KR20200126148A - Welding apparatus for the manufacture of cylindrical containers - Google Patents

Abstract

The present invention relates to a welding apparatus for manufacturing a cylindrical container, the welding apparatus comprising: a table part in which a linear welding-lane is formed to have open upper and lower sides to allow a welding arc to pass therethrough, and both edges of a metal plate pre-processed to have a curvature through a bending process are provided to be able to come into contact with each other in the welding-lane to be fixed; and a welding part which is disposed on an upper part of the table part to be able to perform a linear transfer motion and allows the welding arc to pass through the welding-lane to continuously join both edges of the metal plate fixed to the table part. The present invention can improve the quality of welding and minimize a disuse loss due to a failure.

Description

Welding device for manufacturing cylindrical containers {WELDING APPARATUS FOR THE MANUFACTURE OF CYLINDRICAL CONTAINERS}

The present invention relates to a welding method of a cylindrical container and a welding device used therein. In manufacturing a cylindrical container, the joint part of the base material to be butted is stably and tightly fixed by a dedicated jig, so that the temporary welding process is omitted. The welding device for manufacturing a cylindrical container that can improve welding quality and minimize waste loss due to defects by performing automatic welding that can prevent over-welding or melting of the base metal through the transfer control of the welding machine. will be.

In the case of a cylindrical container made of a thin plate of metal, the scope of use and use is one of the most common materials, and is applied to various products that can be encountered in everyday life, including parts of various mechanical devices.

In particular, the cylindrical container made of a thin stainless steel plate is easy to maintain hygienic and clean due to the nature of the material, and is therefore used not only for the body of electronic products such as vacuum cleaners, but also for various household items such as trash cans.

Such a cylindrical container is generally manufactured through processes such as bending, welding, spinning, and the like, among which the welding process is generally performed manually due to low productivity and geometric characteristics of the cylindrical container.

As a result, workers frequently complained of eye and skin irritation, nausea, headache, dizziness, fever due to exposure to harmful rays and contaminants generated during welding, and may cause industrial accidents such as lung cancer. I needed a plan.

Recently, automation and semi-automation of the welding process has been actively promoted for the aforementioned problems, labor cost reduction, and product quality improvement.However, in Korea, most of the cylindrical containers are still manufactured by hand, so the productivity and quality of the products It is greatly influenced by skill level.

In particular, it is very difficult to bend and weld a thin plate, so a welding technician with a high level of welding technology had to perform the welding.

In the case of the existing welding process, in order to prevent bending or distortion of the base material that may occur during welding, temporary welding 12 to the butt joint of the metal plate 10, which is the bent base material, as shown in Fig. 1(a). , tack welding) is performed first, and then the main welding operation is performed along the welding line 14 as shown in FIG. 1(b).

In addition, it is very difficult to weld a thin plate with a thickness of 0.8mm to 1.5mm or less at the start and end points of the welding line.If the output or welding time of the welding machine is adjusted incorrectly, the joint is not strong or the base metal melts. Folding may occur.

In order to solve this problem, in the field, as shown in FIG. 2, the overlay plate 20 is temporarily joined to both ends of the metal plate 10, which is a base material, and the start point 14s and the end point 14e of the welding line 14 on both overlay plates 20 By forming, it secures a margin to control the output of the welding machine and prevents melting of the base material.

However, the above series of processes are for improving the welding quality, while they are factors that hinder the finish quality of the welding, and most of the welding processes are performed manually because a subsequent process such as a grinding process is required after completing the main welding. It was one of the important factors that significantly reduced productivity in the actual field.

In addition, as welding technicians with excellent welding skills are becoming increasingly scarce in recent years, there is a need for a method to reduce production time and cost by solving the above problems in process lines requiring mass production.

The problem to be solved by the present invention is that in manufacturing a cylindrical container, since the butt joint part of the base material is stably tightly fixed by a dedicated jig, the temporary welding process can be omitted, and the base material is controlled by the transfer control of the welding machine. It is to provide a welding device for the manufacture of a cylindrical container that can improve welding quality and minimize waste loss due to defects by performing automatic welding that can prevent over-welding or melting.

