A precision-positioning elbow assembly welding device

Abstract

This utility model discloses a welding device for precisely positioned elbow assemblies, comprising a base and sequentially arranged bottom straight pipe clamping section, middle elbow clamping section, and top straight pipe clamping section. The bottom section uses a horizontal cylinder to drive the clamping jaws to cooperate with the fixing plate to clamp the straight pipe section. The middle section uses an inclined auxiliary lifting platform to mount replaceable magnetic clamping components, whose double semi-circular magnetic attraction structure achieves precise positioning of the elbow surface and prevents mistaken insertion. The top section uses a main lifting platform and a downward pressing cylinder to fix another straight pipe section. Each clamping surface is covered with an elastic silicone layer, the fixing plate is equipped with a pressure sensor, and the base has a storage slot compatible with multiple specifications of magnetic clamping components. This device solves the problems of inaccurate positioning, unstable clamping, and low efficiency in traditional welding, and is suitable for high-precision elbow welding scenarios such as refrigeration systems, combining precise positioning, rapid clamping, and specification compatibility.

Description

Technical Field

[0001] This article relates to a welding device for elbow assemblies that can be precisely positioned. Background Technology

[0002] In the installation and commissioning of refrigeration systems, the welding quality of elbow assemblies directly affects the system's performance and reliability. Traditional welding equipment uses simple clamps to fix straight pipe sections, lacking effective support for the curved surfaces of elbows. During welding, the pipes are prone to displacement or deformation due to thermal stress, leading to weld cracks and defects, causing refrigerant leaks, increasing safety hazards and maintenance costs in system operation.

[0003] Furthermore, traditional welding methods rely too heavily on manual experience for positioning, making it difficult to accurately control the angle of bends and the coaxiality of straight pipes. This can easily lead to problems such as poor refrigerant flow and uneven pressure, affecting refrigeration efficiency. At the same time, traditional manual clamping methods are cumbersome and time-consuming during batch installations, increasing the labor intensity of workers and severely hindering the construction progress.

[0004] In mass production scenarios, where pipelines are complex and require high precision, the problems of traditional devices, such as rough positioning and unstable clamping, become more prominent, significantly increasing processing difficulty and cost. Therefore, the shortcomings of traditional elbow assembly welding devices in terms of clamping stability, positioning accuracy, operational efficiency, and mistake-proofing design have become key factors restricting the improvement of refrigeration system installation quality and efficiency. Developing devices adapted to the characteristics of refrigeration system pipeline welding, achieving precise positioning, rapid and stable clamping, and specification compatibility, is of great significance for improving installation quality and reducing operating costs. Utility Model Content

[0005] This utility model aims to provide a welding device for elbow assemblies that can be precisely positioned, effectively solving problems such as unstable clamping, inaccurate positioning, and slow fixing speed in existing structures. The specific solution is as follows:

[0006] A welding device for elbow assembly with precise positioning includes a base, and a bottom straight pipe clamping part, a middle elbow clamping part and a top straight pipe clamping part are arranged sequentially on the top of the base.

[0007] The bottom straight pipe clamping part includes a horizontal cylinder, a push block and a gripper; the tail of the push block is connected to the push rod head of the horizontal cylinder, the top of the push block is connected to the tail of the gripper, the top shape of the gripper matches the head of the bent pipe to be clamped, and a fixing plate is provided in the direction directly opposite the gripper.

[0008] The central pipe bending clamping section includes an inclined auxiliary lifting platform. A magnetic clamping element is mounted on the vertical slider of the auxiliary lifting platform, and the inclination angle of the magnetic clamping element is fixed. When welding pipes of different dimensions, the accuracy of clamping can be indirectly controlled by changing the magnetic clamping elements with different inclination angles. For example, when welding a pipe with a 45° bend, selecting the appropriate combination of auxiliary lifting platform and magnetic clamping element can better help the operator quickly perform clamping and positioning. If the operator selects the wrong magnetic clamping element, installation cannot be completed, thus serving as a mistake-proof mechanism to prompt the operator to change to a suitable magnetic clamping element.

[0009] At the same time, if the bending angle is incorrect, the operator can be prompted to check the bending angle, thereby saving costs and preventing unnecessary processing waste.

[0010] The magnetic clamping component consists of two semicircular parts, which are connected by magnets.

[0011] The top straight pipe clamping part includes a main lifting platform, a control cylinder, a pressing cylinder, a pressing block, and a main support block. The bottom of the main lifting platform is connected to the push rod of the control cylinder, and a pressing cylinder is provided on the side of the main lifting platform. A pressing block is connected to the push rod of the pressing cylinder. The pressing block cooperates with the main support block to clamp the top straight pipe part of the bend to be welded.

[0012] During installation, the bottom straight pipe section of the bend to be welded is first clamped by the bottom straight pipe clamping part. The horizontal cylinder drives the push block to move the clamping claw towards the fixing plate. Based on the precise fit between the top of the clamping claw and the shape of the bend head, the bottom straight pipe section is firmly fixed.

