CN114682998A - Production process of flyer presser aluminum product - Google Patents

Production process of flyer presser aluminum product Download PDF

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Publication number
CN114682998A
CN114682998A CN202210271097.4A CN202210271097A CN114682998A CN 114682998 A CN114682998 A CN 114682998A CN 202210271097 A CN202210271097 A CN 202210271097A CN 114682998 A CN114682998 A CN 114682998A
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aluminum
reaction
parts
presser finger
cutting fluid
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CN114682998B (en
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何志明
秦康
钱进
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Wuxi Zhongshi Machinery Co ltd
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Wuxi Zhongshi Machinery Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00Lubricating compositions containing more than 10% water
    • C10M173/02Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02Water
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28Esters
    • C10M2207/287Partial esters
    • C10M2207/289Partial esters containing free hydroxy groups
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/045Polyureas; Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04Phosphate esters
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/76Reduction of noise, shudder, or vibrations
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • C10N2040/22Metal working with essential removal of material, e.g. cutting, grinding or drilling
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • C10N2040/244Metal working of specific metals
    • C10N2040/245Soft metals, e.g. aluminum

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The invention discloses a production process of an aluminum part of a flyer presser finger, wherein in the production process, an aluminum ingot is made into a presser finger through aluminum melting and casting, and the presser finger is made into an aluminum component through the working procedures of polishing, dynamic balancing, paint spraying, drying and punching; and the steel is machined into a steel component matched with the aluminum component, and the aluminum component and the steel component are assembled, subjected to factory inspection, product packaging and factory leaving to obtain the flyer presser finger aluminum product. The noise-reducing cutting fluid is used in the polishing and punching procedures, the vibration energy of noise can be absorbed and converted into heat energy by the waterborne polyurethane in the noise-reducing cutting fluid, the heat energy is taken away by the cutting fluid with good heat conductivity, and the technical purpose of reducing the processing noise can be achieved through the energy conversion.

Description

Production process of flyer presser aluminum product
Technical Field
The invention relates to the technical field of processing of special textile accessories, in particular to a production process of a flyer presser finger aluminum product.
Background
The flyer presser aluminum part is a special textile part with a smooth and flat surface. In the preparation process of the flyer presser aluminum product, process defects often cause burrs on the surface of the flyer presser aluminum product to remain, and the remaining burrs in the spinning process can be hooked and entangled with silk threads, so that the normal running of the spinning operation is influenced. Therefore, cutting fluid needs to be introduced in the processing process of the flyer presser aluminum product, and in the processing processes of polishing, beating and the like of the flyer presser aluminum product by using tools, the cutting fluid can improve the lubricity between the cutter and the product and take away heat generated by processing, so that interface defects caused by heat accumulation are prevented, and the surface of the flyer presser aluminum product is flat and uniform.
Patent CN 106800963A discloses a water-soluble oil metal cutting fluid raw material and a metal cutting fluid, wherein alkyl ethanolamine with a carbon chain length of 4 is used for reacting with organic carboxylic acid in a system to generate amine soap, and the amine soap and oleyl alcohol polyoxyethylene ether containing polyoxyethylene chain segments with a polymerization degree of 3-8 are used together as a main emulsifier, so that base oil can obtain excellent emulsification balance in water; and the oleyl polyoxyethylene ether with the polymerization degree of 3-8 is selected to improve the long-term storage and high-temperature stability of the metal cutting fluid. Patent CN 106893622A provides an ether carboxylic acid compound agent of an aqueous cutting fluid, a preparation method and the aqueous cutting fluid, and the ether carboxylic acid compound agent is added into the aqueous cutting fluid, so that the problems of non-ideal foam and hard water resistance and high cost of the aqueous cutting fluid are solved. The lubricity of the cutting fluid is not optimized, and the technical problem of poor surface processing performance of a workpiece due to poor lubricity may occur in actual use.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problems solved by the present invention are: (1) the abrasion between the flyer presser finger aluminum product and a processing tool is reduced, and the surface quality of the flyer presser finger aluminum product is improved; (2) the dust and metal waste generated in the steps of polishing, punching and the like in the production process of the flyer presser aluminum product are reduced, and the noise generated in the processing process is reduced.
