CN111906206B - Ultrathin seal head stamping process - Google Patents

Abstract

The invention relates to the technical field of stamping, in particular to an ultrathin seal head stamping process, which comprises the following steps: step 1, preheating; step 2, processing a mould; step 3, punching for the first time; step 4, heating treatment; step 5, stamping again; step 6, cooling treatment; step 7, cleaning and passivating; step 8, drying; and 9, surface treatment. The invention solves the problems that in the stamping and demoulding process, a plurality of small holes are easy to appear on the surface of the end socket, and secondly, the abrasion resistance and the corrosion resistance of the end socket are poor and the service life of the end socket is short due to insufficient surface treatment after stamping. The process can effectively improve the surface protection effect, avoid the influence of surface damage on the internal texture stability, greatly improve the quality of the stamping product and ensure the safety and stability of production and processing.

Description

Ultrathin seal head stamping process

Technical Field

The invention relates to the technical field of stamping, in particular to an ultrathin seal head stamping process.

Background

The end enclosure belongs to one of boiler parts in pressure container. Are typically used at both ends of the pressure vessel. Also a welded pipe product for use in plugging the end of a pipe. Compared with the common end socket, the ultrathin end socket has higher preparation difficulty, and needs more precise process operation in the preparation process. However, due to the limitation of the process in the existing end socket stamping, the obtained end socket often has certain problems, firstly, in the stamping and demolding process, small holes are easy to appear on the surface of the end socket, the appearance is affected, and secondly, because the surface treatment after the stamping is finished is not enough, the wear resistance and the corrosion resistance of the end socket are poor, and the service life is short.

Disclosure of Invention

Aiming at the problems, the invention provides a stamping process of an ultrathin seal head, which comprises the following steps:

step 1, preheating treatment: placing the end socket to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and then treating for 0.1-0.5 h at 90-120 ℃ to obtain a treated female die and a treated male die;

step 3, first stamping: placing the preheated end socket blank in the processed female die, pressing down the processed male die for stamping to obtain an end socket blank connected with the female die;

step 4, heating treatment: the end socket blank treated in the step 3 and the female die are integrally subjected to heat treatment at 180-200 ℃ for 0.1-0.5 h;

and 5, stamping again: pressing down the male die again to punch and form the end socket blank subjected to the heating treatment in the step (4);

and 6, cooling treatment: taking the end socket blank processed in the step 5 out of the female die, and performing air cooling treatment;

and 7, cleaning and passivating: cleaning the end socket blank cooled in the step 6 by using a cleaning agent, and then washing by using high-pressure water;

and step 8, drying: drying the end socket blank cleaned and passivated in the step 7 at 80-100 ℃;

step 9, surface treatment: and (4) uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step (8), drying again, and naturally cooling to obtain the ultrathin end socket finished product.

Preferably, the speed of the first stamping in the step 3 is 0.2-0.5 mm/s.

Preferably, the speed of the secondary stamping in the step 5 is 0.15-0.2 mm/s.

Preferably, the air cooling speed in the step 6 is 0.2-0.5 m/s.

Preferably, the high-pressure water pressure in the step 7 is 15-20 MPa.

Preferably, in the step 9, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

Preferably, the release agent consists of the following components in parts by weight:

10-20 parts of polyether modified silicone oil, 1-10 parts of liquid paraffin, 1-5 parts of alkylphenol polyoxyethylene, 2-10 parts of carbonized modified polyimide, 0.1-0.3 part of trialkyl melamine and 20-40 parts of deionized water.

Preferably, the preparation method of the carbonized modified polyimide comprises the following steps:

s1, weighing pyromellitic dianhydride and p-phenylenediamine, adding the weighed pyromellitic dianhydride and p-phenylenediamine into N, N-dimethylformamide, stirring the mixture uniformly, introducing inert gas serving as protective gas, and stirring the mixture at room temperature for reaction for 2-10 hours to obtain a polyimide precursor solution;

wherein the mass ratio of pyromellitic anhydride to p-phenylenediamine to N, N-dimethylformamide is 1: 1.2-1.8: 5-10;

s2, adding tantalum ethoxide into the polyimide precursor solution, stirring uniformly, adding into a closed mold, heating to 200-300 ℃ under the protection of inert gas, and curing and molding to obtain modified polyimide;

wherein the mass ratio of the tantalum ethoxide to the polyimide precursor solution is 1: 5-12;

s3, adding the modified polyimide into a high-temperature furnace, heating to 1300-1500 ℃ under the protection of nitrogen, and carrying out heat treatment for 3-8 h to obtain the carbonized modified polyimide.

Preferably, the cleaning agent consists of the following components in parts by weight:

1-10 parts of sodium hydroxide, 1-10 parts of sodium carbonate, 0.5-5 parts of fatty alcohol-polyoxyethylene ether, 0.5-5 parts of sodium dodecyl sulfate, 1-5 parts of nonylphenol polyoxyethylene ether and 1-5 parts of coconut oil fatty acid.

Preferably, the cleaning agent and water are mixed and prepared according to the mass ratio of 1: 10-20.

Preferably, the metal surface treatment agent consists of the following components in parts by weight:

10-20 parts of graphene oxide coated modified zirconium silicate, 5-10 parts of vinyl trimethoxy silane, 5-10 parts of boron nitride organic composite material, 2-5 parts of fluoboric acid, 1-5 parts of titanium dioxide and 20-40 parts of deionized water.

