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CN-121983836-A - For CO2Anti-reflection device of laser

CN121983836ACN 121983836 ACN121983836 ACN 121983836ACN-121983836-A

Abstract

The invention relates to the technical field of laser equipment, and discloses an anti-reflection device for a CO 2 laser, which comprises a shell, a polarization beam splitter, a lambda/4 glass slide and a light absorption component, wherein the polarization beam splitter, the lambda/4 glass slide and the light absorption component are arranged in the shell, the light absorption component comprises a mounting frame, a transparent heat conduction seat, a heat conduction plate, a cylinder body and a sliding frame, a V-shaped groove is arranged in the transparent heat conduction seat, the heat conduction plate is arranged on the backlight side of the transparent heat conduction seat, the sliding frame is arranged on the opening end face of the V-shaped groove in a sliding mode, an elastic heat conduction film and a rotary plate capable of being unfolded in a sliding mode are arranged in the sliding frame, light absorption coatings are respectively coated on the inner wall of the V-shaped groove, the surface of the heat conduction plate and the elastic heat conduction film, a piston plate is connected in a sliding mode in the cylinder body, and an air suction pipe communicated with the V-shaped groove is arranged on one side of the piston plate. The invention ensures the light absorption capacity of the light absorption component and maintains the reliability and the long-term running stability of the laser processing system through an automatic triggering compensation mechanism.

Inventors

  • Roman Grishayev
  • LI SHA
  • Vladimir Nizef
  • Gu Kangyan

Assignees

  • 杭州翎贤科技有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (10)

  1. 1. The anti-reflection device for the CO 2 laser is characterized by comprising a shell (2), a polarization beam splitter (21), a lambda/4 glass slide (22) and a light absorption component, wherein the polarization beam splitter (21), the lambda/4 glass slide (22) and the light absorption component are arranged in the shell (2); The light absorption assembly comprises a mounting frame (3), a transparent heat conduction seat (32), a heat conduction plate (33), a cylinder body (31) and a sliding frame (34); a V-shaped groove is formed in the transparent heat conduction seat (32); The heat conducting plate (33) is arranged on the backlight side of the transparent heat conducting seat (32); the sliding frame (34) is arranged on the opening end face of the V-shaped groove in a sliding mode, and an elastic heat conducting film (342) and a rotary plate (341) which can be unfolded in a rotary mode are arranged in the sliding frame (34); the inner wall of the V-shaped groove, the surface of the heat conducting plate (33) and the elastic heat conducting film (342) are all covered with a light absorption coating (37); a piston plate (313) is connected in the cylinder (31) in a sliding way, and an air suction pipe (315) communicated with the V-shaped groove is arranged in the cylinder (31) and positioned at one side of the piston plate (313); The mounting frame (3) is provided with a sliding frame (36) for limiting the sliding frame (34), a clamping frame (35) for limiting the piston plate (313) and an elastic element for driving the sliding frame (34) and the piston plate (313); The light absorption coating on the surface of the heat conduction plate (33) absorbs the transmitted laser and then heats the gas to expand, and the sliding frame (36) and the clamping frame (35) are driven in sequence to release limit.
  2. 2. The anti-reflection device for a CO 2 laser according to claim 1, wherein a sleeve (332) is fixedly installed on one side of the heat conducting plate (33), a heat conducting rod (333) is fixedly installed in the sleeve (332) on the heat conducting plate (33), and a sliding cylinder (334) is slidably connected in the sleeve (332).
  3. 3. The anti-reflection device for the CO 2 laser is characterized in that a fixed rod (343) is fixedly arranged on the sliding frame (34), a rotating rod (321) is rotatably connected to the transparent heat conducting seat (32), a guide groove sleeved on the outer side of the fixed rod (343) is formed in the rotating rod (321), a gear (323) is coaxially fixed at a rotating shaft of the rotating rod (321), an elastic element for driving the sliding frame (34) is a tension spring (322), and the tension spring (322) is connected between one side of the rotating rod (321) and the transparent heat conducting seat (32).
  4. 4. The anti-reflection device for the CO 2 laser according to claim 3, wherein a fifth spring (361) is fixedly connected between the carriage (36) and the mounting frame (3), a trapezoid block (362) is fixedly installed at one end of the carriage (36), and the trapezoid block (362) slides into a tooth slot of the gear (323).
  5. 5. The anti-reflection device for a CO 2 laser according to claim 4, wherein a fixed frame (335) which is in sliding contact with one end of the carriage (36) is fixedly installed on the outer side of the slide cylinder (334).
  6. 6. The anti-reflection device for the CO 2 laser is characterized in that a chute (324) is arranged on the opening end face of the V-shaped groove of the transparent heat conducting seat (32), a sliding seat (344) is vertically and slidably connected in the sliding frame (34), a sliding rod (347) which is slidably matched in the chute (324) is slidably connected in the sliding seat (344), a third spring (348) is fixedly connected between the sliding seat (344) and the sliding rod (347), a second spring (346) is fixedly connected between the sliding seat (344) and the sliding frame (34) in the vertical direction, a rotating sleeve is rotationally connected in the sliding seat (344), a torsion spring (345) is sleeved outside a rotating shaft of the rotating plate (341), one end of the torsion spring (345) is fixedly connected with the rotating plate (341), and the other end of the torsion spring (345) is slidably extended into the rotating sleeve.
  7. 7. The anti-reflection device for a CO 2 laser according to claim 3, wherein a rack (23) is fixed in the housing (2), and the rack (23) is engaged with the gear (323) when the mounting frame (3) is slid into the housing (2) within a set length range.
  8. 8. The anti-reflection device for a CO 2 laser according to claim 2, wherein the elastic element for driving the piston plate (313) is a first spring (312), the first spring (312) is fixedly connected between the piston plate (313) and the inner end surface of the cylinder (31), a clamping groove (314) is formed in the outer side of the piston plate (313), a fourth spring (351) for driving the clamping frame (35) to approach the cylinder (31) is fixedly connected to one side of the clamping frame (35), and one end of the clamping frame (35) slides into the cylinder (31) and extends into the clamping groove (314).
  9. 9. The anti-reflection device for the CO 2 laser is characterized in that a round shaft is fixedly arranged on the outer side of the cylinder body (31), one end of the clamping frame (35) is rotatably connected with a push rod (352), a sliding groove sleeved on the outer side of the round shaft is formed in the push rod (352), and the end portion of the push rod (352) is located on one side of the sliding cylinder (334).
  10. 10. The anti-reflection device for CO 2 laser according to claim 8, wherein a pull rod (311) is fixedly installed at the bottom of the piston plate (313), and the bottom of the pull rod (311) extends to the outside of the cylinder (31).

