CN211954978U

CN211954978U - Fatigue test device

Info

Publication number: CN211954978U
Application number: CN202020688066.5U
Authority: CN
Inventors: 梁景恒; 郑自芹; 张中东; 于壮壮; 张大江
Original assignee: No52 Institute Of China North Industry Group Yantai Branch Co
Current assignee: No52 Institute Of China North Industry Group Yantai Branch Co
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-11-17
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to a fatigue test device, which is characterized in that the device comprises a bracket, a base and a pressure head, wherein the bracket is vertically fixed with the base, the bracket is provided with a vertical groove and a horizontal groove for accommodating a piece to be tested, and the piece to be tested is fixed on the bracket through a fastener; the base is provided with an adjusting groove, and the adjusting groove is used for adjusting the horizontal distance between the support and the pressure head; the pressure head is used for applying downward test load to the piece to be tested. According to the test device, the vertical groove and the horizontal groove are arranged on the support and are fixed by the fastening piece, so that the sliding of a piece to be tested is avoided, and the accuracy of a test result is ensured; by arranging the adjusting groove, the distance between the support and the pressure head can be adjusted, the test requirements of different force arms are met, and the universality of the device is improved; downward test load is applied to the piece to be tested through the pressure head, so that test errors caused by gravity action in the test process are avoided, and the accuracy of test results is improved.

Description

Fatigue test device

Technical Field

The utility model relates to a mechanical test equipment technical field, concretely relates to fatigue test device suitable for T shape and L shape connect.

Background

Fatigue failure refers to the phenomenon of material failure under alternating stress well below the strength or even yield limit of the material. The fatigue limit of materials or components must be considered when designing parts and engineering structures, and especially, the fatigue limit is more important for some components which are complicated in structure or cannot be integrally formed and are assembled by welding or riveting or other mechanical methods so as to avoid unnecessary property loss or casualties.

In the existing welded or riveted T-shaped or L-shaped joint, the contact area of a weld joint surface weld toe, a weld bead scale pattern, a riveted joint and other mechanical joints is small, and the like, and after the T-shaped or L-shaped joint is stressed, bending moment is generated to enable the stress concentration of the structure to be severer, so that the structural member needs to be subjected to fatigue test verification before being used. Therefore, in order to perform fatigue test on the T-shaped or L-shaped joint subjected to bending moment, a set of fatigue test device is designed to meet the fatigue test requirement of the T-shaped or L-shaped joint.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to current T type or L type connect the problem that can' T carry out fatigue test, provide a fatigue test device.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the fatigue test device is characterized by comprising a support, a base and a pressure head, wherein the support is vertically fixed with the base, the support is provided with a vertical groove and a horizontal groove for accommodating a piece to be tested, and the piece to be tested is fixed on the support through a fastening piece; the base is provided with an adjusting groove, and the adjusting groove is used for adjusting the horizontal distance between the support and the pressure head; the pressure head is used for applying downward test load to the piece to be tested.

The utility model has the advantages that: according to the test device, the vertical groove and the horizontal groove are arranged on the support and are fixed by the fastening piece, so that the sliding of a piece to be tested is avoided, and the accuracy of a test result is ensured; by arranging the adjusting groove, the distance between the support and the pressure head can be adjusted, the test requirements of different force arms are met, and the universality of the device is improved; downward test load is applied to the piece to be tested through the pressure head, so that test errors caused by gravity action in the test process are avoided, and the accuracy of test results is improved.

On the basis of the technical scheme, the utility model discloses a reach the convenience of use and the stability of equipment, can also make following improvement to foretell technical scheme:

further, the pressure head is connected with a force value sensor through an extension rod.

The beneficial effect of adopting the further technical scheme is that: through the stroke that the extension rod adjustment pressure head reciprocated to satisfy and test the piece that awaits measuring of co-altitude, through setting up power value sensor, can accurate control apply the power value on the piece that awaits measuring, guarantee the accuracy of test result.

Further, the adjusting groove is of an inverted T shape.

The beneficial effect of adopting the further technical scheme is that: the support passes through the fastener to be fixed on the base, through setting up the type of falling T adjustment tank, during the use, sets up the fastener in the type of falling T adjustment tank like the head of screw to the realization is fixed the support in the optional position of adjustment tank, under the condition that does not increase any structure, satisfies the experimental requirement of the different arm of force, has saved use cost.

Further, the number of the adjusting grooves is at least one.

The beneficial effect of adopting the further technical scheme is that: a plurality of parallel adjusting grooves can be arranged according to the use condition, so that the stability of the bracket is improved.

Furthermore, one side of the adjusting groove is provided with a graduated scale.

The beneficial effect of adopting the further technical scheme is that: through setting up the scale, realize the accurate control to support displacement, carry out accurate control to the arm of force of the piece that awaits measuring promptly, guarantee the accuracy of test result.

Further, the device also comprises a wedge, and the wedge is used for pressing the piece to be detected.

