CN217638462U

CN217638462U - Overlap joint shear test frock

Info

Publication number: CN217638462U
Application number: CN202221430838.0U
Authority: CN
Inventors: 于轩; 黄浩杰; 李连鹏; 罗辉阳
Original assignee: Capital Aerospace Science And Technology Development Co ltd
Current assignee: Capital Aerospace Science And Technology Development Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-10-21
Anticipated expiration: 2032-06-08

Abstract

The utility model discloses a lap joint shear test tool, which belongs to the technical field of lap joint shear tests and comprises a first clamping connecting part and a second clamping connecting part; the first clamping connecting component comprises an upper clamp body, an upper threaded joint arranged in the upper clamp body, an upper connecting pull rod connected with the upper threaded joint and an upper lapping plate arranged at the lower part of the upper connecting pull rod; the second clamping connecting component comprises a lower clamp body, a lower threaded joint arranged in the lower clamp body, a lower connecting pull rod connected with the lower threaded joint, and a lower overlapping sheet arranged on the upper portion of the lower connecting pull rod. The utility model discloses the pin on the pull rod of connecting on and connecting down can fix a position last overlap joint board and lower overlap joint board, prevents that it from carrying out lateral shifting, guarantees the axiality, and the assurance test is quick, the accuracy goes on.

Description

Overlap joint shear test frock

Technical Field

The utility model belongs to the technical field of the lap joint shear test technique and specifically relates to a lap joint shear test frock is related to.

Background

The lap joint shear test is used for measuring the resistance performance of a material under the action of shear force and is one of basic test methods for the lap joint mechanical performance test; the method is mainly used for testing the lap joint parts bearing shear load, such as the lap joints connected by rivets, bolts, screws or similar fasteners. In order to make the test result as close to the actual situation as possible, the shear test usually uses various shear test devices and corresponding test methods to simulate the working conditions of actual work, and usually the test piece is installed in the installation hole of the clamp body, and the shear force is applied to the test piece until the test piece is broken, so as to measure the shear strength of the test piece. In the lap joint shear test, the shear plane and the test force loading direction are not in the same axis, so that the test result is influenced, and the test is unqualified.

Patent publication No. CN205506581U discloses a combined material compression shear performance test frock, includes: the device comprises an upper joint (1), an upper base (2), an upper connecting bolt and nut (3), an upper positioning plate (4), an upper spherical seat (5), a left loading plate (6), a composite material compression-shear test piece (7), a right loading plate (8), a lower spherical seat (9), a lower connecting bolt and nut (10), a lower positioning plate (11), a lower base (12) and a lower joint (13), and is capable of meeting various requirements of an aircraft composite material compression-shear performance test and increasing test accuracy. However, in the tool, the upper end of the left loading plate is propped against the middle of the notch below the upper spherical seat; the lower end of the right loading plate is supported in the middle of the gap above the lower spherical seat, so that the connection mode is not firm enough, and the experimental result can be influenced once the lower end of the right loading plate is loosened in the test process.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at prior art not enough, provide a lap joint shear test frock, can guarantee lap joint shear test's axiality.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a lap joint shear test tool comprises a first clamping connecting part and a second clamping connecting part; the first clamping connecting component comprises an upper clamp body, an upper threaded joint arranged in the upper clamp body, an upper connecting pull rod connected with the upper threaded joint and an upper lapping plate arranged at the lower part of the upper connecting pull rod; the second clamping connecting component comprises a lower clamp body, a lower threaded joint arranged in the lower clamp body, a lower connecting pull rod connected with the lower threaded joint, and a lower lap joint plate arranged on the upper portion of the lower connecting pull rod.

Furthermore, riveting holes are formed in the upper lapping plate and the lower lapping plate; and the upper lapping plate and the lower lapping plate are riveted with the test piece through the riveting holes.

Further, pin holes are formed in the upper lapping plate and the lower lapping plate, and pins matched with the pin holes are arranged on the upper connecting pull rod and the lower connecting pull rod; the upper lapping plate and the upper connecting pull rod are connected through the pin, and the lower lapping plate and the lower connecting pull rod are connected through the pin.

Furthermore, the upper end of the upper connecting pull rod and the lower end of the lower connecting pull rod are both provided with external threads, and the external threads are matched with the internal threads of the upper threaded joint and the lower threaded joint.

