CN219540654U - Speckle spraying limiting device for uniaxial tensile sample - Google Patents

Abstract

The utility model relates to a single-axis tensile sample speckle spraying limiting device which comprises a symmetrical limiting baffle plate, a symmetrical limiting stop block and a limiting boss, wherein the symmetrical limiting baffle plate is connected with the symmetrical limiting stop block through a bolt, the symmetrical limiting stop block is arranged on the limiting boss, and the symmetrical limiting baffle plate covers the clamping position of a sample to expose the sample speckle spraying position; the utility model overcomes the defects of larger randomness of the traditional method speckle spraying range, can flexibly carry out accurate limit before speckle spraying on the uniaxial tensile samples with different sizes, realizes simultaneous spraying of a plurality of samples, has higher working efficiency, can carry out speckle spraying when the tensile samples are flat, and can carry out speckle spraying on the samples with fixed length by utilizing the staff gauge.

Description

Speckle spraying limiting device for uniaxial tensile sample

Technical Field

The utility model relates to the technical field of speckle spraying, in particular to a single-axis tensile sample speckle spraying limiting device.

Background

With the vigorous development of strain measurement technology, a non-contact strain acquisition system has been gradually applied to the field of uniaxial tensile testing, and the strain acquisition method is mainly used for acquiring full-field strain information by identifying speckle patterns sprayed on the surface of a sample, and before the tensile test starts, the speckle patterns are particularly required to be uniformly sprayed in a deformation area of the sample. However, the current spraying method easily sprays the speckle pattern to the clamping position of the sample, so that the original friction characteristic of the surface of the sample is destroyed, and the clamping area of the sample slips in the stretching process to cause test failure. Accordingly, it is highly desirable for testers to find a device or method that enables precise spray of speckle patterns to ensure the success rate of uniaxial tension testing.

At present, the speckle spraying process is mainly controlled by people, the more sprayed samples are, the larger the distribution range randomness of speckle patterns is, the spraying range of the speckle is difficult to control, once the spraying is carried out on the clamping area of the samples, the samples are scrapped, the working efficiency is very low, and the requirements of scientific research tests cannot be met.

The Chinese patent with publication number of CN108776062B discloses a tensile sample clamping gap adjusting and sample limiting device and a method, wherein the tensile sample clamping gap adjusting and sample limiting device comprises a steering table, a limiting component A, a limiting component B, a positioning seat, a wide positioning table and a locking nut; the steering table, the positioning seat and the wide positioning table are sequentially arranged from top to bottom, the positioning seat realizes circumferential positioning through the positioning boss, and the bottom of the wide positioning table is locked and fixed with the guide rod through the locking nut; limiting components A are respectively arranged on two sides of the positioning seat, limiting components B are respectively arranged on the other two sides of the positioning seat, and wide positioning surfaces are respectively arranged on the periphery of the wide positioning table; the clamping gap and the position of the plate samples with different widths and thickness specifications are accurately controlled, the defect of large manual error caused by manual pushing and sliding adjustment is overcome, the slipping phenomenon can be effectively avoided, the consistency of the front gap and the back gap is ensured, the working efficiency is improved, and the device is particularly suitable for high-speed stretching high-precision tests; but the sample that this patent was aimed at only can get into the anchor clamps to carry out the spraying under the regular shape, and just can spray a sample at every turn, and efficiency is lower.

The Chinese patent with publication number of CN209049622U discloses a limiting device for a spraying box, which comprises a spraying box body, two guide rods horizontally and fixedly arranged in the spraying box body in parallel, wherein the left ends of the two guide rods are provided with left adjusting assemblies, the right ends of the two guide rods are provided with right adjusting assemblies, the middle sections of the two guide rods are provided with up-down adjusting assemblies, and the bottom in the spraying box body is provided with a carrying platform; however, this patent is for spraying fixed shape parts in a spray box and also can only spray one specimen at a time.

Disclosure of Invention

The utility model provides a single-axis tensile sample speckle spraying limiting device, which overcomes the defects of larger randomness of the speckle spraying range and the like of the traditional method, can flexibly carry out accurate limiting before speckle spraying on single-axis tensile samples with different sizes, realizes simultaneous spraying of a plurality of samples, has higher working efficiency, can carry out speckle spraying when flat-plate tensile samples, and can also carry out speckle spraying on samples with fixed lengths by utilizing a staff gauge.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a unipolar tensile sample speckle spraying stop device, includes symmetry limit baffle, symmetry limit stop and spacing boss, symmetry limit baffle passes through bolted connection symmetry limit stop, symmetry limit stop installs on spacing boss, symmetry limit baffle covers sample clamping position, exposes sample speckle spraying department.

