【中英雙語】418關(guān)于機(jī)械自動(dòng)化彎曲機(jī)折彎機(jī)控制系統(tǒng)設(shè)計(jì)有關(guān)的外文文獻(xiàn)翻譯成品：液壓式折彎機(jī)的設(shè)計(jì)（中英文雙語對照）

1、此文檔是畢業(yè)設(shè)計(jì)外文翻譯成品（ 含英文原文+中文翻譯） ，無需調(diào)整復(fù)雜的格式！下載之后直接可用，方便快捷！本文價(jià)格不貴,也就幾十塊錢！一輩子也就一次的事！外文標(biāo)題：Design of a Hydraulic Bending Machine外文作者：Steve Hankel，Marshall Begel文獻(xiàn)出處: General Technical Report (GTR)，2018 (如覺得年份太老，可改為近 2 年，畢竟很多畢業(yè)生都這

2、樣做)英文 3292 單詞，19509 字符(字符就是印刷符)，中文 5165 漢字。 （如果字?jǐn)?shù)多了，可自行刪減，大多數(shù)學(xué)校都是要求選取外文的一部分內(nèi)容進(jìn)行翻譯的。 ）Design of a Hydraulic Bending MachineAbstract：To keep pace with customer demands while phasing out old and unserviceable test equipment

3、, 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 lu

4、mber, 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 include

5、d 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 capacit

6、y; 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 t

7、est results.Keywords: hydraulic bending machine, dimension lumber, wood testing machineThe primary purpose of the bending machine is to test long- span dimension lumber (nominal 2- by 4-in. to 2- by 12-in., up to 20 ft i

8、n length) at expected loads less than 10,000 lb and deflections less than 6 in. Two machines that have been used by the EML for bending tests are the 160,000-lbf Reihle machine (purchased in 1969) and the 25,000-lbf box-

9、test machine (purchased in 1937). These machines are of questionable reliability and repairability because of their age.A machine that is capable of testing long-span dimension lumber is not currently in production and w

10、ould have to be custom-made at great expense. Therefore, we chose to modify a 100,000-lbf compression test frame with a motor- driven movable head box, which was donated to EML. Many parts of the test frame were removed,

11、 leaving the steel feet, slab, head box positioning screws, and head box. Parts that were added to complete the bending test machine included two wide-flange beams, beam attachment hardware, beam spacer plates, beam end

12、supports, a hydraulic cylinder, cylinder reinforcement hardware, and two four-point load head assemblies. Design considerations for these components are presented in this paper. Although the 100,000-lbf compression force

13、 capacity of the original frame design is much greater than the loads we encounter during bending tests, we discuss the effects of eccentric loads that are more likely to occur in bending tests than in the compression te