Influences of Key Forging Parameters on Cold Orbital Forging of Thin Parts with High Circular Ribs

2021 ◽  
pp. 1099-1105
Author(s):  
Wuhao Zhuang ◽  
Xinghui Han ◽  
Lin Hua ◽  
Wei Feng
Keyword(s):  
Orbital Forging

scholarly journals Material Flow in Ultrasonic Orbital Microforming

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 475 ◽  
Author(s):  
Wojciech Presz
Keyword(s):  
Sheet Metal ◽  
Material Flow ◽  
Middle Part ◽  
Microstructure Analysis ◽  
Inertia Force ◽  
Hardness Distribution ◽  
Micro Hardness ◽  
Rolled Aluminum ◽  
Cold Rolled ◽  
Orbital Forging

Ultrasonic orbital microforming—UOM—uses the broadly understood idea of orbital forging but uses very different laws of physics. The only shaping force in this process is the inertia force resulting from the acceleration in the rotary motion of the workpiece. Micro specimen blanked from cold rolled aluminum sheet metal was used in the applied UOM process. Only the upper and lower part of the sample is deformed that gives about 70% of volume. The rest—the middle part—remains undeformed. The final shape of the product is influenced by the shape of the inside of the die in which the UMO process is carried out. However, this effect is not a direct one. The product shape does not repeat the shape of the interior of the die. The preliminary experiments with modular micro-die have been performed on the way of controlling the shape of deformed micro-objects. The microstructure analysis has been done as well as micro-hardness distribution.

Orbital Forging of Sintered Porous Billets

2015 ◽  
Vol 53 (9-10) ◽  
pp. 522-528 ◽  
Author(s):  
G. A. Baglyuk ◽  
V. G. Kurikhin ◽  
S. P. Gozhii
Keyword(s):  
Orbital Forging

Recent development in orbital forging technology

2008 ◽  
Vol 1 (S1) ◽  
pp. 387-390 ◽  
Author(s):  
J. Nowak ◽  
L. Madej ◽  
S. Ziolkiewicz ◽  
A. Plewinski ◽  
F. Grosman ◽  
...  
Keyword(s):  
Orbital Forging

Orbital Forging of a Ti6Al4V Alloy Jaw Coupling Sleeve

2014 ◽  
Vol 622-623 ◽  
pp. 1228-1234
Author(s):  
Grzegorz Samołyk
Keyword(s):  
Titanium Alloy ◽  
Numerical Investigation ◽  
Fem Simulation ◽  
Final Part ◽  
Optimal Conditions ◽  
Agricultural Industry ◽  
Forging Process ◽  
Hollow Part ◽  
Preform Shape ◽  
Orbital Forging

The paper presents selected results of a numerical investigation of the orbital forging process for producing a hollow part. This part is a jaw coupling sleeve made of titanium alloy, widely used in the agricultural industry. The FEM simulation was performed based on the following assumptions: (i) the orbital forging process is conducted under hot conditions using an industrial press of MCOF type and (ii) the final part is formed from a special hollow preform. The preform shape was selected such to ensure optimal conditions of the orbital forging process. The aim of the investigation was to identify phenomena which occur during the orbital forging process. The results obtained are thoroughly examined and described.

A Novel Cold Rotary Forging Method of Producing Multiple Racks Using One Set of Punch

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Xinghui Han ◽  
Yaxiong Hu ◽  
Lin Hua
Keyword(s):  
Finite Element ◽  
Mathematical Models ◽  
Transmission Ratio ◽  
Rotary Forging ◽  
The Third ◽  
Variable Transmission ◽  
Gear Rack ◽  
Cold Rotary Forging ◽  
Experimental Researches ◽  
Orbital Forging

