Femtosecond laser welding device for welding sapphire and stainless steel

Abstract

The invention discloses a femtosecond laser welding device for sapphire and stainless steel welding, which comprises a support assembly, a laser welding assembly, a laser welding assembly and a laser welding assembly, and is characterized in that the support assembly comprises a support, a support table arranged on the support, a support body arranged on the support table and a front-back sliding part arranged on the support body; the welding assembly comprises an adjusting moving part connected with the support body, an extending rod body connected to the support body in a sliding mode, a testing plate arranged at the lower end of the extending rod body and a clamping hole formed in the testing plate, a grabbing part is arranged on the testing plate, and front-back displacement of a blocking ball can drive a welding head to move front and back; and therefore, multi-point welding can be carried out between the sapphire and the stainless steel, so that the welding strength is high while welding points are small.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar strength testing, and in particular to a femtosecond laser welding device for welding sapphire and stainless steel. Background Art

[0002] Femtosecond laser has huge instantaneous power and extremely short pulses, and can obtain very high peak intensity at low pulse energy. Due to the nonlinear effect when irradiating transparent materials, femtosecond laser can pass through transparent materials for flexible three-dimensional processing by relying on multi-photon absorption mechanism, while long pulse laser cannot do this. Moreover, transparent materials are brittle materials, and the thermal stress generated by long pulse laser heating will cause transparent materials to break and fragments to fly out. Because laser damage will occur when the laser irradiates transparent materials, and the damage threshold decreases significantly with the decrease of pulse width, so femtosecond laser has a very small damage threshold, and femtosecond laser will not cause transparent materials to break when passing through transparent materials. When femtosecond laser passes through transparent materials, the energy is limited to the skin depth, and the action time is extremely short. Before the energy has time to diffuse, the metal material being acted on has been heated to an extremely high temperature and evaporated directly in the form of gas phase, taking away most of the heat while evaporating, making the heat affected zone very small. Therefore, femtosecond laser can achieve precision processing, and its resolution can reach several microns.

[0003] Currently, stainless steel and sapphire need to be welded, but due to the difference between the two materials, welding is very difficult, but there is a lack of a device for welding the two. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the existing femtosecond laser welding device for welding sapphire and stainless steel, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a femtosecond laser welding device for welding sapphire to stainless steel.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a femtosecond laser welding device for welding sapphire and stainless steel, comprising: a support assembly, including a bracket, a bracket platform arranged on the bracket, a bracket body arranged on the bracket platform, and a front and rear sliding member arranged on the bracket body; and a welding assembly, including an adjustment moving member connected to the bracket body, an extension rod body slidably connected to the bracket body, a test plate arranged at the lower end of the extension rod body, and a clamping hole opened on the test plate, wherein a grabbing member is provided on the test plate.

[0008] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel described in the present invention, the support body is arranged on the middle side wall of the support platform, and the front and rear sliding parts include a lead screw arranged on the support platform, a slider arranged on the support body, and a first motor arranged at the upper end of the lead screw.

[0009] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel described in the present invention, the bracket body includes a support rod body connected to the slider and a hanging frame body connected to the support rod body, both ends of the hanging frame body extend outward, a slide rail is arranged at the lower end of the hanging frame body, and the adjusting movable part is arranged on the hanging frame body.

[0010] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel of the present invention, wherein: the adjusting movable member comprises a first frame body arranged on the hanging frame body, and a hanging plate slidably connected to the lower end of the first frame body;

[0011] The hanging plate is provided with a first welding head, and a linkage pressure regulating member is provided between the first welding head and the hanging frame.

[0012] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel described in the present invention, the linked pressure regulating member includes a blocking ball and a connecting rod arranged at the rear end of the blocking ball, the blocking ball is connected to the first welding head, the connecting rod is provided with a first clamping tooth, a rotating rod is rotatably connected in the connecting tube, a second clamping tooth cooperating with the first clamping tooth is provided at the front end of the rotating rod, the connecting tube rotating wheel is connected to a rotating roller, and a blocking block is provided on the rotating roller.

[0013] Wherein, a rotating wheel is arranged at the end of the rotating rod, an arc surface cooperating with the rotating wheel is opened on the blocking block, and a torsion spring is arranged on the rotating shaft of the rotating rod.

