Automatic welding and rotating tool for piston rod

Abstract

The utility model discloses a piston rod automatic welding rotating tool which comprises a welding base, and a supporting table used for supporting and placing the center end of a piston rod and rotating the piston rod to be welded with a lug ring after the piston rod is clamped is arranged at the end of the welding base. By means of the lug ring adjusting base and the moving table which are driven by the air cylinder, pneumatic adjustment of the transverse position and the height can be automatically completed according to the piston rods of different sizes, and the piston rods of different sizes can be welded in a rotating mode. Frequent manual clamp replacement and manual calibration are replaced, and the welding adaptation efficiency and the positioning precision of workpieces of multiple specifications are remarkably improved. The air cylinder B of the lug ring inner ring pneumatic clamping structure is adopted to drive the L-shaped clamping block, clamping force evenly acts on the inner ring of the workpiece, the deformation problem caused by traditional external clamping is avoided, and it is guaranteed that the workpiece is stably stressed in the welding process.

Description

Technical Field

[0001] This utility model belongs to the field of piston rod welding technology, specifically relating to an automatic piston rod welding rotary fixture. Background Technology

[0002] In the field of mechanical manufacturing, the welding of piston rods and lugs is a crucial process in the production of key components such as hydraulic cylinders and pneumatic cylinders. Welding accuracy and efficiency directly affect the overall performance of the equipment. Traditional piston rod welding fixtures generally suffer from low automation and poor adaptability: on the one hand, positioning and adjustment for piston rods of different sizes rely on manual operation, requiring frequent fixture changes or manual calibration, resulting in low production efficiency and difficulty in guaranteeing positioning accuracy; on the other hand, the alignment and matching of lugs and piston rods often employs external clamping, which is prone to workpiece deformation due to uneven clamping force, and cannot achieve dynamic matching with synchronous rotation during welding, leading to unstable weld quality. Furthermore, the support mechanisms of existing fixtures are mostly fixed structures, making it difficult to provide stable support for the center end of the piston rod, easily causing vibration and displacement during welding, further affecting welding accuracy. Utility Model Content

[0003] The purpose of this invention is to provide an automatic welding rotary fixture for piston rods to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic welding rotary tooling for piston rods, comprising:

[0005] The welding base has a support platform at its end for supporting and placing the center end of the piston rod, which is then clamped and rotated for welding with the earring. The support platform is equipped with lifting and positioning rollers that cooperate with the support platform to press the piston rod and rotate it for welding.

[0006] The welding base is provided with a movable platform on one side for pneumatic adjustment of piston rods of different sizes. The upper surface of the movable platform is provided with a lifting clamping mechanism for clamping one end of the piston rod and rotating it during welding.

[0007] The upper end face of the welding base is provided with an earring adjustment seat through a sliding groove for laterally adjusting the earring part that needs to be rotated and welded to one end of the piston rod. The upper end face of the earring adjustment seat is provided with an earring clamp for clamping the earring workpiece from the inner ring and rotating and welding it with the piston rod.

[0008] Preferably, the earring adjustment seat slides within the groove, and the front and rear sides of the earring adjustment seat are laterally provided with a directional guide rod to guide its sliding. A sliding guide block is slidably provided on the directional guide rod and fixedly connected to the side of the earring adjustment seat. A cylinder A is connected to the right side of the earring adjustment seat and is fixed inside one end of the groove. The lateral position of the earring workpiece can be automatically adjusted according to the piston rod of different sizes, eliminating the need for frequent manual changes of fixtures or manual calibration, thus solving the problem of poor adaptability of traditional tooling.

[0009] Preferably, one side of the earring clamp has an L-shaped rotating seat that rotates via a pivot rod. The inner side of the rotating seat is provided with an earring clamp seat, and the upper end face of the earring clamp seat has a cross groove. Cylinders B are provided on the inner sides of the four directions of the cross groove. An L-shaped clamping block is fixed to one end of cylinder B to clamp the inner ring of the earring, which is rotatably welded to one end of the piston rod, outward. Cylinder G is provided at the bottom of the earring clamp, and the bottom end of cylinder G is fixed to the position of the upper end face of the earring adjusting seat. It can rotate synchronously with the piston rod to achieve dynamic coordination during the welding process, solve the problem of unstable weld quality, and ensure that the welding trajectory is uniform and continuous.

