Single welding point laser welding equipment and use method

Abstract

The present invention provides a single-weld spot laser welding device and a method for using the device, which solves the problem of poor laser welding effect, and includes a rotating worktable, a working panel is fixed on the rotating worktable, the working panel has a plurality of welding stations symmetrical relative to its center and extending outward, and the welding stations are respectively installed with fixture positioning components, the rotating worktable is equipped with a lifting and rotating cylinder located below the welding station, and a C-shaped mounting frame that can be rotated and lifted relative to the welding station is connected to the output end above the lifting and rotating cylinder, and a downwardly extending pressing strip is arranged at the upper end of the C-shaped mounting frame, and the pressing strip is opposite to the welding piece fixed on the welding station and a rotating pressing head is fixed at the end, and a laser welding gun is arranged above the welding station. The present invention has the advantages of good welding effect and high work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of laser welding, and in particular relates to a single-welding-point laser welding device and a use method thereof. Background Art

[0002] Laser welding can be achieved with a continuous or pulsed laser beam. The principle of laser welding can be divided into heat conduction welding and laser deep penetration welding. The principle of heat conduction laser welding is: laser radiation heats the surface to be processed, and the surface heat diffuses to the inside through heat conduction. By controlling the laser parameters such as the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Laser deep penetration welding generally uses a continuous laser beam to complete the connection of materials. Its metallurgical physical process is very similar to electron beam welding, that is, the energy conversion mechanism is completed through a "small hole" structure. However, the laser sealing equipment currently used mainly uses a multi-welding point method for welding. The welding effect is not beautiful and the weld is prone to cracking. At the same time, the welding gun will move at an uneven speed along the welding path during welding, resulting in uneven heating of the welded parts and causing product welding deformation.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a multi-station welding workbench for a laser welding machine [202011517155.4], which includes a laser welding machine body, a fixed frame is provided on one side of the laser welding machine body, an intermittent feeding mechanism is provided on the fixed frame, a combined clamping mechanism is provided on the intermittent feeding mechanism, and a mechanical arm is provided on one side of the intermittent feeding mechanism. The workpiece to be welded is placed in the mold, the combined clamping mechanism is controlled to position and clamp the workpiece, the intermittent feeding mechanism is controlled to move, and the combined workpiece to be welded is moved to the lower part of the welding head of the laser welding machine body to perform welding operations. After the welding is completed, the intermittent feeding mechanism is controlled to move the next workpiece to be welded into the laser welding machine body, and the combined clamping mechanism is controlled to release the restriction on the finished workpiece, and the finished workpiece is removed by the mechanical arm.

[0004] The above solution solves the problem of uneven heating of welded parts that may cause deformation to a certain extent, but the solution still has many shortcomings, such as the welded parts having multiple welding points, resulting in poor welding effect. Summary of the invention

[0005] The purpose of the present invention is to provide a single welding spot laser welding device with reasonable design and good welding effect in view of the above problems.

[0006] Another object of the present invention is to provide a method for using a single-weld-spot laser welding device that ensures welding quality in order to solve the above-mentioned problem.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: the single-weld spot laser welding equipment includes a rotating worktable, a working panel is fixed on the rotating worktable, the working panel has a number of welding stations that are symmetrical relative to its center and extend outward, and the welding stations are respectively installed with fixture positioning components, the rotating worktable is equipped with a lifting and rotating cylinder located below the welding station, and a C-shaped mounting frame that can be rotated and lifted relative to the welding station is connected to the output end above the lifting and rotating cylinder, and a downwardly extending clamping strip is arranged at the upper end of the C-shaped mounting frame, and the clamping strip is opposite to the welding piece fixed on the welding station and a rotating pressing head is fixed at the end, and a laser welding gun is arranged above the welding station. The fixture positioning component fixes the welding piece placed on the welding station, cooperates with the C-shaped mounting frame to provide vertical clamping force, does not block the welding edge of the welding piece during welding, and single-weld spot welding improves the welding effect.

