CN101422772B - Paints protection method before drawing and forming sheet metal parts - Google Patents
Paints protection method before drawing and forming sheet metal parts Download PDFInfo
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- CN101422772B CN101422772B CN2008102295628A CN200810229562A CN101422772B CN 101422772 B CN101422772 B CN 101422772B CN 2008102295628 A CN2008102295628 A CN 2008102295628A CN 200810229562 A CN200810229562 A CN 200810229562A CN 101422772 B CN101422772 B CN 101422772B
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Abstract
The invention relates to a method for coating a lacquer for protection before sheet metal component stretching, which belongs to the material technical field. The method includes the following steps of: (1) degreasing a component to be protected by adopting an organic agent; (2) adding a thinner, X-1, into a PROPACO R lacquer and then uniformly stirring the mixture; and (3) uniformly coating the diluted lacquer on the surface of the component by adopting a spraying machine, wherein, the lacquer is coated in a manner that the thickness of the solidified lacquer ranges from 10 microns to 15 microns; and drying the coated lacquer. The component coated by adopting the method of the invention is treated with punching and stretching tests, surface scuffing is obviously reduced to a great extent after the formation of the component, and no deep scuffing happens; the actual operation time for stretching each component and for trimming and correcting the surface is obviously reduced; and the method not only improves the product quality, but also improves the machining speed, and simultaneously solves the problem of lacquer film agglutination and component scuffing.
Description
Technical field
The invention belongs to the material technology field, the paints protection method before particularly a kind of drawing and forming sheet metal parts.
Background technology
Panel beating is a kind of comprehensive cold machining process at sheet metal (usually below 6mm), comprise cutting, dash/cutting/compound, roll over, weld, rivet, splice, be shaped (as body of a motor car) etc., and its notable attribute is exactly same part thickness unanimity.Sheet metal component is exactly the thin plate handware, just the part that can process by means such as punching press, bending, stretchings.
Stretching also claims to draw or roll, and is to utilize the plate blank that obtains behind the mould stamping-out to become the processing method for stamping of the hollow parts of opening.Tubular, stairstepping, taper, sphere, box-like and other erose thin-walled parts can be made with drawing process,, very complicated parts of shape can also be made if cooperate with other Sheet Metal Forming Technologies.In the drawing process of box-like tensioning member, the mid portion of plate becomes the bottom of part, does not deform substantially.And very big compressive plastic deformation will along the circumferential direction take place in the outside, and force unnecessary metal to flow along the radially generation of blank, thereby form the sidewall of tensioning member.
A pair of motion copy in the drawing process is same as common mechanical organ, and a side who relatively slides because of them is quenched hard mold, and the opposing party be than mould soft the processing plate of Duoing, so the difference that they are out of shape separately is very big; Along with the variation in processing orientation, the processing plate also has very big from difference at the distortion speed of each profiled section.By being observed, the representational tensioning member of part detects, the thickness of finding the tensioning member each several part is inconsistent, normally the bottom does not keep original thickness substantially, side wall upper part thickens, the bottom attenuation, and to go up to the thinnest slightly near bottom fillet place, this has just reflected the inconsistency of drawing process metal slippage.
If the annular section of blank is divided into some fillets and fan-shaped, suppose to divide excision scallop, remaining many fillets parts become the sidewall of tubular after the diameter circumference bending of tubular, as seen the metal of fan-shaped part is unnecessary, it is mobile to illustrate that this part metals has produced along radial direction in drawing process, thereby has increased the height of part.
Cut and other surface quality defect that the surface occurs that stretch mainly is to cause owing to the expanded material and the contact-making surface of mould produce relative slippage, and the inconsistent lip-deep cut of product that produced of this slippage suffered frictional resistance during because of the slippage of some particle places.
