CN115384044A - Laser in-situ heating rolling equipment and method for forming large-area microstructure - Google Patents
Laser in-situ heating rolling equipment and method for forming large-area microstructure Download PDFInfo
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- CN115384044A CN115384044A CN202211083472.9A CN202211083472A CN115384044A CN 115384044 A CN115384044 A CN 115384044A CN 202211083472 A CN202211083472 A CN 202211083472A CN 115384044 A CN115384044 A CN 115384044A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 63
- 238000010438 heat treatment Methods 0.000 title claims abstract description 40
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002861 polymer material Substances 0.000 claims abstract description 116
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000004093 laser heating Methods 0.000 claims abstract description 27
- 230000001678 irradiating effect Effects 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 7
- 239000011664 nicotinic acid Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000010923 batch production Methods 0.000 abstract description 9
- 238000003672 processing method Methods 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000007769 metal material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005459 micromachining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/10—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation for articles of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0838—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using laser
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of microstructure forming, and provides laser in-situ heating rolling equipment and a laser in-situ heating rolling method for forming a large-area microstructure, which comprise the following steps: the conveying mechanism is used for conveying the polymer material forwards; the laser heating device is arranged above the conveying mechanism and is used for irradiating laser to the upper surface of the polymer material; the rolling device is arranged in front of the conveying mechanism, a forming roller of the rolling device is arranged above the polymer material, a first set microstructure is arranged on the outer circular surface of the forming roller, and the forming roller is used for rolling the upper surface of the polymer material; and a cooling device arranged in front of the rolling device, wherein the cooling device is used for cooling the polymer material rolled by the forming roller. The method solves the problem that the microstructure processing method in the prior art can not meet the requirements of large-area and large-batch production of the microstructure.
Description
Technical Field
The invention relates to the technical field of microstructure forming, in particular to laser in-situ heating rolling equipment and a laser in-situ heating rolling method for forming a large-area microstructure.
Background
With the continuous progress and development of scientific technology, micro-nano structures are widely applied to important related fields of the country, for example, the drag reduction micro structures in the micro structures are used for drag reduction and antifouling of ships and warships.
The functional surface of the microstructure is characterized by very small characteristic dimension, higher depth-to-width ratio, complex texture structure, complex three-dimensional appearance and the like, and the microstructure is usually formed on the surface of a polymer. The processing of large areas of surface microstructures is therefore far more difficult than for macrostructures. At present, various processing methods such as LIGA, micromachining, micro-imprinting, etc. are proposed for microstructures at home and abroad. Although a micro-machining method is adopted to machine the V-shaped groove microstructure, the wind tunnel experiment shows that the drag reduction can reach 9.56% under the condition of 0.2 MPa. However, non-silicon machining techniques have various limitations in terms of processing efficiency, machinable materials, and manufacturing costs. In addition, micro-embossing can be adopted as one of plastic micro-forming technologies, and the method has the advantages of high forming efficiency, low cost and simple process; for coarse grain materials, the microstructure has poor surface quality and wrinkles when the cavity width is small, and for ultra-fine grain materials, the formed ribs have good quality all the time.
However, as the application range of the microstructure surface in the industry is wider, the existing microstructure processing methods cannot meet the requirement of large-area and large-batch production of the microstructure.
Disclosure of Invention
The invention aims to solve the problem that the processing method of the microstructure in the prior art can not meet the large-area and large-batch production requirements of the microstructure.
In order to solve the above problems, the present invention provides a laser in-situ heating rolling apparatus for forming a large area microstructure, comprising:
the conveying mechanism is used for conveying the polymer material forwards;
the laser heating device is arranged above the conveying mechanism and is used for irradiating laser to the upper surface of the polymer material;
the rolling device is arranged in front of the conveying mechanism, a forming roller of the rolling device is arranged above the polymer material, a first set microstructure is arranged on the outer circular surface of the forming roller, and the forming roller is used for rolling the upper surface of the polymer material; and
and the cooling device is arranged in front of the rolling device and is used for cooling the polymer material rolled by the forming roller.
Optionally, the laser heating device is used for irradiating and heating only the upper surface of the polymer material into a viscous state.
