Welding positioning device for flange joint machining

Abstract

The invention relates to the technical field of flange joint welding, and provides a welding positioning device for flange joint processing, which comprises a positioning table and a clamping seat, a control panel is installed on one side of the top end of the positioning table, a positioning groove is formed in the middle of the top end of the positioning table, a flange is placed at the top end of the positioning groove, a connector is placed in the middle of the flange, and a positioning structure is arranged on one side of the top end of the positioning table. Through cooperation of the positioning cone and the three sets of positioning claws, when the conical surface of the positioning cone moves downwards, the three sets of positioning claws are pushed to move outwards synchronously, so that the moving blocks are driven to slide in the moving grooves, the outer sides of the three sets of positioning claws abut against the inner wall of the connector, the inner wall of the connector is abut against the three sets of positioning claws, and forced coaxial centering is completed; due to the fact that the positioning claws are evenly distributed by 120 degrees and synchronously move, the jacking force can be gradually transmitted from the eccentric side to the center, finally the eccentric connector is pushed to the center of the flange, and concentric positioning of the connector and the flange is completed.

Description

Technical Field

[0001] This invention relates to the field of flange joint welding technology, and in particular to a welding positioning device for flange joint processing. Background Technology

[0002] Flanges are mechanical components that connect pipes, valves, pumps, and containers. They play a key role in piping systems for connection, sealing, support, and easy disassembly. Sometimes, it is necessary to weld joints onto flanges to facilitate subsequent use. Laser welding is generally used for flange joint welding. When using laser welding, a laser welding positioning device is used to position the flange and joint. To address this, patent CN223476762U discloses a positioning device for flange joint welding. This invention includes an operating table and a three-jaw chuck. The three-jaw chuck includes jaws. The operating table is a square frame with flat plates at the top and bottom. A planar bearing is fixedly connected to the bottom of the operating table, and the three-jaw chuck is fixedly connected to the top of the planar bearing. The three-jaw chuck is rotatably connected to the top of the operating table via the planar bearing. Four fixing blocks are fixedly connected to the outer wall of the three-jaw chuck, evenly distributed. Each fixing block has a pressure plate at its top, with adjustment holes. A clamping stud is threaded onto the top of each fixing block. This invention, through the cooperation of the three-jaw chuck, clamping stud, and pressure plate, can achieve stable fixing of steel pipes and flanges. The position of the pressure plate can be adjusted according to different flange sizes, making the clamp suitable for welding various specifications of steel pipes and flanges. The aforementioned existing technical solutions have the following drawbacks: While the three-jaw chuck and clamping studs, along with the pressure plate, can securely fix steel pipes and flanges during use, and the position of the pressure plate can be adjusted according to flanges of different sizes, making the clamp suitable for welding various specifications of steel pipes and flanges, some problems remain. In actual welding, flange holes have manufacturing tolerances, and connector outer diameters also have tolerances. Whether the flange is fitted outside the connector or the connector is directly inserted into the flange's inner hole, false centering due to tolerances occurs, causing the connector to be close to one side of the flange hole rather than the absolute center. This is imperceptible to the naked eye, resulting in an off-center connector after welding, leading to uneven stress on the subsequent welding sealing surface and leakage. Therefore, a welding positioning device for flange joint processing is needed to ensure that the connector is centered on the flange hole during welding. Summary of the Invention

[0003] The purpose of this invention is to provide a welding positioning device for flange joint processing, which solves the defects of existing welding positioning devices when welding flanges and connectors. Due to the tolerance, the connection head is falsely centered, causing the connection head to be close to one side of the flange hole instead of the absolute center. This results in the connection head being off-center after welding, leading to uneven stress on the subsequent welding sealing surface and leakage of water and air.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a welding positioning device for flange joint processing, comprising a positioning table and a clamping seat; A control panel is installed on one side of the top of the positioning platform. A positioning groove is provided in the middle of the top of the positioning platform. A flange is placed at the top of the positioning groove. A connector is placed in the middle of the flange. A positioning structure is provided on one side of the top of the positioning platform. The positioning structure includes a guide seat, which is installed at one end of the top of the positioning platform. A guide rod is installed inside the guide seat, and a connecting rod is installed on one side of the guide rod. A positioning cone is installed at the bottom end of the connecting rod. A moving groove is opened inside the positioning groove, and a moving block is installed inside the moving groove. A positioning claw is installed at the top of the moving block, and telescopic springs are installed on both sides of the moving block.

