Production of bottom flange shells by cold extrusion on specialized press

2021 ◽  
pp. 450-458
Author(s):  
A.M. Dmitriev ◽  
N.V. Korobova
Keyword(s):  
Cold Extrusion ◽  
Outer Diameter ◽  
Bottom Flange ◽  
Technological Solution ◽  
Shell Wall ◽  
Corrosion Resistant ◽  
Direct Extrusion ◽  
Intractable Problems

The possibility for manufacturing by cold extrusion of part such as shells made of corrosion-resistant and higstemperature steel is evaluated. It is shown that when extrusion such parts using combination of direct extrusion from workpiece with diameter equal to the diameter of the flange, followed by direct extrusion of the shell wall, number of intractable problems arise. Some of these problems relate to the design of production die to be fitted to mass produced standard presses. It is proposed to manufacture parts of the type using combination of extrusion of the shell walls from workpiece with diameter equal to its outer diameter, with simultaneous radial extrusion of the flange. Such technological solution can be implemented on domestic specialized presses.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. EXPERIMENTAL VERIFICATION OF THEORETICAL RESULTS ON HARDENING MATERIAL

2020 ◽  
pp. 17-24
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Experimental Verification ◽  
Theoretical Calculations ◽  
High Accuracy ◽  
Geometric Parameters ◽  
Strength Characteristics ◽  
Bottom Flange ◽  
Hardening Material ◽  
Direct Extrusion ◽  
Theoretical Results

The results of an experimental verification of the obtained theoretical formulas on hardening material are presented, which make it possible to determine the most important parameters for extruding glasses with a counter-punch. The methods of theoretical calculations and the characteristics of the tools used, the geometric parameters of extrusion experiments, the strength characteristics of the wrought material, and its lubrication are described in detail. The high accuracy of the obtained calculation formulas is confirmed.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. INITIAL EXPERIMENTAL VERIFICATION OF THEORETICAL RESULTS

2020 ◽  
pp. 10-16
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Experimental Verification ◽  
Hot Deformation ◽  
High Accuracy ◽  
Geometric Parameters ◽  
Strength Characteristics ◽  
Bottom Flange ◽  
Hardening Material ◽  
Direct Extrusion ◽  
Deformable Materials ◽  
Theoretical Results

The goals of experimental verification of theoretical results are formulated. The results of an experimental verification of the obtained theoretical formulas are presented, which make it possible to determine the most important parameters for extruding glasses with a counter-punch. The characteristics of the tools used, the geometric parameters of the extrusion experiments, the strength characteristics of deformable materials, and their lubrication are described in detail. Studies of extrusion of non-hardening material simulating hot deformation are carried out. The high accuracy of the obtained calculation formulas is confirmed.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. DETERMINATION OF THE DEFORMED STATE DURING CONSTRAINED EXTRUSION IN THE FOURTH CENTRAL REGION PLASTIC DEFORMATION

2020 ◽  
pp. 8-16 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Plastic Deformation ◽  
Plastic Flow ◽  
Central Region ◽  
Bottom Flange ◽  
Direct Extrusion ◽  
Deformed State ◽  
General Method

The formulas necessary for calculating the accumulated deformations obtained in the process of constrained extrusion of the central region based on the working end face of the counter-punch are obtained. To derive the formulas, the general method of plastic flow A. L. Vorontsova. The obtained formulas allow us to determine the deformed state of the workpiece at any point in this area. Further, these formulas will be used to take into account the hardening of the extruded material.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. DETERMINATION OF THE DEFORMED STATE IN THE SECOND PERIPHERAL REGION OF PLASTIC DEFORMATION

2020 ◽  
pp. 13-17 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Plastic Deformation ◽  
Plastic Flow ◽  
Peripheral Region ◽  
Bottom Flange ◽  
Direct Extrusion ◽  
Deformed State ◽  
Theory Of Plastic Flow ◽  
Accumulated Deformation ◽  
Peripheral Regions

Using the theory of plastic flow according to the method of A. L. Vorontsov, formulas are obtained that are necessary for calculating the accumulated deformations obtained by extruding with a counter-punch a peripheral region adjacent to a container with a matrix. The average accumulated deformation in both peripheral regions was determined.

