Robot welding flexible tooling for galvanized sheet wheel covers

Abstract

The present application relates to welding robot technical field, especially to a kind of galvanized plate wheel cover robot welding flexible tooling, comprising: fixed seat and welding robot, the fixed seat top is provided with the fixed assembly for fixing wheel cover, the fixed assembly includes multiple sliding frames;Multiple the sliding frame is equidistantly slidably provided with sliding piece, the sliding piece top is provided with clamping assembly, and the clamping assembly is used to clamp the bottom of wheel cover;Sliding piece inside is provided with installation cavity, two sliding openings are respectively symmetrically provided in the both sides of sliding piece and communicated with installation cavity, and the installation cavity is provided with pulling assembly;The pulling assembly includes winding wheel, pull rope and magnetic end, the winding wheel is arranged in installation cavity, and the pull rope is wound and arranged on winding wheel, the composite positioning mode used in the present application is specially designed for galvanized plate material characteristics, realizes the dual effect of high-precision positioning and high-stability deformation resistance.

Description

Technical Field

[0001] This invention relates to the field of welding robot technology, and in particular to a flexible tooling for robotic welding of galvanized steel plate wheel covers. Background Technology

[0002] The flexible welding fixture for galvanized steel wheel covers is a modular vision positioning fixture system on the automotive rear wheel cover welding line that can quickly switch between multiple car models and adapt to the characteristics of galvanized steel sheets, solving three major pain points: easy deformation of galvanized steel sheets, difficulty in weld seam tracking, and mixed production lines for multiple car models.

[0003] Patent CN216177813U discloses a flexible welding fixture for wheel arch reinforcement plates, comprising: a bottom support mechanism; a cylinder sliding mechanism installed on the upper part of the bottom support mechanism; a column system located on the upper part of the cylinder sliding mechanism and slidably connected to it, used for moving the column system along the length direction of the cylinder sliding mechanism; and a wheel arch reinforcement plate gripper located on the upper part of the column system, used to drive the gripper holding the wheel arch reinforcement plate forward and backward. This fixture brings the wheel arch reinforcement plate close to a designated position on the car tire, facilitating welding. The wheel arch reinforcement plate gripper can clamp wheel arch reinforcement plates of different sizes, adapting to various vehicle models, and offers advantages such as small footprint and high equipment utilization.

[0004] Currently, the robotic welding fixtures used for galvanized sheet wheel covers generally suffer from poor adaptability, failing to meet the requirements of various wheel covers of different specifications. They also have technical pain points such as high changeover costs and insufficient automation adaptability. In addition, conventional fixtures only clamp the wheel cover at a single point on the edge, failing to provide auxiliary positioning for the curved parts of the wheel cover, making the galvanized sheet prone to warping under welding stress. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flexible robotic welding fixture for galvanized steel plate wheel covers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A flexible robotic welding fixture for galvanized steel wheel covers includes: a fixed base and a welding robot. A fixing assembly for fixing the wheel cover is disposed above the fixed base, and the fixing assembly includes multiple sliding frames. Sliding members are equidistantly arranged on multiple sliding frames, and a clamping assembly is provided above the sliding members for clamping the bottom of the wheel cover; The sliding member has an internal mounting cavity, and two sliding openings communicating with the mounting cavity are symmetrically opened on both sides of the sliding member. A pulling component is provided inside the mounting cavity. The pulling assembly includes a take-up reel, a pull rope, and a magnetic end. The take-up reel is disposed inside the mounting cavity, the pull rope is wound around the take-up reel, and the magnetic end is fixedly installed at the end of the pull rope away from the take-up reel and is used to magnetically fix the wheel cover. The mounting cavity is equipped with four limiting components, which are respectively located inside the four sliding openings and are used to fix the pull rope inside the sliding openings.

[0007] Preferably, the fixing assembly further includes two rotating seats and a placement frame. The two rotating seats are symmetrically fixedly connected to both sides of the fixing seat, and the placement frame is rotatably installed between the two rotating seats. The placement frame is a rectangular frame, and a plurality of sliding frames are equidistantly and vertically fixedly connected inside the placement frame.

