Positioning welding equipment for optical module production and processing

Abstract

The application discloses a positioning welding equipment for optical module production and processing, which comprises a rack, a first positioning mechanism for positioning a pipe base, a second positioning mechanism for positioning a pipe cap, and a laser welding assembly for welding the pipe base and the pipe cap, wherein the rack is provided with a central shaft for driving the first positioning mechanism and the second positioning mechanism to rotate, the first positioning mechanism comprises a first positioning ring and a rotating mechanism for driving the first positioning ring to rotate, the first positioning mechanism further comprises a second positioning ring for fixing the pipe base and a heat dissipation mechanism for weld cooling, and the second positioning mechanism comprises a third positioning ring for fixing the pipe cap. The first positioning mechanism and the second positioning mechanism are equipped, the positioning and fitting of the pipe cap and the pipe base can be realized, the coaxiality is ensured, the laser welding assembly is combined, and the precise positioning and welding operation of the pipe cap and the pipe base is achieved.

Description

Technical Field

[0001] This invention relates to the field of optical module manufacturing technology, and more specifically, to a positioning and welding equipment for optical module manufacturing and processing. Background Technology

[0002] The cap and socket of the optical module, as core structural components of TO-CAN (coaxial package) and some butterfly packages, are both made of metal. They are laser-welded to achieve hermetically sealed protection, high-precision optical coupling, mechanical support, and electrical interconnection, which is crucial to ensuring the optical performance, reliability, and environmental adaptability of the optical module.

[0003] Currently, when laser welding equipment performs welding operations on caps and sockets, it requires the use of fixtures to precisely position the caps and sockets to ensure coaxiality. After the caps and sockets are positioned and fixed, given the extremely high airtightness requirements of the optical module, a 360° circumferential weld is necessary to completely seal the contact interface between the caps and sockets. This requires the laser emitter to rotate 360° around the caps and sockets, and the rotation of the laser emitter necessitates the implementation of a rotating optical system, leading to a complex overall equipment structure and increased costs.

[0004] Simultaneously, after welding, the cap and socket require cooling. Currently, natural cooling is commonly used, but this method is slow, and prolonged exposure of the cap and socket to air can easily lead to weld oxidation, resulting in decreased weld performance. Furthermore, the high temperature at the weld joint generates thermal stress, and natural cooling prolongs the duration of this thermal stress, thereby increasing the risk of damage to the optical components on the cap.

[0005] In conclusion, existing welding equipment still has certain shortcomings and urgently needs to be improved. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, the object of the present invention is to provide a positioning and welding equipment for optical module manufacturing and processing, including a frame, a first positioning mechanism for positioning a tube base, a second positioning mechanism for positioning a tube cap, and a laser welding assembly for welding the tube base and the tube base. The frame is provided with a central shaft for driving the first positioning mechanism and the second positioning mechanism to rotate. The first positioning mechanism includes a first positioning ring and a rotating mechanism for driving the first positioning ring to rotate. A clamping ring is provided at the inner circle of the first positioning ring. The first positioning mechanism further includes a second positioning ring for fixing the pipe seat and a heat dissipation mechanism for cooling the weld. The second positioning ring has a support ring on its inner circumference. The second positioning mechanism includes a third positioning ring for fixing the pipe cap and a sealing cap sleeved on the third positioning ring. A support plate is provided on the inner circumference of the third positioning ring. The third positioning ring and the first positioning ring are movable relative to the second positioning ring. The laser welding assembly includes a laser head.

[0008] As a preferred technical solution: As described above, in a positioning welding device for optical module manufacturing, the bottom end of the central shaft extends into the frame and is connected to the frame bearing. The central shaft has a hollow structure with a double-helix lead screw inserted inside. A first through slot for a first connecting block to pass through and a second through slot for a second connecting block to pass through are provided on the wall of the central shaft. A first movable sleeve and a second movable sleeve are fitted onto the central shaft. The lead screw is connected to a first nut sleeve and a second nut sleeve. The outer wall of the first nut sleeve is welded and fixed to the inner wall of the first movable sleeve through a first connecting block, and the outer wall of the second nut sleeve is welded and fixed to the inner wall of the second movable sleeve through a second connecting block.

[0009] With the above technical solution, two threads with opposite directions are provided on the lead screw. The two threads correspond to the first nut sleeve and the second nut sleeve respectively. Thus, when the lead screw rotates axially, it can drive the first nut sleeve and the second nut sleeve to move closer to each other or further away from each other.

