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Measurement apparatus of center position accuracy of all journals of crank shaft, and measurement and calibration methods thereof

A technology for measuring devices and center positions, applied in measuring devices, optical devices, instruments, etc., can solve problems such as expensive, difficult to configure in large quantities, and time-consuming

Inactive Publication Date: 2016-03-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of measuring instrument has high precision, but it takes a long time for a single measurement, and it is expensive and difficult to configure in large quantities
In actual production, only a very low frequency of parts sampling inspection can be undertaken

Method used

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  • Measurement apparatus of center position accuracy of all journals of crank shaft, and measurement and calibration methods thereof
  • Measurement apparatus of center position accuracy of all journals of crank shaft, and measurement and calibration methods thereof
  • Measurement apparatus of center position accuracy of all journals of crank shaft, and measurement and calibration methods thereof

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Embodiment Construction

[0055] A device for measuring the center position of each journal of a crankshaft and a method for measuring and calibrating the present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0056] A device for measuring the center position of each journal of a crankshaft according to the present invention includes a measuring device base 1, and an oil seal journal 11 for supporting the measured crankshaft 7 is arranged on one end of the measuring device base 1 along the length direction. The front neck bracket 3, the other end is symmetrical with the front neck bracket 3 and is provided with a rear neck bracket 3 for supporting the gear journal 10 of the measured crankshaft 7, between the front neck bracket 3 and the rear There are more than 3 main journal measuring frames 5 corresponding to the main journals 9 of the crankshaft 7 to be tested between the neck brackets 2 , 3-17 of which can be set, and are set between ...

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Abstract

The invention relates to a measurement apparatus of center position accuracy of all journals of a crank shaft, and measurement and calibration methods thereof. The measurement apparatus comprises a measurement apparatus pedestal, two crank shaft journal supports, five main shaft journal measurement racks, four eccentric shaft journal measurement racks, and corresponding laser displacement sensors. The crank shaft is arranged on the crank shaft journal supports, so that all journals of the crank shaft are located above the main shaft journal measurement racks or eccentric shaft journal measurement racks. On the basis of the structure, the two laser displacement sensors on the two planes of the main shaft journal measurement racks or the eccentric shaft journal measurement racks obtain coordinates of two laser spots on the main shaft journal surface or eccentric shaft journal surface; on the premise that diameters of all journals of the crank shaft are known and deviation from circular form is ignored, journal center position coordinates of all journals relative to the corresponding measurement racks are obtained; the center coordinates of all journals are converted under a measurement apparatus pedestal coordinate system in a unified mode, so that center position accuracy information of all journals of the crank shaft is obtained. Source tracking is carried out on all coordinate systems of the measurement apparatus by using a standard crank shaft to complete calibration. The measurement becomes rapid; and full detection of batches of crank shafts can be carried out conveniently.

Description

technical field [0001] The invention relates to a measurement of the center position of each journal of a crankshaft. In particular, it relates to a measuring device for the center position of each journal of a crankshaft and a measuring and calibrating method. Background technique [0002] The crankshaft is an important part of the piston engine. It is used to support the transmission components such as the connecting rod and the piston to form the crank connecting rod mechanism. When the engine is working, the downward thrust of the piston is transmitted to the crankshaft through the connecting rod, and the impact load on the crank bearing changes the reciprocating motion of the piston into the rotational motion of the crankshaft around its own axis, so as to transmit torque to achieve outward output power. The position accuracy of the journal of each part of the crankshaft will directly determine the matching and rotation accuracy of the connecting rod and piston, result...

Claims

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Application Information

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IPC IPC(8): G01B11/00
Inventor 王仲王磊付鲁华刘尧夫吴振刚李兴强吴翔宇
Owner TIANJIN UNIV
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