Auto welding carriage and welding method using thereof

Abstract

The present invention relates to an automatic welding carriage and a welding method using the same, comprising: a main body frame movable in the welding direction; an automatic welding torch frame coupled to the main body frame so as to be movable in the welding direction relative to the main body frame at the top of the main body frame; a guide roller part coupled to the automatic welding torch frame and arranged to extend in a direction perpendicular to the welding direction and contact a welding member; and an automatic welding torch disposed on the automatic welding torch frame and performing welding. When welding the beginning or end of a welding member, only the automatic welding torch frame moves forward or backward in the welding direction, thereby minimizing the occurrence of non-welding work at the beginning or end of the welding member.

Description

Technology Field

[0001] The present invention relates to an automatic welding carriage and a welding method using the same. Specifically, when welding the starting and ending portions of a welding member, the invention relates to an automatic welding carriage and a welding direction using the same, wherein only an automatic welding torch frame, which is movably coupled to the upper part of the main body frame in the welding direction relative to the main body frame, moves forward or backward in the welding direction to minimize the welding of the welding member. Background Technology

[0002] Generally, various types of industrial robots are used in industrial sites to improve work efficiency, and among these are welding robots that weld various materials such as steel plates. In particular, in shipbuilding, it is common practice to form unit structures by welding thick plates, various metal plates, or structural steel materials together, and then assemble and weld them to complete the structure. In shipbuilding, unit structures are formed by welding vertical bulkheads to main plates (metal floor plates) and welding various structural steel materials to these vertical bulkheads. At this time, several devices have been developed and applied in the past for automatically welding by moving an automatic welding torch vertically or horizontally along the corner lines where structural materials meet.

[0003] This automatic welding carriage is a type of welding device designed to automatically perform edge welding, butt welding, and corner welding while moving along a welding line using movable rails or drive wheels.

[0004] However, when using such an automatic welding carriage to weld along the corner line where vertical and horizontal weld members meet, a problem arises where unwelded sections occur at the beginning and end of the weld members. Furthermore, if an operator manually welds these unwelded sections, not only does the weld quality deteriorate, but the operator's labor requirements also become excessive. The problem to be solved

[0005] The present invention aims to solve the problems associated with conventional automatic welding carriages. Specifically, the invention seeks to minimize the occurrence of non-welding work on a welding member by welding the beginning or end of the welding member while moving only the automatic welding torch frame, which is movably coupled to the main body frame in the welding direction, forward or backward in the welding direction.

[0006] The present invention can improve welding quality and reduce the labor of workers by minimizing the occurrence of cost-cutting in welded members.

[0007] In addition, the welding method according to the present invention, which minimizes the occurrence of cost-effective welding, can contribute to increased productivity by reducing corrective welding and grinding work that occurs after welding.

[0008] The objectives of the present invention are not limited to those mentioned above, and other unmentioned objectives will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0009] The present invention may provide an automatic welding carriage comprising a main body frame movable in the welding direction, an automatic welding torch frame coupled to the main body frame so as to be movable in the welding direction relative to the main body frame on the upper part of the main body frame, a guide roller part coupled to the automatic welding torch frame and arranged to extend in a direction perpendicular to the welding direction to contact a welding member, and an automatic welding torch disposed on the automatic welding torch frame and performing welding, wherein when welding the beginning or end part of a welding member, only the automatic welding torch frame moves forward or backward in the welding direction.

[0010] In one example, the automatic welding carriage may include a pair of drive wheels positioned at the bottom of the main body frame to move in the welding direction and connected by a single drive shaft, wherein the drive shaft is inclined clockwise relative to the vertical direction of the welding direction.

[0011] In one example, the automatic welding carriage may include a setting laser that fires a laser at a welding member to mark the starting point of the welding member, and the setting laser may be positioned outside the guide roller.

[0012] In one example, it may include a member detection sensor positioned on the side of the main body frame and detecting a welded member.

[0013] In one example, the automatic welding torch can be coupled to be movable in a direction perpendicular to the welding direction.

