scholarly journals Ultrasonic Orbital Microforming—A New Possibility in the Forming of Microparts

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 889 ◽  
Author(s):  
Wojciech Presz
Keyword(s):  
Technological Process ◽  
3D Modeling ◽  
Rotational Speed ◽  
Metal Forming ◽  
Structural Changes ◽  
Ultrasonic Frequency ◽  
Metal Parts ◽  
Orbital Forming ◽  
Preliminary Research ◽  
Orbital Forging

The demand for very small metal parts is growing rapidly due to the development of micromechanisms. In microtechnology, the dimensions of scale parts are below 1 + c mm, where c varies based on the process type. The “classic” processes usually cannot be simply scaled down, and tools require thorough structural changes. Microforming has been isolated from the area of “classic” metal forming and is governed by modified laws. The proposed new technological process ultrasonic orbital microforming (UOM) and its related phenomena are possible only on a microscale. UOM is a process that uses the broadly understood idea of orbital forging, which involves rolling on a closed road. This, however, is where the analogy ends. The UOM process uses completely different laws of physics. The process, the result of which is the axial-symmetrical micropart, consists of inducing a fast rotational movement of the billet by a punch that is vibrating at an ultrasonic frequency. The rotational speed is so fast that gyroscopic effect plays an important role. This work presents the concept of the process, preliminary research results, and their general interpretation. FEM-3d modeling of micro-orbital forming processes in geometrically similar conditions to the UOM process was also performed, obtaining shapes consistent with those obtained in the UOM.

scholarly journals 3D-Modeling and Motion Simulation of Composite Wheel Gears Transmission Based on UG

2018 ◽  
Vol 175 ◽  
pp. 03006
Author(s):  
Mingxia Zhao
Keyword(s):  
3D Modeling ◽  
Rotational Speed ◽  
Spur Gear ◽  
Transmission Mechanism ◽  
Gear Train ◽  
Gear Pair ◽  
Calculation Formula ◽  
Motion Simulation ◽  
Gear Trains ◽  
Simulation Parameters

Taking the compound gear trains as an example, the principle of the transmission mechanism was analyzed, and the rotational speed of the key gears in the compound gear trains was calculated by using the calculation formula of transmission ratio to obtain the simulation parameters of UG movement. The gear tool box in UG was applied to complete the modeling and meshing assembly of the bevel gear and spur gear, the rotation pair and gear pair was to motion simulation, the gear transmission state could have visually observed by motion simulation, and then the chart was analyzed to verify the design rationality of the gear train.

Dry Shearing of Micro-Alloyed Steels

2014 ◽  
Vol 622-623 ◽  
pp. 1058-1065
Author(s):  
Frank Steinbach ◽  
Alper Güner ◽  
A. Erman Tekkaya
Keyword(s):  
Sheet Metal ◽  
Metal Forming ◽  
Testing Machine ◽  
Testing Device ◽  
Tensile Testing Machine ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Cut Edge ◽  
Future Production ◽  
Small Device

In the production process of sheet metal parts, oil is widely used as lubricant, not only in sheet metal forming but also in shearing and blanking. Due to environment, health and cost reasons, the absence of lubricants is an aim for future production as it has initiated for machining in the last years. For lubricant-free shearing, it has to be known if there is an influence on the process itself when using oil or not. To find this out, experiments are carried out with a small testing device installed in a tensile testing machine and a blanking tool installed in a servo press. With the small device it is possible to make a piercing process with a circle punch of 16 mm diameter. The blanking tool produces a larger cut part with different holes and open cuts. Without lubricant, there is no difference in the maximum shearing force for the small device while the stripping force is higher and the cut edge zones differs slightly. Using oil or not has a small effect on the force using the blanking tool.

Distortion Analysis of Aluminum Alloy for Sheet Metal Forming after Solution Treatment

2007 ◽  
Vol 561-565 ◽  
pp. 893-896 ◽  
Author(s):  
Chau Chen Torng ◽  
Chi Kong Huang ◽  
Hsien Ming Chang
Keyword(s):  
Aluminum Alloy ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Solution Treatment ◽  
Value Added ◽  
Effect Analysis ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Distortion Analysis

The sheet metal parts play important role in aero structures. Due to the requirement of strength and constraint of weight in aircraft, the aluminum alloy is widely used in sheet metal forming parts. Most of sheet metal parts form the contour in O-condition, and then solution treat to improve the strength and mechanical property. The deformation of sheet metal parts usually takes place after the heating cycle and quenching into the water or solution. The straightening operation will apply to corrective the contour of parts. Thus, the non-value added operation would increase the production cost. By using statistical methodology to analysis deformation data of sheet metal parts, this study use Cause-Effect Analysis to find the relation between deformation and relative factors, such as material, thickness and contour. The results of this analysis can provide an efficient and economical approach for the designer, process planner, and technician in manufacturing the sheet metal parts.

