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Articles tagged with "drawing"

Results: 51

	Not your father's abrasive jet: Technological advances, attention to common woes give fabricators options for precision cutting By: John H. Olsen, Contributing Writer The advances made in abrasive jet cutting in recent years have negated much of the downside formerly associated with the technology. Publish date: July 12, 2001 Tech cell: Waterjet Cutting
	Folding technology makes sweeping changes: New developments in 200-year-old technology By: Geoff Stone, Contributing Writer Schwenkbiegemachinen, or swing bending machines, have been in use for more than 200 years. European manufacturers began to power them with electrical or hydraulic power after World War II, when an enormous amount of sheet metal was used in the reconstruction of Europe. Publish date: December 11, 2003 Tech cell: Folding
	Hydroforming of tubes, extrusions, and sheet By: Klaus Siegert, Markus Haeussermann, and Bruno Losch, Contributing Writer Recent advances at the University of Stuttgart and acfross the industry have opened doors for hydroforming all kinds of materials and shapes. Publish date: May 15, 2001 Tech cell: Hydroforming
	Eliminating final trim shearing of hydroformed tube By: Donald Godfrey, Scott Huth, and Murray Mason, Contributing Writers The most common way to establish tube length after hydroforming is by cutting or shearing the tube to a specified dimension; however, cutting out this step can reduce scrap. A new method designed to eliminate this step combines forming the end of a tube to resemble its final form with using a hydroform die to correct end position variations off the bender. While this approach eliminates the final shear trim operation, it also presents new challenges. Publish date: October 9, 2003 Tech cell: Hydroforming
	Stretching metal's forming limits with HSP lubricants: Forming aluminum, high-strength steel without tooling upgrade By: Brad Jeffery, Contributing Writer Publish date: June 12, 2003 Tech cell: Metals/Materials
	Warm forming of stainless steels: Array Array Publish date: Array Tech cell: Metals/Materials
	Warm forming of stainless steels - Part I: Rationale and previous studies To prevent martensitic transformation in stainless steel during drawing operations, warm forming has been explored. In experiments, warm forming eliminated intermediate annealing operations and substantially increased limiting draw ratio values. Publish date: July 11, 2006 Tech cell: Metals/Materials
	Warm forming of stainless steels - Part II: Simulations and experiments The ERC/NSM conducted experiments using round cup tooling to determine the influence of temperature on the limiting draw ratio -- the largest draw ratio of the blank-to-cup diameter that can be drawn successfully. Publish date: August 8, 2006 Tech cell: Metals/Materials
	Top-down modeling: A reader's question presents an interesting challenge By: Gerald Davis A reader has a question about modeling an assembly comprised of three plates and tubing. Columnist Gerald Davis provides guidance. Publish date: July 1, 2009 Tech cell: For Engineers
	The most important output of 3-D CAD modeling: Techniques to consider when modeling components in for a design project By: Gerald Davis The most important output from a CAD system is the bill of material. Columnist Gerald Davis gives us an idea of just how much detail should go into creating a BOM. Publish date: June 1, 2009 Tech cell: For Engineers
	Love of loft in 3-D CAD modeling: Lofts are powerful tools for modeling shapes that transition between profiles By: Gerald Davis Leaning to use the loft tool in 3-D CAD modeling takes some work, but it can come in handy in certain circumstances. Publish date: May 1, 2009 Tech cell: For Engineers
	Getting swept away in 3-D CAD modeling: Sweeps are powerful tools for modeling shapes that follow some sort of path By: Gerald Davis Like an extrude or revolve, a sweep is a tool for modeling a 3-D shape. A sweep consists of three basic elements--a profile, a path, and a set of rules for "sweeping" the profile along the path. A sweep can be a powerful tool when modeling 3-D shapes, according to columnist Gerald Davis. Publish date: April 1, 2009 Tech cell: For Engineers
	Modeling in a 3-D CAD system: How to decide whether to revolve or extrude By: Gerald Davis Although tough times are upon us, an economic downturn doesn't have to put all plans on hold. If you own a middle-market company (one that has a transaction price between $5 million and $250 million) and you are interested in selling it, a slumping economy is no reason to hesitate. In fact, putting your company on the market during a slowdown can have several benefits. Publish date: March 1, 2009 Tech cell: For Engineers