Further, the symmetrical limiting baffle plate comprises a left limiting baffle plate a, a middle limiting baffle plate a, a right limiting baffle plate a, a left limiting baffle plate b, a middle limiting baffle plate b and a right limiting baffle plate b, wherein the left limiting baffle plate a, the middle limiting baffle plate a and the right limiting baffle plate a are all of rectangular structures, two sides of the symmetrical limiting baffle plate are respectively provided with bolt holes, and the two sides of the symmetrical limiting baffle plate are connected with each other through bolts, and the connecting part rotates up and down; the left limit baffle b, the middle limit baffle b and the right limit baffle b are all rectangular structures, two sides of the left limit baffle b are respectively provided with bolt holes, the left limit baffle b, the middle limit baffle b and the right limit baffle b are connected through bolts, and the connecting parts rotate up and down; the right bolt hole of the left limit baffle a is tilted upwards to be matched with the left bolt hole of the middle limit baffle a, and the right bolt hole of the middle limit baffle a is bent downwards to be matched with the bolt hole of the right limit baffle a; the right bolt hole of the left limit baffle b is tilted upwards to be matched with the left bolt hole of the middle limit baffle b, and the right bolt hole of the middle limit baffle b is bent downwards to be matched with the bolt hole of the right limit baffle b.

Further, the symmetrical limiting stop is a convex sliding block and is connected with the symmetrical limiting baffle through a bottom bolt, the symmetrical limiting stop is inserted into the limiting boss, and the symmetrical limiting stop slides and stretches along the direction of the limiting boss.

Further, a graduated scale is marked on the limit boss.

Further, a plurality of intermediate limit baffles a and intermediate limit baffles b are correspondingly arranged according to the number of the samples.

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

1) The defect of larger randomness of the traditional method speckle spraying range is overcome, and accurate limit before speckle spraying can be flexibly carried out on the uniaxial tensile samples with different sizes;

2) The simultaneous spraying of a plurality of samples is realized, and the working efficiency is higher;

3) Not only can carry out speckle spraying when a flat plate type tensile sample is adopted, but also can carry out speckle spraying on a sample with a fixed length by utilizing a scale.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the left limiting baffle a and the left limiting baffle b according to the present utility model.

Fig. 3 is a schematic structural view of the intermediate limit stop a and the intermediate limit stop b according to the present utility model.

Fig. 4 is a schematic structural diagram of a second embodiment of the present utility model.

In the figure: 1. left limit baffle a2, right limit baffle a4. of middle limit baffle a3., left limit baffle b5. of middle limit baffle b6., right limit baffle b7. of symmetrical limit stop 8, limit boss 9, sample

Detailed Description

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

fig. 1 is a schematic diagram of the structure of the present utility model. The utility model discloses a single-axis tensile sample speckle spraying limiting device, which comprises a symmetrical limiting baffle, a symmetrical limiting stop 7 and a limiting boss 8, wherein the symmetrical limiting baffle is connected with the symmetrical limiting stop 7 through a bolt, the symmetrical limiting stop 7 is arranged on the limiting boss 8, and the symmetrical limiting baffle covers the clamping position of a sample 9 and exposes the speckle spraying position of the sample 9.

The symmetrical limiting baffle comprises a left limiting baffle a1, a middle limiting baffle a2, a right limiting baffle a3, a left limiting baffle b4, a middle limiting baffle b5 and a right limiting baffle b6, wherein the left limiting baffle a1, the middle limiting baffle a2 and the right limiting baffle a3 are all rectangular structures, and the left limiting baffle b4, the middle limiting baffle b5 and the right limiting baffle b6 are all rectangular structures;

referring to fig. 2, four bolt holes are respectively formed on two sides of the left limit baffle a1 and the left limit baffle b4, the bolt holes are cylindrical holes, the left bolt holes are connected with the left symmetrical limit stop 7 through bolts, the right bolt holes are connected with the middle limit baffle a2 and the middle limit baffle b5 through bolts, and the left limit baffle a1 and the left limit baffle b4 rotate relative to the left symmetrical limit stop 7 and rotate relative to the middle limit baffle a2 and the middle limit baffle b 5; the right bolt hole of the left limit baffle a1 is tilted upwards to be matched with the left bolt hole of the middle limit baffle a2, and the right bolt hole of the left limit baffle b4 is tilted upwards to be matched with the left bolt hole of the middle limit baffle b 5;

referring to fig. 3, four bolt holes are respectively formed on two sides of the middle limit baffle a2 and the middle limit baffle b5, the bolt holes are cylindrical holes, the directions of the 2 bolt holes on the right side are opposite to those of the 2 bolt holes on the left side, the cylindrical holes on the left side are connected with the left limit baffle a1 and the left limit baffle b4 through bolts, and the bolt holes on the right side are connected with the right limit baffle a3 and the right limit baffle b6 and rotate relatively; the right bolt hole of the middle limit baffle a2 is downwards bent to be matched with the bolt hole of the right limit baffle a3, and the right bolt hole of the middle limit baffle b5 is downwards bent to be matched with the bolt hole of the right limit baffle b6.

