A test-bed guide rail welding coaxial degree correction clamping mechanism
By designing a coaxiality correction clamping mechanism for welding guide rails on a test bench, the automatic coaxiality correction and rotation of the guide rails are integrated using springs and electric cylinders. This solves the problem of coaxiality correction in guide rail welding, improves welding accuracy and efficiency, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU HONGLI MECHANICAL MFG CO LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing technology, the test bench guide rail is difficult to automatically correct its coaxiality during the welding process, which leads to a decrease in welding accuracy.
A coaxiality correction clamping mechanism for welding guide rails on a test bench was designed. The mechanism utilizes the continuous tension of a spring to automatically insert the positioning pin. Combined with the mechanical linkage between the limiting cover and the limiting roller, the mechanism automatically corrects the coaxiality of the guide rails. The mechanism also achieves integrated docking and rotation operations through electric cylinder drive.
Automatic coaxiality correction of the guide rails has been achieved, which has improved welding accuracy and efficiency, reduced manufacturing costs, simplified the operation process, and increased the applicability and durability of the equipment.
Smart Images
Figure CN122480600A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of aerospace test bench component processing technology, specifically a test bench guide rail welding coaxiality correction and clamping mechanism. Background Technology
[0002] Currently, many test benches have long guide rails, which cannot be made from a single profile. Two or more guide rails must be welded together to form a longer guide rail. During operation, multiple guide rails need to be butt-welded together to form a longer guide rail, and then the guide rail needs to be corrected, stress-relieved, and precision-machined before being installed and welded onto the test bench base as a whole.
[0003] For example, patent CN210209192U discloses a welding fixture for guide rail production. This patent achieves a welding fixture for guide rail production through the cooperation of a housing, a threaded motor, a threaded shaft, a threaded block, a connecting block, a through groove, a fixing block, a fixing frame, a guide rail body, a connecting spring, a clamping plate, a rotary bearing, a threaded rod, and a rubber anti-slip pad. This fixture replaces manual hand-held fixing of the guide rail, saving time and effort while ensuring welding quality and greatly improving welding efficiency. However, in actual use, this type of equipment requires clamping two guide rails separately, and there is a certain distance between the clamping part and the guide rail connection point. During the connection process, when the coaxiality of the guide rail connection point deviates, it is not easy to automatically correct it, affecting the subsequent welding accuracy. Summary of the Invention
[0004] The purpose of this invention is to provide a coaxiality correction and clamping mechanism for welding guide rails of a test bench, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a coaxiality correction clamping mechanism for welding guide rails on a test bench, comprising a base and a calibration assembly. A fixed plate is mounted on the top of one end of the base, and guide posts are symmetrically fixedly connected to one side of the lower part of the fixed plate. A movable plate is slidably connected to the outer side of the guide posts, and a first clamping assembly is provided on the upper part of the movable plate. A second clamping assembly is provided on the upper part of the fixed plate, and the second clamping assembly has the same structure as the first clamping assembly. A docking assembly is connected to one side of the second clamping assembly and the first clamping assembly. The calibration assembly is located in the middle of the first clamping assembly and the second clamping assembly, and the calibration assembly includes a tension spring. A fixed block is fixedly connected to one end of the tension spring, and positioning pins are symmetrically arranged on one side of the fixed block. A positioning hole is opened in the middle of the second clamping assembly. A limit roller is rotatably connected to the top of the fixed block, and a limit cover is provided above the limit roller. A counterweight is slidably connected to the outer side of one end of the middle of the first clamping assembly, and a pull rope is fixedly connected to one end of the counterweight. A baffle is fixedly connected to one end of the pull rope.
[0006] Furthermore, the first clamping assembly includes a rotating base, a support plate fixedly connected to the inner side of the rotating base, and a threaded sleeve rotatably connected to the upper part of the rotating base. A screw rod is threadedly connected to the inner side of the threaded sleeve, and a lifting frame is fixedly connected to the bottom of the screw rod. Telescopic rods are symmetrically arranged on the top of the lifting frame, and a slide rod is slidably connected to the lower center of the lifting frame. A compression spring is sleeved on the lower outer side of the slide rod, and an upper clamping plate is fixedly connected to the bottom of the slide rod. A connecting plate is fixedly connected to the top of the slide rod, and connecting plates are rotatably connected to both sides of the connecting plate. A side clamping plate is rotatably connected to the lower part of the connecting plate, and a smooth rod is slidably connected to the upper part of the side clamping plate.