The cutting fluid can be combined with chips in the machining process of a metal workpiece, dust is prevented from being generated, heat generated by friction in the machining process can be rapidly transmitted, and the effects of lubrication and cooling are achieved. The inventor prepares and uses a noise reduction cutting fluid containing pentaerythritol stearate, polysaccharide phosphate and polyurethane emulsion in the production of a flyer presser aluminum part; pentaerythritol stearate contains polar groups, can adsorb and form stable lubricating film on the surface of an aluminum piece, and polysaccharide phosphate can react with the surface of the aluminum piece to form a film, so that the lubricity of the cutting fluid can be improved.
A production process of an aluminum part of a flyer presser comprises the following steps:
melting aluminum and casting an aluminum ingot to prepare a pressing palm, and polishing, dynamically balancing, spraying paint, drying and punching the pressing palm to prepare an aluminum assembly; the steel is machined into a steel assembly matched with the aluminum assembly, and the aluminum assembly and the steel assembly are assembled, subjected to ex-factory inspection, packaged and ex-factory to obtain the flyer presser aluminum part;
removing burrs by using vibration grinding after the casting and the paint spraying are finished; noise reduction cutting fluid is used in the polishing and punching procedures;
the noise reduction cutting fluid uses waterborne polyurethane with lubricating and noise reduction functions, wherein the waterborne polyurethane is a block polymer with molecular chain segments alternately composed of low glass transition segments and polar polyurethane segments, and L-tyrosine is used as a cross-linking point between the molecular chains.
Further preferably, the production process of the presser finger aluminum product comprises the following steps:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and noise reduction cutting fluid is used for reducing raised dust and noise in the processing process;
(3) spraying and painting the surface of the pressing palm, drying, then perforating, milling and filing to prepare an aluminum component, and reducing raised dust and noise by using noise reduction cutting fluid in the perforating treatment process;
(4) and (3) machining the steel into a steel assembly matched with the aluminum assembly, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum assembly and the steel assembly to obtain the flyer presser aluminum product.
Preferably, the operation parameters of the punching process are as follows: the pressing palm is put into a drill jig, a hole with phi 4.6mm is drilled to serve as an upper fulcrum and a lower fulcrum, the hole is reamed, and the roughness Ra of the hole is 12.5.
Preferably, the milling parameters are as follows: milling a lower fulcrum of 10-12 mm, milling an opening of 320mm, and milling an upper fulcrum of 8-10 mm; the roughness value Ra of the milling process was 6.3.
Preferably, the roughness value Ra of the rasped palm rod, the rasped palm yarn guide hole and the rasped palm leaf after sanding is 3.2.
Preferably, the weight of the presser finger aluminum product is 154.5-155.5 g.
The inventor notices that due to the existence of the long molecular chain in the molecule, the molecular chain of the polymer has certain mobility so as to play a role in lubrication, and can be applied to the preparation of cutting fluid; in addition, the polymer has certain absorption capacity on vibration energy, and can convert the vibration energy into heat energy and dissipate the heat energy, so that the polymer also has the potential of being applied as a noise reduction material. Since the cutting fluid has good thermal conductivity and the actual working temperature is lower than the glass transition temperature of the polymer, the polymer tends to show rigidity at the temperature, and the movement of the molecular chain of the polymer is limited at the moment, and the absorption capacity of the vibration energy is low, so that under the special working condition, the purpose of simultaneously keeping the lubricity and the noise reduction capacity of the polymer is very difficult.
In order to solve this technical problem, the inventors prepared an aqueous polyurethane whose molecular chain segment was composed of low glass transition segment and polar polyurethane segment alternately; as a block polymer, the waterborne polyurethane prepared by the invention has good low-temperature workability, and the glass transition of the waterborne polyurethane can occur in a wider temperature range. In the preparation process of the waterborne polyurethane, the inventor uses step-by-step polymerization, polyethylene glycol monobutyl ether provides an ether structure, 2-dimethylolpropionic acid and L-tyrosine provide a reactive group carboxyl, and polyol reacts with isocyanate to form the structure of the polyurethane. The L-tyrosine builds a three-dimensional structure of the waterborne polyurethane, and the L-tyrosine is polymerized with 2, 2-dimethylolpropionic acid to realize the extension of a molecular chain and is used as a cross-linking point between molecular chains to improve the uniformity of the waterborne polyurethane.