[0008] Preferably, the sliding member includes a slider and two pulleys. The slider is slidably mounted on the sliding frame, and the two pulleys are rotatably mounted inside the slider and slidably mounted inside the sliding frame. The mounting cavity is formed inside the slider.

[0009] Preferably, the clamping assembly includes two moving blocks, two clamping blocks, a first drive shaft, and a drive motor. The sliding member has a groove in the middle. The first drive shaft is rotatably installed inside the groove. The drive motor is fixedly connected to the side of the sliding member, and its output end is fixedly connected to the first drive shaft. The two moving blocks are respectively threaded to both ends of the first drive shaft. The two clamping blocks are respectively symmetrically fixedly connected to the upper ends of the two moving blocks, and an inverted V-shaped clamping space is formed in the middle.

[0010] Preferably, the magnetic end includes an iron core rod, a sliding ring, a fixed ring, and a spiral tube. One end of the iron core rod is fixedly connected to the end of the pull rope. The fixed ring is fixedly connected to the end of the iron core rod near the pull rope. The spiral tube is sleeved on the iron core rod, with one end fixedly connected to the fixed ring and the other end fixedly connected to the sliding ring. The sliding ring is slidably sleeved on the iron core rod.

[0011] Preferably, the sliding ring is provided with multiple limiting strips, and the fixed ring is provided with multiple guide openings corresponding to the limiting strips in a ring shape. The guide openings are used to deflect the limiting strips toward the axis of the iron core rod.

[0012] Preferably, a linkage component is provided in the middle of the mounting cavity, and the linkage component is used to drive the limiting component to move.

[0013] Preferably, the linkage assembly includes a second drive shaft, a first gear, and a second gear. The second drive shaft is rotatably disposed inside the mounting cavity and located below the first drive shaft. The first gear is fixedly connected to the middle of the first drive shaft, and the second gear is fixedly connected to the middle of the second drive shaft. The first gear and the second gear are meshed together.

[0014] Preferably, the limiting assembly includes two connecting frames, four extrusion strips, and four extrusion blocks. The two connecting frames are respectively threaded to both ends of the second drive shaft, the two extrusion strips are symmetrically fixedly connected to both ends of the connecting frames, and the four extrusion blocks are respectively fixedly connected to the upper side inside the four sliding ports, forming an extrusion space with the extrusion strips.

[0015] Preferably, the threads on both sides of the first drive shaft are in opposite directions, so that when rotating, they can drive the two moving blocks to move closer or further away from each other synchronously. The threads on both sides of the second drive shaft are in opposite directions, so that when rotating, they can drive the two connecting brackets to move closer or further away from each other synchronously.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Addressing the characteristics of thin, rigid, and easily warped / deformed welded galvanized sheet wheel covers, this invention employs a composite positioning method combining edge-synchronous clamping and curved surface multi-point magnetic attraction and pulling. Bottom clamping ensures overall positioning accuracy, while curved surface pulling counteracts welding stress and suppresses localized deformation, thus solving the welding deformation problem through this dual action. This composite positioning method is specifically designed for the material characteristics of galvanized sheet, achieving both high-precision positioning and high stability against deformation, significantly improving welding pass rate and product accuracy. 2. The clamping assembly solves the problems of uneven clamping force at the bottom of the wheel cover, easy deformation under unilateral force, unreliable clamping, and displacement during welding. At the same time, it solves the defects of traditional fixtures, such as small range of applicable sizes and asynchronous clamping actions. It provides bidirectional synchronous centering clamping with uniform and stable clamping force. It can adapt to wheel cover edges of different thicknesses and widths. The clamping and releasing actions are rapid and the positioning accuracy is high. 3. This invention adopts electromagnetic response real-time constraint, with the action and welding energization sequence synchronized. It has a fast response speed and stable constraint force, realizing active suppression of the deformation of the pull rope. It is specially adapted to the high-precision welding requirements of thin galvanized sheet parts and solves the technical problems of pull rope positioning failure and inability to continuously resist deformation. 4. The present invention uses a first drive shaft and a second drive shaft to achieve synchronous clamping, locking and rope limiting through gear meshing, with a single drive source. This design does not require an additional controller or complex program coordination. It can ensure synchronous action with only a pure mechanical structure, which simplifies the equipment structure, reduces the failure rate, reduces manufacturing costs, and at the same time greatly improves positioning reliability. 5. The limiting component solves the problems of easy slippage of the pull rope, loosening of the magnetic attraction, and detachment due to vibration. At the same time, the limiting locking force is large, and the first drive shaft and the second drive shaft can be driven synchronously through a single drive motor. The pull rope length is precisely locked and is not affected by vibration. The magnetic positioning is stable and reliable throughout the entire process. Attached Figure Description

