CN104195605B - The method of the fine plating repairing mould surface defect in gel media local - Google Patents
The method of the fine plating repairing mould surface defect in gel media local Download PDFInfo
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- CN104195605B CN104195605B CN201410377264.9A CN201410377264A CN104195605B CN 104195605 B CN104195605 B CN 104195605B CN 201410377264 A CN201410377264 A CN 201410377264A CN 104195605 B CN104195605 B CN 104195605B
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Abstract
The method that the present invention relates to the fine plating repairing mould surface defect in a kind of gel media local.Particularly as follows: treatment before plating, including removing flash removed, die surface cleaning processes, roughening treatment and activation processing；Electroplating processes, including. preparation plating bath gel.Use automatic electroplating to process or receive and distribute galvanic electricity plating processing and carry out electroplating processes；After completing plating processing, need die surface is carried out, use dilute sulfuric acid concentration solution within 5g/mL to be carried out.The present invention intends with the gel parcel instrument anode comprising electrolyte corresponding to mould, workpiece is as negative electrode, carry out plating processing, it is particularly well-suited to the discreet region of die surface, conversion zone controls because electrolyte is adsorbed by gel space network structure, mould not broken (mill) will not be damaged district and be processed.Achieve the accurate reparation of the defect of die surface.
Description
Technical field
The invention mainly relates to Surface Engineering and method that the fine electroplating technology field remanufactured is specifically related to the fine plating repairing mould surface defect in a kind of gel media local.
Background technology
Mould is widely used in industry processes, main by External Force Acting, makes blank become the instrument of the product having given shape and size, has the title of " mothers of all trades ".But, mould in use inevitably all can produce breakage or abrasion.The machining accuracy reducing mould is all even directly resulted in the inefficacy of mould by these breakages or abrasion.Processed by a series of heat treatment, surface or add coating and can effectively extend the mold use life-span.Cause the mould lost efficacy at present without good reparation means for the breakage having resulted in or abrasion mould.Electroplating technology is widely used in anticorrosion, improves the purpose such as performance and decoration.Particularly for Brush Plating, it is also possible to for workpiece size can also be changed, improve mechanical engagement, repair because of workpiece etc. that is overproof or that scrap because of abrasion.But Brush Plating cannot be repaired for the surface at right angle, it is impossible to carry out fine plating processing.
Summary of the invention
The method that it is an object of the invention to provide the fine plating repairing mould surface defect in a kind of gel media local.Aim to solve the problem that broken (mill) being produced due to processing on the mold surface by novel gel fine electric plating method reparation damages region, control plating machining area by gel adsorption electrolyte solution and damage district for broken (mill), improve the accuracy of machining area, it is ensured that not broken (mill) damages original processing dimension and the mechanical performance in region.
The method of the fine plating repairing mould surface defect in gel media local that the present invention proposes, specifically comprises the following steps that
(1). treatment before plating
(1.1) remove flash removed, before reparation, go through whether damage zone exists tiny burr, if there is removing the most in time, otherwise can affect the quality of processing.Burr is removed and is used 200～No. 400 waterproof abrasive papers to be polished by die surface；
(1.2). die surface cleaning processes, it is cleaned die surface when electroless plating reaction processing, die surface is carried out by the mixed solution using concentration to be 20% sulphuric acid and pickling accelerator 5%, then uses washing, washes away all of cleanout fluid in surface；
(1.3). roughening treatment and activation processing, use the method for electrochemical etching to be performed etching by mould finished surface, generate surface and produce the surface of rough micro-rough band activity；
(2). electroplating processes
(2.1). preparation plating bath gel.The electroplating electrolytes using concentrated sulphuric acid, sodium hydroxide, formaldehyde and correspondence is configured to electroplate working fluid, and concentrated sulphuric acid concentration is 5g/L, and sodium hydroxide is 10g/L, and concentration of formaldehyde is 5 ~ 10ml/L, and corresponding electroplating electrolytes concentration is 30g/L；Particularly, for the plating of inert metal, it may not be necessary to add concentrated sulphuric acid, sodium hydroxide and formaldehyde；Then plating working fluid, dimethylacetoacetamide (DMAA), clay, light trigger mix homogeneously are placed in the mould preparing gel, by the irradiation of ultraviolet light, it is thus achieved that the electrolyte gel of good molding；Wherein: dimethylacetoacetamide (DMAA), clay and light trigger press the mass ratio mixing of 75:24:1, plating working fluid is 1:1-5:1 with the mass ratio of dimethylacetoacetamide, clay and light trigger gross mass sum；
