A titanium alloy shell combined laser welding device

Abstract

The present invention relates to the field of welding processing, and specifically to a titanium alloy shell combined laser welding device, including a welding gun and a wire feeding mechanism; the wire feeding mechanism includes a shell, a wire reel and a wire feeding assembly; the wire feeding assembly includes a mounting seat, a wire feeding wheel, a wire pressing structure and an adjusting member; the mounting seat is fixed to the shell, and the wire feeding wheel is rotatably mounted on the mounting seat, and its rotation axis is parallel to the rotation axis of the wire reel; a plurality of wire feeding grooves for matching with welding wires are sequentially distributed along the axial direction on the outer peripheral wall of the wire feeding wheel; the wire pressing structure is used to press the welding wire on the wire feeding wheel downward. The axial displacement of the wire feeding wheel is adjusted by the adjusting member, and the wire feeding groove adapted to the welding wire can be switched without replacing the wire feeding wheel, and the adjusting member makes the top pressure of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted to the wire feeding groove, that is, the thicker the welding wire, the greater the top pressure of the wire pressing structure on the welding wire by the adjusting member, so as to ensure the wire feeding effect and avoid slipping during the transportation process caused by the change of the welding wire size.

Description

Technical Field

[0001] The invention relates to the field of welding processing, and in particular to a titanium alloy shell combined laser welding device. Background Art

[0002] Laser welding is a high-precision welding method suitable for thinner components or components with high requirements for welding quality, such as titanium alloy shells. During the welding process, the laser beam will melt the material of the weld in a highly concentrated manner, thereby achieving the purpose of welding. When welding the titanium alloy shell, it is necessary not only to ensure the coaxiality of the two parts to be welded of the titanium alloy shell, so as to make the weld stably docked, but also to make the laser beam and welding materials pass through the weld at a uniform speed to ensure the quality of the weld. When the laser welding machine is working, it is usually necessary to feed the welding wire evenly to the welding gun. The operator can weld the titanium alloy shell by holding the welding gun, or assemble the welding gun on the automated welding equipment, and use the equipment to drive the welding gun to move for welding. In order to ensure that the welding wire can be evenly fed to the welding gun, a wire feeding device is required. However, when the wire feeding device of the existing welding equipment is adapted to welding wires of different sizes, it is necessary to replace wire feeding wheels of different specifications, which is cumbersome to operate, and cannot adapt to the top pressure of the pressure wheel on the welding wire according to the size of the welding wire, and it is easy to slip during the wire feeding process. Summary of the invention

[0003] The invention provides a titanium alloy shell combined laser welding device to solve the problem of poor adaptability of a wire feeding device of existing welding equipment.

[0004] A titanium alloy shell combined laser welding device of the present invention adopts the following technical solution:

[0005] A titanium alloy shell combined laser welding device comprises a welding gun and a wire feeding mechanism; the wire feeding mechanism comprises a shell, a wire reel and a wire feeding assembly, and the wire reel is rotatably installed in the shell around a horizontal axis; the wire feeding assembly comprises a mounting seat, a wire feeding wheel, a wire pressing structure and an adjusting member; the mounting seat is fixed to the shell, and the wire feeding wheel is rotatably installed on the mounting seat, and its rotation axis is parallel to the rotation axis of the wire reel; a plurality of wire feeding grooves are sequentially distributed on the outer peripheral wall of the wire feeding wheel along its axial direction, and the diameters of welding wires adapted by the plurality of wire feeding grooves increase sequentially; the welding wire on the wire reel passes through the mounting seat and cooperates with the wire feeding groove on the wire feeding wheel, and then passes through the shell to be connected to the welding gun; the wire pressing structure is used to press the welding wire on the wire feeding wheel downward; the adjusting member is used to adjust the axial displacement of the wire feeding wheel, and then adjust the wire feeding groove of the wire feeding wheel used to cooperate with the welding wire; and the adjusting member makes the top pressure of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted by the wire feeding groove.