For zero clearance or negative clearance state drawing process, take usually to protect at piece surface.Because the resistance of deformation (σ s) of mild steel and stainless steel-like tensioning member is relatively low, the distortion heat that produces in the woollen flow process is also relatively low, therefore uses zapon can satisfy the surface requirements of protection part substantially; But for high temperature alloy, because σ s is higher, especially the distortion heat of deep drawn part significantly improves, and the adhesion of zapon and plate is reduced rapidly by the influence of flow of metal heat, just cause enamelled coating to come off and can not play effective protective effect, thus the scuffing that produces the tensioning member sidewall; Simultaneously, coming off is deposited in the enamelled coating of die mouth, and mobile, extruding along with woolen cloth very easily cause secondary damage to product again.At this kind stamping defect, the general technology that adopts follow-up increase pincers worker to throw the face of repairing watch, its result not only increases processing cost and labor strength, simultaneously contaminated environment, importantly manual the throwing repaiied part wall thickness reduction and the inhomogeneities of bringing, and certainly will influence the serviceability of product.The lip-deep cut of product is the defective of puzzlement cold stamping deformation technique always, how to reduce even avoid this kind generation of defects, it is an urgent demand of constantly moving towards high accuracy punching press distortion part, especially for aviation cold stamping product, process the uniformity coefficient of the woollen matrix in back, directly influence the security reliability and the service life of parts and even complete machine.
Part subcontracts the punching stretch product because diameter tolerance is little; drawing die need adopt negative clearance just can meet design requirement; it stretches highly big relatively in addition; traditional protection technology; promptly adopt homemade zapon Q01-1 to implement the protection of stretching Front-coating mirror, have the problem that part scratches and coating shedding is pasted mould always.
Summary of the invention
At above technical problem, the invention provides the preceding paints protection method of a kind of drawing and forming sheet metal parts.The present invention is by the international cooperation and the exchange of technology of sub-contracting production; employing meets the protective medium of special process requirement; by selecting suitable diluent and dilution ratio; the paint vehicle viscosity number that control is best; the film thickness value that acquisition is best has fundamentally solved the surface tear problem in the sheet metal component punching stretch forming process; thereby the surface that has solved the production of part later stage is thrown and is repaiied and the finishing process bottleneck problem, has improved the quality that the sheet metal component punching stretch is shaped.
Paints protection method before the drawing and forming sheet metal parts of the present invention adopts the PROPACO R paint vehicle of import to carry out the varnish protection; PROPACO R is a kind of light red orange varnish that affiliate France Socomor company of Snecma company produces, and is widely used in various metals particularly in the surfacecti proteon of aluminium alloy, titanium alloy.This lacquer is done the basic no adhesion in back, and good water solubility is easy to remove, and stable under the room temperature.
Step of the present invention is:
1, adopts organic solvent to part oil removing to be protected, at room temperature dry to the surface part solvent-free then.Wherein organic solvent is industrial organic solvent commonly used.
2, adding diluent in paint vehicle (PROPACO R) stirs; Paint vehicle viscosity is 15～17s to the addition of diluent behind the diluent by adding.
The diluent that adopts among the present invention is X-1 (ZBG 52001-87).
Viscosity test among the present invention adopts GB/T1723 " japanning viscosity test method "
3, adopt the paint vehicle after spraying equipment will dilute evenly to spray at piece surface, it is 10～15 microns that quantity for spray solidifies back thickness by paint vehicle; Use the cleaning of handling through oil water separator, dry compressed air when wherein spraying, compressed air pressure is 0.2～0.6MPa, and spray angle is that 45～90 ° of spray distances are 200mm～300mm; With the part drying after the spraying, drying condition is no less than 24h for air dry at ambient temperature, perhaps dries 30～60min under 60 ± 10 ℃ of conditions.
After the spraying enamelled coating is evenly distributed at piece surface among the present invention, the part thin for enamelled coating need fill spray; Obtain adhesion and the qualified enamelled coating of thickness; Polishing cleaning diel burr and foul before carrying out the punching stretch operation utilize test specimen to adjust the die clearance, make it even.
Adopt the part of the preceding paints protection method spraying of drawing and forming sheet metal parts of the present invention to carry out the punching stretch test, the part forming rear surface scratches obviously significantly reduces, and does not have degree of depth scuffing; Each part stretching process practical operation time and throwing are repaiied, are revised the surperficial operation practical operation time and obviously reduce; Promptly improve product quality, improved process velocity again, solved the problem that paint film bonding and part scratch simultaneously.Guard method was under the constant situation of drawing parameter before sheet metal component of the present invention stretched, and made the enamelled coating of piece surface reach the best in lubrication in the part drawing process and protective effect effect, prevented that part is damaged in drawing process.The key problem in technology of the required breakthrough of this method is the selection that the paint vehicle of protection usefulness reaches supporting with it diluent; The enamelled coating that this technology obtained can bear the pressure-pad-force of deep drawn, negative clearance (800 tons pressure) and 168 tons simultaneously, guarantees that part is not scratched in drawing process.The protective value of the protective layer that this technology obtains is far superior to the protective value of prior art in the industry.Technology is simple, and is easy to operate.This technology has been applied in the sheet metal component stretching production process, and is respond well, and performance, state are highly stable, satisfy the resist technology requirement of negative clearance, deep drawn, and this technology can also be promoted towards the same industry, popularize simultaneously.
