CN111822833B

CN111822833B - Welding system of automobile oil filling pipe

Info

Publication number: CN111822833B
Application number: CN202010539045.1A
Authority: CN
Inventors: 郑新月
Original assignee: Wenzhou Hengyi Locomotive Parts Co ltd
Current assignee: Wenzhou Hengyi locomotive parts Co.,Ltd.
Priority date: 2020-06-13
Filing date: 2020-06-13
Publication date: 2021-02-26
Anticipated expiration: 2040-06-13
Also published as: CN111822833A

Abstract

The invention relates to a welding system of an automobile oil filling pipe. The welding system of car oil filler pipe includes fixed subassembly, transfer subassembly and welding subassembly soon, fixed subassembly includes mount and arc backup pad, the middle part of mount is provided with the fixed plate, the arc backup pad is installed in the tip of mount, transfer the subassembly including swiveling wheel and operation panel soon, the swiveling wheel supports and connects in the tip of mount in the arc backup pad and rotate, be formed with the die cavity in the swiveling wheel, the perisporium of die cavity is concave on establishing and is formed with a plurality of machines and adds the spout, the different setting of degree of depth that a plurality of machines add the spout, the operation panel is installed in the one end that the swiveling wheel deviates from the mount. The welding system of the automobile oil filling pipe can correct the bending of the electrode mounting column and improve the welding quality.

Description

Welding system of automobile oil filling pipe

Technical Field

The invention relates to a welding system of an automobile oil filling pipe.

Background

The automobile oil filling pipe is made by the metal casing after the punching press, need form a whole through welded fastening, utilizes first electrode pole installation first electrode generally, utilizes second electrode pole installation second electrode, and first electrode pole suspension, second electrode pole are fixed. The metal shells are connected between the first electrode and the second electrode, so that the metal materials are melted by current, and the metal shells are welded and fixed. However, since the first electrode rod is thin, it is easily bent during a long-term use, which affects welding quality.

Disclosure of Invention

Therefore, the welding system of the automobile oil filling pipe with better welding quality is needed to be provided.

A welding system of an automobile oil filling pipe comprises a fixing assembly, a rotary adjusting assembly and a welding assembly, wherein the fixing assembly comprises a fixing frame and an arc-shaped supporting plate, a fixing plate is arranged in the middle of the fixing frame, the arc-shaped supporting plate is installed at the end part of the fixing frame, the rotary adjusting assembly comprises a rotary wheel and an operating plate, the rotary wheel is supported on the arc-shaped supporting plate and is rotatably connected to the end part of the fixing frame, a casting cavity is formed in the rotary wheel, a plurality of machining chutes are concavely formed in the peripheral wall of the casting cavity, the depths of the machining chutes are arranged in different manners, the operating plate is installed at one end of the rotary wheel, which is far away from the fixing frame, the welding assembly comprises an alignment shaft, an elastic tension rod, a rotary shaft, a rotary support and an electrode mounting column, one end of the alignment shaft is inserted into the casting cavity of the rotary wheel and is supported on, the bottom of elastic tension pole is connected in the middle part of counterpoint axle, and the rotation axis is installed in the lower part of mount, rotates the middle part of support and rotationally overlaps on locating the rotation axis, and electrode erection column fixed mounting is in the lower extreme of rotating the support.

In one embodiment, the fixing frame comprises two frame bodies parallel to each other and a connecting plate, and the two frame bodies are fixed together through the connecting plate.

In one embodiment, each frame body comprises a cross beam and a longitudinal beam, the longitudinal beam is vertically connected to one end of the cross beam far away from the rotating wheel, the cross beam and the longitudinal beam are integrally formed, and the connecting plate is connected to the end, adjacent to the longitudinal beam, of the cross beam.

In one embodiment, the two opposite sides of the fixing plate are respectively fixed in the middle of the two beams, the aligning shaft is in a cylindrical rod shape and is located between the two beams, the rotating support comprises a sleeve plate and a mounting plate which are vertically connected with each other, the top end of the sleeve plate is fixed at the end portion, away from the rotating wheel, of the aligning shaft, and the mounting plate is vertically fixed at the bottom end of the sleeve plate.