[0006] Optionally, the wire pressing structure includes a pressing wheel, a swing arm, an elastic member and a telescopic cylinder; the swing arm is rotatably mounted on a mounting seat around a horizontal axis, the pressing wheel is rotatably mounted on one end of the swing arm, and its rotation axis is parallel to the axis of the wire feeding wheel; the telescopic cylinder is fixed to the mounting seat and is located at the other end of the swing arm, and is connected to the swing arm through an elastic member; the telescopic cylinder and the elastic member are located on the lower side of the swing arm and make the other end of the swing arm tend to move upward, thereby making the end of the swing arm where the pressing wheel is mounted tend to move downward, so that the pressing wheel presses the welding wire on the wire feeding wheel.

[0007] Optionally, the wire feeding assembly also includes a driving motor and a transmission shaft, the transmission shaft is rotatably mounted on the mounting seat and rotates under the drive of the driving motor; the wire feeding wheel is axially slidably mounted on the transmission shaft and rotates synchronously with the transmission shaft; the adjusting part includes an adjusting knob, the adjusting knob is threadedly engaged with the transmission shaft, and is connected to rotate with the wire feeding wheel and move axially along the transmission shaft synchronously; the adjusting knob rotates relative to the transmission shaft to drive the wire feeding wheel to move axially along the transmission shaft, thereby changing the wire feeding groove that matches the welding wire.

[0008] Optionally, the interior of the telescopic cylinder is hollow and filled with hydraulic oil; the interior of the drive shaft is hollow and filled with hydraulic oil, an oil circuit connected to the interior of the drive shaft is opened on the adjusting knob, and the oil circuit is connected to the interior of the telescopic cylinder through a hose; when the adjusting knob rotates relative to the drive shaft and drives the wire feeding wheel to move and switch to a wire feeding groove suitable for a thicker welding wire, the hydraulic oil in the drive shaft is squeezed to flow to the telescopic cylinder, causing the telescopic cylinder to extend, thereby increasing the top pressure of the pressure wheel on the welding wire through the swing arm.

[0009] Optionally, a first conduit and a support plate are provided on the mounting seat, the first conduit is horizontally arranged, one end of which is hinged to the mounting seat, and the other end is suspended in the air; the welding wire on the wire reel detaches from the lower side of the wire reel and passes through the mounting seat through the first conduit, and in an initial state, the welding wire detached from the lower side of the wire reel and the first conduit are located in the same horizontal plane; the support plate is fixed to the mounting seat and located at the lower side of the first conduit, and is used to support the first conduit and prevent the first conduit from producing downward deformation; the telescopic cylinder is vertically arranged and the lower end is fixed to the first conduit.

[0010] Optionally, a second conduit is fixedly provided on the mounting seat, the second conduit is connected to the first conduit, the second conduit is perpendicular to the axial direction of the wire feeding wheel and is located on the upper side of the wire feeding wheel, the second conduit is disconnected on the upper side of the wire feeding wheel, and is used to guide the welding wire passing through the first conduit to cooperate with the wire feeding groove on the wire feeding wheel, and then send the welding wire out of the outer shell.

[0011] Optionally, a locking rod is also provided on the mounting seat, which is rotatably mounted on the mounting seat around a horizontal axis and is located on a side of the hinged position of the swing arm and the mounting seat away from the pressure wheel; a slot is provided on the swing arm, and the portion between the contact position between the locking rod and the lower side of the swing arm and the connection position between the locking rod and the mounting seat is an elastic and retractable structure, so that when the locking rod is rotated to cooperate with the slot, it is prompted to move upward to the contact position with the swing arm, thereby enabling the other end of the swing arm to provide pressure for the pressure wheel to press the welding wire downward.

[0012] Optionally, the adjusting member further includes a locking member, which locks the relative rotation between the adjusting knob and the transmission shaft after the adjusting knob is adjusted.

[0013] Optionally, the wire feeding wheel cooperates with the transmission shaft through a keyway along the axial direction of the transmission shaft.

[0014] Optionally, a coaxial annular groove is provided on the end face of the wire feeding wheel, and a connecting rod cooperating with the annular groove is provided on the adjusting knob, and the annular groove is a T-shaped groove, so that the connecting rod can rotate relative to the annular groove and drive the wire feeding wheel to move synchronously along the axial direction of the transmission shaft.