[0007] Furthermore, the telescopic rod is fixedly connected to the rotating seat, and the rotating seat is rotatably connected to the movable plate.
[0008] Furthermore, the light rod is fixedly connected to the lifting frame, and the lifting frame abuts against the compression spring.
[0009] Furthermore, the support plate, upper clamping plate, side clamping plate, and second clamping assembly are slidably connected to their adjacent counterweights, and the support plate, upper clamping plate, side clamping plate, and second clamping assembly are rotatably connected to their adjacent baffles, and the support plate, upper clamping plate, and side clamping plate are fixedly connected to their adjacent tension springs.
[0010] Furthermore, the limiting cover is fixedly connected to the movable plate, and the limiting cover is slidably connected to the rotating seat.
[0011] Furthermore, the docking assembly includes an electric cylinder. An electric cylinder is installed on one side of the base, and the output end of the electric cylinder is connected to a drive plate. The drive plate is slidably connected to a guide post. A spring seat is symmetrically installed on one side of the drive plate, and a drive post is fixedly connected to the upper end of the drive plate. A sliding post is symmetrically installed on the outer side of one end of the drive post, and a drive sleeve is fitted on the outer side of the drive post. A drive groove is opened on the inner side of the drive sleeve, and a synchronous shaft is slidably connected to one end of the drive sleeve. Gears are fixedly connected to the outer sides of both the drive sleeve and the synchronous shaft, and a gear ring meshes on one side of the gear.
[0012] Furthermore, the spring seat is fixedly connected to the movable plate, and the movable plate is rotatably connected to the drive sleeve.
[0013] Furthermore, one end of the synchronous shaft is prismatic, and the synchronous shaft is rotatably connected to the fixed plate.
[0014] Furthermore, two toothed rings are provided, and the two toothed rings are respectively fixedly connected to the rotating seat and the second clamping assembly.
[0015] This invention provides a coaxiality correction and clamping mechanism for welding guide rails on a test bench, which has the following advantages: 1. During the clamping and docking process of the guide rails, the present invention can automatically insert the positioning pin into the corresponding positioning hole by relying on the continuous pull of the spring, quickly complete the coaxiality correction of the docking ends of the two guide rails, effectively constrain the offset, and improve the splicing accuracy. At the same time, through the mechanical linkage of the limiting cover and the limiting roller, the positioning pin located in the welding area can be automatically moved away during welding to avoid the working space. When switching welding surfaces, it can be automatically reset and locked, realizing the alternating avoidance and continuous locking of the correction positioning structure. The entire process is adaptively adjusted without manual operation. In addition, the component can automatically control the opening and closing state of the baffle through the gravity linkage of the counterweight, the pull rope and the baffle. It is normally closed in the welding area to block welding slag and protect the precision mating surface, and normally open in the operating area to facilitate docking. The structure is simple and reliable, effectively improving the durability and smoothness of operation of the device.
[0016] 2. This invention drives the lifting frame by rotating the screw sleeve, which can control the lifting of the upper clamping plate and the opening and closing of the two side clamping plates in a coordinated manner. Before placing the guide rail, the operating space can be pre-adjusted to be larger. After placing the guide rail, the reverse operation can be performed first, with the upper clamping plate pressing down to fix it. Then, the two side clamping plates move towards each other automatically under the linkage, completing the lateral centering and clamping of the guide rail. This purely mechanical linkage design can adaptively clamp guide rails of different widths and specifications, and automatically achieve centering and positioning. This not only broadens the application range of the equipment, but also lays a good foundation for subsequent precise docking and welding.
