CN114457404B - Surface microtexture large-area processing method and device based on roller electrode - Google Patents
Surface microtexture large-area processing method and device based on roller electrode Download PDFInfo
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- CN114457404B CN114457404B CN202111588052.1A CN202111588052A CN114457404B CN 114457404 B CN114457404 B CN 114457404B CN 202111588052 A CN202111588052 A CN 202111588052A CN 114457404 B CN114457404 B CN 114457404B
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/008—Current shielding devices
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
- C25D17/12—Shape or form
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/04—Removal of gases or vapours ; Gas or pressure control
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/02—Electroplating of selected surface areas
- C25D5/022—Electroplating of selected surface areas using masking means
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/04—Electroplating with moving electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/18—Electroplating using modulated, pulsed or reversing current
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
Abstract
The invention provides a surface micro-texture large-area processing method and device based on a roller electrode, which utilize a metal roller as a tool electrode, wrap a mask plate with a hollow structure to be processed on the surface of the electrode, apply a pulse power supply between the tool electrode and a workpiece, and utilize the electrodeposition principle, thereby realizing the rapid deposition molding of a micro-nano array structure on the surface of the workpiece. The method adopts a follow-up high-pressure external flushing mode, the nozzle and the roller move in a follow-up way, and the high-speed flushing of the electrodeposition area is kept at all times by utilizing a high-pressure nozzle device. Meanwhile, the roller is controlled to move in a certain track, so that the electrode roller can completely sweep the surface of the workpiece, and the large-area and trans-scale efficient preparation of the bionic functional surface micro-nano structure is realized. The invention is not only a functional surface preparation method which is quick, simple and has strong applicability, but also can adapt to any curved surface in a self-adaptive way, thereby realizing flexible processing. Meanwhile, the multi-roller processing can also solve the problems of low processing efficiency, small microstructure forming height, poor dimensional accuracy and the like of the single-roller electrode.
Description
Technical Field
The invention relates to the technical field of special processing, in particular to a surface micro-texture large-area processing method and device based on a roller electrode.
Background
With the rapid development of science and technology, the requirements of fields such as aerospace, national defense, military industry and advanced medical instruments on the surface roughness precision of large-area workpieces are higher and higher, the irregular patterns on the surfaces of the workpieces can reach the micron-scale characteristic scale, the shape and structure are complex, the forming precision is high, the surface roughness is small, microcracks and internal stress are avoided, and the requirements on special surface properties are met in the application occasions such as acid and alkali, high temperature and high pressure, so that the requirements on processing large-area workpieces are difficult to be met by the traditional additive manufacturing method.
In recent years, special processing methods for small-sized products have been greatly developed, such as spark deposition, chemical vapor deposition, jet deposition, and the like. Although spark deposition can improve the wear resistance and corrosion resistance of parts and can deposit micro structures, the machining area is smaller, large-area machining cannot be realized, the requirements of jet deposition on deposited materials are limited, and the requirements are important factors for restricting the wide application of the materials.
The Chinese patent with the authority of CN109989063B discloses a preparation method of an alloy surface micro-texture on the 2019, 7 and 9 days. The method can realize micro-texture processing of various specifications and sizes, has the advantages of simple required equipment, low cost, wide process application range and flexible control, and can carry out surface texture processing on test pieces with complex shapes. However, this method cannot produce a specific surface micro texture, such as triangles, squares, etc., on the surface of the part to be processed, and only the general topography of the surface can be controlled.
In 2019, 12 months and 17 days, china patent with the application number of CN201910975503.3 discloses an electrochemical pretreatment-in-situ electrodeposition method, which adopts a surface electrochemical pretreatment-in-situ electrodeposition technology to carry out electrochemical pretreatment on the surface of a substrate, then adopts an in-situ technology to maintain the surface state of the pretreated substrate, directly enters an electrodeposition process to carry out electrodeposition layer growth, and can obviously improve the bonding strength of an electrodeposition layer and the substrate, wherein the bonding strength can be even higher than the tensile strength of the substrate. However, the method is mainly aimed at depositing metal films, and cannot deposit arrays of micro structures in a large area.
