A welding device for precision parts machining

Abstract

The application discloses a welding device for precision part machining and relates to the technical field of welding devices.The welding device comprises a mechanical arm and a mounting fixed block fixed to the terminal section of the mechanical arm.A connecting sleeve is mounted on the mounting fixed block, the surface of the connecting sleeve is provided with a mounting limiting buffer sleeve, a grinding wheel is mounted between two mounting seats in a connecting support, and the grinding wheel can rotate in the connecting support by cooperation of the use of a driving motor and a first transmission mechanism.When the mechanical arm drives an argon arc welding head to weld a workpiece, the grinding wheel on the connecting sleeve simultaneously contacts the same batch of workpieces on other work stations after welding and cooling, so that the welding device can simultaneously polish the workpieces after welding and cooling without the need of additional polishing equipment and stroke setting, process conversion time is saved, and the overall production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding devices, in particular to a welding device for precision part machining. BACKGROUND

[0002] In the field of modern industrial manufacturing, full-automatic argon arc welding technology is widely used in the welding of various metal workpieces due to its efficient and precise welding characteristics. It can melt and connect metal materials together under the protection of inert gas using arc energy, effectively avoiding the influence of oxygen and nitrogen in the air on the welding process, thereby obtaining high-quality welded joints with small welding deformation, which is beneficial to ensure the precision and dimensional stability of the welded parts, and plays an important role in many fields such as aerospace, shipbuilding, automobile manufacturing, and chemical industry.

[0003] However, most of the full-automatic argon arc welding machines on the market currently only have a single welding function. After completing the welding operation, the workpiece welding area often has problems such as weld protrusion and residual slag. When processing the same type of workpiece in batches, it is not possible to use one welding device to complete the welding of the workpiece and the polishing of the workpiece after welding cooling. Additional polishing equipment is needed to polish the workpiece after welding cooling, which requires setting the travel of the polishing equipment and re-setting the travel. This not only increases the processing procedures and time cost, but also requires additional space and equipment investment, reducing production efficiency.

[0004] In addition, different workpieces have different requirements for polishing after welding due to differences in shape, structure, and use requirements. For example, some flat workpieces may only need to be polished flat, while some workpieces with curved surfaces or special structures may need to be polished in the arc or vertical direction. The existing polishing equipment often cannot be flexibly adjusted according to the specific shape and requirements of the workpiece, and cannot be synchronized with the argon arc welding travel, resulting in poor polishing effect and difficulty in meeting high-precision machining requirements. SUMMARY

[0005] The present application aims to provide a welding device for precision part machining to solve the problems raised in the background.

[0006] To solve the above technical problems, the present application provides the following technical solution: a mechanical arm and a mounting fixed block fixed to the end section of the mechanical arm, the two ends of the mounting fixed block are respectively embedded with a mounting limiting sleeve and a connecting sleeve, the inside of the mounting limiting sleeve is equipped with an argon arc welding head;

[0007] The surface of the connecting sleeve is provided with a buffer sleeve, the inside of the buffer sleeve is provided with a buffer connecting column, the bottom of the buffer connecting column is fixedly connected with a connecting support, the inside of the connecting support is symmetrically provided with a mounting seat, a plurality of connecting shafts are equidistantly connected between the two mounting seats, the surface of the connecting shaft is equipped with a grinding wheel, the inside of the mounting seat is provided with a first transmission mechanism, and the inside of the connecting support is provided with a driving motor fixedly connected with the mounting seat.

[0008] The side opposite to the two mounting seats is fixedly connected with a connecting seat, the side opposite to the two connecting seats is fixedly connected with a rotating shaft connected with the connecting support, one side of the connecting support is fixedly connected with a cavity, the inside of the cavity is rotatably connected with a rotating rod, the opening groove of the cavity is provided with a connecting block, the surface of the rotating rod is provided with a threaded sliding groove, the connecting block is equipped with a protrusion slidingly connected with the threaded sliding groove, the inside of the connecting block is provided with a limiting mechanism, the inside of the connecting block is provided with a mounting groove, the inside of the mounting groove is connected with a connecting handle, and the bottom of the cavity is provided with a second transmission mechanism.

