Positioning base for friction stir welding

Abstract

The invention discloses a positioning base for friction stir welding, and relates to the technical field of equipment bases, the positioning base comprises a base body, a plurality of adsorption devices and a plurality of pressing devices; a positioning space is formed in one side of the seat body, and a plurality of positioning pieces and a plurality of positioning openings are formed in one side of the seat body; the adsorption device comprises a base and a first pneumatic control piece; the pressing device comprises a base table, a pressing piece and a first driving piece. One end of the pressing piece is rotationally connected with the base table, and when the pressing piece rotates to a limiting position close to the corresponding base, the pressing piece and the corresponding base can clamp and position the to-be-welded structure; the first driving piece is arranged on the base table and can drive the pressing piece to rotate relative to the base table. The position precision and the position stability of positioning of the to-be-welded structure can be effectively improved, and therefore the final welding effect of the to-be-welded structure can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment bases, and in particular to a positioning base for friction stir welding. Background Art

[0002] Friction stir welding is an efficient and high-quality welding technology. Its welding principle is to use the heat generated by the friction between the high-speed rotating welding tool (stirring head) and the workpiece to locally plasticize the material to be welded. When the welding tool moves forward along the welding interface, the plasticized material flows from the front to the back of the welding tool under the action of the rotating friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] Existing friction stir welding equipment is usually equipped with a positioning base for operation. After the positioning base positions the structure to be welded, the friction stir welding equipment welds the structure to be welded. The friction stir welding equipment and the positioning base can work together to achieve automated and refined welding of the structure to be welded, thereby effectively improving the welding effect and efficiency.

[0004] However, the welding effect of the friction stir welding equipment and the positioning base will be mainly affected by the positioning effect of the structure to be welded on the positioning base. If there is a deviation in the position of the structure to be welded on the positioning base or the position stability is insufficient, the final welding effect will be greatly reduced. Summary of the invention

[0005] The present application provides a positioning base for friction stir welding, which can effectively improve the position accuracy and position stability of the structure to be welded, thereby effectively improving the final welding effect of the structure to be welded.

[0006] The present application provides a positioning base for friction stir welding, which adopts the following technical solution: A positioning base for friction stir welding, comprising a base body, a plurality of adsorption devices and a plurality of pressing devices; One side of the seat body has a positioning space for positioning the structure to be welded, and the side of the seat body close to the positioning space has a plurality of positioning members adapted to the structure to be welded, and the side of the seat body close to the positioning space also has a plurality of positioning openings adapted to the structure to be welded; The adsorption device includes a base and a first air control component; the base is arranged on a side of the base body close to the positioning space, and the first air control component is arranged on the base body and connected to the base; the base has a cavity inside, and two ends of the cavity are respectively connected to the positioning space and the first air control component; The number of the pressing devices is not more than the number of the adsorption devices, and the pressing devices are matched with the adjacent adsorption devices, and the pressing devices are located on one side of the corresponding adsorption device; The clamping device includes a base, a clamping member and a first driving member; the base is arranged on a side of the base body close to the positioning space; one end of the clamping member is rotatably connected to the base, and when the clamping member rotates to the extreme position toward the corresponding base, the end of the clamping member away from the base is located on the side of the corresponding base close to the positioning space, and can clamp and position the structure to be welded with the corresponding base; the first driving member is arranged on the base, and can drive the clamping member to rotate relative to the base.

[0007] By adopting the above technical scheme, when the structure to be welded is placed on one side of the base body close to the positioning space, multiple positioning members and multiple positioning ports can be used as references to improve the positioning accuracy of the structure to be welded after placement; after the structure to be welded is placed, multiple adsorption devices apply suction to it and multiple clamping devices apply pressure to it, so that the structure to be welded is firmly clamped and positioned, effectively improving its position stability after positioning, thereby effectively improving the final welding effect of the structure to be welded.

[0008] Optionally, it further comprises a plurality of adjusting devices, wherein the plurality of adjusting devices correspond one-to-one to the plurality of pressing members, and the adjusting devices are arranged at one end of the corresponding pressing member away from the base; The adjusting device comprises a plurality of rotating rollers and a second driving member; the rotating rollers can rotate relative to the corresponding pressing members, and the second driving member can drive the rotating rollers to rotate; When the pressing member and the corresponding base clamp the structure to be welded and position it, the rotating roller contacts and abuts against the structure to be welded, and at this time, the rotation of the rotating roller can drive the structure to be welded to move within the plane where it is located.

[0009] By adopting the above technical solution, when the position accuracy of the structure to be welded is insufficient after being placed on one side of the seat body close to the positioning space, the structure to be welded can be controlled to move and adjust its position through multiple adjustment devices, thereby facilitating the structure to be welded to adjust its own position accuracy.

[0010] Optionally, it further comprises a plurality of visual sensors, wherein the plurality of visual sensors correspond to the plurality of pressing members one by one, and the visual sensors are arranged on the corresponding pressing members; The visual sensor is connected to the corresponding second driving member signal; when the clamping member and the corresponding base clamp the structure to be welded and position it, the corresponding visual sensor can measure the distance between it and the adjacent part of the structure to be welded.

