Cam point changing device and using method thereof

Abstract

The invention provides a cam point changing device, which comprises a frame body, two jackscrew mechanisms, a cam, a mounting rack and a frequency doubling crystal, and is characterized in that the frame body is fixed outside and is internally hollow; the two jackscrew mechanisms are both connected to the frame body in a sliding mode, and the two jackscrew mechanisms are perpendicularly arranged. The cam is located in the frame body and can rotate in the circumferential direction relative to the frame body. One ends of the two jackscrew mechanisms abut against the outer side wall of the cam, the other ends of the two jackscrew mechanisms are slidably connected with the mounting frame, and the frequency doubling crystal is arranged on the mounting frame; the device comprises a cam, the outer side wall of the cam is provided with four sub-sections, the cross sections of the four sub-sections are all in curve shapes and different in meandering diameter, the cam rotates in the circumferential direction to enable a jackscrew mechanism to slide, and a frequency doubling crystal is driven to move and change points in the horizontal direction and the vertical direction of the frequency doubling crystal, and through a single-motor and single-cam structure, back-and-forth switching of different working point positions of the same crystal is achieved. The structure is simplified, the size of the device is reduced, and the integrated design of an overall structure light path scheme is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of laser processing technology, and in particular to a cam point changing device and a use method thereof. Background Art

[0002] As an irreplaceable type of laser in laser products, solid-state lasers have a wide range of applications and are the focus of development in the new generation of laser industry. Among them, solid-state laser optical device frequency doubling crystals are important devices for converting laser types, but their service life is relatively short compared to other devices, thus affecting the service life of the entire machine.

[0003] The laser frequency doubling crystal point changing device and control method with publication number CN118156957A, the laser frequency doubling crystal point changing device comprises a mounting seat, a crystal assembly, a first guide mechanism, a second guide mechanism and a detection mechanism, the crystal assembly comprises a frequency doubling crystal and a sliding seat, the sliding seat is slidably arranged on the mounting seat, the frequency doubling crystal is arranged on the sliding seat, the first guide mechanism is mounted on the mounting seat, the first guide mechanism is connected to the sliding seat and is used to drive the sliding seat to move along a first direction, the second guide mechanism is mounted on the mounting seat, the second guide mechanism is connected to the sliding seat and is used to drive the sliding seat to move along a second direction, the detection mechanism comprises a first detection component and a second detection component, the first detection component and the second detection component are used to detect the point changing position of the frequency doubling crystal, the frequency doubling crystal automatically changes point from the origin point to the last point position, so as to realize the precise movement and automatic point changing of the frequency doubling crystal.

[0004] At present, most of the solid-state laser frequency doubling crystal point changing solutions are mostly vertical or single-direction point changing. The point can be changed but the number of change points is limited. Some of them use multi-motor multi-directional point changing and increase the number of motors to achieve dual-axis point changing. This will increase the size of the structure and is not conducive to the integrated design of the overall structural optical path solution. Summary of the invention

[0005] In view of this, the present invention proposes a cam point changing device and a method of using the same cam point changing device, which realizes switching back and forth between different working points of the same crystal through a single motor and a single cam structure, simplifies the structure, reduces the size of the device, and is beneficial to the integrated design of the overall structural optical path solution.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a cam point changing device, including a frame, two top screw mechanisms, a cam, a mounting frame and a frequency doubling crystal, wherein:

[0007] The frame is fixed on the outside and is hollow inside;

[0008] The two jack screw mechanisms are both slidably connected to the frame, and the two jack screw mechanisms are vertically arranged;

[0009] The cam is located in the frame and can rotate circumferentially relative to the frame;

[0010] One end of the two top screw mechanisms is in contact with the outer side wall of the cam, and the other end is slidably connected with the mounting frame, and the frequency doubling crystal is arranged on the mounting frame;

[0011] The outer side wall of the cam is provided with four sections, the cross-sections of the four sections are all curved, and the curvatures are all different. The cam rotates circumferentially to slide the top screw mechanism, driving the frequency doubling crystal to move and change points along its horizontal and vertical directions.

[0012] On the basis of the above technical scheme, preferably, the four sub-segments are a bottom plane curve segment, a rising curve segment, a high plane curve segment and a descending curve segment, wherein the bottom plane curve segment, the rising curve segment, the high plane curve segment and the descending curve segment are connected sequentially along the axis of the cam member; when the cam rotates circumferentially, one end of the two top screw mechanisms away from the mounting frame abuts against two different and adjacent curve segments of the cam, and the circumferential rotation of the cam causes the frequency doubling crystal to change points along a rectangular motion trajectory.

[0013] Based on the above technical solution, preferably, the bottom plane curve segment and the high plane curve segment are both arc-shaped, and the bottom plane curve segment and the high plane curve segment coincide with the axis of the cam, and the radius of the bottom plane curve segment is equal to 1 / 2 of the radius of the high plane curve segment.

[0014] On the basis of the above technical solution, preferably, the ascending curve segment and the descending curve segment are symmetrically arranged along the central axis of the cam, and the cross-sectional shapes of the ascending curve segment and the descending curve segment both tend to be concave first and convex later.

