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    Author(s): Steven G. Hankel; Marshall Begel
    Date: 2004
    Source: Gen. Tech. Rep. FPL-GTR-148. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2004. 5 pages
    Publication Series: General Technical Report (GTR)
    Station: Forest Products Laboratory
    PDF: View PDF  (794 KB)

    Description

    To keep pace with customer demands while phasing out old and unserviceable test equipment, the staff of the Engineering Mechanics Laboratory (EML) at the USDA Forest Service, Forest Products Laboratory, designed and assembled a hydraulic bending test machine. The EML built this machine to test dimension lumber, nominal 2 in. thick and up to 12 in. deep, at spans up to 20 ft and loads up to 20,000 lbf. The hydraulic bending test machine was built using parts of a 100,000-lbf compression test frame. Added components included W12 by 65 steel beams; steel tube sections, L sections, and threaded rods for beam attachment; I-beam spacer plates; wood block beam end supports; a 4-in. bore, 10-in. stroke hydraulic cylinder with 38,000 lbf capacity; steel plates for cylinder reinforcement; and two pivoting four-point load head assemblies. Eccentric loads that might occur during a test will not yield the positioning screws of the machine head or otherwise affect test results.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hankel, Steven G.; Begel, Marshall. 2004. Design of a hydraulic bending machine. Gen. Tech. Rep. FPL-GTR-148. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2004. 5 pages

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    Keywords

    Hydraulic bending machine, dimension lumber, wood testing machine

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