JP2554250Y2 - Equipment for reusing wires used in mash seam welding machines - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reusing a wire provided to a mash seam welding machine, and more particularly, to form a cylinder or other shape by overlapping both side edges of a blank sheet such as a metal plate. This overlapped portion is disposed in connection with a mash seam welding machine for performing mash seam welding between upper and lower roller electrodes via a copper wire, and is crushed together with the overlap portion between upper and lower roller electrodes of the mash seam welding machine. A copper wire with a flat cross section that has been used once is automatically and orderly wound on a drum as a winding wire without being discarded as scrap, and the copper wire wound on this drum is regularly The present invention relates to an apparatus for reusing a wire which can be unwound and supplied to a mash seam welding machine under a certain condition. The copper wire includes not only copper but also a copper alloy, and a metal or an alloy having excellent thermal conductivity and a certain degree of rigidity.

[0002]

2. Description of the Related Art Conventionally, as a method of welding a butt portion in which side edges of a blank sheet such as a metal plate or a steel plate are butted or an overlapped overlap portion, one type of seam welding of resistance welding is used. Welding is known, and seam welding is also called seam welding. On the other hand, according to seam welding, a welded part having excellent tightness can be obtained in the overlap portion, so that it is used for welding liquid and other transport pipes, fuel tanks, drums, food cans and the like.

[0003] That is, the most common type of seam welding is a lap seam welding method (Lap Seam W).
an overlapping portion is formed by overlapping side edges of a steel plate or a metal plate, and a lap joint formed of the overlapping portion is connected to a pair of disk-shaped electrodes, that is, between the upper and lower roller electrodes. And pressurize it.
The electrodes are energized and resistance welded. The most common resistance welding method is spot welding, and this spot welding is continuously repeated by upper and lower roller electrodes.
Specifically, at the time of welding, intermittent energization is regularly performed between the upper and lower roller electrodes, so that the overlap portion is partially heated by Joule heat during energization, and furthermore, Are melted, and a so-called nugget is continuously formed and welded. Therefore, in a seam welded joint, an overlap portion formed by laminating steel plates or the like is joined as if sewn by continuous nuggets, and thus the obtained weld portion is airtight and watertight. It is said to have excellent properties.

However, in the conventional seam welding, the width of the contact surface between the upper and lower roller electrodes is smaller than the width of the overlap portion. Unattached parts remain. Therefore, as a treatment, the non-adhered portions on both sides of the welded portion are coated with a synthetic resin. However, the synthetic resin does not easily adhere to the non-adhered portions on both sides, and corrosion may progress from the non-adhered portions. Accidents such as cuts during handling may occur depending on the part.

[0005] One of the welding methods that does not leave the non-adhered portion is a mash seam welding method (Mash Seam W).
elding) has been proposed and implemented.

In this mash seam welding method, the overlap portion is press-fused and welded by upper and lower roller electrodes having a contact surface having a width larger than the width of the overlap portion to be welded. Crush the edge of the overlap to seal
This is the method of welding. This seam welding method is a conventional seam welding method.
Unlike the welding method, the cross section of the weld is obliquely crushed.
A heat-fused nugget is continuously formed in the welded portion. For this reason, the welded portion obtained by mash seam welding is such that the welded surface is uniformly pressed, has high mechanical strength, is excellent in tightness resistance, and is particularly suitable for manufacturing beverage cans, food cans and the like. It is said.

On the other hand, when looking at the materials for beverage cans and food cans, surface-coated steel sheets such as so-called tin-plated steel sheets in which tin or an alloy thereof is coated on the surface of cold-rolled steel sheets are sometimes used due to requirements for corrosion resistance and the like. Many. The blank sheet made of this surface coated steel sheet is overlapped on both side edges to form an overlap portion, and the overlap portion is mash seam-welded by the upper and lower roller electrodes as described above. For example, the surface-coated metal such as tin migrates to the outer peripheral surfaces of the upper and lower roller electrodes, that is, the contact surface side of the overlap portion, and is contaminated. For this reason, methods and apparatuses for removing contaminants such as tin on the outer peripheral surfaces of the upper and lower roller electrodes have been proposed. However, these methods and apparatuses cannot remove contaminants, and from the viewpoint of continuously producing food cans and beverage cans at a high speed, for example, every welding of an overlap portion of a food can or the like,
It is practically impossible to clean the outer peripheral surface of the roller electrode.

