A welding device for processing an outer cylinder of an automobile shock absorber

Abstract

The application discloses a welding device for processing an automobile shock absorber outer cylinder, which comprises a supporting table, three-axis linkage welding mechanical arms arranged on the supporting table, a supporting table, a controller and a placing assembly, another set of mounting plates and a cylinder one (9) are fixed on the mounting table, another set of placing seat bearings are connected to the mounting table, the cylinder one (9) is located on one side of the mounting plate, a clamping jaw cylinder is fixed to the output end of each group of the cylinder one, a fixed plate is fixed to the top of the cylinder one, a lifting plate is fixed to the output end of the cylinder one (9), two groups of sliding rods are slidably connected to the lifting plate, each group of the sliding rods is fixed to the fixed plate, a cover is fixed to the end, away from the cylinder one, of the lifting plate, a penetrating groove one is formed in the side, close to the cylinder one, of the cover, and three groups of air feelers are fixed to the bottom of the cover. The application can guarantee the welding precision.

Description

Technical Field

[0001] This invention relates to the field of automotive shock absorber outer cylinder welding technology, specifically a welding device for processing automotive shock absorber outer cylinders. Background Technology

[0002] The shock absorber is a key component of a vehicle's suspension system. Its main function is to dampen the vibration energy absorbed by the springs, improving ride comfort and handling stability. In the overall structure of the shock absorber, the outer cylinder, as the base component, needs to be welded and assembled with functional accessories such as the bracket, spring support, and oil line bracket to form a complete shock absorber assembly. For example, in a typical shock absorber structure, both ends of the outer cylinder need to be welded to the reservoir, and the bracket assembly also needs to be welded to the surface of the outer cylinder for connection to the vehicle body or other components. Therefore, the welding quality between the outer cylinder and the bracket directly affects the assembly accuracy, structural strength, and service life of the shock absorber.

[0003] In the prior art, the welding of the outer cylinder of the shock absorber and the bracket is usually done by using special welding fixtures for positioning and clamping. This method cannot monitor the coaxiality changes of the outer cylinder and the bracket in real time during the welding process. When there are slight dimensional deviations or assembly errors in the workpiece, it is difficult to guarantee the welding accuracy. This phenomenon has become a problem that urgently needs to be solved by those in the field. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for processing the outer cylinder of an automotive shock absorber, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a welding device for processing the outer cylinder of an automobile shock absorber, comprising a support platform, wherein a three-axis linkage welding robotic arm, a controller, a clamping assembly and a protective assembly are provided on the support platform; The clamping assembly includes a support frame, a motor, a cylinder, and a positioning frame. The support frame is fixed on a support platform, the motor is fixed inside the support frame, a support column is fixed on one side of the motor, a gear transmission group is provided on the top of the support frame, a chuck is fixed on the top of the gear transmission group, the output end of the motor is fixedly connected to the transmission gear group, and three sets of fans are fixed on the top of the chuck.

[0006] According to the above technical solution, four sets of support plates are fixed on the top of the positioning frame, and top columns are fixed on the top of the four sets of support plates. A pressure plate is fixed on the output end of the cylinder, and four sets of pressure columns are fixed on the bottom of the pressure plate. The bracket is fixed by the cooperation of the top columns and pressure columns, which facilitates the welding of the bracket to the outer cylinder.

[0007] According to the above technical solution, the protection component includes a linear drive component and a second cylinder. A lifting plate is fixed to the output end of the second cylinder. A slide bar is slidably connected to the lifting plate. The bottom of the slide bar is fixed to the pressing plate. A housing is fixed to one end of the lifting plate away from the second cylinder. Three wind sensors are fixed to the bottom of the housing. Three vision sensors are fixed inside the housing.

[0008] According to the above technical solution, the linear drive component is fixed to the top of the support platform. A sliding plate is slidably connected above the linear drive component. The first cylinder and the second cylinder are fixed above the sliding plate; The first cylinder is located on one side of the second cylinder.

