Equipment for welding circumferential weld seams in wheel hubs

Abstract

This invention provides a device for welding circumferential welds on wheel hubs, comprising a support base, a first motion module disposed on the support base along the X direction, a support column slidably connected to the first motion module, and a second motion module disposed on the support column along the Z direction, a double friction stir welding mechanism fixedly mounted on the second motion module, and a rotary table assembly fixedly mounted on the support base, with two sets of wheel hub clamping mechanisms mounted on the rotary table assembly, the two sets of wheel hub clamping mechanisms being arranged opposite to each other. This invention, through the first and second motion modules, enables movement of the double friction stir welding mechanism in the X and Z directions, and through the wheel hub clamping mechanisms, achieves angle adjustment and positioning clamping of the split wheel hub, ensuring precise wheel hub installation. The mutual cooperation of the double friction stir welding mechanism and the wheel hub clamping mechanisms enables precise friction stir welding of the circumferential weld on the split wheel hub.

Description

Technical Field

[0001] This invention belongs to the field of wheel hub processing technology, and specifically relates to a device for welding circumferential weld seams in wheel hubs. Background Technology

[0002] See Figure 1 As shown, a typical automotive wheel hub consists of a rim A and spokes B. Spokes B are located in the center of rim A, while rim A is located around the perimeter of spokes B in a ring-like structure. Currently, conventional automotive wheel hub manufacturing is mainly divided into one-piece wheels and two-piece wheels. One-piece wheels are formed by integral casting or by casting the spokes first and then spinning the rim; both utilize a one-piece molding technique. Two-piece wheels are manufactured by separately producing the spokes and rim, which are then welded together to form the automotive wheel hub.

[0003] See Figure 2 As shown, in a split-type wheel hub, after the spokes B and rim A are pressed together, a ring-shaped joint is formed at their mating surfaces. After friction stir welding, this joint forms a ring-shaped connecting weld I and a weld head feed plane II. However, because the ring-shaped connecting weld I of the split-type wheel hub is inclined, and friction stir welding is used, a keyhole is left at the end of the weld, which needs to be filled. Currently, friction stir welding of ring-shaped welds is mainly done manually, which is time-consuming. Furthermore, because ring-shaped welds require sufficiently high welding strength, workers need high welding skills, but such highly skilled workers are scarce in the market. Therefore, there is an urgent need for equipment that can replace manual labor and efficiently complete the welding of ring-shaped welds on split-type wheel hubs. Summary of the Invention

[0004] The purpose of this invention is to provide a device for welding annular weld seams on wheel hubs in order to solve the above-mentioned problems. The device can realize efficient friction stir welding of annular weld seams on split wheel hubs.

[0005] The present invention adopts the following technical solution to achieve the above objectives:

[0006] An apparatus for welding circumferential weld seams in wheel hubs includes a support base, on which a first motion module is arranged along the X direction; a support column is slidably connected to the first motion module, and a second motion module is arranged along the Z direction on the support column; a double friction stir welding mechanism is fixedly mounted on the second motion module; a rotary table assembly is fixedly mounted on the support base, and two sets of wheel hub clamping mechanisms are mounted on the rotary table assembly, the two sets of wheel hub clamping mechanisms being arranged opposite to each other; the wheel hub clamping mechanisms are located below the double friction stir welding mechanism.

[0007] In a preferred embodiment, the support base includes a main bed and an auxiliary bed, which are T-shaped; the first motion module is fixedly mounted on the main bed, and the rotary table assembly is fixedly mounted on the auxiliary bed.

[0008] As a preferred embodiment, the first motion module includes an X-direction motion guide rail and an X-direction motion transmission screw fixedly installed on the main bed. An X-direction motion drive motor is fixedly connected to one end of the X-direction motion transmission screw. An X-direction motion slider is slidably connected on the X-direction motion guide rail. A column mounting plate is fixedly connected to the X-direction motion slider. A support column is fixedly installed on the column mounting plate.

[0009] As a preferred embodiment, the second motion module includes a Z-direction motion guide rail and a Z-direction motion transmission screw fixedly installed on the support column. A Z-direction motion drive motor is fixedly connected to one end of the Z-direction motion transmission screw. A Z-direction motion slider is slidably connected on the Z-direction motion guide rail. A friction welding machine mounting plate is fixedly installed on the Z-direction motion slider. A double stir friction welding mechanism is fixedly installed on the friction welding machine mounting plate.

[0010] As a preferred embodiment, the dual friction stir welding mechanism includes two friction stir welding machines arranged side by side along the Z direction. Both friction stir welding machines are fixedly mounted on a friction welding machine mounting plate. A balance cylinder piston mounting block is mounted on the back of the friction welding machine mounting plate, and a hydraulic balance cylinder is connected to the balance cylinder piston mounting block.

[0011] As a preferred embodiment, the friction stir welding machine includes a friction welding machine spindle mounting turntable, a friction welding machine spindle angle adjustment bolt is provided on the side of the friction welding machine spindle mounting turntable, a friction welding machine spindle box is fixedly mounted on the friction welding machine spindle mounting turntable, a friction welding machine spindle is provided inside the friction welding machine spindle box, and a replaceable welding head is provided at the end of the friction welding machine spindle.

