A device for automatic deburring of friction stir welding

Abstract

The present application relates to the field of friction stir welding processing equipment, in particular to a kind of automatic deburring device for friction stir welding, including rotary drive source, be set in the output of rotary drive source, by setting deburring assembly, deburring assembly includes rough grinding unit and fine grinding unit, rough grinding unit is connected with the output of rotary drive source by linkage structure, so that rough grinding rod and rough grinding head can be rotated simultaneously with rotary drive source while friction welding assembly carries out welding operation, to synchronously complete the rough grinding removal of weld edge burr in welding process, avoid the interruption of production process caused by the need to transfer workpiece to polishing equipment or change tool after welding, improve production efficiency;By setting fine grinding unit, fine grinding unit includes the fine grinding rod of vertical sliding arrangement and the fine grinding head of fixed connection in the bottom end of fine grinding rod, fine grinding rod is connected with depth adjustment driving element, depth adjustment driving element can drive fine grinding rod to move vertically to adjust the fine grinding depth of fine grinding head.

Description

Technical Field

[0001] This invention relates to the field of friction stir welding equipment, and more particularly to an automatic deburring device for friction stir welding. Background Technology

[0002] Friction stir welding is a solid-state joining technique that utilizes the frictional heat generated between a high-speed rotating stirring head and the workpiece to bring the material in the weld area to a thermoplastic state. Through the rotation and forward movement of the stirring head, the plasticized material flows from the front to the rear of the stirring head and forms a dense weld under the pressure of the shoulder. Friction stir welding is widely used in aerospace, rail transportation, shipbuilding, and new energy vehicle industries due to its advantages such as high weld quality, minimal deformation, and no spatter.

[0003] During friction stir welding, due to the rotating and squeezing action of the stirring head, the ductile metal material at the edge of the weld will overflow into the shoulder cavity. After cooling, it forms burrs or flash. These burrs not only affect the appearance quality of the weld, but may also interfere with subsequent assembly processes, and even become stress concentration sources affecting the mechanical properties of the weld. Currently, the common method for removing burrs is post-weld mechanical grinding or milling. However, this method has the following drawbacks: First, it requires an additional process: after welding, the workpiece needs to be transferred to grinding equipment or the tool needs to be replaced, which leads to interruption of the production process and reduces production efficiency. Second, it is easy to damage the surface of the workpiece: the grinding operation is difficult to precisely control the cutting amount, which can easily damage the surface of the base material around the weld and affect the dimensional accuracy of the workpiece. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a structure for an automatic deburring device for friction stir welding.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic deburring device for friction stir welding, comprising:

[0006] Rotary drive source;

[0007] A friction welding assembly is disposed at the output end of the rotary drive source. The friction welding assembly includes a welding arm fixedly connected to the output end of the rotary drive source and a friction welding head fixedly connected to the bottom end of the welding arm. Both the welding arm and the friction welding head have channels for the welding material to pass through.

[0008] A deburring assembly is disposed beside the rotary drive source. The deburring assembly includes a coarse grinding unit for coarsely grinding and removing weld burrs and a fine grinding unit for finely grinding and finishing the weld surface.

[0009] The rough grinding unit includes a rotatably mounted rough grinding rod and a rough grinding head fixedly connected to the bottom end of the rough grinding rod. A linkage structure is provided between the rough grinding rod and the rotary drive source. The linkage structure is used to make the rough grinding rod rotate synchronously with the rotary drive source.

[0010] The fine grinding unit includes a fine grinding rod that slides vertically and a fine grinding head that is fixedly connected to the bottom end of the fine grinding rod. The fine grinding rod is connected to a depth adjustment drive, which is used to drive the fine grinding rod to move vertically to adjust the fine grinding depth of the fine grinding head.

[0011] Both the rough grinding head and the rough grinding rod are hollow structures, and the space enclosed inside the rough grinding head and the rough grinding rod is used to accommodate the fine grinding rod and the fine grinding head.

