CN220207234U - Cold mosaic die for sheet metallographic sample - Google Patents

Abstract

The utility model relates to a cold mosaic mold for a sheet metal metallographic sample, which comprises a base, a fixed wall fixedly connected to the upper end surface of the base and a movable wall hinged with the fixed wall through a vertical rotating shaft, wherein the lower end surface of the movable wall is attached to the upper end surface of the base, the fixed wall and the movable wall are closed to form an annular cavity with an upper opening, the upper end of the fixed wall is fixedly connected with a sealing head, a positioning hole is formed in the sealing head, a positioning needle vertically inserted into the positioning hole is further included, and one end, close to the rotating shaft, of the fixed wall and one end, close to the rotating shaft, of the movable wall are fixedly connected with a handle.

Description

Cold mosaic die for sheet metallographic sample

Technical Field

The utility model relates to the field of metallographic sample preparation auxiliary tools, in particular to a cold mosaic mold for a sheet metallographic sample.

Background

Sample embedding is one of important steps in metallurgical metallographic detection analysis, and especially for samples with smaller size, fragility, irregularity and the like or samples with special detection requirements on edge positions, embedding is generally carried out before grinding and polishing. Compared with the hot inlay method, the cold inlay method does not need special equipment, has the characteristic of flexibility, and is used for materials sensitive to temperature and pressure, so that the cold inlay method plays an irreplaceable role in the metallurgical detection and analysis field of the metallurgical industry.

The sheet sample must be inlaid before metallographic detection, and whether a hot inlaying method or a cold inlaying method is used, namely the sample is easy to fall down when inlaid due to small section size to influence the detection result, and particularly the hot inlaying method is easier to cause sample tilting in the pressurizing process.

To avoid the risk of dumping the sheet sample during the inlaying process, the sheet sample is preferably inlaid by a cold inlaying method. The demoulding operation difficulty is high after the cold embedding method is finished, for example, the operation of carrying out the mould firstly causes material waste, and secondly, the sample preparation difficulty can be increased due to the fact that the sample size is increased. In order to avoid the falling risk of the thin plate when the thin plate is embedded by a cold embedding method, the samples are generally vertically upwards through glue and adhesive tapes, the operation is complex, and the falling phenomenon still occurs when a plurality of groups of samples are embedded at the same time. The query patent CN201920329285.1 discloses a metallographic mosaic mold for fixing a sample, wherein the mold can ensure the mosaic quality of the sample, but is a disposable mold and cannot be reused.

Therefore, it is highly desirable to create a cold mosaic mold that can prevent the falling of the sheet sample and can be reused.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the cold mosaic mold which has simple structure and convenient operation, can prevent the thin plate sample from toppling over and can be reused.

The utility model provides a cold mosaic mold for a sheet metal metallographic sample, which comprises a base, a fixed wall fixedly connected to the upper end surface of the base, and a movable wall hinged with the fixed wall through a vertical rotating shaft, wherein the lower end surface of the movable wall is attached to the upper end surface of the base, the fixed wall and the movable wall are closed to form an annular cavity with an upper opening, the upper end of the fixed wall is fixedly connected with a seal head, a positioning hole is formed in the seal head, and the cold mosaic mold further comprises a positioning needle vertically inserted into the positioning hole.

The method comprises the steps of vertically placing a sample on a base, inserting a proper positioning needle into a positioning hole, enabling the sample to vertically stand by the positioning needle, closing a fixed wall and a movable wall, then injecting prepared cold mosaic material, drawing the positioning needle out after the sample is stationary, separating the fixed wall from the movable wall after the cold mosaic material is stationary until the cold mosaic material is solidified, and taking out the mosaic sample.

As optimization, the positioning holes are provided with a plurality of positioning holes, and the inner diameters of the positioning holes are sequentially increased. The locating hole in this scheme is provided with a plurality of and internal diameter increases in proper order to can select suitable locating hole diameter according to the sample, corresponding pilot pin diameter also differs.

As optimization, the fixed wall and the movable wall are arc-shaped plates with the same radius, and the arc length of the fixed wall is 0.2-0.5 times of the arc length of the movable wall. In the scheme, the arc length of the fixed wall is 0.2-0.5 times of that of the movable wall, so that the arc length of the movable wall is larger, and a inlaid sample can be taken out conveniently.

As optimization, handles are fixedly connected at one end of the fixed wall, which is close to the rotating shaft, and at one end of the movable wall, which is close to the rotating shaft, and the two handles are distributed in a V shape. When in use, the two handles are pinched, so that the fixed wall and the movable wall are separated.

Preferably, a rebound device is arranged between the two handles. After releasing the two handles, the resilient means closes the fixed and movable walls.

As optimization, the rebound device is an elastic sheet, and two ends of the elastic sheet are respectively connected with two handles. The elastic piece in this scheme realizes the elastic separation of two handles through self elasticity.

As an optimization, the butt joint of the fixed wall and the movable wall is realized through a step joint. In the scheme, the butt joint is realized through the step-shaped joint at the butt joint position, so that the butt joint is tight.

The beneficial effects of the utility model are as follows: the cold mosaic mold for the sheet metallographic sample can prevent the sheet sample from toppling, has a simple structure and is convenient to operate, the sheet metallographic sample can be reused, the material consumption is reduced, and the sample is convenient to take out from the mold.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of the interface between the fixed wall and the movable wall of the present utility model;

the figure shows:

1. a base; 2. a cavity; 3. a handle; 2-1, a fixed wall; 2-2, a movable wall; 2-3, a rotating shaft; 2-4, end socket; 2-5, positioning holes; 2-6, positioning needles; 3-1, a rebound device.

Detailed Description

In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.

