JP3254396B2 - Welding machine having a plurality of welding wire forming devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a resistance welding machine for can materials, and more particularly to a welding machine having a welding wire forming apparatus capable of forming a welding wire into a plurality of different shapes in a welding wire shape forming step. Things.

[0002]

2. Description of the Related Art An example of a conventional welding wire shape forming method will be described with reference to FIG. First, the welding wire 1 sent by the feeding device is pulled up and down by a tension applying roll 2 and has upper and lower two wires 1 having wire forming grooves.
It is pressed and formed by the pair of rolls 3 and 4. The formed welding wire 1 is rotated by an angle of 180 ° by a wire reversing device 5, further rotated by an angle of 180 ° by a wire reversing device 8 via support rolls 6 and 7, and supplied to a lower electrode wheel 9. The wire 1 used for outer can welding on the lower electrode wheel 9 passes through the supporting rolls 10 and 11 and the cleaning device 12 to the wire reversing device 1.
3 and is rotated by 180 ° and supplied to the upper electrode wheel 14 to be used for welding inside the can. The used welding wire 1 is guided to the outside of the welding machine by the support roll 15 or the like, and then cut and collected by the wire cutting device 16.

The material to be welded 25 is continuously conveyed horizontally by a conveying device, that is, from left to right in FIG. 9, and is welded by the upper and lower electrode wheels 14 and 9 to form a can body.

[0004] The shape of the welding wire is a sectional shape of the wire as shown in Fig. 11, and the shape of the portion 17 that comes into contact with the material for the can is one of the factors that determine the quality of welding.

[0005] The sectional shape of the welding wire is shown in FIG.
This is carried out by raising and lowering one roll 3 of the shape forming roll shown in FIG. 12 so as to clamp the welding wire 1 between a pair of two rolls 3 and 4 (hereinafter referred to as “prior art”).

[0006]

In the prior art, since the welding wire forming apparatus H is composed of a set of welding wire shape forming rolls, only one type of welding wire shape can be formed as it is. For this reason, when welding materials having different welding characteristics are required, when a plurality of different types of welding wires are required, it is necessary to replace the welding wire shape forming roll. This roll change operation requires interrupting the welding operation of the can and stopping the operation of the welding machine, which has led to a decrease in the production capacity of the welding can and the use of extra welding wire. Also, it is impossible to replace the welding wire shape forming roll to maintain the welding can production capacity,
Variations in the welding properties of the can materials could not be tolerated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, to enable a plurality of types of welding wire shapes to be formed without interrupting a welding can-making operation, to eliminate an unnecessary amount of welding wire, and It is an object of the present invention to provide a welding machine having a plurality of welding wire forming apparatuses, which can easily make a continuous welding can of a material for a can having excellent welding characteristics.

[0008]

According to the first aspect of the present invention,
In a welding machine having a welding wire forming device capable of forming a welding wire in a plurality of shapes, the welding wire forming device is arranged in a longitudinal direction of the welding wire, each having a different cross-sectional shape, the welding wire, It consists of a plurality of welding wire shape forming rolls comprising upper and lower rolls for pinching, and the upper roll of the welding wire shape forming roll is provided so as to be able to move up and down and can contact or non-contact with the welding wire, and It is characterized in that a plurality of welding wires can be formed by pinching the welding wire by any of the plurality of welding wire shape forming rolls by raising and lowering the roll.

In a resistance welding machine for a can material, a plurality of sets of welding wire shape forming rolls, each of which is composed of two upper and lower rolls, are arranged on the same straight line with respect to the welding wire in the longitudinal direction of the welding wire. Each pair of upper rolls is provided with an elevating mechanism and each pair of upper and lower rolls is provided with a drive function so that it can be moved up and down and driven. Only one set of rolls among a plurality of sets is welded according to different types of welding wire shapes. The present invention solves the above-mentioned problem by making it possible to instantaneously mold by using the pinching force.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram showing a configuration example of a welding wire shape forming roll according to an embodiment of the welding machine of the present invention, and FIG. 2 is a side view. 1 and 2
As shown in FIG. 9, the conventional welding machine shown in FIG. 9 has a welding wire forming device H constituted by a set of welding wire shape forming rolls. It differs from the prior art in that it is constituted by a plurality of welding wire shape forming rolls. In FIG. 1, parts substantially the same as or corresponding to those in FIG. 9 showing the prior art are denoted by the same reference numerals as in FIG.

Each of the welding wire shape forming rolls constituting the welding wire forming apparatus H is a set of two rolls (3 and 4, 18 and 19,
And 20 and 21). Each of the welding wire shape forming rolls is arranged on the same line as the welding wire 1 in the longitudinal direction of the welding wire 1. Material A for cans
Upper roll (material contact side) 3, welding wire shape upper roll 18 for can material B (material contact side) and welding wire shape upper roll 18 for can material n or C (material contact side) Reference numeral 20 includes lifting mechanisms 22, 23 and 24, respectively, and can be raised and lowered. Welding wire shape forming lower roll for material A for can (electrode wheel contact side) 4, welding wire shape forming lower roll for can material B (electrode wheel contact side) 19, and welding wire shape forming for material n or C for can The lower roll (electrode wheel contact side) 21
A drive mechanism having a synchronization function is provided, and can be rotationally driven in synchronization with the speed of the welding wire 1.

