CN219417007U - Clamp for testing machine test - Google Patents

Abstract

The utility model discloses a clamp for a test of a testing machine, belongs to the field of clamps, and aims to improve efficiency. The device comprises a base, a right sample placing rack, a left sample placing table and a right sample placing table; a left baffle is arranged on the left side of the left sample placing table, the top end of the left baffle extends upwards and exceeds the top end of the left sample placing table, and the distance from the supporting center line of the left sample placing table to the inner side surface of the left baffle is equal to the placing distance of the edge of the sample; the right baffle is arranged on the right side of the right sample placing table, the top end of the right baffle extends upwards and exceeds the top end of the right sample placing table, and the distance from the supporting center line of the right sample placing table to the inner side surface of the right baffle is equal to the placing distance of the edge of the sample. The method saves the process of drawing lines on the sample, omits the corresponding manual adjustment process, greatly shortens the average experiment time, improves the experiment errors caused by naked eye measurement and operation due to the centering adjustment of the tool, and improves the experiment accuracy.

Description

Clamp for testing machine test

Technical Field

The utility model relates to the field of clamps, in particular to a clamp for testing a testing machine.

Background

The electronic universal testing machine is a new-generation double-space microcomputer control electronic universal testing machine specially designed for universities and scientific research institutions, and can be applied to product quality inspection, technical supervision, ferrous metallurgy, scientific research institutions, universities, aerospace, mechanical manufacturing, automobile production, electronic appliances, rubber plastics, textile chemical fibers, wires and cables, packaging materials, instruments and meters, medical instruments, building material ceramics, petrochemical industry and other industries. The main machine and auxiliary tool of the testing machine are attractive in design appearance, stable and reliable in performance and capable of meeting national and international related standards. The sample fixture of the microelectronic control universal test press for placing samples is shown in fig. 1, and comprises a base 1, wherein a chute 1A transversely penetrating through the base 1 is arranged on the base 1, a left sample placing rack 2 and a right sample placing rack 3 are inserted into the chute 1A, and the left sample placing rack 2 and the right sample placing rack 3 are transversely and movably connected in the chute 1A along the base 1; a left sample placing table 4 is arranged at the top end of the left sample placing frame 2, and a right sample placing table 5 is arranged at the top end of the right sample placing frame 3. The left sample placing rack 2 is used for supporting the left sample placing table 4 and driving the left sample placing table 4 to move along the chute 1A. Similarly, the right sample placing rack 3 is used for supporting the right sample placing table 5 and driving the right sample placing table 5 to move along the chute 1A. The left sample placing stage 4 and the right sample placing stage 5 respectively lift the sample from the bottom of the sample in the sample lateral direction. Typically, the left sample placement stage 4 and the right sample placement stage 5 are cylindrical, and both ends thereof are hinged to the corresponding left sample placement frame 2 and right sample placement stage 5 along the longitudinal direction of the base 1. The distance between the centers of the circles is the span between the left sample placement stage 4 and the right sample placement stage 5. Through the left sample rack 2 and the right sample rack 3 moving on the base 1, the span between the left sample rack 4 and the right sample rack 5 can be adjusted to adapt to samples with different length sizes.

The defect is that before the pressure test is carried out, the position of the sample needs to be manually adjusted after the sample is placed on the base, so that the 5mm positions at the two ends of the sample are aligned with the center of the cylinder on the base, the span needs to be manually measured by using a vernier caliper, and then the sample placing frame above the base needs to be manually moved, so that the center of the sample placing frame is aligned with the pressure rod above the base, and the sample placing frame is very complicated and long in time.

Disclosure of Invention

The utility model aims to provide a clamp for testing a testing machine, which saves working procedures, shortens the experimental duration and improves the efficiency.

The technical scheme adopted by the utility model is as follows: the clamp for testing the testing machine comprises a base, wherein a chute which is transversely penetrated along the base is arranged on the base, a left sample placing rack and a right sample placing rack are inserted in the chute, and the left sample placing rack and the right sample placing rack are transversely and movably connected in the chute along the base; a left sample placing table is arranged at the top end of the left sample placing rack, and a right sample placing table is arranged at the top end of the right sample placing rack; a left baffle is arranged on the left side of the left sample placing table, the bottom end of the left baffle is fixed on the left sample placing rack, the top end of the left baffle extends upwards and exceeds the top end of the left sample placing table, and the distance from the supporting center line of the left sample placing table to the inner side surface of the left baffle is equal to the placing distance of the edge of the sample; the right baffle is arranged on the right side of the right sample placing table, the bottom end of the right baffle is fixed on the right sample placing rack, the top end of the right baffle extends upwards and exceeds the top end of the right sample placing table, and the distance from the supporting center line of the right sample placing table to the inner side surface of the right baffle is equal to the placing distance of the edge of the sample.

