Working with your peopleIf people are your most precious resource, why aren't you spending more money to train them properly?
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Examining roll forming machinery, tooling, and lubricationGiven the problems in your roll forming operation aren't attributable to material, you may want to look into machinery setup and especially your lubrication situation to uncover the real culprit.
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Material—Is it always a problem?If the problem with your roll forming operation lies in your material, here are some tips in getting to the heart of the problem.
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Exploring the roll forming process: What you need to make a part.If trying to improve your roll forming operation, look at the four M's -- machine, materials, manpower, and method. Those four areas hold the key to whatever may ail you.
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Selecting the right materials for roll forming—Part 1This is the first part of a two-part article. Read Part II.If you >examine the mechanical properties of several materials, including carbon steel, alloyed steel, stainless steel, as they relate to roll forming, you'll gain an understanding of the influence of some primary metal processes on roll forming.
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Advanced roll forming troubleshooting: Avoiding potential problems in the machine, material, and toolingWhen troubleshooting a roll forming operation, you first need to make sure the roll form tooling is designed and built properly and will produce a quality product when all the conditions are correct.
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How important is roll forming lubrication compatibility?At first glance, it doesn't seem that the compatibility of the lubricant used in the roll forming process needs much attention. You'd better look again. It may surprise you that the chemical and physical properties of the roll forming lubricant leave fingerprints in at least six different areas of the operation.
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Worn out roll forming tooling and no drawings?: Reverse-engineer itYou may have found yourself saying, "I need to make an engineering change to my roll form tooling, but I don't have the roll tooling designs or drawings." When you are faced with this situation you will have to start at the beginning, basically, and reverse-engineer the complete set of roll form tooling.
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Roll forming basicsRoll forming, often called open-section forming, uses successive sets of roller dies to bend a strip of steel progressively until the desired shape is achieved. This process is very similar to traditional tube- and pipemaking, but differs in that it can form more complicated sections.
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A good start makes a difference: How to set the entrance guide elevation for best results in roll formingUnderstanding the relationship between the elevation of the entrance guide and the shape of the roll formed strip is crucial to satisfactory roll forming. The entance guide elevation, if improperly set, can cause the strip to bow and twist as it leaves the first forming pass. Setting the elevation properly can help to eliminate additional stress and strain at the strip edges that cause bow and twist.
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In the loop on closed-loop roll forming?: Understanding the merits, drawbacks of open- and closed-loop control systemsIn roll forming, non-stop punching and shear systems have traditionally employed simple open-loop control methods. Closed-loop (also called servo-based) systems can overcome many limitations of the open-loop design and yield higher line speeds, reduce downtime, and reduce scrap.
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End distortion on roll formed parts: Investigating causes and curesRoll-formed parts are subject to end distortion when the parts are cut at the end of the roll-forming line. Understanding the forces that contribute to end distortion is the first step to balancing the forces and eliminating end distortion.
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Roll forming using spring-loaded top rollsFor certain sheet metal applications, roll forming with spring-loaded top rolls is a practical production method. This article explains the process, describes various machine configurations, and outlines the criteria for suitable applications. It also discusses product requirements that are incompatible with this process.
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Stud-maker throws church building a curve: Curved studs facilitate free-spanning domeRadius Track, a fabricator specializing in its patented curved metal studs, replaced many of the heavy-gauge beams in the a church's dome frame with light-gauge steel studs. As a result, the dome was light enough to be supported without view-obstructing columns.
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Surveying suitability of welding processes for roll formed parts: ArrayArray
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Is metal roofing fabrication right for your shop?: How to ensure your roll forming operation is a good fitWhen deciding wheher or not to produce roofing panels, you need to determine your ROI, based on if you can use existing equipment or need new equipment, the required panel appearance; possible line configuration; and material handling options.
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Roll form tooling design for air bending: Selecting a techique for reduced distortionSeveral techniques are used commonly to reduce profile distortion when air bending with a roll former. These include small-radius forming, false bending, vertical side rolls, and angle side rolls.
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Rolling to market: ArrayArray
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Edge treatments for roll formed parts: Eliminating burrs to eliminate injuries, scratchesAccording to OSHA and BLS data, safety in metal manufacturing has been improving. Workplace injuries and injury severity fell from 2000 to 2006. The biggest improvements have been in severe injuries, so minor injuries have gotten more attention lately. One such minor injury is cutting. Roll formers can do their part to prevent workplace cuts by focusing on deburring.
