An EGR cooler spot welding device

Abstract

The present application discloses a spot welding device for an EGR cooler, which includes a main body frame and a welding device. A plurality of clamping stations corresponding to the workpieces to be welded are formed on the main body frame. A base is installed on the main body frame, and a horizontal rotation mechanism and a rotation limiting mechanism are installed on the base. The horizontal rotation mechanism includes a rotation shaft and a turntable. The rotation limiting mechanism includes a limiting member, and the limiting member is installed around the rotation shaft. Above the turntable, a vertical rotation mechanism, a vertical limiting mechanism, and a clamping mechanism are installed. The vertical rotation mechanism includes a rotation shaft and a handle connected to one end of the rotation shaft, and a clamping plate is installed on the rotation shaft. The vertical limiting mechanism limits the rotation angle of the rotation shaft. The welding device performs spot welding on the workpieces to be welded at the clamping stations. The spot welding device for the EGR cooler provided by the present application realizes centralized spot welding of each workpiece to be welded that composes the EGR cooler. The workpiece transfer is simple. The centralized spot welding can greatly improve the dimensional control accuracy, reduce the workpiece flow time, and improve the processing efficiency.

Description

Technical Field

[0001] This application relates to the technical field of automatic spot welding of engine parts, and particularly to a spot welding device for an EGR cooler. Background Art

[0002] EGR (Exhaust Gas Recirculation) refers to an exhaust gas recirculation system. The EGR includes an EGR cooler, which is a device provided to reduce NOx emissions in vehicle exhaust. When the vehicle is at a relatively high speed, a small amount of exhaust gas is re-introduced into the intake valve. The lower the temperature of the exhaust gas, the better the inhibitory effect on NOx in the engine. The EGR cooler can reduce the temperature of the exhaust gas entering the cylinder and reduce NOx emissions.

[0003] The structure of the EGR cooler is mainly a shell-and-tube type, and the threaded tube is used for heat exchange, that is, grooves and raised thread grooves are uniformly formed on the surface of the tube blank. This structure greatly increases the heat exchange area, thereby greatly improving the heat exchange efficiency of the EGR cooler. The existing EGR cooler includes structures such as a shell, a diffuser, a collector, a water pipe, a large bracket, and a small bracket. During the production and assembly process, it is necessary to weld the above-mentioned structural components together. The existing tooling for welding the EGR cooler can be divided into three spot welding processes. The first process: using the first set of tooling to spot weld the shell, diffuser, collector, and large bracket to obtain a primary processed part; the second process: transporting the primary processed part to the second set of tooling, and using the second set of tooling to weld the small bracket on the primary processed part to obtain a secondary processed part; the third process: transporting the secondary processed part to the third set of tooling, and using the third set of tooling to weld the water pipe on the secondary processed part to complete the welding and obtain the EGR cooler. It can be seen that the existing tooling equipment for welding the EGR cooler includes at least three sets. The overall processing process is cumbersome. The logistics transportation of the processed parts occupies a certain amount of time and space. The cumulative error of the three sets of welding tooling equipment is large and the efficiency is low.

[0004] Therefore, it is urgent to propose a new technical solution to solve the problems existing in the prior art. Summary of the Invention

[0005] This application provides a spot welding device for an EGR cooler to solve the problems of large cumulative error and low efficiency in the welding process of the EGR cooler at the present stage.

[0006] To achieve the above object, this application provides the following technical solutions:

[0007] This application provides a spot welding device for an EGR cooler, including a main body frame, and clamping stations corresponding to the parts to be welded are formed on the main body frame, and there are multiple clamping stations;

[0008] The main body frame is provided with a base, and a horizontal slewing mechanism and a slewing limiting mechanism are provided on the base; the horizontal slewing mechanism comprises a slewing driving member, a slewing shaft and a turntable installed at one end of the slewing shaft, and the slewing shaft drives the turntable to rotate under the driving of the slewing driving member; the slewing limiting mechanism is used to limit the rotation angle of the slewing shaft;