[0010] As described above, in a positioning and welding equipment for optical module manufacturing, multiple first and second positioning mechanisms are arranged in a ring around a central axis. The first positioning mechanism further includes a hollow first fixing strip and a hollow second fixing strip, and the second positioning mechanism further includes a third fixing strip. The first fixing strip is welded to the outer wall of the first movable sleeve, one end of the second fixing strip is welded to the central shaft, and one end of the third fixing strip is welded to the outer wall of the second movable sleeve.

[0011] With the above technical solution, multiple first and second positioning mechanisms are provided, so that multiple sets of pipe seats and pipe seats can be welded at one time by rotation, which greatly improves the work efficiency.

[0012] As described above, in a positioning and welding equipment for optical module manufacturing, the first positioning ring passes through the first fixing strip and is connected to the bearing of the first fixing strip, and the second positioning ring passes through the second fixing strip and is welded and fixed to the second fixing strip.

[0013] With the above technical solution, the first positioning ring is a rotating structure of the first fixed bar, and thus the first positioning ring can drive the tube seat and tube cap to rotate as a whole.

[0014] As described above, in a positioning and welding equipment for optical module manufacturing, the first positioning ring, the second positioning ring, and the third positioning ring are coaxial. The first positioning ring is integrally formed with the clamping ring, the second positioning ring is integrally formed with the support ring, and the inner circle of the third positioning ring is in contact with the outer circular wall of the support plate.

[0015] Through the above technical solution, the coaxial centerline design enables the first and third positioning rings to move toward the second positioning ring, thereby driving the tube cap and tube seat to be positioned and fitted, ensuring coaxiality.

[0016] As described above, in a positioning welding equipment for optical module production and processing, a vertical pole is welded and fixed on the third fixing strip. The top of the vertical pole is connected to a bearing of a support plate. A movable ring is sleeved on the vertical pole. A magnetic ring is fixed on the top surface of the movable ring. Support columns are provided on the bottom surface of the movable rings on both sides of the magnetic ring. An electromagnet is fixed on the surface of the third fixing strip directly below the magnetic ring.

[0017] With the above technical solution, the movable ring can be fixed to the third fixed bar by the support column, and at the same time, the movable ring can move upward along the upright.

[0018] As described above, in a positioning welding equipment for optical module production and processing, a sealing step is provided at the top edge of the sealing cover, an exhaust hole is provided on the outer circular wall of the sealing cover, the bottom end of the sealing cover is open, the bottom end of the sealing cover is welded and fixed to the movable ring, and the opening at the bottom end of the sealing cover is welded and fixed to the outer circular wall of the third positioning ring.

[0019] With the above technical solution, the sealing cover and the third positioning ring are integrated into one structure, so that the third positioning ring can also be fixed on the movable ring and can move synchronously with the movable ring.

[0020] As described above, the positioning and welding equipment for optical module production and processing includes a rotating mechanism comprising a gear ring located within a first fixed strip and a gear meshing with the gear ring. The gear ring is sleeved and fixed on the outer circular wall of a first positioning ring. A fixed shaft is fitted and connected within the shaft hole of the gear, and both ends of the fixed shaft are connected to bearings on the wall of the first fixed strip.

[0021] Through the above technical solution, the gear and the gear ring mesh together to achieve a 360° rotation of the first positioning ring.

[0022] As described above, the positioning and welding equipment for optical module manufacturing includes a heat dissipation mechanism comprising an air guide pipe located within a second fixing strip and an air collecting ring sleeved on a central shaft. The air collecting ring is hollow, with its inner circular wall welded and fixed to the end face of the second fixing strip. The outer circular wall of the air collecting ring is open and is sealed with a bearing-sealed ring. One end of the air guide tube extends from the second fixing strip and is welded to the inner circular wall of the air collecting ring, and the sealing ring is welded to the air inlet tube.

[0023] With the above technical solution, the gas collecting ring can rotate with the second fixed strip, but the sealing ring can remain fixed and will not rotate synchronously, thereby ensuring that the gas guide pipe can stably deliver protective gas.

[0024] As described above, in a positioning and welding equipment for optical module production and processing, the second positioning ring and the supporting ring are an integral hollow structure. The outer circular wall of the second positioning ring is welded and connected to the air guide pipe, and the inner circular wall of the supporting ring is provided with a tangentially designed air outlet hole.