[0011] By adopting the above technical solution, the visual sensor can determine the position accuracy of the structure to be welded after placement by measuring the distance, and control the adjustment device according to the position accuracy of the structure to be welded at this time, thereby improving the reliability of the structure to be welded to maintain a high position accuracy.

[0012] Optionally, it further includes a plurality of retractable protective members, wherein the plurality of protective members correspond one-to-one to the plurality of visual sensors, and the protective members are arranged on the corresponding pressing members and are located on a side of the corresponding visual sensor away from the corresponding base.

[0013] By adopting the above technical solution, when the protective part contracts, the visual sensor can effectively measure the placement position of the structure to be welded; when the protective part extends, the protective part can reduce the impact of high temperature during welding on the visual sensor and extend the service life of the visual sensor.

[0014] Optionally, the adjustment device further includes a movable seat; The plurality of rotating rollers and the second driving member are all disposed on the movable seat, and the movable seat is movably connected to the corresponding pressing member; When the clamping member and the corresponding base clamp the structure to be welded and position it, the movable direction of the movable seat is perpendicular to the plane where the structure to be welded is located.

[0015] By adopting the above technical solution, the activity of the movable seat can be controlled to control whether the adjustment device has a position adjustment effect on the structure to be welded, thereby reducing the probability that the adjustment device is mistakenly triggered after the structure to be welded is positioned, causing the structure to be welded to move and affecting the welding effect.

[0016] Optionally, the regulating device further comprises an air bag and a second air control unit; The airbag is arranged inside the corresponding pressing member, and two ends of the airbag are respectively connected to the movable seat and the pressing member; The second air control part is arranged on the corresponding pressing part, the second air control part is communicated with the interior of the airbag, and can control the expansion and contraction of the airbag to drive the movable seat to move.

[0017] By adopting the above technical solution, the movement of the movable seat can be controlled by controlling the expansion and contraction of the airbag, so that the use of the adjustment device can be more convenient and quick, and at the same time, the damage to the structure to be welded caused by the rotating roller contacting and abutting against the structure to be welded can be effectively reduced.

[0018] Optionally, the protective member is extended and retracted by the inflow and outflow of gas, the second gas control unit is connected to the corresponding protective member, and when the protective member is inflated and extended, the corresponding airbag shrinks until the corresponding rotating roller is located in the clamping member.

[0019] By adopting the above technical solution, the visual sensor and the corresponding adjustment device can be coordinated so that the two can perform their respective functions at the appropriate time, thereby reducing the probability of errors when they are independently controlled.

[0020] Optionally, the airbag is elastic, and one end of the pressing member away from the corresponding base has a movable space for the movable seat to move, and a clearance space is provided for the airbag to deform; When the airbag expands, the corresponding movable seat has a tendency to move to make the rotating roller located outside the movable space.

[0021] By adopting the above technical solution, the airbag can be deformed by force when the rotating roller contacts the structure to be welded, and the service life of the airbag can be effectively extended. In addition, the effect of the adjustment device in moving and adjusting the structure to be welded can be improved, and the probability of the structure to be welded slipping with the rotating roller when the rotating roller rotates can be reduced.

[0022] Optionally, the rotation axis of the rotating roller is parallel to the rotation axis of the corresponding pressing member.

[0023] By adopting the above technical solution, the movement adjustment direction of the adjustment device on the structure to be welded can be limited by the corresponding clamping device, and at the same time, the corresponding visual sensor can be conveniently used to measure the position of the structure to be welded, thereby improving the measurement accuracy of the visual sensor.

[0024] Optionally, the surface of the rotating roller is covered with an elastic contact layer, and the surface of the contact layer is provided with anti-slip textures.

[0025] By adopting the above technical solution, the probability of the rotating roller causing damage to the structure to be welded when it contacts the structure to be welded can be further reduced, and the effect of the adjustment device on moving and adjusting the structure to be welded can be further improved.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. It can effectively improve the positioning accuracy and position stability of the structure to be welded, thereby effectively improving the final welding effect of the structure to be welded; 2. After the structure to be welded is placed, the placement position of the structure to be welded can be measured in an intelligent and automated manner, and the structure to be welded can be moved according to the measurement results, so that it can be positioned with high position accuracy; 3. It can effectively reduce the probability of damage to the structure to be welded during the process of driving the structure to be welded to move its position, and at the same time can effectively improve the reliability of the structure to be welded with high position accuracy after the structure to be welded is moved; 4. It can ensure the stability of measuring the placement position of the structure to be welded, and can effectively reduce the impact of high temperature generated during welding on the visual sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a positioning base for friction stir welding in Example 1; Figure 2 It is a partial structural schematic diagram of a positioning base for friction stir welding in Example 1; Figure 3 It is a partial cross-sectional view of the adsorption device and the pressing device in Example 1 when the structure to be welded is positioned together; Figure 4 It is a partial structural schematic diagram of a positioning base for friction stir welding in Example 2; Figure 5 It is a partial cross-sectional view after the adsorption device and the pressing device in Example 2 work together to position the structure to be welded; Figure 6 is a partial cross-sectional view of the visual sensor and the adjusting device in Example 2 when the position of the structure to be welded is adjusted together; Figure 7 It is a schematic diagram of the positional relationship between the protective component in Example 2 and the corresponding visual sensor when the protective component as a whole undergoes thermal expansion and contraction.

