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Method and device for recording the straightness of elongated products

A measuring device and straightness technology, applied in the direction of measuring device, length measuring device, optical device, etc., can solve the problem of friction affecting roller table contact uncertainty and so on

Inactive Publication Date: 2008-07-23
SMS MEER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bending balance is only conditionally used in the process
In addition, the influence of friction and contact with the roller table is uncertain

Method used

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  • Method and device for recording the straightness of elongated products
  • Method and device for recording the straightness of elongated products

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] Measuring device M according to FIG. 1 comprises two groups spaced apart from each other, each having two roller pairs, wherein the upper rollers 2, 4, 6 and 8. These two roller pairs form clamping areas I and II for elongated products P, such as rolled steel beam profiles or rails, which pass continuously through the measuring device M in the flow direction MF. The continuously passing elongated product P occupies a defined unsupported overhang length L between the roller pairs or clamping regions I, II. In the region of this unsupported clamping length, the elongated product experiences a deflection S due to its own weight, which deflection S can be represented expediently as an elastic deformation by applying a force F. A chord q placed in perfect straightness on the unsupported extension length L allows the deflection S and the resulting force to be determined with suitable measuring equipment (not shown) and as a function of S and F. Identify the string. The mea...

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Abstract

The method involves clamping an elongated product (P) between two areas, which are spaced apart from each other, in a defined manner. Straightness of the elongated product is automatically determined using deflection (S) of the elongated product in a free length of restraint (L) between a support and an ideal chord, which bypasses the deflected length of restraint. The length of restraint of the elongated product is subjected by a force and elastically deformed with specific deflection. An independent claim is also included for a device for measuring straightness of elongated products e.g. rolled rails, carrier and beam.

Description

technical field [0001] The invention relates to a method and a device for measuring the straightness of elongate products having the features stated in the preambles of the two independent claims. Background technique [0002] In a known method, the straightness of the profile is determined, for example by placing a support on the flange and measuring the chord with a close-fitting wire. Such manual measurements take a long time and thus lead to loss of production. [0003] In order to automatically measure and determine the straightness of rails and profiles on continuous products, it is known in practice to use laser measuring devices or laser measuring methods. For this purpose, the track is moved at a speed of approx. 1 m / s via the roller table and the distance between the laser head and the track is measured, from which the waviness (straightness on a small length scale such as 1 m) can be determined . The basis of this measuring principle is the simultaneous positio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20G01B11/16B21B38/02B21C51/00
CPCB21B38/00G01B11/16G01B13/16G01B11/24G01B21/24G01B21/30
Inventor T·多比T·纳扎克
Owner SMS MEER
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