Friction stir welding mechanism capable of synchronously polishing flash

Abstract

The utility model discloses a friction stir welding mechanism capable of synchronously polishing flashes. The friction stir welding mechanism comprises a base, a workbench, a welding mechanism and a floating polishing mechanism, wherein the workbench, the welding mechanism and the floating polishing mechanism are installed on the base. The welding mechanism and the floating polishing mechanism are both located above the workbench. The workbench can move horizontally; the welding mechanism comprises a stirring driving motor mounted on the base, a main shaft in transmission connection with the stirring driving motor and a stirring head mounted at the bottom of the main shaft; the floating grinding mechanism comprises a mechanical arm installed on the base, a floating connecting piece installed at the output end of the mechanical arm and a grinding assembly installed on the floating connecting piece. The grinding assembly is located on one side of the stirring head. The floating polishing mechanism and the welding mechanism are both integrated on the same device, manual polishing is not needed after welding is completed, additional devices are not needed to be arranged to remove flashes of welded workpieces, and therefore production procedures are reduced, working efficiency is improved, and machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding mechanism technical field, concretely relates to a kind of stir friction welding mechanism of synchronous burring. BACKGROUND

[0002] The basic principle of stir friction welding is that the high-speed rotating stir head is inserted into the workpiece to be welded and moves along the welding direction, generating friction heat at the contact position to make the local plasticization of the workpiece to be welded, and the plasticized material forms a dense solid-phase weld under the action of stirring and extrusion.

[0003] Among them, for the stir friction machine, the application publication number CN103480963A discloses a kind of stir friction welding machine, which specifically discloses a main shaft head machine box driven by a hydraulic cylinder, a proportional valve arranged side by side with the hydraulic cylinder, a main shaft head supported on the main shaft head machine box, the lower end of the main shaft head extending out of the bottom surface of the main shaft head machine box, and a base provided below the main shaft head, the base is provided with a servo motor, a hydraulic pump and an oil tank, the servo motor is connected with the hydraulic pump, the P end of the proportional valve is connected to the oil tank through an oil inlet pipeline in series with the hydraulic pump, the T end of the proportional valve is connected to the oil tank through an oil return pipeline, the A end of the proportional valve is connected with the rodless cavity of the hydraulic cylinder through a pipeline in series with a second hydraulic lock, and the B end of the proportional valve is connected with the rod cavity of the hydraulic cylinder through a pipeline in series with a third hydraulic lock; A cooling disc is fixedly arranged below the main shaft head machine box, the cooling disc is a circular annular cavity, and surrounds the periphery of the main shaft head, a plurality of spray holes are provided on the upper disc surface of the cooling disc, the spray holes are communicated with the cavity inside the cooling disc, a connector is further provided on the cooling disc, the connector extends into the cooling disc, and the center hole of the connector is communicated with the cavity inside the cooling disc; An accumulator is provided between the hydraulic pump and the P end of the electromagnetic reversing valve, the accumulator is connected with the oil inlet pipeline through a bypass pipe, and a balance valve is connected in series on the oil return pipeline between the T end of the proportional valve and the oil tank.

[0004] However, there is still room for improvement for the above-described friction stir welding machine, for example: during the friction stir welding process, a certain amount of metal residue, i.e. flash, often appears at the edge of the welding surface, which is a common welding defect and needs to be removed after welding. However, the traditional way to remove the flash is to use a manual method to remove it. Specifically, after the friction stir welding is completed, the workpiece is taken out, and the operating personnel use a sander to manually polish and repair the welding surface and remove the excess flash, which increases the labor cost and has uncertain factors in polishing effect for each product. Another way is to directly use a machine to replace manual polishing, for example, after using the above-described friction stir welding machine for friction stir welding, another device is needed to remove the flash. In the step of removing the flash by machine, a certain processing allowance needs to be reserved before the raw material is welded, and then the workpiece is placed on a milling machine after welding to remove the excess allowance and welding flash by the whole removal method, which increases the equipment cost and material cost, and has a higher requirement for the processing technology.

