Bilateral shear frame jacking method

Abstract

The invention discloses a jacking method of a rack of double-sided shears. The jacking method comprises the following steps of (1) determining the full load weight and the unbalanced centre-of-gravity position of the rack under the condition that components on the rack are not dismantled; (2) determining jacking devices for jacking the rack; (3) manufacturing a jacking tool and assisting contour blocks; (4) placing a sufficient number of jacking devices at the reasonable jacking positions in a jacking area of the double-sided shears; and (5) progressively increasing the height of the rack with the aid of the assisting high-equivalent blocks so as to jack the rack to the required height during the repeated station switching jacking of all the jacking devices, on the contrary, progressively reducing the height of the rack with the aid of the assisting high-equivalent blocks to complete falling and resetting of the rack during the repeated station switching jacking of all the jacking devices. According to the jacking method, rack jacking is completed reasonably and safely under the condition that components on the rack are not required to be dismantled, so that not only is the working intensity of maintainers reduced, but also the maintaining efficiency is improved, and smooth production is ensured.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for jacking up double-sided shear racks. Background technique [0002] The double shearing equipment used in the finishing area in the plate rolling process includes a lower shearing table and a frame that can move horizontally reciprocating and laterally relative to the lower shearing table through a traversing mechanism. In the prior art, when it is necessary to repair and replace the screw rod, nut and / or track slide plate of the traversing mechanism, the entire frame needs to be lifted to a height of 460mm, and the frame is usually equipped with a jack platform, a worm gear pair, etc. , pinch rollers, eccentric shafts, upper shearing machines and other equipment, the cumulative weight of these equipment is more than 70 tons, and because of the design of the eccentric shaft, the center of gravity of the entire frame is eccentric. Therefore, applying...

AI Technical Summary

Problems solved by technology

Therefore, applying the previous traditional working methods is: combining figure 1 and 2 , first remove the jack platform (102) → worm gear pair → pinch roller → eccentric shaft (103) → upper shearing machine (104) and other auxiliary equipment on the frame (1) step by step, leaving only the frame body (101) , and then use the hydraulic jack to lift the frame body to complete the replacement of the screw rod, nut and / or track slide plate of the traversing mechanism. Finally, after the replacement is completed, all the disassembled auxiliary equipment must be returned. It takes about 5-6 days to work back and forth, which not only reduces the work efficiency and affects the smooth production, but also increases the operation difficulty and workload of the maintenance workers, and a large number of disassembly and assembly work will inevitably affect personnel and Safety and reliability of equipment

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