In the synthesis process, a hydrophobic fatty acid side chain is introduced into a molecular chain of the L-tyrosine, and hydrophobic interaction and hydrophobic association are generated on a main chain of the waterborne polyurethane, so that the hydrodynamic volume of the polymer is increased; as the hydrodynamic volume and the intrinsic viscosity are in positive correlation, the intrinsic viscosity is correspondingly increased, so that the waterborne polyurethane can keep better vibration energy/heat energy conversion capability at low temperature. L-tyrosine is taken as a cross-linking point between molecular chains to increase polar polyurethane segments, so that the entanglement degree of the molecular chain segments of the waterborne polyurethane is increased, the crystals formed by rigid chain segments are reduced, and the cohesive energy and hydrogen bonds of molecules are reduced; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of the molecular chain, and under the condition, the macromolecular chain segment can convert more vibration energy into heat energy through relaxation motion.
After the waterborne polyurethane prepared by the invention is applied to the cutting fluid, the waterborne polyurethane can absorb vibration energy of noise and convert the vibration energy into heat energy, the heat energy is taken away by the cutting fluid with good heat conductivity, and the technical purpose of reducing processing noise can be achieved through the energy conversion.
Preferably, the preparation method of the noise reduction cutting fluid is as follows:
s1, mixing microcrystalline cellulose, carbamide and organic solvent for pre-reaction; after the pre-reaction is finished, adding phosphoric acid and carrying out esterification reaction; cooling to normal temperature after the esterification reaction is finished, filtering to obtain a filter cake, washing with alcohol, and drying to obtain polysaccharide phosphate;
s2, dissolving 2, 2-dimethylolpropionic acid in an organic solvent to obtain a reaction base solution; adding polyethylene glycol monobutyl ether, 1, 4-butanediol, isophorone diisocyanate and a catalyst into the reaction base solution, and carrying out prepolymerization reaction; after the prepolymerization reaction is finished, adding L-tyrosine to carry out polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of a product to be neutral, removing an organic solvent through vacuum distillation to obtain waterborne polyurethane, and dispersing the waterborne polyurethane in water to obtain polyurethane emulsion;
s3 mixing pentaerythritol stearate, the polysaccharide phosphate, the polyurethane emulsion and water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
Further preferably, the preparation method of the noise reduction cutting fluid comprises the following steps of:
s1, mixing 1-2 parts of microcrystalline cellulose, 5-7.5 parts of carbamide and 50-75 parts of N, N-dimethylformamide for pre-reaction; after the pre-reaction is finished, adding 3.75-4.25 parts of phosphoric acid for esterification reaction; cooling to normal temperature after the esterification reaction is finished, filtering to obtain a filter cake, washing with alcohol for 3-5 times, and drying to obtain polysaccharide phosphate;
s2, dissolving 1.4-2.1 parts of 2, 2-dimethylolpropionic acid in 40-60 parts of acetone to obtain a reaction bottom liquid; continuously adding 3.1-6.2 parts of polyethylene glycol monobutyl ether, 0.9-1.2 parts of 1, 4-butanediol, 2.2-4.4 parts of isophorone diisocyanate and 0.005-0.01 part of dibutyltin dilaurate into the reaction base solution to perform prepolymerization reaction; after the prepolymerization reaction is finished, adding 3.6-4.8 parts of L-tyrosine to carry out polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of the product to be neutral by using N, N-docosylmethylamine, removing acetone by vacuum distillation to obtain waterborne polyurethane, and dispersing the waterborne polyurethane in 15-30 parts of water to obtain polyurethane emulsion;
s3, mixing 1-2.5 parts of pentaerythritol stearate, 3-4.5 parts of polysaccharide phosphate, 15-25 parts of polyurethane emulsion and 75-100 parts of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
Preferably, the pre-reaction in the step S1 has a reaction temperature of 90-105 ℃ and a reaction time of 0.5-2 h.