The Control System for Metal Forming Based on Computer Aided Design

2014 ◽  
Vol 536-537 ◽  
pp. 1207-1210
Author(s):  
Zhu Wang ◽  
Miao Miao Liu
Keyword(s):  
Control System ◽  
Process Control ◽  
Code Generation ◽  
Metal Forming ◽  
Computer Aided Design ◽  
Data Stream ◽  
Control Process ◽  
Forming Process ◽  
Metal Parts ◽  
Aided Design

This paper presents the design of control system of direct metal deposition forming software. The system which is designed by VC++ software employs the ideas of object-oriented and data stream. The metal parts are abstracted into objects and classes to realize the reusability and scalability. The software control system has realized from the machine initialization, digital control code generation, forming process control, process parameter management module. The control system can improve the forming quality and achieve the best forming process control, saving the metal parts of the development time and cost of development.

scholarly journals Robustness - Practice Report: Make Forming Processes more Stable

2018 ◽  
Vol 918 ◽  
pp. 95-102
Author(s):  
Kai Kittner ◽  
Bernd Stimper
Keyword(s):  
Stochastic Simulation ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Industry 4.0 ◽  
Planning Process ◽  
High Quality ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Evolution Stage

In the last years, the development of sheet metal forming technologies shows many different tendencies such as materials or geometries. In the same duration the process planning for stamping processes keep still in the same way, although numerical algorithm and hardware improved continuously. That means, as components, processes and materials got more complex, the planning process still stays in the same technical evolution stage as years before. At present it is mostly a deterministic kind of planning. And in this way, potentials and possibilities still lie down. In the actual discussion around industry 4.0 new potentials around this topic seems to show new ways, but a lot of data and technologies are already available to improve production and forming processes. The task is to use this data. The key to improve the processes based on this data is the stochastic simulation, especially in the sheet metal forming industry [1,2]. The eberspaecher company as customer for sheet metal parts has an immense interest in high quality parts. High quality parts are an important step to reduce cost in the own following manufacturing. This paper deals with actions to integrate stochastic considerations into the planning process at eberspaecher. And its content should excite the discussion around robustness processes, stochastic simulation and in this way industry 4.0 as one base for future manufacturing.

scholarly journals Endoplasmic reticulum remains continuous and undergoes sheet-to-tubule transformation during cell division in mammalian cells

2007 ◽  
Vol 179 (5) ◽  
pp. 895-909 ◽  
Author(s):  
Maija Puhka ◽  
Helena Vihinen ◽  
Merja Joensuu ◽  
Eija Jokitalo
Keyword(s):  
Endoplasmic Reticulum ◽  
Cell Division ◽  
3D Modeling ◽  
Mammalian Cells ◽  
Structural Changes ◽  
Electron Tomography ◽  
Morphological Changes ◽  
Homogenous Distribution ◽  
Membrane Bound ◽  
Cycle Dependent

The endoplasmic reticulum (ER) is a multifaceted cellular organelle both structurally and functionally, and its cell cycle–dependent morphological changes are poorly understood. Our quantitative confocal and EM analyses show that the ER undergoes dramatic reorganization during cell division in cultured mammalian cells as mitotic ER profiles become shorter and more branched. 3D modeling by electron tomography reveals that the abundant interphase structures, sheets, are lost and subsequently transform into a branched tubular network that remains continuous. This is confirmed by observing the most prominent ER subdomain, the nuclear envelope (NE). A NE marker protein spreads to the mitotic ER tubules, although it does not show a homogenous distribution within the network. We mimicked the mitotic ER reorganization using puromycin to strip the membrane-bound ribosomes from the interphase ER corresponding to the observed loss of ribosomes normally occurring during mitosis. We propose that the structural changes in mitotic ER are linked to ribosomal action on the ER membranes.

scholarly journals Application of Ground-based 3D Laser Scanning Technology in Engineering Surveying

2021 ◽  
Vol 236 ◽  
pp. 05033
Author(s):  
Xue Ting ◽  
Li Ting ◽  
Ni Jiahui
Keyword(s):  
Technological Process ◽  
3D Modeling ◽  
Laser Scanning ◽  
3D Laser Scanning ◽  
Topographic Map ◽  
Advantages And Disadvantages ◽  
Engineering Survey ◽  
Application Methods ◽  
Urban Engineering ◽  
Surveying And Mapping

In this paper, the technological process of fixed ground-based 3D laser scanning technology in practical production of engineering survey is introduced, and application methods of the technology in topographic map surveying and mapping, earthwork calculation, road surveying, 3D modeling and other aspects are systematically discussed. Meanwhile, the paper summarizes the advantages and disadvantages of this technology compared with traditional surveying and mapping methods, discusses the application direction and prospect of ground-based 3D laser scanning technology in the future11, and provide a reference for the application of this technology in urban engineering surveying.

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