[0008] In the above-mentioned single-weld spot laser welding equipment, the fixture positioning assembly includes an L-shaped limit block fixed above the welding station, the inner side of the L-shaped limit block is in contact with the welded part and opposite to the center of the working panel, and a number of pen-shaped cylinders are installed above the working panel, the output ends of the pen-shaped cylinders are opposite to the L-shaped limit block and are respectively fixed with clamping blocks, and the clamping blocks are in contact with the side of the welded part under the drive of the pen-shaped cylinder. The L-shaped limit block and the clamping block cooperate to clamp and fix the welded part in the horizontal direction.

[0009] In the above-mentioned single-weld spot laser welding equipment, an L-shaped airflow main circuit is arranged above the center of the working panel, and an airflow distribution pipeline assembly communicating with the interior is arranged on the vertical pipe of the L-shaped airflow main circuit, and a plurality of air outlet interfaces symmetrical to the center and connected to the pen-shaped cylinder are arranged on the side of the airflow distribution pipeline assembly, and airflow control valves are arranged between the air outlet interfaces and the pen-shaped cylinder, respectively, and a fixed angle bracket is arranged on the horizontal pipe of the L-shaped airflow main circuit. The working panel is cross-shaped and has four welding stations, and an angled surface is arranged at the intersection of the welding stations. The L-shaped airflow main circuit and the airflow distribution pipeline assembly supply air to the pen-shaped cylinder, and the airflow control valve independently controls the clamping force of the clamping block, and the working panel rotates to realize the automatic displacement of the welded parts.

[0010] In the above-mentioned single-weld spot laser welding equipment, the local thickness of the intersection of the horizontal pipe and the vertical pipe of the L-shaped airflow main circuit is increased, the horizontal pipe of the L-shaped airflow main circuit is connected to the air intake pipe installed with the air intake interface, the inner diameters of the vertical pipe, horizontal pipe and air intake pipe of the L-shaped airflow main circuit are reduced one by one, the fixed angle bracket is triangular and has a fixed hole in the center for the air intake pipe to pass through, and the fixed angle bracket is set at the intersection of the horizontal pipe and the air intake pipe. The L-shaped airflow main circuit can withstand a large flow rate and meet the air supply requirements of multiple air outlet interfaces of the airflow distribution pipeline assembly.

[0011] In the above-mentioned single-weld spot laser welding equipment, the rotating worktable includes a supporting base and a fixed base fixed on the supporting base, a fixed protrusion is arranged on the supporting base, a fixed groove plugged with the fixed protrusion is arranged below the fixed base, a positioning circular groove engaged with the fixed base is arranged below the middle of the working panel, and a plurality of rotor installation grooves symmetrical with respect to the center are arranged in the fixed base. The rotating worktable has a large volume inside for installing the rotating drive device, which does not affect the normal rotation of the upper working panel.

[0012] In the above-mentioned single-weld spot laser welding equipment, the rotary pressing head includes a pressing block fixed at the lower end of the pressing strip, and the pressing block is covered with a pressing sleeve, which is truncated and has a pressing groove on the top for the pressing block to engage. The pressing sleeve is elastic and presses on the welded part to ensure its vertical fixation stability.

[0013] In the above-mentioned single-weld spot laser welding equipment, the C-type mounting frame includes a rotating column connected to the output end of the lifting and rotating cylinder, a lower horizontal bar arranged horizontally and located below the welding station is connected above the rotating column, a vertical vertical bar is connected above the end of the lower horizontal bar, an upper horizontal bar parallel to the lower horizontal bar is connected to the upper end of the vertical bar, and the welding station is set between the lower horizontal bar and the upper horizontal bar. The C-type mounting frame is a vertical frame structure, which can rotate relative to the welded part without affecting the normal displacement of the laser welding gun.

[0014] The method for using the above-mentioned single-weld spot laser welding equipment includes the following steps:

[0015] S1. The welded part is placed on the welding station of the working panel and fits with the inner side of the L-shaped limit block. The L-shaped airflow path provides a driving force for the pen-shaped cylinder. The clamping block at the output end of the pen-shaped cylinder clamps the welded part between the clamping block and the L-shaped limit block.