Preferably, the preparation method of the graphene oxide coated modified zirconium silicate comprises the following steps:

s1, weighing sulfanilamide, adding the sulfanilamide into deionized water, heating to 70-80 ℃, stirring until the sulfanilamide is completely dissolved, adding vinyltriethoxysilane and zirconium silicate powder, stirring to react for 2-5 hours, cooling to room temperature, filtering to obtain a solid, washing with boiling water for three times, and drying at 90-120 ℃ for 5-8 hours to obtain modified zirconium silicate;

wherein the mass ratio of sulfanilamide, vinyl triethoxysilane, zirconium silicate powder to deionized water is 1: 0.05-0.1: 2-5: 5-10;

s2, weighing graphene oxide, adding the graphene oxide into deionized water, ultrasonically dispersing until the graphene oxide is uniform, adding the modified zirconium silicate, stirring until the graphene oxide is uniform, pouring the mixture into a reaction kettle, heating to 120-150 ℃, sealing for reaction for 6-10 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water, and drying at 90-120 ℃ for 5-8 hours to obtain graphene oxide coated modified zirconium silicate;

the mass ratio of the graphene oxide to the modified zirconium silicate to the deionized water is 1: 1-2: 5-10.

Preferably, the preparation method of the boron nitride organic composite material comprises the following steps:

s1, weighing methyl methacrylate, adding the methyl methacrylate into xylene, adding N-methyl pyrrolidone, stirring until the mixture is uniform, adding benzoyl peroxide, slowly heating to 70-80 ℃, stirring for reacting for 2-3 hours, continuously heating to 90-100 ℃, stirring for reacting for 3-5 hours, and cooling to room temperature to obtain a prepolymerization reaction liquid;

wherein the mass ratio of the methyl methacrylate to the N-methyl pyrrolidone to the benzoyl peroxide to the xylene is 1: 0.2-0.5: 2-4: 10-12;

s2, adding the prepolymerization reaction liquid into a rotary evaporation instrument, removing a solvent by rotary evaporation, pouring the solution into 0.1mol/L hydrochloric acid solution, quickly stirring the solution to be uniform, standing the solution at room temperature for 8-10 hours, washing the solution to be neutral by using deionized water, washing the solution for three times by using ethanol, and drying the solution under reduced pressure to obtain modified polymethyl methacrylate;

wherein the volume ratio of the prepolymerization reaction liquid to the hydrochloric acid solution is 1: 3-10;

s3, weighing the modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane, adding the weighed modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane into N, N-dimethylformamide, stirring and dispersing the mixture uniformly, adding boron nitride nanoparticles, stirring the mixture uniformly again, heating the mixture to 40-50 ℃, stirring the mixture for reaction for 5-8 hours, then using ethanol for sedimentation, filtering the mixture to obtain a solid, using the ethanol for washing the solid for three times, and drying the solid under reduced pressure to obtain the boron nitride organic composite material;

the mass ratio of the modified polymethyl methacrylate, the vinyl tri (beta-methoxyethoxy) silane, the boron nitride nanoparticles and the N, N-dimethylformamide is 1: 0.01-0.05: 1.2-1.8: 3-6.

The invention has the beneficial effects that:

1. the invention provides an ultrathin seal head stamping process, which can improve the stability and corrosion resistance of a seal head through reasonable process steps. The mold release agent is smeared in the mold during mold making, so that the separation of the seal head and the mold is more convenient, the mold and the seal head are subjected to heat treatment before stamping, the stamping stability is ensured, meanwhile, the cleaning liquid treatment and the metal surface treatment are combined, the surface protection effect can be effectively improved, the influence on the internal texture stability caused by surface damage is avoided, the quality of a stamped product can be greatly improved, and the safety stability of production and processing is ensured.

2. Polyimide belongs to nontoxic resin, has good high-temperature bonding strength, can be carbonized at high temperature to form a carbon network structure, can stand higher temperature, releases less toxic gas, and is suitable for being used as a component of a release agent. However, the carbon structure formed after the phenol resin is carbonized is amorphous carbon, the graphitization crystallization degree of the amorphous carbon is low, the amorphous carbon is easy to oxidize, the brittleness is high, and the demolding effect is not good in the using process. Therefore, the tantalum ethoxide is added into the prepared polyimide precursor solution and is cured and molded together with the precursor to obtain the modified polyimide, so that the tantalum ethoxide can be uniformly dispersed in the polyimide and can be grafted on the surface of polyimide molecules in a high-temperature curing process. Then, the polyimide is carbonized at high temperature under the protection of nitrogen, the existence of tantalum element can improve the high-temperature carbonization structure of the polyimide, so that the polyimide can generate more reticular structures of carbon nanotubes or carbon nanofibers in the high-temperature carbonization process, and the toughness and the impact resistance of the carbonized polyimide are improved; in addition, because tantalum element and nitrogen element can form tantalum nitride under the existence condition of high-temperature nitrogen, the tantalum nitride is a black hexagonal crystal which is high-temperature resistant, corrosion resistant and wear resistant, the tensile strength of the carbonized polyimide can be further improved, and the carbonized polyimide is not easy to polish when being contacted with a punching product. In addition, after the modified polyimide is carbonized, the condition that the release agent component is decomposed or evaporated due to heating can be reduced, and the residual quantity of lubricating components in a die is ensured, so that the common porous problem of stamping and demolding is solved.

