CN213121376U

CN213121376U - Special clamp for single shear test

Info

Publication number: CN213121376U
Application number: CN202022082411.3U
Authority: CN
Inventors: 王�华; 王玙凡
Original assignee: Shanghai Fasteners & Welding Materials Technology Research Institute Co ltd
Current assignee: Shanghai Fasteners & Welding Materials Technology Research Institute Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-05-04
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a simple shear test special fixture in the machine part field, including relative last simple shear mold and lower simple shear mold that sets up, it passes through connecting bolt and the last clamp splice fixed connection of hydraulic pressure universal tester to go up simple shear mold, clamp splice fixed connection under lower simple shear mold passes through connecting bolt and the hydraulic pressure universal tester down, the corresponding position in side of going up simple shear mold and lower simple shear mold all is equipped with a through-hole and through the bolt sample that awaits measuring and the nut screw connection that awaits measuring. By using the die, the shear test can realize the maximum shear load test of the bolts with corresponding sizes, and the production cost of the die is reduced. All standard specifications (namely 1/2inch to 1 inch) are tested, the laboratory test method is expanded, and on the premise of completely meeting the detection standard, the production cost of the die is reduced, the service life of the die is prolonged, and the long-term development of the health of enterprises is facilitated.

Description

Special clamp for single shear test

Technical Field

The utility model relates to a mechanical structure, in particular to experimental special fixture is cut to list.

Background

The bolt single shear test is a conventional test in bolts specified under the standard ASTM A394-08, and the test method should be performed according to the test method required in ASTM F606-16. The test should be such that the bolt is subjected to a single section shear load. The bolt and nut are assembled on a tester with appropriate tooling and a load is applied and the maximum load until the bolt shears is recorded. The bolt fracture when the test load reaches the maximum load or before the bolt fracture does not reach the maximum load is considered as the maximum shear load of the bolt single shear test. The fracture opening of the bolt after the shear test is a toughness notch without longitudinal cracks. Generally, the bolt shear test is detected by fixing the bolt in a bolt single shear test mold through a special mold. In the detection work, different types of tests are often required due to different strength of bolt standards, in the bolt specified by the standard ASTM A394-08, the bolt is subjected to shearing single-section shearing force in the working state, different from the bolt using environment in the national standard GB/T3098.1-2010, different requirements are required for the test corresponding to the bolt, a single-shearing test is required, and whether the maximum single-shearing load meets the standard requirements is judged by comparing the maximum single-shearing load in the standard ASTM A394-08.

Based on this, the utility model designs a singly cut experimental special fixture to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a singly cut experimental special fixture, under the prerequisite that accords with detection standard completely, have feasibility and the accuracy that reduces mould manufacturing cost, extension mould life and go on the bolt singly cut experiment, be favorable to the healthy long-term development of enterprise.

In order to achieve the above object, the utility model provides a following technical scheme: including relative last single shear die utensil and lower single shear die utensil that sets up, go up single shear die utensil through last connecting bolt and the universal tester of hydraulic pressure on clamp splice fixed connection, clamp splice fixed connection under single shear die utensil and the universal tester of hydraulic pressure down through connecting bolt down, the corresponding position in side of going up single shear die utensil and lower single shear die utensil all is equipped with a through-hole and through the bolt sample that awaits measuring and the nut screw connection that awaits measuring.

As a further aspect of the utility model, it is cylindric appearance to go up single shear die and lower single shear die to alleviate mould weight, be convenient for install and save mould manufacturing cost, under the same atress condition, use still less raw materials, with this reduction mould manufacturing cost and when the installation more light.

As a further scheme of the utility model, go up the simple shear mould and be the design of ladder terminal surface when lower simple shear mould matches to also have better atress situation under the big load environment, the production and processing of the mould of also being convenient for simultaneously, the ladder terminal surface of going up simple shear mould and lower simple shear mould all leaves certain clearance, so that adjust the deviation of going up simple shear mould and lower simple shear mould side through-hole and alignment and reduction owing to hydraulic universal chain drive test machine.

As a further scheme of the utility model, it all has a step plane to go up drawing die and drawing die side down for the bolt sample that awaits measuring is cut to the list, the through-hole is located plane center, and plane size all is greater than the bolt sample loading end size that awaits measuring.

As a further aspect of the present invention, the through hole size with the bolt sample to be tested is corresponding, and the through hole and any surface all have a chamfer.

As a further aspect of the present invention, two washers to be tested have been cup jointed on the bolt sample to be tested to be located the both sides of last list shear die and lower list shear die respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

by using the die, the shear test can realize the maximum shear load test of the bolts with corresponding sizes, and the production cost of the die is reduced. All standard specifications (namely 1/2inch to 1 inch) are tested, the laboratory test method is expanded, and on the premise of completely meeting the detection standard, the production cost of the die is reduced, the service life of the die is prolonged, and the long-term development of the health of enterprises is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a bolt shear test die of the present invention;

FIG. 2 is a sectional view of the bolt shear test mold of the present invention;

fig. 3 is an exploded view of the bolt shear test die of the present invention.

