Galvanometer motor and handheld laser welding gun

Abstract

An embodiment of the utility model discloses a galvanometer motor and a handheld laser welding gun, the galvanometer motor comprises a metal mirror, a swing rod and a driving motor, the driving motor comprises a motor body and an output shaft connected with the motor body, and the metal mirror, the swing rod and the output shaft are a structural member integrally formed. And stable and reliable connection can be ensured in a high-vibration environment, the service life of the metal mirror is relatively long, and the use cost is relatively low. The galvanometer motor is applied to the handheld laser welding gun, and the service life of the metal mirror is long, so that the service life of the galvanometer motor is long, and the use cost of the handheld laser welding gun is reduced.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a galvanometer motor and a handheld laser welding gun. Background Technology

[0002] In the field of laser processing, a galvanometer motor is a special type of oscillating motor. By controlling the rotation angle of its output shaft, the oscillation angle of the mirror connected to it can be controlled, thereby achieving the constraint and manipulation of the laser beam. Typically, the output shaft of the galvanometer motor and the mirror are connected and fixed by an adapter structure. However, this adapter structure is prone to loosening in high-vibration environments, leading to mirror breakage and resulting in high operating costs. Utility Model Content

[0003] The purpose of this invention is to propose a galvanometer motor and a handheld laser welding gun, which aims to solve the problem that the output shaft of the existing galvanometer motor and the lens are connected and fixed by an adapter structure, but the adapter structure is prone to loosening in high vibration environments, resulting in lens breakage and high usage costs.

[0004] In a first aspect, the present invention provides a galvanometer motor, the galvanometer motor comprising a metal mirror, a pendulum rod and a drive motor, the drive motor comprising a motor body and an output shaft connected to the motor body, the metal mirror, the pendulum rod and the output shaft being integrally formed structural components.

[0005] In one embodiment, the metal mirror includes a reflective surface and a cooling surface disposed opposite to each other, the reflective surface being coated with a metal film layer formed of a metal material.

[0006] In one embodiment, the reflective surface is coated with a film layer formed of aluminum, gold, or silver; and / or,

[0007] The metal mirror is made of copper or stainless steel.

[0008] In one embodiment, the metal mirror includes a reflective surface and a cooling surface disposed opposite to each other, and the galvanometer motor further includes a semiconductor cooling chip, which is attached to the cooling surface and used to reduce the temperature of the metal mirror.

[0009] In one embodiment, the galvanometer motor further includes a wire for electrical connection with the semiconductor cooling chip, and the swing arm has a groove for accommodating the wire.

[0010] In one embodiment, the thickness of the metal mirror is 0.8mm-1.2mm, and the flatness of the metal mirror is not higher than 100nm; and / or,

[0011] The surface of the metal mirror is arc-shaped, and the shape of the metal mirror can be prismatic, circular, elliptical, or rectangular.

[0012] In one embodiment, the plane containing the metal mirror is positioned at an angle of 0° to 90° to the output shaft; and / or,

[0013] The motor body is capable of driving the output shaft to vibrate at a frequency of not less than 20,000 Hz.

[0014] Secondly, this utility model also provides a handheld laser welding gun, which includes the galvanometer motor of any of the above embodiments.

[0015] In one embodiment, the handheld laser welding gun is provided with an optical path channel extending in a first direction, a gun barrel extending in a second direction, and a mounting cavity connecting the optical path channel and the gun barrel.

[0016] The handheld laser welding gun also includes several connectors. A connecting plate is provided on the outer wall of the motor body. The connecting plate is provided with several connecting holes. The several connecting holes are distributed circumferentially at intervals on the connecting plate. The several connectors are correspondingly inserted through the several connecting holes and are detachably connected to the cavity wall of the mounting cavity so as to install the galvanometer motor in the mounting cavity.

[0017] In one embodiment, the connecting plate is provided with a sealing groove, and the sealing ring is accommodated in the groove wall of the sealing groove and elastically abuts against the cavity wall of the mounting cavity.

[0018] The present invention has the following beneficial effects:

[0019] The galvanometer motor of this invention, because the metal mirror, the swing arm and the output shaft are integrally formed structural components, can ensure stable and reliable connection even in high vibration environments, has a long service life for the metal mirror and a low operating cost for the galvanometer motor.