[0009] According to the above technical solution, a placement frame is provided on one side of the support platform. A number of brackets are provided inside the placement frame; The three-axis linkage welding robot, the wind sensor, the linear drive component, and the vision sensor are electrically connected to the controller.

[0010] According to the above technical solution, the housing is located above the pressing plate. The pressing plate is in the shape of a C. It will not interfere with the operation of the three-axis linkage welding robot when the three-axis linkage welding robot is working. The center of the pressing plate and the housing are in the same coaxial position.

[0011] According to the above technical solution, the following welding method is included; Step S1: Feeding and positioning of the bracket; Step S2: Feeding and assembling of the outer cylinder; Step S3: Preparation for welding protection; Step S4: Precision detection before welding; Step S5: Welding operation and temperature control; Step S6: Quality inspection after welding; Step S7:下料 of the finished product.

[0012] According to the above technical solution, the step S4 includes the following specific operation steps: S4.1 Surface quality inspection of the outer cylinder; S4.2 Dynamic coaxiality detection; S4.3 Weld gap detection.

[0013] According to the above technical solution, the step S6 includes the following specific operation steps; S6.1 Weld sealability detection; S6.2 Welding strength detection; S6.3 Post-welding coaxiality detection.

[0014] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, through the provision of a fixed component and a housing, uses a controller to start a motor, driving the gripper chuck to rotate, causing the outer cylinder to rotate at a uniform speed within the housing. During rotation, a vision sensor continuously monitors the radial runout of the outer cylinder and makes a judgment based on the detection results: if the outer cylinder experiences radial vibration and has a smooth surface, it is determined that the outer cylinder is not coaxial with the center hole of the support, requiring the workpiece to be replaced; if the outer cylinder vibrates and has surface defects, it is determined that the vibration is caused by surface defects, and the operator grinds the outer cylinder and re-inspects it to maintain coaxiality before welding, thus improving subsequent welding accuracy.

[0015] By incorporating a fan, it is possible to prevent the outer cylinder and support from burning through or deforming due to the high temperatures during welding, which could affect coaxiality, since both are thin-walled components. Therefore, the fan is activated simultaneously during welding to force cooling of the weld area, reducing the impact of welding heat input and ensuring welding quality. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is the present invention. Figure 1 A magnified view of a portion of region A; Figure 4 This is the present invention. Figure 2 A magnified view of a portion of region B; Figure 5 This is a schematic diagram of the casing of the present invention; Figure 6 This is a schematic diagram of the gripper chuck of the present invention; In the diagram: 1. Support platform; 2. Three-axis linkage welding robotic arm; 3. Controller; 4. Placement frame; 5. Support frame; 6. Positioning frame; 7. Linear drive assembly; 8. Cylinder 2; 9. Cylinder 1; 10. Lifting plate; 11. Cover; 12. Motor; 13. Support column; 14. Support plate; 15. Top column; 16. Pressure plate; 17. Sliding plate; 18. Sliding rod; 19. Fan; 20. Pressure column; 21. Vision sensor; 22. Wind sensor; 23. Gripper chuck. Detailed Implementation

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

[0018] Please see Figure 1-6 The present invention provides a technical solution: a welding device for processing the outer cylinder of an automobile shock absorber, including a support platform 1. The support platform 1 is provided with a three-axis linkage welding robot arm 2, a controller 3, a clamping assembly and a protection assembly. The controller 3 is located on one side of the support platform 1. The three-axis linkage welding robot arm 2 is fixed to the top of the support platform 1. The three-axis linkage welding robot arm 2 is prior art and will not be described in detail here. A clamping robot arm (not shown in the figure) is provided on the outside of the support platform 1. The clamping robot arm clamps the outer cylinder of the bracket onto the clamping assembly, and the three-axis linkage welding robot arm 2 welds the outer cylinder and the bracket together.

[0019] A placement frame 4 is provided on one side of the support platform 1, and several supports are provided inside the placement frame 4.

