Mild Steel

THE ROSE CORPORATION – Carpenter Job

THE ROSE CORPORATION, a Job Shop specializing in large components, is a regular user of VSR Technology Group’s stress relieving service. In this project, a 418″ L, 30-ton mild steel weldment, an Ingot Stripper for CARPENTER TECHNOLOGY, was stress relieved on the shop floor in less than three hours.

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MH EBY

M H EBY MANUFACTURING, located in central Pennsylvania, is a manufacturer of horse and livestock trailers, and truck bodies. A plant upgrade involved installation of a robotic welding manufacturing cell. EBY’s fabrication shop welded the main frame for the robot. To assure dimensional accuracy, they called upon VSR Technology’s On-Site Stress Relief Service. Other considerations for using the service included speed and convenience of having it stress relieved within a few hours, and not having to transport the Frame to a Heat Treater. The welded square-tubing frame was 134″ L, 69″ W, 8″ H, and weighed 1075 lbs.

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THREE D METAL – Clamshell Buckets

THREE D METAL is a SE South Carolina fabrication and machine shop of large components for a variety of industries. As a previous user of VSR Technology’s On-Site Service, we were the vendor of choice to stress relieve a pair of Clamshell Bucket Halves, each half weighing 24.5 tons, being manufactured for the steel industry.

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THREE D METAL – Gerdau Ameristeel

THREE D METAL has employed VSR Technology On-Site Service on two previous projects, involving 250-ton capacity Lifting Yokes and 400-ton capacity Clamshells. In this latest project, performed at GERDAU’s Knoxville, TN mill, a Lower Shell for an electric arc furnace, measuring 30′ L, 20′ W, and 10′ H, was stress relieved in less than 3 hours using the VSR Process. In addition to relieving the weld stresses produced in THREE D METAL’s shop during fabrication, the Job also required stress relieving a full-length field weld, joining the two Furnace Halves.

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REES COMPANIES – Timet Job

THE REES COMPANIES, a job-shop located West of Philadelphia, PA. As a previous user of VSR Technology’s On-Site Stress Relief Service, we were the vendor of choice to stress relieve a Down-Ender Metal Processing Assembly being fabricated for TIMET. This mild steel weldment measured 16’L X 11’W X 5.5’H, and weighed 3 tons. REES cited both the speed of the VSR Process, and the completeness and quality of stress relief documentation as key reasons for again choosing the service.

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VULCAN MACHINERY

VULCAN MACHINERY chose AIRMATIC INC’s VSR Technology Group to stress relieve welded, heavy-walled, 5-ton steel rings in preparation for precision machining. Using a VSR-8000 System, the job was done on-site at the fabrication shop, and resulted in stable and accurate precision components.

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CND INCORPORATED

Large distortion during separation of 9500 HP Fan Housing halves led a large fabrication shop to explore the VSR Process as an alternative to heat straightening. The results obtained using the VSR-8000 System were significant: a 90% reduction in the distortion that had plagued CND in the past.

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THE ROSE CORPORATION – Reading Crane Job

A large-scale job shop, subcontracted VSR Technology to stress relieve a mild steel weldment, a 135-ton capacity lifting component for a READING CRANE AND ENGINEERING overhead crane. The workpiece had an overall size of 17′ X 15′ X 2′, and weighed 23,600 lbs. For this job, VSR Technology used its latest model stress relief system: the VSR-8000 System.

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TRI-ALLIANCE FABRICATING JOB #2

TRIALLIANCE FABRICATING, a steel fabricator, subcontracted VSR Technology to stress relieve a second mild steel, welded Trunnion Base. The workpiece was, 28′ x 8′ x 1.5′ and consisted of 2 heavy-walled, rigid 28′ beams joined by 3 much lighter structural cross members. A similar workpiece had been successfully threaded (based on dimensional stability during machining, and subsequent assembly and usage in January, 2004).

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TRI-ALLIANCE FABRICATING JOB #1

TRI-ALLIANCE FABRICATING subcontracted VSR TECHNOLOGY to stress relieve a 28′ x 8′ x 1.5′ mild steel, welded Trunnion Base. The workpiece fabrication consisted of two (2) heavy-walled, rigid, 28′ beams joined by three (3) much lighter structural cross members. Such workpieces require more than one VSR Treatment to assure dimensional stability, since the two high-rigidity segments respond independently when vibrated.

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McLANAHAN CORPORATION

Is a manufacturer of large equipment used in the mining, and pit and quarry industries. They have been successfully using VSR TECHNOLOGY equipment on large, dimensionally critical components since 1996. In December 2003, VSR TECHNOLOGY was invited to the plant to demonstrate its newest model, the VSR-8000 System on a crusher frame component, which was a new, more rigid form of McLANAHAN’s previous designs.

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INGERSOLL MACHINE TOOLS INC

A manufacturer of special machine tools, is a regular user of the VSR Process. This report describes the successful use of the VSR System on the Cross-Rail member of a gantry-style milling machine.

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INGERSOLL MACHINE TOOLS INC (Rectangular Tubing Job)

INGERSOLL MACHINE TOOLS is a manufacturer of some of the world’s largest milling machines. During machining of two (2) 28′ X 8′ X 8′ fabrications, defective welding was found and replaced. This repair raised concerns among INGERSOLL’s Engineers about the dimensional stability of the Workpieces for machining, so that dimensional accuracy and stability would be assured.

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INGERSOLL MACHINE TOOLS INC

To date, INGERSOLL has produced milling machines capable of machining parts over 100 feet in length. Stress relieving their machines’ components can be a challenge. The VSR process was used to stabilize a 59 foot long milling machine gantry. Stress relieving the workpiece both before and after rough machining (total time < 4-hours) resulted in a dimensional accuracy of 0.0036" over the entire length, and only 0.0018" in the critical center portion of the component where spindle travel occurs.

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