CN113878228A - Controllable focusing device for inner wall laser processing - Google Patents
Controllable focusing device for inner wall laser processing Download PDFInfo
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- CN113878228A CN113878228A CN202111331006.3A CN202111331006A CN113878228A CN 113878228 A CN113878228 A CN 113878228A CN 202111331006 A CN202111331006 A CN 202111331006A CN 113878228 A CN113878228 A CN 113878228A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a controllable focusing device for inner wall laser processing, which comprises an end protective lens mounting cylinder, a focusing positioning cylinder, a focusing fixing cylinder, a focusing cylinder and a focusing lens bracket, wherein the end protective lens mounting cylinder is arranged on the end protective lens mounting cylinder; one end of the focusing positioning cylinder is connected with the end protective lens mounting cylinder, and the other end of the focusing positioning cylinder is connected with the focusing fixing cylinder; a cavity is formed inside the focusing positioning cylinder and the focusing fixing cylinder, and a focusing mechanism is arranged outside the focusing positioning cylinder; one end of the focusing barrel is arranged in the cavity, and the other end of the focusing barrel is provided with a focusing mirror bracket; the focusing mechanism can drive the focusing barrel to reciprocate in the cavity so as to adjust the distance between the focusing lens and the reflector on the focusing lens frame. The device has solved the problem that focus was difficult to be adjusted among the prior art inner wall laser beam machining device.
Description
Technical Field
The invention relates to the field of laser processing, in particular to a controllable focusing device for inner wall laser processing.
Background
The inner wall of a metal product is processed in various manners, such as turning by a lathe, and in addition to the foregoing manners, laser processing is also a very common processing manner, such as processing the inner wall of a cylinder liner by laser. In the laser processing process, the focal length is adjusted, and the focal length of the laser in the existing laser processing device is fixed. If a certain device can only process the inner wall of the engine cylinder sleeve with the inner diameter of 80mm, and the inner walls of the engine cylinder sleeves with other inner diameters are processed, other devices are needed to be used for processing. Therefore, a plurality of devices for laser processing the inner wall are required to be produced aiming at different metal products, so that the production cost and the production efficiency are difficult to improve.
Disclosure of Invention
The invention aims to provide a controllable focusing device for inner wall laser processing, which aims to solve the problem that the focal length in an inner wall laser processing device in the prior art is difficult to adjust.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a controllable focusing device for inner wall laser processing comprises an end protective lens mounting cylinder, a focusing positioning cylinder, a focusing fixing cylinder, a focusing cylinder and a focusing lens frame; one end of the focusing positioning cylinder is connected with the end protective lens mounting cylinder, and the other end of the focusing positioning cylinder is connected with the focusing fixing cylinder; a cavity is formed inside the focusing positioning cylinder and the focusing fixing cylinder, and a focusing mechanism is arranged outside the focusing positioning cylinder; one end of the focusing barrel is arranged in the cavity, and the other end of the focusing barrel is provided with a focusing mirror bracket; the focusing mechanism can drive the focusing barrel to reciprocate in the cavity so as to adjust the distance between the focusing lens and the reflector on the focusing lens frame.
As a preferred scheme of the present invention, the focusing mechanism includes a driving unit, a driving screw and a shift lever, a sliding slot is disposed on a side wall of the focusing positioning cylinder, and the driving screw is connected to the driving unit; one end of the deflector rod is arranged on the driving screw rod, and the other end of the deflector rod penetrates through the sliding groove to be connected with one end of the focusing barrel; the driving unit can drive the driving screw rod to rotate, so that the shifting lever can slide along the sliding groove.
As a preferable aspect of the present invention, the driving unit is a focusing stepping motor, the focusing stepping motor is electrically connected to a rotary encoder, a pulse signal generated by the rotary encoder can drive the driving screw to move, a rotation angle of the rotary encoder can be converted into the number of pulses to control a stroke of the driving screw, and a rotation direction of the rotary encoder can control a movement direction of the driving screw.
As a preferable scheme of the present invention, the driving screw is screwed to a motor output shaft of the focusing stepping motor.
