JPS6232247Y2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to a sample stage for a metallurgical microscope suitable for circular scanning microscopy of a circular metal sample.

(Prior art) A metallurgical microscope generally has a sample stage 1 as shown in Figure 1.
Place the metal sample 7 above the speculum hole of the deck plate 3.
The specimen is placed with the speculum surface facing down, and the objective lens 5 is approached from below to examine the condition of the speculum surface.
Many of the samples are circular, and their outer circumferential surfaces or, in the case of tubes, their inner circumferential surfaces are often scanned and inspected. For example, decarburization of the surface of metal round bars, round pipes, etc.
Measuring the thickness of the carburized layer of carburized or case hardened steel, or inspecting these materials for surface flaws, requires a full-circle scanning microscope.

(Problems to be solved) However, general metallurgical microscopes do not have the ability to rotate the sample in a circular manner. In other words, the sample stage is generally double-layered, with screws 4 and 4 respectively.
4' is attached, and by turning this, it can be slid in the left-right direction and front-back direction, respectively. Therefore, conventionally, the outer or inner circumference of a circular sample has been inspected by rotating the sample little by little by hand. This is a task that requires considerable skill, has poor work efficiency, and lowers the reliability of the inspection, but this tendency is particularly pronounced when the magnification increases.

(Means for solving the problem) The present invention was made in view of the above, and consists of three rollers that can be rotated horizontally around the specimen hole of the sample stage, and a circular sample that comes into contact with these rollers. , can be rotated by rotating any one of the rollers, and at least one of the rollers can be freely attached to and detached from the sample stage, and has a fixing means that can be fixed at any position on the sample stage. A sample stand for a metallurgical microscope, which is capable of circularly scanning and inspecting a circular sample.

(Embodiments and Effects) Next, the present invention will be explained in detail based on embodiment drawings.

Figure 2 is a plan view of the sample stage of the present invention;
The figure is a perspective view thereof. In the figure, 8, 8' are fixed rollers, 8'' is a freely movable adjusting roller, and 9, 9', 9''... are pins. That is, the sample stand according to the present invention is provided with three rollers 8, 8', and 8'' in addition to the conventional sample stand.
Therefore, the sample stand of the present invention can be created by using the conventional sample stand as is, by erecting the pins 9, 9' on the conventional sample stand by some means, fitting the rollers 8, 8', and adding some other means to the sample stand. It can be completed by placing a removable roller 8'' on the sample stage.Alternatively, the sample of the present invention can be prepared by drilling a microscopic hole in a separately prepared substrate and placing a roller in it. The table can also be used by stacking it on a conventional sample table and fixing it there.This example shows an example in which the conventional sample table is used as is.

To attach each roller to the sample stage, in this embodiment, for rollers 8 and 8', as shown in FIG. 4, plastic pins 9 are attached to a plastic base plate 10, and I inserted a roller and used it. As shown in FIG. 5, the roller 8'' used was one in which magnets were embedded in appropriate locations on the lower surface of a base plate 10'' to which a gripping portion 11 was attached. This makes it extremely easy to attach and detach by hand, and the roller position can be easily adjusted and moved to match the sample each time the sample is replaced. If the sample stage is made of non-magnetic metal or plastic that does not stick to magnets, use a thin iron plate attached to the surface.

The material of the roller used in the present invention needs to be relatively elastic. For example, rubber or silicone rubber that is soft and elastic enough to be used for bottle stoppers is most suitable. In this case, if a plastic or metal sleeve 12 is inserted into the pin hole as shown in FIG. 4, smooth rotation can be ensured.

Next, set the roller 8'' in a direction where the speculum operator can easily rotate the roller, i.e. left, right, front, back, etc., and then place roller 8 and roller 8' on the opposite side. , the rollers are placed in consideration of the positional relationship with the speculum hole 2 so that the middle of the two rollers is the speculum position.At this time, both rollers are placed relatively close to each other.The positions are set in this way. As a result, the outer and inner peripheries of the sample do not fall out of the inspection hole depending on the size of the sample, and the scanning line does not shake due to poor roundness of the sample, etc., making it possible to perform stable scanning inspection. In the case of a small-diameter sample, the deck plate 3 must be replaced with one with a smaller hole, so it may come off the specimen hole.
In this case, either or both of the rollers 8 and 8' may be replaced with a larger roller. Alternatively, the roller pins 9, 9' may not be fixed in position but may be movable like all the rollers 8''.

The above example shows an example in which the rollers are directly attached to the conventional sample stage, but as mentioned above, these rollers are placed on a separately prepared iron plate or plastic plate with microscopic holes drilled and three rollers arranged as described above. A recommended method is to create a sample stage according to the present invention and use it by attaching it to a conventional sample stage.

Next, the circular scanning microscopy work on the sample stage according to the present invention will be explained. First, move the roller 8'' to make it easier to place the sample in a predetermined position, then place the sample in contact with the rollers 8 and 8', and then lift the roller 8'' off the surface of the sample stage while gently pressing the sample. Lower it into the field and fix it magnetically. Next, the microscope is inspected while rotating the roller 8'' slowly with a finger. In this way, the sample rotates in the same position, and the required scanning line, for example, the entire outer circumference can be accurately scanned.

(Effects) By using the sample stage of the present invention, for example, it takes 3 to 4 minutes to inspect the presence or absence of carburization on the inner and outer surfaces of a stainless steel pipe with a diameter of approximately 25 mm, but this time can be reduced to 1 to 4 minutes.
In addition to being able to shorten the time to 1.5 minutes and more than doubling the work efficiency, we are now able to guarantee a complete all-around inspection.
We were able to perfect the reliability of the test.

As described above, according to the sample stage for a metallurgical microscope according to the present invention, it is possible to accurately and easily scan and inspect a circular trajectory such as the outer circumference or inner circumference of a circular sample.
Improving the efficiency of microscopy work on these samples and the accuracy of inspection,
This greatly contributes to improving reliability.

[Brief explanation of drawings]

Fig. 1 is a sketch of a metallurgical microscope, Fig. 2 is a plan view of a sample stage according to the present invention, Fig. 3 is a perspective view of Fig. 2, and Fig. 4 is an example of a fixing pin, a pin stand, and a roller. FIG. 5 shows an example of a pin stand that can be freely attached and detached. 8, 8': fixed roller, 8'': removable adjustment roller, 9: pin, 10: pin stand.

Claims (1)

[Scope of utility model registration request] Three rollers that can be rotated horizontally are arranged around the microscope hole of the sample stage, and a circular sample that comes into contact with these rollers can be rotated by rotating any one of the rollers, A metallurgical microscope capable of circularly scanning and inspecting a circular sample, characterized in that at least one of the rollers can be freely attached to and removed from the sample stage, and has a fixing means that can be fixed at any position on the sample stage. sample stand.