[0015] The beneficial effects of the present invention are: when the titanium alloy shell combined laser welding device of the present invention is in use, the appropriate wire feeding groove on the wire feeding wheel is determined according to the diameter of the welding wire, and the axial displacement of the wire feeding wheel is adjusted by the adjusting part. The wire feeding groove adapted to the welding wire can be switched without replacing the wire feeding wheel, and the adjusting part makes the top pressure of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted to the wire feeding groove, that is, the thicker the welding wire, the greater the top pressure of the wire pressing structure on the welding wire made by the adjusting part, thereby ensuring the wire feeding effect and avoiding slipping during the transportation process due to changes in the size of the welding wire.

[0016] Furthermore, since the wire feeding angle between the welding wire and the first conduit is no longer horizontal, the resistance of the wire feeding wheel to transport the welding wire will increase. By making the first conduit tilt along with the welding wire and driving the telescopic cylinder to move upward, the top pressure of the pressure wheel on the welding wire is increased, thereby ensuring the wire feeding effect of the wire feeding wheel when the wire feeding resistance increases, and further reducing the probability of slippage between the wire feeding wheel and the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a titanium alloy shell combined laser welding device of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a wire feeding mechanism in an embodiment of a titanium alloy shell combined laser welding device of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a wire feeding assembly in an embodiment of a titanium alloy shell combined laser welding device of the present invention;

[0021] Figure 4 It is a front view of a wire feeding assembly in an embodiment of a titanium alloy shell combined laser welding device of the present invention;

[0022] Figure 5 It is a cross-sectional schematic diagram of a wire feeding assembly in an embodiment of a titanium alloy shell combined laser welding device of the present invention;

[0023] In the figure: 100, housing; 200, wire reel; 300, wire feeding assembly; 310, mounting seat; 311, first guide tube; 312, support plate; 313, second guide tube; 314, locking rod; 320, wire feeding wheel; 321, wire feeding groove; 331, pressure wheel; 332, swing arm; 333, elastic member; 334, telescopic cylinder; 340, adjusting member; 341, adjusting knob; 342, locking member; 350, motor; 360, transmission shaft; 400, welding gun. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] An embodiment of a titanium alloy shell combined laser welding device of the present invention is as follows Figures 1 to 5 As shown, it includes a welding gun 400 and a wire feeding mechanism.

[0026] The wire feeding mechanism includes a housing 100, a welding wire reel 200 and a wire feeding assembly 300. The welding wire reel 200 is rotatably installed in the housing 100 around a horizontal axis.

[0027] The wire feeding assembly 300 includes a mounting seat 310, a wire feeding wheel 320, a wire pressing structure and an adjusting member 340; the mounting seat 310 is fixed to the housing 100, and the wire feeding wheel 320 is rotatably mounted on the mounting seat 310, and its rotation axis is parallel to the rotation axis of the wire reel 200. A plurality of wire feeding grooves 321 are sequentially distributed along the axial direction on the outer peripheral wall of the wire feeding wheel 320, and the diameters of the welding wires adapted by the plurality of wire feeding grooves 321 increase sequentially; the welding wire on the wire reel 200 passes through the mounting seat 310 and then matches with the wire feeding grooves 321 on the wire feeding wheel 320, and then passes through the housing 100 to be connected to the welding gun 400. The wire pressing structure is used to press the welding wire on the wire feeding wheel 320 downward. The adjusting member 340 is used to adjust the axial displacement of the wire feeding wheel 320, and then adjust the wire feeding groove 321 of the wire feeding wheel 320 to cooperate with the welding wire; and the adjusting member 340 makes the top pressure of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted by the wire feeding groove 321.