[0014] The present invention can provide a welding method using an automatic welding carriage comprising: a setting step in which a setting laser is fired at a welding member to identify the starting point of the welding; a movement step in which only the automatic welding torch frame moves to the rear of the welding direction relative to the main body frame while moving the automatic welding torch to the starting point of the welding; a starting welding step in which only the automatic welding torch frame moves to the front of the welding direction relative to the main body frame while welding the starting part of the welding member; a center welding step in which the main body frame moves to the front of the welding direction while welding the center part of the welding member; a movement stopping step in which the end part of the welding member is recognized through a member detection sensor and the movement of the main body frame is stopped; and an end welding step in which only the automatic welding torch frame moves to the front of the welding direction relative to the main body frame while welding the end part of the welding member.

[0015] In one example, the starting welding step includes a first vertical welding step in which the starting side of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction, and a first welding direction welding step in which the starting part of the welding member is welded while only the automatic welding torch frame moves forward in the welding direction relative to the main body frame. The ending welding step may include a second vertical welding step in which the ending side of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction, and a second vertical welding step in which the ending side of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction. Effects of the invention

[0016] According to an automatic welding carriage according to one embodiment of the present invention, the occurrence of non-welding of a welding member can be minimized by welding the beginning or end of a welding member while only the automatic welding torch frame, which is movably coupled to the main body frame in the welding direction, moves forward or backward in the welding direction.

[0017] According to an automatic welding carriage according to one embodiment of the present invention, by minimizing the occurrence of non-welding work on the welding member, the quality of the welding is improved and the number of workers required for welding can be reduced.

[0018] In addition, according to a welding method that minimizes the occurrence of non-welding work according to one embodiment of the present invention, productivity can be improved by reducing correction welding and grinding work that occurs after welding.

[0019] The effects of the present invention are not limited to those described above, and other unmentioned effects may be clearly understood from the mechanism below. Brief explanation of the drawing

[0020] FIG. 1 is a perspective view illustrating an automatic welding carriage according to one embodiment of the present invention. FIG. 2 is a drawing illustrating an automatic welding carriage according to an embodiment of the present invention welding a welding member. FIG. 3 is a plan view illustrating an automatic welding carriage according to one embodiment of the present invention. FIG. 4 is a plan view illustrating the interior of an automatic welding carriage according to one embodiment of the present invention. FIG. 5 is a flowchart of a welding method using an automatic welding carriage according to one embodiment of the present invention. Specific details for implementing the invention

[0021] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0022] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that another component may also be "connected," "combined," or "joined" between each component.

[0024] Automatic welding carriage

[0025] Below, an automatic welding carriage (100) according to an embodiment of the present invention will be described.

[0026] In the following description, the welding direction is the direction in which the automatic welding carriage (100) moves to weld the welding member (200) as shown in FIG. 2. Additionally, the front of the welding direction is the left direction in FIG. 2, and the rear of the welding direction is the right direction in FIG. 2.

[0027] Referring to FIGS. 1 and 2, the automatic welding carriage (100) comprises a main body frame (110) movable in the welding direction, an automatic welding torch frame (120) coupled to the main body frame (110) so as to be movable in the welding direction, a guide roller part (130) coupled to the automatic welding torch frame (120) and extended in a direction perpendicular to the welding direction to contact a welding member (200), and an automatic welding torch (140) disposed on the automatic welding torch frame (120) and performing welding, and when welding the beginning or end of the welding member (200), only the automatic welding torch frame (120) can move forward or backward in the welding direction.

[0028] The main body frame (110) can form the basic framework of the frame of the automatic welding carriage (100) body and can be moved in the welding direction. In the present invention, it is described as a square-shaped frame, but is not limited thereto.

[0029] Referring to FIG. 4, a pair of drive wheels (112) connected by a single drive shaft (111) are provided at the front and rear of the main body frame (110), respectively, at the lower part of the main body frame (110). The drive wheels (112) may be configured to rotate so that the automatic welding carriage (100) moves in the welding direction.

[0030] The drive shaft (111) may be tilted clockwise relative to the vertical direction of the welding direction. The angle at which the drive shaft (111) is tilted may be approximately 2 degrees, but is not limited thereto. By tilting the drive shaft (111), the automatic welding carriage (100) can travel in the direction where the welding member (200) is located.

