CN104475312A - Spraying protecting method before drawing and forming of automobile sheet metal part - Google Patents
Spraying protecting method before drawing and forming of automobile sheet metal part Download PDFInfo
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- CN104475312A CN104475312A CN201410846034.2A CN201410846034A CN104475312A CN 104475312 A CN104475312 A CN 104475312A CN 201410846034 A CN201410846034 A CN 201410846034A CN 104475312 A CN104475312 A CN 104475312A
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Abstract
The invention discloses a spraying protecting method before drawing and forming of an automobile sheet metal part, and belongs to the technical field of machining of automobile sheet metal parts. The spraying protecting method comprises the following steps: firstly, preparing a coating agent for spraying, wherein the coating agent consists of a paint material and a diluent; secondly, performing pretreatment on the automobile sheet metal part, removing oil from the automobile sheet metal part before drawing and forming by adopting an organic solvent, and drying the automobile sheet metal part; thirdly, spraying the coating agent prepared in the first step on the surface of the automobile sheet metal part which is subjected to the pretreatment in the second step by using spraying equipment, and drying the sprayed automobile sheet metal part, wherein the spraying amount is that the coating agent is 8 to 9 microns after the coating agent is cured, the pressure of compressed air is 0.3 to 0.4 MPa when the coating agent is sprayed, and the spraying distance is 160 to 180 mm. According to the spraying protecting method, the coating agent is uniformly sprayed on the surface of the automobile sheet metal part after the automobile sheet metal part is subjected to the pretreatment, so that the spraying protecting method has important effects on preventing a workpiece from straining and cracking and preventing a mould from wearing when a thick workpiece is drawn or bent.
Description
Technical field
The present invention relates to plates of automobile processing technique field, more particularly, relate to a kind of sprayed protection method before automobile metal plate work drawing and forming.
Background technology
Panel beating is for a kind of comprehensive cold machining process of sheet metal (usually at below 6mm), comprises cutting, rushing/cut/compound, folding, welding, riveted joint, splicing, shaping (as body of a motor car) etc.Its significant feature is exactly Same Part consistency of thickness.Panel beating is the hinge technology that panel beating technical staff needs to hold, and is also the important procedure that sheet metal product is shaped.Panel beating comprises method and the technological parameters such as traditional cutting stock, punch press process, curved pressing formation, comprises again various cold punching die structure &processes parameter, various equipment operation principle and method of operating, also comprise new stamping technology and new technology.
Drawing also claims drawing or calendering, is the processing method for stamping that the plate blank obtained after utilizing Dies ' Blanking becomes the hollow parts of opening.Tubular, stairstepping, taper, spherical, box-like and other erose thin-walled parts can be made with deep-drawing technique, if coordinated with other Sheet Metal Forming Technologies, the part that shape is very complicated can also be manufactured.In the drawing process of rectangular drawpiece, the mid portion of plate becomes the bottom of part, does not substantially deform.And very large compressive plastic deformation will along the circumferential direction occur in outside, and force unnecessary metal to produce flowing along the radial direction of blank, thus form the sidewall of drawing part.A pair kinematic pair in drawing process is different from common mechanical organ, and the side because of their relative sliding is quenched hard mold, and the opposing party is much softer than mould processing plate, so their very different of being out of shape separately; Along with the change in processing orientation, processing plate also has very large from difference at the distortion speed of each profiled section.Detect by observing the representational drawing part of part, the thickness of discovery drawing part each several part is inconsistent, normally bottom is basic keeps original thickness, side wall upper part thickens, thin down portions, and with slightly upper for the thinnest close to bottom roundings place, this just reflects the inconsistency of drawing process metal slippage.
The cut that drawing surface occurs and other surface quality defect mainly cause because the contact surface of drawing material and mould produces Relative sliding, and the cut that this slippage creates on article surface because of the inconsistent of frictional resistance suffered during some particle place slippage.Cut on article surface is the defect of puzzlement cold stamping deformation technique always, how to reduce, even avoid the generation of this kind of defect, it is an urgent demand constantly moving towards high accuracy Pressing Deformation part, especially for automobile cold stamping product, after processing, the uniformity coefficient of woollen matrix, directly affects security reliability and the service life of parts and even complete machine.
In prior art; cut is produced in automobile metal plate work drawing and forming process; generally carry out sprayed protection process before drawing and forming; but the technique due to sprayed protection process is difficult to grasp, and causes the difficult problem producing cut in automobile metal plate work drawing and forming process to perplex the processing of high-quality automobile metal plate work always.