[0017] Figure 1This is a front structural schematic diagram of a flexible robotic welding fixture for galvanized steel plate wheel covers proposed in this invention. Figure 2 This is a schematic diagram of the fixed component structure of a flexible welding tool for galvanized steel plate wheel covers proposed in this invention. Figure 3 This is a schematic diagram of the sliding component structure of a robotic welding flexible tooling for a galvanized steel wheel cover proposed in this invention. Figure 4 This is a schematic diagram of the clamping assembly structure of a flexible robotic welding fixture for galvanized steel plate wheel covers proposed in this invention. Figure 5 This is a schematic diagram of the linkage component structure of a robotic welding flexible tooling for galvanized steel wheel covers proposed in this invention. Figure 6 This is a schematic diagram of the limiting component structure of a robotic welding flexible tooling for galvanized steel plate wheel covers proposed in this invention. Figure 7 This is a schematic diagram of the pulling component structure of a flexible robotic welding fixture for a galvanized steel wheel cover proposed in this invention. Figure 8 This is a cross-sectional view of the magnetic end of a flexible robotic welding fixture for galvanized steel wheel covers proposed in this invention.

[0018] In the diagram: 1. Fixed base; 2. Welding robot; 3. Fixed component; 31. Sliding frame; 32. Rotating base; 33. Placement frame; 4. Sliding component; 41. Slider; 42. Pulley; 5. Clamping component; 51. Moving block; 52. Clamping block; 53. First drive shaft; 54. Drive motor; 6. Pulling component; 61. Rewinding wheel; 62. Pull rope; 63. Magnetic end; 631. Iron core rod; 632. Sliding ring; 633. Fixed ring; 634. Spiral tube; 7. Limiting component; 71. Connecting frame; 72. Extrusion strip; 73. Extrusion block; 8. Linkage component; 81. Second drive shaft; 82. First gear; 83. Second gear; 9. Limiting strip; 10. Guide port. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0021] Reference Figures 1-8 A flexible robotic welding fixture for galvanized steel wheel covers includes: a fixed base 1 and a welding robot 2. A fixing component 3 for fixing the wheel cover is provided above the fixed base 1. The fixing component 3 includes multiple sliding frames 31. Sliding members 4 are equidistantly slidably arranged on a plurality of sliding frames 31, and a clamping assembly 5 is arranged above the sliding member 4. The clamping assembly 5 is used to clamp the bottom of the wheel cover. The sliding member 4 has an internal mounting cavity, and two sliding openings communicating with the mounting cavity are symmetrically opened on both sides of the sliding member 4. A pull assembly 6 is provided inside the mounting cavity. The pulling assembly 6 includes a take-up wheel 61, a pull rope 62, and a magnetic end 63. The take-up wheel 61 is disposed inside the mounting cavity. The pull rope 62 is wound around the take-up wheel 61. The magnetic end 63 is fixedly installed at the end of the pull rope 62 away from the take-up wheel 61 and is used to magnetically fix the wheel cover. The installation cavity is provided with four limiting components 7, which are respectively located inside the four sliding openings and are used to fix the pull rope 62 inside the sliding openings.

[0022] In the embodiments of the above technical solution, since the middle curved surface of the wheel cover is suspended and the curved surface of the galvanized plate wheel cover is unsupported, the high temperature and stress of welding will cause it to deform rapidly, which cannot be suppressed by edge clamping alone. The magnetic end 63 magnetically pulls the concave and convex surfaces of the galvanized sheet, providing multi-point flexible auxiliary support to offset welding stress. This solves the problems of unsupported curved surfaces of galvanized sheet wheel covers, easy warping when heated during welding, wrinkling of welds, and excessive deformation of the sheet surface, and makes up for the defect that edge clamping alone cannot constrain the deformation of the middle part.

