KR20040055987A - Apparatus for elecrto-chemical etching with adjustable rod - Google Patents

Abstract

PURPOSE: An apparatus for electro-chemical etching with adjustable rods is provided which is capable of uniformly etching samples as a whole, securing prompt etching speed and easily fabricating various shaped samples through adjustment of gap and height of sample grounding rods. CONSTITUTION: The apparatus comprises a fixed plate(16) which is installed in an upper side of an etching reagent container(5) with being spaced apart from the etching reagent container, and one end of which is cutout; a screw shaft(12) which is penetratingly installed on both surfaces of the cutout one end of the fixed plate, and on which screw thread is formed in such directions that are oppositely directed to each other around the center of length of the screw shaft; sample grounding rod holders(8) which are engaged with the screw threads with being inserted onto the respective screw threads of the screw shaft and movably installed within the cutout width of the fixed plate, and to respective lower parts of which sample grounding rods(1) are fixed; and a precipitation rod(2) fixed onto the fixed plate with being spaced apart from the sample grounding rods in a certain distance.

Description

Electrolytic Etching Equipment with Adjustable Bar Spacing {APPARATUS FOR ELECRTO-CHEMICAL ETCHING WITH ADJUSTABLE ROD}

The present invention relates to an electrolytic etching apparatus capable of adjusting rod spacing for electrically etching a specimen that cannot be chemically etched when observing the structure of a metal material.

Generally, etching is carried out when observing microstructures of metal materials such as iron and nonferrous alloys, and in general, chemical etching is performed by depositing a specimen in an etching reagent or rubbing with a cotton cloth wet with the reagent. .

However, a metal that is not easily corroded, such as stainless steel, cannot be used in such a chemical etching method, and thus, electrolytic etching using electricity should be performed.

In the conventional electrolytic etching apparatus, as shown in FIG. 1, the specimen 6 is immersed in an etching reagent container 5 containing a predetermined amount of the electrolyte solution 7, and the precipitation rod 2 fixed to the fixing plate 15 is attached to the specimen ( 6) is immersed in the electrolyte (7) so as not to contact, and the specimen ground rod (1) fixed to the fixing plate (15) is placed in contact with the specimen (6) and then the specimen ground rod (1) to the specimen (6) Applying a current and voltage set to an electric etching machine (not shown) through the wires 3 and 4, the surface of the specimen 6 is chemically activated, and the speed is different due to the electrochemical potential difference between the microstructures. The furnace was configured to be etched as corrosion progressed.

However, the specimen 6 etched in this way starts etching from the part (a) farthest from the place where the specimen grounding rod 1 is grounded, and the etching proceeds through the middle part (b) to the close part (c). Since the degree of etching is not uniform for each position, the near part (c) is still less etched at the point where the distant part (a) is suitable for etching, and when the close part (c) is a suitable degree, the far part ( a) has already suffered from excessive etching.

In addition, in the case where the specimen 6 has a uniform structure as a whole, even when such a phenomenon occurs, an appropriate part may be selected or photographed or observed, but an experiment or specimen (6) for observing the overall tissue change of the specimen (6) In experiments in which specific tissues, for example, tissues around cracks, were observed at various sites, there was a problem that although the entire specimen 6 had to be uniformly etched, the conventional apparatus could not satisfy this problem.

The present invention is to solve the above problems, the entire specimen can be uniformly etched, the etching speed is fast, the rod spacing that can easily produce a specimen of various shapes by adjusting the spacing and height of the specimen ground rod It is an object of the present invention to provide an adjustable electroetching apparatus.

1 is a perspective view of a conventional unsealed electrolytic etching apparatus,

2 is a perspective view of an electrolytic etching apparatus capable of adjusting rod spacing according to the present invention;

3 is a plan view of FIG.

Explanation of symbols on the main parts of the drawings

1 .... specimen ground rod 2 .... sedimentation rod

5 .... Etching reagent container 6 .... Specimen

7 .... Electrolyte 8 .... Specimen ground rod holder

9 .... Height adjusting screw 10 .... Width adjusting lever

Sliding guide 12.Screw shaft

16..Mounting plate 17..Ground bar groove

18 .... holder activity space

The above object of the present invention, the fixing plate is spaced apart and installed on the upper side of the etching reagent container; A screw shaft disposed through both sides of the cut end of the fixing plate and having threads formed in opposite directions toward both ends with respect to the center of the length; A specimen ground rod holder fitted to each thread of the screw shaft and installed to be movable within the cut width of the fixing plate, and a specimen ground rod fixed at each lower end thereof; It is achieved by providing an electrolytic etching apparatus capable of adjusting the rod spacing, characterized in that comprising a settling rod fixed on the fixed plate at a distance from the specimen ground rod.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a perspective view of the device according to the invention, and FIG. 3 is a plan view of the device of the invention.

