KR101254710B1 - Recycling method of tube mold - Google Patents

Abstract

The present invention relates to a regeneration method for reusing a tube mold to produce a continuous product in a constant size while solidifying the molten metal during continuous casting, the plating peeling step of peeling the plating layer of the tube mold in which the worn part is produced, Internal and external inclined working step of grinding the tube mold with the plated layer peeled off, inserting the mandrel into the tube mold, and pressing the mold using a forming roll equipped with a hydraulic cylinder to remove the worn part formed in the tube mold. Tube cutting processing step for cutting and processing the lower end of tube mold, which is longer than tube mold length and outer diameter dimension when designed by pressure forming step, tube mold pressure forming step and external diameter growing step, and internal diameter imaginary work for grinding the inner surface of tube mold Step, tube mold lower part or upper part to develop O-ring part of lower part or upper part of tube mold An inner diameter plating step of forming a plating layer on the inner circumferential surface of the inner surface of the tube mold, and an outer circumferential working step of grinding the outer circumferential surface of the tube mold. It provides a tube mold regeneration method that can reduce the cost by eliminating the outer diameter development work.

Description

Tube Mold Recycling Method {RECYCLING METHOD OF TUBE MOLD}

The present invention relates to a tube mold regeneration method, and more particularly, to be able to reuse and process the wear of the tube mold used in the continuous casting operation in the steelmaking plant, by connecting the hydraulic cylinder to the forming roll, the tube mold is forming roll The present invention relates to a tube mold regeneration method for reducing cost by eliminating the external diameter growth operation performed when the press molding is performed by preventing the press molding from being formed on the upper and lower portions of the tube mold in which the O-ring portion is formed.

Tube mold is to produce a continuous product in a constant size while solidifying the molten water during continuous casting, the wear portion is formed on the inner peripheral surface of the lower end after a certain period of use.

Thus, tube molds should be discarded after a certain period of time when used in continuous casting and replaced with new tube molds. Therefore, in order to solve the problem that the production cost and equipment maintenance cost of the product increases during the production of the product by continuous casting, Although it is recycled and used by the method, when pressing the entire tube mold including the upper and lower parts, the volume is reduced as the upper or lower portion of the tube mold, which is prominently worn, is compressed.

Therefore, the outer diameter growth operation for restoring the reduced volume of the upper or lower tube mold which is prominent by press forming by copper plating, copper yarn, or metal bond operation to the original size during the initial design stage of the tube mold before compression. There is a problem that needs to be done further.

In order to solve the above-mentioned problems, the press molding is not performed at a point of 20 mm around the O-rings formed on the upper and lower portions of the tube mold, so that the volume of the upper or lower tube mold is reduced during press molding. The purpose is to eliminate the external diameter development work to restore the original size to the volume (volume) during the initial design stage, thereby eliminating process hassles and reducing the cost burden.

In order to achieve the above object, in the regeneration method for reusing the tube mold to solidify the molten metal during the continuous casting and to produce a continuous product in a constant size, to remove the plated layer of the tube mold is worn Plating peeling step, inner and outer sloping work step of grinding the tube mold peeled off the plating layer, after inserting the mandrel into the tube mold, press molding using a forming roll equipped with a hydraulic cylinder to remove the worn part produced in the tube mold Tube molding press forming step,

Tube mold cutting step for cutting and processing the tube mold, which is larger than the length and outer diameter of the tube mold when designed by the tube molding press molding step and the external diameter growing step, the inner diameter imaginary step for grinding the inner surface of the tube mold, the bottom of the tube mold or In order to cultivate the O-ring part of the upper end, the inner diameter plating step of forming a plating layer on the inner circumferential surface of the lower end or the upper end of the tube mold, and the outer diameter imaginary work step of grinding the outer circumferential surface of the tube mold, to provide.

Tube mold regeneration method according to the present invention by connecting the hydraulic cylinder to the forming roll to omit the pressing to the O-ring portion of the upper and lower when the tube mold passes through the forming roll, the outer diameter development work that was performed when the pressing is made By omitting the cost can be reduced.

1 is a flow chart for the tube mold regeneration method according to the invention,
2 and 3 is a view showing a forming roll equipped with a hydraulic cylinder used in the tube mold regeneration method according to the present invention,
4 and 5 are views illustrating a state in which the tube mold is regenerated through a forming roll equipped with a hydraulic cylinder used in the tube mold regeneration method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a flow chart for the tube mold regeneration method according to an embodiment of the present invention.

As shown in the tube mold regeneration method of the present embodiment, the plating peeling step (S1), internal and external inclined phase work step (S2), tube molding pressure forming step (S3), outer diameter growth step (S4), tube cutting processing step ( S5), through the inner diameter mirror working step (S6), the inner diameter plating step (S7), the outer diameter mirror working step (S8) is to process to reuse the tube mold 100 generated by the continuous casting wear part. .