3. The phosphating technology is a method generally adopted for metal surface treatment before coating at present, but because a phosphating agent contains a large amount of phosphorus and nitrogen, serious pollution can be brought to the environment, and heavy metals contained in the phosphating agent can also cause permanent damage to a human body, the invention prepares the environment-friendly metal surface treating agent.

According to the invention, the graphene oxide coated modified zirconium silicate is added into the metal surface treating agent, so that the effect of reducing corrosion can be achieved. The preparation method specifically comprises the steps of modifying zirconium silicate by using sulfanilamide to obtain modified zirconium silicate, and then coating and grafting graphene oxide to obtain the graphene oxide coated modified zirconium silicate. The modified zirconium silicate surface is added with more active functional groups, and the functional groups can generate chelation with the surface of a substrate, so that insoluble and stable chelates are formed on the surface of the substrate and can be used as a barrier for isolating water and ions, and the substrate is prevented from electrochemical corrosion; meanwhile, after the modified zirconium silicate is wrapped by the graphene oxide and coated on the surface of the metal, the graphene oxide can provide other paths for electrons to pass, so that the electrons cannot reach the position of the cathode, and the function of corrosion prevention is further achieved.

4. The invention also adds boron nitride organic composite material into the metal surface treating agent, and the material is organic-inorganic composite material with self-repairing function. The organic part is obtained by modifying on the basis of polymethyl methacrylate with higher mechanical strength and toughness, the N-methyl pyrrolidone and the acid washing step are added in the synthetic process of the polymethyl methacrylate, the self-repairing function of the polymethyl methacrylate is enhanced, and then boron nitride nanoparticles are doped to improve the hardness of the surface of the polymethyl methacrylate. In the boron nitride organic composite material, the modified polymethyl methacrylate can form a three-dimensional network structure, and boron nitride is filled in gaps of the network structure, so that when the film is scratched or mechanically damaged, the nearby film can be slowly transferred to the damaged part, and the repair is finished. Therefore, the finally obtained boron nitride organic composite material not only has a self-repairing function, but also is more wear-resistant, so that the service life of the end socket is further prolonged.

Detailed Description

The invention is further described with reference to the following examples.

Example 1

A stamping process of an ultrathin seal head comprises the following steps:

step 1, preheating treatment: placing the end socket to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and then treating for 0.1-0.5 h at 90-120 ℃ to obtain a treated female die and a treated male die;

step 3, first stamping: placing the preheated end socket blank in the processed female die, pressing down the processed male die for stamping to obtain an end socket blank connected with the female die;

step 4, heating treatment: the end socket blank treated in the step 3 and the female die are integrally subjected to heat treatment at 180-200 ℃ for 0.1-0.5 h;

and 5, stamping again: pressing down the male die again to punch and form the end socket blank subjected to the heating treatment in the step (4);

and 6, cooling treatment: taking the end socket blank processed in the step 5 out of the female die, and performing air cooling treatment;

and 7, cleaning and passivating: cleaning the end socket blank cooled in the step 6 by using a cleaning agent, and then washing by using high-pressure water;

and step 8, drying: drying the end socket blank cleaned and passivated in the step 7 at 80-100 ℃;

step 9, surface treatment: and (4) uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step (8), drying again, and naturally cooling to obtain the ultrathin end socket finished product.

And the speed of the first stamping in the step 3 is 0.2-0.5 mm/s.

And the speed of secondary stamping in the step 5 is 0.15-0.2 mm/s.

And the air cooling speed in the step 6 is 0.2-0.5 m/s.

And in the step 7, the high-pressure water pressure is 15-20 MPa.

In the step 9, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

The release agent comprises the following components in parts by weight:

15 parts of polyether modified silicone oil, 5 parts of liquid paraffin, 3 parts of alkylphenol polyoxyethylene, 6 parts of carbonized modified polyimide, 0.2 part of trialkyl melamine and 30 parts of deionized water.

The preparation method of the carbonized modified polyimide comprises the following steps:

s1, weighing pyromellitic dianhydride and p-phenylenediamine, adding the weighed pyromellitic dianhydride and p-phenylenediamine into N, N-dimethylformamide, stirring the mixture uniformly, introducing inert gas serving as protective gas, and stirring the mixture at room temperature for reaction for 2-10 hours to obtain a polyimide precursor solution;

wherein the mass ratio of pyromellitic anhydride to p-phenylenediamine to N, N-dimethylformamide is 1: 1.2-1.8: 5-10;

s2, adding tantalum ethoxide into the polyimide precursor solution, stirring uniformly, adding into a closed mold, heating to 200-300 ℃ under the protection of inert gas, and curing and molding to obtain modified polyimide;

wherein the mass ratio of the tantalum ethoxide to the polyimide precursor solution is 1: 5-12;

s3, adding the modified polyimide into a high-temperature furnace, heating to 1300-1500 ℃ under the protection of nitrogen, and carrying out heat treatment for 3-8 h to obtain the carbonized modified polyimide.

The cleaning agent comprises the following components in parts by weight:

5 parts of sodium hydroxide, 6 parts of sodium carbonate, 3 parts of fatty alcohol-polyoxyethylene ether, 3 parts of lauryl sodium sulfate, 2 parts of nonylphenol polyoxyethylene ether and 3 parts of coconut oil fatty acid.

The cleaning agent and water are mixed and prepared according to the mass ratio of 1: 10-20.

