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Coiling mandrel and relative procedure for monitoring condition thereof

A movement and mandrel technology, applied in metal processing equipment, metal processing, manufacturing tools, etc., can solve problems such as component failures

Active Publication Date: 2021-02-19
DANIELI & C OFF MEC SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These phenomena can lead to the formation of cracks in the outer casing of the segment or morphological changes in the internal components, which can build up over time until the component fails during service
Alternatively, they require the manufacturer to replace them early, paying all associated costs

Method used

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  • Coiling mandrel and relative procedure for monitoring condition thereof
  • Coiling mandrel and relative procedure for monitoring condition thereof
  • Coiling mandrel and relative procedure for monitoring condition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] figure 1 A longitudinal section of a coiler shaft according to the prior art is shown. A conventional mandrel 2 (see for example US3658274) is made by a system of radially expandable segments 4 due to the fact that a wedge 6 coupled to the action of a tapered shaft 8 relative to the mandrel axial direction along arrow a Move, increasing or decreasing the mutual distance between segments and axes. The mandrel 2 is supported by bearings 10 supported by a frame 12 . figure 1 The resulting slip ratio (arrow a) between the shaft and the wedge / segment is shown.

[0067] figure 2 shown figure 1 A cross-sectional view along the line II-II, which shows a prior art coiler mandrel, which allows us to understand how the mandrel 2 unfolds or folds according to the different steps of the coiling process. Region A shows segment 4 fully expanded, region B shows segment 4 intermediate transition unfolded, and region C shows segment 4 in a fully collapsed configuration. Shape 1...

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PUM

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Abstract

The present invention refers to a cooling control system of a coiling mandrel (102; 202; 302; 402; 502; 602) for metal products which comprises: an internal shaft (108; 308) with a plurality of sectors (109); an external drum which as a whole contains coaxially said internal shaft and which is circumferentially subdivided into a plurality of segments (104) arranged in a direct or indirect couplingconnection with said sectors; and an internal and / or external cooling system of the mandrel. The segments are movable in a radial direction with respect to said internal shaft through an axial movement of the latter, causing the consequent radial expansion or collapse of the drum. The mandrel is further provided with a group of temperature detection sensors (130, 132, 134, 136; 234, 236; 332, 336; 43N; 53N; 63N; 3N). A method for monitoring and adjusting the temperature of a coiling mandrel is also described.

Description

technical field [0001] The invention relates to a cooling control system for a coiler shaft with internal cooling and / or external cooling located downstream of a hot rolling mill. [0002] At the heart of the concept is the coiler mandrel for the metal products coming out of the hot rolling mill, consisting of: [0003] (a) an inner shaft with multiple sectors; [0004] (b) an outer drum, which as a whole contains said inner shaft coaxially, and is subdivided circumferentially into sections connected by direct or indirect coupling to said sectors, wherein , the indirect coupling connection is realized by a wedge connected to any one of the sectors and inserted between the segment and the sector; [0005] (c) internal and / or external cooling systems for the mandrel; [0006] wherein, due to the direct or indirect coupling between the segments of the drum and the sectors of the inner shaft, said segments can be displaced radially relative to said inner shaft by the axial move...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C47/30B21C51/00B65H75/24
CPCB21C47/30B21C51/00B65H75/2484B65H75/248
Inventor A·多纳登A·盖勒M·法尔科梅尔K·希兰M·赞科
Owner DANIELI & C OFF MEC SPA