In one embodiment, an obtuse angle is formed between the sleeve plate and the alignment shaft, a cylinder is formed in the middle of the sleeve plate, the cylinder is rotatably sleeved on the rotating shaft, and the end of the electrode mounting column is fixed to one end, far away from the sleeve plate, of the mounting plate.

In one embodiment, the electrode mounting column is in the shape of a cylindrical rod, the electrode mounting column is parallel to the alignment axis, and the upper electrode is mounted on the electrode mounting column.

In one embodiment, the welding device further comprises a welding table, a protruding frame is arranged on the periphery of the welding table in a protruding mode, the fixing frame is fixed to the top of the protruding frame, and the welding table is provided with a lower electrode.

In one embodiment, the sheet metal frame is welded at one end, away from the connecting plate, of the two cross beams, the longitudinal axis is arranged on the sheet metal frame in a protruding mode, and the rotating wheel is rotatably sleeved on the longitudinal axis.

In one embodiment, the rotator wheel is made of stainless steel material, the diameter of the alignment axis is larger than the diameter of the longitudinal axis, the longitudinal axis is parallel to and above the alignment axis, and the cross-section of the cross-beam is rectangular.

In one embodiment, one end of the arc-shaped support plate is fixed to the lower sides of the end portions of the two cross beams, an arc-shaped sliding surface is formed on the arc-shaped support plate, and the peripheral surface of the rotating wheel is slidably supported on the arc-shaped sliding surface.

After long-term welding, thereby the electrode erection post is crooked because of taking place for the less thin emergence of diameter, need adjust the whole angle of electrode erection post this moment, when the adjustment, through rotatory this swiveling wheel so that the counterpoint axle gets into in the machine of another different degree of depth adds the spout, thereby make the tip altitude variation to suitable position of counterpoint axle, and then drive the rotatory certain angle of electrode erection post through rotating the support, with the angular deviation that the correction electrode erection post brought because of the bending, fix the swiveling wheel afterwards again. Through the rotation action of swiveling wheel, can adjust the height of the tip of this counterpoint axle, finally adjust the whole angle of electrode erection column to the electrode on it is parallel with another electrode, corrects the deviation, and then can improve subsequent welding quality.

Drawings

FIG. 1 is a perspective view of a welding system for a fuel filler tube of an automobile according to one embodiment.

Fig. 2 is a perspective view of a rotary adjustment assembly according to an embodiment.

FIG. 3 is a perspective view from another perspective of the welding system for the fuel filler tube of the vehicle shown in FIG. 1.

Fig. 4 is a perspective view of a rotary adjustment assembly according to an embodiment.

Fig. 5 is a partially enlarged view of a portion a in fig. 3.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention relates to a welding system of an automobile oil filling pipe. For example, welding system of car oil filler pipe includes fixed subassembly, adjusts subassembly and welding subassembly soon, and fixed subassembly includes mount and arc backup pad, and the middle part of mount is provided with the fixed plate. For example, the arc-shaped supporting plate is installed at the end part of the fixing frame, the rotary adjusting assembly comprises a rotary wheel and an operating plate, the rotary wheel is supported on the arc-shaped supporting plate and is rotatably connected to the end part of the fixing frame, and a casting cavity is formed in the rotary wheel. For example, a plurality of machining sliding grooves are concavely formed in the peripheral wall of the casting cavity, the depths of the machining sliding grooves are different, the operating plate is installed at one end, away from the fixing frame, of the rotating wheel, and the welding assembly comprises an alignment shaft, an elastic tension rod, a rotating shaft, a rotating support and an electrode mounting column. For example, one end of the aligning shaft is inserted into the casting cavity of the rotating wheel and is supported on the bottom surface of the machining sliding groove, the top of the elastic tension rod is connected to the fixing plate, and the bottom of the elastic tension rod is connected to the middle of the aligning shaft. For example, the other end of the alignment shaft is connected with a rotating bracket, the rotating shaft is installed at the lower part of the fixed frame, the middle part of the rotating bracket is rotatably sleeved on the rotating shaft, and the electrode mounting column is fixedly installed at the lower end of the rotating bracket.