Preferably, the reaction temperature of the esterification reaction in the step S1 is 135-150 ℃, and the reaction time is 2-6 h.
Preferably, the reaction temperature of the prepolymerization in the step S2 is 75-90 ℃, and the reaction time is 1-3 h.
Preferably, the polymerization reaction in the step S2 has a reaction temperature of 35 to 50 ℃ and a reaction time of 0.5 to 2 hours.
Preferably, in the step S3, the ultrasonic power of the ultrasonic dispersion is 550-850W, the ultrasonic frequency is 28-40 kHz, and the processing time is 5-15 min.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The introduction and the function of part of raw materials in the formula of the invention are as follows:
microcrystalline cellulose: the main component is a straight-chain polysaccharide substance combined by beta-1, 4-glucoside bonds, and is white, odorless and tasteless crystal powder which is formed by superfine rod-shaped or powdery porous particles which are free to flow and are obtained by hydrolyzing natural cellulose to the limit polymerization degree through dilute acid; the invention is used as a raw material for synthesizing polysaccharide phosphate.
And (3) carbonamide: urea, an organic compound consisting of carbon, nitrogen, oxygen, and hydrogen, is a white crystal; the invention is used as a raw material for synthesizing polysaccharide phosphate.
2, 2-dimethylolpropionic acid: an organic compound of formula C5H10O4Can be applied to the aspects of chemical engineering of leather materials, liquid crystals, printing ink, food additives, adhesives and the like; the polyurethane is used as a chain extender of waterborne polyurethane.
1, 4-butanediol: organic matter with molecular formula of C4H10O2Colorless or yellowish oily liquid, which can be dissolved in methanol, ethanol, acetone, and slightly soluble in diethyl ether, can be used as solvent and moisturizer, and can also be used for preparing plasticizer, medicine, polyester resin, polyurethane resin, etc.; the polyurethane is used as a raw material for synthesizing waterborne polyurethane.
Isophorone diisocyanate: the alicyclic diisocyanate is widely applied to the industries of plastics, adhesives, medicines, spices and the like; the polyurethane is used as a raw material for synthesizing waterborne polyurethane.
Dibutyltin dilaurate: the organic tin additive can be dissolved in organic solvents such as benzene, toluene, carbon tetrachloride, ethyl acetate, chloroform, acetone, petroleum ether and the like and all industrial plasticizers, is insoluble in water, is light yellow or colorless oily liquid at normal temperature, and forms white crystals at low temperature; the polyurethane is used as a raw material for synthesizing waterborne polyurethane.
The invention has the beneficial effects that:
compared with the prior art, the production process can reduce the abrasion of the flyer presser finger aluminum product and a processing tool and improve the surface quality of the flyer presser finger aluminum product; and dust and metal waste generated in the steps of polishing, punching and the like in the production process of the flyer presser aluminum product are reduced, and noise generated in the processing process is reduced.
Compared with the prior art, in the noise reduction cutting fluid prepared by the invention, L-tyrosine is used as a cross-linking point between molecular chains, so that a polar polyurethane segment is increased, the entanglement degree of the molecular chain segment of the waterborne polyurethane is increased, crystals formed by a rigid chain segment are reduced, and the molecular cohesive energy and hydrogen bonds are reduced; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of the molecular chain, and under the condition, the macromolecular chain segment can convert more vibration energy into heat energy through relaxation motion.
Drawings
FIG. 1 is a flow chart of a manufacturing process of an aluminum part of a presser finger.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. Experimental procedures without specifying specific conditions in the following examples were selected in accordance with conventional procedures and conditions, or in accordance with commercial instructions.
Example 1
An ingot presser aluminum product is prepared by the following production process:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and the raised dust and noise are reduced by using cutting fluid in the processing process;
(3) the surface of the pressing palm is subjected to spraying, painting and drying, then punching is performed, then the pressing palm is milled and filed to prepare an aluminum component, and cutting fluid is used in the punching process to reduce raised dust and noise;
(4) and (3) machining the steel into a steel assembly matched with the aluminum assembly, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum assembly and the steel assembly to obtain the flyer presser aluminum product.