Further, a left vertical plate is fixedly connected to the left end of the base along the transverse direction, and a right vertical plate is fixedly connected to the right end of the base; a pair of left compression springs are connected between the left vertical plate and the left sample placing rack; a pair of right compression springs are connected between the right vertical plate and the right sample placing frame.

Further, the left compression spring is detachably connected between the left vertical plate and the left sample placing frame; the right compression spring is detachably connected between the right vertical plate and the right sample placing frame.

Further, a pair of left compression springs are arranged longitudinally along the base; a pair of right compression springs longitudinally arranged along the base; and the central axes of the left compression spring and the right compression spring are coplanar.

Further, through holes are formed in the corresponding positions of the right vertical plate and the right baffle plate, the staff gauge is movably inserted into the through holes along the base in the transverse direction, the left end of the staff gauge is fixed to the right baffle plate, and the left section of the staff gauge is located outside the right vertical plate; and a section of the scale outside the right vertical plate is provided with a caliper reader, and the caliper reader is propped against the outer side of the right vertical plate and is movably connected with the scale along the transverse direction of the scale.

Further, the caliper reader is an electronic automatic reader.

Further, the left sample placing rack and the right sample placing rack are L-shaped and comprise square feet and square legs; the left sample placing frame and the right sample placing frame are arranged in a mirror image mode, and the legs of the left sample placing frame and the legs of the right sample placing frame are arranged adjacently.

The beneficial effects of the utility model are as follows: the utility model saves the process of drawing lines on the sample, and can dispense with the corresponding manual adjustment process by only placing the sample on a sample table, so that the average experiment time is greatly shortened, and the experimental error caused by naked eye measurement and operation is improved and the experimental accuracy is improved due to the centering adjustment of the tool.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a front view of the present utility model;

fig. 4 is a top view of the present utility model.

In the figure, a base 1, a chute 1A, a left sample placing rack 2, a right sample placing rack 3, a foot 2A, a leg 2B, a left sample placing table 4, a right sample placing table 5, a left baffle 6, a right baffle 7, a left standing plate 8, a right standing plate 9, a left compression spring 10, a right compression spring 11, a scale 12, and a caliper reader 13.

Detailed Description

The utility model is further illustrated in the following figures and examples, in which:

in the present utility model, the terms "top," "bottom," "left," and "right," etc. refer to an orientation or positional relationship based on that shown in fig. 2, for convenience of description of the present utility model, and are not intended to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

The conventional clamp for testing a testing machine is shown in fig. 1, and comprises a base 1, wherein a chute 1A which is transversely penetrated along the base 1 is arranged on the base 1, a left sample placing rack 2 and a right sample placing rack 3 are inserted into the chute 1A, and the left sample placing rack 2 and the right sample placing rack 3 are transversely and movably connected in the chute 1A along the base 1; a left sample placing table 4 is arranged at the top end of the left sample placing frame 2, and a right sample placing table 5 is arranged at the top end of the right sample placing frame 3.

The left sample placing rack 2 is used for supporting the left sample placing table 4 and driving the left sample placing table 4 to move along the chute 1A. Similarly, the right sample placing rack 3 is used for supporting the right sample placing table 5 and driving the right sample placing table 5 to move along the chute 1A. The left sample placing stage 4 and the right sample placing stage 5 respectively lift the sample from the bottom of the sample in the sample lateral direction. Typically, the left sample placement stage 4 and the right sample placement stage 5 are cylindrical, and both ends thereof are hinged to the corresponding left sample placement frame 2 and right sample placement stage 5 along the longitudinal direction of the base 1. The distance between the centers of the circles is the span between the left sample placement stage 4 and the right sample placement stage 5. Through the left sample rack 2 and the right sample rack 3 moving on the base 1, the span between the left sample rack 4 and the right sample rack 5 can be adjusted to adapt to samples with different length sizes.

