(1) All components of the integral crankshaft are an inseparable whole. The utility model has the advantages of simple structure, easy processing, small quality, low cost and reliable work. At present, it is widely used in small and medium-sized internal combustion engines (such as WD615 series, NT/NTA855 and other diesel engines).
(2) The components of the combined crankshaft are manufactured separately and then assembled into a unitary body. The advantage is that the spindle journal can adopt rolling bearing, the friction resistance is small, and a certain component can be replaced after being damaged,
As for the scrapping of the entire crankshaft. However, its structure is complex, processing precision is high, and cost is quotient.
The crankshaft is supported on the crankcase by the main journal, and can be divided into full-support and non-full-support depending on the form of support.
A crankshaft with a main journal between adjacent cranks is called a fully supported crankshaft, otherwise it is called a non-fully supported crankshaft.
The fully supported crankshaft of the diesel generator is characterized by one more spindle than the number of cylinders and good rigidity, but the overall crankshaft size is long (such as NT/NTA855 and WD615 series diesel engines). The non-fully supported crankshaft is characterized by a smaller number of spindle necks than the number of cylinders, a simple structure, a short total crankshaft length, but poor rigidity.
BRIGHT STEEL BAR
Bright steel bar is carbon or alloy steel bar with shining bright surface which is improved by cold drawing, peeling, turning, grinding and polishing over hot rolled black surface bars. By cold drawing, the steel bar yield strength and tensile strength will be improved. By peeling and turning, the surface imperfections will be removed. By grinding, the diameter tolerance will be more precision. By polishing, the surface will be much more shining.
Except the shining bright surface, comparing with the hot rolled black surface bars, the bright steel bars has better surface roughness, better roundness, straightness, more precision size tolerance etc.
Heat treatment such as annealing, normalizing, quenching and tempering will be done before do cold finishing on the hot rolled bar to get bright steel bar, in such condition, the steel bright bar will get most suitable mechanical properties to meet different application requirement.
The advantages of steel bright bars we supply:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Heat treating furnaces to adjust the mechanical properties
3) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
4) Multiple packages to avoid broken packages and anti-rusty
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Diameter tolerance |
+0/-0.02mm |
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Straightness |
0.5mm/m |
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Surface roughness |
0.4um |
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Roundness |
80% of diameter tolerance |
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Diameter range |
14mm to 100mm |
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Steel grade |
Kinds of carbon steel and alloy steel |
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Length |
Any length can be cut with precision tolerance |
Bright Steel Bar,Bright Steel Round Bar,Steel Bright Bar,Bright Polished Steel Bar,Alloy Steel Bright Bar Manufacturer
SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.js-luggagecarts.com