[0016] S2. The rotary table and the work panel rotate, and each welding station moves to the top of the lifting rotary cylinder in turn. The output end of the lifting rotary cylinder drives the C-type mounting frame to descend, and the rotary pressing head on the upper end of the C-type mounting frame descends accordingly, keeping the weldment fixed in the vertical direction, and the laser welding gun welds the weldment;

[0017] S3. After welding is completed, the C-type mounting frame rises, and the working panel rotates to move the weldment fixed on another welding station to the top of the lifting and rotating cylinder. The output end of the pen-shaped cylinder where the weldment where the welding work is completed is located shrinks, and the weldment is removed and a new weldment is placed.

[0018] In the above-mentioned method for using the single-weld spot laser welding equipment, in step S1, the L-shaped airflow main circuit is connected to the external air supply device and fixed in relative position by a fixed angle bracket. The airflow distribution pipeline assembly on the L-shaped airflow main circuit has eight air outlet interfaces, and the airflow control valve between the air outlet interface and the pen-shaped cylinder is relatively independent. When the welding station of the working panel is rotated to the top of the lifting and rotating cylinder, the corresponding airflow control valve controls the clamping strip to loosen, which is convenient for removing the welded parts.

[0019] In the above-mentioned method for using the single-weld-point laser welding equipment, in step S3, the C-type mounting frame rotates with the laser welding gun during the welding process under the drive of the lifting and rotating cylinder, and the laser welding gun and the C-type mounting frame do not collide. After the laser welding gun is completed, it is lifted and the C-type mounting frame is reset. The C-type mounting frame rotates with the movement of the laser welding gun, and there is only one welding point in the entire welding process, thereby improving the welding quality.

[0020] Compared with the existing technology, the advantages of the present invention are: only one welding point is produced during welding, thereby improving the welding quality of the welded parts; multi-directional positioning clamping has good clamping stability; the rotation of the working panel realizes the automatic displacement of the welded parts fixed on the welding station, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the working panel of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the lifting and rotating cylinder of the present invention;

[0024] Figure 4 is an assembly cross-sectional view of the rotary table of the present invention;

[0025] In the figure, a rotating workbench 1, a supporting base 11, a fixed base 12, a fixed protrusion 13, a fixed groove 14, a positioning circular groove 15, a rotor mounting groove 16, a working panel 2, a welding station 21, an L-shaped air flow main circuit 22, a vertical pipe 23, a horizontal pipe 24, an air inlet pipe 25, an air outlet interface 26, an air inlet interface 27, an air flow distribution pipeline assembly 28, a fixed angle bracket 29, a fixture positioning component 3, an L-shaped limit block 31, a pen-shaped cylinder 32, a clamping block 33, a lifting and rotating cylinder 4, a C-shaped mounting frame 5, a clamping bar 51, a rotating column 52, a lower horizontal bar 53, a vertical bar 54, an upper horizontal bar 55, a welding part 6, a rotating pressing head 7, a pressing block 71, a clamping sleeve 72, a pressing groove 73, and a laser welding gun 8. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-4 As shown, the single-weld-spot laser welding equipment comprises a rotating worktable 1, on which a working panel 2 is fixed, the working panel 2 has a plurality of welding stations 21 which are symmetrical relative to the center and extend outward, and the welding stations 21 are respectively provided with fixture positioning components 3, the rotating worktable 1 is equipped with a lifting and rotating cylinder 4 located below the welding station 21, and a C-shaped mounting frame 5 which can be rotated and lifted relative to the welding station 21 is connected to the output end above the lifting and rotating cylinder 4, and a downwardly extending clamping strip 51 is arranged at the upper end of the C-shaped mounting frame 5, the clamping strip 51 is opposite to the welding piece 6 fixed on the welding station 21 and a rotating pressing head 7 is fixed at the end, and a laser welding gun 8 is arranged above the welding station 21. The rotating workbench 1 is driven by a rotating motor to drive the working panel 2 to rotate. The welding stations 21 on the working panel 2 are respectively fixed with welding parts 6 through the clamp positioning components 3. The welding parts 6 rotate accordingly and are welded one by one by the laser welding gun 8. During welding, the C-type mounting frame 5 drives the rotating pressing head 7 at the lower end of the clamping strip 51 to clamp and fix the welding parts 6. The C-type mounting frame 5 rotates with the movement of the laser welding gun 8. Only one welding point is left on the welding part 6 to ensure that the weld edge is not easy to break.