[0028] Explanation of the reference numerals: 1. seat body; 11. positioning member; 12. positioning port; 2. adsorption device; 21. base; 211. cavity; 22. first air control unit; 221. air nozzle; 3. clamping device; 31. base; 32. clamping member; 321. movable space; 322. clearance space; 33. first driving member; 4. positioning space; 5. adjusting device; 51. movable seat; 52. rotating roller; 521. contact layer; 53. second driving member; 54. airbag; 55. second air control unit; 6. visual sensor; 7. protective member. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-7 This application is described in further detail.

[0030] Embodiment 1: The embodiment of the present application discloses a positioning base for friction stir welding, which is used in conjunction with a friction stir welding device to perform friction stir welding on a structure to be welded that is positioned on the positioning base.

[0031] Reference Figure 1 and Figure 2The positioning base includes a base body 1, a plurality of adsorption devices 2 and a plurality of pressing devices 3. The base body 1 is used for positioning the structure to be welded after being placed on it, and at the same time serves as a mounting carrier for the plurality of adsorption devices 2 and the plurality of pressing devices 3; the adsorption device 2 is used to adsorb the structure to be welded placed on the base body 1 to position it; and the pressing device 3 is used to apply pressure to the structure to be welded placed on the base body 1 to position it.

[0032] The seat body 1 is a rectangular parallelepiped structure as a whole, and is composed of a rectangular plate and a plurality of supporting legs. It is fixed on the ground with the plurality of supporting legs as supporting points, and at this time, the surface of the top thereof is horizontal.

[0033] The top of the base 1 has a positioning space 4, and the structure to be welded will be positioned after being placed on the side of the base 1 close to the positioning space 4 (i.e., the top of the base 1). The top of the base 1 has a plurality of positioning members 11 for assisting the structure to be welded to determine the placement position in the positioning space 4, and is provided with a plurality of positioning openings 12 for assisting the structure to be welded to determine the placement position in the positioning space 4. In this embodiment, the positioning member 11 is preferably a rectangular plate-shaped structure, and the side of the positioning member 11 facing away from the base 1 is used to contact and abut against the structure to be welded. The distribution pattern of the plurality of positioning members 11 on the base 1 is adapted to the shape of the characteristic part of the structure to be welded, and the end faces of the plurality of positioning members 11 facing away from the base 1 are flush; the positioning opening 12 preferably passes through the rectangular plate of the base 1 for the protruding part of the structure to be welded to be inserted, and the size of the positioning opening 12 is larger than the size of the protruding part of the structure to be welded.

[0034] When placing the structure to be welded in the positioning space 4, it is only necessary to make the characteristic part of the structure to be welded contact and abut against the multiple positioning parts 11 with the assistance of multiple positioning parts 11, so that the raised part of the structure to be welded can be inserted into the corresponding positioning port 12; or the raised part of the structure to be welded can be inserted into the corresponding positioning port 12 with the assistance of multiple positioning ports 12, so that the characteristic part of the structure to be welded can be contacted and abutted against the multiple positioning parts 11.

[0035] Multiple adsorption devices 2 are evenly distributed on the base 1 relative to the position of the structure to be welded after it is placed in the positioning space 4. When the structure to be welded is placed, multiple adsorption devices 2 can all be located below the structure to be welded, ready to be adsorbed and positioned.

[0036] Reference Figure 2 and Figure 3 The adsorption device 2 includes a base 21 and a first gas control unit 22. The surface of the base 21 is used to fit against the surface of the structure to be welded to improve the adsorption effect; the first gas control unit 22 is used to control the gas flow and apply adsorption force to the structure to be welded.

[0037] The base 21 is fixedly installed on the side of the base 1 close to the positioning space 4, and the surface of the base 21 facing away from the base 1 is flush with the surface of the positioning member 11 facing away from the base 1; the base 21 has a cavity 211 running through both sides of itself. After the base 21 is installed on the base 1, the direction in which the cavity 211 runs through the base 21 is perpendicular to the surface of the top of the base 1. In this embodiment, the base 1 is preferably provided with a groove for positioning and installing the base 21 on the surface of the rectangular plate of the base 1 close to the positioning space 4, and the shape of the bottom of the base 21 is adapted to the groove; and the shape of the cavity 211 is preferably cylindrical. After the base 21 is installed on the base 1, the axis of the cavity 211 is perpendicular to the surface of the top of the base 1.