[0014] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel described in the present invention, wherein: the extension rod body is arranged at both ends of the hanging frame body, the hanging frame body is provided with a second cylinder for pushing one of the telescopic extension rod bodies to slide, the extension rod body is provided with a matching slot that cooperates with the slide rail, the lower end of the extension rod body is provided with a connecting block body connected to the test plate, and the rotating component is arranged in the connecting block body.

[0015] As a preferred solution of the femtosecond laser welding device for welding sapphire to stainless steel of the present invention, wherein: a sliding groove is provided on the connecting block, only half of the gear teeth on the first rotating gear are provided, the sliding groove is directly opposite to the side of the first rotating gear without gear teeth, and a driving handle is provided on the first rotating gear;

[0016] The sliding grooves on the two connecting blocks are arranged in non-mirror symmetry with each other.

[0017] As a preferred solution of the femtosecond laser welding device for welding sapphire and stainless steel described in the present invention, the driving component includes a first transmission pulley arranged on a first rotating gear, a second transmission pulley arranged on a hanging frame and connected to the first transmission pulley belt, a driving plate connected to the rotating wheel, a bracket arranged on the hanging frame, a guide gear rotatably connected to the bracket, a guide bar arranged on the driving plate and meshing with the guide gear, and a bevel gear set arranged between one of the guide gears and the second transmission pulley.

[0018] As a preferred solution of the femtosecond laser welding device for welding sapphire to stainless steel described in the present invention, the two guide gears are coaxially arranged, and there are only four gear teeth on the guide gear, and the two guide gears are arranged in opposite directions.

[0019] As a preferred solution of the femtosecond laser welding device for welding sapphire to stainless steel described in the present invention, one of the guide gears is slidably connected with a ring, a sliding bar is provided on the back of the gear teeth, a groove is provided on the guide gear, a spring is provided between the sliding bar and the ring, a sliding shaft is provided between the two guide gears, and an electric cylinder connected to the ring is provided on the sliding shaft.

[0020] The beneficial effects of the present invention are as follows: when welding, the operator inserts the two structures to be welded into the two butt joint tubes respectively, and then the operator rotates the ring gear so that the ring gear drives the rotation of the rotating plate, thereby changing the positions of several connecting rods from near the edge to near the center of the rotating plate, or from the center to the edge, and the movement of the connecting rod will drive the position change of the lower end of the adjusting rod. When the connecting rod moves to the position close to the edge, it will pull the adjusting rod to rotate, so that the lower end of the adjusting rod rotates from a position close to the center to a position close to the edge, so that the upper ends of the connecting rods are adjusted from a state originally far away from each other to a state close to each other, thereby tightening the two ends of the steel bar, and then driving the butt joint tube to rotate through the first rotating gear and the second rotating gear.

[0021] Then the first rotating gear will drive the rotation of the first transmission pulley, further drive the rotation of the second transmission pulley, and then drive the rotation of the sliding shaft, and then drive the rotation of the guide gear. Because the two guide gears are respectively arranged at the two ends of the driving plate, when the two guide gears continue to rotate, they will continuously engage with the driving plate, and then drive the forward and reverse rotation of the driving plate, and then the rotation of the driving plate will drive the rotation of the rotating wheel. When the rotating wheel moves, it will abut against the arc surface, which will cause the rotating rod to rotate, and then the front end will drive the forward and backward displacement of the blocking ball.

[0022] The forward and backward displacement of the blocking ball will drive the forward and backward movement of the welding head, thereby enabling multi-point welding between the sapphire and the stainless steel, making the welding points small and the welding strength high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0024] Figure 1 The figure is a schematic diagram of the overall structure of the femtosecond laser welding device for welding sapphire and stainless steel according to the present invention.

[0025] Figure 2 The figure is a schematic overall rear view of the femtosecond laser welding device for welding sapphire and stainless steel according to the present invention.

[0026] Figure 3 The figure is a schematic diagram of the explosion of the rotating parts of the femtosecond laser welding device for welding sapphire and stainless steel according to the present invention.

[0027] Figure 4 The figure is a schematic diagram of a voltage regulating component of a femtosecond laser welding device for welding sapphire to stainless steel according to the present invention.

[0028] Figure 5 The present invention is a schematic diagram of the connection between the voltage regulating component and the driving component of the femtosecond laser welding device for welding sapphire to stainless steel.

