CN204177661U - A kind of can the Universal metallographic sample fixture of quick-clamping - Google Patents

Abstract

The utility model discloses a general-purpose metallographic sample fixture that can be clamped quickly, which comprises a fixture seat, a positioning device and a clamping bolt. The bottom plate with a threaded through hole in the center is spot welded together; the positioning device is composed of a lifting guide rail with a certain length of smooth rod at the end and a positioning pad with a smooth blind hole in the center; the clamping bolt is For slotted plain end cylinder head bolts. The utility model solves the problem that it is difficult to ensure the level of the sample to be ground and polished in the prior art, thus the problem of difficult positioning, solves the problem that the prior art cannot accurately grind off the surface layer of a specific thickness of the sample, and the prior art cannot The preparation of samples of different specifications such as columns, blocks and flakes is commonly used to achieve common problems, thereby simplifying operations and improving efficiency.

Description

A general-purpose metallographic sample fixture that can be clamped quickly

technical field

The utility model relates to a general-purpose metallographic sample clamp that can be clamped quickly.

Background technique

The preparation of metallographic samples is one of the most basic and important skills for research materials and related professionals. The preparation technology directly affects the reliability of experimental results and the level of work efficiency. At present, there are usually three methods for the preparation of metallographic samples:

First, directly use a hand-held sample to grind and polish on sandpaper and a polishing machine. For samples with many samples or small sizes, this method is not only time-consuming and laborious, but also difficult to obtain ideal samples, especially in When operating on a semi-automatic polishing machine, it is difficult to maintain a balanced clamping force, and it is also prone to danger, causing double damage to the sample and personnel.

Second, grind and polish the sample after inlaying. This method can better solve the disadvantages of directly holding the sample. However, for alloys such as titanium and zirconium that are easy to absorb hydrogen and oxygen, the inlay powder will It will pollute the sample and affect the experimental results to a certain extent. Cold mounting takes too long and the efficiency is too low. In addition, due to the limitation of the size of the sample stage, the mounting The number of samples that can be placed at one time is small, which greatly reduces the efficiency of the experiment and increases the cost of the experiment.

Third, use some special fixtures to hold the sample and then grind and polish it. This method can successfully solve the drawbacks of the first two methods. However, as far as the current fixture is concerned, it is often only suitable for a certain specification For samples with common specifications and shapes, it is necessary to prepare a variety of different fixtures to achieve better results.

In addition, the three key points are: none of the current fixtures can guarantee the levelness of the sample to be ground and polished, which makes it difficult to position the sample when it is clamped; the current technology cannot accurately grind out a specific thickness. Therefore, when it is necessary to prepare thinner samples, such as experiments such as transmission electron microscope observation and DTA/DSC thermal analysis, the preparation of samples is very difficult; the current technology has no way to adapt to different cutting methods of samples. Cutting off the heat-affected layer and heat-strained layer of a specific thickness will also have a greater impact on experiments that require high organizational observation of the polished surface of the sample.

Utility model content

The purpose of this utility model is to provide a general-purpose metallographic sample fixture that can be clamped quickly: first, according to the preparation of common columnar, massive and thin-sheet samples, only one kind of fixture can be prepared to complete all experiments, Realize versatility; Second, under the premise of ensuring that the surface of the sample to be ground and polished is completely horizontal, realize rapid positioning and clamping of the sample; Third, it is more convenient to obtain thin sheet samples with accurate thickness; Fourth, According to the different thermal cutting methods of the sample, the surface layer of a specific thickness can be removed more accurately, and the protruding height of the sample can be adjusted conveniently to achieve rapid multiple clamping.