[0012] As a preferred embodiment, a friction welding machine spindle motor is fixedly connected to one end of the friction welding machine spindle opposite to the replaceable welding head. The friction welding machine spindle motor is connected to the friction welding machine spindle via a friction welding machine spindle coupling. The friction welding machine spindle motor is fixedly connected to the friction welding machine spindle box via a friction welding machine spindle mounting bracket.

[0013] As a preferred embodiment, a plurality of waist-shaped adjustment holes are provided on the friction welding machine spindle mounting turntable near the edge, and a friction welding machine spindle angle adjustment locking nut is provided on the waist-shaped adjustment hole.

[0014] As a preferred embodiment, the replaceable welding head includes a welding head and a plugging welding head, which are respectively installed on the ends of the main shafts of two friction stir welding machines.

[0015] As a preferred embodiment, the rotary table assembly includes a rotary table, a rotary driver is fixedly connected to the bottom of the rotary table, and a table clamping cylinder is fixedly installed on the auxiliary bed. After the rotary table moves into place, it is clamped by the table clamping cylinder.

[0016] As a preferred embodiment, an L-shaped placement slot is provided on one side of the auxiliary bed, and the rotary drive is placed in the L-shaped placement slot.

[0017] As a preferred embodiment, the wheel hub clamping mechanism includes a clamping adjustment bracket assembly, which is fixedly mounted on the rotary table assembly. A workpiece driving assembly is connected to the clamping adjustment bracket assembly, and a workpiece positioning and clamping assembly is provided inside the workpiece driving assembly.

[0018] As a preferred embodiment, the clamp adjustment bracket assembly includes a clamp bottom mounting plate connected to the rotary table assembly, a clamp fixed side plate mounted on the clamp bottom mounting plate, a clamp movable side plate rotatably connected to the clamp fixed side plate via a movable side plate pivot, a clamp top panel fixedly mounted on the clamp movable side plate, and the clamp fixed side plate and the clamp movable side plate connected together by a clamping surface angle adjustment nut.

[0019] As a preferred embodiment, Y-direction adjustment holes are provided on both sides of the bottom mounting plate of the clamp, and clamp locking screws are provided in the Y-direction adjustment holes.

[0020] As a preferred embodiment, an arc-shaped adjustment hole is provided on the side of the fixture fixed side plate and the fixture movable side plate opposite to the movable side plate pivot. The angle between the two arc-shaped adjustment holes is locked by a clamping surface angle locking nut.

[0021] As a preferred embodiment, clamp Y-direction nut adjustment mechanisms are respectively provided at both ends of the rotary table assembly. After the clamp adjustment bracket assembly is adjusted into place, it is locked together with the rotary table assembly by the clamp Y-direction nut adjustment mechanisms at both ends.

[0022] As a preferred embodiment, the workpiece driving assembly includes a workpiece driving motor, a workpiece driving transmission gear set connected to the output end of the workpiece driving motor, a workpiece mounting plate and a drive lever mounting plate fixedly connected to the workpiece driving transmission gear set, the drive lever mounting plate being disposed on the upper part of the workpiece mounting plate, and a drive lever connected to the drive lever mounting plate.

[0023] As a preferred embodiment, a workpiece mounting plate support slider is provided at the lower part of the workpiece mounting plate, below the axis of the welding machine.

[0024] As a preferred embodiment, the workpiece positioning and clamping assembly includes a workpiece clamping cylinder, which is connected to a clamping force transmission shaft. A positioning mandrel is mounted on the clamping force transmission shaft, and a clamping plate is fixedly mounted on the positioning mandrel. A mandrel screw is fixedly mounted on the top of the clamping plate.

[0025] In a preferred embodiment, the clamping force transmission shaft, the center shaft, and the center hole of the hub are coaxially arranged.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The equipment for welding circumferential weld seams of wheel hubs described in this invention enables movement of the dual friction stir welding mechanism in both the X and Z directions via a first motion module arranged along the X direction on a support base and a second motion module arranged along the Z direction on a support column. The rotating disc mounted on the main shaft of the dual friction stir welding mechanism, under the action of the main shaft angle adjustment bolt, allows the mechanism to rotate around its center, thereby adjusting the angle of the main shaft. This angle adjustment allows for the adjustment of the forward tilt angle of the friction stir welding process parameters, ensuring the accuracy and stability of the friction stir welding process. The rotating worktable assembly, driven by a rotary driver, linearly rotates, delivering the workpieces from the two sets of wheel hub clamping mechanisms to the bottom of the dual friction stir welding mechanism in one go, achieving dual-station switching between workpiece clamping and processing. The wheel hub clamping mechanism enables angle adjustment and positioning clamping of split-type wheel hubs, ensuring accurate wheel hub installation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the wheel hub structure;

[0029] Figure 2 A schematic diagram of the welding process for a split-type wheel hub;

[0030] Figure 3 This is a schematic diagram of the overall structure of the equipment used for welding the circumferential weld seam of a wheel hub in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure for the installation of the support base, the first motion module, the second motion module, and the dual friction stir welding mechanism of the present invention.