As shown in fig. 1-2, the cold mosaic mold for the sheet metallographic sample comprises a base 1, a fixed wall 2-1 fixedly connected to the upper end surface of the base 1 and a movable wall 2-2 hinged with the fixed wall 2-1 through a vertical rotating shaft 2-3, wherein the base 1 is made of cylindrical stainless steel, and the surface of the base is a smooth surface, the thickness of the base is 5mm, and the diameter of the base is 30mm.

The fixed wall 2-1 and the movable wall 2-2 are closed to form an annular cavity 2 with an upper opening, the cavity 2 is formed by splicing the fixed wall 2-1 and the movable wall 2-2 into a cylinder, the material is stainless steel, the inner wall is a smooth surface, the inner diameter size is 30mm, the wall thickness is 2mm, and the height is 45mm.

The lower edge of the fixed wall 2-1 is flush with the upper end face of the base 1, the lower end face of the movable wall 2-2 is attached to the upper end face of the base 1 through resistance welding, the fixed wall 2-1 and the movable wall 2-2 are arc-shaped plates and have the same radius, and the arc length of the fixed wall 2-1 is 0.2-0.5 times of the arc length of the movable wall 2-2. The fixed wall 2-1 in this embodiment occupies 2/5 of the entire cavity.

The butt joint of the fixed wall 2-1 and the movable wall 2-2 is realized through a step joint. A top view of the step joint is shown in fig. 2.

The upper end of the fixed wall 2-1 is fixedly connected with the sealing head 2-4, the sealing head 2-4 is a transverse stainless steel plate, and the sealing head is blocked at the opening position of the upper end of the fixed wall 2-1, namely the edge of the sealing head 2-4 is composed of an arc edge and a straight edge, and the arc edge is in butt joint with the upper end of the fixed wall 2-1.

The sealing head 2-4 is provided with a positioning hole 2-5 and also comprises a positioning needle 2-6 vertically inserted into the positioning hole 2-5. The positioning holes 2-5 are provided with a plurality of positioning holes, and the inner diameters of the positioning holes are sequentially increased. Thereby adapting to the positioning needles 2-6 with different diameters, wherein the positioning needles 2-6 are made of stainless steel.

The fixed wall 2-1 and the movable wall 2-2 are fixedly connected with handles 3 at one end close to the rotating shaft and one end close to the rotating shaft, the two handles 3 are arranged in a V shape and are arranged in a crossing way, so that when the two handles are clamped inwards by hands, the fixed wall 2-1 and the movable wall 2-2 are separated and opened,

a rebound device 3-1 is arranged between the two handles 3. The rebound device 3-1 is an elastic sheet, the elastic sheet is of a U-shaped structure made of high-elasticity cold-rolled sheet, and two ends of the elastic sheet are respectively connected with two handles 3.

The application method of the utility model comprises the following steps:

during the use, pinch two handles 3, make fixed wall 2-1 and movable wall 2-2 separate, place the sample on base 1 vertically, the sample is perpendicular with the straight flange of head, according to sample thickness, select suitable locating hole 2-5, insert suitable pilot pin 2-6, because the sample top surface is coarse irregular structure, pilot pin 2-6 makes the sample stand vertically, loosen two handles 3, make fixed wall 2-1 and movable wall 2-2 closed, then pour into the cold mosaic material that prepares, draw out pilot pin 2-6 after resting for 20min, should operate steadily during the extraction, after stationary until cold mosaic material solidifies, operate two handles 3, make fixed wall 2-1 and movable wall 2-2 separate, take out the sample that inlays, loosen handle 3 again, make this mould resume initial state.

Of course, the above description is not limited to the above examples, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.

Claims (7)

1. A cold mosaic die for a sheet metallographic sample is characterized in that: the device comprises a base (1), a fixed wall (2-1) fixedly connected to the upper end face of the base (1) and a movable wall (2-2) hinged to the fixed wall (2-1) through a vertical rotating shaft (2-3), wherein the lower end face of the movable wall (2-2) is attached to the upper end face of the base (1), the fixed wall (2-1) and the movable wall (2-2) are closed to form an annular cavity (2) with an upper opening, an end socket (2-4) is fixedly connected to the upper end of the fixed wall (2-1), a positioning hole (2-5) is formed in the end socket (2-4), and a positioning needle (2-6) vertically inserted into the positioning hole (2-5) is further included.

2. A cold mosaic mold for sheet metallographic samples according to claim 1, wherein: the positioning holes (2-5) are provided with a plurality of inner diameters which are sequentially increased.

3. A cold mosaic mold for sheet metallographic samples according to claim 1, wherein: the fixed wall (2-1) and the movable wall (2-2) are arc-shaped plates with the same radius, and the arc length of the fixed wall (2-1) is 0.2-0.5 times of the arc length of the movable wall (2-2).

4. A cold mosaic mold for sheet metallographic samples according to claim 1, wherein: the fixed wall (2-1) is close to one end of the rotating shaft, and the movable wall (2-2) is close to one end of the rotating shaft, and handles (3) are fixedly connected to one end of the fixed wall, the movable wall and the movable wall, and the handles (3) are arranged in a V shape.

5. The cold mosaic mold for sheet metallographic samples according to claim 4, wherein: a rebound device (3-1) is arranged between the two handles (3).

6. The cold mosaic mold for sheet metallographic samples according to claim 5, wherein: the rebound device (3-1) is an elastic sheet, and two ends of the elastic sheet are respectively connected with two handles (3).

7. A cold mosaic mold for sheet metallographic samples according to any one of claims 1-6, wherein: the butt joint of the fixed wall (2-1) and the movable wall (2-2) is realized through a step joint.