[0031] As the main body frame (110) moves forward or backward in the welding direction, the automatic welding torch (140) can weld the welding member (200) forward or backward in the welding direction. In particular, when the main body frame (110) moves forward or backward in the welding direction, the center of the welding member (200) can be welded by the automatic welding torch (140).

[0032] The automatic welding torch frame (120) can be coupled to the upper part of the main body frame (110) so as to be movable in the welding direction relative to the main body frame (110). An automatic welding torch (140) can be provided on the upper part of the automatic welding torch frame (120). More specifically, a power unit (190) can be disposed on the upper surface of the automatic welding torch frame (120). The automatic welding torch (140) can be provided on the upper part of the automatic welding torch frame (120) by being connected to the power unit (190) disposed on the upper surface of the automatic welding torch frame (120) by a first connecting member (121).

[0033] The automatic welding torch frame (120) can move only the automatic welding torch frame (120) forward or backward in the welding direction relative to the main body frame (110) from the upper part of the main body frame (110). The automatic welding torch (140) described later can weld the beginning or end of a welding member (200) while moving only the automatic welding torch frame (120) forward or backward in the welding direction relative to the main body frame (110).

[0034] The guide roller section (130) may include a pair of guide rollers (131) that can guide the automatic welding carriage (100) to move in the welding direction while rotating in contact with the welding member (200), and a second connecting member (132) that extends in a direction perpendicular to the welding direction and connects the automatic welding frame (120) and the guide rollers (131).

[0035] The guide roller (131) may be coupled to a second connecting member (132) so as to be rotatable while in contact with the welding member (200). In the present invention, the guide roller (131) and the second connecting member (13) are coupled by screw connection, but the method of coupling is not limited thereto.

[0036] The guide roller section (130) can guide the automatic welding carriage (100) to move while maintaining a constant distance from the welding member (200).

[0037] An automatic welding torch (140) is placed on an automatic welding torch frame (120) and can weld a welding member (200). The automatic welding torch (140) is mounted on a torch clamp (141), and the automatic welding torch (140) is fixed by a torch fixing means (142), so that the length of the automatic welding torch (140) can be adjusted by the torch clamp (141) and the torch fixing means (142).

[0038] The automatic welding torch (140) is connected to the automatic welding torch frame (120) by the first connecting member (121), and the automatic welding torch (140) is connected so that it can move in a direction perpendicular to the welding direction. While moving in a direction perpendicular to the welding direction, the automatic welding torch (140) can weld the starting side or the end side of the welding member (200).

[0039] The setting laser (150) may be positioned outside the guide roller section (130) and placed on the main body frame (110). The setting laser (150) may be placed on at least one side, either the left or the right, of the guide roller section (130). In the present invention, the state in which the setting laser (150) is placed on the right side of the guide roller section (130) is described, but it is not limited thereto. The setting laser (150) can determine the starting point of the welding by firing a laser at the welding member (200).

[0040] After identifying the starting point of the welding member (200) by the setting laser (150), the automatic welding torch frame (120) can move only to the rear of the main body frame (110) in the welding direction, thereby moving the automatic welding torch (140) to the starting point of the welding. Afterwards, the automatic welding torch frame (120) can move only to the front of the main body frame (110) in the welding direction, thereby welding the starting part of the welding member (200).

[0041] Referring to FIG. 3, the center of the setting laser (150) and the right end of the right first connecting member (121) may be spaced apart. Preferably, the center of the setting laser (150) and the right end of the right first connecting member (121) may be spaced apart by about 10 mm. With this arrangement, even if the setting laser (150) points toward the beginning of the welding member (200), the guide roller (131) on the right may not move away from the welding member (200).

[0042] The absence detection sensor (160) is positioned on at least one side of the main body frame (110), either the left or the right side, and the absence detection sensor (160) may include a photoelectric sensor. In the present invention, the state in which the absence detection sensor (160) is positioned on the left side of the main body frame (110) is described, but it is not limited thereto.

[0043] When the main body frame (110) moves in the welding direction to perform welding, the member detection sensor (160) recognizes the end portion of the welding member (200) and the control unit (180) can stop the movement of the main body frame (110). When the movement of the main body frame (110) is stopped, only the automatic welding torch frame (120) moves forward in the welding direction relative to the main body frame (110) and can weld the end portion of the welding member (200) by the automatic welding torch (140).