[0010] Preferably, the end of the support platform is provided with a trapezoidal groove, and the inclined walls on both sides inside the trapezoidal groove are provided with support rollers to support the piston rod and rotate it for welding. A frame is erected in the middle of the support platform, and a cylinder C is provided at the center of the top of the inner side of the frame. The bottom of the cylinder C is provided with a mounting frame. The support rollers can rotate with the piston rod, providing stable rotational support for the welding process and solving the accuracy problem caused by insufficient center support of traditional tooling.

[0011] Preferably, the lifting and positioning roller is fixed at an angle downwards on the inner side of the mounting frame. A servo drive motor is provided on the external drive of the support of one side of the lifting and positioning roller. The lifting and positioning roller cooperates with the support roller to clamp and rotate the piston rod in the middle for welding, ensuring that the piston rod and the lug rotate synchronously and at a uniform speed during the welding process. It works with the support roller to form a stable clamp, further improving the welding accuracy and weld consistency.

[0012] Preferably, a cylinder D is provided in the cavity on the other side of the welding base, and one end of the cylinder D is fixed to one side of the moving table. A cylinder E is provided at the end of the moving table. The upper end of the cylinder E is fixed to the bottom of the lifting clamping mechanism for lifting and lowering, so as to realize automatic positioning and height adjustment of the piston rod end, reduce manual adjustment steps, and improve the versatility of the tooling for multi-specification piston rods and production efficiency.

[0013] Preferably, the lifting and clamping mechanism includes a lifting plate fixed on the cylinder E, and a rotating top plate that rotates synchronously with the piston rod and is pressed against one side of the lifting plate via a rotating shaft. The upper and lower ends of one side of the rotating top plate are provided with cylinders F, and the bottom end of the cylinders F is fixed with a positioning clamping block that clamps one end of the piston rod and has a clamping arc groove, to ensure stable end clamping during welding, and together with the middle support mechanism, to form a stable positioning of the entire shaft section.

[0014] Compared with the prior art, the technical effects and advantages of this utility model are: the automatic welding rotary tooling for piston rods...

[0015] 1. The earring adjustment seat and moving stage driven by the cylinder can automatically complete the pneumatic adjustment of the lateral position and height according to the piston rod of different sizes, replacing the frequent manual change of fixtures and manual calibration, and significantly improving the welding adaptation efficiency and positioning accuracy of multi-specification workpieces.

[0016] 2. The inner ring of the earring is pneumatically clamped (cylinder B drives L-shaped clamping block), and the clamping force is evenly applied to the inner ring of the workpiece, avoiding the deformation problem caused by traditional external clamping and ensuring the stability of the workpiece under force during the welding process.

[0017] 3. The earring clamp and the lifting and positioning roller are driven by a servo motor to achieve synchronous and uniform rotation of the earring and the piston rod. Together with the central support roller, they form a three-point stable clamping, which solves the problem of uneven weld quality and ensures a continuous and uniform welding trajectory.

[0018] 4. The support rollers in the trapezoidal groove of the support platform cooperate with the inclined lifting and positioning rollers to form dynamic support for the center end of the piston rod, effectively reducing welding vibration and offset; the arc-shaped positioning clamping block and rotating top plate of the end clamping mechanism achieve stable positioning of the entire shaft section and improve the overall welding accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a side view of the frame of this utility model;

[0021] Figure 3 This is a top view of the earring clamp base of this utility model;

[0022] Figure 4 This is a side view of the lifting and clamping mechanism of this utility model.