[0009] A vertical rotation mechanism, a vertical limiting mechanism and a clamping mechanism are installed above the turntable; the vertical rotation mechanism includes a rotation shaft and a handle arranged at one end of the rotation shaft, a clamping plate is installed on the rotation shaft, and the clamping mechanism is arranged on the clamping plate; when the handle is turned, the rotation shaft rotates, and the vertical limiting mechanism limits the rotation angle of the rotation shaft;

[0010] A plurality of clamping stations are formed on the clamping plate, and the clamping mechanism is used to clamp and fix the workpiece to be welded at the clamping station;

[0011] It also includes a welding device, which is used to perform spot welding on the parts to be welded on each of the clamping stations.

[0012] Furthermore, in the above technical solution, the horizontal swivel mechanism also includes a swivel seat adapted to be installed with the swivel shaft, a mounting hole is formed on the swivel seat, a swivel bearing is adapted to be installed in the mounting hole, and the swivel shaft is adapted to be connected with the swivel bearing.

[0013] Furthermore, the rotary drive component includes a rotary drive motor, and a power output end of the rotary drive motor is connected to the rotary shaft.

[0014] Furthermore, the rotation limiting mechanism includes a limiting plate arranged on the base, the limiting plate is an annular structural component, the limiting plate is installed on the rotating shaft, a plurality of limiting holes are evenly arranged on the limiting plate, the plurality of limiting holes are distributed in a ring shape around the rotating shaft, and a limiting pin is inserted in the limiting hole.

[0015] Furthermore, a plurality of limit connectors are provided on the surface of the turntable facing the base, and the plurality of limit connectors correspond one-to-one to the plurality of limit holes, and one end of the limit pin is inserted into the limit hole, and the other end is inserted into the limit connector.

[0016] Furthermore, two support frames are arranged opposite to each other on the turntable, and a bearing seat is arranged at one end of the support frame away from the turntable, and both ends of the rotating shaft are respectively installed in the bearing seat.

[0017] Furthermore, one end of the rotating shaft passes through the bearing seat and is connected to the handle.

[0018] Furthermore, the clamping plate is parallel to the turntable and arranged relatively spaced apart, and the clamping plate is located between the two support frames.

[0019] Furthermore, the vertical rotation mechanism also includes a slewing bearing installed in the bearing seat, the slewing bearing is embedded in the bearing seat, and the slewing bearing is adaptably connected to the rotating shaft.

[0020] Furthermore, a swivel limit plate is installed on the bearing seat near the handle, and the swivel limit plate is arranged on both sides of the support frame opposite to the handle. The swivel limit plate is provided with a through hole allowing the rotating shaft to pass through. The swivel limit plate is evenly distributed with a plurality of limit holes, and the plurality of limit holes are annularly arranged around the rotating shaft, and the limit holes are close to the edge of the swivel limit plate.

[0021] Furthermore, a plurality of connector holes are provided on the bearing seat near the handle, and the plurality of connector holes correspond one-to-one to the limit holes. A limit pin is inserted in a limit hole and the corresponding connector hole, and the limit pin is used to limit the rotation angle of the clamping plate.

[0022] Furthermore, the clamping mechanism includes a first clamping assembly and a second clamping assembly arranged on the clamping plate, and the first clamping assembly and the second clamping assembly are arranged on two sides of the clamping plate relative to each other.

[0023] Furthermore, the first clamping assembly is arranged on the upper plate surface of the clamping plate, and the first clamping assembly includes a first clamping plate, and two supporting columns are relatively arranged on one side plate surface of the first clamping plate, and a connecting plate is connected to the two supporting columns, and the connecting plate is arranged opposite to the first clamping plate.

[0024] Furthermore, two connecting rods are arranged opposite to each other on the connecting plate, one end of the connecting rod passes through the connecting plate and is connected to the first clamping plate, and the other end is connected to a rod-shaped structural member.

