Micro tube laser processing device and processing technology

Abstract

The present invention belongs to the field of laser processing technology, and specifically relates to a micro-tube laser processing device and processing technology. The device includes: a beam expansion hollow processing device, which is used to process the laser emitted by a laser generator into a beam expansion hollow light beam; a first reflector and a second reflector are arranged opposite to each other and are located on a straight line where the micro-tube is conveyed. The micro-tube passes through the first reflector and the second reflector, and the first reflector reflects the beam expansion hollow light beam vertically directed toward the straight line along the straight line to the second reflector, and the second reflector reflects the beam expansion hollow light beam away from the straight line; the third reflector and the fourth reflector reflect the beam expansion hollow light beam reflected by the second reflector back to the straight line; a focusing mirror, which is used to focus the beam reflected back to the straight line and irradiate it on the surface of the micro-tube; a rotating mechanism, which drives the second reflector, the third reflector, the fourth reflector and the focusing mirror to rotate with the straight line as the axis at the same time, and performs rotation processing on the micro-tube.

Description

Technical Field

[0001] The invention belongs to the technical field of laser processing, and in particular relates to a micro-tube laser processing device and a processing technology. Background Art

[0002] The diameter of micro-tubes is generally less than 4mm and can be used to prepare medical devices such as spinal punctures and catheters.

[0003] The existing micro-tube processing methods have the following disadvantages: the processing range is generally conventional size tubes, and effective production cannot be achieved for capillaries and tubes of special diameters. The equipment compatibility is poor, and processing equipment can only be developed according to demand. The processing accuracy is poor, and even the later polishing requirements cannot be well controlled.

[0004] The prior patent CN113560716A discloses a rotary laser processing device for precision instruments, which uses a rotating bracket as a transfer piece to continuously irradiate the laser emitted by the laser emitting device on the micro-tube clamped by the micro-tube clamp and the micro-tube stretching device in a circular rotation, so as to realize continuous spatial processing of the micro-tube, including axial increment and decrement, spiral processing, and intermittent positioning processing.

[0005] However, in the prior art, the laser is coaxially arranged with the extension direction of the micro-tube, and the micro-tube can only be pre-stored in the hollow tube or guided into the hollow tube by a steering guide wheel, resulting in a limited length of continuous linear processing of the micro-tube, that is, it cannot achieve the theoretical continuous processing along a straight line with unlimited extension, and the overall length of the equipment is also long, occupying a large area. Summary of the invention

[0006] The purpose of the present invention is to provide a micro-tube laser processing device and a processing technology.

[0007] In order to solve the above technical problems, the present invention provides a micro-tube laser processing device, comprising: a beam expansion hollow processing device, used to process the laser emitted by a laser generator into a beam expansion hollow light beam; a first reflector and a second reflector are arranged opposite to each other and are located on a straight line in the conveying direction of the micro-tube, and the micro-tube passes through the first reflector and the second reflector, wherein the first reflector reflects the beam expansion hollow light beam vertically emitted to the straight line along the straight line to the second reflector, and the second reflector reflects the beam expansion hollow light beam away from the straight line; a third reflector and a fourth reflector are arranged to reflect the beam expansion hollow light beam reflected by the second reflector back to the straight line; a focusing mirror, used to focus the beam reflected back to the straight line and irradiate it on the surface of the micro-tube; and a rotating mechanism, used to drive the second reflector, the third reflector, the fourth reflector and the focusing mirror to rotate with the straight line as the axis at the same time, so that the focused laser performs rotation processing on the micro-tube.

[0008] Furthermore, the beam expansion hollow processing device includes: a beam expansion lens for expanding the laser emitted by the laser generator; a collimating lens for collimating the expanded laser; and a shading plate arranged in the center of the light path after beam expansion and collimation to form an expanded hollow light beam.

