CN204495633U - Small sample sample preparation auxiliary clamp - Google Patents

Abstract

The utility model relates to an auxiliary fixture for sample preparation of small samples, which comprises left and right forceps engaging with each other. The middle part of the occlusal surface of the left forceps has a protrusion, and the occlusal surface of the left forceps is straight on both sides of the protrusion. , the middle part of the occlusal surface of the right pliers has a groove that matches the protrusion, the occlusal surface of the right pliers is also straight on both sides of the groove, and the left and right pliers are between the protrusion and the groove. Both sides are respectively fixed by screws. The utility model focuses on solving the problems of hand-held grinding and uneven grinding surfaces of samples, and is suitable for cylindrical, cuboid and irregular-shaped slender rod-shaped samples. It has the advantages of low cost, convenient production, simple operation, and wide applicability. Good sample preparation effect, not easy to damage.

Description

Auxiliary fixture for small sample preparation

technical field

The utility model relates to an auxiliary fixture for sample preparation of small samples.

Background technique

In recent years, the development and application of materials has become more and more rapid and extensive, especially the state has increased its support for the new material industry, so that material research has become more frequent, and material samples of various shapes have been put on the test bench. With the deepening of the research, we also need to study the surface structure of the material. Before the research, we need to polish the surface of the material. However, for some cylinders and irregularly shaped slender rods or block samples that are difficult to hold directly by hand, it is difficult to fix and perform grinding operations. Therefore, these difficulties have prompted researchers to demand clamping tools. Researchers urgently need a fixture that can be used multiple times and is easy to operate to fix small material samples without damaging the sample, and then allow the sample to be polished on different thicknesses of sandpaper or a sample grinder. This experimental model is designed to solve such a sample preparation problem that has caused headaches for many experimenters.

The current main metallographic sample preparation method is to directly place the sample on sandpaper or a grinder for grinding by holding the sample, but the premise of doing this is that the sample is of a larger size, and using this method cannot ensure the integrity of the polished surface. Flatness, so when the size of the grinding object is small and irregular and difficult to handle by hand, it is necessary to use a jig to assist the operation.

At present, Chinese Patent No. 201120422807.6 discloses a fixture suitable for metallographic sample preparation on the surface of thin steel plates. The fixture is composed of a base, lifting bolts, positioning bolts and a magnetic base. It is used for metallographic sample preparation of thin sheet steel samples, but it is not suitable for some cylindrical, cuboid and irregular-shaped slender rod samples.

Utility model content

The technical problem to be solved by the utility model is to provide an auxiliary fixture for sample preparation of small samples with simple structure, convenient use and good applicability.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: an auxiliary fixture for sample preparation of small samples, including left and right forceps that interlock with each other, the middle of the occlusal surface of the left forceps has a protrusion, and the left forceps The occlusal surface is straight on both sides of the protrusion, and the middle part of the occlusal surface of the right pliers has a groove that matches the protrusion, and the occlusal surface of the right pliers is also straight on both sides of the groove. The right clamp body is respectively fixed by screws at both sides of the protrusion and the groove.

Further, the left and right pliers are in the shape of a cuboid after being engaged.

Further, the tips of the protrusions and the grooves both have ground end surfaces.

Further, the left and right clamp bodies are made of aluminum alloy.

Compared with the prior art, the utility model has the following beneficial effects: the utility model focuses on solving the problems of hand-held grinding and sample grinding surface unevenness, and is suitable for cylindrical, cuboid and irregular-shaped slender rod-shaped samples, and has the advantages of low cost , easy to make, easy to operate, wide applicability, and the material sample sample preparation effect is good, not easy to damage; the utility model can be used for grinding on sandpaper, and can also be directly hand-held on the polishing machine after clamping the sample for grinding. After polishing the sample The sample can also be directly placed on the observation instrument for observation without removing the sample, which has good flexibility; the utility model has a simple structure and does not need to rely on the action of electricity or magnetism, and the conditions of use and the environment are not limited.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the first usage state of the embodiment of the utility model.

Fig. 3 is a schematic diagram of the second usage state of the embodiment of the present invention.

In the figure: 1-left clamp body, 11-protrusion, 2-right clamp body, 21-groove, 3-screw, 4-sample.

