Assembling and welding tool for EGR cooler

Abstract

The invention belongs to the field of welding equipment, and provides an EGR cooler assembling and welding tool which comprises two oppositely-distributed supporting parts, two clamping end plates in one-to-one correspondence with the two supporting parts are arranged between the two supporting parts, and a set of end clamping assemblies are arranged between the clamping end plates and the supporting parts. The end clamping assembly is used for clamping an end shell of the EGR cooler, a front clamping piece and a rear clamping piece which are distributed front and back and staggered up and down are arranged between the two clamping end plates, and the front clamping piece and the rear clamping piece are used for clamping a middle half shell of the EGR cooler. The clamping end plate, the front clamping piece and the rear clamping piece are clamped and positioned to form an open type welding seam space, and the open type welding seam space comprises a welding seam area of the end shells and the middle half shells and a butt welding seam area of the two middle half shells. The method is reasonable in design, beneficial to reduction of welding errors and guarantee of welding quality, high in specificity and suitable for large-scale popularization.

Description

Technical Field

[0001] The present invention belongs to the field of welding equipment, relates to welding tooling, and particularly relates to an assembly welding tooling for an EGR cooler. Background Art

[0002] The EGR cooler, i.e., the exhaust gas recirculation cooler, is a key component in the vehicle exhaust gas recirculation system (EGR system). When the engine is running, the ECM controls the opening of the EGR valve according to signals from sensors such as the engine coolant temperature sensor, throttle position sensor, and air flow sensor, so that a part of the high-temperature exhaust gas flows out from the exhaust manifold and enters the EGR cooler through the intake pipe. There are cooling pipes inside the EGR cooler. Usually, a highly efficient heat exchanger structure is adopted inside the cooling pipes, which consists of multiple small channels. The exhaust gas flows in these channels and exchanges heat with the cooling pipe wall, transferring the heat to the cooling medium, thereby rapidly reducing the temperature of the exhaust gas.

[0003] The integrated design of the EGR cooler housing is the result of the balance of reliability, efficiency, and cost. Especially in the scenarios of high-performance engines and strict emission regulations, its advantages are more significant. During the secondary assembly and repair of the EGR cooler housing, it is necessary to separate the housing with the support of certain standards. For example, there are two end shells at both ends of the housing, and the middle part will be divided into two half shells from a position close to the midline, for a total of four disassembled parts. Usually, the welding tooling for the EGR cooler is designed for the pipes and ribs on its housing, such as the assembly welding tooling for the EGR cooler intake pipe disclosed in CN208977178U and an EGR pipe welding positioning device disclosed in CN219131352U. However, when welding the EGR cooler housing, due to the design of the surfaces and ends of the disassembled individuals, such as the pipe orifices and nozzles, there are obvious deficiencies in clamping with non-specialized tooling. On the other hand, when welding, each part that needs to be disassembled needs to be welded one by one, which will increase the welding tolerance, is not conducive to ensuring the product quality, will directly affect the actual life of the product, and increase the cost of replacing the assembly. Summary of the Invention

[0004] Aiming at the technical problems existing in the welding tooling for the above-mentioned EGR cooler, the present invention provides an assembly welding tooling for an EGR cooler with reasonable design, which is beneficial to reducing welding errors, ensuring welding quality, and having strong specificity.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the assembly welding tooling for the EGR cooler provided by the present invention includes two relatively distributed support components. Between the two support components, there are two clamping end plates corresponding to the two support components one by one. A set of end clamping components is arranged between the clamping end plate and the support component, and the end clamping component is used to clamp the end housing of the EGR cooler. Between the two clamping end plates, there are a front clamping member and a rear clamping member distributed front and back and staggered up and down. The front clamping member and the rear clamping member are used to clamp the middle half shell of the EGR cooler. After the clamping end plate, the front clamping member and the rear clamping member are clamped and positioned, an open weld space is formed, and the open weld space includes a weld zone between the end housing and the middle half shell, and a butt weld zone between the two middle half shells.

