Solid lubricating film for aluminum alloy sheet stamping forming and preparation method thereof

An aluminum alloy sheet, stamping forming technology, applied in the direction of lubricating composition, petroleum industry, coating, etc., can solve the problem that the lubricating performance of aluminum alloy stamping is not evaluated in depth, the dispersibility of lubricant imparting agent is neglected, and the surface quality of formed parts is affected. and other problems, to achieve the effect of excellent protection ability, less residue, and excellent stamping lubrication performance

Active Publication Date: 2018-12-21
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, CN1309556C discloses a kind of alkali-soluble polyurethane water-based lubricating film containing carboxyl or sulfonic acid groups. Although the lubricating film can provide good lubricating performance, it is limited in application and stamping of aluminum alloy sheets. When the lubricating film is removed, because the aluminum alloy is easy to react with the alkali solution, the surface of the formed part will be corroded, which will affect the surface quality of the formed part. In addition, the dispersibility of the lubricating agent is also ignored.
In terms of the lubrication of aluminum alloy plates, CN102808169A discloses a method for lubricating aluminum alloys. On the basis of phosphating treatment of aluminum alloys, the method is placed in fatty sodium to form a layer of sodium stearate as a lubricant, although the The method improves the binding force between the phosphating layer and the substrate, but the treatment method is complicated and cumbersome, and the stamping lubrication performance of the processed aluminum alloy has not been evaluated in depth

Method used

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  • Solid lubricating film for aluminum alloy sheet stamping forming and preparation method thereof
  • Solid lubricating film for aluminum alloy sheet stamping forming and preparation method thereof
  • Solid lubricating film for aluminum alloy sheet stamping forming and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0038] Preparation of solid lubricating film

[0039] The surface of the aluminum alloy punching cup sample plate is degreased, washed and dried.

[0040] After adding the lubricating agent A and the wetting and dispersing agent C to the elastic organic coating B, add the selected diluent and defoamer, and mix by mechanical stirring. The weight percentage of each component meets the scope of the present invention. There is no special limitation on the coating method of the solid lubricant of the present invention, dipping method, spraying method and other methods can be used, and it should be noted that the coating thickness is between 5-35 microns.

[0041] After coating, the lubricant needs to be dried and solidified. After it is surface-dried, it is cured at a temperature of 40-60°C for 4-6 hours to obtain an aluminum alloy punching cup sample coated with a solid lubricating film. figure 1 Schematic diagram of the structure of an aluminum alloy punching cup sample coated w...

Embodiment 1

[0050]The lubricating imparting agent is selected as polytetrafluoroethylene particles with an average particle size of 2.8 microns, and the number of parts by mass is selected as 10 parts; the elastic organic coating is selected as polyurethane, and the number of parts by mass is selected as 88.5 parts; the wetting and dispersing agent is selected as Disponer904S, and the number of parts by mass is selected as 1 part, Defom 6500 is selected as the defoamer, and the mass fraction is selected as 0.5 part. The prepared solid lubricating film was coated on the same aluminum alloy disc sample as the comparative example to carry out the punching cup test. The dispersion of the lubricant imparting agent was detected by the Micromeasure2 white light confocal three-dimensional topography instrument produced by the French STIL company. The detection parameters were scanning area: 1mm×1mm; step size: 2μm×5μm; light pen depth of field: 300μm, the results are as follows image 3 As shown,...

Embodiment 2

[0054] The lubricating imparting agent is selected as polytetrafluoroethylene particles with an average particle size of 2.8 microns, and the mass parts are selected as 15 parts; the elastic organic coating is selected as polyurethane, and the mass parts are selected as 83.5 parts; the wetting and dispersing agent is selected as Disponer904S, and the mass parts are selected as 1 part, Defom 6500 is selected as the defoamer, and 0.5 parts by mass. The prepared solid lubricating film was coated on the same aluminum alloy disc sample as the comparative example to carry out the punching cup test. The dispersion of the lubricant imparting agent is detected by the Micromeasure2 white light confocal three-dimensional topography instrument produced by STIL company in France. The detection parameters are scanning area: 1mm×1mm; step size: 2μm×5μm; light pen depth of field: 300μm, the results are as follows Figure 5 As shown, the stamping pressure stroke curves of this embodiment and C...

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Abstract

The invention discloses a solid lubricating film for aluminum alloy sheet stamping forming and a preparation method thereof. The solid lubricating film is prepared from a lubricating property imparting agent A, an elastic organic coating material B as a lubricating imparting agent binder, and a wetting dispersant C used for improving the lubricating property imparting agent A, wherein the weight parts of the lubricating property imparting agent A, the elastic organic coating material B, and the wetting dispersant C are respectively 5 to 20 parts, 80 to 95 parts, and 0.2 to 2 parts. In addition, according to the preparation method of the solid lubricating film disclosed by the invention, a solid lubricating film component and a diluent are mechanically mixed according to a specific ratio toobtain a precursor fluid; the precursor fluid is sprayed or brushed on the surface of a material to be lubricated, and the solid lubricating film is formed at a specific temperature in a specific time. The lubricating film has excellent lubricity and easy removal; when stamping forming is performed, the lubricating film provides lubrication and protects the surfaces of a sheet and a mold, and theformed part has excellent surface quality.

Description

technical field [0001] The invention relates to a solid lubricating film for stamping and forming of aluminum alloy plates and a preparation method thereof. The lubricating film is pre-coated on both sides of the aluminum alloy sheet to provide lubrication during stamping, and can effectively protect the surface of the sheet and the mold, improve the surface quality of the formed part, and reduce the stamping force and the wear of the mold. Background technique [0002] With the application of aluminum alloy panels in the automotive field more and more widely, the lubrication technology of stamping processing has also received more and more attention. During the stamping process, the aluminum alloy sheet forms an extremely complex friction system with the surface of the mold. The aluminum alloy sheet has poorer plasticity than the steel sheet, and the surface activity of the base metal is strong, so it is very easy for the mold to stick, hinder the plastic deformation of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C09D175/04C09D7/65C10N30/06C10N50/08C10N40/24
CPCC09D7/65C09D175/04C10M169/041C10M169/044C10M2209/102C10M2217/045C10M2217/044C10M2213/062C10M2205/022C10M2201/066C10M2229/04C10N2030/06C10N2040/24C10N2040/244C10N2050/08
Inventor 段海涛李健尹晓阳凃杰松顾卡丽詹胜鹏贾丹
Owner WUHAN RES INST OF MATERIALS PROTECTION
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