[0009] In further embodiments, the first transmission mechanism includes a transmission main shaft connected with the mounting seat, one end of the driving motor is fixedly connected with the transmission main shaft, the inside of the mounting seat is provided with a transmission large gear fixedly sleeved with the transmission main shaft, the surface of the transmission large gear is engaged with a plurality of equidistantly arranged transmission small gears, and one end of the connecting shaft penetrates into the inside of the mounting seat and is fixedly sleeved with the center of the transmission small gear.

[0010] The above technical scheme has the following advantages: when the driving motor is started, the transmission main shaft can be driven to rotate, the transmission main shaft drives the transmission large gear to rotate, the transmission large gear drives the transmission small gear to rotate, the transmission small gear drives the connecting shaft to rotate, and the connecting shaft drives the grinding wheel to rotate when the grinding wheel contacts the weld, thereby achieving the grinding work.

[0011] In further embodiments, the limiting mechanism includes a limiting seat fixedly connected to one side of the cavity opening groove, a plurality of equidistantly arranged limiting grooves are formed in the surface of the limiting seat, a transmission tooth is assembled at the rotating shaft of the connecting handle, a plug slidingly connected with the transmission tooth is arranged in the inside of the mounting groove, and the plug is connected with the limiting groove.

[0012] The above technical scheme has the following advantages: when the connecting handle is rotated, the plug can be moved in the mounting groove under the action of the transmission tooth, so that the plug can be inserted into the limiting groove on the limiting seat, thereby limiting the position of the connecting block in the opening groove of the cavity.

[0013] In a further embodiment, sliding guide grooves are symmetrically arranged in the opening groove of the cavity, and sliding guide blocks symmetrically arranged on the connecting block are in sliding connection with the sliding guide grooves.

[0014] The above technical scheme has the following advantages: the connecting block is limited when sliding in the opening groove of the cavity.

[0015] In a further embodiment, a return spring is clamped between the buffer sleeve and the buffer connecting column, sliding blocks are symmetrically arranged on the surface of the buffer connecting column, and a sliding groove in sliding connection with the sliding blocks is arranged in the interior of the buffer sleeve.

[0016] The above technical scheme has the following advantages: when the mechanical arm drives the argon arc welding head to weld the workpiece, the buffer connecting column is lowered to make the polishing wheel in the connecting support contact the weld, and the return spring can move the buffer connecting column to the interior of the buffer sleeve, so that the polishing wheel contacts the weld while preventing the polishing wheel and the weld from being damaged.

[0017] In a further embodiment, a first support seat is arranged on the surface of the connecting sleeve, and a second support seat in fixed sleeve connection with the buffer sleeve is connected to one end of the first support seat.

[0018] The above technical scheme has the following advantages: the first support seat and the second support seat can limit and fix the buffer sleeve, and the buffer sleeve is fixed on the connecting sleeve.

[0019] In a further embodiment, a rotating seat is connected to one end of the first support seat, a hydraulic cylinder is fixedly connected to the bottom of the rotating seat, and the output end of the hydraulic cylinder is hingedly connected with the buffer sleeve through a hinge piece.

[0020] The above technical scheme has the following advantages: when the extension end of the hydraulic cylinder extends to different lengths, the angle between the buffer sleeve on the second support seat and the first support seat can be adjusted.

[0021] In a further embodiment, an annular guide rail is arranged in the interior of the first support seat, and an annular guide groove in sliding connection with the annular guide rail is arranged on the surface of the connecting sleeve.

[0022] The above technical scheme has the following advantages: the first support seat can be conveniently rotated on the surface of the connecting sleeve to adjust the position of the buffer sleeve on the surface of the connecting sleeve.

[0023] In a further embodiment, a limiting bolt is screwed on the surface of the first support seat, and one end of the limiting bolt penetrates into the interior of the first support seat and cooperates with the connecting sleeve.

