KR101494608B1 - Manufacture of exhaust pipe seam welding jigs and fixing them having an exhaust pipe seam welding device for manufacturing - Google Patents

Abstract

The present invention relates to a seam welding fixating jig for manufacturing an exhaust pipe and a seam welding device for manufacturing the exhaust pipe including the same. The present invention can conveniently fixate one side cover and the other side cover consisting of a metal thin film sheet for covering an insulating material of the exhaust pipe and seam welding can be performed without a welding fail including combustion, discoloration, carbonization, and deformation etc.

Description

Technical Field [0001] The present invention relates to a seam welding fixture for manufacturing an exhaust pipe and a seam welding device for manufacturing the same,

The present invention relates to a seam weld for manufacturing an exhaust pipe which can be easily welded to one side cover made of a thin metal sheet for covering a heat insulating material of an exhaust pipe and the other side cover and can be seam welded without welding defect such as combustion, discoloration, A fixed jig and a seam welding device for manufacturing an exhaust pipe having the same.

Generally, in an internal combustion engine that generates power of a medium-sized commercial vehicle such as a truck or a bus, a large amount of harmful particles are discharged when the fuel is burned. The fuel injected from the internal combustion engine for a vehicle ignites self- A large amount of noxious gas such as various particulate matter due to incomplete combustion, nitrogen oxides, unburned hydrocarbons, carbon monoxide and the like is generated in the process of burning and incompletely burning the noxious gas which is incompletely burned in the combustion process of the internal combustion engine, A plurality of connected branch pipes are exhausted to the atmosphere through a muffler through an exhaust pipe and an exhaust pipe which are combined into one, thereby causing air pollution or causing a variety of diseases such as bronchitis and lung cancer to enter the human body and the like.

For this reason, a vehicle using CNG or diesel fuel is equipped with a pretreatment device for reducing exhaust of harmful gas from the engine itself before the exhaust gas is discharged to the outside in order to prevent pollution, and exhaust gas As a post-treatment device, various kinds of soot reduction devices are connected to the pipe to maximize the purification efficiency of the harmful gas in the exhaust gas. The soot reduction device includes a diesel particulate filter (DPF) and a diesel oxidation (DOC) and selective catalytic reduction (SCR). The DPF is an apparatus for collecting particulate matter (PM) and burning and removing the particulate matter (PM) The diesel oxidation catalytic device (DOC) can remove hydrocarbons, carbon monoxide, The selective denitration catalyst unit (SCR) uses an urea solution supplied from a separate urea solution supply unit as an oxidizing agent to remove nitrogen oxides Is reduced.

A catalytic converter such as a diesel oxidation catalyst device or a selective NOx removal catalyst device serves to convert the exhaust gas flowing through the exhaust pipe into a harmless component by a catalyst. At this time, the filtering efficiency greatly depends on the temperature of the exhaust gas. The temperature of the exhaust gas generated from a typical diesel engine is 250 to 300 ° C, but the temperature at which the catalyst can be optimally operated becomes higher. When the exhaust gas is introduced into the catalytic converter through the exhaust pipe, the exhaust pipe is exposed to the air, thereby generating heat loss, and the temperature of the exhaust gas is lowered. As a solution to this problem, there is a complicated method in which fuel is supplied to the exhaust gas flowing into the catalytic converter and heated and burned by the heat source of the exhaust gas to raise the temperature of the exhaust gas to maintain the optimum temperature at which the catalyst can operate . If heat loss is generated in the exhaust pipe when the exhaust gas is introduced into the catalytic converter through the exhaust pipe, the performance of the catalyst for removing the diesel particulate generated in the diesel engine generally decreases. In order to solve such a problem, the heat loss is suppressed by using a heat insulating material on the exhaust pipe surface from the engine to the catalytic converter.

Most of the conventional methods of adhering exhaust pipes use a type in which a heat insulating tape such as glass fiber is wrapped around and fixed to the exhaust pipe. In this case, since the outside of the exhaust pipe is surrounded by the heat insulating tape, it takes a lot of time to insulate the heat insulating tape and it is difficult to surround the heat insulating tape. Further, such a heat insulating tape has a problem that it is harmful to a human body, such as being able to be inhaled into a human body through contact with the body or a respiratory apparatus when the heat insulating tape is installed, because it contains glass.