The Chinese patent with the authority of CN107931605B discloses a 3D printing manufacturing method for the micro-texture of the surface of a friction pair, which is to carry out laser sintering treatment on an element to be processed according to a preset track by using a laser device to form the micro-texture of the surface of the friction pair, thereby effectively improving the friction resistance and the friction resistance of the friction surface. However, this method uses a numerically controlled grinder, which places a large limit on the size of the workpiece, and cannot finish the machining continuously and over a large area.
The invention discloses an automatic barrel plating production line for 2021, 5 months and 18 days, and Chinese patent with the application number of CN202010443816.7, which relates to the technical field of barrel plating production lines, in particular to an automatic barrel plating production line, comprising a barrel plating system, a material transfer system, a dehydrogenation system and an automatic control system, wherein the barrel plating system comprises an electroplating device, a cleaning device, a drying cylinder and a movable hanging bracket, and the material transfer system comprises a material transfer device; the material transfer device comprises a lifting frame, a supporting seat and a fixing frame; the upper end of the lifting frame is provided with a first motor, the output end of the first motor is fixedly connected with a driving roller, a lifting belt for lifting the supporting seat is wound on the driving roller, and the dehydrogenation system comprises an oven and a material receiving device; the material receiving device comprises a conveying frame, a material basket and a conveying mechanism, wherein a first pushing mechanism is arranged on the conveying frame. Parts in the drying cylinder can be automatically poured into the material basket through the material transfer device, and the conveying mechanism can drive the material basket to move to the oven, so that the automation degree of the hanging plating production line is effectively improved.
Disclosure of Invention
The invention aims to: the invention provides a processing method and a device applied to a large-area micro-machined part, which adopt the surface micro-texture large-area processing method and the device based on roller electrodes, thereby ensuring the processing precision and not being limited by the size of the processing area, and further realizing the efficient, large-area and high-precision processing.
In order to achieve the above purpose, the invention adopts a surface micro-texture large-area processing method and device based on a roller electrode, and the method comprises the following steps:
the invention provides a surface micro-texture large-area processing device based on a roller electrode, which is characterized by comprising the following components: the device comprises a control cabinet, a deposition pulse power supply, an upper clamp, an electrode roller, a workpiece, a lower clamp, a supporting device, an auxiliary roller and a liquid supply system;
the auxiliary roller is positioned above the lower clamp and the supporting device, the electrode roller is positioned above the auxiliary roller, the electrode roller is connected with the upper clamp, and a workpiece is placed between the auxiliary roller and the electrode roller; a transmission belt is arranged below the upper clamp; the control cabinet is respectively connected with the deposition pulse power supply 2 and the upper clamp through circuits, and the deposition pulse power supply is respectively connected with the upper clamp and the workpiece through circuits;
transmitting a specified path movement signal to the upper clamp by a control cabinet; the upper clamp starts to move, the control cabinet sends a starting operation signal to the pulse power supply, and the pulse power supply applies a set pulse waveform to the interelectrode; the pulse power supply is connected with the upper clamp and the workpiece to provide current waveforms required by machining.
In the invention, the liquid supply system comprises a liquid purifying tank, a turbid liquid tank, a filter, a one-way quantitative hydraulic pump, a one-way valve, a recovery liquid tank, a first liquid outlet and a second liquid outlet;
the liquid purifying tank is connected with the first liquid outlet and the second liquid outlet sequentially through a filter, a unidirectional quantitative hydraulic pump and a unidirectional valve; the recovery liquid tank is communicated with the turbid liquid tank through a pipeline, and the turbid liquid tank is communicated with the return liquid tank to form a loop;
the electrolyte in the clean liquid tank is filtered by a filter, and enters a first liquid outlet and a second liquid outlet through a one-way valve by a one-way quantitative hydraulic pump;
the redundant electrolyte flows into the recovery liquid tank from the periphery of the workpiece; the recovery liquid tank is connected with the turbid liquid tank through a pipeline; the electrolyte in the turbid liquid tank is pumped back into the clean liquid tank.
