CN114682998B - Production process of presser finger aluminum product - Google Patents

Production process of presser finger aluminum product Download PDF

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Publication number
CN114682998B
CN114682998B CN202210271097.4A CN202210271097A CN114682998B CN 114682998 B CN114682998 B CN 114682998B CN 202210271097 A CN202210271097 A CN 202210271097A CN 114682998 B CN114682998 B CN 114682998B
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aluminum
reaction
parts
cutting fluid
noise
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CN114682998A (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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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02—Water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/045—Polyureas; Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/76—Reduction of noise, shudder, or vibrations
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/244—Metal working of specific metals
    • C10N2040/245—Soft 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 product of a presser finger of an ingot, wherein in the production process, an aluminum ingot is manufactured into a presser finger through aluminum melting and casting, and the presser finger is manufactured into an aluminum component through polishing, dynamic balancing, paint spraying, drying and punching; and (3) the steel is manufactured into a steel component matched with an aluminum component through metal processing, and the aluminum component and the steel component are assembled, tested in a factory, packaged in a product, and shipped to obtain the presser finger aluminum product. The noise-reducing cutting fluid is used in the polishing and punching processes, the waterborne polyurethane in the noise-reducing cutting fluid 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 conduction capability, and the technical purpose of reducing processing noise can be achieved through the energy conversion.

Description

Production process of presser finger aluminum product
Technical Field
The invention relates to the technical field of processing of special textile accessories, in particular to a production process of an aluminum product of a presser finger.
Background
The aluminum piece of the presser finger is a special piece for spinning and has a smooth and flat surface. In the preparation process of the aluminum parts of the presser finger, the process defects often cause the burrs on the surfaces of the aluminum parts of the presser finger to remain, and the remaining burrs can hook and entangle threads in the spinning process, so that the normal operation of the spinning operation is affected. Therefore, cutting fluid is required to be introduced in the processing process of the aluminum piece of the presser finger, and in the processing processes of polishing, working and the like of the aluminum piece of the presser finger by using a tool, the cutting fluid can promote the lubricity between a cutter and the piece and take away heat generated by processing, so that interface defects caused by heat aggregation are prevented, and the surface of the aluminum piece of the presser finger is smooth and uniform.
Patent CN 106800963A discloses a water-soluble oil metal cutting fluid raw material and metal cutting fluid, which uses alkyl ethanolamine with carbon chain length of 4, and generates amine soap by reacting with organic carboxylic acid in the system, and uses the amine soap and oleyl alcohol polyoxyethylene ether with polyoxyethylene chain segment polymerization degree of 3-8 as main emulsifying agent, so that the base oil can obtain excellent emulsification balance in water; and the oleyl alcohol 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 aqueous cutting fluid, a preparation method and the aqueous cutting fluid, and solves the problems of unsatisfactory foam and hard water resistance of the aqueous cutting fluid and high cost by adding the ether carboxylic acid compound agent into the aqueous cutting fluid. The lubricity of the cutting fluid is not optimized, and the technical problem of poor processing performance of the surface of the workpiece due to poor lubricity may occur in actual use.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: (1) The abrasion of the aluminum piece of the presser finger and the processing tool is reduced, and the surface quality of the aluminum piece of the presser finger is improved; (2) Dust and metal waste generated in polishing, punching and other steps in the production process of the aluminum piece of the presser finger are reduced, and noise generated in the processing process is reduced.
The cutting fluid can be combined with scraps in the processing process of the metal workpiece, so that dust emission is prevented, heat generated by friction in the processing process can be rapidly transferred, and the effects of lubrication and cooling are achieved. The inventor prepares and uses noise reduction cutting fluid containing pentaerythritol stearate, polysaccharide phosphate and polyurethane emulsion in the production of aluminum parts of the presser finger; pentaerythritol stearate contains polar groups, can be adsorbed on the surface of an aluminum part to form a stable lubricating film, and polysaccharide phosphate can react with the surface of the aluminum part to form a film, so that the lubricating property of the cutting fluid can be improved.
A process for producing an aluminum presser finger product comprising the steps of:
aluminum ingot is melted and cast to prepare a pressing palm, and the pressing palm is polished, dynamically balanced, sprayed with paint, dried and punched to prepare an aluminum assembly; the steel is manufactured into a steel component matched with an aluminum component through metal processing, and the aluminum component and the steel component are assembled, tested in a delivery way, packaged in a product way and delivered from the delivery way to obtain the presser finger aluminum product;
removing burrs by using vibration grinding after casting and paint spraying are completed; noise reduction cutting fluid is used in the polishing and punching processes;
the noise reduction cutting fluid uses water-based polyurethane with lubrication and noise reduction functions, wherein the water-based 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 crosslinking point between molecular chains.