[0038] The first gas control 22 is fixedly mounted on the seat body 1 and is located on the side of the base 21 away from the positioning space 4; the first gas control 22 has a gas nozzle 221 with a shape matching the cavity 211 extending outward from one end close to the base 21, and the gas nozzle 221 extends into the cavity 211 and seals one end of the cavity 211; the first gas control 22 is connected to the cavity 211 through the gas nozzle 221, and can drive the gas in the cavity 211 to exchange with the gas outside. In this embodiment, it is preferred that the first gas control 22 is fixedly mounted on the side of the rectangular plate of the seat body 1 away from the positioning space 4, and the seat body 1 is also provided with a groove for the installation of the first gas control 22 on the surface of the rectangular plate of the seat body 1 on the side away from the positioning space 4, the shape of the end of the first gas control 22 is matched with the groove, and the seat body 1 also has a through hole between the two corresponding grooves for the gas nozzle 221 to pass through; since the first gas control 22 with the above-mentioned function is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0039] After the structure to be welded is placed in the positioning space 4 and fits against the surface of the base 21, the first gas control unit 22 is controlled to drive the gas in the cavity 211 to leave the cavity 211, so that a pressure difference is formed on both sides of the structure to be welded, driving the structure to be welded to keep fitting against the base 21, thereby achieving adsorption positioning; when the welded structure needs to be removed, the first gas control unit 22 is controlled to drive the gas into the cavity 211, so that the air pressure on both sides of the welded structure is balanced, and the adsorption positioning of the welded structure can be released, making it convenient for the staff to remove the welded structure.

[0040] Reference Figure 1 and Figure 2, multiple clamping devices 3 are distributed on the base body 1 according to the distribution law of multiple adsorption devices 2, and the number of clamping devices 3 installed on the base body 1 is not more than the number of adsorption devices 2; when the structure to be welded is placed, multiple clamping devices 3 can be located on the outside of the structure to be welded or in the hollow area of ​​the structure to be welded, ready to be clamped and positioned. In this embodiment, it is preferred that the number of clamping devices 3 installed on the base body 1 is less than the number of adsorption devices 2, and the clamping devices 3 are installed adjacent to the adsorption devices 2 and correspond one to one with the adjacent adsorption devices 2; and in order to facilitate the distinction between adsorption devices 2 with or without clamping devices 3, it is preferred that the base 21 of the adsorption device 2 without clamping devices 3 corresponding to it is a rectangular parallelepiped structure, and the base 21 of the adsorption device 2 with clamping devices 3 corresponding to it is a cylindrical structure.

[0041] Reference Figure 2 and Figure 3 The clamping device 3 includes a base 31, a clamping member 32 and a first driving member 33. The base 31 can contact with the structure to be welded to provide support for it; the clamping member 32 can apply pressure to the structure to be welded and clamp the structure to be welded in cooperation with the base 31; the first driving member 33 is used to provide energy for the operation of the clamping device 3.

[0042] The base 31 is fixedly mounted on one side of the base 1 close to the positioning space 4 and is located on one side of the corresponding base 21. In this embodiment, it is preferred that different bases 31 are respectively located on one side of the corresponding base 21 along the length direction of the base 1, or on one side of the corresponding base 21 along the width direction of the base 1.

[0043] The clamping member 32 is installed on the top of the base 31, and one end of its length direction is rotatably connected to the corresponding base 31, and its rotation axis is horizontal and perpendicular to the line between it and the corresponding base 21; the other end of its length direction has a cylindrical structure that matches the shape of the corresponding base 21.

[0044] The clamping piece 32 is limited in its rotation relative to the base 31. When the clamping piece 32 rotates to the extreme position toward the corresponding base 21, the length direction of the clamping piece 32 is parallel to the line between the base 31 and the corresponding base 21, and the end of the clamping piece 32 away from the corresponding base 31 is located above the corresponding base 21, the axis of the cylindrical structure at the end of the clamping piece 32 coincides with the axis of the cylindrical structure of the corresponding base 21, and a space with a spacing equal to the thickness of the structure to be welded is formed between the two, and the structure to be welded can be clamped and positioned between the clamping piece 32 and the corresponding base 21; when the clamping piece 32 rotates to the extreme position away from the corresponding base 21, the length direction of the clamping piece 32 is perpendicular to the surface of the top of the base 1, which is convenient for the staff to place the structure to be welded on the base 1 or remove the welded structure.

[0045] The first driving member 33 is fixedly mounted on the base 31, and can drive the pressing member 32 to rotate relative to the base 31. In this embodiment, the first driving member 33 is preferably a servo motor; since the servo motor is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0046] After the structure to be welded is placed on the base 1 and needs to be positioned, multiple adsorption devices 2 will adsorb and position the structure to be welded, and multiple clamping devices 3 will clamp and position the structure to be welded at the same time, which can effectively ensure the position stability of the structure to be welded and facilitate the subsequent welding of the structure to be welded by stir friction welding equipment.