The present invention selects diluent to adjust thinner ratio by adopting the PROPACO R paint vehicle of import, optimizes spray parameters, has saved cost, has alleviated the amount of labour, has improved production efficiency; This technology being applied in the sheet metal component stretch forming protection technology of large thin-wall parts such as warplane and civil aircraft, is once great promotion for the sheet metal part surface protection technique, has considerable economic and good social benefit.
Description of drawings
Fig. 1 is box-like tensioning member tectonic model figure.
Fig. 2 is a cylindrical member drawing process schematic diagram, and 1 is punch among the figure, and 2 is blank holder, and 3 is die, and d is drum diameter.
Fig. 3 forms mechanism figure for the tensioning member sidewall.
Fig. 4 is for adopting domestic protection by paints and lacquers technology punching stretch shaping back piece surface figure.
Fig. 5 is for adopting domestic protection by paints and lacquers technology punching stretch shaping back piece surface figure.
Fig. 6 for the method protection by paints and lacquers technology that adopts the embodiment of the invention 1 after piece surface figure after the punching press stretch forming.
Fig. 7 for the method protection by paints and lacquers technology that adopts the embodiment of the invention 2 after piece surface figure after the punching press stretch forming.
Fig. 8 for the method protection by paints and lacquers technology that adopts the embodiment of the invention 3 after piece surface figure after the punching press stretch forming.
The specific embodiment
The organic solvent that the part oil removing is adopted in the embodiment of the invention is industrial acetone.
The diluent that adopts in the embodiment of the invention is the X-1 diluent.
The strict GB/T1723 " japanning viscosity test method " that carries out of viscosity test method in the embodiment of the invention
Spray in the embodiment of the invention the protection part be CFM56-7 cowling sheet metal component.
Spraying equipment in the embodiment of the invention adopts the spraying equipment that has oil water separator.
Embodiment 1
Adopt organic solvent to the oil removing of CFM56-7 cowling sheet metal component, then this part is at room temperature dried.
Add diluent and stir in paint vehicle (PROPACO R), paint vehicle viscosity is 15～17s to the addition of diluent behind the diluent by adding.
Adopt the paint vehicle after spraying equipment will dilute evenly to spray at piece surface, use the cleaning of handling through oil water separator, dry compressed air during spraying, compressed air pressure is 0.2MPa, and spray angle is that 45～90 ° of spray distances are 200mm～300mm; With the part drying after the spraying, drying condition is air dry 24h at ambient temperature, and paint vehicle solidifies afterwards that thickness is 15 microns.
After CFM56-7 cowling sheet metal component behind the sprayed protection was shaped through punching stretch, its outward appearance as shown in Figure 6.Compare with the surface (as shown in Figure 4) of the domestic protection by paints and lacquers technology punching stretch shaping of employing back part, the part forming rear surface scratches obviously significantly reduces, and does not have degree of depth scuffing; Each part stretching process practical operation time decreased 30 minutes is thrown and is repaiied and revise surperficial operation practical operation time decreased 6 hours.
Embodiment 2
Adopt organic solvent to the oil removing of CFM56-7 cowling sheet metal component, then this part is at room temperature dried.
Add diluent and stir in paint vehicle (PROPACO R), paint vehicle viscosity is 15～17s to the addition of diluent behind the diluent by adding.
Adopt the paint vehicle after spraying equipment will dilute evenly to spray at piece surface, use the cleaning of handling through oil water separator, dry compressed air during spraying, compressed air pressure is 0.4MPa, and spray angle is that 45～90 ° of spray distances are 200mm～300mm; With the part drying after the spraying, drying condition is air dry 24h at ambient temperature, and paint vehicle solidifies afterwards that thickness is 13 microns.
