CN202393650U

CN202393650U - Tensile strength test clamp

Info

Publication number: CN202393650U
Application number: CN2011203732323U
Authority: CN
Inventors: 王超智; 闫永红; 路章强; 刘爱斌
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2012-08-22
Anticipated expiration: 2021-09-30

Abstract

The utility model relates to a clamp used for conducting tensile tests on products like bolts, which comprises a clamp body (4) provided with a connection shaft (3). A cavity (5) containing an external expanding end portion (1) is arranged in the clamp body (4), and the radial end face shape of the cavity corresponds to the shape of the external expanding end portion (1). When a test piece (2) is clamped, the external expanding end portion (1) of the test piece (2) enters the cavity (5) from an opening (6) on the lateral face of the clamp body (4) and is limited in the cavity (5) under blocking of a limit block (7) fixedly connected with the lower portion of the cavity (5). A protrusion (8) used for blocking axial moving of the external expanding end portion (1) clamped in the cavity (5) is arranged at the position of the opening (6) at the bottom of the clamp body (4). By means of the scheme, the tensile strength test clamp achieves quick clamping of the test piece and avoids damage to workers caused by tensile failure.

Description

The tensile strength test anchor clamps

Technical field

The utility model relates to a kind of anchor clamps that product is carried out tension test, relates in particular to products such as bolt are carried out the tensile strength test anchor clamps that pulling strengrth detects.

Background technology

It is existing when the section bar product is carried out Performance Detection; Tend to analyze its tensile property, when the tensile property of test section bar, can use upper and lower two stretching clamps; After by these two stretching clamps clamping being carried out at the two ends of sample; Do rightabout motion, and then when sample is stretched, can test its tensile property.But the coupling shaft of existing upper and lower clamp body is an integral body with the test body portion, need before the tension test opening with the test fixture body towards a fixing direction, but jaw often is not a correct direction after clamping; Therefore also need unclamp jaw; Again clamp, several after correct direction, could be accomplished the installment work of clamp body up and down until opening repeatedly; Clamp body is too heavy in addition, the manpower of labor and time.

China utility model patent CN201622207U discloses a kind of bolt tension strength test anchor clamps; It comprises two fixture blocks; One of them fixture block is the step circle cylinder, and the end that diameter is big is an installation end, and the end that diameter is little is a pinching end; Be provided with a through hole in installation end one side, this installation end outer face is provided with the mounting groove that connects this through hole; Another fixture block is a right cylinder, at this fixture block one end setting threaded hole coaxial with this fixture block, when adopting this scheme to change the test bolt; Need not take off fixture block, save the operation of mounting box adjustment, improve test efficiency from testing machine; And the site of action bearing capacity of two fixture blocks and testing machine is strong, and difficult quilt is broken, but in this structure; Bolt is carried out fastening when extending out end (like the pad that is connected with bolt thread) with the anchor clamps clamping; This extends out fastener tabs such as end and the clamp body contact site is a platform, sample fracture moment, sample with extend out the end and eject from last clamp body opening part sometimes and hurt sb.'s feelings.

The utility model content

Be to solve the deficiency that exists in the prior art, the utility model provides a kind of tensile strength test anchor clamps that testpieces is carried out rapid-mounted and prevents in Tensile Fracture Process, the staff to be damaged realized.

For realizing above-mentioned purpose; The tensile strength test anchor clamps of the utility model; Be used for when tension test, being installed, comprise the chuck body that is connected with coupling shaft having the testpieces that extends out the end, this chuck body inside be provided with the radial end face shape with extend out end shape corresponding, hold the cavity that extends out the end; When testpieces is installed; The end that extends out of testpieces is entered in the cavity by the opening of chuck body side, and the limited block that is connected below the cavity stop lower limit in cavity, the opening part in the chuck body bottom is provided with being installed on the convexity that moving radially of end stops that extends out in the cavity.

As the qualification to aforesaid way, described convexity and limited block pass through couplet, and in chuck body axially, convex upper surface is higher than the limited block upper surface.

