Plunger type coiler mandrel

Abstract

The invention relates to a plunger type coiler mandrel, which is used for solving the technical problem in the prior art that the plunger type mandrel is short in service life. According to the plunger type coiler mandrel disclosed by the invention, a blind hole is formed in the center of the top of a first plunger body, the blind hole is internally provided with an elastic mechanism, the top surface of the elastic mechanism is a certain distance higher than the top surface of the first plunger body under the condition that only the deadweight of a sector-shaped plate is born, and the elastic mechanism is in contact with the bottom surface of the sector-shaped plate; and a second plunger body is further arranged between the sector-shaped plate and a pull rod, a first key which is arranged in a first flat groove of the sector-shaped plate and has a T-shaped cross section is arranged at the top of the second plunger body, a second key which is arranged inside an inclined groove of a second wedge convex block, can slide along the bottom surface of the inclined groove and has a T-shaped cross section is arranged at the bottom of the second plunger body, and a certain distance is formed between the top surface of the first key and the bottom surface of the first flat groove of the sector-shaped plate. The abrasion and deformation of the first plunger body and the newly and additionally arranged second plunger body are little, so that the service life of the plunger type coiler mandrel is prolonged.

Description

technical field [0001] The invention relates to a plunger type coiler drum. Background technique [0002] The existing plunger-type coiler reel includes a hollow shaft, a tie rod that fits with the inner hole of the hollow shaft, a fan-shaped plate located on the outer wall around the hollow shaft, passing through a plunger hole located on the outer wall of the hollow shaft, and located between the fan-shaped plate and the outer wall of the hollow shaft. The plunger body between the tie rods. The pull rod is formed by sequentially connecting several sections of oblique wedge protruding blocks, and each oblique wedge protruding block includes four symmetrical oblique sides along the axis of the reel. The plunger body is a solid cylinder made of copper integrally, its bottom surface is an inclined surface, supported on the inclined side surface of the wedge protruding block, and its top surface supports the bottom surface of the fan-shaped plate. The two ends on the top of t...

AI Technical Summary

Problems solved by technology

Since the plunger body is rigid, the impact force on the plunger body will cause great wear on the top surface of the plunger body, and cause severe deformation of the plunger body, shortening the life of the hot-rolled reel. service life

In addition, the springs pressing the two ends of the fan-shaped plate are prone to fatigue and fracture during the repeated expansion and contraction of the reel.

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