[0005] Preferably, the two ends of the telescopic spring are connected to one side of the moving block and one side of the moving groove, respectively, and the moving block and the telescopic spring form a telescopic structure. The positioning claws are provided in three sets, and the three sets of positioning claws are arranged in a ring at the middle position of the top of the positioning groove.

[0006] Preferably, an installation box is installed on one side of the top of the positioning platform. A screw is installed inside the installation box, and a threaded sleeve is installed on the outside of the screw. One side of the threaded sleeve is connected to one side of the connecting rod. A motor is installed at the top of the installation box. A bidirectional lead screw is installed at the middle position inside the positioning platform. Threaded sleeves are installed on the outside of both ends of the bidirectional lead screw. A connecting seat is installed at the top of the threaded sleeve. A guide groove is opened inside the top of the connecting seat. A guide plate is installed inside the guide groove. A connecting block is installed at the middle position of the top of the guide plate. A clamping seat is installed at the top of the connecting block. Fixing blocks are fixed on both sides of the top of the connecting seat. A return spring is installed on one side of the fixing block.

[0007] Preferably, there are two sets of reset springs, which are symmetrically distributed on both sides of the connecting block.

[0008] Preferably, the guide plate is inserted into the interior of the guide groove, and the guide plate and the guide groove form a sliding connection.

[0009] Preferably, the threaded sleeve is provided in two sets, and the two sets of threaded sleeves form a threaded connection with the bidirectional lead screw.

[0010] Preferably, a shock-absorbing structure is provided on one side of the clamping seat. The shock-absorbing structure includes a V-plate, which is installed on both sides of the clamping seat. An installation groove is provided inside the V-plate, and a shock-absorbing pad is installed inside the installation groove. A shock-absorbing spring is installed inside the shock-absorbing pad, and a shock-absorbing ball is installed on one side of the shock-absorbing spring.

[0011] Preferably, the shock-absorbing ball has a hollow ball installed inside, and the hollow ball has a ball bearing placed inside, with the ball bearing rolling and connected inside the hollow ball.

[0012] Preferably, the V-plate is provided in two sets, and the two sets of V-plates are V-shaped on one side of the clamping seat.

[0013] Preferably, the shock-absorbing balls are provided in multiple sets, and the multiple sets of shock-absorbing balls are arranged at equal intervals on one side of the V-shaped plate.