In the invention, the electrode roller structure can be a single roller structure or a multi-roller structure. The multi-roller structure is connected through a flexible retainer, and the curvature of the electrode roller arrangement is changed according to different processing surfaces.
In the invention, the multi-roller structure is a flexible electrode roller which is formed by connecting two or more rollers in series, connecting the multi-rollers by adopting a revolute pair, a cylindrical pair and other mechanisms and connecting the multi-rollers through a flexible device.
Preparing a layer of insulating shielding film on the surface of an electrode roller made of metal, and preparing an array pattern which is distributed uniformly with the micro-texture of the surface to be processed on the insulating film, wherein the size and shape of the micro-array pattern are determined by the micro-texture;
the auxiliary roller is made of nonmetallic materials and is used for supporting a workpiece; the electrode roller and the auxiliary roller are driven by a motor to roll relatively, and the workpiece is transported to enter a processing area, so that the whole plane is processed;
the electrode roller is connected with a power anode, the workpiece is connected with a power cathode, and working fluid flows between the cathode and the anode through the fluid supply system;
the length of the workpiece is not limited, and electrochemical deposition occurs on the surface of the workpiece based on the effect of the insulating material shielding electric field, so that large-area cross-scale array micro-texture processing is realized.
In the invention, the rolling mode of the rollers comprises the relative rolling between a single roller structure and a workpiece and the relative rolling between a plurality of roller structures. The relative rolling among the multi-roller structures consists of a plurality of groups of rollers connected in series and a transmission belt; the driving belt and the flexible electrode roller are rigidly connected, and the whole flexible electrode roller is moved by the movement of the driving belt, so that the large-area electrochemical deposition preparation is realized.
In the invention, the surface of the workpiece can be a plane or a curved surface, and the curved surface comprises a cylindrical outer surface, a cylindrical inner surface and a fluctuation surface.
In the invention, the insulating film is made of any one material of ceramics, PDMS, photoresist, a photoetching film or an insulating plate:
wherein the ceramic material is a barium titanate film or a lead titanate film; film forming agents such as PVP, PVA, cellulose derivatives and the like are added into the PDMS material, so that the protective property of the insulating film can be enhanced; the photoresist material is suitable for photoetching of a photoetching machine, and is SU-8; the material of the photoetching film is a photosensitive organic material; the insulating board material is suitable for recycling the array holes, and is resin, plastic and high-molecular polymer.
In the invention, the processing mode of the insulating shielding film comprises mechanical micro-milling, photoetching and laser processing;
in the invention, the method comprises the following steps:
the film is adhered on an electrode roller for processing, or a special resin template is manufactured to replace the film for processing, and the template is not adhered to a workpiece or an electrode;
in the present invention, the array patterns prepared include cylindrical, triangular, rectangular and other more complex shaped structures or any combination of various structures
In the invention, the auxiliary roller is made of materials such as silica gel, rubber, insulating rods, bakelite and the like:
wherein the rubber roller is made of polyurethane or polyethylene; the silica gel roller is made of mSiO 2 ·nH 2 O, vulcanizing the surface; the insulating rod is made of epoxy resin and glass cloth; the material of the bakelite is plastic, phenolic resin, asbestos and saw dust.
In the invention, the electrochemical deposition adopts a voltage amplitude range of 0-36V.
In the invention, the working solution is a mixed solution of different metal agents and additives according to the manufacturing requirements of different metal material microtexture, and the additives comprise H 3 BO 3 、C 12 H 25 SO 4 Na, naCl and NaNO 3 And NaClO 3 Mixed solution of three neutral salt solutions; alternatively, the metallic agent comprises CuSO 4 Other metal salt solutions.
