Macromolecular material tensile testing device

Abstract

The invention relates to a macromolecular material tensile testing device. The macromolecular material tensile testing device comprises a bottom plate, a base, a driver, an upright post, a cross beam, a bearing seat, a ball screw, a force transmission fixed part, a pressure sensor, a clamping apparatus, a testing piece, a clamp sleeve and a patch board, and is characterized by further comprising an optical axis rod, a smooth flange plate, an optical axis bracket, a screw flange plate, a tension groove boss, a coupler, a voltage stabilizer and a stepper motor with an encoder, wherein the upright post is of a one-piece box type and is vertically arranged on the base; the driver is a subdividing driver; the stepper motor with the encoder is connected with the bottom end of the ball screw through the coupler; the tail end of the cross beam is connected with the optical axis rod through the mode that the smooth flange plate is sleeved in a hole, the optical axis rod is connected with the optical axis bracket in a sleeve manner, and the optical axis bracket is fixed on the side surface of the upright post. The macromolecular material tensile testing device has obvious advantages of high precision and high reliability, and great reduction of the volume and manufacturing cost of the equipment.

Description

technical field [0001] The invention belongs to the technical field of material testing machines, in particular to a polymer material tensile testing device. Background technique [0002] In the field of modern materials, polymer materials based on polymer compounds are widely used in medical research, material selection, infrastructure, aerospace and other fields. Polymer materials are mainly composed of compounds with relatively high molecular weight, including rubber, plastics, fibers, coatings, adhesives and polymer-based composite materials, etc. It has a unique molecular structure and properties, and is easy to modify and process. With incomparable excellent functions of other materials, it has become an indispensable material in all aspects of food, clothing, housing and transportation in modern industry and social life. In the current situation where the material industry is becoming more and more popular, it is of great significance to study the material testing ma...

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Problems solved by technology

[0003] "Dynamic calibration of uni- Axial material testing machines)” proposed a testing machine with a double-column design structure, that is, the two columns provide driving force to the testing machine at the same time, so as to ensure sufficient driving kinetic energy, but it has the following main shortcomings: one is the use of A more complex double-column design structure is adopted, the process is complex and the processing cost is high; second, the two columns need to provide driving force at the same time, it is difficult to ensure the synchronization of the test process, resulting in low measurement accuracy of the test piece; third, the area occupied Large area requires a large space for equipment installation; Fourth, the double-column design structure causes the clamped specimen to enter the test area only from two sides, which increases the difficulty of clamping the specimen

[0004] Chinese patent application 97100487.0 discloses a "material testing machine". The material testing machine is mainly composed of a pair of vertically set up box-shaped columns, wherein: a pair of screws located in the columns, and another pair located between the columns and connected to the screw rods. The matching cross frame and two clamps are composed. When the screw rotates, the cross frame moves, and can apply tensile load to the test piece held by the clamp. Although it has sufficient driving force, it still has the following shortcomings: One is that the precision of the double-column structure is not high, which directly affects the measurement accuracy of the test piece; the other is that the double-column structure occupies a large area, the structure is complex, and the equipment manufacturing cost is high; the third is that the operable space of the double-column structure is small, which increases the installation The difficulty of clamping the specimen

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