Pressurizing and positioning device for ultrafast laser welding

Abstract

The utility model relates to a pressurizing and positioning device for ultrafast laser welding, which is used for clamping a first welding piece and a second welding piece and comprises a base, a pressing plate and a pressing plate. The rotating table is mounted on the base, can rotate and is used for placing a first welding piece and a second welding piece; the two fixing columns are connected with the base and located on the two sides of the rotating table, and vertically-distributed straight racks are arranged on the surfaces of the fixing columns; the two ends of the connecting rod are connected with the two fixing columns respectively, and the connecting rod can move up and down along the fixing columns; the height adjusting and fixing assembly is used for connecting the fixing column and the connecting rod; and the pressurizing and positioning assembly is used for applying pressure to the second welding piece, is mounted on the connecting rod and can transversely move along the connecting rod. Compared with the prior art, the ultrafast laser welding precision can be effectively improved, the structure is simple, and the cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pressurizing positioning devices, in particular to a kind of pressurizing positioning devices for ultrafast laser welding. BACKGROUND

[0002] Fusion of glass and metal is widely used in various fields, including electronic packaging, micro-optoelectronic systems and complex satellite sensors. Using pulser light to bond glass and metal is an attractive alternative to traditional welding techniques, such as mockup bonding, diffusion bonding and adhesive bonding. Recently, ultrafast pulsed lasers, including femtosecond and picosecond lasers, have attracted great interest in welding applications due to their excellent precision in providing welding energy within a certain range. These lasers produce minimal heat-affected zones, making them suitable for precise and efficient welding processes. However, despite their advantages, their application still presents challenges, such as a small gap between the two welding pieces and a small relative sliding between the two welding pieces when the rotating table rotates, greatly reducing the success rate of welding. The existing gap between the two welding pieces needs to be ensured within a few microns, which requires operation in harsh environments and requires solving the complexity of the system, which may all lead to cost increases. SUMMARY

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a pressurizing positioning device for ultrafast laser welding, which can effectively improve the precision of ultrafast laser welding, while being simple in structure and low in cost.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A pressurizing positioning device for ultrafast laser welding is used for clamping a first welding piece and a second welding piece, and the pressurizing positioning device comprises:

[0006] a base;

[0007] a rotating table rotatable mounted on the base and used for placing the first welding piece and the second welding piece;

[0008] two fixed columns connected with the base and located on both sides of the rotating table, with vertical distribution of straight racks on their surfaces;

[0009] a connecting rod connected with the two fixed columns at both ends and movable up and down along the fixed columns;

[0010] a height-adjusting fixing assembly for connecting the fixed column and the connecting rod;

[0011] and a pressurizing positioning assembly for applying pressure to the second welding member, the pressurizing positioning assembly being mounted on the connecting rod and being movable transversely along the connecting rod.

[0012] Further, the height-adjusting fixing assembly comprises a housing through which the fixing column and the connecting rod pass, a segmented bolt extending into the housing and used for adjusting the height of the connecting rod, and a first bolt extending into the housing and used for abutting against the fixing column, the segmented bolt comprising:

[0013] a bolt body;

[0014] a gear fixed to one end of the bolt body and engaged with the straight rack;

[0015] a rotating head fixed to the other end of the bolt body;

[0016] and a fixing member sleeved in the middle part of the bolt body, the fixing member being rotationally connected with the bolt body and being threadedly connected with the housing.

[0017] Further, the housing is provided with a first hole through which the fixing column passes, a second hole through which the connecting rod passes, a third hole through which the segmented bolt passes, and a fourth hole through which the first bolt passes.

[0018] Further, the first hole is perpendicular to the third hole and intersects with the third hole in a side surface, and the gear is engaged with the straight rack of the fixing column at the intersection without being affected by the housing.

[0019] Further, the first hole is perpendicular to the fourth hole, and the end surface of the fourth hole is connected with the side surface of the first hole.

[0020] Further, the fixing member is a circular ring with a first thread provided on the surface thereof;

[0021] the inner surface of the third hole is provided with a second thread matched with the first thread and connecting the fixing member with the housing.

[0022] Further, the housing and the connecting rod are connected by a second bolt.

[0023] Further, the height-adjusting fixing assembly is provided with two, respectively connected with the two ends of the connecting rod, and when the height-adjusting fixing assembly is adjusted, the two height-adjusting fixing assemblies are controlled to move synchronously so that the connecting rod is always in a horizontal state.