[0025] Furthermore, a through hole is provided on the connecting plate, a bearing is installed in the through hole, a clamping rod is adapted to be installed on the bearing, the clamping rod passes through the bearing hole on the bearing and is connected to the first clamping plate, a connecting hole is provided on the first clamping plate, and the clamping rod is correspondingly inserted into the connecting hole.

[0026] Furthermore, a rotating wheel is installed at the end of the clamping rod away from the first clamping plate, a mounting hole is opened at the center of the rotating wheel, the clamping rod is installed in the mounting hole, and three support rods are arranged on the rotating wheel. The three support rods are located on the same plane and form an angle of 120° with each other.

[0027] Further, the second clamping assembly is arranged below the clamping plate. The second clamping assembly includes a limiting member, a second clamping member, and a second clamping rod connected to the second clamping member. The second clamping member is of a cylindrical structure. The second clamping member is sleeved on the limiting member. The limiting member is installed below the clamping plate. A through groove allowing the second clamping member to pass through is formed in the limiting member. An installation hole is formed in a side of the second clamping member facing away from the clamping plate, and a nut is arranged in the installation hole. One end of the second clamping rod passes through the nut and is connected to the limiting member, and the other end is provided with a slender rod. The second clamping rod is in threaded cooperation with the nut. When the slender rod is rotated, the second clamping member slides up and down along the central axis of the second clamping rod under the drive of the nut.

[0028] Further, the workpiece to be welded includes a diffuser, a collector, a tube shell, a water pipe, and a bracket.

[0029] Further, diffuser clamping stations, collector clamping stations, tube shell clamping stations, water pipe clamping stations, and bracket clamping stations are formed on the clamping plate. Positioning pin holes are arranged on each clamping station, and the pin holes are adaptively connected to pins.

[0030] Further, the clamping mechanism clamps and positions the workpiece to be welded on each clamping station, and the clamping mechanism is used to push the workpiece to be welded on the water pipe clamping station to the positioning surface.

[0031] Further, the welding device is arranged around the body frame. The welding device includes a welding robot. The welding robot has a welding arm and a driving structure for driving the welding arm to move. The welding arm is driven to move to the clamping station and perform corresponding spot welding on the workpiece to be welded at the clamping station.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] 1. The present application provides an EGR cooler spot welding device, which includes a main body frame and a welding device. A clamping station corresponding to the workpiece to be welded is formed on the main body frame. A base is installed on the main body frame, and a horizontal rotation mechanism and a rotation limit mechanism are installed on the base. The horizontal rotation mechanism includes a turntable. Above the turntable, a vertical rotation mechanism, a vertical limit mechanism and a clamping mechanism are installed. The vertical rotation mechanism includes a rotating shaft and a clamping plate. Multiple clamping stations are formed on the clamping plate. The welding device can perform spot welding on the workpiece to be welded at the clamping station, and the clamping mechanism can clamp and fix the workpiece to be welded at the clamping station. Through the cooperation of the vertical rotation mechanism and the vertical limit mechanism, and the cooperation of the horizontal rotation mechanism and the rotation limit mechanism, any-angle rotation of the workpiece to be welded at the clamping station can be realized, which is convenient for spot welding operation. Therefore, the EGR cooler spot welding device provided by the present application, through multiple centrally arranged clamping stations, centrally arranges the welding points, the transfer between workpieces is simple, and through the vertical rotation mechanism and the horizontal rotation mechanism, the position conversion of the workpiece can be realized, and then cooperate with the welding device for spot welding to realize the centralized spot welding of each workpiece to be welded that makes up the EGR cooler. The workpiece transfer is simple, and the centralized spot welding can greatly improve the dimensional control accuracy, reduce the workpiece flow time, and improve the processing efficiency.

[0034] 2. The welding device of the EGR cooler spot welding device provided by the present application can be an auxiliary robot. By cooperating with the auxiliary robot for welding, the efficiency can be further improved. After testing, with the assistance of the auxiliary robot, the spot welding efficiency of the spot welding device provided by the present application is 8-9 times that of the traditional spot welding with three sets of spot welding jigs. When manual spot welding is carried out by welding personnel, after testing, the spot welding efficiency of the spot welding device provided by the present application is 1.5-2 times that of the traditional spot welding with three sets of spot welding jigs.

