JP2005111512A - Sheet metal cylinder welding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet metal cylinder welding machine capable of obtaining high working efficiency in welding a sheet metal cylindrical member and welding the sheet metal cylindrical member of various kinds of sizes with one welding machine. <P>SOLUTION: In a welding machine body 1, a turnable index table 2 to support one end of at least one metal core Q in the circumferential direction is provided on one side surface of an upper supporting stand 1a, and a core supporting member 3 and a deflection preventive member 4 which are elevatable/lowering and support the other end side and a lower side of a center part of the core Q with one end supported by the index table 2 are installed on an upper side of a lower supporting stand 1b. A pair of openable/closable butted members 5a and 5b to maintain both joined edge portions Wa in the longitudinal direction of a thin plate cylindrical member W inserted in the core Q in a butted state are provided on an upper side of the upper supporting stand 1a, and a torch 6 which is elevated/lowered with respect to both joining edge portions Wa of the sheet metal cylindrical member W, moved along the joining edge portions Wa and welds the joining edge portions Wa is provided thereabove. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a thin plate cylindrical welder, and more particularly to a thin plate cylindrical welder capable of efficiently welding both joint edges in the longitudinal direction of a thin plate cylindrical member corresponding to the cylinder size.

  Conventionally, various inventions have been proposed as a welding method in which side edges of a thin metal plate (for example, 0.1 to 2.0 mm) are butted and joined (see, for example, Patent Document 1).

  Also, in piping for aircraft, vehicles, etc., when a metal thin plate is formed in a cylindrical shape and both joint edges in the longitudinal direction are welded with a torch, a cored bar (mandrel) corresponding to the inner diameter is attached to the inside of the thin plate cylindrical member. It is common to use and weld the torch while traveling along both joined edges of the thin cylindrical member.

  By the way, there are various thin plate cylinder members that are welded plate materials, from small diameter (10mm to 20mm) to medium diameter and large diameter (30mm to 100mm), and thin plate cylinders having such various inner diameters. When welding the members, it was necessary to exchange the size of the cored bar for each cylindrical diameter and length.

  However, the core metal of the conventional thin plate cylindrical welder is often a fixed type (generally, the removal of the metal core is not considered), and the work of removing and installing the metal core takes a lot of labor and time. It is very difficult to weld thin plate cylinders of various sizes with this welding machine, and there is a problem that work efficiency is extremely poor.

Furthermore, when welding a thin cylindrical member with a long size, it is necessary to use a long cored bar correspondingly. However, since the cored bar has a both-end support structure, the central part of the thin cylindrical member is bent during welding. There were problems such as poor welding.
JP-A-7-284993 (2nd to 4th pages, FIG. 1)

  This invention pays attention to such a conventional problem, and when welding a thin cylindrical member, it can be replaced for each size without removing the metal core, shortening the welding work time and improving the welding work efficiency. Further, it is an object of the present invention to provide a thin plate cylindrical welder capable of welding thin plate cylindrical members of various sizes with a single welder.

  In order to achieve the above object, the present invention provides a pivotable index table that supports at least one end of one or more core bars in the circumferential direction on one side surface of the upper support base of the welder body, An upper and lower cored bar support member and a deflection preventing member that support the other end side of the core bar supported at one end by the index table and the lower surface of the central part are installed on the upper surface, and the core bar is disposed on the upper surface of the upper support base. A pair of openable and closable butting members are provided to hold the two joining edges in the longitudinal direction of the thin plate cylindrical member inserted into the joint, and above the butting members, with respect to both joining edges of the thin plate cylindrical member The gist of the present invention is to provide a torch that can be moved up and down, moves along both joint edges, and welds both joint edges.

  Here, a passage through which the antioxidant gas is circulated is provided inside the metal core, and when welding both joint edges of the thin plate cylindrical member with the torch, the antioxidant gas is jetted to the welded portion. The torch configured to weld both the joining edges is configured to run at a predetermined speed via a control device in accordance with the thickness of the thin cylindrical member.

  Thus, since it can replace | exchange for every size of the thin-plate cylindrical member to weld, without removing a metal core, it can shorten the time of welding operation and can improve welding operation efficiency, and it is various by one welding machine. A thin cylindrical member of a size can be welded. Moreover, since it comprised so that the lower surface of the center part of a metal core might be supported by the bending prevention member, the bending of a metal core center part can be prevented at the time of welding, and a welding defect can be prevented.