[0025] Through the above technical solution, the tangential design of the vent hole allows the ejected protective gas to flow along the tangential direction of the weld, avoiding direct impact on the cap and causing displacement.

[0026] Beneficial effects: (1) The present invention is equipped with a first positioning mechanism and a second positioning mechanism, which can realize the positioning and fitting of the cap and the seat, ensure coaxiality, and, combined with the laser welding assembly, achieve precise positioning and welding of the cap and the seat.

[0027] (2) This invention includes a clamping ring and a support plate. When positioning the pipe cap and pipe seat, the clamping ring and support plate can apply clamping force to the pipe cap and pipe seat, ensuring a tight fit between them, which helps to improve the subsequent welding quality. At the same time, the clamping ring can be rotated axially through a rotating mechanism. In this way, the clamping ring and the support plate cooperate with each other to drive the pipe cap and pipe seat to rotate 360° as a whole, realizing 360° circumferential welding. In addition, this method has a simple overall structure, low cost, and is suitable for large-scale production.

[0028] (3) The present invention is provided with a sealing cap. After the welding of the cap and the base is completed, the sealing cap moves upward and seals against the second positioning ring, forming an annular cavity around the weld of the cap and the base. By continuously introducing protective gas into the annular cavity, not only can air be prevented from entering and causing the weld to oxidize, but the weld can also be cooled down quickly, greatly shortening the duration of thermal stress and avoiding indirect damage to the optical components due to thermal stress. Attached Figure Description

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein Figure 1 This is a three-dimensional top view of the present invention; Figure 2 This is a three-dimensional bottom view of the present invention; Figure 3 This is a perspective view of the first positioning ring and the clamping ring of the present invention; Figure 4 This is a perspective view of the second positioning ring and the supporting ring of the present invention; Figure 5 This is a perspective view of the third positioning ring and the support plate of the present invention; Figure 6 This is a perspective view of the upright and movable ring of the present invention; Figure 7 This is a perspective view of the central shaft and lead screw of the present invention; Figure 8 This is a cross-sectional view of the first positioning mechanism and the second positioning mechanism during welding operations according to the present invention; Figure 9 This is a cross-sectional view of the first and second positioning mechanisms of the present invention during heat dissipation operation.

[0030] In the diagram: 1. Frame; 2. Central shaft; 3. First fixing bar; 4. First positioning ring; 5. Pressing ring; 6. Second fixing bar; 7. Second positioning ring; 8. Support ring; 9. Third fixing bar; 10. Third positioning ring; 11. Support plate; 12. Upright; 13. Movable ring; 14. Sealing cover; 15. Sealing step; 16. Lead screw; 17. First through groove; 18. First movable sleeve; 19. First connecting block; 20. First nut sleeve; 21. Second through groove; 22. Second movable sleeve; 23. Second connecting block; 24. Second nut sleeve; 25. Fixed shaft; 26. Gear ring; 27. Gear; 28. Air guide pipe; 29. ​​Air outlet; 30. Exhaust port; 31. Air collecting ring; 32. Sealing ring; 33. Air inlet pipe; 34. Magnetic ring; 35. Electromagnet; 36. Support column; 37. Laser head. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0033] like Figures 1-6 As shown in the figure, an embodiment of the present invention discloses a positioning and welding equipment for optical module manufacturing and processing, including a frame 1, on which a first positioning mechanism for positioning a tube base and a second positioning mechanism for positioning a tube cap are provided, as well as a laser welding assembly for welding the tube base and the tube base. The frame 1 is equipped with a central shaft 2 for driving the rotation of the first positioning mechanism and the second positioning mechanism. The first positioning mechanism includes a first positioning ring 4 and a rotating mechanism for driving the first positioning ring 4 to rotate. A clamping ring 5 is provided on the inner circle of the first positioning ring 4. The first positioning mechanism also includes a second positioning ring 7 for fixing the pipe seat and a heat dissipation mechanism for cooling the weld. The inner circle of the second positioning ring 7 is provided with a support ring 8. The second positioning mechanism includes a third positioning ring 10 for fixing the pipe cap, and a sealing cap 14 fitted onto the third positioning ring 10. A support plate 11 is provided on the inner circle of the third positioning ring 10. The third positioning ring 10 and the first positioning ring 4 are movable relative to the second positioning ring 7. The laser welding assembly includes a laser head 37.