[0012] Furthermore, the rotation drive source is a control host, a controller is fixedly connected to the front end of the control host, a connecting clamp is fixedly connected to the bottom end of the control host, a fixing bolt is installed on the outside of the connecting clamp, the connecting clamp is driven to rotate by a motor installed in the control host, and the welding arm is inserted into the bottom end of the connecting clamp.

[0013] Furthermore, the control host has two symmetrically opened guide grooves on its side, and a depth adjustment push rod is fixedly connected inside each of the two guide grooves. The fine grinding unit also includes a movable support, and two guide sliders are symmetrically fixedly connected to the outer wall of the movable support. The movable support is slidably set in the guide groove through the guide sliders. A connecting frame is fixedly connected to the side of the movable support away from the control host, and the fine grinding rod is rotatably installed on the connecting frame.

[0014] Furthermore, the connecting frame has a through hole inside, and a first bearing seat is embedded inside the through hole. The precision grinding rod is rotatably mounted on the inner side of the first bearing seat.

[0015] Furthermore, the linkage structure includes a first linkage component fixedly installed at the output end of the rotary drive source, a second linkage component fixedly connected to the outer wall of the roughing rod, and a transmission medium connecting the first linkage component and the second linkage component.

[0016] Furthermore, the first linkage component is a first linkage pulley, the second linkage component is a second linkage pulley, and the transmission medium is a linkage belt.

[0017] Furthermore, a linkage block is fixedly connected to the outer wall of the fine grinding rod, and a linkage slot corresponding to the linkage block is opened on the outer wall of the rough grinding rod. When the linkage block is inserted into the linkage slot, the fine grinding rod is in a state of synchronous rotation with the rough grinding rod.

[0018] Furthermore, the roughing unit also includes a mounting bracket and a support frame. The mounting bracket is fixedly mounted on the side of the rotary drive source, the support frame is fixedly connected to the mounting bracket, the roughing rod is rotatably mounted on the support frame, and a mounting base plate with fastening bolts is fixedly connected to the outside of the mounting bracket.

[0019] Furthermore, the support frame has a hollow structure, and a second bearing seat is embedded inside the support frame. The roughing rod is rotatably installed inside the second bearing seat.

[0020] Furthermore, the hollow area inside the rough grinding head is connected to the hollow area inside the rough grinding rod, and the inner diameter of the rough grinding head is larger than the outer diameter of the fine grinding head, the inner diameter of the rough grinding rod is larger than the outer diameter of the fine grinding rod, and the lowest point of the rough grinding head and the lowest point of the friction welding head are located on the same horizontal plane.

[0021] The present invention has the following beneficial effects:

[0022] 1. Compared with the prior art, this automatic deburring device for friction stir welding, by setting up a deburring assembly, includes a rough grinding unit and a fine grinding unit. The rough grinding unit is connected to the output end of the rotary drive source through a linkage structure, so that the rough grinding rod and rough grinding head can rotate synchronously with the rotary drive source while the friction stir welding assembly is performing welding operations. This allows for the simultaneous rough grinding removal of burrs on the weld edge during the welding process, avoiding production interruptions caused by transferring the workpiece to the grinding equipment or changing the tool after welding, thus improving production efficiency. By setting up a fine grinding unit, including a fine grinding rod that slides vertically and a fine grinding head fixedly connected to the bottom end of the fine grinding rod, the fine grinding rod is connected to a depth adjustment drive component. The depth adjustment drive component can drive the fine grinding rod to move vertically to adjust the fine grinding depth of the fine grinding head, so that the fine grinding head can perform fine grinding and finishing on the weld surface after the rough grinding removes the burrs. Moreover, the fine grinding depth can be adjusted according to the actual weld conditions, avoiding damage to the workpiece surface caused by a single grinding depth.

[0023] 2. Compared with the prior art, this automatic deburring device for friction stir welding features a hollow structure for the rough grinding head and rough grinding rod. The space enclosed by the rough grinding head and rough grinding rod is used to accommodate the fine grinding rod and fine grinding head. When only rough grinding is required, the fine grinding rod and fine grinding head can be completely retracted into the space enclosed by the rough grinding rod and rough grinding head, and the rough grinding head independently removes the weld burrs. When only fine grinding is required, the fine grinding rod and fine grinding head can extend out from the space enclosed by the rough grinding rod and rough grinding head, and the fine grinding head independently performs fine grinding and finishing on the weld surface. This device can flexibly switch between rough grinding and fine grinding operations according to actual operational needs, avoiding interference between the rough grinding unit and the fine grinding unit, and expanding the applicability of the device.