[0020] The clamping assembly includes a support frame 5, a motor 12, a cylinder 9, and a positioning frame 6. The support frame 5 is fixed on the support platform 1, the motor 12 is fixed inside the support frame 5, a support column 13 is fixed on one side of the support frame 5 and the top of the support frame 5 is equipped with a gear transmission group, and a gripper chuck 23 is fixed on the top of the gear transmission group. The output end of the motor 12 is fixedly connected to the transmission gear group, and three sets of fans 19 are fixed on the top of the gripper chuck 23.

[0021] The top of the positioning frame 6 is fixed with four sets of support plates 14, the top of the four sets of support plates 14 is fixed with top columns 15, the output end of cylinder 9 is fixed with pressure plate 16, and the bottom of pressure plate 16 is fixed with four sets of pressure columns 20. The bracket can be fixed by the cooperation of top columns 15 and pressure columns 20, which facilitates the welding of the bracket to the outer cylinder.

[0022] The protection assembly includes a linear drive assembly 7 and a second cylinder 8. A lifting plate 10 is fixed to the output end of the second cylinder 8. A slide rod 18 is slidably connected to the lifting plate 10. The bottom of the slide rod 18 is fixed to the pressure plate 16. A cover 11 is fixed to the end of the lifting plate 10 away from the second cylinder 8. Three sets of wind sensors 22 are fixed to the bottom of the cover 11. Three sets of vision sensors 21 are fixed inside the cover 11.

[0023] The linear drive assembly 7 is fixed to the top of the support platform 1. A sliding plate 17 is slidably connected above the linear drive assembly 7. Cylinder 1 9 and Cylinder 2 8 are fixed above the sliding plate 17. The linear drive assembly 7 is driven by a motor, which is existing technology and will not be described in detail here.

[0024] Cylinder 1 9 is located on one side of cylinder 2 8.

[0025] The housing 11 is located above the pressing plate 16. The pressing plate 16 is in a U-shaped form and will not interfere with the operation of the three-axis linkage welding robot arm 2. The center of the pressing plate 16 and the housing 11 are in a concentric axis position.

[0026] The three-axis linkage welding robot arm 2, the wind sensor 22, the linear drive assembly 7 and the vision sensor 21 are electrically connected to the controller 3.

[0027] On one side of the support table 1, there is a placement rack (not shown in the figure). A number of collection racks are fixed on the placement rack for collecting the welded brackets and outer cylinders.

[0028] A welding device for processing an outer cylinder of an automotive shock absorber includes the following welding method: Step S1: Feeding and positioning of the bracket; The operator places the bracket to be welded on the top column 15. By controlling the linear drive assembly 7, the sliding plate 17 is moved close to the jaw chuck 23, so that the housing 11 is aligned with the center position of the jaw chuck 23. Subsequently, the cylinder 1 9 is controlled to contract, driving the pressing plate 16 to move downward, so that the pressing column 20 contacts the upper surface of the bracket. Through the two-point positioning cooperation of the pressing column 20 and the top column 15, the bracket is fixed and its center hole is coaxially aligned with the center hole of the housing 11.

[0029] Step S2: Feeding and assembling of the outer cylinder; Then, the outer cylinder is passed through the center hole of the bracket and inserted into the jaw chuck 23. The jaw chuck 23 is started to radially fix the outer cylinder, completing the pre-assembly of the outer cylinder and the bracket.

[0030] It should be added that the jaw chuck 23 is a prior art and will not be elaborated here.

[0031] Step S3: Preparation for welding protection; To avoid contamination by welding spatter, the cylinder 2 8 is controlled to contract, driving the lifting plate 10 to slide downward along the slide bar 18, and the housing 11 is lowered to the working position, covering the outer cylinder inside the housing 11. It should be noted that there is a welding operation gap reserved between the bottom of the housing 11 and the weld seam to ensure that the three-axis linkage welding robot arm 2 can smoothly perform welding.

[0032] Step S4: Precision detection before welding; To improve the welding precision, the coaxiality of the outer cylinder and the bracket is detected before formal welding: Step S4 includes the following specific operation steps: S4.1 Outer cylinder surface quality inspection: After the housing 11 descends to the proper position, the vision sensor 21 captures an image of the outer cylinder surface and transmits the image signal to the controller 3. The controller 3 analyzes the image to determine whether there are defects such as burrs or depressions on the outer cylinder surface and records the inspection results.

