Hydraulic expander for repairing steel coil core

Abstract

The invention relates to a hydraulic expander for repairing a steel coil core. The hydraulic expander comprises an L-shaped outer tongs arm (1), wherein an end part of the outer tongs arm is connected with an inner tongs arm (3) through a pivot (2), the outer tongs arm (1) and the inner tongs arm (3) are arranged oppositely, the outer tongs arm (1) is provided with a shaft hole (1a) which is internally provided with an oil cylinder (4), and a piston (5) of the oil cylinder is supported against an upper end face of the inner tongs arm (3). The outer tongs arm is 350mm in length and 80mm in width, and the inner tongs arm is 345mm in length and 40mm in width. The maximal expansion angle between the inner and outer tongs arms is 32 degrees. The hydraulic expander disclosed by the invention is more labor-saving when being applied to taking cores of horizontal defected silicon steel coils, and has the advantages of reducing unsafe factors that an operator falls due to improper force application and the like, preventing pressing marks generated after crowbar pulling in the traditional treatment manner, and simultaneously improving the field production efficiency.

Description

technical field [0001] The invention relates to a hydraulic expander, in particular to a hydraulic expander suitable for repairing steel coil cores. The utility model belongs to the technical field of auxiliary equipment for repairing steel coils. Background technique [0002] Silicon steel vertical steel coils have irregular coil cores, and these defective coil cores need to be cut off before processing the steel coils. Also do not have special tool to be used for taking out coil core at present. The prior art adopts the method of prying with a crowbar. When taking out the vertical defect roll of silicon steel, three to four people are needed to pry out the waste roll core bit by bit from the inner diameter with a crowbar diagonally. This method of inserting a crowbar into the inner ring to take out the core has the following defects: [0003] 1) In the process of prying, if the operation is not done properly, there will be potential safety hazards and quality problems, ...

AI Technical Summary

Problems solved by technology

[0003] 1) In the process of prying, if the operation is improper, there will be safety hazards and quality problems, and the crowbar will easily slip, causing the operator to fall and bruise

[0004] 2) The operation is difficult, time-consuming, low-efficiency, high-intensity, and the operation time in high-temperature areas is not easy to be too long, and the physical strength of the operators is poor. Repairing 3-4 rolls a day cannot meet the production demand and affect production efficiency.

[0005] 3) In the process of prying out the inner core of the steel coil, the crowbar is easy to damage the inner diameter of several circles of steel plates, causing a lot of waste and increasing the production cost

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