The metal surface treating agent comprises the following components in parts by weight:

15 parts of graphene oxide coated modified zirconium silicate, 8 parts of vinyl trimethoxy silane, 7 parts of boron nitride organic composite material, 3.5 parts of fluoboric acid, 3 parts of titanium dioxide and 30 parts of deionized water.

The preparation method of the graphene oxide coated modified zirconium silicate comprises the following steps:

s1, weighing sulfanilamide, adding the sulfanilamide into deionized water, heating to 70-80 ℃, stirring until the sulfanilamide is completely dissolved, adding vinyltriethoxysilane and zirconium silicate powder, stirring to react for 2-5 hours, cooling to room temperature, filtering to obtain a solid, washing with boiling water for three times, and drying at 90-120 ℃ for 5-8 hours to obtain modified zirconium silicate;

wherein the mass ratio of sulfanilamide, vinyl triethoxysilane, zirconium silicate powder to deionized water is 1: 0.05-0.1: 2-5: 5-10;

s2, weighing graphene oxide, adding the graphene oxide into deionized water, ultrasonically dispersing until the graphene oxide is uniform, adding the modified zirconium silicate, stirring until the graphene oxide is uniform, pouring the mixture into a reaction kettle, heating to 120-150 ℃, sealing for reaction for 6-10 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water, and drying at 90-120 ℃ for 5-8 hours to obtain graphene oxide coated modified zirconium silicate;

the mass ratio of the graphene oxide to the modified zirconium silicate to the deionized water is 1: 1-2: 5-10.

The preparation method of the boron nitride organic composite material comprises the following steps:

s1, weighing methyl methacrylate, adding the methyl methacrylate into xylene, adding N-methyl pyrrolidone, stirring until the mixture is uniform, adding benzoyl peroxide, slowly heating to 70-80 ℃, stirring for reacting for 2-3 hours, continuously heating to 90-100 ℃, stirring for reacting for 3-5 hours, and cooling to room temperature to obtain a prepolymerization reaction liquid;

wherein the mass ratio of the methyl methacrylate to the N-methyl pyrrolidone to the benzoyl peroxide to the xylene is 1: 0.2-0.5: 2-4: 10-12;

s2, adding the prepolymerization reaction liquid into a rotary evaporation instrument, removing a solvent by rotary evaporation, pouring the solution into 0.1mol/L hydrochloric acid solution, quickly stirring the solution to be uniform, standing the solution at room temperature for 8-10 hours, washing the solution to be neutral by using deionized water, washing the solution for three times by using ethanol, and drying the solution under reduced pressure to obtain modified polymethyl methacrylate;

wherein the volume ratio of the prepolymerization reaction liquid to the hydrochloric acid solution is 1: 3-10;

s3, weighing the modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane, adding the weighed modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane into N, N-dimethylformamide, stirring and dispersing the mixture uniformly, adding boron nitride nanoparticles, stirring the mixture uniformly again, heating the mixture to 40-50 ℃, stirring the mixture for reaction for 5-8 hours, then using ethanol for sedimentation, filtering the mixture to obtain a solid, using the ethanol for washing the solid for three times, and drying the solid under reduced pressure to obtain the boron nitride organic composite material;

the mass ratio of the modified polymethyl methacrylate, the vinyl tri (beta-methoxyethoxy) silane, the boron nitride nanoparticles and the N, N-dimethylformamide is 1: 0.01-0.05: 1.2-1.8: 3-6.

Example 2

A stamping process of an ultrathin seal head comprises the following steps:

step 1, preheating treatment: placing the end socket to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and then treating for 0.1-0.5 h at 90-120 ℃ to obtain a treated female die and a treated male die;

step 3, first stamping: placing the preheated end socket blank in the processed female die, pressing down the processed male die for stamping to obtain an end socket blank connected with the female die;

step 4, heating treatment: the end socket blank treated in the step 3 and the female die are integrally subjected to heat treatment at 180-200 ℃ for 0.1-0.5 h;

and 5, stamping again: pressing down the male die again to punch and form the end socket blank subjected to the heating treatment in the step (4);

and 6, cooling treatment: taking the end socket blank processed in the step 5 out of the female die, and performing air cooling treatment;

and 7, cleaning and passivating: cleaning the end socket blank cooled in the step 6 by using a cleaning agent, and then washing by using high-pressure water;

and step 8, drying: drying the end socket blank cleaned and passivated in the step 7 at 80-100 ℃;

step 9, surface treatment: and (4) uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step (8), drying again, and naturally cooling to obtain the ultrathin end socket finished product.

And the speed of the first stamping in the step 3 is 0.2-0.5 mm/s.

And the speed of secondary stamping in the step 5 is 0.15-0.2 mm/s.

And the air cooling speed in the step 6 is 0.2-0.5 m/s.

And in the step 7, the high-pressure water pressure is 15-20 MPa.

In the step 9, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

The release agent comprises the following components in parts by weight:

10 parts of polyether modified silicone oil, 1 part of liquid paraffin, 1 part of alkylphenol polyoxyethylene, 2 parts of carbonized modified polyimide, 0.1 part of trialkyl melamine and 20 parts of deionized water.