[0023] Addressing the characteristics of thin, rigid, and easily warped / deformed welded galvanized sheet wheel covers, this invention employs a composite positioning method combining edge-synchronous clamping and multi-point magnetic attraction and pulling on curved surfaces. Bottom clamping ensures overall positioning accuracy, while curved surface pulling counteracts welding stress and suppresses localized deformation, thus resolving the welding deformation problem through this dual action. This composite positioning method is specifically designed for the material characteristics of galvanized sheet, achieving both high-precision positioning and high stability against deformation, significantly improving welding pass rate and product accuracy.

[0024] The preferred technical solution in this embodiment is: Reference Figure 2 The fixing component 3 also includes two rotating seats 32 and a placement frame 33. The two rotating seats 32 are symmetrically fixedly connected to both sides of the fixing seat 1. The placement frame 33 is rotatably installed between the two rotating seats 32. The placement frame 33 is a rectangular frame. A plurality of sliding frames 31 are equidistantly and vertically fixedly connected inside the placement frame 33. Wheel covers are three-dimensional curved surface parts. Different weld seams require different welding angles. Without angle adjustment, welding gun interference and incomplete welding will occur. If the positioning point is not adjustable, it will be impossible to match wheel covers of different car models, and flexible production cannot be achieved. The placement frame 33 uses the rotating seat 32 as a fulcrum to adjust the circumferential angle, which can adjust the wheel cover to the optimal welding posture; the sliding frame 31 provides a linear movement guide for the sliding component 4, and the sliding component 4 can freely change the spacing and position along the sliding frame 31 to adapt to the bottom support point of wheel covers with different widths and different contours. It solves the problems of traditional tooling having non-adjustable welding angles, fixed positioning points, and being only compatible with a single specification of wheel cover. It also solves the defects of unstable wheel cover placement and unreasonable distribution of support points.

[0025] Reference Figure 3 The sliding member 4 includes a slider 41 and two pulleys 42. The slider 41 is slidably mounted on the sliding frame 31. The two pulleys 42 are rotatably mounted on the inner side of the slider 41 and slidably mounted inside the sliding frame 31. The mounting cavity is opened inside the slider 41. The positions of the bottom support points of wheel covers of different specifications vary greatly. Fixed support points cannot meet the needs of multiple vehicle models. Sliding and jamming will cause positioning deviations and directly affect the welding accuracy. When the slider 41 is pushed, the pulley 42 rolls along the inner wall of the sliding frame 31 to achieve low friction and high precision linear movement; after moving to the target position, it can be fixed by set screw or buckle to stabilize the slider 4 at the specified point and provide rigid support for clamping and pulling. It solves the problems of immovable positioning support points, narrow adaptation range, movement jamming, and low positioning accuracy, and avoids wheel cover placement deviation and uneven force due to fixed support points.

[0026] Reference Figures 4-5 The clamping assembly 5 includes two moving blocks 51, two clamping blocks 52, a first drive shaft 53, and a drive motor 54. The sliding member 4 has a groove in the middle. The first drive shaft 53 is rotatably installed inside the groove. The drive motor 54 is fixedly connected to the side of the sliding member 4, and its output end is fixedly connected to the first drive shaft 53. The two moving blocks 51 are respectively threaded to both ends of the first drive shaft 53. The two clamping blocks 52 are respectively symmetrically fixedly connected to the upper ends of the two moving blocks 51, and an inverted V-shaped clamping space is formed in the middle. Because galvanized steel sheets have low strength, clamping on one side or asynchronously will directly cause the sheet surface to twist. Only by using synchronous and uniform rigid clamping at the bottom can stable positioning be guaranteed throughout the welding process. The bottom of the galvanized sheet is clamped inside multiple inverted V-shaped clamping spaces to simply limit the galvanized sheet. Then, the drive motor 54 drives the first drive shaft 53 to rotate. Because the threads at both ends are reversed, the two moving blocks 51 move towards the center synchronously. The clamping block 52 clamps the bottom edge of the wheel cover evenly from both sides. When the motor reverses, the moving blocks 51 release outward synchronously to complete the unloading. It solves the problems of uneven clamping force at the bottom of the wheel cover, easy deformation under unilateral force, unreliable clamping, and displacement during welding. At the same time, it solves the defects of traditional fixtures, such as small range of applicable sizes and asynchronous clamping actions. It features bidirectional synchronous centering clamping, uniform and stable clamping force, and can adapt to wheel cover edges of different thicknesses and widths. The clamping and releasing actions are rapid and the positioning accuracy is high.

