Single-arm active winding and unwinding machine

Abstract

The invention discloses a single-arm active winding and unwinding machine. An expansion and compression mechanism of the winding and unwinding machine comprises a sliding bearing housing. The external part of the sliding bearing housing is connected with tensioning shoes through tensioning connecting rods. A bidirectional thrust bearing, a first compression spring and a limiting part which are sheathed on a pull rod are arranged in the sliding bearing housing from the internal end to the external end. A first shaft shoulder is arranged on the pull rod. The first compression spring is clamped between the limiting part and the first shaft shoulder of the pull rod. A force applying structure used for outwards pushing the bidirectional thrust bearing is arranged on the pull rod. The inner ring of the bidirectional thrust bearing is installed on a first inner ring sleeve. The first inner ring sleeve can be sheathed on the pull rod in a way that the first inner ring sleeve can outwards slide along the axial direction of the pull rod. The first inner ring sleeve is arranged within the exterior outer ring of the bidirectional thrust bearing and is provided with a second shaft shoulder which is used for inwards and tightly pressing the inner ring of the bidirectional thrust bearing. The first compression spring directly or indirectly applies elastic force onto the external end surface of the first inner ring sleeve. The single-arm active winding and unwinding machine has the advantage that the tensioning force applied to the internal side of a steel band roll can be always kept.

Description

technical field [0001] The invention belongs to the unwinding field of metal strips, belongs to the B21C47 group of the IPC classification number, and can also be used in the unwinding fields of industries such as textiles, printing and dyeing, papermaking, and plastics, and particularly relates to a single-arm active unwinding and unwinding machine. Background technique [0002] At present, with the rapid development of the flux-cored wire industry, flux-cored wire manufacturers pay more and more attention to reducing the auxiliary time of equipment operation in order to improve production efficiency. Among them, reducing the time and replacement frequency required for each replacement of steel coils is one of the important means. Therefore, in recent years, there has emerged the use of skeletonless precision rewinding steel strip coils for unwinding. This steel strip coil can directly use the steel strip itself to form a steel strip coil. When all the steel strips are rele...

AI Technical Summary

Problems solved by technology

However, for a horizontal unwinding / rewinding machine, it is easy to cause the material roll to fly out or the material roll to scatter due to the tension during winding / unwinding or the rotational vibration of the machine. It is impossible to restore the raw materials to their original state, so this will cause serious safety accidents or lead to serious waste of raw materials

[0008] But if the air cylinder / hydraulic cylinder with self-locking function is simply applied to the field of unwinding / rewinding machine, there will be the following problems: 1. The self-locking of air cylinder / hydraulic cylinder is only to keep the position of the action lever still, and There is no guarantee that a continuous force can be provided so that the expansion shoe has enough tension to expand the inner side of the material roll, but only to meet the expansion shoe will not retract, the distance between the expansion shoe and the inner side of the material roll is only Simple active support force rather than active expansion force, so that it is actually not tight. For example, the I-wheel retractable and unwinding machine disclosed in patent application 201010138295.0 does not use self-locking cylinder to tighten the I-wheel; 2 、If the inner diameter of the material roll is not completely uniform, and the inner diameter is slightly too small, it will cause the piston of the self-locking cylinder / hydraulic cylinder to fail to fully move in place, and the self-locking device cannot be activated. If the inner diameter is slightly too large, it will cause the self-locking cylinder / hydraulic cylinder After the piston of the hydraulic cylinder is fully in place, the self-locking device is activated, and the expansion shoe cannot tighten the inner side of the material roll, and the self-locking cylinder / hydraulic cylinder still cannot be used.

[0009] Therefore, applying self-locking cylinders / hydraulic cylinders to the field of unwinding / winding machines to avoid the impact of air leakage or liquid leakage on the safety and reliability of machine operation has always been a problem that technicians in the art are eager to solve but have not been successful. question

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