[0024] The above technical scheme has the following advantages: the position of the first support seat on the surface of the connecting sleeve is limited.

[0025] In further embodiments, the number of connecting shafts and polishing wheels are both four, and the outer surfaces of the four polishing wheels are shaped differently.

[0026] The above technical solution has the advantages that: the shapes of the polishing wheel surfaces are different, and different shapes of welds can be polished.

[0027] In further embodiments, the second transmission mechanism comprises a first bevel gear fixedly sleeved at one end of the rotating rod at the center thereof, a second bevel gear fixedly sleeved with the rotating shaft is engaged with the surface of the first bevel gear, and the first bevel gear and the second bevel gear are of the same size.

[0028] The above technical solution has the advantages that: when the rotating rod rotates, the first bevel gear is driven to rotate, the second bevel gear is driven to rotate by the first bevel gear, and the rotating shaft is driven to rotate.

[0029] Compared with the prior art, the present application has the advantages that:

[0030] The present application has the advantages that: the connecting sleeve is installed on the fixed block, the surface of the connecting sleeve is provided with a limiting and buffering sleeve, the connecting bracket is installed at the bottom of the buffering sleeve inside the buffering sleeve, the polishing wheel is installed between the two mounting seats in the connecting bracket, the use of the driving motor and the first transmission mechanism can drive the polishing wheel to rotate in the connecting bracket, when the mechanical arm drives the argon arc welding head to weld the workpiece, the polishing wheel on the connecting sleeve simultaneously contacts the same batch of workpieces on other workstations after welding and cooling, the welding device can simultaneously polish the workpieces after welding and cooling without the need for additional polishing equipment and stroke setting, the process conversion time is saved, and the overall production efficiency is greatly improved.

[0031] The present application has the advantages that: the connecting block is moved inside the cavity, the movement of the connecting block can drive the rotating rod to rotate inside the cavity under the action of the convex block and the threaded sliding groove, the threaded sliding groove on the rotating rod is a circle, when the connecting block moves from the topmost part to the bottommost part in the opening slot of the cavity, the rotating rod rotates one circle, the workers can move the connecting block to the appropriate position in the opening slot of the cavity according to the joint angle shape of the workpiece, the mounting seat inside the connecting seat can be rotated by the corresponding angle under the action of the rotating shaft, the positions of the polishing wheels with different outer surfaces in the two mounting seats can be adjusted, and the appropriate polishing wheel can be quickly adjusted for polishing according to the joint angle of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The present application has the advantages that: the connecting sleeve is installed on the fixed block, the surface of the connecting sleeve is provided with a limiting and buffering sleeve, the connecting bracket is installed at the bottom of the buffering sleeve inside the buffering sleeve, the polishing wheel is installed between the two mounting seats in the connecting bracket, the use of the driving motor and the first transmission mechanism can drive the polishing wheel to rotate in the connecting bracket, when the mechanical arm drives the argon arc welding head to weld the workpiece, the polishing wheel on the connecting sleeve simultaneously contacts the same batch of workpieces on other workstations after welding and cooling, the welding device can simultaneously polish the workpieces after welding and cooling without the need for additional polishing equipment and stroke setting, the process conversion time is saved, and the overall production efficiency is greatly improved.

[0033] Figure 2The exploded view of the first support seat, the second support seat and the connecting sleeve of the embodiment of the present application;

[0034] Figure 3 The partial structural section view of the embodiment of the present application;

[0035] Figure 4 The embodiment of the present application Figure 1 The enlarged view of A in the embodiment of the present application;

[0036] Figure 5 The installation schematic view of the connecting support and the connecting seat of the embodiment of the present application;

[0037] Figure 6 The partial structural schematic view of the embodiment of the present application;

[0038] Figure 7 The installation schematic view of the first transmission mechanism of the embodiment of the present application;

[0039] Figure 8 The partial structural exploded view of the embodiment of the present application;

[0040] Figure 9 The structural schematic view of the connecting block of the embodiment of the present application.

