COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. METHODOLOGY FOR CALCULATING TECHNOLOGICAL PARAMETERS OF FREE EXTRUSION AT INITIAL DEFORMATION BY BENDING

2021 ◽  
pp. 9-15
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Initial Deformation ◽  
Technological Parameters ◽  
Deformed State ◽  
Conical Bottom

All geometric formulas necessary for designing the process of extrusion of glasses with a conical bottom are obtained. Further, the obtained formulas will be used to develop scientifically based methods for calculating technological operations of free and constrained extrusion. The substantiation of the use of the wellknown methods of A. L. Vorontsov, developed for extrusion of glasses with a punch with a flat end, for calculating the deformed state of the workpiece is given.

Combined EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. METHODOLOGY FOR CALCULATING TECHNOLOGICAL PARAMETERS OF CONSTRAINED EXTRUSION AT INITIAL DEFORMATION BY BENDING

2021 ◽  
pp. 16-23
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Yield Stress ◽  
Initial Deformation ◽  
Maximum Pressure ◽  
Technological Parameters ◽  
Bottom Part ◽  
Hardening Material ◽  
Deformation Parameters ◽  
Stamping Process ◽  
Conical Bottom

The methodology for calculating the energy-power and deformation parameters of the process of constrained extrusion of glasses with a conical bottom part, starting with the bend of the workpiece. The extrusion of both non-hardening and hardening material is considered. In the latter case, the account of the hardening of the extruded material is described in detail. The above formulas allow us to determine such important parameters of the stamping process as total and specific deforming force, maximum pressure on the die wall, and an increase in the yield stress.

COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. THE RELEVANCE OF RESEARCH

2021 ◽  
pp. 2-6
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Technological Parameters ◽  
Successful Design ◽  
Conical Bottom

The urgency of the study of the main technological parameters of the process of combined extrusion of glasses with a conical bottom, necessary for the successful design of the operation, has been substantiated.

COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. KINEMATIC AND STRESS STATES OF THE PLASTIC AREA LOCATED UNDER THE CENTRAL FLAT SURFACE OF THE PUNCH

2021 ◽  
pp. 8-13 ◽  
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Plastic Deformation ◽  
Plastic Flow ◽  
Mathematical Analysis ◽  
Flat Surface ◽  
Technological Parameters ◽  
The Future ◽  
Stress States ◽  
Conical Bottom

For extrusion of glasses with a conical bottom using the method of plastic flow by A. L. Vorontsov, the kinematic and stress states of the extruded metal in the area of the plastic deformation center located under the central flat surface of the punch were determined. The formulas for the deforming force and the height of the zone of plastic deformation are obtained. In the future, the results of this mechanical and mathematical analysis will make it possible to formulate a scientifically grounded methodology for calculating the main technological parameters of extrusion of nozzles with a conical bottom, as well as to investigate the issue of the presence of the taper of the punch, which is optimal in strength.

scholarly journals Mathematical Modelling of Process of Shaping of Sand-Pitch Mixes

2019 ◽  
pp. 810-817
Author(s):  
Vitaliy Yu. Kulikov ◽  
Evgeniy N. Eremin ◽  
Tatyana V. Kovalyova ◽  
Elena P. Scherbakova
Keyword(s):  
Mathematical Modelling ◽  
Technological Process ◽  
Static Loading ◽  
Gas Permeability ◽  
State Density ◽  
Technological Parameters ◽  
Different Types ◽  
Deformed State

This article considers mathematical dependences of properties of a casting mold on various parameters of her shaping. The competitiveness in production of castings depends on durability, reliability of the made details, ability to meet requirements and expectations of the consumer of production. Technological process of receiving castings most widespread now in the sandyargillaceous forms (SAF) not completely meets the modern requirements as it is characterized by different types of marriage: gas porosity, scorch, shrinkable sinks, blockages, hot and cold cracks, and others. The bigger quality of castings gives casting in the sand-pitch forms (SPF) in which the high gas permeability and durability are combined, they don’t resist shrinkage, don’t absorb moisture the stiffening alloy and aren’t inclined to an fallibility. However, one of shortcomings of this way of casting is rather high cost binding. One of the directions of decrease in an expense binding is use along with heating of mix for shaping of a cover and static loading. Other direction of decrease in a consumption of mix in general, and binding in particular, is determination of dependence of properties of a shell form on technological parameters that will promote management of properties of a form, decrease in marriage, etc. Formulas of the intense deformed state, density, amounts of heat of the sand-pitch form made at the same time in the conditions of heating and static loading are presented

COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. METHODOLOGY FOR CALCULATING TECHNOLOGICAL PARAMETERS OF THE TRADITIONAL PROCESS OF CONSTRAINED EXTRUSION

2021 ◽  
pp. 2-8
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Yield Stress ◽  
Internal Cavity ◽  
Maximum Pressure ◽  
Technological Parameters ◽  
Bottom Part ◽  
Hardening Material ◽  
Deformation Parameters ◽  
Conical Section ◽  
Traditional Process ◽  
Conical Bottom

The methodology for calculating the energy-power and deformation parameters of the traditional process of constrained extrusion of glasses with a conical bottom part, including preliminary obtaining by molding the outer conical section of the bottom part of the product and the subsequent reverse extrusion of the glass with an internal cavity of the required geometry, is presented. The extrusion of both non-hardening and hardening material is considered. In the latter case, the account of the hardening of the extruded material is described in detail. The above formulas allow us to determine such important parameters of the stamping process as total and specific deforming force, maximum pressure on the die wall, and an increase in the yield stress.

