Automatic leveling pinch roller for friction stir welding

Abstract

The utility model relates to the technical field of friction stir welding in an aluminum connection process, and discloses an automatic leveling pinch roller for friction stir welding, which comprises a friction welding main shaft, wherein one end of the friction welding main shaft, which is far away from a shaft head, is detachably connected with a flange structure support; through cooperation of a flange structure support, a friction welding main shaft, a double-force air cylinder, a guide wheel support mechanism, a front guide pressing wheel, a rear pressing wheel and a locking pin shaft, the position of the guide wheel support mechanism is adjusted through the double-force air cylinder, then the front guide pressing wheel makes contact with a workpiece, and then the friction welding main shaft rotates to weld the workpiece; protrusions on workpieces can be conveniently pressed down in advance through the front guide pressing wheel and the rear pressing wheel, then the quality of the welding appearance surfaces of the workpieces is improved, height differences caused by welding are avoided, the operation cost of enterprises is saved, the productivity is improved, the working environment and safety are improved, and the production competitiveness of the enterprises is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding of aluminum connection technology, in particular to an automatic leveling and pressing wheel for friction stir welding. Background Art

[0002] Friction stir welding uses indirect friction heat to connect plates. This method breaks the original concept that friction welding is limited to the welding of circular cross-section materials. It is the latest welding technology for aluminum and its alloys. Friction stir welding technology can replace traditional fusion welding, resistance welding, and riveting welding technology to a certain extent. It is particularly suitable for the welding of long and large components. Friction stir welding technology has shown obvious advantages in aluminum alloy welding and has been widely promoted in aviation, rail and other industrial fields.

[0003] The friction stir welding method is the same as conventional friction welding, which also uses friction heat and plastic deformation heat as welding heat sources. The difference is that the friction stir welding process is that a cylindrical or other shaped stirring head is inserted into the joint of the workpiece, and the stirring head rotates at high speed to make it rub against the welding workpiece material, thereby raising the temperature of the material at the connection part and softening it, and at the same time stirring and rubbing the material to complete the welding;

[0004] At present, in the production process of aluminum connection process, stir friction welding, the workpiece matching and the tooling fixture cannot be fully clamped, resulting in welding defects and scrapping of the workpiece bulge in the forward direction of stir friction welding. Manpower is required for repair after welding, resulting in high labor costs and related equipment investment. The appearance of manual repair cannot meet the quality delivery requirements, and there are safety risks in manual operation. Therefore, we need to propose an automatic leveling clamping wheel for stir friction welding. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic leveling and clamping wheel for stir friction welding, which effectively solves the problem of height difference and poor clamping between the matching surface of the stir friction welding spindle and the workpiece in aluminum connection, improves the surface quality of the welding appearance, saves enterprise operating costs, and improves productivity, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic leveling pressure wheel for stir friction welding, comprising a friction welding main shaft: an end of the friction welding main shaft away from the shaft head is detachably connected to a flange structure support, one end of the lower surface of the flange structure support is provided with a double-force cylinder, the telescopic end of the double-force cylinder is fixedly connected to a guide wheel bracket mechanism, one end of the upper surface of the guide wheel bracket mechanism is provided with a through hole for the friction welding main shaft to pass through, one end of the upper surface of the guide wheel bracket mechanism is provided with a mounting hole, and a front guide pressure wheel and a rear pressure wheel are arranged inside the mounting hole, and a locking pin shaft for rotatably connecting the front guide pressure wheel and the rear press wheel is inserted on one side of the guide wheel bracket mechanism, and the front guide pressure wheel and the rear pressure wheel are both arranged in the same plane.

[0007] Preferably, the lower end of the front guide clamping wheel is arranged 0.2 mm below the lower end of the stirring shaft head of the friction welding main shaft, and the front guide clamping wheel and the stirring shaft head of the friction welding main shaft are staggered.

[0008] Preferably, two groups of connecting upper guide bolts are inserted into one end of the upper surface of the flange structure support, and the lower ends of the two groups of connecting upper guide bolts pass through the flange structure support and are respectively threadedly connected to the upper guide column mechanism.

[0009] Preferably, two groups of lower guide locking bolts are inserted into one end of the lower surface of the guide wheel bracket mechanism, and the upper ends of the two groups of lower guide locking bolts pass through the guide wheel bracket mechanism and are respectively threadedly connected to the lower guide column mechanism.

[0010] Preferably, the upper ends of the two groups of upper guide column mechanisms are provided with upper screw holes for threaded connection of upper guide bolts, and the lower ends of the two groups of lower guide column mechanisms are provided with lower screw holes for threaded connection of lower guide locking bolts.

[0011] Preferably, the lower ends of the two groups of upper guide column mechanisms are respectively provided with sliding holes for the two groups of lower guide column mechanisms to slide and plug in, the axes of the two groups of upper guide column mechanisms are respectively arranged on the same straight line with the axes of the two groups of lower guide column mechanisms, and limiting rings are arranged on the outer sides of the lower ends of the two groups of lower guide column mechanisms.