[0035] 3. The EGR cooler spot welding device provided by the present application can quickly and accurately position the baffle and the shell, and cooperate with resistance welding to realize the welding of the shell and the baffle, greatly increasing the welding dimensional accuracy and stability, improving the efficiency of the baffle installation process, and realizing the centralized batch welding and installation of the baffle and the shell. Brief Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. It should be understood that the specific shapes and structures shown in the drawings are generally not regarded as limiting conditions when implementing the present application. For example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional ratio relationships, etc. based on the technical concepts disclosed in the present application and the exemplary drawings.

[0037] Figure 1 It is a schematic structural diagram of the EGR cooler spot welding device provided by the present application in a first perspective in an embodiment;

[0038] Figure 2 It is a schematic structural diagram of the EGR cooler spot welding device provided by the present application in a second perspective in an embodiment;

[0039] Figure 3 It is a schematic structural diagram of the EGR cooler spot welding device provided by the present application in a third perspective in an embodiment;

[0040] Figure 4 It is a schematic structural diagram of the EGR cooler spot welding device provided by the present application in a fourth perspective in an embodiment.

[0041] Explanation of reference numerals:

[0042] 1. Body frame; 2. Base; 3. Rotating shaft; 4. Rotary bearing; 5. Limiting disc; 6. Limiting pin; 7. Turntable; 8. Support frame; 9. Bearing seat; 10. Rotating shaft; 11. Handle; 12. Rotary limiting plate; 13. Limiting pin; 14. Clamping plate; 15. First clamping plate; 16. Support column; 17. Connecting plate; 18. Link; 19. Clamping rod; 20. Runner; 21. Second clamping member; 22. Nut; 23. Second clamping rod; 24. Limiting member. Detailed implementation manners

[0043] The following will further elaborate on the present application through specific embodiments in conjunction with the accompanying drawings.

[0044] In the description of this application: Unless otherwise specified, "a plurality of" means two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects being referred to, and do not have any special meaning in terms of technical connotations (for example, they should not be understood as emphasizing importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0045] In this application, terms such as "upper", "lower", "left", "right", "middle", etc. are usually used to facilitate intuitive understanding with reference to the drawings, and are not absolute limitations on the positional relationships in the actual product. Without departing from the technical concept disclosed in this application, changes in these relative positional relationships should also be regarded as falling within the scope of the description of this application.

[0046] This application provides an EGR cooler spot welding device to solve the problems of large cumulative errors and low efficiency in the welding process of the EGR cooler at the present stage.

[0047] See Figure 1 , the EGR cooler spot welding device provided by this application includes a main body frame 1, and clamping stations corresponding to the workpieces to be welded are formed on the main body frame 1, and there are multiple clamping stations.

[0048] A base 2 is installed on the main body frame 1, and a horizontal rotation mechanism and a rotation limit mechanism are installed on the base 2; the horizontal rotation mechanism includes a rotation driving member, a rotation shaft 3 and a turntable 7 installed at one end of the rotation shaft 3, and the rotation shaft 3 drives the turntable 7 to rotate under the drive of the rotation driving member; the rotation limit mechanism includes one or more limit members, and the limit members are installed around the rotation shaft 3, and the limit members can be limit pins to realize the limit of the rotation angle of the rotation shaft. A vertical rotation mechanism, a vertical limit mechanism and a clamping mechanism are installed above the turntable 7; the vertical rotation mechanism includes a rotation shaft 10 and a handle 11 provided at one end of the rotation shaft 10, a clamping plate 14 is installed on the rotation shaft 10, and the clamping mechanism is arranged on the clamping plate 14; by turning the handle 11, the rotation shaft 10 rotates, and the vertical limit mechanism realizes the limit of the rotation angle of the rotation shaft 10. Multiple clamping stations are formed on the clamping plate 14, and the clamping mechanism realizes the clamping and fixing of the workpieces to be welded at the clamping stations. The EGR cooler spot welding device also includes a welding device for spot welding the workpieces to be welded at each clamping station.