[0023] In the diagram: 1. Welding base; 2. Support platform; 3. Lifting and positioning roller; 4. Moving platform; 5. Lifting and clamping mechanism; 6. Slide groove; 7. Earring adjustment seat; 8. Earring clamp seat; 9. Guiding guide rod; 10. Sliding guide block; 11. Cylinder A; 12. Rotating seat; 13. Earring clamp seat; 14. Cross groove; 15. Cylinder B; 16. L-shaped clamp block; 17. Support roller; 18. Frame; 19. Cylinder C; 20. Mounting frame; 21. Servo drive motor; 22. Cylinder D; 23. Cylinder E; 24. Lifting plate; 25. Rotating top plate; 26. Positioning clamp block; 27. Cylinder G; 28. Cylinder F. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: an automatic welding rotary tooling for piston rods, comprising:

[0026] The welding base 1 effectively supports the weight of subsequent components and the workpiece to be welded, ensuring that the tooling does not shake or shift during the entire welding process, providing a solid guarantee for precise welding. At the end of the welding base 1 is a support platform 2 for supporting and clamping the center end of the piston rod before rotation and welding with the lug. The support platform 2 is made of high-quality aluminum alloy and precision-machined, resulting in a smooth surface and extremely high precision. A lifting and positioning roller 3, which works in conjunction with the support platform 2 to press the piston rod and allow it to rotate for welding, is mounted on the support platform 2. Its tilt angle has been precisely calculated and adjusted to form an efficient and stable three-point clamping structure together with the support roller 17. The lifting and positioning roller 3 is made of special alloy steel with a hardened surface, possessing extremely high hardness and wear resistance.

[0027] A movable stage 4 is provided on one side of the welding base 1 for pneumatic adjustment of piston rods of different sizes. The movable stage 4 adopts a high-precision linear slide rail and slider structure and is installed on a specific track of the welding base 1, which can achieve precise lateral movement. The upper end face of the movable stage 4 is provided with a lifting clamping mechanism 5 for clamping one end of the piston rod and rotating it during welding. The lifting power of the lifting clamping mechanism 5 is provided by the cylinder E23 at the end of the movable stage 4.

[0028] The upper surface of the welding base 1 is provided with an earring adjustment seat 7 through a sliding groove 6 for lateral adjustment of the earring part that needs to be rotated and welded to one end of the piston rod. The sliding groove 6 enables the earring adjustment seat 7 to slide precisely laterally.

[0029] The upper end face of the earring adjustment seat 7 is provided with an earring clamp 8 that clamps the earring workpiece from the inner ring and rotates and is welded with the piston rod.

[0030] The earring adjustment seat 7 slides within the groove 6. A directional guide rod 9, made of high-strength stainless steel with a precision-polished surface, is laterally positioned on the front and rear sides of the earring adjustment seat 7 to guide its sliding motion. A sliding guide block 10, fixedly connected to the side of the earring adjustment seat 7, slides on the directional guide rod 9. A cylinder A11 is connected to the right side of the earring adjustment seat 7, and the cylinder A11 is fixed to one end inside the groove 6. The sliding guide block 10 and the directional guide rod 9 work closely together, providing precise guidance for the sliding of the earring adjustment seat 7 and ensuring that it does not deviate or wobble during lateral movement. The cylinder A11, as the power source for the lateral movement of the earring adjustment seat 7, can precisely push the earring adjustment seat 7 laterally within the groove 6 according to piston rods of different sizes. This enables rapid and precise lateral adjustment of earring components that need to be rotated and welded to one end of the piston rod, ensuring accurate alignment between the earring and the piston rod end.

[0031] An L-shaped rotating seat 12 is rotatable on one side of the earring holder 8 via a rotating shaft. An earring clamp seat 13 is located inside the rotating seat 12, and a cross groove 14 is formed on the upper surface of the earring clamp seat 13. Cylinders B15 are located on the four inner sides of the cross groove 14. Cylinders B15 employ miniature, high-thrust pneumatic components to provide precise and stable thrust. An L-shaped clamping block 16 is fixed to one end of cylinder B15, clamping the inner ring of the earring, which is rotatably welded to one end of the piston rod, to move outwards. Made of high-strength alloy steel, the clamping surface of the 6 is specially treated to increase friction, ensuring that there is no slippage when clamping the inner circle of the earring. When the earring needs to be clamped, the cylinder B15 is activated, pushing the L-shaped clamp 16 to move outward from the inner circle of the earring, clamping the earring evenly. This clamping method from the inner circle effectively avoids the problem of earring deformation caused by uneven external clamping force. The bottom of the earring clamp 8 is equipped with a cylinder G27, and the bottom end of the cylinder G27 is fixed at the position of the upper surface of the earring adjusting seat 7.

