A kind of automobile exhaust pipe mixer processing device and processing method

Abstract

The present invention discloses a processing device and a processing method for an automobile exhaust pipe mixer, which is used for winding, fixing and welding an inner cylinder and a corrugated plate of the mixer, wherein one end of the inner cylinder has a U-shaped groove, and is characterized in that it comprises a laser welding gun, a rough fixing device and a welding processing device; the rough fixing device comprises: a first bottom plate, on which are arranged two sets of mutually parallel first positioning disk slide rails, and a set of first positioning sleeve slide rails, wherein the first positioning sleeve slide rails are perpendicular to the first positioning disk slide rails. The present invention realizes high-efficiency, high-precision clamping, positioning and welding of the mixer, the mixer will not be deformed during the welding process, and the product qualification rate is high.

Description

Technical Field

[0001] The present invention relates to the field of automobile exhaust system-mixer parts processing, and more specifically, to an automobile exhaust pipe mixer processing device and a processing method. Background Art

[0002] In recent years, with the rapid development of automotive industry automation, the requirements for product functions, processing technology, precision, and production efficiency are getting higher and higher; in order to meet the requirements of processing technology precision, production efficiency, and ease of operation in work and production, the quick clamping device has gradually become a research hotspot in the field of automation in various countries due to its easy operation, synchronous clamping, reliable clamping, and prevention of laser welding deformation.

[0003] The existing clamping devices are generally positioned by overall rigidity. This clamping method cannot meet the product processing technology, positioning accuracy, and product production efficiency for products that require multi-point clamping, have many welds, and have high precision. Summary of the invention

[0004] The purpose of the present invention is to provide a processing device and a processing method for an automobile exhaust pipe mixer, which realizes high-efficiency, high-precision clamping, positioning and welding of the mixer. The mixer will not deform during the welding process, and the product qualification rate is high.

[0005] The technical solution adopted by the present invention to solve this technical problem is: a processing device for automobile exhaust pipe mixer, used for winding, fixing and welding the inner cylinder and corrugated plate of the mixer, one end of the inner cylinder has a U-shaped groove, including a laser welding gun, a rough fixing device and a welding processing device;

[0006] The rough fixing device comprises:

[0007] A first bottom plate, on which are disposed two sets of mutually parallel first positioning disk slide rails and one set of first positioning sleeve slide rails, wherein the first positioning sleeve slide rails are perpendicular to the first positioning disk slide rails;

[0008] A pair of positioning plates with through holes are detachably mounted on the first positioning plate slide rail through a positioning plate seat, the positioning plates are connected to the positioning plate seat through a bearing, the through holes on the pair of positioning plates are coaxially arranged, and the inner sleeve of the mixer can be inserted into the through holes, and fin plates are relatively arranged on the outer periphery of the through holes of the pair of positioning plates, the fin plates are composed of a plurality of fins, and the plurality of fins are equidistantly and detachably arranged on the outer periphery of the through holes, and the outer periphery size of the fins is slightly smaller than the corresponding pores at the crest of the corrugated plate, and the pair of positioning plates are relatively provided with supporting holes, and the supporting holes replace the mounting holes of one group of fins; one of the positioning plates has a U-shaped block, which matches the U-shaped groove;

[0009] A positioning strut, the middle portion of which matches the shape of the pores corresponding to the crests of the corrugated plate;

[0010] The positioning sleeve is a hollow cylindrical structure, and the inner wall of the positioning sleeve is provided with a plurality of clips at equal intervals along the circumferential direction. The inner diameter of the positioning cylinder is equal to or greater than the outer diameter of the mixer, and the clips can be inserted into the pores corresponding to the bottom of the corrugated plate and fit with its inner wall; the second positioning sleeve slide rail is slidably installed on the first positioning sleeve slide rail, the positioning sleeve is connected to the sleeve seat through a bearing, the sleeve seat is slidably arranged on the second positioning sleeve slide rail, and the second positioning sleeve slide rail is arranged parallel to the first positioning plate slide rail;

[0011] Two groups of first welding positioning assemblies, the first welding positioning assemblies include a first transverse slide, a first longitudinal slide, a first vertical slide and a first positioning member, the first longitudinal slide is arranged on the first bottom plate, the first transverse slide can be slidably arranged on the first longitudinal slide, the first transverse slide is located on one side between a pair of positioning plates, the first vertical slide is installed on the slide seat of the first transverse slide, the first positioning member includes a first positioning support and a pair of first positioning pressure plates, the first positioning support is fixed on the slide seat of the vertical slide, a pair of legs are extended downward from the lower end of the first positioning support, the first positioning pressure plate is fixed on the legs, the axis of the first positioning pressure plate is perpendicular to the axis of the through hole, the first positioning pressure plate includes a pair of circular discs and a connecting shaft connecting the pair of circular discs, the pair of circular discs can penetrate into the gaps corresponding to two adjacent wave bottoms of the corrugated plate, the connecting shaft can be pressed on the trough between the two wave bottoms, and the spacing between the pair of first positioning pressure plates is set to allow the welding head of the laser welding gun to penetrate;

