scholarly journals Biomimetic Soft Polymer Microstructures and Piezoresistive Graphene MEMS Sensors Using Sacrificial Metal 3D Printing

2021 ◽  
Author(s):  
Amar M. Kamat ◽  
Yutao Pei ◽  
Bayu Jayawardhana ◽  
Ajay Giri Prakash Kottapalli
Keyword(s):  
3D Printing ◽  
Mems Sensors ◽  
Polymer Microstructures ◽  
Metal 3D Printing ◽  
Soft Polymer

scholarly journals Metal casting or metal 3D printing

2019 ◽  
Author(s):  
A.A. Polienko ◽  
O.G. Tikhomirova
Keyword(s):  
3D Printing ◽  
Metal Casting ◽  
Metal 3D Printing

Process Monitoring of 3D Metal Printing in Industrial Scale

2018 ◽  
Author(s):  
Mohammadhossein Amini ◽  
Shing Chang
Keyword(s):  
3D Printing ◽  
Process Monitoring ◽  
Numerical Study ◽  
High Reliability ◽  
Factors Affecting ◽  
Main Metal ◽  
Metal Printing ◽  
Metal 3D Printing ◽  
Using Data

Metal 3D printing is one of the fastest growing additive manufacturing (AM) technologies in recent years. Despite the improvements and capabilities, reliable metal printing is still not well understood. One of the barriers of industrialization of metal AM is process monitoring and quality assurance of the printed product. These barriers are especially much highlighted in aerospace and medical device manufacturing industries where the high reliability and quality is needed. Selective Laser Melting (SLM) is one of the main metal 3D printing methods where it is known that more than 50 parameters are affecting the quality of the print. However, the current SLM printing process barely utilize a fraction of the collected data during production. Up to this point, no study to the best of our knowledge examines the correlation of factors affecting the quality of the print. After reviewing the current state of the art of process monitoring for metal AM involving SLM, we propose a method to control the process of the print in each layer and prevent the defects using data-driven techniques. A numerical study using simulated numbers is provided to demonstrate how the proposed method can be implemented.

Hybrid Metal 3D Printing for Selective Polished Surface

2021 ◽  
Vol 1027 ◽  
pp. 136-140
Author(s):  
Sze Yi Mak ◽  
Kwong Leong Tam ◽  
Ching Hang Bob Yung ◽  
Wing Fung Edmond Yau
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Surface Finishing ◽  
Polished Surface ◽  
Post Processing ◽  
One Stop ◽  
Metal 3D Printing ◽  
Critical Challenge ◽  
Metal Additive

Metal additive manufacturing has found broad applications in diverse disciplines. Post processing to homogenize and improve surface finishing remains a critical challenge to additive manufacturing. We propose a novel one-stop solution of adopting hybrid metal 3D printing to streamlining the additive manufacturing workflow as well as to improve surface roughness quality of selective interior surface of the printed parts. This work has great potential in medical and aerospace industries where complicated and high-precision additive manufacturing is anticipated.

What Is Design for Additive Manufacturing (DfAM)?

2020 ◽  
pp. 164-186
Author(s):  
Seung Hwan Joo ◽  
Sung Mo Lee ◽  
Jin Ho Yoo ◽  
Hyeon Jin Son ◽  
Seung Ho Lee
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Design Optimization ◽  
Advanced Manufacturing ◽  
Design For Additive Manufacturing ◽  
Printing Technology ◽  
Actual Production ◽  
Manufacturing Design ◽  
Metal 3D Printing ◽  
Is Design

In order to use 3D printing technology as a sanction, it is necessary to optimize topology, component unification, and reduce weight need for advanced manufacturing design. In the case of metal 3D printing, it is necessary to manage deformation and defects in the process cause of using laser, and support generation and design optimization must be accompanied for efficiency. Currently, design progresses through simulation before actual production in AM field. This chapter explores design in additive manufacturing.

A Method for Creating a Manufacturing Cost Heatmap Based Purely on Part Geometry

2018 ◽  
Author(s):  
Kelly A. Fox ◽  
Brandon Massoni ◽  
Matthew I. Campbell
Keyword(s):  
3D Printing ◽  
High Impact ◽  
Von Mises Stress ◽  
Manufacturing Cost ◽  
Cost Models ◽  
Part Geometry ◽  
Computer Aided ◽  
Solid Part ◽  
Metal 3D Printing ◽  
Von Mises

It is now common for computer-aided engineering tools to show a performance parameter — like von Mises stress — over the surface of a solid part. In this paper, a heatmap is generated for part cost where high values (shown in red) indicate regions with a high impact on manufacturing cost. This is accomplished by slicing the provided part many times in multiple orientations and evaluating the total costs of each side of the part at each slice. The costs from all the directions considered are combined to generate a heatmap to show how different regions affect cost, enabling the designer to make informed improvements to the part geometry. In this paper, our method for generating these heatmaps is presented with three primary manufacturing cost models: bar stock, forging, and metal 3D printing. In all cases, a machining operation is then applied to get to the final part shape. Results are shown to validate the approach and demonstrate its usefulness.

Design and Verification of a Metal 3D Printing Device Based on Contact Resistance Heating

2019 ◽  
Vol 298 ◽  
pp. 64-68
Author(s):  
Yu Hua Dai ◽  
Xi Wang
Keyword(s):  
3D Printing ◽  
Contact Resistance ◽  
Fused Deposition Modeling ◽  
Numerical Control ◽  
Control Technique ◽  
Resistance Heating ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Fused Deposition ◽  
Metal 3D Printing

As a branch of 3D printing technology, metal 3D printing is an important advanced manufacturing processing method. Metal 3D printing technology has been widely applied in a variety of areas, including the aerospace field, biomedical research and mold manufacturing. This paper proposed a new method for melting metal wires via contact resistance heating. Through the combination of a numerical control technique, a mechanical structure and computer software, a metal 3D printing device was designed based on the principle of fused deposition modeling. The printing nozzle of the device can be heated to over 1400°C in a few minutes. Additionally, we performed experiments with aluminum wire to demonstrate the feasibility of the printing method. The designed consumer-level desktop metal 3D printer cost less than 1500 dollars to fabricate.

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