[0014] The welding positioning device for flange joint processing provided by this invention has the following advantages: By incorporating a positioning structure, before laser welding the flange and connector, to ensure the connector is centered within the flange's inner bore, a positioning cone and three sets of positioning claws work together. As the cone moves downwards, the three sets of positioning claws move outwards synchronously, causing the moving block to slide within the moving groove. This allows the outer sides of the three sets of positioning claws to press against the inner wall of the connector, thus forcing coaxial centering. Because the positioning claws are evenly distributed at 120° and move synchronously, the clamping force is gradually transmitted from the eccentric side to the center, ultimately pushing the eccentric connector to the center of the flange. This completes the concentric positioning of the connector and flange, ensuring the connector is centered during welding, thereby achieving center positioning. Furthermore, during the rotation of the screw, the double-acting lead screw is driven to rotate through the bevel gear set. During the rotation of the double-acting lead screw, the two sets of clamping seats are moved to the middle position through the cooperation with the threaded sleeve, thereby clamping the flange in the center. This ensures that the flange is clamped in the center inside the positioning groove, and also ensures that the flange will not move during the subsequent welding process, which will affect the welding effect. This achieves clamping of the flange before center positioning of the connector. Furthermore, through the cooperation of the guide groove and the guide plate, the top of the thread sleeve can slide on the outside of the guide plate, allowing the bidirectional lead screw to rotate. When the thread sleeve continues to move to one side, the return springs on both sides of the connecting block will pull the connecting block on one side and push the connecting block on the other side, continuously providing a "push-pull" coordinated clamping force. The use of two sets of return springs achieves the "push-pull" force balance, applying a continuous and stable centripetal clamping force to the clamping seat. When the clamping seat is clamped, the two sets of springs store energy, and the thread sleeve continues to move. The spring force of the two sets of springs can keep the clamping seat in a clamped state without loosening, ensuring that the clamping seat will not loosen after clamping. The sliding connection design at the bottom of the clamping seat completely eliminates the stringent requirement of forced matching between the clamping stroke and the centering stroke. That is, after the clamping seat is clamped, the thread sleeve can still move freely, ensuring that the positioning cone can move completely into place without affecting the centering accuracy, avoiding the jamming problem of traditional forced synchronization structures. By incorporating a set of V-plates to dampen vibrations generated during subsequent welding after clamping the flange, a damping ball is used for vibration reduction. The damping ball is hollow and made of stainless steel. The core principle is that the hollow thin-walled structure transforms small overall deformation into significant local deformation. Although stainless steel has very small overall elastic deformation, large elastic deformation can occur in local stress concentration areas within the hollow thin-walled structure, without exceeding the material's yield limit. Under radial force, the thin-walled structure undergoes periodic elastic deformation of expansion and contraction, similar to the vibration characteristics of a tympanic membrane. This allows for efficient absorption of high-frequency vibration energy, making it suitable for high-frequency vibrations generated during welding. Furthermore, the sidewalls of the shock-absorbing ball undergo radial elastic bending under vibration and impact. The thin-walled structure amplifies the bending deformation, and the hollow design releases the deformation space, enabling the shock-absorbing ball to produce elastic deformation many times greater than that of a solid structure. The vibration energy is converted into the elastic potential energy of the ball wall material, and then gradually released to achieve the initial shock absorption effect. Furthermore, by using it in conjunction with the shock-absorbing pads and springs, a two-stage elastic system is formed between the shock-absorbing ball and the bottom shock-absorbing pads and springs. The shock-absorbing ball first absorbs high-frequency micro-vibrations, and the shock-absorbing pads and springs then buffer low-frequency larger vibrations, forming a highly efficient shock-absorbing system that combines rigidity and flexibility. This system can effectively buffer the high-frequency vibrations generated by laser welding while maintaining clamping accuracy. The dual elastic structure makes the shock-absorbing frequency band wider, which can simultaneously cope with multiple frequency vibrations generated by laser welding. During high-frequency vibrations, the ball will roll rapidly inside the hollow ball and generate stable sliding friction with the inner wall of the hollow ball, converting mechanical energy into heat energy and consuming the energy of the vibration. Ultimately, this completes the multiple shock-absorbing buffering work for the vibration during welding. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2This is a top-view partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 for Figure 2 A magnified view of the structure at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the present invention viewed from below; Figure 5 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 6 This is a three-dimensional structural diagram of the present invention viewed from below. Figure 7 This is a frontal three-dimensional structural diagram of the positioning structure of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 This is a three-dimensional structural diagram of the positioning structure of the present invention viewed from below; Figure 10 This is a frontal three-dimensional structural diagram of the wire sleeve of the present invention; Figure 11 This is a frontal three-dimensional structural schematic diagram of the shock-absorbing structure of the present invention; Figure 12 This is a three-dimensional structural diagram of the V-shaped plate in frontal cross-section of the present invention; Figure 13 This is a three-dimensional structural schematic diagram of the shock-absorbing ball of the present invention, viewed from the front. Figure 14 This is a three-dimensional structural schematic diagram of the side cross-section of the shock-absorbing ball of the present invention.