Furthermore, the upper clamp body and the lower clamp body are both provided with clamping grooves, the upper threaded joint is clamped in the clamping groove of the upper clamp body, and the lower threaded joint is clamped in the clamping groove of the lower clamp body.

The utility model has the advantages that: the utility model comprises a first clamping connecting part and a second clamping connecting part, wherein the first clamping connecting part and the second clamping connecting part both comprise a clamp body, a screwed joint, a connecting pull rod and a lap joint; the lap joint plate is connected with the test piece through a rivet, the lap joint plate is connected with the connecting pull rod through a pin, the connecting pull rod is connected with the threaded joint through a thread, and the threaded joint is clamped in the clamp groove. During the use, will go up the riveting hole of overlap joint board and lower overlap joint board and align, pass through the rivet hole riveting with the test piece on last overlap joint board and lower overlap joint board, will go up the threaded end of connecting pull rod and connecting the pull rod down and screw in screwed joint and lower screwed joint respectively, will go up the pin on connecting pull rod and the last connecting pull rod and insert the dowel hole of overlap joint board and lower overlap joint board respectively, go up screwed joint and lower screwed joint and block respectively in the concrete draw-in groove of last anchor clamps and lower anchor clamps at last, close the emergency exit, apply load and test.

The utility model discloses the pin on the pull rod is connected with down to the grafting pull rod can fix a position last overlap joint board and lower overlap joint board, prevents that it from carrying out lateral shifting, guarantees the axiality, and the assurance test is quick, the accuracy goes on.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a lap joint shear test tool before improvement.

Fig. 2 is the utility model discloses the structural schematic diagram of overlap joint shear test frock.

Fig. 3 is a schematic structural view of the lower connecting rod of the present invention.

The meaning of the respective reference numerals is as follows:

1: first mandrel, 2: second mandrel, 3: first strap, 4: second strap, 5: first clamp body, 6: second clamp body, 7: an upper clamp body, 8: lower clamp body, 9: upper threaded joint, 10: lower threaded joint, 11: upper connecting pull rod, 12: lower connecting pull rod, 13: upper lap plate, 14: a lower lap plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings 1 to 3 and specific embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the lap joint shear test tool in the prior art is composed of a first mandrel 1, a second mandrel 2, a first lap plate 3, a second lap plate 4, a first clamp body 5 and a second clamp body 6. The first clamp body 5 and the second clamp body 6 are provided with clamping grooves, the end parts of the clamping grooves in the length direction are provided with clamping groove inlets, and the clamping groove inlets are used for clamping the first core shaft 1 and the second core shaft 2. And a safety door is arranged at the position of the clamping opening and used for preventing the first core shaft 1 and the second core shaft 2 from sliding out.

During the use, align the riveting hole of first lapping plate 3 and second lapping plate 4, pass through the rivet hole riveting with the product on the lapping plate, penetrate the pin hole on first lapping plate 3 and the lapping plate 4 with first dabber 1 and second dabber 2 respectively, then in the draw-in groove of the first anchor clamps body 5 and the second anchor clamps body 6 is blocked respectively with first dabber 1 and second dabber 2, close the emergency exit, apply load and test.

According to the structure, when the device is installed, the first lapping plate 3 and the second lapping plate 4 can move on the first mandrel 1 and the second mandrel 2 along the horizontal direction, so that the shearing surface is not on the testing force axis, the testing result is influenced, and in the test, the first mandrel 1 and the second mandrel 2 have the risk of rotating to be separated from the clamping groove, and the test fails.

Examples

As shown in fig. 2 to 3, the present embodiment provides a lap joint shear test tool, which includes a first clamping connection component and a second clamping connection component; the first clamping connection component comprises an upper clamp body 7, an upper threaded joint 9 arranged in the upper clamp body 7, an upper connection pull rod 11 connected with the upper threaded joint 9, and an upper lapping plate 13 arranged at the lower part of the upper connection pull rod 11; the second clamping connection component comprises a lower clamp body 8, a lower threaded joint 10 arranged in the lower clamp body 8, a lower connection pull rod 12 connected with the lower threaded joint 10, and a lower lapping plate 14 arranged on the upper portion of the lower connection pull rod 12.

Riveting holes are formed in the upper lapping plate 13 and the lower lapping plate 14; the upper lapping plate 13 and the lower lapping plate 14 are riveted with the test piece through the riveting holes.

