A rapid alignment and adjustment device and method for a Dowell prism rotary cutting system

Abstract

This invention discloses a rapid alignment and adjustment device and method for a Dowell prism rotary cutting system. The device includes a dual-mirror modulation unit, a Dowell prism rotation unit, a CCD viewing unit, and a focusing unit sequentially arranged on the incident laser beam path, as well as controllers connected to each unit. The dual-mirror modulation unit includes X1, X2, Y1, and Y2 mirrors, which respectively adjust the position translation and angle deflection of the laser beam in the X and Y directions. The Dowell prism rotation unit adjusts the static laser beam into a dynamic outgoing beam. The CCD viewing unit observes the processing plane of the workpiece to be processed and acquires the beam trajectory. The focusing unit focuses the incoming laser beam onto the workpiece for processing. The controller controls the angle of the mirrors in the dual-mirror modulation unit according to the beam trajectory. This achieves automatic calibration of the incident beam from the Dowell prism.

Description

Technical Field

[0001] This invention belongs to the field of laser processing technology, and more specifically, relates to a rapid alignment and adjustment device and method for a Dowell prism rotary cutting system. Background Technology

[0002] Micro-holes have wide applications in various industrial fields, such as film cooling holes in turbine engines in the aerospace industry and fuel injector holes in automobile engines. Among the current processing methods, laser rotary cutting has gradually become the mainstream of circular micro-hole processing due to its high processing efficiency, good repeatability and good processing quality. The rotary cutting device based on the Daowei prism is the development direction of circular hole processing. However, the Daowei prism has harsh operating conditions. The rotary cutting system based on the Daowei prism has strict calibration requirements for the position and direction of the incident laser beam in front of the Daowei prism rotating device. Otherwise, it cannot be used normally for micro-circular hole processing.

[0003] Typically, a set of galvanometers is used to control the incident laser beam. The distance between the focused laser spot and the mechanical axis is converted into the angle required by the two galvanometers. The two galvanometers are then adjusted accordingly to precisely control the laser beam to be focused at a preset position for drilling. The two galvanometers compensate for each other, with the second galvanometer unit compensating for the angle of the laser beam caused by the first galvanometer unit.

[0004] However, the rotary cutting system with the Daowei prism combination of dual galvanometer units has the problem that it cannot automatically compensate for angular deflection error and position translation error. The dual galvanometers can only adjust the position and angle of the beam in one plane, but cannot adjust the position and angle error in three dimensions. When the laser beam incident into the system does not coincide with the mechanical axis, the hole diameter will be incorrect and the taper cannot be controlled. Summary of the Invention

[0005] To address the shortcomings of related technologies, the present invention aims to provide a rapid alignment and adjustment device and method for a Daowei prism rotary cutting system. This device uses a dual-mirror modulation unit to adjust the beam position and direction data, thereby achieving automatic calibration of the incident beam from the Daowei prism. The goal is to solve the problem that rotary cutting systems with dual-mirror units cannot automatically compensate for angular deflection and positional translation errors, resulting in incorrect hole diameters and uncontrollable taper during small hole processing.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a rapid alignment and adjustment device for a Dowell prism rotary cutting system, comprising a dual-mirror modulation unit, a Dowell prism rotation unit, a CCD visualization unit and a focusing unit arranged sequentially on the incident laser beam path, and a controller connected to each unit respectively.

[0007] The dual-mirror modulation unit includes a set of X1 and X2 mirrors for controlling beam adjustment in the X direction, and a set of Y1 and Y2 mirrors for controlling beam adjustment in the Y direction. These mirrors are used to adjust the position translation and angle deflection of the laser beam in the X and Y directions, respectively, so that the laser beam coincides with the mechanical axis of the Daowei prism rotation unit.

[0008] The Daowei prism rotation unit is used to adjust the static laser beam that has passed through the dual-mirror modulation unit into a dynamic outgoing beam that moves in a circular trajectory.