[0024] Further, the pressurizing positioning assembly comprises:

[0025] a moving block passing through the connecting rod and being movable transversely along the connecting rod;

[0026] A fixed connector installed below the moving block;

[0027] And a pneumatic clamp installed below the fixed connector and exerting pressure on the second welding piece, including a cylinder, a telescopic rod controlled by the cylinder and located at one end of the telescopic rod and used for positioning and pressing the second welding piece.

[0028] Further, the circular head cover includes a head cover ring and a circular arc surface;

[0029] The annular boss includes a circular bottom surface and a circular ring-shaped boss located around the circular bottom surface, and the head cover ring of the circular arc head cover can be in close contact with the surface of the circular ring-shaped boss.

[0030] Further, the projection of the connecting rod in the vertical direction passes through the center of the circular arc head cover.

[0031] Further, the first welding piece is made of Invar alloy, and the second welding piece is made of sapphire.

[0032] Further, the first welding piece is a circular boss, and the second welding piece is a circular arc head cover.

[0033] The positioning block is a spherical segment shape matched with the center position of the top of the circular arc head cover, and the opening of the spherical segment shape is directed to the second welding piece, so that the force is evenly distributed and good pressure is achieved, and the performance of the circular arc head cover is not affected.

[0034] Further, the height h of the spherical segment-shaped positioning block is less than the radius R of the complete sphere.

[0035] Further, the radius of the bottom surface of the spherical segment-shaped positioning block is 15% to 30% of the outer diameter of the head cover ring of the circular arc head cover, the spherical surface radius (SR) of the inner circular arc of the spherical segment-shaped positioning block is consistent with the spherical surface radius of the circular arc surface, the error is ±5%, and the spherical surface radius of the inner circular arc of the spherical segment-shaped positioning block is greater than the spherical surface radius of the inner circular arc of the positioning block, and the difference is 0.5% to 2%.

[0036] Further, the center position of the top of the circular arc head cover is provided with a positioning point, which is more conducive to the accuracy of positioning.

[0037] Further, the rotating table includes:

[0038] A fixed block installed on the base;

[0039] A rotating motor installed on the fixed block;

[0040] A rotating plane connected with the rotating shaft of the rotating motor and rotating with the rotating shaft.

[0041] Further, the rotating plane has a thickness of 2-5 mm, and cannot be too thin to prevent the rotating plane from stress deformation caused by the first and second welding pieces being too heavy, thereby causing the rotating table to operate unstably and resulting in welding errors.

[0042] Compared with the prior art, the utility model has the following advantages:

[0043] (1) The pressurizing positioning device provided by the utility model, by setting the pressurizing positioning assembly, when the first and second welding pieces are accurately positioned but there is a small gap between the two, the second welding piece is pressed to make the first and second welding pieces closely adhere to each other, and no deviation occurs when the rotating table rotates, thereby improving the welding precision; when the first and second welding pieces are not completely aligned and there is a deviation between the two, the second welding piece is pressed to make the first and second welding pieces closely adhere to each other while enabling the second welding piece to be horizontally displaced under the action of the pressure and move to a suitable position, thereby realizing accurate positioning of the first and second welding pieces and effectively improving the welding precision.

[0044] (2) The pressurizing positioning device provided by the utility model, by setting the pressurizing positioning assembly, whether there is a deviation between the positioning block and the second welding piece can be determined according to the adhesion of the positioning block to the second welding piece; when the center position of the positioning block and the second welding piece directly above is closely adhered, it indicates that the positioning block is accurately positioned and there is no deviation; when there is a gap in the center position of the positioning block and the second welding piece directly above and the two cannot closely adhere to each other, it indicates that the positioning block is not accurately positioned, and the position of the positioning block is adjusted.

[0045] (3) The pressurizing positioning device provided by the utility model can position and determine the positions of the first and second welding pieces before welding, thereby avoiding adjustment of the positions of the first and second welding pieces during the welding process and rework caused by unqualified products obtained by welding, and effectively improving the welding efficiency.

[0046] (4) The pressurizing positioning device provided by the utility model, through the rotation of the rotating head of the sectional bolt, drives the gear to rotate, moves the bolt body up and down, and further drives the shell connected with the fixing piece of the sectional bolt to move up and down, thereby realizing the up-and-down movement of the connecting rod, and the up-and-down movement position is accurate, so that the superfast laser welding efficiency and accuracy can be effectively improved. The pressurizing positioning device provided by the utility model has simple structure and connection relationship and is convenient to operate.