The preparation method of the carbonized modified polyimide comprises the following steps:

s1, weighing pyromellitic dianhydride and p-phenylenediamine, adding the weighed pyromellitic dianhydride and p-phenylenediamine into N, N-dimethylformamide, stirring the mixture uniformly, introducing inert gas serving as protective gas, and stirring the mixture at room temperature for reaction for 2-10 hours to obtain a polyimide precursor solution;

wherein the mass ratio of pyromellitic anhydride to p-phenylenediamine to N, N-dimethylformamide is 1: 1.2-1.8: 5-10;

s2, adding tantalum ethoxide into the polyimide precursor solution, stirring uniformly, adding into a closed mold, heating to 200-300 ℃ under the protection of inert gas, and curing and molding to obtain modified polyimide;

wherein the mass ratio of the tantalum ethoxide to the polyimide precursor solution is 1: 5-12;

s3, adding the modified polyimide into a high-temperature furnace, heating to 1300-1500 ℃ under the protection of nitrogen, and carrying out heat treatment for 3-8 h to obtain the carbonized modified polyimide.

The cleaning agent comprises the following components in parts by weight:

1 part of sodium hydroxide, 1 part of sodium carbonate, 0.5 part of fatty alcohol-polyoxyethylene ether, 0.5 part of lauryl sodium sulfate, 1 part of nonylphenol polyoxyethylene ether and 1 part of coconut oil fatty acid.

The cleaning agent and water are mixed and prepared according to the mass ratio of 1: 10-20.

The metal surface treating agent comprises the following components in parts by weight:

10 parts of graphene oxide coated modified zirconium silicate, 5 parts of vinyl trimethoxy silane, 5 parts of boron nitride organic composite material, 2 parts of fluoboric acid, 1 part of titanium dioxide and 20 parts of deionized water.

The preparation method of the graphene oxide coated modified zirconium silicate comprises the following steps:

s1, weighing sulfanilamide, adding the sulfanilamide into deionized water, heating to 70-80 ℃, stirring until the sulfanilamide is completely dissolved, adding vinyltriethoxysilane and zirconium silicate powder, stirring to react for 2-5 hours, cooling to room temperature, filtering to obtain a solid, washing with boiling water for three times, and drying at 90-120 ℃ for 5-8 hours to obtain modified zirconium silicate;

wherein the mass ratio of sulfanilamide, vinyl triethoxysilane, zirconium silicate powder to deionized water is 1: 0.05-0.1: 2-5: 5-10;

s2, weighing graphene oxide, adding the graphene oxide into deionized water, ultrasonically dispersing until the graphene oxide is uniform, adding the modified zirconium silicate, stirring until the graphene oxide is uniform, pouring the mixture into a reaction kettle, heating to 120-150 ℃, sealing for reaction for 6-10 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water, and drying at 90-120 ℃ for 5-8 hours to obtain graphene oxide coated modified zirconium silicate;

the mass ratio of the graphene oxide to the modified zirconium silicate to the deionized water is 1: 1-2: 5-10.

The preparation method of the boron nitride organic composite material comprises the following steps:

s1, weighing methyl methacrylate, adding the methyl methacrylate into xylene, adding N-methyl pyrrolidone, stirring until the mixture is uniform, adding benzoyl peroxide, slowly heating to 70-80 ℃, stirring for reacting for 2-3 hours, continuously heating to 90-100 ℃, stirring for reacting for 3-5 hours, and cooling to room temperature to obtain a prepolymerization reaction liquid;

wherein the mass ratio of the methyl methacrylate to the N-methyl pyrrolidone to the benzoyl peroxide to the xylene is 1: 0.2-0.5: 2-4: 10-12;

s2, adding the prepolymerization reaction liquid into a rotary evaporation instrument, removing a solvent by rotary evaporation, pouring the solution into 0.1mol/L hydrochloric acid solution, quickly stirring the solution to be uniform, standing the solution at room temperature for 8-10 hours, washing the solution to be neutral by using deionized water, washing the solution for three times by using ethanol, and drying the solution under reduced pressure to obtain modified polymethyl methacrylate;

wherein the volume ratio of the prepolymerization reaction liquid to the hydrochloric acid solution is 1: 3-10;

s3, weighing the modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane, adding the weighed modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane into N, N-dimethylformamide, stirring and dispersing the mixture uniformly, adding boron nitride nanoparticles, stirring the mixture uniformly again, heating the mixture to 40-50 ℃, stirring the mixture for reaction for 5-8 hours, then using ethanol for sedimentation, filtering the mixture to obtain a solid, using the ethanol for washing the solid for three times, and drying the solid under reduced pressure to obtain the boron nitride organic composite material;

the mass ratio of the modified polymethyl methacrylate, the vinyl tri (beta-methoxyethoxy) silane, the boron nitride nanoparticles and the N, N-dimethylformamide is 1: 0.01-0.05: 1.2-1.8: 3-6.

Example 3

A stamping process of an ultrathin seal head comprises the following steps:

step 1, preheating treatment: placing the end socket to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and then treating for 0.1-0.5 h at 90-120 ℃ to obtain a treated female die and a treated male die;

step 3, first stamping: placing the preheated end socket blank in the processed female die, pressing down the processed male die for stamping to obtain an end socket blank connected with the female die;

step 4, heating treatment: the end socket blank treated in the step 3 and the female die are integrally subjected to heat treatment at 180-200 ℃ for 0.1-0.5 h;

and 5, stamping again: pressing down the male die again to punch and form the end socket blank subjected to the heating treatment in the step (4);

and 6, cooling treatment: taking the end socket blank processed in the step 5 out of the female die, and performing air cooling treatment;

and 7, cleaning and passivating: cleaning the end socket blank cooled in the step 6 by using a cleaning agent, and then washing by using high-pressure water;

and step 8, drying: drying the end socket blank cleaned and passivated in the step 7 at 80-100 ℃;

step 9, surface treatment: and (4) uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step (8), drying again, and naturally cooling to obtain the ultrathin end socket finished product.

