Elucidation of Mechanism Underlying Workpiece Jump in Hammer Forging

2021 ◽  
Vol 62 (721) ◽  
pp. 21-28
Author(s):  
Takayoshi NIHO ◽  
Keisuke NAGATO ◽  
Masayuki NAKAO ◽  
Toshiro OHTANI ◽  
Koji MIYOSHI ◽  
...  
Keyword(s):  
Hammer Forging

MAGNESIUM TA54A

Alloy Digest ◽  
1960 ◽  
Vol 9 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Magnesium Alloy ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
General Purpose ◽  
Aluminum Company ◽  
Hammer Forging

Abstract MAGNESIUM ALLOY-TA54A is a general purpose hammer-forging alloy having intermediate strength. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Mg-44. Producer or source: Aluminum Company of America.

scholarly journals Microstructural Characterization and Mechanical Properties of Ti-6Al-4V Alloy Subjected to Dynamic Plastic Deformation Achieved by Multipass Hammer Forging with Different Forging Temperatures

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Xiurong Fang ◽  
Jiang Wu ◽  
Xue Ou ◽  
Fuqiang Yang
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Volume Fraction ◽  
Microstructural Characterization ◽  
Optical Microscope ◽  
Strain Rates ◽  
Materials Properties ◽  
Forging Process ◽  
Hammer Forging ◽  
Dynamic Plastic Deformation

Dynamic plastic deformation (DPD) achieved by multipass hammer forging is one of the most important metal forming operations to create the excellent materials properties. By using the integrated approaches of optical microscope and scanning electron microscope, the forging temperature effects on the multipass hammer forging process and the forged properties of Ti-6Al-4V alloy were evaluated and the forging samples were controlled with a total height reduction of 50% by multipass strikes from 925°C to 1025°C. The results indicate that the forging temperature has a significant effect on morphology and the volume fraction of primary α phase, and the microstructural homogeneity is enhanced after multipass hammer forging. The alloy slip possibility and strain rates could be improved by multipass strikes, but the marginal efficiency decreases with the increased forging temperature. Besides, a forging process with an initial forging temperature a bit above β transformation and finishing the forging a little below the β transformation is suggested to balance the forging deformation resistance and forged mechanical properties.

The Force in a Die Forging Hammer

1983 ◽  
Vol 105 (4) ◽  
pp. 270-275 ◽  
Author(s):  
Hans W. Haller
Keyword(s):  
Plastic Deformation ◽  
Energy Balance ◽  
Kinetic Energy ◽  
Theoretical Prediction ◽  
Die Forging ◽  
Upper Limits ◽  
Hammer Forging

The blow of a die forging hammer in its nature and quantity is influenced by the behavior of the forging and its deformation status. In forging, the hammer supplies the energy necessary for plastic deformation as well as the force necessary to coin the forging. The main purpose of this paper is to determine, in hammer forging, how the forces are generated and how the hammer energy is transformed into energies (a) useful for deformation and (b) lost in vibration and noise. Theoretical prediction of the forces is possible by considering the energy balance between the kinetic energy of the ram and the energies used for deformation and lost in rebounding of the ram and the acceleration of the anvil. The results given in this paper show that it is possible to predict at least the upper limits of the generated forces for a given size of an anvil hammer.

Analysis of a new process of forging a 2017A aluminium alloy connecting rod

2021 ◽  
pp. 1-32
Author(s):  
Grzegorz Winiarski ◽  
Anna Dziubinska
Keyword(s):  
Aluminium Alloy ◽  
The Finite Element Method ◽  
Connecting Rod ◽  
Sand Cast ◽  
Input Material ◽  
Lower Strain ◽  
New Process ◽  
Billet Material ◽  
Hammer Forging ◽  
Deform 3D

Abstract The paper presents the results of a theoretical analysis of a new process of hammer forging of a connecting rod and the technology currently used. In the industry at present connecting rods are forged from extruded rods. The new forging technology assumes the use of a billet in the form of a cast preform. For the calculations, it has been assumed that the billet material will be a Ø30 x 148 mm rod and a cast preform. Two variants of preforms have been modelled, from which products of the assumed geometry with different degree of strain are obtained. Calculations were made using the finite element method in the Deform 3D program. The input material was 2017A aluminium alloy in the form of rods and sand cast preforms. On the basis of the conducted research it was found that the use of cast preforms reduces material waste by about 80% in relation to the technology of forging from the bar, and reduces the energy consumption of the process by about 75%. Both geometrical variants of the forging preforms ensure obtaining a forging with the assumed shape and dimensions, although forging from the forging preform with a smaller degree of strain seems to be a safer variant in terms of the possibility of cracking of the material. This is supported by the lower strain and Cockcroft-Latham integral values.