[0012] A rotating assembly, comprising a second slide rail, a cylinder fixing member, a cylinder fixing seat, a worm gear, a worm shaft and a servo motor, wherein the cylinder fixing member is connected to the cylinder fixing seat via a bearing, the cylinder fixing seat is slidably fixed on the second slide rail, the worm gear is sleeved on the cylinder fixing member, the worm gear is meshed with the worm shaft, the worm shaft is connected to the servo motor, the outer diameter of the cylinder fixing member is equal to or slightly smaller than the inner diameter of the inner cylinder, and the cylinder fixing member is coaxially arranged with the positioning plate;

[0013] The welding processing device comprises:

[0014] A second bottom plate, on which are disposed two sets of second positioning plate slide rails which are parallel to each other and are used for mounting the positioning plate;

[0015] The second welding positioning assembly comprises a second longitudinal slide, a second transverse slide, a second vertical slide and a second positioning member, the second longitudinal slide is arranged on the second bottom plate, the second transverse slide can be slidably arranged on the second longitudinal slide, the second transverse slide is located on one side of the second positioning plate slide rail, and the second vertical slide is installed on the slide seat of the second transverse slide, the second positioning member comprises a second positioning support and a pair of second positioning pressure plates, the second positioning support is fixed on the slide seat of the second vertical slide, a pair of legs are extended downward from the lower end of the second positioning support, the second positioning pressure plate can be rotatably fixed on the legs, the thickness of the second positioning pressure plate gradually decreases from the center to the two ends, the thickness of the center of the second positioning pressure plate is greater than the width of the gap at the bottom of the corrugated plate, the second positioning pressure plate can be penetrated and loaded on the bottom of the corrugated plate, the axis of the second positioning pressure plate is perpendicular to the sliding direction of the second positioning plate slide rail, and the spacing between the pair of positioning pressure plates is set to allow the welding head of the laser welding gun to penetrate;

[0016] The expansion and contraction fixing mechanism comprises a first slide rail, an expansion and contraction fixing piece, a slider assembly and a slider driver; the expansion and contraction fixing piece is a hollow cylindrical structure, and its outer diameter is less than or equal to the inner diameter of the inner cylinder, the inner cylinder can be penetrated on the expansion and contraction fixing piece, and the expansion and contraction fixing piece is provided with a plurality of long strip through holes at equal intervals along the circumferential direction; the slider assembly is composed of a plurality of sliders, and a plurality of sliders are penetrated in the expansion and contraction fixing piece at equal intervals along the circumferential direction and pass through the long strip through holes, and a plurality of sliders can be slidably buckled on the slider driver, the slider driver is a conical structure and the diameter of one end facing the positioning plate is smaller than the diameter of the other end thereof, the other end of the slider driver is connected to the cylinder, and the cylinder drives the slider driver to move toward the positioning plate to push the slider, the expansion and contraction fixing piece is fixed on a pair of expansion and contraction fixing seats through bearings, and a pair of expansion and contraction fixing seats can be slidably fixed on the first slide rail, the first slide rail is fixed on the second bottom plate, a worm wheel is coaxially fixed on the expansion and contraction fixing piece, the worm wheel is meshed with a worm, and the worm is connected to a servo motor.

[0017] Preferably, an auxiliary positioning mechanism is also included, which includes:

[0018] a pair of auxiliary slide rails, which are arranged oppositely on the second bottom plate and located on both sides of the mixer;

[0019] A pair of auxiliary positioning members, whose bottoms are slidably arranged on the auxiliary slide rails and whose upper parts are semicircular arc-shaped, are assembled together into a circular ring with an inner diameter equal to the outer diameter of the inner cylinder, and the upper width of the auxiliary positioning members is equal to the distance between the end of the inner cylinder and the end of the corrugated plate on that side.

[0020] Preferably, the width of the fin is equal to or slightly smaller than the width of the pores at the crest of the corrugated plate.

[0021] Preferably, it further comprises a supporting guide rod, which is coaxially arranged on the second bottom plate on the side of the positioning plate away from the side of the expansion and contraction fixing mechanism, and one end of the supporting guide rod penetrates into the positioning plate.

[0022] Preferably, the slider is a hollow structure, one end of which has a water inlet and a water outlet, the water inlet is connected to the water inlet pipe, and the water outlet is connected to the water outlet pipe.

[0023] The present invention also provides a mixer processing method using the device, comprising the following steps:

[0024] Step 1: insert the positioning sleeve onto the fin plate of one of the positioning plates, then insert the two ends of the inner cylinder wrapped with the corrugated plate into the positioning plates of the rough fixing device, and fix the U-shaped block and the U-shaped groove by clamping, and insert a pair of fin plates into the gaps corresponding to the crests at both ends of the corrugated plate, and fix them by pressing through the first positioning pressure plate; insert the positioning support rod into the gaps corresponding to the crests formed by the first and last corrugated plates, and drive the cylinder fixing piece through the second slide rail to penetrate into the inner cylinder for support;

[0025] Wherein, a first positioning plate of a first welding positioning assembly is pressed on the end of the mixer corrugated plate, and another first positioning plate of a first welding positioning assembly is pressed on the front end of the mixer corrugated plate, and the welding head of the laser welding gun is placed between the pair of first positioning plates;

[0026] Step 2: Move the positioning sleeve to be adjacent to the laser welding gun, and synchronously move the positioning sleeve, the laser welding gun and the first welding positioning assembly at the front end, start welding arc, and complete the end-to-end connection of the corrugated plate;