[0049] The EGR cooler spot welding equipment provided by the present application centrally sets the welding points through a plurality of clamping stations that are centrally set, and the workpieces can be easily transferred between each other. The position conversion of the workpieces can be realized through a vertical rotation mechanism and a horizontal rotation mechanism, and then spot welding can be carried out in cooperation with the welding device to realize centralized spot welding of the various parts to be welded that constitute the EGR cooler. The workpieces can be easily transferred, and centralized spot welding can greatly improve the dimensional control accuracy, reduce the workpiece circulation time, and improve the processing efficiency.

[0050] In one embodiment, see Figure 4 The horizontal rotary mechanism of the EGR cooler spot welding device provided in the present application also includes a rotary seat adapted to be installed with the rotary shaft 3, a mounting hole is formed on the rotary seat, a rotary bearing 4 is adapted to be installed in the mounting hole, and the rotary shaft 3 is adapted to be connected with the rotary bearing 4. The rotary drive member includes a rotary drive motor, and the power output end of the rotary drive motor is connected with the rotary shaft 3. The power output end of the rotary drive motor and the rotary shaft 3 can be directly connected, or a power transmission route can be formed through an intermediate connecting member such as a coupling.

[0051] In one embodiment, see Figure 1 and Figure 4 The rotation limit mechanism includes a limit plate 5 provided on the base 2. The limit plate 5 is an annular structural member. The limit plate 5 is installed on the rotating shaft 3. A plurality of limit holes are evenly arranged on the limit plate 5. The plurality of limit holes are annularly distributed around the rotating shaft 3. A limit pin 6 is inserted in the limit hole. A plurality of limit sockets are provided on the surface of the turntable 7 facing the base 2. The plurality of limit sockets correspond to the plurality of limit holes one by one. One end of the limit pin 6 is inserted in the limit hole, and the other end is inserted in the limit socket. During the rotation of the rotating shaft 3, the limit pin 6 limits the rotation angle of the turntable 7.

[0052] In one embodiment, see Figure 1 Two support frames 8 are arranged on the turntable 7, and a bearing seat 9 is arranged at one end of the support frame 8 away from the turntable 7. Both ends of the rotating shaft 10 are respectively installed in the bearing seat 9. Referring to the figure, one end of the rotating shaft 10 passes through the bearing seat 9 and is connected to the handle 11. The vertical rotating mechanism also includes a slewing bearing installed in the bearing seat 9, the slewing bearing is embedded in the bearing seat 9, and the slewing bearing is adapted and connected to the rotating shaft 10.

[0053] In one embodiment, see Figure 1 and Figure 4, a rotary limit plate 12 is installed on a bearing seat 9 provided at one end of a rotary shaft 10 connected to a handle 11. The rotary limit plate 12 and the handle 11 are disposed on both sides of a support frame 8. A through hole allowing the rotary shaft 10 to pass through is provided on the rotary limit plate 12. A plurality of limit holes are uniformly distributed on the rotary limit plate 12. The plurality of limit holes are annularly arranged around the rotary shaft 10, and the limit holes are close to the edge of the rotary limit plate 12.

[0054] A plurality of jacks are provided on the bearing seat 9. The plurality of jacks correspond to the limit holes one by one. At least one limit hole and a corresponding jack are inserted with a limit pin 13. The limit pin 13 is used to limit the rotation angle of the clamping plate 14.

[0055] In one embodiment, rotary limit plates are provided on the bearing seats of both support frames.

[0056] In one embodiment, refer to Figure 4 , the clamping plate 14 is parallel to and relatively spaced from the turntable 7, and the clamping plate 14 is located between the two support frames 8.

[0057] In one embodiment, the workpiece to be welded includes a diffuser, a collector, a tube shell, a water pipe and a bracket. Correspondingly, a diffuser clamping station, a collector clamping station, a tube shell clamping station, a water pipe clamping station and a bracket clamping station are formed on the clamping plate 14. Positioning pin holes are provided on each clamping station, and the pin holes are adaptively connected with pins.