First, the tube mold 100 is to produce a continuous product in a constant size while solidifying the molten water during continuous casting, the wear portion 110 is formed on the inner peripheral surface of the lower end when used for a certain period.

Such, the wear part 110 is carried out the plating peeling step to peel off the plating layer by immersing the tube mold 100 generated in the hydrochloric acid solution (S10).

When the plating peeling step (S10) of the tube mold is completed, the inner and outer inclined working step of grinding the inner circumferential surface and outer circumferential surface from which the plating layer of the tube mold 100 is peeled off using a grinder (S20).

The internal and external inclined working step (S20) is to remove the foreign substances remaining on the inner peripheral surface and the outer peripheral surface of the lower end of the tube mold 100 and the scratches of the wear portion 110, etc. by pressing the tube mold 100 ) Improves the surface roughness of the inner and outer circumferential surfaces.

2 and 3 is an embodiment of the forming roll 300 of the tube mold pressing step (S3), Figures 4 and 5 are views showing one embodiment of the present invention.

As shown in Figures 2 and 3, the forming roll 300 can be press-molded the tube mold 100 using two forming rolls of a mortar shape or four forming rolls of a cylindrical shape. When the four forming rolls of the cylindrical shape is used, the outer circumferential surface of the tube mold 100 is more evenly stretched.

When the grinding work on the inner peripheral surface and the outer peripheral surface of the tube mold 100 is completed through the internal and external inclined working step (S20), a mandrel (Mandrel) on the tube mold 100 as shown in FIGS. 4 and 5. After inserting the 200, a tube mold press forming step is performed by pressure molding from the outside using the forming roll 300 (S30).

The tube mold press forming step (S30) is the forming roll 300 and the hydraulic cylinder 400 is connected, the step of separating the forming roll 300 and the lower portion of the tube mold 100 (S31), the forming roll Contacting step 300 and the tube mold 100 (S32) and the step of spaced apart the upper portion of the forming roll 300 and the tube mold 100 (S33).

That is, the step (S31) of separating the lower part of the forming roll 300 and the tube mold 100 passes through the tube mold 100 by operating the hydraulic cylinder 400 connected to the forming roll 300. The forming roll 300 and the tube mold 100 are expanded at an area of 20 mm around the O-ring portion 120 formed at the lower portion of the forming roll 300 and the tube mold 100 by enlarging an area. Keep away from contact.

In the case of the forming roll 300 having two mortar shapes, as the hydraulic cylinder 400 operates, the two forming rolls 300 having the mortar shape have a distance between the left and right through horizontal movement, and thus the tube In the case of the forming roll 300 having an enlarged passage area through which the mold 100 passes and having four cylindrical shapes, the support frame 600 supporting the forming roll 300 as the hydraulic cylinder 400 operates. A portion of the forming roll 300 is accommodated in the receiving space 610 formed on the inner circumferential surface of the c) and the passage area through which the tube mold 100 passes is enlarged.

In the step (S32) of contacting the forming roll 300 and the tube mold 100, the passage area is enlarged, and after passing 20 mm around the O-ring portion 120 formed at the lower portion of the tube mold 100, By the hydraulic cylinder 400, the distance between the two forming rolls 300 made in the shape of the mortar is closer, the forming roll 300 is approached in contact with the tube mold 100, the four cylindrical shape In the case of the forming roll 300, a portion of the forming roll 300 accommodated in the receiving space 610 formed on the inner circumferential surface of the support frame 600 for supporting the forming roll 300 comes out of the forming roll 300 As the tube mold 100 approaches, an uneven portion is formed on the mold surface.

Finally, the step (S33) of separating the upper portion of the forming roll 300 and the tube mold 100, as in the 'S31' step, to remove the hydraulic pressure of the hydraulic cylinder 400, the O-ring portion formed on the upper ( At 20mm around the 120, the forming roll 300 and the tube mold 100 are spaced apart from each other so as not to contact each other.

As described above, at 20 mm around the O-ring portion 120 formed at the upper and lower portions in the 'S30' step, the forming roll 300 and the tube mold 100 are separated from each other so as not to be press-molded. In order to maintain the same as the dimensions used in the design stage when manufacturing the initial tube mold (100).

That is, when the entire molding of the tube mold 100 including the 20 mm point around the O-ring portion 120 formed on the upper and lower portions, the O-ring portion 120 is compressed and the volume is reduced, copper plating, copper as much as the reduced volume Although it is necessary to additionally perform an external diameter growth operation to increase the thickness so as to have dimensions during the initial design stage of the tube mold 100 before the thermal spraying or the metal bonding operation is compressed by the forming roll 300, When press-molding the tube mold 100 except for the 20mm point around the O-ring portion 120 formed in the lower portion, the external diameter growth operation can be omitted.

The length of the tube mold 100 is increased so that the end of the tube mold 100 increased by the pressure in the pressing molding step (S30) to be the same as the length used in the design step when the tube mold 100 is initially manufactured. Carrying out the cutting tube cutting step (S40).

