CN115121943A - Oblique incidence laser shock-enhanced light spot dynamic shape correcting device, system and method - Google Patents
Oblique incidence laser shock-enhanced light spot dynamic shape correcting device, system and method Download PDFInfo
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- CN115121943A CN115121943A CN202210665718.7A CN202210665718A CN115121943A CN 115121943 A CN115121943 A CN 115121943A CN 202210665718 A CN202210665718 A CN 202210665718A CN 115121943 A CN115121943 A CN 115121943A
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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
- B23K26/073—Shaping the laser spot
- B23K26/0736—Shaping the laser spot into an oval shape, e.g. elliptic shape
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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
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/356—Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
Abstract
The invention provides a light spot dynamic shape righting device, a system and a method for oblique incidence laser shock strengthening, wherein the device comprises: a base; the light beam shaping assembly is arranged on one side of the base and used for receiving the light beam and generating a circular parallel light beam; the light beam reshaping component is arranged on the base and used for compressing the round parallel light beams into oval parallel light beams, and comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, wherein the plano-convex cylindrical lens unit is arranged on the light emergent side of the light beam reshaping component, and the plano-concave cylindrical lens unit is arranged on the light emergent side of the plano-convex cylindrical lens unit; and the light beam focusing assembly is arranged on the light emergent side of the plano-concave cylindrical lens unit. The light beam reshaping component is used for reshaping the circular light beam into an elliptical parallel light beam, and the elliptical parallel light beam generates a circular light spot on the surface of the part during oblique incidence laser shock strengthening, so that the strengthening effect is ensured.
Description
Technical Field
The invention relates to the technical field of laser shock peening, in particular to a light spot dynamic shape righting device, system and method for oblique incidence laser shock peening.
Background
Laser Shock Processing (LSP) is characterized in that a GW/cm 2-level high-power density and nanosecond-level short-pulse-width strong Laser is utilized to irradiate the surface of a material, an absorption protective layer coated on the surface of the material absorbs Laser energy to generate explosive gasification evaporation, a high-temperature (more than 10000 ℃) plasma is formed, the plasma continuously absorbs the Laser energy to rapidly expand, a high-pressure (more than 1GPa) Shock wave propagating towards the interior of the material is formed under the constraint action of water flow, the material is subjected to severe plastic deformation under the action of the high-pressure Shock wave to form residual stress, a microstructure is changed, and therefore the fatigue performance, abrasion, stress corrosion and other performances of the material are improved.
The fatigue danger area of aircraft structure spare is usually in the root R department of frame, roof beam, wall, and this region exists shelters from, and open the field condition is limited, when carrying out laser shock strengthening and handling, and laser incident direction can't guarantee to be unanimous with the normal line of part reinforcing face, can produce the facula distortion this moment, forms oval impact spot, and when oblique incident angle was too big, the facula distortion was serious, and the reinforcing effect reduces. In addition, due to occlusion and the like, the processing of the region to be reinforced cannot be performed at the same incident angle, and the degree of distortion of impact spots in the reinforced region is different, so that it is difficult to form a uniform residual compressive stress field, thereby reducing the gain effect of fatigue performance after reinforcement.
At present, aiming at the problem of reduction of the strengthening effect caused by the spot distortion change of large-angle oblique incidence laser shock strengthening, an energy compensation mode is adopted in the prior art to ensure the strengthening effect, namely, the power density attenuation change caused by spot distortion is calculated, and then the size of input energy is changed to ensure the consistency of the power density acting on the metal surface, so that the consistency of the strengthening effect is realized. The method needs larger redundancy of the laser energy of the equipment, and when the laser shock strengthening treatment is carried out on the aircraft structural part, in order to improve the processing efficiency, a large-energy large-light-spot mode is generally adopted for implementation, the redundancy of the laser energy of the equipment is smaller, and effective compensation is difficult to realize; in addition, the existing research shows that under the same laser power density, the size and the shape of a light spot can influence the distribution of the residual stress field, the consistency of the laser power density under different oblique incidence conditions is realized only by an energy compensation mode, and the uniformity of the residual stress field cannot be controlled.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a device, a system and a method for dynamically reshaping a light spot by oblique incidence laser shock peening. And further, the dynamic adjustment of the light spot in the oblique incidence laser shock strengthening process is realized at least to a certain extent, and the roundness of the light spot and the strengthening processing effect are ensured.
