Friction stir welding machine head assembly

Abstract

The utility model relates to the field of welding, in particular to a friction stir welding machine head assembly which comprises a fixing base provided with a driving shaft in the horizontal direction, and a spindle box is fixed to the driving shaft and swings in a pitching mode along with rotation of the driving shaft. A driving worm gear is coaxially arranged on the driving shaft, a driving worm driven by a worm motor to rotate is installed on the fixing base, and the driving worm and the driving worm gear are in worm and gear fit. Automatic adjustment of the inclination angle of the spindle box in the friction stir welding equipment is achieved, the adjustment precision is high, and locking is firm after adjustment.

Description

Technical Field

[0001] This utility model relates to the field of welding, specifically a friction stir welding head assembly. Background Technology

[0002] The spindle box is one of the core components of friction stir welding equipment, mainly used for mounting and driving the stirring head. It typically includes the following components: spindle: used to fix the stirring head and drive its rotation via a motor; drive motor: provides the power required for the rotation of the stirring head; tilt adjustment mechanism: used to adjust the angle between the stirring head and the workpiece surface.

[0003] Currently, the conventional method for adjusting the spindle box tilt angle is to fix the spindle box to a manual screw. During manual rotation of the screw, the angle is observed and adjusted using an angle dial or angle measuring instrument. After reaching the set angle, the spindle box is locked in place by tightening the lock nut. This manual adjustment method relies on the operator's experience, and reading errors may occur when using a level or angle gauge, resulting in inaccurate tilt angle adjustment. Furthermore, manual adjustment requires repeatedly loosening and loosening the locking device, adjusting the tilt angle, and tightening again, a cumbersome and time-consuming process. Uneven tightening of the lock nut can lead to insecure locking, causing slight changes in the tilt angle during welding and affecting the final weld quality. Therefore, a solution is urgently needed. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a friction stir welding head assembly. This utility model realizes automatic adjustment of the spindle box tilt angle in the friction stir welding equipment, with high adjustment accuracy and secure locking after adjustment.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A friction stir welding head assembly includes a fixed base with a drive shaft arranged horizontally, a spindle box fixed on the drive shaft and tilting as the drive shaft rotates; a drive worm gear is coaxially arranged on the drive shaft, and a drive worm gear driven to rotate by a worm motor is mounted on the fixed base, the drive worm gear and the drive worm wheel forming a worm gear and worm wheel fit.

[0007] As a further embodiment of this utility model: a linear power source is provided on the fixed base, and a clamping block is installed on the driving end of the linear power source. The linear travel trajectory of the clamping block intersects with the drive shaft. A support base is also provided on the fixed base. The support base and the clamping block are respectively arranged on both sides of the drive shaft. After the clamping block and the support base cooperate, they clamp the drive shaft to prevent rotation.

[0008] As a further improvement of this utility model: the linear power source is a drive cylinder arranged in the vertical direction, and the clamping block is arranged at the linear extension end of the drive cylinder.

[0009] As a further improvement of this utility model: the contact surface between the support base and the drive shaft is an arc-shaped surface corresponding to the diameter of the drive shaft, and the contact surface between the clamping block and the drive shaft is provided with a V-groove.

[0010] As a further improvement of this utility model, a power-off brake is provided on the fixed base and is coaxially arranged on the outer ring of the drive shaft.

[0011] As a further improvement of this utility model: a mounting groove is provided on the fixed base along the vertical direction, the spindle box is fixed in the mounting groove, and the drive shaft passes through the mounting groove to fix the spindle box.

[0012] As a further improvement of this utility model: a limit block is provided at the opening of the mounting groove, and the pitch swing trajectory of the spindle box intersects with the limit block.

[0013] As a further improvement of this utility model: a hydraulic three-jaw chuck is installed at the bottom of the spindle box, and the hydraulic three-jaw chuck is hydraulically driven to open and close to clamp the working tool holder; a rotary cylinder is arranged coaxially with the hydraulic three-jaw chuck inside the spindle box, and the rotary cylinder provides hydraulic power to the hydraulic three-jaw chuck through a hollow tie rod; the hydraulic three-jaw chuck is driven to rotate by the spindle motor.

[0014] As a further improvement of this utility model: the spindle motor is arranged outside the spindle box, and the motor shaft of the spindle motor drives the hydraulic three-jaw chuck to rotate synchronously through the transmission belt.