[0017] 3. The docking and rotation drive mechanism of this invention uses a single electric cylinder as a power source, combined with mechanical transmission, to achieve integrated docking and rotation operations. The starting electric cylinder smoothly drives the movable plate first, completing the precise alignment and docking of the ends of the two guide rails. When it is necessary to switch welding surfaces, the continued drive of the electric cylinder can be converted into the synchronous rotation of two sets of clamping components through the cooperation of the sliding column and the drive groove, thereby adjusting the guide rail posture. After rotating to the target angle, the straight groove structure can automatically lock, ensuring a stable weld. This design integrates the propulsion, rotation, and locking functions into a single drive system, simplifying the power and electrical control structure and reducing manufacturing costs. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall front view of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention; Figure 2 This is a schematic diagram of the overall rear view structure of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention; Figure 3 This is a schematic diagram of the first clamping component of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention; Figure 4 This is a schematic diagram of the internal structure of the lifting frame of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention; Figure 5This is a schematic diagram of the docking component of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention; Figure 6 This is a perspective view of the drive sleeve structure of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention. Figure 7 This is a schematic diagram of the baffle structure of a test bench guide rail welding coaxiality correction clamping mechanism according to the present invention.
[0019] In the diagram: 1. Base; 2. Fixing plate; 3. Guide post; 4. Movable plate; 5. First clamping assembly; 501. Rotating seat; 502. Support plate; 503. Screw sleeve; 504. Screw; 505. Lifting frame; 506. Telescopic rod; 507. Slide rod; 508. Compression spring; 509. Upper clamping plate; 510. Connecting plate; 511. Connecting plate; 512. Side clamping plate; 513. Smooth rod; 6. Second clamping assembly; 7. Docking assembly; 01. Electric cylinder; 702. Drive plate; 703. Spring seat; 704. Drive column; 705. Sliding column; 706. Drive sleeve; 707. Drive groove; 708. Synchronous shaft; 709. Gear; 710. Gear ring; 8. Calibration assembly; 801. Tension spring; 802. Fixing block; 803. Positioning pin; 804. Positioning hole; 805. Limiting roller; 806. Limiting cover; 807. Counterweight; 808. Pull rope; 809. Baffle. Detailed Implementation
[0020] Please see Figures 1 to 4 This invention provides a technical solution: a coaxiality correction clamping mechanism for welding guide rails on a test bench, comprising a base 1 and a calibration assembly 8. A fixed plate 2 is mounted on the top of one end of the base 1, and guide posts 3 are symmetrically fixedly connected to one side of the lower part of the fixed plate 2. A movable plate 4 is slidably connected to the outer side of the guide posts 3, and a first clamping assembly 5 is provided on the upper part of the movable plate 4. The first clamping assembly 5 includes a rotating seat 501, a support plate 502 is fixedly connected to the inner side of the rotating seat 501, and a threaded sleeve 503 is rotatably connected to the upper part of the rotating seat 501. A screw 504 is threadedly connected to the inside of the threaded sleeve 503, and a lifting frame 505 is fixedly connected to the bottom of the screw 504. A symmetrically arranged top part of the lifting frame 505 is provided with... The telescopic rod 506 is slidably connected to the lower center of the lifting frame 505, the telescopic rod 506 is fixedly connected to the rotating seat 501, and the rotating seat 501 is rotatably connected to the movable plate 4. A compression spring 508 is sleeved on the lower outer side of the slide rod 507, and an upper clamping plate 509 is fixedly connected to the bottom of the slide rod 507. A connecting plate 510 is fixedly connected to the top of the slide rod 507, and connecting plates 511 are rotatably connected to both sides of the connecting plate 510. A side clamping plate 512 is rotatably connected to the lower part of the connecting plate 511, and a smooth rod 513 is slidably connected to the upper part of the side clamping plate 512. The smooth rod 513 is fixedly connected to the lifting frame 505, and the lifting frame 505 abuts against the compression spring 508. The specific operation is as follows: When the screw sleeve 503 is rotated, the telescopic rod 506 and the lifting frame 505 can limit the rotation of the screw 504, restricting the screw 504 from rotating synchronously with the screw sleeve 503. Relying on the thread transmission principle, the lifting frame 505 can be moved upward as a whole, driving the upper clamping plate 509 away from the support plate 502, effectively increasing the internal spacing of the clamping structure, reserving sufficient space for the placement and disassembly of the guide rail to be processed, and facilitating the quick placement of the workpiece. At the same time, the compression spring 508 simultaneously forms an elastic pushing action on the upper clamping plate 509, and pulls the connecting plate 510 through the slide rod 507, further driving the connecting plate 511 to extend and retract, causing the side clamping plate 512 to expand to both sides along the axial direction of the smooth rod 513. After the guide rail is placed stably on the bearing surface of the support plate 502, the screw sleeve 503 is rotated in the opposite direction, which can drive the