[0006] Preferably, the front clamping member includes two relatively distributed front support plates that are correspondingly matched with the clamping end plates one by one. Between the front support plates, there are two front clamping plates. Between the front clamping plates, there is a front rib plate. The front support plates, the front clamping plates, and the front rib plate are welded into one body. The front clamping plate includes a front vertical groove portion, the groove back surface of the front vertical groove portion faces the rear clamping member, a vertically long strip-shaped front plate hole is arranged on the groove surface of the front vertical groove portion, an upper limit plate is arranged at the top of the groove back surface of the front vertical groove portion, and the length of the upper limit plate is less than the width of the middle half shell.

[0007] Preferably, the rear clamping member includes two relatively distributed rear support plates that are correspondingly matched with the clamping end plates one by one. Between the rear support plates, there are two rear clamping plates. Between the rear clamping plates, there is a rear rib plate. The rear support plates, the rear clamping plates, and the rear rib plate are welded into one body. The rear clamping plate includes a rear vertical groove portion, the groove back surface of the rear vertical groove portion faces the rear clamping member, a vertically long strip-shaped rear plate hole is arranged on the groove surface of the rear vertical groove portion, a lower limit plate is arranged at the bottom of the groove back surface of the rear vertical groove portion, and the length of the lower limit plate is less than the width of the middle half shell.

[0008] Preferably, the front support plates and the rear support plates are distributed in a staggered up and down manner. There are 4 sliding openings symmetrically distributed in pairs on the clamping end plate. The sliding openings are in horizontal sliding fit with the front support plates and the rear support plates. Both the front support plates and the rear support plates are T-shaped rib plates.

[0009] Preferably, positioning plug covers are arranged on both sides of the clamping end plate. The positioning plug cover is provided with a slot that cooperates with the circumferential part of the clamping end plate. A positioning socket that cooperates with the front support plates and the rear support plates is arranged at a position near one end of the slot. A positioning key is arranged at a position near the other end of the slot. The positioning key is inserted and matched with the sliding opening. A holding protrusion for hand holding is arranged on the outer wall edge of the positioning plug cover.

[0010] Preferably, a front folding plate portion is provided at the bottom of the back surface of the groove of the front clamping plate. The front folding plate portion is first bent upward and then extends forward and bends in the direction of the notch of the front clamping plate. A rear folding plate portion is provided at the bottom of the back surface of the groove of the rear vertical groove portion. The rear folding plate portion is first bent obliquely downward and then extends forward and bends in the direction of the notch of the rear clamping plate. A positioning pull plate is provided between the front clamping member and the rear clamping member. The positioning pull plate is used to control the vertical relative distance and the maximum front-rear distance between the front clamping plate and the rear clamping plate.

[0011] Preferably, the positioning pull plate includes a Z-shaped portion. The top surface of the Z-shaped portion is flush with the lower limit plate. The middle of the Z-shaped portion is parallel to the inclined portion of the rear folding plate and is provided with a waist-shaped hole exposing the weld seam. The two ends of the Z-shaped portion are respectively provided with a front hook plate and a rear hook plate that cooperate with the front folding plate portion and the rear folding plate portion.

[0012] Preferably, the end clamping assembly includes a gland nested and cooperating with the clamping end plate. At least three positioning rods slidably inserted into the gland are provided at the edge of the gland. The two ends of the positioning rod are connected to the support member and the clamping end plate. A spring nested and cooperating with the positioning rod is provided between the end of the clamping end plate and the gland. A lead screw rotatably cooperating with the gland is provided at the center of the gland. A rotating cover is provided at the end of the lead screw. The rotating cover is rotatably cooperated with a lip plate provided on the support member.

[0013] Preferably, the lip plate has a T-shaped structure. An annular groove cooperating with the lip plate is provided inside the rotating cover. A plurality of uniformly distributed handle rings are provided outside the rotating cover.