Huge Forging Equipment Hydraulic System Dynamic Analysis

2012 ◽  
Vol 619 ◽  
pp. 459-462 ◽  
Author(s):  
Miao Xie ◽  
Jun Meng ◽  
Wen Xin Xu ◽  
Rong Bao Dong ◽  
Jian Liang Wang
Keyword(s):  
Hydraulic System ◽  
Simulation Models ◽  
Simulation Software ◽  
Hydraulic Systems ◽  
System Pressure ◽  
Hydraulic Hammer ◽  
Hammer Head ◽  
Working Principle ◽  
Switching Characteristics ◽  
Hammer Forging

In order to optimize the dynamic characteristic of hydraulic system of large forging equipment. It based on the model of one company of a certain aero-engine hydraulic system of hydraulic hammer forging, analysis the composition and working principle of hydraulic systems. Using simulation software AMESim, simulate the model of hydraulic systems and by changing the system pressure, flow and effect of the hammer-head stroke to explore this kind of switching characteristics of forging equipment’s hydraulic system. The result shows that this kind of simulation models can reflect the working status of hydraulic hammer well, and provide a technical reference for analysis and tuning equipment that with similar to forging equipment.

scholarly journals New Technologies for Producing Bicycle Hub Forging

2018 ◽  
Vol 220 ◽  
pp. 02003 ◽  
Author(s):  
Andrzej Gontarz ◽  
Anna Dziubiñska ◽  
Grzegorz Winiarski ◽  
Arkadiusz Tofil
Keyword(s):  
Energy Consumption ◽  
New Technologies ◽  
The Other ◽  
Considerable Decrease ◽  
Manufacturing Costs ◽  
Forging Process ◽  
Tube Billet ◽  
Potential Benefits ◽  
Forging Press ◽  
Hammer Forging

The paper presents the results of research on two new forging processes for producing bicycle hub forgings in a three-slide forging press. The first process is related to producing a forging with an axial cavity by flashless forging. The other one concerns the production of a forging from a tube billet. The potential benefits offered by these two new forging processes compared to the conventional hammer forging method for producing hubs are discussed. The designed processes are verified theoretically via numerical simulations. The first of the proposed processes is also subjected to experimental verification. The results demonstrate that the new technologies allow obtaining good quality products. A comparison is made between material and energy consumption in the two analyzed processes and in conventional hammer forging. It is found that the application of the forging process in a three-slide forging press leads to a considerable decrease in manufacturing costs.

scholarly journals A new tailored solution to predict blow efficiency and energy consumption of hammer-forging machines

2020 ◽  
Vol 111 (7-8) ◽  
pp. 1941-1954 ◽  
Author(s):  
Jean-François Mull ◽  
Camille Durand ◽  
Cyrille Baudouin ◽  
Régis Bigot
Keyword(s):  
Energy Consumption ◽  
Hammer Forging

Investigation of the Hammer Forging Process of Large-Sized Turbine Blades of Stainless Steel

2019 ◽  
Vol 822 ◽  
pp. 150-158 ◽  
Author(s):  
Maksim Olegovich Smirnov ◽  
Tatiana Alexandrovna Chizhik ◽  
Alexandr Maksimovich Zolotov
Keyword(s):  
Stainless Steel ◽  
Turbine Blades ◽  
Process Data ◽  
Influence Of Process Parameters ◽  
Forging Process ◽  
Forming Temperature ◽  
Experimental Process ◽  
Deformation Modes ◽  
Hammer Forging ◽  
Deform 3D

Investigations of the rheological properties and the formation of the structure of stainless steel were performed. A computer model of the process of hammer forging of the turbine blades made of stainless steel 1.3 m long in the package Deform-3D was developed , with the help of which the necessary coefficients and parameters are determined to ensure maximum convergence of the calculated and experimental process data. The obtained data were used to create a mathematical model for stamping a large-sized turbine blade made of stainless steel with a length of 2.1 m. Mathematical modeling of the processes of stamping and distorting of a large-sized blade in the software package Deform-3D has been performed. The influence of process parameters on the stress-strain state (SSS), forming, temperature field in the forging at various stages of stamping. Determined temperature and deformation modes of stamping, the need for additional heating and optimal forgings geometry by stamping.

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