various structures to move in the opposite direction. First, the upper clamping plate 509 is pressed down to stabilize the guide rail. The clamping limit is set on the surface of the support plate 502. Subsequently, as the lifting frame 505 continues to descend, the compression spring 508 gradually contracts and stores force, and the slide rod 507 moves down accordingly. Through the connecting plate 510, it pulls the connecting plate 511 to swing and drive the two side clamping plates 512 to move towards each other and center. The automatic centering and clamping operation is completed from both sides of the guide rail. This structure adopts a mechanical transmission method with thread adjustment and spring linkage. During the workpiece clamping process, it can adaptively adapt to guide rails of different widths and sizes, automatically complete the centering and positioning, greatly expand the applicability and versatility of the overall device, reduce the limitations of equipment use, and at the same time achieve synchronous lateral initial positioning of the two sets of docking guide rails, effectively correct the guide rail placement deviation, and ensure that the placement position of the guide rails on both sides is regular and uniform. This lays a good foundation for subsequent guide rail end docking, coaxiality correction and welding operations, and significantly improves the overall accuracy of guide rail docking assembly.
[0021] Please see Figure 1 , Figure 5 and Figure 6A second clamping assembly 6 is provided on the upper part of the fixing plate 2, and the structure of the second clamping assembly 6 is the same as that of the first clamping assembly 5. A docking assembly 7 is connected to one side of the second clamping assembly 6 and the first clamping assembly 5. The docking assembly 7 includes an electric cylinder 701. The electric cylinder 701 is placed on one side of the base 1, and the output end of the electric cylinder 701 is connected to a drive plate 702. The drive plate 702 is slidably connected to the guide post 3. A spring seat 703 is symmetrically arranged on one side of the drive plate 702, and a drive post 704 is fixedly connected to one end of the upper part of the drive plate 702. A sliding post 705 is symmetrically arranged on the outer side of one end of the drive post 704. A drive sleeve 706 is fitted on the outer side of 04. A spring seat 703 is fixedly connected to a movable plate 4, and the movable plate 4 is rotatably connected to the drive sleeve 706. A drive groove 707 is opened on the inner side of the drive sleeve 706. A synchronous shaft 708 is slidably connected to one end of the drive sleeve 706. One end of the synchronous shaft 708 is prismatic and is rotatably connected to the fixed plate 2. Gears 709 are fixedly connected to the outer sides of both the drive sleeve 706 and the synchronous shaft 708. A gear ring 710 is meshed on one side of the gear 709. There are two gear rings 710, and the two gear rings 710 are fixedly connected to the rotating seat 501 and the second clamping assembly 6, respectively. The specific operation is as follows: During the docking operation at the end of the guide rail, the electric cylinder 701 can be activated to drive the drive plate 702 to slide smoothly along the outside of the guide post 3. At this time, the spring on the outside of the spring seat 703 can drive the movable plate 4 to move synchronously. The damper installed inside the spring seat 703 can effectively buffer the impact of movement and reduce mechanical shaking, greatly improving the running stability and transmission smoothness of the overall structure during the translation process, and avoiding component offset and vibration, thereby accurately completing the alignment and docking operation of the two guide rails to be welded. When it is necessary to switch the guide rail welding working surface or adjust the welding angle later, it is only necessary to activate the electric cylinder 701 again to achieve linkage adjustment. As the distance between the drive plate 702 and the movable plate 4 gradually decreases, the compression spring 508 is compressed and contracted, and the drive post 704 continues to insert into the drive sleeve 706, causing the sliding post 705 to slide along the channel of the drive groove 707. When the sliding post 705 slides to the inclined section of the drive groove 707, it can be used to... The inclined groove guides the drive sleeve 706 to rotate circumferentially. Then, through the meshing transmission of the synchronous shaft 708, gear 709 and gear ring 710, the first clamping component 5 and the second clamping component 6 are driven to rotate synchronously in the same direction, realizing automatic reversal of the guide rail posture, quickly switching welding positions, and meeting the needs of multi-face continuous welding processing of the guide rail. When the sliding column 705 slides to the straight groove section of the drive groove 707, the straight groove structure can limit the circumferential displacement of the sliding column 705, thereby locking the rotation angle of the clamping component, realizing angle self-locking positioning, and ensuring that the guide rail posture is stable and without deviation during the welding operation. This mechanism relies on the electric cylinder 701 as a single power source, combined with mechanical groove transmission and gear 709 meshing linkage to realize the integrated operation of guide rail docking and rotation adjustment. There is no need to add independent rotation drive components such as motors and rotary cylinders, simplifying the power structure and electrical control layout of the equipment, reducing the number of parts, and effectively reducing the overall manufacturing and maintenance costs of the equipment.