Two sides of the symmetrical limit stop 7 are respectively provided with a convex sliding block, the convex sliding block is connected with the symmetrical limit baffle through a bottom bolt, the symmetrical limit stop 7 is respectively inserted into the limit boss 8, and the symmetrical limit stop 7 can slide along the direction of the limit boss 8.

And a graduated scale is marked on the limit boss 9.

The middle limit baffle a2 and the middle limit baffle b5 can be correspondingly arranged in a plurality according to the number of the samples 9, so that a left limit baffle a1+N middle limit baffles a2+right limit baffle a3 and a left limit baffle b4+N middle limit baffles b5+right limit baffle b6 are assembled and installed.

The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present utility model, but the scope of the present utility model is not limited to the following examples. The methods used in the examples described below are conventional methods unless otherwise specified.

[ example ]

In the first embodiment, as shown in fig. 1, when it is determined that 3 bone-shaped samples 9 are required to be subjected to stretching and speckle spraying, clamping positions are arranged on the upper side and the lower side of the bone, a left limit baffle a1, a middle limit baffle a2 and a right limit baffle a3 are installed through bolt combination, a left limit baffle b4, a middle limit baffle b5 and a right limit baffle b6 are installed through bolt combination, and are installed with the symmetrical limit stop 7 through bolts after combination, the positions of clamping areas of the symmetrical limit stop 7 to the samples 9 are adjusted, stretching and speckle spraying areas of the samples 9 are reserved, and when accurate speckle spraying distances are required, sliding positions of the symmetrical limit stop 7 are adjusted according to scales on the limit boss 8.

In the second embodiment, as shown in fig. 4, when it is determined that 4 bone-shaped samples 9 are required to be subjected to stretching and speckle spraying, clamping positions are provided on the upper and lower sides of the bone, the left limit baffle a1, the two middle limit baffles a2 and the right limit baffle a3 are assembled by bolts, the left limit baffle b4, the two middle limit baffles b5 and the right limit baffle b6 are assembled by bolts, and then are assembled with the symmetric limit stop 7 by bolts, the positions of the clamping areas of the symmetric limit stop 7 to the samples 9 are adjusted, the stretching and speckle spraying areas of the samples 9 are reserved, and when the accurate speckle spraying distance is required, the sliding positions of the symmetric limit stop 7 are adjusted according to the graduated scales on the limit bosses 8.

Claims (5)

1. The utility model provides a unipolar tensile sample speckle spraying stop device, its characterized in that includes symmetry limit baffle, symmetry limit stop and spacing boss, symmetry limit baffle passes through bolted connection symmetry limit stop, symmetry limit stop installs on spacing boss, symmetry limit baffle covers sample clamping position, exposes sample speckle spraying department.

2. The device for spraying and limiting the speckles of the uniaxial tensile sample according to claim 1, wherein the symmetrical limiting baffle comprises a left limiting baffle a, a middle limiting baffle a, a right limiting baffle a, a left limiting baffle b, a middle limiting baffle b and a right limiting baffle b, wherein the left limiting baffle a, the middle limiting baffle a and the right limiting baffle a are all rectangular structures, two sides are respectively provided with bolt holes, and are connected with each other through bolts, and the connecting part rotates up and down; the left limit baffle b, the middle limit baffle b and the right limit baffle b are all rectangular structures, two sides of the left limit baffle b are respectively provided with bolt holes, the left limit baffle b, the middle limit baffle b and the right limit baffle b are connected through bolts, and the connecting parts rotate up and down; the right bolt hole of the left limit baffle a is tilted upwards to be matched with the left bolt hole of the middle limit baffle a, and the right bolt hole of the middle limit baffle a is bent downwards to be matched with the bolt hole of the right limit baffle a; the right bolt hole of the left limit baffle b is tilted upwards to be matched with the left bolt hole of the middle limit baffle b, and the right bolt hole of the middle limit baffle b is bent downwards to be matched with the bolt hole of the right limit baffle b.

3. The device for spraying and limiting the speckles of the uniaxial tension specimen according to claim 1, wherein the symmetrical limiting stop is a convex slide block and is connected with the symmetrical limiting baffle plate through a bottom bolt, the symmetrical limiting stop is inserted into the limiting boss, and the symmetrical limiting stop slides and stretches along the direction of the limiting boss.

4. The uniaxial tensile specimen speckle spray limiting device of claim 1, wherein the limiting boss is marked with a graduated scale.

5. The device for spraying and limiting the speckles on the uniaxial tensile test sample according to claim 2, wherein a plurality of intermediate limiting baffles a and b are correspondingly arranged according to the number of the test samples.