[0015] On the basis of the above technical solution, preferably, the thimble mechanism includes a gear transmission assembly, a thimble member and a sliding assembly, wherein:

[0016] The gear transmission assembly is arranged on the frame, and the gear transmission assembly has two movable ends arranged in opposite directions, and the two movable ends move synchronously toward each other;

[0017] The ejector pin is fixed on the movable end of the gear transmission assembly close to the cam, and the ejector pin abuts against the outer side wall of the cam;

[0018] The sliding assembly is arranged on one side of the mounting frame close to the frame body, and the sliding assembly and the adjacent gear transmission assembly are arranged perpendicularly. The sliding assembly is provided with a sliding part, and the other movable end of the gear transmission assembly is fixed to the sliding part of the sliding assembly.

[0019] On the basis of the above technical solution, preferably, the gear transmission assembly includes two gear slides, a mounting seat, a main gear and a sub gear, wherein:

[0020] A window is provided on the side of the frame;

[0021] The two gear sliding members are both slidably connected in the window and are not in the same plane, and the gear sliding members serve as the movable ends of the gear transmission assembly;

[0022] The mounting seat is arranged on the frame body and is arranged corresponding to the position of the window;

[0023] The main gear and the auxiliary gear are both rotatably connected to the inner side of the mounting seat and are respectively arranged corresponding to the positions of the two gear sliding members. The main gear is meshed with the gear sliding member close to the cam side, and the auxiliary gear is meshed with the other gear sliding member. The diameter of the main gear is larger than that of the auxiliary gear.

[0024] The ejector pin is fixed on a gear sliding member meshing with the main gear, is located at a side away from the mounting frame, and abuts against an outer side wall of the cam.

[0025] On the basis of the above technical solution, preferably, the sliding assembly includes a plurality of ball bearings and a sliding seat, wherein:

[0026] The shape of the mounting frame is a broken line, and a plurality of slide grooves are provided on one side of the mounting frame adjacent to the frame, and the shape of the slide grooves is V-shaped;

[0027] The slide seat is fixed to the gear slide member on the side away from the cam;

[0028] A plurality of ball bearings are movably arranged on a side of the slide seat away from the gear slide, and the plurality of ball bearings are respectively abutted in corresponding slide grooves.

[0029] On the basis of the above technical solution, preferably, it also includes at least two tension spring members, at least two tension spring members are fixed between the frame and the mounting bracket, and at least two tension spring members are respectively located on the two side surfaces adjacent to the mounting bracket and the frame, respectively applying horizontal and vertical forces, so that the ejector pin is always in contact with the outer side wall of the cam.

[0030] On the basis of the above technical solution, preferably, it further comprises a driving member, wherein the driving member is fixed on the outside, an output shaft of the driving member is fixedly connected to the axis of the cam, and the driving member drives the cam to rotate circumferentially in the frame.

[0031] In a second aspect, the present invention further provides a method for using a cam point changing device, which is implemented using the above-mentioned cam point changing device and includes the following steps:

[0032] S1, when the frequency doubling crystal is at the initial position, one end of its ejector pin abuts against the junction of the rising curve segment and the bottom plane curve segment, and one end of the other ejector pin abuts against the junction of the rising curve segment and the high plane curve segment;

[0033] S2, the driving member drives the cam to rotate clockwise in the frame, and the two ejector pins perform linear motion alternately, so that the frequency doubling crystal changes points along a rectangular motion trajectory; the ejector screw mechanism on the horizontal side shortens the stroke through the corresponding gear transmission assembly, so that the frequency doubling crystal moves in the horizontal direction, and the ejector screw mechanism on the vertical side slides horizontally on the mounting frame through the sliding assembly; the ejector screw mechanism on the vertical side shortens the stroke through the corresponding gear transmission assembly, so that the frequency doubling crystal moves in the vertical direction, and the ejector screw mechanism on the horizontal side slides vertically on the mounting frame through the sliding assembly;

[0034] S3, when the cam rotates circumferentially, one end of the ejector moves along the surface contour of the ascending curve segment, and one end of the other ejector moves along the surface contour of the high plane curve segment, so that the frequency doubling crystal moves from the initial position along its longitudinal vertical direction toward the second plane, until one end of the ejector abuts against the junction of the ascending curve segment and the high plane curve segment, and one end of the other ejector abuts against the junction of the high plane curve segment and the descending curve segment, and the position after the movement is used as the initial position of the second plane;

[0035] When the cam rotates circumferentially, one end of the ejector moves along the surface contour of the high plane curve segment, and one end of the other ejector moves along the surface contour of the descending curve segment, so that the frequency doubling crystal moves from the initial position of the second plane along its horizontal lateral direction until one end of the ejector abuts against the intersection of the high plane curve segment and the descending curve segment, and one end of the other ejector abuts against the intersection of the descending curve segment and the bottom plane curve segment, and the position after the movement is used as the end position of the second plane;

[0036] The cam rotates circumferentially, and one end of the ejector moves along the surface contour of the descending curve segment, and one end of the other ejector moves along the surface contour of the bottom plane curve segment, so that the frequency doubling crystal moves from the end position of the second plane along its longitudinal vertical direction toward the initial position side, until one end of the ejector abuts against the intersection of the descending curve segment and the bottom plane curve segment, and one end of the other ejector abuts against the intersection of the bottom plane curve segment and the ascending curve segment. The position after the movement is used as the end position of the first plane.

