THE ANALISYS OF MOVEMENT IRREGULARITY AND THE DEFINITION OF DYNAMIC LOADS IN ELEMENTS OF THE RADIAL-FORGING MACHINE DRIVE

For the newly proposed pneumohydraulic drive of workpiece return movement it is researched relations, analysis was carried out and recommendations of selecting values of the initial pressure in the pneumatic chamber, ensuring a rational ratio between the periods of acceleration and deceleration were obtained. A mathematical model and program were created for the calculation of the law of motion of the brake rod with floating piston device using the system variable throttling the flow of the working fluid along the movement in the brake chamber. Based on the developed model the numerical analysis is made to assess the impact of the inner surface of the brake axle box on the final rate of the brake piston, as well as the effect of the location and change in the area of additional throttling apertures therein on the trend values of the maximum braking acceleration of moving masses. An algorithm of determining the constants and variables control law of motion, minimizing the maximum values of dynamic loads per cycle movement of the workpiece is obtained. It is shown that the proposed framework of the rod system of the workpiece return movement in the working cage with a floating piston ensures reduce the moving masses and increases the rigidity of the movable rod. The calculated relations for the definition of effort mobile carriage prop, providing gapless its support with mechanism of feed limit, are obtained.

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Integral assessment of stress-defomated condition of metal structures of machines under the action of static and dynamic loads

Automobile Roads and Road Construction ◽

10.33744/0365-8171-2021-110-188-196 ◽

2021 ◽

pp. 188-196

Author(s):

Ivan Nazarenko ◽

◽

Mykola Kuzminets ◽

Oleg Dedov ◽

Igor Zalіsko ◽

...

Keyword(s):

Equations Of Motion ◽

Steel Structures ◽

Theory Of Elasticity ◽

Dynamic Loads ◽

Simultaneous Action ◽

Structural Element ◽

Metal Structures ◽

Method Of Calculation ◽

Definition Of ◽

Integral Assessment

The article considers a system that combines the influence of static on dynamic loads on the example of the support-rotary circuit of a truck construction crane. The position of the system and its elements with the highest loads is revealed, the method of creating steel structures is investigated, each element, depending on the average load, experiences a stress-strain state. The basic laws of the theory of elasticity and plasticity were used to build a calculated mathematical model of the loaded support-rotary circuit. Equations of motion were compiled taking into account the behavior of structural elements and the machine as a whole under the simultaneous action of different loads. The calculation scheme was taken in the form of a structure consisting of rods rigidly connected to each other in nodes. As a method of calculation the method of finite elements with definition of displacements (deformations), efforts (stresses) in nodes of a grid of constructive elements of a design of a basic-rotary contour is applied. The stress distribution in each structural element depending on the type of load was obtained. This distribution allowed to choose rational parameters of a design in each its section. The proposed approach allowed to create a solid structure that provides reliability and economy of material. Thus, the results obtained allowed to fully analyze and decide on the simultaneous provision of strength, rigidity and minimum material consumption of the structure.

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

Russian Metallurgy (Metally) ◽

10.1134/s0036029519130238 ◽

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

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

Metallurgist ◽

10.1007/s11015-016-0225-7 ◽

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

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A New Approach to Precision Cropping with Radial Forging

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.3064 ◽

2011 ◽

Vol 291-294 ◽

pp. 3064-3068 ◽

Cited By ~ 1

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.

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

10.1063/1.4967031 ◽

2016 ◽

Cited By ~ 1

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

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

Metallurgist ◽

10.1007/s11015-009-9084-9 ◽

2008 ◽

Vol 52 (9-10) ◽

pp. 498-500 ◽

Cited By ~ 1

Author(s):

A. P. Karamyshev ◽

I. I. Nekrasov ◽

V. S. Parshin ◽

V. A. Systerov

Keyword(s):

Radial Forging ◽

Radial Forging Machine

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

High Temperature Materials and Processes ◽

10.1515/htmp-2014-0107 ◽

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.

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