[0005] In summary, no matter which way is used to remove the flash, an additional production process is needed, which reduces the work efficiency and increases the processing cost. Practical new type content

[0006] In view of the problems existing in the prior art, the purpose of the present application is to provide a friction stir welding mechanism capable of synchronous polishing of flash, which integrates the floating polishing mechanism and the welding mechanism in the same device, and the polishing assembly of the floating polishing mechanism can be timely adjusted in position according to the advancing direction of the stir head. This design not only does not need manual polishing after welding, but also does not need to set up another device to remove the flash from the welded workpiece, which undoubtedly reduces the production process, increases the work efficiency and reduces the processing cost.

[0007] In order to achieve the above-mentioned purpose, the technical scheme of the present application is:

[0008] A kind of synchronous burr polishing friction stir welding mechanism, including base and workbench, welding mechanism and floating polishing mechanism respectively installed on the base;The welding mechanism and the floating polishing mechanism are located above the workbench;The workbench can move horizontally in each direction;The welding mechanism includes stir drive motor installed on the base, main shaft for transmission connection with the stir drive motor and stir head installed at the bottom of the main shaft;The floating polishing mechanism includes mechanical arm installed on the base, floating connector installed on the output end of the mechanical arm and polishing assembly installed on the floating connector;The polishing assembly is located at one side of the stir head;During the stir friction welding of the stir head to the workpiece on the workbench, the advancing direction of the stir head can be changed by the movement of the workbench, and the control center can continuously transmit the advancing direction and angle parameters of the stir head to the mechanical arm, so that the mechanical arm can drive the polishing assembly to rotate correspondingly through the floating connector and keep it behind the stir head when advancing, so as to continuously polish burr.

[0009] Further, the mechanical arm is a four-axis mechanical arm;The mechanical arm includes mounting seat fixed on the base, first arm connected horizontally rotatably on the mounting seat, second arm connected horizontally rotatably on the first arm, third arm connected movably up and down on the second arm and fourth arm rotatably connected on the third arm;The floating connector is connected on the fourth arm. Through the above setting, the polishing assembly can be conveniently driven to realize multi-angle position adjustment, so that the polishing assembly can be moved to the rear of the stir head in time.

[0010] Further, the four arms of the mechanical arm all use motor as power source.

[0011] Further, the polishing assembly includes polishing motor mounted on the floating connector through support and polishing sheet connected on the output shaft of the polishing motor. Through the above setting, the polishing sheet can be driven by the polishing motor to polish the burr of the workpiece to remove the burr.

[0012] Further, it also includes X-axis moving assembly and Y-axis moving assembly;The workbench is installed on the X-axis moving assembly, and the X-axis moving assembly is installed on the Y-axis moving assembly. Through the above setting, the workbench can be driven to realize multi-direction and multi-angle horizontal movement.

[0013] Further, the welding mechanism also includes machine head;The machine head is fixed on the base, and the stir drive motor is fixed on the machine head. Through the above setting, the stir drive motor can be conveniently positioned.

[0014] Further, the base comprises a base plate and a gantry installed on the base plate; the workbench is located on the base plate; the welding mechanism and the floating polishing mechanism are both located on the gantry. Through the above arrangement, the head and the mounting seat can be conveniently positioned above the workbench.

[0015] Further, when the stirring head advances in one direction of the X axis relative to the workbench, the mechanical arm drives the polishing assembly to correspondingly move to the X axis; when the stirring head advances in one direction of the Y axis relative to the workbench, the mechanical arm drives the polishing assembly to correspondingly move to the Y axis; when the stirring head advances at an included angle position between the X axis and the Y axis relative to the workbench, the mechanical arm drives the polishing assembly to correspondingly move to the included angle position between the X axis and the Y axis.

[0016] The utility model discloses the beneficial effects are:

[0017] (1) the utility model discloses a polishing assembly can be adjusted to the multi-angle of mechanical arm, thereby when the stirring head of welding mechanism carries out stirring friction welding in the front, the mechanical arm can adjust the position of polishing assembly in time according to the advancing direction of stirring head relative to the workbench, make polishing assembly can keep in the rear of stirring head, like this, the flash that the stirring head stirring friction welding produces can be polished and removed in time by rear polishing assembly, realize the effect of removing redundant flash, and this design makes workpiece not need to keep certain machining allowance before welding.