In the invention, the liquid supply form of the electrochemical deposition working liquid comprises a static liquid, an inner flushing liquid and an outer flushing liquid.
In the invention, the device comprises an auxiliary roller and an electrode roller, wherein the middle of the auxiliary roller is used for driving a workpiece, a water inlet and a water outlet are formed in the left side and the right side of the device, and a flushing sealing device is arranged at the position of the water inlet and the water outlet of the workpiece passing through a processing area.
The beneficial effects are that:
(1) The invention adopts a method and a device for processing the surface micro-texture in a large area based on the roller electrode, thereby realizing the processing of the micro-texture on the surface of the workpiece in a large area. The method comprises the steps of carrying out electrochemical deposition by using direct-current voltage under the action of working solution and electrode rollers, continuously processing a workpiece under the action of transmission of rollers by using an electric field action area bound by an insulating film, and adjusting the structure and the curvature of the rollers according to the curvature of the workpiece, so that the method is not limited by the dimension of the workpiece, and large-area, efficient and high-precision processing of the workpiece is realized.
(2) The invention adopts various electrode roller structures, and by utilizing the roller cathode, the processing of the surface micro-textures aiming at different workpiece surfaces and different contours can be realized, namely, the roller structures matched with the workpiece are replaced when the surface curvatures of the workpiece are different, so that the bonding of the electrode roller and the workpiece, the sealing property of an electrochemical deposition area and the integrity of the micro-textures are ensured.
(3) Compared with the mask electrolytic machining technology widely used at present, the invention provides the surface micro-texture large-area machining method and device based on the roller electrode, which do not need the processes of gluing, exposure, development and the like, greatly simplify the machining process and reduce the machining cost.
(4) The invention adopts a pulse power supply for processing, and the relaxation of current/voltage pulse can increase the activation polarization of the cathode and reduce the concentration polarization of the cathode surface so as to improve the density and uniformity of a deposited layer.
(5) The invention is provided with the external flushing device at the front and the back, the high-pressure external flushing ensures that the electrodeposition inner cavity formed by the contact of the roller and the workpiece can be completely filled with the working solution, and in the separation process of the roller and the workpiece, the high-pressure flushing can accelerate the discharge of electrodeposition products such as bubbles and the like.
(6) The invention adopts the roller electrode structure, so that the roller surface mask is in contact with the workpiece at any time, the insulating mask can shield the electric field of a non-processing area, the locality of electrodeposition can be improved, and the high-precision flexible processing of the micro-nano structure is realized.
Drawings
The foregoing and/or other advantages of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings and detailed description.
Fig. 1 is a schematic diagram of the principle of electrochemical deposition on a workpiece surface in sequence in a roll-type electrochemical deposition surface micro-texture large-area processing method provided in the embodiment of the invention.
FIG. 2 is a schematic illustration of the structure of a roll-to-roll electrochemical deposition surface microtextured large area process with individual rolls connected by flexible holders, as provided in the example section of the present invention.
FIG. 3a is a schematic view of an arrangement of inner cylindrical surface processing rollers in a roller-type electrochemical deposition surface microtextured large area processing method according to an embodiment of the present invention.
FIG. 3b is a schematic view of an arrangement of rollers for processing an outer cylindrical surface in a roll-to-roll electrochemical deposition surface micro-textured large area processing method according to the exemplary embodiment of the invention.
FIG. 3c is a schematic view of an arrangement of a corrugated surface processing roller in a method for micro-texturing a large area surface by roller electrochemical deposition according to the present invention.
Fig. 4 is a schematic diagram of a multi-roller connection scheme provided in part by an embodiment of the present invention.
Fig. 5 is a schematic structural view of a processing device applied to a wave-shaped surface part.