As a preferred scheme of the present invention, the shift lever is provided with a threaded hole, and the shift lever is sleeved on the driving screw rod.
As a preferred scheme of the present invention, the controllable focusing device further includes a shift lever limiting mechanism, and the shift lever limiting mechanism can limit a stroke range of the shift lever.
As a preferred scheme of the invention, the shifting lever limiting mechanism comprises an anti-collision left limiting switch and an anti-collision right limiting switch, the anti-collision left limiting switch and the anti-collision right limiting switch are arranged on the outer side wall of the focusing and positioning cylinder at intervals, and the stroke range of the shifting lever is positioned between the anti-collision left limiting switch and the anti-collision right limiting switch.
As a preferable scheme of the present invention, the anti-collision left limit switch and the anti-collision right limit switch are each independently an infrared switch or a tact switch.
As a preferred scheme of the invention, the deflector rod limiting mechanism further comprises a limiting slider fixing strip, the limiting slider fixing strip is arranged on the outer side wall of the focusing positioning cylinder, and the anti-collision left limiting switch and the anti-collision right limiting switch are arranged on the limiting slider fixing strip.
As a preferable scheme of the invention, the positions of the anti-collision left limit switch and the anti-collision right limit switch on the limit sliding block fixing strip are adjustable.
As a preferable scheme of the present invention, an outer lens barrel having a length greater than that of the focusing barrel is sleeved on a barrel body of the focusing barrel, one end of the outer lens barrel is sleeved on the focusing fixed barrel, a diameter-variable light-shielding ring is arranged on an inner wall of the outer lens barrel close to the other end of the focusing lens holder, and the diameter of the light-shielding ring can change along with the axial movement of the focusing adjusting barrel along the focusing fixed barrel.
As a preferred scheme of the present invention, the outer lens barrel is rotatably sleeved on the focusing fixed barrel through a proportional transmission device mounted on the focusing fixed barrel, and the proportional transmission device is connected with the driving lead screw;
the proportional transmission device comprises a plurality of sections of threaded shafts movably sleeved at the end parts of driving screws, wherein the surfaces of the sections of threaded shafts are provided with two sections of threads with different pitches, the end surface of the section of threaded shaft, which is close to the driving screws, is provided with bolts for fixing the sections of threaded shafts and the sleeving positions between the driving screws, and the outer lens cone is connected to the end surface of the focusing fixing cylinder and is provided with threads matched with the sections of threaded shafts.
As a preferable scheme of the present invention, the light-shielding ring includes a plurality of annular array flap plates, an aperture through which laser passes is formed in the middle of the annular array flap plates, and the flap plates are hinged to the inner wall of the outer barrel.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the focusing mechanism is arranged outside the focusing positioning cylinder, and the focusing cylinder can reciprocate in the cavity through the focusing mechanism, so that the adjustment of the distance between the focusing lens and the reflector on the focusing lens frame is realized, namely the adjustment of the focal length of laser is realized, and therefore, the accurate focusing and inner wall processing of metal products (such as cylinder liners) with different inner diameters on the same equipment can be realized through the same controllable focusing device; the device can work in a positive focus or negative focus (defocusing) state during processing to achieve the required roughness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic structural diagram of a preferred embodiment of a controllable focusing device for laser processing of an inner wall according to the present invention;
FIG. 2 is a perspective view of FIG. 1 provided with the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
fig. 4 is a structural view of fig. 1 provided with an outer barrel;
fig. 5 is a plan view of the light-shielding ring.
