Method for machining frame of cold continuous rolling mill

Abstract

The invention discloses a method for machining a frame of a cold continuous rolling mill. A main body of the frame is a rectangle of which the middle part is provided with a window, and one end of the main body is provided with a bed plate. The method comprises the following steps of: 1), flatly placing the two sides of the frame on an operating platform to finish machining a window position and a bed plate position; and 2), overturning the frame by 90 DEG around the central line of the frame, laterally erecting, bearing a bearing reference plane by using a square box, turning the side face of the frame which is laterally erected according to the position data in the step 1), and tightly clamping and fixing the frame to finish machining two large side faces of the frame. By the method, the two large side faces of the frame are machined in a lateral erection mode, are positioned in a vertical free state when the frame is subjected to position adjustment and is machined, and are machined without the influence of gravity and a bearer, so that the parallelism accuracy of the two large side faces of the frame is ensured.

Description

technical field [0001] The invention relates to a processing method of a rolling mill stand, in particular to a processing method of a cold continuous rolling mill stand. Background technique [0002] The stand height of large-scale cold rolling mill can reach about 10m, the thickness can reach about 600mm, the length can reach about 2-3m, and the weight can reach about 100 tons. The shape, size requirements and the perpendicularity of the bottom surface of the anchor plate to the center line of the window and the verticality precision requirements of the bottom surface of the anchor plate to the outer surface of the frame are relatively high. At present, the machining method of large-scale cold tandem mill racks is as follows: place the large surfaces on both sides of the rack horizontally on the workbench of gantry milling, and use gantry milling to process. The machining accuracy of the window parts can usually meet the design requirements, and the base plate The vertica...

AI Technical Summary

Problems solved by technology

At present, the machining method of large-scale cold tandem rolling mill racks is as follows: place the large surfaces on both sides of the rack horizontally on the workbench of gantry milling, and use gantry milling. The machining accuracy of the window parts can usually meet the design requirements, and the base plate The verticality of the relative window and the outer surface of the frame can also meet the design requirements, but the parallelism of the large surfaces on both sides of the frame cannot meet the design requirements. Bending deformation, while the support points are limited, the overall removal allowance is not uniform, and deformation is easy to occur after processing, which affects the parallelism accuracy of the large surfaces on both sides; moreover, due to the precision limitation of the machine tool, the verticality of the bottom surface of the foundation plate relative to the center line of the window The accuracy of the verticality and the verticality of the large faces on both sides of the rack is not high

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