[0009] The CCD viewing unit includes a CCD camera and a semi-transparent mirror. The semi-transparent mirror is used to reflect the light emitted from the rotating prism unit into the focusing unit. The CCD camera is used to observe the processing plane of the workpiece to be processed through the semi-transparent mirror and obtain the light spot movement trajectory.

[0010] The focusing unit is used to focus the incoming laser beam onto the workpiece to be processed.

[0011] The controller is used to control the angle of the galvanometer in the dual galvanometer modulation unit according to the trajectory of the light spot.

[0012] Optionally, the X1 and X2 galvanometers compensate each other in adjusting the laser beam in the X direction; the X1 and X2 galvanometers sequentially adjust the propagation direction of the laser beam in the X direction by a first angle to adjust the position translation of the laser beam in the X direction; the X2 galvanometer adjusts the propagation direction of the laser beam in the X direction by a second angle to adjust the angle deflection of the laser beam in the X direction.

[0013] Optionally, the Y1 and Y2 galvanometers compensate each other in adjusting the laser beam in the Y direction; the Y1 and Y2 galvanometers sequentially adjust the propagation direction of the laser beam in the Y direction by a first angle to adjust the position translation of the laser beam in the Y direction; the Y2 galvanometer adjusts the propagation direction of the laser beam in the Y direction by a second angle to adjust the angle deflection of the laser beam in the Y direction.

[0014] Optionally, the Daowei prism rotation unit includes a Daowei prism and a mechanical component that drives its rotation. The mechanical component includes a mechanical sleeve and a motor. The Daowei prism is disposed inside the mechanical sleeve and is fixedly connected to the mechanical sleeve. There is a preset angle and a preset translation distance between the central axis of the Daowei prism and the axis of the mechanical component. The motor drives the mechanical sleeve to rotate.

[0015] Optionally, the focus of the CCD camera is adjustable, and the CCD camera is also used to observe and acquire the movement trajectory of the light spot after the focus is changed.

[0016] In a second aspect, the present invention also provides a rapid alignment and adjustment method for a Dove prism rotary cutting system, applied to a rapid alignment and adjustment device for a Dove prism rotary cutting system as described in any of the first aspects, comprising:

[0017] The CCD visual unit acquires the light spot movement trajectory on the processing plane of the workpiece to be processed;

[0018] Calculate the position translation error and angle deflection error of the incident laser beam entering the rotating unit of the Daowei prism based on the laser spot motion trajectory;

[0019] By adjusting the angles of the X1 and X2 galvanometers, the position translation error and angle deflection error of the laser beam in the X direction are adjusted; by adjusting the angles of the Y1 and Y2 galvanometers, the position translation error and angle deflection error of the laser beam in the Y direction are adjusted.

[0020] Optionally, acquiring the light spot motion trajectory on the processing plane of the workpiece through the CCD visual unit includes:

[0021] Obtain the trajectory of the first spot of the laser beam on the focal plane of the laser focusing system;

[0022] Adjust the focal position of the CCD visual unit shown, and observe the trajectory of the second spot of the laser beam at a distance of 1mm from the focal plane of the laser focusing system.

[0023] Optionally, the step of calculating the positional translation error and angular deflection error of the incident laser beam entering the Dowell prism rotating unit relative to the target position and target angle based on the laser spot motion trajectory includes:

[0024] Based on the first spot coordinates (x) of the first spot's motion trajectory j ,y j Calculate the distance D between the light spot and the origin of the focal plane. j ;

[0025] When distance At that time, the angular error between the incident laser beam and the mechanical axis in the X direction was calculated. In the Y direction, the angular error between the incident laser beam and the mechanical axis Where f is the focal length of the focusing unit;

[0026] Calculate the coordinates (x) of the second spot on the trajectory of the second spot. low ,y low ) and the coordinates of the first spot (x) j ,y j The projected distances Δx and Δy on the focal plane;

[0027] when or When calculating the position translation error d in the X direction. ex =f(x) low -x j )-x j Calculate the translation error d in the Y direction. ey =f(y low -y j )-y j .