The operation parameters of the punching treatment are as follows: and putting the pressing palm into a drill jig, drilling a hole with phi 4.6mm serving as an upper fulcrum and a lower fulcrum, and spot facing, wherein the roughness Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower support point 12mm, milling an opening 320mm, and milling an upper support point 8mm in thickness; the roughness value Ra of the milling process was 6.3.
The roughness value Ra of the rasp processing middle presser finger rod, the presser finger yarn guide hole and the presser finger blade after sanding is 3.2.
The weight of the presser finger aluminum article was 155 g.
The preparation method of the cutting fluid comprises the following steps:
s1 pre-reaction is carried out after 1.5kg of microcrystalline cellulose, 6.5kg of carbamide and 50kg of N, N-dimethylformamide are mixed; after the pre-reaction is finished, 3.75kg of phosphoric acid is added for esterification reaction; cooling to normal temperature after the esterification reaction is finished, filtering to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain polysaccharide phosphate;
s2, mixing 2.5kg of pentaerythritol stearate, 3.5kg of polysaccharide phosphate and 75kg of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
The pre-reaction in the step S1 has the reaction temperature of 95 ℃ and the reaction time of 1 h.
The esterification reaction in the step S1 has the reaction temperature of 140 ℃ and the reaction time of 3 h.
In the step S2, the ultrasonic power of the ultrasonic dispersion is 550W, the ultrasonic frequency is 40kHz, and the processing time is 5 min.
Example 2
An ingot presser aluminum product is prepared by the following production process:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and noise reduction cutting fluid is used for reducing raised dust and noise in the processing process;
(3) spraying and painting the surface of the pressing palm, drying, then perforating, milling and filing to prepare an aluminum component, and reducing raised dust and noise by using noise reduction cutting fluid in the perforating treatment process;
(4) and (3) machining the steel into a steel component matched with the aluminum component, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum component and the steel component to obtain the flyer presser finger aluminum product.
The operation parameters of the punching treatment are as follows: and putting the pressing palm into a drill jig, drilling a hole with phi 4.6mm serving as an upper fulcrum and a lower fulcrum, and spot facing, wherein the roughness Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower support point 12mm, milling an opening 320mm, and milling an upper support point 8mm in thickness; the roughness value Ra of the milling process was 6.3.
The roughness value Ra of the rasp processing middle presser finger rod, the presser finger yarn guide hole and the presser finger blade after sanding is 3.2.
The weight of the presser finger aluminum article was 155 g.
The preparation method of the noise reduction cutting fluid comprises the following steps:
s1 dissolving 2.1kg of 2, 2-dimethylolpropionic acid in 50kg of acetone to obtain a reaction bottom solution; continuously adding 6.2kg of polyethylene glycol monobutyl ether, 1.2kg of 1, 4-butanediol, 4.4kg of isophorone diisocyanate and 0.01kg of dibutyltin dilaurate into the reaction base solution to perform prepolymerization reaction; after the prepolymerization reaction, 4.8kg of L-tyrosine is added for polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of the product to be neutral by using N, N-docosylmethylamine, removing acetone by vacuum distillation to obtain waterborne polyurethane, and dispersing the waterborne polyurethane in 25kg of water to obtain polyurethane emulsion;
s2, mixing 2.5kg of pentaerythritol stearate, 20kg of polyurethane emulsion and 75kg of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
The reaction temperature of the prepolymerization reaction in the step S1 is 80 ℃, and the reaction time is 2 h.
The polymerization reaction in step S1 was carried out at a reaction temperature of 40 ℃ for a reaction time of 1 hour.
In step S2, the ultrasonic power of the ultrasonic dispersion is 550W, the ultrasonic frequency is 40kHz, and the processing time is 5 min.
Example 3
An ingot wing presser aluminum product is prepared by the following production process:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and noise reduction cutting fluid is used in the processing process to reduce raised dust and noise;
(3) spraying and painting the surface of the pressing palm, drying, then perforating, milling and filing to prepare an aluminum component, and reducing raised dust and noise by using noise reduction cutting fluid in the perforating treatment process;
(4) and (3) machining the steel into a steel component matched with the aluminum component, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum component and the steel component to obtain the flyer presser finger aluminum product.
