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Circularity error offline measuring method

A roundness error, off-line measurement technology, applied in the direction of mechanical counter/curvature measurement, can solve the problems of workpiece roundness error, difficult to measure large-sized workpieces, etc., and achieve the effect of high measurement accuracy

Active Publication Date: 2018-09-07
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that it is difficult to measure the roundness error of large-sized workpieces or the roundness error of the workpiece cannot be rotated due to structural limitations, and propose an off-line method for measuring the roundness error of large-scale workpieces

Method used

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  • Circularity error offline measuring method
  • Circularity error offline measuring method
  • Circularity error offline measuring method

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and example the present invention is further described;

[0041] figure 2 Among them, the profile surface of the support wheel a5 is close to the workpiece b4 under test, the angle between the two support wheels and the common tangent to the workpiece under test is α, and the dial indicator b8 forms a certain declination angle β with the vertical direction and points to pass through the two supports at this time. The point of tangency between the wheel and the measured workpiece b4 is perpendicular to their common tangent intersection point (instantaneous circle center). The purpose of the dial indicator offset is to reduce the influence of harmonic loss on the measurement results. In the XOY coordinate system, A represents the position of the dial indicator b8, B and C are the contact points where the measured workpiece is tangent to the two supporting wheels of the measuring bracket b6, and O 1 is the instantaneous cent...

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Abstract

The invention belongs to the geometric sense tolerance measuring technical field, and provides a circularity error offline measuring method; in the measuring process, a tested member can be placed ina random orientation without being moved, conveyed or rotated; a measuring rack having a sensor or a dial gauge can make circumference sampling according to a pitch method; revolution reference axis position change errors can be separated by a mathematic method. The measuring method is simple in operation, low in measuring condition requirements, high in measuring precision, large in a measuring range, and suitable for circularity measurements of a large scale work member or work members that cannot be rotated duo to structure limits.

Description

technical field [0001] The invention belongs to the technical field of geometric quantity tolerance measurement, in particular to an off-line measurement method for the roundness error of workpieces (especially large-sized workpieces). Background technique [0002] At present, all methods of measuring the roundness error of workpieces need to establish a reference axis of rotation during measurement, and around the reference axis of rotation, or a stationary probe or dial gauge samples data from the surface of a rotating workpiece, or a rotating The measuring head or dial indicator samples data on the surface of the workpiece to be tested; even if the dial indicator and V-shaped iron are used to measure the roundness error by measuring the runout at the workshop site, such as figure 1 As shown, the workpiece is also required to rotate on the V-shaped iron, and the surface shape error of the workpiece rotating on the V-shaped iron directly affects the position of the simulate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/20
Inventor 张镭马锐
Owner NORTHEASTERN UNIV
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