CN201615857U - Fatigue tester with reading microscope - Google Patents

Abstract

The utility model discloses a fatigue tester with a reading microscope, comprising a tester rack with guide rod vertical columns; pressing blocks capable of moving from top to bottom are respectively connected on the two parallel guide rod vertical columns fixedly connected on a rack base; the two pressing blocks form a left fixing point and a right fixing point and are connected with quadrangular brackets which are horizontally vertical to the guide rod vertical columns at the two sides and can move from front to back; and the quadrangular brackets are provided with through holes for installing the support of the reading microscope. The fatigue tester has simple structure and convenient manufacture, can adjust the position of the reading microscope by an adjusting support arm and a microscope bracket in X, Y and Z directions, can focus on a test sample, accurately measure the length of the crack of the test sample, and expand the test range of the tester.

Description

The microscopical fatigue tester of tape reading

Technical field

The utility model relates to a kind of fatigue tester of measuring material crack length.

Background technology

The crack growth rate test has obtained widespread use as a kind of test method in a large amount of new material developments and in checking and accepting.In process of the test, need constantly measure the length of crackle.Measuring method has following three kinds at present: 1, direct-reading method (ocular estimate), 2, flexibility method, 3, potential method.In the actual tests process, what the measuring method of crack length was most widely used is direct-reading method and flexibility method.The direct-reading method is directly to follow the tracks of crack tip with reading microscope at the trial, measures optional crack length direct-reading subtraction unit of the prior art constantly and is made up of preceding reading microscope that is positioned at the sample coupon rear and front end and back reading microscope.

For existing direct-reading subtraction unit.On the small test machine, can't install, promptly can not adopt the direct-reading method.On the enough big type of testing machine platform, can adopt reading microscope is placed directly in mode on the testing machine workbench, but the shortcoming of bringing thus is to test the cast iron pedestal that all needs to move reading microscope at every turn, cause great inconvenience to testing crew, and mobile fore-and-aft survey benchmark produces deviation, causes measuring result error to increase.Be to be placed on the testing machine platform because of reading microscope simultaneously, and fatigue tester can produce vibrations unavoidably in process of the test, thereby make microscopical focus constantly change, giving accurately, the measurement crack length causes difficulty.

The metering system that present experimental machine carries is a flexibility method.At present main fatigue rig is the MTS810 testing machine.It is that extensometer is installed on test specimen, by measuring correlation parameter, utilizes formula)

$\mathrm{BE}\frac{2V_1}{P}=15.132+38.196{\mathrm{tg}}^2\left(\frac{\mathrm{\πa}}{2W}\right)$ Obtain crack length after the calculating.But this kind method is to measure indirectly, have error between measurement result and the test legitimate reading, so measurement data often falls under suspicion in industry.Credible, reliable data still must obtain by the direct-reading method.Existing testing machine is the slip rectangular block that is connected column by two parallel columns that connect firmly on the cube with the upper end, and on the slip rectangular block and on the cube, the testing machine frame that the corresponding up and down testing machine upper grip that connects firmly, testing machine lower chuck are formed.

Because the position that this testing machine frame is not installed reading microscope can't be measured in test crack length in real time.And there is not ready-made testing equipment available yet.

In sum, the MTS810 fatigue tester self does not have the microscopical related device of design and installation, therefore need suit measures to local conditions, and the condition of work reforming test machine structure according to testing machine makes it have the function of directly utilizing the reading microscope reading.

The utility model is further improvement and the development to above-mentioned testing machine frame.On existing fatigue tester basis, transform,

Summary of the invention

The purpose of this utility model provides a kind of, low cost of manufacture, simple in structure, easy for installation, can on X, Y, three directions of Z, accurately adjust the position, can microscope be focused on sample, clear, measure the microscopical fatigue tester of tape reading of crack length exactly.

The technical scheme that its technical matters that solves the utility model adopts is: the microscopical fatigue tester of a kind of tape reading, comprise a testing machine frame with guide rod column, it is characterized in that, be connected with the briquetting that can move up and down adjusting respectively two parallel connecting firmly on the guide rod column on the gantry base, two point of fixity about two briquettings form, be connected with the quadrilateral support that moves forward and backward of horizontal vertical both sides guide rod column on the briquetting, this quadrilateral support is provided with the through hole that the reading microscope bearing is installed.