Summary of the invention
1. invent the technical problem that will solve
The object of the invention is to overcome the deficiency easily producing cut in prior art in automobile metal plate work drawing and forming process; provide a kind of sprayed protection method before automobile metal plate work drawing and forming; adopt technical scheme of the present invention; fundamentally can solve the surface tear problem in sheet metal component punching press drawing process; thus the surface throwing solving the production of part later stage is repaiied and finishing process bottleneck problem, improves the quality of sheet metal component punching press drawing and forming.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
Sprayed protection method before a kind of automobile metal plate work drawing and forming of the present invention, the steps include:
The coating agent of step one, preparation spraying
This coating agent by painting material and diluent forms, wherein: the mass ratio of paint material and diluent is 100:1-3;
Step 2, automobile metal plate work pretreatment
By treating that the automobile metal plate work before drawing and forming adopts organic solvent to carry out oil removing, then automobile metal plate work is dried;
Step 3, spraying process
With spraying equipment, the coating agent prepared in step one is sprayed on the pretreated automobile metal plate work surface of step 2, quantity for spray is 8 ~ 9 microns by thickness after coating agent solidification, compressed air pressure during spraying is 0.3 ~ 0.4MPa, spray distance is 160mm ~ 180mm, and the automobile metal plate work after spraying is dry.
Further, in step one, the preparation process of coating agent is as follows:
(1) each component of diluent, is prepared by mass fraction: gasoline, X-4 amino paint diluent, zinc dialkyl dithiophosphate, diethylene glycol ethylmethyl ether, methylisobutylketone, isopropyl alcohol, pyrroles, polyvinyl alcohol, diethylene glycol dimethyl ether, dichloroethanes; And X-4 amino paint diluent is joined in gasoline, be uniformly mixed to obtain mixture A;
(2) zinc dialkyl dithiophosphate, by preparing in step (1), diethylene glycol ethylmethyl ether, methylisobutylketone, isopropyl alcohol, pyrroles, polyvinyl alcohol, diethylene glycol dimethyl ether, dichloroethanes mixing and stirring at normal temperatures, obtain mixture B;
(3), mixture A obtained in step (1) is poured in reactor, again mixture B obtained in step (2) is poured in reactor, pass into nitrogen purge 15-20 minute, purging terminates rear closedown nitrogen and starts to stir, mixing speed controls as 150-200 rpm, mixing time is 30 ~ 35 minutes, 43-52 DEG C is warming up to after stirring terminates, react and be warming up to 62-70 DEG C after 1-2 hour, reaction 2-3 hour, continue to be warming up to 90-96 DEG C, reaction 3-4 hour, namely obtains diluent after cooling again;
(4) each component of paint material is prepared by mass fraction: namely above-mentioned three component mixing and stirring are obtained paint material by ester gum varniss 100 ~ 110 parts, 20 ~ 30 parts, vaseline, acrylic lacquer 80 ~ 90 parts;
(5) by the paint material mixing in diluent obtained for step (3) and step (4), coating agent is obtained.
Further, each component of diluent that step (1) prepares forms by following mass parts: 100 parts, gasoline, X-4 amino paint diluent 20 ~ 25 parts, zinc dialkyl dithiophosphate 10 ~ 12 parts, diethylene glycol ethylmethyl ether 7 ~ 9 parts, methylisobutylketone 4 ~ 7 parts, isopropyl alcohol 6 ~ 8 parts, pyrroles 5 ~ 9 parts, polyvinyl alcohol 5 ~ 9 parts, diethylene glycol dimethyl ether 11 ~ 13 parts, dichloroethanes 11 ~ 13 parts.
Further, each component of diluent that step (1) prepares forms by following mass parts:
100 parts, gasoline,
X-4 amino paint diluent 23 parts,
Zinc dialkyl dithiophosphate 11 parts,
Diethylene glycol ethylmethyl ether 8 parts,
Methylisobutylketone 5 parts,
Isopropyl alcohol 7 parts,
Pyrroles 8 parts,
Polyvinyl alcohol 7 parts,
Diethylene glycol dimethyl ether 12 parts,
Dichloroethanes 12 parts.