[0027] Step 3: remove the positioning support rod, replace the first positioning pressure plate of the first welding positioning assembly with the second positioning pressure plate, drive the inner cylinder to rotate a certain angle through the worm gear of the rotating assembly, move the positioning sleeve to be adjacent to the laser welding gun, and press the second positioning pressure plate on the first and last ends of the wave bottom to be welded, synchronously move the positioning sleeve, the laser welding gun and the first welding positioning assembly at the front end, start the welding arc, complete the welding of the corrugated plate wave bottom, and complete the welding of the corrugated plate opposite wave bottom, and weld several wave bottoms at intervals along the circumference of the corrugated plate in this way;

[0028] Step 3: Release the pressure of the first welding positioning assembly, remove the positioning sleeve, and synchronously transfer and fix the pair of positioning plates and the mixer to the second positioning plate slide rail of the welding processing device;

[0029] Step 4: drive the first slide rail to make the expansion and contraction fixture penetrate into the inner cylinder of the mixer, drive the slider driver to push the slider to support the inner wall of the inner cylinder of the mixer, turn on the servo motor to make the worm gear drive the expansion and contraction fixture to rotate the set angle, turn on the second welding positioning assembly, press the second positioning pressure plate on the first and last ends of the corrugated plate to be welded, and place the welding head of the laser welding gun between a pair of second positioning plates, synchronously move the positioning sleeve, the laser welding gun and a pair of second positioning plates, start the welding arc, and complete the welding of the corrugated plate wave bottom;

[0030] Step 5: Use the worm gear to drive the expansion and contraction fixture to rotate 180° to complete the welding of the corrugated plate to the wave bottom, continue to rotate the mixer 90° to weld, and then rotate it 180° to weld, always ensuring a symmetrical welding until the welding of all the wave bottoms is completed.

[0031] Preferably, in step 4, the first slide rail drives the expansion and contraction fixing member to penetrate into the inner cylinder of the mixer and penetrate into the supporting guide rod for fixing.

[0032] Preferably, in step 4, cooling water is introduced into the slider during the welding process.

[0033] The present invention has at least the following beneficial effects:

[0034] 1. It can realize multi-point synchronous and rapid clamping of parts, reduce clamping time and improve production efficiency. Specifically: using conventional clamping devices for welding, each shift (8h / 200pcs), using this clamping device and process, each shift (8h / 800pcs), the output doubles;

[0035] 2. Quality improvement:

[0036] When using conventional clamping devices, the synchronization during loading is poor and the welding deformation is large, which makes it impossible to assemble the parts welded in the previous process with the subsequent parts. This device can solve the above problems.

[0037] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the mixer structure;

[0039] Figure 2 is a schematic diagram of the structure of the rough fixing device;

[0040] Figure 3 It is the installation diagram of the positioning plate and the mixer;

[0041] Figure 4 is a schematic diagram of the installation of the positioning sleeve on the mixer;

[0042] Figure 5 is a schematic diagram of the first positioning platen being installed on the mixer;

[0043] Figure 6 It is a schematic diagram of the installation of the positioning support rod;

[0044] Figure 7 It is an exploded view of the welding process device;

[0045] Figure 8 It is the assembly drawing of the welding processing device;

[0046] Fig. 9 This is a detailed view of the mixer welding;

[0047] Fig.10 is a schematic diagram of a second welding positioning assembly;

[0048] Fig.11 It is an enlarged schematic diagram of a processing device for an automobile exhaust pipe mixer;

[0049] Fig.12 It is a schematic diagram of the expansion and contraction fixture.

[0050] Description of reference numerals: 1 corrugated plate, 2 inner cylinder, 3 mixer, 4 second bottom plate, 5 laser welding gun, 6 positioning plate, 7 fin plate, 8 second transverse slide, 9 second vertical slide, 10 second positioning pressure plate, 11 second positioning support, 12 first slide rail, 13 expansion and contraction fixing member, 14 slider, 15 slider driver, 16 long strip perforation, 17 convex block, 18 slot, 19 cylinder, 20 expansion and contraction fixing seat, 21 worm gear, 22 second positioning plate slide rail, 23 second longitudinal Slide, 24 auxiliary slide rail, 25 auxiliary positioning member, 26 shell, 27 support guide rod, 28 first base plate, 29 first positioning disk slide rail, 30 first positioning sleeve slide rail, 31 bearing, 32 positioning support rod, 33 positioning sleeve, 34 cylinder fixing seat, 35 clamping strip, 36 second positioning sleeve slide rail, 37 first transverse slide, 38 first longitudinal slide, 39 first vertical slide, 40 support leg, 41 disk, 42 ​​connecting shaft, 43 second slide rail, 44 cylinder fixing member. DETAILED DESCRIPTION

[0051] The present invention is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly pointed out that the technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other without conflict.

[0052] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0053] The present invention is further described in detail below in conjunction with the accompanying drawings and implementations, and its specific implementation process is as follows:

[0054] The structure of the automobile mixer is as follows Figure 1 As shown, it consists of two parts, including a coaxially arranged inner cylinder and a steel corrugated plate arranged outside the steel inner cylinder. The corrugated plate is wound outside the inner cylinder. The corrugated plate is 441 stainless steel, with a thickness of 0.2mm, a peak width of 1.2mm, a trough width of 1.9mm, and a wave depth of 1.5mm. The mixer of this application needs to complete the welding of 135 welds, and at the same time, it is necessary to ensure that the inner cylinder does not deform during the welding process, otherwise the mixer will be directly scrapped during welding.

