Research on Warm-Cold Precision Forging Process and Numerical Simulation for Spherical Housing

2011 ◽  
Vol 189-193 ◽  
pp. 2780-2783
Author(s):  
Qian Li ◽  
Zhi Jiang ◽  
Xiao Hui Ma ◽  
Hong Yan Yan ◽  
Zhi Ping Zhong ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Material Flow ◽  
Extrusion Process ◽  
Mold Design ◽  
Forming Process ◽  
Load Curve ◽  
Flow Temperature ◽  
Cold Forming ◽  
Precision Forging ◽  
Cold Precision Forging

The warm-cold forming process is researched for complex-DOJ-type spherical housing by means of numerical simulation. Each step of the process is simulated, especially for the reverse extrusion process. Focusing on analysis of the material flow, temperature distribution as well as the load curve, a reasonable process for DOJ-type spherical housing is obtained. The reasonable forming process for DOJ-typed spherical housing offers favorable basis for forming and mold design.

Study on the Large Module Spur Gear Cold Forming Process by Means of Numerical Simulation

2011 ◽  
Vol 189-193 ◽  
pp. 2642-2646 ◽  
Author(s):  
Qian Li ◽  
Yi Bian ◽  
Zhi Ping Zhong ◽  
Gui Hua Liu ◽  
Ying Chen
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Spur Gear ◽  
Cold Forging ◽  
Forming Process ◽  
Cold Forming ◽  
Forging Process ◽  
Flow Method ◽  
Precision Forging ◽  
Cold Precision Forging

The cold forging process of large module spur gear with four modules and 59mm breadth is performed by means of numerical simulation method. Two processes to forming such spur gears were compared by the simulation method, one is with the closed-die performing and extrusion in the finish-forging, the other is with divided-flow method in the finish-forging. Especially, the divided-flow method is analyzed in detail. The necessary reference and basis to realize practical cold precision forging process of spur gear with large modulus is provided eventually.

Study on Cold Precision Forging of Non Straight Wall Cavity Piston

2011 ◽  
Vol 311-313 ◽  
pp. 2348-2352
Author(s):  
Ming Ming Ding ◽  
Ju Chen Xia ◽  
Lei Deng ◽  
Jun Song Jin
Keyword(s):  
Element Model ◽  
Cold Extrusion ◽  
Forming Process ◽  
Rigid Plastic ◽  
Precision Forging ◽  
Straight Wall ◽  
Cold Precision Forging ◽  
Overall Performance ◽  
Traditional Processing ◽  
Machine Processing

Brake piston is a huge demand non straight wall cavity part for the typical automotive industry; the traditional processing method is machine processing, or preforming by cold extrusion, and then machining. In this paper, the combined cold precision forging method of cold extrusion and spinning was proposed, which might improve the overall performance of parts and reduce costs. The rigid plastic finite element model of cold extrusion and spinning was established to simulate the forming process. The results showed that the combined cold precision forging method was available to manufacture non-straight wall cavity piston.

Research of Characteristic of Wrinkling in Cold Forming Process for Ship Frame Part Based on Numerical Simulation

2015 ◽  
Author(s):  
Pei-Yong Li ◽  
◽  
Jun-jie Song ◽  
Cheng-fang Wang ◽  
Yun-sheng Mao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Forming Process ◽  
Cold Forming

Numerical and Experimental Studies on Extrusion of Fan-Shaped Shell of Magnesium Alloy

2012 ◽  
Vol 626 ◽  
pp. 381-385
Author(s):  
Bao Hong Zhang ◽  
Yao Jin Wu ◽  
Zhi Min Zhang
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Experimental Studies ◽  
Extrusion Process ◽  
Base Thickness ◽  
Forming Process ◽  
Backward Extrusion ◽  
Minimal Base ◽  
Billet Shape

This paper presents a case study of optimizing the forming process for a fan-shaped shell component. Numerical simulation was used to study the backward extrusion process of a fan-shaped shell. The underfill defect produced at the opening of the extruded shell due to the billet shape was solved and the minimal base thickness required to avoid the presence of the underfill defect at the bottom corner of the component was defined through the numerical simulation. The extrusion drawing and forming process of the fan-shaped shell were designed on the basis of the results of the numerical simulation. Forming experiments had been performed on the fan-shaped shell at 380 °C and cracking was found on the outside wall in the center of the extruded shell. Choked groove on the inner wall of the die and reducing the lubrication had been used to avoid the presence of cracking. The fan-shaped shell of AZ31 magnesium alloy has been successfully formed by the three-stage forming process of hot upsetting, hot backward extrusion and cold sizing.

