KR100373450B1 - Automatic gas metal arc welding method for butt joint welding and apparatus thereof - Google Patents

Abstract

The present invention relates to a butt joint automatic welding method and apparatus, the purpose of which is to automate the welding of longitudinal steel, improve productivity and work efficiency, improve the safety of the welder, and improve the welding quality To provide a butt joint automatic welding method and apparatus.

The present invention relates to a gas metal arc welding method of a flange butt joint of a longitudinal stiffener; Installing a gas metal arc welding device on a rail unit installed in accordance with the welding line; Setting the installed gas metal arc welding device according to welding conditions; Driving the set gas metal arc welding device along a rail; Recognizing the end of the welding member by the sensor of the gas metal arc welding device; An oscillator is turned on by the controller in accordance with the recognition of the end of the welding member, the carriage is switched to the initial connection, an arc is generated according to the initial welding condition, and the initial welding is performed during the set initial welding condition time; Switching to the carriage base main welding speed by the control unit upon completion of the initial welding and outputting an arc according to the main welding condition; Recognizing the end of the welding member by the sensor unit provided on one side of the carriage; Welding the crater during the set crate welding condition time by switching the speed of the carriage to the crater welding speed by the controller and outputting an arc according to the crate welding condition according to the recognition of the end of the welding member by the sensor unit; The welding arc and the oscillator are turned off by the control unit and the carriage travels at high speed according to the completion of welding of the crater part; Repeating the initial welding, the main welding, and the crater welding by recognizing an end of another welding member in the sensor unit of the high speed traveling carriage; A limit switch provided in front of the carriage body in high speed contacting the dog plate provided in the dog part of the rail part to stop the carriage by the controller; To provide a butt joint automatic welding method and apparatus for automatically performing welding through the step that the limit switch installed behind the stationary carriage body is in contact with the dog plate of the dog portion is stopped after the carriage advances to terminate welding have.

Description

Automatic gas metal arc welding method for butt joint welding and apparatus

The present invention relates to a method and apparatus for automatic welding of butt joints, and to a butt joint automatic welding method and apparatus capable of automatically welding a thick flange portion among a plurality of longitudinal stiffener butt joints when welding butt joints. will be.

Multiple "T" type or "L" type longitudinal stiffeners regularly attached to the hull shell in the longitudinal direction of the hull when joining two heavy hull shell blocks together Is joined at the same place, but the shape and specifications of the longitudinal section steel, and the total welding volume is not large, the automation of the welding operation was not realized.

Conventionally, the semi-automatic welding method in which the welder welds the GMA welding torch while moving the hand along the joint of each side of the "T" type or "L" type longitudinal stiffener increases the fatigue of the welder and takes a long time. As a result, there are various problems such as deterioration of welding productivity and welding quality.

The present invention has been made in consideration of the above problems, the purpose of which is to automate the welding work of longitudinal section steel, improve the productivity and work efficiency, promote the safety of the welder, butt joints that can improve the welding quality It is to provide a secondary automatic welding method and apparatus.

The present invention relates to a gas metal arc welding method of a flange butt joint of a longitudinal stiffener; Installing a gas metal arc welding device on a rail unit installed in accordance with the welding line; Setting the installed gas metal arc welding device according to welding conditions; Driving the set gas metal arc welding device along a rail; Recognizing the end of the welding member by the sensor of the gas metal arc welding device; An oscillator is turned on by the controller in accordance with the recognition of the end of the welding member, the carriage is switched to the initial connection, an arc is generated according to the initial welding condition, and the initial welding is performed during the set initial welding condition time; Switching to the carriage base main welding speed by the control unit upon completion of the initial welding and outputting an arc according to the main welding condition; Recognizing the end of the welding member by the sensor unit provided on one side of the carriage; Welding the crater during the set crate welding condition time by switching the speed of the carriage to the crater welding speed by the controller and outputting an arc according to the crate welding condition according to the recognition of the end of the welding member by the sensor unit; The welding arc and the oscillator are turned off by the control unit and the carriage travels at a high speed according to the completion of welding of the crater unit; Repetitively performing initial welding, main welding, and crater welding by recognizing an end of another welding member in the sensor unit of the high speed traveling carriage; A limit switch provided in front of the carriage body in high speed contacting the dog plate provided in the dog part of the rail part to stop the carriage by the controller; To provide a butt joint automatic welding method and apparatus for automatically performing welding through the step that the limit switch installed behind the stationary carriage body is in contact with the dog plate of the dog portion is stopped after the carriage advances to terminate welding have.