[0047] The implementation principle of a positioning base for friction stir welding in the embodiment of the present application is: After the positions and shapes of the multiple positioning members 11 and the multiple positioning openings 12 on the top of the base body 1 are adaptively adjusted and designed according to the structure to be welded, the structure to be welded is placed on the base body 1 with the multiple positioning members 11 and the multiple positioning openings 12 as reference objects; Then, the plurality of adsorption devices 2 and the plurality of clamping devices 3 are started, and the plurality of first gas control components 22 are controlled to drive the gas in the plurality of cavities 211 to leave, so that the structure to be welded is adsorbed and positioned above the plurality of bases 21 under the action of the gas pressure difference; at the same time, the plurality of first driving components 33 are controlled to drive the plurality of clamping components 32 to rotate to the extreme position in the direction close to the corresponding base 21, so that the clamping components 32 can contact and abut against the structure to be welded and apply pressure thereto, so that the structure to be welded is clamped and positioned between the clamping components 32 and the corresponding base 21, thereby realizing the clamping and positioning of the structure to be welded; Then, the friction stir welding equipment performs welding operation on the structure to be welded. After the welding is completed, the multiple clamping devices 3 and the multiple adsorption devices 2 are controlled in turn, so that the clamping positioning of the welded structure by the multiple clamping devices 3 and the adsorption positioning of the welded structure by the multiple adsorption devices 2 can be contacted in turn, and the welded structure can be removed smoothly.

[0048] Embodiment 2: Reference Figure 2 and Figure 4 The difference between this embodiment and embodiment 1 lies in the clamping device 3 , and it also includes multiple adjustment devices 5 , multiple visual sensors 6 and multiple protective members 7 .

[0049] Reference Figure 4 and Figure 5 The adjusting device 5 is installed at one end of the pressing member 32 away from the corresponding base 31, and a plurality of adjusting devices 5 correspond to a plurality of pressing members 32 one by one.

[0050] Reference Figure 5 and Figure 6The adjusting device 5 includes a movable seat 51, a plurality of rotating rollers 52, a second driving member 53, an airbag 54 and a second air control member 55. The movable seat 51 is used as a mounting carrier for the rotating rollers 52 and the second driving member 53, and is used to drive the rotating rollers 52 to move; the rotating rollers 52 are used to drive the structure to be welded to move, and adjust the position of the structure to be welded after placement, so as to improve the final placement and positioning accuracy; the second driving member 53 provides power for the rotating rollers 52; the airbag 54 is used to provide the movable seat 51 with a certain amount of movement margin; the second air control member 55 is used to control the expansion and contraction of the airbag 54, and can thereby control the movement of the movable seat 51.

[0051] The movable seat 51 is generally cylindrical in structure, and an active space 321 adapted to the movable seat 51 is provided at one end of the clamping piece 32 away from the corresponding base 31. The shape of the active space 321 is also cylindrical, and the axis of the active space 321 coincides with the axis of the cylindrical structure at the end of the clamping piece 32, and the active space 321 passes through one side of the clamping piece 32 along its own axial direction; when the clamping piece 32 rotates to the extreme position in the direction close to the corresponding base 21, the active space 321 is connected to the space between the clamping piece 32 and the corresponding base 21 through its own opening; the movable seat 51 is movably connected to the clamping piece 32, and its movable direction is parallel to its own axial direction.

[0052] The airbag 54 is installed in the movable space 321 and is located on a side of the movable seat 51 close to the inner wall of the movable space 321 away from its own opening. One end of the airbag 54 is fixedly connected to the inner wall of the movable space 321 away from its own opening, and the other end is fixedly connected to the movable seat 51.

[0053] The second gas control 55 is fixedly mounted on one end of the pressing member 32 away from the corresponding base 31 and is located on the side of the pressing member 32 away from the activity space 321; the second gas control 55 extends outward with a gas pipe fixedly connected to the airbag 54 and communicates with the internal space of the airbag 54, and can control the expansion or contraction of the airbag 54 by controlling the gas to enter and exit the internal space of the airbag 54; during the process of the second gas control 55 controlling the expansion and contraction of the airbag 54, the movable seat 51 can move in the activity space 321 accordingly. In this embodiment, since the second gas control 55 with the above functions is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0054] The rotating roller 52 is a cylindrical structure as a whole, and is rotatably mounted on one end of the movable seat 51 away from the corresponding airbag 54. The rotation axis of the rotating roller 52 coincides with its own axis and is parallel to the rotation axis of the corresponding pressing member 32, and the rotating roller 52 is partially located inside the movable seat 51 and partially located outside the movable seat 51. In this embodiment, the adjustment device 5 preferably includes a rotating roller 52; and the part of the rotating roller 52 located outside the movable seat 51 is preferably used to contact the structure to be welded, and the friction between itself and the structure to be welded makes the rotating roller 52 rotate to drive the structure to be welded to move.

[0055] The second driving member 53 is fixedly installed inside the movable seat 51 and is located on the side of the rotating roller 52 close to the airbag 54; the second driving member 53 is connected to the rotating roller 52 through a transmission structure (such as a gear set structure) inside the movable seat 51, and can drive the rotating roller 52 to rotate relative to the movable seat 51. In this embodiment, the second driving member 53 is preferably a servo motor; since the servo motor and the above-mentioned transmission structure are both common existing technologies, they are not described here in detail. The second driving member 53 is only briefly shown in the drawings and the above-mentioned transmission structure is omitted.

