A special-shaped spot grating diffraction system

Abstract

The present invention relates to a grating diffraction system for a special-shaped light spot, including a primary shaping device and a secondary shaping device. The primary shaping device is arranged vertically, and an optical fiber interface for connecting a laser is provided at its upper end, and an outlet is provided at its lower end, and an opening is provided at one side of the primary shaping device, and the laser is injected from the optical fiber interface, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device is fixedly installed at the opening, and is used to perform secondary shaping on the laser after the primary shaping, and reflect it back to the primary shaping device, and the laser after the secondary shaping is reflected by the primary shaping device and then emitted from the outlet. The beneficial effects of the present invention are that the structure is compact, and multiple shaping and adjustment of the laser can be realized to obtain the required special-shaped light spot, thereby meeting different production needs, and the use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a special-shaped light spot grating diffraction system. Background Art

[0002] Laser soldering is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. It has been widely used in the field of electronic assembly, especially in the field of high-end electronic assembly. As the integration of circuits becomes higher and higher, the size of parts becomes smaller and smaller, and the pin spacing becomes smaller, it is difficult for previous tools to operate in a small space. Since laser soldering has excellent characteristics such as small heat-affected zone, low thermal stress, rapid heating concentration, high welding accuracy and welding efficiency, it can solve the above problems well, and thus shows its unique superiority in the field of electronic assembly.

[0003] As a crucial component of the laser soldering system, the structure of the optical system will have a significant impact on the product performance and work efficiency of the entire laser soldering system. However, the existing optical system can only produce a circular spot, which is difficult to meet the needs of welding special-shaped pads or narrow areas. If a circular spot is used to weld special-shaped pads, the pads may fall off due to uneven heating, which greatly affects the welding efficiency and welding accuracy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a special-shaped spot grating diffraction system, aiming to solve the above technical problem.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A grating diffraction system for an irregular light spot comprises a primary shaping device and a secondary shaping device. The primary shaping device is arranged vertically, and an optical fiber interface for connecting a laser is provided at its upper end, and an outlet is provided at its lower end, and an opening is provided at one side of the primary shaping device, and laser light is injected from the optical fiber interface, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device is fixedly installed at the opening, and is used to perform secondary shaping on the laser light after the primary shaping, and reflect it back to the primary shaping device, and the laser light after the secondary shaping is reflected by the primary shaping device and is emitted from the outlet.

[0007] The beneficial effects of the present invention are as follows: during welding, the laser is fixedly installed at the optical fiber interface and emits laser; the laser is injected from the optical fiber interface, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device performs secondary shaping on the laser after the primary shaping, and reflects it back to the primary shaping device, and the laser after the secondary shaping is reflected by the primary shaping device and then emitted from the outlet, so as to perform laser processing on the workpiece, and realize multiple shaping processing of the laser, so as to obtain a special-shaped light spot. The present invention has a compact structure, can realize multiple shaping of the laser, so as to obtain the required special-shaped light spot, thereby meeting different production needs, and is easy to use.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the preliminary shaping device includes a shell, the optical fiber interface and the outlet are respectively located at the upper end and the lower end of the shell, and the opening is located at one side of the shell.

[0010] The beneficial effect of adopting the above further solution is that the structure is simple and the installation and protection of various components are achieved through the shell.

[0011] Furthermore, the preliminary shaping device also includes two optical combination lenses, which are distributed in the shell at an interval up and down, and one end of each optical combination lens is fixedly connected to the shell, and the other end extends obliquely between the two and is perpendicular to each other; the opening is located between the other ends of the two optical combination lenses.

[0012] The beneficial effects of adopting the above further solution are simple structure, reasonable distribution of the two optical combination lenses, and effective change of the laser line to achieve multiple shaping of the laser.

[0013] Furthermore, it also includes a reflecting device and an optical adjusting device, the top and bottom of the reflecting device are respectively provided with an entrance and an emission port that penetrate inside and outside, and one side of the reflecting device is provided with a through hole that penetrates inside and outside; the preliminary shaping device is fixedly installed on the top of the reflecting device, and the outlet is connected with the entrance, and the laser after secondary shaping is injected into the reflecting device from the entrance and reflected to the through hole by the reflecting device; the optical adjusting device is fixedly installed at the through hole and is used to adjust the secondary shaped laser reflected by the reflecting device and send the adjusted laser to the reflecting device, and the reflecting device reflects the adjusted laser and emits it from the emission port.

