CN215525335U - Experimental device for be used for measuring tensile test fracture sample length - Google Patents
Experimental device for be used for measuring tensile test fracture sample length Download PDFInfo
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- CN215525335U CN215525335U CN202121760806.2U CN202121760806U CN215525335U CN 215525335 U CN215525335 U CN 215525335U CN 202121760806 U CN202121760806 U CN 202121760806U CN 215525335 U CN215525335 U CN 215525335U
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Abstract
本实用新型公开了一种用于测量拉伸试验断裂试样长度的实验装置，包括底座(1)，底座(1)一端为挡板，底座(1)内有型腔，固定定位装置(2)固定于底座(1)型腔的一端，型腔侧壁开有滑动键槽(4)，滑动键槽(4)始于固定定位装置(2)的末端即远离挡板的一端，终于底座(1)型腔的另一端；本实用新型的用于测量拉伸试验断裂试样长度的实验装置，能够夹持断裂试样进行轴向拼接；有一定的伸缩性，能够适应试样在拉伸实验中长度发生的变化；同时本装置简单且易操作，夹持好试样后，直接利用移动装置的定位指针直接进行读数，减少测试时间，最大化提高实验效率。
The utility model discloses an experimental device for measuring the length of a tensile test fracture sample, comprising a base (1), one end of the base (1) is a baffle plate, a cavity is arranged in the base (1), and a fixing and positioning device (2) ) is fixed at one end of the cavity of the base (1), the side wall of the cavity is provided with a sliding keyway (4), and the sliding keyway (4) starts from the end of the fixed positioning device (2), that is, the end away from the baffle, and ends at the base (1). ) the other end of the cavity; the experimental device for measuring the length of the fractured sample in the tensile test of the present utility model can clamp the fractured sample for axial splicing; it has certain flexibility and can adapt to the tensile test of the sample. At the same time, the device is simple and easy to operate. After the sample is clamped, the positioning pointer of the mobile device can be used for reading directly, which reduces the test time and maximizes the experimental efficiency.
Description
Technical Field
The utility model relates to an experimental device for measuring the length of a breaking sample in a tensile test.
Background
Tensile testing is a routine test of the mechanical properties of steel products, in which elongation after fracture is the most important indicator. The test specimen was placed on a tensile testing machine to test, and the elongation of the test specimen after breaking was measured. The traditional measuring method is to splice two broken parts together, measure the length of the broken part by using a measuring tool, and require the original sample to be in butt joint at the broken position during butt joint, and if no clamping device is used, the round axis degree of the sample for breakage measurement cannot be ensured. The sample needs manual fixed, if the measuring tool touches the sample in the measurement process, the sample position moves, still needs to operate again, especially bar-shaped sample rolls more easily, measures and wastes time and energy, and measuring error is great, influences result and experimental analysis.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an experimental device for measuring the length of a breaking sample in a tensile test aiming at the defects of the prior art.
The utility model adopts the following technical scheme:
an experimental device for measuring the length of a tensile test fracture sample comprises a base 1, wherein one end of the base 1 is a baffle, a cavity is arranged in the base 1, a fixed positioning device 2 is fixed at one end of the cavity of the base 1, the side wall of the cavity is provided with a sliding key groove 4, the sliding key groove 4 starts from the tail end of the fixed positioning device 2, namely one end far away from the baffle, and finally the other end of the cavity of the base 1; the movable positioning device 3 is in sliding fit with the base 1 through the sliding key groove 4; the fixed positioning device 2 is provided with a planar plate-shaped sample object stage 6 and a concave rod-shaped sample object stage 7, and the bottom of the fixed positioning device is provided with a bolt hole for fixing with the base 1; the mobile positioning device 3 is provided with a planar plate-shaped sample object stage 6 and a concave bar-shaped sample object stage 7, sliding keys 8 for sliding are arranged on two sides of the mobile positioning device 3, the sliding keys 8 are matched with the sliding key grooves 4, and the tail end of the mobile positioning device 3 is provided with a baffle plate reading pointer 9.
According to the experimental device, the thicknesses of two side walls of the cavity of the base are different, and a dividing ruler 5 is arranged on one thicker side.
In the experimental device, the width of the plate-shaped sample object stage 6 is more than 25mm so as to meet the standard samples with different sizes.
According to the experimental device, the length of the plate-shaped sample carrying platform 6 is larger than 50mm so as to ensure that a sample can be stably placed on the carrying platform.
The experimental device adopts a bow-shaped groove-shaped rod-shaped sample objective table to place a rod-shaped sample, the diameter of the rod-shaped sample objective table is larger than 20mm, and the chord length of the rod-shaped sample objective table is not larger than 18mm, so that the rod-shaped sample can be stably placed in the experimental device.
According to the experimental device, the arrangement position of the sliding key 8 is required to be arranged above the gravity center, so that the gravity center and the sliding key 8 are located on the same horizontal plane when a sample exists.
In the experimental device, the length of the sliding key 8 should not be less than half of the length of the mobile positioning device 3.
In the experimental device, the sliding key 8 is in transition fit with the key groove in the inner cavity of the base.
