Cylindrical lens automatic supply device and laser assembly equipment

Abstract

The present application relates to an automatic cylindrical lens supply device and laser assembly equipment, and relates to the field of laser technology. The automatic cylindrical lens supply device includes a base plate and a servo motor, a feeding mechanism and a positioning mechanism installed on the base plate. The feeding mechanism includes a transmission shaft and at least one pair of feeding wheels. A channel for the cylindrical lens to pass through is formed between each pair of feeding wheels. The servo motor drives the two feeding wheels of each pair to rotate in opposite directions through the transmission shaft. The positioning mechanism includes a positioning pin connected to the base plate, and the positioning pin and the channel are on the same vertical line. The laser assembly equipment includes an automatic cylindrical lens supply device and an assembly mechanism. The assembly mechanism includes a screw and a slider. The screw and the transmission shaft are connected to the servo motor through a transmission mechanism. The slider is provided with a mounting hole, and one end of the slider with the mounting hole can be moved to the bottom of the channel of the feeding wheel. A one-way coupling is provided between the transmission shaft and the transmission mechanism. The application has the advantage of improving the assembly accuracy of laser production.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and in particular to an automatic cylindrical lens supply device and laser assembly equipment. Background Art

[0002] Laser is a device that can emit laser light. Laser collimation technology plays a key role in lasers, turning divergent light into collimated light. Laser spot collimation is the process of converting the divergent light spot into a basically parallel one through a cylindrical lens.

[0003] For related technology, see patent application number 201710105865.8, which discloses a laser collimation device and a collimation method, wherein the collimation device includes an adjustment table and a detection device. The relative positions of the fiber optic cylindrical lens and the laser light source are adjusted by the adjustment table, and the far-field light spot is observed by the detection device to determine the optimal collimation position of the cylindrical lens. Finally, ultraviolet curing glue is used to dispense glue to fix the fiber optic cylindrical lens on the laser module.

[0004] Regarding the above-mentioned related technologies, in the actual production process, due to the extremely small diameter of the cylindrical lens, clamping and feeding are difficult, which affects the production efficiency of laser products. Summary of the invention

[0005] In order to improve the problem that the feeding of cylindrical lenses is difficult during the current laser production and affects the laser production efficiency, the present application provides an automatic cylindrical lens feeding device and a laser assembly device.

[0006] In the first aspect, the present application provides an automatic cylindrical lens supply device adopting the following technical solution:

[0007] A cylindrical lens automatic supply device, comprising:

[0008] Base plate;

[0009] A feeding mechanism is mounted on the bottom plate, the feeding mechanism comprises a transmission shaft and at least one pair of feeding wheels, and a channel for the cylindrical lens to pass through is formed between each pair of feeding wheels;

[0010] A servo motor is mounted on the bottom plate, and the servo motor drives the two feed wheels of each pair to rotate in opposite directions through a transmission shaft;

[0011] The positioning mechanism comprises a positioning pin connected to the bottom plate, wherein the positioning pin and the channel are on the same vertical line.

[0012] In the second aspect, the present application provides a laser assembly device that adopts the following technical solution:

[0013] A laser assembly device includes the above-mentioned cylindrical lens automatic feeding device and an assembly mechanism, the assembly mechanism includes a lead screw rotatably supported on a base plate and a slider threadedly connected to the lead screw, the lead screw and a transmission shaft are connected to a servo motor through a transmission mechanism, an end of the slider close to the positioning mechanism is provided with a mounting hole for fixing a laser plug-in socket, and the end of the slider with the mounting hole can be moved to the bottom of the channel of the feed wheel; a one-way coupling is provided between the transmission shaft and the transmission mechanism.

[0014] By adopting the above technical solution, the initial position of the laser plug-in socket is the loading position. The laser plug-in socket is manually installed at the mounting hole, and the cylindrical lens is inserted into the channel of a pair of feed wheels. The cylindrical lens is positioned by the positioning pin, and the servo motor is started. The servo motor rotates forward, and is transmitted to the feeding mechanism and the assembly mechanism respectively through the transmission mechanism. The pair of feed wheels of the feeding mechanism rotates and drives the cylindrical lens to move downward to complete automatic feeding; at the same time, the screw rod converts the positive rotation into the positive translation of the slider, and sends the laser plug-in socket to the working position. By designing the transmission ratio of the transmission mechanism, the feeding amount of the cylindrical lens and the displacement of the laser plug-in socket can be accurately controlled to achieve that the laser plug-in socket just reaches the working position when the cylindrical lens feeding is completed.

