Galvanometer angle adjusting mechanism

Abstract

The utility model provides a galvanometer angle adjusting mechanism, and belongs to the technical field of laser welding. The problems that in the prior art, due to errors caused by external force in the manufacturing, assembling and using processes of parts, the installation angle of a galvanometer system in a laser welding gun also has errors, and control over the welding spot position of a laser beam is not accurate are solved. The utility model provides a galvanometer angle adjusting mechanism which comprises a motor base and a galvanometer motor installed on the motor base in a penetrating mode, the matching portion of the galvanometer motor and the motor base is provided with a circular section, and a galvanometer piece is installed on an output shaft of the galvanometer motor. The two ends of the motor base are a positioning end and a tightening end respectively, the positioning end is located at one end of an output shaft of the galvanometer motor, the tightening end is located at the tail end of the galvanometer motor, and the tightening force of the tightening end can be adjusted. In the on-site use process, when the angle and the position of the laser beam are inaccurate, a user can calibrate and adjust the initial angle of the vibrating lens on site.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, in particular to a galvanometer angle adjustment mechanism. Background Art

[0002] The laser welding galvanometer is a key component of the laser welding machine, mainly used to control the direction of the laser beam. The working principle of the laser welding galvanometer is based on the strong energy density and rapid motion properties of the laser. The laser beam is transmitted to the galvanometer system through an optical device. The system is equipped with a galvanometer that can reflect the laser beam. Driven by a high-speed motor, the galvanometer swings according to a specific pattern to achieve rapid scanning of the laser beam, which can be simply understood as reflecting the laser beam at different angles.

[0003] The computer controls the swing rate and angle of the galvanometer, thereby accurately controlling the position and trajectory of the laser beam on the workpiece. The focused laser beam irradiates the surface of the workpiece, and the laser energy is absorbed by the material and converted into heat energy, causing the material to partially melt and form a molten pool. As the laser beam moves, the molten pool also moves and eventually cools and solidifies to form a weld.

[0004] To ensure the accuracy of the position and movement trajectory of the laser beam on the workpiece surface, the accuracy of the initial position of the galvanometer must be ensured, so that under the control of the computer, the reflection direction of the laser beam will be accurate and finally irradiate a specific position on the workpiece surface. However, in the prior art, due to errors caused during the manufacturing, assembly and use of parts, the installation angle of the galvanometer system in the laser welding gun will also have errors, resulting in a difference between the actual installation angle and the design angle of the galvanometer, and the welding point position control of the laser beam is not accurate during use. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a galvanometer angle adjustment mechanism for solving the problem in the prior art that the installation angle of the galvanometer system in the laser welding gun is incorrect and the welding point position control of the laser beam is not accurate.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a galvanometer angle adjustment mechanism, including a motor seat and a galvanometer motor installed through the motor seat, the matching part of the galvanometer motor and the motor seat is a circular cross-section, and the galvanometer lens is installed on the output shaft of the galvanometer motor;

[0007] The two ends of the motor seat are respectively a positioning end and a tightening end, the positioning end is located at one end of the galvanometer motor output shaft, the tightening end is located at the tail end of the galvanometer motor, and the tightening force of the tightening end can be adjusted.

[0008] Optionally, the tightening end comprises two arc-shaped tightening pieces arranged opposite to each other, and the degree of tension of the two arc-shaped tightening pieces is adjusted by a tightening bolt.

[0009] Optionally, a circumferential positioning plate is provided on the outer circumference of the tail end of the galvanometer motor, and the cross-section of the positioning plate exceeds the galvanometer motor mounting hole on the motor base.

[0010] Optionally, the positioning plate is a circuit board, and the circuit of the circuit board is connected to the motor circuit.

[0011] Optionally, four adjusting wire holes are arranged on the positioning end around the galvanometer motor mounting hole, each of the adjusting wire holes passes through the positioning end, and the four adjusting wire holes are distributed in a rectangular shape.

[0012] Optionally, a round head screw is provided in the adjusting thread hole, the head end of the round head screw faces one end of the output shaft of the galvanometer motor and the head end of the round head screw is circular, and the tail end of the round head screw is a concave tightening structure.