[0032] Figure 5 This is a schematic diagram of the overall structure of the dual friction stir welding mechanism in an embodiment of the present invention;

[0033] Figure 6 This is a front view of the dual friction stir welding mechanism in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the overall structure of the rotary table assembly and hub clamping mechanism in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the hub clamp mechanism in an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram illustrating the principle of adjusting the welding tilt angle in an embodiment of the present invention.

[0037] The diagram shows: A. Rim; B. Spokes; I. Circular connecting weld; II. Weld head feed plane; 100. Support base; 101. Main bed; 102. Auxiliary bed; 1021. L-shaped placement slot; 200. First motion module; 201. X-direction motion guide rail; 202. X-direction motion transmission screw; 203. X-direction motion drive motor; 204. X-direction motion slider; 205. Column mounting plate; 300. Support column; 400. Second motion module; 401. Z-direction motion guide rail; 402. Z-direction motion transmission screw; 403. Z-direction motion drive motor; 4 04. Z-direction motion slider; 405. Friction welding machine mounting plate; 500. Double stir friction welding mechanism; 501. Friction stir welding machine; 5011. Friction welding machine spindle mounting turntable; 50111. Waist-shaped adjustment hole; 50112. Friction welding machine spindle angle adjustment locking nut; 5012. Friction welding machine spindle angle adjustment bolt; 5013. Friction welding machine spindle box; 5014. Friction welding machine spindle; 5015. Replaceable welding head; 50151. Welding head; 50152. Hole plugging welding head; 5016. Friction welding machine spindle motor; 5017. Friction welding machine main... Shaft coupling; 5018, Friction welding machine spindle mounting bracket; 502, Balance cylinder piston mounting block; 503, Hydraulic balance cylinder; 600, Rotary worktable assembly; 601, Rotary worktable; 602, Rotary driver; 603, Worktable clamping cylinder; 700, Hub clamping mechanism; 701, Clamping adjustment bracket assembly; 7011, Clamping bottom mounting plate; 7012, Clamping fixed side plate; 7013, Movable side plate shaft; 7014, Clamping movable side plate; 7015, Clamping top panel; 7016, Clamping surface angle adjustment nut; 7017, Clamping Y-direction adjustment hole; 7018 7019. Clamping locking screw; 70110. Arc-shaped adjustment hole; 70111. Clamping surface angle locking nut; 70111. Clamping Y-direction nut adjustment mechanism; 702. Workpiece drive assembly; 7021. Workpiece drive motor; 7022. Workpiece drive transmission gear set; 7023. Workpiece mounting plate; 7024. Drive lever mounting plate; 7025. Drive lever; 7026. Workpiece mounting plate support slider; 703. Workpiece positioning and clamping assembly; 7031. Workpiece clamping cylinder; 7032. Clamping force transmission shaft; 7033. Positioning mandrel; 7034. Clamping plate; 7035. Mandrel screw. Detailed Implementation

[0038] 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.

[0039] Please see Figures 3 to 8 As shown, this embodiment of the invention provides a device for welding annular weld seams in wheel hubs, specifically including a support base 100 for fixing and supporting the entire device. A first motion module 200 is arranged on the support base 100 along the X direction. A support column 300 is slidably connected to the first motion module 200. A second motion module 400 is arranged on the support column 300 along the Z direction. A double friction stir welding mechanism 500 is fixedly installed on the second motion module 400. A rotary table assembly 600 is fixedly installed on the support base 100. Two sets of wheel hub clamping mechanisms 700 are installed on the rotary table assembly 600, and the two sets of wheel hub clamping mechanisms 700 are arranged opposite to each other. The wheel hub clamping mechanisms 700 are located below the double friction stir welding mechanism 500. In this embodiment, the movement of the dual friction stir welding mechanism 500 in the X and Z directions can be achieved by a first motion module 200 arranged along the X direction on the support base 100 and a second motion module 400 arranged along the Z direction on the support column 300. The friction stir welding mechanism 500 can rotate around its center by the friction welding machine spindle mounting turntable 5011 on the dual friction stir welding mechanism 500 under the action of the friction welding machine spindle angle adjustment bolt 5012, thereby adjusting the angle of the friction stir welding machine spindle 5014. This angle adjustment allows for the adjustment of the forward tilt angle of the friction stir welding process parameters, ensuring the accuracy and stability of friction stir welding. The rotary table assembly 600 rotates linearly under the action of the rotary driver 602, sending the workpieces from the two sets of hub clamping mechanisms 700 to the bottom of the dual friction stir welding mechanism in one go, realizing a dual-station switching between workpiece clamping and workpiece processing. The hub clamping mechanism 700 enables angle adjustment and positioning clamping of split hubs, ensuring precise hub installation.

