scholarly journals Force and pressure function formulation for direct cold extrusion of aluminum alloy Al 1350 using regression method

2021 ◽  
pp. 38-43
Author(s):  
Fadi Alfaqs ◽  
Ghazi S Marahleh
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Extrusion Process ◽  
Regression Method ◽  
Cold Extrusion ◽  
Extrusion Force ◽  
Mathematical Tool ◽  
Extrusion Dies ◽  
Mathematical Formulas

Purpose. Establishing methodology in order to determine mathematically both extrusion force and pressure functions for Aluminum alloy AL 1350 using the regression method of experimental data. Methodology. Several variables (diameter of the cavity for pressing D, degree of extrusion, angle of the punch head cone 2, and ratio of the semi-finished sizes Rs) were included when using the regression method considered. Findings. Diameter and strain were found to play a significant role in predicting both extrusion force and pressure functions associated with the extrusion process. Mathematical formulas for force and pressure were obtained using the regression method. Amethodology has been developed for the mathematical determination of extrusion force and pressure. Originality. Force and pressure functions in direct cold extrusion process are mainly required for the design of extrusion dies. However, the existence of such data in the literature is insufficient to implement the process for direct cold extrusion of aluminum and aluminum alloys as well as for other materials. Results of the study consider the main factors influencing extrusion force and pressure as well as the main differences for types of aluminum alloys. Practical value. The mathematical formulas obtained by the regression method provide a mathematical tool for calculating force and pressure values in direct extrusion process.

Cold extrusion of conical cups with cylindrical cavity

2016 ◽  
Vol 1 (1) ◽  
pp. 8-14 ◽  
Author(s):  
Н. Коробова ◽  
N. Korobova ◽  
А. Дмитриев ◽  
A. Dmitriev ◽  
Н. Толмачев ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mathematical Model ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Cold Extrusion ◽  
Extrusion Force ◽  
Low Carbon ◽  
Cylindrical Punch ◽  
The Mathematical Model

The method and results of the study of reverse extrusion of billet by cylindrical punch in a conical expanding matrix are described. The mathematical model, which we developed for the determination of specific extrusion force, is described too. The study by statistical method verified the adequacy of the model. This model made possible to assess the resistance of punches and showed the ability to produce deformation of a billet made of low carbon steel without heating. The developed process includes the operation of segmenting of the cylindrical workpieces from bar, heat treatment, lubrication and extrusion of the workpieces. The two-way cold extrusion of a billet is produced in a matrix alternatively by two punches. The design of the stamp is described. The stamp is specialized for reverse extrusion of a billet. In its construction the moving mechanism of action of the two alternately punches in one matrix is used.

Solid Welding Conditions for Seam and Hollow Extrusion Process of 7075 Aluminum Alloy

2011 ◽  
Vol 479 ◽  
pp. 62-73 ◽  
Author(s):  
Quang Cherng Hsu ◽  
Kun Hong Kuo ◽  
Chi Peng Hsu
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Cross Sections ◽  
High Strength ◽  
Extrusion Process ◽  
Protective Atmosphere ◽  
Porthole Die ◽  
Die Structure ◽  
Welding Strength ◽  
Good Agreement

Direct extrusion by porthole – bridge die configuration has been successfully used to fabricate products with hollow cross sections for 6000 series aluminum alloys. However, if for 7000 series aluminum alloys, this situation alerts since different alloy composition such as Cu causing hollow extrusion failed due to not enough welding strength in seam. In order to determine the solid welding conditions during hollow extrusion with porthole die structure for high strength aluminum alloy, an easy tooling configuration has been designed. The proposed method is easy and cheap because there is no necessary to conduct experiment in controlled environment such as in vacuum chamber of Gleeble test or in a protective atmosphere. A seam and hollow extrusion for square tube has been conducted to obtain the welding strength comparison to the proposed solid welding method which shows good agreement.

Determination of radiogenic silicon and its isotopes in neutron irradiated aluminum alloys by ICP-MS

2016 ◽  
Vol 31 (6) ◽  
pp. 1174-1178 ◽  
Author(s):  
Y. Shi ◽  
C. Broome ◽  
R. Collins
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Nuclear Reactors ◽  
Icp Ms ◽  
Component Material

Aluminum alloy is frequently used as component material in research nuclear reactors.