Optionally, the laser heating device comprises:
a laser emitter for irradiating laser to the polymer material; and
and the control system is used for adjusting at least one of laser power, scanning speed, scanning interval and irradiation time of the laser emitted by the laser emitter.
Optionally, the cooling device is a spray cooling device for spray cooling the upper surface of the polymer material rolled by the forming roll.
Optionally, the rolling device further comprises a support mechanism disposed below the forming roll, the support mechanism being configured to support the polymer material, the polymer material being adapted to pass between the support mechanism and the forming roll;
wherein, the supporting mechanism is a smooth auxiliary roller or a supporting plate.
Optionally, the rolling device further comprises:
the distance adjusting mechanism is connected with the supporting mechanism or the forming roller and is used for adjusting the distance between the supporting mechanism and the forming roller; or/and
and the rotating speed adjusting mechanism is connected with the driving mechanism of the forming roller and is used for adjusting the rotating speed of the forming roller, wherein the driving mechanism is in transmission connection with the forming roller.
Optionally, the laser in-situ heating and rolling equipment for forming the large-area microstructure further comprises a release agent spraying mechanism, the release agent spraying mechanism is arranged at the forming roller, and the release agent spraying mechanism is used for spraying a release agent to the forming roller.
Optionally, the first set microstructure arranged on the outer circumferential surface of the forming roll is a bionic drag reduction surface microstructure.
The invention provides a laser in-situ heating rolling method for forming a large-area microstructure, which comprises the following steps of:
irradiating and heating only the upper surface of the polymer material into a viscous state by using laser, and keeping the polymer material in an elastic state;
rolling the upper surface of the polymeric material using a forming roll;
cooling the polymer mass;
wherein the outer circumferential surface of the forming roll is provided with a first set microstructure.
Optionally, before only the upper surface of the polymer mass is heated by irradiation with the laser to a viscous state while the polymer mass is kept in an elastic state:
adjusting parameters of the emitted laser according to the material properties of the polymer material, wherein the parameters of the emitted laser at least comprise: at least one of laser power, scanning speed, scanning pitch, irradiation time of the laser.
Compared with the prior art, the invention has the following technical effects:
when the polymer material rolling device is used, a conveying mechanism is used for conveying a polymer material forwards, when the polymer material moves to a laser irradiation position of the laser heating device, the laser heating device irradiates laser to the upper surface of the polymer material, the non-contact in-situ heating of a deformation area of the upper surface of the polymer material is realized by utilizing the characteristics of high laser energy absorption rate, fast absorption and low heat conductivity coefficient of the polymer, so that the upper surface of the polymer material is softened and melted to reach a viscous state after being heated, particularly, the characteristics of low heat conductivity coefficient of the polymer are utilized, only the upper surface of the polymer material is melted to be the viscous state after being irradiated and heated by the laser, the interior of the polymer material is still kept in an elastic state, and the influence on the interior of the polymer material is small; in addition, considering the problem that the polymer is more prone to buckling deformation relative to the surface microstructure of the metal material, after the rolling forming, the polymer material rolled by the forming roller is cooled by a cooling device, so that the second set microstructure formed on the upper surface of the polymer material is rapidly cooled, the large-area buckling deformation of the polymer material is reduced, and the forming precision of the second set microstructure formed on the upper surface of the polymer material is ensured. Therefore, the conveying mechanism, the laser heating device, the forming roller of the rolling device and the cooling device are matched with each other, and large-area and large-batch production of the microstructure on the surface of the polymer material is realized. Therefore, the problem that the micro-structure processing method in the prior art cannot meet the requirements of large-area and large-batch production of the micro-structure is solved.
Drawings
FIG. 1 is a schematic structural diagram of the laser in-situ heating rolling device for forming a large-area microstructure according to the invention;
FIG. 2 is a schematic flow chart of the laser in-situ heating rolling method for forming a large-area microstructure according to the present invention.
Description of reference numerals: support means 1, transport means 2, laser heating means 3, forming roll 4, first defined microstructure 41, cooling means 5, polymer mass 6, second defined microstructure 61.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to "an embodiment," "one embodiment," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment or implementation of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.