[0028] Optionally, adjusting the position translation error and angle deflection error of the laser beam in the X direction by adjusting the X1 and X2 galvanometers; and adjusting the position translation error and angle deflection error of the laser beam in the Y direction by adjusting the Y1 and Y2 galvanometers, includes:

[0029] Control the X1 and X2 galvanometers to adjust the first angle in the X direction. This is used to compensate for the positional translation error of the laser beam in the X direction; wherein, the distance between the X1 and X2 galvanometers is L. x ;

[0030] Control the X2 galvanometer to adjust the second angle in the X direction. Used to compensate for the angular deflection error of the laser beam in the X direction;

[0031] Control the Y1 and Y2 galvanometers to adjust the first angle in the Y direction. This is used to compensate for the positional translation error of the laser beam in the Y direction; wherein, the distance between mirror Y1 and mirror Y2 is L. y ;

[0032] Control the Y2 galvanometer to adjust the second angle in the Y direction This is used to compensate for the angular deflection error of the laser beam in the Y direction.

[0033] Overall, compared with the prior art, the above-described technical solutions conceived by this invention have the following beneficial effects:

[0034] (1) The present invention provides a rapid alignment adjustment device and method for a Daowei prism rotary cutting system. By directly observing the movement of the light spot at the focal plane and above and below the focal plane, the position and angle of the incident laser beam of the system are obtained. The error is automatically corrected based on the position and angle data of the incident laser beam. This solves the problem that when the laser beam incident into the system does not coincide with the mechanical axis, the hole diameter of the small hole will be incorrect and the taper cannot be controlled.

[0035] (2) The present invention provides a rapid alignment and adjustment device for the Daowei prism rotary cutting system, which has an automatic calibration function and can integrate the system into a small rotary cutting module, thereby improving the installability and flexibility of the rotary cutting system. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of a rapid alignment and adjustment device for a Daowei prism rotary cutting system provided in an embodiment of the present invention;

[0037] Figure 2 This is a flowchart illustrating a rapid alignment and adjustment method for a Dowell prism rotary cutting system provided in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached drawings: 1. Y1 galvanometer; 2. X1 galvanometer; 3. X2 galvanometer; 4. Y2 galvanometer; 5. Mechanical component; 6. Dowell prism; 7. Semi-transparent mirror; 8. CCD camera; 9. Focusing unit; 10. Workpiece to be processed. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] The following description, in conjunction with a preferred embodiment, illustrates the content involved in the above embodiments.

[0042] like Figure 1 As shown, a rapid alignment and adjustment device for a Dowell prism rotary cutting system includes a dual-mirror modulation unit, a Dowell prism rotation unit, a CCD viewing unit and a focusing unit 9 arranged sequentially on the incident laser beam path, as well as a controller (not shown) connected to each unit respectively.

[0043] The dual-mirror modulation unit includes a set of X1 mirror 2 and X2 mirror 3 for controlling beam adjustment in the X direction, and a set of Y1 mirror 1 and Y2 mirror 4 for controlling beam adjustment in the Y direction. These are used to adjust the position translation and angle deflection of the laser beam in the X and Y directions, respectively, so that the laser beam coincides with the mechanical axis of the Daowei prism rotation unit.

[0044] The Daowei prism rotation unit is used to modulate the static laser beam that has passed through the dual-mirror modulation unit into a dynamic outgoing beam that moves in a circular trajectory.

[0045] The CCD visual unit includes a CCD camera 8 and a semi-transparent mirror 7. The semi-transparent mirror 7 is used to reflect the light emitted from the rotating prism unit into the focusing unit 9. The CCD camera 8 is used to observe the processing plane of the workpiece 10 to be processed through the semi-transparent mirror 7 and obtain the light spot movement trajectory.