[0034] In the specific implementation process, such as Figure 8 As shown, the tube socket is inverted and placed on the second positioning ring 7, that is, the pins of the tube socket face upwards, and the second positioning ring 7 and the supporting ring 8 fix the tube socket. Invert the cap and place it on the third positioning ring 10, that is, make the lens on the cap face down, and the third positioning ring 10 and the support plate 11 fix the cap. Both the first positioning ring 4 and the third positioning ring 10 move toward the second positioning ring 7. When the first positioning ring 4 moves to abut against the second positioning ring 7, the clamping ring 5 on the first positioning ring 4 will fit against the tube seat, and the support ring 8 can clamp the tube seat. Meanwhile, the third positioning ring 10 will drive the cap to move until the cap and the seat are in contact. After the cap and seat are positioned and connected, the central shaft 2 drives the first and second positioning mechanisms to rotate, rotating the positioned cap and seat to the laser head 37. The laser beam emitted by the laser head 37 is focused on the contact edge of the cap and seat to form a continuous molten pool. During the welding process, the rotating mechanism can drive the cap and seat to rotate 360° as a whole through the clamping ring 5 and the support plate 11, thereby forming a continuous weld.

[0035] After welding is completed, such as Figure 9 As shown, since the sealing cover 14 moves synchronously with the third positioning ring 10, after the sealing cover 14 engages with the second positioning ring 7, an annular cavity is formed, surrounding the weld. At this time, a protective gas is continuously introduced into the annular cavity through the heat dissipation mechanism. On the one hand, it can isolate the outside air from entering and prevent the weld from being oxidized; on the other hand, it can cool the weld, thereby reducing the duration of thermal stress. During the cooling period, the first positioning ring 4 and the third positioning ring 10 can rotate the next set of tube caps and tube seats to the laser head 37 for welding.

[0036] After the entire operation is completed, the first positioning ring 4 and the third positioning ring 10 move in opposite directions and reset so that the welded product can be removed.

[0037] The placement of the aforementioned pipe seats and caps, as well as the removal of the welded products, can be done manually or by using a robotic arm; no specific method is specified here.

[0038] The laser welding assembly also includes a laser, a motion control system, a vision alignment system, and a cooling system. The laser converts electrical energy into laser energy, outputting a stable laser beam to the laser head 37. The motion control system and vision alignment system ensure the precise movement of the laser beam, guaranteeing weld quality. The cooling system cools the laser and laser head 37 to prevent damage from overheating. All of these system components can utilize mature products from existing technologies, and will not be described in detail here.

[0039] In one specific embodiment of the present invention, the bottom end of the central shaft 2 extends into the frame 1 and is connected to the bearing of the frame 1. The central shaft 2 has a hollow structure and a double helical lead screw 16 is inserted inside. The wall of the central shaft 2 is provided with a first through groove 17 for the first connecting block 19 to pass through and a second through groove 21 for the second connecting block 23 to pass through. A first movable sleeve 18 and a second movable sleeve 22 are sleeved on the central shaft 2. The lead screw 16 is connected to a first nut sleeve 20 and a second nut sleeve 24. The outer wall of the first nut sleeve 20 is welded and fixed to the inner wall of the first movable sleeve 18 through a first connecting block 19. The outer wall of the second nut sleeve 24 is welded and fixed to the inner wall of the second movable sleeve 22 through a second connecting block 23.

[0040] Specifically, such as Figure 2 and Figure 7 As shown, a servo motor for driving the rotation of the central shaft 2 and the lead screw 16 is also installed inside the frame 1. The servo motor drives the central shaft 2 to rotate through the gear set, thereby driving the rotation of the first positioning mechanism and the second positioning mechanism. This enables continuous welding operations and helps to improve work efficiency. The first connecting block 19 can slide vertically along the first through groove 17, and the second connecting block 23 can slide vertically along the second through groove 21. That is, both the first nut sleeve 20 and the second nut sleeve 24 are vertically movable structures. When the servo motor drives the lead screw 16 to rotate via the coupling, it can push the first nut sleeve 20 and the second nut sleeve 24 to move closer or further apart. The first nut sleeve 20 drives the first movable sleeve 18 to move synchronously via the first connecting block 19, while the second nut sleeve 24 drives the second movable sleeve 22 to move synchronously via the second connecting block 23. The servo motor on the lead screw 16 is a non-brake structure, so that when the central shaft 2 rotates, the lead screw 16 can rotate freely, thereby ensuring that the first movable sleeve 18 and the second movable sleeve 22 can rotate synchronously.