Fig. 6 is a schematic structural view of a processing device applied to a large-area micro-processed part according to the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The embodiment of the invention discloses a processing method and a device applied to a large-area micro-machined part, which adopt a surface micro-texture large-area processing method and a device based on a roller electrode.
The embodiment is based on the method and the device for processing the surface of a sheet workpiece by utilizing the brass roller electrode, wherein in the processing process, the curvature of the auxiliary roller is adjusted according to the curvature of the workpiece, then the workpiece is placed at the inlet to be clamped, and the power supply is started.
As shown in fig. 1 and 2, a layer of insulating shielding film 17 is prepared on the surface of the electrode roller 4 made of metal, and then an array pattern which is distributed in accordance with the micro-texture shape of the required processing surface is prepared on the insulating film, wherein the size and shape of the micro-array pattern are determined by the micro-texture, and the array pattern comprises a cylindrical shape, a triangular shape, a rectangular shape and other more complex special-shaped structures or the prepared array pattern is a combination of any multiple structures. The processing mode of the film comprises mechanical micro-milling, photoetching and laser processing. Bonding the film on an electrode roller 4 for processing; or processing by making special resin template instead of film, the template is not adhered to the workpiece or electrode. The electrode roller is attached with films with corresponding micro textures according to the requirements, each film can be reused, the original films do not need to be removed due to the change of the workpiece, and compared with the traditional processing method, the micro texture processing steps are greatly simplified, and the processing efficiency is improved.
Fig. 5 and 6 are schematic diagrams of a method and a device for processing a surface micro-texture large area based on a roller electrode, wherein the method and the device comprise a control cabinet 1, a deposition pulse power supply 2, an upper clamp 3, an electrode roller 4, a workpiece 5, a lower clamp and supporting device 6, an auxiliary roller 7 and a liquid supply system; the auxiliary roller 7 is positioned above the lower clamp and the supporting device 6, the electrode roller 4 is positioned above the auxiliary roller 7, the electrode roller 4 is connected with the upper clamp 3, and the workpiece 5 is placed between the auxiliary roller 7 and the electrode roller 4; the method comprises the steps of carrying out a first treatment on the surface of the A transmission belt 19 is arranged below the upper clamp 3. The electrode roller 4 is connected with a power anode, the workpiece 5 is connected with a power cathode, and working fluid flows between the cathode and the anode through a fluid supply system. The control cabinet 1 is respectively connected with the deposition pulse power supply 2 and the upper clamp 3 through circuits, and the deposition pulse power supply 2 is respectively connected with the upper clamp 3 and the workpiece 5 through circuits; transmitting a specified path movement signal to the upper clamp 3 by the control cabinet 1; the upper clamp 3 starts to move, the control cabinet 1 sends a starting operation signal to the pulse power supply 2, and the pulse power supply applies a set pulse waveform to the interelectrode; a deposition pulse power source 2 is connected to the upper jig 3 and the workpiece 5 to supply a current waveform required for processing. The liquid supply system is started, electrolysis is started under the constraint action of an electric field and a film attached to the electrode roller, the surface of the workpiece starts to generate corresponding micro-textures, when the workpiece completely passes through, the workpiece is cleaned by the electrolytic immersion cleaning liquid, the workpiece is turned over, the steps are repeated on the other surface to process the micro-textures, the curvature of the auxiliary roller can be adjusted according to the surface curvature of the workpiece before each processing, the workpiece can be processed in a large area, and the range of the workable workpiece can be enlarged. The auxiliary roller 7 is made of a nonmetallic material and is used for supporting a workpiece; the electrode roller 4 and the auxiliary roller are driven by a motor to roll relatively, and the workpiece is transported into a processing area, so that the whole plane is processed. The length of the workpiece is not limited, electrochemical deposition sequentially occurs on the surface of the workpiece based on the effect of the insulating material shielding electric field, and large-area cross-scale array micro-texture processing can be realized.
