An Automated Chemical Milling Process
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Vibrations in Metal Cutting Measurement, Analysis and Reduction
Vibrations in Metal Cutting Measurement, Analysis and Reduction Linus Pettersson Ronneby, March 2002 Department of Telecommunications and Signal Processing Blekinge Institute of Technology 372 25 Ronneby, Sweden c Linus Pettersson Licentiate Dissertation Series No. 01/02 ISSN 1650-2140 ISBN 91-7295-008-0 Published 2002 Printed by Kaserntryckeriet AB Karlskrona 2002 Sweden v Abstract Vibration and noise in metal cutting are ubiquitous problems in the workshop. The turning operation is one kind of metal cutting that exhibits vibration related problems. Today the industry aims at smaller tolerances in surface finish. Harder regulations in terms of the noise levels in the operator environment are also central. One step towards a solution to the noise and vibration problems is to investigate what kind of vibrations that are present in a turning operation. The vibrations in a boring operation have been put under scrutiny in the first part of this thesis. Analytical models have been compared with experimental results and the vibration pattern has been determined. The second part of the thesis deals with active vibration control in external turning operations. By embedding a piezo-ceramic actuator and an accelerometer into a tool holder it was possible to obtain a solution that can be fitted in a standard lathe. The control system consists of the active tool holder, a control system based on the filtered-X LMS algorithm and an amplifier designed for capacitive loads. The vibration level using this technique can be reduced by as much as 40 dB during an external turning operation. vii Preface The work presented in this licentiate thesis has been performed at the department of Telecommunications and Signal Processing at Blekinge Institute of Technology. -
Complex Multi-System Integration Problems Associated with Titanium Metalworking and Manufacture: System of Systems Aproach—Part I
metals Article Complex Multi-System Integration Problems Associated with Titanium Metalworking and Manufacture: System of Systems Aproach—Part I Adam Stroud 1 and Atila Ertas 2,* 1 Ellwood Texas Forge, Houston, TX 77045, USA; [email protected] 2 Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409, USA * Correspondence: [email protected]; Tel.: +1-(806)-834-57788 Received: 11 January 2019; Accepted: 26 March 2019; Published: 9 April 2019 Abstract: Titanium has an excellent combination of properties that make it an attractive material for use in aerospace applications. The one area in which titanium is not aligned with customer needs is affordability. Components made from titanium are many times more expensive than those manufactured from other alloys. The supply chain of an extruded product is no exception. A breakthrough in extrusion cost reduction would enable wider adoption of titanium in many structural member applications. In an effort to accomplish any breakthrough in titanium component costs, the entire supply chain for manufacturing should be evaluated simultaneously. Due to the complex interaction of the many facets of the systems in a manufacturing supply chain, it is inferred that the supply chain in its entirety must be the focus of the design activity in order to be successful. Design improvements on a single facet of manufacture may have little to no effect on the manufacture of the component. If the improvement has a detrimental impact on another system in the supply chain, overall performance may be lowered. The use of a system of systems’ (SoS) design approach was used due to its capability to address complex multi-system integration problems associated with titanium metalworking and manufacture. -
Mechanical Metalworking: from Manual to Computer-Based Processes
August 04, 2021 Mechanical metalworking: from manual to computer-based processes Just like in an ordinary kitchen, there is more to the steelmaker’s kitchen than just the processes where high temperature plays a crucial role, such as boiling, roasting or baking. Before a dish can be served, it needs additional work to make it more appealing. The same is true of metals. Prior to their use, plates, tubes, rods and complex steel castings are subject to cold forming by special metalworking machines and lathes, which become more and more sophisticated each year. History of mechanical metalworking Let’s look first into the history of mechanical metalworking and its origins. Unlike many other processes that are unique to steelmaking, some ideas related to the mechanical working of metal surfaces came from related areas. The ancient Egyptians had devices for drilling holes in stones. Wood machining equipment that later evolved into turning lathes existed in the sixth and seventh centuries BC. Yet these types of processes were not applied to metals for hundreds of years. For a long time, metal surface treatment had several restricting factors. First, it required harder tools. Second, small-batch production did not need high-precision metalworking. Third, the industrial revolution and mass production of uniform products only became a reality in the 18th-19th centuries. The third reason was a key prerequisite for the appearance of mechanical metalworking. Smiths that made goods for individual orders gave way to large industrial manufacturers and factories that had the capacity to produce large quantities of uniform metal goods. Gunsmiths were among the first to appreciate the importance of standardised metalworking. -