[0040] Please see Figure 3 and 4As shown, the support base 100 specifically includes a main bed 101 and an auxiliary bed 102. The main bed 101 and the auxiliary bed 102 form a T-shaped structure, and together they constitute the installation foundation of this equipment. The first motion module 200 is fixedly installed on the main bed 101, and the rotary table assembly 600 is fixedly installed on the auxiliary bed 102. The first motion module 200 includes an X-direction motion guide rail 201 and an X-direction motion transmission screw 202 fixedly installed on the main bed 101. An X-direction motion drive motor 203 is fixedly connected to one end of the X-direction motion transmission screw 202. An X-direction motion slider 204 is slidably connected to the X-direction motion guide rail 201. A column mounting plate 205 is fixedly connected to the X-direction motion slider 204, and a support column 300 is fixedly installed on the column mounting plate 205. The second motion module 400 includes a Z-direction motion guide rail 401 and a Z-direction motion transmission screw 402 fixedly mounted on the support column 300. A Z-direction motion drive motor 403 is fixedly connected to one end of the Z-direction motion transmission screw 402. A Z-direction motion slider 404 is slidably connected to the Z-direction motion guide rail 401. A friction welding machine mounting plate 405 is fixedly mounted on the Z-direction motion slider 404, and a double stir friction welding mechanism 500 is fixedly mounted on the friction welding machine mounting plate 405. In this embodiment, the X-direction motion guide rail 201, the X-direction motion transmission screw 202, and the X-direction motion drive motor 203 together constitute the drive execution system for the X-direction motion of this equipment. The support column 300 is mounted on the main bed 101 and is connected to the X-direction motion guide rail 201 and the X-direction motion transmission screw 202 via the column mounting plate 205 and the X-direction motion slider 204 located below it. The support column 300 is mounted on the column mounting plate 205. The Z-direction motion drive system consists of a Z-direction motion guide rail 401, a Z-direction motion transmission screw 402, and a Z-direction motion drive motor 403, all fixedly mounted on the support column 300. Through the first motion module 200 set in the X direction and the second motion module 400 set in the Z direction, linear motion of the dual friction stir welding mechanism 500 in the X and Z directions can be achieved.

[0041] Please see Figure 5 and 6As shown, the dual friction stir welding mechanism 500 specifically includes two friction stir welding machines 501 arranged side by side along the Z direction. Both friction stir welding machines 501 are fixedly mounted on a friction welding machine mounting plate 405. A balance cylinder piston mounting block 502 is mounted on the back of the friction welding machine mounting plate 405, and a hydraulic balance cylinder 503 is connected to the balance cylinder piston mounting block 502. In this embodiment, the hydraulic balance cylinder 503 is used to balance the stability of the dual friction stir welding mechanism 500 mounted on the support column 300, ensuring the stability of the dual friction stir welding mechanism 500 during friction stir welding.

[0042] Please see Figure 6As shown, the friction stir welding machine 501 specifically includes a friction welding machine spindle mounting turntable 5011. A friction welding machine spindle angle adjusting bolt 5012 is provided on the side of the friction welding machine spindle mounting turntable 5011. A friction welding machine spindle box 5013 is fixedly mounted on the friction welding machine spindle mounting turntable 5011. A friction welding machine spindle 5014 is provided inside the friction welding machine spindle box 5013. A replaceable welding head 5015 is provided at the end of the friction welding machine spindle 5014. Multiple oblong adjusting holes 50111 are provided near the edge of the friction welding machine spindle mounting turntable 50111, and friction welding machine spindle angle adjusting locking nuts 50112 are provided in the oblong adjusting holes 50111. In this embodiment, a friction welding machine spindle angle adjustment bolt 5012 is provided on the side of the friction welding machine spindle mounting turntable 5011. One end of the friction welding machine spindle angle adjustment bolt 5012 is connected to the friction welding machine mounting plate 405, and the other end is connected to the friction welding machine spindle mounting turntable 5011. Multiple oblong adjustment holes 50111 are provided near the edge of the friction welding machine spindle mounting turntable 5011 (in this embodiment, four oblong adjustment holes 50111 are provided along the circumferential direction near the edge of the friction welding machine spindle mounting turntable 50111), and a friction welding machine spindle angle adjustment locking nut 50112 is provided in each oblong adjustment hole 50111. In this embodiment, the friction welding machine spindle mounting turntable 5011 can rotate around its center under the action of the friction welding machine spindle angle adjusting bolt 5012 (in this embodiment, the friction welding machine spindle angle adjusting bolt 5012 is preferably a double-ended bolt with both positive and negative threads, which is connected to the friction welding machine spindle mounting turntable 5011. When the double-ended bolt is manually rotated, the rotation angle of the friction welding machine spindle mounting turntable 5011 can be adjusted). This allows for the adjustment of the angle of the friction welding machine spindle 5014 on it. After adjustment, the friction welding machine spindle angle adjusting locking nut 50112 is tightened through the corresponding oblong adjusting hole 50111 to lock the angle of the friction welding machine spindle mounting turntable 5011. This angle adjustment allows for the adjustment of the forward tilt angle of the friction stir welding process parameters. To further optimize this embodiment, an angle adjustment dial (not shown in the figure) is provided on the welding machine mounting plate 405 at a position corresponding to the waist-shaped adjustment hole 50111. The adjustment angle of the friction welding machine spindle mounting turntable 5011 can be observed through the angle adjustment dial.