Referring to fig. 1 to 5, a welding system for an automotive fuel filler tube includes a fixing assembly 10, a rotary adjusting assembly 20 and a welding assembly 40, wherein the fixing assembly 10 includes a fixing frame 11 and an arc-shaped supporting plate 13, a fixing plate 115 is disposed in the middle of the fixing frame 11, the arc-shaped supporting plate 13 is mounted at an end of the fixing frame 11, the rotary adjusting assembly 20 includes a rotary wheel 21 and an operating plate 25, the rotary wheel 21 is supported on the arc-shaped supporting plate 13 and rotatably connected to an end of the fixing frame 11, a mold cavity 215 is formed in the rotary wheel 21, a plurality of mechanical runners 218 are concavely formed on a peripheral wall of the mold cavity 215, depths of the mechanical runners 218 are different, the operating plate 25 is mounted at an end of the rotary wheel 21 away from the fixing frame 11, the welding assembly 40 includes an alignment shaft 41, an elastic tension rod 42, a rotary shaft 43, a rotary bracket 44 and an electrode mounting post 45, one end of the alignment shaft 41 is inserted into the mold cavity 215 of the rotary wheel, the other end of the alignment shaft 41 is connected with a rotating bracket 44, the top of the elastic tension rod 42 is connected to the fixing plate 115, the bottom of the elastic tension rod 42 is connected to the middle of the alignment shaft 41, the rotating shaft 43 is installed at the lower part of the fixing frame 11, the middle of the rotating bracket 44 is rotatably sleeved on the rotating shaft 43, and the electrode mounting post 45 is fixedly installed at the lower end of the rotating bracket 44.

After long-term welding, thereby electrode erection column 45 is crooked because the diameter is less thin, need adjust electrode erection column 45's whole angle this moment, when the adjustment, through rotatory this swiveling wheel 21 so that counterpoint axle 41 gets into in the machine of another different degree of depth adds spout 218, thereby make the tip altitude variation of counterpoint axle 41 to suitable position, and then drive electrode erection column 45 rotatory certain angle through rotating support 44, with the angular deviation that correction electrode erection column 45 brought because of the bending, it is fixed with swiveling wheel 21 afterwards. The height of the end of the alignment shaft 41 can be adjusted by the rotation of the rotation wheel 21, and the overall angle of the electrode mounting post 45 is finally adjusted so that the electrode thereon is parallel to the other electrode, thereby correcting the deviation and improving the subsequent welding quality. For example, the electrode is used to weld the automotive fuel filler tube 100.

For example, to facilitate the hanging of the alignment shaft 41, the fixing frame 11 includes two frame bodies 12 parallel to each other and a connecting plate 14, and the two frame bodies 12 are fixed together by the connecting plate 14. Each frame 12 comprises a cross member 121 and a longitudinal member 125, the longitudinal member 125 is perpendicularly connected to an end of the cross member 121 remote from the rotary wheel 21, the cross member 121 and the longitudinal member 125 are integrally formed, and the connecting plate 14 is connected to an end of the cross member 121 adjacent to the longitudinal member 125. Opposite sides of the fixing plate 115 are fixed to the middle of the two cross beams 121, respectively, and the alignment shaft 41 is in the shape of a cylindrical rod and is located between the two cross beams 121. By providing two frame bodies 12, it is convenient to dispose the alignment shaft 41 between the cross beams 121 of the two frame bodies 12, thereby facilitating the protection of the alignment shaft 41.

For example, in order to facilitate the rotation bracket 44 to be rotatably mounted on the rotation shaft 43, the rotation bracket 44 includes a sleeve plate 441 and a mounting plate 443 that are vertically connected to each other, a top end of the sleeve plate 441 is fixed to an end of the alignment shaft 41 away from the rotation wheel 21, and the mounting plate 443 is vertically fixed to a bottom end of the sleeve plate 441. An obtuse angle is formed between the sleeve plate 441 and the alignment shaft 41, a cylinder 445 is formed in the middle of the sleeve plate 441, the cylinder 445 is rotatably sleeved on the rotating shaft 43, and the end of the electrode mounting post 45 is fixed to one end of the mounting plate 443, which is far away from the sleeve plate 441. The electrode mounting post 45 is in the shape of a cylindrical rod, the electrode mounting post 45 is parallel to the alignment axis 41, and an upper electrode is mounted on the electrode mounting post 45. The cylinder 445 is conveniently sleeved on the rotating shaft 43 by arranging the cylinder 445 at the middle part of the sleeve plate 441, so that the rotating of the rotating bracket 44 is facilitated.