Meanwhile, the technical problem to be solved by the present invention is not limited to the above-described technical problem, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

In the welding apparatus for manufacturing a cylindrical container according to the present invention for solving the above technical problem, a linear welding-lane with open top and bottom is formed so that a welding arc can pass, and a bending process A table portion provided so that both corners of the metal plate pre-processed to have a curvature through the welding lane are fixed to each other in contact with each other; And a welding part disposed above the table part to enable a linear transfer movement along the welding lane, and continuously joining both edges of the metal plate fixed to the table part by passing a welding arc through the welding lane. It may include.

Here, the table unit may include: a fixture disposed on the same line with respect to the welding lane and provided at a predetermined interval on a lower surface of the table unit; And a welding slit that is provided on a lower surface of the table portion so as to be positioned between the welding lane and the fixing table, and is provided to cover left and right portions based on the width direction of the welding lane, and is a gap narrower than the width of the welding lane ( welding-slit) is formed between the welding lane and the fixing table, and the fixing shield is placed on the fixing table so that both corners of the metal plate contact each other, and both corners of the metal plate are placed on the fixing table. Can be pressed and fixed.

In this case, the fixed shield may include a plurality of first fixed shields provided on a lower surface of the table portion to cover a left portion of the welding lane in a width direction, and arranged in a line along a left length direction of the welding lane; And the welding lane provided on a lower surface of the table portion to cover a right portion of the welding lane in the width direction of the welding lane, and at an interval opposite to the first fixed shield so that the welding slit may be formed on the welding lane. It may include a plurality of second fixed shields arranged in a row along the right length direction of.

And, in the fixed shield, if any one of the corners of both sides of the metal plate is placed on the fixing table, the fixed shield of either the first fixed shield or the second fixed shield preferentially fixes one edge of the metal plate. And, when the other edge of the metal plate comes into contact with one edge of the metal plate that is first fixed, the other fixed shield remaining among the first fixed shield or the second fixed shield sequentially touches the other edge of the metal plate. Fixed, the first fixed shield and the second fixed shield, corresponding to the length of the metal plate, a plurality of them collectively press and fix the edges of the metal plate, or only a portion of the plurality of pieces press and fix the edges of the metal plate It can be prepared to do.

Meanwhile, a plurality of the fixing rods are arranged at intervals from each other along the longitudinal direction of the fixing rod, and may be accommodated in the fixing rod and then protrude out of the fixing rod when necessary and protrude through the gaps of the welding slit. It may include a provided centering pin.

In addition, the welding part may include a guide rail provided on the table part to have the same longitudinal direction as the table part; A welding machine that is provided to be reciprocated on the guide rail through a motor and a belt, and performs welding on the metal plate fixed to the welding lane; And a limit sensor that is provided on the guide rail so as to be able to adjust the position, and sets a transfer distance of the welding machine and a reciprocating point for returning to the initial position.

In addition, the welding machine, when starting the transfer for welding, a pre-set with a preliminary current corresponding to about 10% to 20% of the main current performing the original welding in the start section of the welding line where both edges of the metal plate are in contact. After the welding is performed by maintaining a stopped state for a first time, when the first time elapses, the output is immediately raised to the main current and the transfer starts at the same time. In the end section of the welding line where welding is completed, the main current By reducing the output of about 10% to 20%, it is possible to finish the welding while maintaining the stationary state for a preset second time.

Further, the welding machine, when the thickness of the metal plate is 0.6mm, the output of the main current is 35A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, the arc length is 2.4 It is controlled by mm, and when the thickness of the metal plate is 0.8mm, the output of the main current is 50A to 55A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, and the arc length is It can be controlled by 2.4mm.

The welding apparatus for manufacturing a cylindrical container according to the present invention having the above configuration has the following effects.

First, since the butt joint part of the base material is stably tightly fixed by the exclusive jig, the temporary welding process can be omitted.

In addition, it is possible to prevent over-welding or melting of the base material through the transfer control of the welding machine, and because it is easy to set the transfer distance and reciprocation control of the welding machine, the productivity of mass production can be greatly improved.

Furthermore, by controlling the welding conditions variously according to the thickness of the base material, defects can be minimized and higher welding quality can be obtained.

Meanwhile, the effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those of ordinary skill in the art from the description of the claims.