The liquid supply system comprises a liquid purifying tank 13, a turbid liquid tank 14, a filter 8, a one-way quantitative hydraulic pump 9, a one-way valve 10, a recovery liquid tank 11, a first liquid outlet 15 and a second liquid outlet 16. The clean liquid tank 13 is connected with a first liquid outlet 15 and a second liquid outlet 16 sequentially through a filter 8, a one-way quantitative hydraulic pump 9 and a one-way valve 10. The recovery liquid tank 11 is communicated with the turbid liquid tank 14 through a pipeline, and the turbid liquid tank 14 is communicated with the return liquid tank 13 to form a loop. A flushing sealing device is arranged at the first liquid outlet 15 and the second liquid outlet 16 of the workpiece 5 passing through the processing area. The electrolyte in the clean liquid tank 13 is filtered by the filter 8, and enters the first liquid outlet 15 and the second liquid outlet 16 through the one-way valve 10 by the one-way quantitative hydraulic pump 9. Excess electrolyte flows from around the workpiece 5 into the recovery tank 11. The recovery liquid tank 11 is connected with the turbid liquid tank 14 through a pipeline; the electrolyte in the turbid liquid tank 14 is pumped back into the clean liquid tank 13.
In the method and the device for processing the surface micro-texture large area based on the roller electrode according to the embodiment, the rolling mode of the roller comprises relative rolling between a single roller structure and a workpiece and relative rolling between multiple roller structures. The relative rolling between the multi-roller structures is composed of a plurality of groups of rollers connected in series and a driving belt. The driving belt and the flexible electrode roller are rigidly connected, and the whole flexible electrode roller is moved by the movement of the driving belt, so that the large-area electrochemical deposition preparation is realized.
As shown in fig. 4, the multi-roller structure is that two or more rollers are connected in series, and the multi-rollers are connected by adopting a flexible device revolute pair and a cylindrical pair 18 to form a flexible electrode roller 4 for processing a curved surface workpiece.
In the method and the device for processing the surface micro-texture large area based on the roller electrode according to the embodiment, the electrode roller 4 can be of a single roller structure or a multi-roller structure; the multiple roll structures are connected through a flexible retainer, and the curvature of the arrangement of the electrode rolls 4 is changed according to different processing surfaces. The surface of the workpiece 5 shown in fig. 3 may be planar or curved, including a cylindrical outer surface, a cylindrical inner surface, and a undulating surface. Fig. 3a is a schematic view of the arrangement of the processing rollers with the workpiece 5 being an inner cylindrical surface, comprising a cylindrical inner surface workpiece, a multi-roller electrode, a lower clamp and support means 6. Fig. 3b is a schematic view of the arrangement of the processing rollers with the workpiece 5 being an outer cylindrical surface, comprising a cylindrical outer surface workpiece, a multi-roller electrode, a lower fixture and a support means 6. Fig. 3c is a schematic view of a processing roller arrangement for a work piece 5 having a wave-shaped surface, comprising a wave-shaped surface work piece multi-roller electrode, a lower clamp and a support means 6.
In the method and the device for processing the surface micro-texture large area based on the roller electrode, the film is made of any one material of ceramics, PDMS, photoresist, a photoetching film or an insulating plate: wherein the ceramic material is a barium titanate film or a lead titanate film; film forming agents such as PVP, PVA, cellulose derivatives and the like are added into the PDMS material, so that the protective property of the insulating film can be enhanced; the material of the photoresist is suitable for photoetching of a photoetching machine, and the material of the photoresist is SU-8; the material of the photoetching film is a photosensitive organic material; the insulating plate material is suitable for recycling the array holes, and is resin, plastic and high-molecular polymer.
In the method and the device for processing the surface micro-texture large area based on the roller electrode according to the embodiment, the auxiliary roller 7 is made of materials such as silica gel, rubber, insulating rods, bakelite and the like: wherein the rubber roller is made of polyurethane or polyethylene; the silica gel roller is made of mSiO 2 ·nH 2 O, vulcanizing the surface; the insulating rod is made of epoxy resin and glass cloth; the material of the bakelite is plastic, phenolic resin, asbestos and saw dust.