[0037] The cam rotates circumferentially, one end of the ejector moves along the surface contour of the bottom plane curve segment, and one end of the other ejector moves along the surface contour of the ascending curve segment, so that the frequency doubling crystal moves from the end position of the first plane to the initial position, completing the laser processing of one cycle of the frequency doubling crystal;

[0038] The rising curve segment and the falling curve segment make the moving distance of the frequency doubling crystal equal to a whole row of processing points in the longitudinal direction, and the high plane curve segment and the bottom plane curve segment make the moving distance of the frequency doubling crystal equal to one step processing point in the transverse direction;

[0039] S4, the cam point changing device is horizontally moved by two step processing points through the external displacement device, and steps S1-S4 are repeated to complete the laser processing of all points of the entire frequency doubling crystal.

[0040] The cam point changing device and the use method thereof of the present invention have the following beneficial effects compared with the prior art:

[0041] (1) Through the precise cam curve design and the sliding connection of the top screw mechanism, high-precision point changing operation can be achieved. Compared with the traditional multi-motor multi-directional point changing solution, the operation of the cam point changing device is simpler and faster, and the point changing efficiency is improved. In addition, the cam point changing device uses a single cam and two top screw mechanisms to achieve dual-axis point changing, which greatly simplifies the structure and reduces the size of the device, which is conducive to the integrated design of the overall structural optical path solution. At the same time, the cam point changing device can achieve a variety of point changing modes by adjusting the curve shape and size of the cam according to different point changing requirements, so that the cam point changing device has a wide range of applicability and can be applied to different types of solid-state lasers;

[0042] (2) The gear transmission assembly is set up to reduce the movement stroke of the two gear sliding parts by using the transmission ratio when the large and small gears have the same angular velocity, and the mounting frame is pushed to move by moving the large stroke and reducing the stroke, thereby improving the accuracy of the motion transmission between the cam and the mounting frame;

[0043] (3) The sliding assembly is provided to reduce the friction between the mounting frame and the top screw mechanism during movement, and at the same time solve the possibility of structural posture deflection of the mounting frame during movement, thereby ensuring the stability of the overall system during movement;

[0044] (4) By adding a tension spring structure between the frame and the mounting bracket, tension is applied in the horizontal and vertical axis directions, and the tension is transmitted through the ejector pin and the gear, so that the gear sliding part always moves in the direction of the cam axis. The end face of the ejector pin is always in contact with the outer contour of the cam, and derailment will not occur, thereby effectively ensuring the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a structural stereogram of the cam point changing device of the present invention;

[0047] Figure 2A schematic diagram of a cam segment of a cam point changing device of the present invention;

[0048] Figure 3 It is a structural front view of the cam point changing device of the present invention;

[0049] Figure 4 It is a schematic diagram of the top screw mechanism of the cam point changing device of the present invention;

[0050] Figure 5 It is a three-dimensional diagram of the top screw mechanism of the cam point changing device of the present invention;

[0051] Figure 6 It is a partial cross-sectional view of the sliding assembly of the cam point changing device of the present invention;

[0052] Figure 7 A schematic diagram of the cam motion relationship of the cam point changing device of the present invention;

[0053] Figure 8 It is a schematic diagram of a state in which the frequency doubling crystal of the cam point changing device of the present invention is in horizontal movement at a first height;

[0054] Fig. 9 It is a schematic diagram of a state in which the frequency doubling crystal of the cam point changing device of the present invention is moved from a first height to a second height;

[0055] Fig.10 It is a schematic diagram of a state in which the frequency doubling crystal of the cam point changing device of the present invention is in horizontal movement at a second height;

[0056] Fig.11 It is a schematic diagram of a state in which the frequency doubling crystal of the cam point changing device of the present invention is moving from the second height to the first height. DETAILED DESCRIPTION

[0057] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] At present, most of the solid-state laser frequency doubling crystal point changing solutions are mostly vertical or single-direction point changing. The point can be changed but the number of change points is limited. Some of them use multi-motor multi-directional point changing and increase the number of motors to achieve dual-axis point changing. This will increase the size of the structure and is not conducive to the integrated design of the overall structural optical path solution.

[0059] like Figure 1-6As shown, a cam point changing device of the present invention comprises a frame 1, two top screw mechanisms 2, a cam 3, a mounting frame 4 and a frequency doubling crystal 5, wherein the frame 1 is fixed on the outside and is hollow inside; the two top screw mechanisms 2 are slidably connected to the frame 1, and the two top screw mechanisms 2 are vertically arranged; the cam 3 is located in the frame 1 and can rotate circumferentially relative to the frame 1; one end of the two top screw mechanisms 2 abuts against the outer side wall of the cam 3, and the other end is slidably connected to the mounting frame 4, and the frequency doubling crystal 5 is arranged on the mounting frame 4; there are four sections on the outer side wall of the cam 3, and the cross-sectional shapes of the four sections are all curved, and the curvatures are all different, and the circumferential rotation of the cam 3 causes the top screw mechanism 2 to slide, driving the frequency doubling crystal 5 to move and change points along its horizontal and vertical directions.

[0060] It should be noted that this embodiment is a single-cam two-way point-changing structure design. This structure adopts a cam 3 plus a top screw mechanism 2. When the cam 3 rotates, the cam 3 structure has different distances from the axis center in the same direction due to the intercept points on the upper surface. The curved shape of its outer wall will push the top screw mechanism 2 to slide on the frame 1. The sliding motion is transmitted to the frequency doubling crystal through the mounting frame, allowing it to move in the horizontal and vertical directions, thereby realizing the point-changing operation.

