Argon arc welding machine for automobile accessory machining

Abstract

This invention provides an argon arc welding machine for automotive parts processing, relating to the field of automotive parts welding technology. It is used for welding automotive wheel hubs. A base frame is rotatably mounted with a support frame. The rotation path of the support frame includes spaced welding stations and balance testing stations. A support rod rotating along its own axis is mounted on the support frame. The support rod is equipped with a clamping device that passes through the center hole of the wheel hub to clamp and fix it. The support frame can rotate to drive the support rod to reciprocate between the welding station and the balance testing station, placing the wheel hub in either position. The support rod can drive the wheel hub to rotate coaxially via the clamping device. A welding mechanism is used to weld the wheel hub located at the welding station. A contact plate is mounted on the base frame and elastically abuts against the circumferential sidewall of the wheel hub located at the balance testing station. A displacement sensor is mounted on the contact plate to detect the displacement parameters of the contact plate during the wheel hub's rotation, determining whether the wheel hub's balance meets the standards.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts welding technology, specifically, it relates to an argon arc welding machine for automotive parts processing. Background Technology

[0002] Argon arc welding is mainly divided into TIG (Tungsten Inert Gas) welding and MIG (Metal Inert Gas) welding. It boasts advantages such as minimal welding deformation, high weld density, narrow heat-affected zone, and adaptability to welding various non-ferrous metals and thin plates, including stainless steel, aluminum alloys, and titanium alloys. Therefore, in automobile manufacturing, it is widely used for processing parts requiring high weld strength, sealing performance, and aesthetic precision. Taking automobile wheel hubs as an example, aluminum alloy wheel hubs, as core load-bearing components of the vehicle's running gear, require a balance between structural strength and dynamic balance precision during manufacturing. In traditional production and repair processes, argon arc welding is typically employed.

[0003] However, in actual production and maintenance, even small-area defect repair welding of aluminum alloy wheels using argon arc welding can alter the local mass distribution due to factors such as uneven filler wire and post-weld grinding. Simultaneously, the welding heat input can cause slight thermal deformation of the wheel, further disrupting its original mass balance. In traditional processes, these problems are only detected during the final dynamic balancing inspection, by which time the wheel has often already undergone subsequent painting and polishing processes. Once the balance is found to exceed the standard threshold, the paint layer must be peeled off, the surface protective structure ground away, and the wheel returned to the welding station for secondary welding or counterweight adjustment. This increases process turnaround time and rework costs. Furthermore, the equipment and human resources occupied by reworked wheels reduce the production space for qualified products, leading to a decrease in overall production capacity. Summary of the Invention

[0004] The purpose of this invention is to provide an argon arc welding machine for automotive parts processing, which solves the technical problem in related technologies where, when the balance detection delay causes the balance to exceed the standard threshold, the coating layer must be peeled off, the surface protective structure ground off, and then the machine must be returned to the welding station for secondary welding or counterweight adjustment, which increases the process turnaround time and rework costs.

[0005] At least one embodiment of the present invention provides an argon arc welding machine for processing automotive parts, used for welding automotive wheel hubs, including a base frame, a rotatable support frame, and welding stations and balance test stations arranged at intervals along the rotation path of the support frame; The support rod is rotatably mounted on the support frame. One end of the support rod is provided with a clamping device for fixing the wheel hub through the central hole. The support rod can drive the wheel hub to rotate coaxially through the clamping device. The support frame can rotate to drive the support rod to move back and forth between the welding station and the balance test station so that the wheel hub is placed in the welding station or the balance test station. The welding mechanism, mounted on the base frame and located at the welding station, is used for welding wheel hubs; The detection assembly is mounted on the base frame. The detection assembly includes a movable stage and a contact plate movably mounted on the movable stage. The contact plate is used to elastically press against the circumferential wall of the wheel hub. A displacement sensor is mounted on the contact plate to detect the displacement parameters of the wheel hub during its rotation at the balance test station.

[0006] According to an exemplary embodiment of this disclosure, a main bevel gear is rotatably mounted on the base frame, and a driven bevel gear that meshes with the main bevel gear is mounted on the other end of the support rod. The shaft of the main bevel gear is coaxial with the shaft of the support frame, so that when the support frame rotates, the driven bevel gear can maintain meshing with the main bevel gear and drive the hub to rotate around its own axis.

[0007] According to an exemplary embodiment of this disclosure, a contact plate is circumferentially movable on a base frame along a support frame, and is used to move synchronously with the hub around the axis of the support frame. The contact plate can elastically abut against the circumferential sidewall of the rotating hub.