[0028] When in use, the appropriate wire feeding groove 321 on the wire feeding wheel 320 is determined according to the diameter of the welding wire, and the axial displacement of the wire feeding wheel 320 is adjusted by the adjusting member 340. The wire feeding groove 321 adapted to the welding wire can be switched without replacing the wire feeding wheel 320, and the adjusting member 340 makes the top pressure of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted by the wire feeding groove 321, that is, the thicker the welding wire, the greater the top pressure of the wire pressing structure on the welding wire by the adjusting member 340, so as to ensure the wire feeding effect and avoid slipping during the conveying process caused by the change of the welding wire size. The rotation of the wire feeding wheel 320 is used to separate the welding wire from the welding wire reel 200 and send the welding wire out of the housing 100 to the welding gun 400.

[0029] In this embodiment, the wire pressing structure includes a pressing wheel 331, a swing arm 332, an elastic member 333 and a telescopic cylinder 334; the swing arm 332 is rotatably mounted on the mounting seat 310 around a horizontal axis, and the pressing wheel 331 is rotatably mounted on the lower side of one end of the swing arm 332, and its rotation axis is parallel to the axis of the wire feeding wheel 320. The telescopic cylinder 334 is fixed to the mounting seat 310 and is located at the lower side of the other end of the swing arm 332, and is connected to the swing arm 332 through the elastic member 333; the telescopic cylinder 334 and the elastic member 333 are located at the lower side of the swing arm 332 and make the other end of the swing arm 332 tend to move upward, thereby making the end of the swing arm 332 on which the pressing wheel 331 is installed tend to move downward, so that the pressing wheel 331 presses the welding wire on the wire feeding wheel 320.

[0030] In this embodiment, the wire feeding assembly 300 further includes a driving motor 350 and a transmission shaft 360. The transmission shaft 360 is rotatably mounted on the mounting seat 310 and rotates under the drive of the driving motor 350. The mounting seat 310 limits the axial movement of the transmission shaft 360. The wire feeding wheel 320 is axially slidably mounted on the transmission shaft 360 and rotates synchronously with the transmission shaft 360. Specifically, the wire feeding wheel 320 and the transmission shaft 360 are matched through a keyway along the axial direction of the transmission shaft 360. The adjusting member 340 includes an adjusting knob 341, which is threadedly matched with the transmission shaft 360 and connected to rotate with the wire feeding wheel 320 and move axially along the transmission shaft 360 synchronously; specifically, a coaxial annular groove coaxial with the wire feeding wheel 320 is provided on the end surface of the wire feeding wheel 320, and a connecting rod matched with the annular groove is provided on the adjusting knob 341, and the annular groove is a T-shaped groove, so that the connecting rod can rotate relative to the annular groove and drive the wire feeding wheel 320 to move axially along the transmission shaft 360 synchronously. The adjusting knob 341 rotates relative to the transmission shaft 360 to drive the wire feeding wheel 320 to move axially along the transmission shaft 360, thereby changing the wire feeding groove 321 matched with the welding wire.

[0031] In this embodiment, the telescopic cylinder 334 is hollow inside and filled with hydraulic oil, and the extension of the telescopic cylinder 334 increases with the increase of the hydraulic oil inside. The transmission shaft 360 is hollow inside and filled with hydraulic oil, and the adjustment knob 341 is provided with an oil circuit connected to the inside of the transmission shaft 360, and the oil circuit is connected to the inside of the telescopic cylinder 334 through a hose; when the adjustment knob 341 rotates relative to the transmission shaft 360 and drives the wire feeding wheel 320 to move and switch the wire feeding groove 321 adapted to the thicker welding wire, the hydraulic oil in the transmission shaft 360 is squeezed to flow to the telescopic cylinder 334, causing the telescopic cylinder 334 to extend, thereby increasing the top pressure of the pressure wheel 331 on the welding wire through the elastic member 333 and the swing arm 332.