The X-axis in the drawings indicates the front-rear direction, wherein the forward direction of the X-axis (the direction of the arrow) indicates the front, and the backward direction of the X-axis (the reverse direction of the arrow) indicates the back; the Z axis represents the up-down direction, wherein the forward direction of the Z axis (the direction of the arrow) represents the up direction, and the backward direction of the Z axis (the reverse direction of the arrow) represents the down direction.
To solve the above technical problem, as shown in fig. 1, the present invention provides a laser in-situ heating rolling apparatus for forming a large-area microstructure, comprising:
a conveying mechanism 2 for conveying the polymer material 6 forward;
the laser heating device is arranged above the conveying mechanism 2 and is used for irradiating laser to the upper surface of the polymer material 6;
a rolling device arranged in front of the conveying mechanism 2, wherein a forming roll of the rolling device is arranged above the polymer material 6, the outer circumferential surface of the forming roll is provided with a first set microstructure 41, and the forming roll is used for rolling the upper surface of the polymer material 6; and
and a cooling device 5 arranged in front of the rolling device, wherein the cooling device 5 is used for cooling the polymer material 6 rolled by the forming roller.
The transport means 2 here may be a conveyor belt.
The polymer material 6 may have a plate-like structure or a soft large-area sheet-like structure.
In addition, the laser heating device may heat the entire upper surface of the polymer material 6, or may irradiate and heat a certain region of the upper surface of the polymer material 6;
accordingly, the first set of microstructures 41 may be provided on the entire outer circumferential surface of the forming roll, or may be provided in a local region of the outer circumferential surface of the forming roll.
In addition, the characteristic sizes of the micro-structure formed by the laser in-situ heating rolling equipment for forming the large-area micro-structure are micron scale and submicron scale, and the forming area is more than or equal to 1cm 2 Preferably 0.5m 2 To 3m 2 。
In addition, the in-situ heating refers to the synchronous heating of the materials in the process of material forming, and the common heating only can integrally heat the materials and then form the materials.
In addition, the former rolls the upper surface of the polymer mass 6 through the first set of microstructures 41 provided on the outer circumferential surface of the former, so that the upper surface of the polymer mass 6 forms corresponding second set of microstructures 61.
When the device is used, the polymer material 6 is conveyed forwards by the conveying mechanism 2, when the polymer material 6 moves to a laser irradiation position of the laser heating device, the laser heating device irradiates laser to the upper surface of the polymer material 6, and non-contact in-situ heating of a deformation region of the upper surface of the polymer material 6 is realized by utilizing the characteristics of high laser energy absorption rate, fast absorption and low thermal conductivity of the polymer, so that the upper surface of the polymer material 6 is softened and melted to reach a viscous state after being heated, particularly, the upper surface of the polymer material 6 is only melted to be the viscous state after being heated by the laser irradiation, the inside of the polymer material 6 is still kept in an elastic state and has small influence on the inside of the polymer material 6, on the basis, the polymer material 6 is conveyed to a forming roller of a rolling device, and a set microstructure is arranged on the outer circumferential surface of the forming roller, so that the forming roller rolls the upper surface of the viscous state of the polymer material 6, and the second set microstructure 61 of the upper surface of the polymer material 6 is beneficial to be quickly and efficiently formed in a rolling process; in addition, considering the problem that the polymer is more prone to buckling deformation relative to the surface microstructure of the metal material, after the rolling forming, the polymer material 6 rolled by the forming roll is cooled by the cooling device 5, so that the second set microstructure 61 formed on the upper surface of the polymer material 6 is rapidly cooled, the large-area buckling deformation of the polymer material 6 is reduced, and the forming precision of the second set microstructure 61 formed on the upper surface of the polymer material 6 is ensured. Therefore, the conveying mechanism 2, the laser heating device, the forming roller of the rolling device and the cooling device 5 are mutually matched to realize large-area and large-batch production of the microstructure on the surface of the polymer material 6. Therefore, the problem that the micro-structure processing method in the prior art cannot meet the requirements of large-area and large-batch production of the micro-structure is solved.
Referring to fig. 1, further, the laser heating device is used to irradiate and heat only the upper surface of the polymer material 6 into a viscous state.