[0008] According to an exemplary embodiment of this disclosure, the mobile stage is movably mounted on the base frame along the outer periphery of the support frame; The moving platform is equipped with a blower, the air outlet of which is configured to face the welding area of ​​the wheel hub, for blowing hot air onto the welding area of ​​the wheel hub for cleaning.

[0009] According to an exemplary embodiment of this disclosure, each support rod includes a first rod rotatably mounted on a support frame and a second rod coaxially mounted with and slidably connected to the first rod, wherein the second rod is located on the side of the first rod away from the axis of the support frame; The clamping device is located at the outer end of the second rod; An elastic element is provided between the first and second members, which is used to elastically push the second member away from the first member.

[0010] According to an exemplary embodiment of this disclosure, it further includes: The pusher is rotatably mounted on the moving platform. The pusher has push parts arranged circumferentially. The pusher can rotate to drive one of the push parts to push the hub to compress the elastic element and move the hub toward the side closer to the axis of the support frame. Alternatively, the jacking part can cancel the jacking hub, so that the second rod can drive the hub to move and reset under the elastic force of the elastic element; The reciprocating movement of the wheel hub can widen the relative orientation range between the welding area of ​​the wheel hub and the blown parts, allowing welding impurities located in the welding area of ​​the wheel hub to fall off.

[0011] According to an exemplary embodiment of the present disclosure, the contact plate has a contact surface for resiliently abutting against the lower part of the hub peripheral wall and a ramp continuously arranged with respect to the contact surface, the ramp extending downward at an angle away from the contact surface, the ramp being used to guide the hub to the contact surface.

[0012] According to an exemplary embodiment of this disclosure, the contact plate is mounted on the moving platform via an elastic block, and the end face of the contact plate away from the elastic block is the contact surface.

[0013] According to an exemplary embodiment of this disclosure, it further includes: the base frame is provided with an arc-shaped guide groove for the movement of the mobile stage; The bottom of the moving stage has a slider for sliding connection with the arc-shaped guide groove, the slider passing through the arc-shaped guide groove and extending below the arc-shaped guide groove; A drive rod is rotatably mounted on the lower part of the base frame. One end of the drive rod is rotatably connected to the base frame, and the other end is connected to the slider. The base frame is equipped with a rotation drive component, which drives the drive rod to rotate so that the moving table can slide along the arc-shaped guide groove via the slider.

[0014] According to an exemplary embodiment of this disclosure, there are two support rods, which are configured such that when one support rod drives the hub to be located at the welding station, the other support rod drives the other hub to move towards the balance test station.

[0015] This invention provides an argon arc welding machine for automotive parts processing. While the wheel hub is rotating, the welding mechanism can uniformly weld the weld seam, avoiding excessive local heat input caused by a stationary wheel hub. This reduces welding thermal deformation and uneven wire filling, minimizing the damage to the wheel hub's mass distribution caused by welding. After welding, the support frame rotates again, moving the welded wheel hub from the welding workstation to the balance test station. The support rod maintains coaxial rotation, continuing to rotate the wheel hub. Because the contact plate elastically abuts against the circumferential sidewall of the wheel hub, if the wheel hub experiences uneven mass distribution or slight thermal deformation due to welding, radial runout will occur on the circumferential sidewall during rotation, causing displacement of the contact plate. A displacement sensor captures the displacement parameters of the contact plate in real time. By analyzing the fluctuation amplitude of the displacement parameters, it can be determined whether the wheel hub's balance meets the standards. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the structure of an argon arc welding machine for processing automotive parts provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A structural diagram of the remaining equipment, excluding the welding mechanism; Figure 3 This is an embodiment of the present invention. Figure 1 Structural diagram of the moving platform, contact plate, spray nozzle, pusher, and hub; Figure 4 This is an embodiment of the present invention. Figure 1 A structural schematic diagram of the moving platform, drive rod, and rotary drive components; Figure 5 This is an embodiment of the present invention. Figure 4 A magnified view of part A in the diagram; Figure 6 This is an embodiment of the present invention. Figure 1 Structural diagram of the jacking component and hub; Figure 7 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the central support rod, the bevel gear, the clamping device, and the hub; Figure 8 This is an embodiment of the present invention. Figure 6 Exploded structural diagram excluding the wheel hub; Figure 9 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the load-bearing frame.

