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拉伸试验是材料的基本试验。在这一项试验中,变形仪几乎是不可缺少的仪器。目前我国所用引伸仪,大多数由外国进口。向外国订购变形仪,在时间上和经济上都是不利的。从增产节约的原则出发,有必要自己制造简单而实用的变形仪。变形仪的种类很多,其中以千分表式变形仪最为简单实用。现将本人设计的千分表式变形仪介绍于下:一、仪器的用途本仪器是利用百分表(或千分表)来测量拉力试件的弹性变形(或部份塑性变形),限用于直径6～20公厘的圆断面或长及宽皆小于20公厘的矩形断面试件,测量标距为50公厘以上,测
Tensile testing is the basic test of materials. In this experiment, deformable instrument is almost indispensable instrument. Extensometers currently used in China, most imported by foreign countries. Ordering deformometers from foreign countries is both detrimental in terms of time and economics. From the principle of increasing production and saving, it is necessary to make simple and practical deforming instruments by ourselves. There are many types of deforming instruments, of which the most simple and practical one is a dial gauge deforming instrument. Now I design the dial gauge deformation instrument introduced in the following: First, the use of equipment The instrument is the use of dial indicator (or dial gauge) to measure the tensile deformation of the specimen (or partial plastic deformation), limit For 6 to 20 mm in diameter of the circular cross-section or the length and width of less than 20 mm rectangular cross-section specimens, measuring the standard distance of 50 mm above the measured