The laser heating device irradiates laser to the upper surface of the polymer material 6, and non-contact in-situ heating of a deformation area of the upper surface of the polymer material 6 is realized by utilizing the characteristics of high laser energy absorption rate, fast absorption and low heat conductivity coefficient of the polymer, so that the upper surface of the polymer material 6 becomes soft and molten after being heated to reach a viscous state, and particularly, the characteristics of low heat conductivity coefficient of the polymer are utilized, only the upper surface of the polymer material 6 is heated by laser irradiation and is molten into the viscous state, the interior of the polymer material 6 is still kept in an elastic state, and the influence on the interior of the polymer material 6 is small.
Referring to fig. 1, further, the laser heating apparatus includes:
a laser emitter for irradiating laser to the polymer material 6; and
and the control system is used for adjusting at least one of laser power, scanning speed, scanning interval and irradiation time of the laser emitted by the laser emitter.
And adjusting at least one of laser power, scanning speed, scanning interval and irradiation time of laser emitted by the laser emitter through a control system, so as to adjust the laser of the polymer material 6 irradiated by the laser emitter, and ensure that the laser heating device only irradiates and heats the upper surface of the polymer material 6 to be in a viscous state.
For example, the polymer material 6 may be a polystyrene material, the laser heating device is started, and specifically, the laser heating system may be used, a working instruction is set for the laser heating device, a laser of the laser heating device is turned on, laser parameters are set, the laser power may be 2W, the spot diameter may be 5mm, the irradiation time at each positioning may be 0.1s, the laser heating device emits laser light and irradiates the surface of the polymer material 6 through the optical path system, the surface of the substrate of the polymer material 6 absorbs the laser energy and converts the laser energy into a viscous state, and whether the interior of the polymer material 6 is in an original state or not is determined by observing the surface melting degree of the polymer material 6 or the hardness of the interior of the polymer material 6 after the irradiation and the interior of the polymer material 6 before the irradiation, and the laser power, the scanning speed, the scanning interval and the irradiation time of the laser emitted by the laser heating device are adjusted in the process, so that the interior of the polymer material 6 is still in the original state, that the interior of the polymer material is in an elastic state.
Referring to fig. 1, further, the cooling device 5 is a spray cooling device 5, and the cooling device 5 is used for spray cooling the upper surface of the polymer material 6 rolled by the forming roll.
By spray cooling, the upper surface of the polymer mass 6 can be cooled uniformly over a wide range.
Referring to fig. 1, further, the rolling device further comprises a supporting mechanism 1, the supporting mechanism 1 is arranged below the forming roll, the supporting mechanism 1 is used for supporting the polymer material 6, and the polymer material 6 is suitable for passing between the supporting mechanism 1 and the forming roll;
wherein, the supporting mechanism 1 is a smooth auxiliary roller or a supporting plate.
Referring to fig. 1, further, the rolling device further includes:
a spacing adjusting mechanism connected with the supporting mechanism 1 or the forming roll, wherein the adjusting mechanism is used for adjusting the distance between the supporting mechanism 1 and the forming roll; or/and
and the rotating speed adjusting mechanism is connected with the driving mechanism of the forming roller and is used for adjusting the rotating speed of the forming roller, wherein the driving mechanism is in transmission connection with the forming roller.
The distance between the supporting mechanism 1 and the forming roller is adjusted by a spacing adjusting mechanism, and the rotating speed of the forming roller is adjusted by a rotating speed adjusting mechanism, so that the forming roller presses a micro-structure with a micron or submicron scale on the upper surface of the polymer.
Referring to fig. 1, further, the laser in-situ heating rolling device for forming the large-area microstructure further comprises a release agent spraying mechanism, wherein the release agent spraying mechanism is arranged at the forming roller and is used for spraying a release agent to the forming roller.
In consideration of the problem that the polymer is difficult to demould after being formed relative to the microstructure of the surface of the metal material, the release agent is sprayed to the forming roller by the release agent spraying mechanism, so that the elastomer in the polymer material 6 can be demoulded without damage, and the problem that the forming roller is adhered to the polymer material 6 is effectively solved. In addition, the release agent may be a high-efficiency release agent.
