CN204718883U - A kind of fixture for arbitrarily angled bending test - Google Patents

Abstract

For a fixture for arbitrarily angled bending test, it relates to a kind of fixture, is specifically related to a kind of fixture for arbitrarily angled bending test.The purpose of this utility model is to provide a kind of fixture for arbitrarily angled bending test, saves angle comparison time, and is suitable for bulge test.The utility model comprises pressure heads mechanism, two rollers, two vertical scales, push rod, two bearings, measures plate, two measure slide blocks, two bolts, horizontal staff, base and fixing slide blocks, base is horizontally disposed with, the upper surface of base is provided with chute along its length, fixing slide block is arranged in the chute of base upper surface, two bearings are disposed side by side on base, horizontal staff arranges the side of base, and horizontal staff center line along its length and base centerline parallel along its length, each bearing is respectively equipped with a vertical scale.The utility model is used for field of machining.

Description

A kind of fixture for arbitrarily angled bending test

Technical field

The utility model relates to a kind of fixture, is specifically related to a kind of fixture for arbitrarily angled bending test, belongs to field of machining.

Background technology

Three point bending test is a kind of important means of experimental material plastic deformation ability, common three point bending test fixture is made up of a roller, base, pressure head three part substantially, base is provided with slideway, two rollers can be fixed by bolts to the appropriate location in slideway, putting into sample between roller and pressure head, testing machine makes sample generation flexural deformation by applying pressure to pressure head.But this test fixture cannot measure the angle of bend tested in test, for the bending test of some predetermined angular, people can only be carried out for comparison by the V-type comparison plate estimating or make this angle, V-type comparison plate can produce comparatively big error in placement and people in the process of comparison, and waste time and energy when batch bending test, affect test findings and test progress to a certain extent.

Utility model content

The object that the utility model is is to provide a kind of fixture for arbitrarily angled bending test, saves angle comparison time, and is suitable for bulge test.

The utility model is the technical scheme taked that solves the problem: the utility model comprises pressure heads mechanism, two rollers, two vertical scales, push rod, two bearings, measure plate, measure slide block for two, two bolts, horizontal staff, base and fixing slide block, base is horizontally disposed with, the upper surface of base is provided with chute along its length, fixing slide block is arranged in the chute of base upper surface, two bearings are disposed side by side on base, and each bearing is connected with fixing slide block respectively by a bolt, horizontal staff arranges the side of base, and horizontal staff center line along its length and base centerline parallel along its length, each bearing is respectively equipped with a vertical scale, and each vertical scale center line along its length all with horizontal staff central axis along its length, measurement plate level is arranged, and the one end measuring plate is connected with a vertical scale by a measurement slide block, the other end measuring plate is connected with another vertical scale by a measurement slide block, one roller is installed at the top of each bearing respectively, described pressure heads mechanism is arranged between two rollers.

The beneficial effects of the utility model are: the utility model passes through formula of mathematical, calculate the minimum point of bend specimen, angle of bend is changed into the vertical scale on a roller, by fixation measuring plate, bending test is made to observe more simple and easy to do, reduce a large amount of personal errors measured angle of bend and bring, for the bending test of fixed angle in enormous quantities, greatly can improve test efficiency.

Accompanying drawing explanation

Fig. 1 is one-piece construction schematic diagram of the present utility model, and in Fig. 1, R represents pressure roller 7 radius; R represents roller 4 radius; B represents bend specimen thickness of slab; L represents the horizontal range at roller 4 center and pressure roller 7 center.H represents Zhi Gun center and the vertical range measuring plate, i.e. vertical scale 5 reading, θ represents angle of bend, and Fig. 2 is the left view of Fig. 1.