[0041] In the figure: 1, mechanical arm; 2, installation fixing block; 3, installation limiting sleeve; 4, argon arc welding head; 5, buffer sleeve; 6, buffer connecting column; 7, connecting support; 8, installation seat; 9, connecting shaft; 10, polishing wheel; 11, first transmission mechanism; 111, transmission main shaft; 112, transmission large gear; 113, transmission small gear; 12, driving motor; 13, connecting seat; 14, rotating shaft; 15, cavity; 16, limiting mechanism; 161, limiting seat; 162, limiting groove; 163, transmission tooth; 164, insertion block; 17, sliding guide block; 18, reset spring; 19, sliding block; 20, sliding groove; 21, first support seat; 22, second support seat; 23, rotating seat; 24, hydraulic cylinder; 25, annular guide rail; 26, annular guide groove; 27, limiting bolt; 28, connecting sleeve; 29, connecting block; 30, threaded sliding groove; 31, rotating rod; 32, protruding block; 33, installation groove; 34, connecting handle; 35, second transmission mechanism; 351, first bevel gear; 352, second bevel gear; 36, sliding guide groove. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0043] This embodiment discloses a welding device for precision parts processing, including a robotic arm 1 and a mounting block 2 fixed to the end section of the robotic arm 1. The two ends of the mounting block 2 are respectively embedded with a mounting limiting sleeve 3 and a connecting sleeve 28. An argon arc welding head 4 is assembled inside the mounting limiting sleeve 3. Figure 1 and Figure 2 As shown, in this application, the robotic arm 1 is used for the entire movement stroke of the equipment and can drive the argon arc welding head 4 to move according to the position where the workpiece needs to be welded. The mounting and fixing block 2 is designed at the end joint of the robotic arm 1 and is used to install and fix the mounting limit sleeve 3 and the connecting sleeve 28. The mounting limit sleeve 3 is used to install and fix the argon arc welding head 4, so that it is fixed at the end joint of the robotic arm 1. The connecting sleeve 28 is located at the other end of the mounting and fixing block 2 and can make the same stroke movement as the mounting limit sleeve 3 under the action of the mounting and fixing block 2. In this application, the workpiece clamping station adopts a dual station, one station clamps the workpiece to be welded, and the other station clamps the welded and cooled workpiece.

[0044] More specifically, the surface of the connecting sleeve 28 is provided with a buffer sleeve 5, the inside of the buffer sleeve 5 is provided with a buffer connecting post 6, the bottom of the buffer connecting post 6 is fixedly connected with a connecting bracket 7, the inside of the connecting bracket 7 is symmetrically provided with mounting seats 8, and multiple connecting shafts 9 are equidistantly connected between two mounting seats 8. The surface of the connecting shaft 9 is equipped with a grinding wheel 10, the inside of the mounting seat 8 is provided with a first transmission mechanism 11, and the inside of the connecting bracket 7 is provided with a drive motor 12 fixedly connected to the mounting seat 8, such as... Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, in the present application, the buffer connecting column 6 is installed inside the buffer sleeve 5, the buffer connecting column 6 can be retracted inside the buffer sleeve 5, the connecting bracket 7 is installed at the bottom of the buffer connecting column 6, the buffer connecting column 6 is used for installing and fixing the connecting bracket 7, two mounting seats 8 are inside the connecting bracket 7, used for mounting and fixing the connecting shaft 9, preferably the number of connecting shafts 9 is four, the four connecting shafts 9 are equally distributed between the two mounting seats 8, the connecting shaft 9 is used for mounting and fixing the grinding wheel 10, and the number of grinding wheels 10 is preferably four, the outer surfaces of the four grinding wheels 10 are different in shape, and the outer surfaces of the four grinding wheels 10 are preferably shaped as, plane, arc, outer ninety-degree angle surface and inner ninety-degree angle surface, this design can use different outer surface grinding wheels 10 for grinding according to the splicing angle of the workpiece, the first transmission mechanism 11 is designed inside the mounting seat 8, used for transmission of the connecting shaft 9, convenient to drive the connecting shaft 9 to rotate, so that the connecting shaft 9 drives the grinding wheel 10 to rotate, the driving motor 12 is used as the power source of the grinding wheel 10, the driving motor 12 can drive the first transmission mechanism 11 to rotate so that the grinding wheel 10 rotates, when the mechanical arm 1 drives the argon arc welding head 4 to weld the workpiece, the grinding wheel 10 moves to the workpiece at the grinding station at the same time, the grinding wheel 10 synchronously grinds on the weld surface along with the travel of the mechanical arm 1, which can make the welding and grinding processes be carried out at the same time, without the need to transfer the workpiece to other grinding equipment, saving the process conversion time, greatly improving the overall production efficiency, which not only reduces the processing process and time cost, without additional investment in site and equipment, increases the production efficiency.

