Method for continuously machining rectangular tensile samples of different specifications at four stations

Abstract

The invention discloses a method for continuously machining rectangular tensile samples of different specifications at four stations. The method comprises the steps of (1) extracting sample machining variables; (2) assigning values to the single-side machining allowance, the feeding times, the actual feeding step pitch and the cutter deviation value of the sample, and performing full-process continuous machining of the rectangular tensile samples with different specifications according to the actual contour feed of the sample; and (3) after continuous machining of the sample is completed, assigning values to the precision compensation variables of the to-be-compensated sample, and executing precision compensation operation of the rectangular tensile sample at the to-be-compensated station. The non-maneuvering time of a machine tool in the machining process is effectively saved, and the working efficiency is improved; and meanwhile, directional precision control can be conducted on the sample in the machining process, and the problems of precision errors caused by tool abrasion, material cutting performance and other factors and deviation of the axes of the two heads and the parallel part of the sample are solved. The method is easy to operate, the continuous machining process is stable. The method has important practical significance for relieving labor intensity, shortening the machining process, reducing tool consumption, achieving unattended operation and the like.

Description

technical field [0001] The invention belongs to the technical field of tensile testing of metal materials. Background technique [0002] Tensile test is the most widely used experiment to detect and evaluate the mechanical properties of metal materials. The processing quality and efficiency of samples often become the key factors and basic prerequisites for timely and accurate test data. [0003] Single-station fixtures are used to process rectangular tensile samples. The general processing method is to classify the materials according to the sample processing specifications, and process each specification into a sample blank with the same length and width by sawing and milling. A certain number of sample blanks are stacked and clamped on the fixture of the CNC machine tool, and the contours are processed batch by batch by layered milling. The processing flow is to clamp the sample blank, start the program to complete the processing, measure the accuracy of the sample, and ...

AI Technical Summary

Problems solved by technology

The first impact is that the machining accuracy of the sample is in an uncontrolled state

The second is that single-station processing, loading and unloading samples, start-up procedures, and process measurement are frequent, which increases the non-motorized time of the CNC machine tool, making the performance of the machine tool not fully utilized, and taking up personnel time and is not conducive to realizing unattended; The third is that the replacement frequency of the tool is high under normal wear and tear, which increases the cost consumption

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