[0018] (2) the utility model discloses a floating polishing mechanism and welding mechanism are installed on the base, namely, the floating polishing mechanism and welding mechanism are integrated on the same equipment, and the polishing assembly of floating polishing mechanism can correspondingly adjust the position in time according to the advancing direction of stirring head, thereby guaranteeing the use effect. This design not only does not need to adopt manual polishing after welding, also does not need to set up another equipment to remove the flash of the workpiece of welding, which undoubtedly reduces the production procedure, also increases the work efficiency and reduces the processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the schematic diagram of the friction plate of the utility model along X axis and located at one side of the stirring head;

[0020] Figure 2 is the schematic diagram of the friction plate of the utility model along X axis and located at the other side of the stirring head;

[0021] Figure 3 is the schematic diagram of the friction plate of the utility model along Y axis and located at one side of the stirring head;

[0022] Figure 4 is the schematic view of the friction plate along Y axis and located at the other side of the stirring head.

[0023] Reference signs

[0024] 1, base; 11, bottom plate; 12, gantry;

[0025] 2, workbench;

[0026] 3, welding mechanism; 31, main shaft; 32, stirring head; 33, machine head;

[0027] 4, floating polishing mechanism; 41, mechanical arm; 411, mounting seat; 412, first arm; 413, second arm; 414, third arm; 415, fourth arm; 42, floating connecting piece; 43, support; 44, polishing motor; 45, polishing piece. DETAILED DESCRIPTION

[0028] The utility model will be further described below in combination with the drawings and specific embodiments, the following description is only exemplary, not limited the protection scope of the utility model.

[0029] As Figures 1-4 shown, a kind of synchronous polishing flash's friction stir welding mechanism, including base 1 and respectively installed on base 1 workbench 2, welding mechanism 3 and floating polishing mechanism 4;Welding mechanism 3 and floating polishing mechanism 4 are located above workbench 2.

[0030] Wherein, workbench 2 can be moved horizontally in each direction, i.e. workbench 2 can realize the position movement of multiple directions and multiple angles.

[0031] As Figures 1-4 shown, for welding mechanism 3, it includes the stirring drive motor (not shown due to visual obstruction) installed on base 1, main shaft 31 for transmission connection with stirring drive motor and stirring head 32 installed at the bottom of main shaft 31. Therefore, using stirring drive motor to drive stirring head 32 can realize the effect of friction stir welding. In addition, for the transmission assembly between stirring drive motor and main shaft 31, it uses existing structure.

[0032] As Figures 1-4 shown, for floating polishing mechanism 4, it includes mechanical arm 41 installed on base 1, floating connecting piece 42 installed on the output end of mechanical arm 41 and polishing assembly installed on floating connecting piece 42;Polishing assembly is located at the side of stirring head 32.

[0033] As Figures 1-4As shown, for the polishing assembly, when the stir head 32 advances in one direction of the X axis relative to the workbench 2, the mechanical arm 41 will drive the polishing assembly to move correspondingly to the position of the X axis; when the stir head 32 advances in one direction of the Y axis relative to the workbench 2, the mechanical arm 41 will drive the polishing assembly to move correspondingly to the position of the Y axis; when the stir head 32 advances in the position between the X axis and the Y axis, the mechanical arm 41 will drive the polishing assembly to move correspondingly to the position between the X axis and the Y axis. Of course, after the polishing assembly is moved to the position, the polishing assembly is kept behind the stir head 32.

[0034] In addition, in use, during the friction stir welding process of the stir head 32 on the workpiece (not shown in the figure) on the workbench 2, the position of the welding mechanism 3 is unchanged, that is, the position of the stir head 32 is unchanged, and the advancing direction of the stir head 32 relative to the workbench 2 can be changed through the movement of the workbench 2, and the control center can continuously transmit the advancing direction and angle parameters of the stir head 32 to the mechanical arm 41, so that the mechanical arm 41 can drive the polishing assembly to rotate correspondingly through the floating connecting piece 42 and keep it behind the stir head 32 when advancing, so as to continuously polish the flash, and finally achieve the purpose of removing the flash.

