CN102943294B - A kind of large-scale ball size chrome-plating device - Google Patents
A kind of large-scale ball size chrome-plating device Download PDFInfo
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- CN102943294B CN102943294B CN201210459242.8A CN201210459242A CN102943294B CN 102943294 B CN102943294 B CN 102943294B CN 201210459242 A CN201210459242 A CN 201210459242A CN 102943294 B CN102943294 B CN 102943294B
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Abstract
A kind of large-scale ball size chrome-plating device, comprise conformal anode, clip and anode fixed part, described conformal anode is fixedly connected with clip by anode fixed part, described conformal anode comprises many anode straps, many anode straps surround a spherical cage structure corresponding with spheroid to be plated, and are formed with anode strap gap between adjacent anode bar; The bottom of described anode strap is arranged along same lower circumference, and the top of described anode strap is arranged along same top circumference, and top circumference is fixedly connected with the bottom of anode fixed part; During use, its using method comprises chromium plating liquid blending process, trade union college technique, energising chrome-plated process and goes out groove dismounting technique.The present invention to the overall chromium plating of ball-end parts, and can not only can finely control thickness and the degree of uniformity of layers of chrome, reaches the effect without the need to mechanical workout after bulb chromium plating.
Description
Technical field
The present invention relates to a kind of electroplating technology, particularly relate to a kind of large-scale ball size chrome-plating device, be specifically applicable to the high precision chromium plating of ball-type part.
Background technology
When workpiece configurations to be plated is spheroid, its radius-of-curvature is large, causes spherical cambered surface layers of chrome sedimentation velocity difference comparatively large, is difficult to the uniformity requirement meeting spherical cambered surface chromium coating thickness, and causing domesticly also does not have producer can the large-scale ball-end parts of production high precision chromium plating.
China Patent No. is the chrome-plating method that the patent of invention of ZL200810197112.5 discloses a kind of spherical crown surface of major diameter spherical crown workpiece, the method is entering in groove positioning step, the decoration form of change anode strap or positive plate or structure are to coordinate workpiece to be plated, in chromium plating step, first bath temperature 70 – 75 degrees Celsius, plate milky white chromium under current density 20 – 25 pacifies every square decimeter of condition, then bath temperature 50 – 55 degrees Celsius, current density 25 – 30 pacifies hard chrome plating under every square decimeter of condition.Although this invention can carry out chromium plating process to spherical crown workpiece surface, it still has following deficiency:
1, this invention is only applicable to the less spherical crown part of ball radian, is not suitable for ball-end parts;
2, the anode in this invention and workpiece are installed at twice and are located in chrome-plating bath, install after fixing, cannot check the relative position between anode and workpiece, and after causing plating, layers of chrome is uneven, affects layers of chrome precision.
Summary of the invention
The object of the invention is to overcome can not to ball-nosed solid chromium plating in prior art, the defect of wayward layers of chrome degree of uniformity, proposes a kind of large-scale ball size chrome-plating device that can carry out overall chromium plating, precise controlling layers of chrome uniformity coefficient to ball-end parts entirety.
For realizing above object, technical solution of the present invention is:
A kind of large-scale ball size chrome-plating device, comprise conformal anode and anode fixed part, described conformal anode is fixedly connected with by anode fixed part one end with anode conducting plate, and the other end of anode conducting plate is connected with power supply by conducting copper;
Described conformal anode comprises many anode straps, and many anode straps surround a ball-type cage structure corresponding with spheroid to be plated, and spheroid to be plated is positioned at the inside of described ball-type cage structure, and is formed with anode strap gap between adjacent anode bar; The bottom of described anode strap is arranged along same lower circumference, and the top of described anode strap is arranged along same top circumference, and top circumference is fixedly connected with the bottom of anode fixed part.
Described anode strap comprises interconnective long arc sheet and arc sheet tip, and the top of long arc sheet is positioned in top circumference, and the bottom of long arc sheet is fixedly connected with the top of arc sheet tip, and the bottom of arc sheet tip is positioned on lower circumference; The width of described long arc sheet is equal with the top width of arc sheet tip, and the top width of described arc sheet tip is greater than the bottom width of arc sheet tip.
The quantity of described anode strap is at least four, and the bottom of described anode strap is evenly arranged along same lower circumference, and the top of described anode strap is evenly arranged along same top circumference.
Described anode fixed part comprises left anode fixed part and right anode fixed part, the shape of described left anode fixed part, right anode fixed part is consistent, left anode fixed part matches with right anode fixed part and surrounds cylinder-like structure, and the bottom of described cylinder-like structure is fixedly connected with top circumference;
Described left anode fixed part is evenly provided with at least two left anode fixed orificess, right anode fixed part is evenly provided with at least two right anode fixed orificess.