[0029] Figure 6 The figure is a schematic diagram of the driving components of the femtosecond laser welding device for welding sapphire and stainless steel according to the present invention.

[0030] Figure 7 The figure is a schematic diagram of the guide gear of the femtosecond laser welding device for welding sapphire and stainless steel of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figure 1-7 , which is the first embodiment of the present invention, provides a femtosecond laser welding device for welding sapphire and stainless steel, including a support assembly 100. In this embodiment, the support assembly 100 includes a bracket 101, and the bracket 101 is set on a workbench or installed on the ground using a lower end rod. A bracket platform 102 is also set on the bracket 101, and a bracket body 103 is set on the bracket platform 102. A front and rear sliding member 104 is also set on the bracket body 103. The front and rear sliding members 104 can slide and synchronously drive the bracket body 103 to move in the longitudinal direction.

[0037] Furthermore, the present invention also includes a welding assembly 200, which includes an adjusting movable part 201 connected to the bracket body 103, an extension rod body 202 slidably connected to the bracket body 103, a test plate 203 arranged at the lower end of the extension rod body 202, a snap-in hole 204 opened on the test plate 203, and a rotating part 205 arranged on the test plate 203. The extension rod body 202 is arranged at both ends of the bracket body 103, and the test plate 203 is arranged corresponding to each extension rod body 202, and the two test plates 203 are arranged opposite to each other.

[0038] Preferably, the support body 103 is arranged on the side wall of the middle part of the support platform 102, and the front and rear sliding members 104 include a lead screw 104a arranged on the support platform 102, a slider 104b arranged on the support body 103, and

[0039] 104c is driven, and the rotation of the screw rod can drive the slider 104b to slide in the longitudinal direction. In order to limit the movement of the slider 104b, a guide rod is arranged on the bracket 101. The guide rod passes through the slider 104b and limits and guides the slider 104b.

[0040] In this embodiment, the bracket body 103 includes a supporting rod body 103a connected to the slider 104b and a hanging frame body 103b connected to the supporting rod body 103a, both ends of the hanging frame body 103b extend outward, a slide rail 103c is arranged at the lower end of the hanging frame body 103b, and the adjustment moving part 201 is arranged on the hanging frame body 103b.

[0041] In this embodiment, the adjusting movable member 201 includes a first frame body 201 a disposed on the hanging frame body 103 b and a second frame body 201 c connected to the first frame body 201 a .

[0042] Furthermore, the extension rod body 202 is arranged at both ends of the hanging frame 103b, and a second cylinder 400 for pushing the extension rod body 202 to slide is arranged on the hanging frame 103b. Two second cylinders 400 are arranged, and a clamping frame is arranged at the upper end of each hanging frame 103b. The output shaft of the second cylinder 400 is connected to the clamping frame, and then the extension rod body 202 can be pushed outward horizontally. A matching slot 401 that cooperates with the slide rail 103c is opened on the extension rod body 202, and a connecting block body 402 connected to the test plate 203 is arranged at the lower end of the extension rod body 202, and the rotating part is arranged in the connecting block body 402.

[0043] In this embodiment, the rotating component includes a first rotating gear arranged in the connecting block 402, a second rotating gear meshing with the first rotating gear, and a docking tube 205c coaxially arranged with the second rotating gear. The docking tube 205c is docked with the clamping hole 204. When performing a test, the operator inserts the two ends of the steel bar into the two docking tubes 205c respectively, and then drives the docking tube 205c to rotate through the first rotating gear and the second rotating gear.

[0044] Furthermore, a sliding groove 205d is provided on the connecting block 402, and only half of the gear teeth 504a on the first rotating gear are provided, and the sliding groove 205d is opposite to the side of the first rotating gear without the gear teeth 504a, and a driving handle is provided on the first rotating gear; and the sliding grooves 205d on the two connecting blocks 402 are provided in a non-mirror-symmetric manner to each other, so that when the operator controls the rotation of the first rotating gear, the two docking tubes 205c can be rotated in different directions.

