CN204535630U - A kind of sample parallel degree proving installation - Google Patents

Abstract

A sample parallelism testing device belongs to the technical field of measurement. It includes a circular base, a column with a chute, and an upper disc. The circular base and the column are connected together. The base is engraved with concentric square and circular scoring lines. The column is provided with a chute, and the upper disc is connected by bolts and The sliding rod is connected, the sliding rod is embedded in the chute, which can make the upper disc move up and down in the column, and a cross seam is made on the center line of the upper disc, and the scale can be inserted into the cross seam to measure the surface of the sample relative height value. The utility model has the advantages of simple structure, flexible and convenient use, and can realize accurate measurement of the parallelism of samples to be tested.

Description

A sample parallelism testing device

technical field

Compressive strength is one of the most basic indicators in the mechanical strength of rock and concrete materials. The invention relates to the field of testing the mechanical properties of materials, in particular to a testing device for the parallelism of samples such as rocks and concrete.

Background technique

Compressive strength is one of the most basic indicators of the mechanical strength of rock and concrete materials. It is of great significance for evaluating the characteristics of rock materials, the strength level of concrete, and whether it is applicable to engineering.

In laboratory compressive strength tests, cylindrical specimens with a diameter of 50mm and a height of 100mm are commonly used for rock materials, and 100mm cubic specimens are commonly used for concrete materials. Concrete materials can also be prepared by pouring molds of a certain size, but whether it is rock or concrete materials, in the process of processing and preparation, the parallelism of the test piece is usually measured with a caliper, or even with the naked eye. Evaluation, the error is relatively large, due to processing accuracy, irregular mold preparation and artificial factors, many processed samples are placed on the loading table of the testing machine, and the parallelism of the two ends of the test piece is only found when the test piece and the pressure plate of the testing machine are in contact. The strength is poor, and the upper and lower pressure-bearing end faces of the material are not parallel, which will cause the specimen to be eccentrically compressed during the test. Not only can the true strength of the material not be obtained, but also a lot of manpower, material resources and financial resources are wasted. Therefore, it is very important to measure the parallelism of the specimen before testing.

However, there is currently a lack of devices for detecting the parallelism of mechanical performance test samples. The existing detection devices for the parallelism of automobile chassis and rotary workpieces are not suitable for the detection of the parallelism of samples such as rocks. Therefore, a simple structure, The easy-to-operate and high-precision sample parallelism detection device has high practical application value.

Contents of the invention

The object of the present invention is to provide a sample parallelism testing device, which has simple measuring method, convenient operation and high reliability.

In order to achieve the above object, the technical solution of the present invention is:

1. A sample parallelism test device, comprising a test mechanism formed by a circular base, a column and an upper disc, and the circular base is engraved with square and circular scoring lines. The base is welded with uprights at both ends, and the base and the uprights are fixedly connected together, and the test sample is placed on the base; the uprights have chutes, embedded with sliding rods, and the gap between the sliding rods and the chute is small; the upper disc and the base The diameters are the same, and the upper disc and the slide bar are connected by bolts, so that the upper disc and the slide bar can move up and down in the column chute.

2. Further, the upper disc has threaded holes at both ends. After adjusting the position of the upper disc, the upper disc can be fixed on the column with bolts. The slide bar also plays a role in maintaining the upper disc and the circular base. Neutral and parallel effects.

3. Further, the upper disk is provided with cross seams along the center line.

The further beneficial effects of the present invention are: after the upper disc and the surface of the test piece are in contact, the scale, which can be a depth gauge of a vernier caliper, is inserted into the cross seam of the upper disc, thereby obtaining the relative height value of each point on the surface, for further Accurately judge the parallelism of samples and provide experimental data.

Description of drawings

Fig. 1 is the front structural representation of sample parallelism testing device of the present invention;

Fig. 2 is the side structure schematic diagram of sample parallelism testing device of the present invention;

The meanings of the symbols in the figure are as follows:

Base-1, column-2, upper disk-3, chute-4, slide bar-5, bolt-6.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described by embodiment;

1, as shown in Figure 1, the present invention provides a kind of sample parallelism testing device, comprises the testing mechanism that circular base (1) and column (2) and upper disk (3) form, and described circular base ( 1) It is engraved with square and circular engraved lines, and the base (1) is welded with columns (2) along both ends, and the base (1) and the column (2) are fixedly connected together; the column (2) has a chute (4), built-in slide bar (5); the upper disc (3) and the base (1) have the same diameter, and the upper disc (3) and the slide bar (5) are connected by bolts, which can realize the upper disc ( 3) and slide bar (5) move up and down in the column (2) chute.

2. The upper disc (3) has threaded holes at both ends, and the upper disc (3) and the sliding rod (4) are fixed on the column (2) by bolts (6) and kept in a circular shape. Alignment and parallelism of the base (1).

3. The upper disk (3) is provided with a cross seam along the center line, and a scale can be inserted into the seam, and the scale can be a depth gauge of a vernier caliper.

When using the sample parallelism testing device to test the parallelism of the sample:

In the first step, the upper disc (3) and the slide bar (5) are connected by bolts, so that the upper disc and the slide bar can move up and down in the chute of the column (2). First raise the upper disc (3) so that the test sample can be placed, then place the sample on the base (1), and make the lower surface and the cubic or circular shape on the base (1) according to the shape of the sample. Lines coincide.

The second step is to move the upper disc (3) until the upper surface of the upper disc (3) is in full contact with the sample to be tested. If the parallelism of the end surface of the sample is good, the upper surface of the sample and the upper disc (3) will be in contact with each other. Tightly combined, if the parallelism is poor, there will be a gap between the upper surface of the sample and the upper disc (3), at this time tighten the bolts (6) to fix the upper disc (3) on the column (2) .

The third step is to contact the scale with the upper surface of the sample to be measured through the cross slit of the upper disc (3). When measuring to the opposite end, several points can be selectively measured, such as the end point of the sample, the 1/4 point of the sample length (diameter), the center point, etc., by measuring the end face of the sample to the upper surface of the upper disc The relative height value of the surface of the sample to be measured can be obtained (that is, the upper surface of the upper disc is uniformly used as the reference level). Using the same method, measure the relative height of the sample surface under the other engraved line of the cross seam of the upper disk. After the above measurement is completed, the experimental data can be provided for determining the error value of the flatness of the upper and lower surfaces of the sample.

The above-mentioned embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.

Claims (3)

1. a sample parallel degree proving installation, comprise the mechanism for testing that cup dolly (1), column (2) and upper disk (3) are formed, it is characterized in that: cup dolly (1) is carved with square and circular groove, base (1) is welded with column (2) along two ends, both base (1) and column (2) are fixed together; Column (2) with chute (4), embedded slide bar (5); Upper disk (3) is identical with base (1) diameter, described upper disk (3) is connected by bolt with slide bar (5), can realize disk (3) and slide bar (5) moving up and down in column (2) chute.

2. sample parallel degree proving installation as claimed in claim 1, it is characterized in that: described upper disk (3) has threaded hole at two ends, be fixed on column (2) by bolt (6) by upper disk (3) and slide bar (5), slide bar (5) also plays and keeps upper disk (3) and cup dolly (1) centering and parallel effect.

3. the sample parallel degree proving installation as described in claim 1 and 2, is characterized in that, described upper disk (3) centrally cross crotch is opened by line, and this cross crotch can insert rule, thus measures the relative height value of sample surfaces.