Processing and manufacturing method of cylinder body prepared from alloyed tool steel 5CrNiMn material
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An alloy tool steel, processing and manufacturing technology, applied in the field of comprehensive machining, can solve the problems of increased cutting cost, increased tool loss, prolonged processing time, etc., to improve mechanical properties and processing performance, improve hardness and bending strength. , the effect of eliminating residual stress
Inactive Publication Date: 2016-05-18
WUXI QIAOYANG MACHINERY MFG
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Developed countries have carried out research on the machinability of alloy tool steel materials as early as forty years in the last century. After decades of research and development, the machinability of high-strength alloy tool steel has been significantly improved. Compared with foreign forgings, there is no obvious difference in the dimensional deviation, machining allowance, surface quality, white corners, hard spots, etc. of the processed forgings, and there is no abnormality in the strength, hardness, and metallographic structure of the forging materials, and The processing tool wears a lot, the processing time is long, and the surface roughness of the forging is poor. Taking the engine cylinder casting as an example, the service life of the tool when processing the domestic cylinder bl
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[0006] Example one
[0007] A processing and manufacturing method of cylinder body is designed. The material is alloy tool steel 5CrNiMn, and the percentage content of each component is: Ni0.3%, Cr0.31%, C0.6%, Mn0.9%, Sb0.1%, Ti0.26%, V0.05%, Pb0.25%, S <0.3%, P <0.02%, and the rest is iron and its impurities. The processing technology used is: (1) Upsetting and drawing the long bar material, after turning it over, the forging is made into a cylinder again, and the heating should be even during the upsetting process , Make the deformation uniform, and the upsetting surface should be perpendicular to the axis, and at the same time control the original height and diameter ratio of the blank to less than 2.4. After multiple upsetting, the blank is made on the upsetting table to make the blank basically conform to the shape of the eccentric sleeve , (2) Forging the eccentric sleeve, first put the eccentric sleeve into the pre-forging die cavity, and make the lower die connected with...
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[0008] Example two
[0009] A processing and manufacturing method of cylinder body is designed. The material is alloy tool steel 5CrNiMn, and the percentage content of each component is: Ni1.3%, Cr0.42%, C0.9%, Mn1.5%, Sb0.5%, Ti0.45%, V0.2%, Pb0.78%, S <0.3%, P <0.02%, and the rest is iron and its impurities. The processing technology used is: (1) Upsetting and drawing the long bar material, after turning it over, the forging is made into a cylinder again, and the heating should be even during the upsetting process , Make the deformation uniform, and the upsetting surface should be perpendicular to the axis, while controlling the original height and diameter ratio of the blank to be less than 2.4. (2) Forging the eccentric sleeve, first put the eccentric sleeve into the pre-forging die bore, Make the lower die connected with the die pad and the upper die that is forbidden on the vertical head move up and down together, so that the blank fills the entire die cavity under the acti...
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Abstract
The invention discloses a processing and manufacturing method of a cylinder body prepared from an alloyed tool steel 5CrNiMn material and belongs to the technical field of integrated machining. The cylinder body is characterized in that a billet is obtained by forging forming; the billet is subjected to annealing to remove internal stress and subsequently undergoes machining, carbonitriding, deposition treatment and shot peening strengthening; multiple times of upsetting are performed in the forging process of a cylinder body blank, so that the tearing of a forge piece is avoided, structures become uniform and crystal grains are refined; upset billets are formed on an upset place, so that metal is reasonably distributed and is well fully fills a die cavity; the cylinder body is machined by turning, boring and honing; in the processing process, trace atomized tiny water droplet cutting fluid is fed to a cutting zone through low-temperature cold air for cooling and lubricating, so that the outflow direction of a rotary tool is identical with that of cutting chips, the circumferential speed of a cutting edge is greater than the outflow speed of the cutting chips, and further the formation of mechanical tumors is avoided; and then surface treatment and deposition treatment are performed on an engine cylinder body. The cylinder body processed by the manufacturing method is high in wear resistance and long in service life; in addition, the precision accords with standards; and meanwhile, the hardness and bending strength of cylinder body surface are also improved.
Description
technical field [0001] The invention belongs to the technical field of comprehensive mechanical processing, and the invention relates to an alloy tool steel 5CrNiMn and a cylinder body thereof. In particular, a method for processing and manufacturing a cylinder block made of alloy tool steel 5CrNiMn. Background technique [0002] As far as processing materials are concerned, there have always been many differences in the processing performance of alloy tool steels at home and abroad. Developed countries have carried out research on the machinability of alloy tool steel materials as early as forty years in the last century. After decades of research and development, the machinability of high-strength alloy tool steel has been significantly improved. Compared with foreign forgings, there is no obvious difference in the dimensional deviation, machining allowance, surface quality, white corners, hard spots, etc. of the processed forgings, and there is no abnormality in the stre...
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