[0015] As a further embodiment of this utility model: a Z-axis guide rail is vertically arranged on the fixed base, and the fixed base is connected to a sliding block that slides in the horizontal direction through the Z-axis guide rail. The fixed base is driven by a lifting motor to move up and down along the Z-axis guide rail.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model achieves precise pitch and oscillation and stable support of the spindle box by driving the drive shaft to rotate through a worm gear, ensuring the stability of the welding process. Through the self-locking property of the worm gear, the spindle box is securely locked after the tilt angle is adjusted, avoiding slight changes in the tilt angle during welding and improving welding quality. It realizes the automatic adjustment of the spindle box tilt angle in the friction stir welding equipment, with high adjustment accuracy and secure locking after adjustment.

[0018] 2. After the tilt angle is adjusted, the hydraulic cylinder drives the clamping block to move downwards, which cooperates with the support seat to clamp the drive shaft. At the same time, the power-off brake cuts off the power to lock the drive shaft. Combined with the self-locking property of the worm gear, a triple locking safety is achieved for the drive shaft.

[0019] 3. The spindle box of this utility model adopts a hydraulic three-jaw chuck and rotary cylinder design, which can quickly change tools through hydraulic drive, improving tool changing efficiency and welding accuracy.

[0020] 4. The spindle motor of this utility model drives the hydraulic three-jaw chuck through a transmission belt, realizing efficient power transmission and stable rotational motion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the spindle box structure in this utility model.

[0023] In the picture:

[0024] 21. Fixed base; 22. Z-axis guide rail; 23. Slide; 24. Drive shaft;

[0025] 241. Drive worm gear; 242. Drive worm; 243. Worm motor; 244. Support base;

[0026] 245. Clamping block; 246. Drive cylinder; 247. Power-off brake;

[0027] 25. Spindle box; 251. Spindle motor; 252. Drive belt; 253. Hydraulic three-jaw chuck;

[0028] 254. Working tool holder; 255. Rotary hydraulic cylinder; 256. Hollow tie rod;

[0029] 26. Mounting slot; 27. Limiting block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-2In this embodiment of the present invention, a friction stir welding head assembly includes a fixed base 21. A U-shaped mounting groove 26 is formed on one side of the fixed base 21 along the vertical direction for mounting a spindle box 25. A Z-axis guide rail 22 is provided on the side of the fixed base 21 opposite to the mounting groove 26 along the vertical direction, and the fixed base 21 slides vertically along the Z-axis guide rail 22. A slide block 23 is also mounted on the guide rail seat of the Z-axis guide rail 22, and the Z-axis guide rail 22 slides along the X-axis guide rail via the slide block 23. The X-axis guide rail, Y-axis guide rail, and Z-axis guide rail 22 cooperate to form a three-axis slide module, thereby driving the fixed base 21 to adjust its position.

[0032] The drive shaft 24 passes horizontally through the fixed base 21 and the spindle box 25. The drive shaft 24 and the fixed base 21 are in a rotary fit. The spindle box 25 is fixed to the shaft of the drive shaft 24 and adjusts the pitch position as the drive shaft 24 rotates. A limit block 27 is provided at the opening of the mounting slot 26. The pitch movement trajectory of the spindle box 25 intersects with the limit block 27. By adjusting the position of the limit block 27, the maximum pitch swing angle of the spindle box 25 is limited.

[0033] A drive worm gear 241 is coaxially fixed on the drive shaft 24. Two sets of bearing housings are mounted on the fixed base 21, and a drive worm 242 is installed between the two sets of bearing housings. The drive worm 242 and the drive worm gear 241 form a worm gear engagement. The worm motor 243 on the fixed base 21 drives the drive worm 242 to rotate through a clutch. The drive worm 242 drives the drive shaft 24 and the spindle box 25 to rotate through the worm gear transmission to adjust the welding tilt angle.

[0034] The fixed base 21 is equipped with a support base 244 located below the drive shaft 24 and a drive cylinder 246 located above the drive shaft 24. The contact surface between the support base 244 and the drive shaft 24 is an arc surface, and the radius of the arc surface corresponds to the radius of the drive shaft 24. The drive end of the drive cylinder 246 drives the clamping block 245 to move vertically. After the clamping block 245 abuts against the drive shaft 24, the clamping block 245 and the support base 244 clamp and position the drive shaft 24, realizing the emergency stop of the drive shaft 24. The contact surface between the clamping block 245 and the drive shaft 24 has a V-groove. To achieve double stop protection, a power-off brake 247 is also coaxially installed on the drive shaft 24. The power-off brake 247 is existing technology, so its structure will not be described in detail. The drive shaft 24 and the fixed seat 21 are locked by power-off brake 247. Combined with the clamping of clamp block 245 and the self-locking property of worm gear, a triple locking safety is achieved for the drive shaft 24.