[0035] As shown in the figure, Figures 1-4 In this embodiment, the mechanical arm 41 is a four-axis mechanical arm 41; the mechanical arm 41 comprises a mounting seat 411 fixed on the base 1, a first arm 412 connected to the mounting seat 411 and capable of rotating horizontally, a second arm 413 connected to the first arm 412 and capable of rotating horizontally, a third arm 414 connected to the second arm 413 and capable of moving up and down, and a fourth arm 415 connected to the third arm 414 and capable of rotating; the polishing assembly is connected to the fourth arm 415 through the floating connecting piece 42. Therefore, through the above-mentioned arrangement of the mechanical arm 41, the mechanical arm 41 can realize multi-angle position adjustment by using various rotations of the first arm 412, the second arm 413, the third arm 414 and the fourth arm 415, so as to drive the polishing assembly to realize multi-angle position adjustment and ensure that the polishing assembly can be moved to the rear of the stir head 32 in time.

[0036] Specifically, the four arms of the mechanical arm 41 all use motors (not shown in the figure) as power sources. For the mechanical arm 41, a ready-made structure on the market can be used, and no further specific description is given here.

[0037] As shown in the figure, Figures 1-4As shown, specifically, the polishing assembly comprises a polishing motor 44 mounted on the floating connecting piece 42 through the support 43 and a polishing disc 45 connected to the output shaft of the polishing motor 44. Therefore, the polishing of the flash of the workpiece can be realized by driving the polishing disc 45 with the polishing motor 44 to remove the flash. In addition, the setting of the floating connecting piece 42 can make the floating polishing mechanism 4 have a certain flexibility during work, which can avoid damage to the polishing disc 45 caused by the floating polishing mechanism 4 during work. For the floating connecting piece 42, the existing product on the market can be used, and no further specific description is given here.

[0038] The utility model still includes X axis moving assembly (not marked in the drawing) and Y axis moving assembly (not marked in the drawing), workbench 2 is installed on X axis moving assembly, X axis moving assembly is installed on Y axis moving assembly. Therefore, through above-mentioned setting can make workbench 2 can realize the multidirectional movement in horizontal direction. For X axis moving assembly and Y axis moving assembly, they can adopt the mode of motor drive synchronous wheel and belt to realize corresponding action.

[0039] As shown in the figure, Figures 1-4 As shown in the figure, in the embodiment, the welding mechanism 3 further comprises a machine head 33; the machine head 33 is fixed on the base 1, and the stirring drive motor is fixed on the machine head 33. Therefore, after the machine head 33 is set on the base 1, the stirring drive motor and the stirring head 32 can be conveniently installed.

[0040] As shown in the figure, Figures 1-4 As shown in the figure, specifically, the base 1 comprises a bottom plate 11 and a gantry 12 mounted on the bottom plate 11; the workbench 2 is located on the bottom plate 11; the welding mechanism 3 and the floating polishing mechanism 4 are both located on the gantry 12. More specifically, the machine head 33 and the mounting seat 411 are respectively installed on the gantry 12. Therefore, by dividing the base 1 into the bottom plate 11 and the gantry 12, the machine head 33 and the mounting seat 411 can be conveniently positioned above the workbench 2.

[0041] In summary, the utility model discloses since polishing assembly can be adjusted to the multi-angle of mechanical arm 41, thereby let the stir head 32 of welding mechanism 3 carry out the friction stir welding of stirring in front, and mechanical arm 41 can timely follow the advancing direction adjustment position of polishing assembly according to the stir head 32 relative to workbench 2 in advancing, make polishing assembly can keep in the rear of stir head 32, like this, the flash that can be polished timely by rear polishing assembly and remove in the process of friction stir welding of stir head 32, realize the effect of removing redundant flash.In addition, since the floating polishing mechanism 4 and welding mechanism 3 of the utility model are all installed on base 1, namely, the floating polishing mechanism 4 and welding mechanism 3 are integrated on the same equipment, and the polishing assembly of floating polishing mechanism 4 can timely adjust the position according to the advancing direction of stir head 32, thereby guarantee the use effect.This design not only does not need to adopt manual polishing after welding, also does not need to set up another equipment to remove the flash of the workpiece of welding, this undoubtedly reduces the production procedure, also increases the work efficiency and reduces the processing cost.