And the speed of the first stamping in the step 3 is 0.2-0.5 mm/s.

And the speed of secondary stamping in the step 5 is 0.15-0.2 mm/s.

And the air cooling speed in the step 6 is 0.2-0.5 m/s.

And in the step 7, the high-pressure water pressure is 15-20 MPa.

In the step 9, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

The release agent comprises the following components in parts by weight:

20 parts of polyether modified silicone oil, 10 parts of liquid paraffin, 5 parts of alkylphenol polyoxyethylene, 10 parts of carbonized modified polyimide, 0.3 part of trialkyl melamine and 40 parts of deionized water.

The preparation method of the carbonized modified polyimide comprises the following steps:

s1, weighing pyromellitic dianhydride and p-phenylenediamine, adding the weighed pyromellitic dianhydride and p-phenylenediamine into N, N-dimethylformamide, stirring the mixture uniformly, introducing inert gas serving as protective gas, and stirring the mixture at room temperature for reaction for 2-10 hours to obtain a polyimide precursor solution;

wherein the mass ratio of pyromellitic anhydride to p-phenylenediamine to N, N-dimethylformamide is 1: 1.2-1.8: 5-10;

s2, adding tantalum ethoxide into the polyimide precursor solution, stirring uniformly, adding into a closed mold, heating to 200-300 ℃ under the protection of inert gas, and curing and molding to obtain modified polyimide;

wherein the mass ratio of the tantalum ethoxide to the polyimide precursor solution is 1: 5-12;

s3, adding the modified polyimide into a high-temperature furnace, heating to 1300-1500 ℃ under the protection of nitrogen, and carrying out heat treatment for 3-8 h to obtain the carbonized modified polyimide.

The cleaning agent comprises the following components in parts by weight:

10 parts of sodium hydroxide, 10 parts of sodium carbonate, 5 parts of fatty alcohol-polyoxyethylene ether, 5 parts of lauryl sodium sulfate, 5 parts of nonylphenol polyoxyethylene ether and 5 parts of coconut oil fatty acid.

The cleaning agent and water are mixed and prepared according to the mass ratio of 1: 10-20.

The metal surface treating agent comprises the following components in parts by weight:

20 parts of graphene oxide coated modified zirconium silicate, 10 parts of vinyl trimethoxy silane, 10 parts of boron nitride organic composite material, 5 parts of fluoboric acid, 5 parts of titanium dioxide and 40 parts of deionized water.

The preparation method of the graphene oxide coated modified zirconium silicate comprises the following steps:

s1, weighing sulfanilamide, adding the sulfanilamide into deionized water, heating to 70-80 ℃, stirring until the sulfanilamide is completely dissolved, adding vinyltriethoxysilane and zirconium silicate powder, stirring to react for 2-5 hours, cooling to room temperature, filtering to obtain a solid, washing with boiling water for three times, and drying at 90-120 ℃ for 5-8 hours to obtain modified zirconium silicate;

wherein the mass ratio of sulfanilamide, vinyl triethoxysilane, zirconium silicate powder to deionized water is 1: 0.05-0.1: 2-5: 5-10;

s2, weighing graphene oxide, adding the graphene oxide into deionized water, ultrasonically dispersing until the graphene oxide is uniform, adding the modified zirconium silicate, stirring until the graphene oxide is uniform, pouring the mixture into a reaction kettle, heating to 120-150 ℃, sealing for reaction for 6-10 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water, and drying at 90-120 ℃ for 5-8 hours to obtain graphene oxide coated modified zirconium silicate;

the mass ratio of the graphene oxide to the modified zirconium silicate to the deionized water is 1: 1-2: 5-10.

The preparation method of the boron nitride organic composite material comprises the following steps:

s1, weighing methyl methacrylate, adding the methyl methacrylate into xylene, adding N-methyl pyrrolidone, stirring until the mixture is uniform, adding benzoyl peroxide, slowly heating to 70-80 ℃, stirring for reacting for 2-3 hours, continuously heating to 90-100 ℃, stirring for reacting for 3-5 hours, and cooling to room temperature to obtain a prepolymerization reaction liquid;

wherein the mass ratio of the methyl methacrylate to the N-methyl pyrrolidone to the benzoyl peroxide to the xylene is 1: 0.2-0.5: 2-4: 10-12;

s2, adding the prepolymerization reaction liquid into a rotary evaporation instrument, removing a solvent by rotary evaporation, pouring the solution into 0.1mol/L hydrochloric acid solution, quickly stirring the solution to be uniform, standing the solution at room temperature for 8-10 hours, washing the solution to be neutral by using deionized water, washing the solution for three times by using ethanol, and drying the solution under reduced pressure to obtain modified polymethyl methacrylate;

wherein the volume ratio of the prepolymerization reaction liquid to the hydrochloric acid solution is 1: 3-10;

s3, weighing the modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane, adding the weighed modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane into N, N-dimethylformamide, stirring and dispersing the mixture uniformly, adding boron nitride nanoparticles, stirring the mixture uniformly again, heating the mixture to 40-50 ℃, stirring the mixture for reaction for 5-8 hours, then using ethanol for sedimentation, filtering the mixture to obtain a solid, using the ethanol for washing the solid for three times, and drying the solid under reduced pressure to obtain the boron nitride organic composite material;

the mass ratio of the modified polymethyl methacrylate, the vinyl tri (beta-methoxyethoxy) silane, the boron nitride nanoparticles and the N, N-dimethylformamide is 1: 0.01-0.05: 1.2-1.8: 3-6.