[0013] Next, based on the pre-set design dimensions, the height of the main lifting platform is automatically adjusted by controlling the cylinder to align the straight pipe section at the top of the bend with the main support block. Then, the pressing cylinder is activated to press the top straight pipe section onto the main support block through the pressing block, thus completing the pressing and fixing of the top straight pipe section.

[0014] Finally, based on the specific angle and dimensional parameters of the middle bend, a matching auxiliary lifting platform and magnetic clamping device combination is selected (e.g., a magnetic clamping device with a 45° tilt angle corresponding to a 45° double bend). The height of the magnetic clamping device is adjusted by the vertical slider of the auxiliary lifting platform, ensuring that its arc-shaped inner surface fits tightly against the curved surface of the bend, simultaneously completing the coaxiality calibration of both ends of the bend and the upper and lower straight pipe sections. After the positions are aligned, the vertical height of the auxiliary lifting platform is locked to form a stable welding positioning reference.

[0015] After the first piece is welded, the system automatically records the clamping parameters of the bend assembly (such as the height of the main lifting platform and the position of the auxiliary lifting platform). When welding the same type of bend assembly in subsequent batches, it is only necessary to release the horizontal cylinder and the downward cylinder and disassemble the movable semicircular part of the magnetic clamping component to quickly load and unload the workpiece without having to repeatedly adjust the parameters, which significantly improves the efficiency of batch welding.

[0016] To facilitate the replacement of the magnetic clamping components, the magnetic clamping components are detachably connected to the slider of the auxiliary lifting platform via positioning pins and fixing bolts. The base has storage slots for accommodating magnetic clamping components of different sizes. The magnetic attraction force of the magnetic clamping components can be adjusted by replacing the built-in magnets of different sizes.

[0017] To further protect the bent pipe from damage during clamping, the inner surface of the arc-shaped groove of the gripper, the lower surface of the pressing block, the upper surface of the main support block, and the inner arc of the magnetic clamping block are all covered with an elastic silicone layer.

[0018] To prevent the top straight pipe section from shaking during welding, the contact surface between the lower pressure block and the main support block is arc-shaped, with the radius of the arc matching the outer diameter of the pipe to be welded, and anti-slip texture is provided on the contact surface.

[0019] Meanwhile, a pressure sensor is installed on the fixed plate. The extension of the transverse cylinder can be adjusted by the reading of the pressure sensor to prevent the transverse cylinder from extending too much and damaging the pipe to be welded. Beneficial effects

[0020] This elbow assembly welding device, through a bottom straight pipe clamping section, a middle bend pipe clamping section, and a top straight pipe clamping section arranged sequentially above the base, forms a precise and stable positioning and clamping of the elbow assembly in all dimensions. The bottom straight pipe clamping section uses a horizontal cylinder to drive the push block and the gripper. Through the cooperation of the gripper and the fixing plate, the shape of the bottom straight pipe section is adapted for clamping, ensuring the stability of the positioning reference. The top straight pipe clamping section adjusts the height of the main lifting platform by controlling the cylinder, and in combination with the downward pressing cylinder driving the downward pressing block to cooperate with the main support block, realizes the downward pressing and fixing of the top straight pipe section.

[0021] The stable clamping system, which forms three points at the top, bottom, and middle, effectively suppresses displacement and deformation during welding. The overall structure, through modular design, can accommodate the rapid positioning, precise welding, and mass production efficiency of elbows of different specifications, significantly improving welding quality and operational reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an overall welding device for elbow assembly;

[0023] Figure 2 This is a schematic diagram of the lifting section in a welding device for elbow assemblies;

[0024] Figure 3 This is a side view diagram of a welding device for elbow assembly.

[0025] In the diagram: 1. The bent pipe to be welded, 2. The base, 3. The push block, 4. The main lifting platform, 5. The auxiliary lifting platform, 6. The pressing cylinder, 7. The pressing block, 8. The magnetic clamping component, 9. The main support block, 10. The gripper. Detailed Implementation

[0026] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model. Example

[0027] Taking a 60° elbow assembly as an example:

[0028] like Figure 1-3 As shown, a precision-positioning elbow assembly welding device includes a base 2, with a bottom straight pipe clamping part, a middle elbow clamping part, and a top straight pipe clamping part arranged sequentially on top of the base 2.

[0029] Bottom straight pipe clamping part: It consists of a horizontal cylinder, a push block 3 and a gripper 10. The tail of the push block 3 is connected to the head of the push rod of the horizontal cylinder, and the top is connected to the tail of the gripper 10. The top shape of the gripper 10 is adapted to the head of the bottom straight pipe section of the bent pipe 1 to be clamped. A fixing plate is provided in the direction directly opposite the gripper 10.

[0030] The middle bending pipe clamping part includes an inclined auxiliary lifting platform 5. A magnetic clamping component 8 is installed on the vertical slider of the auxiliary lifting platform 5. The magnetic clamping component 8 is divided into two semi-circular parts that can be detachably connected by a magnetic attraction structure. The magnetic clamping component 8 is detachably connected to the slider of the auxiliary lifting platform 5 by a positioning pin and a fixing bolt.