[0047] (5) The pneumatic clamp of the pressurizing positioning device can better adhere to the surface of the second welding piece, so that the clamp has good compacting and uniform stress effect, and guarantees the accuracy of subsequent superfast laser welding. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a three-dimensional structure schematic view of the pressurizing positioning device shown in embodiment 1.

[0049] Figure 2 It is a front view of the pressurizing positioning device shown in embodiment 1.

[0050] Figure 3 It is a structure schematic view of the adjusting and fixing assembly shown in embodiment 1.

[0051] Figure 4 It is a structure schematic view of the sectional bolt shown in embodiment 1.

[0052] Figure 5 It is a schematic view of the engagement of the gear and the straight rack of the fixed column of the sectional bolt shown in embodiment 1.

[0053] Figure 6 It is a structure schematic view of the pressurizing positioning assembly shown in embodiment 1.

[0054] Figure 7 It is a structure schematic view of the first welding piece shown in embodiment 1.

[0055] Figure 8 It is a structure schematic view of the second welding piece shown in embodiment 1.

[0056] Figure 9 It is a structure schematic view of the positioning block shown in embodiment 1.

[0057] Figure 10 It is a structure schematic view of the rotating table shown in embodiment 1.

[0058] Figure 11 It is a schematic view of the first welding piece and the second welding piece shown in embodiment 2.

[0059] MARK DESCRIPTION IN THE DRAWINGS:

[0060] 1 - first welding piece, 11 - circular bottom surface, 12 - circular ring-shaped protrusion;

[0061] 2 - second welding piece, 21 - head cover circular ring, 22 - circular arc surface, 221 - positioning point;

[0062] 3 - base;

[0063] 4 - rotating table, 41 - fixed block, 42 - rotating motor, 43 - rotating plane;

[0064] 5 - fixed column, 51 - straight rack;

[0065] 6 - connecting rod;

[0066] 7 - adjusting and fixing assembly, 71 - shell, 711 - first hole, 712 - second hole, 713 - third hole, 714 - fourth hole, 72 - segmented bolt, 721 - bolt body, 722 - gear, 723 - rotating head, 724 - fixing piece, 7241 - first thread, 73 - first bolt, 74 - second bolt;

[0067] 8 - pressurizing and positioning assembly, 81 - moving block, 82 - fixed connecting piece, 83 - pneumatic clamp, 831 - air cylinder, 832 - telescopic rod, 833 - positioning block. DETAILED DESCRIPTION

[0068] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments. In the following embodiments or embodiments, if there are no special instructions for the function components or structures, it is indicated that they are all conventional components or conventional structures adopted in the field to realize the corresponding functions.

[0069] It should be noted that in the description of the utility model, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0070] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0071] Example 1

[0072] like Figures 1-3 As shown, a pressure positioning device for ultrafast laser welding is used for clamping a first weldment 1 and a second weldment 2. The pressure positioning device includes:

[0073] Base 3;

[0074] A rotating platform 4, mounted on the base 3, is rotatable and used to place the first welded component 1 and the second welded component 2.

[0075] Two fixed columns 5 connected to the base 3 and located on both sides of the rotating platform 4 are provided with vertically distributed straight toothed racks 51 on their surfaces;

[0076] A connecting rod 6 whose two ends are respectively connected to the two fixed columns 5 and can move up and down along the fixed columns 5;

[0077] Height adjustment and fixing assembly 7 for connecting the fixed column 5 and the connecting rod 6;

[0078] And a pressure positioning assembly 8 for applying pressure to the second welded part 2, the pressure positioning assembly 8 being mounted on the connecting rod 6 and movable laterally thereto.

[0079] In this embodiment, as Figures 3-5 As shown, the height adjustment and fixing assembly 7 includes a housing 71 through which the fixing post 5 and the connecting rod 6 pass simultaneously, a segmented bolt 72 extending into the housing 71 for adjusting the height of the connecting rod 6, and a first bolt 73 extending into the housing 71 for abutting against the fixing post 5. The segmented bolt 72 includes:

[0080] Bolt body 721;

[0081] A gear 722 fixed to one end of the bolt body 721 and meshing with the rack 51;

[0082] A rotating head 723 is fixed to the other end of the bolt body 721;

[0083] A fixing member 724 is sleeved in the middle of the bolt body 721, and is rotatably connected with the bolt body 721 and threadedly connected with the shell 71.