Described chrome-plating device also comprises clip, and described clip comprises left clip and right clip;
Described left clip comprises left clip body, left clip first connection section and left clip second connection section, described left clip body is semi-annular shape, the middle part of left clip body is evenly provided with the left clip positioning screw hole matched with left anode fixed orifices, the two ends of left clip body are fixedly connected with left clip first connection section, left clip second connection section respectively, left clip first connection section is provided with left clip first connecting hole, left clip second connection section is provided with left clip second connecting hole;
Described right clip comprises right clip body, right clip first connection section and right clip second connection section, described right clip body is semi-annular shape, the middle part of right clip body is evenly provided with the right clip positioning screw hole matched with right anode fixed orifices, the two ends of right clip body are fixedly connected with right clip first connection section, right clip second connection section respectively, right clip first connection section is provided with right clip first connecting hole, right clip second connection section is provided with right clip second connecting hole;
Described left clip first connecting hole is corresponding with right clip first connecting hole to be arranged, and described left clip second connecting hole is corresponding with right clip second connecting hole to be arranged.
The top of described spheroid to be plated is provided with the positioning linkage rod corresponding with anode fixed part.
The bottom of described spheroid to be plated is provided with flange connecting rod and ring flange, the top of described flange connecting rod is fixedly connected with the bottom of spheroid to be plated, the bottom of flange connecting rod is connected with the plan vertical of ring flange, and the top planes of ring flange and lower circumference place plane coincide.
Described conformal anode, anode fixed part all adopt lead, lead antimony alloy or terne metal manufacture.
The radius of described spheroid to be plated is more than or equal to 150 millimeters.
The radius of described spheroid to be plated is 150 – 300 millimeters, and the radius of described conformal anode is 230 – 410 millimeters, and the radius of described conformal anode is the radius of the ball-type cage structure of multiple anode strip composition.
Compared with prior art, beneficial effect of the present invention is:
1, the chrome-plating device adopted in a kind of large-scale ball size chrome-plating device of the present invention comprises conformal anode, described conformal anode comprises many anode straps, many anode straps surround a ball-type cage structure corresponding with spheroid to be plated, spheroid to be plated is positioned at the inside of described ball-type cage structure, and is formed with anode strap gap between adjacent anode bar; The bottom of described anode strap is arranged along same lower circumference, the top of anode strap is arranged along same top circumference, and top circumference is fixedly connected with the bottom of anode fixed part, during use, conformal anode can close with the matching form of spheroid to be plated, thus overcomes the defect that the sphere curvature radius that exists in prior art is large, layers of chrome sedimentation velocity difference is large, guarantee spherome surface distribution of current to be plated evenly, thus improve layers of chrome uniformity coefficient, and then realize high precision chromium plating.Therefore, the conformal anode in the present invention can close with the matching form of spheroid to be plated, can improve the homogeneity of coating distribution, realize high precision chromium plating.
2, the chrome-plating device adopted in a kind of large-scale ball size chrome-plating device of the present invention comprises anode fixed part and clip, anode fixed part matches with clip, the portion that is fixed that locked clip device is connected with spheroid to be plated, anode fixed part is fixed on clip, spheroid to be plated is made to be fixed on the position, center of conformal anode inside, when installing workpiece to be plated, can by regulating anode fixed part accurately to control the relative position between spheroid to be plated and conformal anode, in addition, conformal anode is by anode fixed part, clip is fixed on after on workpiece to be plated, when mobile workpiece to be plated enters chrome-plating bath, conformal anode position not easily offsets, the relative position between spheroid to be plated and conformal anode can be guaranteed, thus guarantee accuracy and the homogeneity of plating.Therefore, the present invention is not only easy to adjust the relative position between conformal anode and spheroid to be plated, and can guarantee conformal anode fix after stability.
3, the chrome-plating device adopted in a kind of large-scale ball size chrome-plating device of the present invention is in use: in the plating chromic electrolyte of preparation, the content of each composition is: chromic anhydride 180 – 220g/L, sulfuric acid 1.8 – 2.2g/L, trivalent chromium 2 – 4g/L, iron contamination≤5g/L, and the content of chromic anhydride is 80 – 100 times of sulfuric acid; This programme reduces the concentration range of chromic anhydride and sulfuric acid, reduces the impact of concentration difference on chromium coating thickness, thus improves the dimensional precision at chromium plating position.Therefore, chromium plating size of the present invention is more accurate.