The operation parameters of the punching treatment are as follows: and putting the pressing palm into a drill jig, drilling a hole with phi 4.6mm serving as an upper fulcrum and a lower fulcrum, and spot facing, wherein the roughness Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower support point 12mm, milling an opening 320mm, and milling an upper support point 8mm in thickness; the roughness value Ra of the mill was 6.3.
The roughness value Ra of the palm pressing rod, the palm pressing yarn guide hole and the palm pressing blade after sanding in the filing processing is 3.2.
The weight of the presser finger aluminum article was 155 g.
The preparation method of the noise reduction cutting fluid comprises the following steps:
s1 pre-reaction is carried out after 1.5kg of microcrystalline cellulose, 6.5kg of carbamide and 50kg of N, N-dimethylformamide are mixed; after the pre-reaction is finished, 3.75kg of phosphoric acid is added for esterification reaction; cooling to normal temperature after the esterification reaction is finished, filtering to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain polysaccharide phosphate;
s2 dissolving 2.1kg of 2, 2-dimethylolpropionic acid in 50kg of acetone to obtain a reaction base solution; continuously adding 6.2kg of polyethylene glycol monobutyl ether, 1.2kg of 1, 4-butanediol, 4.4kg of isophorone diisocyanate and 0.01kg of dibutyltin dilaurate into the reaction base solution to perform prepolymerization reaction; after the prepolymerization reaction, 4.8kg of L-tyrosine is added for polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of the product to be neutral by using N, N-docosylmethylamine, removing acetone by vacuum distillation to obtain waterborne polyurethane, and dispersing the waterborne polyurethane in 25kg of water to obtain polyurethane emulsion;
s3 mixing 2.5kg of pentaerythritol stearate, 3.5kg of polysaccharide phosphate, 20kg of polyurethane emulsion and 75kg of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
The pre-reaction in the step S1 has the reaction temperature of 95 ℃ and the reaction time of 1 h.
The reaction temperature of the esterification reaction in the step S1 is 140 ℃, and the reaction time is 3 h.
In the step S2, the reaction temperature of the prepolymerization is 80 ℃, and the reaction time is 2 h.
The polymerization reaction in step S2 was carried out at a reaction temperature of 40 ℃ for 1 hour.
In the step S3, the ultrasonic power of the ultrasonic dispersion is 550W, the ultrasonic frequency is 40kHz, and the processing time is 5 min.
Comparative example 1
An ingot presser aluminum product is prepared by the following production process:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and the raised dust and noise are reduced by using cutting fluid in the processing process;
(3) the surface of the pressing palm is subjected to spraying, painting and drying, then punching is performed, then the pressing palm is milled and filed to prepare an aluminum component, and cutting fluid is used in the punching process to reduce raised dust and noise;
(4) and (3) machining the steel into a steel component matched with the aluminum component, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum component and the steel component to obtain the flyer presser finger aluminum product.
The operation parameters of the punching treatment are as follows: and putting the pressing palm into a drill jig, drilling a hole with phi 4.6mm serving as an upper fulcrum and a lower fulcrum, and spot facing, wherein the roughness Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower support point 12mm, milling an opening 320mm, and milling an upper support point 8mm in thickness; the roughness value Ra of the mill was 6.3.
The roughness value Ra of the rasp processing middle presser finger rod, the presser finger yarn guide hole and the presser finger blade after sanding is 3.2.
The weight of the presser finger aluminum article was 155 g.
The preparation method of the cutting fluid comprises the following steps:
mixing 2.5kg of pentaerythritol stearate with 75kg of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
The ultrasonic power of the ultrasonic dispersion is 550W, the ultrasonic frequency is 40kHz, and the processing time is 5 min.
Test example 1
The noise decibel of the processing step using the cutting fluid in the process is measured, and the noise test is carried out according to the specific requirements in GBJ 122-1988 Industrial Enterprise noise measurement Specification. The position of a measuring point is selected as the height of the ear position of a processing operator, the temperature of a testing environment is 25 ℃, and the relative humidity is 50%; the noise test uses an AWA6228+ type multifunctional sound level meter (provided by Qingdao Juanshan environmental protection group Co., Ltd.), and the sound level meter meets the standard requirement of GB/T3785.2-2010 part 2 type evaluation test of an electroacoustic sound level meter. The results of the noise test are shown in table 1.