In order to achieve the above and other objects, the present invention adopts the following technical solutions.
Optionally, there is provided a dynamic spot reshaping device for oblique incidence laser shock peening, the device comprising:
a base;
the light beam shaping assembly is arranged on one side of the base and used for receiving the light beam and generating a circular parallel light beam;
the light beam reshaping component is arranged on the base and used for compressing the round parallel light beams into oval parallel light beams, and comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, wherein the plano-convex cylindrical lens unit is arranged on the light emergent side of the light beam reshaping component, and the plano-concave cylindrical lens unit is arranged on the light emergent side of the plano-convex cylindrical lens unit; and
and the light beam focusing assembly is arranged on the light emergent side of the plano-concave cylindrical lens unit.
Optionally, the plano-convex cylindrical lens cell includes:
the first bracket is arranged at one end, close to the light beam shaping assembly, of the base;
and the convex surface of the plano-convex cylindrical lens faces the light-emitting side of the light beam shaping component and is used for continuously compressing the circular parallel light beams into elliptical light beams.
Optionally, the plano-convex cylindrical lens cell further includes:
the first driving part is installed on the first support, and the output end of the first driving part is connected with the plano-convex cylindrical lens and used for controlling the plano-convex cylindrical lens to rotate around the direction perpendicular to the axis of the plano-convex cylindrical lens.
Optionally, the plano-concave cylindrical lens cell includes:
the second bracket is arranged at one end, close to the light beam focusing assembly, of the base;
and the plane of the plano-concave cylindrical lens faces to the light outlet side of the plano-convex cylindrical lens unit and is used for generating the elliptical parallel light beams.
Optionally, the plano-concave cylindrical lens cell further includes:
and the output end of the second driving part is connected with the plano-concave cylindrical lens and is used for controlling the plano-concave cylindrical lens to rotate around the direction vertical to the axis of the plano-concave cylindrical lens.
Optionally, the plano-concave cylindrical lens cell further includes:
the sliding part comprises a sliding rail and a sliding platform, the sliding rail is arranged at one end, close to the light beam focusing assembly, of the base, and the sliding platform is connected with the sliding rail in a sliding mode;
the second support is mounted on the sliding platform and used for sliding on the sliding rail along with the sliding platform so as to be close to or far away from the plano-convex cylindrical lens unit.
Optionally, the plano-concave cylindrical lens cell further includes:
and the output end of the third driving part is connected with the sliding platform and used for controlling the sliding platform to slide on the sliding rail to be far away from or close to the plano-convex cylindrical lens unit.
Optionally, there is provided a light spot dynamic reshaping system of the oblique incidence laser shock peening light spot dynamic reshaping device, the light spot dynamic reshaping system comprising:
the light spot dynamic shape righting device is used for compressing the light beam into an elliptical parallel light beam through the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit;
and the control module is electrically connected with the light spot dynamic reshaping device and is used for regulating and controlling the angles of lenses in the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the reshaping direction of the elliptic parallel light beams and the distance between the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the reshaping degree of the elliptic parallel light beams.
Optionally, there is provided a method for dynamically reshaping a light spot by using the oblique incidence laser shock peening light spot dynamic reshaping device of any one of the above, including:
acquiring structural characteristics of a region to be strengthened of a part and a preset angle of oblique incidence of a light beam;
performing strengthening processing path calculation on the structural characteristics and the light beam oblique incidence preset angle to obtain a preset strengthening processing path;
adjusting the beam reshaping component according to the preset strengthening processing path to compress the round parallel beams generated by the beam reshaping component into elliptical parallel beams;
the light beam reshaping component comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, the plano-convex cylindrical lens unit is arranged on the light emitting side of the light beam reshaping component, and the plano-concave cylindrical lens unit is arranged on the light emitting side of the plano-convex cylindrical lens unit.
