CN2784912Y

CN2784912Y - Displacement sensitive hardness penetrator device

Info

Publication number: CN2784912Y
Application number: CN 200520009081
Authority: CN
Inventors: 包亦望; 卜晓雪; 杨建军; 邱岩
Original assignee: China Building Materials Academy CBMA
Current assignee: China Building Materials Academy CBMA; China Building Material Test and Certification Group Co Ltd
Priority date: 2005-03-25
Filing date: 2005-03-25
Publication date: 2006-05-31
Anticipated expiration: 2015-03-25

Abstract

The utility model relates to a displacement sensitive hardness squeeze head device. The utility model is characterized in that the utility model comprises a connecting socket, wherein a hardness squeeze head and a precision displacement measuring head are side by side connected to the connecting socket, the head part of the precision displacement measuring head is slightly protruded out from the head part of the hardness squeeze head, the tail part of the connecting socket is provided with an installation handle connected with a mechanical testing machine and the tail part of the precision displacement measuring head is connected with a displacement numeral display meter through a conducting wire. The utility model adopts the structure that the hardness squeeze head and the precision displacement measuring head are side by side installed on one connecting socket; thus, when load is applied to a material which needs measuring when the connecting socket of the utility model is installed on a common material testing machine, the utility model has the function of accurately measuring the corresponding relationship of squeeze depth and the load; at the same time, the utility model has simple structure, small size and convenient installation, operation and carrying, and various precision measurement to tiny displacement deformation can be satisfied, especially, the cost of the utility model is low, and the utility model not only can be used for the test and the measurement of the hardness and the elastic modulus of solid materials or thin film materials, but also can be used for other fields.

Description

The responsive hardness penetrator device of a kind of displacement

Technical field

The utility model relates to and a kind ofly with the conventional test machine consistency and elasticity modulus of solid material or membraneous material is carried out the hardness penetrator that uses in the thermometrically, particularly about a kind of responsive indenter device of displacement with accurate measurement load-displacement curve function.

Background technology

Because the hardness property of material and other physical characteristicss of material have certain special relation, and the hardness of material tests out with can comparing intuitive and convenient, so the method for hardness test has become a kind of important means of people's research material characteristic, and the history in existing over one hundred year.Traditional hardness test (as Bu Shi, Rockwell and Vickers hardness test etc.) mostly adopts the pressure head with definite shape to be pushed down into measured material in certain loading, and keep unloading after a period of time, impression size or the catercorner length that stays at material surface with scale microscope testing pressure head then, thereby draw the impression contact area, calculate the hardness of material again.This method of testing is fairly simple, but resolution is lower, can not measure parameters such as elastic modulus, does not particularly almost have residual impression concerning pure resilient material, and measuring error is just bigger.People expect the load-displacement curve of pressure head in loading procedure always, the parameters such as the recovery of elasticity of material and modulus thereby analysis is come out.

Along with science and technology, particularly developing rapidly of nanometer technology seems more and more urgent and important with the load displacement assessed in relation film of nano-precision and the surface property of nano material.The end of the eighties in last century, the American invented a kind of sclerometer that can write down load-displacement curve, but continuous recording load-displacement curve, the responsive indentation of promptly so-called displacement.It calculates the area of indentation according to the pressure head size again by measuring compression distance, thus the hardness of obtaining, simultaneously can also be from other performances of load-displacement curve release material, as elastic modulus, yield stress etc.But this scleroscopic costing an arm and a leg is very tight to sample requirement, and the load range is also very little.If can be installed on the common material testing machine by enough a kind of very simple devices, just can reach similar function, note the compression distance of pressure head and the corresponding relation between the load exactly, this material tests for domestic scientific research and industrial unit has crucial Practical significance.But in load-displacement curve that conventional Material Testing Machine records, the displacement of measuring is the sizes values that the testing machine crossbeam descends, comprising crossbeam to the displacement of the various junctions between the pressure head and crossbeam to the elastic deformation of various mechanical component in loading procedure between the pressure head, there is bigger error in the actual compression distance of this and material, therefore developing a kind of simple mechanism of direct measurement pressure head compression distance, is research topic of the present utility model.