[0012] Preferably, the guide wheel bracket mechanism is arranged in a convex shape, and an end of the lower surface of the guide wheel bracket mechanism close to the front guide clamping wheel is lower than an end of the lower surface of the guide wheel bracket mechanism close to the lower guide locking bolt.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model mainly cooperates between a flange structure support, a friction welding spindle, a double-force cylinder, a guide wheel bracket mechanism, a front guide clamping wheel, a rear clamping wheel and a locking pin shaft, and adjusts the position of the guide wheel bracket mechanism through the double-force cylinder, so that the front guide clamping wheel contacts the workpiece, and then welds the workpiece through the rotation of the friction welding spindle. The front guide clamping wheel and the rear clamping wheel are used to pre-press the protrusions on the workpiece, thereby improving the quality of the workpiece welding appearance surface, avoiding height differences caused by welding, saving enterprise operating costs, increasing productivity, improving the working environment and safety, and further contributing to improving the enterprise's production competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the flange structure support structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the guide wheel bracket mechanism of the utility model.

[0018] In the figure: 1. Flange structure support; 2. Connecting upper guide bolt; 3. Upper guide column mechanism; 4. Lower guide column mechanism; 41. Limiting ring; 5. Lower guide locking bolt; 6. Guide wheel bracket mechanism; 7. Double force cylinder; 8. Rear clamping wheel; 9. Front guide clamping wheel; 10. Locking pin shaft; 11. Friction welding spindle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: an automatic leveling pressure wheel for stir friction welding, comprising a friction welding spindle 11: an end of the friction welding spindle 11 away from the shaft head is detachably connected to a flange structure support 1, one end of the lower surface of the flange structure support 1 is provided with a double-force cylinder 7, the telescopic end of the double-force cylinder 7 is fixedly connected to a guide wheel bracket mechanism 6, one end of the upper surface of the guide wheel bracket mechanism 6 is provided with a through hole for the friction welding spindle 11 to pass through, one end of the upper surface of the guide wheel bracket mechanism 6 is provided with a mounting hole, and a front guide pressure wheel 9 and a rear pressure wheel 8 are arranged inside the mounting hole, and a locking pin shaft 10 for rotatably connecting the front guide pressure wheel 9 and the rear press wheel is inserted at one side of the guide wheel bracket mechanism 6, and the front guide pressure wheel 9 and the rear pressure wheel 8 are both arranged in the same plane.

[0021] The lower end of the front guide clamping wheel 9 is arranged at 0.2 mm below the lower end of the stirring shaft head of the friction welding main shaft 11, and the front guide clamping wheel 9 and the stirring shaft head of the friction welding main shaft 11 are staggered. By making the front guide clamping wheel 9 lower than the stirring shaft head of the friction welding main shaft 11, the front guide clamping wheel 9 can pre-press the edge of the workpiece weld, thereby improving the quality of stirring welding of the friction welding main shaft 11.

[0022] Two sets of connecting upper guide bolts 2 are inserted at one end of the upper surface of the flange structure support 1, and the lower ends of the two sets of connecting upper guide bolts 2 pass through the flange structure support 1 and are respectively threadedly connected with the upper guide column mechanism 3. By connecting the upper guide bolts 2, it is convenient to quickly position the upper guide column mechanism 3, so as to improve the stability of the lifting and lowering of the guide wheel bracket mechanism 6.

[0023] Two groups of lower guide locking bolts 5 are inserted into one end of the lower surface of the guide wheel bracket mechanism 6, and the upper ends of the two groups of lower guide locking bolts 5 pass through the guide wheel bracket mechanism 6 and are respectively threadedly connected to the lower guide column mechanism 4. The lower guide locking bolts 5 facilitate rapid installation and positioning of the lower guide column mechanism 4, thereby improving the stability of the lower guide column mechanism 4 after fixation.

[0024] The upper ends of the two groups of upper guide column mechanisms 3 are provided with upper screw holes for threaded connection of the upper guide bolts 2, and the lower ends of the two groups of lower guide column mechanisms 4 are provided with lower screw holes for threaded connection of the lower guide locking bolts 5. The upper guide column mechanisms 3 and the lower guide column mechanisms 4 are easy to disassemble and assemble, and have a simple structure, which reduces the production cost of the structure and facilitates maintenance and replacement.

[0025] The lower ends of the two groups of upper guide column mechanisms 3 are respectively provided with sliding holes for the two groups of lower guide column mechanisms 4 to slide and plug in. The axes of the two groups of upper guide column mechanisms 3 are respectively arranged on the same straight line with the axes of the two groups of lower guide column mechanisms 4. Limiting rings 41 are arranged on the outer sides of the lower ends of the two groups of lower guide column mechanisms 4. The limiting rings 41 facilitate the insertion of the lower guide column mechanisms 4 into the upper surface of the guide wheel bracket mechanism 6. At the same time, the upper guide column mechanisms 3 and the lower guide column mechanisms 4 are slidably plugged in, thereby improving the stability of the lifting and lowering of the guide wheel bracket mechanism 6.