[0022] Please see Figure 2 , Figure 4 , Figure 5 and Figure 7The calibration component 8 is located in the middle of the first clamping component 5 and the second clamping component 6. The calibration component 8 includes a tension spring 801, one end of which is fixedly connected to a fixing block 802. Positioning pins 803 are symmetrically arranged on one side of the fixing block 802. A positioning hole 804 is provided in the middle of the second clamping component 6. A limiting roller 805 is rotatably connected to the top of the fixing block 802. A limiting cover 806 is provided above the limiting roller 805. The limiting cover 806 is fixedly connected to the movable plate 4 and slidably connected to the rotating seat 501. The first clamping component 5... A counterweight 807 is slidably connected to the outer side of one end of the middle part, and a pull rope 808 is fixedly connected to one end of the counterweight 807. A baffle 809 is fixedly connected to one end of the pull rope 808. The support plate 502, the upper clamping plate 509, the side clamping plate 512 and the second clamping assembly 6 are slidably connected to their adjacent counterweights 807, and the support plate 502, the upper clamping plate 509, the side clamping plate 512 and the second clamping assembly 6 are rotatably connected to their adjacent baffles 809, and the support plate 502, the upper clamping plate 509 and the side clamping plate 512 are fixedly connected to their adjacent tension springs 801. The specific operation is as follows: After the guide rail is clamped and fixed using the first clamping component 5 and the second clamping component 6, during the process of completing the docking operation of the two guide rail ends using the docking component 7, the tension spring 801 set at the support plate 502 and the side clamping plate 512 will continuously pull the fixing block 802, driving the positioning pin 803 to extend in the direction of the guide rail docking point. Since the outer diameter of the positioning pin 803 is precisely matched with the diameter of the positioning hole 804, and both ends are provided with a chamfer structure for guidance, the positioning pin 803 can be smoothly inserted into the corresponding positioning hole 804 on the second clamping component 6 by relying on the precise insertion and cooperation between the positioning pin 803 and the positioning hole 804 during the docking and assembly of the two guide rails. The system quickly completes coaxiality correction, effectively constrains the offset of the guide rail docking position, significantly improves the guide rail splicing accuracy, and avoids problems such as coaxial deviation and structural deformation after welding. At the same time, the limiting cover 806 can physically block and limit the adjacent limiting roller 805, thereby controlling the positioning pin 803 of the upper clamping plate 509 to automatically move away from the area above the guide rail, actively avoiding the welding operation area at the top of the guide rail and reserving sufficient working space. When the guide rail needs to be rotated for welding on other sides, the limiting roller 805, which was originally blocked by the limiting cover 806, will disengage from the side of the limiting cover 806 with the structural linkage, releasing the limiting constraint. The corresponding positioning pin 803 can then automatically insert into the matching positioning hole 804 to continuously lock the guide rail docking. The positioning system maintains stable coaxiality accuracy at the guide rail connection point. Simultaneously, the next set of limit rollers 805 moves to the upper side of the limit cover 806, cyclically achieving alternating avoidance and positioning of the positioning structure. This ensures that no positioning pin 803 obstructs the guide rail throughout the entire process. The entire process relies on mechanical linkage for adaptive adjustment, eliminating the need for manual adjustment of positioning components. It is simple to operate and highly automated. The upper baffle 809 automatically flips and closes under its own weight, covering the end area of the positioning pin 803 and the opening of the positioning hole 804 in real time. This effectively blocks welding slag, iron filings, and other impurities generated during welding, preventing them from falling into the gap between the hole and the pin, and avoiding the accumulation of impurities that could cause the fixed block 802 and the