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Understanding bending, moving material in roll forming: Directing forces for optimal resultsRoll forming is a matter of two processes: shaping material using localized deformation with a large amount of material movement (in other words, bending and moving the material). Localized deformation (bending) is a permanent bend with a slight thickness reduction at the bending line. Material movement is a matter of relocating or rotating a section, either formed or unformed, without changing its shape. Although roll forming engineers often address these processes at the same time, it can be helpful to consider forming and movement separately.
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Continuous improvement for roll forming: Part I: Measuring capacity and utilizationContinuous improvement and statistical process control are useful, time-tested techniques—they have been used since the 1950s—but their use must be tailored to specific applications. For example, a typical manufacturing metric is parts per minute, but many roll formers should measure feet per minute. This and other tips can help roll formers accurately evaluate their productivity and measure the impact of process improvements.
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Rotary punching revisited: Taking a new look at an old friendNew ways to increase production, reduce laborcosts, and maximize floor space may be foundby revisiting a 50-year old technology—rotarypunching. Many part features and patterns canbe punched and formed using pull-throughrotary units at up to 300 feet per minute(FPM) in materials as thick as 1/16 inch. Inaddition, cam technology allows rotarypunching and forming of material thicknessesup to 0.105 in. (12 gauge). Servo drivesempower line speeds as fast as 650 (FPM).
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Roll forming gets flexible: Technology evolves to meet the demands of lower-volume productionArray
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Surveying suitability of welding processes for roll formed parts - Part II: A look at resistance weldingOf the many weld processes used, resistance and fusion welding are the most likely to be integrated with roll forming. This article takes a look at two resistance welding processes: high frequency welding and rotary spot welding.
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Rolling to market - Part I: Cutting lead-times with on-site roll formingFor many jobs, the toughest part isn't roll forming the parts themselves—it's getting those parts to the customer. . Parts are cut-to-length, then placed on immense wooden frames in such a way that allows the maximum load on a truck. That's a lot of material handling. But what if a shop eliminated the packing altogether by taking the roll forming to the job site itself?
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Reality TV: Frame-making in the U.S.: Oceanside, Calif.-based fabricator successfully competes in global CRT framemaking marketSumitomo Metal Mining USA (SMMU) Inc. has supplied cathode ray tube frams to some of the largest, high-end television manufacturers in the world from its Oceanside, Calif., facility. Despite the trend in moving manufacturing overseas to take advantage of cheaper labor pools, SMMU believes it is poised to remain competitive while maintaining its U.S. base of operations.
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Holding the line on metal costs: Reducing coil line scrap can expand your bottom lineStampers and roll formers can look at edge trim, heads, tails, skeletons, and coil damage for ways they can reduce scrap to hold the line on metal costs.
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Rolling to market: ArrayArray
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Rolling to market - Part II: More roll forming, less coil handlingA variety of methods help push a roll forming operation's efficiency. Various coil handling methods offer different levels of efficiency and automation, each suiting certain applications. The key is to analyze an operation, calculate the time spent handling coil, and then determine the best level of coil handling automation to fit.
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Tier 1 supplier turns auto industry requirement into opportunity: Stamper uses standards for lighter weight, improved quality to take operation to the next levelWith 50 years of metal stamping expertise under its belt, Speciality Stampings LLC, Adel, Ga., has established itself as a first-, second-, and third-tier supplier to the automotive industry. The manufacturer, QS-9000- and ISO 9002-certified, specializes in metal stamping, roll forming, assembly, and powder painting.
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Opening the gate to efficiency: Farm equipment-maker combines new, custom machines to boost productivitySince 1945 family-owned and -operated Tarter Gate has grown in staff and sales as it has changed the design of its products. To keep up with sales, continue growing the company, and absorb as many rising costs as possible — particularly in steel and fuel prices — the company uses custom machines and new technologies to its advantage.
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Roll forming high-strength materials: Higher strength, more springback, more forming challengesThe use of high-strength materials is growing, and roll forming engineers and tooling designers who want to form this material successfully need to arm themselves with knowledge about these materials, their capabilities, and the limitations. Knowledge gained from press brake bending operations is useful in predicting how these metals will form on a roll forming line.
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New bends in the roll: Roll bending trendsAs more commercial buildings are designed with larger open spaces, the beam spans grow longer, and the beams must be bigger and heavier. This requires ever-larger section bending rolls to accommodate this demand. In addition, the trend toward the use of higher strength steels has taxed the capabilities of plate roll bending equipment. These changes and other emerging demands have driven the trend toward the use of CNCs, inline material handling, and larger angle bending rolls.
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