[0026] The guide wheel bracket mechanism 6 is arranged in a convex shape, and an end of the lower surface of the guide wheel bracket mechanism 6 close to the front guide clamping wheel 9 is lower than an end of the lower surface of the guide wheel bracket mechanism 6 close to the lower guide locking bolt 5. The guide wheel bracket mechanism 6 makes the lowest end of the front guide clamping wheel 9 lower than the telescopic end of the double-force cylinder 7, thereby preventing the telescopic end of the double-force cylinder 7 from scratching the weld after welding, thereby improving the appearance quality of the welding.

[0027] When in use, the automatic leveling clamping wheel tool is a matching tool, which is installed on the main shaft flange position of the stirring equipment. The clamping output force can be adjusted at any time by automatically adjusting the up and down stroke of the double-force cylinder 7 according to the workpiece matching requirements. The front guide clamping wheel 9 and the rear clamping wheel 8 clamp the edge of the workpiece weld in advance in the welding forward direction. The front guide clamping wheel 9 and the rear clamping wheel 8 are arranged on a parallel surface with the shoulder surface of the stirring shaft head of the friction welding main shaft 11 and are pressed down by 0.2mm, which facilitates the subsequent synchronous stirring welding of the stirring shaft head of the friction welding main shaft 11, further improving the welding quality of the appearance surface of the workpiece weld and improving work efficiency.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A friction stir welding automatic leveling pinch wheel, characterized in that: It comprises a friction welding spindle (11): the end of the friction welding spindle (11) away from the shaft head is detachably connected to a flange structure support (1), one end of the lower surface of the flange structure support (1) is provided with a double-force cylinder (7), the telescopic end of the double-force cylinder (7) is fixedly connected to a guide wheel bracket mechanism (6), one end of the upper surface of the guide wheel bracket mechanism (6) is provided with a through hole for the friction welding spindle (11) to pass through, one end of the upper surface of the guide wheel bracket mechanism (6) is provided with a mounting hole, and a front guide clamping wheel (9) and a rear clamping wheel (8) are arranged inside the mounting hole, one side of the guide wheel bracket mechanism (6) is plugged with a locking pin shaft (10) for rotatably connecting the front guide clamping wheel (9) and the rear clamping wheel, and the front guide clamping wheel (9) and the rear clamping wheel (8) are both arranged in the same plane.

2. The automatic leveling pinch wheel for friction stir welding according to claim 1, characterized in that: The lower end of the front guide clamping wheel (9) is arranged 0.2 mm below the stirring shaft head of the friction welding main shaft (11), and the front guide clamping wheel (9) and the stirring shaft head of the friction welding main shaft (11) are arranged in an offset manner.

3. The automatic leveling pinch wheel for friction stir welding according to claim 2, characterized in that: Two groups of connecting upper guide bolts (2) are inserted into one end of the upper surface of the flange structure support (1), and the lower ends of the two groups of connecting upper guide bolts (2) penetrate the flange structure support (1) and are respectively threadedly connected to the upper guide column mechanism (3).

4. The automatic leveling pinch wheel for friction stir welding according to claim 3, characterized in that: Two groups of lower guide locking bolts (5) are inserted into one end of the lower surface of the guide wheel bracket mechanism (6), and the upper ends of the two groups of lower guide locking bolts (5) penetrate the guide wheel bracket mechanism (6) and are respectively threadedly connected to the lower guide column mechanism (4).

5. The automatic leveling pinch wheel for friction stir welding according to claim 4, characterized in that: The upper ends of the two groups of upper guide column mechanisms (3) are provided with upper screw holes for threaded connection with the upper guide bolts (2), and the lower ends of the two groups of lower guide column mechanisms (4) are provided with lower screw holes for threaded connection with the lower guide locking bolts (5).

6. The automatic leveling pinch wheel for friction stir welding according to claim 5, characterized in that: The lower ends of the two groups of upper guide column mechanisms (3) are respectively provided with sliding holes for the two groups of lower guide column mechanisms (4) to slide and plug in. The axes of the two groups of upper guide column mechanisms (3) are respectively arranged on the same straight line as the axes of the two groups of lower guide column mechanisms (4). The outer sides of the lower ends of the two groups of lower guide column mechanisms (4) are respectively provided with limit rings (41).

7. The automatic leveling pinch wheel for friction stir welding according to claim 6, characterized in that: The guide wheel bracket mechanism (6) is arranged in a convex shape, and an end of the lower surface of the guide wheel bracket mechanism (6) close to the front guide clamping wheel (9) is lower than an end of the lower surface of the guide wheel bracket mechanism (6) close to the lower guide locking bolt (5).

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