[0009] Furthermore, the first reflector and the second reflector are both provided with through holes for the micro tubes to pass through, and the through holes are coaxial with the straight line; and the micro tubes pass through the hollow portion of the expanded hollow light beam located between the first reflector and the second reflector.

[0010] Furthermore, the second reflector reflects the expanded hollow light beam away from the straight line in a direction perpendicular to the straight line; and the third reflector and the fourth reflector are arranged opposite to each other and are located on another straight line parallel to the straight line, so as to reflect the expanded hollow light beam reflected by the second reflector toward the microtube in a direction perpendicular to the straight line.

[0011] Furthermore, the expanded hollow light beam is emitted from the third reflector to the fourth reflector in a direction opposite to the direction from the first reflector to the second reflector; and the focused laser beam is irradiated on the micro-tube between the first reflector and the second reflector.

[0012] Furthermore, the second reflector, the third reflector, the fourth reflector and the focusing mirror are all mounted on a rotatable body; and the rotating mechanism drives the rotatable body to rotate around the straight line as an axis.

[0013] In yet another aspect, the present invention further provides a micro-tube laser processing process, comprising: arranging the micro-tubes along a straight line;

[0014] Processing the light beam emitted by the laser generator into an expanded hollow light beam, irradiating the light beam perpendicular to and toward the straight line;

[0015] Reflecting the expanded hollow light beam irradiated on the straight line along the straight line for a certain distance, and then reflecting the expanded hollow light beam vertically away from the straight line;

[0016] Focusing the light beam reflected from the straight line to form a processing light beam;

[0017] The processing light beam is rotated and irradiated on the surface of the micro-tube with the straight line as the axis, so as to perform laser rotation processing on the micro-tube; wherein

[0018] When the expanded hollow light beam is reflected along the straight line for a certain distance, the micro-tube is located in the hollow part of the expanded hollow light beam.

[0019] Furthermore, the micro-tube laser processing process is performed using the micro-tube laser processing device described above.

[0020] The beneficial effects of the present invention are:

[0021] The micro-tube laser processing device and process of the present invention processes the laser emitted by the laser generator into a beam-expanding hollow beam, expands the reflection area of ​​the laser on the reflector and weakens the beam cross-sectional energy. The hollow beam can allow the micro-tube to pass through, and can prevent the laser beam from affecting the micro-tube during the propagation process.

[0022] By rotating the second reflector, the third reflector, the fourth reflector and the focusing mirror with the straight line as the axis at the same time, the micro-tube can be subjected to rotational processing, and the axial displacement of the micro-tube can be used to realize the spatial processing of the micro-tube by the laser;

[0023] The expanded hollow light beam is vertically directed toward the straight line, and the micro-tube passes through the first reflector and the second reflector. The third reflector and the fourth reflector are configured to reflect the expanded hollow light beam reflected by the second reflector back to the straight line, so that the micro-tube can theoretically be infinitely extended along the straight line for continuous processing.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a three-dimensional schematic diagram of a micro-tube laser processing device of the present invention;

[0028] Figure 2 It is a schematic plan view of the micro-tube laser processing device of the present invention.

[0029] In the figure:

[0030] Beam expanding hollow processing device 1, beam expanding hollow light beam 11, beam expanding lens 12, collimating lens 13, shading plate 14;

[0031] A first reflecting mirror 21, a second reflecting mirror 22, a third reflecting mirror 23, a fourth reflecting mirror 24, and a focusing mirror 25;

[0032] Micro tube 3, rotating body 4. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a micro-tube laser processing device, including: a beam expansion hollow processing device 1, used to process the laser emitted by a laser generator into a beam expansion hollow light beam 11; a first reflector 21 and a second reflector 22 arranged opposite to each other, and located on a straight line where the micro-tube 3 is conveyed, and the micro-tube 3 passes through the first reflector 21 and the second reflector 22, wherein the first reflector 21 reflects the beam expansion hollow light beam 11 vertically emitted to the straight line along the straight line to the second reflector 22, and the second reflector 22 reflects the beam expansion hollow light beam 11 away from the straight line; a third reflector 23 and a fourth reflector 24, which are arranged to reflect the beam expansion hollow light beam 11 reflected by the second reflector 22 back to the straight line; a focusing mirror 25, which is used to focus the beam reflected back to the straight line and irradiate it on the surface of the micro-tube 3; and a rotating mechanism, which is used to drive the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 to rotate with the straight line as the axis at the same time, so that the focused laser performs rotation processing on the micro-tube 3.