[0028] Specifically, the fixture positioning assembly 3 includes an L-shaped limit block 31 fixed above the welding station 21, the inner side of the L-shaped limit block 31 is in contact with the welding piece 6 and is opposite to the center of the working panel 2, and a plurality of pen-shaped cylinders 32 are installed above the working panel 2, and the output ends of the pen-shaped cylinders 32 are opposite to the L-shaped limit block 31 and are respectively fixed with clamping blocks 33, and the clamping blocks 33 are in contact with and clamped with the side of the welding piece 6 under the drive of the pen-shaped cylinders 32. The L-shaped limit block 31 is arranged above the welding station 21 of the working panel 2, and the clamping block 33 of the pen-shaped cylinder 32 is opposite to the inner side of the L-shaped limit block 31, and the welding piece 6 is clamped and fixed between the clamping block 33 and the L-shaped limit block 31, and the welding piece 6 includes a cavity and a cover, and the cavity is clamped and fixed by the clamping block 33.

[0029] Deep down, an L-shaped airflow main circuit 22 is arranged above the center of the working panel 2, and an airflow distribution pipe assembly 28 connected to the interior is arranged on the vertical pipe 23 of the L-shaped airflow main circuit 22, and a plurality of air outlet interfaces 26 symmetrical with respect to the center and connected to the pen-shaped cylinder 32 are arranged on the side of the airflow distribution pipe assembly 28, and airflow control valves are respectively arranged between the air outlet interfaces 26 and the pen-shaped cylinder 32, and a fixed angle bracket 29 is arranged on the horizontal pipe 24 of the L-shaped airflow main circuit 22. The working panel 2 is cross-shaped and has four welding stations 21, and angle surfaces are arranged at the intersections of the welding stations 21. The vertical pipe 23 of the L-shaped air flow main circuit 22 is opposite to the center of the working panel 2. The position of the L-shaped air flow main circuit 22 is fixed by the fixed angle bracket 29. The air flow control valve between the air flow distribution pipeline assembly 28 and the pen-shaped cylinder 32 is relatively independent. Under normal conditions, it will prevent the welding part 6 on the welding station 21 from being clamped and fixed. After welding is completed, the air flow control valve controls the pen-shaped cylinder 32 to release the clamping block 33, and the robot takes out the welding part 6 and puts in a new welding part 6, thereby realizing continuous automatic welding of the welding part 6.

[0030] Furthermore, the local thickness of the intersection of the transverse tube 24 and the vertical tube 23 of the L-shaped airflow main path 22 is increased, the transverse tube 24 of the L-shaped airflow main path 22 is connected to the air intake pipe 25 with the air intake interface 27 installed, the inner diameters of the vertical tube 23, the transverse tube 24 and the air intake pipe 25 of the L-shaped airflow main path 22 are reduced one by one, the fixed angle bracket 29 is triangular and has a fixed hole in the center for the air intake pipe 25 to pass through, and the fixed angle bracket 29 is arranged at the intersection of the transverse tube 24 and the air intake pipe 25. The inner diameter of the L-shaped airflow main path 22 near the airflow distribution pipeline assembly 28 is larger to ensure the airflow flow at each air outlet interface 26, and the local thickness of the vertical tube 23 and the transverse tube 24 bend is increased, which helps to improve the structural strength of the L-shaped airflow main path 22.