Optionally, adjusting the beam reshaping component according to the preset strengthening processing path, including:
and adjusting the same rotation angle of the lenses in the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit according to the preset strengthening processing path, and adjusting the distance between the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit within a preset distance threshold range.
As described above, the invention provides a light spot dynamic shape righting device for oblique incidence laser shock strengthening, wherein a light beam shaping component receives a circular laser beam emitted by a light source part, and generates a circular parallel light beam after shaping adjustment; the circular parallel light beams are continuously compressed into elliptical light beams after passing through the plano-convex cylindrical lens unit, and the elliptical light beams generate elliptical parallel light beams after passing through the plano-concave cylindrical lens unit; the light beam focusing assembly receives the elliptical parallel light beam and focuses the elliptical parallel light beam to generate the elliptical parallel light beam with high power density. After the elliptical parallel light beam with high power density is elongated on the intersection line of the light beam incidence surface and the surface of the part, the impact light spot trace is circular.
The invention provides a dynamic spot shape correction method, which analyzes the distortion degree and the distortion direction of a spot according to the structural characteristics of a region to be strengthened and the oblique incidence preset angle of a light beam, calculates the angle and the distance of a plano-convex cylindrical lens and a plano-concave cylindrical lens corresponding to each impact spot in a preset strengthening processing path to generate an elliptical parallel light beam with high power density transmitted along the preset angle, and forms a circular spot when the elliptical parallel light beam with high power density irradiates the region to be strengthened on the surface of a part; meanwhile, the shape righting direction and degree of each impact spot can be adjusted in real time in the laser impact strengthening processing process, so that the impact spots are always round, the energy of light beams cannot be attenuated, and the consistency of strengthening processing effects is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a circular beam forming a spot on a surface of a part during oblique incidence laser shock peening according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an oblique incidence laser shock peening speckle dynamic reshaping device according to an exemplary embodiment of the present invention;
fig. 3 is a schematic structural diagram of a spot dynamic reshaping system for oblique incidence laser shock peening according to an exemplary embodiment of the present invention.
Fig. 4 is a flowchart of a method for dynamically reshaping a spot by oblique incidence laser shock peening according to an exemplary embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating an effect of a oblique incidence laser shock peening spot dynamic reshaping method according to an exemplary embodiment of the present invention.
In the figure, 1-light source part incident light beam, 2-light beam shaping component, 3-circular parallel light beam, 4-plano-convex cylindrical lens, 5-convergent elliptical light beam, 6-plano-concave cylindrical lens, 7-elliptical parallel light beam, 8-light beam focusing component, 9-laser shock strengthening light beam, 10-area to be strengthened, 11-first support, 12-first driving part, 13-base, 14-sliding platform, 15-second support, 16-second driving part, 17-third driving part, 18-control bus and 19-control terminal.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
In the following description, numerous details are set forth to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details, and in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring embodiments of the present invention.
Reference to "a plurality" in this application means two or more. "and/or" describe the association relationship of the associated objects, meaning that there may be three relationships, e.g., A and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It should be noted that the beam shaping is to convert a gaussian (TEM00) incident laser beam into a circular, rectangular, square, linear or other customized shape. In practice, a variety of beam shapers are available for selection when performing the beam shaping operation. The spot produced by the beam shaper is often used in laser machining to prevent over-or under-exposure of a particular area, typical applications of beam shapers include: cutting, ablation, perforation, scoring, annealing, medical and aesthetic, microscopic and scientific, light sheet cell counting, and the like.
The lens with one plane being a plane and the other plane being an arc convex surface is called a plano-convex cylindrical lens or a positive cylindrical lens; a lens with one plane and the other arc concave surface is called a plano-concave cylindrical lens and can also be called a negative cylindrical lens. The positive cylindrical lens is equal to a part cut from a cylinder; the negative cylindrical lens is equal to a portion removed by the outer mold forming the cylinder. There is no curvature in the direction of the cylinder axis, and the curvature is zero. The cylinder has the maximum bending degree in the direction vertical to the central line of the cylinder, and the curvature is the maximum. Since the curvature of the cylindrical lens in the direction parallel to the axis is zero and there is no curvature, there is no refraction in the direction when the light passes through the cylindrical lens; the cylindrical lens has the greatest curvature in the direction perpendicular to the axis, so that light passing through the cylindrical lens will be most refracted in this direction. The parallel light beams converge (or diverge) to a focal point after passing through the cylindrical lens, and the focal points are collected to form a straight line which is called a focal line, and the focal line is parallel to the axis.