[0036] In this embodiment, the micro-tube 3 is transported along a straight line and passes through the first reflector 21 and the second reflector 22 which are arranged opposite to each other. After the expanded hollow light beam 11 is irradiated on the first reflector 21, it is emitted to the second reflector 22 along the extension direction of the micro-tube 3, and then irradiated on the micro-tube 3 through the third reflector 23, the fourth reflector 24 and the focusing mirror 25 for processing. The rotating mechanism drives the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 to rotate simultaneously with the straight line as the axis, so that the focused laser performs rotation processing on the micro-tube 3.

[0037] In some application scenarios, in order to achieve laser rotation processing, the laser cannot rotate multiple times due to line limitations. Therefore, this embodiment is designed so that the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 rotate at the same time, that is, the optical path involved in the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 rotates to achieve the purpose of rotation processing.

[0038] In this embodiment, the laser can be arranged on one side of the micro-tube 3 and vertically irradiated toward the micro-tube 3, so that the linear extension and transportation of the micro-tube 3 will not be affected, and linear infinite continuous processing can be achieved in theory.

[0039] In this embodiment, in order to prevent the optical path energy between the first reflector 21 and the second reflector 22 from affecting the micro-tube 3, the laser emitted by the laser generator is processed into an expanded hollow light beam 11, and the micro-tube 3 is located in the hollow part of the expanded hollow light beam 11. The expanded hollow light beam 11 does not contact the micro-tube 3, thereby preventing the micro-tube 3 from being affected during the propagation of the light beam.

[0040] In this embodiment, optionally, the beam expanding hollow processing device 1 includes: a beam expanding lens 12, used to expand the laser emitted by the laser generator; a collimating lens 13, used to collimate the expanded laser; a shading plate 14, arranged in the center of the light path after beam expansion and collimation, to form an expanded hollow light beam 11.

[0041] In this embodiment, optionally, the first reflector 21 and the second reflector 22 are both provided with through holes for the micro tube 3 to pass through, and the through holes are coaxial with the straight line; and the micro tube 3 passes through the hollow part of the expanded hollow light beam 11 located between the first reflector 21 and the second reflector 22.

[0042] In this embodiment, optionally, the second reflector 22 reflects the expanded hollow light beam 11 away from the straight line in a direction perpendicular to the straight line; and the third reflector 23 and the fourth reflector 24 are arranged opposite to each other and are located on another straight line parallel to the straight line, so as to reflect the expanded hollow light beam 11 reflected by the second reflector 22 toward the micro-tube 3 in a direction perpendicular to the straight line.

[0043] like Figure 1 As shown, in this embodiment, preferably, in order to minimize the length of the device along the extension direction of the micro-tube 3, the direction of the expanded hollow light beam 11 from the third reflector 23 to the fourth reflector 24 is opposite to the direction from the first reflector 21 to the second reflector 22; and the focused laser beam is irradiated on the micro-tube 3 located between the first reflector 21 and the second reflector 22.

[0044] In this embodiment, optionally, the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 are all mounted on a rotatable body 4; the rotating mechanism drives the rotatable body 4 to rotate around the straight line as the axis.

[0045] In this embodiment, optionally, the rotating body 4 can be integrally formed or assembled from separate parts; as for how the rotating mechanism drives the rotating body 4 if the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 are all installed on the rotatable body 4, those skilled in the art can use existing technologies to achieve it, which will not be elaborated here.