[0013] Optionally, an end surface of the positioning end facing one end of the galvanometer motor output shaft is a positioning surface, a rubber ring is provided on the positioning surface, and the rubber ring is in contact with the positioning surface and the galvanometer motor housing at the same time.

[0014] Optionally, at least two symmetrical locking holes are arranged on the positioning end around the galvanometer motor mounting hole, and each of the locking holes passes through the positioning end.

[0015] Optionally, there are four locking holes, which are respectively arranged at four corners of the positioning end, and a sinking area is arranged at the corresponding position of the positioning end.

[0016] Optionally, the mounting screw is inserted from the locking hole and screwed into the threaded hole of the butt end, and an elastic reaction force piece is provided between the contact surfaces of the positioning end and the butt end.

[0017] As described above, the galvanometer angle adjustment mechanism of the utility model has at least the following beneficial effects:

[0018] During the use of the laser welding gun, the angle of the galvanometer can be adjusted at any time, and the angle of the galvanometer can be calibrated and adjusted according to the usage to ensure that the reflection direction of the laser beam is accurate and the position of irradiation on the surface of the workpiece is accurate. The galvanometer lens is installed on the output shaft of the galvanometer motor, and the galvanometer motor is installed on the motor seat. The matching part of the galvanometer motor and the motor seat is a circular cross-section. There is a clamping end on the motor seat, and the clamping force of the clamping end can be adjusted. When it is necessary to adjust the initial angle of the galvanometer motor, adjust the clamping force of the clamping end, and the galvanometer motor can be rotated around the axis on the motor seat to adjust the angle, that is, adjust the initial angle of the galvanometer lens. When the angle is accurate, tighten the clamp and fix the galvanometer motor on the motor seat. This structure allows the user to calibrate the initial angle of the galvanometer lens on site. During use, when the angle and position of the laser beam are inaccurate due to welding gun collision, etc., it can also be adjusted and calibrated by itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of the positioning end of the utility model.

[0020] Figure 2 Shown is a schematic diagram of the tightening hoop end of the utility model.

[0021] Figure 3 Shown is a schematic diagram of the arrangement of the round head screws of the utility model.

[0022] Figure 4 Shown is a schematic diagram of an application scenario of the adjustment mechanism of the utility model.

[0023] Figure 5 Shown is a schematic diagram of the installation of the adjustment mechanism of the utility model on a welding gun.

[0024] Figure 6 Shown is a schematic diagram of the installation of the elastic reaction member of the utility model.

[0025] Figure 7 Shown is a schematic diagram of the optical path of the galvanometer lens of the utility model.

[0026] Among them: motor seat 70, positioning end 701, adjusting thread hole 7011, round head screw 7012, positioning surface 7013, tightening end 702, arc tightening piece 7021, tightening bolt 7022, rubber ring 703, galvanometer motor 71, positioning plate 710, galvanometer piece 72, elastic reaction piece 73. DETAILED DESCRIPTION

[0027] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] See also Figures 1 to 7. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0029] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0030] For this example, please refer to Figure 1-5 The embodiment of the galvanometer angle adjustment mechanism provided by the utility model comprises a motor base 70 and a galvanometer motor 71 which is installed through the motor base 70. The matching part of the galvanometer motor 71 and the motor base 70 is a circular cross-section. The galvanometer motor 71 can rotate in the matching part of the motor base 70. The galvanometer lens 72 is installed on the output shaft of the galvanometer motor 71.

[0031] The two ends of the motor base 70 are respectively a positioning end 701 and a tightening end 702 . The positioning end 701 is located at one end of the output shaft of the galvanometer motor 71 , and the tightening end 702 is located at the tail end of the galvanometer motor 71 . The tightening force of the tightening end 702 can be adjusted.