[0058] In one embodiment, the clamping mechanism clamps and positions the workpiece to be welded at each clamping station. The clamping mechanism is used to push the water pipe to be welded at the water pipe clamping station to a positioning surface.

[0059] In one embodiment, the clamping mechanism includes a first clamping assembly and a second clamping assembly provided on the clamping plate 14. The first clamping assembly and the second clamping assembly are oppositely disposed on both sides of the clamping plate 14. Refer to Figure 1, the first clamping assembly is arranged on the upper plate surface of the clamping plate 14. The first clamping assembly includes a first clamping plate 15. On one side plate surface of the first clamping plate 15, two support columns 16 are oppositely arranged. A connecting plate 17 is connected to the two support columns 16. The connecting plate 17 is oppositely arranged with the first clamping plate 15. On the connecting plate 17, two connecting rods 18 are oppositely arranged. One end of the connecting rod 18 penetrates through the connecting plate 17 and is connected to the first clamping plate 15, and the other end is connected with a rod-shaped structural member. A through hole is also formed on the connecting plate 17. A bearing is installed in the through hole. A clamping rod 19 is adaptively installed on the bearing. The clamping rod 19 penetrates through the bearing hole on the bearing and abuts against the first clamping plate 15. A jack is formed on the first clamping plate 15, and the clamping rod 19 is correspondingly inserted into the jack. A runner 20 is installed at the end of the clamping rod 19 away from the first clamping plate 15. An installation hole is formed at the central position of the runner 20, and the clamping rod 19 is installed in the installation hole. Three support rods are arranged on the runner 20. The three support rods are located on the same plane and form an included angle of 120° with each other.

[0060] In one embodiment, referring to Figure 3 and Figure 4 , the second clamping assembly is arranged below the clamping plate 14. The second clamping assembly includes a limiting member 24, a second clamping member 21 and a second clamping rod 23 connected to the second clamping member 21. The second clamping member 21 is of a cylindrical structure. The second clamping member 21 is sleeved on the limiting member 24. The limiting member 24 is installed below the clamping plate 14. A through groove allowing the second clamping member 21 to pass through is formed on the limiting member 24. An installation hole is formed on the side of the second clamping member 21 away from the clamping plate 14. A nut 22 is arranged in the installation hole. One end of the second clamping rod 23 passes through the nut 22 and is connected to the limiting member 24. The other end of the second clamping rod 23 is provided with a slender rod member. The second clamping rod 23 is in threaded cooperation with the nut 22. When the slender rod member is rotated, the second clamping member 21 slides up and down along the central axis of the second clamping rod 23 under the drive of the nut 22, so that the distance between the second clamping member 21 and the limiting member gradually increases or gradually decreases.

[0061] In one embodiment, the welding device is arranged around the body frame 1. The welding device includes a welding robot. The welding robot has a welding arm and a driving structure for driving the welding arm to move. The welding arm is driven to move to the clamping station and perform corresponding spot welding on the workpiece to be welded at the clamping station.

[0062] The welding device of the EGR cooler spot welding equipment provided by this application can be a robot for assisting welding. By cooperating with this welding robot for welding, the efficiency can be further improved. After testing, with the assistance of the auxiliary robot, the spot welding efficiency of the spot welding equipment provided by this application is 8 to 9 times that of the traditional spot welding with three sets of spot welding tooling. When manually spot welding by welders, after testing, the spot welding efficiency of the spot welding equipment provided by this application is 1.5 to 2 times that of the traditional spot welding with three sets of spot welding tooling.

[0063] In one embodiment, the workpiece to be welded further includes a baffle plate. Correspondingly, a baffle plate clamping station is formed on the clamping plate. The EGR cooler spot welding equipment provided by this application can quickly and accurately position the baffle plate and the shell, and cooperate with resistance welding to realize the welding of the shell and the baffle plate, greatly increasing the welding dimensional accuracy and stability, improving the efficiency of the baffle plate installation process, and realizing the centralized batch welding and installation of the baffle plate and the shell.