4, the chrome-plating device adopted in a kind of large-scale ball size chrome-plating device of the present invention is in use: adopt and first plate milky white chromium, chromed hardened method again, strict control Cr-plating Bath temperature, anode for chrome-plating current densities and chromium plating time, guarantee that layers of chrome is careful, thickness is even, glossy degree well.Therefore, the present invention can accurately control chromium plating condition, and careful, even, the glossy degree of layers of chrome well.
5, the chrome-plating device adopted in a kind of large-scale ball size chrome-plating device of the present invention is in use: carry out pre-treatment to conformal anode, spheroid to be plated, this manipulation require cleaning conformal anode is to seeing its metal true qualities, to get rid of the impurity interference plating on conformal anode, affect electroplating effect; Remove the defect of corrosion on spheroid to be plated, pit or exoncoma, in order to avoid affect spherome surface chromium coating effect to be plated.Therefore, pretreatment technology of the present invention can get rid of conformal anode, Surface Flaw to be plated to the impact of electroplating effect, can realize high precision chromium plating.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the structural representation of conformal anode in Fig. 1.
Fig. 4 is the plane outspread drawing of conformal anode in Fig. 1.
Fig. 5 is the structural representation of clip in Fig. 1.
Fig. 6 is the structural representation of left clip in Fig. 5.
Fig. 7 is the structural representation of embodiment 3 in the present invention.
Fig. 8 is the structural representation of workpiece to be plated in Fig. 7.
In figure: conformal anode 1, anode strap 2, anode strap gap 21, top circumference 22, lower circumference 23, long arc sheet 24, arc sheet tip 25, anode fixed part 3, left anode fixed part 31, left anode fixed orifices 32, right anode fixed part 33, right anode fixed orifices 34, clip 4, left clip 5, left clip first connection section 51, left clip second connection section 52, left clip body 53, left clip positioning screw hole 54, left clip first connecting hole 55, left clip second connecting hole 56, right clip 6, right clip first connection section 61, right clip second connection section 62, right clip body 63, right clip positioning screw hole 64, right clip first connecting hole 65, right clip second connecting hole 66, spheroid 7 to be plated, positioning linkage rod 71, sheet rubber 72, anode conducting plate 73, flange connecting rod 74, ring flange 75.
Embodiment
Illustrate that the present invention is further detailed explanation with embodiment below in conjunction with accompanying drawing.
See figure 1 – Fig. 8, a kind of large-scale ball size chrome-plating device, comprise conformal anode 1 and anode fixed part 3, described conformal anode 1 is fixedly connected with by anode fixed part 3 one end with anode conducting plate 73, and the other end of anode conducting plate 73 is connected with power supply by conducting copper;
Described conformal anode 1 comprises many anode straps 2, and many anode straps 2 surround a ball-type cage structure corresponding with spheroid 7 to be plated, and spheroid 7 to be plated is positioned at the inside of described ball-type cage structure, and is formed with anode strap gap 21 between adjacent anode bar 2; The bottom of described anode strap 2 is arranged along same lower circumference 23, and the top of described anode strap 2 is arranged along same top circumference 22, and top circumference 22 is fixedly connected with the bottom of anode fixed part 3.
Described anode strap 2 comprises interconnective long arc sheet 24 and arc sheet tip 25, and the top of long arc sheet 24 is positioned in top circumference 22, and the bottom of long arc sheet 24 is fixedly connected with the top of arc sheet tip 25, and the bottom of arc sheet tip 25 is positioned on lower circumference 23; The width of described long arc sheet 24 is equal with the top width of arc sheet tip 25, and the top width of described arc sheet tip 25 is greater than the bottom width of arc sheet tip 25.
The quantity of described anode strap 2 is at least four, and the bottom of described anode strap 2 is evenly arranged along same lower circumference 23, and the top of described anode strap 2 is evenly arranged along same top circumference 22.
Described anode fixed part 3 comprises left anode fixed part 31 and right anode fixed part 33, the shape of described left anode fixed part 31, right anode fixed part 33 is consistent, left anode fixed part 31 matches with right anode fixed part 33 and surrounds cylinder-like structure, and the bottom of described cylinder-like structure is fixedly connected with top circumference 22;
Described left anode fixed part 31 is evenly provided with at least two left anode fixed orificess 32, right anode fixed part 33 is evenly provided with at least two right anode fixed orificess 34.