[0046] The focusing unit 9 is used to focus the incoming laser beam onto the workpiece to be processed.

[0047] The controller is used to control the angle of the galvanometer in the dual galvanometer modulation unit according to the trajectory of the light spot.

[0048] The laser beam emitted from the light source enters the rapid alignment and adjustment device of the Daowei prism rotary cutting system. It sequentially passes through multiple mirrors in the initial dual-mirror modulation unit. Initially, the four mirrors in the dual-mirror modulation unit are at zero degrees by default, preventing any shift in the relative mechanical axis position or angular deflection of the beam. The static laser beam, after passing through the dual-mirror modulation unit, is refracted and rotated by the Daowei prism rotation unit, generating a dynamic outgoing beam moving in a circular trajectory. This dynamic outgoing beam is reflected by the semi-transparent mirror 7 and enters the focusing unit 9. Under the action of the focusing unit 9, the laser beam is focused onto the processing plane of the workpiece 10. The CCD camera 8 in the CCD viewing unit observes the spot formed by the laser beam on the processing plane and acquires the trajectory of the spot. The processing plane of the workpiece 10 and the focal plane of the CCD camera 8 are aligned.

[0049] The controller, connected to the CCD visual unit, can determine the relationship between the laser beam entering the device and the mechanical axis based on the laser spot's motion trajectory. For example, a laser beam not coinciding with the mechanical axis will produce different rotational trajectories after passing through the Daowei prism rotation unit; when the angle between the laser beam and the mechanical axis is less than 0° (i.e., the laser beam deviates towards the mechanical axis), the laser beam trajectory emitted from the Daowei prism is convergent; when the angle is greater than 0° (i.e., the laser beam deviates towards the mechanical axis), the laser beam trajectory emitted from the Daowei prism is divergent; when the angle is equal to 0° (i.e., the laser beam is parallel to the mechanical axis), the laser beam trajectory emitted from the Daowei prism is cylindrical; when the laser beam is completely aligned with the mechanical axis, the laser beam emitted from the Daowei prism rotates in place and does not produce circular motion centered on the system's mechanical axis. Based on the determination of the laser spot's motion trajectory, the controller adjusts the galvanometers in the dual-mirror modulation unit, thereby adjusting the positional translation and angular deflection in the X and Y directions.

[0050] Optionally, the focus of the CCD camera 8 is adjustable, and the CCD camera 8 is also used to observe and acquire the movement trajectory of the light spot after the focus is changed.

[0051] The CCD camera 8 requires a corresponding up-and-down adjustment system. When using this system, the CCD camera 8 focuses on the focal plane of the laser focusing system and positions 1mm before and after it, obtaining the laser beam displacement at these positions during processing. By obtaining multiple beam trajectory data, corresponding calibration reference data is calculated. The incident laser beam is then adjusted using a dual-mirror modulation unit, thus completing the automatic calibration process for the incident beam of the Daowei prism.

[0052] Optionally, the X1 galvanometer 2 and X2 galvanometer 3 compensate each other in adjusting the laser beam in the X direction; the X1 galvanometer 2 and X2 galvanometer 3 sequentially adjust the propagation direction of the laser beam in the X direction by a first angle to adjust the position translation of the laser beam in the X direction; the X2 galvanometer 3 adjusts the propagation direction of the laser beam in the X direction by a second angle to adjust the angle deflection of the laser beam in the X direction.

[0053] Optionally, the Y1 galvanometer 1 and the Y2 galvanometer 4 compensate each other in adjusting the beam in the Y direction; the Y1 galvanometer 1 and the Y2 galvanometer 4 sequentially adjust the propagation direction of the laser beam in the Y direction by a first angle to adjust the position translation of the laser beam in the Y direction; the Y2 galvanometer 4 adjusts the propagation direction of the laser beam in the Y direction by a second angle to adjust the angle deflection of the laser beam in the Y direction.