[0061] Specifically, four partitions are designed on the outer wall of the cam 3, and the cross-sectional shape of each partition is curved, and the curvatures are different, so that the cam 3 can produce different pushing effects during the rotation process, thereby driving the top screw mechanism 2 to move in the horizontal and vertical directions; one end of the top screw mechanism 2 abuts against the outer wall of the cam, and the other end is slidably connected to the mounting frame, so when the cam 3 rotates, the top screw mechanism 2 will slide accordingly, and drive the frequency doubling crystal 5 to move through the mounting frame 4.

[0062] The cam point changing device in this embodiment can achieve high-precision point changing operation through precise cam 3 curve design and sliding connection of the top screw mechanism 2, meeting the requirements of the solid-state laser for the position accuracy of the frequency doubling crystal. In addition, the cam point changing device adopts a single cam 3 and two top screw mechanisms 2 to achieve dual-axis point changing, which greatly simplifies the structure and reduces the size of the device, which is beneficial to the integrated design of the overall structural optical path solution. At the same time, the cam point changing device can achieve a variety of point changing modes according to different point changing requirements by adjusting the curve shape and size of the cam 3, so that the cam point changing device has a wide range of applicability and can be applied to different types of solid-state lasers.

[0063] As a preferred embodiment, the four partition segments in this embodiment are a bottom plane curve segment 31, a rising curve segment 32, a high plane curve segment 33 and a descending curve segment 34, wherein the bottom plane curve segment 31, the rising curve segment 32, the high plane curve segment 33 and the descending curve segment 34 are connected sequentially along the axis of the cam member 3; when the cam 3 rotates circumferentially, one end of the two top screw mechanisms 2 away from the mounting frame 4 abuts against two different and adjacent curve segments of the cam 3, and the circumferential rotation of the cam 3 causes the frequency doubling crystal 5 to change points along a rectangular motion trajectory.

[0064] It should be noted that in order to meet the bidirectional displacement of the single cam 3, screw mechanisms 2 in different directions are added. In order to meet the requirement that the two screw mechanisms 2 have pushing displacements in different directions on the mounting frame 4 when the cam 3 rotates at different times, the two screw mechanisms 2 are arranged vertically, corresponding to the horizontal and vertical displacements of the mounting frame 4 respectively; in order to realize the control of the displacement of the two screw mechanisms 2 in different directions at the same rotation and time by the single cam 3 structure, the central axis of the cam 3 is taken as the midpoint and divided into four parts by two mutually perpendicular lines, namely, the bottom plane curve segment 31, the rising curve segment 32, the high plane curve segment 33 and the descending curve segment 34. These four sub-segments are connected in sequence along the axis of the cam 3 to form a complete cam 3 profile.

[0065] It can be understood that the bottom plane curve segment 31 is the starting position of the rotation of the cam 3, which is used to provide a stable initial contact point for the top screw mechanism 2. The transition section from the bottom plane curve segment 31 to the high plane curve segment 33 has a gradually rising curve shape, which is used to push the top screw mechanism 2 to move in the vertical direction. The high plane curve segment 33 is the highest point in the rotation process of the cam 3, and its curve shape is relatively flat. The high plane curve segment 33 transitions to, which is used to push the high point of the top screw mechanism 2 to move horizontally. The descending curve segment 34 transitions to the bottom plane curve segment 31, which is used to push the top screw mechanism 2 to return to the initial position in the vertical direction. When the cam 3 rotates circumferentially, the ends of the two top screw mechanisms 2 away from the mounting frame 4 will successively abut against two different and adjacent curve segments of the cam 3. Due to the different curvatures of the curve segments of the cam, the top screw mechanism 2 will be subjected to different driving forces, thereby sliding on the frame 1, and the sliding motion is transmitted to the frequency doubling crystal 5 through the mounting frame 4, so that it can change points along the rectangular motion trajectory.

[0066] The bottom plane curve segment 31 and the high plane curve segment 33 are both arc-shaped, and the bottom plane curve segment 31 and the high plane curve segment 33 coincide with the axis of the cam 3 , and the radius of the bottom plane curve segment 31 is equal to 1 / 2 of the radius of the high plane curve segment 33 .

[0067] It should be noted that since the radius ratio of the bottom plane curve segment 31 and the high plane curve segment 33 is 1:2, the cam 3 can produce more precise changes in the driving force during the rotation process, which helps to achieve more precise movement of the top screw mechanism 2 in the horizontal and vertical directions, thereby further improving the accuracy of the change point.

[0068] The ascending curve segment 32 and the descending curve segment 34 are symmetrically arranged along the central axis of the cam 3 , and the cross-sectional shapes of the ascending curve segment 32 and the descending curve segment 34 are both concave at first and convex at the later stage.

[0069] It should be noted that the ascending curve segment 32 and the descending curve segment 34 are symmetrically arranged along the central axis of the cam 3, ensuring that during the rotation of the cam, the driving force received by the top screw mechanism 2 in the ascending and descending stages is balanced, thereby avoiding the generation of unnecessary lateral force or torque, and ensuring the stability and accuracy of the point-changing process. The cross-sectional shape trends of the ascending curve segment 32 and the descending curve segment 34 are both concave at first and convex at the end. At the starting part of the ascending curve segment 32, i.e., the connection with the bottom plane curve segment 31, its cross-sectional shape presents a concave trend, which helps the top screw mechanism 2 to gradually accelerate and smoothly leave the bottom plane curve segment 3 at this stage. 1. As the cam continues to rotate, the cross-sectional shape of the ascending curve segment 32 gradually becomes a convex trend, which helps the top screw mechanism 2 to maintain a stable speed at this stage. Similarly, at the starting part of the descending curve segment 34, that is, the connection with the high plane curve segment 33, its cross-sectional shape also presents a convex trend, which helps the top screw mechanism 2 to gradually decelerate at this stage and smoothly enter the descending stage. As the cam continues to rotate, the cross-sectional shape of the descending curve segment 34 gradually becomes a concave trend, which helps the top screw mechanism 2 to release potential energy at this stage and smoothly return to the bottom plane curve segment 31, thereby improving the stability and accuracy of the point-changing process.

