Flexible magnet rheological tongs

Abstract

A magnetorheopectic flexible fixture suitable for the workpieces with different shapes and characteristics is composed of locating head and fixture body. Said locating head consists of pin, spring, frame and fastener. Said fixture body comprises base, recepting pool, press bar, magnetic exciting part, core rod and magnetorheopectic material. Said locating head and magnetorheopectic material are contained in the cavity of said recepting pool for clamping the workpiece.

Description

Technical field: [0001] The present invention relates to mechanical clamping devices, and more particularly to clamps that can accommodate workpieces of different shapes. Background technique: [0002] Traditional fixtures are mainly mechanical fixtures, which have been widely used in various processing industries, and their process and design criteria have been standardized. However, these traditional fixtures generally have the following disadvantages: [0003] ①Each fixture can only be designed for a certain type of workpiece with the same shape. The adaptability of the fixture to the shape of the workpiece is narrow and the use efficiency is low; ②The disassembly and assembly of the fixture can only be done manually, which is not convenient for mechanical control and the degree of automation Low. [0004] Although in response to the above problems, the design of combined fixtures and flexible fixtures has appeared (see "Flexible Fixture Design Method and Technology", M...

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Problems solved by technology

[0003] ①Each fixture can only be designed for a certain type of workpiece with the same shape. The adaptability of the fixture to the shape of the workpiece is narrow and the use efficiency is low; ②The disassembly and assembly of the fixture can only be done manually, which is not convenient for mechanical control and the degree of automation Low

[0004] Although in response to the above problems, the design of combined fixtures and flexible fixtures has appeared (see "Flexible Fixture Design Method and Technology", Mou Yanjun, Information Technology, No. 10, 2000), but because it continues to use the purely mechanical structure of the traditional fixture, Still can't solve the following problems:

[0005] ①When the rigidity of the workpiece is very low and easy to deform, the positioning and dimensional accuracy after clamping cannot be guaranteed; ②For workpieces with very irregular geometric shapes, positioning and clamping cannot be performed

However, this fixture also has great defects, which limit its industrial application:

[0007] ①The phase change takes a long time and needs to be carried out at a specific temperature; ②The cost of the phase change material itself and the cost of the equipment used are too high; ③Some phase change materials will pollute the environment and seriously damage human health, such as: lead

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