[0056] The movable seat 51 is limited in its movement in the movable space 321. When the airbag 54 expands to an extreme state, that is, the movable seat 51 moves to an extreme position in a direction away from the airbag 54, the end surface of the movable seat 51 close to the rotating roller 52 will be flush with the end surface of the pressing member 32 close to the opening of the movable space 321, and the part of the rotating roller 52 outside the movable seat 51 will also be outside the movable space 321; when the airbag 54 shrinks to an extreme state, that is, the movable seat 51 moves to an extreme position in a direction close to the airbag 54, the movable seat 51 and the rotating roller 52 are both located in the movable space 321.

[0057] During the process of the clamping piece 32 rotating to the extreme position in the direction close to the corresponding base 21 to apply pressure to the structure to be welded, if the movable seat 51 is in a state of moving to the extreme position in the direction away from the airbag 54, the rotating roller 52 will drive the movable seat 51 to move and squeeze the airbag 54 after contacting the structure to be welded as the clamping piece 32 rotates, and finally the end of the rotating roller 52 located outside the movable seat 51 is flush with the end face of the clamping piece 32 close to the opening of the active space 321, which can greatly increase the friction between the rotating roller 52 and the structure to be welded.

[0058] Furthermore, in order to reduce the probability of the airbag 54 being further squeezed and damaged when it is expanded to the limit state, the clamping member 32 is preferably provided with a clearance space 322 at one end away from the corresponding base 31 for the airbag 54 to be squeezed and deformed in the expanded state.

[0059] The clearance space 322 is annular in structure, the axis of which coincides with the axis of the activity space 321 , and the clearance space 322 is connected to the part of the activity space 321 away from its opening; when the airbag 54 expands to the limit state, the clearance space 322 can completely surround the airbag 54 .

[0060] Furthermore, in order to improve the effect of the rotating roller 52 driving the structure to be welded to move when the rotating roller 52 contacts and abuts against the structure to be welded, and at the same time reduce the probability of the structure to be welded being damaged due to the force of the rotating roller 52 during the movement, it is preferred that an elastic contact layer 521 is also installed on the radial circumferential side of the rotating roller 52.

[0061] The contact layer 521 is a sleeve-shaped structure, which is sleeved and installed on the rotating roller 52 and fixedly connected to the rotating roller 52 to reduce the probability of relative slip between the rotating roller 52 and the contact layer 521; the outer surface of the contact layer 521 is evenly distributed with anti-skid patterns, which are used to increase the friction between the contact layer 521 and the structure to be welded after the two are in contact, thereby reducing the probability of relative slip between the rotating roller 52 and the structure to be welded during the rotation process after the rotating roller 52 contacts the structure to be welded. In this embodiment, the contact layer 521 is preferably made of rubber material.

[0062] The plurality of visual sensors 6 correspond one-to-one to the plurality of adjusting devices 5 . The visual sensors 6 are fixedly mounted on the pressing member 32 where the corresponding adjusting device 5 is located, and are located at a position where the corresponding pressing member 32 is close to the corresponding base 31 .

[0063] The visual sensor 6 can measure the distance between the object and itself in the direction close to the corresponding adjustment device 5. When the clamping member 32 rotates to the extreme position close to the corresponding base 21, the visual sensor 6 can measure in the direction close to the space between the clamping member 32 and the corresponding base 21. If the structure to be welded is clamped and positioned in the above space, the visual sensor 6 can measure the distance between the part of the structure to be welded located in the space and itself. In this embodiment, the measuring direction of the visual sensor 6 is preferably parallel to the length direction of the corresponding clamping member 32, and is aligned with the space on the side of the opening of the activity space 321 of the clamping member 32 along its own measuring direction. Since the visual sensor 6 with the above functions is a common prior art, it will not be described in detail here, and it is only briefly represented in the accompanying drawings.

[0064] The visual sensor 6 is connected to the signal of the second driving member 53 of the corresponding adjusting device 5. When the clamping device 3 presses and positions the structure to be welded, if the data detected by the visual sensor 6 is different from the data detected when the structure to be welded is accurately placed, the visual sensor 6 can output a signal to control the corresponding second driving member 53 to drive the rotating roller 52 to rotate, thereby driving the structure to be welded to move until the data detected by the visual sensor 6 is within a preset numerical range. At this time, the position accuracy of the structure to be welded on the base body 1 meets the requirements, and can also improve the welding effect after subsequent positioning.

[0065] Multiple protective parts 7 correspond one by one to multiple visual sensors 6. The protective parts 7 are fixedly mounted on the clamping part 32 where the corresponding visual sensor 6 is located, and are located on the side of the corresponding visual sensor 6 close to the corresponding adjustment device 5. When welding is in progress, the location where high temperature is generated around the visual sensor 6 will mainly appear in the positioning space 4, and the protective part 7 is away from the side of the corresponding visual sensor 6.

