Method for detecting edge of slab cut by flame cutting machine

Abstract

The invention discloses a detection method of cutting edge portion of plate blank by flame cutter; the method comprises the following steps: triggering a roller bed grating, sending the plate blank into a cutter area, triggering two laser detector gratings, i.e., a first grating and a second grating; measuring an edge distance of the plate blank; storing traveled distance set values D1 and D2 of a first cutting torch and a second cutting torch; moving the roller bed at a low positioning speed when triggering a third grating; lifting up a length measuring wheel to contact with the lower surface of the plate blank after triggering a fourth grating, wherein the length measuring wheel is driven to rotate; starting to count by a roller bed electric motor encoder of the length measuring wheel after triggering a fifth grating, calculating the length of the plate blank passing through the fifth grating by a PLC, and positioning the plate blank; automatically positioning the plate blank cutting device; moving each cutting torch to the edge of the plate blank according to the set values; opening the pre-heating oxygen of each cutting torch, starting to pre-heat the edge portion; opening the cutting oxygen of each cutting torch after being pre-heated for a certain time, so as to start cutting the plate blank; and ending the cutting when the two cutting torches meet with each other. The method increases the precision of detecting the edge portion of the plate blank, and improves the edge pre-heating effect of the edge portion.

Description

technical field [0001] The invention relates to a method for detecting the cutting process of a plate, in particular to a method for detecting the edge of a slab cut by a flame cutting machine. Background technique [0002] Flame cutting machine is the main equipment for two-tangent flame cutting of thick plate, which is used to cut the straightened billet into the required length. The composition of the thick plate two tangent flame cutting machine currently used for thick plates is as follows: figure 1 As shown, it consists of two cutting carts, that is, cutting cart 1 and cutting cart 2, wherein each cutting cart is equipped with two cutting torches 1a, 1b, and a single cart 1, 2 can carry out cutting on the slab 3 All two cuts can also be carried out by two carts 1 and 2 together to carry out all three cuts to the slab 3 . The cutting machine body is composed of cutting machine water-cooled car body, traveling transmission device, torch trolley walking upper and lower ...

AI Technical Summary

Problems solved by technology

If there is a problem of continuous edge cutting, the operator needs to manually start the cutting gun to make up the edge to completely cut off the slab, which will affect the production and logistics speed

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