RU2323826C2 - Arbor for continuous pipe winding - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: arbor for continuous pipe winding consists of shaft and segment planking. Shaft is made either all-in-one-piece, or with rigidly secured to it two or more symmetrically assembled segment planks. The rest of segment planks are enclosed between the end planks and are able to move reciprocally.

EFFECT: arbor is of a simple design and of a high reliability.

2 cl, 5 dwg

Description

The invention relates to tooling for the manufacture of pipes.

Known mandrel for the continuous winding of pipes containing a shaft and sector strips, SU a.s 1353645, A1 B29C 53/82, B29K 105: 08, B29L 23:22.

According to its features and the achieved result, this mandrel is the closest to the claimed and adopted as a prototype.

This mandrel has sector planks made with longitudinal guide grooves and is mounted by them on the shaft by means of balls in cages; sector bars by means of cams of the copier during rotation of the mandrel are moved back and forth.

The disadvantage of this mandrel is the complexity of the design and low reliability.

The complexity of the mandrel design is explained by the implementation of all sector strips forming a winding surface, with the possibility of reciprocating movement, which, in turn, leads to a reduced shaft diameter, insufficient rigidity of the mandrel as a whole, and explains the low reliability of the mandrel.

The objective of the invention is to simplify the design and increase the reliability of the mandrel.

This problem is solved by improving the mandrel for the continuous winding of pipes containing a shaft and sector slats.

The improvement consists in the fact that the shaft is made in one piece or with two or more symmetrically located sector planks fixedly attached to it, and the remaining sector planks are located between the latter with the possibility of reciprocating movement; sector slats fixed to the shaft are made in the form of consoles fastened to the central shaft by separate central guide elements.

The execution of the shaft in one piece or with two or more symmetrically located sector strips fixedly attached to it allows, for example, up to 20% of the total number of sector strips to be made stationary, and to significantly increase the stiffness of the shaft.

The location of the remaining sector planks between sector planks, made in one piece with the shaft or fixedly attached to it, can significantly increase the rigidity of the mandrel as a whole.

The implementation of the mandrel according to the invention can significantly simplify its design and increase reliability.

The implementation of fixedly fastened to the shaft sector strips in the form of consoles, motionlessly fastened to the axial shaft separate central guide elements, simplifies the design and improves the reliability of the mandrel while reducing its weight.

Below, with reference to the accompanying drawings, where shown in:

figure 1 - a mandrel with a shaft and sector strips made in one piece;

figure 2 - section aa;

figure 3 - a mandrel with fixedly fixed to the shaft sector strips in the form of consoles;

4 is a section bB;

figure 5 - section bb,

A description of the proposed mandrel.

The mandrel for continuous winding of pipes contains a shaft 1 and sector bars. The shaft 1 is made in one piece with two or more (1, 2 shown with two) symmetrically arranged sector strips 2 or with symmetrically located sector strips 3 fixedly attached to it (3, shown in figure 4, 5) (which allows, for example, up to a quarter of sector slats to be executed without communication with a reciprocating drive and significantly increasing the stiffness of the shaft), the remaining sector planks 4 are located between the latter with the possibility of reciprocating movement (which allows significantly Jelic mandrel rigidity as a whole).

In the embodiment of the mandrel, sector strips 3 fixedly fixed to the shaft 1 are made in the form of consoles fastened to the central axis 1 coaxial with the shaft 1 by separate central guiding elements 5 (which provides an increase in the rigidity of the mandrel while reducing its mass).

Sector strips 4 are mounted on the shaft 1 and the guide elements 5 with the possibility of reciprocating movement through one of the known designs, for example, with rings 6, 7, mounted on the ledges of the sector strips 2 or 3 of the mandrel.

Sector strips 2, 4 and 3, 4 can be made with peripheral (winding) surfaces of different sizes.

During the operation of the proposed mandrel on each of its revolutions, for example, a cam drive (not shown) acts on the drive rollers 8 of the sector planks 4 from the condition, for example, simultaneously moving all or most of the sector planks 4 forward and alternately moving the minority of the sector planks 4 back (due to what is the continuous movement of the winding pipe on the mandrel forward).

The mandrel for continuous winding of pipes according to the invention is characterized in comparison with the prototype greater simplicity of design and increased reliability.

Claims (2)

1. Mandrel for the continuous winding of pipes containing a shaft and sector slats, characterized in that the shaft is made in one piece or with two or more symmetrically located sector strips fixedly attached to it, and the remaining sector strips are located between the latter with the possibility of reciprocating movement . 2. The mandrel according to claim 1, characterized in that the sector planks fixedly attached to the shaft are made in the form of consoles fixed to the shaft by separate central guide elements.

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