positioning pin 803 to jam. The system effectively protects and corrects the positioning structure from plug-in jamming, extends the service life of each component, and improves the long-term stability of the mechanism. Meanwhile, the counterweights 807 mounted on both sides continuously pull the ropes 808 under gravity, keeping the corresponding baffles 809 in a normally open state. This provides ample operating space for guide rail docking and alignment, reducing the difficulty of workpiece docking and assembly. The baffles 809 installed at the bottom also rely on gravity to stably maintain an open state. Through the mechanical gravity linkage of the counterweights 807, ropes 808, and multiple baffles 809, the equipment forms a fixed opening and closing logic during operation, ensuring that the upper baffle 809 is always automatically closed for dust prevention, while the other baffles 809 are normally open.The entire process requires no manual adjustment or switching by operators, simplifying the workflow and reducing manual steps. The overall structure employs a purely mechanical linkage design, eliminating the need for electrical control assistance. This results in a low failure rate and strong adaptability, further improving the overall efficiency and practicality of guide rail welding and straightening operations.
[0023] In summary, this coaxiality correction and clamping mechanism for the test bench guide rail welding is used as follows: First, rotating the threaded sleeve 503, since the telescopic rod 506 and the lifting frame 505 can limit the rotation of the screw 504, restricting the screw 504 from rotating synchronously with the threaded sleeve 503, the lifting frame 505 can be moved upward by the threaded transmission, driving the upper clamping plate 509 away from the support plate 502, effectively increasing the internal spacing of the clamping structure, reserving sufficient space for the placement and disassembly of the guide rail to be processed, and facilitating the quick placement of the workpiece. At the same time, the compression spring 508 simultaneously forms an elastic pushing action on the upper clamping plate 509, and pulls the connecting plate 510 through the slide rod 507, further driving the connecting plate 511 to extend and retract, causing the side clamping plate 512 to move along the smooth rod. The axial direction of 513 expands to both sides. Then, after the guide rail is placed smoothly on the bearing surface of the support plate 502, the screw sleeve 503 is rotated in the opposite direction to drive the various structures to move in the opposite direction. First, the upper clamping plate 509 is pressed down to firmly press and limit the guide rail on the surface of the support plate 502. Subsequently, as the lifting frame 505 continues to descend, the compression spring 508 gradually contracts and stores force, and the slide rod 507 moves down and pulls the connecting plate 511 to swing through the connecting plate 510, driving the two side clamping plates 512 to move towards each other and move closer to the center. The automatic centering and clamping operation is completed from both sides of the guide rail. Similarly, the second clamping component 6 clamps and fixes the other guide rail. Next, start the electric cylinder 701 to drive the drive plate 702 to slide smoothly along the outside of the guide post 3. At this time, the spring on the outside of the spring seat 703 can drive the movable plate 4 to move synchronously. The damper installed inside the spring seat 703 can effectively buffer the impact of movement and reduce mechanical shaking, greatly improving the running stability and transmission smoothness of the overall structure during the translation process, avoiding component offset and vibration, thereby accurately completing the alignment and docking operation of the two guide rails to be welded. Then, during the docking operation of the two guide rails, the tension springs 801 set at the support plate 502 and the side clamping plate 512 will continuously pull the fixing block 802, driving the positioning pin 803 to extend in the direction of the guide rail docking. Since the outer diameter of the positioning pin 803 is precisely matched with the diameter of the positioning hole 804, and both ends are provided with chamfered structures for guidance, the positioning pin 803 can be smoothly inserted into the corresponding positioning hole 804 on the second clamping component 6 by relying on the precise insertion and cooperation between the positioning pin 803 and the positioning hole 804. During the docking and assembly of the two guide rails, the coaxiality correction can be quickly completed, effectively constraining the offset of the guide rail docking position, greatly improving the guide rail splicing accuracy, and avoiding problems such as coaxial deviation and structural deformation after welding. At the same time, the limiting cover 806 can form a physical blocking limit on the adjacent limiting roller 805, thereby controlling the positioning pin 803 matched with the upper clamping plate 509. 