[0066] The protective member 7 can be expanded and contracted by gas flowing in and out of the protective member 7. In this embodiment, the protective member 7 is preferably made of a rubber material with a heat-insulating function, and the protective member 7 has a certain degree of flexibility and can expand and contract with changes in the surrounding temperature; the protective member 7 can be expanded into a sheet structure after being filled with gas, and can be automatically contracted into a strip structure after the gas inside the protective member 7 is discharged.

[0067] When the interior of the protective member 7 is filled with gas and stretched to its limit state, the protective member 7 can form protection on the side of the corresponding visual sensor 6 close to the corresponding adjustment device 5, effectively preventing the high temperature generated during the welding process from directly acting on the corresponding visual sensor 6, thereby effectively reducing the probability of failure of the visual sensor 6 after being affected by high temperature and extending the service life of the visual sensor 6.

[0068] Reference Figure 6 and Figure 7 Furthermore, when the protective member 7 is in a state of being extended to the limit, the protective member 7 is in a rectangular sheet structure, the length direction of which is parallel to the rotation axis of the corresponding clamping member 32 and the width direction is parallel to the movement direction of the corresponding movable seat 51.

[0069] At this time, when the position where high temperature is generated in the positioning space 4 is located on the side of the protective member 7 away from the corresponding visual sensor 6 but not aligned with the measuring direction of the corresponding visual sensor 6, the end of the protective member 7 close to the high temperature position in the length direction will first expand and contract due to heat, and bend and deform in the direction close to the corresponding visual sensor 6, so that the end of the protective member 7 in the length direction is closer to the corresponding visual sensor 6, thereby expanding the protection range of the corresponding visual sensor 6, so as to effectively improve the protection effect of the corresponding visual sensor 6.

[0070] Furthermore, it is preferred that the distance between the protective member 7 and the corresponding visual sensor 6 is smaller. When the protective member 7 is stretched to the limit and expands and contracts as a whole under the high temperature of the surrounding environment, the two ends of the protective member 7 in the length direction will bend and deform in the direction close to the corresponding visual sensor 6, so that the protective member 7 as a whole presents an arc-shaped sheet structure with its opening facing the corresponding visual sensor 6. At this time, after the protective member 7 is bent and deformed, the protection range of the corresponding visual sensor 6 is maximized, thereby further improving the protection effect of the protective member 7 on the corresponding visual sensor 6 in a high temperature environment.

[0071] Reference Figure 5 and Figure 6 When the gas inside the protective member 7 is discharged and causes it to shrink to the limit state, the protective member 7 will release the protection of the corresponding visual sensor 6, so that the measurement of the distance between the corresponding visual sensor 6 and the structure to be welded will not be affected by the protective member 7, thereby improving the reliability of the detection result.

[0072] The corresponding second air control unit 55 also extends an air pipe outwardly to be connected to the protective member 7 and communicate with the internal space of the protective member 7. At this time, the second air control unit 55 can control the exchange of gas inside the airbag 54 and gas inside the protective member 7.

[0073] When the airbag 54 expands to its limit state, the protective member 7 is in a state of contraction to its limit, which facilitates the cooperation among the visual sensor 6, the corresponding protective member 7 and the corresponding adjustment device 5 to adjust the position of the structure to be welded by measuring the distance between the current structure to be welded and the visual sensor 6; when the airbag 54 shrinks to its limit state, the protective member 7 is in a state of extension to its limit, which facilitates the welding of the structure to be welded by the friction stir welding equipment with higher position accuracy and position stability, and reduces the probability of the corresponding visual sensor 6 being damaged by high temperature during the welding process.

[0074] The implementation principle of a positioning base for friction stir welding in the embodiment of the present application is: After placing the structure to be welded on the base 1, the plurality of clamping devices 3 are first activated to initially clamp and position the structure to be welded between the plurality of clamping members 32 and the plurality of bases 21; Then, the multiple visual sensors 6 and the multiple adjustment devices 5 are started, and the visual sensors 6 measure the distance between the structure to be welded and itself in the detection area. If the measured data is inconsistent with the preset data (i.e., the distance data when the structure to be welded is placed with the required position accuracy), the visual sensor 6 controls the corresponding adjustment device 5 to drive the corresponding rotating roller 52 to rotate so as to drive the displacement adjustment of the structure to be welded, until the values ​​detected by the multiple visual sensors 6 meet the requirements; Then, the plurality of adsorption devices 2 are activated to adsorb and position the structures to be welded above the plurality of bases 21; and the second air control unit 55 is controlled to shrink the corresponding airbags 54 and extend the corresponding protective members 7, so that the rotating rollers 52 are no longer in contact with the structures to be welded, and the protective members 7 protect the corresponding visual sensors 6; Then, the friction stir welding equipment performs welding operation on the structure to be welded. During the welding process, the protective component 7 can effectively reduce the influence of high temperature on the corresponding visual sensor 6 and extend the service life of the corresponding visual sensor 6.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning base for friction stir welding, characterized in that: It comprises a seat body (1), a plurality of adsorption devices (2) and a plurality of pressing devices (3); One side of the base body (1) is provided with a positioning space (4) for positioning the structure to be welded, the side of the base body (1) close to the positioning space (4) is provided with a plurality of positioning members (11) adapted to the structure to be welded, and the side of the base body (1) close to the positioning space (4) is also provided with a plurality of positioning openings (12) adapted to the structure to be welded; The adsorption device (2) comprises a base (21) and a first air control component (22); the base (21) is arranged on a side of the base body (1) close to the positioning space (4), and the first air control component (22) is arranged on the base body (1) and connected to the base (21); the base (21) has a cavity (211) inside, and two ends of the cavity (211) are respectively in communication with the positioning space (4) and the first air control component (22); The number of the pressing devices (3) is no more than the number of the adsorption devices (2), and the pressing devices (3) are matched with adjacent adsorption devices (2), and the pressing devices (3) are located on one side of the corresponding adsorption device (2); The clamping device (3) comprises a base (31), a clamping member (32) and a first driving member (33); the base (31) is arranged on a side of the base body (1) close to the positioning space (4); one end of the clamping member (32) is rotatably connected to the base (31), and when the clamping member (32) rotates to an extreme position toward the corresponding base (21), the end of the clamping member (32) away from the base (31) is located on a side of the corresponding base (21) close to the positioning space (4), and can clamp and position the structure to be welded together with the corresponding base (21); the first driving member (33) is arranged on the base (31) and can drive the clamping member (32) to rotate relative to the base (31).