In order to achieve the above object, the utility model adopts the following technical solutions:

A general-purpose metallographic sample fixture that can be clamped quickly. It includes a fixture seat, a positioning device and a clamping bolt. The fixture seat is a cylindrical cylinder processed into a specific shape in the center and has a threaded through hole The bottom plate of the cylinder is spot welded together. One side inside the cylinder is a smooth platform, and the other side facing it is an arc-shaped groove. The side wall of the cylinder is processed with a threaded through hole at a certain distance from the upper surface. The clamping screw fixes the sample on the inner wall of the corresponding side of the cylinder through the threaded hole of the side wall; The lifting guide rail and the positioning backing plate with a smooth blind hole in the center are composed. The threaded through hole in the center of the bottom plate screwed into the lifting guide rail is matched with the blind hole in the center of the positioning backing plate to achieve the purpose of rapid lifting and precise positioning.

The gap between the positioning backing plate and the inner wall of the cylinder is 1-2 mm, which can move up and down freely. The end of the lifting guide rail is a smooth rod without thread at 3 mm, and the matching gap with the blind hole in the center of the positioning backing plate It is 1mm and can rotate freely in the hole.

The turntable at the head of the lifting guide rail rotates once a week, the feeding height of the positioning backing plate is 1-3mm, the bottom surface of the turntable has scales, and knurling is processed on the side.

The outer diameter of the fixture seat is a, the height is b, and the distance between the center of the threaded hole on the side wall of the cylinder and the upper surface is c, wherein a is 20-30mm, b is 15-25mm, and c is 2-4mm. The thickness of the positioning backing plate is d, and d≥c, so as to ensure that the positioning backing plate is clamped and fixed when preparing thin sheet samples.

Compared with the prior art, the utility model has the beneficial effects:

The fixture mainly uses the precise and conveniently adjustable lifting guide rail and the positioning backing plate to realize the rapid positioning of the sample, thus solving the problem that the existing technology is difficult to ensure the level of the sample to be ground and polished, and the positioning is difficult. It solves the problem that the existing technology cannot accurately grind off the surface layer of a specific thickness, and the existing technology cannot be universally used for the preparation of samples of different specifications such as columnar, block and thin slices, etc., thereby simplifying the operation and improving the efficiency.

Description of drawings

Fig. 1 is a sectional view of the utility model.

Fig. 2 is a top view of the utility model.

Fig. 3 is a schematic diagram of clamping block sample of the utility model.

Fig. 4 is a schematic diagram of clamping a columnar sample of the utility model.

Fig. 5 is a schematic diagram of preparing a thin sheet sample according to the present invention.

Fig. 6 is a schematic diagram of a turntable with a scale on the head of the lifting guide rail.

Detailed ways

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

As shown in Figure 1, Figure 2 and Figure 6, a general-purpose metallographic specimen fixture that can be clamped quickly includes a fixture seat, a positioning device and a clamping bolt 3, and the fixture seat is processed by the center. A cylindrical body 4 of a specific shape is spot-welded with a bottom plate 2 with a threaded through hole in the center. One side inside the body 4 is a smooth platform, and the other side facing it is an arc-shaped groove. The side wall of the cylinder 4 is processed with a threaded through hole at a certain distance from the upper surface, and the clamping screw 3 fixes the sample on the inner wall of the corresponding side of the cylinder 4 through the threaded through hole of the side wall; the positioning The device is composed of a lifting guide rail 5 with a smooth rod of a certain length at the end, a turntable with a scale on the head, and a positioning backing plate 1 with a smooth blind hole in the center. The lifting guide rail 5 is screwed into the threaded through hole at the center of the bottom plate 2 and The blind holes in the center of the positioning backing plate 1 fit together to achieve the purpose of fast lifting and precise positioning.

The gap between the positioning backing plate 1 and the inner wall of the cylinder body 4 is 1-2mm, which can move up and down freely. The fit gap of the hole is 1mm, and it can rotate freely in the hole.

Every time the turntable at the head of the lifting guide rail 5 rotates once, the height of the positioning backing plate 1 feed is 1-3mm, the bottom surface of the turntable has scales, and the side is processed with knurling.

The outer diameter of the clamp seat is a, the height is b, and the distance between the center of the threaded hole on the side wall of the cylinder body 4 and the upper surface is c, wherein a is 20-30mm, b is 15-25mm, and c is 2-4mm. The thickness of the positioning backing plate 1 is d, and d≥c, so as to ensure that the positioning backing plate 1 is clamped and fixed when preparing thin sheet samples.