03 Automatically moves away from the area above the guide rail, actively avoiding the welding operation area at the top of the guide rail, leaving sufficient working space. The baffle 809 installed at the top can automatically flip down and close under its own gravity, covering the end area of the positioning pin 803 and the opening of the positioning hole 804 in real time. This effectively blocks impurities such as welding slag and iron filings generated during the welding process, preventing impurities from falling into the gap between the hole and the pin body. This avoids the accumulation of impurities causing the fixed block 802 and positioning pin 803 to jam or become stuck. It effectively protects the correction and positioning structure, extends the service life of each component, and improves the long-term stability of the mechanism. At the same time, the counterweights 807 installed on both sides will continuously pull the rope 808 under the action of gravity. The pull force keeps the baffle 809 at the corresponding position in a normally open state, providing sufficient operating space for guide rail docking and alignment assembly, reducing the difficulty of workpiece docking and assembly. The baffle 809 installed at the bottom also relies on gravity to stably keep it in an open state. Finally, when it is necessary to switch the welding working surface of the guide rail or adjust the welding angle, simply restart the electric cylinder 701 to achieve linkage adjustment. As the distance between the drive plate 702 and the movable plate 4 gradually decreases, the compression spring 508 is compressed and contracted, and the drive column 704 continues to insert into the drive sleeve 706, causing the sliding column 705 to slide along the channel of the drive groove 707. When the sliding column 705 slides to the inclined section of the drive groove 707, the slope of the inclined groove can be used to drive the drive sleeve 706 to rotate circumferentially. Then, through the meshing transmission of the synchronous shaft 708, gear 709 and gear ring 710, the first clamping assembly 5 and the second clamping assembly 6 are driven to rotate synchronously in the same direction, realizing the automatic reversal of the guide rail posture, quickly switching the welding position, and meeting the needs of multi-face continuous welding processing of the guide rail. When the sliding column 705 slides to the straight section of the drive groove 707, In the groove section area, the straight groove structure can limit the circumferential displacement of the sliding column 705, thereby locking the rotation angle of the clamping component and realizing angle self-locking positioning. This ensures that the guide rail posture is stable and without deviation during the welding operation. During the rotation, the limiting roller 805, which was originally blocked by the limiting cover 806, will disengage from the side of the limiting cover 806 in conjunction with the structure, releasing the limiting constraint. The corresponding positioning pin 803 can then automatically insert into the matching positioning hole 804, continuously locking the guide rail docking position and stably maintaining the coaxiality accuracy at the guide rail docking point. At this time, the next set of limiting rollers 805 will move synchronously to the upper side of the limiting cover 806, cyclically realizing the alternating avoidance and positioning of the positioning structure. It can keep the guide rail unobstructed by the positioning pin 803 throughout the entire process. The entire process relies on mechanical linkage for adaptive adjustment, without the need for manual additional adjustment of the positioning components. The operation is simple and highly automated.
[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0025] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.