Further preferred is a process for the production of an aluminum presser finger product comprising the steps of:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing the pressing palm, wherein noise-reducing cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and noise-reducing cutting fluid is used in the punching treatment process to reduce dust and noise;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
Preferably, the operation parameters of the punching process are as follows: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
Preferably, the milling parameters are as follows: milling a lower supporting point by 10-12 mm, milling a starting gear by 320mm, and milling an upper supporting point by 8-10 mm; the roughness Ra of the milling was 6.3.
Preferably, in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
Preferably, the weight of the presser finger aluminum article is 154.5 to 155.5g.
The inventor notes that the molecular chain of the polymer has certain activity capacity to play a role of lubrication due to the existence of the long molecular chain in the molecule, and can be applied to the preparation of cutting fluid; in addition, the polymer has a certain absorption capacity to vibration energy, can convert the vibration energy into heat energy and dissipate the heat energy, and has potential to be applied as noise reduction materials. Since the cutting fluid has good thermal conductivity and its actual working temperature is lower than the glass transition temperature of the polymer, the polymer tends to exhibit rigidity at that temperature, and the polymer molecular chain is limited in its activity and has a low ability to absorb vibration energy, so that it is very difficult to simultaneously maintain the lubricity and noise reduction ability of the polymer under such special working conditions.
In order to solve the technical problem, the inventor prepares waterborne polyurethane, wherein a molecular chain segment of the waterborne polyurethane consists of low glass transition segments and polar polyurethane segments alternately; as a block polymer, the aqueous polyurethane prepared by the invention has good low-temperature workability, and the glass transition of the aqueous polyurethane can occur in a wider temperature range. In the preparation process of the aqueous polyurethane, the inventor uses gradual polymerization, provides an ether structure by polyethylene glycol monobutyl ether, provides a carboxyl group of a reaction group by 2, 2-dimethylolpropionic acid and L-tyrosine, and utilizes the reaction of polyalcohol and isocyanate to form the polyurethane structure. The L-tyrosine constructs a three-dimensional structure of the waterborne polyurethane, and the L-tyrosine is polymerized with 2, 2-dimethylolpropionic acid to realize the expansion of molecular chains and serve as crosslinking points among the molecular chains to improve the uniformity of the waterborne polyurethane.
In the synthesis process, the L-tyrosine introduces a hydrophobic fatty acid side chain into a molecular chain, and generates hydrophobic interaction and hydrophobic association on a main chain of the waterborne polyurethane, so that the hydrodynamic volume of the polymer is increased; because the hydrodynamic volume and the intrinsic viscosity are positively correlated, the intrinsic viscosity is correspondingly increased, so that the water-based polyurethane can retain better vibration energy/heat energy conversion capability at low temperature. L-tyrosine is used as a crosslinking point between molecular chains to increase polar polyurethane segments, so that the entanglement degree of the molecular segments of the waterborne polyurethane is increased, and the crystallization formed by the rigid segments is reduced, so that the molecular cohesive energy and hydrogen bonds are reduced; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of molecular chains, and under the condition, the macromolecular chain segments can convert more vibration energy into heat energy through relaxation movement.
After the waterborne polyurethane prepared by the invention is applied to 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 conduction capability, 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 comprises the following steps:
s1, mixing microcrystalline cellulose, carbonamide and an organic solvent, and then carrying out a 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 to perform a prepolymerization reaction; adding L-tyrosine after the prepolymerization reaction is finished to carry out polymerization reaction; after the polymerization reaction is finished, regulating the pH value of a product to be neutral, removing an organic solvent by 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 carbonamide and 50-75 parts of N, N-dimethylformamide for pre-reaction; after the pre-reaction is finished, adding 3.75 to 4.25 parts of phosphoric acid to perform 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, 1.4 to 2.1 parts of 2, 2-dimethylolpropionic acid is dissolved in 40 to 60 parts of acetone to obtain reaction base solution; 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 for pre-polymerization reaction; adding 3.6-4.8 parts of L-tyrosine after the prepolymerization reaction is finished to carry out polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of a product to be neutral by using N, N-twenty-dialkyl methyl amine, removing acetone by vacuum distillation to obtain aqueous polyurethane, and dispersing the aqueous 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 reaction temperature of the pre-reaction in the step S1 is 90-105 ℃ and the reaction time is 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 reaction in the step S2 is 75-90 ℃ and the reaction time is 1-3 h.
