Automatic accurate positioning method for large workpiece

Abstract

The invention discloses an automatic accurate positioning method for a large workpiece. The automatic accurate positioning method is applicable to a large workpiece to be machined which has the following characteristics: the workpiece is rectangular and possibly has deviations on the contour dimensions of length, width and height, a positioning reference vertical surface is arranged on the top of the workpiece, and the workpiece needs to be moved and positioned in the horizontal plane. The automatic accurate positioning method comprises the following steps: (1), the workpiece is horizontally conveyed to a reference position in the axial direction by a roller way; (2), the radial position of the workpiece is subjected to preliminary positioning through a servo electric push rod; (3), the position deviation is measured, aiming at the positioning reference vertical surface; and (4), the servo electric push rod finishes accurate positioning according to the preliminary positioning parameters and the measured position deviation. The automatic accurate positioning requirement on the large workpiece in the machining process can be accurately and rapidly realized through the construction technique provided by the invention, the machining speed is effectively accelerated, the machining quality is ensured, the project safety is guaranteed, and the economic cost is reduced.

Description

technical field [0001] The invention relates to a method for precise positioning of large workpieces, which can perfectly solve the need in industrial processing for large-scale workpieces that may have a cuboid shape, length, width, and height. The problem of precise positioning of workpieces. Background technique [0002] In the carbon paste tamping process to realize the automatic assembly of electrolytic aluminum cathode carbon blocks, it is necessary to use pneumatic tools to tamp and compact the cathode paste filled in the gap between the carbon tank and the steel rod. The consistent tightness of rolling directly affects the quality of the entire assembly block. The cathode carbon block is a kind of cuboid shape, length, width, and height dimensions (reference value: 3260×520×480, weight: 1550kg), which may have deviations. The top-middle part of the workpiece is positioned with reference to the vertical plane and needs to be in the horizontal plane. Large workpieces...

AI Technical Summary

Problems solved by technology

The general mechanical positioning method is difficult to meet the requirements of automatic and accurate positioning. In the past, most of the manual operations of "measurement ←→ correcting the workpiece position" were used to complete the positioning manually.

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