Control method for bar stock saw cutting self-adapting precision baiting

Abstract

The method comprises: using a bar stock saw automatically-adaptive lay- off system. The method comprises: a horizontal AC servo drive system is used for realizing the rod feed; a highly-accurate photoelectric encoder is used to detect the amount of fed rod; a grating shifting sensor is used to detect the height value of front end of the rod; a vertical AC servo drive system is used to adjust the height of the rear end of the rod to keep the consistency between the front end and the rear end of the rod; a highly-accurate weight sensor is used to weigh the actual weight G of the rod and to compare the actual weight of rod with the reset value, and according to the difference Delta G to adjust the cutting length.

Description

technical field [0001] The invention relates to a control method for sawing and blanking processing of metal materials, in particular to a control method for self-adaptive precision blanking of metal bar material sawing. Background technique [0002] Precise hot die forging of round steel or rounded square steel is used to form parts, especially for bars with a diameter of 100-150 mm or more. Precise blanking is an important condition and premise for precision forming. At present, sawing is often used at home and abroad to achieve equal-weight blanking. Due to the high dimensional accuracy of the bar used abroad, equal-length blanking can basically meet the use requirements; there are also domestic methods that measure the diameter of the bar and control it. The method of bar length is used to solve the problem of large differences in cross-sectional shape and size of domestically produced bars, and to achieve equal weight blanking. However, for the large bending degree of d...

AI Technical Summary

Problems solved by technology

At present, sawing is often used at home and abroad to achieve equal-weight blanking. Due to the high dimensional accuracy of the bar used abroad, equal-length blanking can basically meet the use requirements; there are also domestic methods that measure the diameter of the bar and control it. The method of bar length is used to solve the problem of large differences in cross-sectional shape and size of domestically produced bars, and to achieve equal weight blanking. However, for the large bending degree of domestically used bars, this method does not control the bar The bending device and the corresponding method, because the height of the feeding roller is constant, the section of the bar after sawing is not perpendicular to the bar, the actual weight error of the bar after blanking is relatively large, and the actual blanking accuracy is far below As far as the target of this method is 5-6 times higher than the precision of equal-length blanking, the actual use effect is not good, and it is difficult to meet the precision forming requirements

[0003] With the improvement of domestic bar processing technology, the cross-sectional shape and dimensional accuracy of the domestic bar currently used have been greatly improved, and equal-length cutting can basically meet the requirements of use, but because the bar is relatively long, it is generally 6 meters long. Left and right, the weight can reach 600-1500 kg, and the bending degree of the bar is still relatively large during production, loading and unloading, and transportation; although the length of the blank is generally less than 0.4 meters, the cut bar The bending degree of the material is relatively small, but when the long bar is hoisted on the feeding transmission mechanism of the sawing machine, and the front end of the bar is clamped by the feeding chuck, usually the two ends of the bar face down, and the middle bending section is in the above, so that the height of the front end of the bar during the whole blanking process is inconsistent with the height of the feeding chuck, and the place close to the outside of the feeding chuck is the sawing place. In fact, there are still long bars after sawing. The cross section of the bar is not perpendicular to the bar, and the actual weight error of the bar after blanking is relatively large

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