Numerical Simulation of the Extrusion Process with Feeder Plate Die

2014 ◽  
Vol 926-930 ◽  
pp. 3521-3526
Author(s):  
Tian Xiao Chen ◽  
Chun Mei Li ◽  
Nan Pu Cheng ◽  
Hui Na Jia
Keyword(s):  
Numerical Simulation ◽  
Material Flow ◽  
Strain Distribution ◽  
Extrusion Process ◽  
Geometric Parameters ◽  
Geometrical Parameters ◽  
Direct Extrusion ◽  
Axial Hole ◽  
Hole Defect ◽  
Simulation Results

The direct extrusion process by using a newly designed die with different angle and feeder plate numbers has been simulated to systematically investigate the effects of different geometric parameters angle and feeder plate number on the strain distribution, the load and the axial hole defect. The simulation results show that the extrusion process with multiple feeder plate die is similar to that of the extrusion for many times. The angle and feeder plate make the material flow more fluently and ameliorate the axial hole defect. The larger angle reduces the load while the feeder plate increases it. Suitable geometrical parameters can significantly enhance strain in workpiece.

Influence Study on Drawbead Setting to Formability of Automobile Sump Based on Numerical Simulation

2010 ◽  
Vol 146-147 ◽  
pp. 883-886
Author(s):  
Hong Wei Wang ◽  
Er Wei Su ◽  
Feng Wang
Keyword(s):  
Numerical Simulation ◽  
Significant Influence ◽  
Line Segment ◽  
Thickness Variation ◽  
Mold Design ◽  
Forming Process ◽  
Forming Quality ◽  
Setting Theory ◽  
Separate Line ◽  
Shallow Part

Drawbead is an important factor to automobile sump forming process, proper drawbead setting can improve the forming quality significantly, such as uniforming the sump thickness. Using the drawbead setting theory in dynaform software, the drawbead on the compressive annular part which lie in the shallow part of sump was set, that is, three separate line segment shape equivalent drawbead were arranged alone the shallow part of the die. The influence law of different drawbead parameters to the sump thickness variation has been simulated. Simulating results show that after setting drawbead, reduction of sump thickness is reduced 15% relative to not setting one, and drawbead setting has significant influence to the sump forming quality. It is helpful for forming mold design.

Recent Developments in the Manufacture of Complex Components by Influencing the Material Flow during Extrusion

2008 ◽  
Vol 367 ◽  
pp. 55-62 ◽  
Author(s):  
Nooman Ben Khalifa ◽  
Dirk Becker ◽  
Marco Schikorra ◽  
A. Erman Tekkaya
Keyword(s):  
Material Flow ◽  
Extrusion Process ◽  
The Other ◽  
Manufacturing Processes ◽  
Fluid Machinery ◽  
Forming Process ◽  
Recent Developments ◽  
Influencing Parameters ◽  
The One ◽  
Screw Rotors

New innovative direct extrusion process variants, curved profile extrusion (CPE), twisted profile extrusion (TPE), and hollow profile extrusion (HPE), which increase the flexibility of aluminum profile manufacturing processes, are presented in this paper. These processes are characterized by influencing the material flow inside the die so that the forming process is completed when exiting the die. On the one hand, three-dimensionally curved profiles are produced and analyzed by CPE regarding the accuracy, the influencing parameters, and the compensation strategies. On the other hand, TPE and HPE make it possible to manufacture helical profiles usable, for example, as screw rotors in fluid machinery.