[0045] Further, the first transmission mechanism 11 includes a transmission main shaft 111 connected with the mounting seat 8, an output end of the driving motor 12 is fixedly connected with one end of the transmission main shaft 111, the inside of the mounting seat 8 is provided with a transmission large gear 112 fixedly sleeved with the transmission main shaft 111, the surface of the transmission large gear 112 is engaged with a plurality of transmission small gears 113 arranged at equal intervals, one end of the connecting shaft 9 penetrates into the inside of the mounting seat 8 and is fixedly sleeved with the center of the transmission small gear 113, as Figure 6 and Figure 7 As shown, the transmission main shaft 111 is installed inside the mounting seat 8, and the transmission large gear 112 is fixedly sleeved on the surface of the transmission main shaft 111, the transmission small gear 113 is engaged on the surface of the transmission large gear 112, and the center of the transmission small gear 113 is fixedly sleeved with the connecting shaft 9, when the driving motor 12 starts, it can drive the transmission main shaft 111 to rotate, the transmission main shaft 111 drives the transmission large gear 112 to rotate, the transmission large gear 112 drives the transmission small gear 113 to rotate, the transmission small gear 113 drives the connecting shaft 9 to rotate, the connecting shaft 9 drives the grinding wheel 10 to rotate, when the grinding wheel 10 contacts the weld, the grinding work can be realized.

[0046] Further, the buffer sleeve 5 and the buffer connecting column 6 are clamped with the reset spring 18, the surface of the buffer connecting column 6 is symmetrically equipped with the sliding block 19, the inside of the buffer sleeve 5 is provided with the sliding groove 20 which is slidingly connected with the sliding block 19, as shown in Figure 1 and Figure 3 The sliding block 19 is equipped on the surface of the buffer connecting column 6, the sliding groove 20 is provided in the inside of the buffer sleeve 5, the sliding block 19 and the sliding groove 20 are slidingly connected, the sliding block 19 and the sliding groove 20 can slide limit the buffer connecting column 6, which is convenient for the buffer connecting column 6 to stretch and contract in the inside of the buffer sleeve 5, when the mechanical arm 1 drives the argon arc welding head 4 to weld the workpiece, the buffer sleeve 5 on the connecting sleeve 28 can drive the buffer connecting column 6 to descend at the same time, so that the polishing wheel 10 in the connecting support 7 contacts the weld of the workpiece to be polished on the other station, and through the reset spring 18, the buffer connecting column 6 can move to the inside of the buffer sleeve 5, so that the polishing wheel 10 contacts the weld at the same time, preventing the polishing wheel 10 and the weld from causing pressure loss.