Described chrome-plating device also comprises clip 4, and described clip 4 comprises left clip 5 and right clip 6;
Described left clip 5 comprises left clip body 53, left clip first connection section 51 and left clip second connection section 52, described left clip body 53 is in semi-annular shape, the middle part of left clip body 53 is evenly provided with the left clip positioning screw hole 54 matched with left anode fixed orifices 32, the two ends of left clip body 53 are fixedly connected with left clip first connection section 51, left clip second connection section 52 respectively, left clip first connection section 51 is provided with left clip first connecting hole 55, left clip second connection section 52 is provided with left clip second connecting hole 56;
Described right clip 6 comprises right clip body 63, right clip first connection section 61 and right clip second connection section 62, described right clip body 63 is in semi-annular shape, the middle part of right clip body 63 is evenly provided with the right clip positioning screw hole 64 matched with right anode fixed orifices 34, the two ends of right clip body 63 are fixedly connected with right clip first connection section 61, right clip second connection section 62 respectively, right clip first connection section 61 is provided with right clip first connecting hole 65, right clip second connection section 62 is provided with right clip second connecting hole 66;
Described left clip first connecting hole 55 is corresponding with right clip first connecting hole 65 to be arranged, and described left clip second connecting hole 56 is corresponding with right clip second connecting hole 66 to be arranged.
The top of described spheroid to be plated 7 is provided with the positioning linkage rod 71 corresponding with anode fixed part 3.
The bottom of described spheroid to be plated 7 is provided with flange connecting rod 74 and ring flange 75, the top of described flange connecting rod 74 is fixedly connected with the bottom of spheroid 7 to be plated, the bottom of flange connecting rod 74 is connected with the plan vertical of ring flange 75, and the top planes of ring flange 75 and lower circumference 23 place plane coincide.
Described conformal anode 1, anode fixed part 3 all adopt lead, lead antimony alloy or terne metal manufacture.
The radius of described spheroid to be plated 7 is more than or equal to 150 millimeters.
The radius of described spheroid to be plated 7 is 150 – 300 millimeters, and the radius of described conformal anode 1 is 230 – 410 millimeters, and the radius of described conformal anode 1 is the radius of the ball-type cage structure of multiple anode strip 2 composition.
Principle of the present invention is described as follows:
1, plating chromium: the dimensional precision only directly ensureing chromium plating position with chrome-plated process, does not need a kind of chrome-plating method carrying out mechanical workout again.
2, conformal anode:
The present invention is applicable to the ball-end parts that radius is more than or equal to 150 millimeters, is particularly useful for the ball-end parts of radius 150 – 300 millimeters.Owing to there being gas to produce in chrome-plating process, and spheroid to be plated 7 radius is larger, and the gas produced in electroplating process is more, therefore for the larger spheroid to be plated 7 of radius, needs the corresponding radius increasing conformal anode 1, to reach better exhaust effect, thus, for the to be plated spheroid 7 of radius 150 – 300 millimeters, employing radius is the conformal anode 1 of 230 – 410 millimeters, the radius of described conformal anode 1 is the radius of the ball-type cage structure of multiple anode strip 2 composition, when spheroid 7 radius to be plated increases, the radius of conformal anode 1 presses 1.2 times of increases of spheroid 7 radius increment to be plated, as the conformal anode 1 that radius spheroid to be plated 7 actionradius that is 150 millimeters is 230 millimeters, radius to be spheroid to be plated 7 actionradius of 225 millimeters the be conformal anode 1 of 320 millimeters, radius to be spheroid to be plated 7 actionradius of 300 millimeters the be conformal anode 1 of 410 millimeters.
The quantity of anode strap 2 is preferably more than 8, and along with the increase of spheroid 7 radius to be plated, anode strap 2 quantity increases gradually.
Described anode conducting plate 73 adopts copper sheet manufacture; Described conformal anode 1 adopts lead, containing the lead antimony alloy of antimony 6% – 8% or the terne metal manufacture of stanniferous 6% – 8%.
3, bath composition design:
In the present invention, in plating chromic electrolyte, the content of each composition is: chromic anhydride 180 – 220g/L, sulfuric acid 1.8 – 2.2g/L, trivalent chromium 2 – 4g/L, iron contamination≤5g/L, and the content of chromic anhydride is 80 – 100 times of sulfuric acid.In preparation electrolytic solution technique, due in chromic anhydride containing trace sulfate, and in electroplating process, sulfate ion concentration can affect electroplating effect, thus in this programme sulfuric acid add the content that total amount comprises the vitriol in chromic anhydride.
Chromic anhydride 180 – 220g/L, and the content of chromic anhydride is 80 – 100 times of sulfuric acid: the content of chromic anhydride affects solution property to a certain extent, and chromium anhydride concentration is higher, and electrical conductivity of solution is higher, and the covering power of layers of chrome is stronger.But chromium anhydride concentration is only the factor that solution property judges, the ratio of what its performance was main depend on chromic anhydride and sulfuric acid content, this programme reduces the impact of concentration difference on chromium coating thickness, the precision at guarantee chromium plating position.