The upper lapping plate 13 and the lower lapping plate 14 are both provided with pin holes, and the upper connecting pull rod 11 and the lower connecting pull rod 12 are both provided with pins matched with the pin holes; the upper lapping plate 13 and the upper connecting pull rod 11 are connected through pins, and the lower lapping plate 14 and the lower connecting pull rod 13 are connected through pins.

And the upper end of the upper connecting pull rod 11 and the lower end of the lower connecting pull rod 12 are both provided with external threads, and the external threads are matched with the internal threads of the upper threaded joint 9 and the lower threaded joint 10. The upper connecting pull rod 11 is connected with the upper threaded joint 9, and the lower connecting pull rod 12 is connected with the lower threaded joint 10 through threads.

Go up the anchor clamps body 7 and all be equipped with the draw-in groove in the anchor clamps body 8 down, it establishes to go up the nipple of thread 9 card in the draw-in groove of last anchor clamps body 7, nipple of thread 10 card is established down in the draw-in groove of anchor clamps body 8 down, the card mouth department of draw-in groove is equipped with the emergency exit.

During use, riveting holes of the upper lapping plate 13 and the lower lapping plate 14 are aligned, products are riveted on the upper lapping plate 13 and the lower tower connecting plate 14 through rivet holes, the threaded ends of the upper connecting pull rod 11 and the lower connecting pull rod 12 are screwed into the upper threaded joint 9 and the lower threaded joint 10 respectively, pins on the upper connecting pull rod 11 and the lower connecting pull rod 12 are inserted into pin holes of the upper lapping plate 13 and the lower lapping plate 14 respectively, finally, the upper threaded joint 9 and the lower threaded joint 10 are clamped into clamping grooves of the upper clamp body 7 and the lower clamp body 8 respectively, the safety door is closed, and a load is applied to carry out a test.

With the structure, the pins on the upper connecting pull rod 11 and the lower connecting pull rod 12 can position the upper lapping plate 13 and the lower lapping plate 14, so that the upper lapping plate and the lower lapping plate are prevented from moving transversely, and the coaxiality is ensured. Even if the upper threaded connector 9 and the lower threaded connector 10 rotate in the clamping grooves of the upper clamp body 7 and the lower clamp body 8, the upper threaded connector and the lower threaded connector cannot fall out of the clamping grooves, and the test fails. The embodiment eliminates the influence of coaxiality on the test; the tool is prevented from sliding down, so that the test fails.

In the description of the present invention, it is to be understood that relational terms such as "a," "an," "two," and the like are used solely to separate one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. The terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a lap joint shear test frock which characterized in that: comprises a first clamping connecting part and a second clamping connecting part; the first clamping connecting component comprises an upper clamp body, an upper threaded joint arranged in the upper clamp body, an upper connecting pull rod connected with the upper threaded joint and an upper lapping plate arranged at the lower part of the upper connecting pull rod; the second clamping connecting component comprises a lower clamp body, a lower threaded joint arranged in the lower clamp body, a lower connecting pull rod connected with the lower threaded joint, and a lower lap joint plate arranged on the upper portion of the lower connecting pull rod.

2. The lap joint shear test tool of claim 1, characterized in that: riveting holes are formed in the upper lapping plate and the lower lapping plate; and the upper lapping plate and the lower lapping plate are riveted with the test piece through the riveting holes.

3. The lap joint shear test tool according to claim 2, wherein: the upper lapping plate and the lower lapping plate are both provided with pin holes, and the upper connecting pull rod and the lower connecting pull rod are both provided with pins matched with the pin holes; the upper lapping plate and the upper connecting pull rod are connected through the pin, and the lower lapping plate and the lower connecting pull rod are connected through the pin.

4. The lap joint shear test tool according to claim 3, wherein: the upper end of the upper connecting pull rod and the lower end of the lower connecting pull rod are both provided with external threads, and the external threads are matched with the internal threads of the upper threaded connector and the lower threaded connector.

5. The lap joint shear test tool according to claim 4, characterized in that: the upper clamp body and the lower clamp body are both provided with clamping grooves, the upper threaded connector is clamped in the clamping groove of the upper clamp body, and the lower threaded connector is clamped in the clamping groove of the lower clamp body.