[0032] The support platform 2 has a trapezoidal groove at one end, and support rollers 17 are welded to the inclined walls on both sides of the trapezoidal groove to support the piston rod and allow it to rotate. The support rollers 17 are made of high-hardness, wear-resistant rubber material with a stainless steel core, which provides good support friction to ensure that the piston rod is stable and does not slip during rotation, and also has excellent wear resistance, extending its service life. It can provide reliable initial support for the center end of the piston rod placed on it in the initial stage. A frame 18 is erected in the middle of the support platform 2, and a cylinder C19 is located at the center of the top of the inner side of the frame 18, which can accurately control the stroke and output force. The bottom of the cylinder C19 is equipped with a mounting frame 20 to ensure a tight fit with the cylinder C19 and the subsequently installed lifting and positioning rollers 3.

[0033] The lifting and positioning roller 3 is fixed at an angle downward inside the mounting frame 20. The external transmission of the support of the lifting and positioning roller 3 on one side of the frame 18 is provided with a servo drive motor 21, which can precisely control the speed and rotation angle. The lifting and positioning roller 3 cooperates with the support roller 17 to clamp and rotate the piston rod in the middle.

[0034] During welding, cylinder C19 is activated, pushing the mounting frame 20 downwards. This causes the lifting and positioning rollers 3 to gradually press down until they, together with the support rollers 17, stably clamp the middle of the piston rod. At this time, the servo drive motor 21 starts operating, driving the lifting and positioning rollers 3 to rotate through its transmission connection with the support bracket, thereby driving the piston rod to rotate synchronously. This collaborative working method not only provides stable and precisely controllable rotational power for the welding process, but also ensures that the piston rod can rotate at a uniform speed during welding.

[0035] A cylinder D22 is installed in the cavity on the other side of the welding base 1, with one end of cylinder D22 fixed to one side of the moving table 4. A cylinder E23 is installed at the end of the moving table 4, with the upper end of cylinder E23 fixed to the bottom of the lifting clamping mechanism 5 for lifting and lowering. Cylinder D22 is firmly connected to one side of the moving table 4 through a carefully designed connection structure, which can accurately push the moving table 4 to move laterally according to different sizes of piston rods and adjust it to a suitable position to meet the welding requirements of piston rods of different lengths. Cylinder E23 also uses high-precision pneumatic components, which can accurately control the lifting height of the lifting clamping mechanism 5. When the moving table 4 moves to the appropriate position, cylinder E23 is activated, driving the lifting clamping mechanism 5 to rise, so that the positioning clamp 26 is accurately aligned with the end of the piston rod.

[0036] The lifting and clamping mechanism 5 includes a lifting plate 24 fixed to a cylinder E23. A rotating top plate 25, which rotates synchronously with and is clamped to the piston rod, is mounted on one side of the lifting plate 24 via a rotating shaft. Cylinders F28 are mounted on both the upper and lower ends of one side of the rotating top plate 25. A positioning clamping block 26 with a clamping arc-shaped groove is fixed to the bottom of each cylinder F28 to clamp one end of the piston rod. The positioning clamping block 26 in the lifting and clamping mechanism 5 is made of high-strength alloy steel, and its bottom end has a clamping arc-shaped groove that precisely matches the contour of the piston rod. The clamping action of the positioning clamping block 26 is driven by the cylinders F28 mounted on both the upper and lower ends of one side of the rotating top plate 25. The cylinders F28 provide a stable and uniform clamping force, ensuring that the positioning clamping block 26 tightly clamps one end of the piston rod. Simultaneously, due to the design of the clamping arc-shaped groove, the clamping force is evenly distributed on the surface of the piston rod, effectively avoiding damage to the piston rod surface caused by uneven clamping force. In addition, the rotating top plate 25 is connected to the lifting plate 24 via a rotating shaft. This unique connection method allows the rotating top plate 25 to rotate flexibly according to the synchronous rotation of the piston rod, always maintaining a stable clamping of the piston rod end.