[0044] The handle (170) is described as being positioned on the left side of the main body frame (110), but is not limited thereto. Additionally, the handle (170) may be connected to the main body frame (110) by screw connection, but is not limited thereto.

[0045] The control unit (180) is provided on the upper part of the main body frame (110) and may be equipped with various operation switches (not shown) for controlling the operation of the automatic welding carriage (100).

[0046] The power unit (190) is positioned on the upper right side of the automatic torch frame (120) and is equipped with a drive motor (not shown) to provide rotational force to the drive shaft (111).

[0047] The present invention can minimize non-welding of a welding member (200) by welding the starting or ending portion of a welding member (200) while moving only the automatic welding torch frame (120), which is movably coupled to the main body frame (110) in the welding direction, forward or backward in the welding direction, or by welding the starting side portion or ending side portion of a welding member (200) while moving the automatic welding torch (140) in a direction perpendicular to the welding direction.

[0048] By minimizing the occurrence of non-welding in the welded member (200), the quality of the weld is improved, and the time required for a worker to weld non-welding can be reduced. In addition, work such as correction welding and weld bead grinding is reduced, which can contribute to increased productivity.

[0049] Welding method using an automatic welding carriage

[0050] Below, a welding method (S100) using an automatic welding carriage according to an embodiment of the present invention will be described.

[0052] Referring to FIG. 5, the automatic welding carriage welding method (S100) comprises: a setting step (S110) in which a setting laser (150) fires a laser at a welding member (200) to identify the starting point of the welding; a movement step (S120) in which only the automatic welding torch frame (120) moves to the rear of the main body frame (110) in the welding direction and moves the automatic welding torch (140) to the starting point of the welding; a starting part welding step (S130) in which only the automatic welding torch frame (120) moves to the front of the main body frame (110) in the welding direction and welds the starting part of the welding member (200); a center part welding step (S140) in which the main body frame (110) moves to the front of the welding direction and welds the center part of the welding member (200); a movement stopping step (S150) in which the end part of the welding member (200) is recognized through a member detection sensor (160) and the movement of the main body frame (110) is stopped; and the automatic welding torch The process may include an end welding step (S160) in which only the frame (120) moves forward in the welding direction relative to the main body frame (110) and welds the end portion of the welding member (200).

[0053] The starting part welding step (S130) may include a first vertical welding step (S131) ​​in which the starting side part of the welding member (200) is welded while the automatic welding torch (140) moves in a direction perpendicular to the welding direction, and a first welding direction welding step (S132) in which the starting part of the welding member (200) is welded while only the automatic welding torch frame (120) moves forward in the welding direction relative to the main body frame (110).

[0054] The end welding step (S160) may include a second welding direction welding step (S161) in which only the automatic welding torch frame (120) moves forward in the welding direction relative to the main body frame (110) to weld the end portion of the welding member (200), and a second vertical direction welding step (S162) in which the automatic welding torch (140) moves in a direction perpendicular to the welding direction to weld the end side portion of the welding member (200).

[0055] The automatic welding carriage (100) has various welding mechanisms, but below, six welding mechanisms will be explained.

[0057] (First welding mechanism)

[0058] When the operator presses the start button (not shown) located in the control unit (180), the automatic welding carriage (100) can proceed with the setting step (S110) and the movement step (S120). Then, when the operator presses the start button located in the control unit (180) once again, the automatic welding carriage (100) can proceed with the first vertical welding step (S131), the first welding direction welding step (S132), the center welding step (S140), the movement stop step (S150), the second welding direction welding step (S161), and the second vertical welding step (S162).

[0060] (Second welding mechanism)

[0061] When the operator presses the start button located in the control unit (180), the center welding step (S140), the movement stop step (S150), the second welding direction welding step (S161), and the second vertical direction welding step (S162) can be performed while moving forward in the welding direction.

[0063] (3rd welding mechanism)

[0064] When the operator presses the start button located in the control unit (180), the center welding step (S140), the movement stop step (S150), the second welding direction welding step (S161), and the second vertical direction welding step (S162) can be performed in the rearward direction of the welding direction.