1 is an exemplary view showing the overall configuration of the present invention

Figure 2 is an exemplary view showing a permanent magnet slide unit according to the present invention

3 is an exemplary view showing a control unit according to the present invention.

4 is an exemplary view showing a sensor unit according to the present invention.

5 is an exemplary view showing a dog part according to the present invention.

6 is a flow chart according to the present invention.

Figure 7 is a photographic illustration showing the present invention

* Explanation of symbols for the main parts of the drawings

(10): limit switch portion 20: sensor portion

21: fixing bracket 22: sliding housing

(23): moving shaft (24): fixing handle

25: feed slider 26: feed slide block

27: optical fiber sensor 28: slide tenton volume

(29): casing 30: slide section

31: slide bar 32: slide housing

33: fixed handle 40: dog part

(41): dog body (42): fixed roller

(43): guide roller 44: fixed shaft

45: fixed shaft handle 46: spring

(47): dog plate (48): fixed / transfer handle

(49): fixing bolt (50): control unit

(51): welding current regulator (52): welding voltage regulator

(53): welding speed regulator

(54): Initial welding condition holding time regulator

(55): Crater welding condition holding time regulator

(56): intermittent / combustion switch

(57): Oscillator operating condition regulator

(58): this welding condition regulator

(59): Welding mode selection switch nameplate

(100): gas metal arc welding device (110): rail

(111): rack gear 120: carriage

(130): oscillator section 140: permanent magnet

150: clutch lever 160: welding torch up and down slider

170: welding torch clamp 180: torch left and right slide

(190): welding torch (411): long groove

(441): flange

1 is an exemplary view showing the overall configuration of the present invention, Figure 7 is a photographic illustration showing the present invention, the present invention is a limit switch unit 10 respectively installed on both ends of the carriage body of the gas metal arc welding apparatus ), A sensor unit 20 installed at one side of the carriage body, a slide unit 30 and a dog unit 40 installed at a rail unit to which the carriage is moved, and the sensor unit 20 and a limit switch unit. The control part 50 which controls the gas metal arc welding apparatus 100 by the 10 and the dog part 40 is comprised.

The gas metal arc welding device 100 is to weld the longitudinal stiffener butt joint, the straight rail portion 110 is installed along the welding line on the longitudinal stiffener flange surface, and the welding device 100 along the rail portion 110 A carriage unit 120 for moving the oscillator, an oscillator unit 130 moving by the carriage unit 120 and oscillating a welding torch, a carriage unit 120, an oscillator unit 130, initial welding and bone welding The control part 50 which sets an output condition, and the welding torch part (not shown) which welds a to-be-welded object are comprised.

The limit switch unit 10 is installed at the most protruding portions of the front and rear of the carriage body, respectively, and is operated by contact with the dog unit 40 installed on the rail unit 110.

The sensor unit 20 is installed on the side of the carriage in order to recognize the presence or absence of the object to be welded, as shown in Figure 4, the fixing bracket 21 is connected and installed on the body side of the carriage, and the fixing bracket A sliding housing 22 integrally formed at the end of the 21, a moving shaft 23 inserted into the sliding housing 22, and a fixing fixing the moving shaft 23 to the sliding housing 22. A handle 24, a feed slider 25 connected to and installed at a lower end of the moving shaft 23, two feed slide blocks 26 provided on the feed slider 25, and the two feeds. Optical fiber sensor 27 provided in the slide block 26, the slide tenton volume 28 connected and installed with the said feed slider 25, the said feed slider 25, the feed slide block 26, Cable covering the optical fiber sensor 27 and the slide tenton volume 28 It consists of a sheath 29, and transmits the information sensed the presence or absence of the welded object grasped by each optical fiber sensor 27 to the control unit 50 to identify the welding start and the welding end of the butt weld, and mineralization The arc direction and arc end position at the start and end of the welding are determined by adjusting the relative distance between the welding torch installation position and the optical sensor installation by moving the welding direction installation position of the Eve sensor.