Claims
1. A test stand rail welding coaxiality correction clamping mechanism, characterized in that, The system includes a base (1) and a calibration component (8). A fixed plate (2) is mounted on the top of one end of the base (1), and guide posts (3) are symmetrically fixed to one side of the lower part of the fixed plate (2). A movable plate (4) is slidably connected to the outer side of the guide posts (3), and a first clamping component (5) is provided on the upper part of the movable plate (4). A second clamping component (6) is provided on the upper part of the fixed plate (2), and the second clamping component (6) has the same structure as the first clamping component (5). A docking component (7) is connected to one side of the second clamping component (6) and the first clamping component (5). The calibration component (8) is located in the middle of the first clamping component (5) and the second clamping component (6). The pre-component (8) includes a tension spring (801), one end of which is fixedly connected to a fixing block (802), and a positioning pin (803) is symmetrically arranged on one side of the fixing block (802). The second clamping component (6) has a positioning hole (804) in the middle. The top of the fixing block (802) is rotatably connected to a limiting roller (805), and a limiting cover (806) is provided above the limiting roller (805). A counterweight (807) is slidably connected to the outer side of one end of the middle of the first clamping component (5), and a pull rope (808) is fixedly connected to one end of the counterweight (807). A baffle (809) is fixedly connected to one end of the pull rope (808).
2. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 1, characterized in that, The first clamping assembly (5) includes a rotating seat (501), a support plate (502) is fixedly connected to the inner side of the rotating seat (501), and a threaded sleeve (503) is rotatably connected to the upper part of the rotating seat (501). A screw rod (504) is threadedly connected to the inside of the threaded sleeve (503), and a lifting frame (505) is fixedly connected to the bottom of the screw rod (504). Telescopic rods (506) are symmetrically arranged on the top of the lifting frame (505), and a telescopic rod (506) is located in the lower part of the lifting frame (505). A sliding rod (507) is slidably connected to the center. A compression spring (508) is sleeved on the lower outer side of the sliding rod (507). An upper clamping plate (509) is fixedly connected to the bottom of the sliding rod (507). A connecting plate (510) is fixedly connected to the top of the sliding rod (507). Connecting plates (511) are rotatably connected to both sides of the connecting plate (510). A side clamping plate (512) is rotatably connected to the lower part of the connecting plate (511). A smooth rod (513) is slidably connected to the upper part of the side clamping plate (512).
3. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 2, characterized in that, The telescopic rod (506) is fixedly connected to the rotating seat (501), and the rotating seat (501) is rotatably connected to the movable plate (4).
4. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 2, characterized in that, The light rod (513) is fixedly connected to the lifting frame (505), and the lifting frame (505) abuts against the compression spring (508).
5. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 2, characterized in that, The support plate (502), upper clamping plate (509), side clamping plate (512) and second clamping assembly (6) are slidably connected to their adjacent counterweights (807), and the support plate (502), upper clamping plate (509), side clamping plate (512) and second clamping assembly (6) are rotatably connected to their adjacent baffles (809), and the support plate (502), upper clamping plate (509) and side clamping plate (512) are fixedly connected to their adjacent tension springs (801).
6. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 2, characterized in that, The limiting cover (806) is fixedly connected to the movable plate (4), and the limiting cover (806) is slidably connected to the rotating seat (501).
7. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 2, characterized in that, The docking assembly (7) includes an electric cylinder (701). An electric cylinder (701) is installed on one side of the base (1), and the output end of the electric cylinder (701) is connected to a drive plate (702). The drive plate (702) is slidably connected to the guide post (3). A spring seat (703) is symmetrically installed on one side of the drive plate (702), and a drive post (704) is fixedly connected to one end of the upper part of the drive plate (702). A sliding post (705) is symmetrically installed on the outer side of one end of the drive post (704), and a drive sleeve (706) is sleeved on the outer side of the drive post (704). A drive groove (707) is opened on the inner side of the drive sleeve (706), and a synchronous shaft (708) is slidably connected to one end of the drive sleeve (706). A gear (709) is fixedly connected to the outer side of both the drive sleeve (706) and the synchronous shaft (708), and a gear ring (710) meshes on one side of the gear (709).
8. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 7, characterized in that, The spring seat (703) is fixedly connected to the movable plate (4), and the movable plate (4) is rotatably connected to the drive sleeve (706).
9. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 7, characterized in that, One end of the synchronous shaft (708) is prismatic, and the synchronous shaft (708) is rotatably connected to the fixed plate (2).
10. The test bench guide rail welding coaxiality correction clamping mechanism according to claim 7, characterized in that, Two toothed rings (710) are provided, and the two toothed rings (710) are fixedly connected to the rotating seat (501) and the second clamping assembly (6) respectively.