[0024] 3. Compared with existing technologies, this automatic deburring device for friction stir welding, by setting a linkage block and a linkage slot, allows the fine grinding rod to rotate synchronously with the rough grinding rod when the linkage block on the outer wall of the fine grinding rod is inserted into the linkage slot on the outer wall of the rough grinding rod. When the linkage block is removed from the linkage slot, the fine grinding rod and the rough grinding rod are no longer synchronously rotated, and the fine grinding rod and the fine grinding head can be independently adjusted vertically. This allows for independent adjustment of the fine grinding depth of the fine grinding head while ensuring that the fine grinding head can obtain rotational driving force. The lowest point of the rough grinding head is located on the same horizontal plane as the lowest point of the friction welding head, enabling the rough grinding head to remove the burrs formed after the weld edge cools down while welding is in progress. This achieves integrated welding and deburring operations, reduces on-site manual operation, and improves construction efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the front view of the disassembled and cut structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall top-side view of the present invention;

[0027] Figure 3 This is a schematic diagram of the roughing rod structure of the present invention;

[0028] Figure 4 This is a top-side view of the structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the precision grinding rod structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the control host structure of the present invention;

[0031] Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0032] Figure 8 For the present invention Figure 4 Enlarged structural diagram at point B;

[0033] Legend:

[0034] 1. Control host; 101. Controller; 1011. Connecting clamp; 1012. Fixing bolt; 1013. Welding arm; 1014. Friction welding head; 2. Guide groove; 201. Depth adjustment push rod; 3. Moving support; 301. Guide slider; 3011. Connecting frame; 3012. First bearing seat; 4. Grinding rod; 401. Linkage insert; 4011. Grinding head; 5. Mounting bracket; 501. Mounting base plate; 5011. Fastening bolt; 6. Support frame; 601. Second bearing seat; 6011. Rough grinding rod; 6012. Linkage slot; 6013. Rough grinding head; 7. First linkage pulley; 701. Second linkage pulley; 7011. Linkage belt. Detailed Implementation

[0035] Reference Figure 1 - Figure 8 The present invention provides an automatic deburring device for friction stir welding, comprising:

[0036] Rotary drive source;

[0037] Friction welding assembly is located at the output end of a rotary drive source. The friction welding assembly includes a welding arm 1013 fixedly connected to the output end of the rotary drive source and a friction welding head 1014 fixedly connected to the bottom end of the welding arm 1013. Both the welding arm 1013 and the friction welding head 1014 have channels for passing through the welding material.

[0038] The deburring assembly is located beside the rotary drive source. The deburring assembly includes a rough grinding unit for rough grinding and removing weld burrs and a fine grinding unit for fine grinding and finishing the weld surface.

[0039] The rough grinding unit includes a rotatable rough grinding rod 6011 and a rough grinding head 6013 fixedly connected to the bottom end of the rough grinding rod 6011. A linkage structure is provided between the rough grinding rod 6011 and the rotary drive source. The linkage structure is used to make the rough grinding rod 6011 rotate synchronously with the rotary drive source.

[0040] The fine grinding unit includes a fine grinding rod 4 that is slidably arranged vertically and a fine grinding head 4011 that is fixedly connected to the bottom end of the fine grinding rod 4. The fine grinding rod 4 is connected to a depth adjustment drive, which is used to drive the fine grinding rod 4 to move vertically to adjust the fine grinding depth of the fine grinding head 4011.

[0041] Both the rough grinding head 6013 and the rough grinding rod 6011 are hollow structures. The space enclosed by the rough grinding head 6013 and the rough grinding rod 6011 is used to accommodate the fine grinding rod 4 and the fine grinding head 4011.