[0018] In the diagram: 100, base frame; 110, welding station; 120, balance testing station; 130, welding mechanism; 140, drive gear; 150, arc-shaped guide groove; 200, bearing frame; 300, support rotating rod; 310, main bevel gear; 320, driven bevel gear; 330, first rod; 331, connecting protrusion; 340, second rod; 341, connecting groove; 350, elastic element; 400, clamping. Device; 500, hub; 510, center hole; 600, detection component; 601, moving stage; 602, slider; 610, contact plate; 611, ramp; 612, contact surface; 620, displacement sensor; 630, blowing component; 640, pushing component; 641, pushing part; 650, transmission gear; 660, elastic block; 670, guide column; 700, drive rod; 800, rotation drive component. Detailed Implementation

[0019] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0020] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0021] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0024] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0025] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure.

[0026] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0027] like Figures 1-2 As shown, this illustrates an argon arc welding machine for automotive parts processing according to an embodiment of the present invention, mainly used to solve the problem caused by the delay in balance detection. In this example, the foundation of the argon arc welding machine is a base frame 100, on which a support frame 200 is rotatably mounted. Figure 9 As shown, the support frame 200 has a disc-shaped base that can rotate along its own axis. In the example, the rotation is achieved by a circular sliding rail on the base frame 100, with a slider corresponding to the rail at the bottom of the support frame 200. The rotation path of the support frame 200 includes a welding station 110 and a balance testing station 120, arranged at intervals. The driving method for the support frame 200 is as follows... Figure 1 As shown, teeth are provided on the peripheral wall of the circular base of the support frame 200, and driven by a drive gear 140. The power motor of the drive gear 140 can be located inside the base frame 100.

[0028] A support rod 300, which can rotate around its own axis, is mounted on the support frame 200. One end of the support rod 300 is equipped with a clamping device 400, such as... Figure 7 and Figure 8 As shown, the clamping device 400 can be a three-jaw clamp that can pass through the center hole 510 of the hub 500 and achieve coaxial fixation of the hub 500. The support frame 200 can rotate along its own axis, driving the support rotating rod 300 and the clamped hub 500 to switch back and forth between the welding station 110 and the balance testing station 120. At the same time, relying on the rotation of the support rotating rod 300, the hub 500 can be driven to rotate along its own axis.

[0029] The base frame 100 is equipped with an argon arc welding mechanism 130 at the welding station 110, such as... Figure 1 As shown, preferably, the welding mechanism 130 is capable of performing argon arc welding on the wheel hub 500, which is located at the welding station 110 and rotates coaxially, to complete the defect repair welding or welding processing of the wheel hub 500. Preferably, as shown... Figure 1 As shown, the base frame 100 is provided with a track and a rotating mechanism for the horizontal movement of the welding mechanism 130, so that the welding mechanism 130 can move horizontally to approach or move away from the hub 500 to perform welding, cancel welding or adjust the welding position and other operations.

[0030] A detection component 600 is also provided on the base frame 100. The detection component 600 includes a movable stage 601 and a contact plate 610 movably disposed on the movable stage 601. The contact plate 610 is used to elastically press against the peripheral wall of the wheel hub 500. Therefore, the contact plate 610 and the movable stage 601 can be connected by an elastic element. Preferably, an elastic block 660 can be used, and the elastic block 660 can be made of rubber. Utilizing the elastic contact characteristics of the contact plate 610, the radial position change during the rotation of the wheel hub 500 is sensed. Then, the displacement parameters of the contact plate 610 are collected and recorded in real time by the displacement sensor 620 to determine the balance state of the wheel hub 500. Preferably, to ensure that the contact plate 610 can remain horizontal when pushed by the wheel hub 500 and improve detection accuracy, such as... Figure 5 As shown, a blind groove can be opened below the contact plate 610, and a guide post 670 can be installed. The guide post 670 can slide in the blind groove to limit and guide the contact plate 610.

[0031] Specifically, during equipment operation, the aluminum alloy wheel hub 500 to be welded is first fixed by the clamping device 400. The clamping device 400 passes through the center hole 510 of the wheel hub 500 to achieve coaxial positioning, ensuring that the rotation axis of the wheel hub 500 coincides with that of the support rotating rod 300. Then, the support frame 200 starts to rotate, driving the support rotating rod 300 and the wheel hub 500 to the welding station 110. At this time, the support rotating rod 300 rotates around its own axis under the drive of the corresponding drive device, driving the wheel hub 500 to rotate synchronously and coaxially. The welding mechanism 130 starts and performs argon arc welding on the rotating wheel hub 500. While the hub 500 is rotating, the welding mechanism 130 can uniformly weld the weld seam, avoiding excessive local heat input caused by the hub 500 being stationary, reducing welding thermal deformation and uneven filler wire. After welding is completed, the support frame 200 rotates again, moving the welded hub 500 from the welding station 110 to the balance test station 120. The support rod 300 maintains coaxial rotation, driving the hub 500 to continue rotating. Because the contact plate 610 elastically abuts against the circumferential sidewall of the hub 500, if the hub 500 experiences uneven mass distribution or slight thermal deformation due to welding, its circumferential sidewall will exhibit radial runout during rotation, thereby pushing the contact plate 610 to displace. The displacement sensor 620 captures the displacement parameters of the contact plate 610 in real time. By analyzing the fluctuation amplitude of the displacement parameters, it can be determined whether the balance of the hub 500 meets the standard.