[0037] The bottom end of cylinder G27 is fixed to the upper surface of earring adjustment seat 7. Cylinder G27 can precisely adjust the height of earring clamp seat 8, so that the earring workpiece placed on it can be precisely aligned with the end of the piston rod in height, making full preparation for subsequent welding operations. At the same time, since the rotating seat 12 and earring clamp seat 13 are connected by a rotating shaft, when the piston rod rotates, the earring clamp seat 8 can rotate synchronously with the piston rod, so that the earring remains relatively stationary with respect to the piston rod during the welding process.

[0038] Specifically, during use, the piston rod is placed in the trapezoidal groove at the end of the support platform 2, and the support rollers 17 on the inclined walls on both sides of the trapezoidal groove initially lift the piston rod. Subsequently, the cylinder C19 in the frame 18 is activated, pushing the mounting frame 20 down, causing the lifting positioning rollers 3, which are inclined and fixed inside the mounting frame 20, to press down, forming a stable three-point clamping of the piston rod together with the support rollers 17, ensuring the stability of the piston rod's center position during welding and reducing vibration. The cylinder D22 in the concave cavity on the other side of the welding base 1 drives the moving platform 4 to move laterally, adjusting it to a suitable position according to the length of the piston rod. The cylinder E23 at the end of the moving platform 4 drives the lifting clamping mechanism 5 to rise, aligning the positioning clamp 26 with the end of the piston rod. The cylinder F28 drives the positioning clamp 26 to clamp the piston rod, and its clamping arc groove fits the contour of the piston rod, ensuring uniform clamping force and avoiding damage to the piston rod surface. At the same time, the rotating top plate 25 is connected to the lifting plate 24 through the rotating shaft, and can rotate synchronously with the piston rod to ensure stable end clamping.

[0039] The earring workpiece is placed into the cross groove 14 of the earring clamp seat 13. Cylinders B15 on the four inner sides of the cross groove drive the L-shaped clamping blocks 16 to move outwards from the inner ring of the earring, evenly clamping the earring and preventing deformation due to uneven external clamping force. Cylinder G27 at the bottom of the earring clamp seat 8 adjusts the earring height to align it with the end of the piston rod. The earring adjusting seat 7 slides within the slide groove 6, with directional guide rods 9 on its front and rear sides cooperating with sliding guide blocks 10 to provide precise guidance for the sliding of the earring adjusting seat 7. Cylinder A11 is fixed to one end of the slide groove 6, pushing the earring adjusting seat 7 to move laterally, automatically adjusting the lateral position of the earring according to the piston rod size, achieving rapid centering of the earring with the end of the piston rod.

[0040] The servo drive motor 21 inside the frame 18 is connected to the support of the lifting and positioning roller 3 on one side. When the servo drive motor 21 is running, it drives the lifting and positioning roller 3 to rotate, which in turn drives the piston rod to rotate synchronously, providing stable rotational power for welding, ensuring that the piston rod rotates at a uniform speed during the welding process, and ensuring that the weld is uniform. The rotating seat 12 of the earring clamp 8 is connected to the earring clamp seat 13 through the rotating shaft. When the piston rod rotates, the earring clamp 8 can rotate synchronously with the piston rod, so that the earring remains relatively stationary with the piston rod during the welding process, achieving precise welding.