[0031] Top straight pipe clamping part: includes main lifting platform 4, control cylinder, pressing cylinder 6, pressing block 7 and main support block 9. The bottom of the main lifting platform 4 is connected to the push rod of the control cylinder, and the side is equipped with pressing cylinder 6. The push rod of pressing cylinder 6 is connected to pressing block 7. Pressing block 7 and main support block 9 cooperate to clamp the top straight pipe section of the bend to be welded 1. The contact surface between the two is an arc shape that matches the outer diameter of the pipe and is provided with anti-slip texture.

[0032] The clamping steps are as follows:

[0033] S1. Select a magnetic clamping component 8 with an inclination angle of 60° from the storage slot of the base 2, and install it on the vertical slider of the auxiliary lifting platform 5 by means of positioning pins and fixing bolts, so as to ensure that the two semi-circular magnetic clamping components 8 are closed by magnetic attraction structure.

[0034] S2. Place the bottom straight pipe section of the bend to be welded 1 in the bottom straight pipe clamping part, start the horizontal cylinder, push the push block 3 with the push rod to move the clamp 10 towards the fixing plate, and use the arc-shaped groove on the top of the clamp 10 that matches the head of the bend 1 to complete the bottom fixation. The fixing plate feeds back the pressure data to the control system in real time.

[0035] S3. Start the control cylinder to adjust the height of the main lifting platform 4 so that the straight pipe section at the top of the bend 1 is aligned with the main support block 9. Then start the pressing cylinder 6 to drive the pressing block 7 to press the top straight pipe section onto the main support block 9, thus completing the top fixing.

[0036] S4. Operate the lifting mechanism of the auxiliary lifting platform 5, adjust the vertical position of the magnetic clamp 8, so that the inner arc surface of the magnetic clamp 8 is completely in contact with the 60° curved surface in the middle of the bent pipe 1. At the same time, observe the alignment of the two ends of the bent pipe 1 with the bottom clamp 10 and the top main support block 9. After confirming that the coaxiality meets the requirements, lock the height of the auxiliary lifting platform 5.

[0037] S5. The elbow assembly interface is welded using automatic welding equipment. During the welding process, the magnetic attraction structure of the magnetic clamp 8 and the locking structure of the auxiliary lifting platform 5 work together to suppress thermal deformation.

[0038] S6. After welding is completed, release the horizontal cylinder and the downward cylinder 6 in sequence, disassemble the semi-circular part of the magnetic clamping part 8, and take out the finished pipe bend assembly. For subsequent welding of the same specifications, simply call the stored parameters such as the height of the main lifting platform 4 and the position of the auxiliary lifting platform 5, and repeat steps 2-5 to achieve quick clamping.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A welding device for precisely positioned elbow assemblies, characterized in that, Includes a base, and the base is provided with a bottom straight pipe clamping part, a middle curved pipe clamping part and a top straight pipe clamping part in sequence on the top. The bottom straight pipe clamping part includes a horizontal cylinder, a push block and a gripper; the tail of the push block is connected to the push rod head of the horizontal cylinder, the top of the push block is connected to the tail of the gripper, the top shape of the gripper matches the head of the bent pipe to be clamped, and a fixing plate is provided in the direction directly opposite the gripper. The top straight pipe clamping part includes a main lifting platform, a control cylinder, a pressing cylinder, a pressing block, and a main support block. The bottom of the main lifting platform is connected to the push rod of the control cylinder, and a pressing cylinder is provided on the side of the main lifting platform. A pressing block is connected to the push rod of the pressing cylinder. The pressing block cooperates with the main support block to clamp the top straight pipe part of the bend to be welded.

2. The elbow assembly welding device with precise positioning according to claim 1, characterized in that, The central bending pipe clamping part includes an inclined auxiliary lifting platform. A magnetic clamping component is provided on the vertical slider of the auxiliary lifting platform. The inclination angle of the magnetic clamping component is consistent with the angle of the bend to be welded. The magnetic clamping component is divided into two semicircular parts, which are detachably connected by a magnetic attraction structure.

3. The elbow assembly welding device with precise positioning according to claim 2, characterized in that, The magnetic clamping component is detachably connected to the slider of the auxiliary lifting platform via positioning pins and fixing bolts.

4. The elbow assembly welding device with precise positioning according to claim 2, characterized in that, The inner surface of the arc-shaped groove of the gripper, the lower surface of the pressing block, the upper surface of the main support block, and the inner arc of the magnetic clamping block are all covered with an elastic silicone layer.

5. A precisely positioned elbow assembly welding device according to any one of claims 1-4, characterized in that, The contact surfaces of the pressure block and the main support block are arc-shaped, with the radius of the arc matching the outer diameter of the pipe to be welded, and anti-slip textures are provided on the contact surfaces.

6. The elbow assembly welding device with precise positioning according to claim 1, characterized in that, A pressure sensor is installed on the mounting plate.

7. The elbow assembly welding device with precise positioning according to claim 4, characterized in that, The base has a storage slot for storing magnetic clamping parts of different sizes.

8. The elbow assembly welding device with precise positioning according to claim 7, characterized in that, The magnetic attraction force of the magnetic clamp can be adjusted by replacing the built-in magnets of different sizes.

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