[0014] Preferably, the support member is provided with an annular support track at one end facing away from the end clamping assembly.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] The assembly welding tooling for the EGR cooler provided by the present invention allows the front clamping member and the rear clamping member to expand and contract the distance along the horizontal direction of the clamping end plate. Expanding the distance facilitates placing the housing of the EGR cooler and the heat exchange devices inside the EGR cooler; reducing the distance can achieve the purpose of clamping. At the same time, the end clamping assembly realizes the clamping of the end housing. Once the clamping is completed, all the weld seams of the EGR cooler can be butt-jointed, and the weld seams are exposed in an open environment, which is beneficial to the welding operation. The device is reasonably designed, is beneficial to reducing welding errors, ensuring welding quality, and has strong specificity, and is suitable for large-scale promotion. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Stereogram of the assembly welding tooling for the EGR cooler provided for the embodiment;

[0019] Figure 2 Front view of the assembly welding tooling for the EGR cooler provided for the embodiment;

[0020] Figure 3 Front view of the assembly welding tooling for the EGR cooler provided for the embodiment after being flipped 180°;

[0021] Figure 4 Stereogram of the assembly welding tooling for the EGR cooler provided for the embodiment after being flipped 180°;

[0022] Figure 5 Side view of the assembly welding tooling for the EGR cooler provided for the embodiment;

[0023] Figure 6 Cross-sectional view of the assembly welding tooling for the EGR cooler provided for the embodiment in the G-G direction;

[0024] Figure 7 Working drawing of the front clamping piece, rear clamping piece and positioning pull plate provided for the embodiment;

[0025] Figure 8 Stereogram of the front clamping piece provided for the embodiment;

[0026] Figure 9 Stereogram of the rear clamping piece provided for the embodiment;

[0027] Figure 10 Stereogram of the positioning pull plate provided for the embodiment;

[0028] Figure 11 Assembly drawing of the clamping end plate and the support component provided for the embodiment;

[0029] Figure 12 Schematic diagram of the weld distribution on the EGR cooler;

[0030] In the above figures:

[0031] 1. Support component; 2. Clamping end plate; 21. Sliding opening; 3. End clamping assembly; 31. Pressure cover; 32. Positioning rod; 33. Lead screw; 34. Rotating cover; 35. Lip plate; 36. Handle ring; 37. Spring; 4. Front clamping part; 41. Front support plate; 42. Front clamping plate; 421. Front vertical groove part; 422. Front plate hole; 423. Upper limit plate; 43. Front rib plate; 44. Front folding plate part; 5. Rear clamping part; 51. Rear support plate; 52. Rear clamping plate; 521. Rear vertical groove part; 522. Rear plate hole; 523. Lower limit plate; 53. Rear rib plate; 54. Rear folding plate part; 6. Positioning pull plate; 61. Z-shaped part; 62. Waist-shaped hole; 63. Front hook plate; 64. Rear hook plate; 7. Annular support track; 8. Positioning plug cover; 81. Slot; 82. Positioning socket; 83. Positioning key; 84. Holding projection; 9. Weld seam. Detailed implementation manner

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. For the convenience of narration, words such as "upper", "lower", "left" and "right" appearing below only indicate the same direction as the upper, lower, left and right directions of the accompanying drawings themselves, and do not limit the structure.