	Dimensioning in a 3-D CAD system: Dimensions transform the artistic inspiration into reality By: Gerald Davis Columnist Gerald Davis explains that preparing a 3-D CAD model without dimensions may look great, but it doesn't really do anybody any good. For example, a 3-D CAD model with dimensions helps quality control inspectors. Publish date: February 1, 2009 Tech cell: For Engineers
	Sketching in a 3-D CAD System: Welcome to the foundation of 3-D modeling By: Gerald Davis Columnist Gerald Davis describes different approaches to sketching in a 3-D environment. Publish date: January 1, 2009 Tech cell: For Engineers
	The real world of 3-D CAD assemblies: These files take a design one step closer to reality By: Gerald Davis Columnist Gerald Davis describes the benefits of working with 3-D CAD assemblies. Publish date: December 1, 2008 Tech cell: For Engineers
	3-D CAD drawings in a 2-D world: Generating a great print is the goal By: Gerald Davis Columnist Gerald Davis discusses the importance of delivering a clear illustration and how it can make an impact on the final fabricated product. Publish date: November 1, 2008 Tech cell: For Engineers
	Thinking inside the box: What does top-down design mean anyway? By: Gerald Davis Columnist Gerald Davis delves into why top-down design might be useful when modeling a metal fabrication in 3-D CAD. Publish date: October 1, 2008 Tech cell: For Engineers
	3-D CAD strengthens customer bond: What goes into a successful 3-D CAD work center? By: Gerald Davis Columnist Gerald Davis asks his fabricating readers if they know what it truly takes to keep up a fully functioning 3-D CAD software system. Publish date: September 1, 2008 Tech cell: For Engineers
	One easy piece to model: What to do while you wait for CAD training By: Gerald Davis Columnist Gerald Davis believes it's a shame when a shop doesn't use its 3-D CAD software to its fullest potential. That's why he takes the reader through a modeling tutorial. Publish date: August 1, 2008 Tech cell: For Engineers
	Getting a handle on 3-D CAD modeling: Tricks to make the tool bend to your will By: Gerald Davis Columnist Gerald Davis provides the reader with a brief overview of some of the handy 3-D CAD tools he uses when doing basic modeling techniques. Publish date: July 1, 2008 Tech cell: For Engineers
	Unfolding truth about flats: Just how much does a CAD jockey need to know about flat layouts anyway? By: Array Columnist Gerald Davis reveals the usefulness of unfolding parts on the computer screen. Publish date: Array Tech cell: Array
	Unfolding truth about flats - Just how much does a CAD jockey need to know about flat layouts anyway? By: Gerald Davis Columnist Gerald Davis reveals the usefulness of unfolding parts on the computer screen. Publish date: June 1, 2008 Tech cell: For Engineers
	Unfolding truth about flats: Just how much does a CAD jockey need to know about flat layouts anyway? By: Array Columnist Gerald Davis reveals the usefulness of unfolding parts on the computer screen. Publish date: Array Tech cell: Array
	The importance of the n value in sheet forming By: Taylan Altan, Contributing Writer Strain hardening is represented by the exponent n in the flow stress equation, which approximates the relation between true stress and true strain during plastic deformation of a metal. The constant n plays a crucial role in sheet metal forming, and this brief article describes its effects. Publish date: October 11, 2001 Tech cell: Press Technology
	Experimenting with flexible blank holder force control: Prototype shows promise for difficult-to-form materials By: Leonid Shulkin, Jeffrey Rowan, Taylan Altan, and Gary L. Kinzel, Contributing Writers The quality of deep drawn sheet metal products is determined largely by the rate at which a sheet is drawn into a die. Varying blank holder force (BHF) as a function of time or the press stroke is of great importance. Publish date: July 12, 2001 Tech cell: Press Technology
	Dieless NC forming By: Taylan Altan, Contributing Writer Dieless NC forming or incremental sheet forming is a numerically controlled incremental process that can produce complex shapes from various materials. The process is based on localized plastic deformation in the sheet metal blank. It was developed as an alternative manufacturing method to prototype sheet metal stampings and produce panels in small lot sizes. Publish date: June 12, 2003 Tech cell: Press Technology