To solve such a problem, a heat insulating member fastening structure for an exhaust pipe has been proposed in Patent Literature 0001. The heat insulating member fastening structure for the upper exhaust pipe surrounds the outside of the exhaust pipe connected to the exhaust gas inlet introduced into the catalytic converter, the outer skin is made of a waterproof cloth, the inner skin is made of heat resistant cloth and the inside is made of heat resistant fiber, And a plurality of fixing clamps which are accommodated inside the outer shell of the heat insulating portion and are provided at a predetermined interval; and a flood prevention preventing portion provided at both ends of the heat insulating portion and housed in the outer shell . It is advantageous in that it is easy to install, requires less time for installation and has a waterproof function, but even if it is fixed by a fixing clamp, a gap is formed between the heat insulating parts, the heat insulating effect is not good and the occurrence of heat loss can not be effectively suppressed, There is a problem that can be reduced. And the appearance is not beautiful, so the merchantability is not good.

Open Patent Application No. 2007-0067883 (Jun. 29, 2007)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a heat insulating material for a vehicle which can securely fix one side cover and a second side cover, , A seam welding fixture for manufacturing an exhaust pipe which can be seam welded without weld defect such as carbonization and deformation, and a seam welding device for manufacturing an exhaust pipe having the same.

In order to accomplish the above object, the present invention provides a seam welding fixture for manufacturing an exhaust pipe for seam welding one side cover and another side cover which are covered with a heat insulating material wrapping around an outer circumferential surface of an exhaust pipe, comprising: a base member; A front end fixing portion formed at a front side of the base member and fixing a front end portion of the exhaust pipe; A rear end fixing part formed on a rear side of the base member and fixing a rear end of the exhaust pipe; A one-side fixing block formed at one side of the exhaust pipe and having a receiving groove for receiving the one-side cover which is connected to the other side of the exhaust pipe and to which the ground electrode of the seam welding device is connected; A second fixing block formed on the other side of the exhaust pipe and having a receiving groove for receiving the other side cover connected to one side thereof and to which the ground electrode of the seam welding device is connected; And a moving member moving the one fixing block and the other fixing block inward to closely contact the one side cover and the other side cover which are in contact with each other.

In this case, a front end flange and a rear end flange are formed at the front end and the other end of the exhaust pipe, and the front end fixing portion includes a front support vertically formed on the front side of the base member, And a front fixing member formed with a fixing groove in which a lower portion of the front end flange of the pipe is received and fixed.

The rear end fixing part includes a rear supporting part formed on the rear side of the base member in the vertical direction and a rear fixing part provided on the rear supporting part and having a fixing groove, in which a lower portion of the rear end flange of the exhaust pipe is received and fixed, .

Further, one side guide rail is formed on the upper surface of the base member to extend in the left and right direction, and a side movement support is installed on one side of the guide rail so as to be laterally movable, and the one side fixing block is provided on the upper side thereof. The other side supporting block is provided on the other side of the guide rail so as to be movable left and right and the upper side is provided with the other side fixing block. The moving member preferably moves the one side supporting frame and the other side supporting frame inward.

In addition, the moving member is composed of a cylinder body and a cylinder composed of a piston rod drawn and drawn from the cylinder body, and the cylinder body is fixed to the one-side movable support, and the piston rod penetrates through the one- It is preferable that the end portion is fixed to the other movable support.

A plurality of guide rails extending in the left and right direction on the upper surface of the base member are formed at regular intervals. Each of the guide rails includes a plurality of guide rails And a plurality of other side support rods provided on the other side of the plurality of guide rails so as to be movable left and right and having the other side fixing block on the upper side thereof, And a plurality of the other movable support rods are respectively moved inward.

Preferably, the plurality of one-side movable supports elastically support the one fixed block, and the plurality of other movable supports elastically support the other fixed block.

The present invention also relates to a seam welding fixture for manufacturing the exhaust pipe; And a seam welded portion provided on an end of the articulated arm and including a rotary welding electrode for seam-welding an overlapped portion of the one side cover and the other side cover which are provided at the ends of the articulated arm. Lt; / RTI >

Preferably, the shim weld portion is provided with a driving member for rotating the rotary welding electrode at a speed corresponding to the welding speed.

