CN201107243Y

CN201107243Y - Novel shearing experiment tool

Info

Publication number: CN201107243Y
Application number: CNU2007201002870U
Authority: CN
Inventors: 高卫生; 李书香; 冯知予
Original assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Current assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-08-27
Anticipated expiration: 2017-10-31

Abstract

The utility model relates to a novel shearing test tool set-up, which is characterized in that the shearing test tool set-up comprises an upper foundation seat fixedly connected with a cross beam of a universal testing machine and a lower foundation seat fixedly connected with a machine body of the universal testing machine, wherein, pin holes for installing shearing pins are respectively arranged on the upper and the lower foundation seats, and working positions of the upper and the lower foundation seats are in mutual point symmetry and can be mutually moved along the direction vertical to the axial direction of the shearing pins. The shearing test tool set-up ensures the stretching test and the compressing test of the universal testing machine to be mutually independent, standard compressing accessories are utilized, the structure of the testing machine is not changed, the pulling and shearing test is not mutually interfered with the stretching test but mutually independent instead after being transformed into compressing and shearing, thus the working efficiency is greatly enhanced. The shearing test tool set-up has the advantages of simple structure and convenient operation.

Description

Novel shear test frock

Technical field

The utility model relates to a kind of frock that is used for universal testing machine, particularly a kind of novel shear test frock.

Background technology

In the structural member, mainly bear shearing force, the member that detrusion takes place is called shear component.Member characteristics stressed and distortion when shearing are: act on the lateral external forces on the member two sides the equal and opposite in direction of making a concerted effort, direction is opposite, active line is close, and the member part that makes each self-applying along with the face of the being cut generation changing of the relative positions of force action line parallel.Shear test will be measured maximum changing of the relative positions power and corresponding stress exactly.Break pin is the safety plug of hydro-turbo generator set water guide mechanism, bears shearing force in the work, and when external force reached shear strength during greater than a certain value, break pin fracture took place also sends signal, and genset produces a series of actions, the protection unit safety.The size of the shear strength of break pin is relevant with the mechanical property of material, need carry out engineer testing.The test frock of break pin is for drawing scissors at present.Because mechanical test mainly carries out tension test, so tension test and draw and need often change back and forth frock between the scissor test.When changing, heavy frock needs two people operation, and very inconvenient.

Summary of the invention

The utility model for solve the technical matters that exists in the known technology provide a kind of be used for universal testing machine, do not disturb mutually with tension test, relatively independent novel shear test frock.

The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is: comprise the top base affixed with the universal testing machine crossbeam, the bottom base affixed with the universal testing machine fuselage, upper and lower pedestal all is provided with the pin-and-hole that is used to install break pin, the mutual point symmetry in the working position of upper and lower pedestal can be along perpendicular to the mutual changing of the relative positions of the axial direction of break pin.

The utility model can also adopt following technical scheme:

Described described upper and lower base construction is identical, for split type, comprises by bolted base and column, and the pin-and-hole that break pin is installed is set in the described column.

Described pin-and-hole internal clearance is installed nested ordinatedly.

Described nested internal clearance is erector's encapsulation ordinatedly.

Advantage and the good effect that the utlity model has are: the utility model makes the tension test of universal testing machine and compression test relatively independent, utilize the compression of standard to attach, do not change the structure of testing machine, draw scissor test to change into to press cut after, do not disturb mutually with tension test, relatively independent, improved work efficiency greatly; The utility model is simple in structure, and is easy to operate.

The figure explanation

Fig. 1 is a structural representation of the present utility model;

Sectional arrangement drawing when Fig. 2 is the break pin test.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and cooperation figure is described in detail as follows:

See also Fig. 1, the utility model is made up of a pair of upper and

lower pedestal

1,2, and the structure of upper and lower pedestal is identical, and the working position is mutual point symmetry, and two seat surface opposites closely contact, and can be along perpendicular to the mutual changing of the relative positions of the axial direction of break pin.Pedestal is split type, forms top base 1 by bolt 1-10 connection base 1-9 and column 1-11, forms bottom base 2 by bolt 2-10 connection base 2-9 and column 2-11, is easy to like this guarantee that base is vertical with column, guarantees the vertical direction reinforcing.Be provided for installing the pin-and-hole of break pin in column 1-11, the 2-11.

In order to protect pedestal, prolong its life-span, being used to of can being provided with in column 1-11,2-11 installs in the pin-and-hole of break pin nested 1-2,2-2 are installed, and be nested replaceable as consumable accessory.Pin-and-hole with nested between be clearance fit, promptly not dismantled and assembled by apparatus.

See also Fig. 2, top base 1 attaches I1-4 with standard and is threaded, and it is affixed to attach the crossbeam of I1-4 and universal testing machine by standard; Bottom base 2 attaches II2-8 with standard and is threaded, and it is affixed to attach the fuselage of II2-8 and universal testing machine by standard.Standard attaches 1-4 and standard and attaches when 2-8 dispatches from the factory by testing machine and be with.

The needs of doing experiment for the break pin that satisfies different size, can in nested 1-2,2-2, be equipped with frock cover 1-6, the 2-6 of different size specification, be clearance fit between nested 1-2,2-2, frock cover 1-6,2-6 and break pin 5 threes, promptly not dismantled and assembled by apparatus.Guarantee the open slot of break pin 5 and the faying face isoplanar of two pedestals after assembling is finished, make open slot be subjected to shearing force.

It is relatively independent adopting universal testing machine tension test of the present utility model and compression test.Utilize the compression of standard to attach, do not change the structure of testing machine, draw scissor test to change into to press cut after, do not disturb mutually with tension test, relatively independent, improved work efficiency greatly.

Claims

1. novel shear test frock, it is characterized in that: comprise the top base affixed with the universal testing machine crossbeam, the bottom base affixed with the universal testing machine fuselage, upper and lower pedestal all is provided with the pin-and-hole that is used to install break pin, the mutual point symmetry in the working position of upper and lower pedestal can be along perpendicular to the mutual changing of the relative positions of the axial direction of break pin.

2. novel shear test frock according to claim 1 is characterized in that: described upper and lower base construction is identical, for split type, comprises by bolted base and column, and the pin-and-hole that break pin is installed is set in the described column.

3. novel shear test frock according to claim 1 and 2 is characterized in that: described pin-and-hole internal clearance is installed nested ordinatedly.

4. novel shear test frock according to claim 3 is characterized in that: described nested internal clearance is erector's encapsulation ordinatedly.