[0033] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0034] Embodiment, as Figures 1 - 12 shown, the assembly welding tooling for the EGR cooler provided by the present invention includes two relatively distributed support components 1. Between the two support components 1, there are provided two clamping end plates 2 corresponding to the two support components 1 one by one. A set of end clamping assemblies 3 are arranged between the clamping end plate 2 and the support component 1. The end clamping assembly 3 is used to clamp the end housing of the EGR cooler. Between the two clamping end plates 2, there are provided a front clamping part 4 and a rear clamping part 5 which are distributed front and rear and are staggered up and down in height. The front clamping part 4 and the rear clamping part 5 are used to clamp the middle half shell of the EGR cooler. After the clamping end plate 2, the front clamping part 4 and the rear clamping part 5 are clamped and positioned, an open weld space is formed. The open weld space includes the weld zone between the end housing and the middle half shell, and the butt weld zone between the two middle half shells. The weld seam 9 is as Figure 12 shown. Among them, the support component 1 is used to install the present device on the welding rack in the workshop, and the support component 1 can realize rotational and positioning connection with the welding rack. The two support components 1 provide an installation and support basis for the end clamping assembly 3, the clamping end plate 2, and the front clamping part 4 and the rear clamping part 5.

[0035] Specifically, the front clamping member 4 and the rear clamping member 5 can be pulled apart and the distance therebetween can be reduced along the horizontal direction of the clamping end plate 2. Pulling apart the distance facilitates placing the housing of the EGR cooler and the heat exchange devices inside the EGR cooler; reducing the distance can achieve the purpose of clamping, and at the same time, the end clamping assembly 3 is used to clamp the end housing, and all the welds of the EGR cooler can be butt-welded after one-time clamping is completed. Further, after the clamping is completed, the open weld space effectively exposes the weld areas between the end housing and the intermediate half-shells, as well as the butt-weld areas of the two intermediate half-shells in an open environment. In particular, the characteristics of the staggered distribution of the front clamping member 4 and the rear clamping member 5 in height can provide sufficient working space for the welding torch to weld the butt-weld areas of the two intermediate half-shells, and the space between the front clamping member 4 and the rear clamping member 5 and the clamping end plate 2 also provides sufficient working space for the welding torch to weld the weld areas between the end housing and the intermediate half-shells. Therefore, through the design of the special tooling provided for the EGR cooler, the present device is beneficial to welding operations, beneficial to reducing welding errors, and ensuring welding quality.

[0036] As Figure 7 and Figure 8 shown, in order to improve the clamping fit effect between the front clamping member 4 and the housing of the EGR cooler, the front clamping member 4 provided by the present invention includes two relatively distributed front support plates 41 that are respectively and correspondingly matched with the clamping end plate 2. Between the front support plates 41, there are two front clamping plates 42, and between the front clamping plates 42, there is a front rib plate 43. The front support plates 41, the front clamping plates 42, and the front rib plate 43 are welded into one body. On the front rib plate 43, there is a handle hole for manually pulling and moving the front clamping member 4. The front clamping plate 42 includes a front vertical groove portion 421. The groove back surface of the front vertical groove portion 421 faces the rear clamping member 5. On the groove surface of the front vertical groove portion 421, there is a vertically long strip-shaped front plate hole 422. At the top of the groove back surface of the front vertical groove portion 421, there is an upper limit plate 423, and the length of the upper limit plate 423 is less than the width of the intermediate half-shell. Among them, the front vertical groove portion 421 is used to directly contact the intermediate half-shell of the housing of the EGR cooler, and its front plate hole 422 provides a clamping site for the pipe orifices on the housing of the EGR cooler, so that the front clamping member 4 can better clamp the intermediate half-shell; on the one hand, the upper limit plate 423 can establish a supporting relationship with a certain area of the intermediate half-shell, and on the other hand, its length design can make the welds of the intermediate half-shell completely exposed, which is beneficial to improving the welding continuity of the welding torch for the welds of the intermediate half-shell; the front support plate 41 pulls apart the distance between the front vertical groove portion 421 and the clamping end plate 2, providing sufficient working space for the welding torch to weld the weld areas between the end housing and the intermediate half-shell. By rotating the support member 1, the welding torch can continuously weld the welds, thereby ensuring the quality and welding efficiency of the weld areas between the end housing and the intermediate half-shell.