[0033] S4.2 Dynamic concentricity inspection: The controller 3 starts the motor 12 to drive the jaw chuck 23 to rotate, which带动 the outer cylinder to rotate uniformly within the housing 11. During the rotation, the vision sensor 21 continuously monitors the radial runout of the outer cylinder and makes a determination based on the inspection results: If the outer cylinder experiences radial jitter and the surface is smooth, it is determined that the outer cylinder is not coaxial with the center hole of the bracket, and the workpiece needs to be replaced; If the outer cylinder jitters and there are defects on the surface, it is determined that it is caused by surface defects, and the operator grinds the outer cylinder and reinspects it; When the jitter disappears, it is determined that the concentricity is qualified.

[0034] S4.3 Weld gap inspection: After the concentricity inspection is qualified, the controller 3 pauses the motor 12 to stop the rotation of the outer cylinder. At this time, the second cylinder 8 is controlled to extend to move the housing 11 upward, so that the housing 11 does not completely cover the outer cylinder. The outer cylinder is pushed by an external force, and at this time, the vision sensor 21 continuously monitors whether the outer cylinder jitters: If the outer cylinder jitters, it means that the clearance between the outer cylinder and the center hole of the bracket is too large, and it is determined as unqualified, and the welding is terminated; If the outer cylinder does not jitter, it means that the clearance meets the welding requirements, and the next welding process is entered.

[0035] Through the above steps, the concentricity is maintained before welding, which is convenient for improving the subsequent welding accuracy.

[0036] Step S5: Welding operation and temperature control; After the inspection is qualified, the three-axis linkage welding robot arm 2 is started to weld the circumferential weld between the bracket and the outer cylinder according to the welding path preset by the controller 3.

[0037] Since the pressing plate 16 is in the shape of a C, it will not hinder the operation of the three-axis linkage welding robot arm 2 during welding. However, for more uniform welding, when welding a certain distance, at this time, the outer cylinder and the bracket are already fixed, the first cylinder 9 is controlled to lift, so that the pressing column 20 is far away from the bracket, and then the jaw chuck 23 is controlled to rotate slowly, which is convenient for the three-axis linkage welding robot arm 2 to better weld the weld between the outer cylinder and the bracket.

[0038] Since both the outer cylinder and the bracket are thin-walled parts, high temperature during welding is likely to cause burn-through or thermal deformation, which will in turn affect the concentricity. Therefore, during the welding process, the fan 19 is started synchronously to forcibly cool the weld area, reduce the influence of the welding heat input, and ensure the welding quality.

[0039] Step S6: Post-weld quality inspection; Step S6 includes the following specific operational steps: S6.1 Weld Seam Sealing Inspection: After welding is completed, fan 19 is started to blow air into the weld area, and wind force signals are detected in real time by wind sensor 22 located on the opposite side of the weld. If the wind sensor 22 detects wind passing through the weld, it indicates that there is a through-hole defect in the weld, and a second welding is required. If the wind sensor 22 does not detect wind, it is preliminarily determined that the weld seal is good.

[0040] S6.2 Welding strength test: With fan 19 continuously operating, push the outer cylinder again. If the wind sensor 22 changes from not detecting wind force to detecting wind force under the thrust, it indicates that the weld has cracked under the action of external force, and is judged to be insufficient weld strength, requiring secondary welding; if no wind force is detected under the action of thrust, the weld firmness is judged to be qualified.

[0041] S6.3 Post-weld coaxiality inspection: During the welding strength inspection, the distance between the outer cylinder and the inner wall of the casing 11 is simultaneously monitored using the vision sensor 21. This distance value is compared with the initial distance recorded before welding. If the distance remains unchanged, it means that the outer cylinder and the support remain coaxial after welding. If the distance value changes, it indicates that the workpiece has undergone thermal deformation due to heat input during the welding process, affecting the coaxiality accuracy. In this case, the system needs to adjust the airflow parameters of the cooling fan 19 or extend the cooling time to provide a basis for process optimization in subsequent welding.

