CN211668906U - Device for preparing transmission sample film - Google Patents

Abstract

The utility model relates to a device for transmission sample film preparation, including the grinding seat of seting up the through-hole, and wear to establish lead screw and sample platform on the through-hole, the lead screw passes through threaded connection with grinding the seat, rotates on grinding the seat to be connected with the calibrated scale coaxial with the lead screw, be equipped with on the calibrated scale with the corresponding scale of screw thread helical pitch on the lead screw. The utility model can know the grinding thickness of the sample in time through the dial, and can grind the sample to be within 10 microns at least according to different thinning speeds which can be selected by different materials; the stainless steel screw rod is matched with the copper bush, so that the smoothness of operation is improved; the sample is spirally pushed by the screw rod to control the length of the sample, so that the practicability is high, and the samples of various materials can be processed; the processing environment in the device is mild, the tissue and damage to sample materials are small, and the quality of the obtained sample is high; the device has high reliability, is not easy to damage in the using process and has good maintenance and repair performance.

Description

Device for preparing transmission sample film

Technical Field

The utility model relates to a transmission sample attenuate technical field especially involves a device for transmission sample film preparation.

Background

With the development of technology, transmission electron microscopes are increasingly used, and the thickness of a sample is generally within 100 nm. The conventional method is to cut the block sample into uniform slices of 100-200 microns, polish and grind the slices to within 50 microns, and then thin and perforate the slices for observation. However, in the process of grinding and thinning, in the traditional balanced manual grinding method, measurement is often required to be repeatedly performed in the grinding process, the time and complexity of sample preparation are increased, meanwhile, the prepared sample often has the problem of uneven thickness, a large sample needs to be prepared, and then a uniform place is selected for sampling, so that the success rate of preparing small samples is very low.

Disclosure of Invention

The utility model discloses to prior art's not enough, provide a device for transmission sample film preparation, can grind thickness at the accurate control of grinding in-process, can guarantee thickness uniformity's device again simultaneously, satisfy the grinding requirement in the transmission sample preparation process, the device can grind the arbitrary sample use of removing the powder form.

The utility model discloses a following technical scheme realizes, provides a device for transmission sample film preparation, including the grinding seat of seting up the through-hole, and wear to establish lead screw and sample platform on the through-hole, the lead screw passes through threaded connection with the grinding seat, rotates on the grinding seat to be connected with the calibrated scale coaxial with the lead screw, be equipped with on the calibrated scale with the corresponding scale of screw thread helical pitch on the lead screw.

This scheme is when using, put into the through-hole of grinding the seat from one end in the sample platform that will have the sample, the lead screw penetrates the through-hole from the other end, abrasive paper installs the one end at the lead screw towards the sample, make the lead screw rotate and move towards the sample platform simultaneously through rotatory lead screw, the realization is to the grinding of sample, because the scale is corresponding with the screw thread helical pitch of lead screw, the produced axial displacement of every certain angle of rotation of lead screw can be read out from the scale on the calibrated scale, consequently, the axial displacement of lead screw can be controlled, thereby the thickness of control sample, need not to measure repeatedly at the grinding in-process.

As optimization, the lead screw includes translation section, screw thread section and the application of force section that sets gradually, the external diameter of translation section with the internal diameter adaptation of through-hole is equipped with on the grinding seat with the connecting portion that threaded connection is passed through to the screw thread section. The screw rod of the optimized scheme is divided into three sections, the translation section is in sliding connection with the through hole of the grinding seat, the thread section is connected with the grinding seat, and the force application section is used for rotating the screw rod, so that the structure is simple, and the operation is convenient.

As optimization, connecting portion include that the hole is equipped with the screwed bush to and set firmly the adapter sleeve on grinding the seat, the hole at the adapter sleeve is fixed to the bush, and the hole of bush with the through-hole is coaxial. This optimization scheme makes things convenient for internal screw thread processing through setting up the bush, has avoided lead screw and grinding seat direct emergence friction simultaneously, and the bush can adopt the copper bush, reduces the wearing and tearing of lead screw.

Preferably, the bushing and the connecting sleeve are relatively fixed through interference fit. This optimization scheme passes through interference fit with the adapter sleeve with the bush fixed mutually, has avoided both to take place relative movement, uses liquid nitrogen cold assembly during the installation, has guaranteed the installation accuracy of lead screw.

Preferably, a sealing groove is formed in the outer circle of the translation section, and a sealing ring in sealing contact with the hole wall of the through hole is arranged in the sealing groove. This optimization scheme is through setting up the seal groove, can avoid the grinding waste material to get into the screw thread part of lead screw and harm the lead screw precision, has prolonged the life of this device.