Preferably, the rotary welding electrode of the seam welded portion and the driving member are connected by a connecting gear of a nonconductive material.

The present invention can fix the one side cover and the other side cover, which are made of the thin metal sheet for covering the heat insulating material of the exhaust pipe, to the heat insulating material with a uniform pressure and can perform seam welding without burning, discoloration, There is an effect that can be.

1 is a plan view schematically showing an exhaust pipe having a cover on one side and a cover on the other side,
2 is a plan view schematically showing a seam welding fixture for manufacturing an exhaust pipe according to the present invention,
Fig. 3 is a longitudinal sectional view of Fig. 2,
4 is a plan view schematically showing a state in which the exhaust pipe is fixed to a seam welding fixture for manufacturing an exhaust pipe,
5 is a plan view schematically showing a state in which the one fixing block and the other fixing block are moved inward by the moving member and brought into close contact with the one cover and the other cover,
Fig. 6 is a longitudinal sectional view of Fig. 5,
7 is a longitudinal sectional view schematically showing a seam welding apparatus for manufacturing an exhaust pipe according to the present invention,
8 is a longitudinal sectional view showing a state in which seam welding is performed on overlapping portions of one side cover and the other side cover by a seam welding device,
9 is a front view schematically showing a state in which a drive motor for rotating a rotary welding electrode is provided,
10 is a plan view schematically showing an exhaust pipe in which seam welding is completed.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. It is to be understood that the scope of the present invention is not limited to the following embodiments, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention.

1 is a plan view schematically showing an exhaust pipe to which one side cover and the other side cover are connected.

The shape and structure of the exhaust pipe 10 may be formed in a curved shape as shown in FIG. 1, but the present invention is not limited thereto. Depending on the structure of the vehicle to which the exhaust pipe 10 is applied, And may be made of a structure.

Generally, a front end flange 110 and a rear end flange 130 are formed at the front end and the rear end of the exhaust pipe 10, respectively.

The heat insulating layer may be formed on the entire outer circumferential surface of the exhaust pipe according to the structure and characteristics of the exhaust pipe, or may be formed as a part as shown in FIG. The heat insulating material forming the heat insulating layer may be glass fiber, ceramic fiber, or the like.

The heat insulating layer is covered by the one side cover 310 and the other side cover 320 as shown in FIG.

The one side cover 310 and the other side cover 320 are bonded in a shape corresponding to the shape of the heat insulating layer.

The one side cover 310 and the other side cover 320 can be manufactured by press molding a thin metal sheet.

As the thin metal sheet, it is preferable to use a thin stainless sheet which is light and excellent in durability.

Furthermore, since wrinkles are inevitably generated when the stainless steel sheet is press-molded in a bent structure, it is preferable to use a stainless steel sheet having an embossed pattern for improving the appearance quality.

FIG. 2 is a plan view schematically showing a seam welding fixture for manufacturing an exhaust pipe according to the present invention, and FIG. 3 is a longitudinal sectional view of FIG.

The seam welding fixture jig 40 for manufacturing an exhaust pipe according to the present invention is characterized in that the overlapped portion of the one side cover 310 and the other side cover 320 which are joined while covering the heat insulating material wrapping the outer circumferential surface of the exhaust pipe 10, , Seam welding without defective welding such as discoloration, carbonization and deformation.

2 and 3, the seam welding fixing jig 40 for manufacturing an exhaust pipe according to the present invention includes a base member 410, a front end fixing part 420, a rear end fixing part 430, a fixing part 440, The other side fixing block 450, and the moving member 460.

When the exhaust pipe 10 is in a straight line, the overlapped portions of the one side cover 310 and the other side cover 320, that is, the upper side overlap portion and the lower side overlap portion All parts can be fixed and seam welded.

However, in order to shorten the working time when the exhaust pipe 10 is bent in a predetermined shape, a first core (not shown) for seam welding the upper overlapping portion of the overlapping portions of the one cover 310 and the second cover 320 And a second seam welding fixture for seam welding the welding fixture and the lower overlapped portion.