Deform Based 1Cr18Ni9Ti Pipe Joint Upsetting Extrusion Process Finite Element Numerical Simulation Analysis

2013 ◽  
Vol 365-366 ◽  
pp. 1128-1131
Author(s):  
Zhi Yi Huo ◽  
Ying Zhi Li ◽  
Xiu Qian Sun ◽  
Qian Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Analysis ◽  
Extrusion Process ◽  
Forming Process ◽  
Element Analysis ◽  
Part Quality ◽  
Quantitative Basis ◽  
Extrusion Forming ◽  
Pipe Joint

Internal Defects are more likely to occur when 1Cr18Ni9Ti pipe joint are produced by traditional casting method or welding forming method, while the upsetting extrusion proposed in this essay can not only meet the part quality requirements, but also save material and shorten processing cycle. By numerical simulation analysis about part upsetting extrusion forming process with the finite element analysis method, we can obtain many index numerical values in part forming process, and therefore provide reliable quantitative basis for optimum design.

Microstructuring by a Combination of Micro Impact Extrusion and Shear Displacement Forming

2013 ◽  
Vol 554-557 ◽  
pp. 893-899 ◽  
Author(s):  
Andreas Schubert ◽  
Stephan F. Jahn ◽  
Benedikt Müller
Keyword(s):  
Cross Sections ◽  
Material Flow ◽  
Extrusion Process ◽  
Shear Displacement ◽  
Raw Material ◽  
Hybrid Process ◽  
Research Centre ◽  
Forming Process ◽  
Process Chains ◽  
Production Technologies

The Collaborative Research Centre SFB/TR 39 PT-PIESA is developing mass production technologies and process chains for the fabrication of aluminium piezo composites, which can be used as raw material for "smart sheet metal" [1]. Microstructuring by forming is a challenging task concerning material flow, tool and process design [2]. In this study, a hybrid forming process combined of micro impact extrusion and shear displacement is presented and discussed. The formed microstructure, depicted in figure 1, consists of ten parallel primary cavities with cross sections of 0.3×0.3 mm² and four larger secondary cavities which are surrounding the primary cavities. High demands are made concerning precision and reproducibility of the cavities' geometry according to the function of the cavities, which is to serve as collets for sensitive piezo rods. The microstructure has to be formed with one stroke of the stamp. Micro backward impact extrusion is chosen for structuring the primary cavities since it allows accurate forming without aligning die plate and stamp due to a flat die plate. Shear displacement forming, which is the selected process for the secondary cavities, requires a structured and aligned die plate but the forming forces are significantly lower than forming the same geometry with an extrusion process which in turn increases the accuracy. The investigations are focused on the characterization of samples formed with the hybrid process in comparison to structures which are formed solely by impact extrusion. Geometric parameters, material flow and process parameters were evaluated to assess the hybrid process. First experiments show promising results, whereas higher degrees of deformation could be reached at lower forming forces. Exemplary, sections for both processes are depicted in figure 2.

Numerical Simulation for Cold Extrusion of Bevel Gear

2012 ◽  
Vol 497 ◽  
pp. 356-364
Author(s):  
Qing Hua Yang ◽  
Jun Pan ◽  
Jun Xiong Zhang ◽  
Wen Biao Chen ◽  
Bin Meng
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Bevel Gear ◽  
Basic Knowledge ◽  
Cold Extrusion ◽  
Forming Process ◽  
Load Curve ◽  
Extrusion Forming ◽  
3D Software ◽  
Deform 3D

A three-layers assembled cavity die and its technological measures were designed for cold extrusion forming for the bevel gear. Numerical simulation of the cold extrusion forming process was applied using Deform-3D software, load curve, velocity field, stress field and temperature field were analyzed, thus obtain the basic knowledge of the law of the bevel gear deformation. Subsequent targets for optimization were introduced, aiming to solve the remaining problems of the current cold extrusion forming. The accomplished work shows some significance in guiding how to design a die and its technological measures.

Sign in / Sign up

Export Citation Format

Share Document