1 to 2 show the welding methods of a cylindrical container that is carried out in the conventional production site.
3 to 4 show a welding device for manufacturing a cylindrical container according to an embodiment of the present invention.
5 shows a state in which the metal plate base material is fixed to the table part.
6 shows a configuration of a fixed shield according to an embodiment of the present invention.
7 to 8 show a process of fixing a metal plate using a fixed shield and a fixing table.
9 to 11 show a process of fixing a metal plate using a centering pin.
12 shows a supporter that may be additionally configured on a base according to an embodiment of the present invention.
13 shows the transfer and output control of the welding machine according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention in which the object of the present invention may be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same names and the same reference numerals are used for the same components, and additional descriptions thereof will be omitted.

In addition, in describing the present embodiment, the configuration shown in the drawings is only an example to aid understanding of the detailed description, and thus it is specified that the scope of the rights is not limited.

First, a configuration of a welding apparatus for manufacturing a cylindrical container according to the present embodiment will be described with reference to FIGS. 3 to 5.

3 to 4, the present invention is a welding apparatus for manufacturing a cylindrical container by performing automatic welding on a thin plate-shaped metal plate, and the welding apparatus for manufacturing a cylinder according to the present embodiment is a table part 100 And it may be configured to include a welding portion 200.

The table part 100 is a structure in which a metal plate 10, which is a welding target and a base material, is fixed for welding, and is installed on the base part 300, which is the basis of the welding device, and its top and bottom are opened so that the welding arc can pass. A linear welding-lane (wl) may be formed.

A metal plate 10 pre-processed to have a curvature through a bending process may be fixed to the table portion 100, and both edges of the metal plate 10 to be a joint of a cylindrical container during welding are It can be fixed in contact.

Here, the welding lane (wl) is a kind of guideline for the welding line to be welded, and the welding machine 210 of the welding part 200 to be described later moves along the welding lane wl set in the table part 100 and automatically welds Will perform.

At this time, the base metal plate 10 is fixed to be in contact with the lower side of the welding lane wl, that is, the lower surface of the table 100, as shown in FIG. 4, and the welding arc generated on the upper side of the welding lane wl is Passing through the welding lane wl, both edges of the metal plate 10 come into contact with the abutting joint.

On the other hand, the welding lane (wl) may form a type of furrow recessed down on the table portion (100), and the table portion (100) also corresponds to this, so that the vertical section is centered on the welding lane (wl). It can be configured in one V-shape.

Accordingly, shielding of the inner gas to the welding line portion and the molten pool can be made more effectively, and an improvement in welding quality can be expected through a shape structure that facilitates creating an inert atmosphere.

In addition, the table unit 100 according to the present embodiment may be configured to include a fixing table 110 and a fixing shield 120 as a detailed configuration for stably fixing the metal plate 10.

The fixing table 110 is disposed on the same line with respect to the welding lane wl, but is provided on the lower surface of the table 100 at a predetermined interval, and the metal plate 10 as a base material together with the fixing shield 120 to be described later It serves to stably fix both corner portions to be the joint of the table portion (100).

At this time, the gap between the fixing table 110 and the lower surface of the table part 100 is a gap that allows the base metal plate 10 to enter, and the base metal plate 10 is 0.8mm to 1.5mm, even within 0.6mm. Considering that it is a thin plate, it can be set as a narrow gap, and this is a part that can be changed as much as necessary.

In addition, the fixing table 110 is configured in a circular or elliptical bar shape with a vertical cross section corresponding to the shape of the bent metal plate 10 so that the bent metal plate 10 can be fixed through pre-processing. As described above, stable fixing may be possible in correspondence with various diameters and radius of curvature of the base metal plate 10.

Further, in the case of the fixing table 110, a reinforcing cover 112 in the form of a reinforcement plate may be provided at a portion in which the metal plate 10 is fixed by being in contact with the welding lane wl.

The reinforcing cover 112 may also be formed such that a partial area in contact with the metal plate 10 has a curvature so that the metal plate 10 as a base material is stably seated.

In addition, the reinforcing cover 112 not only prevents the fixture 110 from being worn or damaged by thermal deformation due to continuous welding work, but also is configured as a detachable type and can be replaced in response to damage or various shapes of the base material. Can be prepared.

The fixed shield 120 is provided on the lower surface of the table unit 100 to be positioned between the welding lane wl and the fixing table 110, and covers the left and right portions based on the width direction of the welding lane wl. Provided, a welding-slit (ws), which is a gap narrower than the width of the welding lane wl, may be formed between the welding lane wl and the fixing table 110.