Description

Anti-reflection device for CO 2 laser Technical Field The invention relates to the technical field of laser equipment, in particular to an anti-reflection device for a CO 2 laser. Background Laser processing is a rapidly growing technology that has been applied to the fields of punching, marking, cutting, welding, heat treatment and various precision machining. Laser technology presents significant advantages, especially in the processing of nonferrous metals and like materials. As a core component of a laser processing system, the state of the art of lasers directly affects the processing quality. Currently, CO 2 lasers are dominant in laser cutting applications due to their excellent performance, however, when the laser beam is irradiated to the surface of a material, especially a high reflectivity metal material, strong reflection occurs. Such reflected light may propagate back along the optical system, potentially causing irreversible damage to the CO 2 laser cavity. Therefore, the problem must be solved when the CO 2 laser is used to process high reflectivity materials. The patent publication No. CN202068081U discloses an anti-reflection device for a CO 2 laser, which comprises a polarization beam splitter, a copper mirror plated with a lambda/4 delay film, a reflecting copper mirror, a focusing mirror and a light absorber, and is characterized in that linear polarized laser output by the CO 2 laser is incident into a lambda/4 wave plate to be circularly polarized after passing through the polarization beam splitter, the laser irradiates a workpiece after focusing, the light reflected from the surface of the workpiece passes through the lambda/4 wave plate again, the polarization direction is rotated by 90 degrees to become linear polarized light perpendicular to the polarization direction of the original emergent light, and the reflected light is deflected when passing through the polarization beam splitter again and is guided to a special light absorber, so that damage caused by the return of the reflected light to the laser is avoided. However, in actual work, the light absorber generally adopts a structure that a light absorbing coating is coated on the surface of a substrate, laser is absorbed to raise the temperature when the light absorbing coating works, and then the light absorbing coating is cooled through the substrate, and is subjected to reciprocating heating and cooling circulation, so that a coating material is easy to crack, foam and even fall off in a large area due to thermal fatigue, once the light absorbing coating falls off, the light absorbing capacity of the light absorbing coating is rapidly reduced or even lost, and reflected laser which is not effectively absorbed can escape, so that the anti-reflection effect is reduced, potential safety hazards can be caused to other components, and the reliability and long-term stable operation of a laser processing system are seriously influenced. Disclosure of Invention The object of the present invention is to provide an anti-reflection device for a CO 2 laser to solve the problems mentioned in the above-mentioned process. In order to achieve the above purpose, the present invention provides the following technical solutions: an anti-reflection device for a CO 2 laser comprises a shell, a polarization beam splitter, a lambda/4 glass slide and a light absorption component, wherein the polarization beam splitter, the lambda/4 glass slide and the light absorption component are arranged in the shell; The light absorption assembly comprises a mounting frame, a transparent heat conduction seat, a heat conduction plate, a cylinder body and a sliding frame; a V-shaped groove is formed in the transparent heat conduction seat; the heat conducting plate is arranged on the backlight side of the transparent heat conducting seat; The sliding frame is arranged on the opening end face of the V-shaped groove in a sliding manner, and an elastic heat conducting film and a rotary plate which can be unfolded in a rotary manner are arranged in the sliding frame; the inner wall of the V-shaped groove, the surface of the heat conducting plate and the elastic heat conducting film are all covered with light absorption coatings; A piston plate is connected in the cylinder in a sliding way, and an air suction pipe communicated with the V-shaped groove is arranged in the cylinder and positioned at one side of the piston plate; The mounting frame is provided with a sliding frame for limiting the sliding frame, a clamping frame for limiting the piston plate and an elastic element for driving the sliding frame and the piston plate; The light absorption coating on the surface of the heat conduction plate absorbs the transmitted laser and then heats the gas to expand, and the carriage and the clamping frame are driven in sequence to release limit. As an optimal scheme of the anti-reflection device for the CO 2 laser, a sleeve is fixedly arranged on one side of the heat c