The beneficial effect of adopting the further technical scheme is that: when the thickness of the piece to be tested is thinner, the wedge is used for compressing the piece to be tested, so that the rigidity of the piece to be tested is increased, and the test error is reduced.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a top view of the bracket and base;

FIG. 4 is a right side view of FIG. 1;

FIG. 5 is a schematic view of example 2;

fig. 6 is a schematic view of fixing an L-shaped test piece outside a bracket.

The reference numbers are recorded as follows: support 1, vertical groove 2, horizontal groove 3, base 4, adjustment tank 5, force value sensor 6, pressure head 7, extension rod 8, wedge 9, the piece 10 that awaits measuring, fastener 11, scale 12.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example 1:

as shown in fig. 1 to 4, a fatigue test device is characterized by comprising a support 1, a base 4 and a pressure head 7, wherein the support 1 can be vertically fixed to the base 4 through screws, the mechanical connection can avoid deformation and the like caused by welding factors, so that the whole structure is stable and vertical, the support 1 is provided with a vertical groove 2 and a horizontal groove 3 for accommodating a to-be-tested piece 10, the to-be-tested piece 10 is T-shaped, the vertical groove 2 and the horizontal groove 3 are arranged on the same support 1, the processing is convenient, the operation is simple, and the stability of the to-be-tested piece 10 can be ensured, the vertical groove 2 and the horizontal groove 3 are rectangular grooves which are perpendicular to each other, so that the limitation on the to-be-tested piece 10 is reduced, the universality of the fatigue test device is improved, and the to-be-tested piece 10 is fixed on the; the piece to be tested 10 is fixed on the bracket 1 through a fastener 11 such as a screw or a bolt, so that the piece to be tested 10 can be prevented from sliding in the vertical groove 2 during testing, and the accuracy of a test result is ensured; an adjusting groove 5 is formed in the base 4, and the adjusting groove 5 is used for adjusting the horizontal distance between the support 1 and the pressure head 7; the indenter 7 is used to apply a downward test load to the piece to be tested 10.

The pressure head 7 is connected with the force value sensor 6 through an extension rod 8. The extension rod 8 can be telescopic so as to meet different stroke requirements of the pressure head 7.

The adjusting groove 5 is of an inverted T shape. Through setting up the adjustment tank of type of falling T, can guarantee that support 1 and pressure head 7 remain the collinear throughout, guarantee experimental accuracy, accessible screw fixes support 1 in the optional position of adjustment tank 5 simultaneously, satisfies the experimental requirement of the different arm of force.

At least one adjusting groove 5 is provided. To ensure the stability of the bracket 1, the adjustment grooves 5 may be provided in parallel three.

And a graduated scale 12 is arranged on one side of the adjusting groove 5. The graduated scale 12 can be formed by engraving on the base 4 on one side of the adjusting groove 5, and the existing graduated scale 12 can also be fixed on one side of the adjusting groove 5, so that the accurate control of the moving position of the support 1 is realized.

The device further comprises a wedge 9, wherein the wedge 9 is used for pressing the piece to be tested 10. The wedge 9 is used for compressing the piece to be tested 10, so that the condition that the test result is inaccurate due to warping of the piece to be tested 10 can be avoided.

Example 2:

as shown in fig. 5 and 6, when the piece to be measured 10 is L-shaped and has a thickness of 5mm or less, the piece to be measured 10 is inserted into the vertical groove 2 and the horizontal groove 3, and the wedge 9 is inserted into the side surface of the vertical groove 2 as required to realize the primary fastening of the piece to be measured 10, so as to improve the rigidity thereof, and then the piece to be measured 10 is fixed on the bracket 1 through the fastener 11; when the thickness of the to-be-tested piece 10 is greater than 5mm, the to-be-tested piece 10 can be inserted into the vertical groove 2 and the horizontal groove 3 and then fixed on the bracket 1 through the fastening piece 11 or directly fixed on the outer side of the bracket 1 through the fastening piece 11, and the rest parts are the same as those in embodiment 1 and are not described again.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The fatigue test device is characterized by comprising a support (1), a base (4) and a pressure head (7), wherein the support (1) is vertically fixed with the base (4), a vertical groove (2) and a horizontal groove (3) for accommodating a piece to be tested (10) are formed in the support (1), and the piece to be tested (10) is fixed on the support (1) through a fastener (11); an adjusting groove (5) is formed in the base (4), and the adjusting groove (5) is used for adjusting the horizontal distance between the support (1) and the pressure head (7); the pressure head (7) is used for applying downward test load to the piece to be tested (10).

2. A fatigue testing device according to claim 1, wherein the indenter (7) is connected to the force value sensor (6) via an extension rod (8).

3. A fatigue testing device according to claim 1, wherein said adjustment groove (5) is of inverted T-shape.

4. A fatigue testing device according to claim 1 or 3, wherein said adjusting groove (5) is at least one.

5. A fatigue testing device according to claim 4, wherein a scale (12) is provided at one side of the adjustment groove (5).

6. A fatigue testing device according to claim 1, further comprising a wedge (9), said wedge (9) being adapted to press said piece (10) to be tested.