  As described above, the present invention provides a pivotable index table that supports at least one end of at least one core bar in the circumferential direction on one side surface of the upper support base of the welder body, and on the upper surface of the lower support base. An up-and-down movable core metal support member and a deflection preventing member that support the other end side of the core metal supported at one end by the index table and the lower surface of the central part are installed, and inserted into the metal core on the upper surface of the upper support base. A pair of openable and closable butting members are provided to hold the two joined edges in the longitudinal direction of the thin plate cylindrical member in contact with each other, and are raised and lowered with respect to both joined edges of the thin plate cylindrical member above the butted member It is possible to move along both joint edges, and a torch that welds both joint edges is provided, so it can be easily replaced without removing the core for each size of the thin cylindrical member to be welded This Result, time saving and welding, it is possible to improve the welding work efficiency, also has the effect of it is able to weld the thin cylindrical member of various sizes by a single welding machine. Moreover, since it comprised so that the lower surface of the center part of a metal core might be supported by the bending prevention member, the bending of the metal core center part can be prevented at the time of welding, and there exists an effect which can prevent a welding defect.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a front view of a thin plate cylindrical welder embodying the present invention, FIG. 2 is a side view of FIG. 1, and the welder body 1 is made of titanium, parakeet, aluminum or the like having a thickness of about 0.1 to 1.5 mm. It is a device that welds a thin plate cylindrical member W used for pipes with an inner diameter of about 10 mm to 100 mm with a thin plate material made of a raw material. A pivotable index table 2 that supports one end of a metal core Q made of at least one metal (in this embodiment, copper having good thermal conductivity) is provided in a direction, and a support base 1 On the upper surface of the lower support base 1b forming the core metal support member 3 and the deflection preventing member 4 which can be moved up and down to support the other end side of the core metal Q supported at one end by the index table 2 and the lower surface of the central portion, Is installed.

  On the upper surface of the upper support 1a, as shown in FIGS. 2 to 4, the longitudinal direction of a thin plate cylindrical member W having an inner diameter of about 10 mm to 100 mm and a thickness of about 0.1 to 1.5 mm inserted into the core metal Q A pair of openable and closable butting members 5a and 5b that hold both the joining edge portions Wa of each other are provided, and further above the joining members 5a and 5b, both joining edge portions of the thin plate cylindrical member W are provided. A torch 6 that can move up and down with respect to Wa and moves along both joint edges Wa and welds both joint edges Wa is provided.

  In the index table 2, a disc-shaped positioning table 8 is attached to a rotating shaft 7 that can be rotated 360 degrees, which is attached to the upper support base 1a, by a bolt or the like. For example, a support member 9 having a concave cross section for supporting the end portion of the core metal Q is provided at intervals of 90 degrees. The number, size, and the like of the support members 9 are arbitrarily set according to the size of the thin cylindrical member W.

  Reference numeral 10 denotes a fixing pin for fixing the positioning table 8 to the side surface of the rotary shaft 7. The pin 10 is detachably engaged with the through hole 11 formed in the positioning table 8 and the rotary shaft 7, and the index table 2 is arbitrarily set. It can be stopped and fixed at an angle of.

  The core metal support member 3 and the deflection preventing member 4 are respectively attached to the tips of the rods 12a and 13a of the elevating cylinders 12 and 13 installed vertically on the lower support base 1b. The lower surface of the central portion and the lower surface of the other end (tip side) are supported.

  A pair of butting members 5a and 5b disposed on the upper surface of the upper support 1a along the longitudinal direction of the thin cylindrical member W are arranged on the center of the index table 2 via a bracket 14 as shown in FIG. The pair of butting members 5a and 5b are installed at symmetrical positions. The presser claws 15a and 15b are swingably mounted around the starting point O, and the tips of the presser claws 15a and 15b are joined to the thin plate cylindrical member W. In this state, the edge Wa is pressed against the center of the upper surface of the core bar Q, and is welded and joined by the torch 6 in this state.

  The tips of the presser claws 15a and 15b are urged in a direction that is always opened by the elastic force of the leaf spring 16 except during welding. Air is introduced into the air bag 18 provided between them, and the tips of the presser claws 15a and 15b are pushed downward by the expansion force so that the joint edges Wa of the thin plate cylindrical member W are brought into contact with the center of the upper surface of the core metal Q. It is configured to hold down in a pressed state.

  A passage 19 through which an antioxidant gas (for example, argon gas) flows is provided in the center of the core bar Q, and one end of the passage 19 is connected to a supply source (not shown) of the antioxidant gas. The other end of the thin cylindrical member W is welded to the joint edge portion Wa by the torch 6 to blow out an antioxidation gas to the welded portion X to blow off air to prevent oxidation during welding. is there.

  Further, the torch 6 that welds both joint edges Wa of the thin plate cylindrical member W rotates the travel mechanism 21 (for example, a ball screw connected to a drive motor) via the control device 20 to rotate the thin plate cylindrical member W. According to the plate thickness, welding can be performed while traveling at a constant or predetermined speed. Reference numeral 22 denotes an elevating cylinder for elevating the torch 6.

  6 to 8 show a case where welding is performed with the inner diameter of about 20 mm to about 50 mm and supporting both ends of the metal core Q through which the medium thin cylindrical member W1 is inserted and the central lower surface. FIG. 11 shows a case where welding is performed in a state where both ends of the core metal Q inserted through a short thin cylindrical member W2 and the central lower surface are supported with an inner diameter of about 10 mm to 30 mm, and further, FIGS. It shows a case where welding is performed in a state in which both ends of the core metal Q inserted through a long thin cylindrical member W3 and the central lower surface are supported with an inner diameter of about 10 to 30 mm.