[0084] In this embodiment, the shell 71 is provided with a first hole 711 for the fixed column 5 to pass through, a second hole 712 for the connecting rod 6 to pass through, a third hole 713 for the segmented bolt 72 to pass through, and a fourth hole 714 for the first bolt 73 to pass through.

[0085] In this embodiment, the first hole 711 is perpendicular to the third hole 713 and intersects with the side surface of the third hole 713, and the gear 722 is engaged with the rack 51 of the fixed column 5 at the intersection without being affected by the shell 71.

[0086] In this embodiment, the first hole 711 is perpendicular to the fourth hole 714, and the end surface of the fourth hole 714 is connected with the side surface of the first hole 711.

[0087] In this embodiment, the fixing member 724 is a circular ring with a first thread 7241 arranged on the surface thereof.

[0088] The inner surface of the third hole 713 is provided with a second thread matched with the first thread 7241 and connecting the fixing member 724 with the shell 71.

[0089] In this embodiment, the shell 71 is connected with the connecting rod 6 by a second bolt 74.

[0090] In this embodiment, the height adjustment fixing assembly 7 is provided with two, respectively connected with the two ends of the connecting rod 6, and when the height adjustment fixing assembly 7 is adjusted, the two height adjustment fixing assemblies 7 are controlled to move synchronously, so that the connecting rod 6 is always in a horizontal state.

[0091] In this embodiment, as shown in Figure 6 The pressurizing positioning assembly 8 comprises:

[0092] A moving block 81 passing through the connecting rod 6 and movable transversely along the connecting rod 6;

[0093] A fixed connecting member 82 installed below the moving block 81;

[0094] A pneumatic clamp 83 installed below the fixed connecting member 82 and applying pressure to the second welding member 2, comprising a gas cylinder 831, a telescopic rod 832 controlled by the gas cylinder 831 and extending and retracting, and a positioning block 833 located at one end of the telescopic rod 832 and used for aligning and pressing the second welding member 2.

[0095] In the embodiment, as shown in Figure 7 、 8 The circular head cover comprises a head cover ring 21 and a circular arc surface 22.

[0096] The annular boss comprises a circular bottom surface 11 and a circular ring-shaped protrusion 12 located around the circular bottom surface, and the head cover ring 21 of the circular arc head cover can be in close contact with the surface of the circular ring-shaped protrusion 11.

[0097] In the embodiment, the projection of the connecting rod 6 in the positive direction passes through the center of the circular arc head cover.

[0098] In the embodiment, the first welding piece 1 is made of Invar alloy, has a maximum outer diameter of 320 mm and a maximum height of 42 mm, and is manufactured by Dongshiwangbaolong Alloy Technology Co., Ltd.; the second welding piece 2 is made of sapphire, has an outer diameter of 300 mm, an inner diameter of 276.7 mm, an outer circular arc radius of SR250 mm, and an inner circular arc radius of SR244 mm, and is manufactured by Kunshan Sujing Optoelectronics Technology Co., Ltd.

[0099] The first welding piece 1 is a circular boss, and the second welding piece 2 is a circular arc head cover.

[0100] The positioning block 833 is a spherical segment shape matched and fitted with the center position of the top of the circular arc head cover, has an opening facing the second welding piece 2, can refer to a suction cup, achieves uniform stress and good pressurization effect, and does not affect the performance of the circular arc head cover.

[0101] In the embodiment, the height h of the spherical segment-shaped positioning block 833 is less than the radius R of a complete sphere.

[0102] In the embodiment, as shown in Figure 9 The radius of the bottom surface of the spherical segment-shaped positioning block 833 is 15% to 30% of the outer diameter of the head cover ring 21 of the circular arc head cover, the radius of the bottom surface of the positioning block 833 is 65 mm, which is 22% of the outer diameter of the head cover ring 21 of the circular arc head cover, the radius of the spherical surface of the inner circular arc of the spherical segment-shaped positioning block 833 is 250 mm, which is represented as SR250 mm, is consistent with the radius of the spherical surface of the circular arc, and the error is ±5%, and the outer circular arc of the spherical segment-shaped positioning block 833 is SR256 mm.