[0032] When conducting the balance test, it should be noted that the initial rotation speed during the test should not be too fast. It should be gradually increased from a low speed to the target speed to avoid the aggravation of the shaking of the hub 500 caused by high-speed startup or the loosening of the clamping due to excessive inertial force. At the same time, it can reduce the impact on the displacement sensor 620 and the contact plate 610, which helps to improve the detection accuracy. If the fluctuation amplitude of the displacement data collected by the displacement sensor 620 is within the preset allowable range under all rotational speed conditions, and the hub 500 rotates smoothly without obvious shaking, it is determined that the immediate post-welding balance test of the hub 500 is qualified, and the hub 500 can be transferred to the blanking station or subsequent processing procedures. If, under a certain rotational speed condition, the fluctuation amplitude of the displacement data exceeds the allowable range, or there is obvious shaking or abnormal noise during the rotation of the hub 500, it is determined that the test is unqualified and the machine needs to be stopped for inspection. After the test is unqualified, first check whether the clamping device 400 is loose and whether the position of the contact plate 610 is offset. After excluding factors such as clamping and detection positions, it can be initially determined that it is due to uneven quality distribution or welding deformation caused by welding. Transfer the hub 500 back to the welding station 110, perform secondary repair welding and grinding adjustment, and then conduct the balance test again until the test is qualified.

[0033] In the traditional process, after the hub 500 is welded, it needs to be transferred to a dedicated detection device for balance detection, and there is time loss in equipment switching and re-clamping during this process. In this solution, the welding station 110 and the balance test station 120 are integrated on the same device, and the station switching can be completed by the rotation of the carrier 200, without additional transfer and secondary clamping, greatly reducing the process turnover time and improving the processing efficiency of a single hub 500. And immediately after welding, a preliminary balance detection is carried out, which can discover the balance problem of the hub 500 in the first time. If it is detected that the balance degree exceeds the standard, secondary repair welding or counterweight adjustment can be directly carried out on the device without waiting for subsequent processes such as painting and polishing. The clamping device 400 is coaxially fixed through the central hole 510 of the hub 500, eliminating the detection error caused by different clamping references, enabling the parameters collected by the displacement sensor 620 to truly reflect the balance state of the hub 500, improving the accuracy of the preliminary detection, and providing a reliable pre-screening basis for subsequent terminal detection.

[0034] Moreover, the support rotating rod 300 is horizontally arranged, and the axis of the clamped hub 500 is coaxial with the support rotating rod 300, so that the whole hub 500 is perpendicular to the ground, which can simulate the actual rotation state. When it is not vertically arranged, the rotation axis of the hub 500 is inconsistent with the rotation axis after actual installation, the detection condition deviates from the actual use condition, and the detected radial runout data cannot truly reflect the actual balance state of the hub 500. At the same time, gravity will generate an additional eccentric moment. Even if the mass distribution of the hub 500 itself is uniform, false radial runout will occur due to the offset of the center of gravity, resulting in the distortion of the data collected by the displacement sensor 620 and the situation of misjudging as qualified or unqualified.

[0035] In a further example, a main bevel gear 310 is rotatably mounted on the base frame 100. The main bevel gear 310 is driven to rotate by a drive motor mounted on the base frame 100. A driven bevel gear 320 is fixedly mounted at one end of the support rod 300. The main bevel gear 310 and the driven bevel gear 320 mesh with each other. The shaft of the main bevel gear 310 is coaxial with the shaft of the support frame 200, ensuring that the driven bevel gear 320 does not disengage from the main bevel gear 310 when the support frame 200 rotates around its own shaft. Its function is to use the meshing transmission characteristics of bevel gears to transmit the rotational power of the support frame 200 to the support rod 300, driving the support rod 300 to drive the hub 500 to rotate synchronously, while ensuring the continuity of transmission during workstation switching.

[0036] In a further example, the contact plate 610 is circumferentially movable on the base frame 100 along the support frame 200, and can move synchronously with the hub 500 around the axis of the support frame 200. That is, the movement trajectory of the contact plate 610 matches the rotation trajectory of the support frame 200, and can adjust its own position according to the revolution position of the hub 500, always elastically abutting against the side wall of the rotating hub 500, and synchronously detecting the process of the hub 500 moving from the welding station 110 to the balance test station 120.