[0070] As a preferred embodiment, the screw mechanism 2 in this embodiment includes a gear transmission assembly 21, a pintle member 22 and a sliding assembly 23, wherein the gear transmission assembly 21 is arranged on the frame 1, and the gear transmission assembly 21 has two movable ends arranged opposite to each other, and the two movable ends move synchronously toward each other; the pintle member 22 is fixed on the movable end of the gear transmission assembly 21 close to the cam 3, and the pintle member 22 abuts against the outer side wall of the cam 3; the sliding assembly 23 is arranged on the side of the mounting frame 4 close to the frame 1, and the sliding assembly 23 is arranged perpendicular to the setting direction of the adjacent gear transmission assembly 21, and a sliding part is provided on the sliding assembly 23, and the other movable end of the gear transmission assembly 21 is fixed to the sliding part of the sliding assembly 23.

[0071] It should be noted that when the cam 3 rotates, its outer wall contacts the ejector part 22 and pushes the ejector part 22 to move. Since the ejector part 22 is fixed on the movable end of the gear transmission assembly 21, the movement of the ejector part 22 will drive the two movable ends of the gear transmission assembly 21 to move synchronously toward each other. The movable end on one side controls the horizontal position of the frequency doubling crystal 5 through the sliding assembly 23, while the movable end on the other side pushes or pulls the sliding assembly 23 through the contact between the ejector part 22 and the cam 3, thereby controlling the vertical position of the frequency doubling crystal 5.

[0072] The jack screw mechanism 2 of this embodiment realizes precise control of the frequency doubling crystal 5 in the horizontal and vertical directions through the coordinated work of the gear transmission assembly 21, the jack needle assembly 22 and the sliding assembly 23, which not only improves the accuracy and stability of the point change, but also makes the structure of the entire point change device more compact and efficient.

[0073] Since the structural size of the point-changing frequency-doubling crystal 5 is too small and the cross-sectional width is only 5 mm, theoretically, the movement displacement of the cam 3 and the top screw mechanism 2 will be less than 5 mm. However, the size of the cam 3 is too small and the top screw mechanism 2 has a contact diameter, which will cause the cam 3 structure to be too small and the movement accuracy to be insufficient. At this time, the cam 3 structure needs to be enlarged, and the movement stroke of the cam 3 and the top screw mechanism 2 needs to be proportionally reduced and fed back to the mounting frame 4, thereby improving the structural movement point-changing accuracy.

[0074] As a preferred embodiment, the gear transmission assembly 21 in this embodiment includes two gear sliders 211, a mounting seat 212, a main gear 213 and a sub-gear 214, wherein a window is opened on the side of the frame 1; the two gear sliders 211 are both slidably connected in the window and are not in the same plane, and the gear slider 211 serves as the movable end of the gear transmission assembly 21; the mounting seat 212 is arranged on the frame 1 and is arranged corresponding to the position of the window; the main gear 213 and the sub-gear 214 are both rotatably connected to the inner side of the mounting seat 212 and are respectively arranged corresponding to the positions of the two gear sliders 211, the main gear 213 is meshed with the gear slider 211 on the side close to the cam 3, and the sub-gear 214 is meshed with the other gear slider 211, and the diameter of the main gear 213 is larger than the diameter of the sub-gear 214; the ejector pin 22 is fixed on the gear slider 211 meshed with the main gear 213, and is located on the side away from the mounting frame 4, and abuts against the outer side wall of the cam 3.

[0075] It should be noted that the main gear 213 and the sub-gear 214 are coaxial linked gears, and flat teeth are installed on the gear sliding member 211, which mesh with the main gear 213 and the sub-gear 214 respectively. When the cam 3 moves, it pushes the ejector part 22 to move up and down, and the flat teeth on the ejector part 22 link the main gear 213 to push the sub-gear 214 to rotate. Under the same angular velocity, the sub-gear 214 in the linked gear pair pushes the flat teeth in the gear sliding member 211 to move. When the large and small gears have the same angular velocity, the transmission ratio is used to reduce the movement stroke of the two gear sliding members 211. The mounting frame 4 is pushed to move by moving the large stroke and reducing the stroke, thereby improving the accuracy of motion transmission between the cam and the mounting frame 4.

[0076] When the ejector pin 22 pushes the mounting frame 4 to move, the mounting frame 4 may slide due to the movement of the two-point mounting frame 4, causing the mounting frame 4 to change its posture during the movement.

[0077] As a preferred embodiment, the sliding assembly 23 in this embodiment includes a plurality of ball bearings 231 and a slide seat 232, wherein the mounting frame 4 is in the shape of a broken line, and a plurality of slide grooves 400 are provided on a side of the mounting frame 4 adjacent to the frame body 1, and the shape of the slide grooves 400 is V-shaped; the slide seat 232 is fixed to the gear slide member 211 away from the side of the cam 3; the plurality of ball bearings 231 are movably arranged on the side of the slide seat 232 away from the gear slide member 211, and the plurality of ball bearings 231 are respectively abutted in the corresponding slide grooves 400.