[0041] In one specific embodiment of the present invention, multiple first and second positioning mechanisms are arranged in a ring around the central axis 2. The first positioning mechanism further includes a hollow first fixing strip 3 and a hollow second fixing strip 6, and the second positioning mechanism further includes a third fixing strip 9. The first fixing strip 3 is welded and fixed to the outer wall of the first movable sleeve 18, one end of the second fixing strip 6 is welded and fixed to the central shaft 2, and one end of the third fixing strip 9 is welded and fixed to the outer wall of the second movable sleeve 22.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, when the central shaft 2 rotates, the first movable sleeve 18 and the second movable sleeve 22 will rotate synchronously. The central shaft 2 drives the second fixed strip 6 to rotate, and the first movable sleeve 18 and the second movable sleeve 22 drive the first fixed strip 3 and the third fixed strip 9 to rotate respectively. In this way, the first fixed strip 3, the second fixed strip 6 and the third fixed strip 9 can remain synchronous, ensuring that the cap and the seat will not deviate when rotating around the central shaft 2.

[0043] In one specific embodiment of the present invention, the first positioning ring 4, the second positioning ring 7 and the third positioning ring 10 are coaxial, the first positioning ring 4 is integrally formed with the clamping ring 5, the second positioning ring 7 is integrally formed with the supporting ring 8, and the inner circle of the third positioning ring 10 is in contact with the outer circular wall of the supporting plate 11.

[0044] Specifically, such as Figure 1 and Figure 8 As shown, when both the first positioning ring 4 and the third positioning ring 10 move toward the second positioning ring 7, they can maintain coaxial movement. Since the tube seat and tube cap have already been positioned, this movement ensures that the tube seat and tube cap can be coaxially connected. The first positioning ring 4 and the clamping ring 5 are designed as a single unit, allowing the first positioning ring 4 to drive the clamping ring 5 to rotate synchronously. The clamping ring 5, together with the support plate 11, enables the overall rotation of the pipe seat and the pipe cap. To ensure smooth rotation, the inner walls of the second positioning ring 7 and the supporting ring 8 are electroplated or polished to reduce frictional resistance and improve surface lubricity, thereby reducing friction with the pipe seat and ensuring smooth overall rotation of the pipe seat and pipe cap.

[0045] In one specific embodiment of the present invention, a vertical rod 12 is welded and fixed on the third fixing strip 9. The top end of the vertical rod 12 is connected to the bearing of the support plate 11. A movable ring 13 is sleeved on the vertical rod 12. A magnetic ring 34 is fixed on the top surface of the movable ring 13. Support columns 36 are provided on the bottom surface of the movable ring 13 on both sides of the magnetic ring 34.

[0046] Specifically, such as Figure 5As shown, when the third fixed bar 9 moves upward with the second movable sleeve 22, it will drive the movable ring 13 to move through the support column 36. At the same time, it will also drive the support plate 11 to move synchronously through the upright 12. Since the bottom of the sealing cap 14 is open, the bottom of the sealing cap 14 is welded and fixed to the movable ring 13. The opening at the bottom of the sealing cap 14 is welded and fixed to the outer circular wall of the third positioning ring 10. In this way, the third positioning ring 10 moves synchronously with the movable ring 13, which means that the third positioning ring 10 and the support plate 11 move together to drive the pipe cap to move, ensuring that the pipe cap will not fall off or shift during the movement.

[0047] In one specific embodiment of the present invention, a sealing step 15 is provided at the top edge of the sealing cover 14, and an electromagnet 35 is fixed on the surface of the third fixing strip 9 directly below the magnet ring 34.

[0048] Specifically, such as Figure 5 , Figure 6 and Figure 9 As shown, after the welding operation is completed, the electromagnet 35 is energized and operates. The opposite sides of the electromagnet 35 and the magnet ring 34 are the same magnetic poles, which generate a repulsive force. The repulsive force pushes the movable ring 13 to move upward along the upright rod 12, and the sealing cover 14 moves synchronously until the sealing step 15 on the sealing cover 14 engages with the bottom edge of the second positioning ring 7. In this way, the sealing cover 14 and the second positioning ring 7 can form an annular cavity around the pipe cap, which is used to form a subsequent heat dissipation channel.