[0042] The rotation drive source is the control host 1. A controller 101 is fixedly connected to the front end of the control host 1. A connecting clamp 1011 is fixedly connected to the bottom end of the control host 1. A fixing bolt 1012 is installed on the outside of the connecting clamp 1011. The connecting clamp 1011 is driven to rotate by the motor installed in the control host 1. The welding arm 1013 is inserted into the bottom end of the connecting clamp 1011.

[0043] The control host 1 has two guide grooves 2 symmetrically opened on its side. The depth adjustment push rod 201 is fixedly connected inside the two guide grooves 2. The fine grinding unit also includes a movable support 3. Two guide sliders 301 are symmetrically fixedly connected to the outer wall of the movable support 3. The movable support 3 is slidably set in the guide groove 2 through the guide sliders 301. A connecting frame 3011 is fixedly connected to the side of the movable support 3 away from the control host 1. The fine grinding rod 4 is rotatably installed on the connecting frame 3011.

[0044] The connecting frame 3011 has a through hole inside, and a first bearing seat 3012 is embedded inside the through hole. The fine grinding rod 4 is rotatably installed on the inner side of the first bearing seat 3012.

[0045] The linkage structure includes a first linkage component fixedly installed at the output end of the rotary drive source, a second linkage component fixedly connected to the outer wall of the roughing rod 6011, and a transmission medium connecting the first linkage component and the second linkage component.

[0046] The first linkage component is the first linkage pulley 7, the second linkage component is the second linkage pulley 701, and the transmission medium is the linkage belt 7011.

[0047] Among them, a linkage block 401 is fixedly connected to the outer wall of the fine grinding rod 4, and a linkage slot 6012 corresponding to the linkage block 401 is opened on the outer wall of the rough grinding rod 6011. When the linkage block 401 is inserted into the linkage slot 6012, the fine grinding rod 4 is in a state of synchronous rotation with the rough grinding rod 6011.

[0048] The rough grinding unit also includes a mounting bracket 5 and a support frame 6. The mounting bracket 5 is fixedly mounted on the side of the rotary drive source, and the support frame 6 is fixedly connected to the mounting bracket 5. The rough grinding rod 6011 is rotatably mounted on the support frame 6. The outer side of the mounting bracket 5 is fixedly connected to a mounting base plate 501 with a fastening bolt 5011.

[0049] Among them, the support frame 6 has a hollow structure, and the second bearing seat 601 is embedded inside the support frame 6. The rough grinding rod 6011 is rotatably installed inside the second bearing seat 601.

[0050] The internal hollow area of ​​the rough grinding head 6013 is connected to the internal hollow area of ​​the rough grinding rod 6011. The inner diameter of the rough grinding head 6013 is larger than the outer diameter of the fine grinding head 4011, and the inner diameter of the rough grinding rod 6011 is larger than the outer diameter of the fine grinding rod 4. The lowest point of the rough grinding head 6013 and the lowest point of the friction welding head 1014 are located on the same horizontal plane.

[0051] Working principle: The operator starts the control host 1 through the controller 101. The motor inside the control host 1 drives the connecting clamp 1011 to rotate. The connecting clamp 1011 drives the welding arm 1013 inserted at its bottom to rotate synchronously. The welding arm 1013 drives the friction welding head 1014 fixedly connected to its bottom to rotate. The operator passes the welding material through the channel opened inside the welding arm 1013 and the friction welding head 1014 and delivers it to the weld position. The rotating friction welding head 1014 generates frictional heat between itself and the workpiece, so that the material in the weld area is in a thermoplastic state. As the control host 1 moves along the weld direction, the plasticized material forms a dense weld under the extrusion of the friction welding head 1014.

[0052] While the host 1 drives the friction welding head 1014 to perform welding, the first linkage pulley 7 installed on the outside of the connecting fixture 1011 rotates synchronously with the connecting fixture 1011. The first linkage pulley 7 transmits the rotation to the second linkage pulley 701 through the linkage belt 7011. The second linkage pulley 701 drives the rough grinding rod 6011 fixedly connected to its inner side to rotate in the second bearing seat 601. The rough grinding rod 6011 drives the rough grinding head 6013 fixedly connected to its bottom end to rotate. The lowest point of the rough grinding head 6013 and the lowest point of the friction welding head 1014 are located on the same horizontal plane, so that the rough grinding head 6013 rough grinds and removes the burrs formed after the weld edge cools down while welding is being performed.

