Truss location device based on flexible tool and location method thereof

Abstract

A truss location device based on a flexible tool comprises a pedestal which is provided with at least two groups of brackets horizontally moving along the pedestal; a plurality of flexible location joint holders are relatively arranged on the brackets and can perform transverse relative motion along the brackets; the upper portions of the flexible location joint holders are provided with a plurality of flexible location joints; the flexible location joints can perform longitudinal relative motion along the flexible location joint holders; the flexible location joints have movable joints, the movable joints can randomly rotate in a certain range and have a self-locking function; and the device also comprises a laser tracker and an optical reflector installed at the measurement reference points of the flexible location movable joints.

Description

technical field [0001] The invention relates to a truss positioning device and a positioning method, in particular to a truss positioning device and a positioning method based on flexible tooling. Background technique [0002] The truss structure is the most commonly used in the field of engineering applications, and it is also a structural form with high efficiency. It has the characteristics of simple structure, various forms, reasonable force, strong space adaptability, flexible structural layout and convenient construction, so it has a wide range of applications. [0003] At present, the truss structure is generally composed of upper chords, lower chords, oblique rods, webs and hinge nodes. The parts are assembled by screwing or welding. During the assembly process, rigid tooling is usually used to position the parts to coordinate their space. positional accuracy. Although this positioning method based on rigid tooling can achieve high positioning accuracy, it has the f...

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Problems solved by technology

[0004] 1) The positioning method based on rigid tooling has poor positioning coordination ability and tolerance ability, and has strict requirements on the tolerance of part size;

[0005] 2) The interface between rigid tooling and parts is poorly interchangeable, requiring the use of a large number of tooling joints of different specifications to meet the operating requirements of complex working conditions; and the interface adjustment capability is limited, and structural deformation caused by assembly stress and welding stress cannot be compensated;

[0006] 3) Rigid tooling is poor in versatility. It is often necessary to invest in multiple sets of tooling or to modify the tooling repeatedly before the product is finalized to meet the technical status of the product at different stages, resulting in serious cost waste

Especially in the initial stage of new product development, the cost of tooling accounts for more than 30% of the total cost of R&D. With the improvement of immature products and the optimization of process methods, traditional tooling will also be updated and iterated in large quantities, which wastes time and increases production costs. Not conducive to business development

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