[0020] Applying the aforementioned galvanometer motor to a handheld laser welding gun can extend the lifespan of the galvanometer motor due to the long service life of the metal mirror, thereby reducing the operating cost of the handheld laser welding gun. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] in:

[0023] Figure 1 This is a schematic diagram of the galvanometer motor in a handheld laser welding gun in one embodiment.

[0024] Figure 2 for Figure 1 The diagram shows another angle of the galvanometer motor.

[0025] Figure 3 for Figure 1 The front view of the galvanometer motor is shown.

[0026] Reference numerals: 100, metal mirror; 110, reflective surface; 120, cooling surface; 130, metal film layer;

[0027] 200. Swing rod; 210. Cable tray;

[0028] 300. Drive motor; 310. Motor body; 311. Connecting plate; 312. Connecting hole; 313. Sealing groove; 320. Output shaft;

[0029] 400. Semiconductor cooling chip; 410. Wire. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] This utility model discloses a handheld laser welding gun capable of performing laser welding on workpieces. One embodiment of the handheld laser welding gun includes a galvanometer motor. The galvanometer motor is used to adjust the transmission direction of the laser beam, thereby performing laser processing on the workpiece using the laser beam.

[0034] In one embodiment, please refer to Figures 1 to 3 The galvanometer motor includes a metal mirror 100, a swing arm 200, and a drive motor 300. The drive motor 300 includes a motor body 310 and an output shaft 320 connected to the motor body 310. The metal mirror 100, the swing arm 200, and the output shaft 320 are integrally formed structural components, which can ensure stable and reliable connection even in high vibration environments. The metal mirror 100 has a long service life, which can extend the service life of the galvanometer motor and reduce the cost of using the handheld laser welding gun.

[0035] It is understandable that, compared with the existing complex adapter structure and assembly process, the galvanometer motor of this embodiment improves the stability and reliability of the connection between the drive motor 300 and the metal mirror 100 by connecting the metal mirror 100, the swing arm 200 and the output shaft 320 as a whole, and reduces the possibility of the connection structure between the metal mirror 100 and the drive motor 300 breaking.

[0036] In one embodiment, please refer to Figures 1 to 3 The metal mirror 100 includes a reflective surface 110 and a cooling surface 120 arranged opposite to each other. A metal film layer 130 formed of a metallic material is deposited on the reflective surface 110. The metal film layer 130 ensures that the reflective surface 110 has a high reflectivity, specifically 99.9% or greater, thereby reducing energy loss and heat generation to ensure that the output energy meets the requirements of laser processing such as laser welding. Specifically, the reflective surface 110 is deposited with a film layer formed of aluminum, gold, or silver. Compared to a film layer formed of silver, a film layer formed of gold has better reflectivity, and compared to films formed of gold or silver, a film layer formed of aluminum has higher durability.

[0037] Furthermore, in this embodiment, the metal mirror 100 is a mirror body made of copper or stainless steel. It is understood that, compared to existing glass or crystalline lenses, the metal mirror 100 of this embodiment has better structural strength, better surface flatness, and lower manufacturing costs.

[0038] Meanwhile, when using existing glass mirror technology, the film layer on its reflective surface 110 is usually a dielectric film, that is, a non-metallic compound film layer. The coating process for this film layer is both thick and costly. The high thickness of this film layer can easily lead to the formation of pits in some areas of the reflective surface 110. These pits absorb heat, thereby causing the temperature of the glass mirror to rise, affecting the reflectivity of the glass mirror, and making it not resistant to high temperatures.

[0039] In this embodiment, the metal mirror 100 has a metal film layer 130. While maintaining its reflectivity, the metal film layer 130 is thinner than the dielectric film layer. The metal film layer 130 has fewer coating impurities, higher quality, and lower cost. It absorbs less heat, resulting in more stable optical performance at high temperatures. It can withstand higher power lasers, has higher reliability, and improves the overall performance of the handheld laser welding gun.

[0040] In one embodiment, please refer to Figures 1 to 3 The metal mirror 100 includes a reflective surface 110 and a cooling surface 120 disposed opposite to each other. The galvanometer motor also includes a thermoelectric cooler 400, which is attached to the cooling surface 120 and used to reduce the temperature of the metal mirror 100. The thermoelectric cooler 400 can accelerate the heat dissipation of the metal mirror 100.