According to FIGS. 2 and 3, the specimen ground rod holders 8 on both the left and right sides are penetrated by the sliding guide 11 and the screw shaft 12 and are installed in the holder active space 18.

The sliding guide 11 serves to facilitate the movement of both specimen ground rod holder (8), the screw shaft 12 is formed on both sides of the right screw 13 and the left screw 14 on the outer circumference It is connected to the screw portion formed in the through portion (not shown) of the specimen ground rod holder 8, the width adjustment lever 10 is fixed to one end thereof by the rotation of the width adjustment lever 10 to the left and right It is configured to move the specimen ground rod holder (8).

On the other hand, a part of the fixing plate 16 is provided with a grounding rod groove 17 so that the specimen ground rods 1 on both sides fixed by the height adjustment screw 9 can slide left and right.

The specimen ground rod holder (8), the height adjustment screw (9), the width adjustment lever (10), the sliding guide (11), the screw shaft (12), the ground rod groove (17), and the holder active space (18) Since it can be installed at any angle and size more than one set on the fixing plate 16, the number of specimen ground rods (1) by increasing the number to two, in the case of long specimen (6) can be contacted with both sides of the specimen (6) Specimen ground rod (1) can be installed.

The operation relationship of the present invention having such a configuration will be described.

First, the settling rod (2) is fixed to the fixing plate (16), the height is adjusted using the height adjusting screw (9) of the specimen ground rod holder (8), and then the specimen ground rod (1) is fixed to both sides.

Immerse the specimen ground rod (1) and the precipitation rod (2) in the etching reagent container (5) containing the specimen (6) and the electrolyte (7), the specimen ground rod (1) is immersed in contact with the specimen (6) and the precipitation Rod (2) is immersed so as not to contact the specimen (6).

Here, the specimen 6 is to be excreted in accordance with the specimen ground rods (1) on both sides of the longitudinal direction unlike the conventional.

The width adjusting lever 10 is rotated and adjusted according to the size or shape of the specimen grounding rod 1. When the width adjusting lever 10 rotates, the right screw 13 formed on the outer circumference of the screw shaft 12 and The specimen ground rod holder 8 is opened or retracted to both sides by the left screw 14.

At this time, the sliding guide 11 is provided in the through hole of the specimen ground rod holder 8 for smooth movement of the specimen ground rod holder 8.

When the length of the specimen grounding rod 1 is shortened by repeated etching, the length of the specimen grounding rod 1 may be changed by adjusting the height adjusting screw 9 to change its length.

Next, when the current and voltage set in the electrolytic etching machine (not shown) are applied through the wires (3, 4) connected to the specimen ground rod (1) and the precipitation rod (2), the specimen ground rod (1) from the precipitation rod (2) Because of the close proximity between the contact portions of the specimen 6, the path of charge transfer is short, and the specimen 6 is evenly etched.

As described in detail above, according to the present invention, the test piece can be etched completely and uniformly as a whole, and the etching speed is improved by three times or more compared with the conventional single rod type, and two test piece ground rods are installed to adjust the gap and height. If the various specimens of different sizes can be easily etched while controlling the width by simple operation, the work efficiency is improved and the productivity is greatly improved.

Claims (3)

A fixed plate 16 spaced apart from the etching reagent container 5 and having one end cut out; A screw shaft 12 disposed through both sides of the cut end of the fixing plate 16 and having threads formed in opposite directions toward both ends with respect to the center of the length; A specimen ground rod holder (8) fitted to each thread of the screw shaft (12) to be engaged and installed to be movable within the cut width of the fixing plate (16) and to a specimen ground rod (1) fixed at each lower end thereof; Electrolytic etching apparatus capable of adjusting the rod spacing, characterized in that comprises a settling rod (2) fixed on the fixed plate (16) at a distance from the specimen ground rod (1). The method of claim 1, The specimen ground rod (1) is an electrolytic etching apparatus capable of adjusting the rod spacing, characterized in that the length is adjustable in the vertical direction on the specimen ground rod holder (8) by locking and unlocking the height adjustment screw (9). The method of claim 1, One end of the screw shaft 12 is an electrolytic etching apparatus capable of adjusting the rod spacing, characterized in that the width adjustment lever 10 is installed to rotate it.