Simulation of Compound Cold Extrusion Al-Zn-Mg-Cu Alumium Alloys

2012 ◽  
Vol 159 ◽  
pp. 257-261
Author(s):  
Zhi Ming Zhou ◽  
Wei Jiu Huang ◽  
Zhen Zhao ◽  
Bin Bin Lei ◽  
Chun Liu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Automotive Industry ◽  
Maximum Stress ◽  
Effective Strain ◽  
High Strength ◽  
Extrusion Process ◽  
Cold Extrusion ◽  
Processing Route ◽  
Deep Hole ◽  
Deform 3D

Al-Zn-Mg-Cu super-high strength aluminum alloy is widely used in the aerospace and automotive industry. However, the extrudability of Al-Zn-Mg-Cu aluminum alloy is relatively poor compared with other series of aluminum alloys. The simulation of compound cold extrusion process of Al-Zn-Mg-Cu aluminum alloy was studied for the production of a double-cup workpiece with a deep wobbler hole in this paper. The effective strain and stress distribution of the alloy during cold extrusion were studied by Deform-3D simulation. The results show that the maximum stress was concentrated at the bottom of the deep hole. Cracks were easily to be occured near the bottom of deep-hole. Based on the experimental results, the processing route of the two steps with compound cold extrusion is more suitable than one cold extrusion for the production.

scholarly journals Numerical Simulation and Experimental Study on Rotary Cold Extrusion Forming of Screw Rod

2021 ◽  
Vol 2101 (1) ◽  
pp. 012017
Author(s):  
Peiai Li ◽  
Baoyu Wang ◽  
Jiapeng Wang
Keyword(s):  
Wall Thickness ◽  
Extrusion Process ◽  
Simulation Software ◽  
Cold Extrusion ◽  
Extrusion Force ◽  
Forming Process ◽  
Material Loss ◽  
Screw Pump ◽  
Plastic Forming ◽  
Extrusion Forming

Abstract The rotary cold extrusion forming process is a plastic forming process with very low material loss, especially in the production of hollow screw rods with equal wall thickness. In this work, the rotary cold extrusion forming process of a hollow T2 copper screw rod with a wall thickness of 4 mm and solid T2 copper screw rod was verified by experimental method. The finite element simulation software Deform-3D was also used to simulate the rotary cold extrusion forming process of the screw rod. The effects of the die with different heights of the working belt and the different wall thickness of the billet on the eccentricity, extrusion force, and forming torque in the forming process of the screw rod were studied. The results show that it is feasible to process hollow and solid T2 copper screw rods with equal wall thickness by rotary cold extrusion. With the increase of die working belt height, the eccentricity of the screw rod becomes smaller and closer to the ideal eccentricity. With the increase of the wall thickness of the billet, the amplitude fluctuation range of the eccentricity of the screw rod gradually decreases. The higher the height of the die working belt, the greater the extrusion force and torque required in the extrusion process, and the more intense the change of torque. These results also provide theoretical guidance for the production practice and lightweight transformation of the screw pump rotor.

Recycling of EN AW 2011 Aluminum Chips without Remelting

2019 ◽  
Author(s):  
Branimir Lela ◽  
Jure Krolo
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Aluminum Alloy ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Extrusion Temperature ◽  
Influential Factor ◽  
Depth Of Cut ◽  
Extrusion Force ◽  
Main Research

This article deals with the direct recycling of EN AW 2011 aluminum alloy chips, which are formed by turning, into semifinished products using forward hot extrusion process. Direct recycling without re-melting is usually called solid-state recycling. The main aim of this article is to investigate the influence of depth of cut (size of chips) in the aluminum alloy turning process, extrusion temperature, and compaction force on mechanical properties, surface roughness, and extrusion force of recycled samples. An original approach to solve this problem is mathematical modelling of the process using the design of experiments. The influence of main research factors on yield strength (Rp0,2), hardness (HV), extrusion force (F), and surface roughness (Ra) of recycled samples has been studied. The study has shown that the most influential factor on mechanical properties, surface roughness, and extrusion force was extrusion temperature.

Machinery and Equipment for Direct and Indirect Hot Extrusion

Extrusion ◽  
2006 ◽  
pp. 323-416
Author(s):  
Horst Groos
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Age Hardening ◽  
Auxiliary Equipment ◽  
Cooling Systems ◽  
Tube Extrusion ◽  
Design Requirements

Abstract The machinery and equipment required for rod and tube extrusion is determined by the specific extrusion process. This chapter provides a detailed description of the design requirements and principles of machinery and equipment for direct and indirect hot extrusion. It then covers the presses and auxiliary equipment for tube extrusion, induction furnaces for billet processing, handling systems for copper and aluminum alloy products, extrusion cooling systems, and age-hardening ovens. Next, the chapter describes the principles and applications of equipment for the production of aluminum and copper billets. Then, it focuses on process control in both direct and indirect hot extrusion of aluminum alloys without lubrication. The chapter describes the technology of electrical and electronic controls in the extrusion process. It ends with a discussion on the factors that influence the productivity and quality of the products in the extrusion process and methods for process optimization.

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