[0037] Specifically, after welding, the support frame 200 continues to rotate, driving the hub 500 to move towards the balance test station 120. As an example, during this process, the main bevel gear 310 remains stationary, while the driven bevel gear 320, meshing with the main bevel gear 310, revolves with the support frame 200. Under meshing, the driven bevel gear 320 synchronously rotates, and the rotational power is transmitted to the clamping device 400 through the support rod 300, thereby driving the hub 500 to rotate synchronously. At the same time, the contact plate 610 moves along the outer periphery of the support frame 200, adapting to the revolution position of the hub 500 in real time, and continuously contacts the circumferential sidewall of the hub 500 in an elastic abutment manner. When the hub 500 has uneven mass distribution or thermal deformation due to welding, radial runout will occur during rotation, thereby pushing the contact plate 610 to produce displacement. The displacement sensor 620 can collect this displacement parameter in real time to determine the balance state of the hub 500. In addition, if it is necessary to adjust the rotation speed of the hub 500, the rotation speed of the main bevel gear 310 can be changed. With the help of the fixed transmission ratio of the bevel gear meshing, the rotation speed of the secondary bevel gear 320 and the hub 500 can be adjusted to meet the welding and inspection requirements of hubs 500 of different specifications.

[0038] Preliminary follow-up inspection of the welded wheel hub 500 is necessary because the heat deformation and uneven filler wire caused by the welding process result in mass distribution deviations. The wheel hub 500 is in its most primitive state while hot, and inspection at this stage directly reflects the actual effect of the welding operation. If inspection were delayed until cooling, the slow release of thermal stress might alter the deformation state of the wheel hub 500, making it difficult to trace the core cause of the deviation. Simultaneous hot inspection allows for earlier detection of balance issues caused by welding. If a balance deviation is detected while hot, the wheel hub 500 can be directly transferred back to welding station 110 for adjustment. At this point, the wheel hub 500 has not entered any subsequent processing stage, thus avoiding additional process costs. Furthermore, while the wheel hub 500 is not completely cooled while hot, this reduces the heat input during secondary welding and grinding, minimizing damage to the aluminum alloy wheel hub 500 base material from multiple thermal cycles. It also improves the fusion of the weld filler and the base material, ensuring the quality of the reworked wheel hub 500.

[0039] When conducting the above tests, it is important to note that the wheel hub 500 should rotate at a low, uniform speed. Because the aluminum alloy wheel hub 500 has relatively high plasticity in its hot state, excessively fast rotation will generate significant centrifugal force, potentially exacerbating post-weld thermal deformation and leading to meaningless deviations in the test data. Rapid acceleration and deceleration of the wheel hub 500 are strictly prohibited. If adjustments to the rotation speed are necessary, they should be made gradually and incrementally. The wheel hub 500 undergoes thermal expansion deformation in its hot state. The radial runout data obtained from the tests must be reasonably corrected based on the thermal expansion coefficient of this specification of aluminum alloy wheel hub 500 to avoid misinterpreting dimensional changes caused by thermal expansion as balance deviations caused by welding. Data collection should be conducted within a relatively stable continuous range after the wheel hub 500 rotates, collecting multiple sets of data as the basis for judgment. This avoids random deviations in single data points due to the dynamic changes in the deformation of the wheel hub 500 in its hot state. If sudden, large fluctuations occur in the data, data collection should be paused to investigate whether it is caused by increased thermal deformation of the wheel hub 500 or loose clamping.

[0040] In further examples, such as Figures 3-6As shown, the movable platform 601 is mounted on the base frame 100 along the outer periphery of the support frame 200, and its movement trajectory matches the rotation path of the support frame 200. The contact plate 610 is mounted on the movable platform 601 via an elastic block 660. The movable platform 601 can move and drive the contact plate 610 to move synchronously, ensuring that the contact plate 610 always maintains effective contact with the circumferential sidewall of the hub 500, which is in a revolution state. The movable platform 601 is also equipped with a blowing component 630, which is a gas injection component. Its air outlet is directed towards the welding area of ​​the hub 500, and its function is to... Hot air is blown into the welding area of ​​the wheel hub 500. The weld slag and oxide scale in the hot state after welding have not been completely cooled and hardened, and their bonding force with the wheel hub 500 is weak. At this time, blowing hot air can remove impurities from the welding area, reduce impurity residue, and improve the authenticity and reference of the balance test data. The impurities remaining after welding will adhere to the surface of the wheel hub 500 and change the local mass distribution. If the balance test is performed directly, the displacement parameters collected by the displacement sensor 620 will include the influence of impurities, resulting in distorted test results that cannot truly reflect the welding deformation and mass distribution of the wheel hub 500.