According to the present invention, a plurality of sets of welding wire shape forming rolls (3 and 4, 18 and 19, and 20 and 21) are arranged on the same straight line as the welding wire 1, and each of the rolls has a lifting mechanism 22, By providing 23 and 24, an arbitrary welding wire shape can be selected and formed instantaneously, the production stop time for the wire shape change is unnecessary, and no extra wire is used when changing the wire shape. In addition, it has an excellent effect in that can materials having different welding characteristics can be easily produced by welding.

Next, a description will be given of an embodiment in which a plurality of welding wire forming devices of a welding machine according to the present invention are applied to an 18-liter can welding machine with reference to FIGS. FIG. 3 is a sectional view showing a welding wire shape forming roll for material A for cans according to an embodiment of the present invention, FIG. 4 is a sectional view showing a welding wire shape forming roll for material B for cans, and FIG. FIG. 6 is a sectional view showing a welding wire for can material A, FIG. 7 is a sectional view showing a welding wire for can material B, and FIG. 8 is a sectional view showing a welding wire for can material B. It is sectional drawing which shows a welding wire.

Specifically, when n kinds of can materials A, B, and n having different welding characteristics are to be made by welding, each material requires a wire having a different welding wire shape A, B, or n. An embodiment in such a case will be described.

A method of using a plurality of sets of welding wire shape forming rolls is as follows. First, when the first type of can material A is to be made by welding, the upper roll 3 of the welding wire shape forming roll A shown in FIGS. 1 to 3 is lowered and pressed by the lower roll 4 to form a welding wire 1A having a desired shape. Is molded. At this time, the upper rolls 20 of the forming rolls 18 and n of the welding wire shape forming roll B are raised so as not to come into contact with the welding wire 1. The lower rolls 4, 1 of the welding wire shape forming rolls A, B, n
Nos. 9 and 21 carry out welding cans of the material A for cans by rotating and driving in synchronization with the speed of the welding wire.

Next, when making the second type of can material B by welding, the upper roll 18 of the welding wire-shaped forming roll B shown in FIGS. Is formed. At this time,
The upper rolls 20 of the forming rolls 3 and n of the welding wire shape forming roll A are raised so as not to come into contact with the welding wire 1. The lower rolls 4, 19, and 21 of the welding wire shape forming rolls A, B, and n are rotated and driven in synchronization with the speed of the welding wire to perform the welding can of the material B for the can.

Finally, the n-th can material n is welded in the same manner.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example in which a welding wire forming apparatus of a different shape according to the present invention according to the present invention is applied to an 18-liter can welding machine will be described with reference to FIGS.

Specifically, three types of can materials A, B, and C having different welding characteristics are produced by welding, and each material has a different welding wire shape A, B, and C shown in FIGS. An application example in the case where the wire is required will be described.

The method of using a plurality of sets of welding wire shape forming rolls is as follows. First, when the first type of can material A is made by welding, the roll 3 on the welding wire shape forming roll A in FIGS. 1 to 3 is lowered to form a welding wire 1A having a desired shape (see FIG. 6). I do. At this time, the upper rolls 18, 20 of the welding wire shape forming rolls B, C
Is raised so that it does not come into contact with the welding wire 1. The lower rolls 4, 19, and 21 are rotated and driven in synchronization with the speed of the welding wire to perform the welding can of the material A for the can.

Next, when making the second type of can material B by welding, the upper roll 18 on the welding wire forming roll B is used.
And lower the welding wire 1B of the desired shape (see FIG. 7).
Is molded. At this time, the welding wire shape forming roll A,
C upper rolls 3 and 20 are raised and welding wire 1
Avoid contact with. Each lower roll 4, 19,
Numeral 21 drives in rotation in synchronization with the speed of the welding wire to perform welding can making of the material B for can (see FIGS. 1, 2 and 4).

Finally, when the third type of can material C is to be made by welding, the upper roll 2 on the welding wire forming roll C is used.
0 is lowered to form a welding wire 1C having a desired shape (see FIG. 8). At this time, the welding wire forming roll A,
The upper rolls 3 and 18 of B are raised so as not to contact the welding wire. Each lower roll 4, 19, 2
Numeral 1 rotates and drives in synchronization with the speed of the welding wire to perform welding can making of the can material C (see FIGS. 1, 2 and 5).