Sulfuric acid 1.8 – 2.2g/L: when sulfuric acid content is too high, electroplate the layers of chrome that obtains grow dim, uneven; When sulfuric acid content is too low, electroplate obtain layers of chrome burnt hair, coarse, glossiness is poor.
Trivalent chromium 2 – 4g/L: when trivalent chromium content is too low, layers of chrome sedimentation velocity is slow, coating is soft, covering power is poor; When trivalent chromium too high levels, coating crow is dark, coarse, luminance brightness is poor, and bright current scope diminishes.
Iron contamination≤5g/L: add man-hour in plating, can accumulate certain iron metal ion in electrolytic solution, when iron metal ion runs up to a certain amount of, can affect electroplating effect, and as coating bright range reduces, the dispersive ability of electrolytic solution reduces, electroconductibility variation etc.
4, electroplating technology design:
Under anodic current density and the certain condition of electrolyte temperature, the sedimentation velocity of chromium coating is certain.Therefore, should strictly control anodic current density, electrolyte temperature and electroplating time when producing, thus by layers of chrome gauge control in the thickness range estimated.
The technological temperature of the present invention when plating milky white chromium is 70 – 74 DEG C, anodic current density is that 18 – 22 pacify/square decimeter, conduction time is 3 hours ± 5 minutes: current density selects technique lower limit (namely adopting lower current density), and the crystallization of milky white layers of chrome can be made more careful; And the time of plating milky white chromium determines divided by testing the milky white layers of chrome sedimentation velocity drawn according to the design thickness of milky white layers of chrome.
The technological temperature of the present invention when hard chrome plating is 51 – 55 DEG C, anodic current density is that 28 – 32 pacify/square decimeter, conduction time is 2 hours ± 5 minutes: current density selects technique lower limit (namely adopting lower current density), and the crystallization of hard chrome coating can be made more careful; And time during hard chrome plating determines divided by testing the hard chrome coating sedimentation velocity drawn according to the design thickness of hard chrome coating.
Forbid power-off in chromium plating production process: if again electroplated after power-off in chromium plating production process, tack variation, the layers of chrome that can produce chromium coating hold caducous problem.
Forbid in chromium plating production process adding water in chrome-plating bath: add water in chrome-plating bath in chromium plating production process, easily cause the solution temperature of different positions in plating tank not identical, and electrolyte temperature is uneven, the tack that can produce chromium coating is deteriorated, holds caducous problem.
Removing in groove technique: continuous clear water impacts the Cr-plating Bath of spheroid 7 remained on surface to be plated, is that Cr-plating Bath is dry affects chromium coating visual appearance in layers of chrome surface in order to prevent.
Embodiment 1:
See Fig. 1 to Fig. 6, a kind of large-scale ball size chrome-plating device, comprise conformal anode 1 and anode fixed part 3, described conformal anode 1 is fixedly connected with by anode fixed part 3 one end with anode conducting plate 73, the other end of anode conducting plate 73 is connected with power supply by conducting copper, described conformal anode 1 comprises many anode straps 2, many anode straps 2 surround a ball-type cage structure corresponding with spheroid 7 to be plated, spheroid 7 to be plated is positioned at the inside of described ball-type cage structure, and is formed with anode strap gap 21 between adjacent anode bar 2; The bottom of described anode strap 2 is evenly arranged along same lower circumference 23, and the top of described anode strap 2 is evenly arranged along same top circumference 22; Described anode strap 2 comprises interconnective long arc sheet 24 and arc sheet tip 25, and the top of long arc sheet 24 is positioned in top circumference 22, and the bottom of long arc sheet 24 is fixedly connected with the top of arc sheet tip 25, and the bottom of arc sheet tip 25 is positioned on lower circumference 23; The width of described long arc sheet 24 is equal with the top width of arc sheet tip 25, and the top width of described arc sheet tip 25 is greater than the bottom width of arc sheet tip 25.