[0047] Further, the surface of the connecting sleeve 28 is sleeved with the first support 21, one end of the first support 21 is connected with the second support 22 which is fixedly sleeved with the buffer sleeve 5, one end of the first support 21 is connected with the rotating seat 23, the bottom of the rotating seat 23 is fixedly connected with the hydraulic cylinder 24, the output end of the hydraulic cylinder 24 is hingedly connected with the buffer sleeve 5 through the hinge, the inside of the first support 21 is equipped with the annular guide rail 25, the surface of the connecting sleeve 28 is provided with the annular guide groove 26 which is slidingly connected with the annular guide rail 25, the surface of the first support 21 is screwed with the limiting pin 27, one end of the limiting pin 27 penetrates into the inside of the first support 21 and cooperates with the connecting sleeve 28, as shown in Figure 1 and Figure 2 The first support 21 is fixed on the connecting sleeve 28, the first support 21 is fixedly connected with the annular guide rail 25, the first support 21 can be rotationally connected with the annular guide groove 26 on the connecting sleeve 28 through the annular guide rail 25, the second support 22 is rotationally connected with the first support 21, the second support 22 can rotate on the first support 21, the first support 21 and the second support 22 can limit and fix the buffer sleeve 5, the buffer sleeve 5 is fixed on the connecting sleeve 28, when the extension end of the hydraulic cylinder 24 extends to different lengths, the buffer sleeve 5 on the second support 22 can adjust the angle of the first support 21, which is convenient for the first support 21 to rotate on the surface of the connecting sleeve 28, adjust the position of the buffer sleeve 5 on the surface of the connecting sleeve 28, and limit the position of the first support 21 on the surface of the connecting sleeve 28.

[0048] More specifically, each of the two mounting seats 8 has a connecting seat 13 fixedly connected to its opposite side. Each of the two connecting seats 13 has a rotating shaft 14 fixedly connected to its opposite side, which is rotatably connected to the connecting bracket 7. A cavity 15 is fixedly connected to one side of the connecting bracket 7. A rotating rod 31 is rotatably connected inside the cavity 15. A connecting block 29 is installed in the opening slot of the cavity 15. A threaded groove 30 is formed on the surface of the rotating rod 31. A protrusion 32 is fitted on the connecting block 29, which slidably connects to the threaded groove 30. A limit mechanism 16 is provided inside the connecting block 29. An installation groove 33 is formed inside the connecting block 29. A connecting handle 34 is rotatably connected inside the installation groove 33. A second transmission mechanism 35 is provided at the bottom of the cavity 15. Figure 1 , Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, two connecting seats 13 are installed inside the connecting bracket 7, and the two connecting seats 13 are respectively installed on opposite sides of the two mounting seats 8. The rotating shaft 14 is rotatably connected to the connecting bracket 7, and one end of the rotating shaft 14 passes through the interior of the connecting bracket 7 and is fixedly connected to the connecting seat 13. The rotating shaft 14 can rotatably fix the connecting seat 13 inside the connecting bracket 7. The cavity 15 is installed on the connecting bracket 7, and the rotating rod 31 is rotatably installed inside the cavity 15. The connecting block 29 is located inside the cavity 15. The connecting block 29 can slide inside the opening slot of the cavity 15 through the sliding guide groove 36 and the sliding guide block 17. The threaded groove 30 is designed on the surface of the rotating rod 31, and the top and bottom of the threaded groove 30 are exactly one circle of the rotating rod 31. The protrusion 32 is designed on the connecting block 29. 9 is close to one end of the rotating rod 31 and is slidably connected to the threaded groove 30. When the connecting block 29 moves inside the opening groove of the cavity 15, the rotating rod 31 rotates inside the cavity 15 under the action of the protrusion 32 and the threaded groove 30. The second transmission mechanism 35 is designed between the rotating rod 31 and the rotating shaft 14. It is used to drive the rotating shaft 14 to rotate when the rotating rod 31 rotates. When the connecting block 29 moves from the top to the bottom in the opening groove of the cavity 15, the protrusion 32 completes one revolution in the threaded groove 30, and the rotating rod 31 rotates one revolution. Since this application preferably uses four grinding wheels 10 of different shapes, and the rotating rod 31 rotates one revolution of 360 degrees, the angle between the two grinding wheels 10 is 90 degrees, so that the rotating rod 31 drives the rotating shaft 14 to rotate 90 degrees.