The reference numerals in the drawings denote the following, respectively:
1-a drive unit; 2-driving a screw rod; 3-anti-collision left limit switch; 4-anti-collision right limit switch; 5-limiting the slide block fixing strip; 6-a focusing barrel; 7-a focusing frame; 8-a focus positioning cylinder; 9-a focusing fixed cylinder; 10-an end protective mirror mounting cylinder; 11-a deflector rod; 12-a motor output shaft; 13-a mirror; 14-an outer barrel; 15-shading ring; 16-flap plate; 17-a multi-segment threaded shaft; 18-bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a controllable focusing device for inner wall laser processing, which comprises an end protective lens mounting cylinder 10, a focusing positioning cylinder 8, a focusing fixing cylinder 9, a focusing cylinder 6 and a focusing lens frame 7, wherein the end protective lens mounting cylinder 10 is connected with the focusing positioning cylinder 8 through a connecting rod; one end of the focusing positioning cylinder 8 is connected with the end protective lens mounting cylinder 10, and the other end is connected with the focusing fixing cylinder 9; a cavity is formed inside the focusing positioning cylinder 8 and the focusing fixing cylinder 9, and a focusing mechanism is arranged outside the focusing positioning cylinder 8; one end of the focusing barrel 6 is arranged in the cavity, and the other end is provided with a focusing lens frame 7; the focusing mechanism can drive the focusing barrel 6 to reciprocate in the cavity so as to adjust the distance between the focusing lens and the reflector 13 on the focusing lens frame 7.
In the above embodiment, the structure of the focusing mechanism is not particularly limited, but in order to facilitate the sensitive adjustment of the distance between the focusing mirror and the reflective mirror 13, it is preferable that the focusing mechanism includes a driving unit 1, a driving screw 2 and a shift lever 11, a sliding groove is formed on the side wall of the focusing positioning cylinder 8, and the driving screw 2 is connected to the driving unit 1; one end of the deflector rod 11 is arranged on the driving screw rod 2, and the other end of the deflector rod passes through the sliding groove to be connected with one end of the focusing barrel 6; the driving unit 1 can drive the driving screw rod 2 to rotate, so that the shift lever 11 can slide along the sliding groove.
Therefore, as long as the driving unit 1 is started, the driving screw rod 2 can be driven to rotate, the position of the driving lever 11 on the sliding groove is driven, the driving lever 11 slides in the sliding groove and then drives the focusing barrel 6 to move back and forth, the distance between the focusing lens and the reflecting mirror 13 can be accurately adjusted, and therefore inner wall processing can be carried out on metal products with different sizes.
In the above embodiment, in order to further improve the adjustment accuracy, it is preferable that the driving unit 1 is a focus stepping motor electrically connected to a rotary encoder, the rotary encoder generates a pulse signal to drive the driving screw 2 to move, a rotation angle of the rotary encoder is converted into a number of pulses to control a stroke of the driving screw 2, and a rotation direction of the rotary encoder controls a moving direction of the driving screw 2. Therefore, the rotation direction and the stroke of the driving screw rod 2 are accurately controlled through the rotation angle and the rotation direction of the rotary encoder, and the focusing precision is improved. The rotation angle and the rotation direction of the rotary encoder can be converted into pulse signals through a circuit control board, and then the work of the focusing stepping motor is controlled.
In the present invention, the fixing manner of the driving screw 2 can be selected in a wide range, but in order to facilitate the mounting and dismounting of the driving screw 2, it is preferable that the driving screw 2 is screwed to the motor output shaft 12 of the focusing stepping motor.
Similarly, the fixing manner of the shift lever 11 is not specifically limited, but for facilitating the installation and the removal of the shift lever 11, preferably, a threaded hole is formed in the shift lever 11, and the shift lever 11 is sleeved on the driving screw rod 2. Therefore, the driving screw 2 rotates to realize the forward or backward movement of the shift lever 11 along the driving screw 2.
In the present invention, in order to prevent the shift lever 11 from moving forward or backward excessively, it is preferable that the focus control device further includes a shift lever limiting mechanism capable of limiting a stroke range of the shift lever 11. Therefore, the maximum movable range of the shifting lever 11 is limited through the shifting lever limiting mechanism, and the limiting effect is further achieved.
In the above embodiment, the structure of the shift lever limiting mechanism is not particularly limited, but in order to further efficiently limit the stroke of the shift lever 11, it is preferable that the shift lever limiting mechanism includes a left bump limit switch 3 and a right bump limit switch 4, the left bump limit switch 3 and the right bump limit switch 4 are spaced apart from each other on the outer side wall of the focus positioning cylinder 8, and the stroke range of the shift lever 11 is located between the left bump limit switch 3 and the right bump limit switch 4. From this, through the setting of crashproof left limit switch 3 and crashproof right limit switch 4 alright reach spacing effect.