[0042] The utility model discloses not limited to the above-mentioned implementation, if the various changes or deformation of the utility model do not deviate from the spirit and scope of the utility model, if these changes and deformation belong to the right claim and equivalent technical range of the utility model, then the utility model also intends to include these changes and deformation.

Claims

1. A friction stir welding mechanism capable of synchronous burr polishing, characterized in that: it comprises a base, a workbench, a welding mechanism and a floating polishing mechanism respectively installed on the base, the welding mechanism and the floating polishing mechanism are both located above the workbench; the workbench can move horizontally in all directions; the welding mechanism comprises a stirring drive motor installed on the base, a main shaft in transmission connection with the stirring drive motor and a stirring head installed at the bottom of the main shaft; the floating polishing mechanism comprises a mechanical arm installed on the base, a floating connecting piece installed on the output end of the mechanical arm and a polishing assembly installed on the floating connecting piece; the polishing assembly is located on one side of the stirring head; during the friction stir welding of the workpiece on the workbench by the stirring head, the advancing direction of the stirring head relative to the workbench can be changed through the movement of the workbench, and the control center can continuously transmit the advancing direction and angle parameters of the stirring head to the mechanical arm, so that the mechanical arm can drive the polishing assembly to rotate correspondingly through the floating connecting piece and keep it located behind the stirring head when advancing, so as to continuously polish the burr.

2. The friction stir welding mechanism capable of synchronous burr polishing according to claim 1, characterized in that: the mechanical arm is a four-axis mechanical arm; the mechanical arm comprises a mounting seat fixed on the base, a first arm connected to the mounting seat horizontally rotatably, a second arm connected to the first arm horizontally rotatably, a third arm connected to the second arm movably up and down, and a fourth arm connected to the third arm rotatably; the floating connecting piece is connected to the fourth arm.

3. The friction stir welding mechanism capable of synchronous burr polishing according to claim 2, characterized in that: the four arms of the mechanical arm all adopt motors as power sources.

4. The friction stir welding mechanism capable of synchronous burr polishing according to claim 1, characterized in that: the polishing assembly comprises a polishing motor installed on the floating connecting piece through a support and a polishing piece connected to the output shaft of the polishing motor.

5. The friction stir welding mechanism capable of synchronous burr polishing according to claim 1, characterized in that: it further comprises an X-axis moving assembly and a Y-axis moving assembly; the workbench is installed on the X-axis moving assembly, and the X-axis moving assembly is installed on the Y-axis moving assembly.

6. The friction stir welding mechanism capable of synchronous burr polishing according to claim 1, characterized in that: the welding mechanism further comprises a machine head; the machine head is fixed on the base, and the stirring drive motor is fixed on the machine head.

7. The friction stir welding mechanism capable of synchronous burr polishing according to claim 1, characterized in that: the base comprises a bottom plate and a gantry installed on the bottom plate; the workbench is located on the bottom plate; the welding mechanism and the floating polishing mechanism are both located on the gantry. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8. The mechanism for synchronized deburring of flash in friction stir welding as claimed in claim 1 wherein: when the stir head advances in one direction along the X-axis with respect to the work table, the mechanical arm drives the deburring assembly to move correspondingly on the X-axis; when the stir head advances in one direction along the Y-axis with respect to the work table, the mechanical arm drives the deburring assembly to move correspondingly on the Y-axis; when the stir head advances in a position between the X-axis and the Y-axis with respect to the work table, the mechanical arm drives the deburring assembly to move correspondingly in the position between the X-axis and the Y-axis.

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