[0041] Understandably, if the temperature of the metal mirror 100 is too high, it will affect the reflectivity of the reflective film on it. By cooling the metal mirror 100, it can withstand higher laser power and at the same time, the reflective film on it can be kept at a high reflectivity, thereby reducing energy loss and heat generation, so as to ensure that the output energy meets the requirements of laser processing such as laser welding.

[0042] In this embodiment, the galvanometer motor also includes a wire 410 for electrical connection with the thermoelectric cooler 400. The wire 410 can supply power to the thermoelectric cooler 400 and transmit control signals. A groove 210 is provided on the swing arm 200 to accommodate the wire 410. The wire 410 runs through the groove 210, which can ensure the stability and reliability of the wire 410. The groove 210 can reduce the weight of the swing arm 200, thereby reducing the swing inertia of the swing arm 200, reducing the load on the motor body 310, and increasing the service life of the galvanometer motor.

[0043] Specifically, the thermoelectric cooler 400 is smaller than the metal mirror 100, but it needs to be able to cover the light spot irradiation area of ​​the reflective surface 110. The larger the size of the thermoelectric cooler 400, the better its heat dissipation effect. The thermoelectric cooler 400 is bonded to the cooling surface 120 of the metal mirror 100.

[0044] In one embodiment, please refer to Figures 1 to 3The thickness of the metal mirror 100 is 0.8mm-1.2mm. The thinner the metal mirror 100 is, the better, while ensuring its strength, to reduce weight. Specifically, the thickness of the metal mirror 100 can be selected as 0.8mm, 0.9mm, 1.0mm, 1.1mm or 1.2mm.

[0045] In one embodiment, the flatness of the metal mirror 100 is no higher than 100 nm, and the mirror surface of the metal mirror 100 is arc-shaped, thereby ensuring the reflectivity of its reflecting surface 110.

[0046] Specifically, the shape of the metal mirror 100 is prismatic, circular, elliptical, or rectangular, so that the reflecting surface 110 of the metal mirror 100 can effectively accommodate all the light spots of the laser beam.

[0047] In one embodiment, please refer to Figures 1 to 3 The plane where the metal mirror 100 is located is set at an angle of 0°-90° to the output shaft 320, so that the installation angle of the galvanometer motor can be designed according to the handheld laser welding gun, which facilitates the flexible distribution of the galvanometer motor on the handheld laser welding gun and is conducive to the miniaturization design of the handheld laser welding gun.

[0048] Specifically, when the plane where the metal mirror 100 is located is set at a 0° angle to the output shaft 320, the output shaft 320 is located on the plane where the metal mirror 100 is located. In addition, the plane where the metal mirror 100 is located can also be set at an acute angle to the output shaft 320 or perpendicular to it.

[0049] In one embodiment, please refer to Figures 1 to 3 The motor body 310 can drive the output shaft 320 to vibrate at a frequency of not less than 20,000 Hz, thereby achieving ultrasonic dust removal.

[0050] Understandably, the vibration frequency of the motor body 310 driving the metal mirror 100 is typically between 200Hz and 650Hz. Within this frequency range, the metal mirror 100 can be driven to perform its conventional galvanometer function, changing the circular light spot into a straight light spot, reducing the assembly gap requirements of the welded parts during the welding process, so as to achieve a larger weld pool and better weld strength.

[0051] Since the motor body 310 in this embodiment is equipped with an ultrasonic dust removal function that vibrates at a frequency of not less than 20,000 Hz, in addition to its original functions, when the handheld laser welding gun needs maintenance, the ultrasonic dust removal function can remove dust from the metal mirror 100 in just a few minutes, thus ensuring a high reflectivity of the metal mirror 100. Specifically, the drive motor 300 can be selected as a resonant ultrasonic motor, a vibration motor, a wave-type ultrasonic motor, or a piezoelectric ceramic drive motor, etc. Under normal working conditions, the drive motor can drive the galvanometer to swing and adjust the optical path. When maintenance is required, the ultrasonic dust removal function can be achieved by switching the operating frequency of the drive motor 300 through the controller.

[0052] In one embodiment, the handheld laser welding gun has an optical path channel extending in a first direction, a gun barrel extending in a second direction, and a mounting cavity connecting the optical path channel and the gun barrel.