Fire Protection of Steel Structures: Examples of Applications
Fire protection of steel structures: examples of applications Autor(en): Brozzetti, Jacques / Pettersson, Ove / Law, Margaret Objekttyp: Article Zeitschrift: IABSE proceedings = Mémoires AIPC = IVBH Abhandlungen Band (Jahr): 7 (1983) Heft P-61: Fire protection of steel structures: examples of applications PDF erstellt am: 06.10.2021 Persistenter Link: http://doi.org/10.5169/seals-37489 Nutzungsbedingungen Die ETH-Bibliothek ist Anbieterin der digitalisierten Zeitschriften. Sie besitzt keine Urheberrechte an den Inhalten der Zeitschriften. Die Rechte liegen in der Regel bei den Herausgebern. Die auf der Plattform e-periodica veröffentlichten Dokumente stehen für nicht-kommerzielle Zwecke in Lehre und Forschung sowie für die private Nutzung frei zur Verfügung. Einzelne Dateien oder Ausdrucke aus diesem Angebot können zusammen mit diesen Nutzungsbedingungen und den korrekten Herkunftsbezeichnungen weitergegeben werden. Das Veröffentlichen von Bildern in Print- und Online-Publikationen ist nur mit vorheriger Genehmigung der Rechteinhaber erlaubt. Die systematische Speicherung von Teilen des elektronischen Angebots auf anderen Servern bedarf ebenfalls des schriftlichen Einverständnisses der Rechteinhaber. Haftungsausschluss Alle Angaben erfolgen ohne Gewähr für Vollständigkeit oder Richtigkeit. Es wird keine Haftung übernommen für Schäden durch die Verwendung von Informationen aus diesem Online-Angebot oder durch das Fehlen von Informationen. Dies gilt auch für Inhalte Dritter, die über dieses Angebot zugänglich sind. Ein Dienst der ETH-Bibliothek ETH Zürich, Rämistrasse 101, 8092 Zürich, Schweiz, www.library.ethz.ch http://www.e-periodica.ch J% IABSE periodica 2/1983 IABSE PROCEEDINGS P-61/83 69 Fire Protection of Steel Structures — Examples of Applications Protection contre le feu des structures acier — Quelques exemples d'applications Brandschutz der Stahlkonstruktionen — Einige Anwendungsbeispiele Jacques BROZZETTI Margaret LAW Dir., Dep. -
Materials Resources
Woods Sat 9am – 6pm, Sun 9am – 5pm (303) 290 – 0007 Austin Hardwoods Wood, tools, hardware, plans, books http://www.austinhardwoods.com/ 975 W. Mississippi Avenue Collector’s Specialty Woods Denver, CO 80223 http://www.cswoods.com/ M – F 7:30am – 5pm, Sat 7:30am – 1pm Warehouse and Showroom (303) 733 – 1292 4355 Monaco St. Unit A Denver, CO 80216 Wood stock and sheet, Molding, Veneer M – F 8am – 5pm (303) 355 - 0302 Frank Paxton Lumber Company Woodyard, Kiln Drying Facility, Woodshop, http://www.paxtonwood.com/ Showroom 4837 Jackson Street 8055 County Road 570 Denver, CO 80216 Gardner , CO 81040 Office 7:30am – 5pm, Warehouse 8am - 4:30pm Open by Appointment Only Woodcrafter’s Store M - F 8 am – 5pm, Sat 8am – 800 – 746 – 2413 12pm Lumber, Table tops (raw), thick wood, burl, (303) 399 – 6810, (303) 399 – 6047 matched wood, blocks, table bases Wood Stock and sheet Centennial Woods B&B Rare Woods http://www.centennialwoods.com/ http://www.wood-veneers.com/ Wyoming 871 Brickyard Circle Unit C4 (307) 760 – 8037, (307) 742 – 3672 Golden, CO 80403 Doors, flooring, furniture, siding M –F 9am – 4pm (303) 986 - 2585 Klingspor’s Woodworking Shop http://www.woodworkingshop.com/ Rockler Woodworking and Hardware North Carolina http://www.Rockler.com/ Tools, Hardware, Finishing Supplies 2553 S Colorado Blvd Ste 108 Denver, CO 80222 Lee Valley Tools M – F 9am – 7pm, Sat 9am – 6pm, http://www.leevalley.com Sun 11am – 4pm Canada (303) 782 – 0588 Woodworking, tools, gardening tools Limited wood stock, Woodworking tools, plans, finishing supplies, and hardware Metals Tool King, LLC Altitude Steel http://www.toolking.com/ http://www.altitudesteel.com/ th 11111 West 6 Avenue Unit D 1401 Umatilla St. -
A Comparison of Thixocasting and Rheocasting
A Comparison of Thixocasting and Rheocasting Stephen P. Midson The Midson Group, Inc. Denver, Colorado USA Andrew Jackson Arthur Jackson & Co., Ltd. Brighouse UK Abstract The first semi-solid casting process to be commercialized was thixocasting, where a pre-cast billet is re-heated to the semi-solid solid casting temperature. Advantages of thixocasting include the production of high quality components, while the main disadvantage is the higher cost associated with the production of the pre-cast billets. Commercial pressures have driven casters to examine a different approach to semi-solid casting, where the semi-solid slurry is generated directly from the liquid adjacent to a die casting machine. These processes are collectively referred to as rheocasting, and there are currently at least 15 rheocasting processes either in commercial production or under development around the world. This paper will describe technical aspects of both thixocasting and rheocasting, comparing the procedures used to generate the globular, semi-solid slurry. Two rheocasting processes will be examined in detail, one involved in the production of high integrity properties, while the other is focusing on reducing the porosity content of conventional die castings. Key Words Semi-solid casting, thixocasting, rheocasting, aluminum alloys 22 / 1 Introduction Semi-solid casting is a modified die casting process that reduces or eliminates the porosity present in most die castings [1] . Rather than using liquid metal as the feed material, semi-solid processing uses a higher viscosity feed material that is partially solid and partially liquid. The high viscosity of the semi-solid metal, along with the use of controlled die filling conditions, ensures that the semi-solid metal fills the die in a non-turbulent manner so that harmful gas porosity can be essentially eliminated. -
