Pulse current processing apparatus and method for thin metal strip under bidirectional tension

Patent metadata

Field	Value
Publication number	US-12398440-B2
Application number	US-202318162605-A
Country	US
Kind code	B2
Filing date	Jan 31, 2023
Priority date	Jun 13, 2022
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A pulse current processing apparatus includes a bidirectional tension and pulse current application apparatus, a real-time thin metal strip shape detection apparatus and a supporting base. In the apparatus, the tension is applied in the rolling direction and the transverse direction to effectively improve the strip shape flaws of the thin metal strip, and realize the rapid straightening of the thin metal strip; at the same time, the stress status of the thin metal strip is changed by applying the pulse current along the rolling direction or the transverse direction or applying different tensions in two directions; secondly, compared with the conventional heat-preservation heating and annealing apparatus, the pulse current can realize high-efficiency control of mechanical properties of the thin metal strip, and rapidly eliminate the internal stress; further, the strip shape is monitored by the laser ranging to ensure the strip shape consistency of the thin metal strip.

First claim

We claim:

1. A pulse current processing apparatus for a thin metal strip under bidirectional tension, comprising a bidirectional tension and pulse current application apparatus, a real-time thin metal strip shape detection apparatus and a supporting base, wherein the bidirectional tension and pulse current application apparatus is fixed on an upper surface of the supporting base so as to simultaneously apply rolling-direction and transverse tension and pulse current to a thin metal strip; a fixed column in the real-time thin metal strip shape detection apparatus is fixedly connected with the upper surface and a lower surface of the supporting base through bolts; a through hole is formed in the center of the supporting base, the real-time thin metal strip shape detection apparatus comprises a laser ranging array configured for measuring a strip shape of the thin metal strip at the through hole; a sealed cavity is sleeved outside a working region formed by the bidirectional tension and pulse current application apparatus, the real-time thin metal strip shape detection apparatus and the supporting base; and the sealed cavity is filled with nitrogen and helium so as to avoid oxidation of the thin metal strip in the working region.

