Curved surface positioning device

Abstract

The invention provides a curved surface positioning device which comprises a base, a plumb rod, a laser range finder, a vertical graduated scale, a laser scribing instrument, a height regulation rod and a height regulation mechanism; the plumb rod and the vertical graduated scale are fixed on the base and are arranged in parallel; the laser range finder is fixed on the plumb rod; the upper end and the lower end of the height regulation rod are fixed on the plumb rod through connection rods respectively; the height regulation mechanism is arranged on the height regulation rod in a sliding manner; the laser scribing instrument is fixed on the height regulation mechanism; and the height of the laser scribing instrument is regulated by the height regulation mechanism. The curved surface positioning device is simple to operate, can perform accurate positioning or scribing on curved surfaces of various vehicles without measurement, can completely put an end to occurrence of reworking and improves the operation efficiency.

Description

technical field [0001] The invention relates to the field of rail transit equipment manufacturing, in particular to a curved surface positioning device. Background technique [0002] At present, safety, comfort and speed have become the basic requirements for people to travel. In order to ensure the safety of driving and maximize the speed of the train, it is necessary to increase the structural strength of the train and reduce the resistance when the train is running. Therefore, the shape of the EMU is curved. Has become a design and development trend. However, the curved surface structure will also bring a series of difficulties to production and construction. If there is no good process method, it will affect the manufacturing accuracy and production efficiency of the train body. [0003] The side walls of some existing high-speed EMUs are three-dimensional curved surfaces. In order to install various components on the inner walls, various fixing parts must be welded or ...

AI Technical Summary

Problems solved by technology

Before welding or riveting each fixing piece, it must be positioned on the curved side wall. Because the side wall is a three-dimensional curved shape, the coordinate size of the mounting piece given in the drawing is composed of horizontal size and vertical size. The horizontal size is easy to measure and the accuracy is easy to guarantee. ; The dimension span in the height direction is relatively large, and it needs to be measured with tools such as a box ruler, a telescopic ruler, and a level ruler. Since the height dimension is on a curved surface, the measuring ruler cannot be guaranteed to be perpendicular to the measurement reference (edge ​​beam floor), which makes measurement difficult. Positioning, Low scribing efficiency and poor precision

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