Method for aligning rod bundle checkout sample

Abstract

The invention provides a straightening process of bull rod test sample, which includes the following steps: at first straightening holding parts on double ends of the bull rod test sample and holding it in one central line as much as possible, then fastening the holding parts on double ends of the bull rod test sample tightly on the stretching equipment, loading and stretching, decelerating tension speed when approach to flat, stopping loading as soon as the test sample is straightening, controlling the loaded load below the yield load of the test sample strictly. Using the straightening method, can overcome the defects existing in the bull rod test sample straightening process, the straightening effect is good, straightening efficiency is high, and the method has little affects on the performance of the test sample.

Description

technical field [0001] The invention belongs to the field of physical and chemical testing, in particular to a method for straightening test samples of wire rods. Background technique [0002] When inspecting hot-rolled wire rods, cold-drawn wire rods, and cold-rolled wire rods, it is often necessary to straighten the wire rod samples before inspection, such as wire rod tensile samples that need to measure elongation, wire rod cold bending Test specimens, wire rod weighing specimens for weight per meter, etc. must be straightened. At present, the methods for straightening wire rod samples mainly include wooden hammer straightening method and press straightening method. [0003] The wooden hammer straightening method is to manually use a wooden hammer to knock the wire rod sample straight. The shortcoming of this straightening method is: (1) can only straighten the wire rod sample of smaller diameter, and when the sample is larger in diameter and higher in strength, the str...

AI Technical Summary

Problems solved by technology

The shortcoming of this straightening method is: (1) can only straighten the wire rod sample of smaller diameter, and when the sample is larger in diameter and higher in strength, the strength of using people can no longer knock the sample straight; ( 2) The labor intensity is high, and it is completely manual to straighten. When the number of samples is large, it is very laborious and laborious; (3) It has a great impact on the performance of the sample, and straightening will cause uneven deformation and excessive local deformation , which affects the performance of the sample; (4) The straightening effect is not good, and the straightness of the sample after straightening is often poor

[0004] The press straightening method is to use various presses to gradually press and straighten the wire rod sample. The disadvantages of this straightening method are: (1) low efficiency, and the operator needs to partly and partly straighten the wire rod on the press. The sample is straightened; (2) The straightening effect is not good, and the straightness of the sample after straightening is poor

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