CN1132124A

CN1132124A - Lubricating method of cold stamping and stretching process

Info

Publication number: CN1132124A
Application number: CN 95121306
Authority: CN
Inventors: 王开贵
Original assignee: JINMA DIESEL ENGINE GENERAL PLANT YUNNAN PROV
Current assignee: JINMA DIESEL ENGINE GENERAL PLANT YUNNAN PROV
Priority date: 1995-12-23
Filing date: 1995-12-23
Publication date: 1996-10-02

Abstract

A lubrication method for cold stamping and drawing features use of thermoplastic plastics of artificially synthetic high-molecular organic compound as solid lubricant. In the condition of cold stamping and drawing movement, the toughness of said solid lubricant can resist pull and can extend with material and its anti-press nature can make it play the role of liner and antiwear. Its advantages are stable lubrication and no pollution.

Description

The lubricating method of cold stamping and stretching process

The present invention relates to the mechanical lubrication technology, specifically the lubricating method of cold stamping and stretching process.

In cold stamping and stretching process, existing lubricant applications has machine oil No. 46, No. 68.For the small-sized single cylinder diesel engine oil sump, adopt daily output or Baosteel to produce δ 1 cold stretch steel plate as the product raw material, the technology percent defective index request of its cold stamping and stretching process is about 3 ‰.And when adopting lubricating oil as lubricant, actual percent defective always occupy about 8-9%.According to the production Technology requirement, under the situation that lubricating oil and product meet with the primary standard steel, still can not reach the requirement of technical indicator, under the situation of remover apparatus and mould and die accuracy and operational issue, also still like this again.If the cold rolling stretching steel plate that does not adopt daily output or Baosteel to produce is the product raw material, and produce 08A1 stretching steel plate with Wuhan Iron and Steel Plant, use No. 46 or No. 68 machine oils carry out cold stamping and stretching process production, percent defective is then up to 45%.

The objective of the invention is to make the minimum level of reducing to of percent defective in the cold stamping and stretching process, reach the reduction product cost, increase economic efficiency, thereby a kind of lubricating method of cold stamping and stretching process is provided.

The present invention is achieved in that in cold stamping and stretching process thermoplastic with artificial synthetic high polymer organic compound is as kollag.Specifically can adopt thermoplastic is that polyvinyl chloride, sealed polyethylene plastic are as kollag.

Its molecular weight of thermoplastic of artificial synthetic high polymer organic compound is tens between the hundreds of thousands, and molecular structure is the folding shape of long-chain, and vitrification point is 80-85 ℃, 25-80 ℃ of deliquescing, has plasticity in the time of 120-150 ℃, and stretch modulus is bigger.It is applied in the cold stamping and stretching process, because it has the tensile toughness that machine oil can not produce, can in the middle of punch-die and product material punching press, play balanced liner effect, when the stretching piece surface rubs thermogenetic temperature when occurring in 40-50 ℃, under the toughness effect, unlikelyly resemble instantaneous being extruded the mechanical lubrication and run off, but under normal circumstances, the liner effect is more intactly played in the effect of its toughness.Part material with processing is out of shape and finishes technical process, both can thoroughly eliminate dry condition, can reduce the resistance of friction again.Compare with liquid machine lubricating oil, its performance can be comprehensively for having tensile toughness, and with the workpiece extensibility, the ability that is hit is strong, the peculiar function of wearability and self lubricity excellence.The effect that perfect machine oil is not had in cold stamping and stretching process makes the production of this technology more scientific and reasonable.

The invention will be further described below in conjunction with embodiment:

Example 1, selecting specification for use is 0.01 * 1000 polyethylene agricultural plastic film, 1000 grams (thickness is 0.01), it is that 900 * 500 specification is posted on other the part surface that the film altar is cut out, and pastes pellicular front and feeds on the die working face, does not have the reconditioning mould in the whole process of production.260 of the drain pans of producing oil that so successfully stretch, none part waste product.

Example 2, according to the monolateral gap of the drawing die only specification requirement of 1-1.1 and the surface accuracy situation (IIA) of part material, select polyethylene agricultural plastic film 1650 gram of 0.005 * 800 specification for use, be cut into 900 * 400 and be attached on other the part material, but drawing oil drain pan 890 of parts in addition.A waste product do not occur, and product quality improves obviously, also reconditioning tool not.

In actual applications, the film that adopts 0.005 * 800 specification is as solid lubrication, and from produce 37000 products, its drawing process percent defective is zero.Do not repair a die tool and adjust mould owing to do not need to grind regularly, order of classes or grades at school output is brought up to more than 2500 by original 500-600 spare, effectively improves order of classes or grades at school output rate 4-5 doubly, and per thousand products consume only 2 kilograms of films, single-piece consumes to lubricate takes 0.023 yuan, takes than former parcel received oil consumption and reduces by 0.227 yuan.

Daily output and the Baosteel cold stretch steel plate with reference to Japanese SPCD standard production is used in oil lubrication originally without exception, unit product price of steel product difference is 0.425 yuan, only with the different of lubriation material and not the same with steel, unit product can be saved 0.65 yuan of input cost (0.225+0.425), former is number % with its technology percent defective of OIL IN LUBRICATING OIL PRODUCTION, every product will be shared 1.66 yuan waste product consumption, and be zero with the solid lubrication technology percent defective, can reduce cost again and drop into 1.66 yuan of part products, comprehensive every consumption reduction spare product can save Zhi Chengben and drop into (0.65+1.66) 2.31 yuan.Add that production efficiency improves 4-5 doubly, the part product can save Zhi Chengben and drop into more than 2.50 yuan.

Solid lubrication method of the present invention is compared with the application of hydrodynamic lubrication in cold stamping and stretching process of prior art, has following characteristics:

1, to the attachment surface rate equilibrium of cold stamping and stretching process product material therefor, both easily attached But easily the piece surface after be shaped remove;

2, the solid effect is strong, under the moving condition of punching stretch, and its tough performance tension, Attachment material extension everywhere, resistance to pressure make it produce liner effect and wear-resisting, in whole punching Press in the drawing process process lubricated stable;

3, easy to operate, according to the material of different sizes, select corresponding film for use, save time than brush lubricating oil, and than the easy storage of fluid, transportation;

4, pollution-free to frock, equipment, environment and operating personnel;

5, more than the lubriation material specification, price low (every oil sump need consume 0.25 yuan of lubricated expense, and only needs 0.023 yuan with film);

6, energy reduce part material more satisfactoryly and simulate between the tool and rub, and reduces the stress in the metal, can reduce drawing coefficient and tensile force simultaneously, slows down the wearing and tearing on mold work surface preferably;

Generally speaking, the series effect that its overall characteristic produced be engine oil lubrication can not compare.

Claims

1, a kind of lubricating method of cold stamping and stretching process is characterized in that in cold stamping and stretching process thermoplastic with artificial synthetic high polymer organic compound is as kollag.

2, method according to claim 1 is characterized in that thermoplastic is polyvinyl chloride, sealed polyethylene plastic.