The specific types of the anti-collision left limit switch 3 and the anti-collision right limit switch 4 are not particularly limited, and preferably, the anti-collision left limit switch 3 and the anti-collision right limit switch 4 are respectively and independently an infrared switch (a micro switch) or a tact switch. No matter the infrared switch or the tact switch is adopted, as long as the switch collects the position signal of the shift lever 11 and transmits the position signal to the circuit control board, the circuit control board indirectly controls the working state of the focusing stepping motor according to the position signal, and therefore the purpose of controlling the stroke of the shift lever 11 is achieved.
In the above embodiment, the installation manner of the left bump limit switch 3 and the right bump limit switch 4 is not specifically limited, but in order to further facilitate the installation and the removal of the left bump limit switch 3 and the right bump limit switch 4, preferably, the shift lever limiting mechanism further includes a limiting slider fixing strip 5, the limiting slider fixing strip 5 is disposed on the outer side wall of the focusing positioning barrel 8, and the left bump limit switch 3 and the right bump limit switch 4 are disposed on the limiting slider fixing strip 5.
In addition, because of different sizes of metal products, the stroke of the shift lever 11 is different, and in order to adjust the stroke of the shift lever 11, the positions of the left bump limit switch 3 and the right bump limit switch 4 on the limit slider fixing strip 5 are preferably adjustable. Therefore, the stroke of the shift lever 11 can be adjusted by quickly adjusting the positions of the left anti-collision limit switch 3 and the right anti-collision limit switch 4 on the limit slider fixing strip 5.
Wherein, for the convenience of crashproof left limit switch 3 and crashproof right limit switch 4's position control, preferably, crashproof left limit switch 3 and crashproof right limit switch 4's bottom all is provided with the draw-in groove, the draw-in groove card is located on the spacing slider fixed strip 5 and fixed through mounting (like the bolt) crashproof left limit switch 3 and crashproof right limit switch 4.
Furthermore, in the process of adjusting the focal length, the main modes include rotary focusing and electric focusing, which mainly change the distance between the focusing lens and the reflective mirror, and in the process, due to mechanical assembly errors (a focusing positioning barrel and a focusing barrel, and mechanical abrasion in the subsequent use process), the connection of an incident lens and a focusing lens of the device and the circumferential structure of the inclined surface of the reflective mirror, large focusing errors are easily caused in the processes of rotary focusing and electric focusing, and when the reflective mirror is fixedly installed, the focusing of the focusing lens is required to be performed, and a repeated adjustment process exists, therefore, the invention further provides a structure for improving the focusing efficiency by driving the lead screw to drive the lead screw to perform proportional rotary adjustment by using the driving unit;
as shown in fig. 4 and 5, the method specifically includes:
an outer lens cone 14, one end of the outer lens cone 14 is sleeved on the focusing fixing cylinder 9, and the outer lens cone 14 is sleeved on the focusing fixing cylinder 9 through a proportional transmission device installed on the focusing fixing cylinder 9, the proportional transmission device is connected with the driving lead screw 2, and when the driving unit 1 drives the driving lead screw 2 to move, the proportional transmission device drives the outer lens cone 14 to rotate, wherein the inner wall of the end part of the outer lens cone 14 close to the focusing lens frame 7 is provided with a shading ring 15, the shading ring 15 is formed by connecting a plurality of annular arrays of lamella plates 16 on the inner wall of the outer lens cone 14, an unthreaded hole for a laser light path to pass through is formed in the middle of the annular arrays of lamella plates 16, and the diameter change of the shading ring 15 is mainly the diameter change of the unthreaded hole, wherein the lamella plates 16 are hinged with the inner wall of the outer lens cone 14, the plurality of lamella plates 16 are connected in sequence and have overlapped parts, a guide groove or a guide projection for the next lamella plate 16 to move is arranged on the previous lamella plate 16, the guide groove or the guide protrusion is arc-shaped, and the diameter of the shading ring 15 is changed by the movement of two adjacent flap plates 16 along the guide groove or the guide protrusion.