[0046] In this embodiment, optionally, the rotating mechanism can be a motor or a motor acceleration and reduction box, which is connected to the rotating body 4 through a transmission mechanism. The rotating body 4 can be a bracket for mounting the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25.

[0047] In this embodiment, the micro-tube laser processing device can be optionally applied to surface coating stripping, space cutting, welding process processing, etc. of capillary tubes. It can be used for medical product development and application, and plays a decisive role in the complex process development of medical push rod products.

[0048] In one application scenario, a laser suitable for the workpiece to be processed is selected according to the product characteristics and processing technology, and the laser beam is incident into the beam expander lens 12, the laser light path is expanded and amplified, and the distance between the laser beam and the collimator lens 13 is adjusted to adjust the diameter of the beam. The purpose of this step is to expand the reflection area of ​​the laser on the reflector and weaken the energy of the beam cross section. Then, the center of the laser beam is shielded by the light shielding plate 14, so that the entire reflection light path is a hollow structure. When the laser beam passes through the first reflector 21 and the second reflector 22, a hole is punched at the center of the laser irradiation spot of the first reflector 21 and the second reflector 22, and the hole position is on the same axis. The micro-tube 3 to be processed is coaxially placed in the through hole of the first reflector 21 and the second reflector 22. The laser beam is reflected by the third reflector 23 and the fourth reflector 24 and finally incident on the focusing mirror 25. The distance between the focusing mirror 25 and the micro-tube 3 to be processed can be adjusted so that the focused laser spot is on the surface of the micro-tube 3 to be processed. At this time, the laser optical path mainly composed of the second reflector 22, the third reflector 23, the fourth reflector 24 and the focusing mirror 25 is made to rotate 360° continuously or at a specified step angle around the coaxial through-holes of the first reflector 21 and the second reflector 22. Laser axis surround processing can be achieved, and the micro-tube 3 can be axially displaced in the direction of the rotation axis to achieve laser surround space processing.

[0049] Example 2

[0050] Based on Example 1, this Example 2 provides a micro tube laser processing process, including:

[0051] Arrange the micro tubes 3 along a straight line;

[0052] Processing the light beam emitted by the laser generator into an expanded hollow light beam 11, irradiating perpendicularly to the straight line and toward the straight line;

[0053] After reflecting the expanded hollow light beam 11 irradiated on the straight line for a certain distance along the straight line, the expanded light beam 11 is vertically reflected away from the straight line;

[0054] Focusing the light beam reflected from the straight line to form a processing light beam;

[0055] The processing light beam is rotated and irradiated on the surface of the micro-tube 3 with the straight line as the axis, so as to perform laser rotation processing on the micro-tube 3; wherein

[0056] When the expanded hollow light beam 11 is reflected along the straight line for a distance, the micro-tube 3 is located in the hollow portion of the expanded hollow light beam 11 .

[0057] In this embodiment, optionally, the micro-tube laser processing process can be processed using the micro-tube laser processing device as described in claim 1.

[0058] In summary, the present micro-tube laser processing device and process processes the laser emitted by the laser generator into an expanded hollow light beam, expands the reflection area of ​​the laser on the reflector and weakens the beam cross-sectional energy, the hollow light beam can be passed through by the micro-tube, and the laser beam during propagation can be prevented from affecting the micro-tube; the second reflector, the third reflector, the fourth reflector and the focusing mirror are simultaneously rotated with the straight line as the axis, so that the micro-tube can be subjected to rotational processing, and the axial displacement of the micro-tube can be used to realize the spatial processing of the micro-tube by the laser; the expanded hollow light beam is vertically emitted to the straight line, the micro-tube passes through the first reflector and the second reflector, and the third reflector and the fourth reflector are configured to reflect the expanded hollow light beam reflected by the second reflector back to the straight line, so that the micro-tube can be theoretically infinitely extended along the straight line for continuous processing.

