KR100392237B1 - Rectangular biaxial tension and shear test machine on plane - Google Patents

Abstract

The present invention is a planar right angle biaxial tensile shear tester that provides a load device with a right angle biaxial on a plane to provide the ease of testing by performing a tension, compression and fracture test using a single tester Regarding, the planar right angle biaxial tensile shear tester (10);

A tensile test part 12 and a shear test part 13 are provided on the tensile test axis P and the shear test axis Q so as to be perpendicular to two axes on the plane of the base 11 having sufficient rigidity;

The tensile and shear test parts (12, 13) and the grip portion 20 for fixing the test object;

A transfer part 40 which transfers the grip part 20 to impart a load;

A load cell (60) installed between the grip portion (20) and the transfer portion (40) and interposed by a load transducer for measuring the load of the grip portion (20);

It is characterized in that it comprises a linear scale (51, 52) installed between the grip portion 20 and the base 11 interposed as a displacement measuring sensor for directly measuring the transfer amount of the grip portion (20).

Description

Planar biaxial tension and shear test machine on plane

The present invention relates to a planar rectangular biaxial tensile shear tester, which can facilitate tensile, compression, and shear testing of small-capacity metals, relatively small rigid materials, nonferrous metals such as aluminum, and brittle glass or ceramics. It relates to the provision of a tester.

In general, a tester for determining the mechanical and destructive properties of a material can test only a single mode (tensile or compressive or torsional), that is, a tensile tester or a tensile tester for one tensile (compression) test. A shear tester or a torsion tester for torsion testing is configured independently, and recently there is a tester that can perform both tension and torsion at the same time. However, there is no tester capable of simultaneous tensile and shear tests.

Such a conventional tester has a disadvantage in that the cost burden of the tester is increased because each tester must be provided according to the object or test element to be tested. In addition, the conventional tester is a mechanical type by a screw or a hydraulic type by a hydraulic in applying a load. Such a tester has a backlash as the load direction is changed and it is difficult to precisely control the displacement. Is difficult.

The present invention has been invented to solve the problems described above, and provide independent two-axis load devices each in a perpendicular direction on a plane to perform tension, compression, and shear tests from a single tester, and backlash for changes in the direction of load. Its purpose is to provide ease of material testing as a tester capable of removal and precise displacement control.

1 is a plan view of a planar rectangular biaxial tensile shear tester to which the technique of the present invention is applied.

FIG. 2 is a cross-sectional view of a planar rectangular biaxial tensile shear tester taken along line AA of FIG. 1; FIG.

3 is a cross-sectional view of a planar rectangular biaxial tensile shear tester taken along line B-B in FIG.

4 is a cross-sectional view of a planar rectangular biaxial tensile shear tester taken along line C-C of FIG.

* Description of the symbols used in the main parts of the drawings *

10; Tester Device

11; Base

20; Grip

21; body

23; Gripper

40; Conveying part

44; motor

45; Ball screw

60; Load cell

Hereinafter, with reference to the accompanying drawings will be described the configuration, operation and effects of the present invention for achieving the above object.

1 is a plan view of a planar rectangular biaxial tensile shear tester to which the technique of the present invention is applied, FIG. 2 is a cross-sectional view of a planar rectangular biaxial tensile shear tester taken along line A-A of FIG. 1, and FIG. 3 is B- of FIG. Sectional drawing of the planar rectangular biaxial tensile shear tester taken along the line B, FIG. 4 is demonstrated together as sectional drawing of the planar rectangular biaxial tensile shear tester taken along the C-C line of FIG.

The planar right angle biaxial tensile shear tester 10 to which the technique of the present invention is applied is applied to a horizontal plane of a thick base 11 having a good rigidity so as to minimize dynamic friction by varying the deflection and operating direction due to its own weight. The tensile test part 12 and the shear test part 13 are installed on the tensile test axis P and the shear test axis Q that are perpendicular to each other.