Preferably, the reaction temperature of the polymerization reaction in the step S2 is 35-50 ℃ and the reaction time is 0.5-2 h.
Preferably, the ultrasonic power of the ultrasonic dispersion in the step S3 is 550-850W, the ultrasonic frequency is 28-40 kHz, and the treatment time is 5-15 min.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the invention.
The invention has the following description and functions of partial raw materials in the formula:
microcrystalline cellulose: the main component is linear polysaccharide substance combined by beta-1, 4-glucosidic bond, which is white, odorless and tasteless crystalline powder composed of natural cellulose which is hydrolyzed by dilute acid to extremely fine short rod-like or powdery porous particles with limited polymerization degree and free flow; the invention is used as a raw material for synthesizing polysaccharide phosphate.
And (3) carbonamide: urea, an organic compound consisting of carbon, nitrogen, oxygen, hydrogen, is a white crystal; the invention is used as a raw material for synthesizing polysaccharide phosphate.
2, 2-dimethylolpropionic acid: an organic compound with molecular formula of C 5 H 10 O 4 Can be applied to the aspects of leather materials, liquid crystals, printing ink, food additives, adhesive chemical industry and the like; the polyurethane is used as a chain extender of waterborne polyurethane.
1, 4-butanediol: organic matter with molecular formula of C 4 H 10 O 2 Colorless or pale yellow oily liquid which can be dissolved in methanol, ethanol and acetone, is slightly dissolved in diethyl ether and is used as solvent and moisturizing agent, and can be used for preparing plasticizer, medicine, polyester resin, polyurethane resin, etc.; the polyurethane is used as a raw material for synthesizing the water-based polyurethane.
Isophorone diisocyanate: alicyclic diisocyanate is widely applied in the industries of plastics, adhesives, medicines, fragrances and the like; the polyurethane is used as a raw material for synthesizing the water-based polyurethane.
Dibutyl tin dilaurate: the organic tin additive can be dissolved in benzene, toluene, carbon tetrachloride, ethyl acetate, chloroform, acetone, petroleum ether and other organic solvents and all industrial plasticizers, is insoluble in water, is light yellow or colorless oily liquid at normal temperature, and is white crystal at low temperature; the polyurethane is used as a raw material for synthesizing the water-based polyurethane.
The invention has the beneficial effects that:
compared with the prior art, the method can reduce the abrasion of the aluminum piece of the presser finger and the processing tool in the production process, and improve the surface quality of the aluminum piece of the presser finger; dust and metal waste generated in polishing, punching and other steps in the production process of the aluminum piece of the presser finger 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 crosslinking point between molecular chains to increase polar polyurethane segments, so that the entanglement degree of the molecular segments of the waterborne polyurethane is increased, and the crystallization formed by the rigid segments is reduced, so that the cohesive energy and hydrogen bonds of the molecules are reduced; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of molecular chains, and under the condition, the macromolecular chain segments can convert more vibration energy into heat energy through relaxation movement.
Drawings
Figure 1 is a flow chart of the production process of an aluminum presser finger product.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
Example 1
The aluminum piece for the presser finger is prepared by the following production process:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing are carried out on the pressing palm, and cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and cutting fluid is used for reducing dust and noise in the punching treatment process;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
The operation parameters of the punching process are as follows: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower supporting point by 12mm, milling a starting gear by 320mm, and milling an upper supporting point by 8mm; the roughness Ra of the milling was 6.3.
And in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
The weight of the presser finger aluminum article was 155g.
The preparation method of the cutting fluid comprises the following steps:
s1, mixing 1.5kg of microcrystalline cellulose, 6.5kg of carbonamide and 50kg of N, N-dimethylformamide for pre-reaction; after the pre-reaction is finished, adding 3.75kg of phosphoric acid to perform 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 reaction temperature of the pre-reaction in the step S1 is 95 ℃ and the reaction time is 1h.
The reaction temperature of the esterification reaction in the step S1 is 140 ℃, and the reaction time is 3 hours.
The ultrasonic power of the ultrasonic dispersion in the step S2 is 550W, the ultrasonic frequency is 40kHz, and the treatment time is 5min.