From this point of view, as an improvement of the conventional mash seam welding method, as shown in Japanese Patent Publication No. 44-25213, a copper wire is interposed on the outer peripheral surfaces of the upper and lower roller electrodes, and this copper wire is used. A method and an apparatus for mash seam welding a surface-coated steel sheet between upper and lower roller electrodes via an electrode have been proposed. In this method, a copper wire receiving groove is formed on the outer peripheral surfaces of the upper and lower roller electrodes in a circular direction, and the copper wire is stored in the receiving groove, and the copper wire is sent with the rotation of the upper and lower roller electrodes. Then, the copper wire is crushed together with the overlap portion to perform mash seam welding. Furthermore, the width of the contact surface of the copper wire during mash seam welding,
In order to increase the width of the contact surface, the copper wire having a circular cross section taken out of the pile on which the copper wire is unwound is rolled or crushed into a flat cross section before welding to increase the width of the contact surface. ing.

[0009] In addition, during the mash seam welding, the vertical
Since the copper wire is crushed together with the overlap portion by the electrode, it is crushed twice before and during welding, and further, during welding, the coating metal such as tin migrates to the surface of the copper wire and is contaminated. Therefore, the used copper wire is cut by a cutter and discarded as scrap.

[0010] However, copper wire is extremely expensive, and if this expensive copper wire is scrapped by using only once, the welding cost becomes extremely high, and the can-making cost becomes extremely high. Absent.
Even if the discarded copper wire is recovered as scrap, the recovery cost is at most about 1/10 of that of a commercially available copper wire, and this is a problem in the mash seam welding method using the copper wire. It is a fatal defect.

From this point of view, the possibility of reusing copper wires after use has been studied for many years from various viewpoints. However, food and beverage cans to be welded are related to the health of the eater. Therefore, its reuse method and device have not been proposed yet. One of the reasons is that food cans and beverage cans are, for example, 1 million, 100 cans.
This is because even if a large quantity such as 100,000 pieces is put on the market, even one of the large quantity of food cans and beverage cans is not allowed to have welding defects.

Further, the copper wire after use has a flat shape in which the cross-sectional shape is not circular but is crushed due to one-time rolling. It is extremely difficult to wind this flat copper wire, for example, on a drum, that is, to wind it neatly without overlapping without gaps. In addition, the copper wire wound on the drum contains, to varying degrees, irregularly wound parts, that is, places with gaps and locally overlapping parts. Weldability is impaired due to sag and wire tension change due to parts, and a healthy weld cannot be obtained.

[0013]

The object of the present invention is to solve the above-mentioned drawbacks. Specifically, an overlap portion in which both side edges of a blank such as a metal plate are overlapped is sandwiched between upper and lower roller electrodes via a copper wire. Once used in a mash seam welding machine that performs mash seam welding, the copper wire whose shape has changed due to the use of this mash seam welding machine can be neatly wound on a drum, while the copper wire wound on a drum Even if a part of the mash seam welder is included, the mash seam welder is repaired without correcting the irregular winding part and sequentially rewinding the mash seam welder without causing troubles caused by the unwinding of the irregular winding part. The present invention proposes a rewinding and rewinding device for a wire which can supply a rewinding wire constantly at a constant speed and reuse it.