[0037] As Figure 7 and Figure 9As shown, in order to improve the clamping and matching effect between the rear-mounted clamp 5 and the EGR cooler shell, the rear-mounted clamp 5 provided by the present invention includes two rear support plates 51 that are relatively distributed and correspond one-to-one with the clamping end plates 2, two rear-mounted clamps 52 are arranged between the rear support plates 51, and a rear rib plate 53 is arranged between the rear-mounted clamps 52. The rear support plates 51, the rear-mounted clamps 52 and the rear rib plates 53 are welded into one, and the rear rib plates 53 are provided with a handle hole for manually pulling and moving the rear-mounted clamp 5, and the rear-mounted clamp 52 includes a rear vertical groove portion 521, the back side of the groove of the rear vertical groove portion 521 faces the rear-mounted clamp 5, and a vertical long strip of rear plate hole 522 is provided on the groove surface of the rear vertical groove portion 521, and a lower limit plate 523 is provided at the bottom of the back side of the groove of the rear vertical groove portion 521, and the length of the lower limit plate 523 is less than the width of the middle half shell. Among them, the rear vertical groove portion 521 is used to directly contact the middle half shell of the EGR cooler shell, and its rear plate hole 522 makes a clamping position for the pipe mouth on the EGR cooler shell, so that the rear clamping part 5 can better clamp the middle half shell; on the one hand, the lower limit plate 523 can establish a certain area of support relationship with the middle half shell, and cooperate with the upper limit plate 423 to complete the clamping of the EGR middle half shell. On the other hand, its length design can make the weld of the middle half shell completely exposed, which is beneficial to improve the welding continuity of the welding gun to the weld of the middle half shell; the rear support plate 51 is to separate the rear vertical groove portion 521 and the clamping end plate 2 to make sufficient working space for the welding gun to weld the weld area of the end shell and the middle half shell. By rotating the support component 1, the welding gun can weld the weld more continuously, thereby ensuring the quality and welding efficiency of the weld area of the end shell and the middle half shell.

[0038] like Figure 7 and Figure 11 As shown, in order to improve welding efficiency, the present invention not only adopts a high-low staggered distribution method for the front clamp 4 and the rear clamp 5, but also adopts a vertically staggered distribution design for the front support plate 41 and the rear support plate 51 provided by the present invention. As a result, when the weld of the middle half shell is directly above, the exposed length of the weld between the end shell and the middle half shell is also maximized, providing more convenient spatial conditions for the operation of the welding gun, the staff and the robot arm, thereby improving welding efficiency and reducing the number and frequency of adjusting the specific angle of the device. Matching this, the clamping end plate 2 provided by the present invention is provided with four sliding openings 21 symmetrically distributed in pairs. The sliding openings 21 are horizontally slidably matched with the front support plate 41 and the rear support plate 51. The front support plate 41 and the rear support plate 51 are both T-shaped ribs. The sliding openings 21 of the front support plate 41 and the rear support plate 51 are diagonally distributed, and the end plate parts of the two are stretched tightly against the surface of the clamping end plate 2. On the one hand, such a design can match the structural characteristics of the front vertical groove portion 421 and the rear vertical groove portion 521. On the other hand, it is beneficial to improve the force uniformity on the clamping end plate 2 after the EGR cooler is clamped and fixed, especially when the center of gravity of the EGR cooler changes during the flipping process.

