Limiting deformation in rotary drawing of anisotropic pipe blanks with wall thinning

Yakovlev, S. P.; Трегубов, В. И.; Osipova, E. V.

doi:10.3103/s1068798x16060204

Cited by 4 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The disadvantage of this technology are the errors in the shape of the blanks, amounting to 0,75-1.5 of the tolerance for diametrical dimensions [2][3][4][5][6][7][8][9]. When machining by cutting, these errors decrease according to the laws of copying the errors [2,3,10], however, the anisotropy of the material of the original workpiece leads to the appearance of errors in the shape-ovality and curvature of the pipe.…”

Section: Introductionmentioning

confidence: 99%

Relationship of the method of obtaining the original billet with the accuracy of manufacturing of the extended axisymmetric bodies

Yamnikov¹,

Rodionova²,

Матвеев³

2020

cisisr

View full text Add to dashboard Cite

A comparative description of the technology for producing blanks for the artillery shell cases or the rocket shell bodies using flat rolled stock or rolled tubular products is given. It is noted that the lower cost of flat rolled stock leads to its wider application for stamping blanks of cartridge caps or bodies, including cutting a circle from flat rolled stock, convolution and several transitions of drawing, alternating with heat treatment. It is noted that the disadvantage of this technology are the errors in the shape of the blanks, amounting to 0.75÷1.5 of the tolerance for diametrical dimensions. When machining, these errors decrease according to the laws of copying the errors, however, the anisotropy of the material of the part blank leads to the appearance of errors in the shape-ovality and curvature of the pipe, which lead to the formation of a large radial runout of the prefabricated rocket body. It has been found that the scattering fields of all output quality parameters exceed the existing tolerances: radial runout of the assembled body by 1.3 times; ovality of the middle centering bulge by 2.15 times. It is shown that the technological process of manufacturing prefabricated housings using initial blanks from flat rolled stock does not provide the required precision technology reliability. For the manufacture of monolithic extended axisymmetric bodies, hot-rolled thickwalled pipes are used as an initial billet. The operations are performed in the following sequence: cutting pipes into dimensional workpieces; machining (turning, boring); heat treatment (quenching, tempering); machining (fine turning, boring); rotary drawing (first and second transitions); crimping the thickening; low temperature annealing. Statistical studies have found a regression equation showing at a confidence level β = 0.95, dependence of the diameter of the base hole of the workpiece after drawing in from the current value of the diameter before drawing.

show abstract

Section: Introductionmentioning

confidence: 99%

Relationship of the method of obtaining the original billet with the accuracy of manufacturing of the extended axisymmetric bodies

Yamnikov¹,

Rodionova²,

Матвеев³

2020

cisisr

View full text Add to dashboard Cite

show abstract

Development of equipment for forming thin-walled precision pipes from titanium alloys and corrosion-resistant steels

Vasechkin¹,

Egorov²,

Davydov³

et al. 2022

International Scientific and Practical Symposium "Materials Science and Technology" (MST2021)

View full text Add to dashboard Cite

Design and technological support for the assembly of long thin-walled buildings

Yamnikov

Rodionova

Матвеев³

2021

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

The article considers the issue of design and technological support for the assembly of extended thin-walled buildings, in particular, the problem of ensuring their entry into the reciprocal parts that ensure the functioning of the assembled products. A new method for controlling the size of the entry of buildings is proposed. The objective of the technical solution is to reduce the complexity of control of the hulls while ensuring their entry into launch tubes. The method consists in the fact that the housing is installed in two prisms according to the extreme centering thickenings. The readings of the measuring device are taken, which judge the suitability of the housing by the diameter of the adjacent cylinder, characterized in that the indicator is installed in a plane perpendicular to one of the faces of the prism, adjusted according to the standard when touching the tip of the middle centering thickening of the standard. As a result of testing in the conditions of the current production, it was found that the verification of the product is reduced several times.

show abstract

Limiting deformation in rotary drawing of anisotropic pipe blanks with wall thinning

Cited by 4 publications

References 1 publication

Relationship of the method of obtaining the original billet with the accuracy of manufacturing of the extended axisymmetric bodies

Relationship of the method of obtaining the original billet with the accuracy of manufacturing of the extended axisymmetric bodies

Development of equipment for forming thin-walled precision pipes from titanium alloys and corrosion-resistant steels

Design and technological support for the assembly of long thin-walled buildings

Contact Info

Product

Resources

About