In the method and the device for processing the surface micro-texture large area based on the roller electrode, the voltage amplitude range adopted by the electrochemical deposition is 0-36V.
In the method and the device for processing the surface micro-texture large area based on the roller electrode, the working solution is a mixed solution of different metal agents and additives according to the manufacturing requirements of the micro-textures of different metal materials, and the additives comprise H 3 BO 3 、C 12 H 25 SO 4 Na, naCl and NaNO 3 And NaClO 3 Mixed solution of three neutral salt solutions; alternatively, the metallic agent comprises CuSO 4 Other metal salt solutions. The liquid supply form of the electrochemical deposition working liquid comprises a static liquid, an inner flushing liquid and an outer flushing liquid.
In order to realize efficient, stable and high-precision processing, the scheme innovation provides a surface micro-texture large-area processing method and device based on the roller electrode, and the universality of roller electrode processing is utilized, so that the traditional static micro-texture processing mode is changed, and the purpose of processing the micro-texture in a large area without being limited to the dimension of a workpiece is realized.
The invention provides a method and a device for processing a surface micro-texture large area based on a roller electrode, and the method and the device for realizing the technical scheme are a plurality of methods and ways, and the method and the device are only preferred embodiments of the invention, and it should be pointed out that a plurality of improvements and modifications can be made by a person with ordinary skill in the art without departing from the principle of the invention, and the improvements and the modifications are also regarded as the protection scope of the invention. The components not explicitly described in this embodiment can be implemented by using the prior art.
Claims (7)
1. A roll electrode-based surface microtextured large-area processing device, comprising: the device comprises a control cabinet (1), a deposition pulse power supply (2), an upper clamp (3), an electrode roller (4), a lower clamp and a supporting device (6), an auxiliary roller (7) and a liquid supply system;
the auxiliary roller (7) is positioned above the lower clamp and the supporting device (6), the electrode roller (4) is positioned above the auxiliary roller (7), the electrode roller (4) is connected with the upper clamp (3), and a workpiece (5) to be processed is placed between the auxiliary roller (7) and the electrode roller (4);
the control cabinet (1) is respectively connected with the deposition pulse power supply (2) and the upper clamp (3) through circuits, and the deposition pulse power supply (2) is respectively connected with the upper clamp (3) and the workpiece (5) through circuits;
a control cabinet (1) sends a specified path moving signal to an upper clamp (3); the upper clamp (3) starts to move, the control cabinet (1) sends a starting operation signal to the deposition pulse power supply (2), and the pulse power supply applies a set pulse waveform to the interelectrode; the deposition pulse power supply (2) is connected with the upper clamp (3) and the workpiece (5) to provide current waveforms required by processing;
the surface of the workpiece is a curved surface;
the electrode roller (4) is connected with a power anode, and the workpiece (5) is connected with a power cathode;
the structure of the electrode roller (4) is a multi-roller structure; the multi-roller structure is characterized in that two or more rollers are connected in series, and the multi-rollers are connected through a flexible device (18) to form a flexible electrode roller (4) for processing a curved surface workpiece; the flexible device (18) adopts a revolute pair or a cylindrical pair mechanism;
an insulating shielding film (17) is attached to the surface of the electrode roller (4), and the insulating shielding film (17) is provided with an array pattern which is consistent with the micro-texture distribution of the required processing surface;
the electrode roller (4) and the auxiliary roller are driven by a motor to roll relatively in a follow-up mode, and a workpiece is transported to enter a processing area; the rolling mode of the roller comprises the following steps: relative rolling between the single roller structure and the workpiece (5), and between the multiple roller structures;
a transmission belt (19) is arranged below the upper clamp (3); the relative rolling among the multi-roller structures consists of a plurality of groups of rollers connected in series and a transmission belt (19); the driving belt and the flexible electrode roller (4) are rigidly connected, and the whole flexible electrode roller is moved by the movement of the driving belt, so that the large-area electrochemical deposition preparation is realized.
