US 4,920,776 A · Process and apparatus for the intermittent straightening of wire

Abstract

The intermittent straightening of the wire (1) is carried out by means of a fixedly supported straightening rotor (4), the straightening blocks (5, 6, 7) of which radially deflect the wire (1) advanced by conveying mechanism (2). The mass moment of inertia of the straightening rotor (4) is dimensioned to be so small that the straightening rotor (4) can be decelerated and accelerated at least approximately within the same time period as the wire (1) by the conveying mechanism (2). For cutting to length, the straightening rotor (4) is braked in synchronism with the wire (1) and thereafter again accelerated. Thereby, a perfect wire quality is achieved, in particular a uniform elongation approximately constant over the entire length of the wire, without having to move the cutting device at the high wire feeding speed, or without having to move the straightening rotor axially or the straightening blocks radially, in order to avoid heating up and damaging of the arrested wire by the further operating straightening rotor. Different straightening rotors (4) are utilized for different wire types, these rotors being easily exchangeable with their bearings (46).

Claims18

Dependent claims

Process for the intermittent straightening of wire (1) comprising the steps of accelerating the wire (1) to a feeding speed, radially deflecting the wire by a group of straightening blocks (5, 6, 7) of a fixedly mounted straightening rotor (4) while simultaneously rotating the straightening rotor at an angular velocity, decelerating the wire from the feeding speed for a subsequent operation on the wire, and decelerating the rotation of the straightening rotor (4) in synchronism with the decelerating of the wire from the feeding speed prior to the subsequent operation, and thereafter again accelerating the rotation of the straightening rotor.

Apparatus for straightening wire, comprising

conveying means (2) for advancing a wire (1) to be straightened,
a straightening rotor (4) having a longitudinal axis (25), a wire receiving passage therethrough along said longitudinal axis, and a group of wire straightening blocks (5, 6, 7) intersecting said wire receiving passage, and having a small mass moment of inertia, said straightening rotor having an input end and an output end.
support means (46) fixedly supporting said straightening rotor (4) for rotation about said longitudinal axis (25),
operating means (10, 65) connected adjacent the output end of said straightening rotor disposed in alignment with said longitudinal axis (25) adapted for performing an operation on the wire (1) exiting from said output end,
said conveying means (2) disposed along said longitudinal axis (25) and adapted to advance a wire through said wire receiving passage of said straightening rotor from said input end to said output end and to said operating means (10, 65),
driving means (48, 50-52, 54 and 56-58) connected to said conveying means (2) and said straightening rotor (4) and operative to accelerate and decelerate said conveying means (2), and to synchronously accelerate and decelerate rotation of said straightening rotor (4) about said longitudinal axis (25),
a control unit (60) connected to said driving means to operatively control the acceleration and deceleration of said driving means (48, 50-52, 54 and 56-58), and connected to said operation means (10, 65) to activate the latter,
said mass moment of inertia of said straightening rotor (4) being dimensioned so small that the straightening rotor (4) is decelerated and accelerated substantially at the same rate as, and in synchronism with the deceleration and acceleration of said conveying means (2) by said driving means (48, 50-52, 54 and 56-58) when decelerated and accelerated, respectively, and
said control unit (60) being operative to decelerate said driving means prior to each activation of said operating means (10, 65) and to accelerate said driving means after activation of said operating means (10, 65).

6 more elements

Dependencies are inferred from the claim text.

Process and apparatus for the intermittent straightening of wire

Life of this patent

Process and apparatus for the intermittent straightening of wire

Life of this patent

Abstract

Claims18