[0066] (4th welding mechanism)

[0067] When the operator presses the start button located in the control unit (180), the operator can proceed only with the center welding step (S140) while moving forward or backward in the welding direction.

[0069] (5th welding mechanism)

[0070] When the operator presses the start button on the control unit (180), the automatic welding carriage (100) can proceed with the setting step (S110) and the movement step (S120). Then, when the operator presses the start button on the control unit (180) once again, the automatic welding carriage (100) can proceed with the first vertical welding step (S131), the first welding direction welding step (S132), the movement stop step (S150), the second welding direction welding step (S161), and the second vertical welding step (S162).

[0072] (6th welding mechanism)

[0073] When the operator presses the start button on the control unit (180), the automatic welding carriage (100) can proceed with the setting step (S110) and the movement step (S120). Then, when the operator presses the start button on the control unit (180) once again, the starting welding step (S130), the movement stop step (S150), the second welding direction welding step (S161), and the second vertical direction welding step (S162) can be performed.

[0075] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0077] 100: Automatic welding carriage 110: Main body frame 111: Drive shaft 112: Drive wheel 120: Automatic welding torch frame 121: First connecting member 130: Guide roller section 131: Guide roller 132: Second connecting member 140: Automatic welding torch 141: Torch Clamp 142: Torch Fixing Means 150: Setting Laser 160: Absence detection sensor 170: Handle 180: Control unit 190: Power unit 200: Welded member S100: Automatic welding carriage welding method S110: Setting Step S120: Movement step S130: Starting section welding step S131: 1st vertical welding step S132: First welding direction welding step S140: Center welding step S150: Movement interruption step S160 End welding step S161: Second welding direction welding step S162: Second vertical welding step

Claims

Claim 1 An automatic welding carriage comprising: a main body frame movable in the welding direction; an automatic welding torch frame coupled to the main body frame on the upper part thereof so as to be movable in the welding direction relative to the main body frame; a guide roller portion coupled to the automatic welding torch frame and extended in a direction perpendicular to the welding direction to contact a welding member; and an automatic welding torch disposed on the automatic welding torch frame and performing welding, wherein when welding the beginning or end portion of the welding member, only the automatic welding torch frame moves forward or backward in the welding direction. Claim 2 An automatic welding carriage according to claim 1, comprising a pair of drive wheels positioned at the lower part of the main body frame to be moved in the welding direction and connected by a single drive shaft, wherein the drive shaft is inclined clockwise with respect to the vertical direction of the welding direction. Claim 3 The automatic welding carriage of claim 1, comprising a setting laser that emits a laser to the welding member to indicate the starting point of the welding member, wherein the setting laser is positioned outside the guide roller portion. Claim 4 An automatic welding carriage according to claim 1, comprising a member detection sensor disposed on the side of the main body frame and detecting the welding member. Claim 5 In claim 1, the automatic welding torch is coupled to an automatic welding carriage that is movable in a direction perpendicular to the welding direction. Claim 6 A welding method using an automatic welding carriage, comprising: a setting step in which a setting laser is fired at a welding member to identify the starting point of the welding; a moving step in which only the automatic welding torch frame moves to the rear of the welding direction relative to the main body frame and moves the automatic welding torch to the starting point of the welding; a starting welding step in which only the automatic welding torch frame moves to the front of the welding direction relative to the main body frame and welds the starting part of the welding member; a center welding step in which the main body frame moves to the front of the welding direction and welds the center of the welding member; a movement stopping step in which the end part of the welding member is recognized through a member detection sensor and the movement of the main body frame is stopped; and an end welding step in which only the automatic welding torch frame moves to the front of the welding direction relative to the main body frame and welds the end part of the welding member. Claim 7 A welding method using an automatic welding carriage according to claim 6, wherein the starting part welding step comprises a first vertical welding step in which the starting side portion of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction, and a first welding direction welding step in which the starting portion of the welding member is welded while only the automatic welding torch frame moves forward in the welding direction relative to the main body frame, and the end part welding step comprises a second vertical welding step in which the end side portion of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction, and a second vertical welding step in which the end side portion of the welding member is welded while the automatic welding torch moves in a direction perpendicular to the welding direction.

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