[0014]

Means for Solving the Problems The present invention provides a mash seam welding machine for mash seam welding an overlap portion formed by overlapping both side edges of a blank sheet such as a metal plate between upper and lower roller electrodes via a copper wire. The copper wire, which is disposed in relation to and is once subjected to welding between the upper and lower roller electrodes, is wound on a drum as a winding wire,
In a wire reuse device for supplying a copper wire wound on the drum as a rewind wire to a mash seam welding machine and again performing welding between the upper and lower roller electrodes, a winding wire or a winding wire is provided adjacent to the drum. A wire-directing device is provided that winds or rewinds the return wire in order to the drum, and the wire-directing device includes a detection roller that is in rolling contact with the winding wire or the rewind wire, and the detection roller rotates at one end. A supporting arm that freely supports the detecting means, a detecting means fixed to the other end of the supporting arm, and a detecting sensor for detecting a change in the position of the detecting means; It is characterized by comprising one notch.

The configuration as the means of the present invention and its operation will be described below with reference to the drawings.

FIG. 1 is a front view of a part of a wire reusing apparatus according to one embodiment of the present invention, and FIG. 2 is wound up or rewinded in order by the reusing apparatus shown in FIG. FIG. 3 is an explanatory view showing the state from the front, and FIG. 3 is an explanatory view showing an example of a trouble at the time of winding or rewinding occurring in the reusing device shown in FIG. 1 from the front. FIGS. It is explanatory drawing which shows a part of example of 1 in a cross section.

First, in FIG. 1, a copper wire 1 (hereinafter referred to as a copper wire) to be wound via an introduction roller (not shown) driven at the same peripheral speed as a feed roller for feeding a copper wire by a mash seam welding machine. , Simply referred to as a winding wire 1). The take-up wire 1 is temporarily formed in a mash seam welding machine (not shown), for example, by a forming roller (not shown).
Further, the copper wire having a circular cross section is pressed and crushed between a pair of upper and lower roller electrodes (not shown), and is deformed into, for example, a flat cross section.

The surface properties, for example, the surface roughness and the shape of the introduced winding wire 1 are detected after the introduction, and only those having no detectable shape defects are sent.

Next, the winding wire 1 introduced in this manner is neat on the drum 2, that is, there is no gap between the adjacent winding wires 1 and the winding wires 1 do not overlap.
A wire directing device 6 is provided adjacent to the drum 2 for winding on the drum 2. This wire directing device 6 can be used to wind the winding wire 1 neatly on the drum 2 or, as will be described later, a wire to be unwound (hereinafter, for the sake of explanation, to distinguish it from the winding wire 1, Rewind wire 4
And ) Is a device for orderly rewinding, and a clamp device 5 and, if desired, a guide roller 3 are provided upstream of the wire directing device 6.

That is, the winding 1 of the winding wire introduced from the guide roller has a shape crushed into a flat cross section as described above, and the flat surface of this shape comes into contact with the guide roller. It is introduced and enters the guide roller 3 in this state. Therefore, in this state, the drum 2
When wound up, the flat surface of the winding wire 1 does not contact the surface of the drum 2. In particular, since both side surfaces other than the flat surface of the winding wire 1 form an arc shape, the arc side surface comes into contact with the surface of the drum 1 and the drum 2
The wire 1 comes into point contact with the surface of the winding wire 1, and the winding wire 1 is extremely crooked and cannot be wound in a practical manner. From this point, at the time of winding, the winding wire 1 is converted into the winding direction and the direction of the winding wire 1 so that the flat surface thereof comes into contact with the surface of the drum 2. A clamping device 5 is provided adjacent to 3.
The direction of the winding wire 1 is changed by the clamp device 5, and as described later, when the winding wire 1 wound so that the flat surface comes into contact with the surface of the drum 2 is also rewound, The direction of the rewind wire 4 is changed and sent to the guide roller 3. Further, as described below, for example,
When a trouble as shown in FIG. 3 is detected by the wire directing device 6, the winding wire 1 is
Is stopped, and the winding state on the drum 1 is corrected.

A wire directing device 6 is provided adjacent to the clamp device 5. The wire pointing device 6 is mounted on a lifting block 7 together with the clamp device 5 as shown in FIG. In this case, it is sufficient that the wire directing device 6 and the clamp device 5 can be raised and lowered without necessarily providing the lifting block 7. Further, as the elevating mechanism, a chain, a hydraulic pressure or any other conventional mechanism can be used. As shown in FIG. 1, the lifting mechanism comprises guide rails 71 and 72 and a ball screw 73, and the lifting block 7 is rotated by rotation of the ball screw 73.
It is preferable to configure so as to rise or fall by a unit pitch, that is, a unit distance, along 1, 72.