[0032] The above embodiments can be used in the following scenarios: Figure 4 , Figure 5 and Figure 7 , the oscillator angle adjustment mechanism is installed in the handheld laser welding gun, Figure 7 The figure shows the optical path of the welding gun. The laser is injected from the handle end of the welding gun through the optical fiber bundle, and is reflected to the gun nozzle by the galvanometer. The position of the light spot at the gun nozzle can be adjusted by adjusting the angle of the galvanometer. In the specific implementation, the initial angle of the galvanometer must be accurate. During the welding process, the computer controls the reciprocating swing of the galvanometer motor shaft to adjust the galvanometer deflection angle, thereby adjusting the reflection path of the laser beam.

[0033] However, in the prior art, due to the errors in the manufacturing and assembly of parts, the installation angle of the galvanometer system in the laser welding gun will deviate, resulting in a difference between the actual installation angle of the galvanometer and the designed angle. When in use, the computer controls the reciprocating swing of the galvanometer motor shaft to adjust the welding point position of the laser beam, and the control is not accurate. During use, when this happens, the galvanometer needs to be calibrated and adjusted, such as Figure 7 As shown, initially, the galvanometer should be in a horizontal state.

[0034] In the above embodiment, by loosening the clamping force of the clamping end 702 on the motor base 70, the galvanometer motor 71 can rotate in the matching part of the motor base 70, and after ensuring that the galvanometer is in a horizontal state, the clamping force of the clamping end 702 on the motor base 70 is strengthened, thereby fixing the angle between the galvanometer motor 71 and the galvanometer. In general, the operation is simple and can be adjusted and calibrated on site, without the need to configure and modify the computer program and parameters for controlling the galvanometer motor.

[0035] Furthermore, if Figure 2 As shown, the clamping end 702 includes two arc-shaped clamping pieces 7021 arranged opposite to each other, and the tension of the two arc-shaped clamping pieces 7021 is adjusted by a clamping bolt 7022. The two arc-shaped clamping pieces 7021 are arranged opposite to each other to form an arc-shaped embracing arc with a notch. The notch is provided with a screw hole. The two arc-shaped clamping pieces 7021 can be tightened by screwing in the screws, thereby reducing the cross-sectional size of the inner arc surface of the two arc-shaped clamping pieces 7021. The two arc-shaped clamping pieces 7021 with the notch are not integrated with the positioning end 701. Figure 2 There is a gap between the disconnected part of the notch of the two arc-shaped tightening pieces 7021 and the positioning end 701, so that the cross-sectional size of the inner arc surface of the two arc-shaped tightening pieces 7021 can be adjusted by tightening the two arc-shaped tightening pieces 7021 with screws, that is, the size of the tightening force can be adjusted. The circumferential range of the arc-shaped tightening pieces 7021 and the positioning end 701 can be set to about 90 degrees. Generally speaking, half of the two opposite arc-shaped tightening pieces 7021 are fixedly connected to the positioning end 701, and the other half of the circle has a gap with the positioning end 701. In the middle of the half circle with the gap, a disconnected gap is formed between the two arc-shaped tightening pieces 7021 and the relative distance is adjusted by screws.

[0036] Through the above structure, the clamping force of the clamping end 702 can be adjusted relatively easily, thereby loosening the locking of the galvanometer motor, thereby facilitating the adjustment of the initial angle of the galvanometer lens.

[0037] This embodiment can be found in Figure 3A circumferential positioning plate 710 is provided on the outer circumference of the tail end of the galvanometer motor 71, and the cross section of the positioning plate 710 exceeds the mounting hole of the galvanometer motor 71 on the motor base 70. The positioning plate 710 is used to locate the axial mounting position of the galvanometer motor 71. The accurate mounting position is the position where the positioning plate 710 just contacts the end surface of the clamp end 702. At this time, the axial mounting position of the galvanometer motor 71 and the galvanometer is accurate.

[0038] Furthermore, the positioning plate 710 is a circuit board, and the circuit of the circuit board is connected to the motor circuit. The rotation of the galvanometer motor is relatively complex, not a simple one-way rotation, and a circuit board for controlling the signal needs to be configured. In order to avoid uneven contact between the circuit board and the end surface of the clamp end 702, part of the material of the end surface of the clamp end 702 can be removed to form a local depression, such as Figure 3 As shown, it should not exceed the cross section of the circuit board to ensure that the end surface of the clamp end 702 can limit and position the positioning plate 710 (circuit board) to ensure the accurate axial installation position of the galvanometer motor 71 and the galvanometer.