See Fig. 1 to Fig. 6, a kind of using method of above-mentioned large-scale ball size chrome-plating device, comprises chromium plating liquid blending process, trade union college technique, the chrome-plated process that is energized, goes out groove dismounting technique, quality inspection technique;
A, described chromium plating liquid blending process refer to: in chrome-plating bath, prepare plating chromic electrolyte, in described plating chromic electrolyte, the content of each composition is: chromic anhydride 180 – 220g/L, sulfuric acid 1.8 – 2.2g/L, trivalent chromium 2 – 4g/L, iron contamination≤5g/L, and the content of chromic anhydride is 80 – 100 times of sulfuric acid;
Described chromium plating liquid blending process comprises following operation:
A, first clean chrome-plating bath, then the opposing steam flow water that will account for joined plating chromic electrolyte 2/3rds volume injects chrome-plating bath;
B, first take the chromic anhydride of aequum, then it is slowly added in chrome-plating bath in batches, while adding chromic anhydride, solution is stirred until added chromic anhydride dissolves completely;
C, first measure the sulfuric acid of aequum, then limit is slowly stirred limit and slowly added in solution by the sulfuric acid measured, after sulfuric acid adds, injecting steam recirculation water in chrome-plating bath, until the liquid level of solution arrives working level in chrome-plating bath; When measuring sulfuric acid, sulfuric acid amount contained in chromic anhydride need be counted;
D, first solution in chrome-plating bath is heated to work specified temperature, then solution in energising process chrome-plating bath, during energising, anodic current density is that 10 – 20 pacify/square decimeter, and cathode area used is 5 times of annode area;
After e, energising process terminate, first powered-down, then the sample getting solution in chrome-plating bath carries out examination plating, then adjust the composition of solution in chrome-plating bath according to examination plating result, until examination plating is qualified, now, chromium plating liquid blending process terminates;
B, described trade union college technique refer to: first carry out pre-treatment to conformal anode 1, workpiece to be plated, described workpiece to be plated comprises interconnective spheroid to be plated 7 and the portion that is fixed, the portion that will be fixed again is fixedly connected with anode fixed part 3, after connection, spheroid 7 to be plated is positioned at the center position of conformal anode 1 inside, then the distribution of each anode strap 2 is checked, and determine between spheroid 7 to be plated and conformal anode 1 non-conductive, subsequently, in clean installation process, spheroid 7 surface to be plated is by the dirt be stained with, after clean, trade union college technique terminates;
Described conformal anode 1, workpiece to be plated are carried out pre-treatment and referred to: first clean conformal anode 1 until metal true qualities are seen on conformal anode 1 surface, reexamine spheroid 7 appearance state to be plated, require the surperficial non-corroding of spheroid 7 to be plated, pit or exoncoma; If have corrosion, pit or exoncoma, then process to remove corrosion, pit or exoncoma to spheroid 7 surface to be plated, if non-corroding, pit or exoncoma, then clean spheroid 7 surface and oil contaminant to be plated, after cleaning, described pre-treatment terminates;
The distribution of each anode strap of described inspection 2 refers to: measure the minor increment of every root anode strap 2 to spheroid 7 surface to be plated, guarantee that every root anode strap 2 is no more than 3 millimeters to the deviation in range of the minor increment on spheroid 7 surface to be plated, measure the ultimate range between adjacent anode bar 2 simultaneously, guarantee that the deviation in range of the ultimate range between adjacent anode bar 2 is no more than 3 millimeters;
C, described energising chrome-plated process refers to: the conformal anode 1 first will installed, chrome-plating bath put into by workpiece to be plated, now conformal anode 1, spheroid 7 to be plated is all immersed in plating chromic electrolyte, again conducting copper is connected with anode fixed part 3 by anode conducting plate 73, then switch on power to carry out plating milky white chromium, when plating milky white chromium, bath temperature is 70 – 74 degrees Celsius, anodic current density is that 18 – 22 pacify/square decimeter, be energized 3 hours ± 5 minutes, plate milky white chromium terminate after hard chrome plating again, during hard chrome plating, bath temperature is 51 – 55 degrees Celsius, anodic current density is that 28 – 32 pacify/square decimeter, be energized 2 hours ± 5 minutes, after hard chrome plating terminates, energising chrome-plated process terminates,
Forbid power-off in described electroplating process, and forbid water filling in chrome-plating bath;
D, described in go out groove dismounting technique and refer to: after above-mentioned energising chrome-plated process terminates, first powered-down, to sling again workpiece to be plated, after workpiece to be plated goes out groove, first remove conducting copper, then remove conformal anode 1 to obtain the complete spheroid to be plated 7 of plating, wherein, at workpiece to be plated of slinging in the process obtaining the complete spheroid to be plated 7 of plating, with clear water continual rinsing spheroid to be plated 7 surface to keep spheroid 7 moistened surface to be plated; After obtaining the complete spheroid to be plated 7 of plating, continue to rinse spheroid 7 to be plated surface until its surface pH value is 6 – 7, now, described in go out groove dismounting technique and terminate;
E, quality inspection technique: comprise thickness inspection and visual inspection;
Described thickness inspection refers to: adopt magnetic-type gage to measure layers of chrome thickness, when layers of chrome thickness is 70 – 90 microns, product thickness meets the demands;
Described visual inspection refers to: require that chromium coating surface is without peeling, bubbling phenomenon, and chromium coating surfaceness is less than or equal to 0.8.