Introduction to Turning Tools and Their Application Identification and Application of Cutting Tools for Turning
Introduction to Turning Tools and their Application Identification and application of cutting tools for turning The variety of cutting tools available for modern CNC turning centers makes it imperative for machine operators to be familiar with different tool geometries and how they are applied to common turning processes. This course curriculum contains 16-hours of material for instructors to get their students ready to identify different types of turning tools and their uses. ©2016 MachiningCloud, Inc. All rights reserved. Table of Contents Introduction .................................................................................................................................... 2 Audience ..................................................................................................................................... 2 Purpose ....................................................................................................................................... 2 Lesson Objectives ........................................................................................................................ 2 Anatomy of a turning tool............................................................................................................... 3 Standard Inserts .............................................................................................................................. 3 ANSI Insert Designations ............................................................................................................. 3 Insert Materials -
Development of Non-Conventional Casting Processes
D 2014 DEVELOPMENT OF NON-CONVENTIONAL CASTING PROCESSES RUI JORGE DE LEMOS NETO TESE DE DOUTORAMENTO DOUTORAMENTO EM ENGENHARIA MECÂNICA FACULDADE DE ENGENHARIA DA UNIVERSIDADE DO PORTO © Rui Neto, 2014 ii | P a g e Acknowledgments There were many people and entities who scientifically, financially and emotionally contributed to the realization of this thesis. It is therefore with great pleasure that I express my sincere gratitude to them. To my late father, wood patternmaker for 49 years, who taught me the foundry fundaments and life values, namely that work is the basis of the life. To Professor Ana Reis, Assistant Professor at the Faculty of Engineering of Porto who is a big friend and was the main driving force and the first responsible for the presentation of this thesis To Professors Jorge Lino, Associate Professor at the Faculty of Engineering of Porto University, and Professor Teresa Duarte, Assistant Professor at the Faculty of Engineering, for the motivation and tireless support. I also thank the confidence that always placed in my work, but above all, I thank the friendship always demonstrated. To Professor Antonio Torres Marques, Full Professor at the Faculty of Engineering of Porto, the numerous attempts, often frustrated, immovable and constantly renewed to take this work forward. To Professor António Barbedo de Magalhães, Professor Emeritus already retired, my true master and great friend, the tireless attempts to get me to take this work forward and the unshakable confidence that for 34 years always placed in me. To all my students, especially the ones who intervened in these teamwork the kindness with which they heard me, and especially what they taught me. -
Implementation of Metal Casting Best Practices
Implementation of Metal Casting Best Practices January 2007 Prepared for ITP Metal Casting Authors: Robert Eppich, Eppich Technologies Robert D. Naranjo, BCS, Incorporated Acknowledgement This project was a collaborative effort by Robert Eppich (Eppich Technologies) and Robert Naranjo (BCS, Incorporated). Mr. Eppich coordinated this project and was the technical lead for this effort. He guided the data collection and analysis. Mr. Naranjo assisted in the data collection and analysis of the results and led the development of the final report. The final report was prepared by Robert Naranjo, Lee Schultz, Rajita Majumdar, Bill Choate, Ellen Glover, and Krista Jones of BCS, Incorporated. The cover was designed by Borys Mararytsya of BCS, Incorporated. We also gratefully acknowledge the support of the U.S. Department of Energy, the Advanced Technology Institute, and the Cast Metals Coalition in conducting this project. Disclaimer This report was prepared as an account of work sponsored by an Agency of the United States Government. Neither the United States Government nor any Agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any Agency thereof. The views and opinions expressed by the authors herein do not necessarily state or reflect those of the United States Government or any Agency thereof. -