The exhaust pipe (10) is fixed with the first seam welding fixing jig so as to face the upper side of the upper overlap portion, and is seam welded by seam welding or the like, and then the lower overlap portion is rotated upward, And the exhaust pipe (10) is fixed to the second seam welding fixing jig so as to be seam welded.

Since the second seam welding fixture jig has a shape and structure symmetrical to the first seam welding fixture jig, the first seam welding fixture will be described below. Jig 40 ".

The front end fixing part 420 is formed on the front side of the base member 410 and fixes the front end flange 110 formed at the front end of the exhaust pipe 10.

The front end fixing part 420 includes a front supporting part 422 vertically formed on the front side of the base member 410 and a front supporting part 422 provided on the front supporting part 422, And a front fixing member 424 on which a fixing groove 424a for receiving and fixing the lower portion of the fixing member 424 is formed.

The fixing groove 424a of the front fixing member 424 is formed to open upward so that a lower portion of the front end flange 110 of the exhaust pipe 10 is received.

The rear end fixing part 430 is formed on the rear side of the base member 410, and the rear end of the exhaust pipe 10 is fixed.

A rear end flange 130 is generally formed at the rear end of the exhaust pipe 10.

The rear end fixing part 430 includes a rear supporting part 432 vertically formed on the rear side of the base member and a rear supporting part 432 provided on the rear supporting part 432, And a rear fixing member 434 on which a fixing groove 434a for receiving and fixing the lower portion is formed.

The fixing groove 434a of the rear fixing member 434 is formed to open upward so that a lower portion of the rear end flange 130 of the exhaust pipe 10 is received in the same manner as the front fixing member 424.

The front end flange 110 and the rear end flange 130 of the exhaust pipe 10 are positioned on the upper side of the fixing groove 424a of the front fixing member 424 and the fixing groove 434a of the rear fixing member 434 The front end flange 110 and the rear end flange 130 of the exhaust pipe 10 are fixed to the fixing groove 424a of the front fixing member 424 and the fixing groove 424a of the front fixing member 424, And is inserted and fixed in the fixing groove 434a of the member 434.

And one or more guide rails 470 extending in the lateral direction are provided on the upper surface of the base member 410.

2, three guide rails 470 are provided, but the present invention is not limited thereto.

The one side fixing block 440 is formed to be movable in one side of the guide rail 470 and the other side is provided with a receiving groove 442 for receiving a part of the one side cover 310, And the ground electrode 910 of FIG.

The other side fixing block 450 is formed on the other side of the guide rail 470 to be laterally moved and has a receiving groove 452 on one side thereof for receiving a part of the other side cover 320, The ground electrode 910 is connected.

The moving member 460 moves the one side fixing block 440 and the other side fixing block 450 inward to fix the one side cover 310 and the other side cover 320 tightly fixed to the heat insulating layer .

A one side movable support 445 which is installed on one side of the guide rail 470 so as to be movable left and right and which is provided with the one side fixing block 440 on an upper side thereof, And the other side supporting block 455 having the other side fixing block 450 is disposed on the upper side.

The moving member 460 may move the one side fixing block 440 and the other side fixing block 450 inward.

The moving member 460 is composed of a cylinder body 462 and a cylinder composed of a piston rod 464 drawn and drawn from the cylinder body 462,

The cylinder body 462 is fixed to the one side support plate 445 and the end of the piston rod 464 is fixed to the other side support plate 455 while passing through the one side support plate 445 .

Particularly, since the thickness of the heat insulating layer formed on the outer circumferential surface of the exhaust pipe 10 is different from that of the heat insulating material due to the nature of the heat insulating material, the one side fixing block 440 and the other side fixing block 450 The one side support plate 445 and the other side support plate 455 may be fixed to the one side fixing block 440 and the other side fixing block 450 so as to closely contact the heat insulating layer 20 with a uniform pressure. It is preferable that they are configured to be elastically supported.

In addition, two or more guide rails 470 may be disposed on the base member 410 in the longitudinal direction. In FIG. 2, three guide rails 470 are disposed.