[0042] Step S7: Finished product unloading; After passing the inspection, the welded outer cylinder and support assembly are clamped and transferred to another set of placement components for easy removal by staff.

[0043] Through the above steps, the entire process of precision inspection and quality control of the shock absorber outer cylinder and bracket before, during, and after welding is achieved, which significantly improves welding quality and product consistency.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0045] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for processing the outer cylinder of an automotive shock absorber, comprising a support platform (1), characterized in that: The support table (1) is provided with a three-axis linkage welding robot arm (2), a controller (3), a clamping component and a protection component on the support table (1); The clamping component includes a support frame (5), a motor (12), a first cylinder (9) and a positioning frame (6). The support frame (5) is fixed on the support table (1). The motor (12) is fixed inside the support frame (5). A support column (13) is fixed on one side of the support frame (5) where the motor (12) is located. A gear transmission group is arranged on the top of the support frame (5). A jaw chuck (23) is fixed on the top of the gear transmission group. The output end of the motor (12) is fixedly connected to the transmission gear group. Three fans (19) are fixed on the top of the jaw chuck (23); The protection component includes a linear drive component (7) and a second cylinder (8). The output end of the second cylinder (8) is fixed with a lifting plate (10). A sliding rod (18) is slidably connected to the lifting plate (10). The bottom of the sliding rod (18) is fixed on a pressing plate (16). One end of the lifting plate (10) away from the second cylinder (8) is fixed with a housing (11). Three wind sensors (22) are fixed at the bottom of the housing (11). Three vision sensors (21) are fixed inside the housing (11); The linear drive component (7) is fixed on the top of the support table (1). A sliding plate (17) is slidably connected above the linear drive component (7). The first cylinder (9) and the second cylinder (8) are fixed above the sliding plate (17); The first cylinder (9) is located on one side of the second cylinder (8); Four support plates (14) are fixed on the top of the positioning frame (6). Four top columns (15) are fixed on the top of the four support plates (14). The output end of the first cylinder (9) is fixed with a pressing plate (16). Four pressing columns (20) are fixed at the bottom of the pressing plate (16). The bracket is fixed by the cooperation of the top column (15) and the pressing column (20), which is convenient for welding the bracket and the outer cylinder; The housing (11) is located above the pressing plate (16). The shape of the pressing plate (16) is a U-shaped. It will not interfere with the operation of the three-axis linkage welding robot arm (2) when the three-axis linkage welding robot arm (2) is working. The center of the pressing plate (16) and the housing (11) are in the same coaxial position.

2. The welding device for processing the outer cylinder of an automotive shock absorber according to claim 1, characterized in that: A placement frame (4) is arranged on one side of the support table (1). A number of brackets are arranged inside the placement frame (4); The three-axis linkage welding robot arm (2), the wind sensor (22), the linear drive component (7) and the vision sensor (21) are electrically connected to the controller (3).

3. The welding device for processing the outer cylinder of an automotive shock absorber according to claim 2, characterized in that: It includes the following welding methods; Step S1: Bracket feeding and positioning; Step S2: Outer cylinder feeding and assembly; Step S3: Welding protection preparation; Step S4: Precision detection before welding; Step S5: Welding operation and temperature control; Step S6: Quality inspection after welding; Step S7: Finished product blanking.

4. The welding device for processing the outer cylinder of an automotive shock absorber according to claim 3, characterized in that: The step S4 includes the following specific operation steps: S4.1 Outer cylinder surface quality inspection; S4.2 Coaxiality dynamic detection; S4.3 Weld gap detection.

5. The welding device for processing the outer cylinder of an automotive shock absorber according to claim 4, characterized in that: Step S6 includes the following specific operational steps; S6.1 Weld sealing inspection; S6.2 Welding strength test; S6.3 Post-weld coaxiality inspection.

Images