Further, each component of diluent that step (1) prepares forms by following mass parts:
100 parts, gasoline,
X-4 amino paint diluent 23 parts,
Zinc dialkyl dithiophosphate 10 parts,
Diethylene glycol ethylmethyl ether 7 parts,
Methylisobutylketone 4 parts,
Isopropyl alcohol 6 parts,
Pyrroles 5 parts,
Polyvinyl alcohol 5 parts,
Diethylene glycol dimethyl ether 11 parts,
Dichloroethanes 11 parts.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
Sprayed protection method before a kind of automobile metal plate work drawing and forming of the present invention; after to automobile metal plate work pretreatment; by coating agent even application special for the present invention on automobile metal plate work surface; the coating agent that the present invention adopts thick workpiece drawing or bending time, pull preventing workpiece, drawing crack, die wear aspect play an important role.The coating material provided in the present invention is used to be sprayed on automobile metal plate work; best paint film thickness angle value can be obtained; the lubrication of the coat on automobile metal plate work surface in part drawing process and protective effect effect is enable to reach best; prevent part to be damaged in drawing process, fundamentally solve the surface tear problem in sheet metal component punching press drawing process.
Detailed description of the invention
For understanding content of the present invention further, below in conjunction with embodiment, the invention will be further described.
embodiment 1
Sprayed protection method before a kind of automobile metal plate work drawing and forming of the present embodiment, the steps include:
The coating agent of step one, preparation spraying
This coating agent by painting material and diluent forms, wherein: the mass ratio of paint material and diluent is 100:2; The preparation process of concrete coating agent is in the present embodiment as follows:
(1) each component of diluent, is prepared by mass fraction: 100 parts, gasoline, X-4 amino paint diluent 23 parts, zinc dialkyl dithiophosphate 11 parts, diethylene glycol ethylmethyl ether 8 parts, methylisobutylketone 5 parts, isopropyl alcohol 7 parts, pyrroles 8 parts, polyvinyl alcohol 7 parts, diethylene glycol dimethyl ether 12 parts, dichloroethanes 12 parts; And X-4 amino paint diluent is joined in gasoline, be uniformly mixed to obtain mixture A;
(2) zinc dialkyl dithiophosphate, by preparing in step (1), diethylene glycol ethylmethyl ether, methylisobutylketone, isopropyl alcohol, pyrroles, polyvinyl alcohol, diethylene glycol dimethyl ether, dichloroethanes mixing and stirring at normal temperatures, obtain mixture B;
(3), mixture A obtained in step (1) is poured in reactor, again mixture B obtained in step (2) is poured in reactor, pass into nitrogen purge 18 minutes, purging terminates rear closedown nitrogen and starts to stir, it is 180 rpm that mixing speed controls, mixing time is 32 minutes, stir after terminating and be warmed up to 40 DEG C with the programming rate of 2 DEG C/min, static insulation is after 10 minutes, 48 DEG C are warming up to again with the programming rate of 2 DEG C/min, react and be warmed up to 57 DEG C with the programming rate of 3 DEG C/min after 1.5 hours, static insulation is after 8 minutes, 67 DEG C are warming up to again with the programming rate of 2 DEG C/min, react 2.5 hours, continue again to be warming up to 93 DEG C, its programming rate is 2 DEG C/min, react 3.5 hours, after cooling, obtain diluent.Preparation method in the present embodiment, adopt specific technology controlling and process, especially mixture A and mixture B was mixing the control of the temperature in process, made gasoline, X-4 amino paint diluent and auxiliary addition agent be disperseed fully and be cross-linked, greatly improved the final utilization performance of diluent;
(4) each component of paint material is prepared by mass fraction: namely above-mentioned three component mixing and stirring are obtained paint material by ester gum varniss 105 parts, 26 parts, vaseline, acrylic lacquer 84 parts;
(5) by the paint material mixing in diluent obtained for step (3) and step (4), coating agent is obtained.
Step 2, automobile metal plate work pretreatment
By treating that the automobile metal plate work before drawing and forming adopts organic solvent to carry out oil removing, then automobile metal plate work is dried.
Step 3, spraying process
With spraying equipment, the coating agent prepared in step one is sprayed on the pretreated automobile metal plate work surface of step 2, quantity for spray is 8 ~ 9 microns by thickness after coating agent solidification, in the present embodiment, thickness is 8 microns, compressed air pressure during spraying is 0.35MPa, spray distance is 170mm, and the automobile metal plate work after spraying is dry.In order to ensure the optimum efficiency of follow-up drawing and forming, dry run in the present embodiment is as follows: the automobile metal plate work after spraying is put into drying oven, first by temperature from room temperature even 40 DEG C, then 20 minutes are incubated, be warming up to 60 DEG C with the programming rate of 4 DEG C/min after insulation, be then incubated 35 minutes, namely dry run terminates, adopt such dry run can well anchor at automobile metal plate work surface at coating agent, improve drawing and forming effect.