(2.2). described electroplating processes process uses processing automatically, or this manually processed process；
Automatic electroplating is processed, its system of processing is controlled device by controller, power control, power supply, instrument anode and machine tool motion and forms, the gel prepared is installed on instrument anode, instrument anode is installed on below machine tool chief axis, power supply positive and negative electrode connects workpiece to be machined and instrument anode respectively, open controller, according to feedback signal and program, controller requires that controlling device to machine tool motion sends motion control signal, controls workpiece to be machined and instrument anode relative motion；Machine tool motion controls device and controls machine tool chief axis and the motion of workbench, and workbench controls the X of workpiece to be machined, the motion of Y-direction, and machine tool chief axis controls the relative motion of instrument anode；The mutual motion of gel and finished surface is completed by the motion of work platforms and machine tool chief axis；Controller requires to send machining control signal to power control according to program simultaneously, by the upper electric control process time between workpiece to be machined and instrument anode；
For manually electroplating processing, the gel prepared is installed with on the instrument anode of manually processing handle, instrument anode and workpiece to be machined are connected to respectively positive pole and the negative pole of power supply；After checking the wiring correctly of hand gear, power-on；Processing staff's hand-held processing handle, it is ensured that gel contacts with workpiece to be machined surface, controls relative motion correct between gel and surface to be machined, is processed；
(3). plating posttreatment
After completing plating processing, need die surface is carried out, use dilute sulfuric acid (concentration is within 5g/mL) solution to be carried out.Then thickness and intensity to plating check.
In the present invention, described instrument anode uses graphite rod (or platinum alloy) processing end parcel gel, and non-machining area is coated with insulating protective layer, is operated manually by holding handle, simple and convenient easy.
In the present invention, electroplating electrolytes corresponding during copper facing uses copper sulfate.
Electrolyte medium in the present invention is the gel adsorbing specific electrolyte solution, largely decreases the amount of tradition plating fabrication cycles electrolyte solution, meets green processing objective.Meanwhile, the thickness that can pass through gel effectively control the speed of processing, reduces tradition processing due to what gap was caused and processes failed appearance situation.
The present invention uses the size changing voltage control the speed of process velocity, reach fine plating Repair gene efficiency and the complex optimum of crudy by the adjustment of process velocity, complete tiny gels plating with rational process velocity and repair.
The present invention tentatively completes fine plating Repair gene, is needing the mould after repairing is tested, for checking qualified mould, then the gel of processing should carry out heavy metal ion harmless treatment, is then uniformly processed.Mould for disqualified upon inspection, it should return and proceed to process again.
In the present invention in the course of processing, cation (metal cation) concentration in the electrolyte solution that gel is adsorbed can be gradually lowered along with the carrying out of processing, in order to ensure rationally carrying out of processing, needs to be timed supplementary to the electrolyte solution in gel.
Accompanying drawing explanation
Fig. 1 is gel preparation engineering schematic diagram.
Fig. 2 is manual machining sketch chart.
Fig. 3 is automatic processing system manuscript.
Fig. 4 is manual processing unit (plant) 3D illustraton of model.
Label in figure: 1 is machine tool chief axis, 2 is instrument anode, and 3 is insulating protective layer; 4 is gel, and 5 is workpiece to be machined, and 6 is system of processing workbench; 7 is power control, and 8 is power supply, and 9 is controller; 10 control device for machine tool motion, and 11 is processing handle, and 12 is process support frame; 13 prepare die for gel; punch prepared by 14 gels, and 15 is electrolyte solution, and 16 is gel solution.
Detailed description of the invention
The present invention is to process by plating process principle and Surface Engineering, is described in detail the present invention program below in conjunction with the accompanying drawings.General step for the present invention is: pretreatment, the preparation of gel, rationally selects automatic or manual processing mode, building of processing platform, plating processing and post processing.Wherein gel preparation, build automatic processing platform and plating processing is the core content of the present invention.
