Defi ning of strain non-uniformity during rods forging on lever-type radial-forging machine

2020 ◽  
pp. 115-118
Author(s):  
I.I. Nekrasov ◽  
A.A. Fedulov ◽  
V.S. Parshin
Keyword(s):  
Comparative Analysis ◽  
Feed Rate ◽  
Radial Forging ◽  
Fe Modeling ◽  
Radial Forging Machine

The results of the strain non-uniformity in the forging of rods on the radial-forging machine by using FE modeling are presented. Comparative analysis of the strain non-uniformity distribution in the fi nal product for the rods forging on the lever-type radial-forging machine and the swaging machine and for different values of feed rate of the rod to the lever-type radial-forging machine is carried out.

Maximum Feed in Forging in a Radial-Forging Machine with the Jigging Motion of Head Levers

2019 ◽  
Vol 2019 (13) ◽  
pp. 1456-1459
Author(s):  
I. I. Nekrasov ◽  
A. A. Fedulov ◽  
V. S. Parshin
Keyword(s):  
Radial Forging ◽  
Radial Forging Machine

Determination of Residual Ductility in the Forging of Bars on a Lever-Type Radial Forging Machine

Metallurgist ◽  
2016 ◽  
Vol 59 (11-12) ◽  
pp. 1122-1124
Author(s):  
A. P. Karamyshev ◽  
I. I. Nekrasov ◽  
V. S. Parshin ◽  
A. A. Fedulov ◽  
A. I. Pugin
Keyword(s):  
Radial Forging ◽  
Radial Forging Machine

A New Approach to Precision Cropping with Radial Forging

2011 ◽  
Vol 291-294 ◽  
pp. 3064-3068 ◽  
Author(s):  
Sheng Dun Zhao ◽  
Bin Zhong ◽  
Yong Tang ◽  
Ren Feng Zhao
Keyword(s):  
Radial Displacement ◽  
Experimental Results ◽  
Feasibility Analysis ◽  
Stress And Strain ◽  
Radial Forging ◽  
New Approach ◽  
Strain Concentration ◽  
Working Principle ◽  
Radial Forging Machine ◽  
Loading Sequence

This paper presents a new approach to precision cropping with radial forging, it skillfully utilizes the stress and strain concentration effect of the prefabricated V-shaped notch and the principle of the radial-forging machine to achieve the regular fracture of metal bar. The basic working principle of the new radial-forging cropping method is discussed in detail. Moreover, the distribution of the radial displacement loads is discussed in detail, and the loading rules are clearly explained under the conditions of the single cropping die, two cropping dies, three cropping dies and four cropping dies, as well as the radial-forging loading sequence. The model and equation of the movement with the radial-forging are established, the feasibility analysis of the radial-forging cropping method is carried out, which is in agreement with the experimental results.

AN APPROACH FOR COMPARATIVE PERFORMANCE TESTING OF SURGICAL BURS

2001 ◽  
Vol 01 (01) ◽  
pp. 45-51
Author(s):  
M. S. TAVAKOLI ◽  
BRETT POOLE
Keyword(s):  
Comparative Analysis ◽  
Feed Rate ◽  
Numerical Procedure ◽  
Performance Testing ◽  
Operating Conditions ◽  
Cutting Performance ◽  
Proof Of Concept ◽  
Comparative Performance ◽  
Feed Force ◽  
Constant Feed Rate

In this paper, a numerical procedure for obtaining a cutting performance "signature" for a bur is proposed. This procedure is applied to a comparative analysis of the cutting performance of a surgical bur under various operating conditions. An experimental method, which uses a constant feed rate and measures feed force, is utilized to perform tests leading to the data needed for the aforementioned procedure. Several proof-of-concept tests are performed and their results are presented. The proposed approach shows capability for tracking the cutting performance of a bur as it gets duller.

Finite Element Analysis Using Dynamic Material Model to Design Process Variables of Radial Forging

2013 ◽  
Vol 535-536 ◽  
pp. 284-287 ◽  
Author(s):  
Jeongsuk Lim ◽  
Young Seon Lee ◽  
Young Hoon Moon
Keyword(s):  
Grain Size ◽  
Finite Element ◽  
Strain Rate ◽  
Feed Rate ◽  
Rotation Angle ◽  
Material Model ◽  
Radial Forging ◽  
Forging Process ◽  
Dynamic Material Model ◽  
Radial Forging Process

In order to obtain a refined and uniform microstructure in the final billet, the radial forging process needs to be optimized and controlled with various process parameters such as temperature of ingot and die, die size, ram speed, upset ratio, etc. Grain size control is one of the most effective ways for the control of mechanical properties. The change in grain size is significantly related with strain, strain rate and temperature of forged part. To understand material properties and to analyze stability and instability area of forged workpiece, hot compression test of Ti-6Al-4V was carried out within the strain-rate range 10-2 to 10 s-1, and the temperature range 800 to 1100oC. And dynamic material map of Ti-6Al-4V was tabulated. In this study, a three-dimensional rigid-plastic finite element method(FEM) was used to analyze the radial forging process, focusing on the effects of feed rate and rotation angle for appropriate forging pass schedule. And the simulation result was confirmed with dynamic material model of Ti-6Al-4V. The optimal combination of feed rate and rotation angle has been determined by quantifying the radius profile in the longitudinal direction, roundness of the product and uniform strain distribution.

Studying the damage of ingots under plastic deformation on a lever-type radial forging machine

2016 ◽  
Author(s):  
A. P. Karamyshev ◽  
I. I. Nekrasov ◽  
A. V. Nesterenko ◽  
V. S. Parshin ◽  
S. V. Smirnov ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Radial Forging ◽  
Radial Forging Machine

Using an AVS radial-forging machine to prepare the ends of tubes for drawing

Metallurgist ◽  
2008 ◽  
Vol 52 (9-10) ◽  
pp. 498-500 ◽  
Author(s):  
A. P. Karamyshev ◽  
I. I. Nekrasov ◽  
V. S. Parshin ◽  
V. A. Systerov
Keyword(s):  
Radial Forging ◽  
Radial Forging Machine

Research on the Influence of Technological Forging Parameters on the Quality of Biphasic Titanium Alloys

2015 ◽  
Vol 34 (8) ◽  
Author(s):  
S. A. Mashekov ◽  
N. T. Smaylova ◽  
A. M. Alshynova ◽  
A.S. Mashekova
Keyword(s):  
Titanium Alloys ◽  
Quantitative Data ◽  
Strain State ◽  
Radial Forging ◽  
Optimum Size ◽  
Stress Strain ◽  
Rational Technology ◽  
Deflected Mode ◽  
Radial Forging Machine

AbstractThe deflected mode (DM) during the preparation of the broach in the flat and combined baizes and also on radial forging machine (RFM) was investigated for creating the rational technology of a broach and determining the optimum size of the angles of rotation and single squeeze reduction. The quantitative data was obtained by the method of final elements and the MSC.Super Forge program; the main consistent patterns of stress–strain state (SSS) distribution and temperature while modeling forging in flat and combined baizes, also on RFM with various angles of rotation and sizes of squeeze reduction were determined. The rational trial technology of forging of biphasic titanium alloys was developed and tested.

Sign in / Sign up

Export Citation Format

Share Document