[0055] like Figures 1 to 12 As shown, the present invention provides a processing device for an automobile exhaust pipe mixer 3, which is used for winding, fixing and welding an inner cylinder 2 and a corrugated plate 1 of the mixer 3, wherein one end of the inner cylinder 2 has a U-shaped groove, and comprises a laser welding gun 5, a rough fixing device and a welding processing device;

[0056] The rough fixing device comprises:

[0057] A first bottom plate 28, on which are disposed two sets of mutually parallel first positioning disk slide rails 29 and a set of first positioning sleeve slide rails 30, wherein the first positioning sleeve slide rails 30 are perpendicular to the first positioning disk slide rails 29;

[0058] A pair of positioning disks 6 with through holes are detachably mounted on the first positioning disk slide rail 29 through the positioning disk 6 seat, the positioning disk 6 is connected to the positioning disk 6 seat through a bearing 31, the through holes on the pair of positioning disks 6 are coaxially arranged, and the inner sleeve of the mixer 3 can be inserted into the through holes, and the outer periphery of the through holes of the pair of positioning disks 6 is relatively provided with fin disks 7, the fin disks 7 are composed of a plurality of fins, and the plurality of fins are equidistantly and detachably arranged on the outer periphery of the through holes, the outer periphery size of the fins is slightly smaller than the corresponding pores at the crest of the corrugated plate 1, the fins are used to penetrate the corresponding pores at the crest of one end of the corrugated plate 1 for shaping, supporting and fixing the corrugated plate 1, and the pair of positioning disks 6 are relatively provided with supporting holes, and the supporting holes replace the mounting holes of one group of fins; one of the positioning disks 6 has a U-shaped block, which matches the U-shaped groove to limit the inner cylinder 2;

[0059] The positioning support rod 32 has wedge-shaped ends, and the middle part thereof matches the shape of the pores corresponding to the crests of the corrugated plate 1, so as to ensure that the two side surfaces and one top surface of the corresponding pores at the crests of the corrugated plate 1 of the positioning support rod 32 are in contact with each other;

[0060] The positioning sleeve 33 is a hollow cylindrical structure. The inner wall of the positioning sleeve 33 is provided with a plurality of clips 35 at equal intervals along the circumferential direction. The inner diameter of the positioning cylinder is equal to or greater than the outer diameter of the mixer 3. The clips 35 can be inserted into the pores corresponding to the bottom of the corrugated plate 1 and fit with its inner wall. The first positioning sleeve slide rail 30 is slidably provided with a second positioning sleeve slide rail 36. The positioning sleeve 33 is connected to the sleeve seat through a bearing. The sleeve seat is slidably provided on the second positioning sleeve slide rail 36. The second positioning sleeve slide rail 36 is provided parallel to the first positioning plate slide rail 29.

[0061] Two groups of first welding positioning components, the first welding positioning components include a first transverse slide 37, a first longitudinal slide 38, a first vertical slide 39 and a first positioning member, the first longitudinal slide 38 is arranged on the first bottom plate 28, the first transverse slide 37 is slidably arranged on the first longitudinal slide 38, the first transverse slide 37 is located on one side between a pair of positioning plates 6, the first vertical slide 39 is installed on the slide seat of the first transverse slide 37, the first positioning member includes a first positioning support and a pair of first positioning pressure plates, the first positioning support is fixed on the slide seat of the vertical slide, a pair of legs 40 are extended downward from the lower end of the first positioning support, the first positioning pressure plate is fixed on the legs 40, the The axis of the first positioning pressure plate is perpendicular to the axis of the through hole. The first positioning pressure plate includes a pair of discs 41 and a connecting shaft 42 connecting the pair of discs 41. The pair of discs 41 can penetrate into the pores corresponding to two adjacent wave bottoms of the corrugated plate 1, and the connecting shaft 42 can be pressed on the trough between the two wave bottoms. The spacing between the pair of first positioning pressure plates is set to allow the welding head of the laser welding gun 5 to penetrate; the first transverse slides 37 of the two groups of first welding positioning assemblies are respectively located on both sides between the pair of positioning discs 6 without interfering with each other. One group of welding positioning assemblies moves from the head of the mixer 3 to the tail of the mixer 3 with the laser welding gun 5, and the positioning disc 6 of the other group of welding positioning assemblies is pressed at the end of the mixer 3 to ensure the balance of the corrugated plate 1 at both ends of the inner cylinder 2;

[0062] A rotating assembly, which includes a second slide rail 43, a cylinder fixing member 44, a cylinder fixing seat 34, a worm wheel 21, a worm rod and a servo motor. The cylinder fixing member 44 is connected to the cylinder fixing seat 34 through a bearing. The cylinder fixing seat 34 is slidably fixed on the second slide rail 43. The worm wheel 21 is sleeved on the cylinder fixing member 44. The worm wheel 21 is meshed with the worm rod. The worm rod is connected to the servo motor. The servo motor is installed on the cylinder fixing seat 34. The outer diameter of the cylinder fixing member 44 is equal to or slightly smaller than the inner diameter of the inner cylinder 2. The cylinder fixing member 44 is coaxially arranged with the positioning plate 6.