[0043] Below we combine Figure 9As shown, this section introduces the principle of tilt angle adjustment in friction stir welding and keyhole filling. In the circumferential weld, the direction of the welding head's movement is tangential to the weld. The spindle (i.e., the friction welding machine spindle 5014) is initially in position AB, with a tilt angle of 0. By adjusting the radial distance d, the spindle is initially in position A, B, with a tilt angle of 'a'. Therefore, adjusting the radial movement distance allows for adjustment of the tilt angle 'a' (i.e., adjusting the rotation angle of the friction welding machine spindle mounting turntable 5011 by manually rotating the spindle angle adjusting bolt 5012). We know that the tilt angle in friction stir welding is related to the welding process parameters; for specific welding materials and processes, the tilt angle is basically fixed. Therefore, in this embodiment of the invention, depending on the welding object and process, the dual friction stir welding mechanism 500 (two friction stir welding machines 501) is pre-adjusted before welding by adjusting the angle adjustment bolt 5012 of the main shaft of the friction welding machine, and the position is locked by the angle adjustment locking nut 50112 of the main shaft of the friction welding machine, so as to ensure that the forward tilt angle remains unchanged during the friction stir welding process.

[0044] Please see Figure 6 As shown, a friction welding machine spindle motor 5016 is fixedly connected to one end of the friction welding machine spindle 5014 opposite to the replaceable welding head 5015. The friction welding machine spindle motor 5016 is connected to the friction welding machine spindle 5014 via a friction welding machine spindle coupling 5017, and is fixedly connected to the friction welding machine spindle box 5013 via a friction welding machine spindle mounting bracket 5018. In this embodiment, the friction welding machine spindle motor 5016 drives the replaceable welding head 5015 on the friction welding machine spindle 5014 to perform friction stir welding on the wheel hub and to fill the keyhole after welding.

[0045] Please see Figure 6 As shown, the replaceable welding head 5015 includes a welding head 50151 and a plugging welding head 5015. The welding head 50151 and the plugging welding head 50152 are respectively installed on the front end of the friction welding machine spindle 5014 of the two friction stir welding machines 501. In this embodiment, the two friction stir welding machines 501 have completely identical structures, but the two friction stir welding machines 501 can achieve different functions by installing different friction stir welding heads. Specifically, the welding head 50151 installed on the front end of the friction welding machine spindle 5014 of one friction stir welding machine 501 is used to weld circumferential welds; the plugging welding head 50152 installed on the front end of the friction stir welding machine spindle 5014 of the other friction stir welding machine 501 is used to fill the keyhole after welding (for the specific process of filling the keyhole in friction stir welding, please refer to CN202110817549.X).

[0046] Please see Figure 7 As shown, the rotary table assembly 600 specifically includes a rotary table 601. A rotary driver 602 is fixedly connected to the bottom of the rotary table 601, and a table clamping cylinder 603 is fixedly installed on the auxiliary bed 102. After the rotary table 601 moves into position, it is clamped by the table clamping cylinder 603. An L-shaped placement slot 1021 is provided on one side of the auxiliary bed 102, and the rotary driver 602 is placed in the L-shaped placement slot 1021. In this embodiment, the rotary driver 602 is preferably a two-position rotary driver 602. The rotary table 601 can rotate under the action of the two-position rotary driver 602, sending the workpieces in the two hub clamping mechanisms 700 to the bottom of the double friction stir welding mechanism 500 at one time, realizing the dual-position switching of workpiece clamping and workpiece processing. At the same time, the table clamping cylinder located on the auxiliary bed 102 can clamp the rotary table 601 in the working position to ensure that the rotary table 601 can maintain a stable position during operation.

[0047] Please see Figure 7 and Figure 8 As shown, the wheel hub clamping mechanism 700 includes a clamping adjustment bracket assembly 701 for adjusting the working angle of the wheel hub clamp. The clamping adjustment bracket assembly 701 is fixedly mounted on the rotary table assembly 600. A workpiece driving assembly 702 is connected to the clamping adjustment bracket assembly 701, and a workpiece positioning and clamping assembly 703 is disposed within the workpiece driving assembly 702. The specific structure and function of the adjustment bracket assembly 701, the workpiece driving assembly 702, and the workpiece positioning and clamping assembly 703 are described below. In this embodiment, there are two wheel hub clamping mechanisms 700. One wheel hub clamping mechanism 700 is located directly below the double friction stir welding mechanism 500, at which time the workpiece is in a welding or keyhole blocking state; the other wheel hub clamping mechanism 700 is located at the outer end of the double friction stir welding mechanism 500, and is in a workpiece loading and unloading state.

[0048] Please see Figure 7 and Figure 8As shown, the fixture adjustment bracket assembly 701 specifically includes a fixture bottom mounting plate 7011 connected to the rotary table assembly 600. A fixture fixing side plate 7012 is mounted on the fixture bottom mounting plate 7011. A fixture movable side plate 7014 is rotatably connected to the fixture fixing side plate 7012 via a movable side plate pivot 7013. A fixture upper panel 7015 is fixedly mounted on the fixture movable side plate 7014. The fixture fixing side plate 7012 and the fixture movable side plate 7014 are connected together by a clamping surface angle adjustment nut 7016. In this embodiment, the rotatable connection between the fixture fixing side plate 7012 and the fixture movable side plate 7014 via the movable side plate pivot 7013 allows for adjustment of the angles of the workpiece driving assembly 702 and the workpiece positioning and clamping assembly 703 mounted on the fixture upper panel 7015. After adjustment, the clamping surface angle adjustment nut 7016 locks the connection together. The bottom mounting plate 7011 of the clamp has Y-direction adjustment holes 7017 on both sides, and clamp locking screws 7018 are installed in the Y-direction adjustment holes 7017. The Y-direction adjustment holes 7017 can be used to adjust the wheel hub clamp mechanism 700 in the Y direction, and the clamp locking screws 7018 can be used to lock it after adjustment.

