Compression strength testing tool

Abstract

The utility model belongs to the technical field of mechanical testing, and particularly relates to a compression strength testing tool. The clamp comprises an upper clamp and a lower clamp, the upper clamp comprises a cylinder portion, the end face of the cylinder portion is in contact with an object to be detected, the lower clamp comprises a chuck used for clamping the object to be detected, the diameter of the section of the cylinder portion is smaller than 5 mm, the chuck is a disc, and a plurality of clamping corners distributed in a circumferential array mode are arranged on the periphery of the disc. According to the utility model, a stable clamp plane and a reduced measurement area are provided, the structure is simple, and the assembly is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical testing, and in particular designs a compression strength testing tool. Background Art

[0002] The main instrument for measuring the mechanical properties of precision items currently available is a universal testing machine. Its matching fixture consists of two upper and lower discs. The sample to be tested is placed in the center of the lower disc, and the upper fixture is connected to the sensor. The commonly used compression method is GB / T 7314-2017 room temperature compression method for metal materials. The upper fixture is moved to about 2mm from the surface of the material to be tested to start the test, and the upper fixture compresses the sample to be tested downward until the instrument detects a fracture, and the experiment ends. The existing compression fixture is two discs, but some items that require high precision have curvatures, such as skulls or skull repair products. When the skull or repair products are placed on the platform, it cannot provide a stable measurement plane, and the skull will move with the application of pressure, causing data errors. In addition, the area of ​​the upper fixture is much larger than the surface area of ​​the material, and the mechanical properties near the skull repair (usually 5 to 8mm) cannot be accurately measured. Detecting the mechanical properties of the new tissue structure near the implant is an important criterion for judging skull repair materials. The utility model reduces the contact surface of the upper fixture, improves the measurement accuracy, and achieves the purpose of detecting the mechanical properties of a specific position. The lower fixture is changed from a disc to a chuck, which is connected to the original base through a flange. The chuck has four clamping corners, which can fix samples of various sizes without moving the samples, thereby optimizing the test of compression performance. Utility Model Content

[0003] In view of the defects existing in the prior art, the purpose of the utility model is to provide a compression strength testing tool with a reduced cross-section of an upper clamp and a chuck as a lower clamp.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a compression strength test fixture, including an upper fixture and a lower fixture, the upper fixture includes a cylindrical portion whose end face contacts the object to be tested, and the lower fixture includes a chuck 1 for clamping the object to be tested, the cross-sectional diameter of the cylindrical portion is less than 5mm, the chuck 1 is a circular disc, and a plurality of clamping angles arranged in a circular array are provided on the outer circumference of the circular disc.

[0005] The compression strength test fixture provided by the utility model has the following beneficial effects: the long cylindrical upper fixture reduces the contact area with the material to be tested, and can measure the compressive mechanical properties of the specified area. The lower fixture combined with the chuck and the flange first enhances the stability of the skull or skull repair material through the clamping angle, and provides a stable detection plane. The flange is reasonably designed, with high precision, small shape and position tolerance, easy processing, regular internal and external dimensions of the chuck, and easy assembly. The chuck-flange combination fixture provided by the utility model has a reasonable structural design, stable clamping without tilting, high production efficiency, and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The utility model has the following drawings:

[0007] Figure 1 A side view of the components of the fixture of the utility model. DETAILED DESCRIPTION

[0008] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the disclosed embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0009] The utility model provides a compression strength testing fixture, comprising an upper fixture and a lower fixture, the upper fixture comprising a cylindrical portion whose end face contacts with an object to be tested, the lower fixture comprising a chuck for clamping the object to be tested, the cross-sectional diameter of the cylindrical portion is less than 5mm, the chuck is a circular disc, and a plurality of clamping angles arranged in a circumferential array are arranged on the outer circumference of the circular disc.

[0010] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A compression strength testing tool, characterized in that: Including upper clamp and lower clamp, The upper clamp comprises a cylindrical portion whose end face contacts the object to be detected, and the lower clamp comprises a chuck (1) for clamping the object to be detected. The cross-sectional diameter of the cylindrical portion is less than 5 mm. The chuck (1) is a circular disk, and a plurality of clamping angles arranged in a circumferential array are provided on the outer circumference of the circular disk.

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