The tensile and shear test parts 12 and 13 may include a grip part 20 for fixing a test object and a transfer part 40 for transferring the grip part 20 to perform a test, and the grip part 20 and a transfer part ( 40 is installed between the load cell 60 and the grip part 20 and the base 11 interposed by a load converter for measuring the load of the grip part 20 to directly measure the transfer amount of the grip part 20. It is formed of a linear scale (51, 52) interposed by a displacement measuring sensor for.

The grip portion 20 has a plurality of screw holes 22 to fix the gripper 23 suitable for the test material on the upper surface of the rectangular body 21 and the receiving groove 24 for accommodating the gripper 23. ), And an inclined mirror mount 25 is formed on the upper surface of the shear test part 13 body 21 so that the behavior of the material can be observed from the side when the test material is a transparent material.

The sliding block 27 fixed to the body 21 by fixing the sliding rail 26 in the direction of the tensile test axis (P) and shear test axis (Q) on the bottom surface of the body 21 of the grip portion 20 and Combined to allow precise feeding.

The side of the body 21 in the direction parallel to the tensile test axis (P), shear test axis (Q) to prevent the body 21 is twisted by the moment generated by the operation of the opposite side during the test Auxiliary sliding blocks 31 and 32 are further provided.

The auxiliary sliding blocks 31 and 32 are coupled to the auxiliary sliding rails 28 and 29 fixed to the bracket 30 protruding upward from the end of the base 11.

In order to measure the accurate feeding amount of the grip part 20, the linear scales 51 and 52 interposed with the displacement measuring sensor are attached to the base 11, and the main scale 51 is attached to the grip part 20, and the index scale 52 is attached to the grip part 20. To measure the relative displacement of the grip portion 20 relative to the base 11.

The transfer part 40 connected through the grip part 20 and the load cell 60 forms a screw box 41 so that one side is supported by the support 42 which does not allow backlash by two angular bearings, and is opposed to each other. The side has a ball screw 45 connected to the high resolution step or servo motor 44 having the reducer 43 integrally.

The ball screw 45 does not allow backlash generated during the change of direction by using a preload applied to the ball nut, and the ball nut 46 is a tunnel-shaped transfer part bracket fixed on the base 11 ( 47, and the ball screw 45 is conveyed with respect to the drive of the motor 44.

The sliding rails 48 are fixed to both sides of the screw box 41 so as to be coupled to the sliding blocks 49 provided on both inner sides of the transfer part bracket 47 to drive the motor 44 of the ball screw 45. It prevents buckling and maintains accurate conveyance of the conveying part 40.

Looking at the working relationship of the present invention as described above;

The test material is fixed to the gripper 23 fixed to the receiving groove 24 formed in the body 21 of the grip portion 20.

In this state, the tensile test or shear test may be selected to operate the tensile test part 12 or the shear test part 13 installed in the tensile test axis P and the shear test axis Q.

Since the operating relationship between these tensile test parts 12 and shear test parts 13 is the same, one example will be described.

When the fixing of the test material is completed, the motor 44 is operated by the control of a control unit (not shown), and the decelerated power is transmitted to the ball screw 45 through the coupling 53 through the reducer 43. The ball screw 45 is rotated.

Then, the screw box 41, the load cell 60 and the grip part 20 are moved because the ball screw 45 is in a state in which the base 11, the transfer bracket 47, and the ball nut 46 are integrally coupled. do.

As a result of this movement, a load is applied to the test material fixed to the gripper 23 so that a tensile or shear test can be performed, and a load applied to the test material is loaded between the grip part 20 and the transfer part 40. Information is inputted to the control unit, and the feed amount of the grip unit 20 is input from the linear scales 51 and 52 attached to the grip unit 20 and the base 11.

As described above, the motor 44 operates to rotate the ball screw 45 so that the sliding rails 48 and 26 fixed to the bottom surface of the screw box 41 and the body 21 are transferred to the bracket 47 and the base 11. Since it is in a state coupled with the sliding blocks (49, 27) fixed to it can be moved in the direction of the rail accurately.

In particular, the body 21 is twisted by the moment (MZ) generated in the fixed end of the material (axis not working) in the process of operating the motor 44 as described above, that is, the tensile test part 12 When the body 21 of the shear test part 13 generates moments in the direction of the tensile test part 12, when the shear test part 13 operates, the body of the tensile test part 12 operates. (21) generates moment in the direction of the shear test part (13).