For optimization, the scale on the dial covers 360 degrees, the measuring range is 200 mu m, and each scale is separated by 5 mu m. The scale coverage of this optimization scheme is wide, and the precision is high, and the registration on the scale mark is sample thickness, more makes things convenient for accurate control sample thickness.

And optimally, an end cover is fixedly arranged at one end of the screw rod, which is far away from the grinding seat, and an indicating plate positioned on one side of the dial scale with scales is fixedly connected onto the end cover. This optimization scheme is through setting up the end cover, conveniently rotates the operation to the lead screw, through setting up the indicator board, carries out the reading more easily, has improved the accuracy of reading.

Preferably, a through hole penetrating along the axial direction is formed in the screw rod. According to the optimized scheme, the sample table is conveniently ejected out of the through hole by arranging the through hole.

The utility model has the advantages that:

1. the grinding thickness of the sample can be known in time through the dial, and the sample can be ground to be within 10 microns at minimum aiming at different thinning speeds which can be selected by different materials;

2. the stainless steel screw rod is matched with the copper bush, so that the smoothness of operation is improved;

3. the sample is spirally pushed by the screw rod to control the length of the sample, so that the practicability is high, and the samples of various materials can be processed;

4. the processing environment in the device is mild, the tissue and damage to sample materials are small, and the quality of the obtained sample is high;

5. the device has high reliability, is not easy to damage in the using process and has good maintenance and repair performance.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the dial structure;

FIG. 3 is a schematic view of a polishing pad;

FIG. 4 is a schematic view of a screw rod structure;

FIG. 5 is a schematic view of an end cap configuration;

shown in the figure:

1. the device comprises an end cover, 2, a gasket, 3, a screw rod, 3.1, a translation section, 3.2, a screw thread section, 3.3, a force application section, 3.4, a sealing groove, 3.5, a through hole, 4, an indicating plate, 5, a dial, 6, a bushing, 7, a grinding seat, 7.1, a through hole, 7.2, a connecting sleeve, 8 and a sample table.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in figure 1, the device for preparing the transmission sample film comprises a grinding seat, an end cover, a dial, a cylindrical sample table 8 and a lead screw 3 made of stainless steel, wherein the grinding seat is made of wear-resistant steel, and the ratio of the diameter of the outer ring of the grinding seat to the diameter of the sample table 8 is more than 5.

Grind and seted up through-hole 7.1 in the seat 7, lead screw 3 is equipped with along the perforation 3.5 that the axial runs through including the translation section 3.1, screw thread section 3.2 and the application of force section 3.3 that set gradually in the lead screw, and the translation section 3.1 of lead screw 3 penetrates the through-hole from the upper end, the external diameter of translation section with the internal diameter adaptation of through-hole, sample platform 8 penetrate the through-hole from the lower extreme, be transition fit or less interference fit between sample platform and the through-hole, both guaranteed that the sample platform can move in the through-hole under the top of lead screw is moved, can prevent sample platform again because the dead weight and from landing in the through-hole by oneself.

The threaded section on the screw rod 3 is connected with the grinding seat 7 through threads, and the grinding seat is provided with a connecting part which is connected with the threaded section through threads. Specifically, connecting portion include that the hole is equipped with the screwed bush 6 to and set firmly adapter sleeve 7.2 on grinding the seat, bush 6 is the copper sheathing, and the bush is fixed in the hole of adapter sleeve, and the hole of bush with the through-hole is coaxial. The bushing and the connecting sleeve 7.2 are relatively fixed by adopting large interference fit, and the installation precision of the lead screw is ensured by using liquid nitrogen cooling assembly, and meanwhile, the reliability of relative fixation between the bushing and the connecting sleeve is ensured. Through the linear motion pair that lead screw and bush constitute, promote sample platform 8 and the sample in the grinding seat through-hole and realize feeding, the accurate control of sample thickness is realized to the grinding of cooperation abrasive paper.

In order to protect the thread pair from being damaged by abrasive dust in the using process, a sealing groove 3.4 is arranged on the excircle of the translation section 3.1, and an O-shaped sealing ring in sealing contact with the hole wall of the through hole is arranged in the sealing groove. When the screw rod moves in the through hole of the grinding seat, grinding debris is blocked from entering the threaded section through the O-shaped sealing ring.

The grinding seat is rotatably connected with a dial 5 coaxial with the screw rod, an inner hole of the dial 5 is sleeved on the connecting sleeve, the dial 5 is provided with scales corresponding to the thread lead on the screw rod, and the outer circular surface of the dial is provided with anti-skidding teeth so as to facilitate rotation.