[0039] As 0]Figure 4 and Figure ll shown, in order to fix the front clamping member 4 and the rear clamping member 5, positioning plug covers 8 are provided on both sides of the clamping end plate 2 provided by the present invention. The positioning plug covers 8 are provided with slots 81 that cooperate with the circumferential portion of the clamping end plate 2. The slots 81 are provided with positioning sockets 82 that cooperate with the front support plate 41 and the rear support plate 51 at a position near one end thereof. The slots 81 are provided with positioning keys 83 at a position near the other end thereof. The positioning keys 83 are inserted and cooperated with the sliding openings 21. A holding protrusion 84 for hand-holding is provided on the outer wall edge of the positioning plug cover 8. Pulling the holding protrusion 84 forcefully can be used to separate the positioning plug cover 8 from the clamping end plate 2. Among them, the sliding openings 21 of the clamping end plate 2 provide a margin for horizontal adjustment for the front clamping member 4 and the rear clamping member 5. If the positioning plug cover 8 is completely inserted and tightened on the clamping end plate 2, the slot wall of the slot 81 is tightly fitted with the plate surface of the clamping end plate 2, and the positioning sockets 82 press the front support plate 41 and the rear support plate 51. At the same time, the positioning keys 83 increase the force-bearing nodes and force-bearing areas between the positioning plug cover 8 and the clamping end plate 2, so as to ensure the positioning effect of the positioning plug cover 8 on the clamping end plate 2, the front clamping member 4 and the rear clamping member 5. It should be noted that when this device is applied to a large-sized EGR cooler, in order to increase the safety mechanism, at least one screw can be provided on the edge of the positioning plug cover 8 for quick connection and fixation.

[0040] As Figure 7 shown, in order to improve the clamping quality of the front clamping member 4 and the rear clamping member 5 on the EGR cooler, a front folding plate portion 44 is provided at the bottom of the groove back surface of the front clamping plate 42 provided by the present invention. The front folding plate portion 44 first bends upward and then extends forward in the direction of the groove opening of the front clamping plate 42. A rear folding plate portion 54 is provided at the bottom of the groove back surface of the rear vertical groove portion 521. The rear folding plate portion 54 first bends obliquely downward and then extends forward in the direction of the groove opening of the rear clamping plate 52. A positioning pull plate 6 is provided between the front clamping member 4 and the rear clamping member 5. The positioning pull plate 6 is used to control the vertical relative distance and the maximum front-rear distance between the front clamping plate 42 and the rear clamping plate 52. In this way, on the one hand, the positioning pull plate 6 is used to extend the support plane of the lower limit plate 523, so as to prevent the intermediate half shell and the heat exchange devices inside the intermediate half shell before complete clamping and fixing. On the other hand, it further stabilizes the high and low staggered positions of the front clamping member 4 and the rear clamping member 5, which is beneficial to ensuring the welding quality.

[0041] As Figure 4 and Figure 10As shown in the figure, the positioning pull plate 6 provided by the present invention includes a Z-shaped portion 61. The top surface of the Z-shaped portion 61 is flush with the lower limit plate 523. The middle of the Z-shaped portion 61 is parallel to the inclined portion of the rear folding plate and is provided with a waist-shaped hole 62 exposing the weld seam. The two ends of the Z-shaped portion 61 are respectively provided with a front hook plate 63 and a rear hook plate 64 that cooperate with the front folding plate portion 44 and the rear folding plate portion 54. Among them, the upper and lower surfaces of the front hook plate 63 can be attached to the inner side of the front folding plate portion 44, or a suspended design can also be adopted, while ensuring that the rear hook plate 64 is attached tightly to the inner side of the rear folding plate portion 54, so as to achieve the purpose of extending the support surface / clamping surface of the lower limit plate 523. There is a certain margin in the horizontal cooperation direction between the front hook plate 63 and the front folding plate portion 44, and between the rear hook plate 64 and the rear folding plate portion 54. Therefore, when installing the EGR cooler, if the front clamping member 4 and the rear clamping member 5 are appropriately separated, not only will the connection relationship not be completely disengaged, but also sufficient space for taking and placing can be left above the two. Moreover, by translating the Z-shaped portion 61, the axial position of the waist-shaped hole 62 can be adjusted. When welding to the corresponding area, the weld seam can be vacated by quickly moving the positioning pull plate 6, thereby ensuring the continuity of the weld seam, ensuring the welding quality, and improving the welding efficiency.