[0049] In one specific embodiment of the present invention, the rotating mechanism includes a gear ring 26 located inside the first fixing bar 3 and a gear 27 meshing with the gear ring 26. The gear ring 26 is sleeved and fixed on the outer circular wall of the first positioning ring 4. A fixed shaft 25 is fitted and connected in the shaft hole of the gear 27. The two ends of the fixed shaft 25 are connected to the bearings of the wall of the first fixing bar 3. The first positioning ring 4 passes through the first fixing bar 3 and is connected to the bearings of the first fixing bar 3.

[0050] Specifically, such as Figure 3 As shown, the first fixing bar 3 is also equipped with a motor for driving the fixed shaft 25 to rotate (not shown in the figure). When the motor drives the fixed shaft 25 to rotate, the fixed shaft 25 drives the gear 27 to rotate. The gear 27 drives the first positioning ring 4 to rotate on the first fixing bar 3 by meshing with the gear ring 26.

[0051] In one specific embodiment of the present invention, the heat dissipation mechanism includes an air guide pipe 28 located within the second fixing strip 6, and an air collecting ring 31 sleeved on the central shaft 2. The air collecting ring 31 is hollow, and its inner circular wall is welded and fixed to the end face of the second fixing strip 6. The outer circular wall of the air collecting ring 31 is open and is sealed with a sealing ring 32. One end of the air guide tube 28 extends from the second fixing strip 6 and is welded to the inner circular wall of the air collecting ring 31. The sealing ring 32 is welded to the air inlet tube 33.

[0052] Specifically, such as Figure 1 and 9 As shown, a gas collecting chamber is formed between the gas collecting ring 31 and the sealing ring 32. The air inlet pipe 33 is connected to an external air source to introduce protective gas into the gas collecting chamber. A solenoid valve is provided on the air guide pipe 28. When the solenoid valve is opened, the protective gas in the gas collecting chamber can be introduced into the air guide pipe 28.

[0053] In one specific embodiment of the present invention, the second positioning ring 7 passes through the second fixing strip 6 and is welded and fixed to the second fixing strip 6. The second positioning ring 7 and the supporting ring 8 are an integral hollow structure. The outer circular wall of the second positioning ring 7 is welded and connected to the air guide pipe 28. The inner circular wall of the supporting ring 8 is provided with a tangentially designed air outlet 29, and the outer circular wall of the sealing cover 14 is provided with an exhaust hole 30.

[0054] Specifically, such as Figure 4 , Figure 5 and Figure 9 As shown, the protective gas in the gas guide pipe 28 can be introduced into the interior of the second positioning ring 7 and the supporting ring 8, and finally ejected into the aforementioned annular cavity through the vent hole 29. Since the vent hole 29 is tangentially arranged, the ejected airflow can flow along the tangential direction of the weld, avoiding direct impact of the airflow on the pipe cap. The protective gas is finally discharged through the exhaust hole 30. In this way, the weld can be prevented from contacting air and oxidizing. Meanwhile, because the instantaneous temperature in the weld area reaches 1500–2000℃ during welding, forming a huge temperature gradient with other areas of the pipe seat and cap, the weld metal is rigidly constrained by the surrounding cold base material when it solidifies and shrinks. This constraint generates tensile stress, which acts on the weld and causes cracks, and is also transmitted to the optical components through the structure. The VCSEL / PD chips and gold wire bonding points in the optical module are extremely sensitive to thermal stress. By continuously introducing protective gas, the heat at the weld can be carried away, reducing the duration of thermal stress and thus preventing damage to the chip and gold wire bonding in the optical module.

[0055] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A positioning and welding equipment for optical module manufacturing and processing, comprising a frame (1), wherein the frame (1) is provided with a first positioning mechanism for positioning a tube seat, a second positioning mechanism for positioning a tube cap, and a laser welding assembly for welding the tube seat and the tube seat. Its features are: The frame (1) is provided with a central shaft (2) for driving the first positioning mechanism and the second positioning mechanism to rotate. The first positioning mechanism includes a first positioning ring (4) and a rotating mechanism for driving the first positioning ring (4) to rotate. A clamping ring (5) is provided on the inner circle of the first positioning ring (4). The first positioning mechanism also includes a second positioning ring (7) for fixing the pipe seat and a heat dissipation mechanism for cooling the weld. The second positioning ring (7) has a support ring (8) at its inner circle. The second positioning mechanism includes a third positioning ring (10) for fixing the pipe cap, and a sealing cap (14) sleeved on the third positioning ring (10). A support plate (11) is provided on the inner circle of the third positioning ring (10). The third positioning ring (10) and the first positioning ring (4) are movable relative to the second positioning ring (7). The laser welding assembly includes a laser head (37).

2. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The bottom end of the central shaft (2) extends into the frame (1) and is connected to the bearing of the frame (1). The central shaft (2) is a hollow structure and a double helical screw (16) is inserted inside. The wall of the central shaft (2) is provided with a first through groove (17) for the first connecting block (19) to pass through and a second through groove (21) for the second connecting block (23) to pass through. A first movable sleeve (18) and a second movable sleeve (22) are sleeved on the central shaft (2). The lead screw (16) is connected to a first nut sleeve (20) and a second nut sleeve (24). The outer wall of the first nut sleeve (20) is welded and fixed to the inner wall of the first movable sleeve (18) through a first connecting block (19). The outer wall of the second nut sleeve (24) is welded and fixed to the inner wall of the second movable sleeve (22) through a second connecting block (23).

3. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The first positioning mechanism and the second positioning mechanism are distributed in a ring around the central axis (2). The first positioning mechanism also includes a first fixing strip (3) and a second fixing strip (6) with hollow structure, and the second positioning mechanism also includes a third fixing strip (9). The first fixing strip (3) is welded to the outer wall of the first movable sleeve (18), one end of the second fixing strip (6) is welded to the central shaft (2), and one end of the third fixing strip (9) is welded to the outer wall of the second movable sleeve (22).

4. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The first positioning ring (4) passes through the first fixing strip (3) and is connected to the bearing of the first fixing strip (3). The second positioning ring (7) passes through the second fixing strip (6) and is welded and fixed to the second fixing strip (6).

5. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The first positioning ring (4), the second positioning ring (7) and the third positioning ring (10) are coaxial. The first positioning ring (4) is integrally formed with the pressing ring (5), the second positioning ring (7) is integrally formed with the supporting ring (8), and the inner circle of the third positioning ring (10) is in contact with the outer wall of the supporting plate (11).

6. The positioning and welding equipment for optical module manufacturing and processing according to claim 3, characterized in that: A pole (12) is welded and fixed on the third fixing strip (9). The top of the pole (12) is connected to the bearing of the support plate (11). A movable ring (13) is sleeved on the pole (12). A magnet ring (34) is fixed on the top surface of the movable ring (13). Support columns (36) are provided on the bottom surface of the movable rings (13) on both sides of the magnet ring (34). An electromagnet (35) is fixed on the surface of the third fixing strip (9) directly below the magnet ring (34).

7. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The sealing cover (14) has a sealing step (15) at the top edge, and an exhaust hole (30) is provided on the outer circular wall of the sealing cover (14). The bottom end of the sealing cover (14) is open. The bottom end of the sealing cover (14) is welded and fixed to the movable ring (13). The bottom opening of the sealing cover (14) is welded and fixed to the outer circular wall of the third positioning ring (10).

8. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The rotating mechanism includes a gear ring (26) located in the first fixed bar (3) and a gear (27) meshing with the gear ring (26). The gear ring (26) is sleeved and fixed on the outer circular wall of the first positioning ring (4). A fixed shaft (25) is connected in the shaft hole of the gear (27). Both ends of the fixed shaft (25) are connected to the bearings of the wall of the first fixed bar (3).

9. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The heat dissipation mechanism includes an air guide pipe (28) located inside the second fixing strip (6) and an air collecting ring (31) sleeved on the central shaft (2). The air collecting ring (31) is hollow. The inner circular wall of the air collecting ring (31) is welded and fixed to the end face of the second fixing strip (6). The outer circular wall of the air collecting ring (31) is open and is sealed with a sealing ring (32) in a bearing seal. One end of the air guide tube (28) extends from inside the second fixing strip (6) and is welded to the inner circular wall of the air collecting ring (31). The sealing ring (32) is welded to the air inlet pipe (33).

10. The positioning and welding equipment for optical module manufacturing and processing according to claim 1, characterized in that: The second positioning ring (7) and the supporting ring (8) are an integral hollow structure. The outer circular wall of the second positioning ring (7) is welded and connected to the air guide pipe (28). The inner circular wall of the supporting ring (8) is provided with a tangentially designed air outlet (29).

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