[0054] After the dual-mirror modulation unit adjusts the position translation and angle deflection of the laser beam in the X and Y directions, the laser beam coincides with the mechanical axis of the Daowei prism rotation unit. The laser beam is then focused onto the processing plane of the workpiece to be processed, producing the required small hole.

[0055] In addition to calibrating the incident beam, the dual-mirror modulation unit is further used to offset and deflect the incident beam of the Daowei prism rotation unit according to the size and taper of the micro-hole to be processed in the workpiece 10.

[0056] like Figure 1 As shown, optionally, the Daowei prism rotation unit includes a Daowei prism 6 and a mechanical component 5 that drives its rotation. The mechanical component 5 includes a mechanical sleeve and a motor. The Daowei prism 6 is disposed inside the mechanical sleeve and is fixedly connected to the mechanical sleeve. There is a preset angle and a preset translation distance between the central axis of the Daowei prism 6 and the axis of the mechanical component 5. The motor drives the mechanical sleeve to rotate.

[0057] The preset included angle and preset translation distance are used to adjust the processing error of the Daowei prism 6. The angle and position of the Daowei prism 6 inside the mechanical sleeve are determined by the processing error of the Daowei prism 6, which is random. The mechanical sleeve is driven by a servo motor to rotate at high speed, so that the Daowei prism 6 can rotate at high speed around the mechanical axis. As the core component of the rotary cutting system, the high-speed rotation of the Daowei prism 6 causes the laser beam passing through the Daowei prism 6 to form a rotating spot on the processing surface of the workpiece 10, which performs drilling processing on the workpiece.

[0058] The technical solution of this invention involves a dual-mirror modulation unit, a Daowei prism rotation unit, a CCD viewing unit, and a focusing unit sequentially arranged in the rapid alignment and adjustment device of the Daowei prism rotary cutting system. After passing through the dual-mirror modulation unit, the Daowei prism rotation unit, the semi-transparent mirror, and the focusing unit, the incident laser beam is focused onto the workpiece to be processed. The CCD viewing unit observes the processing plane of the workpiece to obtain the light spot movement trajectory and controls the mirrors of the dual-mirror modulation unit according to the light spot movement trajectory. The dual-mirror modulation unit includes a set of X1 and X2 mirrors and a set of Y1 and Y2 mirrors, which are used to adjust the position translation and angle deflection of the laser beam in the X and Y directions, respectively, so that the laser beam coincides with the mechanical axis of the Daowei prism rotation unit. This invention solves the technical problems of the rotary cutting system with a dual-galvanometer prism assembly, which cannot automatically compensate for angular deflection errors and position translation errors, and has errors between the laser beam and the mechanical axis, resulting in incorrect hole diameter and uncontrollable taper in small hole processing. It achieves the beneficial effect of automatic calibration of the incident beam of the prism based on the position and angle data of the incident laser beam.

[0059] Example 2

[0060] like Figure 2 As shown, a rapid alignment and adjustment method for a Dowell prism rotary cutting system, applied to the rapid alignment and adjustment device of the Dowell prism rotary cutting system in the above embodiment, includes:

[0061] S1. Obtain the motion trajectory of the light spot on the processing plane of the workpiece through the CCD visual unit.

[0062] S2. Calculate the position translation error and angle deflection error of the incident laser beam entering the rotating unit of the Daowei prism based on the trajectory of the laser spot.

[0063] S3. Adjust the position translation error and angle deflection error of the laser beam in the X direction by adjusting the angles of X1 and X2 galvanometers; adjust the position translation error and angle deflection error of the laser beam in the Y direction by adjusting the angles of Y1 and Y2 galvanometers.

[0064] The laser beam enters the rapid alignment and adjustment device of the Daowei prism rotary cutting system. After passing through the initial state of the dual galvanometer modulation unit, the relative displacement and relative angle between the laser beam and the mechanical axis of the system remain unchanged. The laser beam enters the Daowei prism rotation unit, forming a circular trajectory with position translation error and angle error. It is then reflected by a semi-transparent and semi-reflective mirror into the focusing unit and focused on the workpiece, forming a specific circular trajectory on the workpiece.