The technical scheme of the embodiment of the application relates to the technical field of laser shock peening, and is specifically explained by the following embodiment:
fig. 1 is a schematic diagram illustrating a circular beam forming a light spot on a surface of a part during oblique incidence laser shock peening according to an exemplary embodiment of the present invention.
Referring to fig. 1, when a circular laser beam with a radius R obliquely irradiates the surface of a part, a clamping foot between the direction of the laser beam and the normal of the surface to be strengthened is θ, and at this time, a laser shock spot acting on the surface to be strengthened of the part is elongated in the direction of the intersection line between the laser incident surface and the surface to be strengthened of the part, so that spot distortion is generated, and an elliptical shock spot is formed, wherein the major axis of the elliptical shock spot is 2R/cos θ, and the minor axis of the elliptical shock spot is R. When θ is larger than 15 °, spot distortion is severe and the effect of laser shock peening is reduced. Therefore, dynamic correction and roundness reduction of the light spots are important factors for ensuring the strengthening effect, and the dynamic adjusting method is a necessary function of the laser shock strengthening equipment in the strengthening processing process.
In this embodiment, first, a light spot dynamic reshaping device for oblique incidence laser shock peening is provided, as shown in fig. 2, fig. 2 is a schematic structural diagram of a light spot dynamic reshaping device for oblique incidence laser shock peening according to an exemplary embodiment of the present invention, where the light spot dynamic reshaping device includes: the base 13, the beam shaping component 2, the beam reshaping component and the beam focusing component 8; the beam shaping component 2 is arranged on one side of the base 13 and is used for generating a circular parallel light beam 3; the light beam reshaping component is arranged on the base 13 and used for compressing the round parallel light beam 3 into an oval parallel light beam 7, and comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, wherein the plano-convex cylindrical lens unit is arranged on the light emergent side of the light beam reshaping component 2, and the plano-concave cylindrical lens unit is arranged on the light emergent side of the plano-convex cylindrical lens unit; the light beam focusing assembly 8 is arranged on the light-emitting side of the plano-concave cylindrical lens unit.
For example, in the embodiment of the present application, the beam shaping component 2 is a shaping lens group, and after the circular laser beam emitted by the light source device passes through the shaping lens group, the divergent laser beam is shaped into a parallel laser beam to obtain a circular parallel laser beam; the light beam focusing component 8 is a focusing lens group, the elliptical parallel light beam 7 generates a laser beam with high power density after passing through the focusing lens group, and when the laser beam with high power density irradiates on the surface of a part, the impact strengthening can be carried out.
According to the oblique incidence laser shock-enhanced light spot dynamic shape righting device provided by the embodiment of the application, a light beam shaping component 2 receives a light source part incident light beam 1 emitted by a light source part, and generates a circular parallel light beam 3 after shaping adjustment; the circular parallel light beam 3 is continuously compressed in the plano-convex cylindrical lens unit to generate a convergent elliptical light beam 5, and the convergent elliptical light beam 5 generates an elliptical parallel light beam 7 after passing through the plano-concave cylindrical lens unit; the light beam focusing assembly 8 receives the elliptical parallel light beam 7 and then focuses the light beam to generate a laser shock strengthening light beam 9, and the laser shock strengthening light beam irradiates the region 10 to be strengthened of the part at a preset incident angle. The laser shock peening beam 9 is a high-power-density elliptical parallel beam generated after focusing treatment, when the laser shock peening beam is irradiated on a region 10 to be strengthened of a part, the laser shock peening beam 9 is elongated in the direction of an intersection line of a laser incident surface and the region 10 to be strengthened, and a shock spot trace is circular.