Example 2
The aluminum piece for the presser finger is prepared by the following production process:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing the pressing palm, wherein noise-reducing cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and noise-reducing cutting fluid is used in the punching treatment process to reduce dust and noise;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
The operation parameters of the punching process are as follows: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower supporting point by 12mm, milling a starting gear by 320mm, and milling an upper supporting point by 8mm; the roughness Ra of the milling was 6.3.
And in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
The weight of the presser finger aluminum article was 155g.
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 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; 4.8kg of L-tyrosine was added after the end of the prepolymerization to carry out polymerization; after the polymerization reaction is finished, adjusting the pH value of a product to be neutral by using N, N-twenty-dialkyl methyl amine, removing acetone by vacuum distillation to obtain aqueous polyurethane, and dispersing the aqueous 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 2h.
The reaction temperature of the polymerization reaction in the step S1 is 40 ℃ and the reaction time is 1h.
The ultrasonic power of the ultrasonic dispersion in the step S2 is 550W, the ultrasonic frequency is 40kHz, and the treatment time is 5min.
Example 3
The aluminum piece for the presser finger is prepared by the following production process:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing the pressing palm, wherein noise-reducing cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and noise-reducing cutting fluid is used in the punching treatment process to reduce dust and noise;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
The operation parameters of the punching process are as follows: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower supporting point by 12mm, milling a starting gear by 320mm, and milling an upper supporting point by 8mm; the roughness Ra of the milling was 6.3.
And in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
The weight of the presser finger aluminum article was 155g.
The preparation method of the noise reduction cutting fluid comprises the following steps:
s1, mixing 1.5kg of microcrystalline cellulose, 6.5kg of carbonamide and 50kg of N, N-dimethylformamide for pre-reaction; after the pre-reaction is finished, adding 3.75kg of phosphoric acid to perform 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, 2.1kg of 2, 2-dimethylolpropionic acid is dissolved 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; 4.8kg of L-tyrosine was added after the end of the prepolymerization to carry out polymerization; after the polymerization reaction is finished, adjusting the pH value of a product to be neutral by using N, N-twenty-dialkyl methyl amine, removing acetone by vacuum distillation to obtain aqueous polyurethane, and dispersing the aqueous 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 reaction temperature of the pre-reaction in the step S1 is 95 ℃ and the reaction time is 1h.
The reaction temperature of the esterification reaction in the step S1 is 140 ℃, and the reaction time is 3 hours.
The reaction temperature of the prepolymerization reaction in the step S2 is 80 ℃ and the reaction time is 2h.
The reaction temperature of the polymerization reaction in the step S2 is 40 ℃ and the reaction time is 1h.
The ultrasonic power of the ultrasonic dispersion in the step S3 is 550W, the ultrasonic frequency is 40kHz, and the treatment time is 5min.
Comparative example 1
The aluminum piece for the presser finger is prepared by the following production process:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing are carried out on the pressing palm, and cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and cutting fluid is used for reducing dust and noise in the punching treatment process;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
The operation parameters of the punching process are as follows: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
The milling parameters are as follows: milling a lower supporting point by 12mm, milling a starting gear by 320mm, and milling an upper supporting point by 8mm; the roughness Ra of the milling was 6.3.
And in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
The weight of the presser finger aluminum article was 155g.
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 treatment time is 5min.
Test example 1
The noise decibels of the processing steps using the cutting fluid in the process are measured, and the noise test is carried out with reference to the specific requirements in GBJ 122-1988 noise measurement Specification of industrial enterprises. The position of the measuring point is selected as the ear position height of a processing operator, the testing environment is at the temperature of 25 ℃, and the relative humidity is 50%; the noise test uses an AWA6228+ type multifunctional sound level meter (provided by Qingdao Jichuang environmental protection group Co., ltd.) which accords with the requirements of GB/T3785.2-2010 electric Acoustic sound level meter part 2 type evaluation test standard. 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 noise decibels generated during the machining process after the noise reduction cutting fluid was used were reduced, wherein example 3 had the best noise reduction effect. The reason for this phenomenon may be that in the noise reduction cutting fluid used in example 3, L-tyrosine as a cross-linking point between molecular chains increases the polar polyurethane segments, resulting in an increase in entanglement degree of the molecular segments of the aqueous polyurethane and a decrease in crystallization of the rigid segments, so that molecular cohesive energy and hydrogen bonds are reduced; the reduction of hydrogen bonds is beneficial to reducing the restriction on the movement of molecular chains, and under the condition, the macromolecular chain segments can convert more vibration energy into heat energy through relaxation movement.