This is because the auxiliary sliding block 31 fixed to the side of each body 21 and the auxiliary sliding rails 28 and 29 fixed to the bracket 30 protruding upward of the base 11 are in operation. It can catch the moment that occurs on the side that does not.

In addition, the shear test part 13 has a mirror mount 25, so that when the test material is transparent, the side behavior of the test material during the test can be easily observed through the attached mirror.

Such a present invention;

According to the control method of the control unit, in the case of the tension test part 12, the compression test may be performed by the control in the reverse direction. In the case of the shear test part 13, the positive shear and the negative shear are You can do this by converting the test. In addition, by controlling the tensile test axis (P) and shear test axis (Q) sequentially or simultaneously, the tensile change is applied and then the shear change is applied to generate an artificial mixed mode (tensile and shear) at the same time. By changing the rotation periodically, the shear fatigue test as well as the tensile compressive fatigue test are possible.

As described above, the planar rectangular biaxial tensile shear tester 10 of the present invention can perform various tests according to the control method, so that the ease and precision of material testing can be pursued.

As described above, the present invention provides a load device having a two-axis right angle on a plane so that a tension, compression, and rupture test can be performed using a single tester, thereby providing the ease of testing. It is a big invention.

Claims (4)

A tensile test part 12 and a shear test part 13 are provided on the tensile test axis P and the shear test axis Q so as to be perpendicular to two axes on the plane of the base 11 having sufficient rigidity; The tensile and shear test parts (12, 13) and the grip portion 20 for fixing the test object; A transfer part 40 which transfers the grip part 20 to impart a load; A load cell (60) installed between the grip portion (20) and the transfer portion (40) and interposed by a load transducer for measuring the load of the grip portion (20); Planar right angle biaxial tensile shear tester installed between the grip part 20 and the base 11 and including linear scales 51 and 52 interposed as displacement measuring sensors for directly measuring the feeding amount of the grip part 20. In (10); The grip portion 20 has a plurality of screw holes 22 to fix the gripper 23 suitable for the test material on the upper surface of the rectangular body 21 and the receiving groove 24 for accommodating the gripper 23. ); An inclined mirror mount 25 installed on one side of the body 21 to observe the behavior of the test material from the side; The sliding block which is fixed to the tensile test axis (P) and the shear test axis (Q) in the bottom surface of the body 21 of the grip part 20 and coupled with the sliding rail 26 fixed to the base 11 can move. (27); The side of the body 21 in the direction parallel to the tensile test axis (P), shear test axis (Q) to prevent the body 21 is twisted by the moment generated by the operation of the opposite side during the test Planar right angle biaxial tensile shear tester, characterized in that it comprises an auxiliary sliding block (31,32) coupled to the auxiliary sliding rail (28,29) fixed to the bracket (30). delete The method of claim 1; The transfer part 40 forms a screw box 41 so that one side is supported by a support 42 which does not allow backlash, and the opposite side is connected to a high resolution motor 44 having the reducer 43 integrally therewith. 45; The ball nut 46 of the ball screw 45 is fixed to a tunnel-shaped transfer part bracket 47 fixed on the base 11 so that the ball screw 45 is transferred with respect to the drive of the motor 44; The sliding rails 48 are fixed to both sides of the screw box 41 so as to be coupled to the sliding blocks 49 provided on both inner sides of the transfer part bracket 47 to drive the motor 44 of the ball screw 45. Planar right angle biaxial tensile shear tester, characterized in that to prevent buckling and to maintain accurate conveyance of the conveying portion (40). The method of claim 1; The plane right angle biaxial tensile shear tester 10 controls the tensile test axis (P) and the shear test axis (Q) sequentially or simultaneously under the control of the control unit to give a tensile change and then give a shear change to artificially test the test material. Generating mixed modes (tensile and shear) simultaneously; Periodically changing the rotation of the motor 44 is a flat rectangular biaxial tensile shear tester, characterized in that to enable a tensile compression test and a shear fatigue test.