[0031] Furthermore, the rotating table 1 includes a supporting base 11 and a fixed base 12 fixed on the supporting base 11, a fixed protrusion 13 is arranged on the supporting base 11, a fixed groove 14 plugged with the fixed protrusion 13 is arranged below the fixed base 12, a positioning circular groove 15 engaged with the fixed base 12 is arranged below the middle of the working panel 2, and a plurality of rotor mounting grooves 16 symmetrical relative to the center are arranged in the fixed base 12. The fixed base 12 is fixedly connected to the supporting base 11 by screws, and the positioning circular groove 15 below the working panel 2 keeps the relative position of the rotating table 1 and the working panel 2 fixed.

[0032] In addition, the rotary pressing head 7 includes a pressing block 71 fixed to the lower end of the pressing strip 51, and the pressing block 71 is covered with a pressing sleeve 72. The pressing sleeve 72 is truncated and has a pressing groove 73 on the top for the pressing block 71 to engage. The pressing block 71 in the rotary pressing head 7 is connected to the C-shaped mounting frame 5 as a whole, and is covered with a pressing sleeve 72 on the outside. When pressing and fixing, a large pre-tightening force can be applied to prevent the cavity and cover of the weldment 6 from being misaligned and loosened during welding.

[0033] Meanwhile, the C-type mounting frame 5 includes a rotating column 52 connected to the output end of the lifting and rotating cylinder 4, a lower horizontal bar 53 arranged horizontally and located below the welding station 21 is connected above the rotating column 52, a vertical vertical bar 54 is connected above the end of the lower horizontal bar 53, an upper horizontal bar 55 parallel to the lower horizontal bar 53 is connected to the upper end of the vertical bar 54, and the welding station 21 is arranged between the lower horizontal bar 53 and the upper horizontal bar 55. The C-type mounting frame 5 is arranged outside the welding station 21 and rotates relative to it, and does not affect the movement of the laser welding gun 8 during the rotation process. The laser welding gun 8 moves downward to start welding and moves along the welding edge, and does not collide with the C-type mounting frame 5 during the welding process. Finally, the output end of the laser welding gun 8 is lifted up after reaching the initial welding point to complete the welding.

[0034] The method for using the single-weld spot laser welding equipment comprises the following steps: a welding piece 6 is placed on a welding station 21 of a working panel 2 and is fitted with the inner side of an L-shaped limit block, the L-shaped airflow main path 22 provides a driving force for a pen-shaped cylinder 32, and a clamping block 33 at an output end of the pen-shaped cylinder 32 clamps and fixes the welding piece 6 between the clamping block 33 and the L-shaped limit block; the rotating worktable 1 and the working panel 2 rotate, and each welding station 21 moves to the top of the lifting and rotating cylinder 4 in turn, and the output end of the lifting and rotating cylinder 4 drives the C-shaped mounting frame 5 to descend, and the rotating pressing head 7 at the upper end of the C-shaped mounting frame 5 descends accordingly, keeping the welding piece 6 fixed in the vertical direction, and the laser welding gun 8 welds the welding piece 6; after welding is completed, the C-shaped mounting frame 5 rises, and the working panel 2 rotates to move the welding piece 6 fixed on another welding station 21 to the top of the lifting and rotating cylinder 4, and the output end of the pen-shaped cylinder 32 where the welding piece 6 that has completed the welding work is located shrinks, and the welding piece 6 is removed and a new welding piece 6 is placed. The laser welding gun 8 is driven by a mechanical arm to move, and can weld from multiple angles but ensure that there is a welding spot. The welding station 21 is set above the lifting and rotating cylinder 4. When the corresponding sensing element senses the welding part 6, the C-shaped mounting frame 5 starts to rotate, and the laser welding gun 8 then welds.

[0035] It can be seen that the L-shaped air flow main circuit 22 is connected to the external air supply device and the relative position is fixed by the fixed angle bracket 29. The air flow distribution pipeline assembly 28 on the L-shaped air flow main circuit 22 has eight air outlet interfaces 26. The air flow control valve between the air outlet interfaces 26 and the pen-shaped cylinder 32 is relatively independent. The air flow control valve controls the extension and contraction of the pen-shaped cylinder 32 to realize the reciprocating motion of the clamping block 33.