2. The roll electrode-based surface microtextured large-area processing device of claim 1, wherein the liquid supply system comprises a clean liquid tank (13), a turbid liquid tank (14), a filter (8), a one-way quantitative hydraulic pump (9), a one-way valve (10), a recovery liquid tank (11), a first liquid outlet (15) and a second liquid outlet (16);
the liquid purifying tank (13) is connected with the first liquid outlet (15) and the second liquid outlet (16) sequentially through the filter (8), the unidirectional quantitative hydraulic pump (9) and the unidirectional valve (10); the recovery liquid tank (11) is communicated with the turbid liquid tank (14) through a pipeline, and the turbid liquid tank (14) is communicated with the return liquid tank (13) to form a loop;
the electrolyte in the clean liquid tank (13) is filtered by a filter (8), and enters a first liquid outlet (15) and a second liquid outlet (16) through a one-way valve (10) by a one-way quantitative hydraulic pump (9);
the excess electrolyte flows into the recovery liquid tank (11) from the periphery of the workpiece (5); the recovery liquid tank (11) is connected with the turbid liquid tank (14) through a pipeline; the electrolyte in the turbid liquid tank (14) is pumped back into the clean liquid tank (13).
3. The method for processing the surface micro-texture large area based on the roller electrode is implemented by adopting the device for processing the surface micro-texture large area based on the roller electrode according to claim 2, and is characterized by comprising the following steps:
firstly, preparing a layer of insulating shielding film (17) on the surface of an electrode roller (4) made of metal, wherein the electrode roller (4) is movable;
step two, the electrode roller (4) is connected with a power anode, a workpiece is connected with a power cathode, and working fluid flows between the cathode and the anode through a fluid supply system; the liquid flushing mode of the liquid supply system is that the first liquid outlet (15) and the second liquid outlet (16) move with the roller in a follow-up way;
step three, the electrode roller (4) and the auxiliary roller are driven by a motor to roll relatively in a follow-up mode, and a workpiece is transported to enter a processing area;
and fourthly, preparing an array pattern which is consistent with the micro-texture distribution of the required processing surface on the insulating shielding film.
4. A roll electrode-based surface microtextured large-area machining method according to claim 3, characterized in that the auxiliary roll (7) is fitted to the curved surface of the workpiece, which is brought into the machining zone by friction forces generated by the rotation of the electrode roll (4) and the single roll of the auxiliary roll.
5. The roll electrode-based surface microtextured large-area process of claim 4, wherein the liquid supply system operating method comprises: static liquid, inner flushing liquid and outer flushing liquid;
the hydrostatic method is that electrolyte does not flow and always fills a processing area between the electrode roller (4) and the workpiece to carry out electrochemical deposition processing;
the inner flushing method is that electrolyte is pumped into a processing area between the electrode roller (4) and a workpiece from the inside of the electrode roller (4) to perform electrochemical deposition processing;
the external flushing method is that electrolyte is pumped into the surface of a workpiece or the surface of an electrode roller (4) from the outside, and is brought into a processing area between the electrode roller (4) and the workpiece through the rolling of the electrode roller (4) to perform electrochemical deposition processing.
6. The roll electrode-based surface microtextured large-area processing method of claim 5, wherein the insulating shielding film is attached to an electrode roll (4) to process a workpiece; the preparation method of the insulating shielding film comprises mechanical micro-milling, photoetching, laser processing or 3D printing.
7. The roll electrode-based surface microtextured large-area machining method of claim 6, wherein the workpiece surface comprises a cylindrical outer surface, a cylindrical inner surface, or a conical surface; the prepared array pattern includes a cylindrical shape, a triangular shape or a rectangular shape.
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