[0014] The beneficial effect of adopting the above further solution is that during the welding process, the reflection device reflects the laser after secondary shaping to the optical adjustment device, which is adjusted by the optical adjustment device to obtain a more accurate laser landing point position.

[0015] Furthermore, a ring-shaped achromatic device is fixedly installed at the emission outlet.

[0016] The beneficial effect of adopting the above further scheme is to eliminate the chromatic aberration of two or more different wavelengths through the achromatic device, thereby achieving the purpose of multi-light convergence and overlap, and improving the effect of laser welding.

[0017] Furthermore, the reflecting device comprises a shell, the inlet and the outlet are respectively located at the top and the bottom of the shell, and the through hole is located at one side of the shell.

[0018] The beneficial effects of adopting the above further solution are simple structure, reasonable design and convenient installation of various components.

[0019] Furthermore, the reflecting device also includes two reflecting lenses, which are spaced up and down in the shell, and one end of each reflecting lens is fixedly connected to the shell, and the other end extends obliquely between the two and is perpendicular to each other; the through hole is located at the other end of the two reflecting lenses.

[0020] The beneficial effects of adopting the above further solution are simple structure, reasonable distribution of the two reflective lenses, and effective change of the laser line to achieve adjustment and improve the effect of laser welding.

[0021] Furthermore, the shell is provided with at least one mounting hole for connecting a mounting device.

[0022] The beneficial effects of adopting the above further solution are simple structure, reasonable design, convenient installation of the entire device on other devices, convenient disassembly and assembly, saving time and effort.

[0023] Furthermore, a temperature detection component for detecting the temperature of the laser is fixedly mounted on the optical adjustment device.

[0024] The beneficial effect of adopting the above further scheme is that the soldering point temperature and welding status can be monitored and checked in real time, and the detected data can be fed back to the central control system, and the output laser temperature can be adjusted according to the instructions conveyed by the central control system to achieve temperature control.

[0025] Furthermore, the temperature detecting component is a temperature sensor.

[0026] The beneficial effects of adopting the above further solution are simple structure, high accuracy and precise monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of the preliminary shaping device in the present invention;

[0029] Figure 3It is a schematic diagram of the internal structure of the reflection device in the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. Secondary shaping device, 2. Optical fiber interface, 3. Optical combination lens, 4. Housing, 5. Optical adjustment device, 6. Achromatic device, 7. Mounting hole, 8. Reflective lens, 9. Housing, 10. Temperature detection component. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings and specific embodiments. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0033] like Figures 1 to 3 As shown, the present invention provides a grating diffraction system for a special-shaped light spot, including a primary shaping device and a secondary shaping device 1. The primary shaping device is vertically arranged, and an optical fiber interface 2 for connecting a laser is provided at its upper end, and an outlet is provided at its lower end, and an opening is provided at one side of the primary shaping device. Laser light is injected from the optical fiber interface 2, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device 1 is fixedly installed at the opening by bolts, and is used to perform secondary shaping on the laser light after the primary shaping, and reflect it back to the primary shaping device, and the laser light after the secondary shaping is reflected by the primary shaping device and is emitted from the outlet. During welding, the laser is fixedly installed at the optical fiber interface 2 by bolts and emits laser; the laser is injected from the optical fiber interface 2, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device 1 performs secondary shaping on the laser after the primary shaping, and reflects it back to the primary shaping device, and the laser after the secondary shaping is reflected by the primary shaping device and then emitted from the outlet to perform laser processing on the workpiece, realizing multiple shaping processing of the laser, so as to obtain a special-shaped light spot. The present invention has a compact structure, can realize multiple shaping of the laser, so as to obtain the required special-shaped light spot, thereby meeting different production needs, and is easy to use.

[0034] The secondary shaping device 1 is a grating system, which can be grating plates of different types or combined grating plates, so that the light passing through the grating can obtain the required second different optical form.

[0035] In addition, the above-mentioned grating system adopts the existing technology, and its specific structure and principle are not described in detail here.

[0036] Example 1

[0037] Based on the above structure, in this embodiment, the preliminary shaping device includes a housing 4, the optical fiber interface 2 and the outlet are respectively located at the upper end and the lower end of the housing 4, and the opening is located at one side of the housing. This scheme has a simple structure, and the housing is used to install various components and protect the two optical combination lenses 3.