Summary of the invention

The purpose of this utility model provides a kind of loading and unloading device of available conventional test machine tested for hardness impression, a kind of pressure head that has accurate measurement compression distance of saying so accurately, thus make common testing machine increase the displacement sensitivity hardness penetrator device that small device back have the function of accurate measurement compression distance just can the external advanced person's of picture nano indentation test equipment.

For achieving the above object, the utility model is taked following technical scheme: the responsive hardness penetrator device of a kind of displacement, it is characterized in that: it comprises a connecting seat, on described Connection Block, connect a hardness penetrator and an accurate displacement gauge head side by side, and the head of described accurate displacement gauge head slightly protrudes the head of described hardness penetrator, the afterbody of described Connection Block has the installing handle of a connection mechanical test machine, and the afterbody of described accurate displacement gauge head connects the displacement digital display table by lead.

Described Connection Block comprises the Metallic rod of a fixing described hardness penetrator, one two clamping plate that fuse with described Metallic rod, described hardness penetrator is fixed on the head of described Metallic rod, and described accurate displacement gauge head is by in the groove that is bolted to described two clamping plate and is oppositely arranged.

Described two clamping plate and described Metallic rod are integrally welded.

Described two clamping plate and the machine-shaping of described Metallic rod one.

The utility model is owing to take above technical scheme, it has following characteristics: 1, the utility model is installed in hardness penetrator and accurate displacement gauge head on the Connection Block side by side, therefore to the measured material imposed load time, when being installed in Connection Block of the present utility model on the common Material Testing Machine, just can as external advanced person's nano indentation test equipment, have the function of corresponding relation between accurate measurement compression distance and the load.2, the utility model volume simple in structure is little, fitting operation is convenient, be easy to carry, can satisfy various accurate measurements to tiny displacement deforming, the utility model low cost of manufacture particularly, therefore some parts can adopt off-the-shelf, can be in the production scene or testing laboratory, control laboratory, almost each industry widespread use.3, the utility model measuring accuracy height, measurement range is wide especially and can regulate automatically, for example, measurement range has seven indication ranges, be respectively ± 2 μ m, ± 5 μ m, ± 20 μ m, ± 50 μ m, ± 200 μ m, ± 500 μ m, ± 2000 μ m etc., and the test good reproducibility, practical.The utility model not only can be used for the thermometrically of solid material or membraneous material consistency and elasticity modulus, can also be used for other field.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is that the utility model is used for the not load-displacement curve of tempered glass test

Fig. 3 is load-displacement curve that the utility model is used for the tempered glass test

Embodiment

As described in Figure 1, the utility model comprises a connecting seat 1, on Connection Block 1, connect the accurate displacement gauge head 3 that a hardness penetrator 2 and a precision are 100 nanometers side by side, and the head of accurate displacement gauge head 3 is installed to such an extent that slightly protrude the head of hardness penetrator 2, the afterbody of Connection Block 1 has the installing handle 11 of a connection mechanical test machine, and the afterbody of accurate displacement gauge head 3 connects displacement digital display table (not shown) by lead 31.

Connection Block 1 can comprise the fixing Metallic rod 12 of hardness penetrator, one two clamping plate 13 that fuse with Metallic rod 12, hardness penetrator 2 is fixed on the head of Metallic rod 12, accurate displacement gauge head 3 is fixed in the groove that two clamping plate 13 are oppositely arranged by bolt 4, and integral body looks just as the subsidiary little spring pen of a pen.

In the foregoing description, two clamping plate 13 can be to be welded on the Metallic rod 12, also can be directly to process by machine work.

In the various embodiments described above, displacement digital display table and accurate displacement gauge head have off-the-shelf to sell, and the utility model only needs to get final product according to its size design Connection Block 1.