[0049] That is to say, when the connecting block 29 moves a quarter of the distance inside the opening slot of the cavity 15, it just makes the rotating shaft 31 rotate by 90 degrees, when the connecting block 29 is at the top of the opening slot of the cavity 15, it is the starting position, and the surface of the grinding wheel 10 is a plane, after the connecting block 29 moves a quarter of the distance inside the opening slot of the cavity 15, the rotating shaft 14 drives the two mounting seats 8 inside the two connecting seats 13 to rotate by 90 degrees, so that the grinding wheel 10 with a plane surface is adjusted and switched to the grinding wheel 10 with an arc surface, if the connecting block 29 directly moves two quarters of the distance inside the opening slot of the cavity 15, the rotating shaft 14 drives the two mounting seats 8 inside the two connecting seats 13 to rotate by 180 degrees, then the grinding wheel 10 with a plane surface is directly adjusted and switched to the grinding wheel 10 with an outer 90-degree angle surface, and the same applies, as long as the connecting block 29 is moved to the appropriate position inside the opening slot of the cavity 15, the switching and adjustment of the grinding wheel 10 with different outer surfaces can be directly completed, and the limiting mechanism 16 can limit the movement of the connecting block 29 inside the opening slot of the cavity 15, when the weld of the workpiece to be ground is a plane, an arc surface, an outer 90-degree angle surface or an inner 90-degree angle surface, the workers can quickly switch the outer surface grinding wheel 10 corresponding to the weld joint angle of the workpiece to grind, so as to avoid the difficulty of the existing grinding equipment to be flexibly adjusted according to the requirements of the workpiece.

[0050] Further, the limiting mechanism 16 comprises a limiting seat 161 fixedly connected to one side of the opening slot of the cavity 15, a plurality of limiting grooves 162 equidistantly arranged on the surface of the limiting seat 161, a transmission gear 163 assembled at the rotating shaft of the connecting handle 34, an insertion block 164 slidably connected inside the mounting groove 33 and engaged with the transmission gear 163, and the insertion block 164 is engaged with the limiting groove, as shown in Figure 1 、 Figure 4 and Figure 8 In the present application, four limiting grooves 162 are preferably arranged on the limiting seat 161, the four limiting grooves 162 correspond to the four grinding wheels 10, the mounting groove 33 is composed of a circular groove and a horizontal through groove, for mounting and fixing the connecting handle 34 and the insertion block 164, when the connecting handle 34 is rotated, the insertion block 164 is driven by the transmission gear 163 to move in the horizontal through groove of the mounting groove 33, when the insertion block 164 is engaged inside the limiting groove 162, the connecting block 29 is limited and cannot move.

[0051] Further, the second transmission mechanism 35 comprises a first bevel gear 351, the center of the first bevel gear 351 is fixedly sleeved with one end of the rotating shaft 31, and the surface of the first bevel gear 351 is engaged with a second bevel gear 352 fixedly sleeved with the rotating shaft 14, as shown in Figure 1 and Figure 4As shown, in the present application, when the rotating rod 31 rotates, the first bevel gear 351 can be driven to rotate, the first bevel gear 351 drives the second bevel gear 352 to rotate, thereby driving the rotating shaft 14 to rotate.