The slide unit 30 is to arbitrarily adjust the installation interval of the permanent magnet 140, as shown in Figure 2 slide bar 31 is installed on the entire length of the rail to be located on the lower surface of the rail unit 110 ), A slide housing 32 which is moved along the slide bar 31 and a permanent magnet 140 is installed at a lower portion thereof, and a fixing handle 33 which fixes the slide housing 32 to the slide bar 310. It is configured to be able to arbitrarily adjust the installation interval of the permanent magnet 140 in accordance with the irregular welding object spacing, that is, the shape of the longitudinal steel ("T" type or "L" type, etc.) and the like to be bonded at the same place and In addition to various specifications, the distance between the blocks is variable, so that the slide bar is fixedly attached to the entire length of the rail so that the straight rail can be attached to the surface of the longitudinal stiffener flange. The housing is provided, the slide housing is provided with a slide fixing handle for fixing the slide housing to the slide bar, the slide housing is provided with a permanent magnet installed in the permanent magnet detachable handle installed by the slide housing to be moved along the slide bar interval of installation of the permanent magnet Is to be adjusted arbitrarily.

The dog part 40 is installed on the rail part 110 to limit the driving range of the carriage part 120. As shown in FIG. 5, the dog body 41 positioned on the rail part 110 is located. ), A fixed roller 42 fixed and installed on one side of the dog body 41 and moving along one side of the rail part 110, and fixed to be movable on another side of the dog body 41. The guide roller 43 is installed and moved along another side of the rail unit 110, and the rack gear 111 installed through the center of the dog body 41 and installed on the upper surface of the rail unit 110. A fixed shaft 44 having an end inserted into and contacting the bone of the bone, a fixed shaft handle 45 provided at an upper end of the fixed shaft 44, a flange 441 and a dog body formed on the fixed shaft 44; Spring 46 is installed between the 41 and the dog plate 47 is installed on one side of the dog body 41 to operate the limit switch unit 10. When the contact between the fixed shaft 44 and the rack gear 111, the fixed roller 42 and the guide roller 43 by the dog portion 40 along the rail portion 110 to any position It moves, and the position of the dog part 40 is fixed by the contact of the fixed shaft 44 and the rack gear 111. As shown in FIG.

On one side of the dog body 41 into which the shaft of the guide roller 43 is inserted, a long groove 411 is formed in a direction perpendicular to the rail unit 110, and is screwed to the shaft end of the guide roller 43. The fixed / moving handle 48 is installed to move the shaft of the guide roller 43 along the long groove 411, so that the distance between the fixed roller 42 and the guide roller 43 can be adjusted. The position of the guide roller 43 is fixed to the plating body 41 by the handle 48.

That is, the dog part 40 is assembled with the rail unit 110 to the dog body 41, the width of the two fixed rollers 42 and the rail unit 110 that can rotate and move along the rail unit 110 The guide roller 43 and the fixing / moving handle 48 are installed in the dog body 41 so as to open or narrow the distance between the rollers. When the dog body 41 is moved, the spring 46 is compressed and fixed. By lifting the shaft handle 45 upward, the fixed shaft 44 and the rail rack gear 111 are separated, and when the fixed shaft handle 45 is released, the spring 46 is a flange of the fixed shaft 44. By pressing 441, the fixed shaft 44 and the rack gear 111 of the rail part are engaged, and the dog part 40 cannot move arbitrarily on a rail.