Embodiment 1: before carrying out plating processing, be required for carrying out treatment before plating, mainly remove the small burr of part finished surface, the cleaning completing mould finished surface processes.Particularly, difficult plating needs extra increase roughening treatment and activation processing.
The electrolyte solution carrier of the present invention is gel; preparation has good electrical conductivity; the method of the gel of solid shape is as shown in Figure 1; by correspondence electrolyte (such as copper sulfate) (mass fraction is about 4%), dimethylacetoacetamide DMAA(20%), clay (6%) and light trigger DEAP(0.25%) uniformly mix with water; obtain the gel solution 16 of clear; the solution obtained is placed in female die of die part 13, then the gel of mould is prepared punch 14 and fix.The whole device obtained is positioned under uviol lamp, carries out polyreaction 45min and finally obtain the gel 4 required for experiment.
Simple for machining shape, that processing capacity is few (less than 2g), such as: processing cross sectional shape is point or small-diameter circular (diameter is less than 2mm), can directly use manual cooked mode to be processed.For complex-shaped, processing capacity many (more than 2g), general employing machine automatization system of processing is processed.
For manual cooked mode, the stability that reliability, manually-operated convenience and the electrolyte solution that gel is installed supplements is required for being achieved by electrode assembly.As shown in Figure 4, mainly by processing handle 11, process support frame 12, electrolyte solution 15, gel solids 4, instrument anode 2 and insulation protection 3 form.
Manual processing unit (plant) is as in figure 2 it is shown, manually process and be mainly made up of power supply 8, workpiece to be machined 5 and manual machined electrode device.Add man-hour, manual machined electrode device and workpiece to be machined 5 are connect respectively positive pole and the negative pole of power supply 8.In the case of checking that wiring is correct, switch on power.The processing handle 11 of the hand-held electrode assembly of operator, contacts the machined surface on workpiece to be machined 5 by gel 4, and process support frame 12 is fixed to support on seat (without supporting seat, the most hand-held).There is electrochemical reaction in the closed-loop path being made up of power supply 8, instrument anode 2, electrolyte solution 15, gel 4 and workpiece to be machined 5, it is achieved plating processing.Insulating protective layer 2 controls the contact surface of instrument anode and gel.Operator control gel motion on machined surface by processing handle 11 and process support frame 12, complete plating processing.
As it is shown on figure 3, automatic processing system is mainly controlled device 10 formed by controller 9, power control 7, power supply 8, instrument anode 2, machine tool motion.Gel 4 is installed on instrument anode 2, the both positive and negative polarity of power supply 8 connect respectively workpiece to be machined 5 and and instrument anode 2, after checking that wiring is correct, open controller 9.Controlled device 7 by the software automatic control power supply on controller 9 and machine tool motion controls device 10.The break-make of power supply 8 is controlled, it is achieved the control to process time by power control 7；Control device 10 by machine tool motion and control machine tool chief axis 1 and the motion of workbench 6, it is achieved the auto-feed of whole system of processing and self-acting feed.There is electrochemical reaction in the closed-loop path being made up of power supply 8, instrument anode 2, electrolyte solution 15, gel 4 and workpiece to be machined 5, it is achieved plating processing.
After completing plating processing, need die surface is carried out then thickness and intensity to plating and check.Meet requirement of strength, then complete the processing of the fine plating repairing mould surface defect in gel media local.