[0059] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0060] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A micro tube laser processing device, characterized in that: include: A beam expansion hollow processing device (1), comprising a light shielding plate (14); used for processing the laser emitted by a laser generator into a beam expansion hollow light beam (11); A first reflector (21) and a second reflector (22) are arranged opposite to each other and are located on a straight line in the conveying direction of the micro-tube (3); the micro-tube (3) passes through the first reflector (21) and the second reflector (22); the first reflector (21) reflects a beam-expanding hollow light beam (11) perpendicularly directed toward the straight line along the straight line to the second reflector (22); the second reflector (22) reflects the beam-expanding hollow light beam (11) away from the straight line; and the micro-tube (3) passes through a hollow portion of the beam-expanding hollow light beam (11) located between the first reflector (21) and the second reflector (22); The third reflector (23) and the fourth reflector (24) are arranged to reflect the expanded hollow light beam (11) reflected by the second reflector (22) back to the straight line; the third reflector (23) and the fourth reflector (24) are arranged opposite to each other and are located on another straight line parallel to the straight line; A focusing mirror (25) is used to focus the expanded hollow light beam (11) reflected back to the straight line and then irradiate it onto the surface of the micro-tube (3) located between the first reflecting mirror (21) and the second reflecting mirror (22); as well as The rotating mechanism is used to drive the second reflecting mirror (22), the third reflecting mirror (23), the fourth reflecting mirror (24) and the focusing mirror (25) to rotate with the straight line as the axis at the same time, so that the focused laser beam can perform rotation processing on the micro tube (3).

2. The micro-tube laser processing device according to claim 1, characterized in that: The beam expansion hollow processing device (1) comprises: A beam expander lens (12) is used to expand the laser beam emitted by the laser generator; A collimating lens (13) is used to collimate the expanded laser light; and The light shielding plate (14) is arranged at the center of the light path after beam expansion and collimation to form a beam expansion hollow light beam (11).

3. The micro-tube laser processing device according to claim 1, characterized in that: The first reflector (21) and the second reflector (22) are both provided with through holes for the micro-tube (3) to pass through, and the through holes are coaxial with the straight line.

4. The micro-tube laser processing device according to claim 1, characterized in that: The second reflector (22) reflects the expanded hollow light beam (11) away from the straight line in a direction perpendicular to the straight line; and The third reflector (23) and the fourth reflector (24) reflect the expanded hollow light beam (11) reflected by the second reflector (22) toward the micro-tube (3) in a direction perpendicular to the straight line.

5. The micro-tube laser processing device according to claim 4, characterized in that: The direction in which the expanded hollow light beam (11) is emitted from the third reflector (23) to the fourth reflector (24) is opposite to the direction in which the expanded hollow light beam (11) is emitted from the first reflector (21) to the second reflector (22).

6. The micro-tube laser processing device according to claim 1, characterized in that: The second reflector (22), the third reflector (23), the fourth reflector (24) and the focusing mirror (25) are all mounted on a rotatable body (4); The rotating mechanism drives the rotatable body (4) to rotate around the straight line as an axis.

7. A micro tube laser processing process, characterized in that: include: Arranging the micro tubes (3) along a straight line; Processing the light beam emitted by the laser generator into an expanded hollow light beam (11), which is perpendicular to the straight line and irradiated toward the straight line; After reflecting the expanded hollow light beam (11) irradiated on the straight line for a certain distance along the straight line, the expanded light beam (11) is vertically reflected away from the straight line; Focusing the light beam reflected from the straight line to form a processing light beam; The processing light beam is rotated and irradiated onto the surface of the micro-tube (3) with the straight line as the axis, so as to perform laser rotation processing on the micro-tube (3); wherein When the expanded hollow light beam (11) is reflected along the straight line for a distance, the micro-tube (3) is located in the hollow part of the expanded hollow light beam (11); the micro-tube laser processing process is performed using the micro-tube laser processing device as described in any one of claims 1 to 6.

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