[0038] Example 2

[0039] On the basis of the first embodiment, in this embodiment, the preliminary shaping device further includes two optical combination lenses 3, which are spaced apart in the housing 4 in a manner that can be imagined by a person skilled in the art, and one end of which is fixedly connected to the housing 4 (bolted or welded), and the other end of which extends obliquely between the two and is perpendicular to each other; the opening is located at the other end of the two optical combination lenses 3. This solution has a simple structure, and the two optical combination lenses 3 are reasonably distributed, which effectively changes the line of the laser so as to achieve multiple shaping of the laser.

[0040] The housing 4 is preferably a cylindrical casing.

[0041] Example 3

[0042] On the basis of the above structure, the present embodiment further includes a reflecting device and an optical adjustment device 5. The top and bottom of the reflecting device are respectively provided with an inlet and an outlet that penetrate inside and outside, and one side thereof is provided with a through hole that penetrates inside and outside; the preliminary shaping device is fixedly installed on the top of the reflecting device by bolts, and the outlet is connected with the inlet, and the laser after secondary shaping is injected into the reflecting device from the inlet and reflected to the through hole by the reflecting device; the optical adjustment device 5 is fixedly installed at the through hole by bolts, and is used to adjust the secondary shaping laser reflected by the reflecting device, and send the adjusted laser to the reflecting device, and the reflecting device reflects the adjusted laser and emits it from the outlet. During the welding process, the reflecting device reflects the laser after secondary shaping to the optical adjustment device 5, which is adjusted by the optical adjustment device 5 to obtain a more accurate laser landing point position.

[0043] Example 4

[0044] On the basis of the third embodiment, in this embodiment, a ring-shaped achromatic device 6 is fixedly installed at the injection port by bolts. During welding, the achromatic device 6 eliminates the chromatic aberration of two or more different wavelengths, thereby achieving the purpose of multi-light convergence and overlap, and improving the effect of laser welding.

[0045] The above-mentioned achromatic device 6 is an achromatic lens group. The achromatic lens group adopts the existing technology, and its specific structure and principle are not described in detail here. The achromatic lens group uses a combination of flint glass, crown glass and other lenses to eliminate the chromatic aberration of two or more different wavelengths, so as to achieve the purpose of multi-light convergence and overlap.

[0046] Example 5

[0047] On the basis of the third embodiment, in this embodiment, the reflection device includes a shell 9, the inlet and the outlet are respectively located at the top and the bottom of the shell 9, and the through hole is located on one side of the shell 9. It has a simple structure and a reasonable design, and is convenient for installing two reflection lenses.

[0048] The housing 9 is preferably a rectangular parallelepiped housing.

[0049] Example 6

[0050] On the basis of the fifth embodiment, in this embodiment, the reflecting device further includes two reflecting lenses 8, which are spaced apart in the upper and lower parts of the housing 9, and one end of which is fixedly connected to the housing 9 (welded or bolted), and the other end of which is inclined and extends between the two and is perpendicular to each other; the through hole is located at the other end of the two reflecting lenses 8. This solution has a simple structure, and the two reflecting lenses 8 are reasonably distributed, which effectively changes the line of the laser to achieve adjustment and improve the effect of laser welding.

[0051] Example 7

[0052] On the basis of the fifth embodiment, in this embodiment, at least one mounting hole 7 for connecting the mounting device is provided on the shell 9, which has a simple structure and reasonable design, and is convenient for installing the entire device on other devices, and is easy to disassemble and assemble, saving time and effort.

[0053] Preferably, the number of the above-mentioned mounting holes 7 can be one or more, preferably more, to increase the stability of the installation;

[0054] In addition, the mounting holes 7 are preferably screw holes.

[0055] Example 8

[0056] On the basis of the third embodiment, in this embodiment, a temperature detection member 10 for detecting the laser temperature is fixedly installed on the optical adjustment device 5 by bolts. During welding, the temperature detection member 10 can monitor and check the temperature of the welding point and the welding state in real time, and feed back the detected data to the central control system, and adjust the emitted laser temperature according to the instructions conveyed by the central control system to achieve temperature control.

[0057] When in use, the temperature detection component 10 and the laser are connected to the central control system respectively by lines or wireless connections; during the monitoring process, the temperature detection component 10 sends the corresponding temperature signal to the central control system, and the central control system receives the corresponding temperature signal and compares and analyzes it. When the temperature exceeds the set threshold (designed according to requirements), the power of the laser emitted by the laser is adjusted through the central control system to adjust the temperature of the laser and ensure the quality of the welding of the workpiece.

[0058] Preferably, in this embodiment, the temperature detection element 10 is a temperature sensor with a simple structure, high accuracy and precise monitoring.