[0063] The welding processing device comprises:

[0064] The second bottom plate 4 is provided with two sets of second positioning plate slide rails 22 which are parallel to each other and are used to install the positioning plate 6; after the mixer 3 of the rough fixing device completes the winding and welding of the corrugated plate 1, it needs to be installed on the second positioning plate slide rails 22 together with the positioning plate 6 to complete the next process;

[0065] The second welding positioning assembly includes a second longitudinal slide 23, a second transverse slide 8, a second vertical slide 9 and a second positioning member, wherein the second longitudinal slide 23 is arranged on the second bottom plate 4, the second transverse slide 8 is slidably arranged on the second longitudinal slide 23, the second transverse slide 8 is located on one side of the second positioning plate slide rail 22, the second vertical slide 9 is installed on the slide seat of the second transverse slide 8, the second positioning member includes a second positioning support 11 and a pair of second positioning pressure plates 10, the second positioning support 11 is fixed on the slide seat of the second vertical slide 9 ... member includes a second positioning support 11 and a pair of second positioning pressure plates 10, the second positioning support 11 is fixed on the slide seat of the second vertical slide 9, the second positioning member includes a second positioning A pair of legs are extended downward from the lower end of the second positioning support 11, and the second positioning pressure plate 10 is rotatably fixed on the legs. The thickness of the second positioning pressure plate 10 gradually decreases from the center to both ends. The thickness of the center of the second positioning pressure plate 10 is greater than the width of the gap at the bottom of the corrugated plate 1 by 1.5-2mm, which ensures the effectiveness of welding. The second positioning pressure plate 10 can be inserted into the bottom of the corrugated plate 1 for pressure loading. The axis of the second positioning pressure plate 10 is perpendicular to the sliding direction of the second positioning plate slide rail 22. The spacing between the pair of positioning pressure plates is set to allow the welding head of the laser welding gun 5 to penetrate;

[0066] The expansion and contraction fixing mechanism includes a first slide rail 12, an expansion and contraction fixing member 13, a slider 14 assembly and a slider driver 15; the expansion and contraction fixing member 13 is a hollow cylindrical structure, and its outer diameter is less than or equal to the inner diameter of the inner tube 2. The inner tube 2 can be inserted into the expansion and contraction fixing member 13, and the expansion and contraction fixing member 13 is provided with a plurality of long strip through holes 16 at equal intervals along the circumferential direction. The slider 14 assembly is composed of a plurality of sliders 14, and the plurality of sliders 14 are inserted into the expansion and contraction fixing member 13 at equal intervals along the circumferential direction and pass through the long strip through holes 16. The plurality of sliders 14 can be slidably buckled on the slider driver 15, and specifically, the surface of the slider 14 contacting the slider driver 15 has a convex block 1 7. The slider driver 15 has a card slot 18 for placing a card block. The slider driver 15 is a conical structure and the diameter of one end facing the positioning plate 6 is smaller than the diameter of the other end. The other end of the slider driver 15 is connected to the cylinder 19. The cylinder 19 drives the slider driver 15 to move toward the positioning plate 6 to push the slider 14. The shrinking and expanding fixing member 13 is fixed to a pair of shrinking and expanding fixing seats 20 through bearings. The pair of shrinking and expanding fixing seats 20 are slidably fixed to the first slide rail 12. The first slide rail 12 is fixed to the second bottom plate 4. A worm wheel 21 is coaxially fixed to the shrinking and expanding fixing member 13. The worm wheel 21 is meshed with a worm, and the worm is connected to a servo motor. The shrinking and expanding fixing seat 20 and the cylinder 19 are both arranged in a housing 26.

[0067] The technical solution may also include the following technical details to better achieve the technical effect: it also includes an auxiliary positioning mechanism, which includes:

[0068] a pair of auxiliary slide rails 24, which are oppositely arranged on the second bottom plate 4 and located on both sides of the mixer 3;

[0069] A pair of auxiliary positioning members 25, whose bottoms are slidably arranged on the auxiliary slide rails 24, and whose upper parts are semicircular arc-shaped, are assembled together to form a circular ring with an inner diameter equal to the outer diameter of the inner tube 2, and the upper width of the auxiliary positioning members 25 is equal to the distance between the end of the inner tube 2 and the end of the corrugated plate 1 on this side.

[0070] In the above technical solution, the welding of the mixer 3 requires high precision. After the mixer 3 to be welded is installed, the auxiliary positioning member 25 is driven by the auxiliary slide rail 24 to move until the auxiliary positioning member 25 is sleeved with the end of the mixer 3. If it fits perfectly, it means that the mixer 3 has no quality problems and can be welded. If there are gaps in the fit, it means that it is waste and there is no need to proceed to the next step. In addition, since the lengths of the inner cylinder 2 and the corrugated plate 1 are fixed, the auxiliary positioning mechanism of the present application only needs to be set up in one group to detect whether the corrugated plate 1 is installed in place on the inner cylinder 2.

[0071] The technical solution may also include the following technical details to better achieve the technical effect: the width of the fin is equal to or slightly smaller than the width of the pores at the crest of the corrugated plate 1 .