In an embodiment of the present application, a plano-convex cylindrical lens cell includes: the first bracket 11 is arranged at one end of the base 13 close to the beam shaping component 2; plano-convex cylindrical lens 4, plano-convex cylindrical lens 4 movable mounting are on first support 11, and the convex surface of plano-convex cylindrical lens 4 is towards the light-emitting side of beam shaping subassembly 2 for compress circular parallel beam 3 into the oval light beam 5 of convergence. In this embodiment, after the circular parallel light beam 3 passes through the plano-convex cylindrical lens 4, due to the light transmission principle of the plano-convex cylindrical lens 4, the circular parallel light beam 3 is compressed in the direction perpendicular to the axis of the cylindrical lens, which is called as a convergent elliptical light beam 5, and the compression degree is higher as the distance is longer.
In one embodiment of the present application, the plano-convex cylindrical lens cell further includes: and the first driving part 12, the first driving part 12 is installed on the first bracket 11, and the output end of the first driving part 12 is connected with the plano-convex cylindrical lens 4 and is used for controlling the plano-convex cylindrical lens 4 to rotate around the direction perpendicular to the axis of the plano-convex cylindrical lens 4. In this embodiment, the length of the long axis of the generated elliptical beam can be controlled by adjusting the angle of the plano-convex cylindrical lens 4 facing the beam shaping component 2. In this embodiment, the first driving portion 12 is an adjusting motor, and an output end of the adjusting motor is connected with the transverse shaft of the plano-convex cylindrical lens 4 through a transmission mechanism. When the adjusting motor rotates, the plano-convex cylindrical lens 4 can be driven to rotate for a certain angle around the direction vertical to the axis of the plano-convex cylindrical lens, so that the length of the long axis of the elliptic section of the converged elliptic light beam 5 is changed.
In one embodiment of the present application, a plano-concave cylindrical lens cell includes: a second bracket 15, wherein the second bracket 15 is arranged at one end of the base 13 close to the light beam focusing assembly 8; and the plane of the plano-concave cylindrical lens 6 faces to the light outlet side of the plano-convex cylindrical lens unit and is used for generating an elliptical parallel light beam 7. In this embodiment, the converged elliptical light beam 5 passes through the plano-concave cylindrical lens 6, and based on the light transmission principle of the plano-concave cylindrical lens 6, the converged light beam is diverged into parallel light beams to generate an elliptical parallel light beam 7.
In one embodiment of the present application, the plano-concave cylindrical lens cell further includes: and the second driving part 16, the second driving part 16 is installed on the second bracket 15, and the output end of the second driving part 16 is connected with the plano-concave cylindrical lens 6 and is used for controlling the plano-concave cylindrical lens 6 to rotate around the direction perpendicular to the axis of the plano-concave cylindrical lens 6. In this embodiment, the second driving portion 16 is an adjusting motor, and an output end of the adjusting motor is connected to the plano-concave cylindrical lens 6 through a transmission mechanism. When the adjusting motor rotates, the plano-concave cylindrical lens 6 can be driven to rotate for a certain angle around the direction vertical to the axis of the plano-concave cylindrical lens, so that the length of the long axis of the elliptic section of the elliptic parallel light beam 7 is adjusted.