[0032] In this embodiment, a first conduit 311 and a support plate 312 are provided on the mounting seat 310. The first conduit 311 is horizontally arranged, one end of which is connected to the mounting seat 310, and the connecting part is a flexible structure, and the other end is suspended; the welding wire on the welding wire reel 200 detaches from the lower side of the welding wire reel 200 and passes through the mounting seat 310 through the first conduit 311, and in the initial state, the welding wire detached from the lower side of the welding wire reel 200 and the first conduit 311 are located in the same horizontal plane; the support plate 312 is fixed to the mounting seat 310 and is located at the lower side of the first conduit 311, and is used to support the first conduit 311 and prevent the first conduit 311 from producing downward deformation; the telescopic cylinder 334 is vertically arranged and the lower end is fixed to the first conduit 311. As the welding wire is used, the diameter of the welding wire coil on the welding wire reel 200 decreases, and the welding wire detached from the welding wire reel 200 gradually becomes higher than the first conduit 311 and drives the first conduit 311 to tilt upward, thereby driving the telescopic cylinder 334 to move upward, so that the telescopic cylinder 334 further increases the pressing force of the pressure wheel 331 on the welding wire through the elastic member 333 and the swing arm 332. When the wire feeding angle between the welding wire and the first conduit 311 is no longer horizontal, the resistance of the wire feeding wheel 320 to rotate and transport the welding wire will increase. By making the first conduit 311 tilt with the welding wire and driving the telescopic cylinder 334 to move upward to increase the pressing force of the pressure wheel 331 on the welding wire, the wire feeding effect of the wire feeding wheel 320 when the wire feeding resistance increases is ensured, and the probability of slipping between the wire feeding wheel 320 and the welding wire is further reduced.

[0033] In this embodiment, a second conduit 313 is fixedly provided on the mounting seat 310. The second conduit 313 is connected to the first conduit 311. The second conduit 313 is perpendicular to the axial direction of the wire feeding wheel 320 and is located on the upper side of the wire feeding wheel 320. The second conduit 313 is disconnected on the upper side of the wire feeding wheel 320, and is used to guide the welding wire passing through the first conduit 311 to cooperate with the wire feeding groove 321 on the wire feeding wheel 320, and then send the welding wire out of the housing 100.

[0034] In this embodiment, a locking rod 314 is also provided on the mounting base 310, and the locking rod 314 is rotatably installed on the mounting base 310 around a horizontal axis, and is located on the side of the hinged position of the swing arm 332 and the mounting base 310 away from the pressure wheel 331; a slot is provided on the swing arm 332, and the part between the contact position between the locking rod 314 and the lower side of the swing arm 332 and the connection position between the locking rod 314 and the mounting base 310 is an elastic and retractable structure, so that when the locking rod 314 is rotated to cooperate with the slot, it is prompted to move upward to the contact position with the swing arm 332, so that the other end of the swing arm 332 provides pressure for the pressure wheel 331 to press the welding wire downward. Specifically, a friction pair is provided between the locking rod 314 and the mounting seat 310 or the locking rod 314 is connected by a torsion spring, so that the locking rod 314 can maintain a state of matching with the slot, and two retaining rings are provided on the locking rod 314 along its axial interval, and the retaining ring located on the lower side contacts the lower side of the swing arm 332, and the retaining ring located on the lower side of the locking rod 314 and the part connected to the mounting seat 310 are elastic and retractable structures.

[0035] In this embodiment, the adjusting member 340 further includes a locking member 342, which locks the relative rotation of the adjusting knob 341 and the transmission shaft 360 after the adjusting knob 341 is adjusted. Specifically, the locking member 342 is a locking pin, and a locking hole is provided on the end surface of the transmission shaft 360; the adjusting knob 341 is provided with a plurality of positioning holes (not shown in the figure) around the circumference of its rotation axis, and each time the adjusting knob 341 rotates relative to the transmission shaft 360 to a positioning hole corresponding to the locking hole, the wire feeding wheel 320 moves to a wire feeding groove 321 corresponding to the second guide tube 313, and the relative rotation of the adjusting knob 341 and the transmission shaft 360 is locked by passing the locking pin through the positioning hole and the locking hole in sequence.