Because of the fixture for testing of the traditional testing machine, before the sample is placed on the left sample placing table 4 and the right sample placing table 5, marking lines extending longitudinally along the sample need to be drawn at the positions of the left side and the right side of the sample, which are 5mm away from the side lines, of the sample, after the sample is placed on the left sample placing table 4 and the right sample placing table 5, the marking lines on the left side of the sample are aligned with the cylindrical center line of the left sample placing table 4 by taking the two drawn marking lines as references, and the marking lines on the left side and the cylindrical center line of the left sample placing table 4 are positioned in the same vertical plane; and the right marking line is aligned with the cylindrical center line of the right sample placing stage 5, so that the right marking line and the cylindrical center line of the right sample placing stage 5 are positioned in the same vertical plane. Not only is the line drawn troublesome, but also a great deal of time is consumed in the adjustment process of centering the marking line and the center of the cylinder, and the whole process is cumbersome in operation.

In order to solve the above problems, the present utility model, as shown in fig. 2 or fig. 3 and 4, has been modified in the conventional structure as follows: a left baffle plate 6 is arranged on the left side of the left sample placing table 4, the bottom end of the left baffle plate 6 is fixed on the left sample placing frame 2, the top end extends upwards and exceeds the top end of the left sample placing table 4, and the distance from the supporting center line of the left sample placing table 4 to the inner side surface of the left baffle plate 6 is equal to the placing distance of the sample edge; the right baffle 7 is arranged on the right side of the right sample placing table 5, the bottom end of the right baffle 7 is fixed on the right sample placing frame 3, the top end extends upwards and exceeds the top end of the right sample placing table 5, and the distance from the center line of the support of the right sample placing table 5 to the inner side surface of the right baffle 7 is equal to the placing distance of the edge of the sample. So set up, place left sample and place platform 4 and right sample and place platform 5 back with the sample, the left end of sample supports left baffle 6, the right-hand member of sample supports right baffle 7, need not to draw the line in advance, also need not artifical manual regulation, just can guarantee that the sample left end surpasss left sample and place 4 cylinder center one sample edge of platform and place the distance, the sample right-hand member surpasss right sample and place 5 cylinder center one sample edge of platform and place the distance, sample edge place the distance can adopt 5mm as above, also can be other required distances. The operation is simple, the scribing process is saved, and the complicated adjusting process is simplified.

After the samples are placed on the left sample placing table 4 and the right sample placing table 5, the left sample placing frame 2 and the right sample placing frame 3 need to be integrally moved, so that the longitudinal center line of the samples along the transverse center coincides with the center of the pressure rod above the sample frame, and uniform stress is realized. The traditional mode is that the center line of sample length and width is drawn on the sample, then the left sample rack 2 and the right sample rack 3 are moved to adjust, the line drawing is troublesome, the adjustment process also consumes a lot of time, the operation of the whole process is tedious, and whether centering is observed by naked eyes of operators or not, and the error is larger.

When the sample rack is used, the center line of the pressure rod above the sample rack extending along the longitudinal direction is aligned with the center line of the base 1 extending along the longitudinal direction, and the center line of the sample length to be adjusted is aligned with the center line of the pressure rod, so that the center line of the sample length to be adjusted can be aligned with the center line of the base 1 extending along the longitudinal direction directly. In order to avoid the limitation caused by scribing and the like, in the utility model, the left end of the base 1 is fixedly connected with a left vertical plate 8 along the transverse direction, and the right end of the base 1 is fixedly connected with a right vertical plate 9; the left vertical plate 8 and the right vertical plate 9 are symmetrical with respect to a center line of the base 1 extending in the longitudinal direction; a pair of left compression springs 10 are connected between the left vertical plate 8 and the left sample placing frame 2; a pair of right compression springs 11 are connected between the right vertical plate 9 and the right sample placing frame 3; the left compression spring 10 and the right compression spring 11 are identical in specification.

It should be noted that, the left compression spring 10 and the right compression spring 11 are all springs with the same specification, that is, the length, the elastic coefficient and other parameters are the same, and the connection modes of other components are the same, so as to ensure that the acting forces of the same length are equivalent.

This setting, because left compression spring 10 and right compression spring 11 are in the compression state, when not using, left compression spring 10 and right compression spring 11 can extrude left sample rack 2 and right sample rack 3 to the inboard laminating of left sample rack 2 and right sample rack 3 to intermediate position. When the sample is placed on the left sample placing table 4 and the right sample placing table 5, the left sample placing frame 2 and the right sample placing frame 3 are appropriately separated according to the length dimension of the sample, at this time, the left compression spring 10 is compressed to the left, the right compression spring 11 is compressed to the right, and the left compression spring 10 and the right compression spring 11 are automatically adjusted to have the same pressure on both sides, so that the center line of the length of the sample is automatically aligned with the center line of the pressure rod. The whole operation process only needs to place the sample on the left sample placing table 4 and the right sample placing table 5, the operation is simple, the line drawing operation and the complicated adjusting process are avoided, the error caused by the artificial visual deviation can be avoided, and the centering accuracy is higher.