[0041] Hot air is chosen because if the hot aluminum alloy wheel hub 500 is suddenly cooled by a low-temperature airflow, the large local temperature difference will generate significant thermal stress, which can easily lead to micro-cracks in the welding area and deformation of the wheel hub 500 base material. As a preferred option, the hot air with a high initial blowing temperature can be appropriately reduced as the moving table 601 moves, achieving flexible cooling of the wheel hub 500, reducing deformation or cracking of the wheel hub 500 caused by thermal stress concentration, and also avoiding secondary oxidation of the wheel hub 500 surface caused by sudden cooling, thus protecting the performance of the wheel hub 500 base material.

[0042] When performing the above operations, the initial temperature and cooling gradient of the hot air must be set in advance based on the welding temperature of the hub 500 and the thermal characteristics of the aluminum alloy base material. The initial hot air temperature must be ensured to be lower than the welding temperature to avoid secondary thermal deformation of the welding area due to excessive temperature. The cooling process as the moving table 601 moves must be gradual, with a reasonable temperature drop range set to avoid local temperature drops that could generate thermal stress. The cooling rate can be matched to the revolution speed of the support frame 200 to ensure that the hub 500 achieves appropriate and uniform cooling when it reaches the balance test station 120. The pressure of the blowing airflow must be adjusted to a moderate level. Excessive pressure may impact the hot hub 500, causing plastic deformation of the welding area or base material of the hub 500. Insufficient pressure will not effectively remove the softened impurities, failing to achieve the desired cleaning effect. Dry compressed air or inert gas should be preferred as the hot air medium for blowing. Avoid the medium containing water vapor or oil to prevent secondary oxidation of the hot hub 500 after contact with water vapor, or oil adhering to the welding area and the side wall of the hub 500, forming new impurities that affect the test. At the same time, the cleanliness of the blowing pipeline should be checked regularly to prevent impurities in the pipeline from being blown out with the hot air and adhering to the surface of the hub 500.

[0043] In a further example, the support rod 300 is composed of a first rod 330 and a second rod 340. The first rod 330 is assembled on the support frame 200, and the second rod 340 has an axial sliding fit with the first rod 330, such as... Figure 7 and Figure 8 As shown, the second rod 340 is provided with a connecting groove 341, and the first rod 330 is provided with a corresponding connecting protrusion 331. The connecting protrusion 331 and the connecting groove 341 achieve a sliding connection along the axial direction and a rigid connection along the radial direction. The clamping device 400 is fixed at the end of the second rod 340 away from the first rod 330. The elastic element 350 is disposed between the first rod 330 and the second rod 340. The elastic element 350 is preferably a spring. The second rod 340 can slide freely along the axial direction of the first rod 330. When the elastic element 350 is in its natural state, it will elastically push the second rod 340, so that the second rod 340 remains in its initial position away from the first rod 330.

[0044] The jacking member 640 is rotatably mounted on the moving platform 601 via a set of meshing transmission gears 650, and has multiple jacking parts 641 distributed circumferentially, such as... Figure 6 As shown, the pushing part 641 is semi-circular. The pushing part 641 can alternately act on the end face of the hub 500 away from the second rod 340 as the pushing member 640 rotates. By rotating the pushing member 640, multiple pushing parts 641 can alternately push the hub 500, compressing the elastic element and causing the hub 500 to move closer to the axis of the support frame 200, or the pushing part 641 can cancel pushing the hub 500, so that the second rod 340, under the elastic force of the elastic member 350, drives the hub 500 to move and reset. Figure 6 This demonstrates the state where the pusher section 641 has removed the pusher hub 500.

[0045] The purpose is that after welding, residual welding slag, oxide scale and other impurities will adhere to the surface of the welding area. Simply relying on the airflow impact of the hot air jet has limited cleaning effect. However, during the axial reciprocating movement of the wheel hub 500, a continuous inertial force is generated. This inertial force acts on the adhered impurities, loosening the connection structure between the impurities and the wheel hub 500 base material. Combined with the softening effect of the hot air jet from the blower 630 and the airflow impact, the impurities will be more easily detached from the welding area. Compared with the single blow cleaning method, the cleaning effect is more thorough, avoiding the impact of impurity residue on the accuracy of subsequent balance testing.