[0065] The circular laser beam emitted from the Daowei prism rotating unit can form different converging postures after being focused by the focusing unit. Different incident beam angles control the convergence or divergence of the circular trajectory, and different incident beam positions control the size of the circular trajectory. Specifically, the Daowei prism rotates around a mechanical axis, and the distance between the laser beam's incident position and the mechanical axis is equal to the size of the circular trajectory emitted from the Daowei prism rotating unit. The position and angle data of the incident laser beam in the Daowei prism unit are determined by observing the focal plane and the size of the laser beam scanning trajectory circle above and below the focal plane through the CCD visual unit. This data is then fed back to the controller, which generates corresponding control signals to control the dual-mirror modulation unit, automatically correcting errors in the incident laser beam.

[0066] Optionally, S1 specifically includes:

[0067] S11. Obtain the trajectory of the first spot of the laser beam on the focal plane of the laser focusing system.

[0068] S12. Adjust the focal position of the CCD visual unit shown, and observe the second spot movement trajectory of the laser beam at a distance of 1mm from the focal plane of the laser focusing system.

[0069] By obtaining the trajectory of the laser beam at the focal plane and its vertical position using the CCD visualization unit, the position and angle of the incident laser beam at the Dove prism rotation unit can be determined. Let X be the laser beam at the focal plane. j and Y j Let X be a two-dimensional plane with coordinate axes, and the origin of the focal plane be the intersection of the focal plane and the mechanical axis of the system. Without rotating the Dove prism, adjust the focus position of the CCD camera to observe the spot position 1 mm below the focal plane of the Dove prism rotary cutting system's rapid alignment adjustment device. Let X be the coordinate plane at the point where the focal plane is 1 mm below the focal plane. low and Y low A two-dimensional plane is formed for the coordinate axes, with the origin at the intersection of this plane and the machine axis.

[0070] Optionally, S2 specifically includes:

[0071] S21. Based on the coordinates (x) of the first light spot according to the trajectory of the first light spot. j ,yj Calculate the distance D between the light spot and the origin of the focal plane. j ;

[0072] When distance At that time, the angular error between the incident laser beam and the mechanical axis in the X direction was calculated. In the Y direction, the angular error between the incident laser beam and the mechanical axis Where f is the focal length of the focusing unit.

[0073] The coordinates of the light spot at the focal point are represented by (x) j ,y j () represents the distance between the light spot on the focal plane and the origin of the focal plane in the initial state. At that time, the controller determines that there is a relative angular error between the incident beam angle and the mechanical axis and records it (x). j ,y j ). Calculate the angular error in the X direction separately. angular error in the Y direction

[0074] S22. Calculate the coordinates (x) of the second light spot to determine its motion trajectory. low ,y low ) and the coordinates of the first spot (x) j ,y j The projected distances Δx and Δy on the focal plane;

[0075] when or When calculating the position translation error d in the X direction. ex =f(x) low -x j )-x j Calculate the translation error d in the Y direction. ey =f(y low -y j )-y j .

[0076] After adjusting the CCD camera focus, the position of the light spot acquired again is represented by (x). low ,y low This indicates that the plane containing the second light spot is located 1 mm away from the focal plane of the laser focusing system. When the coordinates of the second light spot (x...)... low ,y low ) and the coordinates of the first spot (x) j ,y j Projected distance on the focal plane and At that time, the controller determines that there is a horizontal positional error in the X or Y direction between the incident beam and the mechanical axis, and adjusts the position accordingly (x...low ,y low ) and (x j ,y j ) Calculate the positional translation error between the laser beams in the X and Y directions and the mechanical axis when they are incident.