[0042] As Figure 1 , [[ID=)26]]Figure 5 and Figure 6 It should be noted that there seems to be a small error in the original text where "Figure 11" is written as "Figure 11 " in some lines and "Figure 11 " in others. I've translated it as "Figure 11" throughout, but you may want to check the original for consistency. Also, "Figure 25" is likely a misprint and should probably be "Figure 26" based on the sequence. I've translated it as "Figure 26" as it's the closest match in the sequence, but again, check the original for accuracy. shown, in order to improve the clamping efficiency of the end housing for disassembling the EGR cooler, the end clamping assembly 3 provided by the present invention includes a gland 31 nested and cooperating with the clamping end plate 2. At least three positioning rods 32 that are slidably inserted into the gland 31 are provided at the edge of the gland 31. The two ends of the positioning rods 32 are connected to the support member 1 and the clamping end plate 2. A spring 37 that is nested and cooperating with the positioning rods 32 is provided between the end of the clamping end plate 2 and the gland 31. A lead screw 33 that is rotationally cooperated with the gland 31 is provided at the center of the gland 31. A rotating cover 34 is provided at the end of the lead screw 33. The rotating cover 34 is rotationally cooperated with a lip plate 35 provided on the support member 1. Among them, the spring 37 can improve the smoothness of the relative rotation movement process between the lead screw 33 and the gland 31. By controlling the rotating cover 34 to perform a rotating action, a relative rotating action is generated between the lead screw 33 and the gland 31, and the rotating pair processed by the gland 31 and the lead screw 33 can be converted into the axial movement of the gland 31, so as to achieve the purpose of clamping and loosening the end housing and the intermediate half shell.

[0043] Furthermore, the lip plate 35 provided by the present invention has a T-shaped structure. An annular groove that cooperates with the lip plate 35 is provided inside the rotating cover 34. A plurality of uniformly distributed handle rings 36 are provided outside the rotating cover 34. Among them, the handle rings 36 provide a holding node for manually driving the rotating cover 34. If the rotating cover 34 is kept in cooperation with the lip plate 35 through the annular groove, it is beneficial to improve the smoothness of manually controlling and operating the end clamping assembly 3 and is beneficial to improving the clamping efficiency.

[0044] In order to improve the matching performance between the support member 1 and the workshop welding rack, the support member 1 provided by the present invention is provided with an annular support track 7 at one end facing away from the end clamping assembly 3. A support ring and a bearing that cooperate with the annular support track 7 are provided on the welding rack. A positioning pin that can be positioned is provided on the support ring to cooperate with the annular support track 7 to ensure the stability of the whole device during the welding process. The specific angle of the support member 1 can be adjusted by being driven by a power component or can also be adjusted by a manual driving method.

[0045] The above are only the preferred embodiments of the present invention, and are not limitations on the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An assembly welding tooling for an EGR cooler, comprising two relatively distributed support components, characterized in that, There are two clamping end plates corresponding to the two support components respectively arranged between the two support components. A set of end clamping components are arranged between the clamping end plate and the support component, and the end clamping components are used to clamp the end housing of the EGR cooler. Between the two clamping end plates, there are a front clamping part and a rear clamping part which are distributed front and back and staggered up and down. The front clamping part and the rear clamping part are used to clamp the middle half shell of the EGR cooler. After the clamping end plate, the front clamping part and the rear clamping part are clamped and positioned, an open weld space is formed, and the open weld space includes a weld zone between the end housing and the middle half shell and a butt weld zone between the two middle half shells.

2. The assembly welding tooling for the EGR cooler according to claim 1, characterized in that, The front clamping part includes two front support plates which are distributed oppositely and cooperate with the clamping end plate one by one. There are two front clamping plates arranged between the front support plates, and a front rib plate is arranged between the front clamping plates. The front support plate, the front clamping plate and the front rib plate are welded into one body. The front clamping plate includes a front vertical groove part, the groove back surface of the front vertical groove part faces the rear clamping part, a vertically long strip-shaped front plate hole is arranged on the groove surface of the front vertical groove part, and an upper limit plate is arranged at the top of the groove back surface of the front vertical groove part. The length of the upper limit plate is less than the width of the middle half shell.