[0103] In the embodiment, the circular head cover comprises a head cover ring 21 and a circular arc surface 22.

[0104] The annular boss comprises a circular bottom surface 11 and a circular ring-shaped protrusion 12 located around the circular bottom surface, and the head cover ring 21 of the circular arc head cover can be in close contact with the surface of the circular ring-shaped protrusion 11.

[0105] In the embodiment, the projection of the connecting rod 6 in the positive direction of the Y axis passes through the center of the circular arc head cover.

[0106] In the embodiment, as shown in Figure 11 the rotating table 4 comprises:

[0107] a fixed block 41 mounted on the base 3;

[0108] a rotating motor 42 mounted on the fixed block 41;

[0109] and a rotating plane 43 connected with the rotating shaft of the rotating motor 42 and rotating with the rotating shaft.

[0110] In the embodiment, the thickness of the rotating plane 43 is 3 mm, which cannot be too thin to prevent the stress deformation of the rotating plane 43 caused by the excessive weight of the first and second welding members 1 and 2, thereby causing the unstable operation of the rotating table 4 and the welding error. The center of the rotating plane 43 is connected with the rotating shaft of the rotating motor 42, so that the rotating plane 43 is located at the center, avoiding the uneven welding stress.

[0111] In the embodiment, the working process and principle of the pressurizing positioning device are as follows:

[0112] The first welding piece 1 is placed on the rotating plane 43 of the rotating table 4, and the second welding piece 2 is placed above the first welding piece 1 and attached to it. At the same time, the rotating heads 723 of the two adjusting and fixing assemblies 7 are rotated, and the rotating angle and speed are controlled to be consistent. Since the gear 722 and the rotating head 723 are fixed at the two ends of the bolt body 721 respectively, the gear 722 rotates while moving downward along the straight rack 51. Since the first thread 7241 of the fixing piece 724 is threadedly connected with the second thread of the third hole 713, and the fixing piece 724 is sleeved in the middle part of the bolt body 721, the shell 71 moves downward with the bolt body 721, that is, the rotating head 723 rotates to make the shell 71 move downward, and in turn drives the connecting rod 6 to move downward, so that the pressurizing and positioning assembly 8 located on the connecting rod 6 moves downward. When it moves to the position where the positioning block 833 is only a few millimeters away from the arc surface 22 of the arc-shaped head cover of the second welding piece 2, the first bolt 73 is used to fix the shell 71 and the fixing column 5. The moving block 81 is moved to make the positioning block 833 located at the center position directly above the arc surface 22 of the arc-shaped head cover of the second welding piece 2 in this embodiment. The rotating head 723 is continuously rotated to make the positioning block 833 move downward to the center position directly above the arc surface 22 of the second welding piece. When the positioning block 833 is accurately positioned, the positioning block 833 is tightly attached to the second welding piece 2; when the positioning block 833 is not accurately positioned, the positioning block 833 cannot be tightly attached to the second welding piece 2, and there is a gap. The positioning block 833 is always adjusted to be located at the center position directly above the arc surface 22 of the second welding piece. The first bolt 73 is used to fix the shell 71 and the fixing column 5. At this time, the pressure exerted by the cylinder 831 on the second welding piece 2 is controlled to press the first welding piece 1 and the second welding piece 2 tightly. When the first welding piece 1 and the second welding piece 2 are accurately positioned and there is no deviation between them, the pressure exerted on the second welding piece 2 can make there be no small gap between the first welding piece 1 and the second welding piece 2, so that they are tightly attached to each other; when the first welding piece 1 and the second welding piece 2 are not accurately positioned and there is a small deviation between them, the pressure exerted on the second welding piece 2 can make the first welding piece 1 and the second welding piece 2 tightly attached to each other while the second welding piece 2 is horizontally displaced under the action of the pressure to move to a suitable position, so as to realize the accurate positioning of the first welding piece 1 and the second welding piece 2, and effectively improve the welding precision. The rotating motor 42 is turned on to rotate the rotating table 4, the position of the fixed laser spot is fixed, and welding is performed. The first welding piece 1 and the second welding piece 2 are always tightly attached to each other under the pressure action of the pressurizing and positioning assembly 8, which is beneficial to the accuracy in the subsequent welding process.