For example, in order to rotatably mount the rotating wheel 21, the welding system for the fuel filler pipe of the automobile further includes a welding table (not shown), a protruding frame is protruded on the periphery of the welding table, the fixing frame 11 is fixed on the top of the protruding frame, and the welding table is mounted with the lower electrode. The sheet metal frame 16 is welded at one end of the two cross beams 121 far away from the connecting plate 14, a longitudinal axis 165 is convexly arranged on the sheet metal frame 16, and the rotating wheel 21 is rotatably sleeved on the longitudinal axis 165. The rotating wheel 21 is made of stainless steel material, the diameter of the alignment shaft 41 is larger than that of the longitudinal shaft 165, the longitudinal shaft 165 is positioned above the alignment shaft 41 in parallel, and the cross-section of the beam 121 is rectangular. One end of the arc support plate 13 is fixed to the lower side of the end portions of the two cross members 121, an arc slide surface is formed on the arc support plate 13, and the circumferential surface of the rotating wheel 21 is slidably supported on the arc slide surface. By arranging the longitudinal shaft 165, the rotating wheel 21 is rotatably sleeved on the longitudinal shaft 165 and is supported on the arc-shaped picture in a sliding manner by utilizing the circumferential surface of the rotating wheel 21, so that the rotating wheel 21 can be rotated conveniently.

For example, it is particularly important that the rotating wheel 21 includes a casting wheel body 211, an annular flange 212 and a sleeve 213, the casting cavity 215 penetrates through two opposite end surfaces of the casting wheel body 211, the cross section of the casting cavity 215 is a quadrilateral, the number of the machining slide grooves 218 is four, and the four machining slide grooves 218 are respectively located at four corners of the casting cavity 215. The annular flange 212 is fixed to an end of the casting wheel body 211 far away from the cross beam 121, and an end of the mold cavity 215 is blocked at an inner side of the annular flange 212. The annular flange 212 has an outer diameter less than the outer diameter of the cast wheel body 211. Four through holes 214 are formed through the annular flange 212, and the four through holes 214 are aligned with the ends of four machining slide grooves 218 respectively. The end face of the alignment shaft 41 is provided with a screw hole for aligning the through hole 214. The rotation adjustment assembly 20 further includes a screw (not shown) passing through the through hole 214 and screwed into the screw hole of the alignment shaft 41 to fix the alignment shaft 41 to the rotation wheel 21. The depth of each machining slide slot 218 gradually decreases in a direction toward the annular flange 212 (i.e., the machining slide slot 218 extends obliquely in a direction toward the annular flange 212, and the depth of the machining slide slot 218 gradually decreases in a direction toward the annular flange 212), so that the alignment shaft 41 supported within the machining slide slot 218 can be adjusted to a corresponding inclination angle. Specifically, the plurality of machining grooves 218 are differently formed in depth, that is, a distance between a bottom surface of each machining groove and an outer circumferential edge of the rotating wheel is differently formed in each radial section of the rotating wheel (in a circular section formed by cutting in a direction perpendicular to the axial direction).

