Liquid-cooled tube-bending joint welding machine

Abstract

The utility model relates to elbow joint welding technical field especially relates to a kind of liquid cooling elbow joint welding machine, including base, two pipe fittings centring assemblies are symmetrically arranged in the upside of base, elbow pipe and straight pipe are placed between two pipe fittings centring assemblies, when two groups of pipe fittings centring assemblies move towards along vertical direction, its internal component will contact and clamp the outer wall of two kinds of pipe fittings simultaneously, the end surface of elbow pipe and straight pipe is aligned by the way of symmetric force application;Several end surface centring assemblies are arranged at the welding position of two pipe fittings centring assemblies, several end surface centring assemblies are arranged in annular array around weld, act on pipe fitting end from multiple directions, each end surface centring assembly exerts pressure in the direction perpendicular to pipe axis, respectively from top, bottom and left and right side to the radial constraint of pipe fitting end, eliminate end surface gap deviation, realize high-precision end surface centring and rigid clamping.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending joint welding technology, and in particular to a liquid-cooled pipe bending joint welding machine. Background Technology

[0002] In liquid cooling systems, pipe bends are key components connecting cooling pipes. They are typically made by welding straight pipes with L-shaped or U-shaped bends and are widely used in applications requiring high sealing and structural strength, such as battery packs for new energy vehicles, motor cooling, and electronic equipment cooling. Full-circumference welding is usually performed using a liquid cooling pipe bend welding machine.

[0003] In practical applications, liquid cooling pipelines are often made of thin-walled stainless steel or aluminum alloy with small diameters (typically Φ6–Φ25mm), requiring dense, leak-free welds. Therefore, extremely high assembly precision is required. Traditional welding often relies on manual hand-held alignment for spot welding, which is prone to misalignment of the two pipe axes and uneven end-face gaps due to visual biases, hand tremors, or unstable clamping. This can lead to weld misalignment, inconsistent penetration, or even incomplete welds. Especially in mass production environments, the poor consistency of manual operation directly impacts product yield. Utility Model Content

[0004] The purpose of this invention is to provide a liquid-cooled pipe bend welding machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid-cooled pipe bend welding machine includes a base, two pipe alignment components are symmetrically arranged above the base, a bend and a straight pipe are placed flat between the two pipe alignment components, and several end face alignment components are arranged at the welding point of the two pipe alignment components. The several end face alignment components are arranged in a ring array around the weld seam, and welding gun modules are arranged on both sides of the base.

[0007] Preferably, the pipe alignment assembly includes an I-shaped clamp.

[0008] Preferably, the end face centering assembly includes an arc-shaped pressure block slidably mounted on the side of the clamping plate near the pipe. Each clamping plate has two arc-shaped pressure blocks symmetrical about the straight pipe on the side near the pipe, and a plurality of arc-shaped pressure blocks are arranged in a circular array around the weld.

[0009] Preferably, two positive and negative threaded rods are rotatably installed at both ends of the base. The positive and negative threaded rods are provided with threads with opposite helical directions at both ends. The two ends of the clamping plate are respectively threaded onto the positive and negative threaded rods.

[0010] The bottom of the positive and negative threaded rods passes through the base and is fixedly fitted with a driven synchronous pulley, and a motor is fixedly installed on the top of the base.

[0011] Preferably, a dovetail block is fixedly installed on the side of the arc-shaped pressure block near the clamping plate, and a corresponding dovetail groove is opened on the clamping plate. The dovetail block slides in the dovetail groove, and a welding hole is opened on the side of the arc-shaped pressure block near the welding gun module.

[0012] Preferably, the clamping plate has a positioning groove on the outside of the dovetail groove, and the dovetail block is connected to a positioning screw by thread.

[0013] Preferably, two optical shafts are rotatably mounted between two positive and negative threaded rods on the same side of the base, and the opposite ends of the clamping plate are slidably sleeved on the optical shafts.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. The outer wall of the pipe is squeezed by two symmetrically arranged clamping plates, so that the axes of the two pipes are stably aligned with the clamping center; the positive and negative threaded rods drive the clamping plates on both sides to move towards or away from each other, which, together with the motor, improves the coordination and automation of the clamping action; in conjunction with the welding gun modules installed on both sides of the base, automatic spot welding is performed from the side after clamping to form positioning weld points, reducing the error caused by manual alignment and improving the consistency of welding of liquid-cooled bend pipe joints.