As such, the present invention determines the start member and the last member of the longitudinal reinforcing material to be welded sequentially at the same place, and to be located at the height corresponding to the limit switch portion of the carriage in the rail portion of the position where the start member and the last member are located. When the dog part is installed and automatic welding is started from the start member, welding is sequentially performed to the last member, and the limit switch part installed on the front of the carriage and the dog part installed at the last member position come into contact with each other, which causes the welding carriage to be automatically stopped by the controller. In addition, it returns to the start member at a high speed again and is automatically stopped by the contact between the limit switch part installed at the rear of the carriage and the dog part installed at the start member position to wait for the next equipment operation.

The control unit 50 controls the gas metal arc welding apparatus, and as shown in FIG. 3, at the beginning and end of the longitudinal reinforcing material flange portion, the start and end portions of the weld metal are piled up to be equivalent to the weld center portion. The welding current regulator 51, the welding voltage regulator 52, the welding speed regulator 53, the welding speed regulator 53, and the initial welding condition holding time regulator so that the welding current can be welded at a lower welding speed and a lower welding speed than the main welding part. 54), crater welding condition holding time adjuster 55, intermittent / continuous switch 56, oscillator operating condition adjusting device 57, main welding condition adjusting device 58, welding mode selection function switch name plate 59, and the like. When the welding start switch is operated, the carriage part moves forward, the end of the member is sensed by the optical fiber sensor for welding start recognition, and the initial / crater welding condition at the welding start part. After the arc is generated, the welding is performed during the initial welding time, and then the welding condition is automatically changed to the main welding condition, and the welding is continued. When the end of the member is sensed by the optical fiber sensor for recognizing the welding end, After changing this welding condition to initial / crater welding condition, welding is continued for the end welding time and then welding is finished automatically. At this time, when the welding is completed, the carriage travels until the end of the next member is sensed by the welding start recognition optical fiber sensor at a high speed which is automatically set to repeat the above process.

In addition, when the intermittent / continuous switch 56 of the control unit is set to "continuous", the welding apparatus is automatically welded in a continuous operation as described above, and when set to "interrupted", one welded object is welded after starting welding like a normal automatic welding carriage. At the end, the welding work is finished.

Figure 6 shows a flow chart according to the present invention, if you want to perform the welding operation using the present invention, first install the rail in accordance with the welding line, and then install the welding equipment on the rail, then the welding start site Position the equipment and adjust to standard welding conditions.

When the welding preparation is completed as described above, the welding start button of the controller is pressed to turn on the welding carriage. As the welding carriage travels, the sensor unit installed at one side of the carriage recognizes the end of the welding member, and the oscillator is turned on by the controller according to the recognition, and the carriage is switched to the initial connection, and according to the initial welding condition. An arc is generated to perform initial welding.

When the initial welding is completed by the above process, the carriage is switched to the main connection by the control unit, and the arc is outputted according to the main welding conditions to perform the main welding, and another end of the welding member is formed by the sensor unit. If recognized, the carriage is switched to crater speed and the arc is output according to crater welding conditions.

When welding of the crater is completed, the welding arc and the oscillator are turned off, the carriage travels at a high speed, and when the limit switch part installed in front of the carriage contacts the dog part, the carriage stops and reverse travels in the direction opposite to the traveling direction. When the limit switch portion provided at the rear of the carriage contacts the dog portion provided at the start member position, the carriage is stopped and welding is completed.

In addition, when welding of the crater is completed and the start of another welding member is recognized in the sensor unit of the carriage which is traveling at high speed, the oscillator is turned on again, the carriage is switched to the initial connection, and the arc due to the initial welding condition After the initial welding is generated, the main welding and crate welding processes are repeated.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Thus, the present invention is to weld the gas metal arc of the flange butt joints of longitudinal longitudinal stiffeners in sequence by automatic welding equipment in a welding structure in which a plurality of longitudinal stiffener joints are arranged in a line, reducing the welding maneuver according to the improvement of the welding arc rate There are many effects, such as improved welding quality, reduced welder fatigue, reduced dependence on operator's function, and mechanized welding work so that the welding worker can work at a distance from the welding arc generator.