For example, the inner side of the annular flange 212 is provided with a plurality of fastening strips 216 protruding in a radially inward direction, the sleeve 213 is rotatably sleeved on the end of the longitudinal shaft 165, and the ends of the fastening strips 216 are fixed on the circumferential surface of the sleeve 213. In order to shield the annular flange 212, the operation plate 25 includes two semicircular plates 251 and a circular shaft, the circular shaft is fixed on the annular flange 212 and passes through the center of the annular flange 212, the two semicircular plates 251 are respectively connected to two opposite sides of the circular shaft by hinges, and the two semicircular plates 251 are combined into a circular plate to shield the four through holes 214 on the annular flange 212. When the rotating wheel 21 needs to be driven to rotate, the two semicircular plates 251 can be turned by about 90 degrees, so that the two semicircular plates 251 are overlapped, then the two semicircular plates 251 are pinched by hands to drive the rotating wheel 21 to rotate, during the rotation, the alignment shaft 41 goes out of the machining sliding grooves 218 and slides along the circumferential surface of the casting cavity 215 and raises the position until the alignment shaft 41 slides into the adjacent machining sliding groove 218, and then the alignment shaft 41 is fixed by screwing in a screw. The two semicircular plate bodies 251 are turned over to shield the annular flange 212, and the elastic tension rod 42 can elastically support the alignment shaft 41 downwards in the process of passing through the machining chute 218, so that the alignment shaft 41 is prevented from being randomly jumped off, and the stability of the lifting action of the alignment shaft 41 is improved. For example, in other embodiments, the number of machining runners 218 may be designed to be greater than four.

For example, referring to fig. 4 again, in order to further improve the rotation convenience of the driving rotation wheel 21, an L-shaped groove 253 is formed in one of the semicircular plates 251, the L-shaped groove 253 includes a radial groove 2531 and an axial groove 2535 which are perpendicularly connected to each other, the axial groove 2535 is parallel to the longitudinal axis 165, and an end of the axial groove 2535 penetrates through the periphery of the semicircular plate 251. A connecting shaft 2532 is provided in the axial groove 2535, an L-shaped lever 2534 is provided in the L-shaped groove 253, and an end of the L-shaped lever 2534 is rotatably connected to the connecting shaft 2532. When it is still difficult to rotate the two overlapped semicircular plates 251, the L-shaped wrench plate is rotated around the connecting shaft 2532, so that the L-shaped wrench rod 2534 can be rotated by rotating the semicircular plates 251 with the L-shaped wrench rod 2534, thereby saving time and labor.

For example, referring to fig. 2 again, in order to facilitate positioning of the casting wheel 211 so that the machining slide groove 218 can align with the alignment shaft 41, four rectangular positioning holes 210 are formed on the outer circumferential surface of the casting wheel 211, and the four rectangular positioning holes 210 are aligned with the four machining slide grooves 218, respectively. The arc-shaped support plate 13 comprises a limit frame 17, an arc-shaped plate 18 and a telescopic clamping column 19, the limit frame 17 comprises an arc-shaped strip 171 and two limit strips 175, two opposite ends of the arc-shaped strip 171 are respectively fixed at the end parts of the two cross beams 121, the two limit strips 175 are respectively vertically and convexly arranged at two opposite ends of the arc-shaped strip 171, opposite barbs 178 are formed at the end parts of the two limit strips 175, and the end surface periphery of the cast wheel body 211 is stopped by the two opposite barbs 178. The arc plate 18 is located between the two limiting strips 175, two opposite sides of the arc plate 18 respectively slidably abut against the two limiting strips 175, and the arc plate 18 is connected to the middle of the arc strip 171 through a tension spring. The arc-shaped sliding surface is formed on the arc-shaped plate 18 and the two limit strips 175. The retractable clip 19 is disposed on the arc plate 18 and is aligned and clipped into one of the rectangular positioning holes 210 to position the casting wheel 211.