[0036] When the titanium alloy shell combined laser welding device of the present invention is used, the adjusting knob 341 is first rotated relative to the transmission shaft 360 to drive the wire feeding wheel 320 to move to a suitable wire feeding groove 321 corresponding to the position of the second conduit 313. During this process, the hydraulic oil in the transmission shaft 360 flows to the telescopic cylinder 334 or is sucked from the telescopic cylinder 334 to the transmission shaft 360, and the initial top pressure of the telescopic cylinder 334 is adapted to the size of the welding wire. Specifically, when the wire feeding wheel 320 moves so that the larger wire feeding groove 321 corresponds to the position of the second conduit 313, the adjusting knob 341 squeezes the hydraulic oil in the transmission shaft 360 to flow to the telescopic cylinder 334, increasing the top pressure of the telescopic cylinder 334 on the swing arm 332; otherwise, the top pressure on the swing arm 332 is reduced. After the adjustment of the wire feeding wheel 320 is completed, the relative rotation of the adjusting knob 341 and the transmission shaft 360 is locked by the locking member 342. Then, the welding wire reel 200 is loaded into the housing 100, and the welding wire is passed through the first conduit 311 and the second conduit 313 in sequence and then passed out of the housing 100, and then connected to the welding gun 400, wherein the welding wire cooperates with the corresponding wire feeding groove 321 at the interruption position of the second conduit 313. In the initial state, the height of the welding wire reel 200 is adjusted so that the welding wire separated from the lower side of the welding wire reel 200 enters the first conduit 311 in a horizontal state. Then, the locking rod 314 is rotated to cooperate with the card slot, and the elastic and retractable structure of the locking rod 314, the telescopic cylinder 334 and the elastic member 333 work together to provide a force for the pressure wheel 331 at the other end of the swing arm 332 to press the welding wire downward. When welding starts, the starting motor 350 drives the transmission shaft 360 to rotate, and the transmission shaft 360 drives the wire feeding wheel 320 to rotate. The wire feeding wheel 320 and the pressure wheel 331 squeeze the welding wire and generate relative rotation to continuously bring the welding wire out of the welding wire reel 200 and send it to the welding gun 400. As the welding wire on the wire reel 200 gradually decreases, the welding wire detached from the wire reel 200 will enter the first conduit 311 in a state inclined relative to the horizontal plane, causing the first conduit 311 to tilt upward, thereby driving the telescopic cylinder 334 thereon to move upward, further pushing one end of the swing arm 332 to move upward, causing the pressure wheel 331 at the other end of the swing arm 332 to further press the welding wire downward, thereby preventing the welding wire from being tilted and causing an increase in wire feeding resistance that affects the normal wire feeding of the wire feeding wheel 320.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A titanium alloy shell combined laser welding device, characterized in that: Includes welding gun and wire feeding mechanism; The wire feeding mechanism comprises a housing, a welding wire reel and a wire feeding assembly, wherein the welding wire reel is installed in the housing to rotate around a horizontal axis; The wire feeding assembly comprises a mounting seat, a wire feeding wheel, a wire pressing structure and an adjusting member; the mounting seat is fixed to the housing, the wire feeding wheel is rotatably mounted on the mounting seat, and its rotation axis is parallel to the rotation axis of the wire reel; a plurality of wire feeding grooves are sequentially distributed on the outer peripheral wall of the wire feeding wheel along its axial direction, and the diameters of welding wires adapted by the plurality of wire feeding grooves increase sequentially; the welding wire on the welding wire reel passes through the mounting seat and matches with the wire feeding groove on the wire feeding wheel, and then passes through the housing to be connected to the welding gun; the wire pressing structure is used to press the welding wire on the wire feeding wheel downward; the adjusting member is used to adjust the axial displacement of the wire feeding wheel, and then adjust the wire feeding groove of the wire feeding wheel used to match the welding wire; and the adjusting member makes the pressing force of the wire pressing structure on the welding wire positively correlated with the diameter of the welding wire adapted by the wire feeding groove; The wire pressing structure includes a pressing wheel, a swing arm, an elastic member and a telescopic cylinder; the swing arm is rotatably mounted on a mounting seat around a horizontal axis, the pressing wheel is rotatably mounted on one end of the swing arm, and its rotation axis is parallel to the axis of the wire feeding wheel; the telescopic cylinder is fixed to the mounting seat and is located at the other end of the swing arm, and is connected to the swing arm through an elastic member; the telescopic cylinder and the elastic member are located at the lower side of the swing arm and make the other end of the swing arm tend to move upward, thereby making the end of the swing arm where the pressing wheel is mounted tend to move downward, so that the pressing wheel presses the welding wire on the wire feeding wheel; The wire feeding assembly also includes a driving motor and a transmission shaft, the transmission shaft is rotatably mounted on the mounting seat and rotates under the drive of the driving motor; the wire feeding wheel is slidably mounted on the transmission shaft along the axial direction of the transmission shaft and rotates synchronously with the transmission shaft; the adjusting member includes an adjusting knob, the adjusting knob is threadedly matched with the transmission shaft, and is connected to rotate with the wire feeding wheel and move synchronously along the axial direction of the transmission shaft; the adjusting knob rotates relative to the transmission shaft to drive the wire feeding wheel to move axially along the transmission shaft, thereby changing the wire feeding groove matched with the welding wire; The interior of the telescopic cylinder is hollow and filled with hydraulic oil; the interior of the drive shaft is hollow and filled with hydraulic oil, an oil circuit connected to the interior of the drive shaft is opened on the adjusting knob, and the oil circuit is connected to the interior of the telescopic cylinder through a hose; when the adjusting knob rotates relative to the drive shaft and drives the wire feeding wheel to move and switch the wire feeding groove suitable for thicker welding wire, the hydraulic oil in the drive shaft is squeezed to flow to the telescopic cylinder, causing the telescopic cylinder to extend, and then the top pressure of the pressure wheel on the welding wire is increased through the swing arm.