[0027] Reference Figure 7 and Figure 8 The magnetic end 63 includes an iron core rod 631, a sliding ring 632, a fixed ring 633, and a spiral tube 634. One end of the iron core rod 631 is fixedly connected to the end of the pull rope 62. The fixed ring 633 is fixedly connected to the end of the iron core rod 631 near the pull rope 62. The spiral tube 634 is sleeved on the iron core rod 631, with one end fixedly connected to the fixed ring 633 and the other end fixedly connected to the sliding ring 632. The sliding ring 632 is slidably sleeved on the iron core rod 631. Reference Figure 8 The sliding ring 632 is provided with a plurality of limiting strips 9, and the fixed ring 633 is provided with a plurality of guide openings 10 corresponding to the limiting strips 9 in a ring shape. The guide openings 10 are used to deflect the limiting strips 9 toward the axis of the iron core rod 631. The pull rope 62 is a flexible component. Under the combined effects of high temperature, stress impact and equipment vibration during wheel cover welding, it is prone to bending, elongation and swinging deformation. If it is not restrained, the magnetic end will deviate from the preset position, the pulling support force will drop or disappear instantly, and the curved surface of the wheel cover will warp and deform rapidly after losing restraint, directly causing weld offset, wrinkling and dimensional deviation. After the spiral tube 634 is energized, it generates an axial contraction force under the action of the electromagnetic field, which drives the sliding ring 632 to move along the iron core rod 631 towards the end closer to the pull rope 62 and the winding wheel 61. During the movement of the sliding ring 632, the limiting strip 9 on it is constrained by the guide port 10 on the fixed ring 633 and deflects towards the axis of the iron core rod 631 along the guide trajectory of the guide port 10, so that multiple limiting strips 9 hug the pull rope 62 from the circumference, forming a radial restraint on the pull rope 62. During the welding process, when the wheel cover is heated and generates stress that pulls the pull rope 62, the hugging structure of the limiting strip 9 can limit the pull rope 62 from radial shaking, axial elongation, and bending deformation, keeping the length and posture of the pull rope 62 stable and avoiding magnetic positioning failure due to deformation of the pull rope 62. After the power is turned off, the spiral tube 634 resets, the sliding ring 632 drives the limiting strip 9 to loosen, and the pull rope 62 can freely extend and retract to adjust its length.

[0028] This invention utilizes the combined structure of the pull assembly 6. When powered on, the electromagnetic force drives the sliding ring 632 to move towards the winding wheel 61. The guide port 10 causes the limiting strip 9 to automatically retract and tighten the pull rope 62, thereby fundamentally limiting the problems of elongation, bending, shaking, and plastic deformation of the pull rope 62 under welding stress and high-temperature vibration, and ensuring that the magnetic end position remains fixed throughout the process.

[0029] Traditional pull-rope 62 positioning relies solely on simple clamping or self-weight positioning, which cannot cope with the dynamic stress during welding and is prone to failure. In contrast, this invention adopts electromagnetic response real-time constraint, with the action synchronized with the welding energization sequence. It has a fast response speed and stable constraint force, achieving active suppression of pull-rope 62 deformation. It is specifically adapted to the high-precision welding requirements of thin galvanized sheet parts and solves the technical problems of pull-rope 62 positioning being prone to failure and unable to continuously resist deformation.

