关于机械自动化弯曲机折弯机控制系统设计有关的外文文献翻译成品：液压式折弯机的设计（中英文双语对照）.docx

此文档是毕业设计外文翻译成品（ 含英文原文+中文翻译），无需调整复杂的格式！下载之后直接可用，方便快捷！本文价格不贵,也就几十块钱！一辈子也就一次的事！ 文献出处:Steve Hankel，Marshall Begel General Technical Report (GTR)，2020(如觉得年份太老，可改为近2年，毕竟很多毕业生都这样做) 英文3292单词，19509字符(字符就是印刷符)，中文5165汉字。（如果字数多了，可自行删减，大多数学校都是要求选取外文的一部分内容进行翻译的。） Design of a Hydraulic Bending Machine Abstract：To keep pace with customer demands while phasing out old and unserviceable test equipment, the staff of the Engineer- ing 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. Keywords: hydraulic bending machine, dimension lumber, wood testing machine Introduction 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 (Fig. 1). The machine is used to support long-span beams and to apply a hydraulically driven bending force to the beams in accordance with standard testing procedures. This paper describes the parameters and considerations for designing this machine to enable the EML staff to complete needed tests in a manner that is user- friendly and safe. The mission of the EML is