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Load Cell Structure Design Innovation
Dec 21, 2017

At present, two kinds of design methods are adopted in our strain gauge load cell enterprises. One is the traditional design method, which is the classical calculation method + experience. It is a semi-theoretical and semi-empirical design, which can not achieve the optimal design and affects the boundary of elastic elements. Support stiffness and stress concentration are difficult to analyze and are used by some medium and small-sized enterprises. The second is the modern design law, which is an extension of the traditional design theory, a variety of design techniques, theories and methods of synthesis, that is, to establish a mathematical model, the use of finite element method for calculation and analysis. Its features are: the design means accurate, computerized, but still need physical modeling, physical testing and testing, widely used by large enterprises.
For a long time, domestic and overseas weighing sensor companies are exploring a scientific and rational, cost-effective product design and manufacturing methods to support the product design, manufacturing, testing, application and other stages of life-cycle data definition and delivery. The emergence of the technology based on the model definition (MBD) provides an effective way to solve this problem. Model definition technology is the product of all the relevant design definitions, process descriptions, attributes and management information are attached to the product of three-dimensional model of the digital definition of the method for the three-dimensional digital design and manufacturing provides a theoretical basis.
In the international market leader position weighing sensor manufacturing enterprises, as early as a few years ago began the structural design pattern innovation, based on the model definition technology to achieve a three-dimensional digital design and manufacturing. Its features are: to change the original design of the load cell design, design tools from the transformation to start with the establishment of independent intellectual property rights of three-dimensional digital rapid sample design platform. Including the rapid design and calculation of the overall structure of the elastic element; the analysis of the influence of the boundary conditions of the introduced load and the bearing load; the analysis of the combined analysis and design subsystem of the load head, the bearing pad and the mounting platform. The establishment of the overall structure of the load cell three-dimensional digital sample, the digital model to replace the physical model, the overall structure and accessories to achieve "meet in advance" to identify and solve the problem of incompatibility. From the theoretical analysis and calculation, the overall structure and accessories design, to ensure that the load cell performance fluctuations.

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