[0015] After the cylindrical lens completes the dispensing and curing, and the cylindrical lens is cut off, the servo motor reverses, and the laser plug-in seat is returned to the loading position through the screw rod and the slider. At the same time, because the transmission shaft and the transmission mechanism are connected by a one-way coupling, the reverse movement will not be transmitted to the transmission shaft, and the cylindrical lens will not retract. After the laser is manually removed, the next working cycle can be started.

[0016] In summary, the present application has the following beneficial technical effects: the cylindrical lens with extremely small diameter can be automatically fed through the feeding mechanism, and the loading and alignment of the laser socket can be synchronously completed through the laser assembly equipment, thereby improving the installation accuracy of the cylindrical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the laser assembly equipment according to the embodiment of the present application;

[0018] Figure 2 for Figure 1 A front view of

[0019] Figure 3 for Figure 2 Sectional view along AA direction;

[0020] Figure 4 for Figure 3 Enlarged view of part B in the middle.

[0021] Description of reference numerals:

[0022] 1. Base plate; 11. Bracket; 12. Support; 13. Fixing frame; 2. Servo motor; 3. Coupling; 4. Transmission mechanism; 41. Spindle; 42. Driving pulley; 43. Transmission belt; 44. Driven pulley; 5. Feed mechanism; 51. Transmission shaft; 52. One-way coupling; 53. First transmission wheel; 54. Second transmission wheel; 6. Positioning mechanism; 61. First positioning pin; 62. Second positioning pin; 63. Mounting block; 64. Sensor switch; 7. Assembly mechanism; 71. Bearing seat; 72. Screw rod; 73. Slider; 8. Cylindrical lens; 9. Laser plug socket; 91. Connecting end. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-4 This application is described in further detail.

[0024] The embodiment of the present application discloses a laser assembly device.

[0025] refer to Figure 1 and Figure 2 The laser assembly equipment includes a base plate 1 and a transmission mechanism 4, a feeding mechanism 5, a positioning mechanism 6 and an assembly mechanism 7 installed on the base plate 1. The main shaft 41 of the transmission mechanism 4 is connected to the servo motor 2 through a coupling 3, and the feeding mechanism 5 and the assembly mechanism 7 are connected to the servo motor 2 through the transmission mechanism 4.

[0026] The transmission mechanism 4 is a belt transmission mechanism, and the transmission mechanism 4 includes a driving pulley 42, a driven pulley 44 and a transmission belt 43. The main shaft 41 is coaxially connected with the driving pulley 42. A bracket 11 is fixedly mounted on the bottom plate 1, and the driven pulley 44 is rotatably connected to the bracket 11. In other embodiments, the transmission mechanism 4 can also be a gear transmission.

[0027] The feeding mechanism 5 includes a transmission shaft 51 and at least one pair of feeding wheels, and a channel for the cylindrical lens 8 to pass through is formed between each pair of feeding wheels. Each pair of feeding wheels is composed of a first transmission wheel 53 and a second transmission wheel 54, the first transmission wheel 53 is connected to the transmission shaft 51 as a driving wheel, and the second transmission wheel 54 abuts against the first transmission wheel 53 and transmits through friction. A fixing frame 13 is fixed on the bottom plate 1, and the first transmission wheel 53 and the second transmission wheel 54 are rotatably connected to the fixing frame 13, and the central axes of the first transmission wheel 53 and the second transmission wheel 54 are parallel to the axis of the transmission shaft 51. A rubber layer is provided on the surface of the first transmission wheel 53 and the second transmission wheel 54 located in the channel. On the one hand, the rubber layer on the surface of the transmission wheel can prevent the surface of the cylindrical lens 8 from being damaged during the transmission process; on the other hand, the rubber surface is relatively soft, which increases the contact area with the surface of the cylindrical lens 8, improves the friction, and achieves the purpose of positioning and transmitting the extremely fine columnar material. In other embodiments, the rubber layer can also be replaced by other flexible protective layer materials such as a silicone layer, a flannel layer, etc.

[0028] The first transmission wheel 53 and the second transmission wheel 54 are provided with grooves along the circumference, and the grooves may be semicircular grooves, and the contact points of the two semicircular grooves together form a circular channel. Preferably, the diameter of the channel may be as small as 125 um.

[0029] refer to Figure 3 and Figure 4 The positioning mechanism 6 includes a positioning pin connected to the bottom plate 1, and the positioning pin and the channel are on the same vertical line. The positioning mechanism 6 includes a mounting block 63, and there are two positioning pins on each channel, one is fixed on the bottom plate 1 and located below the feed wheel, called the first positioning pin 61; the other is fixed to the bottom plate 1 through the mounting block 63 and located between the feed wheel and the bottom plate 1, called the second positioning pin 62.