Embodiment

Embodiment one: composition graphs 1 and Fig. 2 illustrate present embodiment, described in present embodiment, a kind of fixture for arbitrarily angled bending test comprises pressure heads mechanism, two rollers 4, two vertical scales 5, push rod 6, two bearings 8, measure plate 9, measure slide block 10 for two, two bolts 11, horizontal staff 12, base 13 and fixing slide block 14, base 13 is horizontally disposed with, the upper surface of base 13 is provided with chute along its length, fixing slide block 14 is arranged in the chute of base 13 upper surface, two bearings 8 are disposed side by side on base 13, and each bearing 8 is connected with fixing slide block 14 respectively by a bolt 11, horizontal staff 12 arranges the side of base 13, and horizontal staff 12 center line along its length and base 13 centerline parallel along its length, each bearing 8 is respectively equipped with a vertical scale 5, and each vertical scale 5 center line along its length all with horizontal staff 12 central axis along its length, measure plate 9 to be horizontally disposed with, and the one end measuring plate 9 is connected with a vertical scale 5 by a measurement slide block 10, the other end measuring plate 9 is connected with another vertical scale 5 by a measurement slide block 10, one roller 4 is installed at the top of each bearing 8 respectively, described pressure heads mechanism is arranged between two rollers 4.

Embodiment two: composition graphs 1 and Fig. 2 illustrate present embodiment, described in present embodiment, a kind of pressure heads mechanism of the fixture for arbitrarily angled bending test comprises depression bar 1, wedge 2, catch 3 and pressure roller 7, one end of depression bar 1 is connected with wedge 2, and wedge 2 is connected with pressure roller 7 by catch 3.

The technique effect of present embodiment is: so arrange, and wedge 2 and pressure roller 7 are convenient for changing.Other composition and annexation identical with embodiment one.

Principle of work

The relational expression of angle of bend θ and vertical scale 5 reading H is calculated by trigonometric function:

$H=\frac{sin\frac{\mathrm{\θ}}{2}\·\frac{L}{2}-r-(B+R)(1-cos\frac{\mathrm{\θ}}{2})}{cos\frac{\mathrm{\θ}}{2}}......(1-1)$

Before bending test starts, the position of an adjustment roller, it is made to be symmetrically distributed in horizontal staff 120 both sides, the numerical value of record L, is converted into angle of bend θ by computing formula 1-1 the reading H of vertical scale 5, and then fixation measuring slide block 10 is to location of reading, install and measure plate 9, bend specimen is lain between roller and starts bending test, pressure head press down until bottom sample minimum point concordant with measuring plate, test completes.

Claims (2)

1. the fixture for arbitrarily angled bending test, it is characterized in that: described a kind of fixture for arbitrarily angled bending test comprises pressure heads mechanism, two rollers (4), two vertical scales (5), push rod (6), two bearings (8), measure plate (9), measure slide block (10) for two, two bolts (11), horizontal staff (12), base (13) and fixing slide block (14), base (13) is horizontally disposed with, the upper surface of base (13) is provided with chute along its length, fixing slide block (14) is arranged in the chute of base (13) upper surface, two bearings (8) are disposed side by side on base (13), and each bearing (8) is connected with fixing slide block (14) respectively by a bolt (11), horizontal staff (12) arranges the side of base (13), and horizontal staff (12) center line along its length and base (13) centerline parallel along its length, each bearing (8) is respectively equipped with a vertical scale (5), and each vertical scale (5) center line along its length all with horizontal staff (12) central axis along its length, measure plate (9) to be horizontally disposed with, and the one end measuring plate (9) is connected with a vertical scale (5) by measurement slide block (10), the other end measuring plate (9) is connected with another vertical scale (5) by measurement slide block (10), one roller (4) is installed at the top of each bearing (8) respectively, described pressure heads mechanism is arranged between two rollers (4).

2. a kind of fixture for arbitrarily angled bending test according to claim 1, it is characterized in that: described pressure heads mechanism comprises depression bar (1), wedge (2), catch (3) and pressure roller (7), one end of depression bar (1) is connected with wedge (2), and wedge (2) is connected with pressure roller (7) by catch (3).