The forming rolls 3, 18, 20
Can be set so that the shape of the welding wire immediately after the completion of the final can welding of the second material is changed to the shape of the welding wire for the third material in order to eliminate the use of an extra welding wire. As an example of the set time, when the final can welding completion time t1 of the second type of material, the distance L1 between the lower electrode wheel 9 and the wire forming roll 18, and the welding wire speed Vw, the descending of the third type of welding wire forming roll 20 is performed. At time t2, by setting t2 = t1-L1 / Vw, it is possible to perform optimum welding without using an extra welding wire in a continuous dissimilar material can.

Each of the forming rolls 3, 4, 18, 19,
By sharing the drive units 20 and 21, it is possible to minimize the synchronization function and drive mechanism, etc.
Further, the installation space and the installation cost can be minimized.

[0025]

As described above, according to the present invention, in a resistance welding machine for a can material, a plurality of welding wire forming devices are constituted by a plurality of welding wire shape forming rolls. The shape forming rolls are arranged on the same straight line along the longitudinal direction of the welding wire, and the upper roll of each welding wire shape forming roll is configured to be able to move up and down. A reduction in the productivity of the can is prevented, the use of extra welding wire can be eliminated, and the time and labor required for changing the shape of the welding wire, which has been a major problem in the past, can be greatly reduced. By being able to prevent a decrease in productivity due to a change in the shape of the welding wire, it is possible to industrially produce can materials with different welding characteristics. And, industrially useful effect is brought about.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a configuration example of a welding wire shape forming roll according to an embodiment of the present invention.

FIG. 2 is a side view showing a configuration example of a welding wire shape forming roll according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a welding wire shape forming roll for a material A for a can according to an embodiment of the present invention.

FIG. 4 is a sectional view showing a welding wire shape forming roll for can material B according to an embodiment of the present invention.

FIG. 5 is a sectional view showing a welding wire shape forming roll for material C for a can according to an embodiment of the present invention.

FIG. 6 is a sectional view showing a welding wire for a material A for a can.

FIG. 7 is a sectional view showing a welding wire for a material B for a can.

FIG. 8 is a sectional view showing a welding wire for a material C for a can.

FIG. 9 is an overall configuration diagram showing a configuration of a welding wire supply system of a conventional material welding machine for cans.

FIG. 10 is a side view showing a conventional welding wire shape forming roll.

11 is a sectional view showing the structure of the welding wire in FIG.

FIG. 12 is a cross-sectional view showing a structure of a welding wire shape forming roll in FIG.

[Explanation of symbols]

H Welding wire forming device A Welding wire shape forming roll for can material A A B Welding wire shape forming roll for can material B C Welding wire shape forming roll for can n or C 1 Welding wire 1A Welding for can A material A Wire 1B Welding wire for can material B B 1C Welding wire for cann n or C 2 Tensioning roll 3 Welding wire shape forming for can A material upper roll (material contact side) 4 Welding wire shape forming for can A material A Lower roll (electrode wheel contact side) 5 Wire reversing device 6 Support roll 7 Support roll 8 Wire reversing device 9 Lower electrode wheel 10 Support roll 11 Support roll 12 Cleaning roll 13 Wire reversing device 14 Upper electrode wheel 15 Support roll 16 Wire cutting device 17 A portion of the welding wire that comes into contact with the can material 18 A welding wire for the can material B Upper roll of ear shape forming (material contact side) 19 Lower roll of weld wire shape forming for material B for can (electrode wheel contact side) 20 Upper roll of welding wire shape forming for material n or C (material contact side) 21 for can Lower roll for forming the welding wire shape for material n or C (contact side of electrode wheel) 22 Upper roll for forming the welding wire shape for material A for can (material contact side) 23 Upper roll for forming the welding wire shape for material B for can (material Contact side) elevating mechanism 24 Material n for cans or welding wire shape upper roll for C (material contact side) Elevating mechanism 25 Material to be welded

Continuation of the front page (72) Inventor Saburo Oshima 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Naoyuki 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Toyofumi Watanabe 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Mikiyuki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-62-38777 (JP, A) JP-A-2-32394 (JP, U) JP-B-54-4686 (JP, B2) JP-B-50-67253 (JP, B2) U.S. Pat. (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23K 11/08 B21H 8/00 B23K 11/06 B23K 35/40

Claims (1)

(57) [Claims] 1. A welding machine having a welding wire forming device capable of forming a welding wire into a plurality of shapes, wherein the welding wire forming device has different cross-sectional shapes arranged in a longitudinal direction of the welding wire. Comprising upper and lower rolls for clamping the welding wire,
The welding wire shape forming roll comprises a plurality of welding wire shape forming rolls, the upper roll of the welding wire shape forming roll is provided so as to be able to elevate and can be in contact or non-contact with the welding wire, and by elevating the upper roll, the plurality of welding wires A welding machine having a plurality of welding wire forming apparatuses, wherein a plurality of welding wires can be formed by pinching the welding wire by any of the shape forming rolls.