[0016] 2. Multiple arc-shaped pressure blocks are arranged in a ring around the weld seam to apply radial pressure to the weld end face from the top, bottom and front and back directions, eliminating the butt gap and angular deviation, and ensuring that the end faces of the bent pipe and the straight pipe are aligned; by adjusting the tightness of the positioning screws on the dovetail block and cooperating with the positioning groove position adjustment hole, it is easier to install. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0019] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the end face centering component structure of this utility model;

[0021] Figure 4This is a cross-sectional schematic diagram of the welding of bent and straight pipes according to this utility model.

[0022] Figure 5 This is a schematic diagram of the connection between the timing pulley and the timing belt of this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Pipe alignment assembly; 11. Clamping plate; 12. Positive and negative threaded rods; 13. Optical shaft; 14. Dovetail groove; 15. Positioning groove; 16. Driven synchronous pulley;

[0025] 2. End face centering component; 21. Arc-shaped pressure block; 22. Dovetail block; 23. Positioning screw; 24. Welding hole;

[0026] 3. Base; 4. Motor; 5. Welding gun module. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] A liquid-cooled pipe bend welding machine, such as Figures 1-5 As shown, the system includes a base 3, with two pipe alignment components 1 symmetrically arranged above the base 3. The bent pipe and the straight pipe are placed flat between the two pipe alignment components 1. When the two sets of pipe alignment components 1 move towards each other in the vertical direction, their internal components will synchronously contact and clamp the outer walls of the two types of pipes. By applying symmetrical force, the end faces of the bent pipe and the straight pipe are aligned, and a stable initial clamping force is provided. In particular, the two pipe alignment components 1 align and clamp the two ends of the right-angled bend, so that its axis is on the center line of the two pipe alignment components 1, so that the mating surface of the bend outlet end and the straight pipe inlet end are aligned in the height direction, avoiding the problem of discontinuous weld or uneven penetration depth caused by vertical misalignment.

[0029] Two pipe fitting centering components 1 are provided with several end face centering components 2 at the weld joint. The several end face centering components 2 are arranged in a ring array around the weld, forming a ring around the weld, and thus acting on the pipe fitting end from multiple directions. Each end face centering component 2 applies pressure in a direction perpendicular to the pipe axis, and applies radial constraint to the pipe fitting end from the top, bottom and left and right sides, respectively, to eliminate end face gap deviation and achieve high-precision end face centering and rigid clamping.

[0030] Welding gun modules 5 are provided on both sides of the base 3, with the front end of the welding gun pointing towards the weld seam area enclosed by the end face centering component 2. After the pipe is fully centered and clamped, the welding gun module 5 extends from the side or approaches the weld seam starting point to perform local spot welding, forming two or more temporary weld points to maintain the relative position of the pipe. After spot welding is completed, the upper and lower pipe centering components 1 move in opposite directions and separate, releasing the overall clamping of the pipe. At this time, the workpiece with the positioning weld points can be removed as a whole and can be manually welded by hand or placed on a turntable. Alternatively, other auxiliary tooling can be equipped to re-clamp the spot-welded pipe and rotate it slowly, so that the fixed welding gun modules 5 on both sides can continuously perform segmented welding on the moving weld seam, realizing semi-automated continuous operation and reducing trajectory errors caused by human intervention. Through the above two methods, it is beneficial to improve the uniformity of the weld seam and the assembly accuracy.

[0031] The pipe alignment assembly 1 includes an I-shaped clamping plate 11. The I-shaped design provides sufficient lateral stiffness and contact area in the middle section of the clamping plate 11. When the two pipe alignment assemblies 1 approach each other, the middle sidewalls of the two opposing clamping plates 11 respectively adhere to and press against the outer circular surfaces of the bend and the straight pipe, so that the axes of the bend and the straight pipe are forced to be stabilized on the symmetrical center plane of the two sets of pipe alignment assemblies 1. This ensures that the welding end faces of the two are kept flush in the height direction, avoiding poor weld formation due to misalignment during assembly. At the same time, the radial clamping force applied synchronously on both sides constrains the displacement of the pipe in the vertical plane, preventing it from shifting up and down during clamping.