That is, when the winding wire 1 is wound on the drum 2, the winding direction of the winding wire 1 is a predetermined angle on the surface of the drum 2, preferably,
As shown in FIG. 2, the wire is wound while being kept horizontal. Similarly, when the material is rewound, the rewind wire 4 is kept horizontally and discharged.

More specifically, as shown in FIG. 2, the wire directing device 6 includes a detection roller 61, a support arm 62, a detection unit such as a disk 63 having a cutout 631 in part, and a pair of detection sensors 641. , 642. The detection roller 61 rolls on the winding wire 1 and is rotatably supported by one end of the support arm 62. A disk 63 is integrally connected to the other end of the support arm 62, and a notch 63 is formed in a part of the disk 63.
1 is formed as detecting means. Notch 6
At least two detection sensors 641 and 642 are provided in correspondence with the detection means consisting of
1 and 642, it is possible to detect a change in the position of the detecting means including the notch 631.

For example, when the winding wire 1 is wound on the drum 2 without any gaps and without overlapping, for example, as shown in FIG. 2, the winding wire 1 is in a horizontal or substantially horizontal state. Is wound around the drum 2. As described above, the detection sensors 641 and 62 are arranged such that at least two detection sensors 641 and 642 are located in the cutout portions 631 of the disk 63 when the winding wire 1 is in the regular winding state.
42 are provided.

With this configuration, the winding wire 1
When a gap occurs between the adjacent wires 1 or when a trouble such as overlapping occurs, the trouble can be promptly detected by at least two detection sensors 641 and 642.

That is, when the winding wire 1 is wound on the drum 2, since the winding wire 1 is once subjected to mash seam welding by a welding machine, a fragment of the wire 1 is usually flat. For this reason, at the time of winding, troubles such as when a gap occurs between the adjacent wires 1 or when a part of the winding wire 1 is overlapped often occur, and it is difficult to wind without such troubles. Near impossible. When this trouble occurs, the winding wire 1 is introduced with a certain inclination angle with respect to the surface of the drum 2 as shown in FIG. When the winding wire 1 is introduced at an inclined angle when the drum 2 is wound in this way, since the wire directing device 6 is configured as described above, the detection roller 6
1, the support arm 62 rotates about the other end, and with this rotation, the disk 63 integrally connected to the other end of the support arm 62 also rotates, and the notch 631 also rotates. The position moves and changes. The movement and change of the position of the notch can be promptly detected by at least one of the detection sensors 641, and a trouble at the time of winding can be detected.

When the trouble is detected, the winding wire 1 is configured to be quickly clamped by the clamp device 5, but the clamp device 5 can be configured as shown in FIGS.

As shown in FIGS. 4 and 5, the clamp device 5 is provided with a fixed clamp roller 51 and a movable clamp roller 52 opposed thereto. For example, the winding wire 1 or the rewinding wire 4 is sandwiched between the clamp rollers 51 and 52, and the direction of the winding wire 1 is changed to a state where the winding wire 1 is wound on the drum 2. The movable clamp roller 52 is a fixed clamp roller 5
4 is provided so as to approach or move away from the cylinder 1. In the example shown in FIG. 4, a hydraulic cylinder piston mechanism 531 such as air pressure is provided, and in the example shown in FIG. 5, a spring pressing mechanism 532 is provided. That is, an operating plate 533 is connected to the hydraulic cylinder piston mechanism 531 shown in FIG. 4, and the operating plate 533 is connected to a support member 534 that rotatably supports the movable clamp roller 52. FIG.
The spring pressing mechanism 532 shown in FIG.
Attach to both ends of 2.

