CN2355322Y

CN2355322Y - Turnover plate flexere support assembly

Info

Publication number: CN2355322Y
Application number: CN 98228409
Authority: CN
Inventors: 孙良金
Original assignee: Chongqing iron and steel research institute
Current assignee: Chongqing iron and steel research institute
Priority date: 1998-03-06
Filing date: 1998-03-06
Publication date: 1999-12-22
Anticipated expiration: 2008-03-06

Abstract

The utility model relates to a bending support belonging to the matching device of a universal material testing machine used for bending test. The utility model adopts a reverse screw 12 plus a central positioning ring 19 in order to provide accurate positioning and easy adjustment for the bending support. A spring 7 is utilized for elastically positioning a slide block 5 and a turning plate 6, the downward movement of the slide block is enlarged, and a test specimen is easy to bend continuously into a 180 DEG angle at a time. In addition, the trunnion 22 of the turning plate is arranged in a chute 20, the outward movement of the turning plate 5 during unloading is enlarged, and the clamp force of the slide block 6 on the test specimen is further eliminated. The facades of two supporting seats 9 of the utility model are provided with bend angle indicators used for exactly reflecting test condition in time, and the utility model can be also used for the anti-bending test of brittle materials via simple adjustment. The utility model added with functions has simple structure and convenient and safety operation.

Description

Turnover plate type Bending support assembly

The utility model is to be contained in the turnover plate type Bending support that is used to do metal material bending test and beam test on universal testing machine or the pressure testing machine.

The bending test of metal material is generally all carried out on universal testing machine or pressure testing machine.At present, what generally adopt both at home and abroad is a roll-type Bending support, this bearing exists no angle of bend indication in the BENDING PROCESS, the bearing stress condition is poor, general sample can not first order buckling to 180 ° angle, after bending to 180 ° of angle off-loads, sample is difficult takes out, bearing is asked apart from regulating a series of problems such as difficulty, can not be satisfied the requirement of test principle fully.Utility model patent ZL94227143.2 " Bending support " has satisfied the requirement of test principle basically, but still difficulty is regulated in existence, and the angle indication is very inaccurate, takes out sample still than problems such as troubles.The utility model turnover plate type Bending support is to improve on the basis of ZL94227143.2 " Bending support ", has satisfied request for utilization better.

The turnover plate type Bending support adopts the anti-bottom that is installed in bearing along screw mandrel, and establish a locating ring at anti-center along screw mandrel, can accurately locate like this, rotatable again anti-suitable screw mandrel makes symmetrical synchronously inside and outside the moving of two bearings, regulate standoff distance easily, with the sample requirement of adaptive testing difformity and size.For the accurately requirement of test angle of bend and adaptation different model testing machine, increased by an angle display disc and a pointer at right support abutment and turnover panel gudgeon end face, make it in BENDING PROCESS, angle of bend is indicated on left and right both sides simultaneously.By the mean value of two indication angles, determine angle of bend, to guarantee the accuracy of test.In addition, the pillar on the left side of some model testing machine even the display disc on the left side is covered like this, also can be observed angle of bend from the indicator on the right.The wedge block upper surface is processed with tooth, prevent to slide mutually between sample and wedge block, adopt dovetail groove to be slidingly matched between wedge block and turnover panel, locate with spring, the downslide amount of slide block in the time of can increasing sample and bend near 180 ° of angles, wait biglyyer and put the spacing that reduces by two bearings, make the easier one-time continuous of sample bend to 180 ° of angles.Change the hole that the turnover panel gudgeon is installed into inside skewed slot downwards, can be after sample bend to 180 ° of angles during off-load, the turnover panel gudgeon is moved upwardly and outwardly along skewed slot, increased the slide block spacing, eliminated the holding force of slide block to sample.The bottom of two turnover panels has all increased by an edge of a knife, extracts slide block during beam test out, rotates 180 ° of angles with carrying on the turnover panel, make the edge of a knife upwards, and, make two edge of a knife place turnover panel faces keep horizontal levels by the set screw adjusting turnover panel position that is fixed on the bearing step, can do the beam test of hard brittle material.