[0049] For further optimization of this embodiment, please refer to [link / reference]. Figure 7 and Figure 8 As shown, arc-shaped adjustment holes 7019 are provided on the side of both the fixed side plate 7012 and the movable side plate 7014 of the fixture, opposite to the rotating shaft 7013 of the movable side plate. The two arc-shaped adjustment holes 7019 are locked together by a clamping surface angle locking nut 70110. The included angle between the fixed side plate 7012 and the movable side plate 7014 of the fixture can be adjusted through the arc-shaped adjustment holes 7019. After the included angle between the fixed side plate 7012 and the movable side plate 7014 of the fixture is adjusted, it is locked by the clamping surface angle locking nut 70110. A fixture Y-direction nut adjustment mechanism 70111 is provided at both ends of the rotary table assembly 600. After the fixture adjustment bracket assembly 701 is adjusted into place, it is locked together with the rotary table assembly 600 by the fixture Y-direction nut adjustment mechanisms 70111 at both ends.

[0050] Please see Figure 7 and Figure 8As shown, the workpiece driving assembly 702 specifically includes a workpiece driving motor 7021. A workpiece driving transmission gear set 7022 is connected to the output end of the workpiece driving motor 7021. A workpiece mounting plate 7023 and a drive lever mounting disk 702 are fixedly connected to the workpiece driving transmission gear set 7022. The drive lever mounting disk 7024 is located on the upper part of the workpiece mounting plate 7023, and a drive lever 7025 is connected to the drive lever mounting disk 7024. A workpiece mounting plate support slider 7026 is provided on the lower part of the workpiece mounting plate 7023, below the welding machine axis. In this embodiment, the driving power is provided by the workpiece driving motor 7021, and the workpiece driving transmission gear set 7022 transmits the driving power to the workpiece mounting plate 7023 and the drive lever 7025. When installing the workpiece, the drive lever 7025 is inserted into the mounting screw hole of the hub. When the workpiece mounting plate 7023 and the drive lever 7025 rotate, the workpiece will rotate around the center of the fixture (see...). Figure 1 The C-axis rotates. A workpiece mounting plate support slider 7026 is located at the lower part of the workpiece mounting plate 7023, below the welding machine axis, to balance the huge upsetting force during the welding process.

[0051] Please see Figure 7 and Figure 8 As shown, the workpiece positioning and clamping assembly 703 specifically includes a workpiece clamping cylinder 7031, which is connected to a clamping force transmission shaft 7032. A positioning mandrel 7033 is mounted on the clamping force transmission shaft 7032, and a clamping plate 7034 is fixedly mounted on the positioning mandrel 7033. A mandrel screw 7035 is fixedly mounted on the top of the clamping plate 7034. The clamping force transmission shaft 7032 and the mandrel screw 7035 are coaxially arranged with the center hole of the hub. In this embodiment, the workpiece clamping cylinder 7031 applies clamping force to the workpiece (hub) through the clamping force transmission shaft 7032, the clamping plate 7034, and the mandrel screw 7035, so that the hub is firmly pressed onto the workpiece mounting plate 7023. At the same time, the center hole of the hub is coaxial with the positioning mandrel 7033 and is installed with a very small clearance, ensuring the accuracy of the hub installation position. In this embodiment, the positioning mandrel 7033 is prefabricated and manufactured in advance according to the size of the center hole of the object being processed (wheel hub). The manufacturing requirement is that the outer diameter of the positioning mandrel 7033 and the center hole of the wheel hub can achieve a clearance fit with a fit tolerance of less than 0.8mm. At the same time, the mandrel screw 7035 must also be adjusted to a suitable height to adapt to the height of the center end face of the object being processed (wheel hub).

[0052] The following is a technical description of the workflow of the equipment used for welding the circumferential weld seam of the wheel hub in this embodiment:

[0053] S1. According to the welding material and process requirements, adjust the angle adjustment bolt 5012 of the friction welding machine spindle on one of the friction stir welding machines 501 so that the forward tilt angle of the welding head 50151 meets the process requirements.

[0054] S2. Based on the structure of the welding head 50151, adjust the angle adjustment bolt 5012 of the main shaft of the friction welding machine on another friction welding machine 501 so that the forward tilt angle of the plugging welding head 50152 meets the process requirements.

[0055] S3. Remove the spindle screw 7035 and the clamping plate 7034, replace with a suitable positioning spindle 7033, and adjust the height of the spindle screw 7035 so that the fixture is suitable for the wheel hub to be processed.