  Next, the welding method of the thin plate cylindrical member W is demonstrated using the above thin plate cylindrical welders.

  First, when welding a thin plate cylindrical member W having an inner diameter of about 10 mm to 100 mm using a thin plate material made of titanium, parakeet, aluminum or the like having a thickness of about 0.1 to 1.5 mm, the thin plate material made of the above material. Is preformed by a preforming device (not shown) in accordance with the inner diameter to form a preformed product that is rounded into a cylindrical shape.

  Then, the preformed product of the thin cylindrical member W rounded into a cylindrical shape is inserted into the core metal Q corresponding to the inner diameter, and both ends and the center of the core metal Q are connected to the support member 9 of the positioning table 8 of the index table 2. Then, it is supported and positioned and fixed by the core metal support member 3 and the deflection preventing member 4 provided on the lower support base 1b. Then, in a state where both the joint edges Wa of the preform are positioned at the upper center, both joint edges Wa of the thin plate cylindrical member W by the press claws 15a, 15b of the pair of butting members 5a, 5b. Is pressed against the center of the upper surface of the core bar Q.

  In this state, the joining edges Wa are welded and joined from one of the joining edges Wa of the thin cylindrical member W while moving the torch 6 whose welding speed is controlled by the control device 20 at a predetermined speed. However, at this time, welding is performed while blowing an antioxidant gas (in this embodiment, argon gas) to the welded portion X through the passage 19 formed in the center of the core bar Q and blowing off air. Thereby, the joining edge part Wa of the thin plate cylindrical member W can be efficiently and reliably welded.

  Further, when welding thin plate cylindrical members W having different inner diameters, if the core metal Q having a different inner diameter is attached to the positioning table 8 of the index table 2 in advance, the previously used core metal Q is not removed one by one, The following thin plate cylindrical members W having different inner diameters can be easily welded.

  As described above, since the core metal Q can be replaced for each size of the thin plate cylindrical member W to be welded, the welding work time can be shortened and the welding work efficiency can be improved. Thin plate cylindrical members W of various sizes can be welded. Moreover, since it comprised so that the lower surface of the center part of the metal core Q might be supported by the bending prevention member 4, a center part can prevent bending at the time of welding, and a welding defect can be prevented.

It is a front view of the thin plate cylindrical welder which implemented this invention. It is a side view of FIG. It is a partially expanded front view of the index table which supports the end of the core metal of a thin plate cylindrical welder. It is an enlarged side view of an index table. It is an AA arrow expanded sectional view of FIG. It is a partially expanded front view in the case of welding in the state which supported the both ends and center lower surface of the metal core which penetrated the medium-sized thin plate cylindrical member. It is an end view of the BB line of FIG. It is an end view of the CC line of FIG. It is a partially expanded front view in the case of welding in the state which supported the both ends and center lower surface of the metal core which penetrated the short thin plate cylindrical member. FIG. 10 is an end view taken along line DD in FIG. 9. It is an end view of the EE line of FIG. It is a partially expanded front view in the case of welding in the state which supported the both ends and center lower surface of the metal core which penetrated the elongate thin plate cylindrical member. It is an end elevation of the FF line of FIG. It is an end view of the GG line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding machine main body 1a Upper support stand 1b Lower support stand 2 Index table 3 Core metal support member 4 Deflection prevention member 5a, 5b Butting member 6 Torch 7 Rotating shaft 8 Positioning table 9 Support member 10 Fixing pin 11 Through-hole 12, 13 Elevation Cylinder 12a, 13a Rod 14 Bracket 15a, 15b Pressing claw 16 Leaf spring 17 Pressing member 18 Air bag 19 Passage 20 Control device 21 Traveling mechanism 22 Lifting cylinder W Thin plate cylindrical member Wa Joint edge Q Core metal X Welding part

Claims (3)

A pivotable index table that supports one end of at least one core bar in the circumferential direction is provided on one side surface of the upper support base of the welder body, and one end is supported by the index table on the upper surface of the lower support base. A vertically movable cored bar support member and a deflection preventing member for supporting the other end side and the lower surface of the central part of the cored bar are installed, and the longitudinal direction of the thin cylindrical member inserted into the cored bar on the upper surface of the upper support base A pair of openable and closable butting members that hold the joint edges of the thin plate cylindrical members, and can be moved up and down relative to the joint edges of the thin plate cylindrical member above the butted members. A thin plate cylindrical welding machine characterized in that a torch for welding both joint edges is provided. A passage for allowing an antioxidant gas to flow therethrough is provided inside the metal core, and when welding both joint edges of the thin plate cylindrical member with the torch, the antioxidant gas is jetted into the welded portion. Item 2. The thin plate cylindrical welder according to item 1. The thin plate cylindrical welding machine according to claim 1 or 2, wherein the torch for welding both joint edges is caused to travel at a predetermined speed via a control device in accordance with a plate thickness of the thin plate cylindrical member.

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