Embodiment 2:
The substance of described embodiment 2 is with embodiment 1, and difference is:
See Fig. 1 to Fig. 6, in a kind of large-scale ball size chrome-plating device:
Described anode fixed part 3 comprises left anode fixed part 31 and right anode fixed part 33, the shape of described left anode fixed part 31, right anode fixed part 33 is consistent, left anode fixed part 31 matches with right anode fixed part 33 and surrounds cylinder-like structure, and the bottom of described cylinder-like structure is fixedly connected with top circumference 22; Described left anode fixed part 31 is evenly provided with at least two left anode fixed orificess 32, right anode fixed part 33 is evenly provided with at least two right anode fixed orificess 34;
Described chrome-plating device also comprises clip 4, and described clip 4 comprises left clip 5 and right clip 6;
Described left clip 5 comprises left clip body 53, left clip first connection section 51 and left clip second connection section 52, described left clip body 53 is in semi-annular shape, the middle part of left clip body 53 is evenly provided with the left clip positioning screw hole 54 matched with left anode fixed orifices 32, the two ends of left clip body 53 are fixedly connected with left clip first connection section 51, left clip second connection section 52 respectively, left clip first connection section 51 is provided with left clip first connecting hole 55, left clip second connection section 52 is provided with left clip second connecting hole 56;
Described right clip 6 comprises right clip body 63, right clip first connection section 61 and right clip second connection section 62, described right clip body 63 is in semi-annular shape, the middle part of right clip body 63 is evenly provided with the right clip positioning screw hole 64 matched with right anode fixed orifices 34, the two ends of right clip body 63 are fixedly connected with right clip first connection section 61, right clip second connection section 62 respectively, right clip first connection section 61 is provided with right clip first connecting hole 65, right clip second connection section 62 is provided with right clip second connecting hole 66;
Described left clip first connecting hole 55 is corresponding with right clip first connecting hole 65 to be arranged, and described left clip second connecting hole 56 is corresponding with right clip second connecting hole 66 to be arranged.
See Fig. 1 to Fig. 6, in a kind of using method of above-mentioned large-scale ball size chrome-plating device:
The described portion of being fixed is positioning linkage rod 71, and the bottom of this positioning linkage rod 71 is fixedly connected with the top of spheroid 7 to be plated;
In described trade union college technique: the described portion that will be fixed is fixedly connected with anode fixed part 3 and refers to: first with plastic strip, positioning linkage rod 71 is carried out insulating wrapping process, then successively sheet rubber 72, clip 4, anode fixed part 3, anode conducting plate 73 are installed on positioning linkage rod 71.
Embodiment 3:
Embodiment 3 substance is with embodiment 2, and its difference is:
See Fig. 2 to Fig. 8, in a kind of using method of above-mentioned large-scale ball size chrome-plating device:
Described workpiece to be plated also comprises flange connecting rod 74 and ring flange 75, and the top of described flange connecting rod 74 is fixedly connected with the bottom of spheroid 7 to be plated, and the bottom of flange connecting rod 74 is connected with the plan vertical of ring flange 75;
In described trade union college technique: when spheroid 7 to be plated is positioned at the center position of conformal anode 1 inside, described lower circumference 23 place plane overlaps with the end face of ring flange 75; Described flange connecting rod 74, ring flange 75 all adopt plastic strip to carry out insulating wrapping process.
Claims (9)
1. one kind large-scale ball size chrome-plating device, comprise conformal anode (1) and anode fixed part (3), described conformal anode (1) is fixedly connected with by anode fixed part (3) one end with anode conducting plate (73), the other end of anode conducting plate (73) is connected with power supply by conducting copper, it is characterized in that:
Described conformal anode (1) comprises many anode straps (2), many anode straps (2) surround a ball-type cage structure corresponding with spheroid to be plated (7), spheroid to be plated (7) is positioned at the inside of described ball-type cage structure, and is formed with anode strap gap (21) between adjacent anode bar (2); The bottom of described anode strap (2) is arranged along same lower circumference (23), and the top of described anode strap (2) is arranged along same top circumference (22), and top circumference (22) is fixedly connected with the bottom of anode fixed part (3); The radius of described spheroid to be plated (7) is more than or equal to 150 millimeters.
2. the large-scale ball size chrome-plating device of one according to claim 1, it is characterized in that: described anode strap (2) comprises interconnective long arc sheet (24) and arc sheet tip (25), the top of long arc sheet (24) is positioned in top circumference (22), the bottom of long arc sheet (24) is fixedly connected with the top of arc sheet tip (25), and the bottom of arc sheet tip (25) is positioned on lower circumference (23); The width of described long arc sheet (24) is equal with the top width of arc sheet tip (25), and the top width of described arc sheet tip (25) is greater than the bottom width of arc sheet tip (25).