2. The titanium alloy shell combined laser welding device according to claim 1 is characterized in that: A first conduit and a support plate are provided on the mounting seat, wherein the first conduit is horizontally arranged, one end of which is hinged to the mounting seat, and the other end is suspended in the air; the welding wire on the welding wire reel detaches from the lower side of the welding wire reel and passes through the mounting seat through the first conduit, and in an initial state, the welding wire detached from the lower side of the welding wire reel and the first conduit are located in the same horizontal plane; the support plate is fixed to the mounting seat and located at the lower side of the first conduit, and is used to support the first conduit and prevent the first conduit from producing downward deformation; the telescopic cylinder is vertically arranged and the lower end is fixed to the first conduit.

3. The titanium alloy shell combined laser welding device according to claim 2 is characterized in that: A second conduit is also fixedly arranged on the mounting seat, the second conduit is connected with the first conduit, the second conduit is perpendicular to the axial direction of the wire feeding wheel and is located on the upper side of the wire feeding wheel, the second conduit is disconnected on the upper side of the wire feeding wheel, and is used to guide the welding wire passing through the first conduit to cooperate with the wire feeding groove on the wire feeding wheel, and then send the welding wire out of the shell.

4. The titanium alloy shell combined laser welding device according to claim 1, characterized in that: A locking rod is also provided on the mounting seat, which is rotatably installed on the mounting seat around a horizontal axis and is located on a side of the hinged position of the swing arm and the mounting seat away from the pressure wheel; a slot is provided on the swing arm, and the portion between the contact position between the locking rod and the lower side of the swing arm and the connection position between the locking rod and the mounting seat is an elastic and retractable structure, so that when the locking rod is rotated to cooperate with the slot, it is prompted to move upward to the contact position with the swing arm, thereby causing the other end of the swing arm to provide pressure for the pressure wheel to press the welding wire downward.

5. The titanium alloy shell combined laser welding device according to claim 1, characterized in that: The adjusting member also includes a locking member, which locks the relative rotation of the adjusting knob and the transmission shaft after the adjusting knob is adjusted.

6. The titanium alloy shell combined laser welding device according to claim 1, characterized in that: The wire feeding wheel and the transmission shaft are matched through a keyway along the axial direction of the transmission shaft.

7. The titanium alloy shell combined laser welding device according to claim 1 is characterized in that: An annular groove coaxial with the wire feeding wheel is provided on the end face of the wire feeding wheel, and a connecting rod cooperating with the annular groove is provided on the adjusting knob, and the annular groove is a T-shaped groove, so that the connecting rod can rotate relative to the annular groove and drive the wire feeding wheel to move synchronously along the axial direction of the transmission shaft.

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