In addition, when the fixed shield 120 is placed on the fixing table 110 so that both sides of the metal plate 10 to be a joint contact with each other, the edge of the metal plate 10 is pressed against the fixing table 110 and fixed by pressing.

At this time, the fixed shield 120 is movable by pressing the metal plate 10, although not shown in the drawing, it may be configured to be operated by a switch or a pedal installed in the base unit 300.

In addition, the fixed shield 120 is connected to the table portion 100 by an elastic member 122 such as a spring, so that when the pressure on the metal plate 10 is released, the metal plate 10 is elastically restored by the elastic member 122. ) Can be provided to release the lock and automatically return to the original position.

In addition, the fixed shield 120 according to the present embodiment not only serves to fix the metal plate 10 as the base material to the table unit 100 together with the fixing table 110, but also is formed on the welding lane wl. It is also possible to form a welding slit (ws) that provides guidelines for fine welding lines.

In this way, the welding slit (ws) formed by the fixed shield 120 prevents the arc generated from the welding machine (210, see FIG. 3) from radiating to a range outside the set welding line, so that the base material outside the welding line to be welded is It plays a role in preventing damage and consequently improving welding quality.

In the case of the fixed shield 120 as described above, it may be divided into a first fixed shield 120a and a second fixed shield 120b, and a first fixed shield 120a and a second fixed shield 120b disposed to face each other. The welding slit (ws) may be formed by.

More specifically, the first fixed shield 120a is provided on the lower surface of the table unit 100 to cover a part of the left side based on the width direction of the welding lane wl, and is composed of a plurality of the left side of the welding lane wl. It can be arranged in a line along the length direction. (See Fig. 6)

And the second fixed shield (120b) is provided on the lower surface of the table portion 100 so as to cover a part of the right side based on the width direction of the welding lane (wl), a welding slit (ws) is formed on the welding lane (wl) It is arranged in a line along the right length direction of the welding lane wl at intervals facing the first fixed shield 120a so that it may be configured as a plurality of the first fixed shields 120a.

When the first fixed shield 120a and the second fixed shield 120b as described above are fixed through the metal plate 10 as a base material, the two sides of the metal plate 10 to form a joint are fixed. It performs a role, and although not shown in the drawing, by providing a pedal that can independently and sequentially control each operation in the base unit 300, the operator performs an easier and more stable operation in fixing the metal plate 10 Can be configured to

In addition, as shown in FIG. 5, the table unit 100 according to the present embodiment may further include a working lever 130 for preventing separation of the metal plate 10 when the metal plate as a base material is fixed for a more stable operation. have.

The working lever 130 is a direction in which the metal plate 10 is inserted between the table unit 100 and the fixing table 110 for fixing and may be disposed at a side end along the length direction of the table unit 100.

These working levers 130 are hinged to the table part 100 to maintain a closed state across the fixture 110 in the welding process of the metal plate 10, and if necessary, release the closed state through a hinge movement. It may be provided to perform an operation according to need, such as removing the cylindrical container on which the welding operation has been completed from the table portion 100.

The welding part 200 is disposed above the table part 100 described above to enable a linear transfer motion along the welding lane wl, and the welding arc is passed through the welding lane wl to pass the table part 100 ), a cylindrical container is manufactured by continuously bonding both edges of the metal plate 10 fixed thereto.

In the case of the welding part 200 according to the present embodiment, it may be configured to include a welding machine 210, a guide rail 220, and a limit sensor 270.

The welding machine 210 is a configuration for performing arc welding on the metal plate 10 fixed to the welding lane wl of the table portion 100, and the upper portion of the table portion 100 so as to have the same longitudinal direction as the table portion 100 It may be provided to enable reciprocating transport along the guide rail 220 provided in.

At this time, the transfer of the welding machine 210 is connected between the motor 240 and the sprocket 240 disposed at both ends along the length direction of the guide rail 220, and the motor 240 and the sprocket 240 to the motor 240 It can be achieved by the belt 250 converting the rotational motion of the linear motion, and the welding machine 210 is fixed to the holder carried by the belt 250 to perform a linear transfer motion.

Further, the welding part 200 may additionally include a cable tray 260 as a configuration for guiding and protecting various cables that move together when the welding machine 210 is transferred.

In the case of the limit sensor 270, a position can be adjusted on the guide rail 220, and a transfer distance of the welding machine 210 and a reciprocating point for returning to the initial position can be set.