Claims (5)

A gas metal arc welding method of flange butt joints of longitudinal stiffeners; Installing a gas metal arc welding device on a rail unit installed in accordance with the welding line; Setting the installed gas metal arc welding device according to welding conditions; Driving the set gas metal arc welding device along a rail; Recognizing the end of the welding member by the sensor of the gas metal arc welding device; An oscillator is turned on by the controller in accordance with the recognition of the end of the welding member, the carriage is switched to the initial connection, an arc is generated according to the initial welding condition, and the initial welding is performed during the set initial welding condition time; Switching to the carriage base main welding speed by the control unit upon completion of the initial welding and outputting an arc according to the main welding condition; Recognizing the end of the welding member by the sensor unit provided on one side of the carriage; Welding the crater during the set crate welding condition time by switching the speed of the carriage to the crater welding speed by the controller and outputting an arc according to the crate welding condition according to the recognition of the end of the welding member by the sensor unit; The welding arc and the oscillator are turned off by the control unit and the carriage travels at a high speed according to the completion of welding of the crater unit; Repeating the initial welding, the main welding, and the crater welding by recognizing an end of another welding member in the sensor unit of the high speed traveling carriage; A limit switch provided in front of the carriage body in high speed contacting the dog plate provided in the dog part of the rail part to stop the carriage by the controller; Butt joint automatic welding method characterized in that the limit switch installed behind the stationary carriage body is in contact with the dog plate of the dog portion is stopped after the carriage advances to perform the welding automatically by the step of welding is completed. A straight rail part installed along the welding line on the longitudinal stiffener flange surface, a carriage part for moving the welding apparatus along the rail part, an oscillator part moving by the carriage part and oscillating a welding torch, carriage, oscillator, welder A gas metal arc welding apparatus having a control box for setting an output condition and a welding torch for welding a welded object; A limit switch unit installed to protrude before / after the body of the carriage unit; A dog part installed at both ends of the rail part at a height corresponding to a limit switch part to limit a driving range of the carriage; A slide part installed to be in contact with the lower surface of the rail part to adjust a position of the permanent magnet; A sensor unit installed at one side of the carriage to recognize an end of the welding member; Butt joint welding device characterized in that it comprises a control unit for controlling the traveling speed of the carriage, welding conditions, welding start / end by the signal of the limit switch unit, the sensor unit. The method of claim 2; The dog part is fixed to the dog body positioned above the rail part, a fixed roller installed on one side of the dog body and moved along one side of the rail part, and fixed to the other side of the dog body. A guide roller which is moved along another side of the rail part, a fixed shaft which penetrates and contacts an end of the rack gear installed through the center of the dog body and installed on the upper surface of the rail part, Butt joint automatic welding comprising a fixed shaft handle installed on the upper end, a spring installed between the flange formed on the fixed shaft and the dog body, and a dog plate installed on one side of the dog body to operate the limit switch. Device. The method of claim 2; The slide unit includes a slide bar installed at the full length of the rail so as to be located on the lower surface of the rail unit, a slide housing moved along the slide bar and having a permanent magnet installed at the bottom thereof, and a fixing handle for fixing the slide housing to the slide bar. Butt joint automatic welding device, characterized in that. The method of claim 2; The sensor unit is fixed to the fixing bracket which is connected to the body side of the carriage, the sliding housing is formed integrally at the end of the fixing bracket, the moving shaft inserted into the sliding housing, and the moving shaft fixed to the sliding housing A fixed handle, a feed slider connected to and installed at a lower end of the moving shaft, two feed slide blocks provided on the feed slider, an optical fiber sensor provided on the two feed slide blocks, and the feed slider. And a slide tenton volume connected to and installed in the casing, and a casing covering the transfer slider, the transfer slide block, the optical fiber sensor, and the slide tenton volume.