[0072] The technical solution may also include the following technical details to better achieve the technical effect: it also includes a support guide rod 27, which is coaxially arranged on the second bottom plate 4 on the side of the positioning plate 6 away from the side of the expansion and contraction fixing mechanism, and one end of the support guide rod 27 penetrates the positioning plate 6. When the expansion and contraction fixing member 13 moves toward the support guide rod 27, the expansion and contraction fixing member 13 penetrates the support guide rod 27 to achieve fixation.

[0073] The present technical solution may further include the following technical details to better achieve the technical effect: the slider 14 is a hollow structure, one end of which has a water inlet and a water outlet, the water inlet is connected to the water inlet pipe, and the water outlet is connected to the water outlet pipe.

[0074] The present invention also provides a method for processing the mixer 3 using the device, comprising the following steps:

[0075] Step 1, insert the positioning sleeve 33 on the fin disk 7 of one of the positioning disks 6, then insert the two ends of the inner cylinder 2 wrapped with the corrugated plate 1 into the positioning disk 6 of the rough fixing device, and fix the U-shaped block and the U-shaped groove by clamping, and a pair of fin disks 7 are inserted into the pores corresponding to the crests at both ends of the corrugated plate 1, and the corrugated plate 1 is evenly supported together, and finally pressed and fixed by the first positioning pressure plate, specifically: during pressing, one disc of the first positioning pressure plate is pressed on the wave bottom of the first end corrugated plate 1, and the other disc is pressed on the wave bottom of the end corrugated plate 1, and the connecting shaft is pressed on the crest formed at the connection between the head and tail ends of the corrugated plate 1, the length of the corrugated plate 1 is less than the length of the inner cylinder 2, and the two ends of the inner cylinder 2 are reserved for design positions; the positioning support rod 32 is inserted into the corresponding pores at the crests formed by the head and tail corrugated plates 1, and the cylinder fixing piece is driven by the second slide rail to penetrate into the inner cylinder 2 for support;

[0076] Among them, one set of first positioning plates 6 of the first welding positioning assembly is pressed on the end of the corrugated plate 1 of the mixer 3, and another set of first positioning plates 6 of the first welding positioning assembly is pressed on the front end of the corrugated plate 1 of the mixer 3, and the welding head of the laser welding gun 5 is placed between the pair of first positioning plates 6 to ensure the balance of the corrugated plate 1 at both ends of the inner cylinder 2 to prevent the rear end from expanding;

[0077] Step 2: Move the positioning sleeve 33 to be adjacent to the laser welding gun 5, and synchronously move the positioning sleeve 33, the laser welding gun 5 and the first welding positioning assembly at the front end, start welding arc, and complete the end-to-end connection of the corrugated plate 1;

[0078] Step 3, remove the positioning support rod 32, replace the first positioning pressure plate of the first welding positioning assembly with the second positioning pressure plate 10, drive the inner cylinder 2 to rotate a certain angle through the worm gear 21 of the rotating assembly, move the positioning sleeve 33 to be adjacent to the laser welding gun 5, and press the second positioning pressure plate 10 on the first and last ends of the wave bottom to be welded, synchronously move the positioning sleeve 33, the laser welding gun 5 and the first welding positioning assembly at the front end, start the welding arc, complete the welding of the wave bottom of the corrugated plate 1, and complete the welding of the opposite wave bottom of the corrugated plate 1, and weld several wave bottoms at intervals along the circumference of the corrugated plate 1 according to this method;

[0079] Step 3: Release the pressure of the first welding positioning assembly, remove the positioning sleeve 33, and synchronously transfer and fix the pair of positioning plates 6 and the mixer 3 to the second positioning plate slide rail 22 of the welding processing device;

[0080] Step 4: drive the first slide rail 12 to make the expansion and contraction fixture 13 penetrate into the inner cylinder 2 of the mixer 3, drive the slider driver 15 to push the slider 14 to support the inner wall of the inner cylinder 2 of the mixer 3, turn on the servo motor to make the worm gear 21 drive the expansion and contraction fixture 13 to rotate the set angle, turn on the second welding positioning assembly, press the second positioning pressure plate 10 on the two ends of the wave bottom to be welded on the corrugated plate 1, and place the welding head of the laser welding gun 5 between a pair of second positioning plates 6, synchronously move the positioning sleeve 33, the laser welding gun 5 and a pair of second positioning plates 6, start the welding arc, and complete the welding of the wave bottom of the corrugated plate 1;

[0081] Step 5: Use the worm gear 21 to drive the expansion and contraction fixture 13 to rotate 180° to complete the welding of the corrugated plate 1 to the wave bottom, continue to rotate the mixer 390° for welding, and then rotate it 180° for welding, always ensuring a symmetrical welding until the welding of all wave bottoms is completed.

[0082] The technical solution may also include the following technical details to better achieve the technical effect: in the step 4, the first slide rail 12 drives the expansion and contraction fixing member 13 to penetrate into the inner cylinder 2 of the mixer 3 and penetrate into the support guide rod 27 for fixing.

[0083] The technical solution may also include the following technical details to better achieve the technical effect: In step 4, cooling water is introduced into the slider 14 during the welding process.