Referring to fig. 1, further, the first set microstructure 41 disposed on the outer circumferential surface of the forming roll is a bionic drag reduction surface microstructure. So that the upper surface of the polymer material 6 forms a corresponding bionic drag reduction surface microstructure. Therefore, the polymer material 6 with the bionic drag reduction surface microstructure can effectively reduce fuel consumption, improve the ship speed, reduce the transportation cost, powerfully promote the wide application of the drag reduction microstructure manufacturing technology on ships and warships, provide an important solution for the development of the field of drag reduction and fouling prevention of marine transportation, can obviously improve the fouling prevention and drag reduction capability of ships in China, and has great significance for enhancing the performance of marine transportation equipment in China.
In addition, the shape parameters and the array mode of the first set microstructure 41 arranged on the outer circular surface of the forming roll can be determined according to the required application occasions, for example, the shape parameters and the array mode can be used for a bionic drag reduction surface microstructure, and the critical characteristic dimension of the sharkskin surface can be extracted by carrying out structural analysis on the sharkskin surface, so that the characteristic dimensions and the array mode of the first set microstructure and the second set microstructure can be determined, and the optimal drag reduction microstructure can be obtained.
After the first set microstructure 41 is designed, parameters in the roll forming process, such as the rolling speed and the roll gap, may be simulated by using numerical simulation software to determine an approximate range of process parameters, and then a small-area trial mold for roll forming is performed, so as to optimize filling behavior, dimensional accuracy, surface topography, and the like of the material in the forming process of the small-area trial mold, thereby further determining the process parameters for roll forming.
Referring to fig. 1 and 2, in addition, the invention also provides a laser in-situ heating rolling method for forming a large-area microstructure, which comprises the following steps:
only the upper surface of the polymer material 6 is irradiated and heated into a viscous state by using laser, and the inside of the polymer material 6 is kept in an elastic state;
rolling the upper surface of the polymeric material 6 using a forming roll;
cooling the polymer mass 6;
wherein the outer circumferential surface of the forming roll is provided with a first set of microstructures 41.
Only irradiating and heating the upper surface of the polymer material 6 into a viscous state by using laser, keeping the inside of the polymer material 6 in an elastic state, and realizing non-contact in-situ heating of a deformation area of the upper surface of the polymer material 6 by using the characteristics of high laser energy absorption rate, fast absorption and low heat conductivity coefficient of the polymer, so that the upper surface of the polymer material 6 becomes soft and molten after being heated to reach the viscous state, and particularly, by using the characteristics of low heat conductivity coefficient of the polymer, only melting the upper surface of the polymer material 6 into the viscous state through laser irradiation heating, keeping the inside of the polymer material 6 in the elastic state, and having little influence on the inside of the polymer material 6, on the basis, rolling the upper surface of the polymer material 6 by using a forming roller, and setting a micro structure by using the outer circular surface of the forming roller, so that the forming roller rolls the upper surface of the viscous state of the polymer material 6, which is beneficial to quickly and efficiently forming a second setting micro structure 61 of the upper surface of the polymer material 6 in the rolling process; in addition, considering the problem that the polymer is more prone to buckling deformation relative to the surface microstructure of the metal material, after the rolling forming, the polymer material 6 rolled by the forming roll is cooled, so that the second set microstructure 61 formed on the upper surface of the polymer material 6 is rapidly cooled, thereby reducing the large-area buckling deformation of the polymer material 6 and ensuring the forming precision of the second set microstructure 61 formed on the upper surface of the polymer material 6. Therefore, the laser in-situ heating rolling method for forming the large-area microstructure disclosed by the invention is utilized to realize large-area and large-batch production of the microstructure on the surface of the polymer material 6. Therefore, the problem that the micro-structure processing method in the prior art cannot meet the requirements of large-area and large-batch production of the micro-structure is solved.