As the further qualification to aforesaid way, described convexity is two, and is symmetricly set on the opening part both sides of chuck body bottom.

As the further qualification to aforesaid way, the end surface shape of described limited block is the annular that forms breach in opening part.

As the qualification to the utility model, chuck body can be set to be threaded with coupling shaft.

As the qualification to the utility model, the radial end face of cavity is shaped as notched circle.

Adopt technique scheme, its effect is following:

1, sets up convexity, in the tension test process, if the testpieces fracture; The breaking portion that this testpieces is arranged in cavity can receive and protruding stop and can not ejected by anchor clamps, to staff's injury, makes anchor clamps spacing more stable to the stretching of expanding part simultaneously when having avoided testpieces tension failure; And when being installed; Only need the end that extends out of testpieces is put in the cavity by the opening of chuck body side, it is simple to operate, efficient to be installed, and effectively raises work efficiency;

2, protrudingly pass through couplet with limited block, and axial in chuck body, convex upper surface is higher than the limited block upper surface; Make anchor clamps convenient when processing and manufacturing; Especially convexity is set to symmetry two in the opening part both sides of chuck body bottom, not only makes anchor clamps more attractive in appearance, and is convenient to moulding.

When 3, chuck body and coupling shaft are set to be threaded, also can separately carry out during to the thermal treatment of these two parts, avoid influencing thermal effectiveness because part thickness difference is excessive; And when anchor clamps being installed to stretching power spare (on the testing machine jaw); After can be earlier chuck body and coupling shaft being connected, the support clamping is on the testing machine jaw, if the opening of body side is not towards test operation person's angle; Only need the rolling clamp body can realize adjustment, time saving and energy saving.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:

Fig. 1 is the one-piece construction synoptic diagram of the utility model;

Fig. 2 is the perspective view of the utility model chuck body;

Fig. 3 is the cut-open view of Fig. 2;

Fig. 4 is first kind of user mode structural representation of the utility model;

Fig. 5 is second kind of user mode structural representation of the utility model.

Among the figure:

1, extends out the end; 2, testpieces; 3, coupling shaft; 4, chuck body; 5, cavity; 6, opening; 7, limited block; 8, convexity; 9, bolt coupling shaft; 10, T shape coupling shaft.

Embodiment

The tensile strength test anchor clamps of the utility model are used for when tension test, being installed to having the testpieces 2 that extends out end 1, and it structurally; By shown in Figure 1; It comprises chuck body 4, and the right side of chuck body 4 is through the coupling shaft 3 that has been threaded, and the effect of coupling shaft 3 is when tension test; Through the testing machine jaw it is clamped, realize that the utility model anchor clamps and testing machine as the stretching propulsion system are connected.

By Fig. 2, shown in Figure 3, be provided with an opening 6 in a side of chuck body 4, this opening 6 extends to the inside of chuck body 4; Make the inside of chuck body 4 form a cavity 5, the radial end face shape of this cavity 5 is corresponding with the shape that extends out end 1 of testpieces 2, in the following description of present embodiment because of being example all with the bolt tension test; And extend out end 1 as the limiting component that bolt and anchor clamps are installed, promptly extend out end 1 can adopt and the bolted circular gasket or the coupling shaft of T shape, again or nut etc.; Therefore; In the present embodiment, the radial end face shape of cavity 5 adopts circular, and it has been included basically and has held the above-mentioned all scenario that extends out end 1.

Enter into the process to realize being installed in the cavity 5 when being connected with the bolt that extends out end 1 by opening 6; Extending out end 1 is installed in the cavity 5 through the limited block 7 that its below is connected; And when guaranteeing that this is installed state with extend out between testpieces 2 that end 1 is connected and the limited block 7 unobstructedly, the end surface shape of limited block 7 is the annular that forms breach in opening 6 places, that is to say; When being installed, with extend out that end 1 links to each other between to enter to the annular of limited block 7 by opening 6 inner.Therefore, extending out the mode that end 1 can be similar to suspension is suspended on the limited block 7.