[0039] In this embodiment, Figure 3 As shown, four adjusting thread holes 7011 are arranged on the positioning end 701 around the mounting hole of the galvanometer motor 71, and each adjusting thread hole 7011 penetrates the positioning end 701, and the four adjusting thread holes 7011 are distributed in a rectangular shape. A round head screw 7012 is arranged in the adjusting thread hole 7011, and the head end of the round head screw 7012 faces one end of the output shaft of the galvanometer motor 71 and the head end of the round head screw 7012 is round, and the tail end of the round head screw 7012 is a concave tightening structure, such as a hexagonal, inner rectangular, cross, flat, etc. structure that matches a screwdriver, which can prevent it from being screwed by mistake, resulting in calibration failure.

[0040] The effects achieved by the above embodiments are as follows: Figure 3 Taking the state shown in the figure as an example, by controlling the length difference between the two round head screws 7012 on the upper side and the two round head screws 7012 on the lower side beyond the end surface of the positioning end 701, the installation angle of the galvanometer motor can be controlled. Figure 5 When the welding gun is installed as shown, since the round head screw 7012 protrudes from the end face of the positioning end 701, the positioning end 701 will have a relative tilt angle with the mounting end of the welding gun, thereby adjusting the initial pitch angle of the galvanometer lens. In fact, by adjusting the length of each round head screw 7012 that exceeds the end face of the positioning end 701, the installation angle of the motor seat can be fine-tuned and controlled. It should be noted that at one end of the welding gun, the mounting hole should be appropriately larger than the galvanometer lens and the galvanometer motor to ensure that when the angle is adjusted, the axis of the galvanometer motor can be tilted relative to the axis of the mounting hole on the welding gun. After the length of each round head screw 7012 that exceeds the end face of the positioning end 701 is adjusted appropriately, the galvanometer angle adjustment mechanism can be fixed to the welding gun as a whole by other means.

[0041] Further, this embodiment can refer to Figure 1 The end surface of the positioning end 701 facing the output shaft of the galvanometer motor 71 is the positioning surface 7013. A rubber ring 703 is provided on the positioning surface 7013. The rubber ring 703 is in contact with the positioning surface 7013 and the housing of the galvanometer motor 71 at the same time. The positioning surface 7013 is also the mounting surface of the welding gun body. The rubber ring 703 can play the role of sealing the connection interface. In particular, due to the ejection effect of the round head screw 7012, there will be a small gap between the positioning end 701 and the mounting end on the welding gun. On one set of opposite sides of the positioning surface 7013, there are positioning protrusions perpendicular to the top surface, which can be seen in FIG. Figure 1 , two positioning protrusions are set opposite to each other, combined with Figure 5 During installation, the two positioning protrusions just clamp the target installation structure, playing the role of positioning and limiting.

[0042] In this embodiment, Figure 1-3 As shown, at least two symmetrical locking holes are provided on the positioning end 701 around the mounting hole of the galvanometer motor 71, and each locking hole passes through the positioning end 701. Preferably, there are four locking holes, which are respectively provided at the four corners of the positioning end 701, and a sinking area is provided at the corresponding position of the positioning end 701 to allow the head end of the screw to sink. Before adjusting the round head screw 7012, it is necessary to loosen the mounting screws around it first. After the mounting angle of the galvanometer motor is accurate by adjusting the four round head screws 7012, the mounting screws are used to fix the galvanometer angle adjustment mechanism to the welding gun body through the locking hole, so that the accurate angle of the galvanometer lens can be fixed.