[0030] Reference Figure 5 and Figure 6 A linkage component 8 is provided in the middle of the mounting cavity, and the linkage component 8 is used to drive the limiting component 7 to move. The linkage component 8 includes a second drive shaft 81, a first gear 82, and a second gear 83. The second drive shaft 81 is rotatably disposed inside the mounting cavity and located below the first drive shaft 53. The first gear 82 is fixedly connected to the middle part of the first drive shaft 53, and the second gear 83 is fixedly connected to the middle part of the second drive shaft 81. The first gear 82 and the second gear 83 are meshed together. If the two mechanisms are driven independently, the timing of the actions will be disordered. If the pull rope 62 is not limited, the magnetic attraction will fail. If the clamp is not in place, the wheel cover will shift. This invention employs a single drive source, consisting of a first drive shaft 53 and a second drive shaft 81, via gear meshing to synchronously complete clamping, locking, and pull rope 62 limiting. This differs from the complex traditional tooling where clamping, limiting, and pulling are driven independently, achieving complete synchronization of actions from a mechanical principle perspective. When the drive motor 54 drives the first drive shaft 53 to rotate and clamp the wheel cover, the second drive shaft 81 synchronously drives the limiting component 7 to lock the pull rope 62, eliminating timing misalignment problems such as clamping in place but limiting not being activated, pull rope 62 loosening, magnetic attraction falling off, or limiting being locked but clamping not being tight, or workpiece displacement.

[0031] This design requires no additional controller or complex programming; it relies solely on a mechanical structure to ensure synchronized movements, simplifying the equipment structure, reducing the failure rate, lowering manufacturing costs, and significantly improving positioning reliability.

[0032] Reference Figure 6 The limiting component 7 includes two connecting frames 71, four extrusion strips 72 and four extrusion blocks 73. The two connecting frames 71 are respectively threaded to both ends of the second drive shaft 81. The two extrusion strips 72 are symmetrically fixedly connected to both ends of the connecting frames 71. The four extrusion blocks 73 are respectively fixedly connected to the upper side inside the four sliding ports and form an extrusion space with the extrusion strips 72. The welding process involves high-frequency vibrations, causing the pull rope 62 to gradually elongate without limit, the magnetic attraction point to shift, the auxiliary support to fail, and ultimately the wheel cover to deform. When the second drive shaft 81 rotates, the connecting brackets 71 at both ends move to both sides in sync, thereby driving the extrusion strip 72 to move closer to the extrusion block 73, firmly squeezing and locking the pull rope 62 in the sliding opening, preventing the pull rope 62 from extending, retracting and sliding. Reverse rotation will release the pull rope 62. It solves the problems of easy slippage of the pull rope 62, loose magnetic attraction, and vibration-induced detachment. At the same time, it has a large limiting and locking force. The first drive shaft 53 and the second drive shaft 81 can be driven synchronously by a single drive motor 54. The length of the pull rope 62 is precisely locked and is not affected by vibration. The magnetic positioning is stable and reliable throughout the entire process.

[0033] Reference Figure 5 The first drive shaft 53 has opposite threads on both sides. When it rotates, it drives the two moving blocks 51 to move closer or further away from each other synchronously. The second drive shaft 81 has opposite threads on both sides. When it rotates, it drives the two connecting brackets 71 to move closer or further away from each other synchronously. When the drive motor 54 drives the first drive shaft 53 to rotate, the reverse threads on both sides of the first drive shaft 53 drive the left and right moving blocks 51 to close synchronously in the middle, thereby clamping and positioning the bottom of the wheel cover. At the same time, the first gear 82 in the middle of the first drive shaft 53 drives the second gear 83 to rotate through meshing transmission, so that the second drive shaft 81 rotates synchronously in the opposite direction to the first drive shaft 53. The reverse threads on both sides of the second drive shaft 81 drive the left and right connecting frames 71 to separate synchronously outward, thereby allowing the extrusion strip 72 and the extrusion block 73 to cooperate to lock the pull rope 62.

[0034] The first drive shaft 53 and the second drive shaft 81 start at the same time, move for the same duration, arrive at the same time, and stop at the same time. The timing of the moving block 51 closing towards the center completely coincides with the timing of the connecting frame 71 separating to both sides, realizing the synchronous, reverse, and symmetrical linkage of the wheel cover clamping and the pull rope 62 limiting, ensuring accurate positioning, balanced force, and stable welding.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flexible robotic welding fixture for galvanized steel wheel covers, comprising: A fixed base and a welding robot, characterized in that a fixing assembly for fixing wheel covers is provided above the fixed base, the fixing assembly including multiple sliding frames; Sliding members are equidistantly arranged on multiple sliding frames, and a clamping assembly is provided above the sliding members for clamping the bottom of the wheel cover; The sliding member has an internal mounting cavity, and two sliding openings communicating with the mounting cavity are symmetrically opened on both sides of the sliding member. The mounting cavity is provided with multiple pulling components for fixing the wheel cover. The pulling assembly includes a take-up reel, a pull rope, and a magnetic end. The take-up reel is disposed inside the mounting cavity, the pull rope is wound around the take-up reel, and the magnetic end is fixedly installed at the end of the pull rope away from the take-up reel and is used to magnetically fix the wheel cover. The mounting cavity is equipped with four limiting components, which are respectively located inside the four sliding openings and are used to fix the pull rope inside the sliding openings.