To this end, the limit sensor 270 may be composed of a plurality of two or more so as to set a starting point and an ending point (return point for reciprocating to the initial position after welding ends) of the welding machine 210.

This limit sensor 270 may be configured as a proximity sensor capable of detecting the position of the welder 210 that is transferred along the guide rail 220, and the welder 210 is brought into proximity or contact with the limit sensor 270. If so, it is possible to exercise control power such as stopping and switching the transfer of the welding machine 210.

In addition, the limit sensor 270 may be used as a means of controlling the operation and output of the welding machine 210 in addition to controlling the transfer distance of the welding machine 210.

For example, the limit sensor 270 may control the output of the welding machine 210 at the beginning of welding, or control to automatically stop the operation of the welding machine 210 when the welding machine 210 reaches an end point of a set welding line.

As such, the welding part 200 according to the present embodiment can be very advantageous for repetitive work and mass production because it is easy to set the transfer distance and reciprocation control of the welding machine 210 through the limit sensor 270.

Next, a process of fixing the metal plate 10 using a welding device for manufacturing a cylindrical container according to an embodiment of the present invention will be described with reference to FIGS. 6 to 11.

As shown in Figure 6, the table portion 100 according to the present embodiment can fix the metal plate 10 as the base material using the fixing table 110 and the fixed shield 120, and the configuration of the present invention is described above. As mentioned above, the fixed shield 120 includes a first fixed shield 120a and a second fixed shield 120b each composed of a plurality of metal plates 10 to enable more stable and sequential fixation.

As shown in FIG. 7, when any one edge e1 of the two sides of the metal plate 10 is placed on the fixing table 110, the fixed shield 120 is a first fixed shield 120a or a second fixed shield 120b. ) Of any one of the fixed shields 120 may preferentially fix one edge (e1) of the metal plate.

And as shown in Go 8, in a state in which one edge e1 of the metal plate 10 is fixed, one edge e1 of the metal plate 10 to which the other edge e2 of the metal plate 10 is fixed first When in contact with the first fixed shield 120a or the second fixed shield 120b, the remaining fixed shield 120 may sequentially fix the other edge e2 of the metal plate 10.

At this time, a plurality of the first fixed shield 120a and the second fixed shield 120b collectively press and fix the edges of the metal plate 10 according to the length of the metal plate 10, or only part of the plurality of metal plates ( 10) can be fixed by pressing the corners.

When the above series of fixing processes are completed, the welding machine 210 of the welding part 200 moves along the welding lane wl and the welding slit ws, and joins both edges of the metal plate 10 in contact with each other to make a cylindrical shape. It forms the seam of the container.

On the other hand, the fixing table 110 according to the present embodiment prevents bending or twisting in the process of fixing both edges of the metal plate 10, and a centering pin 114 (see FIG. 6) as a configuration for forming a more accurate joint. It may contain more.

A plurality of centering pins 114 are arranged at intervals from each other along the longitudinal direction of the fixture 110, are accommodated in the fixture 110, and then protrude to the outside of the fixture 110 when necessary and a welding slit (ws ) May be provided to protrude through the gaps.

More specifically, as shown in Figure 9, when preferentially fixing any one side edge (e1) of both sides of the metal plate 10 on the fixing table 110, the operator is one side edge (e1) of the metal plate 10 The metal plate 10 by moving the first fixed shield 120a located at one edge e1 of the metal plate 10 in a state that pushed in until it contacts the centering pin 114 protruding in the welding slit ws. ) Of one side edge (e1) can be fixed.

At this time, one edge (e1) of the metal plate 10 fixed in the welding slit (ws) is aligned with the center line of the welding slit (ws) without any special adjustment by the centering pin 114 that is pre-aligned with the welding slit (ws). Can be fixed.

And, as shown in FIG. 10, the centering pin 114 descends and can be accommodated in the fixing table 110 while the one edge e1 of the metal plate 10 is fixed by the first fixed shield 120a. have.

Here, the operator pushes the other side edge (e2) of the metal plate 10 between the second fixed shield (120b) and the fixture 110, but the other side edge (e2) of the metal plate 10 is fixed first (e1) By pushing in until it completely abuts against and stops, the both sides e1 and e2 of the metal plate 10 may be aligned with each other in the welding slit ws.