[0030] The base plate 1 is provided with a support 12, and the mounting block 63 can be fixed in position after sliding in the vertical direction relative to the support 12. Specifically, the support 12 is provided with a guide rail in the vertical direction, and the mounting block 63 is provided with a slide groove that cooperates with the guide rail. The mounting block 63 can slide up and down along the guide rail. The mounting block 63 is also threaded with bolts. When the mounting block 63 slides to a suitable position, the mounting block 63 is fixed by tightening the bolts. In this way, the height of the movable second positioning pin 62 can be adjusted up and down, and the spacing between the two positioning pins can be adjusted, so as to control the shearing size of the cylindrical lens 8. In other embodiments, the sliding mode of the mounting block 63 and the support 12 can also be other forms, such as the support 12 is provided with a slide groove in the vertical direction, and the mounting block 63 is provided with a protrusion that cooperates with the slide groove.

[0031] The first positioning pin 61 can be directly fixed on the base plate 1, and a positioning hole is provided at the center of one end of the first positioning pin 61 away from the base plate 1. A socket is provided on the mounting block 63, and the second positioning pin 62 can be inserted into the socket. One end of the second positioning pin 62 can be cylindrical, and the other end can be conical. The second positioning pin 62 is provided with a penetrating through hole along the central axis, and the aperture of the through hole is slightly larger than the diameter of the cylindrical lens 8. A conical hole is connected to the end of the through hole close to the cone, and the aperture of the conical hole is slightly smaller than the diameter of the cylindrical lens 8, so that the slender cylindrical lens 8 can pass through the through hole and the conical hole, while the cylindrical lens 8 is clamped by the conical hole end of the second positioning pin 62.

[0032] refer to Figure 2, the assembly mechanism 7 includes a screw rod 72 rotatably supported on the bottom plate 1 and a slider 73 threadedly connected to the screw rod 72. The screw rod 72 and the transmission shaft 51 are connected to the servo motor 2 through the transmission mechanism 4. The end of the slider 73 close to the positioning mechanism 6 is provided with a mounting hole for fixing the laser plug-in socket 9. The end of the slider 73 with the mounting hole can be moved to the bottom of the channel of the feed wheel. The slider 73 can be a U-shaped structure. One end of the slider 73 is threadedly connected to the screw rod 72. The other end of the slider 73 is located outside the screw rod 72 and is arranged close to the feed wheel. The mounting hole is arranged on this end. A bearing seat 71 is fixedly installed on the bottom plate 1. Both ends of the screw rod 72 are rotatably supported on the bearing seat 71. One end of the screw rod 72 can be coaxially connected with the driving pulley 42. The bottom of the slider 73 is in sliding contact with the bottom plate 1. The specific structure can be that the contact surface between the bottom plate 1 and the slider 73 is smooth, or a guide rail is provided on the bottom plate 1, and a slide groove matching the guide rail is provided on the slider 73.

[0033] The transmission shaft 51 is coaxially connected to the driven pulley 44 , and a one-way coupling 52 is connected between the transmission shaft 51 and the driven pulley 44 .

[0034] The initial position of the laser plug-in socket 9 is the loading position. The laser plug-in socket 9 is manually installed at the mounting hole, and the cylindrical lens 8 is inserted into the channel of each pair of feed wheels. The cylindrical lens 8 is positioned by the positioning pin, and the servo motor 2 is started. The servo motor 2 rotates forward, and is transmitted to the feeding mechanism 5 and the assembly mechanism 7 respectively through the transmission mechanism 4. The pair of feed wheels of the feeding mechanism 5 rotates and drives the cylindrical lens 8 to move downward to complete the automatic feeding; at the same time, the screw 72 converts the positive rotation into the positive translation of the slider 73, and sends the laser plug-in socket 9 to the working position. By designing the transmission ratio of the transmission mechanism 4, the feeding amount of the cylindrical lens 8 and the displacement of the laser plug-in socket 9 can be accurately controlled to achieve that the laser plug-in socket 9 just reaches the working position when the cylindrical lens 8 is fed. The cylindrical lens 8 is fixed to the connection end 91 of the laser plug-in socket 9 by gluing.

[0035] After the cylindrical lens 8 completes the actions of dispensing and curing, cutting off the cylindrical lens 8, etc., the servo motor 1 reverses, and the laser plug-in seat 9 is returned to the loading position through the screw rod 72 and the slider 73. At the same time, because the transmission shaft 51 and the transmission mechanism 4 are connected by a one-way coupling 52, the reverse movement will not be transmitted to the transmission shaft 51, and the cylindrical lens 8 has no retraction action. After the laser is manually removed, the next working cycle can be started.