[0035] A rotary cylinder 255 is installed inside the spindle box 25. A hydraulic three-jaw chuck 253 is rotatably mounted at the bottom of the spindle box 25, and the hydraulic three-jaw chuck 253 hydraulically drives the three-jaw chuck to clamp the working tool holder 254. The rotary cylinder 255 provides hydraulic power to the hydraulic three-jaw chuck 253 through a hollow tie rod 256 inside the spindle box 25. A spindle motor 251 is vertically mounted outside the spindle box 25. The motor shaft of the spindle motor 251 drives the hydraulic three-jaw chuck 253 to rotate synchronously through a transmission belt 252. The rotation of the hydraulic three-jaw chuck 253 simultaneously drives the stirring head on the working tool holder 254 to rotate synchronously.

[0036] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0037] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A friction stir welding machine head assembly, characterized by, The head assembly comprises a fixed seat (21) provided with a driving shaft (24) in a horizontal direction, a main shaft box (25) fixed on the driving shaft (24) and swinging with the rotation of the driving shaft (24); the driving shaft (24) is coaxially provided with a driving worm wheel (241), the fixed seat (21) is provided with a driving worm (242) driven to rotate by a worm motor (243), and the driving worm (242) and the driving worm wheel (241) form a worm and gear cooperation.

2. A friction stir welding tool assembly according to claim 1, wherein A linear power source is arranged on the fixed seat (21), a clamping block (245) is arranged on the driving end of the linear power source, the linear travel track of the clamping block (245) intersects with the driving shaft (24), and a supporting seat (244) is further arranged on the fixed seat (21), the supporting seat (244) and the clamping block (245) are arranged on both sides of the driving shaft (24) respectively, and the clamping block (245) is clamped and stopped with the supporting seat (244) after cooperation.

3. A friction stir welding tool assembly according to claim 2, wherein The linear power source is a driving oil cylinder (246) arranged in a vertical direction, and the clamping block (245) is arranged at the linear extension end of the driving oil cylinder (246).

4. A friction stir welding tool assembly according to claim 2, wherein The contact surface between the supporting seat (244) and the driving shaft (24) is an arc surface corresponding to the diameter of the driving shaft (24), and the contact surface between the clamping block (245) and the driving shaft (24) is provided with a V-shaped groove.

5. A friction stir welding tool assembly according to any one of claims 1 to 4, wherein A power-off brake (247) is coaxially arranged on the outer circle of the driving shaft (24) on the fixed seat (21).

6. A friction stir welding tool assembly according to any one of claims 1 to 4, wherein A mounting groove (26) is vertically arranged on the fixed seat (21), the main shaft box (25) is fixed in the mounting groove (26), and the driving shaft (24) passes through the mounting groove (26) to fix the main shaft box (25).

7. A friction stir welding tool assembly according to claim 6, wherein A limiting block (27) is arranged at the opening of the mounting groove (26), and the pitching swing track of the main shaft box (25) intersects with the limiting block (27).

8. A friction stir welding tool assembly according to any one of claims 1 to 4, wherein A hydraulic three-jaw chuck (253) is arranged at the bottom of the main shaft box (25), the hydraulic three-jaw chuck (253) is driven to open and close to clamp a tool handle (254) by hydraulic power; a rotary oil cylinder (255) is coaxially arranged in the main shaft box (25) with the hydraulic three-jaw chuck (253), the rotary oil cylinder (255) provides hydraulic power for the hydraulic three-jaw chuck (253) through a hollow pull rod (256), and the hydraulic three-jaw chuck (253) is driven to rotate by a main shaft motor (251).

9. A friction stir welding machine head assembly according to claim 8, wherein, The main shaft motor (251) is arranged outside the main shaft box (25), and the motor shaft of the main shaft motor (251) drives the hydraulic three-jaw chuck (253) to rotate synchronously through a transmission belt (252).

10. A friction stir welding tool assembly according to any one of claims 1 to 4, wherein A Z-axis guide rail (22) is vertically arranged on the fixed seat (21), the fixed seat (21) is connected with a sliding seat (23) sliding in a horizontal direction through the Z-axis guide rail (22), and the fixed seat (21) is driven to produce lifting action along the Z-axis guide rail (22) by a lifting motor.

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