Be provided with the outstanding convexity 8 of upper surface of relative limit piece 7 at opening 6 places of chuck body 4 bottoms; The effect of this convexity 8 is that the moving radially of end 1 that extend out that is installed in the cavity 5 stopped; On structural design; Present embodiment protrusions 8 is passed through couplet with limited block 7, and is higher than limited block 7 upper surfaces in the upper surfaces axial, protruding 8 of chuck body 4, and protruding 8 the lower surface and the lower surface of limited block 7 are positioned at same plane; And protruding 8 is two, is symmetricly set on the both sides, opening 6 place of chuck body 4 bottoms.

First kind of user mode synoptic diagram by the utility model shown in Figure 4 can be known; In this use-pattern, extend out end 1 and adopt pad, promptly earlier with pad and bolt in bolt one end screw be connected after; The other end threaded portion of bolt screws in bolt coupling shaft 9; Bolt is put into cavity 5 in an end of pad by opening 6 places, pad is installed on the limited block 7, then coupling shaft 1 is connected with the testing machine jaw; Bolt coupling shaft 9 is connected with another testing machine jaw, so far accomplishes being installed of bolt tension test, clamping work.In this structure, also can carry out the wedge load test of bolt, be about to pad and change into taperliner and get final product.

Second kind of user mode synoptic diagram by the utility model shown in Figure 5 can be known, in this use-pattern, adopts the anchor clamps of two the utility model structures; End at bolt screws the connection pad; Make the end that extends out that this pad conduct and first anchor clamps clamp, screw at the other end of bolt and connect T shape coupling shaft 10, with this T shape coupling shaft 10 as extending out the end with second anchor clamps clamps; Respectively pad and T shape coupling shaft 10 are inserted respectively in the cavity 5 of each self-corresponding anchor clamps; After accomplishing being installed of bolt tension test, the coupling shaft 1 with two anchor clamps links to each other with the testing machine jaw respectively, and the bolt tension that can carry out under this state is tested.Need to prove at this; Adopt T shape coupling shaft 10 as bolt extend out the end time, cavity 5 has the size of holding this T shape coupling shaft 10, therefore; When design; After can being considered as all scenario of the member that extends out end 1, set the size of cavity 5 again, so that cavity 5 satisfies the general requirement of various tests.

In the foregoing description; Just list the user mode of having lifted two kinds of the utility model anchor clamps; When concrete the application, the array configuration that extends out the end different, that link to each other with bolt can be set according to different test purposes, all adopt the form of bolt coupling shaft 9 to connect like the two ends of bolt; Or adopt nut to screw connection etc. at an end of bolt, repeat no more at this.

Claims

1. tensile strength test anchor clamps; Be used for when tension test, being installed to having the testpieces (2) that extends out end (1); Comprise the chuck body (4) that is connected with coupling shaft (3); This chuck body (4) inside be provided with the radial end face shape with extend out end (1) shape corresponding, hold the cavity (5) that extends out end (1); To testpieces (2) when being installed; The end (1) that extends out of testpieces (2) is entered in the cavity (5) by the opening (6) of chuck body (4) side, and the limited block (7) that is connected in cavity (5) below stop that lower limit in cavity (5), is characterized in that: the opening (6) in chuck body (4) bottom is located to be provided with to being installed on the convexity (8) that moving radially of end (1) stops that extends out in the cavity (5).

2. tensile strength test anchor clamps according to claim 1 is characterized in that: described convexity (8) and limited block (7) pass through couplet, and in chuck body (4) axially, the upper surface of protruding (8) is higher than limited block (7) upper surface.

3. tensile strength test anchor clamps according to claim 1 and 2 is characterized in that: described convexity (8) is two, and the opening (6) that is symmetricly set on bottom the chuck body (4) is located both sides.

4. tensile strength test anchor clamps according to claim 1 is characterized in that: the end surface shape of described limited block (7) is for locating to form the annular of breach in opening (6).

5. tensile strength test anchor clamps according to claim 1 is characterized in that: described chuck body (4) is threaded with coupling shaft (3).

6. tensile strength test anchor clamps according to claim 1 is characterized in that: the radial end face of described cavity (5) is shaped as notched circle.