[0032] The end-face alignment component 2 includes an arc-shaped pressure block 21 that is slidably installed on the side of the clamping plate 11 near the pipe. Its inner arc-shaped working surface matches the outer diameter of the pipe fitting, and can contact the pipe wall surface when clamped to reduce stress concentration. Each clamping plate 11 is provided with two arc-shaped pressure blocks 21 that are symmetrical about the straight pipe on the side near the pipe fitting. They are symmetrically distributed with the axis of the straight pipe as the center and are located above and below the pipe fitting, respectively. Together with the two arc-shaped pressure blocks 21 on the other side of the pipe fitting alignment component 1, a total of four points are formed around the weld. Several arc-shaped pressure blocks 21 are arranged in a circular array around the weld seam. When they are pushed inward synchronously, they apply a uniform radial extrusion force to the ends of the bend and the straight pipe from the top and bottom and front and back directions, forcing the two pipe end faces to achieve precise alignment in both the horizontal and vertical planes, eliminating radial misalignment and angular deviation, and ensuring consistent butt joint gap.

[0033] Two positive and negative threaded rods 12 are rotatably mounted on both ends of the base 3. The positive and negative threaded rods 12 are provided with threads with opposite helical directions at both ends. The two ends of the clamping plate 11 are respectively threaded onto the positive and negative threaded rods 12. When the positive and negative threaded rods 12 rotate, the upper and lower clamping plates 11 move towards or away from each other under the action of thread transmission, so as to achieve centering and clamping, and ensure that the clamping process is stable and symmetrical.

[0034] The bottom of the positive and negative threaded rods 12 passes through the base 3 and is fixedly fitted with a driven synchronous pulley 16. A motor 4 is fixedly installed above the base 3. The shaft of the motor 4 passes through the base 3 and is fixedly fitted with a central synchronous pulley. The central synchronous pulley and the driven synchronous pulley 16 are connected by a synchronous belt. When the motor 4 starts, its rotational motion is transmitted to the synchronous belt via the central synchronous pulley, which then drives all the connected driven synchronous pulleys 16 to rotate synchronously. Since the driven synchronous pulleys 16 are fixedly connected to the positive and negative threaded rods 12, they drive all the positive and negative threaded rods 12 to rotate in the same direction, ensuring that the two side clamps 11 move synchronously towards or away from each other under the action of the threads. Several driven synchronous pulleys 16 are connected in pairs by a synchronous belt. When one driven synchronous pulley 16... When motor 6 rotates, it drives the remaining driven synchronous pulleys 16 to rotate synchronously and in the same direction. One of the driven synchronous pulleys 16 is connected to the central synchronous pulley via a belt, and then the motor 4 drives all the driven synchronous pulleys 16 to rotate. Specifically, the height between the driven synchronous pulley 16 and the central synchronous pulley, and between the driven synchronous pulleys 16, is set according to the specific height difference. According to the height difference, a corresponding number of driven synchronous pulleys 16 can be set coaxially below a certain positive and negative thread screw 12, as long as the two ends of the belt are kept horizontal. The inner tooth profile of the synchronous belt meshes with the outer tooth groove of the central synchronous pulley and each driven synchronous pulley 16, forming a meshing transmission without relative slippage. The specific model of the motor 4 is FISCHER PF-30-24 / 1.

[0035] A dovetail block 22 is fixedly installed on the side of the arc-shaped pressure block 21 near the clamping plate 11. The clamping plate 11 has a corresponding dovetail groove 14. The dovetail block 22 slides in the dovetail groove 14. Through the cooperation between the dovetail block 22 and the dovetail groove 14, the arc-shaped pressure block 21 maintains the accuracy of its movement trajectory during radial feeding, prevents deflection or jamming, and ensures that the arc-shaped pressure block 21 always presses against the end face of the pipe fitting in a predetermined direction.

[0036] The arc-shaped pressure block 21 has a welding hole 24 on the side near the welding gun module 5. The welding gun module 5 passes through the upper and lower welding holes 24 to perform spot welding, which enables the welding gun to accurately position the weld in the clamped state, avoiding the inability to weld due to obstruction or space limitation, and ensuring that the spot welding process is stable and reliable.

[0037] The clamping plate 11 has a positioning groove 15 on the outside of the dovetail groove 14. The dovetail block 22 is connected to the positioning screw 23 by thread, and its end abuts against the outer wall of the positioning groove 15. During installation, the dovetail block 22 is first inserted into the positioning groove 15, and then the positioning screw 23 is tightened to fix the position of the dovetail block 22, thereby improving the installation speed of the arc surface pressure block 21.

[0038] Two optical shafts 13 are rotatably mounted between two positive and negative threaded rods 12 on the same side of the base 3. The opposite ends of the clamping plate 11 are slidably sleeved on the optical shafts 13. The optical shafts 13 restrict the rotational freedom of the clamping plate 11, ensuring that the clamping plate 11 only performs translational movement under the drive of the positive and negative threaded rods 12, and maintaining the parallelism and stability of the clamping action on the upper and lower sides.