embodiment 2
Sprayed protection method before a kind of automobile metal plate work drawing and forming of the present embodiment, its basic step is with embodiment 1, and difference is:
Step one prepares in the process of the coating agent of spraying, the mass ratio of paint material and diluent is 100:1, wherein: diluent is made up of following component, and each component by following mass parts composition: 100 parts, gasoline, X-4 amino paint diluent 23 parts, zinc dialkyl dithiophosphate 10 parts, diethylene glycol ethylmethyl ether 7 parts, methylisobutylketone 4 parts, isopropyl alcohol 6 parts, pyrroles 5 parts, polyvinyl alcohol 5 parts, diethylene glycol dimethyl ether 11 parts, dichloroethanes 11 parts.Each component of paint material is prepared: ester gum varniss 100 parts, 30 parts, vaseline, acrylic lacquer 80 parts by mass fraction.
embodiment 3
Sprayed protection method before a kind of automobile metal plate work drawing and forming of the present embodiment, its basic step is with embodiment 1, and difference is:
Step one prepares in the process of the coating agent of spraying, the mass ratio of paint material and diluent is 100:3, wherein: diluent is made up of following component, and each component by following mass parts composition: 100 parts, gasoline, X-4 amino paint diluent 23 parts, zinc dialkyl dithiophosphate 12 parts, diethylene glycol ethylmethyl ether 9 parts, methylisobutylketone 7 parts, isopropyl alcohol 8 parts, pyrroles 9 parts, polyvinyl alcohol 9 parts, diethylene glycol dimethyl ether 13 parts, dichloroethanes 13 parts.Each component of paint material is prepared: ester gum varniss 110 parts, 20 parts, vaseline, acrylic lacquer 90 parts by mass fraction.
Sprayed protection method before a kind of automobile metal plate work drawing and forming of embodiment 1 ~ 3; after to automobile metal plate work pretreatment; by coating agent even application special for the present invention on automobile metal plate work surface; the coating agent that the present invention adopts thick workpiece drawing or bending time, pull preventing workpiece, drawing crack, die wear aspect play an important role.The coating material provided in the present invention is used to be sprayed on automobile metal plate work; best paint film thickness angle value can be obtained; the lubrication of the coat on automobile metal plate work surface in part drawing process and protective effect effect is enable to reach best; prevent part to be damaged in drawing process, fundamentally solve the surface tear problem in sheet metal component punching press drawing process.Technical problem crucial in embodiment 1 ~ 3 is that the component of diluent and paint material in coat coordinates, and coat of the present invention can bear deep drawing, the negative clearance pressure within 835 tons and the pressure-pad-force of 178 tons, ensures that part is not scratched in drawing process.
Claims (5)
1. the sprayed protection method before automobile metal plate work drawing and forming, is characterized in that, the steps include:
The coating agent of step one, preparation spraying
This coating agent by painting material and diluent forms, wherein: the mass ratio of paint material and diluent is 100:1-3;
Step 2, automobile metal plate work pretreatment
By treating that the automobile metal plate work before drawing and forming adopts organic solvent to carry out oil removing, then automobile metal plate work is dried;
Step 3, spraying process
With spraying equipment, the coating agent prepared in step one is sprayed on the pretreated automobile metal plate work surface of step 2, quantity for spray is 8 ~ 9 microns by thickness after coating agent solidification, compressed air pressure during spraying is 0.3 ~ 0.4MPa, spray distance is 160mm ~ 180mm, and the automobile metal plate work after spraying is dry.
2. the sprayed protection method before a kind of automobile metal plate work drawing and forming according to claim 1, it is characterized in that, in step one, the preparation process of coating agent is as follows:
(1) each component of diluent, is prepared by mass fraction: gasoline, X-4 amino paint diluent, zinc dialkyl dithiophosphate, diethylene glycol ethylmethyl ether, methylisobutylketone, isopropyl alcohol, pyrroles, polyvinyl alcohol, diethylene glycol dimethyl ether, dichloroethanes; And X-4 amino paint diluent is joined in gasoline, be uniformly mixed to obtain mixture A;
(2) zinc dialkyl dithiophosphate, by preparing in step (1), diethylene glycol ethylmethyl ether, methylisobutylketone, isopropyl alcohol, pyrroles, polyvinyl alcohol, diethylene glycol dimethyl ether, dichloroethanes mixing and stirring at normal temperatures, obtain mixture B;
(3), mixture A obtained in step (1) is poured in reactor, again mixture B obtained in step (2) is poured in reactor, pass into nitrogen purge 15-20 minute, purging terminates rear closedown nitrogen and starts to stir, mixing speed controls as 150-200 rpm, mixing time is 30 ~ 35 minutes, 43-52 DEG C is warming up to after stirring terminates, react and be warming up to 62-70 DEG C after 1-2 hour, reaction 2-3 hour, continue to be warming up to 90-96 DEG C, reaction 3-4 hour, namely obtains diluent after cooling again;
(4) each component of paint material is prepared by mass fraction: namely above-mentioned three component mixing and stirring are obtained paint material by ester gum varniss 100 ~ 110 parts, 20 ~ 30 parts, vaseline, acrylic lacquer 80 ~ 90 parts;
(5) by the paint material mixing in diluent obtained for step (3) and step (4), coating agent is obtained.