The thread lead is 200 μm, the scale coverage on the scale is 360 degrees, the range is 200 μm, and each scale is spaced 5 μm apart.

An end cover 1 is fixedly arranged at one end of the screw rod, which is far away from the grinding seat, an indicating plate 4 which is positioned at one side of the dial scale and is provided with scales is fixedly connected onto the end cover, a through hole which is coaxial with the through hole 3.5 is arranged on the end cover, and a gasket 2 is fixedly connected onto the bottom surface of the end cover to separate the end cover from the indicating plate. The indicating plate 4 is a plastic gram force plate and is used for indicating scale marks, and the dial is a plastic digital plate. The end cover can be rotated to drive the screw rod to rotate so as to achieve the purpose of controlling the screw rod to move up and down and further control the extension length of the sample.

The specific use method of the embodiment is as follows:

1. firstly, zeroing the scales of the grinding table, putting the sample table into a through hole of the grinding seat, rotating the end cover to enable the screw rod 3 to retreat until the lower surface of the sample table is flush with the lower surface of the grinding seat, keeping the sample table in contact with the screw rod all the time in the process, then rotating the dial to enable the 0 scale line of the dial to coincide with the scale line on the end cover or the tip of the indicating plate, completing the zeroing of the scales, and then taking out the sample table.

2. Sampling the interested sample area by methods such as wire cutting, wherein the sampling thickness is 200-300 mu m, the diameter or the maximum diagonal length is less than the diameter of the sample platform, and the upper plane and the lower plane of the sampled sample are as flat as possible;

3. adhering a sample on a sample table by using paraffin or hot melt adhesive;

4. placing a sample table with a sample into a through hole of a grinding seat, rotating a knob anticlockwise to enable the sample to just sink into the grinding seat, wherein the indication number on a scale line is the thickness of the sample;

5. continuously rotating an end cover clockwise to eject a sample table, sequentially using 600#, 800#, 1000#, 1200#, 1500#, 2000#, 3000# abrasive paper to thin the sample until the thickness of the residual sample is 100 mu m, taking the sample table out of a grinding seat, turning the sample and putting the sample back into the grinding table, continuously thinning the sample according to the 600#, 800#, 1000#, 1200#, 1500#, 2000#, 3000# abrasive paper, and displaying according to the index of a dial to be within 30 mu m;

6. and taking out the sample table, and soaking in acetone to obtain the ground sample meeting the requirements.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims (8)

1. An apparatus for transmission sample film preparation, characterized by: including grinding seat (7) of seting up through-hole (7.1), and wear to establish lead screw (3) and sample platform (8) on the through-hole, lead screw (3) with grind seat (7) and pass through threaded connection, grind the seat and go up to rotate and be connected with the coaxial calibrated scale (5) of lead screw, be equipped with on calibrated scale (5) with the corresponding scale of screw thread helical pitch on the lead screw.

2. An apparatus for transmission sample film preparation according to claim 1, wherein: the lead screw (3) is including translation section (3.1), screw thread section (3.2) and application of force section (3.3) that set gradually, the external diameter of translation section with the internal diameter adaptation of through-hole is equipped with on the grinding seat with the screw thread section passes through threaded connection's connecting portion.

3. An apparatus for transmission sample film preparation according to claim 2, wherein: connecting portion include that the hole is equipped with screwed bush (6) to and set firmly adapter sleeve (7.2) on grinding the seat, the hole at the adapter sleeve is fixed to the bush, and the hole of bush with the through-hole is coaxial.

4. An apparatus for transmission sample film preparation according to claim 3, wherein: the bushing (6) and the connecting sleeve (7.2) are relatively fixed through interference fit.

5. An apparatus for transmission sample film preparation according to claim 2, wherein: and a sealing groove (3.4) is arranged on the excircle of the translation section (3.1), and a sealing ring in sealing contact with the hole wall of the through hole is arranged in the sealing groove.

6. An apparatus for transmission sample film preparation according to claim 1, wherein: the thread lead is 200 μm, the scale coverage on the scale is 360 degrees, the range is 200 μm, and each scale is spaced 5 μm apart.

7. An apparatus for transmission sample film preparation according to claim 1, wherein: an end cover (1) is fixedly arranged at one end, far away from the grinding seat, of the screw rod, and an indicating plate (4) located on one side, with scales, of the dial is fixedly connected onto the end cover.

8. An apparatus for transmission sample film preparation according to claim 1, wherein: the screw rod is internally provided with a through hole (3.5) which penetrates through along the axial direction.

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