[0053] During the rotation of the roughing rod 6011, when the linkage block 401 on the outer wall of the finishing rod 4 is inserted into the linkage slot 6012 on the outer wall of the roughing rod 6011, the finishing rod 4 rotates synchronously with the roughing rod 6011. The finishing rod 4 drives the finishing head 4011, which is fixedly connected to its bottom end, to rotate. The finishing head 4011 performs finishing on the weld surface after roughing by the roughing head 6013. The operator controls the depth adjustment push rod 201 to move through the controller 101. 01. The movable support 3 is pushed to move vertically along the guide groove 2. The movable support 3 slides with the guide slider 301 on its outer wall to maintain the stability of the moving direction. The movable support 3 drives the connecting frame 3011 fixedly connected to it to move synchronously. The connecting frame 3011 drives the fine grinding rod 4 and the fine grinding head 4011 fixedly connected to the bottom of the fine grinding rod 4 to move vertically through the first bearing seat 3012 embedded inside it, thereby adjusting the fine grinding head 4011 to the required fine grinding depth.

[0054] When only rough grinding is required and no fine grinding is needed, the operator pulls the fine grinding rod 4 upwards, causing the linkage block 401 on the outer wall of the fine grinding rod 4 to exit from the linkage slot 6012 on the outer wall of the rough grinding rod 6011. At this time, the fine grinding rod 4 and the rough grinding rod 6011 are decoupled from synchronous rotation. The operator then pulls the fine grinding rod 4 upwards further, so that the fine grinding rod 4 and the fine grinding head 4011 are completely retracted into the receiving space enclosed by the rough grinding rod 6011 and the rough grinding head 6013. Under the drive of the control host 1, the rough grinding head 6013 independently performs rough grinding to remove weld burrs.

[0055] When only fine grinding is required and rough grinding is not needed, the operator controls the depth adjustment push rod 201 through the controller 101. The depth adjustment push rod 201 drives the movable support 3 to move downward along the guide groove 2. The movable support 3 drives the fine grinding rod 4 and the fine grinding head 4011 to extend out of the receiving space enclosed by the rough grinding rod 6011 and the rough grinding head 6013 through the connecting frame 3011. The operator controls the motor inside the host 1 through the controller 101 to drive the connecting clamp 1011 to rotate. The connecting clamp 1011 drives the rough grinding rod 6011 to rotate through the first linkage pulley 7, the linkage belt 7011 and the second linkage pulley 701. Since the linkage insert 401 of the fine grinding rod 4 is inserted into the linkage slot 6012 of the rough grinding rod 6011, the fine grinding rod 4 rotates synchronously with the rough grinding rod 6011. The fine grinding head 4011 independently performs fine grinding and finishing on the weld surface.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic deburring device for friction stir welding, characterized in that: include: Rotary drive source; Friction welding assembly is disposed at the output end of the rotary drive source. The friction welding assembly includes a welding arm (1013) fixedly connected to the output end of the rotary drive source and a friction welding head (1014) fixedly connected to the bottom end of the welding arm (1013). The welding arm (1013) and the friction welding head (1014) are both provided with channels for the welding material to pass through. A deburring assembly is disposed beside the rotary drive source. The deburring assembly includes a coarse grinding unit for coarsely grinding and removing weld burrs and a fine grinding unit for finely grinding and finishing the weld surface. The rough grinding unit includes a rotatably mounted rough grinding rod (6011) and a rough grinding head (6013) fixedly connected to the bottom end of the rough grinding rod (6011). A linkage structure is provided between the rough grinding rod (6011) and the rotary drive source. The linkage structure is used to make the rough grinding rod (6011) rotate synchronously with the rotary drive source. The fine grinding unit includes a fine grinding rod (4) that is slidably arranged vertically and a fine grinding head (4011) that is fixedly connected to the bottom end of the fine grinding rod (4). The fine grinding rod (4) is connected to a depth adjustment drive, which is used to drive the fine grinding rod (4) to move vertically to adjust the fine grinding depth of the fine grinding head (4011). Both the rough grinding head (6013) and the rough grinding rod (6011) are hollow structures. The space enclosed by the rough grinding head (6013) and the rough grinding rod (6011) is used to accommodate the fine grinding rod (4) and the fine grinding head (4011).

