Active heat dissipation measurement auxiliary device for percentage elongation after fracture of high-temperature tensile test sample

Abstract

The utility model provides an active heat dissipation measurement auxiliary device for the percentage elongation after fracture of a high-temperature tensile test sample, which comprises a horizontally arranged rectangular base and is characterized in that the upper side of the rectangular base is connected with two symmetrically arranged movable brackets in a sliding manner through a sliding rail mechanism; the top end of each movable support is fixedly connected with a sample fixing support, and locking mechanisms are arranged at the ends, close to each other, of the sample fixing supports; two symmetrically arranged circular holes are formed in the top end of the rectangular base, and cooling fans are arranged in the circular holes. According to the utility model, the problem that the fracture part of the sample is difficult to align and maintain on the same horizontal axis is effectively solved. And under the action of active heat dissipation, the sample can be rapidly cooled to a temperature range suitable for measurement, so that the efficiency of measurement work is remarkably improved. Meanwhile, in the measuring process, the sample is stably clamped between the fixing clamps, and measuring errors caused by shaking of the sample are effectively avoided.

Description

Technical Field

[0001] This utility model patent belongs to the technical field of material tensile performance testing, and specifically relates to an auxiliary device for actively dissipating heat to measure the elongation after fracture of a high-temperature tensile test specimen. Background Art

[0002] In the high-temperature tensile test, elongation after fracture and reduction of area are key parameters for measuring the mechanical properties of materials. In order to ensure the accurate measurement of these parameters, the GB / T 228.2-2010 standard specifies the determination method of the original gauge length L0 and the gauge length after fracture Lu, and emphasizes the importance of measuring the gauge length after fracture Lu. This measurement process requires the precise alignment of the broken part of the specimen to ensure that its axis is aligned, and appropriate measures are taken to ensure good contact between the broken parts. This is crucial for the reliability of the calculation of elongation after fracture. However, the current measurement method of cylindrical specimens has obvious defects. Usually, after the specimen is broken, the fracture needs to be manually docked and measured with a vernier caliper. However, due to the instability of manual operation, such as hand shaking, it is difficult to keep the specimen in the same straight line, resulting in measurement errors. In addition, after the high-temperature tensile test, the sample needs to be completely cooled before measurement, and the rod-shaped specimen is difficult to keep on the same horizontal axis due to its round rod shape and the influence of gravity, and it is easy to roll on the table, which increases the difficulty and error of measurement. For the measurement of section shrinkage, since it is necessary to determine the minimum cross-sectional area of ​​the specimen at the fracture, and the fracture often presents an irregular shape, it is necessary to splice the two ends of the specimen for measurement. The complexity of this process makes it much more difficult to accurately measure section shrinkage than elongation after fracture.

[0003] In the face of the above challenges, there is an urgent need for an auxiliary tool that can conveniently and accurately splice the two parts of the broken specimen after the high-temperature tensile test. The tool should ensure the stability and accuracy of the specimen during the splicing process to significantly improve the measurement accuracy of the elongation and area reduction. Utility Model Content

[0004] In order to overcome a series of defects existing in the prior art, the purpose of the utility model is to provide an active heat dissipation measurement auxiliary device for the elongation after fracture of a high-temperature tensile test specimen in response to the above-mentioned problems, comprising a horizontally arranged rectangular base, the upper side of the rectangular base is slidably connected to two symmetrically arranged movable brackets through a slide rail mechanism, the top of the movable brackets are fixedly connected to a specimen fixing bracket, and the ends of the specimen fixing brackets that are close to each other are provided with a locking mechanism; the top of the rectangular base is provided with two symmetrically arranged circular holes, and the circular holes are each equipped with a heat dissipation fan.

[0005] Furthermore, the movable bracket is arranged in a vertical structure and can only move along the length direction of the rectangular base.

[0006] Furthermore, the sample fixing bracket is made of high temperature resistant material to ensure the service life in a high temperature environment.

[0007] Furthermore, the heat dissipation fan adopts an adjustable speed fan to adapt to different heat dissipation requirements.

[0008] Furthermore, a temperature sensor is provided on the sample fixing bracket for real-time monitoring of the temperature of the sample. The temperature sensor is connected to a control circuit of a cooling fan to automatically adjust the fan speed according to temperature changes.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model effectively overcomes the problem that the broken part of the sample is difficult to align and keep on the same horizontal axis. Under the action of active heat dissipation, the sample can be quickly cooled to a temperature range suitable for measurement, thereby significantly improving the efficiency of the measurement work. At the same time, during the measurement process, the sample is firmly clamped between the fixed fixtures, effectively avoiding the measurement error caused by the shaking of the sample. Therefore, the utility model can not only ensure the accuracy of the measurement of elongation after fracture and cross-sectional shrinkage, but also provide strong support for the subsequent data analysis of high-temperature tensile tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The overall structural diagram of the utility model;

[0012] Figure 2 A schematic structural diagram of a rectangular base in the utility model;

[0013] The accompanying drawings in the figure are marked as follows:

[0014] 1-Rectangular base; 2-Movable bracket, 3-Specimen fixing bracket, 4-Cooling fan. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the technical scheme in the embodiment of the utility model will be described in more detail below in conjunction with the drawings in the embodiment of the utility model. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the utility model, not all of the embodiments.