2. The pulse current processing apparatus for the thin metal strip under bidirectional tension according to claim 1 , wherein the bidirectional tension and pulse current application apparatus comprises a rolling-direction tension and pulse current application apparatus and a transverse tension application apparatus; the rolling-direction tension and pulse current application apparatus applies the rolling-direction tension and the pulse current simultaneously to the thin metal strip; the transverse tension application apparatus applies the transverse tension to the thin metal strip; and the rolling-direction tension and pulse current application apparatus and the transverse tension application apparatus are combined to realize rapid straightening of the thin metal strip;
wherein the rolling-direction tension and pulse current application apparatus comprises rolling-direction tension application units that are arranged symmetrically with respect to each other; each rolling-direction tension application unit comprises a first ball guide-way pair and a first C-shaped chuck frame; a lower surface of the first ball guide-way pair is fixedly connected with the upper surface of the supporting base; a bottom surface of the first C-shaped chuck frame is matched with an upper surface of the first ball guide-way pair to limit a movement track of the first C-shaped chuck frame; an upper arm and a lower arm extending from the first C-shaped chuck frame form an action cavity, and an upper top surface of the action cavity is connected with a fixed end of a first hydraulic cylinder; a moving end of the first hydraulic cylinder is connected with a central hole of an first upper pressure plate through threads so as to push the first upper pressure plate to clamp the thin metal strip through the first hydraulic cylinder; a back surface of the first C-shaped chuck frame is fixedly connected with one end of a first columnar dynamometer, and another end of the first columnar dynamometer is connected with a moving end of a first servo electric cylinder; a fixed end of the first servo electric cylinder is fixed in a horizontal position through a first fixed support; a bottom surface of the first fixed support is fixedly connected with the upper surface of the supporting base so as to pull the first C-shaped chuck frame to apply the rolling-direction tension to the thin metal strip through the first servo electric cylinder; a vertical end of the first fixed support is provided with a linear through hole so as to allow the thin metal strip to pass through; a transfer roll set is fixed on an upper surface of a horizontal end of the first fixed support so as to normally transfer the thin metal strip; the forefront end of the lower arm extending from the first C-shaped chuck frame is provided with an electrode, and the electrode is connected with an external power supply through a lead wire so as to apply the pulse current to the thin metal strip; and an insulating lining plate is arranged between the first ball guide-way pair and the first C-shaped chuck frame, and an insulating connector is arranged between the first columnar dynamometer and the moving end of the first servo electric cylinder so as to avoid leakage of the pulse current; and
wherein the transverse tension application apparatus comprises transverse tension application units that are arranged symmetrically with respect to each other; each transverse tension application unit comprises a second ball guide-way pair and a second C-shaped chuck frame; a lower surface of the second ball guide-way pair is fixedly connected with the upper surface of the supporting base; a bottom surface of the second C-shaped chuck frame is matched with an upper surface of the second ball guide-way pair to limit a movement track of the second C-shaped chuck frame; a bottom surface of an upper arm extending from the second C-shaped chuck frame is connected with a fixed end of a second hydraulic cylinder; a moving end of the second hydraulic cylinder is connected with a central hole of an second upper pressure plate through threads so as to push the second upper pressure plate to clamp the thin metal strip through the hydraulic cylinder; a back surface of the second C-shaped chuck frame is fixedly connected with one end of a second columnar dynamometer, and another end of the second columnar dynamometer is connected with a moving end of a second servo electric cylinder; a fixed end of the second servo electric cylinder is fixed in a horizontal position through a second fixed support; a bottom surface of the second fixed support is fixedly connected with the upper surface of the supporting base so as to pull the second C-shaped chuck frame to apply the transverse tension to the thin metal strip through the second servo electric cylinder; and the bottom surface of the second upper pressure plate and an upper surface of a lower arm extending from the second C-shaped chuck frame are respectively provided with an insulating layer so as to avoid influence of the pulse current flowing through the thin metal strip.

3. The pulse current processing apparatus for the thin metal strip under bidirectional tension according to claim 1 , wherein the real-time thin metal strip shape detection apparatus comprises detection units that are vertically arranged symmetrically with respect to each other; each detection unit comprises a gantry-type electric high-speed sliding platform and the laser ranging array; a movement track of the gantry-type electric high-speed sliding platform is perpendicular to a movement direction of the thin metal strip; the laser ranging array is fixed on a moving beam in the gantry-type electric high-speed sliding platform and perpendicularly points to the thin metal strip so as to detect the strip shape of thin metal strip.

4. The pulse current processing apparatus for the thin metal strip under bidirectional tension according to claim 1 , wherein the bottom surface of the first upper pressure plate and an upper surface of the lower arm extending from the first C-shaped chuck frame are respectively provided with corrugated stripe grooves so as to prevent slipping of the thin metal strip.

5. The pulse current processing apparatus for the thin metal strip under bidirectional tension according to claim 1 , wherein contact surfaces between the insulating layers arranged on the bottom surface of the second upper pressure plate and the upper surface of the lower arm extending from the second C-shaped chuck frame are respectively arranged as corrugated stripe grooves so as to prevent slipping of the thin metal str

Assignees

• Univ Taiyuan Technology

Inventors

• Wang Tao
• Zhang Haoran
• Liu Qi
• Ding Qingshan
• Wei Shufeng
• Fan Wanwan
• Ren Zhongkai

Classifications

• B21D25/00

  Working sheet metal of limited length by stretching, e.g. for straightening · CPC title

• B21B2001/386

  Plates · CPC title

• G01S17/08

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title

• C21D10/00 Primary

  Modifying the physical properties by methods other than heat treatment or deformation · CPC title

• B21B1/38 Primary

  for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, {pack rolling}(B21B1/40 takes precedence; folding sheets before, or separating layers after, rolling B21B47/00) · CPC title