[0036] Obviously, when the laser welding gun 8 is in the welding process, the C-type mounting frame 5 is driven by the lifting and rotating cylinder 4 to rotate, and the laser welding gun 8 does not collide with the C-type mounting frame 5. After the laser welding gun 8 is completed, it is lifted and the C-type mounting frame 5 is reset. The lifting and rotating cylinder 4 of the C-type mounting frame 5 is arranged below the welding station 21, leaving sufficient space above the welding station 21 for the laser welding gun 8 to move.

[0037] To sum up, the principle of this embodiment is that the rotating worktable 1 drives the working panel 2 to rotate, so that the welding stations 21 of the working panel 2 move one by one to the bottom of the laser welding gun 8 for welding. During the welding process, the clamping strip 51 of the C-type mounting frame 5 clamps and fixes the welding part 6 in the vertical direction, and the C-type mounting frame 5 rotates with the movement of the laser welding gun 8, so that only one welding point is left on the welding part 6.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0039] Although the present invention uses more terms such as rotating worktable 1, supporting base 11, fixed base 12, fixed protrusion 13, fixed groove 14, positioning circular groove 15, rotor mounting groove 16, working panel 2, welding station 21, L-shaped air flow main path 22, vertical pipe 23, horizontal pipe 24, air inlet pipe 25, air outlet interface 26, air inlet interface 27, air flow distribution pipeline assembly 28, fixed angle bracket 29, fixture positioning assembly 3, L-shaped limit block 31, pen-shaped cylinder 32, clamping block 33, lifting and rotating cylinder 4, C-shaped mounting frame 5, pressing bar 51, rotating column 52, lower horizontal bar 53, vertical bar 54, upper horizontal bar 55, welding part 6, rotating pressing head 7, pressing block 71, pressing sleeve 72, pressing groove 73, laser welding gun 8, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A single-weld-spot laser welding device, comprising a rotating worktable (1), a working panel (2) being fixed on the rotating worktable (1), the working panel (2) having a plurality of welding stations (21) symmetrically arranged relative to the center and extending outward, the welding stations (21) being respectively provided with fixture positioning components (3), characterized in that: The rotary workbench (1) is equipped with a lifting rotary cylinder (4) located below the welding station (21); the upper output end of the lifting rotary cylinder (4) is connected to a C-shaped mounting frame (5) that can be rotated and lifted relative to the welding station (21); the upper end of the C-shaped mounting frame (5) is provided with a downwardly extending pressing strip (51); the pressing strip (51) is opposite to a welding piece (6) fixed on the welding station (21) and a rotating pressing head (7) is fixed at the end; a laser welding gun (8) is provided above the welding station (21); the fixture positioning assembly (3) comprises an L-shaped limit block (31) fixed above the welding station (21); the inner side of the L-shaped limit block (31) The working panel (2) is fitted with the welding piece (6) and is opposite to the center of the working panel (2). A plurality of pen-shaped cylinders (32) are installed above the working panel (2). The output ends of the pen-shaped cylinders (32) are opposite to the L-shaped limit blocks (31) and are respectively fixed with clamping blocks (33). The clamping blocks (33) are fitted with the side of the welding piece (6) under the drive of the pen-shaped cylinders (32). An L-shaped airflow main path (22) is arranged above the center of the working panel (2). An airflow distribution pipeline assembly (28) communicating with the interior is arranged on the vertical pipe (23) of the L-shaped airflow main path (22). A plurality of symmetrical airflow distribution pipelines (28) are arranged on the side of the airflow distribution pipeline assembly (28) relative to the center thereof and connected to the pen-shaped cylinders (32). An air outlet interface (26), an air flow control valve is respectively arranged between the air outlet interface (26) and the pen-shaped cylinder (32), a fixed angle bracket (29) is arranged on the transverse pipe (24) of the L-shaped air flow main path (22), the working panel (2) is cross-shaped and has four welding stations (21), and an angled surface is arranged at the intersection of the welding stations (21); the rotating workbench (1) comprises a supporting base (11) and a fixed base (12) fixed above the supporting base (11), a fixed protrusion (13) is arranged above the supporting base (11), and a fixed groove (14) plugged into the fixed protrusion (13) is arranged below the fixed base (12), and the working panel (2) A positioning circular groove (15) engaged with the fixed base (12) is provided at the lower middle part, and a plurality of rotor mounting grooves (16) symmetrical with respect to the center thereof are provided in the fixed base (12); the C-shaped mounting frame (5) comprises a rotating column (52) connected to the output end of the lifting and rotating cylinder (4), a lower horizontal bar (53) arranged horizontally and located below the welding station (21) is connected above the rotating column (52), a vertical vertical bar (54) is connected above the end of the lower horizontal bar (53), an upper horizontal bar (55) parallel to the lower horizontal bar (53) is connected at the upper end of the vertical bar (54), and the welding station (21) is arranged between the lower horizontal bar (53) and the upper horizontal bar (55).