[0113] Embodiment 2

[0114] Compared with the embodiment 1, most of them are the same, except that the positioning point 221 is arranged at the center position of the top of the arc-shaped head cover, as shown in Figure 10 which is more beneficial to the accuracy of positioning.

[0115] The above description of the embodiments is for the purpose of enabling and using the utility model by those of ordinary skill in the art. Those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A pressurized positioning device for ultrafast laser welding, characterized by, The application relates to a pressurizing positioning device for clamping a first welding piece (1) and a second welding piece (2), which comprises the following components: a base (3); a rotating table (4) installed on the base (3) and used for placing the first welding piece (1) and the second welding piece (2); two fixed columns (5) connected with the base (3) and located on both sides of the rotating table (4), the surfaces of the fixed columns (5) are provided with vertically distributed straight racks (51); a connecting rod (6) connected with the two fixed columns (5) respectively and capable of moving up and down along the fixed columns (5); a height adjusting fixing assembly (7) used for connecting the fixed columns (5) and the connecting rod (6); and a pressurizing positioning assembly (8) used for applying pressure to the second welding piece (2), the pressurizing positioning assembly (8) is installed on the connecting rod (6) and can move laterally along the connecting rod (6).

2. The pressurized positioning device for ultrafast laser welding according to claim 1, wherein The height adjusting fixing assembly (7) comprises an outer shell (71) through which the fixed columns (5) and the connecting rod (6) pass, a segmented bolt (72) extending into the outer shell (71) and used for adjusting the height of the connecting rod (6), and a first bolt (73) extending into the outer shell (71) and used for abutting against the fixed columns (5), the segmented bolt (72) comprises: a bolt body (721); a gear (722) fixed at one end of the bolt body (721) and engaged with the straight rack (51); a rotating head (723) fixed at the other end of the bolt body (721); and a fixing member (724) sleeved on the middle part of the bolt body (721), the fixing member is rotationally connected with the bolt body (721) and is threadedly connected with the outer shell (71).

3. The pressurized positioning device for ultrafast laser welding according to claim 2, wherein The outer shell (71) is provided with a first hole (711) through which the fixed columns (5) pass, a second hole (712) through which the connecting rod (6) passes, a third hole (713) through which the segmented bolt (72) passes, and a fourth hole (714) through which the first bolt (73) passes.

4. The pressurized positioning device for ultrafast laser welding according to claim 3, wherein The first hole (711) is perpendicular to the third hole (713) and intersects with the side surface of the third hole (713), and the gear (722) is engaged with the straight rack (51) of the fixed column (5) at the intersection.

5. The pressurized positioning device for ultrafast laser welding according to claim 3, wherein The first hole (711) is perpendicular to the fourth hole (714), and the end surface of the fourth hole (714) is connected with the side surface of the first hole (711).

6. The pressurized positioning device for ultrafast laser welding according to claim 3, wherein The fixing member (724) is a circular ring provided with a first thread (7241) on the surface; the inner surface of the third hole (713) is provided with a second thread matched with the first thread (7241) and used for connecting and fixing the fixing member (724) with the outer shell (71).

7. The pressurized positioning device for ultrafast laser welding of claim 2, wherein, The outer shell (71) and the connecting rod (6) are connected through a second bolt (74).

8. The pressurized positioning device for ultrafast laser welding of claim 1, wherein, The pressurizing positioning assembly (8) comprises: a moving block (81) passing through the connecting rod (6) and capable of moving laterally along the connecting rod (6); a fixed connecting member (82) installed below the moving block (81); And a pneumatic clamp (83) installed below the fixed connector (82) and exerting pressure on the second welding piece (2), comprising a cylinder (831), a telescopic rod (832) controlled by the cylinder (831) and extending and retracting, and a positioning block (833) at one end of the telescopic rod (832) and used for positioning and pressing the second welding piece (2).

9. The pressurized positioning device for ultrafast laser welding according to claim 8, wherein The first welding piece (1) is a circular boss, and the second welding piece (2) is a circular arc head cover. The positioning block (833) is a spherical segment shape matching and fitting the center position of the top of the circular arc head cover, and the opening thereof faces the second welding piece (2).

10. The pressurized positioning device for ultrafast laser welding of claim 1, wherein, The rotating table (4) comprises: A fixed block (41) installed on the base (3); A rotating motor (42) installed on the fixed block (41); And a rotating plane (43) connected with the rotating shaft of the rotating motor (42) and rotating with the rotating shaft.

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