2. The automatic deburring device for friction stir welding according to claim 1, characterized in that: The rotation drive source is a control host (1). A controller (101) is fixedly connected to the front end of the control host (1). A connecting clamp (1011) is fixedly connected to the bottom end of the control host (1). A fixing bolt (1012) is installed on the outside of the connecting clamp (1011). The connecting clamp (1011) is driven to rotate by a motor installed in the control host (1). The welding arm (1013) is inserted into the bottom end of the connecting clamp (1011).

3. The automatic deburring device for friction stir welding according to claim 2, characterized in that: The control host (1) has two guide grooves (2) symmetrically opened on its side. The depth adjustment push rod (201) is fixedly connected inside the two guide grooves (2). The fine grinding unit also includes a movable support (3). Two guide sliders (301) are symmetrically fixedly connected to the outer wall of the movable support (3). The movable support (3) is slidably set in the guide groove (2) through the guide sliders (301). A connecting frame (3011) is fixedly connected to the side of the movable support (3) away from the control host (1). The fine grinding rod (4) is rotatably installed on the connecting frame (3011).

4. The automatic deburring device for friction stir welding according to claim 3, characterized in that: The connecting frame (3011) has a through hole inside, and a first bearing seat (3012) is embedded inside the through hole. The fine grinding rod (4) is rotatably installed on the inside of the first bearing seat (3012).

5. The automatic deburring device for friction stir welding according to claim 1, characterized in that: The linkage structure includes a first linkage component fixedly installed at the output end of the rotary drive source, a second linkage component fixedly connected to the outer wall of the roughing rod (6011), and a transmission medium connecting the first linkage component and the second linkage component.

6. The automatic deburring device for friction stir welding according to claim 5, characterized in that: The first linkage component is the first linkage pulley (7), the second linkage component is the second linkage pulley (701), and the transmission medium is the linkage belt (7011).

7. The automatic deburring device for friction stir welding according to claim 1, characterized in that: A linkage plug (401) is fixedly connected to the outer wall of the fine grinding rod (4), and a linkage slot (6012) corresponding to the linkage plug (401) is opened on the outer wall of the rough grinding rod (6011). When the linkage plug (401) is inserted into the linkage slot (6012), the fine grinding rod (4) is in a state of synchronous rotation with the rough grinding rod (6011).

8. The automatic deburring device for friction stir welding according to claim 1, characterized in that: The roughing unit also includes a mounting bracket (5) and a support frame (6). The mounting bracket (5) is fixedly mounted on the side of the rotary drive source. The support frame (6) is fixedly connected to the mounting bracket (5). The roughing rod (6011) is rotatably mounted on the support frame (6). The outer side of the mounting bracket (5) is fixedly connected to a mounting base plate (501) with a fastening bolt (5011).

9. The automatic deburring device for friction stir welding according to claim 8, characterized in that: The support frame (6) has a hollow structure, and a second bearing seat (601) is embedded inside the support frame (6). The coarse grinding rod (6011) is rotatably installed inside the second bearing seat (601).

10. The automatic deburring device for friction stir welding according to claim 1, characterized in that: The hollow area inside the rough grinding head (6013) is connected to the hollow area inside the rough grinding rod (6011), and the inner diameter of the rough grinding head (6013) is larger than the outer diameter of the fine grinding head (4011), the inner diameter of the rough grinding rod (6011) is larger than the outer diameter of the fine grinding rod (4), and the lowest point of the rough grinding head (6013) and the lowest point of the friction welding head (1014) are located on the same horizontal plane.

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