scholarly journals Process modeling of sequential radial-direct extrusion using curved triangular kinematic module

2021 ◽  
Vol 49 (1) ◽  
pp. 56-63
Author(s):  
Natalia Hrudkina
Keyword(s):  
Process Modeling ◽  
Deformation Process ◽  
Metal Flow ◽  
Vertical Component ◽  
Radial Component ◽  
Cold Extrusion ◽  
Direct Extrusion ◽  
Relative Strain ◽  
Power Mode ◽  
Theoretical Results

In this article new engineering calculations such as the value of the relative strain pressure for the combination of a triangular kinematic module with external modules of various configurations are developed. This allowed us to describe qualitatively the nature of the metal flow in the reversal zone before radial extrusion. This made it possible to achieve a decrease in the predicted assessment of the power mode for the deformation process with comparison by the use of rectangular modules. The greatest reduction in the value of the relative strain pressure corresponded to a combination with an adjacent rectangular module (with the missing vertical component CPVF) and can obtain 7-8%. The deviation of the theoretical results in the power parameters of the process by using a triangular kinematic module are 12-15% for a process with a developed flow radial component. The resulting calculations can be used to model new cold extrusion processes.

scholarly journals Cold Extrusion of Spur Gear with Inner Spline with Reductionin Outer Diameter or Expansion of Inner Diameter of Workpiece

2013 ◽  
Vol 54 (626) ◽  
pp. 262-266
Author(s):  
Hajime YOSHIDA ◽  
Yoshihisa SAKAIDA ◽  
Tamotsu NAKAMURA ◽  
Kunio HAYAKAWA ◽  
Akira ISOGAI ◽  
...  
Keyword(s):  
Spur Gear ◽  
Cold Extrusion ◽  
Outer Diameter ◽  
Inner Diameter

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. EXPERIMENTAL VERIFICATION OF THEORETICAL RESULTS AT DIFFERENT TAPER ANGLES OF THE MATRIX

2020 ◽  
pp. 10-16 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Experimental Verification ◽  
Theoretical Calculations ◽  
High Accuracy ◽  
Geometric Parameters ◽  
Bottom Flange ◽  
Hardening Material ◽  
Direct Extrusion ◽  
The Matrix ◽  
Deformable Materials ◽  
Theoretical Results

The results of an experimental verification of the obtained theoretical formulas are presented, which make it possible to determine the most important parameters for extruding glasses with a counter-punch at different taper angles of the matrix. The characteristics of the tools used, the geometric parameters of extrusion experiments, the strength characteristics of deformable materials, and their lubrication are described in detail. Extraction studies of both non-hardening and hardening material have been performed. The methodology for performing theoretical calculations is shown in detail. The high accuracy of the obtained calculation formulas is confirmed.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. DETERMINATION OF KINEMATIC AND STRESS STATES IN THE THIRD CENTRAL REGION OF PLASTIC DEFORMATION

2020 ◽  
pp. 20-23 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Plastic Deformation ◽  
Plastic Flow ◽  
Central Region ◽  
Bottom Flange ◽  
Direct Extrusion ◽  
The Third ◽  
Stress States ◽  
Theory Of Plastic Flow

Using the theory of plastic flow according to the method of A. L. Vorontsov, the formulas are obtained that are necessary for calculating the stresses and force parameters of extrusion with a counter-punch of the central region of plastic deformation adjacent to the formed wall of the product.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. METHODOLOGY FOR CALCULATING TECHNOLOGICAL PARAMETERS FREE EXTRUSION PROCESS

2020 ◽  
pp. 17-24 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Yield Stress ◽  
Extrusion Process ◽  
Maximum Pressure ◽  
Bottom Flange ◽  
Technological Parameters ◽  
Hardening Material ◽  
Direct Extrusion ◽  
Deformation Parameters ◽  
The Matrix ◽  
Deforming Forces

The methodology for calculating the energy and deformation parameters of the processes of free extrusion of glasses with a counter-punch is described. Extrusion of both non-hardening and hardening material is considered. In the latter case, accounting for 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 the total and specific deforming forces, maximum pressure on the matrix wall, and increase in yield stress.

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