With reference to the accompanying drawings in conjunction with the bending test process, the turnover plate type Bending support is further described below.

Fig. 1 is the basic structure of turnover plate type Bending support,

Sample bent to the synoptic diagram at 180 ° of angles when Fig. 2 was the test of turnover plate type Bending support;

Fig. 3 is the synoptic diagram that carries out the hard brittle material beam test.

Turnover plate type Bending support assembly, comprise two bearings 9 that are positioned on the universal testing machine down pressing seat 16, be fixed on stay-bolt 11 and anti-suitable screw mandrel 12 on the bearing 9, bearing 9 upper tops have turnover panel 6 and slide block 5, there is a left side the positive front of bearing, right two display panels, bearing 9 bottoms are connected along screw mandrel 12 through anti-, rotate anti-along screw mandrel 12, two bearings can symmetry move synchronously, anti-have a locating ring 19 along screw mandrel 12 middle parts, one garden post plug is arranged at locating ring 19 bottoms, have the wedge block 5 of tooth to be connected with spring 7, the gudgeon of two turnover panels places skewed slot 20, and in the bottom one edge of a knife 18 is arranged all, all there is set screw at the middle part of two bearings, and set screw is installed on the step of bearing 9 centres.At the trial, to be enclosed within anti-garden post plug earlier and insert in the center pit of universal testing machine down pressing seat 16, then, install bearing 9 and other parts on request along the locating ring 19 on the screw mandrel 12 middle part chutes, rotating handwheel is scalable two standoff distance, and the maintenance center is constant.Load onto stay-bolt 11, after choosing suitable standoff distance, tighten stay-bolt nut 10, rotate set screw 8, make the last plane maintenance level of the wedge block 5 on the turnover panel 6, just can test (Fig. 1).In BENDING PROCESS, sample 4 is under the effect of pressure head 3, and along the arc flexural deformation of pressure head flexual center garden, turnover panel rotates synchronously with sample two arms, and pointer rotates with the turnover panel gudgeon, indicates any angle of bend at crooked 0-180 ° angle.When sample 4 bendings during near 180 ° of angles (Fig. 2), slide block 5 moves down along turnover panel 6 under the effect of sample two arm friction force, has reduced two slide block spacings effectively, makes the easier one-time continuous of sample bend to 180 ° of angles.When off-load, pressure head drives wedge block 5 and turnover panel gudgeon 22, and dovetail groove and the skewed slot on the bearing 20 along turnover panel moves upwardly and outwardly respectively, increased the slide block spacing, eliminated the holding force of two bearings to sample, makes sample be easy to take out.

When the beam test of doing hard brittle material (Fig. 3), need take off the slide block 5 on the turnover panel 6, turnover panel 6 is rotated 180 ° of angles, make the edge of a knife 18 upwards, set screw 8 makes two edge of a knife place turnover panel plane maintenance levels, can do the beam test of hard brittle material.

Claims

1. turnover plate type Bending support assembly, comprise two bearings (9) that are positioned on the universal testing machine down pressing seat (16), be fixed on stay-bolt (11) and anti-suitable screw mandrel (12) on the bearing (9), bearing (9) upper top has turnover panel (6) and slide block (5), there is a display panel (1) the positive front of bearing, it is characterized in that, two bearings (9) bottom is connected along screw mandrel (12) through anti-, anti-have a locating ring (19) along screw mandrel (12) middle part, there is the wedge block (5) of tooth to be connected with spring (7), the gudgeon of two turnover panels (22) places skewed slot (20), and an edge of a knife (18) is arranged all in the bottom, all there is set screw (8) at two bearings middle part, and all there is an angle of bend indicator the positive front of two bearings.

2. according to the described turnover plate type Bending support of claim 1 assembly, it is characterized in that having the wedge block (5) of tooth to be connected with spring (7) and turnover panel (6).

3. according to the described turnover plate type Bending support of claim 1 assembly, it is characterized in that a garden post plug is arranged at locating ring (19) bottom.

4. according to the described turnover plate type Bending support of claim 1 assembly, it is characterized in that set screw (8) is installed on the middle step of bearing (9).