[0016] The following are the annotations in the diagram: 1. Positioning platform; 2. Control panel; 3. Flange; 4. Positioning groove; 5. Clamping seat; 6. Connector; 7. Positioning structure; 701. Connecting rod; 702. Guide rod; 703. Guide seat; 704. Mounting box; 705. Positioning claw; 706. Moving groove; 707. Telescopic spring; 708. Moving block; 709. Positioning cone; 7010. Motor; 7011. Screw; 7012. Thread. 7013. Bevel gear set; 7014. Double-acting lead screw; 7015. Screw sleeve; 7016. Connecting seat; 7017. Fixing block; 7018. Return spring; 7019. Guide groove; 7020. Guide plate; 7021. Connecting block; 8. Vibration damping structure; 801. V-plate; 802. Vibration damping ball; 803. Mounting groove; 804. Vibration damping pad; 805. Vibration damping spring; 806. Hollow ball; 807. Ball bearing. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-14 The present invention provides a welding positioning device for flange joint processing, comprising a positioning table 1 and a clamping seat 5; a control panel 2 is installed on one side of the top of the positioning table 1, a positioning groove 4 is provided at the middle position of the top of the positioning table 1, a flange 3 is placed at the top of the positioning groove 4, a connector 6 is placed at the middle position of the flange 3, a positioning structure 7 is provided on one side of the top of the positioning table 1, the positioning structure 7 includes a guide seat 703, the guide seat 703 is installed at one end of the top of the positioning table 1, a guide rod 702 is installed inside the guide seat 703, a connecting rod 701 is installed on one side of the guide rod 702, a positioning cone 709 is installed at the bottom end of the connecting rod 701, a moving groove 706 is provided inside the positioning groove 4, a moving block 708 is installed inside the moving groove 706, a positioning claw 705 is installed at the top of the moving block 708, and telescopic springs 707 are installed on both sides of the moving block 708. The two ends of the telescopic spring 707 are connected to one side of the moving block 708 and one side of the moving groove 706, respectively. The moving block 708 and the telescopic spring 707 form a telescopic structure. The positioning claw 705 is provided in three sets, and the three sets of positioning claw 705 are arranged in a ring at the middle position of the top of the positioning groove 4. A mounting box 704 is installed on one side of the top of the positioning platform 1. A screw 7011 is installed inside the mounting box 704. A threaded sleeve 7012 is installed on the outside of the screw 7011. One side of the threaded sleeve 7012 is connected to one side of the connecting rod 701. A motor 7010 is installed on the top of the mounting box 704. A double-acting screw 7014 is installed in the middle of the inside of the positioning platform 1. Threaded sleeves 7015 are installed on the outside of both ends of the double-acting screw 7014. A connecting seat 7016 is installed on the top of the threaded sleeve 7015. A guide groove 7019 is opened inside the top of the connecting seat 7016. A guide plate 7020 is installed inside the guide groove 7019. A connecting block 7021 is installed in the middle of the top of the guide plate 7020. A clamping seat 5 is installed on the top of the connecting block 7021. Fixing blocks 7017 are fixed on both sides of the top of the connecting seat 7016. A return spring 7018 is installed on one side of the fixing block 7017. Two sets of return springs 7018 are provided, and the two sets of return springs 7018 are symmetrically distributed on both sides of the connecting block 7021. The guide plate 7020 is inserted into the guide groove 7019, and a sliding connection is formed between the guide plate 7020 and the guide groove 7019; Two sets of threaded sleeves 7015 are provided, and the two sets of threaded sleeves 7015 form a threaded connection with the bidirectional lead screw 7014.