[0016] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0017] The embodiments and directional terms described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limitations on the present invention.

[0018] In a broad embodiment of the utility model, an active heat dissipation auxiliary device for measuring the elongation after fracture of a high-temperature tensile test specimen comprises a horizontally arranged rectangular base, the upper side of the rectangular base is slidably connected to two symmetrically arranged movable brackets through a slide rail mechanism, the top of each movable bracket is fixedly connected to a specimen fixing bracket, and the ends of the specimen fixing brackets that are close to each other are provided with a locking mechanism; the top of the rectangular base is provided with two symmetrically arranged circular holes, and cooling fans are installed in each of the circular holes.

[0019] Furthermore, the movable bracket is arranged in a vertical structure and can only move along the length direction of the rectangular base.

[0020] Furthermore, the cooling fan is driven by a 12V power supply.

[0021] Furthermore, the sample fixing bracket is made of high temperature resistant material to ensure the service life in a high temperature environment.

[0022] Furthermore, the heat dissipation fan adopts an adjustable speed fan to adapt to different heat dissipation requirements.

[0023] Furthermore, a temperature sensor is provided on the sample fixing bracket for real-time monitoring of the temperature of the sample. The temperature sensor is connected to a control circuit of a cooling fan to automatically adjust the fan speed according to temperature changes.

[0024] The preferred embodiments of the present invention are listed below in conjunction with the accompanying drawings to further describe the present invention in detail.

[0025] like Figure 1 As shown, the utility model provides an active heat dissipation measurement auxiliary device for the elongation after fracture of a high-temperature tensile test specimen, and its main structure includes a rectangular base 1, a movable bracket 2 slidably mounted on the rectangular base 1, a specimen fixing bracket 3 on the movable bracket 2, and a heat dissipation fan 4. When in use, first place the fractured samples after the high-temperature tensile test on the two specimen fixing brackets 3 respectively, and fix them firmly by the clamping action of the locking mechanism. Then, the distance between the two movable brackets 2 can be easily adjusted by the slide rail mechanism provided on the rectangular base 1 to ensure that the fractured samples can be fully aligned. In this process, the operation of the heat dissipation fan 4 enables the sample to be effectively dissipated in a short time, thereby quickly cooling down to a temperature range suitable for measurement. Finally, after the temperature of the sample is stable, a measuring tool such as a vernier caliper can be used to accurately measure the elongation after fracture and the cross-sectional shrinkage.

[0026] In this embodiment, the locking mechanism may adopt a U-shaped lock, or other clamps that can quickly and firmly lock the sample, thereby ensuring that the position of the sample will not shift when measuring the elongation, thereby significantly improving the accuracy and reliability of the measurement.

[0027] In this embodiment, the slide rail mechanism can be selected according to actual conditions, as long as it can realize the convenient movement of the two movable brackets 2. For example, an arc groove can be opened at the top of the rectangular base 1 along its length direction. An arc block matching the arc groove is added to the bottom of the movable bracket, and the arc block is slidably limited in the arc groove to realize movement along the length direction of the rectangular base 1. In addition, ball screws and stepper motors can also be used to achieve precise position control and fine-tuning.

[0028] In summary, the utility model has the significant advantages of simple structure, stable specimen fixation, convenient operation and accurate measurement, etc. Therefore, it has wide applicability and promotion value in the field of high temperature tensile testing.

[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An auxiliary device for measuring the elongation of a sample after high-temperature tensile test by active heat dissipation, comprising a horizontally arranged rectangular base (1), characterized in that: The upper side of the rectangular base (1) is slidably connected to two symmetrically arranged movable brackets (2) via a slide rail mechanism, the top of each movable bracket (2) is fixedly connected to a sample fixing bracket (3), and the adjacent ends of each sample fixing bracket (3) are provided with a locking mechanism; the top of the rectangular base (1) is provided with two symmetrically arranged circular holes, and each of the circular holes is provided with a cooling fan (4).

2. The active heat dissipation measurement auxiliary device for the elongation after fracture of a high-temperature tensile test specimen according to claim 1 is characterized in that: The movable bracket (2) is arranged in a vertical structure and can only move along the length direction of the rectangular base (1).

3. The active heat dissipation measurement auxiliary device for elongation after fracture of high temperature tensile test specimen according to claim 1 is characterized in that: The sample fixing bracket (3) is made of high temperature resistant material.

4. The active heat dissipation measurement auxiliary device for elongation after fracture of a high-temperature tensile test specimen according to claim 1 is characterized in that: The heat dissipation fan (4) is a fan with adjustable speed.

5. The active heat dissipation measurement auxiliary device for high temperature tensile test specimen elongation after fracture according to claim 1, characterized in that: The sample fixing bracket (3) is provided with a temperature sensor for real-time monitoring of the temperature of the sample, and the temperature sensor is connected to a control circuit of a cooling fan (4).

Images