Chemical Etching Electroforming Laser Cutting Printed Glass & Film SMT Stencils
Chemical etching electroforming Laser Cutting Printed glass & film SMT Stencils Our Philosophy Thin Metal Parts (TMP) has clear industry leadership in the following areas: • The most complete line of HIGH PERFORMANCE thin metal parts: Electroformed, Laser-Cut and Chem-Milled • Continued TECHNOLOGY LEADERSHIP in the industry...with significant and on-going R&D • An ISO 9001:2008 QUALITY certified company with complete process controls and analytical laboratory. • Highly-trained and dedicated people to provide true APPLICATIONS SUPPORT • A culture of COMMITMENT TO CUSTOMERS with continued investment in people, facilities, equipment and systems to support our commitment to be THE INDUSTRY’S BEST VALUE. We encourage you to closely compare TMP’s products and services to any other supplier. We are confident that TMP delivers the BEST TRUE VALUE. 4733 Centennial Blvd., Colorado Springs, CO 80919 (719) 268-8300 • [email protected] • www.thinmetalparts.com History of Thin Metal Parts 1985 Specialty Parts, a product line of Photo Stencil, was started to address the precision parts needs of the Photo Stencil circuit board manufacturing customers using photo-chemical milling process. 1990 Parts began to be manufactured using the laser cutting process. 1997 Became the first parts manufacturer to become ISO 9001 certified (now ISO 9001:2008). 1999 Began using the electroforming process to manufacture precision metal parts. 2002 Introduced multi-layer and 3D electroforming 2002 The Specialty Products Division became the Thin Metal Parts Company to better focus efforts on thin metal parts development. 2004 Significant efforts began to target new industries in addition to electronics. 2007 Thin Metal Parts acquired industry leading photo-plotting equipment, increasing quality and capability. -
Cutoff Lathes and Endfinishers Brochure
Rotating-Head Cutoff Lathes Tube Loading & Endfinishing Systems • Rugged high-speed cutting, grooving, turning and chamfering • More parts per hour, closer tolerances, reduced labor • Fastest changeover • OD/ID chamfers in a single chucking, both ends • Models for round tubing up to 9" diameter, barstock to 3" HAUT-025RCBrochure2RS.indd 2 1/27/10 1:29:15 PM Our History and Our Commitment to You … Hautau is our family name. It is on every machine we build. That’s why we’ll stand behind you on every one 24/7. Hautau makes world-class tube cutoff machines and systems. They are designed, engineered and built by American craftsmen in the fields of southeast Indiana. Charles F. Hautau Sr, company founder, was a gifted inventor who held over 60 patents including rotary-head cutoff and CNC tube bending. Charles Jr. and Fred have carried on the tradition, building a wide range of innovative machinery for over forty years. Among our early machines was one to trim the ends of mufflers. Because the muffler Charlie Hautau could not spin, our design featured a rotating head. After twenty years of building tube cutting and processing machines and other custom automation, we decided to apply the rotating head concept to cutting thick wall steel tubing. This would form the basis for our standard product line. Traditional tube cutoff lathes have a headstock with a through hole up to two feet deep, so tube feeding methods are limited. The tube can be machined on just one end. Short cuts can fly out and long cuts need outboard support rollers. -
S2P Conference
The 9th International Conference on Semi-Solid Processing of Alloys and Composites —S2P Busan, Korea, Conference September 11-13, 2006 Qingyue Pan, Research Associate Professor Metal Processing Institute, WPI Worcester, Massachusetts Busan, a bustling city of approximately 3.7 million resi- Pusan National University, in conjunction with the Korea dents, is located on the Southeastern tip of the Korean Institute of Industrial Technology, and the Korea Society peninsula. It is the second largest city in Korea. Th e natu- for Technology of Plasticity hosted the 9th S2P confer- ral environment of Busan is a perfect example of harmony ence. About 180 scientists and engineers coming from 23 between mountains, rivers and sea. Its geography includes countries attended the conference to present and discuss all a coastline with superb beaches and scenic cliff s, moun- aspects on semi-solid processing of alloys and composites. tains which provide excellent hiking and extraordinary Eight distinct sessions contained 113 oral presentations views, and hot springs scattered throughout the city. and 61 posters. Th e eight sessions included: 1) alloy design, Th e 9th International Conference on Semi-Solid Pro- 2) industrial applications, 3) microstructure & properties, cessing of Alloys and Composites was held Sept. 11-13, 4) novel processes, 5) rheocasting, 6) rheological behavior, 2006 at Paradise Hotel, Busan. Th e fi ve-star hotel off ered a modeling and simulation, 7) semi-solid processing of high spectacular view of Haeundae Beach – Korea’s most popular melting point materials, and 8) semi-solid processing of resort, which was the setting for the 9th S2P conference.