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Bend steel bar inner arc radius measuring pair ruler

A technology of radius measurement and bending of steel bars, which is applied to measurement devices, mechanical measurement devices, instruments, etc., to achieve the effect of simple and accurate measurement method and simple structure

Inactive Publication Date: 2011-10-26
ZHONGTIAN CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in actual application, the radius is pre-selected by the size of the bending axis on the steel bending machine. Whether the inner diameter of the steel bar after bending meets the requirements is currently not tested by special instruments or equipment. For this reason, the applicant specially Developed a pair of measuring rulers with simple structure but accurate measurement

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  • Bend steel bar inner arc radius measuring pair ruler
  • Bend steel bar inner arc radius measuring pair ruler
  • Bend steel bar inner arc radius measuring pair ruler

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Embodiment Construction

[0014] The present invention is a measuring ruler for inner arc radius of bent steel bar, which utilizes that the center of the arc must be on the midline of the line connecting any two points of the arc, and two midlines are respectively connected by any two points of the arc. The principle that the intersection point must be the center of the circle is made, for this reason it includes a pair of crosshairs 1,2 made of transparent material, the longitudinal scales of the pair of crosshairs 1,2 are located at the right and left of the longitudinal rulers 11,21 respectively Side and horizontal scales are all located at the lower side of cross ruler 12, 22, and the vertical and horizontal scales of the pair of cross rulers 1, 2 are respectively marked up and down, left and right at the intersection of their scales, as Figure 1-3 shown. In the measurement, first place the cross ruler 1 whose vertical scale is on the right side of the longitudinal ruler on the steel bar 3 to be m...

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Abstract

The invention provides a bend steel bar inner arc radius measuring pair ruler which comprises a pair of cross rulers made of transparent material. Vertical scales of the cross rulers are respectively at a left and a right side of the vertical rulers, and horizontal scales are at lower sides of horizontal rulers. The vertical and horizontal scales of each cross ruler extend from their intersections upward downward leftward and rightward. Vertical ruler scales intersections of the cross rulers are utilized to obtain a center of circle of a steel bar bend arc. Once the center of circle is determined, bend arc internal diameter is easy to read. The bend steel bar inner arc radius measuring pair ruler in the invention has a simple structure, and the measuring method is simple and accurate.

Description

【Technical field】 [0001] The invention relates to a measuring instrument for construction, in particular to a measuring ruler for measuring the bending radius of steel bars for construction. 【Background technique】 [0002] We know that our country has certain requirements for steel bars for construction after bending, and its bending inner diameter R≥4d (the diameter of the steel bar). At present, in actual application, the radius is pre-selected by the size of the bending axis on the steel bending machine. Whether the inner diameter of the steel bar after bending meets the requirements is currently not tested by special instruments or equipment. For this reason, the applicant specially A pair of measuring rulers with simple structure but accurate measurement has been developed. 【Content of invention】 [0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a measuring ruler for measuring the inner arc radius of bent steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/213G01B1/00
Inventor 唐才均
Owner ZHONGTIAN CONSTR GROUP
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