	Designing high-strength steel stamped parts for formability By: Art Hedrick, Contributing Writer The use of high-strength steel to manufacture automobiles and other transportation vehicles has increased dramatically. The material's strength allows manufacturers to reduce vehicle weight substantially and increase fuel efficiency, without sacrificing performance. Publish date: June 12, 2003 Tech cell: Press Technology
	Key design principles for successful deep drawing By: Art Hedrick, Contributing Writer Successful deep drawing depends on many factors. Ignoring even one of them during die design and build can prove disastrous. Publish date: May 30, 2001 Tech cell: Tool and Die
	Achieving straight-side capabilities in a gap-frame press: New developments in motion and frame technology By: David G. Stone, Contributing Writer Recent changes in tooling technologies, material specifications, part quality requirements, and inventory levels have driven the demand for new developments in the way a mechanical press operates. This article discusses how link motion and bridge-frame structures help stampers. This includes a description of what link motion is and how it works, and how bridge frame presses affect frame deflection. Publish date: October 25, 2001 Tech cell: Tool and Die
	Resisting cracking, deformation, and premature wear: Powder metallurgical steels provide an alternative to conventional tool steels By: James Kaszynski, Contributing Writer Want to know how powder metallurgical tool steels are produced and how their properties provide the material's toughness and wear resistance? Read on. Publish date: June 15, 2001 Tech cell: Tool and Die
	How to draw round cups deeper By: The Ohio State University ERC for Net Shape Manufacturing Draw depth is limited by the onset of wrinkling and fracture. Controlling blank holder force plays a major role in achieving the amount of draw you want from blank material. Publish date: January 15, 2001 Tech cell: Tool and Die
	Improving blank edge conditions By: Young Seo, Contributing Writer A blank, stamped in the first station of a progressive stamping operation, usually is subject to subsequent forming processes to form a designated part. If the blank is subject to straining, deformation, bending, stretching, or lateral expansion in later stations, its edge condition should be carefully examined. Publish date: July 24, 2003 Tech cell: Tool and Die
	Die geometry for embossing and stretching By: Art Hedrick, Contributing Writer Stretching or embossing, not to be confused with drawing, is the process in which the part's geometry is obtained by stretching the metal into a forming cavity. Publish date: August 28, 2003 Tech cell: Tool and Die
	Selecting a pressure system for a stamping die By: Art Hedrick, Contributing Writer Author's Note: Before I begin, I would like to take this opportunity to express my sincere thanks to thefabricator.com's readers. I hope you have enjoyed the stamping articles, and I am excited about writing for 2004. I also would like to wish all of you a great holiday season as well as a prosperous and successful year. Best holiday wishes!Art Publish date: December 11, 2003 Tech cell: Tool and Die
	Selecting a stamping die pressure system, Part II By: Art Hedrick, Contributing Writer Publish date: February 12, 2004 Tech cell: Tool and Die
	Sink-making secrets By: Art Hedrick, Contributing Writer Publish date: June 8, 2004 Tech cell: Tool and Die
	Sheet Metal Stamping 101: Array By: Art Hedrick, Contributing Writer Array Publish date: Array Tech cell: Tool and Die
	Sheet Metal Stamping 101 Part V: Forming operations: Part V: Forming operations By: Art Hedrick, Contributing Writer How are bending, flanging, coining, embossing, stretching, curling, hemming, ironing, necking, and drawing related? They all are common metal forming operations. Find out more about these processes in this final installment of stamping expert Art Hedrick's sheet metal stamping series. Publish date: December 15, 2009 Tech cell: Tool and Die
	Cutting tube in a recut operation: How to decide on a method and equipment By: Klaus Schonfeld, Contributing Writer This piece, which originally appeared in TPJ-The Tube & Pipe Journal in 1997, explains how to decide whether to cut tubing on the production line or cut it later in a recut operation. Discusses various types of recutting equipment and focuses on the dual-blade shear cutting method. Publish date: October 25, 2001 Tech cell: Tube and Pipe Fabrication