When the casting wheel body 211 needs to be rotated, the retractable clamping columns 19 are pulled out by hands and the arc-shaped plate 18 is slid, so that the retractable clamping columns 19 are separated from the rectangular positioning holes 210 and abut against the circumferential surface of the casting wheel body 211, then the operation plate 25 can be used for driving the casting wheel body 211 to rotate, the friction force of the retractable clamping columns 19 abutting against the circumferential surface of the casting wheel body 211 can improve the stability of the casting wheel body 211 during rotation, and after the cast wheel body is rotated to the right position, the arc-shaped plate 18 can be released, so that the arc-shaped plate 18 returns to the original position under the action of the tension spring, so that the retractable clamping columns 19 align with the rectangular positioning holes 210, at the moment, the retractable clamping columns 19 are pressed and clamped into the rectangular positioning holes 210, so that the casting wheel body 211 can be positioned, the machining slide grooves 218 can accurately align the shafts 41, the alignment accuracy is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A welding system of an automobile oil filling pipe is characterized by comprising a fixing assembly, a rotary adjusting assembly and a welding assembly, wherein the fixing assembly comprises a fixing frame and an arc-shaped supporting plate, a fixing plate is arranged in the middle of the fixing frame, the arc-shaped supporting plate is installed at the end part of the fixing frame, the rotary adjusting assembly comprises a rotary wheel and an operating plate, the rotary wheel is supported on the arc-shaped supporting plate and is rotatably connected to the end part of the fixing frame, a casting cavity is formed in the rotary wheel, a plurality of machining chutes are concavely formed in the peripheral wall of the casting cavity, the depths of the machining chutes are arranged in different manners, the operating plate is installed at one end of the rotary wheel, which is far away from the fixing frame, the welding assembly comprises an alignment shaft, an elastic tension rod, a rotary shaft, a rotary support and an electrode mounting column, one end of the alignment shaft is inserted into the casting cavity, the top of elasticity tension pole is connected on the fixed plate, and the bottom of elasticity tension pole is connected in the middle part of counterpoint axle, and the rotation axis is installed in the lower part of mount, and the rotation axis is located to the middle part of rotating bracket cover with rotating, and electrode erection column fixed mounting is in the lower extreme of rotating bracket.

2. The welding system of claim 1, wherein the fixing frame comprises two frames parallel to each other and a connecting plate, and the two frames are fixed together by the connecting plate.

3. The system of claim 2, wherein each frame comprises a cross member and a longitudinal member, the longitudinal member is perpendicularly attached to an end of the cross member remote from the rotating wheel, the cross member and the longitudinal member are integrally formed, and the connecting plate is attached to an end of the cross member adjacent to the longitudinal member.

4. The welding system for the filler tube of the automobile as claimed in claim 3, wherein opposite sides of the fixing plate are fixed to the middle portions of the two cross members, respectively, the aligning shaft has a cylindrical rod shape and is disposed between the two cross members, the rotating bracket includes a sleeve plate and a mounting plate which are perpendicularly connected to each other, the top end of the sleeve plate is fixed to the end portion of the aligning shaft which is far from the rotating wheel, and the mounting plate is perpendicularly fixed to the bottom end of the sleeve plate.

5. The welding system for the oil filling pipe of the automobile as claimed in claim 4, wherein an obtuse angle is formed between the sleeve plate and the alignment shaft, a cylinder is formed in the middle of the sleeve plate, the cylinder is rotatably fitted over the rotation shaft, and the end of the electrode mounting post is fixed to the end of the mounting plate away from the sleeve plate.

6. The welding system for the oil filler pipe of the automobile as claimed in claim 5, wherein the electrode mounting post is a cylindrical rod, the electrode mounting post is parallel to the alignment axis, and the upper electrode is mounted on the electrode mounting post.

7. The welding system for the oil filling pipe of the automobile as claimed in claim 6, further comprising a welding table, wherein a protruding frame is protruded from the periphery of the welding table, the fixing frame is fixed to the top of the protruding frame, and the welding table is provided with a lower electrode.

8. The welding system of claim 7, wherein a sheet metal frame is welded to the ends of the two cross members away from the connecting plate, a longitudinal axis is disposed on the sheet metal frame, and the rotating wheel is rotatably sleeved on the longitudinal axis.

9. The welding system of claim 8, wherein the rotating wheel is made of a stainless steel material, the diameter of the alignment axis is greater than the diameter of the longitudinal axis, the longitudinal axis is positioned parallel above the alignment axis, and the cross member is rectangular in cross section.

10. The welding system for the filler pipe of the vehicle as claimed in claim 9, wherein one end of the arc support plate is fixed to the lower side of the end portions of the two cross members, the arc support plate having the arc sliding surface formed thereon, and the peripheral surface of the rotary wheel is slidably supported on the arc sliding surface.