Example 1

As shown in Figure 3, place the smooth platform of the block sample close to the side wall of the cylinder 4 on the positioning pad 1 to ensure that the center of the sample and the center of the threaded hole are basically on a vertical plane. According to the heat-affected layer on the surface of the sample The empirical value of the thickness, rotate the lifting guide rail 5 until the surface of the sample protrudes a certain distance from the platform surface, rotate the clamping bolt 3 to fix the sample firmly, then grind and polish the sample, and loosen the clamping bolt after completion 3. Take out the sample.

Example 2

As shown in Figure 4, the clamping bolt 3 is screwed into the threaded hole on the other side of the cylinder 4, and the columnar sample is placed on the positioning backing plate 1 close to the arc-shaped groove of the side wall of the cylinder 4, according to Embodiment 1 The corresponding steps fix the sample firmly and operate in sequence.

Example 3

As shown in Figure 5, when preparing a thin sheet sample, buckle the fixture upside down on the smooth glass plate, rotate the lifting guide rail 5 to make the positioning pad 1 close to the glass plate, and stick the thin sheet sample on the glass plate with the help of 502 glue On the positioning backing plate 1, rotate the lifting guide rail 5 to feed the positioning backing plate 1 downward for a specific distance, rotate the clamping bolt 3, make one side of the positioning backing plate 1 close to the inner wall of the fixture seat and fix it, and grind the sample until it meets the fixture seat After the surface is even, loosen the clamping screw 3, take out the positioning pad 1 and place it in a beaker filled with alcohol, put it into an ultrasonic cleaning machine, dissolve the glue, and obtain a sheet with a specific thickness. the

Claims (4)

1. A general-purpose metallographic sample fixture that can be quickly clamped, characterized in that it includes a fixture seat, a positioning device and a clamping bolt (3), and the fixture seat is a cylinder that is processed into a specific shape by the center A cylindrical body (4) and a bottom plate (2) with a threaded hole in the center are spot welded together. One side inside the cylindrical body (4) is a smooth platform, and the other side facing it is an arc-shaped groove. The side wall of the cylinder (4) is processed with a threaded through hole at a certain distance from the upper surface, and the clamping screw (3) clings the sample to the corresponding side of the cylinder (4) through the threaded through hole on the side wall The positioning device is composed of a lifting guide rail (5) with a smooth rod of a certain length at the end, a turntable with a scale on the head, and a positioning pad (1) with a smooth blind hole in the center. The guide rail (5) is screwed into the threaded through hole in the center of the bottom plate (2) and the blind hole in the center of the positioning backing plate (1) is matched together to achieve rapid lifting and precise positioning. 2. The general-purpose metallographic sample fixture that can be quickly clamped according to claim 1, characterized in that: the gap between the positioning backing plate (1) and the inner wall of the cylinder (4) is 1-2mm , can move up and down freely, the end 3mm of the lifting guide rail (5) is a smooth rod without thread, and the matching gap with the blind hole in the center of the positioning backing plate (1) is 1mm, and can rotate freely in the hole. 3. The general-purpose metallographic sample fixture that can be quickly clamped according to claim 1, characterized in that: every time the turntable at the head of the lifting guide rail (5) rotates once, the positioning backing plate (1) The height of the feed is 1-3mm, the bottom surface of the turntable has a scale, and the side is knurled. 4. The general-purpose metallographic sample fixture that can be clamped quickly according to claim 1, characterized in that: the outer diameter of the fixture seat is a, the height is b, and the center of the threaded hole on the side wall of the cylinder (4) is The distance from the upper surface is c, wherein a is 20-30mm, b is 15-25mm, c is 2-4mm, and the thickness of the positioning pad (1) is d, and d≥c, so as to ensure the preparation of thin sheets Clamp and fix the positioning backing plate (1) when taking samples.