Synkov V. The development of methods for designing a tool for cold extrusion and hydrostatic working of materials.

Українська версія

Thesis for the degree of Doctor of Science (DSc)

State registration number

0506U000456

Thesis Registration Form

0506U000456.pdf

Applicant for

Specialization

  • 05.03.05 - Процеси та машини обробки тиском

22-06-2006

Specialized Academic Board

Д12.105.01

Essay

The dissertation work is devoted to theoretical and experimental investigation of the stressed-strained and limiting state (SSLS) of the tool for cold extrusion and hydrostatic working (HSW) of porous and solid billets by means of hydrostatic extrusion (HE), twist extrusion (TE) and reversed closed broaching (RCB) with backpressure and magnetic field application. Procedures of SSLS analisis have been developed for the tool of wall thickness varying as a result of load application at different parts thereof, more severe ones that are realised at different stages of extrusion process have been determined , an algorithm is proposed to construct limiting-state diagrams for calculating the optimal banding of the unit , and a method early diagnostics of the acts of plasticity or destruction of die elements has been developed. It has been ascertened that the strength designing of the tool with a variable wall thickness by using the Lame-model results in large errors, so corrections need be made. Algorithms for calculating tool parameters have been developed. A mathematical model of HE of porous ortotropic wire-element packet has been for the first time proposed, stationary conditions for producing microfibres and boundary conditions for tool designing have been determined. By investigating the strength conditions of HE, TE and RCB it the punch may increase by a value which is several times as commensurable the backpressure

Read more

Files

Автореферат.doc

Введение.doc

Литература.doc

Приложение--Акт ДонФТИ.jpg

Приложение--Акт ИФГП.jpg

Приложение--Акт Синтра.jpg

Приложение--Акт внедрения продолж.tif

Приложение--Акт внедрения.tif

Приложение--Акт использования.tif

Приложение--Акт о проделан работе.tif

Приложение--Выписка ДонФТИ продолж.tif

Приложение--Выписка ДонФТИ.tif

Приложение--Выписка ИПП.jpg

Приложение--Отзыв продолжение.tif

Приложение--Отзыв.tif

Приложение--Перечень документов.jpg

Приложение--Продолжение .tif

Приложение--Продолжение акта.tif

Раздел 1.doc

Раздел 2.doc

Раздел 2.doc

Раздел 3.doc

Раздел 3.doc

Раздел 4.doc

Раздел 5.doc

Раздел 5.doc

Раздел 6.doc

Раздел 7.doc

Раздел 7.doc

Раздел 8.doc

Содержание.doc

Титульный лист.doc

Условные обозначения.doc

Similar theses

0424U000044

Andrii Shtuts

Improvement of rolling stamping processes on the basis of modeling of the mechanics of forming blanks

0421U103937

Glazko Vladyslav V

The improvement of the design of the elastomeric compensator for eccentric loads of the "press-die" system with parallel transfer of the technological force vector

0421U103225

Mishchenko Oleksii V

Development of the theory of formation and reduction of the transverse wall thickness variation of cold-rolled tubes from titanium alloys

0521U101599

Borovik Pavel Vladimirovich

Development of theoretic foundations and improvement of technology and equipment of separation operations processes in rolling production

0521U101565

Hrudkina Natalia

Development of energy methods for the analysis of technological modes and improvement the processes of precise volumetric stamping by extrusion.