[0064] The EGR cooler spot welding equipment provided by this application realizes the centralization, high efficiency, and dimensional accuracy of the EGR cooler welding and installation process. Further, the EGR cooler spot welding equipment provided by this application can effectively utilize the existing MIG robot workstation to realize the automation and high efficiency of welding. Furthermore, the EGR cooler spot welding equipment provided by this application can realize the full-position transformation of the workpiece during the welding and installation process, providing hardware support for robot welding. At the same time, by installing this spot welding equipment on the existing workstation turntable, it can be perfectly matched with the robot workstation, thereby realizing the automation of the EGR cooler welding and installation, and greatly improving the welding and installation efficiency and consistency of the cooler.

[0065] When using the EGR cooler spot welding equipment provided by this application to weld the workpiece to be welded, first place the diffuser, collector, shell, water pipe, and bracket on the corresponding clamping stations of the spot welding equipment respectively, and position them through pin holes; then sequentially clamp the workpieces on each clamping station through the clamping mechanism, and push the water pipe to be welded on the water pipe clamping station to the positioning surface; then perform tack welding. First, spot weld the positions of the collector and the diffuser to determine the reference of the EGR cooler. The spot welding equipment provided by this application reserves the space for the welding torch; then, through the vertical rotation mechanism and horizontal slewing mechanism of the spot welding equipment, the full-position adjustment of the clamping station during the spot welding process is realized, making the welding and installation process more in line with the processing sequence, more convenient to operate, and higher in processing efficiency.

[0066] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope described in this specification.

[0067] In the foregoing, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can also be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained from these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. An EGR cooler spot welding device, characterized in that, It includes a main body frame, on which clamping stations corresponding to the workpieces to be welded are formed, and there are multiple such clamping stations; A base is installed on the main body frame, and a horizontal rotation mechanism and a rotation limit mechanism are installed on the base; the horizontal rotation mechanism includes a rotation driving member, a rotation shaft and a turntable installed at one end of the rotation shaft, and the rotation shaft drives the turntable to rotate under the drive of the rotation driving member; the rotation limit mechanism is used to limit the rotation angle of the rotation shaft; Above the turntable, a vertical rotation mechanism, a vertical limit mechanism and a clamping mechanism are installed; the vertical rotation mechanism includes a rotation shaft and a handle provided at one end of the rotation shaft, a clamping plate is installed on the rotation shaft, and the clamping mechanism is arranged on the clamping plate; by turning the handle, the rotation shaft rotates, and the vertical limit mechanism limits the rotation angle of the rotation shaft; Multiple clamping stations are formed on the clamping plate, and the clamping mechanism clamps and fixes the workpieces to be welded on the clamping stations; It also includes a welding device, which is used to spot-weld the workpieces to be welded on each clamping station; The rotation limit mechanism includes a limit disk arranged on the base. The limit disk is an annular structural member, the limit disk is installed on the rotation shaft, a plurality of limit holes are evenly arranged on the limit disk, and the plurality of limit holes are annularly distributed around the rotation shaft, and limit pins are inserted into the limit holes; On the surface of the turntable facing the base, a plurality of limit connection jacks are provided, and the plurality of limit connection jacks correspond to the plurality of limit holes one by one. One end of the limit pin is inserted into the limit hole, and the other end is inserted into the limit connection jack; The clamping mechanism includes a first clamping assembly and a second clamping assembly arranged on the clamping plate, and the first clamping assembly and the second clamping assembly are oppositely arranged on both sides of the clamping plate; The first clamping assembly is arranged on the upper plate surface of the clamping plate. The first clamping assembly includes a first clamping plate. On one side plate surface of the first clamping plate, two support columns are oppositely arranged, and a connecting plate is connected to the two support columns. The connecting plate is arranged opposite to the first clamping plate; Two connecting rods are oppositely arranged on the connecting plate. One end of the connecting rod passes through the connecting plate and is connected to the first clamping plate, and the other end is connected to a rod-shaped structural member; A through hole is also opened on the connecting plate, a bearing is installed in the through hole, a clamping rod is adaptively installed on the bearing, the clamping rod passes through the bearing hole on the bearing and is connected to the first clamping plate, and a connection jack is opened on the first clamping plate, and the clamping rod is correspondingly inserted into the connection jack; A runner is installed at the end of the clamping rod facing away from the first clamping plate. An installation hole is opened at the center position of the runner, the clamping rod is installed in the installation hole, and three support rods are arranged on the runner. The three support rods are in the same plane and form an angle of 120° with each other; The second clamping assembly is arranged below the clamping plate. The second clamping assembly includes a limiting member, a second clamping member, and a second clamping rod connected to the second clamping member. The second clamping member is of a cylindrical structure. The second clamping member is sleeved on the limiting member. The limiting member is installed below the clamping plate. A through groove allowing the second clamping member to pass through is formed on the limiting member. An installation hole is formed on one side of the second clamping member facing away from the clamping plate, and a nut is arranged in the installation hole. One end of the second clamping rod passes through the nut and is connected to the limiting member, and the other end is provided with a slender rod. The second clamping rod is in threaded cooperation with the nut. When the slender rod is rotated, the second clamping member slides up and down along the central axis of the second clamping rod under the drive of the nut.

