GB2229661A

GB2229661A - Wire straightening machine

Info

Publication number: GB2229661A
Application number: GB9006243A
Authority: GB
Inventors: Wolfgang Lausberg
Original assignee: Carl Ullrich Peddinghaus
Current assignee: Carl Ullrich Peddinghaus
Priority date: 1989-03-30
Filing date: 1990-03-20
Publication date: 1990-10-03
Anticipated expiration: 2010-03-20
Also published as: GB9006243D0; GB2229661B; NL9000538A; ES2027475A6; IT9019852A0; DE3910221A1; IT1240347B; IT9019852A1; CH680987A5; FR2645054B1; FR2645054A1

Description

1 4 WIRE STRAIGHTENING MACHINE This invention relates to a straightening

machine for wire, more particularly steel wire for use in reinforced concrete, which is taken from a coil#, continuously rectified and straightened, and delivered in the form of 'round steel rod for further manipulation and/or use, having at least one inlet die and one outlet die disposed on the working axis and a plurality of straightening dies disposed off the working axis, at least the straightening dies being mounted in a housing which rotates about the working axis. The inlet die and the outlet die usually also rotate. The dies in machines of this type are seamless nozzle-shaped rings of some suitable material, such as hard metal for example. Their aperture diameter corresponds within narrow tolerances to the diameter of the wire to be straightened. In general, straightening machines of this type exert no drawing action which would reduce the wire diameter, though this is not excluded. The wire is not subjected to torsion during the straightening operations. The wire can be passed through under tensile or thrust f orces.

The straightening machine of prior art, as initially described has gained approval on the basis of it's performance as a straightener. The straightening action is imposed in both axes of the coordinate system and the straightened wire is consequently straight within very narrow tolerances. The inlet die, the outlet die and the straightening dies are subjected during the straightening operations to substantial loads in the axial and radial directions alike, because of sliding friction and the resulting abrasive wear. Consequntly# the di e 1 if e i s r ela tiv ely sh or t. When signifigantly worn, the dies must be removed and replaced, with substantial time losses and replacement costs.

The object of the invention is to improve a straightening machine of the type initially described so that the wearing loads are substantially reduced, with respect to the straightening dies and optionally also the inlet and outlet dies, when they also are rotated in the manner described.

According to the present invention, at least the straightening dies are mounted in rolling bearings coaxial with the straightening dies they contain, and the rolling bearings are adapted to take up the axial forces set up as the wire to be straightened passes through them.

The at least one inlet die and the at least one outlet die are also preferably mounted in the rotating housing and are also disposed in rolling bearings.

The accruing advantages are to be seen in that the wear to which the dies in the known machine are subjected as a result of the rotary motion is substantially reduced. Sliding friction in the axial direction and the resulting wearing action are admittedly still experienced, but the wearing action resulting from the rotary motion in the known machine is virtually eliminated.

There are known roller straightening machines, in which a plurality of straightening rolls are disposed eccentrically to the working axis, similarly to the straightening dies. However, they do not rotate about the working axis. In this case, sliding friction is replaced by the less abrasive rolling friction. On the other hand, straightening machines of this type cannot directly bring about straightening action in two mutually perpendicular radial directions.

An embodiment of the invention will now be described purely by way of example, with reference to the accompanying drawings in which:

Figure 1 is a longitudinal section through the relevant parts of a straightening machine in accordance with the invention; Figure la is an enlargement of the detail ringed in Figure 1; Figure 2 is a plan view of part of Figure 1; Figure 3 is a section taken on the line A-B of Figure 1; and Figure 4 is a section taken on the line C-D of Figure The machine illustrated by the drawings is designed for the straightening of wire, more particularly steel wire for use in reinforced concrete, which is taken from a coil (not shown).. continuously rectified and straightened, and delivered in the f orm of round steel rod f or f urther manipulation and/c;r use.

The basic components in the embodiment shown comprise two inlet dies 1, 2, two outlet dies 3, 4 disposed on the working axis and a plurality of straightening dies 5 disposed :I off the working axis. The inlet dies 1, 2r the outlet dies 3, 4 and the straightening dies 5 are mounted in a housing 6 which rotates about the working axis. It is suitably mounted in a machine frame, of which the components 7 form part. Driving means for the housing 6 include Vee belts 8 and a Veebelt pulley 9.

It will be seen that the straightening dies 5 are mounted in rolling bearings 10 coaxial with the straightening dies 5 they severally contain. The rolling bearings 10 are adapted to take up the axial forces set up as the wire to be straightened passes through them.

The second inlet die 2 and the f irst outlet die 3 are likewise mounted in rolling bearings 10, and both the first inlet die 1 and the second outlet die could obviously also be mounted in rolling bearings 10. Figure 3 shows how the bearings are mounted in the housing 6.

Figure 4 clearly shows that between the successive dies 2, 5, 3 there are provided components 11, for the purpose of guiding the wire, more particularly when threading a wire through for straightening.

1

Claims

CLAIMS which is taken 1. A straightening machine for wire, from a coil,

continuously rectified and straigbtenedr and delivered in the form of round steel rod for further manipulation and/or use, the machine having at least one inlet die and at least one outlet die disposed on the working axis and a plurality of straightening dies disposed off the working axis, at least the straightening dies being mounted in a housing which rotates about the working axis, at least the straightening dies also being mounted in rolling bearings coaxial with the straightening dies they contain,, and the rolling bearings being adapted to take up the axial forces set up as the wire to be straightened passes through them.
2. A wire straightening machine as in claim lp wherein the at least one inlet die and-the at least one outlet die are moutned in the rotating housing and are disposed in rolling bearings.
3. A wire straightening machine substantially as hereinbefore described with reference to the accompanying drawings.

Published 1990 at The P..tentCCice.SLatc House. 6671 High Holborn, London WC1R4TP.FUrtherCOPIC5 maybe obtained from The PatentOtfice SaLs Branch, St Mary Cray. Oi pairon. Kent BR5 3RD. Printed by Multiplex techniques ltd. St Mary Or&y. Kent, Con 1187