[0041] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A piston rod automatic welding rotary tool characterized by, Include: Welding base (1), the end of the welding base (1) is provided with a support table (2) for supporting and placing the clamped center end of the piston rod for rotation and welding with the ear ring, a lifting positioning roller (3) is arranged on the support table (2) and cooperates with the support table (2) to rotate and weld the piston rod after being pressed. One side of the welding base (1) is provided with a moving table (4) for pneumatic adjustment according to different sizes of piston rods, and the upper end surface of the moving table (4) is provided with a lifting clamping mechanism (5) for clamping and rotating and welding one end of the piston rod during welding. The welding base (1) is provided with an ear ring adjusting seat (7) for transversely adjusting the ear ring part to be rotated and welded with one end of the piston rod through a sliding groove (6) on one side of the upper end surface, and the upper end surface of the ear ring adjusting seat (7) is provided with an ear ring clamping seat (8) for clamping the inner ring of the ear ring part and rotating and welding with the piston rod.

2. A rotating fixture for automatic welding of a piston rod according to claim 1, characterized in that: The ear ring adjusting seat (7) slides in the sliding groove (6), and the front and rear sides of the ear ring adjusting seat (7) are provided with directional guide rods (9) for guiding sliding, and the directional guide rods (9) are provided with sliding guide blocks (10) fixedly connected with the sides of the ear ring adjusting seat (7), and a gas cylinder A (11) is connected to the right side of the ear ring adjusting seat (7), and the gas cylinder A (11) is fixed to the inner end of the sliding groove (6).

3. A rotating fixture for automatic welding of a piston rod according to claim 1, characterized in that: The ear ring clamping seat (8) is provided with a rotating seat (12) of L-shaped structure through a rotating shaft, the inner side of the rotating seat (12) is provided with an ear ring clamp seat (13), the upper end surface of the ear ring clamp seat (13) is provided with a cross groove (14), the inner sides of the four directions of the cross groove (14) are provided with gas cylinders B (15), one end of the gas cylinder B (15) is fixedly provided with an L-shaped clamping block (16) for moving and clamping the inner ring of the ear ring to be rotated and welded with one end of the piston rod, and the bottom of the ear ring clamping seat (8) is provided with a gas cylinder G (27), and the bottom end of the gas cylinder G (27) is fixed to the position of the upper end surface of the ear ring adjusting seat (7).

4. A rotating fixture for automatic welding of a piston rod according to claim 1, characterized in that: The end of the support table (2) is provided with a trapezoidal groove, and the inclined walls on both sides of the trapezoidal groove are provided with support rollers (17) for supporting and rotating and welding the piston rod, the middle of the support table (2) is provided with a frame (18), and the inner side of the frame (18) is provided with a gas cylinder C (19) at the top center position, and the bottom end of the gas cylinder C (19) is provided with a mounting frame (20).

5. A rotating fixture for automatic welding of a piston rod according to claim 4, characterized in that: The lifting positioning roller (3) is fixedly arranged on the inner side of the mounting frame (20) obliquely downward, and the outer transmission of the support of the lifting positioning roller (3) on one side of the frame (18) is provided with a servo drive motor (21), and the lifting positioning roller (3) cooperates with the support roller (17) to clamp the middle of the piston rod and rotate and weld it.

6. A rotating fixture for automatic welding of a piston rod according to claim 1, characterized in that: The concave cavity on the other side of the welding base (1) is provided with a gas cylinder D (22), and one end of the gas cylinder D (22) is fixed to one side of the moving table (4), and the end of the moving table (4) is provided with a gas cylinder E (23), and the upper end of the gas cylinder E (23) is fixed to the bottom of the lifting clamping mechanism (5) for lifting.

7. A rotating fixture for automatic welding of a piston rod according to claim 1, characterized in that: The lifting clamping mechanism (5) comprises a lifting plate (24) fixed on the air cylinder E (23), and one side of the lifting plate (24) is rotatably provided with a rotary top plate (25) according to the synchronous rotation of the piston rod and the pressing, one side of the rotary top plate (25) is provided with an air cylinder F (28) at the upper end and the lower end, and the bottom end of the air cylinder F (28) is fixed with a positioning clamp block (26) which clamps one end of the piston rod and has a clamping arc-shaped groove.

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