Development status and prospects of special processing technology

Abstract Abstract: Special processing technology is called the technology of the 21st century in the world, and plays a decisive role in the development and production of new weapons and equipment. This article from laser processing technology, electron beam processing technology, ion beam and plasma processing technology, electrical processing technology...

Abstract: Special processing technology is called the technology of the 21st century in the world, and plays a decisive role in the development and production of new weapons and equipment. This paper introduces the development status of foreign countries from laser processing technology, electron beam processing technology, ion beam and plasma processing technology, and electrical processing technology, and proposes the technical development direction of corresponding fields in China.
Keywords: special processing; high energy beam; laser technology; development trend, special processing, also known as "non-traditional processing" or "modern processing method", generally refers to the use of electrical energy, thermal energy, light energy, electrochemical energy, chemical energy, sound Energy and special mechanical energy and other energy to achieve the processing method to remove or increase the material. The special processing technologies described in this paper mainly refer to laser processing technology, electron beam processing technology, ion beam and plasma processing technology and electrical processing technology.
With the development of new types of weapons and equipment, the demand for special processing technology at home and abroad is increasingly urgent. Regardless of aircraft, missiles, or other combat platforms, it is required to reduce structural weight, increase flight speed, increase range, reduce fuel consumption, achieve high combat performance, long structural life, and good economic endurance. To this end, the above-mentioned weapon systems and combat platforms require new structures such as monolithic structures, lightweight structures, advanced cooling structures, and new materials such as titanium alloys, composite materials, powder materials, and intermetallic compounds.
To this end, special processing technology is needed to solve the processing problems that cannot be realized by conventional processing methods in the manufacture of weapons and equipment. Therefore, the main application fields of special processing technology are:
Difficult to process materials, such as titanium alloy, heat-resistant stainless steel, high-strength steel, composite materials, engineering ceramics, diamond, ruby, hardened glass and other high hardness, high toughness, high strength, high melting point materials.
Difficult to machine parts, such as three-dimensional cavity, hole, group hole and narrow seam of complex parts.
Processing of low-stiffness parts such as thin-walled parts, elastic components, etc.
Welding, cutting, hole making, spray coating, surface modification, etching and fine processing are carried out with high energy density beam.
1 Laser processing technology Foreign laser processing equipment and processes are developing rapidly. Now it has 100kW high-power CO2 laser, kW-class high beam quality Nd:YAG solid-state laser, and some can be equipped with optical fiber for multi-station and long-distance work. . Laser processing equipment has high power and high degree of automation. CNC control and multi-coordinate linkage have been widely used, and auxiliary systems such as laser power monitoring, auto focus, and industrial TV display are installed.
The minimum aperture of the laser hole has reached 0.002mm. The automatic six-axis laser hole-making equipment has been successfully applied to process the aero-engine turbine blades and the combustion chamber film holes, achieving the effect of no recast layer and no microcrack.
Laser cutting is suitable for parts made of heat resistant alloys, titanium alloys, composite materials. At present, the cutting speed of thin materials can reach 15m/min, the slit is narrow, generally between 0.1 and 1mm, the heat affected zone is only 10%-20% of the slit width, and the maximum cutting thickness can reach 45mm. It has been widely used in aircraft three-dimensional. Skins, frames, ship hull shelves, helicopter rotors, engine combustion chambers, etc.
Laser welded sheets are quite common and are mostly used in the automotive, aerospace and instrumentation industries. Laser micro-welding technology has become an important means of micro-connection of micro-package junctions in avionics and high-precision mechanical equipment.

Calcium Sulfate : the commonly used calcined gypsum is the best coagulant for tofu production. In addition, calcium sulfate can also be used as thickening agent, acidity regulator and Flour Treatment Agent.

Calcium Chloride: generally not used as tofu coagulant, can be used as low methoxy pectin and sodium alginate coagulant. It can also be used for making cheese, and can also be used as hardener for assorted vegetables, tomatoes and lettuce.

Magnesium Chloride: Salt brine is commonly used to make old tofu and dried tofu. Salt brine tofu has a unique flavor of tofu.

Propylene glycol: It can be used as a moisturizer and softener for bread, candy, packaged meat, cheese, etc. It can increase the elasticity of noodles, increase the flavor, whiteness and luster of tofu, and it can also be used as food antifreeze liquid.

EDTA salts: including disodium ethylenediaminetetraacetate and disodium calcium ethylenediaminetetraacetate. EDTA salts have the function of chelating metal ions, eliminating harmful effects caused by metal ions, preventing discoloration, deterioration, turbidity caused by metal, preventing loss of vitamin C due to oxidation, improving food quality, and are calcium nutrients. Fortifier.

Tin disodium Citrate : also known as 8301 color protection agent, is white crystalline, very soluble in water, easy to absorb moisture and hydrolyze, very easy to oxidize, mainly used in fruits and vegetables, edible fungi canned, antioxidant color protection role.

Gluconic acid-delta-lactone: Gluconic acid-delta-lactone can be used as a coagulant to make lactone tofu, as a preservative to preserve fish, poultry, shrimp, etc., as a sour agent to be used in juice drinks and jelly. As a chelating agent, it can be used in grape juice or other berry wine, dairy products and beer to prevent the production of tartar, milk stone and beer stone.

Herb extract: it is obtained by crushing, boiling, extracting, filtering, concentrating, and spray drying with dried herbs. It is light yellow solid powder. It is a gelatinous polysaccharide contained in the grass and can be used to make cake foods.

Microbialtransglutaminase is an enzyme that catalyzes the intra (or intra) acyl transfer reaction between proteins, resulting in covalent cross-linking between proteins (or polypeptides), and can catalyze the intra-molecular and inter-molecular covalent cross-linking of protein polypeptides, thereby improving the structure and function of proteins. It has significant effect on protein properties such as foaming, emulsifying, emulsifying stability, thermal stability, water retention and gel ability, and then improves the flavor, taste, texture and appearance of food. It can be applied to aquatic products, ham, sausages, noodles, tofu and so on.

In addition to the above substances, they also include phosphoric acid, sodium lactate, calcium lactate, calcium Carbonate in acidity regulators, alum in bulking agents, polyglycerol monofatty acid esters in emulsifiers, tween, stearic lactate, chymosin in enzymes, D-mannitol, maltitol, lactosol and sorbitol in sweeteners. The water retention agents include Trisodium Phosphate, disodium hydrogen Phosphate , pectin, propylene glycol alginate, xanthan gum, chitin, polydextrose, carrageenan, cordlan gum, hydroxypropyl starch and so on.

Curing Agent

Curing Agent,Mono Sodium Phosphate,Sodium Phosphate Monobasic,Food Curing Agent

Jiangsu Kolod Food Ingredients Co., Ltd. , http://www.kolodchem.com

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