In the initial position where the focusing lens holder 7 is not adjusted, the position of the focusing lens holder 7 is kept consistent with the position of the light-shielding ring 15, and the circumferential surface of the focusing lens holder 7 is in contact with the circumferential inner surface of the light-shielding ring, so that the diameter of the light-shielding ring 15 is in a maximum state consistent with the inner diameter of the outer barrel 14, and the overlapping part between two adjacent flap plates 16 is in a minimum state.
When the driving unit 1 drives the driving screw rod 2 to move the focusing barrel 6 in the cavity (towards the focusing fixed barrel), the focusing lens frame 7 is driven to move, the relative position of the circumferential surface of the focusing lens frame 7 and the circumferential inner surface of the shading ring along the axial direction of the focusing barrel 6 is changed, at the moment, the contact position of the end edge of the focusing lens frame 7 and the petal plates 16 is changed, and each petal plate 16 rotates at the hinged position.
Further, proportional transmission includes that the activity suit is at the multistage threaded shaft 17 of drive lead screw tip, and multistage threaded shaft 17 surface promptly includes the axis body of two sections screw threads that set gradually and the pitch is different, multistage threaded shaft 17 is provided with the bolt 18 that is used for fixed multistage threaded shaft 17 and drive lead screw 2 to cup joint the position near the tip surface of drive lead screw 2, and wherein, the tip surface that outer lens cone 14 is connected to focus stationary cylinder 7 is provided with the screw thread with multistage threaded shaft 17 matched with.
Wherein, the screw thread on the multi-segment screw shaft 17 is positioned between two matched screw threads on the surface of the outer lens cone 14, the screw thread on the multi-segment screw shaft 17 is engaged with the screw thread on the outer lens cone 14 by changing the sleeve joint position of the multi-segment screw shaft 17 and the driving screw rod 2, so as to realize the adjustment of the rotation process of the outer lens cone 14 through the proportional transmission device, further to ensure that the shading ring 15 can obtain different proportional transmission with the focusing cylinder 6 according to different adjustment proportions (namely the speed of the diameter change of the shading ring 15 following the axial movement of the focusing cylinder 6), and the speed of the shading ring following the diameter change of the focusing cylinder 6 is embodied, further to obtain the radial constraint and guide of the light path through the shading ring 15 formed by the flap plate 16 when the focusing cylinder 6 is adjusted, and to shield the halo in the light path transmission process, the efficiency of effective focusing can be improved.
Wherein, the lobe plate can also be a transparent medium which can refract light.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (12)
1. The utility model provides a controllable focusing device for inner wall laser beam machining which characterized in that: the controllable focusing device comprises an end protective lens mounting cylinder (10), a focusing positioning cylinder (8), a focusing fixing cylinder (9), a focusing cylinder (6) and a focusing lens frame (7); one end of the focusing positioning cylinder (8) is connected with the end protective lens mounting cylinder (10), and the other end of the focusing positioning cylinder is connected with the focusing fixing cylinder (9); a cavity is formed inside the focusing positioning cylinder (8) and the focusing fixing cylinder (9), and a focusing mechanism is arranged outside the focusing positioning cylinder (8); one end of the focusing barrel (6) is arranged in the cavity, and the other end is provided with a focusing mirror bracket (7); the focusing mechanism can drive the focusing barrel (6) to reciprocate in the cavity so as to adjust the distance between a focusing lens and a reflector (13) on the focusing lens frame (7).
2. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 1, wherein: the focusing mechanism comprises a driving unit (1), a driving screw rod (2) and a shifting lever (11), a sliding groove is formed in the side wall of the focusing positioning cylinder (8), and the driving screw rod (2) is connected to the driving unit (1); one end of the deflector rod (11) is arranged on the driving screw rod (2), and the other end of the deflector rod penetrates through the sliding groove to be connected with one end of the focusing barrel (6); the driving unit (1) can drive the driving screw rod (2) to rotate, so that the shifting lever (11) can slide along the sliding groove.
3. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 2, wherein: the driving unit (1) is a focusing stepping motor, the focusing stepping motor is electrically connected with a rotary encoder, pulse signals generated by the rotary encoder can drive the driving screw rod (2) to move, the rotating angle of the rotary encoder can be converted into the number of pulses to control the stroke of the driving screw rod (2), and the rotating direction of the rotary encoder can control the moving direction of the driving screw rod (2).
4. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 3, wherein: and the driving screw rod (2) is in threaded connection with a motor output shaft (12) of the focusing stepping motor.
5. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 3, wherein: the driving rod (11) is provided with a threaded hole, and the driving rod (11) is sleeved on the driving screw rod (2).
6. A controllable focusing mechanism for laser machining of internal walls according to any of claims 1 to 5, characterized by: the controllable focusing device further comprises a driving lever limiting mechanism, the driving lever limiting mechanism can limit the stroke range of the driving lever (11), the driving lever limiting mechanism comprises a left anti-collision limiting switch (3) and a right anti-collision limiting switch (4), the left anti-collision limiting switch (3) and the right anti-collision limiting switch (4) are arranged on the outer side wall of the focusing positioning cylinder (8) at intervals, and the stroke range of the driving lever (11) is located between the left anti-collision limiting switch (3) and the right anti-collision limiting switch (4).
7. A controllable focusing mechanism for laser machining of internal walls according to claim 6, wherein: the anti-collision left limit switch (3) and the anti-collision right limit switch (4) are respectively an infrared switch or a touch switch.
8. A controllable focusing mechanism for laser machining of internal walls as claimed in claim 7, wherein: the driving lever limiting mechanism further comprises a limiting slider fixing strip (5), the limiting slider fixing strip (5) is arranged on the outer side wall of the focusing positioning barrel (8), and the anti-collision left limiting switch (3) and the anti-collision right limiting switch (4) are arranged on the limiting slider fixing strip (5).
9. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 8, wherein: the position of the anti-collision left limit switch (3) and the position of the anti-collision right limit switch (4) on the limit slide block fixing strip (5) are adjustable.
10. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 1, wherein: the lens barrel is characterized in that an outer lens barrel (14) of the focusing barrel (6) is sleeved with the focusing barrel (6), the length of the outer lens barrel (14) is larger than that of the focusing barrel (6), one end of the outer lens barrel (14) is sleeved on the focusing fixing barrel (9), the outer lens barrel (14) is close to the inner wall of the other end of the focusing lens frame (7), a reducing shading ring (15) is arranged on the inner wall of the other end of the focusing lens frame (7), and the shading ring (15) can follow the focusing adjusting barrel (6) to move axially to change the diameter of the focusing fixing barrel (9).
11. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 10, wherein: the outer lens cone (14) is rotatably sleeved on the focusing fixed cylinder (9) through a proportional transmission device arranged on the focusing fixed cylinder (9), and the proportional transmission device is connected with the driving lead screw (2);
proportion transmission is including activity suit multistage threaded shaft (17) at drive lead screw (2) tip, the surface of multistage threaded shaft (17) is provided with the different screw thread of two sections pitches, multistage threaded shaft (17) are close to the tip surface of drive lead screw (2) and are provided with and are used for fixing multistage threaded shaft (17) with bolt (18) of the position of cup jointing between drive lead screw (2), outer lens cone (14) are connected to the tip surface of the fixed section of thick bamboo of focus (7) be provided with multistage threaded shaft (17) matched with screw thread.
12. A controllable focusing mechanism for laser machining of an interior wall as claimed in claim 10, wherein: the shading ring (15) comprises a plurality of annular array flap plates (16), an unthreaded hole for laser to pass through is formed in the middle of the annular array flap plates (16), and the flap plates (16) are hinged to the inner wall of the outer lens cone (14).
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| CN202111331006.3A CN113878228B (en) | 2021-11-11 | 2021-11-11 | Controllable focusing device for inner wall laser processing |
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| CN202111331006.3A CN113878228B (en) | 2021-11-11 | 2021-11-11 | Controllable focusing device for inner wall laser processing |
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| CN113878228B CN113878228B (en) | 2022-12-09 |
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