Considering that the experimental data are inaccurate due to fatigue of the spring after multiple uses, it is preferable that the left compression spring 10 is detachably connected between the left vertical plate 8 and the left sample rack 2 for easy replacement; the right compression spring 11 is detachably connected between the right vertical plate 9 and the right sample placing frame 3. Bolts are respectively fixed at two ends of the left compression spring 10 and the right compression spring 11, and are connected with the corresponding left vertical plate 8, right vertical plate 9, left sample placing frame 2 and right sample placing frame 3 through bolts.

In order to prevent the left and right sample holders 2 and 3 from being deflected during movement and to improve the stability of movement of the left and right sample holders 2 and 3, it is preferable that a pair of left compression springs 10 are arranged longitudinally along the base 1; a pair of right compression springs 11 are arranged longitudinally along the base 1; and the central axes of the left compression spring 10 and the right compression spring 11 are coplanar.

When the sample is accurately placed on the left sample placing stage 4 and the right sample placing stage 5, the span between the left sample placing stage 4 and the right sample placing stage 5 needs to be measured for subsequent operations such as analysis of test data. The traditional mode is to directly measure by adopting a vernier caliper. The vernier caliper has a great disadvantage in that the positions of the centers of the circles of the left sample placing table 4 and the right sample placing table 5 need to be determined by naked eyes, so that the error of the data measurement result is large.

In order to solve the above problems, in the present utility model, through holes are provided at corresponding positions of the right vertical plate 9 and the right baffle plate 7, the scale 12 is movably inserted into the through holes along the base 1, the left end of the scale 12 is fixed to the right baffle plate 7, and the left section is located outside the right vertical plate 9; and a section of the scale 12 positioned outside the right vertical plate 9 is provided with a caliper reader 13, and the caliper reader 13 is abutted against the outer side of the right vertical plate 9 and is transversely and movably connected with the scale 12 along the scale 12. The arrangement of this structure makes it easy to read the compression X of the springs before and after the left and right sample holders 2, 3 have been kept stable. Using equation 2 (X-5) =d, the span can be calculated as D. This setting need not to look for the position of the centre of a circle of left sample placement stage 4 and right sample placement stage 5, and the measurement is faster, and the precision is higher moreover.

Preferably, the caliper reader 13 is an electronic automatic reader. The automatic reader can automatically display data, and is more convenient to use.

The left sample placing rack 2 and the right sample placing rack 3 are L-shaped and comprise square feet 2A and square legs 2B; the left sample holder 2 and the right sample holder 3 are arranged in mirror image, and the leg portions 2B of the left sample holder 2 and the right sample holder 3 are disposed adjacently. The foot 2A is mainly used for being connected with the base 1, for example, a chute of the base 1 is in an inverted T shape, after a bolt slides in from the end of the chute, the head of the bolt is clamped in the chute of the base 1, and the rod part sequentially passes through an opening of the chute and the foot 2A and is screwed with a nut. The left sample placing rack 2 and the leg 2B of the right sample placing rack 3 are adjacently arranged, so that the left sample placing table 4 and the right sample placing table 5 are more beneficial to being ensured to be close, and the length range of the adapted samples is wider.

Comparative example:

taking the same batch of water permeable bricks meeting the national standard, measuring the length, width and height of the sample by using a vernier caliper, drawing vertical lines at the positions of 5mm on the left side and the right side of the sample by using a pencil, and drawing the center lines of the length and the width of the sample. Then, the sample is placed on a sample holder of a conventional fixture for testing by a testing machine, and the sample holder is moved so that lines of 5mm on the left and right sides of the sample coincide with the center line of the cylinder on the sample table. The sample holder is then moved in its entirety to align the center line of the sample with the pressure bar above the sample holder. And measuring the distance between the circle centers of the two cylinders on the sample rack by using the vernier caliper again. After the width, height and span of the sample are input into the computer and other parameters are set, the flexural strength of the sample is tested, and finally the flexural strength of the sample is obtained.

Example 1:

the same lot of water permeable bricks as the comparative example were taken and mounted on the same experimental machine as the comparative example with the modified apparatus for strength test. The width and height of the sample were measured with a vernier caliper. Next, the sample is placed on the sample stage, at which point the reading X on the display on the right side of the sample stage is read out and the span is calculated using equation 2 (X-5) =d. Finally, inputting the width, length and span of the sample on a computer, setting other parameters, and starting to measure the flexural strength of the sample to obtain the flexural strength of the sample.