[0078] It should be noted that structural design is performed on the ejector member 22 on the horizontal side and the ejector member 22 on the vertical side. Two ball member 231 structures are provided on the ejector member 22 on the horizontal side. The ball member 231 structures are arranged longitudinally and move in two V-shaped grooves of the mounting frame 4 to ensure that the mounting frame 4 will not deflect in the longitudinal position during the movement of the structure; two ball member 231 structures are designed on the ejector member 22 on the vertical side. The ball member 231 structures are arranged transversely and move in a single V-shaped groove of the mounting frame 4 to ensure that the mounting frame 4 will not deflect in the transverse position during the movement of the structure; the four ball members 231 are used to reduce the friction between the mounting frame 4 and the ejector screw mechanism 2 during the movement, thereby solving the possibility of structural posture deflection of the mounting frame 4 during the movement and ensuring the stability of the overall system during the movement.

[0079] In the further overall structural design, the mounting frame 4 at this time has only the ball member 231 as the connecting part, and it is a soft connection, and the thrust is applied. At this time, the ball member 231 cannot form a stable assembly; and during the rotation of the cam 3, the ejector member 22 lacks the force toward the inside of the cam 3, and the ejector member 22 and the cam 3 may derail during the movement.

[0080] The present embodiment also includes at least two tension spring members 6, which are fixed between the frame 1 and the mounting bracket 4, and the at least two tension spring members 6 are respectively located on the two side surfaces adjacent to the mounting bracket 4 and the frame 1, respectively applying horizontal and vertical forces, so that the ejector member 22 is always in contact with the outer side wall of the cam.

[0081] It should be noted that a tension spring structure is added between the frame 1 and the mounting frame 4, and tension is applied in the horizontal and vertical axis directions to fix the mounting frame 4 structure. The tension spring member 6 has a recovery tendency when in a stretched state, pulling the mounting frame 4 to move inward, and through the conduction of the ejector member 22 and the gear, the gear sliding member 211 always tends to move in the axial direction of the cam 3. At this time, during the rotation of the cam 3, the end face of the ejector member 22 is always in contact with the outer contour of the cam 3, and derailment will not occur.

[0082] This embodiment further includes a driving member 7 , which is fixed outside. The output shaft of the driving member 7 is fixedly connected to the axis of the cam 3 , and the driving member 7 drives the cam 3 to rotate circumferentially in the frame 1 .

[0083] Specifically, the driving member 7 is a driving motor.

[0084] like Figure 7-11 As shown, in a second aspect, the present invention further provides a method for using a cam point changing device, which is implemented using the above-mentioned cam point changing device and includes the following steps:

[0085] S1, when the frequency doubling crystal 5 is at the initial position, one end of its ejector pin 22 abuts against the junction of the rising curve segment 32 and the bottom plane curve segment 31, and one end of the other ejector pin 22 abuts against the junction of the rising curve segment 32 and the high plane curve segment 33;

[0086] S2, the driving member 7 drives the cam 3 to rotate clockwise in the frame 1, and the two ejector members 22 alternately perform linear motion, so that the frequency doubling crystal 5 changes points along the rectangular motion trajectory; the ejector mechanism 2 on the horizontal side shortens the stroke through the corresponding gear transmission assembly 21, so that the frequency doubling crystal 5 moves in the horizontal direction, and the ejector mechanism 2 on the vertical side slides horizontally on the mounting frame 4 through the sliding assembly 23; the ejector mechanism 2 on the vertical side shortens the stroke through the corresponding gear transmission assembly 21, so that the frequency doubling crystal 5 moves in the vertical direction, and the ejector mechanism 2 on the horizontal side slides vertically on the mounting frame 4 through the sliding assembly 23;

[0087] S3, when the cam 3 rotates circumferentially, one end of the ejector member 22 moves along the surface contour of the ascending curve segment 32, and one end of the other ejector member 22 moves along the surface contour of the high plane curve segment 33, so that the frequency doubling crystal 5 moves from the initial position along its longitudinal vertical direction toward the second plane, until one end of the ejector member 22 abuts against the junction of the ascending curve segment 32 and the high plane curve segment 33, and one end of the other ejector member 22 abuts against the junction of the high plane curve segment 33 and the descending curve segment 34, and the position after the movement is used as the initial position of the second plane;

[0088] When the cam 3 rotates circumferentially, one end of the ejector 22 moves along the surface contour of the high plane curve segment 33, and one end of the other ejector 22 moves along the surface contour of the descending curve segment 34, so that the frequency doubling crystal 5 moves from the initial position of the second plane along its horizontal lateral direction until one end of the ejector 22 abuts against the intersection of the high plane curve segment 33 and the descending curve segment 34, and one end of the other ejector 22 abuts against the intersection of the descending curve segment 34 and the bottom plane curve segment 31, and the position after the movement is used as the end position of the second plane;

[0089] The cam 3 rotates circumferentially, one end of the ejector 22 moves along the surface contour of the descending curve segment 34, and one end of the other ejector 22 moves along the surface contour of the bottom plane curve segment 31, so that the frequency doubling crystal 5 moves from the end position of the second plane along its longitudinal vertical direction toward the initial position side, until one end of the ejector 22 abuts against the intersection of the descending curve segment 34 and the bottom plane curve segment 31, and one end of the other ejector 22 abuts against the intersection of the bottom plane curve segment 31 and the ascending curve segment 32. The position after the movement is used as the end position of the first plane.