Detailed ways

As shown in Figures 1 to 3, a small sample sample preparation auxiliary fixture includes a left forceps body 1 and a right forceps body 2 interlocking each other, the middle part of the occlusal surface of the left forceps body 1 has a protrusion 11, and the left forceps body 1. The occlusal surface is straight on both sides of the protrusion 11. The middle part of the occlusal surface of the right pliers body 2 has a groove 21 that matches the protrusion 11. The occlusal surface of the right pliers body 2 is also on both sides of the groove 21. Straight, the left pliers body 1 and the right pliers body 2 are respectively fixed by screws 3 at both sides of the protrusion 11 and the groove 21.

In the utility model, the left pliers body 1 and the right pliers body 2 are in the shape of a cuboid after being engaged, and are easy to rotate 90 degrees to eliminate scratches when grinding.

In the present invention, the tips of the protrusions 11 and the grooves 21 both have ground end surfaces, and the preset value of the ground surface is 1-2 mm.

In the utility model, the left pliers body 1 and the right pliers body 2 are made of aluminum alloy material, which are light in weight, and the process of polishing the sample 4 is easier and easier to operate.

The utility model can be applied to the metallographic sample preparation of cylinders and irregularly shaped elongated rods or massive samples 4, taking the common AZ31 magnesium alloy as an example:

(1) For sample 4 with two parallel surfaces, when preparing samples, according to the size of sample 4, the parallel surface of sample 4 can be placed at the straight place of the meshing surfaces of left clamp body 1 and right clamp body 2, or on the left The protrusions 11 and grooves 21 of the caliper body 1 and the right caliper body 2 are ground to the end faces, adjust the thickness reserved for grinding, and then tighten the left caliper body 1 and the right caliper body 2 with screws 3, and then mechanically polish Carry out mechanical grinding on the machine or on water-grinding sandpaper; after grinding in one direction, turn the left clamp body 1 and right clamp body 2 by 90° to continue grinding, which can eliminate the scratches caused by the previous direction to a certain extent. Repeat this step to minimize the impact of scratches; when the thickness of the protrusion 11 of the sample 4 is ground to the same level as the fixture, the grinding is completed;

(2) For cylindrical and regular-shaped slender rod-shaped or block-shaped samples 4, fix the sample 4 on the tip of the protrusion 11 and groove 21 of the left clamp body 1 and right clamp body 2, and grind the end faces, and the parts that need to be polished It is exposed outside the left clamp body 1 and right clamp body 2, and then screwed and fixed with screws 3. The three points at the end surface of sample 4 and the protrusion 11 and groove 21 of the left clamp body 1 and right clamp body 2 are ground flat. The contact ensures that the sample 4 does not move relative to the entire fixture;

(3) When the sample 4 is polished and the sample 4 is to be removed for follow-up operation and tissue observation, if the upper and lower surfaces of the sample 4 are flat, the sample 4 can be easily removed by unscrewing the fixing screw; if the sample 4 is not Regular shape, it is not easy to place the sample when it is removed and observed under a microscope or a scanning electron microscope, so it is not necessary to remove the sample 4, and the sample 4 can be placed on the stage of the observation instrument together with the fixture. The flatness of the fixture is conducive to Keep the surface of the sample to be observed horizontal.

In particular, when the utility model is polished on sandpaper, it has the following advantages: the center of gravity is basically at the center of the entire fixture structure, and will not deviate; the smoothness of the polished surface is ensured; Easy to grasp; the utility model is also suitable for directly holding the sample 4 on a mechanical polishing machine for polishing after being clamped. It is simple and versatile, which not only improves the quality of sample preparation but also improves the polishing efficiency.

The above descriptions are only preferred embodiments of the present utility model, and all equal changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (4)

1. An auxiliary fixture for small sample preparation, characterized in that: it includes left and right clamp bodies that engage with each other, the middle part of the occlusal surface of the left pliers body has a protrusion, and the occlusal surface of the left forceps body is on both sides of the protrusion Straight, the middle part of the occlusal surface of the right pliers has a groove that matches the protrusion, the occlusal surface of the right pliers is also straight on both sides of the groove, and the left and right pliers Both sides of the groove are respectively fixed by screws. 2. The auxiliary jig for small sample preparation according to claim 1, characterized in that: the left and right clamp bodies are in the shape of a cuboid after being engaged. 3. The auxiliary fixture for small sample preparation according to claim 2, characterized in that: the tips of the protrusions and the grooves both have ground-flat end surfaces. 4. The auxiliary fixture for small sample preparation according to claim 3, characterized in that: the left and right clamp bodies are made of aluminum alloy.