	Batter up! Turning an aluminum tube into a baseball bat By: Kevin Cole and Eric Lundin, Editor, TPJ-The Tube & Pipe Journal� The roar of the crowd, the shouts of the umpire, the crack of the bat hitting the ball—these are the unmistakable sounds of a baseball game. Over the last few decades, however, one of those sounds has changed; now the bat tends to make a ping that resonates when it hits the ball. It's the sound of aluminum rather than wood making contact with the ball. Publish date: May 29, 2003 Tech cell: Tube and Pipe Fabrication
	The Bold in Arches: Pipe fabricator uses induction bending to create roof truss assemblies By: Dan Davis, Editor-in-Chief The phraseobstructed viewis probably most connected with older sports stadiums. For example, at Wrigley Field in Chicago, depending on where your seat is, watching Sammy Sosa in action in right field might be replaced by a view of a rusting steel girder. Publish date: June 26, 2003 Tech cell: Tube and Pipe Fabrication
	Tube prep for the drawing step: A close look at push pointing By: George A. Mitchell and Paul Russo Pointing, sometimes called tagging or swaging, is a process that reduces a tube's end to permit it to pass through a draw die for a drawing operation. After the tube end goes through the draw die, gripper jaws converge on the point to begin the draw operation. Push pointing is accomplished by gripping a tube and advancing pointing dies over the end, resulting in a reduced end diameter. Publish date: August 12, 2008 Tech cell: Tube and Pipe Fabrication
	Examining tube mill roll tooling, setup, and maintenance By: Dan Ventura, Contributing Writer In today's competitive market, two of the most important considerations for high-quality production are proper roll tooling setup and mill alignment. Publish date: September 17, 2001 Tech cell: Tube and Pipe Production
	Solving the mysteries of the fin pass—Part 2 By: W.B. "Bud" Graham Editor's Note: This article is the second part of a two-part series about fin passes. Part I, which appeared in the March issue, discussed their location, what they do, and how they do it. Part II focuses on troubleshooting. Publish date: May 15, 2003 Tech cell: Tube and Pipe Production
	Roll form tooling tryout and troubleshooting: Taking a five-step approach By: Dan Mennecke, Contributing Writer The secret to developing successful roll tooling—whether for tube production or roll forming—and achieving maximum roll integrity is a simple but often overlooked notion: a comprehensive approach. Publish date: May 29, 2003 Tech cell: Tube and Pipe Production
	Reducing conversion cost in a copper tube mill: Lean initiatives, measurable results By: David Liddle Sorting through the myriad quality programs and manufacturing trends—total quality management, Six Sigma, lean manufacturing—can be a daunting challenge. Knowing which strategies to use and how to use them can deliver big results in a copper tube production facility. Publish date: September 11, 2007 Tech cell: Tube and Pipe Production
	Secrets of Using GTAW for Tools and Dies: One retired fabricator share the basics of how he added this services to his shop By: Earl Durfee, Contributing Writer Tool and die welding can be a very lucrative service for a fab shop. However, tool and die welders are about as rare as brain surgeons because of a general lack of knowledge about the process and because of the extra expense it brings to a shop. This article offers a basic understanding of what's needed to add this service to your fab shop. Publish date: November 17, 2002 Tech cell: Arc Welding
	The Brakes- Press Brakes and You -- How to get the most out of your press brake By: Bob Butchart, Contributing Writer Problems with your press brake imperil what could be the most valuable machine you have. Take pains to ensure the health of this valuable piece of equipment. Publish date: June 18, 2001 Tech cell: Bending
	New PC-based controls open path to better press brake utilization: Control improvements simplify operator use By: Todd A. Kirchoff, Contributing Writer Press brake forming always has been a labor-intensive process. Shrinking lead-times and smaller lot sizes demand more frequent setups, which cut into productive output hours and put more pressure on manufacturing efficiencies. Fabricators need to find ways to reduce machine downtime for setup and operator adjustments. Publish date: November 6, 2003 Tech cell: Bending
	Laser cell system gives job shop the home field advantage By: Kate Bachman, STAMPING Journal® Editor Contract manufacturer CGI Automated Manufacturing Inc., Cicero, Ill., fabricates parts as an outsource resource for vertical manufacturers. The company started out as a stamping operation, then added other fabrication technologies, including welding, press brake forming, drilling, punching, rolling, shearing, and cutting. Publish date: February 12, 2004 Tech cell: Laser Cutting