for joining thin plates that can be joined completely and that does not cause the width difference.

[Means for solving problems]

In order to achieve the above object, the present invention movably provides a cutting means and a welding means, fixes the trailing end of the preceding material and the leading end of the trailing material in an overlapping state, and fixes this overlapping portion. After simultaneously cutting the preceding material and the following material by cutting with the cutting means, the welding means is moved to this cutting location, and the welding means welds the cutting location.

[Effect]

By the method described above, splicing is performed without transferring the hoop material.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are schematic diagrams each showing a supply of hoop material for carrying out a method according to an embodiment of the invention. In these figures, the hoop material l is transferred from right to left in the figures. That is, the hoop material l sent out from the winding section (not shown) is pinched by the rear pinch rollers 20, 20, passes through the joint section 21, and is further pinched by the front pinch rollers 22, 22. , supplied to a processing step (not shown).

In the joining section 21, reference numerals 28 and 24 are fixed clamps that clamp and fix the hoop material 1 when the hoop material 1 is joined. Furthermore, a cutting part 25 and a welding part 26 are arranged at a distance t between both fixed clamps 2° 8 and 24, and the cutting part 25 is located in front of the direction in which the hoop material l is transferred. A welding portion 26 is located at the rear in the direction. The cutting part 25 and the welding part 26 are provided so as to be movable in the transport direction of the 7-ply material 1. When joining, the cutting part 25 and the welding part 26 are movable in the transport direction while maintaining their mutual positional relationship. Just move around and perform cutting and welding. Here, the cutting section 25 consists of upper and lower shear cutting materials 27 and 28, and
．． 28 cuts the hoop material l by shearing force. Also,
The remaining material after cutting is discharged out of the apparatus by an air blower and a chute 29.

In addition, the welding part 26 is equipped with a welding torch 8o and a welding crane 781.
81 and a packer 82 in which grooves 82a are formed, and when welding, welding clamps 81 * 81 are
- The welding torch 80 performs welding at the center of the concave groove 82a by fixing it to the brake pad 82.

In the above configuration, when joining the hoop material 1, the rear end of the preceding hoop material 1 and the tip of the trailing hoop material 1 are overlapped at approximately the middle between the fixed clamps 2B and 2i4. (Figure 1).

At this time, the positions of both hoop materials 1 in the width direction are aligned. The two hoops 1 are then fixed by means of fixing clamps 28, 24, and the overlapped parts are then cut by means of shear cutting members 27.28. As a result, the rear end of the leading hoop material l and the leading end of the trailing hoop material are simultaneously cut.

After each rear end and tip are trimmed and cut,
The rear end and the front end are in abutted state, and no gap is created between the rear end and the front end. Further, the remaining material resulting from cutting is discharged out of the apparatus by an air blower and a chute z9.

Next, the cutting part 25 and the welding part 26 are both moved forward in the transport direction for a distance of ! Moving. As a result, the abutted portions are located at the center of the recess 82a of the back par 82, and then the welding clamp 81.8
After the hoop material 1 is fixed to the back par 82, welding is performed by the welding torch 80.

In this way, since the hoop material is overlapped and cut and the hoop material is not transferred after cutting, there is no gap in the abutted portion, and no deviation occurs in the width direction.

〔Effect of the invention〕

As explained above, according to the present invention, the cutting means and the welding means are movably provided, and the rear end portion of the preceding material and the leading end portion of the succeeding material are fixed in an overlapping state, and this overlapping portion is After simultaneously cutting the preceding material and the following material by cutting with the cutting means, the welding means is moved to this cutting location, and the welding means welds the cutting location. This eliminates the occurrence of gaps or crevices in the width direction, making it possible to produce excellent welded joints with extremely high reproducibility.

Further, welding is always performed at the center of the groove of the back par, so that a similar effect can be obtained.

[Brief explanation of drawings]

1 and 2 are schematic diagrams showing a hoop material supply section for implementing a method according to an embodiment of the present invention, and FIGS. 3 to 3 are diagrams for implementing a conventional method, respectively. FIG. 6 is an enlarged view showing the structure of the welding part. l... Hoop material (preceding material, trailing material), 5, 25
...... Cutting part (cutting means), 6, 26...
・Welding part (welding means). Figure 2 North: :°I#) Tomiwa

Claims (1)

[Claims] After the trailing end of the preceding material and the leading end of the trailing material are cut by the cutting means and the trailing ends and leading ends of each are trimmed, the trailing end and the leading end are butted together, and this butted part is applied to the welding means. In the thin plate joining method of joining thin plates by welding, the cutting means and the welding means are movably provided, and the trailing end of the preceding material and the leading end of the succeeding material are overlapped. After simultaneously cutting the preceding material and the succeeding material by cutting this overlapping portion with the cutting means, the welding means is moved to this cutting location, and the welding means cuts the overlapping portion with the cutting means. A method for joining thin plates, characterized by welding the cut points.