Wherein:

the device comprises an upper hydraulic universal testing machine clamping block 11, a lower hydraulic universal testing machine clamping block 12, an upper connecting bolt 21, a lower connecting bolt 22, an upper single-shear mold 31, a lower single-shear mold 32, a bolt sample 41 to be tested, a bolt connecting nut 42 to be tested, a bolt washer 51 to be tested and a through hole 52.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1-3, the utility model provides a single shear test special fixture, including relative last single shear mold 31 and lower single shear mold 32 that set up, go up single shear mold 31 through last connecting bolt 21 and hydraulic universal tester on clamp splice 11 fixed connection, lower single shear mold 32 through connecting bolt 22 and hydraulic universal tester under clamp splice 12 fixed connection, the corresponding position in side of going up single shear mold 31 and lower single shear mold 32 all is equipped with a through-hole 52 and through the bolt sample 41 that awaits measuring and the nut 42 threaded connection that awaits measuring.

Specifically, the upper single shear die 31 and the lower single shear die 32 are both cylindrical in shape, so that the weight of the dies is reduced, the installation is facilitated, the production cost of the dies is saved, and under the same stress condition, fewer raw materials are used, so that the production cost of the dies is reduced, and the dies are more convenient to install.

Specifically, the upper single shear die 31 and the lower single shear die 32 are designed to be stepped end faces when being matched, so that the upper single shear die 31 and the lower single shear die 32 are better stressed in a large-load environment and are convenient to produce and process, and certain gaps are reserved on the stepped end faces of the upper single shear die 31 and the lower single shear die 32, so that the alignment of the side through holes 52 of the upper single shear die 31 and the lower single shear die 32 is convenient to adjust, and the deviation caused by the transmission of the hydraulic universal chain testing machine is reduced.

Specifically, the side surfaces of the upper single shear die 31 and the lower single shear die 32 are both provided with a step plane for single-shearing the bolt sample 41 to be tested, the through hole 52 is located at the center of the plane, and the plane dimensions are both larger than the bearing surface dimensions of the bolt sample 41 to be tested.

Specifically, the size of the through hole 52 corresponds to that of the bolt sample 41 to be tested, and the through hole 52 and any one surface are chamfered.

Specifically, the bolt sample 41 to be tested is sleeved with two washers 51 to be tested, and the washers are respectively located on two sides of the upper single shear mold 31 and the lower single shear mold 32.

The single shear die that uses like this can carry out the single shear test to the bolt under ASTM A394-08 standard, whether the biggest shear load of test bolt reaches standard requirement, to 1/2inch to 1inch specification bolt of standard requirement, all have the single shear die that corresponds with it, the mould all accords with standard requirement, and single mould only need install additional dual-purpose being used for connecting the bolt that accords with required intensity just can satisfy the use at many equipment, requirement and the bolt that rises experimental requirement is equivalent to the requirement of testing machine, need not to purchase equipment in addition.

The utility model discloses in, through two list shear moulds in order to reach going on smoothly that the bolt list cut the experiment, this mould design is material saving, reduce cost, installation convenient to use, can satisfy the characteristics of continuity of operation etc. and the list that will be difficult to go on originally is cut experimental and can be gone on, is favorable to the healthy long-term development of enterprise.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a single shear test special fixture which characterized in that: including last single shear die utensil (31) and lower single shear die utensil (32) that set up relatively, go up single shear die utensil (31) through last connecting bolt (21) and hydraulic pressure universal tester on clamp splice (11) fixed connection, clamp splice (12) fixed connection under single shear die utensil (32) through connecting bolt (22) and the hydraulic pressure universal tester down, the corresponding position in side of going up single shear die utensil (31) and lower single shear die utensil (32) all is equipped with a through-hole (52) and through the bolt sample (41) that awaits measuring and nut (42) screwed connection that awaits measuring.

2. The special clamp for the single shear test according to claim 1, wherein: the upper single shear die (31) and the lower single shear die (32) are both cylindrical in shape.

3. The special clamp for the single shear test according to claim 1, wherein: the upper single shear die (31) and the lower single shear die (32) are designed to be stepped end faces when matched, and certain gaps are reserved on the stepped end faces of the upper single shear die (31) and the lower single shear die (32).

4. The special clamp for the single shear test according to claim 1, wherein: go up single shear die (31) and lower single shear die (32) side and all have a step plane for bolt sample (41) await measuring, through-hole (52) are located the plane center, and the plane size all is greater than bolt sample (41) bearing surface size await measuring.

5. The special clamp for the single shear test according to claim 1, wherein: the size of the through hole (52) corresponds to that of the bolt sample (41) to be detected, and the through hole (52) and any surface are provided with chamfers.

6. The special clamp for the single shear test according to claim 1, wherein: two washers (51) to be tested are sleeved on the bolt sample (41) to be tested and are respectively positioned on two sides of the upper single shear die (31) and the lower single shear die (32).