2. A positioning base for friction stir welding according to claim 1, characterized in that: It also comprises a plurality of adjusting devices (5), wherein the plurality of adjusting devices (5) correspond one-to-one to the plurality of pressing members (32), and the adjusting devices (5) are arranged at an end of the corresponding pressing member (32) away from the base (31); The adjusting device (5) comprises a plurality of rotating rollers (52) and a second driving member (53); the rotating rollers (52) are capable of rotating relative to the corresponding pressing members (32), and the second driving member (53) is capable of driving the rotating rollers (52) to rotate; When the pressing member (32) and the corresponding base (21) clamp the structure to be welded in place, the rotating roller (52) contacts and abuts against the structure to be welded, and at this time, the rotation of the rotating roller (52) can drive the structure to be welded to move within the plane where it is located.

3. A positioning base for friction stir welding according to claim 2, characterized in that: It also includes a plurality of visual sensors (6), wherein the plurality of visual sensors (6) correspond one-to-one to the plurality of pressing members (32), and the visual sensors (6) are arranged on corresponding pressing members (32); The visual sensor (6) is signal-connected to the corresponding second driving member (53); when the pressing member (32) and the corresponding base (21) clamp the structure to be welded in place, the corresponding visual sensor (6) can measure the distance between itself and an adjacent portion of the structure to be welded.

4. A positioning base for friction stir welding according to claim 3, characterized in that: It also includes a plurality of retractable protective members (7), wherein the plurality of protective members (7) correspond one-to-one to the plurality of visual sensors (6), and the protective members (7) are arranged on the corresponding pressing members (32) and are located on a side of the corresponding visual sensor (6) away from the corresponding base platform (31).

5. A positioning base for friction stir welding according to claim 4, characterized in that: The adjusting device (5) further comprises a movable seat (51); The plurality of rotating rollers (52) and the second driving member (53) are all disposed on the movable seat (51), and the movable seat (51) is movably connected to the corresponding pressing member (32); When the pressing piece (32) and the corresponding base (21) clamp and position the structure to be welded, the movable direction of the movable seat (51) is perpendicular to the plane where the structure to be welded is located.

6. A positioning base for friction stir welding according to claim 5, characterized in that: The regulating device (5) further comprises an air bag (54) and a second air control unit (55); The airbag (54) is arranged inside the corresponding pressing member (32), and two ends of the airbag (54) are respectively connected to the movable seat (51) and the pressing member (32); The second air control part (55) is arranged on the corresponding pressing part (32), the second air control part (55) is in communication with the interior of the air bag (54), and is capable of controlling the expansion and contraction of the air bag (54) so ​​as to drive the movable seat (51) to move.

7. A positioning base for friction stir welding according to claim 6, characterized in that: The protective member (7) is extended and retracted by gas flowing in and out, the second gas control unit (55) is connected to the corresponding protective member (7), and when the protective member (7) is inflated and extended, the corresponding airbag (54) is shrunk until the corresponding rotating roller (52) is located inside the pressing member (32).

8. A positioning base for friction stir welding according to claim 6, characterized in that: The airbag (54) is elastic, and one end of the pressing member (32) away from the corresponding base (31) has a movable space (321) for the movable seat (51) to move, and a clearance space (322) for the airbag (54) to deform is provided; When the airbag (54) expands, the corresponding movable seat (51) has a tendency to move to cause the rotating roller (52) to be located outside the movable space (321).

9. A positioning base for friction stir welding according to claim 3, characterized in that: The rotation axis of the rotating roller (52) is parallel to the rotation axis of the corresponding pressing member (32).

10. A positioning base for friction stir welding according to claim 2, characterized in that: The surface of the rotating roller (52) is covered with an elastic contact layer (521), and the surface of the contact layer (521) is provided with anti-slip patterns.

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