The impact of technological heredity on the accuracy of obtaining dimensions during the parts machining

Brylev, Brylev A.V.; Lizunov, I.V.; Nikolus, A.A.; Isaev, Yu.Yu.

doi:10.33920/pro-2-2201-06

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…It is known that during the finishing processing of surfaces, their quality received from previous passes affects the machining accuracy based on the principle of inheritance. In this case, the cutting force, its range of change and maximum value play an important role [8][9][10][11][12]. Therefore, in addition to the individual coaxiality errors formed during cutting of conical threads in different directions, the coaxiality errors of smooth conical surfaces under the thread also is a source of component of the overall thread alignment errors of threads formed by inheritance.…”

Section: Introductionmentioning

confidence: 99%

Improving of Machining Efficiency of Threads and Conical Surfaces of Diverse Directions by Managing Static Technological Relationships

Rasulov,

Nadirov,

Abbasova

2024

Advances in Science and Technology

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In the work, the design of the tool – boring bar for parallel machining of conical surfaces and threads in coupling-type parts with opposite directions, same inclination, coaxial conical surfaces and threads is given, and their generalized design features are presented for the machining of couplings of different types and sizes. With the application of the designed tool - boring bar to machining of inner surfaces of couplings, their machining accuracy, especially accuracy of coaxiality of threads, thus the load-carrying capacity of the couplings increases, the technological cost of their production is reduced, and the efficiency of their use is ensured.

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Section: Introductionmentioning

confidence: 99%

Improving of Machining Efficiency of Threads and Conical Surfaces of Diverse Directions by Managing Static Technological Relationships

Rasulov,

Nadirov,

Abbasova

2024

Advances in Science and Technology

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“…The specified errors in the shape of the workpieces on a certain scale are transferred to the manufactured parts and to the objects assembled from them [10,11]. In [11], the effects of technological heredity on the accuracy of obtaining dimensions during machining of machine parts were considered. Schemes for determining allowances for intermediate machining operations are considered.…”

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

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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.

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The impact of technological heredity on the accuracy of obtaining dimensions during the parts machining

Cited by 2 publications

References 4 publications

Improving of Machining Efficiency of Threads and Conical Surfaces of Diverse Directions by Managing Static Technological Relationships

Improving of Machining Efficiency of Threads and Conical Surfaces of Diverse Directions by Managing Static Technological Relationships

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

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