[0090] The cam 3 rotates circumferentially, one end of the ejector 22 moves along the surface contour of the bottom plane curve segment 31, and one end of the other ejector 22 moves along the surface contour of the rising curve segment 32, so that the frequency doubling crystal 5 moves from the end position of the first plane to the initial position, completing the laser processing of one cycle of the frequency doubling crystal 5;

[0091] The rising curve segment 32 and the falling curve segment 34 make the moving distance of the frequency doubling crystal 5 a whole row of processing points in the longitudinal direction, and the high plane curve segment 33 and the bottom plane curve segment 31 make the moving distance of the frequency doubling crystal 5 a stepping processing point in the transverse direction;

[0092] S4, the cam point changing device is horizontally moved by two step processing points through the external displacement device, and steps S1-S4 are repeated to complete the laser processing of all points of the entire frequency doubling crystal 5.

[0093] Different curve segments of the cam 3 are used to control the movement trajectory of the ejector 22, thereby controlling the movement of the frequency doubling crystal 5 in the horizontal and vertical directions. The gear transmission component 21 and the sliding component 23 work together to achieve precise movement of the frequency doubling crystal 5 in a two-dimensional plane. An external displacement device is used for stepping movement to achieve comprehensive processing of the frequency doubling crystal 5 in the entire processing area, thereby improving the accuracy and stability of the point change of the frequency doubling crystal 5, achieving precise movement and positioning of the frequency doubling crystal 5 in a two-dimensional plane, simplifying the structure of the point change device, and improving processing efficiency. Through the stepping movement of the external displacement device, comprehensive processing of the entire frequency doubling crystal 5 is achieved, and the processing quality and consistency are improved.

[0094] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cam point changing device, characterized in that: It comprises a frame (1), two top screw mechanisms (2), a cam (3), a mounting frame (4) and a frequency doubling crystal (5), wherein: The frame (1) is fixed on the outside and is hollow inside; The two jack screw mechanisms (2) are both slidably connected to the frame (1), and the two jack screw mechanisms (2) are vertically arranged; The cam (3) is located in the frame (1) and can rotate circumferentially relative to the frame (1); One end of the two top screw mechanisms (2) is in contact with the outer side wall of the cam (3), and the other end is slidably connected to the mounting frame (4), and the frequency doubling crystal (5) is arranged on the mounting frame (4); The outer wall of the cam (3) is provided with four sub-segments, the cross-sectional shapes of the four sub-segments are all curved, and the curvatures are all different. The cam (3) rotates in a circumferential direction to slide the top screw mechanism (2), thereby driving the frequency doubling crystal (5) to move and change points in its horizontal and vertical directions.

2. The cam point changing device according to claim 1, characterized in that: The four sub-segments are a bottom plane curve segment (31), an ascending curve segment (32), a high plane curve segment (33) and a descending curve segment (34), wherein the bottom plane curve segment (31), the ascending curve segment (32), the high plane curve segment (33) and the descending curve segment (34) are connected in sequence along the axis of the cam member (3); when the cam (3) rotates circumferentially, one end of the two top screw mechanisms (2) away from the mounting frame (4) abuts against two different and adjacent curve segments of the cam (3), and the circumferential rotation of the cam (3) causes the frequency doubling crystal (5) to change points along a rectangular motion trajectory.

3. The cam point changing device according to claim 2, characterized in that: The bottom plane curve segment (31) and the high plane curve segment (33) are both arc-shaped, and the bottom plane curve segment (31) and the high plane curve segment (33) coincide with the axis of the cam (3), and the radius of the bottom plane curve segment (31) is equal to 1 / 2 of the radius of the high plane curve segment (33).

4. The cam point changing device according to claim 3, characterized in that: The ascending curve segment (32) and the descending curve segment (34) are symmetrically arranged along the central axis of the cam (3), and the cross-sectional shapes of the ascending curve segment (32) and the descending curve segment (34) are both concave at first and convex at the latter.

5. The cam point changing device according to claim 1, characterized in that: The thimble mechanism (2) comprises a gear transmission assembly (21), a thimble member (22) and a sliding assembly (23), wherein: The gear transmission assembly (21) is arranged on the frame (1), and the gear transmission assembly (21) has two movable ends arranged opposite to each other, and the two movable ends move synchronously towards each other; The ejector pin (22) is fixed on the movable end of the gear transmission assembly (21) on the side close to the cam (3), and the ejector pin (22) is in contact with the outer side wall of the cam (3); The sliding assembly (23) is arranged on a side of the mounting frame (4) close to the frame body (1), and the sliding assembly (23) and the adjacent gear transmission assembly (21) are arranged in a vertical direction. The sliding assembly (23) is provided with a sliding part, and the other movable end of the gear transmission assembly (21) is fixed to the sliding part of the sliding assembly (23).

6. The cam point changing device according to claim 5, characterized in that: The gear transmission assembly (21) comprises two gear slides (211), a mounting seat (212), a main gear (213) and a secondary gear (214), wherein: A window is provided on the side of the frame (1); The two gear sliding members (211) are both slidably connected in the window and are not located in the same plane. The gear sliding members (211) serve as the movable ends of the gear transmission assembly (21); The mounting seat (212) is arranged on the frame (1) and is arranged corresponding to the position of the window; The main gear (213) and the sub-gear (214) are both rotatably connected to the inner side of the mounting seat (212) and are respectively arranged corresponding to the positions of the two gear sliding members (211); the main gear (213) is meshed with the gear sliding member (211) on the side close to the cam (3), and the sub-gear (214) is meshed with the other gear sliding member (211); the diameter of the main gear (213) is larger than the diameter of the sub-gear (214); The ejector pin (22) is fixed on a gear sliding member (211) meshing with the main gear (213), is located on a side away from the mounting frame (4), and is in contact with an outer side wall of the cam (3).