In the experimental device, the center of the section of the rod-shaped sample objective table of the mobile positioning device 3 and the center of the rod-shaped sample objective table of the fixed positioning device 2 are coaxial at a higher tolerance level.
The experimental device for measuring the length of the tensile test breaking sample can clamp the breaking sample to be axially spliced; the stretching device has certain elasticity and can adapt to the change of the length of a sample in a stretching experiment; meanwhile, the device is simple and easy to operate, after a sample is clamped, the positioning pointer of the mobile device is directly used for reading, the testing time is shortened, and the experimental efficiency is improved to the maximum extent.
Drawings
FIG. 1 is a sample assembly drawing;
FIG. 2 is a fixed positioning device;
FIG. 3 is a mobile positioning device;
FIG. 4 is a schematic view of a plate-like specimen;
FIG. 5 is a schematic view of a bar sample;
1, a base; 2 fixing the positioning device;
3 moving the positioning device; 4, a sliding key groove;
5, dividing a scale; 6 a plate-like sample stage;
7 a rod-shaped sample stage; 8 a sliding key;
9 baffle reading pointer;
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1-3, the experimental device for measuring the breaking length of the tensile test of the plate-shaped or bar-shaped tensile test sample comprises a base 1, wherein the leftmost end of the base 1 is a baffle and is internally provided with a cavity, a fixed positioning device 2 is fixed at one end of the cavity of the base 1, the side wall of the cavity is provided with a sliding key slot 4, and the sliding key slot 4 starts from the tail end of the fixed positioning device 2 (i.e. the end far away from the baffle) and ends at the other end of the cavity of the base 1; the movable positioning device 3 is in sliding fit with the base 1 through the sliding key groove 4; the fixed positioning device 2 is provided with a planar plate-shaped sample object stage 6 and a concave rod-shaped sample object stage 7, and the bottom of the fixed positioning device is provided with a bolt hole for fixing with the base 1; the mobile positioning device 3 is provided with a planar plate-shaped sample object stage 6 and a sunken rod-shaped sample object stage 7, sliding keys 8 used for sliding are arranged on two sides of the mobile positioning device 3, the sliding keys 8 are matched with the sliding key grooves 4, a baffle reading pointer 9 is arranged at the tail end (namely, one end far away from a baffle) of the mobile positioning device 3, the thicknesses of two side walls of the base cavity are different, a dividing ruler (5) is arranged on one thicker side of the base cavity, the indication value of the baffle reading pointer 9 on the dividing ruler 5 is the fracture length of the plate-shaped sample tensile test, and the length of two ends of the plate-shaped sample object stage (namely, the length of two times a is subtracted) is required to be subtracted from the rod-shaped sample value.
Example 1:
the design tool is used for measuring the length of a plate-shaped tensile sample in a fracture state, and the size of a standard sample (as shown in figure 4) is as follows: 190mm long, 20mm wide and 0.8mm thick.
The specific operation process is as follows:
1. and (4) adopting a standard sample size to carry out a tensile test on a mechanical experiment stretcher.
2. The fracture butt joint is carried out to the sample that will break, with the great half of rupture length, puts into the one side that this experimental apparatus plate-like sample objective table 6 leaned on the scale, and the edge platform of being convenient for supports.
3. The mobile positioning device 3 moves to the other end of the base, the remaining half of the sample is placed in the mobile positioning device, and the tail of the sample is adjusted by moving the mobile positioning device to be abutted with the fracture, so that the tail of the sample is tightly attached to a baffle reading pointer 9 of the mobile positioning device.
4. The reading is made directly by the baffle reading pointer 9.
Example 2:
the length of the bar-shaped tensile sample in a breaking state is measured, and the standard sample size (shown in figure 5) is as follows: the length is 150mm, and the diameter of the cylinders at the two ends is 20 mm.
1. And (4) adopting a standard sample size to carry out a tensile test on a mechanical experiment stretcher.
2. The rod-shaped breaking sample is subjected to fracture butt joint and marking, a half of the larger fracture length is placed into the rod-shaped sample objective table 7 of the experimental device, and the end face of the baffle plate is tightly attached to the front of the objective table.
3. And moving the positioning device to the other end of the base, placing the rest half of the sample in the positioning device, moving the mobile device to butt the fracture according to the butt fracture mark, and adjusting the tail of the sample to enable the tail of the sample to be tightly attached to the baffle of the mobile device.
4. After clamping, the baffle reading pointer 9 is used for directly reading, and the actual value is subtracted by the length of twice a, so that the experimental real data is obtained.
The utility model designs and provides an experimental device suitable for the tensile test fracture length of a plate-shaped or rod-shaped tensile test sample, and the measurement of the test sample after the tensile test fracture is simplified, the measurement accuracy is ensured, and the measurement efficiency is improved by adopting a mode of tightly extruding the fractured test sample by using a fixed positioning device 2 and a movable positioning device 3.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121760806.2U CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121760806.2U CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215525335U true CN215525335U (en) | 2022-01-14 |
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ID=79788397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121760806.2U Expired - Fee Related CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215525335U (en) |
-
2021
- 2021-07-30 CN CN202121760806.2U patent/CN215525335U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220114 |