In one embodiment of the present application, the plano-concave cylindrical lens cell may further include a sliding portion and a third driving portion 17. The sliding part comprises a sliding rail and a sliding platform 14, the sliding rail is arranged at one end, close to the light beam focusing assembly 8, of the base 13, and the sliding platform 14 is connected with the sliding rail in a sliding mode. The second bracket 15 is mounted on the sliding platform 14 and used for reciprocating on the sliding rail along with the sliding platform 14 so as to be close to or far away from the plano-convex cylindrical lens unit; the plano-concave cylindrical lens 6 is arranged on the second support 15, and the plane of the plano-concave cylindrical lens 6 faces the light outlet side of the plano-convex cylindrical lens unit and is used for generating an elliptical parallel light beam 7; the second driving part 16, the second driving part 16 is installed on the second bracket 15, the output end of the second driving part 16 is connected with the plano-concave cylindrical lens 6, and is used for controlling the plano-concave cylindrical lens 6 to rotate around the direction vertical to the axis of the plano-concave cylindrical lens 6; and the third driving part 17, the third driving part 17 is installed on the base 13, and the output end of the third driving part 17 is connected with the sliding platform 14, and is used for controlling the sliding platform 14 to reciprocate on the sliding rail so as to approach or leave the plano-convex cylindrical lens unit. In this embodiment, the third driving portion 17 is an adjusting motor, an output end of the adjusting motor is connected to the sliding platform 14 through a transmission assembly, and when the adjusting motor rotates, the sliding platform 14 is controlled to reciprocate on the slide rail to approach or separate from the plano-convex cylindrical lens unit, and the distance between the plano-convex cylindrical lens 4 and the plano-concave cylindrical lens is adjusted within a preset distance threshold range, so as to control the dynamic reshaping degree of the light spot. When adjusting the distance between the two lenses, the lens pitch must be smaller than the focal length of the plano-convex cylindrical lens.
According to the oblique incidence laser shock-enhanced light spot dynamic shape righting device, the plano-convex cylindrical lens 4 and the plano-concave cylindrical lens 6 are sequentially arranged in the light beam emission direction, and the circular light beam forms an elliptical parallel light beam 7 irradiated according to a preset angle after passing through the two lenses, so that the shock light spot of the to-be-enhanced area 10 of the part is circular; the rotation angle of the lens is controlled through two adjusting motors so as to control the length of the long axis of the elliptic section of the elliptic light beam 7; the distance between the two lenses is adjusted within a preset distance threshold range, the dynamic correction degree of the light spots is controlled, namely the minor axis size of the elliptical parallel light beams is controlled, the fact that traces of impact spots are round all the time when oblique incidence processing is conducted in different areas is achieved, and the strengthening effect is guaranteed.
In one embodiment of the application, a spot dynamic reshaping system for oblique incidence laser shock peening is provided, and the spot dynamic reshaping system is realized by using the spot dynamic reshaping device. Referring to fig. 3, fig. 3 is a schematic structural diagram of a oblique incidence laser shock peening spot dynamic reshaping system according to an exemplary embodiment of the present invention. The system comprises: the dynamic spot reshaping device is used for compressing the light beam emitted by the light source part into an elliptical parallel light beam 7 through the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit; and the control module is electrically connected with the light spot dynamic correction device and is used for regulating and controlling the angles of the lenses in the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the correction direction of the elliptical parallel light beam 7 and the distance between the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the correction degree of the elliptical parallel light beam 7. In this embodiment, the control module comprises a control terminal 19, a control bus 18; the specific structure of the dynamic spot reshaping device has been described in the foregoing description, and is not described in detail again. The control terminal 19 obtains the structural characteristics and the preset angle of oblique incidence of the light beam of the region 10 to be strengthened of the part, calculates the strengthening processing path of the structural characteristics and the preset angle of oblique incidence of the light beam to obtain a preset strengthening processing path, calculates the angle of the lens to be rotated and the distance to be adjusted according to the preset strengthening processing path, and generates a control instruction. Control commands are transmitted to the spot dynamic reshaping device through a control bus 18, and the rotation of the adjusting motor is controlled to control the rotation angle and the distance of the lens.
In one embodiment of the application, a spot dynamic reshaping method for oblique incidence laser shock peening is provided, and the spot dynamic reshaping method is implemented by using the spot dynamic reshaping device. Referring to fig. 4, fig. 4 is a flowchart of a method for dynamically reshaping a spot by oblique incidence laser shock peening according to an exemplary embodiment of the present invention, the method including the following steps:
s410, obtaining structural characteristics of a region to be strengthened of the part and a preset angle of oblique incidence of a light beam;
s420, calculating a strengthening processing path of the structural characteristics and the oblique incidence preset angle of the light beam to obtain a preset strengthening processing path;
and S430, adjusting the beam reshaping component according to the preset strengthening processing path so as to compress the circular parallel beams generated by the beam reshaping component into elliptical parallel beams.