Most important physical parameter with the utility model test is: maximum load, the maximum compression distance of correspondence and the residual depth behind the complete discharge during maximum load.Before use, accurate displacement gauge head 3 is demarcated.Its process is as follows: the displacement of adopting the high-precision electronic balance accurately to test in the telescopic variation process of accurate displacement gauge head concerns with corresponding power value, and makes curve, is referred to as accurate displacement gauge head load-displacement calibration curve.During use, at first the 11 usefulness anchor clamps of the installing handle on the utility model Connection Block 1 are installed on the Mechanics Performance Testing testing machine, regulate accurate displacement gauge head 3 to such an extent that protrude than hardness penetrator 2.Like this, in adding unloading round-robin process, accurate displacement gauge head 3 at first contacts tested sample and is in compressive state.In order to eliminate the asynchronous error that causes of load in process of the test with displacement, make the measurement result of load and displacement accurately corresponding, will be when hardness penetrator 2 contact tested sample, records of values on the displacement digital display table is got off, when final data is handled this numerical value contrast accurate displacement gauge head 3 load-displacement calibration curve is proofreaied and correct last load, displacement.Along with the increase of load, the telescopic variation of accurate displacement gauge head 3 increases, and the numerical value of displacement digital display table is also along with increase.When load reached maximum, the numerical value on the displacement digital display table was the compression distance of maximum load correspondence.When completion of discharge, the shown numerical value of displacement digital display table is residual depth.By adding the unloading cyclic process, just can accurately measure through data processing after load and corresponding displacement.In addition, also can connect communication with computer, the data of collection can be transferred to computing machine by the serial line interface of computing machine.

Further specify the process that the utility model is used to test below by specific embodiment:

Embodiment 1: tempered glass does not add the test that unloads cyclic curve

1, specimen preparation is with the not tempered glass polishing of certain size;

2, the utility model is contained on the multifunctional material mechanics testing machine, then the power supply opening of the subsidiary displacement digital display table of accurate displacement gauge head, all work before being ready to test;

3, begin to add load, the power loading velocity is 0.2N/s in the process of the test.When hardness penetrator 2 contacts not tempered glass, the data recording on the displacement digital display table is got off;

4, when load reaches certain value, the displacement records of values that shows on the displacement digital display table this moment is got off or numerical value is input to storage (can write down the shift value of load correspondence in entire test at any time) in the computer with data line;

5, after off-test, the displacement data of the record of load and correspondence is revised with accurate displacement gauge head load-displacement calibration curve, then revised load and corresponding displacement curve description (as shown in Figure 2).

Embodiment 2: tempered glass add the test that unloads cyclic curve

1, the tempered glass with certain size polishes;

2, carry out according to the test method and the process of the foregoing description 1, obtain the relation of the load displacement of tempered glass, then revised load and corresponding displacement curve description (as shown in Figure 3).

Claims

1, the responsive hardness penetrator device of a kind of displacement, it is characterized in that: it comprises a connecting seat, on described Connection Block, connect a hardness penetrator and an accurate displacement gauge head side by side, and the head of described accurate displacement gauge head slightly protrudes the head of described hardness penetrator, the afterbody of described Connection Block has the installing handle of a connection mechanical test machine, and the afterbody of described accurate displacement gauge head connects the displacement digital display table by lead.

2, the responsive hardness penetrator device of a kind of displacement as claimed in claim 1, it is characterized in that: described Connection Block comprises the Metallic rod of a fixing described hardness penetrator, one two clamping plate that fuse with described Metallic rod, described hardness penetrator is fixed on the head of described Metallic rod, and described accurate displacement gauge head is by in the groove that is bolted to described two clamping plate and is oppositely arranged.

3, the responsive hardness penetrator device of a kind of displacement as claimed in claim 2, it is characterized in that: described two clamping plate and described Metallic rod are integrally welded.

4, according to the responsive hardness penetrator device of the described a kind of displacement of claim 2, it is characterized in that: described two clamping plate and the machine-shaping of described Metallic rod one.