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Method to check and control a roller bending machine for continuously bending an elongated workpiece at variable curvature radii, and machine so controlled

A bending machine and bending technology, applied in the direction of program control, digital control, electrical program control, etc., can solve problems such as discarding, and achieve the effect of reducing costs

Inactive Publication Date: 2014-08-20
CML INTERNAT SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the loss may include discarding the first curved section

Method used

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  • Method to check and control a roller bending machine for continuously bending an elongated workpiece at variable curvature radii, and machine so controlled
  • Method to check and control a roller bending machine for continuously bending an elongated workpiece at variable curvature radii, and machine so controlled
  • Method to check and control a roller bending machine for continuously bending an elongated workpiece at variable curvature radii, and machine so controlled

Examples

Experimental program
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Embodiment Construction

[0027] see first figure 1 , the machine embodying the invention is for example a steeple-shaped bending and forming machine and comprises a series of three drive rolls 1, 2 and 3, at least one of which is a deforming roll. The elongated workpiece to be bent (eg, tube T) passes the drive rollers in the direction indicated by arrow F. For ease of illustration, rollers 1 and 3 are fixed in their positions, while roller 2 is adjustable in its vertical position and can be controlled by the machine to move based on retroactive control in the vertical direction. An encoder 4 is associated with the vertically adjustable roller 2 and the encoder for measuring the displacement of the tube T through the series of rollers 1 , 2 and 3 is indicated at 5 .

[0028] A non-contact rangefinder, generally indicated at 6, is fixed in its position, eg comprising a laser transmitter, which provides the distance d relative to the bend leading from the machine. For convenience, the vertical alignme...

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Abstract

The invention relates to a method of checking and controlling a roll bender for continuously bending elongate workpieces with variable radii of curvature using a series of rolls for bending in the bender, comprising measuring said elongation at a point the step of elongating the distance of the workpiece, the point being downstream of the series of rollers used for bending in successive moments, calculating the radius of curvature of each bending section of said elongated workpiece, comparing the calculated radius of curvature with the desired and determine the difference between them, calculate the change in position that the upstream roller must undergo in order to cancel the difference and operate the roller upstream based on the calculated change in position. A machine embodying the method is also described.

Description

technical field [0001] The present invention relates to a method of inspecting and controlling a roll bender which continuously bends elongated workpieces with variable radii of curvature. Furthermore, the invention relates to a roll bending machine controlled in this way. Background technique [0002] U.S. Patent No. 4,761,979 to Mitsubishi Denki, Tokyo (Japan) describes a pinnacle-type roll bending apparatus having a curvature measurement unit adapted to measure the radius of curvature of a workpiece, the curvature measurement unit comprising at least three On the needle holder, at least one of the probes is a moving probe whose linear displacement produces a corresponding electrical output signal, and the remaining probes are fixed probes. The drive cylinder of the curvature measuring unit moves the probe holder towards the workpiece until all the probes are firmly in contact with the surface of the workpiece, in this state the electrical output signal is applied to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D7/08
CPCG05B2219/37403G05B2219/37573G05B2219/45143G05B19/19B21D5/14B21D7/08
Inventor A·卡波鲁索E·斯基亚兰特G·罗索
Owner CML INTERNAT SPA