[0084] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A processing device for automobile exhaust pipe mixer, used for winding, fixing and welding the inner cylinder and corrugated plate of the mixer, one end of the inner cylinder has a U-shaped groove, characterized in that: It includes a laser welding gun, a rough fixture and a welding processing device; The rough fixing device comprises: A first bottom plate, on which are disposed two sets of mutually parallel first positioning disk slide rails and one set of first positioning sleeve slide rails, wherein the first positioning sleeve slide rails are perpendicular to the first positioning disk slide rails; A pair of positioning plates with through holes are detachably mounted on the first positioning plate slide rail through a positioning plate seat, the positioning plates are connected to the positioning plate seat through a bearing, the through holes on the pair of positioning plates are coaxially arranged, and the inner cylinder of the mixer can be inserted into the through holes, and fin plates are relatively arranged on the outer periphery of the through holes of the pair of positioning plates, the fin plates are composed of a plurality of fins, and the plurality of fins are equidistantly and detachably arranged on the outer periphery of the through holes, and the outer periphery size of the fins is slightly smaller than the corresponding pores at the crest of the corrugated plate, and the pair of positioning plates are relatively provided with supporting holes, and the supporting holes replace the mounting holes of one group of fins; one of the positioning plates has a U-shaped block, which matches the U-shaped groove; A positioning strut, the middle portion of which matches the shape of the pores corresponding to the crests of the corrugated plate; The positioning sleeve is a hollow cylindrical structure, and a plurality of clips are arranged on the inner wall of the positioning sleeve at equal intervals along the circumferential direction. The inner diameter of the positioning sleeve is equal to or greater than the outer diameter of the mixer, and the clips can be inserted into the pores corresponding to the bottom of the corrugated plate and fit with the inner wall thereof; a second positioning sleeve slide rail is slidably mounted on the first positioning sleeve slide rail, the positioning sleeve is connected to the sleeve seat through a bearing, the sleeve seat is slidably arranged on the second positioning sleeve slide rail, and the second positioning sleeve slide rail is arranged parallel to the first positioning plate slide rail; Two groups of first welding positioning assemblies, the first welding positioning assemblies include a first transverse slide, a first longitudinal slide, a first vertical slide and a first positioning piece, the first longitudinal slide is arranged on the first bottom plate, the first transverse slide can be slidably arranged on the first longitudinal slide, the first transverse slide is located on one side between a pair of positioning plates, the first vertical slide is installed on the slide seat of the first transverse slide, the first positioning piece includes a first positioning support and a pair of first positioning pressure plates, the first positioning support is fixed on the slide seat of the first vertical slide, a pair of legs are extended downward from the lower end of the first positioning support, the first positioning pressure plate is fixed on the legs, the axis of the first positioning pressure plate is perpendicular to the axis of the through hole, the first positioning pressure plate includes a pair of circular discs and a connecting shaft connecting the pair of circular discs, the pair of circular discs can penetrate into the gaps corresponding to two adjacent wave bottoms of the corrugated plate, the connecting shaft can be pressed on the trough between the two wave bottoms, and the spacing between the pair of first positioning pressure plates is set to allow the welding head of the laser welding gun to penetrate; A rotating assembly, comprising a second slide rail, a cylinder fixing member, a cylinder fixing seat, a worm wheel, a worm and a servo motor, wherein the cylinder fixing member is connected to the cylinder fixing seat via a bearing, the cylinder fixing seat is slidably fixed on the second slide rail, the worm wheel is sleeved on the cylinder fixing member, the worm wheel is meshed with the worm, the worm is connected to the servo motor, the outer diameter of the cylinder fixing member is equal to or slightly smaller than the inner diameter of the inner cylinder, and the cylinder fixing member is coaxially arranged with the positioning plate; The welding processing device comprises: A second bottom plate, on which are disposed two sets of second positioning plate slide rails which are parallel to each other and are used for mounting the positioning plate; The second welding positioning assembly comprises a second longitudinal slide, a second transverse slide, a second vertical slide and a second positioning member, the second longitudinal slide is arranged on the second bottom plate, the second transverse slide can be slidably arranged on the second longitudinal slide, the second transverse slide is located on one side of the second positioning plate slide rail, and the second vertical slide is installed on the slide seat of the second transverse slide, the second positioning member comprises a second positioning support and a pair of second positioning pressure plates, the second positioning support is fixed on the slide seat of the second vertical slide, a pair of legs are extended downward from the lower end of the second positioning support, the second positioning pressure plate can be rotatably fixed on the legs, the thickness of the second positioning pressure plate gradually decreases from the center to the two ends, the thickness of the center of the second positioning pressure plate is greater than the width of the gap at the bottom of the corrugated plate, the second positioning pressure plate can be penetrated and loaded on the bottom of the corrugated plate, the axis of the second positioning pressure plate is perpendicular to the sliding direction of the second positioning plate slide rail, and the spacing between the pair of positioning pressure plates is set to allow the welding head of the laser welding gun to penetrate; The expansion and contraction fixing mechanism comprises a first slide rail, an expansion and contraction fixing piece, a slider assembly and a slider driver; the expansion and contraction fixing piece is a hollow cylindrical structure, and its outer diameter is less than or equal to the inner diameter of the inner cylinder, the inner cylinder can be penetrated on the expansion and contraction fixing piece, and the expansion and contraction fixing piece is provided with a plurality of long strip through holes at equal intervals along the circumferential direction; the slider assembly is composed of a plurality of sliders, and a plurality of sliders are penetrated in the expansion and contraction fixing piece at equal intervals along the circumferential direction and pass through the long strip through holes, and a plurality of sliders can be slidably buckled on the slider driver, the slider driver is a conical structure and the diameter of one end facing the positioning plate is smaller than the diameter of the other end thereof, the other end of the slider driver is connected to the cylinder, and the cylinder drives the slider driver to move toward the positioning plate to push the slider, the expansion and contraction fixing piece is fixed on a pair of expansion and contraction fixing seats through bearings, and a pair of expansion and contraction fixing seats can be slidably fixed on the first slide rail, the first slide rail is fixed on the second bottom plate, a worm wheel is coaxially fixed on the expansion and contraction fixing piece, the worm wheel is meshed with a worm, and the worm is connected to a servo motor.