scholarly journals TECHNOLOGY RESTORATION OF THE OPERATIONAL SPO-PROPERTY OF DEFORMED BUILDINGS BY THE MANAGEMENT OF THE SAME-BASE OF THE FOUNDATION BASES

2020 ◽  
Vol 3 (156) ◽  
pp. 116-120
Author(s):  
A. Yukhymenko ◽  
R. Samchenko
Keyword(s):  
Geodetic Survey ◽  
Initial Position ◽  
Base Layer ◽  
Stiffness Coefficient ◽  
Technological Parameters ◽  
Well Drilling ◽  
Drilling Rig ◽  
Negative Effect ◽  
Deformed State ◽  
Technological Impact

The developed method of restoring deformed and emergency buildings by controlling the foundation stiffness is presented. During the design and construction of buildings and structures, final stabilization deformations of the bases are calculated taking into account the loads, soil characteristics and the corresponding distribution of the base stiffness coefficient under the assumption that the base deformation process is almost completed. But in areas composed of structurally unstable soils, during the operation of structures, changes in the rigidity of the bases are possible due to the negative effect on the properties of the soils. To restore the operational suitability of damaged buildings, a method has been developed for eliminating their deformed state, which is based on the management of the stiffness of the bases. The concept of this method lies in the fact that in case of violation of the design distribution of the base stiffness coefficient, it is necessary to ensure recovery stiffness from the mirrored distribution of the destructive shift coe fficient. On the basis of geodetic survey data of a deformed building, a necessary pattern is determined for changing the foundation stiffness and the plot of the desired sediment of the foundation. The recovery sediments of the foundation provide for the desired epure, corresponding to the "new" distribution of stiffness by perforation of the base layer of limited thickness. Perforation under the foundations carry out the drilling of horizontal wells of the calculated parameters. Under the influence of the weight of the structure and additional technological impact, for example, moistening, the cavities of the wells are deformed, turning from round to ellipsoidal, the pillars of the soil and the arches between the wells are destroyed, filling the deformed cavities, the perforated base layer is compressed. Compression of the layer and sediments of the foundations occur in accordance with the calculated parameters of the wells. As a result, the foundations and, accordingly, the structures are returned to the design (initial) position. Keywords: deformation of objects, restoration of deformed buildings, base stiffness, sediment of foundations, roll removal, base perforation, horizontal well, drilling rig, technological parameters.

COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. CALCULATION OF GEOMETRIC PARAMETERS AND PREREQUISITES FOR CALCULATING THE DEFORMED STATE OF THE WORKPIECE

2021 ◽  
pp. 14-18 ◽  
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Geometric Parameters ◽  
Deformed State ◽  
Conical Bottom

All geometric formulas necessary for designing the process of extrusion of glasses with a conical bottom are obtained. Further, the obtained formulas will be used to develop scientifically based methods for calculating technological operations of free and constrained extrusion. The substantiation of the use of the wellknown methods of A. L. Vorontsov, developed for extrusion of glasses with a punch with a flat end, for calculating the deformed state of the workpiece is given.

COMBINED EXTRUSION OF GLASSES WITH A CONICAL BOTTOM. METHODOLOGY FOR CALCULATING TECHNOLOGICAL PARAMETERS OF THE TRADITIONAL FREE EXTRUSION PROCESS

2021 ◽  
pp. 19-24 ◽  
Author(s):  
A. L. Vorontsov ◽  
D. A. Lebedeva
Keyword(s):  
Extrusion Process ◽  
Internal Cavity ◽  
Maximum Pressure ◽  
Technological Parameters ◽  
Bottom Part ◽  
Hardening Material ◽  
Deformation Parameters ◽  
Conical Section ◽  
Traditional Process ◽  
Conical Bottom

The method of calculating the energy-power and deformation parameters of the traditional process of free extrusion of glasses with a conical bottom part, including preliminary formation of the outer conical section of the bottom part of the product by molding and the following reverse extrusion of the glass with an internal cavity of the required geometry. The extrusion of both non-hardening and hardening material is considered. In the latter case, the account of the hardening of the extruded material is described in detail. The above formulas allow us to determine such important parameters of the stamping process as total and specific deforming force, maximum pressure on the die wall, and an increase in the yield stress.

Comparison of Substructures Between Uniaxial and Biaxial Deformation in 1100-0 Aluminum

1981 ◽  
Vol 39 ◽  
pp. 52-53
Author(s):  
D. L. Rohr ◽  
S. S. Hecker
Keyword(s):  
Plastic Strain ◽  
Cell Walls ◽  
Room Temperature ◽  
Mechanical Response ◽  
Biaxial Tension ◽  
Initial Deformation ◽  
Uniaxial Deformation ◽  
Biaxial Deformation ◽  
Stress States ◽  
Comprehensive Study

As part of a comprehensive study of microstructural and mechanical response of metals to uniaxial and biaxial deformations, the development of substructure in 1100 A1 has been studied over a range of plastic strain for two stress states.Specimens of 1100 aluminum annealed at 350 C were tested in uniaxial (UT) and balanced biaxial tension (BBT) at room temperature to different strain levels. The biaxial specimens were produced by the in-plane punch stretching technique. Areas of known strain levels were prepared for TEM by lapping followed by jet electropolishing. All specimens were examined in a JEOL 200B run at 150 and 200 kV within 24 to 36 hours after testing.The development of the substructure with deformation is shown in Fig. 1 for both stress states. Initial deformation produces dislocation tangles, which form cell walls by 10% uniaxial deformation, and start to recover to form subgrains by 25%. The results of several hundred measurements of cell/subgrain sizes by a linear intercept technique are presented in Table I.

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