[0077] Optionally, S3 specifically includes:

[0078] S31. Control the X1 and X2 galvanometers to adjust the first angle in the X direction. This is used to compensate for the translational error of the laser beam in the X direction; where the distance between mirror X1 and mirror X2 is L. x .

[0079] S32. Control the X2 galvanometer to adjust the second angle in the X direction. It is used to compensate for the angular deflection error of the laser beam in the X direction.

[0080] S33, Control the Y1 and Y2 galvanometers to adjust the first angle in the Y direction. This is used to compensate for the positional translation error of the laser beam in the Y direction; where the distance between mirror Y1 and mirror Y2 is L. y .

[0081] S34. Control the Y2 galvanometer to adjust the second angle in the Y direction. It is used to compensate for the angular deflection error of the laser beam in the Y direction.

[0082] When correcting the error between the incident laser beam and the mechanical axis, the two sets of galvanometers in the dual galvanometer group are first adjusted together to correct the position translation error in the X or Y direction, and then one of the galvanometers in the set is adjusted separately to correct the angle deflection error in the X or Y direction.

[0083] The technical solution of this invention uses a CCD visual unit to observe the processing plane of the workpiece to be processed, obtain the first spot motion trajectory, adjust the focal position of the CCD visual unit, and observe the second spot motion trajectory of the laser beam at a distance of 1mm from the focal plane of the laser focusing system. Based on the spot motion trajectory, debugging reference data is obtained, and the galvanometers of the dual-galvanometer modulation unit are controlled. The X1, X2, Y1, and Y2 galvanometers are used to compensate for the position translation error and angle deflection error of the laser beam in the X and Y directions, respectively, so that the laser beam coincides with the mechanical axis of the Daowei prism rotation unit. This solves the technical problems of the Daowei prism combination rotary cutting system with dual galvanometer units, which cannot automatically compensate for angle deflection errors and position translation errors, and where errors exist between the laser beam and the mechanical axis, resulting in incorrect hole diameter and uncontrollable taper during small hole processing. It achieves the beneficial effect of automatically calibrating the incident beam of the Daowei prism based on the position and angle data of the incident laser beam.

[0084] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rapid alignment and adjustment device for a Dove prism rotary cutting system, characterized in that, It includes a dual-mirror modulation unit, a Dowell prism rotation unit, a CCD viewing unit and a focusing unit arranged sequentially on the optical path of the incident laser beam, as well as a controller connected to each unit respectively. The dual-mirror modulation unit includes a set of X1 and X2 mirrors for controlling beam adjustment in the X direction, and a set of Y1 and Y2 mirrors for controlling beam adjustment in the Y direction. These mirrors are used to adjust the position translation and angle deflection of the laser beam in the X and Y directions, respectively, so that the laser beam coincides with the mechanical axis of the Daowei prism rotation unit. The Daowei prism rotation unit is used to adjust the static laser beam that has passed through the dual-mirror modulation unit into a dynamic outgoing beam that moves in a circular trajectory. The CCD viewing unit includes a CCD camera and a semi-transparent mirror. The semi-transparent mirror is used to reflect the light emitted from the rotating prism unit into the focusing unit. The CCD camera is used to observe the processing plane of the workpiece to be processed through the semi-transparent mirror and obtain the light spot movement trajectory. The focusing unit is used to focus the incoming laser beam onto the workpiece to be processed. The controller is used to control the angle of the galvanometer in the dual galvanometer modulation unit according to the trajectory of the light spot.

2. The apparatus as claimed in claim 1, characterized in that, The X1 and X2 galvanometers compensate each other in adjusting the laser beam in the X direction; the X1 galvanometer adjusts the propagation direction of the laser beam by a first angle in the X direction to adjust the position translation of the laser beam in the X direction; the X2 galvanometer adjusts the propagation direction of the laser beam by a second angle in the X direction to adjust the angle deflection of the laser beam in the X direction.