2. The EGR cooler spot welding device according to claim 1, wherein The horizontal rotation mechanism further includes a rotary seat adaptively installed with the rotary shaft. An installation hole is formed on the rotary seat, and a rotary bearing is adaptively installed in the installation hole. The rotary shaft is adaptively connected to the rotary bearing. The rotary driving member includes a rotary driving motor, and the power output end of the rotary driving motor is connected to the rotary shaft.

3. The EGR cooler spot welding equipment according to claim 1, characterized in that Two support frames are oppositely arranged on the turntable. A bearing seat is arranged at one end of the support frame facing away from the turntable, and both ends of the rotating shaft are respectively installed in the bearing seats. One end of the rotating shaft passes through the bearing seat and is connected to the handle. The clamping plate is parallel to the turntable and is arranged at a relative interval. The clamping plate is located between the two support frames.

4. The EGR cooler spot welding equipment according to claim 3, characterized in that, The vertical rotation mechanism further includes a rotary bearing installed in the bearing seat. The rotary bearing is embedded in the bearing seat and is adaptively connected to the rotating shaft. A rotary limit plate is installed on the bearing seat close to the handle. The rotary limit plate and the handle are oppositely arranged on both sides of the support frame. A through hole allowing the rotating shaft to pass through is formed on the rotary limit plate. A plurality of limit holes are evenly distributed on the rotary limit plate and are arranged in a ring around the rotating shaft. The limit holes are close to the edge of the rotary limit plate.

5. The EGR cooler spot welding equipment according to claim 4, wherein, A plurality of jacks are arranged on the bearing seat close to the handle. The plurality of jacks correspond to the limit holes one by one. A limit pin is inserted into one limit hole and its corresponding jack, and the limit pin is used to limit the rotation angle of the clamping plate.

6. The EGR cooler spot welding equipment according to claim 1, characterized in that, The workpiece to be welded includes a diffuser, a collector, a tube shell, a water pipe, and a bracket. Diffuser clamping stations, collector clamping stations, tube shell clamping stations, water pipe clamping stations, and bracket clamping stations are formed on the clamping plate. Pin holes for positioning are arranged on each clamping station, and the pin holes are adaptively connected to pins. The clamping mechanism clamps and positions the workpiece to be welded at each clamping station, and the clamping mechanism is used to push the workpiece to be welded on the water pipe clamping station to the positioning surface.

7. The EGR cooler spot welding equipment according to claim 1, characterized in that, The welding device is arranged around the body frame. The welding device includes a welding robot. The welding robot has a welding arm and a driving structure for driving the welding arm to move. The welding arm is driven to move to the clamping station and perform corresponding spot welding on the workpiece to be welded at the clamping station.

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