[0046] Furthermore, if the hub 500 remains stationary in its axial position, the hot air from the blower 630 can only cover a fixed area of ​​the welding zone. This results in inconsistent cleaning effectiveness for impurities at different axial positions within the welding zone, easily creating cleaning dead zones. However, the reciprocating axial movement of the hub 500 causes different axial areas of the welding zone to alternately pass through the outlet of the blower 630, ensuring that the blown hot air covers the entire axial range of the welding zone. Simultaneously, the rotation of the hub 500 also fully covers the circumferential area of ​​the welding zone, achieving thorough cleaning without dead zones and further guaranteeing the cleaning effect.

[0047] It should be noted that during the above process, the contact plate 610 will always maintain elastic contact with the side wall of the hub 500, and the axial displacement of the hub 500 will not affect the balance detection results. This is because the detection direction of the displacement sensor 620 is consistent with the elastic contact direction of the contact plate 610, which is the radial direction of the hub 500. The displacement sensor 620 is only sensitive to the radial position changes generated by the side wall of the hub 500, and can capture and record the displacement data in this direction. The axial movement of the hub 500 will not trigger the signal change of the displacement sensor 620, and will not generate invalid detection data interference. Furthermore, the axial reciprocating movement of the hub 500 only changes its axial position, and will not change the mass distribution of the hub 500 itself, nor will it cause new radial runout. The core basis for balance testing is the radial runout of the hub 500 during rotation. This runout is caused by factors such as uneven mass distribution due to welding and thermal deformation, which are inherent structural characteristics of the hub 500. Axial movement, on the other hand, is an externally driven linear motion that only changes position and does not alter the mass distribution or radial shape of the hub 500. Therefore, it does not cause additional radial deviation in the hub 500, and the test data can still accurately reflect the actual balance state of the hub 500. Furthermore, the axial movement of the hub 500 remains coaxial, and the movement is smooth and impact-free. It does not generate additional radial force due to axial movement, nor does it cause radial loosening or offset between the clamping device 400 and the hub 500. The rotation state of the hub 500 remains stable, and the detection environment for its radial runout is not changed by axial movement. The radial displacement data collected by the displacement sensor 620 will not fluctuate or be distorted due to external interference, ensuring the validity of the test results.

[0048] In a further example, the contact plate 610 has a contact surface 612 for elastically abutting against the lower part of the hub 500 peripheral wall and a ramp 611 continuously arranged with the contact surface 612. The inclined structure of the ramp 611 can play a guiding role, guiding the hub 500 peripheral wall to slide naturally towards the contact surface 612 without manual adjustment, ensuring that the contact surface 612 quickly fits against the lower part of the hub 500 peripheral wall.

[0049] The base frame 100 includes a platform for mounting the aforementioned components and an installation space located below the platform. The bottom of the moving stage 601 has a slider 602 for slidingly connecting with the arc-shaped guide groove 150. The slider 602 passes through the arc-shaped guide groove 150 and extends below the arc-shaped guide groove 150. Figure 4 As shown, a drive rod 700 is rotatably mounted on the lower part of the base frame 100. One end of the drive rod 700 is rotatably connected to the base frame 100, and the other end is connected to the slider 602. The rotation axis of the drive rod 700 is coaxially arranged with the rotation axis of the support frame 200. A rotation drive component 800 is installed in the installation space at the lower part of the base frame 100. The rotation drive component 800 is used to drive the drive rod 700 to rotate, so as to drive the moving table 601 to slide along the arc-shaped guide groove 150 through the slider 602.

[0050] In a further example, there are two support rods 300. One drives the hub 500 to move towards the balance test station 120 when it is located at the welding station 110. The two support rods 300 share a common transmission system of main bevel gear 310 and driven bevel gear 320. Without the need for additional drive devices, the synchronous rotation and station switching of the two support rods 300 can be achieved, which simplifies the equipment structure and reduces the manufacturing cost and energy consumption of the equipment. At the same time, the alternating operation of the two support rods 300 keeps the core components such as the support frame 200, transmission system, and testing component 600 in a state of high efficiency, avoids station idleness or component waste, improves equipment resource utilization, and reduces the processing cost of a single hub 500.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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. An argon arc welding machine for processing automotive parts, used for welding automotive wheel hubs (500), characterized in that, include: The base frame (100) is rotatably equipped with a support frame (200), and the rotation path of the support frame (200) includes welding stations (110) and balance test stations (120) arranged at intervals. A support rod (300) is rotatably mounted on the support frame (200). One end of the support rod (300) is provided with a clamping device (400) for passing through the center hole (510) of the hub (500) to fix the hub (500). The support rod (300) can drive the hub (500) to rotate coaxially through the clamping device (400). The support frame (200) can rotate to drive the support rod (300) to reciprocate between the welding station (110) and the balance test station (120) so that the hub (500) is placed in the welding station (110) or the balance test station (120). A welding mechanism (130) is provided on the base frame (100) and located at the welding station (110) for welding the wheel hub (500); A detection component (600) is disposed on the base frame (100). The detection component (600) includes a movable stage (601) and a contact plate (610) movably disposed on the movable stage (601). The contact plate (610) is used to elastically press against the peripheral wall of the wheel hub (500). A displacement sensor (620) is disposed on the contact plate (610). The displacement sensor (620) is used to detect the displacement parameters of the wheel hub (500) during rotation at the balance test station (120).