TABLE 1
Polishing noise (dB) Punching noise (dB)
Example 1 71 66
Example 2 62 58
Example 3 56 53
Comparative example 1 73 69
It can be observed by testing the noise generated during the machining process that the decibel of the noise generated during the machining process is reduced after the noise reduction cutting fluid is used, wherein the best noise reduction effect is achieved in the embodiment 3. This phenomenon may be caused by the fact that in the noise reduction cutting fluid used in example 3, L-tyrosine increased the number of polar polyurethane segments as a cross-linking point between molecular chains, which increased the degree of entanglement of the molecular segments of the aqueous polyurethane and decreased the formation of crystals of the rigid segment, and consequently, the intramolecular cohesive energy and hydrogen bonding were decreased; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of the molecular chain, and under the condition, the macromolecular chain segment can convert more vibration energy into heat energy through relaxation motion.
Test example 2
The viscosity test of the cutting fluid prepared by the invention is carried out according to the specific requirements in GB/T22235-; the surface tension test of the cutting fluid is carried out according to the specific requirements in GB/T22237-2008 'determination of surface tension of surfactant'. The surface tension test used a ring method, the ring being made of platinum wire and having a thickness of 0.4mm and a circumference of 60mm, the ring being horizontally suspended from a wire frame on a metal rod connected to a tensiometer. The test environment temperature is 25 ℃ and the relative humidity is 50%. The results of the viscosity and surface tension tests of the cutting fluids are shown in table 2.
TABLE 2
Viscosity (mPa. s) Surface tension (mN/m)
Example 1 1.15 36
Example 2 1.07 34
Example 3 1.02 31
Comparative example 1 1.18 38
The permeability and heat dissipation of the cutting fluid are affected by viscosity and surface tension; therefore, viscosity and surface tension are important factors affecting the cooling and lubricating performance of the cutting fluid. As can be seen from the test results in Table 2, example 3 has the lowest viscosity and surface tension, and the liquid with low surface tension has a small contact angle on the solid surface and is easy to diffuse and permeate into the contact gap between the cutter and the workpiece; example 3 had a viscosity of 1.02 mPas, good fluidity and good lubricating and cooling effects.

Claims (10)

1. A production process of an aluminum part of a flyer presser is characterized by comprising the following steps:
melting aluminum and casting an aluminum ingot to prepare a pressing palm, and polishing, dynamically balancing, spraying paint, drying and punching the pressing palm to prepare an aluminum assembly; the steel is processed into a steel component matched with the aluminum component, and the aluminum component and the steel component are assembled, subjected to delivery inspection, product packaging and delivered to obtain the flyer presser finger aluminum product;
removing burrs by using vibration grinding after the casting and the paint spraying are finished; noise reduction cutting fluid is used in the polishing and punching procedures;
the noise reduction cutting fluid uses waterborne polyurethane with lubricating and noise reduction functions, wherein the waterborne polyurethane is a block polymer with molecular chain segments alternately composed of low glass transition segments and polar polyurethane segments, and L-tyrosine is used as a cross-linking point between the molecular chains.
2. A process for the production of a presser finger aluminium article according to claim 1, comprising the steps of:
(1) melting aluminum and casting an aluminum ingot to prepare a pressing palm, and removing flash burrs on the pressing palm by using vibration grinding;
(2) polishing and dynamic balance processing are carried out on the pressing palm, and noise reduction cutting fluid is used for reducing raised dust and noise in the processing process;
(3) the surface of the pressing palm is subjected to spraying, painting and drying, then punching is performed, then the pressing palm is milled and filed to prepare an aluminum component, and noise reduction cutting fluid is used in the punching process to reduce raised dust and noise;
(4) and (3) machining the steel into a steel component matched with the aluminum component, and assembling, ex-factory inspection, product packaging and ex-factory of the aluminum component and the steel component to obtain the flyer presser finger aluminum product.
3. A process for the production of presser finger aluminium articles according to claim 2, wherein the perforation process operating parameters are: and putting the pressing palm into a drill jig, drilling a hole with phi 4.6mm serving as an upper fulcrum and a lower fulcrum, and spot facing, wherein the roughness Ra of the hole is 12.5.