2. The single-weld-spot laser welding equipment according to claim 1, characterized in that: The thickness of the local junction of the transverse tube (24) and the vertical tube (23) of the L-shaped air flow main path (22) is increased, the transverse tube (24) of the L-shaped air flow main path (22) is connected to an air intake pipe (25) on which an air intake interface (27) is installed, the inner diameters of the vertical tube (23), the transverse tube (24) and the air intake pipe (25) of the L-shaped air flow main path (22) are gradually reduced, the fixed angle bracket (29) is triangular in shape and has a fixing hole in the center for the air intake pipe (25) to pass through, and the fixed angle bracket (29) is arranged at the junction of the transverse tube (24) and the air intake pipe (25).

3. The single-weld-spot laser welding equipment according to claim 1, characterized in that: The rotary pressing head (7) comprises a pressing block (71) fixed to the lower end of the pressing strip (51), the pressing block (71) being covered with a pressing sleeve (72), the pressing sleeve (72) being truncated and having a pressing groove (73) on the upper side for the pressing block (71) to engage.

4. The method for using the single-weld-spot laser welding equipment according to any one of claims 1 to 3, characterized in that: The steps include: S1, the weldment (6) is placed on the welding station (21) of the working panel (2) and is in contact with the inner side of the L-shaped limit block, the L-shaped air flow path (22) provides a driving force for the pen-shaped cylinder (32), and the clamping block (33) at the output end of the pen-shaped cylinder (32) clamps and fixes the weldment (6) between the clamping block (33) and the L-shaped limit block; S2, the rotating worktable (1) and the working panel (2) rotate, and each welding station (21) moves to the top of the lifting rotary cylinder (4) in turn, and the output end of the lifting rotary cylinder (4) drives the C-shaped mounting frame (5) to descend, and the rotating pressing head (7) at the upper end of the C-shaped mounting frame (5) descends accordingly, keeping the weldment (6) fixed in the vertical direction, and the laser welding gun (8) welds the weldment (6); S3. After welding is completed, the C-shaped mounting frame (5) rises, and the working panel (2) rotates to move the welded part (6) fixed on another welding station (21) to the top of the lifting and rotating cylinder (4). The output end of the pen-shaped cylinder (32) where the welded part (6) that has completed the welding work is located is retracted, and the welded part (6) is removed and a new welded part (6) is placed.

5. The method for using the single-weld-spot laser welding equipment according to claim 4, characterized in that: In step S1, the L-shaped air flow main circuit (22) is connected to an external air supply device and the relative position is fixed by a fixed angle bracket (29). The air flow distribution pipeline assembly (28) on the L-shaped air flow main circuit (22) has eight air outlet interfaces (26), and the air flow control valve between the air outlet interfaces (26) and the pen-shaped cylinder (32) is relatively independent.

6. The method for using the single-weld-spot laser welding equipment according to claim 4, characterized in that: In the step S3, during the welding process of the laser welding gun (8), the C-shaped mounting frame (5) is rotated accordingly under the drive of the lifting and rotating cylinder (4), and the laser welding gun (8) and the C-shaped mounting frame (5) do not collide with each other. After the welding is completed, the laser welding gun (8) is lifted up, and the C-shaped mounting frame (5) is reset accordingly.

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