[0045] A blocking ball 301 is also slidably connected in the connecting tube, and a connecting rod 302 is connected to the rear end of the blocking ball 301. The connecting rod 302 extends horizontally and is placed in the blocking ball 301. At the same time, a rotating rod 304 is rotatably connected in the connecting tube. The rotating plane of the rotating rod 304 is horizontally set. At the same time, a first latch tooth 303 is set on the connecting rod 302, and a second latch tooth 305 matching the first latch tooth 303 is set at the front end of the rotating rod 304. A rotating roller 306 is connected to the rotating wheel of the connecting tube, and the rotating plane of the rotating roller 306 is vertically set. In addition, an obstruction block 307 is arranged on the rotating roller 306, wherein a rotating wheel 308 is arranged at the end of the rotating rod 304, the rotating plane of the rotating wheel 308 is arranged horizontally, and the rotating side wall abuts against the side wall of the rotating wheel 308, and an arc surface 309 cooperating with the rotating wheel 308 is opened on the obstruction block 307, and the arc surface 309 extends toward the inner direction of the rotating wheel 308, and then when the rotating wheel 308 moves, it will abut against the arc surface 309, and then the rotating rod 304 will rotate, and then the front end will drive the blocking ball 301 to move forward and backward.

[0046] Furthermore, a torsion spring 309a is provided on the rotating shaft of the rotating rod 304, and the driving components include a first transmission pulley arranged on the first rotating gear, a second transmission pulley 501 arranged on the hanging frame 103b and connected to the first transmission pulley belt, a driving plate 502 connected to the rotating wheel 308, a bracket 503 arranged on the hanging frame 103b, a guide gear 504 rotatably connected to the bracket 503, a guide bar 505 arranged on the driving plate 502 and meshing with the guide gear 504, and a bevel gear set 506 arranged between one of the guide gears 504 and the second transmission pulley 501.

[0047] Furthermore, the two guide gears 504 are coaxially arranged, and there are only four gear teeth 504a on the guide gear 504, and the two guide gears 504 are arranged in opposite directions, one of the guide gears 504 is slidably connected with a ring 600, and a slide bar 601 is arranged on the back of the gear tooth 504a, a groove 602 is arranged on the guide gear 504, a spring 603 is arranged between the slide bar 601 and the ring 600, a sliding shaft 604 is arranged between the two guide gears 504, and an electric cylinder connected to the ring 600 is arranged on the sliding shaft 604.

[0048] Operation process: When welding, the operator inserts the two structures to be welded into the two butt joint tubes 205c respectively, and then the operator rotates the ring gear so that the ring gear drives the rotation of the rotating plate, thereby changing the positions of the several connecting rods 302 from near the edge to near the center of the rotating plate, or from the center to the edge, and the movement of the connecting rod 302 will drive the position change of the lower end of the adjustment rod. When the connecting rod 302 moves to the position close to the edge, it will pull the adjustment rod to rotate, so that the lower end of the adjustment rod rotates from the position close to the center to the position close to the edge, so that the upper end of the connecting rod 302 is adjusted from the original state of being far away from each other to the state of being close to each other, thereby tightening the two ends of the steel bar, and then driving the butt joint tube 205c to rotate through the first rotating gear and the second rotating gear.

[0049] Then the first rotating gear will drive the rotation of the first transmission pulley, further drive the rotation of the second transmission pulley 501, and then drive the rotation of the sliding shaft 604, and then drive the rotation of the guide gear 504. Because the two guide gears 504 are respectively arranged at the two ends of the driving plate 502, when the two guide gears 504 continue to rotate, they will continuously mesh with the driving plate 502, and then drive the forward and reverse rotation of the driving plate 502, and then the rotation of the driving plate 502 will drive the rotation of the rotating wheel 308. When the rotating wheel 308 moves, it will abut against the arc surface 309, which will cause the rotating rod 304 to rotate, and then the front end will drive the blocking ball 301 to move forward and backward.

[0050] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0051] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0052] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A femtosecond laser welding device for welding sapphire and stainless steel, characterized in that: include, A support assembly (100) comprises a support (101), a support platform (102) arranged on the support (101), a support body (103) arranged on the support platform (102), and a front and rear sliding member (104) arranged on the support body (103); and, The welding assembly (200) comprises an adjusting movable member (201) connected to the bracket body (103), an extension rod body (202) slidably connected to the bracket body (103), a test plate (203) arranged at the lower end of the extension rod body (202), and a clamping hole (204) opened on the test plate (203); the test plate (203) is provided with a gripping member.