The one side support base 445 and the other side support base 455 are mounted on the three guide rails 470, respectively.

The first one side movement support 445a of the three side support supports 445 elastically supports the front side of the one side fixing block 440 and the second side movement support 445b elastically supports the front side of the one side fixing block 440, And the third one side support frame 445c elastically supports the rear side of the one side fixing block 440. [

The first one of the three movable support rods 455 supports the front portion of the other fixed block 450 in a resilient manner and the second movable support base 455 b supports the other fixed block 450 and the third other-side support base 455c elastically supports the rear portion of the other-side fixing block 450. [

A through hole 446 is formed in an upper portion of the one side support plate 445 and a compression spring 447 is disposed between the one side support plate 445 and the one side fixing block 440.

And the bolt member 448 is screwed to the one fixing block 440 in a state that the bolt member 448 sequentially passes through the through hole 446 of the one side support plate 445 and the compression spring 447. The one side fixing block 440 is resiliently supported by the compression spring 447 on the upper side of the one side support base 445.

A through hole 456 is formed in an upper portion of the other movable support 455 and a compression spring 457 is disposed between the other movable support 455 and the other fixed block 450. A bolt member 458 Is screwed to the other fixing block 450 in a state in which the pressing spring 457 sequentially passes through the through hole 456 of the other movable support 455 and the compression spring 457.

The other side fixing block 450 is elastically supported by the compression spring 457 on the upper side of the other side support base 455.

FIG. 4 is a plan view schematically showing a state in which the exhaust pipe is fixed to a seam welding fixture for manufacturing an exhaust pipe, FIG. 5 is a plan view showing a state in which the one fixing block and the other fixing block are moved inward by the shifting member, FIG. 6 is a longitudinal sectional view of FIG. 5. FIG.

The front end flange 110 and the rear end flange 130 of the exhaust pipe 10 are respectively inserted and fixed to the front end fixing portion 420 and the rear end fixing portion 430 of the seam welding fixing jig 40 .

5 and 6, the moving member 460 of the seam welded and grounded member 40 is driven to move the one fixing block 440 and the other fixing block 450 inward The one side cover 310 and the other side cover 320 are closely fixed to the heat insulating layer of the exhaust pipe 10 by the one side fixing block 440 and the other side fixing block 450.

The one side fixing block 440 and the other side fixing block 450 are elastically supported on the one side support base 445 and the other side support base 455 so that the one side side cover 310 and the other side side cover 320) can be tightly fixed with a constant pressure.

A seam welding space 490 is provided between the one side fixing block 440 and the other side fixing block 450 moved by the moving member 460 and the seam welding space 490 is formed as shown in FIG. The overlapped portion of the one side cover 310 and the other side cover 320 is seam welded.

The ground electrode 910 of the seam welding device is connected to the one fixing block 440 and the other fixing block 450 so that the entire surface of the one cover 310 and the other cover 320 is grounded. There is an advantage that the quality of seam welding is excellent because burning, discoloration, carbonization and the like do not occur during seam welding.

FIG. 7 is a longitudinal sectional view schematically showing a seam welding device for manufacturing an exhaust pipe according to the present invention, and FIG. 8 is a longitudinal sectional view showing a state in which seam welding is performed on overlapping portions of one cover and the other cover by a seam welding device.

7 and 8, the seam welding apparatus for manufacturing an exhaust pipe according to the present invention comprises a seam welding fixture 40 for manufacturing the exhaust pipe; A rotary welding electrode 510 provided at an end of the articulated arm (not shown) for seam-welding an overlapped portion of the one side cover 310 and the other side cover 320, And a shim welded portion 50 included therein.

As shown in FIG. 8, the overlapped portion of the one side cover 310 and the other side cover 320 of the exhaust pipe 10, which are tightly fixed by the seam fixing jig 40 for manufacturing an exhaust pipe, And seam welded to the rotating welding electrode 510 of the seam welding part 50.

The rotary welding electrode 510 of the seam welding part 50 is configured to be rotationally driven in response to the movement of the articulated arm (not shown).

Fig. 9 is a front view schematically showing a state in which a driving motor for rotating a rotating welding electrode is provided, and Fig. 10 is a plan view schematically showing an exhaust pipe in which seam welding is completed.