[0036] Specifically, the design can be as follows: the laser is installed in the initial position, the light-emitting surface is about 20mm away from the optical fiber, the transmission ratio of the transmission mechanism 4 is set to 1:2, the servo motor 2 control program is set, and the displacement speed of the laser plug-in socket 9 is divided into two gears, moving at a speed of 5mm / s in the range of 0-19mm; it translates at a speed of 0.01mm / s within 1mm at the end. At this time, the laser plug-in socket 9 is powered on and the light emitted by the laser plug-in socket 9 is collimated after passing through the cylindrical lens 8. When the collimated light spot meets the requirements, the servo motor 2 stops rotating; at the same time, the feeding mechanism 5 connected to the transmission mechanism 4 drives the cylindrical lens 8 to move downward to complete the automatic feeding length of 9mm-10mm.

[0037] In order to prevent the laser plug socket 9 from shifting too much and causing the cylindrical lens 8 to bend, the positioning mechanism 6 also includes a sensor switch 64 fixedly mounted on the bottom plate 1. The sensor switch 64 can be installed close to the first positioning pin 61. When the surface of the slider 73 with the mounting hole at one end contacts the sensor switch 64, the servo motor 2 stops working to avoid erroneous operations such as laser over-positioning. The sensor switch 64 can be a contact sensor. In other embodiments, the sensor switch 64 can also be a proximity sensor.

[0038] In order to improve assembly efficiency, in other implementations, the feed wheels may be two pairs, three pairs or more in number, and the plurality of driven pulleys 44 are respectively connected to the driving pulley 42 by belt transmission.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser assembly device, characterized in that: It includes a cylindrical lens automatic supply device and an assembly mechanism (7), The cylindrical lens automatic supply device comprises: Bottom plate (1); A feeding mechanism (5) is mounted on the base plate (1), the feeding mechanism (5) comprising a transmission shaft (51) and at least one pair of feeding wheels, a channel for the cylindrical lens (8) to pass through is formed between each pair of feeding wheels; A servo motor (2) is mounted on the bottom plate (1), and the servo motor (2) drives the two feed wheels of each pair to rotate in opposite directions through a transmission shaft (51); A positioning mechanism (6), comprising a positioning pin connected to the bottom plate (1), wherein the positioning pin and the channel are on the same vertical line; The assembly mechanism (7) comprises a screw rod (72) rotatably supported on a base plate (1) and a slider (73) threadedly connected to the screw rod (72); the screw rod (72) and a transmission shaft (51) are connected to a servo motor (2) via a transmission mechanism (4); an end of the slider (73) close to the positioning mechanism (6) is provided with a mounting hole for fixing a laser plug-in socket (9); and the end of the slider (73) having the mounting hole can be moved to below the channel of the feed wheel; a one-way coupling (52) is provided between the transmission shaft (51) and the transmission mechanism (4).

2. The laser assembly equipment according to claim 1, characterized in that: Each pair of feeding wheels consists of a first transmission wheel (53) and a second transmission wheel (54); the first transmission wheel (53) is connected to the transmission shaft (51) as a driving wheel, and the second transmission wheel (54) abuts against the first transmission wheel (53) and transmits power through friction.

3. The laser assembly equipment according to claim 1 or 2, characterized in that: The positioning mechanism (6) comprises a mounting block (63), and each channel has two positioning pins, one of which is fixed on the bottom plate (1), and the other is fixed to the bottom plate (1) through the mounting block (63) and is located between the feed wheel and the bottom plate (1).

4. The laser assembly equipment according to claim 3, characterized in that: A support (12) is installed on the bottom plate (1), and the mounting block (63) can slide relative to the support (12) in a vertical direction and then be fixed in position.

5. The laser assembly equipment according to claim 1, 2 or 4, characterized in that: A flexible protective layer is provided on the surface of the feeding wheel located on the channel.

6. The laser assembly equipment according to claim 3, characterized in that: A flexible protective layer is provided on the surface of the feeding wheel located on the channel.

7. The laser assembly equipment according to claim 1, 2, 4 or 6, characterized in that: A sensor switch (64) is installed on the bottom plate (1), and the sensor switch (64) is electrically connected to the servo motor (2). When the end surface of the slider (73) having the installation hole contacts the sensor switch (64), the servo motor (2) stops working.

8. The laser assembly equipment according to claim 7, characterized in that: The distance between the light emitting surface and the optical fiber at the initial installation position of the laser plug-in socket (9) is L, and the control program of the servo motor (2) is as follows: the displacement speed of the slider (73) on the screw rod (72) close to the feed wheel is divided into two gears, moving at a speed of 5 mm / s in the range of 0~(L-1) mm, and translating at a speed of 0.01 mm / s within 1 mm at the end.

9. The laser assembly equipment according to claim 8, characterized in that: The transmission mechanism (4) is a pulley transmission mechanism, L is 20 mm, and the feeding length of the feeding mechanism (5) is 9 mm to 10 mm.

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