3. the large-scale ball size chrome-plating device of one according to claim 1, it is characterized in that: the quantity of described anode strap (2) is at least four, the bottom of described anode strap (2) is evenly arranged along same lower circumference (23), and the top of described anode strap (2) is evenly arranged along same top circumference (22).
4., according to the large-scale ball size chrome-plating device of the one in claim 1 – 3 described in any one, it is characterized in that:
Described anode fixed part (3) comprises left anode fixed part (31) and right anode fixed part (33), the shape of described left anode fixed part (31), right anode fixed part (33) is consistent, left anode fixed part (31) is matched with right anode fixed part (33) and is surrounded cylinder-like structure, and the bottom of described cylinder-like structure is fixedly connected with top circumference (22);
Described left anode fixed part (31) is evenly provided with at least two left anode fixed orificess (32), right anode fixed part (33) is evenly provided with at least two right anode fixed orificess (34).
5. the large-scale ball size chrome-plating device of one according to claim 4, is characterized in that: described chrome-plating device also comprises clip (4), described clip (4) comprises left clip (5) and right clip (6);
Described left clip (5) comprises left clip body (53), left clip first connection section (51) and left clip second connection section (52), described left clip body (53) is in semi-annular shape, the middle part of left clip body (53) is evenly provided with the left clip positioning screw hole (54) matched with left anode fixed orifices (32), the two ends of left clip body (53) respectively with left clip first connection section (51), left clip second connection section (52) is fixedly connected with, left clip first connection section (51) is provided with left clip first connecting hole (55), left clip second connection section (52) is provided with left clip second connecting hole (56),
Described right clip (6) comprises right clip body (63), right clip first connection section (61) and right clip second connection section (62), described right clip body (63) is in semi-annular shape, the middle part of right clip body (63) is evenly provided with the right clip positioning screw hole (64) matched with right anode fixed orifices (34), the two ends of right clip body (63) respectively with right clip first connection section (61), right clip second connection section (62) is fixedly connected with, right clip first connection section (61) is provided with right clip first connecting hole (65), right clip second connection section (62) is provided with right clip second connecting hole (66),
Described left clip first connecting hole (55) is corresponding with right clip first connecting hole (65) to be arranged, and described left clip second connecting hole (56) is corresponding with right clip second connecting hole (66) to be arranged.
6. according to the large-scale ball size chrome-plating device of the one in claim 1 – 3 described in any one, it is characterized in that: the top of described spheroid to be plated (7) is provided with the positioning linkage rod (71) corresponding with anode fixed part (3).
7., according to the large-scale ball size chrome-plating device of the one in claim 1 – 3 described in any one, it is characterized in that:
The bottom of described spheroid to be plated (7) is provided with flange connecting rod (74) and ring flange (75), the top of described flange connecting rod (74) is fixedly connected with the bottom of spheroid to be plated (7), the bottom of flange connecting rod (74) is connected with the plan vertical of ring flange (75), and the top planes of ring flange (75) and lower circumference (23) place plane coincide.
8. according to the large-scale ball size chrome-plating device of the one in claim 1 – 3 described in any one, it is characterized in that: described conformal anode (1), anode fixed part (3) all adopt lead, lead antimony alloy or terne metal manufacture.
9. according to the large-scale ball size chrome-plating device of the one in claim 1 – 3 described in any one, it is characterized in that: the radius of described spheroid to be plated (7) is 150 – 300 millimeters, the radius of described conformal anode (1) is 230 – 410 millimeters, and the radius of described conformal anode (1) is the radius of the ball-type cage structure that multiple anode strap (2) forms.
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| CN201210459242.8A CN102943294B (en) | 2012-11-15 | 2012-11-15 | A kind of large-scale ball size chrome-plating device |
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| CN201210459242.8A CN102943294B (en) | 2012-11-15 | 2012-11-15 | A kind of large-scale ball size chrome-plating device |
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| CN102943294A CN102943294A (en) | 2013-02-27 |
| CN102943294B true CN102943294B (en) | 2015-08-12 |
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| CN104372392A (en) * | 2014-11-28 | 2015-02-25 | 沈阳飞机工业（集团）有限公司 | Method for improving uniformity of small-curvature semiarc-surface chromium coating |
| CN107620114B (en) * | 2017-11-10 | 2019-07-19 | 中航飞机起落架有限责任公司 | A kind of electroplating anode device and chrome-plating method |
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