Test example 2
The viscosity test of the cutting fluid prepared by the invention is carried out according to the specific requirements in GB/T22235-2008 liquid viscosity determination; the surface tension test of the cutting fluid is carried out with reference to the specific requirements in GB/T22237-2008 "determination of surface tension of surfactant". The surface tension test used a loop made of platinum wire with a thickness of 0.4mm and a circumference of 60mm, the loop being suspended horizontally on a wire frame on a metal rod connected to a tensiometer. The test environment temperature was 25℃and the relative humidity was 50%. The viscosity and surface tension test results of the cutting fluid are shown in Table 2.
TABLE 2
Viscosity (mPa. S) Surface tension (mN/m)
Examples1 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; thus, viscosity and surface tension are important factors affecting cooling and lubricating properties 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 contact angle of the liquid with low surface tension on the solid surface is small, so that the liquid is easy to diffuse and permeate into the contact gap between the cutter and the workpiece; the viscosity of example 3 was 1.02 mPas, and the product had good fluidity and was able to perform good lubrication and cooling functions.

Claims (5)

1. A process for producing an aluminum presser finger product comprising the steps of:
aluminum ingot is melted and cast to prepare a pressing palm, and the pressing palm is polished, dynamically balanced, sprayed with paint, dried and punched to prepare an aluminum assembly; the steel is manufactured into a steel component matched with an aluminum component through metal processing, and the aluminum component and the steel component are assembled, tested in a delivery way, packaged in a product way and delivered from the delivery way to obtain the presser finger aluminum product;
removing burrs by using vibration grinding after casting and paint spraying are completed; noise reduction cutting fluid is used in the polishing and punching processes;
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 carbonamide 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 to perform 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, 1.4-2.1 parts of 2, 2-dimethylolpropionic acid is dissolved in 40-60 parts of acetone to obtain a reaction base solution; 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 for a prepolymerization reaction; adding 3.6-4.8 parts of L-tyrosine after the prepolymerization reaction is finished to carry out polymerization reaction; after the polymerization reaction is finished, adjusting the pH value of a product to be neutral by using N, N-twenty-dialkyl methyl amine, removing acetone by vacuum distillation to obtain aqueous polyurethane, and dispersing the aqueous 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;
the reaction temperature of the pre-reaction in the step S1 is 90-105 ℃ and the reaction time is 0.5-2 h; the reaction temperature of the esterification reaction in the step S1 is 135-150 ℃ and the reaction time is 2-6 h;
the reaction temperature of the prepolymerization reaction in the step S2 is 75-90 ℃ and the reaction time is 1-3 h; and (2) the reaction temperature of the polymerization reaction in the step (S2) is 35-50 ℃ and the reaction time is 0.5-2 h.
2. A process for producing an aluminum presser finger product as claimed in claim 1, comprising the steps of:
(1) Aluminum ingot is melted and cast to form a pressing palm, and flash burrs on the pressing palm are removed by using vibration grinding;
(2) Polishing and dynamic balancing the pressing palm, wherein noise-reducing cutting fluid is used for reducing dust and noise in the treatment process;
(3) The surface of the pressing palm is sprayed, painted and dried, then punched, milled and filed to prepare an aluminum assembly, and noise-reducing cutting fluid is used in the punching treatment process to reduce dust and noise;
(4) And (3) manufacturing steel into a steel component matched with an aluminum component through metal processing, and assembling, factory inspection, product packaging and factory leaving the aluminum component and the steel component to obtain the presser finger aluminum product.
3. A process for producing an aluminum presser finger product as claimed in claim 2, wherein the operating parameters of the punching process are: and placing the pressing palm into a drilling jig to drill a hole with the diameter of 4.6mm as an upper supporting point and a lower supporting point, and spot-facing, wherein the roughness value Ra of the hole is 12.5.
4. A process for producing an aluminum presser finger product as claimed in claim 2, characterized in that the milling parameters are as follows: milling a lower supporting point by 10-12 mm, milling a starting gear by 320mm, and milling an upper supporting point by 8-10 mm; the roughness Ra of the milling was 6.3.
5. A process for the production of an aluminum presser finger article as claimed in claim 2, wherein: and in the file processing, the roughness value Ra of the sole pressing rod, the sole pressing yarn guide hole and the sole pressing leaves after sanding is 3.2.
CN202210271097.4A 2022-03-18 2022-03-18 Production process of presser finger aluminum product Active CN114682998B (en)

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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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