Comparative example

A stamping process of an ultrathin seal head comprises the following steps:

step 1, preheating treatment: placing the end socket to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and drying to obtain a processed female die and a processed male die;

step 3, stamping: placing the preheated end socket blank into the processed female die, and pressing down the processed male die to punch and form the end socket blank;

and 4, cooling treatment: taking the end socket blank processed in the step 3 out of the female die, and carrying out air cooling treatment;

step 5, cleaning and passivating: cleaning the end socket blank cooled in the step 4 by using a cleaning agent, and then washing by using high-pressure water;

and step 6, drying treatment: drying the end socket blank cleaned and passivated in the step 5 at 80-100 ℃;

step 7, surface treatment: and (4) uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step (6), drying again, and naturally cooling to obtain the ultrathin end socket finished product.

And the stamping speed in the step 3 is 0.2-0.5 mm/s.

And the air cooling speed in the step 4 is 0.2-0.5 m/s.

And in the step 5, the high-pressure water pressure is 15-20 MPa.

In the step 7, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

The release agent comprises the following components in parts by weight:

15 parts of polyether modified silicone oil, 5 parts of liquid paraffin, 3 parts of alkylphenol polyoxyethylene, 0.2 part of trialkyl melamine and 30 parts of deionized water.

The cleaning agent comprises the following components in parts by weight:

5 parts of sodium hydroxide, 6 parts of sodium carbonate, 3 parts of fatty alcohol-polyoxyethylene ether, 3 parts of lauryl sodium sulfate, 2 parts of nonylphenol polyoxyethylene ether and 3 parts of coconut oil fatty acid.

The cleaning agent and water are mixed and prepared according to the mass ratio of 1: 10-20.

The metal surface treating agent comprises the following components in parts by weight:

15 parts of zirconium silicate, 8 parts of vinyltrimethoxysilane, 7 parts of boron nitride, 3.5 parts of fluoboric acid, 3 parts of titanium dioxide and 30 parts of deionized water.

In order to more clearly illustrate the invention, the performance of the ultrathin seal heads prepared in the embodiments 1 to 3 and the comparative example is detected, wherein the surface appearance is judged by adopting an observation mode; grinding the wear rate by 500-mesh abrasive paper, wherein the grinding force is 500N, the reciprocating stroke is 2cm, the frequency is 2Hz, and the duration is 5h, and calculating the wear rate (the mass before grinding-the mass after grinding)/the mass before grinding by weighing the mass of the end socket before and after grinding; the corrosion rate is detected by soaking the end socket in acid liquor or alkali liquor for 72 h; the self-repairing rate adopts the cross shape that the surface of the end socket is drawn to be 1mm deep, the end socket is placed in an oven with the temperature of 100-150 ℃ for heat preservation for 1-2 h, the end socket is cooled to the room temperature along with the oven, and then the self-repairing condition of scratches is compared with the prior art.

The results are shown in table 1:

TABLE 1 ultra-thin end socket Performance test

As can be seen from table 1, the ultra-thin end socket prepared by the preparation process of embodiments 1 to 3 of the present invention has good appearance, and strong wear resistance, corrosion resistance and self-repairing property.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The stamping process of the ultrathin seal head is characterized by comprising the following steps of:

step 1, preheating treatment: placing the end socket blank to be punched at 200-300 ℃ for heat treatment for 0.1-0.5 h to obtain a preheated end socket blank;

step 2, mould treatment: coating a release agent on the inner surface of the female die and the outer surface of the male die of the die, and then treating at 90-120 ℃ for 0.1-0.5 h to obtain a treated female die and a treated male die;

step 3, first stamping: placing the preheated end socket blank in the processed female die, pressing down the processed male die for stamping to obtain an end socket blank connected with the female die;

step 4, heating treatment: the end socket blank treated in the step 3 and the female die are integrally subjected to heat treatment at 180-200 ℃ for 0.1-0.5 h;

and 5, stamping again: pressing down the male die again to punch and form the end socket blank subjected to the heating treatment in the step (4);

and 6, cooling treatment: taking the end socket blank processed in the step 5 out of the female die, and performing air cooling treatment;

and 7, cleaning and passivating: cleaning the end socket blank cooled in the step 6 by using a cleaning agent, and then washing by using high-pressure water;

and step 8, drying: drying the end socket blank cleaned and passivated in the step 7 at 80-100 ℃;

step 9, surface treatment: uniformly coating a metal surface treating agent on the surface of the end socket blank dried in the step 8, drying again, and naturally cooling to obtain an ultrathin end socket finished product;

the release agent comprises the following components in parts by weight:

10-20 parts of polyether modified silicone oil, 1-10 parts of liquid paraffin, 1-5 parts of alkylphenol polyoxyethylene, 2-10 parts of carbonized modified polyimide, 0.1-0.3 part of trialkyl melamine and 20-40 parts of deionized water;

the preparation method of the carbonized modified polyimide comprises the following steps:

s1, weighing pyromellitic dianhydride and p-phenylenediamine, adding the weighed pyromellitic dianhydride and p-phenylenediamine into N, N-dimethylformamide, stirring the mixture uniformly, introducing inert gas serving as protective gas, and stirring the mixture at room temperature for reaction for 2-10 hours to obtain a polyimide precursor solution;

wherein the mass ratio of pyromellitic anhydride to p-phenylenediamine to N, N-dimethylformamide is 1: 1.2-1.8: 5-10;

s2, adding tantalum ethoxide into the polyimide precursor solution, stirring uniformly, adding into a closed mold, heating to 200-300 ℃ under the protection of inert gas, and curing and molding to obtain modified polyimide;

wherein the mass ratio of the tantalum ethoxide to the polyimide precursor solution is 1: 5-12;

s3, adding the modified polyimide into a high-temperature furnace, heating to 1300-1500 ℃ under the protection of nitrogen, and carrying out heat treatment for 3-8 h to obtain the carbonized modified polyimide.