2. The automobile exhaust pipe mixer processing device according to claim 1, characterized in that: Also included is an auxiliary positioning mechanism, which includes: a pair of auxiliary slide rails, which are arranged oppositely on the second bottom plate and located on both sides of the mixer; A pair of auxiliary positioning members, whose bottoms are slidably arranged on the auxiliary slide rails and whose upper parts are semicircular arc-shaped, are assembled together into a circular ring with an inner diameter equal to the outer diameter of the inner cylinder, and the upper width of the auxiliary positioning members is equal to the distance between the end of the inner cylinder and the end of the corrugated plate on that side.

3. The automobile exhaust pipe mixer processing device according to claim 1, characterized in that: The width of the fin is equal to or slightly smaller than the width of the pores at the crest of the corrugated plate.

4. The automobile exhaust pipe mixer processing device according to claim 1, characterized in that: It also includes a support guide rod, which is coaxially arranged on the second bottom plate on one side of the positioning plate away from the expansion and contraction fixing mechanism, and one end of the support guide rod penetrates into the positioning plate.

5. The automobile exhaust pipe mixer processing device according to claim 1, characterized in that: The sliding block is a hollow structure, and one end of the sliding block is provided with a water inlet and a water outlet. The water inlet is connected to a water inlet pipe, and the water outlet is connected to a water outlet pipe.

6. A mixer processing method using the device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: insert the positioning sleeve onto the fin plate of one of the positioning plates, then insert the two ends of the inner cylinder wrapped with the corrugated plate into the positioning plates of the rough fixing device, and fix the U-shaped block and the U-shaped groove by clamping, and insert a pair of fin plates into the gaps corresponding to the crests at both ends of the corrugated plate, and fix them by pressing through the first positioning pressure plate; insert the positioning support rod into the gaps corresponding to the crests formed by the first and last corrugated plates, and drive the cylinder fixing piece through the second slide rail to penetrate into the inner cylinder for support; Wherein, a first positioning platen of a first welding positioning assembly is pressed on the end of the mixer corrugated plate, and another first positioning platen of a first welding positioning assembly is pressed on the front end of the mixer corrugated plate, and the welding head of the laser welding gun is placed between the pair of first positioning plates; Step 2: Move the positioning sleeve to be adjacent to the laser welding gun, and synchronously move the positioning sleeve, the laser welding gun and the first welding positioning assembly at the front end, start welding arc, and complete the end-to-end connection of the corrugated plate; Step 3: remove the positioning support rod, replace the first positioning pressure plate of the first welding positioning assembly with the second positioning pressure plate, drive the inner cylinder to rotate a certain angle through the worm gear of the rotating assembly, move the positioning sleeve to be adjacent to the laser welding gun, and press the second positioning pressure plate on the first and last ends of the wave bottom to be welded, synchronously move the positioning sleeve, the laser welding gun and the first welding positioning assembly at the front end, start the welding arc, complete the welding of the corrugated plate wave bottom, and complete the welding of the corrugated plate opposite wave bottom, and weld several wave bottoms at intervals along the circumference of the corrugated plate in this way; Step 3: Release the pressure of the first welding positioning assembly, remove the positioning sleeve, and synchronously transfer and fix the pair of positioning plates and the mixer to the second positioning plate slide rail of the welding processing device; Step 4: drive the first slide rail to make the expansion and contraction fixture penetrate into the inner cylinder of the mixer, drive the slider driver to push the slider to support the inner wall of the inner cylinder of the mixer, turn on the servo motor to make the worm gear drive the expansion and contraction fixture to rotate the set angle, turn on the second welding positioning assembly, press the second positioning pressure plate on the first and last ends of the corrugated plate to be welded, and place the welding head of the laser welding gun between a pair of second positioning plates, synchronously move the positioning sleeve, the laser welding gun and a pair of second positioning plates, start the welding arc, and complete the welding of the corrugated plate wave bottom; Step 5: Use the worm gear to drive the expansion and contraction fixture to rotate 180° to complete the welding of the corrugated plate to the wave bottom, continue to rotate the mixer 90° to weld, and then rotate it 180° to weld, always ensuring a symmetrical welding until the welding of all the wave bottoms is completed.

7. The mixer processing method according to claim 6, characterized in that: The device also includes a support guide rod, which is coaxially arranged on the second bottom plate on one side of the positioning plate away from the expansion and contraction fixing mechanism, and one end of the support guide rod penetrates the positioning plate; In the step 4, the first slide rail drives the expansion and contraction fixing member to penetrate into the inner cylinder of the mixer and penetrate into the supporting guide rod for fixing.

8. The mixer processing method according to claim 6, characterized in that: In the step 4, cooling water is introduced into the slider during the welding process.

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