[0052] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that modifications, changes, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A welding device for precision parts processing, comprising a robotic arm (1) and a mounting block (2) fixed to the end section of the robotic arm (1), characterized in that: The two ends of the mounting block (2) are respectively embedded with a mounting limiting sleeve (3) and a connecting sleeve (28), and the inside of the mounting limiting sleeve (3) is equipped with an argon arc welding head (4). The surface of the connecting sleeve (28) is provided with a buffer sleeve (5), the inside of the buffer sleeve (5) is provided with a buffer connecting post (6), the bottom of the buffer connecting post (6) is fixedly connected with a connecting bracket (7), the inside of the connecting bracket (7) is symmetrically provided with mounting seats (8), and multiple connecting shafts (9) are equidistantly connected between the two mounting seats (8). The surface of the connecting shaft (9) is equipped with a grinding wheel (10), the inside of the mounting seat (8) is provided with a first transmission mechanism (11), and the inside of the connecting bracket (7) is provided with a drive motor (12) fixedly connected to the mounting seat (8). 11) Composed of a transmission main shaft (111), a transmission large gear (112) and a transmission small gear (113), the mounting base (8) is rotatably connected to the transmission main shaft (111), the output end of the drive motor (12) is fixedly connected to one end of the transmission main shaft (111), the mounting base (8) is provided with a transmission large gear (112) fixedly sleeved with the transmission main shaft (111), the surface of the transmission large gear (112) is meshed with a plurality of transmission small gears (113) arranged at equal intervals, and one end of the connecting shaft (9) penetrates into the interior of the mounting base (8) and is fixedly sleeved at the center of the transmission small gear (113); Each of the two mounting bases (8) has a connecting base (13) fixedly connected to one side facing away from the other. Each of the two connecting bases (13) has a rotating shaft (14) fixedly connected to the connecting bracket (7) on one side facing away from the other. A cavity (15) is fixedly connected to one side of the connecting bracket (7). A rotating rod (31) is rotatably connected inside the cavity (15). A connecting block (29) is provided in the opening groove of the cavity (15). A threaded groove (30) is provided on the surface of the rotating rod (31). A protrusion (32) is fitted on the connecting block (29) and slidably connected to the threaded groove (30). The connecting block (29) has a protrusion (32) inside it. The limit mechanism (16) is provided. The connecting block (29) has an installation groove (33) inside. The installation groove (33) is connected to a connecting handle (34). The bottom of the cavity (15) is provided with a second transmission mechanism (35). The second transmission mechanism (35) is composed of a first bevel gear (351) and a second bevel gear (352). The center of the first bevel gear (351) is fixedly sleeved with one end of the rotating rod (31). The first bevel gear (351) and the second bevel gear (352) mesh. The second bevel gear (352) is fixedly sleeved with the rotating shaft (14).

2. The welding apparatus for precision parts processing according to claim 1, characterized in that: The limiting mechanism (16) includes a limiting seat (161), which is fixed to one side of the opening slot of the cavity (15). The surface of the limiting seat (161) is provided with a plurality of equally spaced limiting slots (162). The shaft of the connecting handle (34) is equipped with a transmission tooth (163). The interior of the mounting slot (33) is slidably connected with a plug (164) that meshes with the transmission tooth (163). The plug (164) is engaged with the limiting slot (162).

3. The welding apparatus for precision parts processing according to claim 1, characterized in that: The cavity (15) has symmetrical sliding guide grooves (36) in the opening groove, and the connecting block (29) is symmetrically equipped with sliding guide blocks (17) that are slidably connected to the sliding guide grooves (36).

4. The welding apparatus for precision parts processing according to claim 1, characterized in that: A return spring (18) is snapped between the buffer sleeve (5) and the buffer connecting post (6). A slider (19) is symmetrically mounted on the surface of the buffer connecting post (6). A groove (20) is provided inside the buffer sleeve (5) to slide and connect with the slider (19).

5. A welding apparatus for precision parts machining according to claim 1, characterized in that: The surface of the connecting sleeve (28) is fitted with a first support seat (21), and one end of the first support seat (21) is connected to a second support seat (22) which is fixedly fitted with the buffer sleeve (5).

6. A welding apparatus for precision parts machining according to claim 5, characterized in that: One end of the first support base (21) is connected to a rotating base (23), and a hydraulic cylinder (24) is fixed to the bottom of the rotating base (23). The output end of the hydraulic cylinder (24) is hinged to the buffer sleeve (5) through a hinge.

7. A welding apparatus for precision parts machining according to claim 5, characterized in that: The first support base (21) is equipped with an annular guide rail (25) inside, and the surface of the connecting sleeve (28) is provided with an annular guide groove (26) that is slidably connected to the annular guide rail (25).

8. A welding apparatus for precision parts machining according to claim 5, characterized in that: A limit bolt (27) is screwed onto the surface of the first support base (21). One end of the limit bolt (27) extends into the interior of the first support base (21) and is used in conjunction with the connecting sleeve (28).

9. A welding apparatus for precision parts machining according to claim 1, characterized in that: The number of the connecting shaft (9) and the grinding wheel (10) are both four, and the outer surface shape of the four grinding wheels (10) is different.

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