When the clamp device 5 is configured as described above,
When a trouble is detected by the wire directing device 6, each moving mechanism, for example, the hydraulic cylinder piston mechanism 5
When the coil 31 is energized, the winding wire 1 sandwiched between the two clamp rollers 51 and 52 is clamped, and the feeding of the winding wire 1 is stopped.

In the above, the winding wire 1
However, the operations of the wire directing device 6, the clamp device 5, and the like are the same in the rewinding wire 4.

[0031]

As described above in detail, according to the present invention, an overlap portion formed by overlapping both side edges of a blank sheet such as a metal plate is mashed between upper and lower roller electrodes via a copper wire. A copper wire, which is disposed or associated with a part of a mash seam welding machine to be welded and is once subjected to welding between the upper and lower roller electrodes, is wound on a drum as a winding wire. A copper wire wound on a drum is supplied to a mash seam welding machine as a rewinding wire, and is used again for welding between upper and lower roller electrodes. A wire directing device which winds or rewinds the winding wire or the rewinding wire in an orderly manner to the drum, and has a detection roller which is in rolling contact with the winding wire or the rewinding wire. The detection Russia - support A detection means for rotatably supporting the other end of the La with one end fixed integrally -
And a detection sensor for detecting a change in the position of the detection means.

Therefore, even a copper wire crushed to have a flat cross section can be wound on the drum while being aligned, and even if there is a part that is overlapped or unaligned during rewinding, it can be wound. It can be modified and supplied to the welding machine smoothly.

Also, regardless of the direction of the cross section of the copper wire, the copper wire can be wound so that its flat surface always contacts the drum surface.

[Brief description of the drawings]

FIG. 1 is a front view of a part of a wire reuse device according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing, from the front, a state in which the reusable device shown in FIG. 1 is neatly wound or unwound.

FIG. 3 is an explanatory diagram showing an example of a trouble at the time of winding or rewinding which occurs in the reuse device shown in FIG. 1 from the front.

FIG. 4 is an explanatory view showing a part of an example of a clamp device in a cross section.

FIG. 5 is an explanatory view showing a part of an example of a clamp device in a cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding wire 2 Drum 3 Guide roller 4 Rewinding wire 5 Clamping device 6 Wire directing device 7 Elevating block

Claims (4)

(57) [Scope of request for utility model registration] 1. A mash seam welding machine for mash seam welding an overlap portion formed by overlapping both side edges of a blank sheet such as a metal plate between upper and lower roller electrodes via a copper wire, and The copper wire once subjected to welding between the upper and lower roller electrodes is wound on a drum as a winding wire, and the copper wire wound on the drum is supplied to the mash seam welding machine as a rewind wire. And a wire re-use device for re-welding between the upper and lower roller electrodes, wherein the winding or rewinding wire is wound or unwound so that the winding wire or the rewinding wire is oriented to the drum in an orderly manner adjacent to the drum. Device, a wire-directing device comprising: a detection roller that is in rolling contact with the winding wire or the unwinding wire; and A support arm rotatably supported at one end, detection means fixed to the other end of the support arm, and a detection sensor for detecting a change in the position of the detection means, wherein the detection means is a part of a disk. An apparatus for reusing a wire for use in a mash seam welding machine, comprising at least one notch formed in the mash seam welding machine. 2. A clamp, adjacent to the wire-directing device, for clamping the winding wire or the unwinding wire when the winding wire or the unwinding wire is not orderly directed to the drum by the wire-directing device. The apparatus for reusing a wire provided to a mash seam welding machine according to claim 1, further comprising an apparatus. 3. The clamp device is provided with at least two clamp rollers for holding the take-up wire or the rewind wire, and one of the clamp rollers holds one clamp roller in a fixed state while the other clamp roller holds the other. 3. The wire reuse device according to claim 2, wherein the clamp roller is configured to be movable so as to be able to approach or separate from the one clamp roller. 4. The mash seam welding machine according to claim 3, wherein said one clamp roller is provided with a fluid pressure pressing device or a spring pressure pressing device for moving said one clamp roller closer to or away from said one clamp roller. Provided wire reuse equipment.