The utility model has following beneficial effect than prior art.

Simple in structure, easily manufactured.Testing machine original function after the improvement is unaffected.Can on X, Y, three directions of Z, adjust the reading microscope position by regulating support arm and microscope stand, and utilize screw retention to locate, thereby microscope is focused on sample, reach and make things convenient for installation microscope, accurately measure the purpose of sample crack length.Enlarged the trial stretch of testing machine.Reading microscope mainly is connected with testing machine by the testing machine column, away from the testing table of vibration, has reduced the number of times of adjusting microscope position, has alleviated the labour intensity of testing crew.The utility model can be installed on the small test machine, has also avoided directly laying simultaneously the defective that reading microscope brings.

Description of drawings

Fig. 1 is the microscopical fatigue tester organigram of the utility model tape reading.

Fig. 2 is the decomposing schematic representation of Fig. 1.

Among the figure: 1 microscope bearing, 2 guide rod columns, 3 briquettings, 4 briquettings, 5, the testing machine column, 6 reading microscopes, 7 contiguous blocks, 8 high-precision hydraulic chucks, 9 testing machine frames.

Embodiment

Consult Fig. 1 Fig. 2, the microscopical fatigue tester of tape reading comprises connecting firmly in support guide rod column 2 and high-precision hydraulic chuck 8 and the testing machine frame on two bearings up and down.On the guide rod column on the gantry base, be connected with the briquetting 3,4 that can move up and down adjusting respectively two parallel connecting firmly.Two briquettings 3,4 are two point of fixity about forming on the guide rod column, and are fastened on testing machine guide rod column 2 by bolt.Be connected with the parallelogram bracket of horizontal vertical both sides guide rod column 2 on briquetting 3,4, this quadrilateral support can move forward and backward.Two ends are contiguous blocks 7 of the quadrilateral support of connection on the diagonal line of quadrilateral support, with the screw location, are screwed 7 position simultaneously after regulating the position.This quadrilateral support is provided with the through hole that reading microscope bearing 1 is installed.Use this through hole can the installation microscope bearing.Manufacture a mounting hole that matches with microscope column in the microscope bearing 1, be screwed microscopical position at last.Stressed excessive in order to prevent column, below briquetting 2, be provided with the cushion block (not shown) that is positioned on the worktable.

In the process that reading microscope is installed, can regulate the front and back position of contiguous block 7 in front and back, thereby realize the adjusting of reading microscope y direction.After contiguous block 7 location, regulate the position, the left and right sides of microscope bearing 1, can realize that the x direction of reading microscope 6 is regulated.Regulate the column upper-lower position of reading microscope 6, can realize the adjusting of z direction.And then realize the position adjustments of microscope X, Y, three directions of Z.

Above-described only is preferred embodiment of the present utility model.Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model principle, can also make some distortion and improvement, such as, the utility model can consider to cancel the briquetting on the edge column, adopts the form of monolateral fixing or runing rest.Perhaps on the enough big type of testing machine platform, can adopt reading microscope is placed directly in mode on the testing machine workbench, but the shortcoming of bringing thus is to test the cast iron pedestal that all needs to move reading microscope at every turn, causes great inconvenience to testing crew.Be to be placed on the testing machine platform because of reading microscope simultaneously, and fatigue tester can produce vibrations unavoidably in process of the test, thereby make microscopical focus constantly change, giving accurately, the measurement crack length causes difficulty.These changes and change should be considered as belonging to protection scope of the present invention.

Claims (2)

1. microscopical fatigue tester of tape reading, comprise a testing machine frame with guide rod column, it is characterized in that, be connected with the briquetting that can move up and down adjusting respectively two parallel connecting firmly on the guide rod column on the gantry base, two point of fixity about two briquettings form, be connected with the quadrilateral support that moves forward and backward of horizontal vertical both sides guide rod column on the briquetting, this quadrilateral support is provided with the through hole that the reading microscope bearing is installed.

2. the microscopical fatigue tester of tape reading as claimed in claim 1 is characterized in that, manufactures a mounting hole that matches with microscope column in the microscope bearing.

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