[0019] Reference Figures 1-14 As shown: Before laser welding flange 3 and connector 6, the position of positioning cone 709 is adjusted and installed to ensure that the center point of positioning cone 709 is aligned with the center point of positioning groove 4, which facilitates subsequent center positioning. After the positioning cone 709 is installed, flange 3 is placed at the top of positioning groove 4 and flange 3 is fitted on the outside of multiple sets of positioning claws 705. After flange 3 is placed, connector 6 is fitted into the inner hole of flange 3 outside the positioning claws 705. After connector 6 is placed, the external power supply starts motor 7010 to drive screw 7011 to rotate. During the rotation of screw 7011, it will drive double-acting screw 7014 to rotate through bevel gear set 7013. During the rotation of double-acting screw 7014, it will drive two sets of clamping seats 5 to move to the middle position through the cooperation between double-acting screw 7015, thereby centering flange 3. This can ensure that flange 3 is centered in the positioning groove 4 and that flange 3 will not move during the subsequent welding process, affecting the welding effect. During rotation, the screw 7011, through its interaction with the threaded sleeve 7012, drives the connecting rod 701 downwards. This downward movement causes the guide rod 702 to slide inside the guide seat 703, guiding the connecting rod 701 and ensuring its stability. To prevent the threaded sleeve 7015 from jamming with the double-acting screw 7014 before the positioning cone 709 has centered the connector 6, allowing the double-acting screw 7014 to continue rotating after clamping without affecting the screw 7011, the threaded sleeve 7015 can slide on the outside of the guide plate 7020 after clamping by the guide groove 7019, allowing the double-acting screw 7014 to rotate. As the threaded sleeve 7015 continues to move to one side, the return springs 7018 on both sides of the connecting block 7021 will pull the connecting block 7021 on one side and push it on the other, continuously providing a coordinated "push-pull" clamping force. The use of the two sets of return springs 7018 achieves a "push-pull" force balance, applying a continuous and stable centripetal clamping force to the clamping seat 5. When the clamping seat 5 is clamped, the two sets of return springs 7018 store energy, and the threaded sleeve... As 7015 continues to move, the spring force of the two sets of return springs 7018 can keep the clamping seat 5 in a clamped state without loosening, ensuring that the clamping seat 5 will not loosen after clamping. The sliding connection design at the bottom of the clamping seat 5 completely eliminates the harsh requirement of forced matching between the clamping stroke and the centering stroke. That is, after the clamping seat 5 is clamped, the thread sleeve 7015 can still move freely, ensuring that the positioning cone 709 can move down completely into place without affecting the centering accuracy, thus avoiding the jamming problem of traditional forced synchronization structures. When flange 3 is clamped, the positioning cone 709 continues to move downwards. When the positioning cone 709 moves to contact the inner side of the positioning claw 705, the inner side of the positioning claw 705 is provided with an inner inclined surface that matches the outer side of the positioning cone 709. The inclined surface of the positioning claw 705 faces upwards and just catches the positioning cone 709. At this time, the downward pressing force of the cone surface of the positioning cone 709 is decomposed into a radially outward thrust, pushing the three sets of positioning claws 705 to move outwards synchronously, thereby causing the moving block 708 to slide inside the moving groove 706, so that... The outer sides of the three sets of positioning claws 705 press against the inner wall of the connector 6. At this time, the positioning claws 705 stop expanding, and the inner wall of the connector 6 is pressed by the three sets of positioning claws 705, thus completing the forced coaxial centering. Because the positioning claws 705 are evenly distributed at 120° and move synchronously, the pressing force will be gradually transmitted from the eccentric side to the center, eventually pushing the eccentric connector 6 to the center of the flange 3, completing the concentric positioning of the connector 6 and the flange 3, ensuring that the connector 6 is in the center of the flange 3 during welding, and preventing the center of the connector 6 from shifting and affecting the welding effect at the connection. A shock-absorbing structure 8 is provided on one side of the clamping seat 5. The shock-absorbing structure 8 includes a V-shaped plate 801, which is installed on both sides of the clamping seat 5. The V-shaped plate 801 has an installation groove 803 inside, and a shock-absorbing pad 804 is installed inside the installation groove 803. A shock-absorbing spring 805 is installed inside the shock-absorbing pad 804, and a shock-absorbing ball 802 is installed on one side of the shock-absorbing spring 805. A hollow ball 806 is installed inside the shock-absorbing ball 802, and a ball bearing 807 is placed inside the hollow ball 806. The ball bearing 807 rolls and connects inside the hollow ball 806. There are two sets of V-shaped plates 801, which are arranged in a V-shape on one side of the clamping seat 5. There are multiple sets of shock-absorbing balls 802, which are arranged at equal intervals on one side of the V-shaped plates 801.

[0020] Reference Figures 1-14As shown: After the clamping seat 5 clamps the flange 3 through two sets of V-plates 801, the damping ball 802 will fit against the outside of the flange 3. The damping ball 802 is hollow and made of stainless steel. The core principle is that the hollow thin-walled structure transforms small overall deformation into significant local deformation. Although stainless steel has very small overall elastic deformation, in the hollow thin-walled structure, the local stress concentration area can produce large elastic deformation without exceeding the material yield limit. Under the action of radial force, the thin-walled structure undergoes periodic elastic deformation of expansion and contraction, similar to the vibration characteristics of a tympanic membrane. It can efficiently absorb high-frequency vibration energy and is suitable for high-frequency vibrations generated during welding. The sidewall of the damping ball 802 undergoes radial elastic bending under vibration impact. The thin-walled structure amplifies the bending deformation, and the hollow design releases the deformation space, allowing the damping ball 802 to produce elastic deformation many times greater than that of a solid structure. The vibration energy is converted. The elastic potential energy is converted into the ball wall material and then gradually released to achieve a preliminary shock absorption effect. In addition, through the cooperation of the shock-absorbing pad 804 and the shock-absorbing spring 805, a secondary elastic system is formed between the shock-absorbing ball 802 and the bottom shock-absorbing pad 804 and shock-absorbing spring 805. The shock-absorbing ball 802 first absorbs high-frequency small vibrations, and the shock-absorbing pad 804 and shock-absorbing spring 805 then buffer low-frequency larger vibrations, forming a high-efficiency shock absorption system that combines rigidity and flexibility. It can effectively buffer the high-frequency vibrations generated by laser welding while maintaining clamping accuracy. The dual elastic structure makes the shock absorption frequency band wider and can cope with multiple frequency vibrations generated by laser welding at the same time. When there is high-frequency vibration, the ball 807 will roll rapidly inside the hollow ball 806 and generate stable sliding friction with the inner wall of the hollow ball 806, converting mechanical energy into heat energy and consuming the energy of vibration. Finally, it completes the multiple shock absorption and buffering work for the vibration during welding.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding positioning device for flange joint processing, comprising a positioning table (1) and a clamping seat (5); Its features are: A control panel (2) is installed on one side of the top of the positioning platform (1). A positioning groove (4) is provided at the middle position of the top of the positioning platform (1). A flange (3) is placed at the top of the positioning groove (4). A connector (6) is placed at the middle position of the flange (3). A positioning structure (7) is provided on one side of the top of the positioning platform (1). The positioning structure (7) includes a guide seat (703), which is installed at one end of the top of the positioning platform (1). A guide rod (702) is installed inside the guide seat (703). A connecting rod (701) is installed on one side of the guide rod (702). A positioning cone (709) is installed at the bottom end of the connecting rod (701). A moving groove (706) is opened inside the positioning groove (4). A moving block (708) is installed inside the moving groove (706). A positioning claw (705) is installed at the top of the moving block (708). Telescopic springs (707) are installed on both sides of the moving block (708).