[0043] Furthermore, if Figure 6 As shown, the mounting screw is inserted from the locking hole and screwed into the threaded hole of the butt end. An elastic reaction piece 73 is arranged between the contact surface of the positioning end 701 and the butt end. Specifically, the butt end is a countersunk hole, and a spring is arranged within the countersunk range. When the mounting screw tightens the positioning end 701 and the butt end, the spring is compressed to form a reaction force between the positioning end 701 and the butt end, and the rigid connection between the positioning end 701 and the butt end is converted into an elastic connection with a pre-tightening force, which has an anti-loosening effect, and the accurate adjustment of the galvanometer angle is not easy to change due to collision during use. The cross-sectional size of the four locking holes needs to be larger than the cross-sectional size of the matching mounting screws, so that the mounting screws can be tilted in the locking holes. When the round head screw 7012 protrudes from the end face of the positioning end 701, an inclined angle is formed between the positioning end 701 and the target mounting surface, and the mounting screws in the four locking holes will also be tilted. Only when the locking hole is large enough, the mounting screws can be installed normally. The matching mounting screws can use elastic washers so that the nuts of the mounting screws can be pressed more tightly on the surface of the force-bearing structure.

[0044] In summary, the utility model effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. The galvanometer angle adjustment mechanism is characterized by: It comprises a motor seat (70) and a galvanometer motor (71) installed through the motor seat (70), wherein the mating portion between the galvanometer motor (71) and the motor seat (70) is a circular cross-section, and a galvanometer lens (72) is installed on the output shaft of the galvanometer motor (71); The two ends of the motor seat (70) are respectively a positioning end (701) and a tightening end (702); the positioning end (701) is located at one end of the output shaft of the galvanometer motor (71); the tightening end (702) is located at the tail end of the galvanometer motor (71); and the tightening force of the tightening end (702) is adjustable.

2. The galvanometer angle adjustment mechanism according to claim 1, characterized in that: The tightening end (702) comprises two arc-shaped tightening pieces (7021) arranged opposite to each other, and the degree of tension of the two arc-shaped tightening pieces (7021) is adjusted by means of a tightening bolt (7022).

3. The galvanometer angle adjustment mechanism according to claim 1, characterized in that: A circumferential positioning plate (710) is provided on the outer circumference of the tail end of the galvanometer motor (71), and the cross section of the positioning plate (710) exceeds the mounting hole of the galvanometer motor (71) on the motor seat (70).

4. The galvanometer angle adjustment mechanism according to claim 3, characterized in that: The positioning plate (710) is a circuit board, and the circuits of the circuit board are connected to the motor circuits.

5. The galvanometer angle adjustment mechanism according to claim 1, characterized in that: Four adjusting thread holes (7011) are arranged on the positioning end (701) around the mounting hole of the galvanometer motor (71), each of the adjusting thread holes (7011) passes through the positioning end (701), and the four adjusting thread holes (7011) are distributed in a rectangular shape.

6. The galvanometer angle adjustment mechanism according to claim 5, characterized in that: A round head screw (7012) is arranged in the adjusting thread hole (7011), the head end of the round head screw (7012) faces one end of the output shaft of the galvanometer motor (71) and the head end of the round head screw (7012) is circular, and the tail end of the round head screw (7012) is a concave tightening structure.

7. The galvanometer angle adjustment mechanism according to claim 1, characterized in that: The end surface of the positioning end (701) facing one end of the output shaft of the galvanometer motor (71) is a positioning surface (7013), a rubber ring (703) is provided on the positioning surface (7013), and the rubber ring (703) is in contact with the positioning surface (7013) and the housing of the galvanometer motor (71) at the same time.

8. The galvanometer angle adjustment mechanism according to claim 1, characterized in that: At least two symmetrical locking holes are arranged on the positioning end (701) around the mounting hole of the galvanometer motor (71), and each of the locking holes passes through the positioning end (701).

9. The galvanometer angle adjustment mechanism according to claim 8, characterized in that: There are four locking holes, which are respectively arranged at four corners of the positioning end (701), and a sinking area is arranged at the corresponding position of the positioning end (701).

10. The galvanometer angle adjustment mechanism according to claim 9, characterized in that: The mounting screw is inserted from the locking hole and screwed into the threaded hole of the butt end, and an elastic reaction piece (73) is provided between the contact surface of the positioning end (701) and the butt end.

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