After CFM56-7 cowling sheet metal component behind the sprayed protection was shaped through punching stretch, its outward appearance as shown in Figure 7.Compare with the surface (as shown in Figure 5) of the domestic protection by paints and lacquers technology punching stretch shaping of employing back part, the part forming rear surface scratches obviously significantly reduces, and does not have degree of depth scuffing; Each part stretching process practical operation time decreased 30 minutes is thrown and is repaiied and revise surperficial operation practical operation time decreased 6 hours.
Embodiment 3
Adopt organic solvent to the oil removing of CFM56-7 cowling sheet metal component, then this part is at room temperature dried.
Add diluent and stir in paint vehicle (PROPACO R), paint vehicle viscosity is 15～17s to the addition of diluent behind the diluent by adding.
Adopt the paint vehicle after spraying equipment will dilute evenly to spray at piece surface, use the cleaning of handling through oil water separator, dry compressed air during spraying, compressed air pressure is 0.6MPa, and spray angle is that 45～90 ° of spray distances are 200mm～300mm; With the part drying after the spraying, drying condition is air dry 24h at ambient temperature, and paint vehicle solidifies afterwards that thickness is 10 microns.
After CFM56-7 cowling sheet metal component behind the sprayed protection was shaped through punching stretch, its outward appearance as shown in Figure 8.Compare with the surface of the domestic protection by paints and lacquers technology punching stretch shaping of employing back part, the part forming rear surface scratches obviously significantly reduces, and does not have degree of depth scuffing; Each part stretching process practical operation time decreased 30 minutes is thrown and is repaiied and revise surperficial operation practical operation time decreased 6 hours.
Claims (3)
1. the paints protection method before the drawing and forming sheet metal parts, it is characterized in that may further comprise the steps: (1) adopts organic solvent to part oil removing to be protected, then part is dried; (2) adding the trade mark in PROPACO R paint vehicle is that the X-1 diluent of ZBG52001-87D stirs, and paint vehicle viscosity is 15～17s to the addition of diluent behind the diluent by adding; (3) adopt the paint vehicle after spraying equipment will dilute evenly to spray at piece surface, it is 10～15 microns that quantity for spray solidifies back thickness by paint vehicle; Spray parameters is: compressed air pressure is 0.2～0.6MPa, and spray angle is that 45～90 ° of spray distances are 200mm～300mm; With the part drying after the spraying.
2. the paints protection method before a kind of drawing and forming sheet metal parts according to claim 1, the part drying means after it is characterized in that spraying is: air dry is no less than 24h at ambient temperature, perhaps dries 30～60min under 60 ± 10 ℃ of conditions.
3. the paints protection method before a kind of drawing and forming sheet metal parts according to claim 1 is characterized in that the compressed air of described spraying compressed air for handling through water-oil separating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102295628A CN101422772B (en) | 2008-12-10 | 2008-12-10 | Paints protection method before drawing and forming sheet metal parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102295628A CN101422772B (en) | 2008-12-10 | 2008-12-10 | Paints protection method before drawing and forming sheet metal parts |
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| Publication Number | Publication Date |
|---|---|
| CN101422772A CN101422772A (en) | 2009-05-06 |
| CN101422772B true CN101422772B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102295628A Expired - Fee Related CN101422772B (en) | 2008-12-10 | 2008-12-10 | Paints protection method before drawing and forming sheet metal parts |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497879A (en) * | 2014-12-31 | 2015-04-08 | 芜湖协诚金属制品有限公司 | Coating agent for punch forming of automobile guide plate |
| CN104475312A (en) * | 2014-12-31 | 2015-04-01 | 芜湖环球汽车配件有限公司 | Spraying protecting method before drawing and forming of automobile sheet metal part |
| CN105642781B (en) * | 2015-12-31 | 2018-07-13 | 徐州德坤电气科技有限公司 | A kind of artificial intelligence sheet metal component production system |
| CN110293011A (en) * | 2018-03-23 | 2019-10-01 | 青岛海尔智慧厨房电器有限公司 | Smoke collecting cavity and range hood |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077676A (en) * | 2006-05-23 | 2007-11-28 | 海尔集团公司 | Printing decoration metallic plate capable of panel beating and manufacturing method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077676A (en) * | 2006-05-23 | 2007-11-28 | 海尔集团公司 | Printing decoration metallic plate capable of panel beating and manufacturing method thereof |
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| CN101422772A (en) | 2009-05-06 |
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Granted publication date: 20110622 Termination date: 20131210 |