Biaxial drawing clamp with adjustable drawing ratio

Abstract

The invention discloses a biaxial drawing clamp with adjustable drawing ratio, relating to a clamp of a tensile testing machine. The biaxial drawing clamp comprises a base, a drawing plate and a mounting frame, wherein an upper chuck, a lower chuck, a left upper pull rod, a right upper pull rod, a left lower pull rod and a right lower pull rod are arranged on the base and the drawing plate correspondingly, a right connecting plate is arranged on the right side of the mounting frame, the upper end and the lower end of the right connecting plate are hinged with the right upper pull rod and the right lower pull rod, respectively, a left connecting block is arranged on the left side of the mounting frame, and is hinged with the left upper pull rod and the left lower pull rod, linear bearings are arranged on the left connecting block and the right connecting block, respectively, a left horizontal pull rod and a right horizontal pull rod are arranged in the linear bearings, a left chuck is arranged on the right end of the left horizontal pull rod, a right chuck is arranged on the left end of the right horizontal pull rod, the base is provided with a left guide pillar and a right guide pillar with adjustable inclination angles, a left slider and a right slider are arranged on the left and right guide pillars correspondingly, the left horizontal pull rod is hinged with the left slider, and the right horizontal pull rod is hinged with the right slider. The biaxial drawing clamp is simple in structure, low in cost, adjustable in drawing ratio, and high in biaxial drawing precision.

Description

technical field [0001] The invention relates to a fixture of a tensile testing machine, in detail, it is a biaxial tensioning device with simple structure, low cost, adjustable tensile ratio and high biaxial tensile precision, which is suitable for uniaxial tensile testing machines. Stretching fixture. Background technique [0002] As we know, the existing biaxial tensile devices used to test the cross-directional force performance of samples or used in production usually use a combination of multiple clamps, and use at least two relatively independent driving devices to cooperate with the clamps to work. For example, the application number published by the State Intellectual Property Office: 201210107058.7, titled: Biaxial material tensile test device and application method for the invention patent application of the device, the device uses the first and second two drive motors, connected by a screw Four collets realize cross bidirectional tension, and its structure is com...

AI Technical Summary

Problems solved by technology

For example, the application number published by the State Intellectual Property Office: 201210107058.7, titled: Biaxial material tensile test device and application method for the invention patent application of the device, the device uses the first and second two drive motors, connected by a screw Four collets realize cross biaxial tension, its structure is complex, multiple driving mechanisms and screw transmission mechanisms have large mischecks and low precision; it is not suitable for uniaxial tensile testing machines

The State Intellectual Property Office has published an invention patent with the application number 201110182232.X and the name: biaxial synchronous stretching device. It is not adjustable; and the cables of commonly used common materials are malleable, which will cause large errors

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