2. The argon arc welding machine for processing automotive parts according to claim 1, characterized in that, A main bevel gear (310) is rotatably mounted on the base frame (100), and a driven bevel gear (320) meshing with the main bevel gear (310) is provided at the other end of the support rod (300). The rotation axis of the main bevel gear (310) is coaxial with the rotation axis of the support frame (200), so that when the support frame (200) rotates, the driven bevel gear (320) can maintain meshing with the main bevel gear (310) and drive the hub (500) to rotate around its own axis.

3. The argon arc welding machine for processing automotive parts according to claim 2, characterized in that, The contact plate (610) is circumferentially movable on the base frame (100) along the support frame (200) and is used to move synchronously with the hub (500) around the axis of the support frame (200). The contact plate (610) can elastically abut against the circumferential sidewall of the hub (500) in the rotating state.

4. The argon arc welding machine for processing automotive parts according to claim 3, characterized in that, The mobile platform (601) is movably mounted on the base frame (100) along the outer periphery of the support frame (200); The movable platform (601) is provided with a blower (630), the air outlet of which is configured to face the welding area of ​​the wheel hub (500) for blowing hot air onto the welding area of ​​the wheel hub (500) for cleaning.

5. The argon arc welding machine for processing automotive parts according to claim 4, characterized in that, Each of the support rods (300) includes a first rod (330) rotatably mounted on the support frame (200) and a second rod (340) coaxially mounted with and slidably connected to the first rod (330), wherein the second rod (340) is located on the side of the first rod (330) away from the axis of the support frame (200); The clamping device (400) is disposed at the outer end of the second rod (340); An elastic element (350) is provided between the first rod (330) and the second rod (340), and the elastic element (350) is used to elastically push the second rod (340) away from the first rod (330).

6. The argon arc welding machine for processing automotive parts according to claim 5, characterized in that, Also includes: A pusher (640) is rotatably mounted on the moving platform (601). The pusher (640) has push portions (641) arranged circumferentially. The pusher (640) can rotate to drive one of the push portions (641) to push the hub (500) to compress the elastic member (350) and move the hub (500) toward the side closer to the axis of the support frame (200). Alternatively, the pushing part (641) may cancel pushing the hub (500), so that the second rod (340) may drive the hub (500) to move and reset under the elastic force of the elastic member (350); The reciprocating movement of the hub (500) can widen the relative orientation range between the welding area of ​​the hub (500) and the blower (630), so that welding impurities located in the welding area of ​​the hub (500) can fall off.

7. The argon arc welding machine for processing automotive parts according to claim 1, characterized in that, The contact plate (610) has a contact surface (612) for elastically abutting against the lower part of the peripheral wall of the hub (500) and a ramp (611) continuously arranged with respect to the contact surface (612). The ramp (611) extends downward at an angle away from the contact surface (612) and is used to guide the hub (500) onto the contact surface (612).

8. The argon arc welding machine for processing automotive parts according to claim 7, characterized in that, The contact plate (610) is mounted on the moving stage (601) via an elastic block (660), and the end face of the contact plate (610) away from the elastic block (660) is the contact surface (612).

9. An argon arc welding machine for processing automotive parts according to claim 6, characterized in that, The base frame (100) is provided with an arc-shaped guide groove (150) for the movement of the moving platform (601); The bottom of the moving stage (601) has a slider (602) for sliding connection with the arc-shaped guide groove (150), the slider (602) passing through the arc-shaped guide groove (150) and extending below the arc-shaped guide groove (150); A drive rod (700) is rotatably mounted on the lower part of the base frame (100). One end of the drive rod (700) is rotatably connected to the base frame (100), and the other end is connected to the slider (602). The base frame (100) is equipped with a rotation drive (800), which drives the drive rod (700) to rotate so that the movable stage (601) can slide along the arc-shaped guide groove (150) via the slider (602).

10. An argon arc welding machine for processing automotive parts according to claim 9, characterized in that, There are two support rods (300), and they are configured such that when one support rod (300) drives the hub (500) to be located at the welding station (110), the other support rod (300) drives the other hub (500) to move towards the balance test station (120).

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