A band hot rolling coiling machine, cold rolling feed reel scroll double stroke bulge contract cylinder

Abstract

The invention relates to a design of a winding shaft double stroke expansible cylinder device of a band hot rolling coiling machine and a cold rolling uncoiling machine, and consists of a revolving cylinder (1) and an expansible cylinder (3). Three oil lines are designed in the device and three hydraulic fluid chambers are arranged in the device, the areas of sections of a big piston and a small piston are different to form the double stroke, at the initial position a piston rod (7) which is positioned at the small piston (5) drives a draw rod inside a coiling block to keep the diameter of the coiling block at a minimum closing state, if the first diameter expanding is carried out, the oil lines 1 and 3 are filled with oil, the oil is fed into the cavities A and C of the revolving cylinder, the cavity B returns the oil through the oil line 2, the small piston moves a stroke L to stop by holding against the big piston (4), the piston draws the draw rod inside the coiling block to move the stroke L, and the first expanding diameter is finished; the process of the second expanding diameter comprises that the cavity C of the revolving cylinder is filled with the oil, the A and B cavities return the oil, the small piston and the big piston move a stroke L1 at the same time, the piston rod also moves the stroke L1 to finish the second expanding diameter; while the diameter is reduced, the cavities A and B of the revolving cylinder are filled with the oil, the cavity C returns the oil, the big piston and the small piston respectively move to the initial position to stop, to finish the expanding diameter.

Description

technical field [0001] The invention belongs to the technical field of decoiling and coiling devices for plate and strip rolling mills, and in particular relates to a double-stroke expansion and contraction cylinder device for coils of a strip hot rolling coiler and a cold rolling decoiler. Background technique [0002] During the coiling process of the strip hot-rolled coiler, due to the cold shrinkage of the strip as the temperature drops, gaps will appear between the coil layers, which will cause slippage and seriously affect the surface quality of the strip; the original hot-rolled coil The expansion and contraction oil cylinder of the machine reel is a first-level expansion and contraction, which cannot solve this problem. [0003] In the process of strip cold rolling and rolling, due to the different specifications of incoming materials, it is often necessary to have a cold rolling decoiler that can adapt to a variety of different specifications of strip coils, especia...

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Problems solved by technology

[0002] During the coiling process of the strip hot-rolled coiler, due to the cold shrinkage of the strip as the temperature drops, gaps will appear between the coil layers, which will cause slippage and seriously affect the surface quality of the strip; the original hot-rolled coil The expansion and contraction oil cylinder of the machine reel is a first-level expansion and contraction, which cannot solve this problem

[0003] In the process of strip cold rolling and rolling, due to the different specifications of incoming materials, it is often necessary to have a cold rolling decoiler that can adapt to a variety of different specifications of strip coils, especially coils with different inner diameters. The reel expansion and contraction oil cylinder of the rolling uncoiler is one-stage expansion and contraction, which also cannot solve this problem

[0004] The above two types of expansion and contraction cylinders only have two oil circuits, one for oil inlet, one for oil return, and one for piston, which can only achieve one expansion diameter

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