3. the sprayed protection method before a kind of automobile metal plate work drawing and forming according to claim 1; it is characterized in that, each component of diluent that step (1) prepares forms by following mass parts: 100 parts, gasoline, X-4 amino paint diluent 20 ~ 25 parts, zinc dialkyl dithiophosphate 10 ~ 12 parts, diethylene glycol ethylmethyl ether 7 ~ 9 parts, methylisobutylketone 4 ~ 7 parts, isopropyl alcohol 6 ~ 8 parts, pyrroles 5 ~ 9 parts, polyvinyl alcohol 5 ~ 9 parts, diethylene glycol dimethyl ether 11 ~ 13 parts, dichloroethanes 11 ~ 13 parts.
4. the sprayed protection method before a kind of automobile metal plate work drawing and forming according to claim 2, is characterized in that, each component of diluent that step (1) prepares forms by following mass parts:
100 parts, gasoline,
X-4 amino paint diluent 23 parts,
Zinc dialkyl dithiophosphate 11 parts,
Diethylene glycol ethylmethyl ether 8 parts,
Methylisobutylketone 5 parts,
Isopropyl alcohol 7 parts,
Pyrroles 8 parts,
Polyvinyl alcohol 7 parts,
Diethylene glycol dimethyl ether 12 parts,
Dichloroethanes 12 parts.
5. the sprayed protection method before a kind of automobile metal plate work drawing and forming according to claim 2, is characterized in that, each component of diluent that step (1) prepares forms by following mass parts:
100 parts, gasoline,
X-4 amino paint diluent 23 parts,
Zinc dialkyl dithiophosphate 10 parts,
Diethylene glycol ethylmethyl ether 7 parts,
Methylisobutylketone 4 parts,
Isopropyl alcohol 6 parts,
Pyrroles 5 parts,
Polyvinyl alcohol 5 parts,
Diethylene glycol dimethyl ether 11 parts,
Dichloroethanes 11 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410846034.2A CN104475312A (en) | 2014-12-31 | 2014-12-31 | Spraying protecting method before drawing and forming of automobile sheet metal part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410846034.2A CN104475312A (en) | 2014-12-31 | 2014-12-31 | Spraying protecting method before drawing and forming of automobile sheet metal part |
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| CN104475312A true CN104475312A (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410846034.2A Pending CN104475312A (en) | 2014-12-31 | 2014-12-31 | Spraying protecting method before drawing and forming of automobile sheet metal part |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130204A (en) * | 1995-03-02 | 1996-09-04 | 湘潭市南方高新技术研究所 | Perlatolic polyester furniture paint |
| CN101422772A (en) * | 2008-12-10 | 2009-05-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Paints protection method before drawing and forming sheet metal parts |
| CN101570077A (en) * | 2009-05-15 | 2009-11-04 | 张锐 | Corrosion-resistant hardware and preparation method thereof |
| CN103738812A (en) * | 2013-12-13 | 2014-04-23 | 广东升达电梯有限公司 | Production process for novel lift car with changeable colors |
-
2014
- 2014-12-31 CN CN201410846034.2A patent/CN104475312A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130204A (en) * | 1995-03-02 | 1996-09-04 | 湘潭市南方高新技术研究所 | Perlatolic polyester furniture paint |
| CN101422772A (en) * | 2008-12-10 | 2009-05-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Paints protection method before drawing and forming sheet metal parts |
| CN101570077A (en) * | 2009-05-15 | 2009-11-04 | 张锐 | Corrosion-resistant hardware and preparation method thereof |
| CN103738812A (en) * | 2013-12-13 | 2014-04-23 | 广东升达电梯有限公司 | Production process for novel lift car with changeable colors |
Non-Patent Citations (1)
| Title |
|---|
| 王泳厚等: "《涂料防腐蚀技术300问》", 30 September 1995 * |
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Application publication date: 20150401 |