In this embodiment, the control terminal 19 arranges the impact spots according to the structural features of the region to be strengthened of the part and the preset angle of oblique incidence of the light beam, sets a preset strengthening processing path, and sets the angle and the distance between the plano-convex cylindrical lens 4 and the plano-concave cylindrical lens 6 corresponding to each impact spot; an incident beam 1 of the light source part is adjusted into a circular parallel laser beam by a beam shaping component 2 after being emitted by a laser; the circular parallel laser beams pass through the plano-convex cylindrical lens 4 and the plano-concave cylindrical lens 6 and then are changed into elliptical parallel laser beams 7 compressed along the direction vertical to the axis of the cylindrical lens, and the light intensity is not changed; after the elliptical parallel beams 7 pass through the beam focusing assembly 8, elliptical parallel laser beams with high power density are generated and are irradiated on the surface of a part at a certain angle according to the set spot size, and after the elliptical parallel laser beams with high power density are elongated in the direction of the intersection line of the laser light incidence surface and the part strengthening surface, the impact spot trace is circular; after the current impact spot is finished and before the next impact spot starts, the control terminal 19 adjusts the angles of the plano-convex cylindrical lens 4 and the plano-concave cylindrical lens 6 and the distance between the plano-convex cylindrical lens and the plano-concave cylindrical lens 6 through the adjusting motor so as to adjust the shape correcting direction and the shape correcting degree of the light spot, namely to adjust the lengths of the long axis and the short axis of the elliptic section of the elliptic light beam. According to the mode, the trace of the impact spot is always round when the oblique incidence processing is carried out, and the strengthening effect is ensured.
Referring to FIG. 5, there are shownFig. 5 is a schematic effect diagram of a method for dynamically reshaping a light spot by oblique incidence laser shock peening according to an exemplary embodiment of the present invention. The included angle between the laser shock strengthening beam 9 and the surface normal of the part is theta, and the sectional area is pi R 2 The circular light beam passes through the plano-convex cylindrical lens and the plano-concave cylindrical lens to generate a section area of pi R 2 The elliptic parallel beams of cos theta are elongated in the direction of the intersection line of the laser incident surface and the part reinforcing surface to form an area of pi R 2 Of the circular light spot.
In summary, the present invention provides a device, a system, and a method for dynamically correcting a light spot by oblique incidence laser shock enhancement, wherein a circular light beam incident from a light source element is converted into an elliptical parallel light beam by a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit, and the elliptical parallel light beam can generate a circular light spot when irradiating a region to be enhanced of a part at a large angle, without affecting the enhancement effect; in addition, each light spot can form a uniform residual compressive stress field by adjusting the angle and the spacing of the lenses. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An oblique incidence laser shock peening speckle dynamic orthotic device, comprising:
a base;
the light beam shaping assembly is arranged on one side of the base and used for receiving the light beam and generating a circular parallel light beam;
the light beam reshaping component is arranged on the base and used for compressing the round parallel light beams into oval parallel light beams, and comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, wherein the plano-convex cylindrical lens unit is arranged on the light emergent side of the light beam reshaping component, and the plano-concave cylindrical lens unit is arranged on the light emergent side of the plano-convex cylindrical lens unit; and
and the light beam focusing assembly is arranged on the light emergent side of the plano-concave cylindrical lens unit.
2. The oblique-incidence laser shock-enhanced spot dynamic orthotic device according to claim 1, wherein the plano-convex cylindrical lens unit comprises:
the first bracket is arranged at one end, close to the light beam shaping assembly, of the base;
and the convex surface of the plano-convex cylindrical lens faces the light-emitting side of the light beam shaping component and is used for continuously compressing the circular parallel light beams into elliptical light beams.
3. The oblique-incidence laser shock-enhanced spot dynamics shape correcting device according to claim 2, wherein the plano-convex cylindrical lens unit further comprises:
the first driving part is installed on the first support, and the output end of the first driving part is connected with the plano-convex cylindrical lens and used for controlling the plano-convex cylindrical lens to rotate around the direction perpendicular to the axis of the plano-convex cylindrical lens.