3. The apparatus as described in claim 1, characterized in that, The Y1 and Y2 galvanometers compensate each other in adjusting the laser beam in the Y direction; the Y1 galvanometer adjusts the propagation direction of the laser beam by a first angle in the Y direction to adjust the position translation of the laser beam in the Y direction; the Y2 galvanometer adjusts the propagation direction of the laser beam by a second angle in the Y direction to adjust the angle deflection of the laser beam in the Y direction.

4. The apparatus as claimed in claim 1, characterized in that, The Daowei prism rotation unit includes a Daowei prism and a mechanical component that drives its rotation. The mechanical component includes a mechanical sleeve and a motor. The Daowei prism is disposed inside the mechanical sleeve and is fixedly connected to the mechanical sleeve. There is a preset angle and a preset translation distance between the central axis of the Daowei prism and the axis of the mechanical component. The motor drives the mechanical sleeve to rotate.

5. The apparatus as claimed in claim 1, characterized in that, The focus of the CCD camera is adjustable, and the CCD camera is also used to observe and acquire the movement trajectory of the light spot after the focus is changed.

6. A rapid alignment and adjustment method for a Dove prism rotary cutting system, applied to the rapid alignment and adjustment device for the Dove prism rotary cutting system as described in any one of claims 1-5, characterized in that, include: The CCD visual unit acquires the light spot movement trajectory on the processing plane of the workpiece to be processed; Calculate the position translation error and angle deflection error of the incident laser beam entering the rotating unit of the Daowei prism based on the laser spot motion trajectory; By adjusting the angles of the X1 and X2 galvanometers, the position translation error and angle deflection error of the laser beam in the X direction are adjusted; by adjusting the angles of the Y1 and Y2 galvanometers, the position translation error and angle deflection error of the laser beam in the Y direction are adjusted.

7. The method as described in claim 6, characterized in that, The acquisition of the light spot motion trajectory on the processing plane of the workpiece through the CCD visual unit includes: Obtain the trajectory of the first spot of the laser beam on the focal plane of the laser focusing system; Adjust the focal position of the CCD visual unit shown, and observe the trajectory of the second spot of the laser beam at a distance of 1mm from the focal plane of the laser focusing system.

8. The method as described in claim 7, characterized in that, The calculation of the positional translation error and angular deflection error of the incident laser beam entering the Dowell prism rotating unit based on the laser spot motion trajectory includes: Based on the coordinates of the first spot's motion trajectory ( , Calculate the distance D between the light spot and the origin of the focal plane. j ; When distance At that time, the angular error between the incident laser beam and the mechanical axis in the X direction was calculated. In the Y direction, the angular error between the incident laser beam and the mechanical axis ;in, The focal length of the focusing unit; Calculate the coordinates of the second spot on the trajectory of the second spot. , ) and the coordinates of the first spot ( , The projected distances Δx and Δy on the focal plane; when or When calculating the position translation error in the X direction... Calculate the translation error in the Y direction. .

9. The method as described in claim 8, characterized in that, The adjustment of the laser beam's position translation error and angle deflection error in the X direction by adjusting the X1 and X2 galvanometers; and the adjustment of the laser beam's position translation error and angle deflection error in the Y direction by adjusting the Y1 and Y2 galvanometers, includes: Control the X1 and X2 galvanometers to adjust the first angle in the X direction. This is used to compensate for the positional translation error of the laser beam in the X direction; wherein, the distance between the X1 and X2 galvanometers is... ; Control the X2 galvanometer to adjust the second angle in the X direction. This is used to compensate for the angular deflection error of the laser beam in the X direction; Control the Y1 and Y2 galvanometers to adjust the first angle in the Y direction. This is used to compensate for the positional translation error of the laser beam in the Y direction; wherein, the distance between mirror Y1 and mirror Y2 is... ; Control the Y2 galvanometer to adjust the second angle in the Y direction This is used to compensate for the angular deflection error of the laser beam in the Y direction.

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