4. A process for the production of a presser finger aluminium article according to claim 2, wherein the milling parameters are as follows: milling a lower fulcrum of 10-12 mm, milling an open file of 320mm, and milling an upper fulcrum of 8-10 mm in thickness; the roughness value Ra of the milling process was 6.3.
5. A process for the production of a presser finger aluminium article according to claim 2, wherein: the roughness value Ra of the rasp processing middle presser finger rod, the presser finger yarn guide hole and the presser finger blade after sanding is 3.2.
6. The process for producing a presser finger aluminum article according to claim 2, wherein the noise reduction cutting fluid is prepared by the following method in parts by weight:
s1 mixing 1-2 parts of microcrystalline cellulose, 5-7.5 parts of carbamide and 50-75 parts of N, N-dimethylformamide for pre-reaction; after the pre-reaction is finished, adding 3.75-4.25 parts of phosphoric acid for esterification reaction; cooling to normal temperature after the esterification reaction is finished, filtering to obtain a filter cake, washing with alcohol for 3-5 times, and drying to obtain polysaccharide phosphate;
s2, dissolving 1.4-2.1 parts of 2, 2-dimethylolpropionic acid in 40-60 parts of acetone to obtain a reaction bottom liquid; continuously adding 3.1-6.2 parts of polyethylene glycol monobutyl ether, 0.9-1.2 parts of 1, 4-butanediol, 2.2-4.4 parts of isophorone diisocyanate and 0.005-0.01 part of dibutyltin dilaurate into the reaction base solution to perform prepolymerization reaction; after the prepolymerization reaction is finished, adding 3.6-4.8 parts of L-tyrosine to carry out polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of the product to be neutral by using N, N-docosylmethylamine, removing acetone by vacuum distillation to obtain waterborne polyurethane, and dispersing the waterborne polyurethane in 15-30 parts of water to obtain polyurethane emulsion;
s3, mixing 1-2.5 parts of pentaerythritol stearate, 3-4.5 parts of polysaccharide phosphate, 15-25 parts of polyurethane emulsion and 75-100 parts of water, and performing ultrasonic dispersion to obtain the noise reduction cutting fluid.
7. A process for the production of a presser finger aluminium article according to claim 6, wherein: in the step S1, the pre-reaction temperature is 90-105 ℃, and the reaction time is 0.5-2 h.
8. A process for the production of a presser finger aluminium article according to claim 6, wherein: the esterification reaction in the step S1 is carried out at the reaction temperature of 135-150 ℃ for 2-6 h.
9. A process for the production of a presser finger aluminium article according to claim 6, wherein: the reaction temperature of the prepolymerization reaction in the step S2 is 75-90 ℃, and the reaction time is 1-3 h.
10. A process for the production of a presser finger aluminium article according to claim 6, wherein: the polymerization reaction in the step S2 has a reaction temperature of 35-50 ℃ and a reaction time of 0.5-2 h.
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CN110003639A (en) * 2019-03-27 2019-07-12 宁波燕翔教育投资管理有限公司 A kind of preparation method of Underwater Acoustic Absorption polymer composites
CN110129121A (en) * 2019-05-31 2019-08-16 黄智翔 Antirust corrosion-proof cutting fluid and preparation method thereof
CN111632802A (en) * 2020-05-28 2020-09-08 无锡中氏机械有限公司 Spinning presser surface spraying process
CN112430308A (en) * 2020-11-24 2021-03-02 中南大学 Preparation method of bio-based high-performance waterborne polyurethane resin and product thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107082869A (en) * 2017-05-23 2017-08-22 孝感市江雁化工有限公司 A kind of preparation method of phosphatization extreme-pressure anti-wear aqueous cutting fluid
CN107164052A (en) * 2017-05-23 2017-09-15 孝感市江雁化工有限公司 A kind of preparation method of the aqueous micro-emulsion cutting fluid of organic amine
CN108865395A (en) * 2018-09-14 2018-11-23 江苏宝机数控科技有限公司 A kind of microemulsified rust preventive cutting fluid and preparation method thereof
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