[0056] S4. Install the workpiece and start the workpiece positioning and clamping assembly 703 to enable the workpiece to be positioned and clamped.

[0057] S5. Rotate the fixture with the workpiece mounted to directly below the friction stir welding machine 501;

[0058] S6. Adjust the friction stir welding machine 501 in the X direction by controlling the movement of the first motion module 200;

[0059] S7. The position of the weld in the Y direction is adjusted by adjusting the Y-direction nut adjustment mechanism 70111;

[0060] S8. By driving the welding head 50151 on the main shaft 5014 of the friction welding machine to rotate and move in the negative Z direction, the feed is stopped after reaching the welding position;

[0061] S9. The workpiece drive assembly 702 is working. The workpiece rotates around the axis of the fixture. After one revolution, the welding is completed and the rotation stops. At this time, the welding key hole is located directly below the friction stir welding machine 501.

[0062] S10. Drive the welding head 50151 on the main shaft 5014 of the friction welding machine to rotate and move in the positive Z direction to reach the initial movement position of the welding machine.

[0063] S11. The plugging welding head 50152 on the main shaft 5014 of the friction welding machine is in a plugging state. By controlling the first motion module 200, the X-direction adjustment is completed so that the plugging welding head 50152 on the main shaft 5014 of the friction welding machine is located directly above the welding position.

[0064] S12, the workpiece drive assembly 702 works, causing the keyhole to rotate around the axis of the fixture by an angle, the size of which is related to the size of the welding keyhole;

[0065] S13. Drive the plugging welding head 50152 on the main shaft 5014 of the friction welding machine to rotate and move in the negative Z direction. After reaching the welding position, stop feeding.

[0066] S14. The workpiece drive assembly 702 operates, and the workpiece rotates around the axis of the fixture, with the rotation direction facing the keyhole.

[0067] S15. When the keyhole moves to the plugging welding head 50152 on the main spindle 5014 of the driving friction welding machine, the workpiece stops rotating and the plugging welding head 50152 on the main spindle 5014 of the driving friction welding machine moves in the positive Z direction to reach its initial position, thus completing the keyhole plugging operation.

[0068] S16. Move the fixture out of the welding work position to the workpiece loading and unloading work position, remove the part, and complete the welding.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for wheel hub ring seam welding, characterized by: The system includes a support base (100), on which a first motion module (200) is arranged along the X direction; a support column (300) is slidably connected to the first motion module (200), and a second motion module (400) is arranged along the Z direction on the support column (300); a double friction stir welding mechanism (500) is fixedly installed on the second motion module (400); a rotary table assembly (600) is fixedly installed on the support base (100), and two sets of wheel hub clamping mechanisms (700) are installed on the rotary table assembly (600), with the two sets of wheel hub clamping mechanisms (700) arranged opposite to each other; the wheel hub clamping mechanisms (700) are located below the double friction stir welding mechanism (500); The hub clamping mechanism (700) includes a clamping adjustment bracket assembly (701), which is fixedly mounted on the rotary table assembly (600). A workpiece driving assembly (702) is connected to the clamping adjustment bracket assembly (701), and a workpiece positioning and clamping assembly (703) is provided in the workpiece driving assembly (702). The clamp adjustment bracket assembly (701) includes a clamp bottom mounting plate (7011) connected to the rotary table assembly (600), a clamp fixing side plate (7012) is mounted on the clamp bottom mounting plate (7011), a clamp movable side plate (7014) is rotatably connected to the clamp fixing side plate (7012) via a movable side plate pivot (7013), a clamp top panel (7015) is fixedly mounted on the clamp movable side plate (7014), and the clamp fixing side plate (7012) and the clamp movable side plate (7014) are connected together by a clamping surface angle adjustment nut (7016). The workpiece driving assembly (702) includes a workpiece driving motor (7021), a workpiece driving transmission gear set (7022) is connected to the output end of the workpiece driving motor (7021), a workpiece mounting plate (7023) and a drive lever mounting plate (7024) are fixedly connected to the workpiece driving transmission gear set (7022), the drive lever mounting plate (7024) is located on the upper part of the workpiece mounting plate (7023), and a drive lever (7025) is connected to the drive lever mounting plate (7024). The workpiece positioning and clamping assembly (703) includes a workpiece clamping cylinder (7031), which is connected to a clamping force transmission shaft (7032). A positioning mandrel (7033) is mounted on the clamping force transmission shaft (7032), and a clamping plate (7034) is fixedly mounted on the positioning mandrel (7033). A mandrel screw (7035) is fixedly mounted on the top of the clamping plate (7034).

2. The apparatus for welding of the wheel hub annular weld according to claim 1, characterized in that: The support base (100) includes a main bed (101) and an auxiliary bed (102), the main bed (101) and the auxiliary bed (102) forming a T-shaped structure; the first motion module (200) is fixedly installed on the main bed (101), and the rotary table assembly (600) is fixedly installed on the auxiliary bed (102).