When the above process is completed, as shown in FIG. 11, the operator can even fix the other side edge e2 of the metal plate 10 by actuating the second fixed shield 120b.

Through the above-described series of processes, the operator can simply fix both sides of the metal plate 10 to form the joint of the cylindrical container in an aligned state without separate alignment or alignment, and the metal plate 10 is butted. By stably attaching and fixing the joint part, an additional process such as a temporary welding process is not required.

Next, with reference to FIG. 12, a description will be made of an auxiliary configuration that can be added for stable fixing of the metal plate 10 as a base material to the welding apparatus for manufacturing a cylindrical container according to the present embodiment.

As shown in FIG. 12, a supporter 310 may be additionally configured in the base unit 300 according to the present embodiment.

The supporter 310 may be composed of a pedestal 312 and a pillar 314, and the pedestal 312 is provided to support the lower portion of the metal plate 10 fixed to the table portion 100, but a metal plate subjected to a bending process It may be configured in the form of an arc having a curvature corresponding to the shape of (10), and the support stand 314 may be configured to be variable in height according to various sizes of the metal plate 10 as the base material. .

Through such a supporter 310, the operator can more stably fix the metal plate 10 when sequentially fixing both edges of the metal plate 10 to the table 100, as well as the metal plate due to an unexpected mistake. It is possible to prevent (10) from falling from the table portion (100).

Next, a welding process of the metal plate 10 using a welding device for manufacturing a cylindrical container according to an embodiment of the present invention will be described with reference to FIG. 13.

As shown in FIG. 13, the welding part 200 according to the present embodiment may perform unique transfer control and output control when welding the metal plate 10 fixed to the table part 100.

More specifically, when the welding machine 210 of the welding part 200 starts transferring for welding, about 10% to about 10% of the main current performing the original welding in the starting section of the welding line where both edges of the metal plate 10 abut. Welding can be performed by maintaining a stopped state for a predetermined first time period with a preliminary current corresponding to 20%.

Here, the main current is 50A to 55A, and the first time is about 3 seconds as a basic setting condition, which is not a limitation, but is an example of the set value according to the case where the thickness of the metal plate 10 is 0.8mm. The setting conditions for 1 hour are items that can be changed in various ways depending on the thickness of the metal plate 10.

And when the first time elapses, the output is immediately raised to the main current and the welding machine 210 starts to be transferred at the same time. At this time, the section in which the output from the preliminary current to the main current is increased is rapidly switched to close to the vertical, thereby generating a slope. It is possible to form a non-slope section.

In the end section of the welding line where welding is completed and the section where the transfer of the welding machine 210 ends, the output of the welding machine 210, which is the output state of the main current, is reduced by about 10% to 20%, and the second time (the thickness of the metal plate is In the case of 0.8mm, the welding can be finished by maintaining the stationary state for about 1~2 seconds).

Through a series of welding controls as described above, the welding part 200 can improve the welding quality for the beginning and end of the welding line, which is difficult to weld, without a separate temporary welding process and an overplate process (see Fig. 2), and over-welding or melting of the base material. It can also be prevented.

In addition, the welding part 200 according to the present embodiment may control the welding conditions of the welding machine 210 to perform optimal welding according to the thickness of the base metal plate 10.

For example, when the thickness of the metal plate 10 is 0.6mm, the main current output of the welding machine 210 is 35A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, and the arc length (metal plate The distance between the and electrodes) can be controlled to 2.4mm.

In addition, when the thickness of the metal plate 10 is 0.8mm, the main current output of the welding machine 210 is 50A to 55A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, the arc length Can be controlled by 2.4mm.

The welding condition of the welding machine 210 is an optimum condition obtained through repeated tests to obtain excellent welding quality, thereby forming a stable bead and preventing a poor penetration phenomenon.

Further, in setting the welding conditions as described above, condition control through the diameter of the nozzle of the welding machine 210 may be performed.

For example, a ceramic nozzle is used, but the distance (arc length) between the electrode and the base material can be controlled according to the nozzle diameter, and the shielding of the inner gas is made more efficient by keeping the distance between the electrode and the base material less than the diameter of the nozzle. You can also let it go.

As described above, the welding part 200 according to the present embodiment can minimize defects and secure higher welding quality by variously controlling welding conditions according to the thickness of the base material.