2. The robotic welding flexible tooling for galvanized steel plate wheel covers according to claim 1, characterized in that, The fixing assembly also includes two rotating seats and a placement frame. The two rotating seats are symmetrically fixedly connected to both sides of the fixing seat, and the placement frame is rotatably installed between the two rotating seats. The placement frame is a rectangular frame, and a plurality of sliding frames are equidistantly and vertically fixedly connected inside the placement frame.

3. The robotic welding flexible fixture for galvanized steel plate wheel covers according to claim 1, characterized in that, The sliding component includes a slider and two pulleys. The slider is slidably mounted on a sliding frame, and the two pulleys are rotatably mounted inside the slider and slidably mounted inside the sliding frame. The mounting cavity is opened inside the slider.

4. The robotic welding flexible tooling for galvanized steel plate wheel covers according to claim 1, characterized in that, The clamping assembly includes two moving blocks, two clamping blocks, a first drive shaft, and a drive motor. The sliding member has a groove in the middle. The first drive shaft is rotatably installed inside the groove. The drive motor is fixedly connected to the side of the sliding member, and its output end is fixedly connected to the first drive shaft. The two moving blocks are respectively threaded to both ends of the first drive shaft. The two clamping blocks are respectively symmetrically fixedly connected to the upper ends of the two moving blocks, and an inverted V-shaped clamping space is formed in the middle.

5. The robotic welding flexible fixture for a galvanized steel plate wheel cover according to claim 1, characterized in that, The magnetic end includes an iron core rod, a sliding ring, a fixed ring, and a spiral tube. One end of the iron core rod is fixedly connected to the end of the pull rope. The fixed ring is fixedly connected to the end of the iron core rod near the pull rope. The spiral tube is sleeved on the iron core rod, with one end fixedly connected to the fixed ring and the other end fixedly connected to the sliding ring. The sliding ring is slidably sleeved on the iron core rod.

6. The robotic welding flexible tooling for galvanized steel plate wheel covers according to claim 5, characterized in that, The sliding ring is provided with multiple limiting strips, and the fixed ring is provided with multiple guide openings corresponding to the limiting strips in a ring shape. The guide openings are used to deflect the limiting strips toward the axis of the iron core rod.

7. The robotic welding flexible fixture for galvanized steel plate wheel covers according to claim 1, characterized in that, A linkage component is provided in the middle of the mounting cavity, which is used to drive the limiting component to move.

8. The robotic welding flexible tooling for galvanized steel plate wheel covers according to claim 7, characterized in that, The linkage assembly includes a second drive shaft, a first gear, and a second gear. The second drive shaft is rotatably disposed inside the mounting cavity and located below the first drive shaft. The first gear is fixedly connected to the middle of the first drive shaft, and the second gear is fixedly connected to the middle of the second drive shaft. The first gear and the second gear are meshed together.

9. The robotic welding flexible tooling for galvanized steel plate wheel covers according to claim 8, characterized in that, The limiting assembly includes two connecting frames, four extrusion strips, and four extrusion blocks. The two connecting frames are respectively threaded to both ends of the second drive shaft. The two extrusion strips are symmetrically fixed to both ends of the connecting frames. The four extrusion blocks are respectively fixed to the upper side inside the four sliding ports, and form an extrusion space with the extrusion strips.

10. The robotic welding flexible tooling for a galvanized steel plate wheel cover according to claim 9, characterized in that, The threads on both sides of the first drive shaft are in opposite directions. When rotating, they can drive the two moving blocks to move closer or further away from each other synchronously. The threads on both sides of the second drive shaft are in opposite directions. When rotating, they can drive the two connecting brackets to move closer or further away from each other synchronously.

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