By B. M. Gliner
Choice of the Mechanical and Technological houses of Metals provides the important sorts of trying out computing device and kit. This e-book offers a short description of the tools for selecting the imperative mechanical and technological houses of metals. geared up into 3 chapters, this e-book starts with an summary of mechanical checking out of metals subdivide into static, dynamic, and fatigue trying out based of the tactic of load program as a functionality of time. this article then describes weld steel operating below tensile loading stipulations. different chapters ponder many of the equipment for the decision of the technological houses of metals, together with longitudinal turning technique and face turning technique. This booklet discusses to boot the equipment of settling on the machinability of metals, together with two-tool try process, drilling try out, and temperature attempt. This publication is a useful source for college kids taking sensible laboratory classes in steel operating at technical schools. Laboratory group of workers also will locate this e-book invaluable.
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At the midpoint of the testpiece span. In the second loading method, the load is applied at two points [Fig. 29(b) ] at equal distances from the support points, the loading forces being also identical. 49 BEND TESTING Pig. 29 Loading diagrams for bend tests: a - concentrated loading at the centre point; b - concentrated loads at two points; 1 - support; 2 and 2r - points of load application; 3 - testpiece; 4 - support; 5 - cross piece. The maximum moment is Mmax = ττ" kg/mm. &/ 2 The moment has a constant value for all testpiece crosssections lying between the points of application of the force -r·.
The maximum testpiece diameter is 100 mm and the length of the machine is 1100-1500 mm. Machines are available for twisting moments of I50, 300 and 6OO kgm. These machines can be driven by hand or from an electric motor. K-50 torsion testing machine. This machine (Pig. , and for rectangular testpieces of sheet metal, of width up to 30 mm and thickness up to I4 mm. The gauge length of testpieces is 100-700 mm. On the right-hand upright of the machine is arranged a worm reducing gear 1, driving shaft 2.
34 (as laid down by GOST 1524-42). Position/ Fig. 5°. The notch made in the testpiece should be in a direc tion exactly perpendicular to the testpiece edges. All tests should be done at temperatures between 15° and 25°C, using the following test procedure. A testpiece 5 (see Fig. 33) is placed in two holding jaws of the machine, care being taken that the cutter blade of the pendulum bob lies accurately on the line of the testpiece notch, and behind the notch. 2 mm. The distance between support jaws should not exceed 40 mm (+ 0-0#5mm).