The tube cutting processing step (S40) is the same as the length of the tube mold 100 through the press molding step (S30) and the length of the design step when manufacturing the first tube mold 100 using a machining center Allow the process to be re-installed in the casting plant upon completion.

When the tube cutting processing step (S40) of cutting the lower end portion of the tube mold 100 by a predetermined length is completed, an inner diameter working step (S50) of grinding the inner circumferential surface of the tube mold 100 with a grinder is performed.

That is, the inner circumferential surface roughness of the tube mold 100 is improved by the inner diameter mirror work step (S50) and foreign matters are removed to facilitate adhesion of the plating layer during the inner diameter plating step (S6).

After grinding the inner circumferential surface of the tube mold 100, an inner diameter plating step of chromium plating or nickel-phosphorus (Ni-P) alloy plating is performed on the lower and upper inner circumferential surfaces of the tube mold 100 (S60).

Accordingly, the inner diameter plating step (S60) is the tube mold 100 in which the plating layer on the inner circumferential surface is removed while the plating peeling step (S1), the inner and outer mirror work step (S2) and the inner diameter work step (S6) are removed. The inner circumferential surface of the lower end of the tube mold 100 is subjected to chromium plating or nickel-phosphorus (Ni-P) alloy plating on the inner circumferential surface of the lower end of the tube to have the same wear resistance as in the initial manufacture.

When the ratio of phosphorus (P) in the nickel-phosphorus (Ni-P) alloy plating is more than 15%, the strength at high temperature becomes weak, so the ratio is preferably 15% or less.

In addition, since the pressure is not made in the 'S30' step, the worn part of the inner portion remaining at the 20 mm point around the O-ring part 120 formed on the upper and lower parts of the tube mold 100 is the inner diameter plating step (S60). Through the tube mold 100 is first reproduced to match the dimensions in the design stage during manufacture.

When the inner diameter plating step (S60) is completed, the outer diameter finishing step (S70) of grinding the outer peripheral surface of the tube mold 100 using a grinder.

The outer diameter working step (S70) removes the foreign matter on the outer peripheral surface of the tube mold 100, and improves the surface roughness.

Through such a regeneration step, the inner circumferential surface of the lower end and the upper end of the tube mold 100 in which the worn part is formed becomes the same shape, length, and plating state as in the initial design, and thus can be reinstalled and used in a continuous casting facility.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications, changes and variations are possible within the scope of the claims to be described.

100: tube mold 120: O-ring
200: mandrel 300: forming roll
400: hydraulic cylinder 600: support frame
610: accommodation space

Claims (4)

delete In the regeneration method for reusing the tube mold 100 to produce a continuous product in a constant size while solidifying the molten metal during continuous casting,
(a) a plating peeling step of peeling a plating layer of the tube mold 100 in which a worn part is generated;
(b) an internal and external inclined working step of grinding the tube mold 100 in which the plating layer is peeled off;
(c) After the mandrel 200 is inserted into the tube mold 100, the molded part is press-molded using the forming roll 300 equipped with the hydraulic cylinder 400 to produce a worn portion formed in the tube mold 100. Tube molding press forming step to remove the;
(d) a tube cutting processing step of cutting and processing the tube mold 100, which is increased in comparison with the length and outer diameter of the tube mold 100 when designing the tube mold 100 by pressing;
(e) an inner mirror working step of grinding the inner surface of the tube mold 100;
(f) an inner diameter plating step of forming a plating layer on an inner circumferential surface of the lower end or the upper end of the tube mold; And
(g) an outer diameter working step of grinding the outer surface of the tube mold;
The pressing molding step (c) is
(c-1) expanding the passage area through which the tube mold 100 passes by controlling the forming roll 300 by the hydraulic cylinder 400;
(c-2) After passing the enlarged passage area up to a point of 20 mm around the O-ring portion 120 formed in the lower portion of the tube mold 100, by reducing the passage area by the hydraulic cylinder (400) Pressing the tube mold 100 by the forming roll 300; And
(c-3) the tube mold 100 in a pressurized state before the tube roll 100 passes completely through the forming roll 300, at the point 20mm around the O-ring portion 120 formed on the tube mold 100 And a hydraulic cylinder (400) controlling the forming roll (300) to release the pressurized state to the tube mold (100). The method of claim 2,
When the forming roll 300 is formed in the shape of two mortars, the two forming rolls 300 are horizontally moved horizontally by the hydraulic cylinder 400 to press or pressurize the tube mold 100. Tube mold regeneration method, characterized in that to release the. The method of claim 2,
When the forming roll 300 has four cylindrical shapes, the four forming rolls 300 are formed on the inner circumferential surface of the support frame 600 supporting the forming rolls 300 by the hydraulic cylinder 400, respectively. Tube mold regeneration method characterized in that it is accommodated in the formed receiving space (610) to release the pressurization of the tube mold (100), exposed to pressurize the tube mold (100).

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