Referring to fig. 1 and 2, further, before only the upper surface of the polymer material 6 is irradiated and heated to a viscous state by using the laser and the polymer material 6 is maintained in an elastic state:
adjusting parameters of the emitted laser according to the material properties of the polymer material 6, wherein the parameters of the emitted laser at least comprise: at least one of laser power, scanning speed, scanning pitch, irradiation time of the laser. So that the laser irradiates and heats only the upper surface of the polymer material 6 into a viscous state.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A laser in-situ heating rolling equipment for forming a large-area microstructure is characterized by comprising:
-a conveying mechanism (2) for conveying the polymer mass (6) forward;
the laser heating device (3) is arranged above the conveying mechanism (2), and the laser heating device (3) is used for irradiating laser to the upper surface of the polymer material (6);
the rolling device is arranged in front of the conveying mechanism (2), a forming roller (4) of the rolling device is arranged above the polymer material (6), the outer circular surface of the forming roller (4) is provided with a first set microstructure (41), and the forming roller (4) is used for rolling the upper surface of the polymer material (6); and
cooling means (5) arranged in front of said rolling means, said cooling means (5) being adapted to cool said polymer mass (6) rolled by said forming roll (4).
2. The laser in-situ heating rolling equipment for forming the large-area microstructure according to claim 1, wherein the laser heating device (3) is used for heating only the upper surface of the polymer material (6) to be in a viscous state by irradiation.
3. Laser in-situ heating rolling equipment for large area microstructure formation according to claim 1, wherein the laser heating device (3) comprises:
a laser emitter for irradiating laser light to the polymer material (6); and
and the control system is used for adjusting at least one of laser power, scanning speed, scanning interval and irradiation time of the laser emitted by the laser emitter.
4. The laser in-situ heating and rolling apparatus for forming large-area microstructures according to claim 1, wherein the cooling device (5) is a spray cooling device (5), and the cooling device (5) is used for spray cooling the upper surface of the polymer material (6) rolled by the forming roll (4).
5. The laser in-situ heating and rolling apparatus for forming large-area microstructures according to claim 1, wherein the rolling device further comprises a supporting mechanism (1), the supporting mechanism (1) is disposed below the forming roll (4), the supporting mechanism (1) is used for supporting the polymer material (6), and the polymer material (6) is suitable for passing between the supporting mechanism (1) and the forming roll (4);
wherein the supporting mechanism (1) is a smooth auxiliary roller or a supporting plate.
6. The laser in-situ heating rolling device for forming the large-area microstructure according to claim 5, wherein the rolling device further comprises:
a spacing adjusting mechanism connected with the supporting mechanism (1) or the forming roll (4), wherein the adjusting mechanism is used for adjusting the distance between the supporting mechanism (1) and the forming roll (4); or/and
and the rotating speed adjusting mechanism is connected with a driving mechanism of the forming roller (4) and is used for adjusting the rotating speed of the forming roller (4), wherein the driving mechanism is in transmission connection with the forming roller (4).
7. The laser in-situ heating and rolling device for forming the large-area microstructure according to claim 1, wherein the laser in-situ heating and rolling device for forming the large-area microstructure further comprises a release agent spraying mechanism, the release agent spraying mechanism is arranged at the forming roller (4), and the release agent spraying mechanism is used for spraying release agent to the forming roller (4).
8. The laser in-situ heating and rolling equipment for forming the large-area microstructure according to claim 1, wherein the first set microstructure (41) arranged on the outer circumferential surface of the forming roll (4) is a bionic drag reduction surface microstructure.
9. A laser in-situ heating rolling method for forming a large-area microstructure is characterized by comprising the following steps:
only irradiating and heating the upper surface of the polymer material (6) into a viscous state by using laser, and keeping the interior of the polymer material (6) in an elastic state;
rolling the upper surface of the polymer mass (6) using a forming roll (4);
cooling the polymer mass (6);
wherein the outer circumferential surface of the forming roll (4) is provided with a first set microstructure (41).
10. The laser in-situ heating and rolling method for forming large area microstructures according to claim 9, wherein before the upper surface of the polymer material (6) is heated to viscous state by laser irradiation and the polymer material (6) is kept in elastic state:
adjusting parameters of the emitted laser light according to material properties of the polymer material (6), the parameters of the emitted laser light at least comprising: at least one of laser power, scanning speed, scanning pitch, irradiation time of the laser.
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| CN202211083472.9A CN115384044A (en) | 2022-09-06 | 2022-09-06 | Laser in-situ heating rolling equipment and method for forming large-area microstructure |
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| CN202211083472.9A CN115384044A (en) | 2022-09-06 | 2022-09-06 | Laser in-situ heating rolling equipment and method for forming large-area microstructure |
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