Patent ID: 9662697
Date: 2017-05-30
CPC Classifications: B21C

Claim:
1. A take-up device for a strip, comprising: a mandrel for taking up the strip; a fluid-pressure device for expanding and contracting the mandrel, a pressure detection device that detects a pressure of a hydraulic fluid in the fluid-pressure device; a control device configured to wherein the control device performs position control for expanding the mandrel according to a number of turns of the strip until the number of turns of the strip reaches the first reference turn count; wherein the control device performs constant-pressure control for making the calculated tightening pressure constant after the number of turns of the strip reaches the first reference turn count, wherein the control device stores a first reference pressure; and wherein if the calculated tightening pressure reaches the first reference pressure before the number of turns of the strip reaches the first reference turn count, the control device starts the constant-pressure control before the number of turns of the strip reaches the first reference turn count.