[0039] The working principle of the liquid-cooled pipe bend joint welding machine provided by this utility model is as follows:

[0040] During operation, the bent pipe and straight pipe to be welded are first placed horizontally between the upper and lower sets of clamping plates 11. The bent pipe has a right-angle structure and one end is connected to the straight pipe. The motor 4 is started, and its shaft drives the central synchronous wheel to rotate. The power is transmitted to the driven synchronous wheel 16 fixedly sleeved at the bottom of the positive and negative threaded rods 12 through the synchronous belt, so that several positive and negative threaded rods 12 rotate synchronously in the same direction.

[0041] When the forward and reverse threaded screws 12 rotate, the upper and lower clamping plates 11 move towards each other in the horizontal direction under the drive of the threads, gradually clamping the outer walls of the bent pipe and the straight pipe, so that the axis of the bent pipe and the straight pipe is stably located on the center line connecting the upper and lower clamping plates 11, thus completing the initial alignment.

[0042] After the pipe fitting is initially clamped, multiple arc-shaped pressure blocks 21 apply radial pressure to the welding end face from the top, bottom and front and back directions, forming a uniform clamping force around the weld, further eliminating end face misalignment and achieving high-precision end face alignment.

[0043] Subsequently, the welding gun module 5, which is fixedly installed on both sides of the base 3, approaches the starting position of the weld from the side and performs spot welding on the aligned bend and straight pipe to form two or more positioning welds, so that the relative position of the pipes remains unchanged in subsequent operations.

[0044] After spot welding is completed, motor 4 reverses, driving the positive and negative threaded rods 12 to rotate in opposite directions, causing the upper and lower clamping plates 11 to move away from each other and release the clamping of the pipe fitting. At this time, the workpiece that has been positioned and welded can be taken out as a whole and transferred to the subsequent process. Alternatively, with the auxiliary tooling provided, without disassembling the workpiece, the external clamps can be used to drive the pipe fitting to rotate around the axis, while the welding gun modules 5 fixed on both sides perform continuous welding, thereby improving the uniformity of the weld and the consistency of the assembly.

[0045] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A liquid-cooled pipe bend welding machine, comprising a base (3), characterized in that, Two pipe alignment components (1) are symmetrically arranged above the base (3). The bent pipe and the straight pipe are placed flat between the two pipe alignment components (1). Several end face alignment components (2) are set at the welding point of the two pipe alignment components (1). Several end face alignment components (2) are arranged in a ring array around the weld. Welding gun modules (5) are set on both sides of the base (3).

2. The liquid-cooled pipe bending joint welding machine according to claim 1, characterized in that, The pipe alignment assembly (1) includes an I-shaped clamp (11).

3. The liquid-cooled pipe bending joint welding machine according to claim 2, characterized in that, The end face centering assembly (2) includes an arc-shaped pressure block (21) that is slidably installed on the side of the clamping plate (11) near the pipe. Each clamping plate (11) has two arc-shaped pressure blocks (21) that are symmetrical about the straight pipe on the side near the pipe. A plurality of arc-shaped pressure blocks (21) are arranged in a circular array around the weld.

4. The liquid-cooled pipe bending joint welding machine according to claim 2, characterized in that, The base (3) has two positive and negative threaded rods (12) rotatably installed at both ends. The positive and negative threaded rods (12) are provided with threads with opposite helical directions at both ends. The two ends of the clamp (11) are respectively threaded onto the positive and negative threaded rods (12). The bottom of the positive and negative threaded rod (12) passes through the base (3) and is fixedly fitted with a driven synchronous wheel (16). A motor (4) is fixedly installed on the top of the base (3).

5. A liquid-cooled pipe bending joint welding machine according to claim 3, characterized in that, The arc-shaped pressure block (21) has a dovetail block (22) fixedly installed on the side near the clamping plate (11). The clamping plate (11) has a corresponding dovetail groove (14) and the dovetail block (22) slides in the dovetail groove (14). The arc-shaped pressure block (21) has a welding hole (24) on the side near the welding gun module (5).

6. A liquid-cooled pipe bending joint welding machine according to claim 3, characterized in that, The clamping plate (11) has a positioning groove (15) on the outside of the dovetail groove (14), and a positioning screw (23) is threaded onto the dovetail block (22).

7. A liquid-cooled pipe bending joint welding machine according to claim 4, characterized in that, Two optical shafts (13) are rotatably mounted between two positive and negative threaded rods (12) on the same side of the base (3), and the opposite ends of the clamp (11) are slidably sleeved on the optical shafts (13).

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