Discoloration, carbonization, or the like occurs when the overlapping portion of the one side cover 310 and the other side cover 320, which are made of the thin metal sheet 31, is seam welded by using the rotating welding electrode 510 which is rotationally driven It is preferable to rotate the rotary welding electrode 510 at a speed corresponding to the welding speed by a driving member 550 such as a separate driving motor as shown in Fig.

The driving member 550 may be an electric motor or a hydraulic motor and the driving member 550 and the rotary welding electrode 510 may be connected to a connecting gear 540 made of a nonconductive material such as synthetic resin desirable.

410; A base member, 420; Shear anchor,
430; A rear end fixing unit 440; One fixed block,
450; The other stationary block 460; Moving member.

Claims (10)

A seam welding jig for manufacturing an exhaust pipe for seam-welding a one-side cover and a second cover which are covered while covering a heat insulating material wrapping an outer peripheral surface of an exhaust pipe,
A base member;
A front end fixing portion formed at a front side of the base member and fixing a front end portion of the exhaust pipe;
A rear end fixing part formed on a rear side of the base member and fixing a rear end of the exhaust pipe;
A one-side fixing block formed at one side of the exhaust pipe and having a receiving groove for receiving the one-side cover which is connected to the other side of the exhaust pipe and to which the ground electrode of the seam welding device is connected;
A second fixing block formed on the other side of the exhaust pipe and having a receiving groove for receiving the other side cover connected to one side thereof and to which the ground electrode of the seam welding device is connected;
And a moving member which moves the one fixing block and the other fixing block inward to closely contact the one side cover and the other side cover which are in contact with each other.
The method according to claim 1,
A front end flange and a rear end flange are formed at the front end and the other end of the exhaust pipe,
Wherein the front end fixing portion comprises a front supporting member formed in a vertical direction on the front side of the base member and a front fixing member provided on an upper portion of the front supporting member and having a fixing groove in which a lower portion of the front end flange of the exhaust pipe is received and fixed, Wherein the jig is made of a synthetic resin.
3. The method of claim 2,
Wherein the rear end fixing part comprises a rear supporting part formed on the rear side of the base member in a vertical direction and a rear fixing part provided on the rear supporting part and having a fixing groove for receiving and fixing the lower end of the rear end flange of the exhaust pipe Wherein the jig is made of a synthetic resin.
The method according to claim 1,
Wherein at least one guide rail extending in the left-right direction is formed on an upper surface of the base member,
A guide rail provided on one side of the guide rail and movable on one side of the guide rail and having the one side fixing block on the upper side thereof; A movable support is provided,
Wherein the movable member moves the one-side movable support and the other-side movable support inward.
5. The method of claim 4,
Wherein the moving member comprises a cylinder body and a cylinder composed of a piston rod drawn and drawn from the cylinder body,
Wherein the cylinder body is fixed to the one-side movable support, and the end of the piston rod is fixed to the other-side movable base while the piston rod passes through the one-side movable support.
The method according to claim 1,
A plurality of guide rails extending in the lateral direction are formed on the upper surface of the base member at regular intervals,
A plurality of one side support rods provided on one side of the plurality of guide rails so as to be movable left and right and having the one side fixing block on the upper side thereof, And a plurality of other side support rods provided with the other side fixing block,
Wherein the moving member is formed in plurality so as to move the plurality of one-side movable supports and the plurality of other-side movable supports inward, respectively.
The method according to claim 6,
Wherein the plurality of one side support rods elastically support the one side fixing block and the plurality of other side support rods elastically support the other side fixing block.
A seam fixing jig for manufacturing an exhaust pipe according to any one of claims 1 to 7;
And a seam welded portion provided on an end of the articulated arm and including a rotary welding electrode for seam-welding an overlapped portion of the one side cover and the other side cover which are provided at the ends of the articulated arm. .
9. The method of claim 8,
And the shim weld portion is provided with a driving member for rotating the rotary welding electrode at a speed corresponding to the welding speed.
10. The method of claim 9,
Wherein the rotary welding electrode and the driving member of the seam welding part are connected to each other by a connecting gear of a nonconductive material.

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