Stress state and deformability of metal in axisymmetric extension

Sosenushkin, E. N.; Yanovskaya, E. A.; Emelyanov, V. M.

doi:10.3103/s1068798x15060180

Cited by 6 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In mechanical engineering, body thin-walled parts of the Box type are widely used [1]. These parts are obtained by stamping [2,3,4], which makes it possible to obtain extended solid thin-walled parts with high mechanical characteristics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of spring action of a non-rigid body stamped from 30KhGSA steel sheet on the accuracy of machining

Danilenko¹,

Malikov²,

Yamnikov³

2022

cisisr

View full text Add to dashboard Cite

The high mechanical properties of 30KhGSA steel create a spring action effect when a non-rigid box-shaped body is fixed in a machine fixture. Comparisons are made between the results of mathematical simulation of elastic deformations of the base wall of a non-rigid box-shaped body when fixed in a fixture for machining and statistical processing of the results of an experimental study of changes in the dimensions obtained during machining, specified from the base wall of the body, under comparable conditions. The mathematical simulation of elastic deformations of the base wall of a non-rigid box-shaped hull under given conditions and assumptions showed that the displacement curve of the base wall of the body with a concave bottom at a measurement height of more than 50 % of the body height implies displacements approximately two times greater than for the displacement curve of the base wall of the body with a convex bottom. To assess the accuracy of fulfilling the dimensions specified from the base wall of the body, two test batches of non-rigid box-shaped housings were made in an amount of 10 pieces. Bodies with non-flatness of the base surface in the form of concavities were selected in the first batch, in the form of convexities in the second batch. Dimensional measurements were made at a height of 75 % from the bottom of the box body, as the closest to the maximum height values in the mathematical experiment. Statistically significant coefficients are found in the equations of regression of the errors in the dimensions x, y, z from the concavity of the base surface EFK of the bottom of a non-rigid box-shaped body. Regression coefficients for given sizes are ambiguous for bodies with a concave and convex bottom. Such a difference in the experiment can be explained by the presence of local shape errors on some workpieces. For one size there is a tenfold ratio of coefficients; at the same time, for another size in the equations, this ratio is close to unity. Such a difference in the experiment can be explained by the presence of local shape errors on some workpieces.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Designs for determining allowances at intermediate machining operations are considered. In other words, the known methods of shaping box-shaped profiles [1][2][3][4][5] do not allow them to be obtained without distortion.…”

Section: Introductionmentioning

confidence: 99%

Effects of spring action of a non-rigid body stamped from 30KhGSA steel sheet on the accuracy of machining

Danilenko¹,

Malikov²,

Yamnikov³

2022

cisisr

View full text Add to dashboard Cite

show abstract

Influence of the Shape Error of Measuring Base on the Accuracy of Manufacturing Parts from Stamped Blanks

Yamnikov

Danilenko²

2022

Meas Tech

View full text Add to dashboard Cite

Analysis of the Effect of Deformations on the Accuracy of Advanced Engineering Products

Yamnikov

Матвеев

Rodionova

2021

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

View full text Add to dashboard Cite

In the manufacture of thin-walled special products, errors in the profile of the finished surfaces usually appear, even if all known recommendations and the technological process are followed. In many cases, this is due to the manifestations of the transfer of manufacturing errors, through the distribution of residual stresses generated in the operation of obtaining a workpiece. According to the theory of technological inheritance of errors, when the allowance is removed from the machined surface, stress distribution in the workpiece also occurs, and this can lead to distortion of the shape of the base surface when the product is unfastened. To clarify this hypothesis, a number of experiments were made in production, in which both the processed and the base surfaces of the workpiece were investigated. The results showed that immediately after processing, the error in the profile of the processed surface at the point of fixation tends to zero, and during the fixing, errors occur, and these errors are an order of magnitude smaller than before processing. At the maximum distance from the attachment point, the picture changes: after processing, there are minor profile errors, which disappear after the attachment. The assumption about the distortion of the shape of the base surface relative to the initial one was confirmed. The angular position of the errors relative to the initial one has changed, and the size has also decreased by 0.02 mm.

show abstract

Stress state and deformability of metal in axisymmetric extension

Cited by 6 publications

References 5 publications

Effects of spring action of a non-rigid body stamped from 30KhGSA steel sheet on the accuracy of machining

Effects of spring action of a non-rigid body stamped from 30KhGSA steel sheet on the accuracy of machining

Influence of the Shape Error of Measuring Base on the Accuracy of Manufacturing Parts from Stamped Blanks

Analysis of the Effect of Deformations on the Accuracy of Advanced Engineering Products

Contact Info

Product

Resources

About