When producing racks by cold rotary forging, the top punch and the rack teeth definitely intervene and thus the top punch has to be amended, which makes the technical designing processes difficult and complex (Han et al., 2016, “Cold Orbital Forging of Gear Rack,” Int. J. Mech. Sci., 117(10), pp. 227–242). In this study, a novel cold rotary forging method of producing racks is put forward to avoid the interventions between the top punch and the racks. Thus, the top punch need not be amended and the technical designing processes correspondingly become simple. In light of this presented method, a novel idea for cold rotary forging of producing multiple racks using one set of punch is motivated. The concrete researches are as follows: First, the mathematical models are developed and three kinds of key forging conditions in cold rotary forging of racks are calculated to avoid the interventions between the top punch and the racks. The first one is the condition that the top punch and the rack teeth do not intervene. The second one is the condition that the top punch and cylindrical surfaces of racks do not intervene. The third one is the condition that the top punch can be successfully constructed. On the basis of these three kinds of key forging conditions, the workpiece is optimized and the cold rotary forging processes of racks with constant and variable transmission ratio are examined using finite element (FE) simulations. The experimental researches are also conducted. The results show that for both racks with constant and variable transmission ratio, the obtained key forging conditions are effective and the presented cold rotary forging principles of producing multiple racks using one set of punch are feasible.

scholarly journals Static and Dynamic Analysis of a 6300 KN Cold Orbital Forging Machine

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 7
Author(s):  
Zhiqiang Gu ◽  
Mingzhang Chen ◽  
Chaoyang Wang ◽  
Wuhao Zhuang
Keyword(s):  
Fatigue Life ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Optimization Method ◽  
Vertical Vibration ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Low Frequency Vibration ◽  
Orbital Forging

In cold orbital forging (COF) processes, large stress, displacement and vertical vibration of the COF machine are bad for the quality of the part and the fatigue life of the COF machine. It is necessary to investigate the static and dynamic performance of the COF machine and provide methods for reducing the stress, displacement and vertical vibration of the COF machine. In this paper, finite element analysis, theoretical analysis, numerical simulation and experimental analysis were applied to study the static and dynamic performance of a 6300 KN COF machine. The static and dynamic analyses were verified effectively by carrying out strain and vertical vibration test experiments. In the static analysis, the large stress and displacement positions of the COF machine were mainly distributed near the working table and the junction between the working table and the column. Large stress and displacement will be bad for the quality of the part and the fatigue life of the COF machine. Structural optimizations of the COF machine include ribbed plates on the working table and beam. This structural optimization method of the COF machine obviously reduced the stress and displacement of the COF machine. When the angular velocities of the eccentric rings were 8π rad/s, the vertical vibration of the swing shaft is a low-frequency vibration. The existence of absorber obviously reduced the vertical vibration of the COF machine.

A New Punch Profile Design for Orbital Forging of a Bevel Gear Part

2009 ◽  
Vol 83-86 ◽  
pp. 113-124
Author(s):  
Jinn Jong Sheu ◽  
M.S. He
Keyword(s):  
Laser Scanner ◽  
Fem Simulation ◽  
Experimental Tests ◽  
Bevel Gear ◽  
Preform Design ◽  
Forming Process ◽  
Die Stress ◽  
Profile Design ◽  
Volume Constancy ◽  
Orbital Forging

The difficulty in forging of bevel gear with an outside diameter larger than 75mm is due to the high forming load requirement. In this paper, a new intuitive method for the punch and preform design of the bevel gear warm orbital forging is proposed to lower the forging load and improve the die filling. The geometry of the forged bevel gear are divided into characteristic features and mapped to the main dimensions of the preform design. The exact dimensions of the preform are determined utilizing constraints of the volume constancy and the section centroid balance. The surface of punch tip is designed using the section profile described by a Bezier curve with five control points which are related to the preform and the forged part geometry simultaneously. The forming process was analyzed via the FEM simulation. The die stress was also calculated to prevent die failure and improve tool life. A PXW-200 orbital forging press was adopted for the experimental tests of the proposed designs. The unfilled area at the teeth faces were examined via the laser scanner. The experimental results of the maximum unfilled distances were varied from 0.3 mm to 0.8mm depending on the different punch tip profile design. The predicted tooth profiles were in good agreement with the experimental measurements.

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