2. The femtosecond laser welding device for welding sapphire to stainless steel according to claim 1, characterized in that: The support body (103) is arranged on the middle side wall of the support platform (102), and the front and rear sliding member (104) comprises a lead screw (104a) arranged on the support platform (102), a slider (104b) arranged on the support body (103), and a first motor (104c) arranged at the upper end of the lead screw (104a).

3. The femtosecond laser welding device for welding sapphire to stainless steel as claimed in claim 2, characterized in that: The bracket body (103) comprises a support rod body (103a) connected to a slider (104b) and a hanging frame body (103b) connected to the support rod body (103a); both ends of the hanging frame body (103b) extend outward; a slide rail (103c) is arranged at the lower end of the hanging frame body (103b); and the adjusting movable member (201) is arranged on the hanging frame body (103b).

4. The femtosecond laser welding device for welding sapphire to stainless steel as claimed in claim 3, characterized in that: The adjusting movable member (201) comprises a first frame (201a) body arranged on a hanging frame body (103b), and a hanging plate (201b) slidably connected to the lower end of the first frame (201a) body; The hanging plate (201b) is provided with a first welding head (201c), and a linked pressure regulating member (300) is provided between the first welding head and the hanging frame (103b).

5. The femtosecond laser welding device for welding sapphire to stainless steel as claimed in claim 4, characterized in that: The linked pressure regulating member (300) comprises a blocking ball (301) and a connecting rod (302) arranged at the rear end of the blocking ball (301); the blocking ball (301) is connected to the first welding head (201c); the connecting rod (302) is provided with a first latching tooth (303); a rotating rod (304) is rotatably connected in the connecting tube; a second latching tooth (305) cooperating with the first latching tooth (303) is provided at the front end of the rotating rod (304); a rotating roller (306) is connected to the rotating wheel of the connecting tube; and a blocking block (307) is provided on the rotating roller (306). The end of the rotating rod (304) is provided with a rotating wheel (308), the blocking block (307) is provided with an arc surface (309) matching with the rotating wheel (308), and the rotating shaft of the rotating rod (304) is provided with a torsion spring (309a).

6. The femtosecond laser welding device for welding sapphire to stainless steel as claimed in claim 5, characterized in that: The extension rod body (202) is arranged at two ends of the hanging frame body (103b), and the hanging frame body (103b) is provided with a second cylinder (400) for pushing one of the telescopic extension rod bodies (202) to slide. The extension rod body (202) is provided with a matching groove (401) that matches the slide rail (103c). The lower end of the extension rod body (202) is provided with a connecting block body (402) connected to the test plate (203), and the rotating component is arranged in the connecting block body (402).

7. The femtosecond laser welding device for welding sapphire to stainless steel according to claim 6, characterized in that: The connecting block (402) is provided with a sliding groove (205d), the gear teeth (504a) on the first rotating gear (205a) are only half provided, the sliding groove (205d) is directly opposite to the side of the first rotating gear (205a) without the gear teeth (504a), and the first rotating gear (205a) is provided with a driving component; The sliding grooves (205d) on the two connecting blocks (402) are arranged in a non-mirror-symmetrical manner.

8. The femtosecond laser welding device for welding sapphire to stainless steel according to claim 1, characterized in that: The driving component comprises a first transmission pulley (500) arranged on a first rotating gear, a second transmission pulley (501) arranged on a mounting frame (103b) and connected to the first transmission pulley (500) by a belt, a driving plate (502) connected to a rotating wheel (308), a bracket (503) arranged on the mounting frame (103b), a guide gear (504) rotatably connected to the bracket (503), a guide bar (505) arranged on the driving plate (502) and meshing with the guide gear (504), and a bevel gear set (506) arranged between one of the guide gears (504) and the second transmission pulley (501).

9. The femtosecond laser welding device for welding sapphire to stainless steel according to claim 8, characterized in that: The two guide gears (504) are coaxially arranged, and there are only four gear teeth (504a) on the guide gear (504), and the two guide gears (504) are arranged in opposite directions.

10. The femtosecond laser welding device for welding sapphire to stainless steel according to claim 8 or 9, characterized in that: A collar (600) is slidably connected to one of the guide gears (504), a slide bar (601) is provided on the back of the gear tooth (504a), a groove (602) is provided on the guide gear (504), a spring (603) is provided between the slide bar (601) and the collar (600), a sliding shaft (604) is provided between the two guide gears (504), and an electric cylinder connected to the collar (600) is provided on the sliding shaft (604).

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