2. The stamping process of an ultrathin seal head as claimed in claim 1, wherein the speed of the first stamping in the step 3 is 0.2-0.5 mm/s; and the speed of secondary stamping in the step 5 is 0.15-0.2 mm/s.

3. The stamping process of an ultrathin seal head as claimed in claim 1, wherein in the step 9, the temperature of the secondary drying treatment is 40-60 ℃, and the drying time is 0.1-0.5 h.

4. The stamping process of an ultrathin seal head as claimed in claim 1, wherein the cleaning agent comprises the following components in parts by weight:

1-10 parts of sodium hydroxide, 1-10 parts of sodium carbonate, 0.5-5 parts of fatty alcohol-polyoxyethylene ether, 0.5-5 parts of sodium dodecyl sulfate, 1-5 parts of nonylphenol polyoxyethylene ether and 1-5 parts of coconut oil fatty acid.

5. The stamping process of an ultrathin seal head as claimed in claim 4, wherein the cleaning agent and water are mixed for use according to a mass ratio of 1: 10-20.

6. The stamping process of an ultrathin seal head as claimed in claim 1, wherein the metal surface treating agent comprises the following components in parts by weight:

10-20 parts of graphene oxide coated modified zirconium silicate, 5-10 parts of vinyl trimethoxy silane, 5-10 parts of boron nitride organic composite material, 2-5 parts of fluoboric acid, 1-5 parts of titanium dioxide and 20-40 parts of deionized water;

the preparation method of the graphene oxide coated modified zirconium silicate comprises the following steps:

s1, weighing sulfanilamide, adding the sulfanilamide into deionized water, heating to 70-80 ℃, stirring until the sulfanilamide is completely dissolved, adding vinyltriethoxysilane and zirconium silicate powder, stirring to react for 2-5 hours, cooling to room temperature, filtering to obtain a solid, washing with boiling water for three times, and drying at 90-120 ℃ for 5-8 hours to obtain modified zirconium silicate;

wherein the mass ratio of sulfanilamide, vinyl triethoxysilane, zirconium silicate powder to deionized water is 1: 0.05-0.1: 2-5: 5-10;

s2, weighing graphene oxide, adding the graphene oxide into deionized water, ultrasonically dispersing until the graphene oxide is uniform, adding the modified zirconium silicate, stirring until the graphene oxide is uniform, pouring the mixture into a reaction kettle, heating to 120-150 ℃, sealing for reaction for 6-10 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water, and drying at 90-120 ℃ for 5-8 hours to obtain graphene oxide coated modified zirconium silicate;

the mass ratio of the graphene oxide to the modified zirconium silicate to the deionized water is 1: 1-2: 5-10;

the preparation method of the boron nitride organic composite material comprises the following steps:

s1, weighing methyl methacrylate, adding the methyl methacrylate into xylene, adding N-methyl pyrrolidone, stirring until the mixture is uniform, adding benzoyl peroxide, slowly heating to 70-80 ℃, stirring for reacting for 2-3 hours, continuously heating to 90-100 ℃, stirring for reacting for 3-5 hours, and cooling to room temperature to obtain a prepolymerization reaction liquid;

wherein the mass ratio of the methyl methacrylate to the N-methyl pyrrolidone to the benzoyl peroxide to the xylene is 1: 0.2-0.5: 2-4: 10-12;

s2, adding the prepolymerization reaction liquid into a rotary evaporation instrument, removing a solvent by rotary evaporation, pouring the solution into 0.1mol/L hydrochloric acid solution, quickly stirring the solution to be uniform, standing the solution at room temperature for 8-10 hours, washing the solution to be neutral by using deionized water, washing the solution for three times by using ethanol, and drying the solution under reduced pressure to obtain modified polymethyl methacrylate;

wherein the volume ratio of the prepolymerization reaction liquid to the hydrochloric acid solution is 1: 3-10;

s3, weighing the modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane, adding the weighed modified polymethyl methacrylate and vinyl tris (beta-methoxyethoxy) silane into N, N-dimethylformamide, stirring and dispersing the mixture uniformly, adding boron nitride nanoparticles, stirring the mixture uniformly again, heating the mixture to 40-50 ℃, stirring the mixture for reaction for 5-8 hours, then using ethanol for sedimentation, filtering the mixture to obtain a solid, using the ethanol for washing the solid for three times, and drying the solid under reduced pressure to obtain the boron nitride organic composite material;

the mass ratio of the modified polymethyl methacrylate, the vinyl tri (beta-methoxyethoxy) silane, the boron nitride nanoparticles and the N, N-dimethylformamide is 1: 0.01-0.05: 1.2-1.8: 3-6.