By timing, the average duration of the test in the comparative example was found to be about 6 minutes, while the average duration of the test in example 1 was found to be about 3 minutes. The experimental duration of example 1 was reduced by about half compared to the comparative example.

In conclusion, according to the utility model, the average experimental time after the improvement of each manual adjustment procedure can be saved by only placing the sample on the sample table, and the experimental time is greatly saved. And because of the realization of automation, experimental errors caused by various macroscopic measurement and operation before improvement are improved, and the accuracy of the experiment is greatly improved.

The utility model relates to a clamp for testing a testing machine, which is mainly used for testing stretching, compressing, bending and the like of metal and nonmetal materials. Is suitable for ferrous metallurgy, construction materials, aerospace, quality supervision, teaching and scientific research and the like.

Claims (7)

1. The clamp for the test of the testing machine comprises a base (1), wherein a chute (1A) transversely penetrating through the base is arranged on the base (1), a left sample placing rack (2) and a right sample placing rack (3) are inserted into the chute (1A), and the left sample placing rack (2) and the right sample placing rack (3) are transversely and movably connected in the chute (1A) along the base (1); a left sample placing table (4) is arranged at the top end of the left sample placing frame (2), and a right sample placing table (5) is arranged at the top end of the right sample placing frame (3); the method is characterized in that: a left baffle (6) is arranged on the left side of the left sample placing table (4), the bottom end of the left baffle (6) is fixed on the left sample placing rack (2), the top end of the left baffle extends upwards and exceeds the top end of the left sample placing table (4), and the distance from the supporting center line of the left sample placing table (4) to the inner side surface of the left baffle (6) is equal to the placing distance of the edge of a sample; the right baffle (7) is arranged on the right side of the right sample placing table (5), the bottom end of the right baffle (7) is fixed on the right sample placing rack (3), the top end of the right baffle extends upwards and exceeds the top end of the right sample placing table (5), and the distance from the supporting center line of the right sample placing table (5) to the inner side surface of the right baffle (7) is equal to the placing distance of the edge of the sample.

2. The fixture for testing a testing machine according to claim 1, wherein: a left vertical plate (8) is fixedly connected to the left end of the base (1) along the transverse direction, and a right vertical plate (9) is fixedly connected to the right end of the base (1); the left vertical plate (8) and the right vertical plate (9) are symmetrical relative to the central line of the base (1) extending along the longitudinal direction;

a pair of left compression springs (10) are connected between the left vertical plate (8) and the left sample placing rack (2); a pair of right compression springs (11) are connected between the right vertical plate (9) and the right sample placing rack (3); the specifications of the left compression spring (10) and the right compression spring (11) are the same.

3. The fixture for testing a testing machine according to claim 2, wherein: the left compression spring (10) is detachably connected between the left vertical plate (8) and the left sample placing frame (2); the right compression spring (11) is detachably connected between the right vertical plate (9) and the right sample placing frame (3).

4. A fixture for testing a testing machine as claimed in claim 2 or 3, wherein: a pair of left compression springs (10) arranged longitudinally along the base (1); a pair of right compression springs (11) arranged longitudinally along the base (1); and the central axes of the left compression spring (10) and the right compression spring (11) are coplanar.

5. A fixture for testing a testing machine as claimed in claim 1, 2 or 3, wherein: through holes are formed in the corresponding positions of the right vertical plate (9) and the right baffle plate (7), the staff gauge (12) is transversely movably inserted into the through holes along the base (1), the left end of the staff gauge is fixed to the right baffle plate (7), and the left section of the staff gauge is located outside the right vertical plate (9); and a section of the scale (12) positioned outside the right vertical plate (9) is provided with a caliper reader (13), and the caliper reader (13) is propped against the outer side of the right vertical plate (9) and is movably connected with the scale (12) along the transverse direction of the scale (12).

6. The fixture for testing a testing machine according to claim 5, wherein: the caliper reader (13) is an electronic automatic reader.

7. A fixture for testing a testing machine as claimed in claim 1, 2 or 3, wherein: the left sample placing rack (2) and the right sample placing rack (3) are L-shaped and comprise square feet (2A) and square legs (2B); the left sample placing frame (2) and the right sample placing frame (3) are arranged in a mirror image mode, and the left sample placing frame (2) and the leg (2B) of the right sample placing frame (3) are arranged adjacently.