2. The welding positioning device for flange joint processing according to claim 1, characterized in that: The two ends of the telescopic spring (707) are respectively connected to one side of the moving block (708) and one side of the moving groove (706). The moving block (708) and the telescopic spring (707) form a telescopic structure. The positioning claw (705) is provided in three sets. The three sets of positioning claws (705) are arranged in a ring at the middle position of the top of the positioning groove (4).

3. The welding positioning device for flange joint processing according to claim 1, characterized in that: A mounting box (704) is installed on one side of the top of the positioning platform (1). A screw (7011) is installed inside the mounting box (704). A threaded sleeve (7012) is installed on the outside of the screw (7011). One side of the threaded sleeve (7012) is connected to one side of the connecting rod (701). A motor (7010) is installed on the top of the mounting box (704). A bidirectional lead screw (7014) is installed in the middle position inside the positioning platform (1). Threaded sleeves (7015) are installed on the outside of both ends of the bidirectional lead screw (7014). A connecting seat (7016) is installed at the top of the sleeve (7015). A guide groove (7019) is opened inside the top of the connecting seat (7016). A guide plate (7020) is installed inside the guide groove (7019). A connecting block (7021) is installed at the middle position of the top of the guide plate (7020). A clamping seat (5) is installed at the top of the connecting block (7021). Fixing blocks (7017) are fixed on both sides of the top of the connecting seat (7016). A return spring (7018) is installed on one side of the fixing block (7017).

4. The welding positioning device for flange joint processing according to claim 3, characterized in that: The reset spring (7018) is provided in two sets, and the two sets of reset springs (7018) are symmetrically distributed on both sides of the connecting block (7021).

5. A welding positioning device for flange joint processing according to claim 3, characterized in that: The guide plate (7020) is inserted into the interior of the guide groove (7019), and the guide plate (7020) and the guide groove (7019) form a sliding connection.

6. A welding positioning device for flange joint processing according to claim 3, characterized in that: The threaded sleeve (7015) is provided in two sets, and the two sets of threaded sleeves (7015) form a threaded connection with the bidirectional lead screw (7014).

7. The welding positioning device for flange joint processing according to claim 1, characterized in that: A shock-absorbing structure (8) is provided on one side of the clamping seat (5). The shock-absorbing structure (8) includes a V-plate (801). The V-plate (801) is installed on both sides of the clamping seat (5). An installation groove (803) is provided inside the V-plate (801). A shock-absorbing pad (804) is installed inside the installation groove (803). A shock-absorbing spring (805) is installed inside the shock-absorbing pad (804). A shock-absorbing ball (802) is installed on one side of the shock-absorbing spring (805).

8. A welding positioning device for flange joint processing according to claim 7, characterized in that: The shock-absorbing ball (802) has a hollow ball (806) installed inside, and a ball bearing (807) is placed inside the hollow ball (806). The ball bearing (807) is connected to the hollow ball (806) by rolling.

9. A welding positioning device for flange joint processing according to claim 7, characterized in that: The V-shaped plate (801) is provided in two sets, and the two sets of V-shaped plates (801) are V-shaped on one side of the clamping seat (5).

10. A welding positioning device for flange joint processing according to claim 7, characterized in that: The shock-absorbing balls (802) are provided in multiple sets, and the multiple sets of shock-absorbing balls (802) are arranged at equal intervals on one side of the V-shaped plate (801).

Images