3. The apparatus for welding of the wheel hub annular weld according to claim 2, characterized in that: The first motion module (200) includes an X-direction motion guide rail (201) and an X-direction motion transmission screw (202) fixedly installed on the main bed (101). An X-direction motion drive motor (203) is fixedly connected to one end of the X-direction motion transmission screw (202). An X-direction motion slider (204) is slidably connected on the X-direction motion guide rail (201). A column mounting plate (205) is fixedly connected to the X-direction motion slider (204). A support column (300) is fixedly installed on the column mounting plate (205).

4. The apparatus for welding of the wheel hub annular weld according to claim 3, characterized in that: The second motion module (400) includes a Z-direction motion guide rail (401) and a Z-direction motion transmission screw (402) fixedly installed on the support column (300). A Z-direction motion drive motor (403) is fixedly connected to one end of the Z-direction motion transmission screw (402). A Z-direction motion slider (404) is slidably connected on the Z-direction motion guide rail (401). A friction welding machine mounting plate (405) is fixedly installed on the Z-direction motion slider (404). A double stir friction welding mechanism (500) is fixedly installed on the friction welding machine mounting plate (405).

5. The apparatus for welding of the wheel hub annular weld according to claim 4, characterized in that: The dual friction stir welding mechanism (500) includes two friction stir welding machines (501) arranged side by side along the Z direction. Both friction stir welding machines (501) are fixedly installed on the friction welding machine mounting plate (405). A balance cylinder piston mounting block (502) is installed on the back of the friction welding machine mounting plate (405). A hydraulic balance cylinder (503) is connected to the balance cylinder piston mounting block (502).

6. The apparatus for welding of the wheel hub annular weld according to claim 5, characterized in that: The friction stir welding machine (501) includes a friction welding machine spindle mounting turntable (5011), a friction welding machine spindle angle adjustment screw (5012) is provided on the side of the friction welding machine spindle mounting turntable (5011), a friction welding machine spindle box (5013) is fixedly installed on the friction welding machine spindle mounting turntable (5011), a friction welding machine spindle (5014) is provided inside the friction welding machine spindle box (5013), and a replaceable welding head (5015) is provided at the end of the friction welding machine spindle (5014).

7. The equipment for welding circumferential weld seams of wheel hubs according to claim 6, characterized in that: A friction welding machine spindle motor (5016) is fixedly connected to one end of the friction welding machine spindle (5014) opposite to the replaceable welding head (5015). The friction welding machine spindle motor (5016) is connected to the friction welding machine spindle (5014) through a friction welding machine spindle coupling (5017). The friction welding machine spindle motor (5016) is fixedly connected to the friction welding machine spindle box (5013) through a friction welding machine spindle mounting bracket (5018).

8. The equipment for welding circumferential weld seams of wheel hubs according to claim 6, characterized in that: Multiple waist-shaped adjustment holes (50111) are provided near the edge of the spindle mounting turntable (5011) of the friction welding machine, and the spindle angle adjustment locking screw (50112) of the friction welding machine is provided in the waist-shaped adjustment hole (50111).

9. The equipment for welding circumferential weld seams of wheel hubs according to claim 7, characterized in that: The replaceable welding head (5015) includes a welding head (50151) and a plugging welding head (50152), which are respectively installed on the ends of the friction welding machine spindles (5014) of the two friction stir welding machines (501).

10. The equipment for welding circumferential weld seams of wheel hubs according to claim 2, characterized in that: The rotary table assembly (600) includes a rotary table (601), a rotary driver (602) is fixedly connected to the bottom of the rotary table (601), and a table clamping cylinder (603) is fixedly installed on the auxiliary bed (102). After the rotary table (601) moves into place, it is clamped by the table clamping cylinder (603).

11. The equipment for welding circumferential weld seams of wheel hubs according to claim 10, characterized in that: An L-shaped placement slot (1021) is provided on one side of the auxiliary bed (102), and the rotary drive (602) is placed in the L-shaped placement slot (1021).

12. The equipment for welding circumferential weld seams of wheel hubs according to claim 1, characterized in that: The clamp has Y-direction adjustment holes (7017) on both sides of the bottom mounting plate (7011) and clamp locking screws (7018) are provided in the Y-direction adjustment holes (7017).

13. The equipment for welding circumferential weld seams of wheel hubs according to claim 1, characterized in that: Arc-shaped adjustment holes (7019) are provided on the side opposite to the pivot (7013) of the movable side plate (7014) of the clamping fixture fixed side plate (7012). The angle between the two arc-shaped adjustment holes (7019) is locked by clamping surface angle locking nuts (70110).

14. The equipment for welding circumferential weld seams of wheel hubs according to claim 1, characterized in that: A clamp Y-direction nut adjustment mechanism (70111) is provided at both ends of the rotary table assembly (600). After the clamp adjustment bracket assembly (701) is adjusted to the position, it is locked together with the rotary table assembly (600) by the clamp Y-direction nut adjustment mechanism (70111) at both ends.

15. The equipment for welding circumferential weld seams of wheel hubs according to claim 1, characterized in that: A workpiece mounting plate support slider (7026) is provided at the lower part of the workpiece mounting plate (7023) below the axis of the welding machine.

16. The equipment for welding circumferential weld seams of wheel hubs according to claim 1, characterized in that: The clamping force drive shaft (7032) and the spindle screw (7035) are coaxially arranged with the center hole of the hub.

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