Heavy Workpiece

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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HARRIS STRUCTURAL STEEL

At the direction of NEW YORK STATE DEPARTMENT OF TRANSPORTATION (NYDOT), HARRIS STRUCTURAL STEEL undertook a heat-straightening of a 60’L, 86,500 pound bridge segment, which resulted in unacceptable distortion. The addition of internal bracing near each end of the segment resolved the distortion, however NYDOT required that a stress relief be done, to ensure structural integrity. The most practical means of doing so was the VSR Process.

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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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CAMERON COMPRESSOR

The Compression Systems Division of CAMERON (formerly COOPER COMPRESSION, COOPER ENERGY SERVICES, and COOPER TURBOCOMPRESSOR) is a leading manufacturer of reciprocating and centrifugal compressors. When three (3) 151″ L, cast iron Compressor Frames (manufactured in China) displayed distortion after final machining, it became evident that the Chinese manufacturer’s thermal stress relief treatment had not been effective. Because the Frames had already been final machined, CAMERON needed to find a way to save them from becoming scrap. VSR Technology’s resonant frequency vibratory stress relief process proved to be the answer to saving the Frames.

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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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VOITH SIEMENS JOB #2

VOITH-SIEMENS is a manufacturer of power generation systems. One of their more recent designs involved the use of both low-carbon and austenitic stainless steels in the construction of a 4-quadrant hydro-turbine bottom ring. The VSR Process was used to prevent distortion occurring during either final machining, or the transport of the disassembled bottom ring to the installation site.

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VOITH SIEMENS JOB #1

A manufacturer of hydro-turbine equipment used for power generation received an order to replace 4 tons of cavitated cast steel in 100,000 lb. bottom ring assembly, they chose the vibratory stress relief process to assure stability throughout fabrication and machining. The result was not only an 80% to 90% reduction of distortion at a critical stage in the fabrication process, but also a considerably more stable work piece during final machining.

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MIDWEST FORGE (MWF)

Back in 1989 MIDWEST FORGE (MWF) of Cleveland, OH faced a costly decision. One of their larger presses (8000 ton capacity) had broken due to overload. Tooling had been installed and parts processed which required press tonnages 25% beyond the press’s capacity. Within a short time, the press was down. Several cracks had appeared and they were growing.

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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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