Claims (3)
1. the method for the fine plating repairing mould surface defect in gel media local, it is characterised in that specifically comprise the following steps that
(1). treatment before plating
(1.1) removing flash removed, go through whether damage zone exists tiny burr before reparation, if there is removing the most in time, burr is removed and is used 200～No. 400 waterproof abrasive papers to be polished by die surface；
(1.2). die surface cleaning processes, it is cleaned die surface when electroless plating reaction processing, die surface is carried out by the mixed solution using concentration to be 20% sulphuric acid and pickling accelerator 5%, then uses washing, washes away all of cleanout fluid in surface；
(1.3). roughening treatment and activation processing, use the method for electrochemical etching to be performed etching by mould finished surface, generate surface and produce the surface of rough micro-rough band activity；
(2). electroplating processes
(2.1). preparation plating bath gel；The electroplating electrolytes using concentrated sulphuric acid, sodium hydroxide, formaldehyde and correspondence is configured to electroplate working fluid, and concentrated sulphuric acid concentration is 5g/L, and sodium hydroxide is 10g/L, and concentration of formaldehyde is 5 ~ 10ml/L, and corresponding electroplating electrolytes concentration is 30g/L；Particularly, for the plating of inert metal, it is not necessary to add concentrated sulphuric acid, sodium hydroxide and formaldehyde；Then plating working fluid, dimethylacetoacetamide, clay, light trigger mix homogeneously are placed in the mould preparing gel, by the irradiation of ultraviolet light, it is thus achieved that the electrolyte gel of good molding；Wherein: dimethylacetoacetamide, clay and light trigger press the mass ratio mixing of 75:24:1, plating working fluid is 1:1-5:1 with the mass ratio of dimethylacetoacetamide, clay and light trigger gross mass sum；
(2.2). described electroplating processes process uses automatic electroplating processing or receives and distributes galvanic electricity plating processed；
Automatic electroplating is processed, its system of processing is controlled device by controller, power control, power supply, instrument anode and machine tool motion and forms, the gel prepared is installed on instrument anode, instrument anode is installed on below machine tool chief axis, power supply positive and negative electrode connects workpiece to be machined and instrument anode respectively, open controller, according to feedback signal and program, controller requires that controlling device to machine tool motion sends motion control signal, controls workpiece to be machined and instrument anode relative motion；Machine tool motion controls device and controls machine tool chief axis and the motion of workbench, and workbench controls the X of workpiece to be machined, the motion of Y-direction, and machine tool chief axis controls the relative motion of instrument anode；The mutual motion of gel and finished surface is completed by the motion of work platforms and machine tool chief axis；Controller requires to send machining control signal to power control according to program simultaneously, by the upper electric control process time between workpiece to be machined and instrument anode；
For manually electroplating processing, the gel prepared is installed on the instrument anode of manually processing handle, instrument anode and workpiece to be machined are connected to respectively positive pole and the negative pole of power supply；After checking the wiring correctly of hand gear, power-on；Processing staff's hand-held processing handle, it is ensured that gel contacts with workpiece to be machined surface, controls relative motion correct between gel and surface to be machined, is processed；
(3). plating posttreatment
After completing plating processing, needing to be carried out die surface, use dilute sulfuric acid concentration solution within 5g/mL to be carried out, then thickness and intensity to plating check.
The method of the fine plating repairing mould surface defect in gel media the most according to claim 1 local, it is characterised in that described instrument anode uses graphite rod or platinum alloy processing end parcel gel, and non-machining area is coated with insulating protective layer.
The method of the fine plating repairing mould surface defect in gel media the most according to claim 1 local, it is characterised in that electroplating electrolytes corresponding during copper facing uses copper sulfate.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834844A (en) * | 1987-05-26 | 1989-05-30 | Hoechst Aktiengesellschaft | Process for the selective additive correction of voids in copying layers |
| CN101270494A (en) * | 2008-05-08 | 2008-09-24 | 重庆大学 | Galvano-chemistry preparation method for metallic face protection ceramic film |
| CN103737130A (en) * | 2013-12-03 | 2014-04-23 | 同济大学 | Electrochemical deburring and surface processing method through gel-state electric brush |
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| JP5382797B2 (en) * | 2009-09-30 | 2014-01-08 | 独立行政法人産業技術総合研究所 | Method for manufacturing structure by electrochemical reaction using conductive composition |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4834844A (en) * | 1987-05-26 | 1989-05-30 | Hoechst Aktiengesellschaft | Process for the selective additive correction of voids in copying layers |
| CN101270494A (en) * | 2008-05-08 | 2008-09-24 | 重庆大学 | Galvano-chemistry preparation method for metallic face protection ceramic film |
| CN103737130A (en) * | 2013-12-03 | 2014-04-23 | 同济大学 | Electrochemical deburring and surface processing method through gel-state electric brush |
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