A simple and quick test method for rotatability

Abstract

The invention discloses a simple and quick test method for rotatability, which belongs to the field of mechanical technology, and includes preparing a flat blank; pressing and fixing the flat blank on a mandrel, and performing a rotational movement together with the mandrel; setting a tool and establishing workpiece coordinates system, determine the spinning track path, and compile the program; run the program to spin the test piece, and when the test piece breaks, read the workpiece coordinates at the moment of fracture; substitute the read workpiece coordinates into the calculation formula to obtain the spinnability of the metal material The limit thinning rate and the limit semi-cone angle are expressed; the test device of the present invention is simple, convenient and efficient, low in cost and high in test result accuracy.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a simple and quick test method for rotatability. Background technique [0002] With the development of science and technology, spinning has become a common plastic forming technology in machinery manufacturing, and its application fields are becoming more and more extensive. At present, it has involved many fields such as aviation, aerospace, automobile, nuclear industry, heavy machinery, and pressure vessels. [0003] Spinability refers to the maximum ability of metal materials to withstand strong spinning deformation without cracking. For spinning process technicians, the spinnability of the processed material is an indispensable and important basic data before the implementation of the spinning process. [0004] At present, the conventional test methods for the spinability of metal materials include cone die test, ellipsoid die test, wedge feed test, and successive feed test. The main ...

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Problems solved by technology

[0004] At present, the conventional test methods for the spinability of metal materials include cone die test, ellipsoid die test, wedge feed test, and successive feed test. The main shortcomings are as follows: (1) Cone die test needs to configure a set of cone angles Different molds are tested one by one, the operation is more cumbersome, and the test cost is also higher; (2) The ellipsoid mold test needs to measure the wall thickness at the rupture point after the part is rotated (secondary measurement), and then use the formula The conversion gives the rotatability of the metal material, and the accuracy of the wall thickness measurement has a great influence on the test results; (3) The selected value of the wedging angle in the wedging feed test method has a great influence on the test results. The gap between the flat rotating wheel and the mandrel to prevent the metal material from bulging also has a certain influence on the spinability test results; (4) The results of the successive feed test method are generally greater than the results of one spinning test. The test process There are many influencing factors and the operation is more cumbersome

[0005] Patent 201310692486.5 A Numerical Method for Analyzing Spinability of Power Spinning Discloses a Numerical Simulation Analysis and Calculation Method of Spinability. It conducts a detailed analysis of the construction method of the three-dimensional model of the spinner and the mandrel in the finite element simulation and the selection process of the process parameters. In this paper, a detailed explanation is given, and the calculation formula of the numerical analysis of the rotatability is given, which belongs to the theoretical level of the rotatability calculation, and has little reference significance for the actual test of the rotatability, and there are often errors in practical applications.

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