[0059] The working principle of the present invention is as follows:

[0060] During welding, the laser is fixedly installed at the optical fiber interface 2 by bolts and emits laser; the laser is injected from the optical fiber interface 2, and is reflected to the opening after being shaped once by the primary shaping device; the secondary shaping device 1 performs secondary shaping on the laser after the primary shaping, and reflects it to the primary shaping device, and the laser after the secondary shaping is reflected by the primary shaping device and then emitted from the outlet;

[0061] The reflecting device reflects the laser light after secondary shaping to the optical adjusting device 5, which adjusts the laser light and sends the adjusted laser light to the reflecting device, which reflects the adjusted laser light and emits it from the emission port. The laser light emitted from the emission port is eliminated by the achromatic device 6 to eliminate the color difference of two or more different wavelengths, and then the workpiece is laser welded.

[0062] During the laser welding process, the temperature of the laser is monitored in real time by the temperature detection element 10, and the corresponding temperature signal is sent to the central control system. The central control system receives the corresponding temperature signal and compares and analyzes it. When the temperature exceeds the set threshold (designed according to demand), the power of the laser emitted by the laser is adjusted by the central control system to adjust the temperature of the laser and ensure the quality of the welding of the workpiece.

[0063] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected to the central control system, and the control circuits between the central control system and each component are the existing technology.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A grating diffraction system with a special-shaped spot, characterized in that: The invention comprises a primary shaping device and a secondary shaping device (1), wherein the primary shaping device is arranged vertically, and an optical fiber interface (2) is provided at its upper end and is used for connecting to a laser, and an outlet is provided at its lower end and is also provided with an opening that is also provided at one side of the primary shaping device. Laser light is injected from the optical fiber interface (2), and is reflected to the opening after being shaped once by the primary shaping device. The secondary shaping device (1) is fixedly mounted at the opening and is used for performing secondary shaping on the laser light after the primary shaping, and reflecting the laser light back to the primary shaping device. The laser light after the secondary shaping is reflected by the primary shaping device and then emitted from the outlet. It also includes a reflecting device and an optical adjustment device (5), wherein the top and bottom of the reflecting device are respectively provided with an inlet and an outlet penetrating from the inside and outside, and one side of the reflecting device is provided with a through hole penetrating from the inside and outside; the primary shaping device is fixedly mounted on the top of the reflecting device, and the outlet is connected to the inlet, and the laser light after secondary shaping is injected into the reflecting device from the inlet and reflected to the through hole by the reflecting device; the optical adjustment device (5) is fixedly mounted at the through hole and is used to adjust the secondary shaping laser light reflected by the reflecting device and send the adjusted laser light to the reflecting device, and the reflecting device reflects the adjusted laser light and emits it from the outlet; An annular achromatic device (6) is fixedly mounted at the emission port, the reflecting device comprises a shell (9), the inlet and the emission port are respectively located at the top and bottom of the shell (9), and the through hole is located at one side of the shell (9).

2. The grating diffraction system of special-shaped light spot according to claim 1, characterized in that: The preliminary shaping device comprises a housing (4), the optical fiber interface (2) and the outlet are respectively located at the upper end and the lower end of the housing (4), and the opening is located at one side of the housing (4).

3. The grating diffraction system of the special-shaped spot according to claim 2, characterized in that: The preliminary shaping device further comprises two optical combination lenses (3), the two optical combination lenses (3) being spaced apart from each other in the housing (4) and having one end fixedly connected to the housing (4) and the other end extending obliquely between the two and perpendicular to each other; the opening is located at the other end of the two optical combination lenses (3).

4. The shaped spot grating diffraction system according to claim 1, characterized in that: The reflecting device further comprises two reflecting lenses (8), the two reflecting lenses (8) being spaced apart vertically in the housing (9), one end of each reflecting lens being fixedly connected to the housing (9), and the other end of each reflecting lens extending obliquely between the two and being perpendicular to each other; the through hole is located at the other end of the two reflecting lenses (8).

5. The shaped spot grating diffraction system according to claim 1, characterized in that: The housing (9) is provided with at least one mounting hole (7) for connecting a mounting device.

6. The shaped spot grating diffraction system according to claim 1, characterized in that: A temperature detection component (10) for detecting the temperature of the laser is fixedly mounted on the optical adjustment device (5).

7. The grating diffraction system of special-shaped light spot according to claim 6, characterized in that: The temperature detection component (10) is a temperature sensor.

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