3. The assembly welding tooling for the EGR cooler according to claim 2, characterized in that, The rear clamping part includes two rear support plates which are distributed oppositely and cooperate with the clamping end plate one by one. There are two rear clamping plates arranged between the rear support plates, and a rear rib plate is arranged between the rear clamping plates. The rear support plate, the rear clamping plate and the rear rib plate are welded into one body. The rear clamping plate includes a rear vertical groove part, the groove back surface of the rear vertical groove part faces the rear clamping part, a vertically long strip-shaped rear plate hole is arranged on the groove surface of the rear vertical groove part, and a lower limit plate is arranged at the bottom of the groove back surface of the rear vertical groove part. The length of the lower limit plate is less than the width of the middle half shell.

4. The assembly and welding tooling for the EGR cooler according to claim 3, characterized in that, The front support plate and the rear support plate are distributed in an up-and-down staggered manner. There are 4 sliding openings which are symmetrically distributed in pairs arranged on the clamping end plate. The sliding openings are in horizontal sliding cooperation with the front support plate and the rear support plate. Both the front support plate and the rear support plate are T-shaped rib plates.

5. The assembly and welding tooling for the EGR cooler according to claim 4, wherein Positioning plug covers are arranged on both sides of the clamping end plate. The positioning plug cover is provided with a slot which is matched with the circumferential part of the clamping end plate. A positioning socket which is matched with the front support plate and the rear support plate is arranged at a position close to one end of the slot. A positioning key is arranged at a position close to the other end of the slot. The positioning key is in plug-in cooperation with the sliding opening. A holding protrusion for hand holding is arranged on the outer wall edge of the positioning plug cover.

6. The assembly welding tooling for the EGR cooler according to claim 3 or 5, characterized in that, A front folding plate part is arranged at the bottom of the groove back surface of the front clamping plate. The front folding plate part is bent and extended upward first and then toward the slot opening of the front clamping plate. A rear folding plate part is arranged at the bottom of the groove back surface of the rear vertical groove part. The rear folding plate part is bent and extended obliquely downward first and then toward the slot opening of the rear clamping plate. A positioning pull plate is arranged between the front clamping part and the rear clamping part, and the positioning pull plate is used to control the up-and-down relative distance and the maximum front-back distance between the front clamping plate and the rear clamping plate.

7. The assembly welding tooling for the EGR cooler according to claim 6, characterized in that, The positioning pull plate includes a Z-shaped part. The top surface of the Z-shaped part is flush with the lower limit plate. The middle of the Z-shaped part is parallel to the inclined part of the rear folding plate and is provided with a waist-shaped hole exposing the weld seam. The two ends of the Z-shaped part are respectively provided with a front hook plate and a rear hook plate that cooperate with the front folding plate part and the rear folding plate part.

8. The assembly and welding tooling for the EGR cooler according to claim 1, characterized in that, The end clamping assembly includes a gland nested and cooperating with the clamping end plate. At least three positioning rods are slidably inserted into the edge of the gland. The two ends of the positioning rods are connected to the support member and the clamping end plate. A spring nested and cooperating with the positioning rods is arranged between the end of the clamping end plate and the gland. A lead screw rotatably cooperating with the gland is arranged at the center of the gland. A rotating cover is arranged at the end of the lead screw. The rotating cover rotatably cooperates with a lip plate arranged on the support member.

9. The assembly and welding tooling for the EGR cooler according to claim 8, characterized in that, The lip plate has a T-shaped structure. An annular groove cooperating with the lip plate is arranged on the inner side of the rotating cover. A plurality of uniformly distributed handle rings are arranged on the outer side of the rotating cover.

10. The assembly welding tooling for the EGR cooler according to claim 1, characterized in that, The support member is provided with an annular support track at one end facing away from the end clamping assembly.

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