[0053] Please refer to Figures 1 to 3 The handheld laser welding gun also includes several connectors. A connecting plate 311 is provided on the outer wall of the motor body 310. The connecting plate 311 has several connecting holes 312, which are circumferentially spaced. Several connectors are inserted one-to-one into the connecting holes 312 and are detachably connected to the cavity wall of the mounting cavity to install the galvanometer motor inside the mounting cavity. Through the galvanometer motor, the laser beam from the optical path channel can be reflected by the galvanometer motor and transported along the central axis of the gun barrel.

[0054] Specifically, the connecting hole 312 can be a threaded hole, which can ensure the installation accuracy of the motor body 310, such as the coaxiality of the motor body 310 and the mounting hole position in the mounting cavity. Furthermore, a number of connecting holes 312 are evenly distributed around the flange, and the number of connecting holes 312 can be 2, 3, 4 or other quantities.

[0055] In one embodiment, please refer to Figures 1 to 3 The connecting plate 311 is provided with a sealing groove 313, and the sealing ring is housed in the groove wall of the sealing groove 313 and elastically abuts against the cavity wall of the mounting cavity. The sealing ring serves two purposes: firstly, it prevents external dust from entering the mounting cavity, thus keeping the metal mirror 100 clean; secondly, by elastically abutting the motor body 310 against the groove wall of the mounting groove, it reduces the problem of vibration of the motor body 310 during handheld laser welding gun use, or loosening of the connection between the motor and the gun body during motor vibration, especially ultrasonic vibration.

[0056] Specifically, the sealing ring is an elastic structure made of fluororubber, which gives it good high-temperature performance. The width and depth of the sealing groove 313 can be adjusted as needed.

[0057] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A galvanometer motor characterized by comprising: The galvanometer motor comprises a metal mirror, a swing rod and a driving motor, the driving motor comprises a motor body and an output shaft connected with the motor body, and the metal mirror, the swing rod and the output shaft are integrally formed.

2. The galvanometer motor according to claim 1, characterized by The metal mirror comprises oppositely arranged reflecting surfaces and cooling surfaces, and the reflecting surfaces are coated with a metal film layer formed by a metal material.

3. The galvanometer motor according to claim 2, characterized by The reflecting surfaces are coated with a film layer formed by aluminum, gold or silver material; and / or, The metal mirror is a mirror body made of copper metal or stainless steel material.

4. The galvanometer motor according to claim 1, characterized by, The metal mirror comprises oppositely arranged reflecting surfaces and cooling surfaces, and the galvanometer motor further comprises a semiconductor refrigeration sheet, the semiconductor refrigeration sheet is attached to the cooling surface and used for reducing the temperature of the metal mirror.

5. The galvanometer motor according to claim 4, characterized by The galvanometer motor further comprises a wire for electrically connecting with the semiconductor refrigeration sheet, and the swing rod is provided with a wire slot for accommodating the wire.

6. The galvanometer motor according to claim 1, characterized by The thickness of the metal mirror is 0.8-1.2 mm, and the flatness of the metal mirror is not higher than 100 nm; and / or, The mirror surface of the metal mirror is in a circular arc shape, and the shape of the metal mirror is prismatic, circular, elliptical or rectangular.

7. The galvanometer motor according to claim 1, characterized by The plane where the metal mirror is located is arranged at an angle of 0-90° with the output shaft; and / or, The motor body can drive the output shaft to vibrate at a frequency of not less than 20000 Hz.

8. A hand-held laser welding gun characterized by, The handheld laser welding gun comprises the galvanometer motor according to any one of claims 1-7.

9. The handheld laser welding gun of claim 8, wherein, The handheld laser welding gun is provided with a light path channel extending in a first direction, a gun barrel extending in a second direction and a mounting cavity communicating the light path channel and the gun barrel; The handheld laser welding gun further comprises a plurality of connecting members, the outer wall of the motor body is provided with a connecting disc, the connecting disc is provided with a plurality of connecting holes, the plurality of connecting holes are distributed at a circumferential direction of the connecting disc, the plurality of connecting members are respectively arranged in the plurality of connecting holes and detachably connected with the cavity wall of the mounting cavity, so that the galvanometer motor is mounted in the mounting cavity.

10. The handheld laser welding gun of claim 9, wherein, The connecting disc is provided with a sealing groove, a sealing ring is accommodated in the groove wall of the sealing groove and elastically abuts against the cavity wall of the mounting cavity.

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