As described above, one embodiment according to the present invention has been looked at, and the fact that the present invention can be embodied in other specific forms without departing from its spirit or scope other than the above-described embodiments is known to those skilled in the art. This is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description and may be modified within the scope of the appended claims and equivalents thereof.

10: metal plate
100: table part
110: fixture
114: centering pin
120: fixed shield
200: weld
210: welder
220: guide rail
270: limit sensor
300: base portion

Claims (8)

A linear welding-lane with open top and bottom is formed so that the welding arc can pass, and both edges of the pre-processed metal plate to have a curvature through a bending process abut and fix each other in the welding lane. A table portion provided to be able to be; And
A welding part disposed on the table part to enable a linear transfer motion along the welding lane, and continuously joining both edges of the metal plate fixed to the table part by passing a welding arc through the welding lane Included
Welding device for manufacturing cylindrical containers.
The method of claim 1,
The table part,
A fixing table disposed on the same line with respect to the welding lane and provided on a lower surface of the table at a predetermined interval; And
A welding slit that is provided on a lower surface of the table portion so as to be positioned between the welding lane and the fixing table, and provided to cover left and right portions based on the width direction of the welding lane, and is a gap narrower than the width of the welding lane. -slit) comprises a fixed shield formed between the welding lane and the fixing table,
The fixed shield,
When both corners of the metal plate are placed on the fixing table so as to contact each other, pressing and fixing both edges of the metal plate against the fixing table
Welding device for manufacturing cylindrical containers.
The method of claim 2,
The fixed shield,
A plurality of first fixed shields provided on a lower surface of the table portion to cover a left portion of the welding lane in a width direction of the welding lane, and arranged in a row along a left length direction of the welding lane; And
It is provided on the lower surface of the table part so as to cover a right part of the welding lane based on the width direction of the welding lane, and the welding lane is spaced apart from the first fixed shield so that the welding slit may be formed on the welding lane. Including a plurality of second fixed shields arranged in a row along the right longitudinal direction
Welding device for manufacturing cylindrical containers.
The method of claim 3,
The fixed shield,
When any one of the corners of the metal plate is placed on the fixing table, the fixed shield of either the first fixed shield or the second fixed shield preferentially fixes one edge of the metal plate,
When the other edge of the metal plate comes into contact with one edge of the metal plate that is first fixed, the other fixed shield remaining among the first fixed shield or the second fixed shield sequentially fixes the other edge of the metal plate, and ,
The first fixed shield and the second fixed shield,
In correspondence with the length of the metal plate, a plurality of pieces are provided to collectively press and fix the edges of the metal plate, or only a portion of the plurality of pieces may be provided to press and fix the edges of the metal plate.
Welding device for manufacturing cylindrical containers.
The method of claim 4,
The fixing bar,
A plurality of centering pins are arranged at intervals from each other along the longitudinal direction of the fixture, are accommodated in the fixture, and then protrude to the outside of the fixture when necessary to protrude through the gap of the welding slit. doing
Welding device for manufacturing cylindrical containers.
The method of claim 1,
The welding part,
A guide rail provided on the table portion so as to have the same longitudinal direction as the table portion;
A welding machine that is provided to be reciprocated on the guide rail through a motor and a belt, and performs welding on the metal plate fixed to the welding lane; And
It is provided on the guide rail so as to be able to adjust the position, including a limit sensor for setting the transfer distance of the welding machine and a reciprocating point for returning to the initial position
Welding device for manufacturing cylindrical containers.
The method of claim 6,
The welding machine,
When the transfer for welding is started, a preliminary current corresponding to about 10% to 20% of the main current performing the original welding in the start section of the welding line where both corners of the metal plate are in contact with each other, and is stopped for a predetermined first time After performing the welding by maintaining,
When the first time elapses, the output is immediately increased with the main current and the transfer starts at the same time,
In the end section of the welding line where welding is completed, the output of the main current is reduced by about 10% to 20% to maintain a stationary state for a preset second time and finish welding.
Welding device for manufacturing cylindrical containers.
The method of claim 7,
The welding machine,
When the thickness of the metal plate is 0.6mm, the output of the main current is 35A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, and the arc length is controlled to 2.4mm,
When the thickness of the metal plate is 0.8mm, the output of the main current is 50A to 55A, the feed rate is 0.2m/min, the flow rate of the inner gas is 15L/min to 20L/min, and the arc length is controlled to 2.4mm.
Welding device for manufacturing cylindrical containers.

Images