7. The cam point changing device according to claim 6, characterized in that: The sliding assembly (23) comprises a plurality of ball bearings (231) and a sliding seat (232), wherein: The mounting frame (4) is in the shape of a broken line, and a plurality of slide grooves (400) are provided on one side of the mounting frame (4) adjacent to the frame body (1), and the shape of the slide grooves (400) is V-shaped; The slide seat (232) is fixed to the gear slide member (211) at a side away from the cam (3); A plurality of ball bearings (231) are movably arranged on a side of the slide seat (232) away from the gear slide member (211), and the plurality of ball bearings (231) are respectively abutted in corresponding slide grooves (400).

8. The cam point changing device according to claim 5, characterized in that: It also includes at least two tension spring components (6), which are fixed between the frame (1) and the mounting frame (4), and the at least two tension spring components (6) are respectively located on two side surfaces adjacent to the mounting frame (4) and the frame (1), respectively applying forces in the horizontal and vertical directions, so that the ejector component (22) always contacts the outer side wall of the cam.

9. The cam point changing device according to claim 1, characterized in that: It also comprises a driving member (7) which is fixed outside, an output shaft of the driving member (7) being fixedly connected to the axis of the cam (3), and the driving member (7) drives the cam (3) to rotate circumferentially within the frame (1).

10. A method for using a cam point changing device, implemented by using the cam point changing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, when the frequency doubling crystal (5) is located at the initial position, one end of its ejector pin (22) abuts against the junction of the rising curve segment (32) and the bottom plane curve segment (31), and one end of the other ejector pin (22) abuts against the junction of the rising curve segment (32) and the high plane curve segment (33); S2, the driving member (7) drives the cam (3) to rotate clockwise in the frame (1), and the two ejector members (22) alternately perform linear motion, so that the frequency doubling crystal (5) changes points along a rectangular motion trajectory; the ejector mechanism (2) on the horizontal side shortens the stroke through the corresponding gear transmission assembly (21), so that the frequency doubling crystal (5) moves in the horizontal direction, and the ejector mechanism (2) on the vertical side slides horizontally on the mounting frame (4) through the sliding assembly (23); the ejector mechanism (2) on the vertical side shortens the stroke through the corresponding gear transmission assembly (21), so that the frequency doubling crystal (5) moves in the vertical direction, and the ejector mechanism (2) on the horizontal side slides vertically on the mounting frame (4) through the sliding assembly (23); S3, when the cam (3) rotates circumferentially, one end of the ejector member (22) moves along the surface contour of the ascending curve segment (32), and one end of the other ejector member (22) moves along the surface contour of the high plane curve segment (33), so that the frequency doubling crystal (5) moves from the initial position along its longitudinal vertical direction toward the second plane, until one end of the ejector member (22) abuts against the intersection of the ascending curve segment (32) and the high plane curve segment (33), and one end of the other ejector member (22) abuts against the intersection of the high plane curve segment (33) and the descending curve segment (34), and the position after the movement is used as the initial position of the second plane; When the cam (3) rotates circumferentially, one end of the ejector pin (22) moves along the surface profile of the high plane curve segment (33), and one end of the other ejector pin (22) moves along the surface profile of the descending curve segment (34), so that the frequency doubling crystal (5) moves from an initial position of the second plane along its horizontal lateral direction until one end of the ejector pin (22) abuts against the intersection of the high plane curve segment (33) and the descending curve segment (34), and one end of the other ejector pin (22) abuts against the intersection of the descending curve segment (34) and the bottom plane curve segment (31), and the position after the movement serves as the end position of the second plane; The cam (3) rotates circumferentially, one end of the ejector member (22) moves along the surface contour of the descending curve segment (34), and one end of the other ejector member (22) moves along the surface contour of the bottom plane curve segment (31), so that the frequency doubling crystal (5) moves from the end position of the second plane along its longitudinal vertical direction toward the initial position side, until one end of the ejector member (22) abuts against the intersection of the descending curve segment (34) and the bottom plane curve segment (31), and one end of the other ejector member (22) abuts against the intersection of the bottom plane curve segment (31) and the ascending curve segment (32), and the position after the movement is used as the end position of the first plane. The cam (3) rotates circumferentially, one end of the ejector pin (22) moves along the surface profile of the bottom plane curve segment (31), and one end of the other ejector pin (22) moves along the surface profile of the rising curve segment (32), so that the frequency doubling crystal (5) moves from the end position of the first plane to the initial position, completing the laser processing of one cycle of the frequency doubling crystal (5); The rising curve segment (32) and the falling curve segment (34) enable the frequency doubling crystal (5) to move a distance equal to a whole row of processing points in the longitudinal direction, and the high plane curve segment (33) and the bottom plane curve segment (31) enable the frequency doubling crystal (5) to move a distance equal to a step processing point in the transverse direction; S4, the cam point changing device is horizontally moved by two step processing points through the external displacement device, and steps S1-S4 are repeated to complete the laser processing of all points of the entire frequency doubling crystal (5).

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