4. The oblique-incidence laser shock-enhanced spot dynamic orthotic device according to claim 1, wherein the plano-concave cylindrical lens unit comprises:
the second bracket is arranged at one end, close to the light beam focusing assembly, of the base;
and the plane of the plano-concave cylindrical lens faces the light outlet side of the plano-convex cylindrical lens unit and is used for generating the elliptical parallel light beams.
5. The oblique-incidence laser shock-enhanced spot dynamics reshaping apparatus as claimed in claim 4, wherein the plano-concave cylindrical lens unit further comprises:
and the output end of the second driving part is connected with the plano-concave cylindrical lens and is used for controlling the plano-concave cylindrical lens to rotate around the direction vertical to the axis of the plano-concave cylindrical lens.
6. The oblique-incidence laser shock-enhanced spot dynamics shape correcting device according to claim 5, wherein the plano-concave cylindrical lens unit further comprises:
the sliding part comprises a sliding rail and a sliding platform, the sliding rail is arranged at one end, close to the light beam focusing assembly, of the base, and the sliding platform is connected with the sliding rail in a sliding mode;
the second support is mounted on the sliding platform and used for sliding on the sliding rail along with the sliding platform so as to be close to or far away from the plano-convex cylindrical lens unit.
7. The oblique-incidence laser shock-enhanced spot dynamics reshaping apparatus as claimed in claim 6, wherein the plano-concave cylindrical lens unit further comprises:
and the output end of the third driving part is connected with the sliding platform and used for controlling the sliding platform to slide on the sliding rail to be far away from or close to the plano-convex cylindrical lens unit.
8. The system for dynamically reshaping a light spot using the oblique incidence laser shock peening device of any of claims 1 to 7, wherein the system for dynamically reshaping a light spot comprises:
the light spot dynamic shape righting device is used for compressing the light beam into an elliptical parallel light beam through the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit;
and the control module is electrically connected with the light spot dynamic reshaping device and is used for regulating and controlling the angles of the lenses in the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the reshaping direction of the elliptic parallel light beams and the distance between the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit so as to control the reshaping degree of the elliptic parallel light beams.
9. The method for dynamically reshaping a light spot by using the oblique incidence laser shock peening light spot dynamic reshaping device according to any one of claims 1 to 7, comprising:
acquiring structural characteristics of a region to be strengthened of a part and a preset angle of oblique incidence of a light beam;
performing strengthening processing path calculation on the structural characteristics and the light beam oblique incidence preset angle to obtain a preset strengthening processing path;
adjusting the beam reshaping component according to the preset strengthening processing path to compress the round parallel beams generated by the beam reshaping component into elliptical parallel beams;
the light beam reshaping component comprises a plano-convex cylindrical lens unit and a plano-concave cylindrical lens unit which are sequentially arranged, the plano-convex cylindrical lens unit is arranged on the light emergent side of the light beam reshaping component, and the plano-concave cylindrical lens unit is arranged on the light emergent side of the plano-convex cylindrical lens unit.
10. The method for dynamically reshaping a light spot according to claim 9, wherein adjusting a beam reshaping component according to the predetermined augmentation process path comprises:
and adjusting the same rotation angle of the lenses in the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit according to the preset strengthening processing path, and adjusting the distance between the plano-convex cylindrical lens unit and the plano-concave cylindrical lens unit within a preset distance threshold range.
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| CN202210665718.7A CN115121943A (en) | 2022-06-13 | 2022-06-13 | Oblique incidence laser shock-enhanced light spot dynamic shape correcting device, system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116618836A (en) * | 2023-07-21 | 2023-08-22 | 上海泽丰半导体科技有限公司 | Probe welding method of probe card, beam shaping method and optical path |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116618836A (en) * | 2023-07-21 | 2023-08-22 | 上海泽丰半导体科技有限公司 | Probe welding method of probe card, beam shaping method and optical path |
| CN116618836B (en) * | 2023-07-21 | 2023-10-17 | 上海泽丰半导体科技有限公司 | Probe welding method of probe card, beam shaping method and optical path |
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