CN102000788A - Pipe die recycling method - Google Patents
Pipe die recycling method Download PDFInfo
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- CN102000788A CN102000788A CN201010297264XA CN201010297264A CN102000788A CN 102000788 A CN102000788 A CN 102000788A CN 201010297264X A CN201010297264X A CN 201010297264XA CN 201010297264 A CN201010297264 A CN 201010297264A CN 102000788 A CN102000788 A CN 102000788A
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Abstract
The invention provides a pipe die recycling method which is used for recycling a pipe die for solidifying molten steel in continuous casting and simultaneously causing a product to be produced according to certain size. Specifically, the pipe die recycling method comprises the following steps: cladding stripping: stripping a pipe die cladding with an abraded part; internal diameter and external diameter polishing: grinding a cladding-stripped pipe die; after the pipe die is inserted into a dabber, removing the abraded part generated by the pipe die by pressing forming to restore internal surface size without shaping an O-shaped ring on the upper end and the lower end of the pipe die; pipe cutting and processing step: cutting and processing the lower end part of the pipe die with enlarged length and external diameter size relatively to initial pipe die because the pipe die is in pressing forming; internal diameter polishing step: researching the internal diameter of the internal peripheral surface of the pipe die; internal diameter cladding step: forming the cladding on the internal peripheral surface of the pipe die; and external polishing step: grinding the external peripheral surface of the pipe die. The pressing forming step is characterized in that a die and a forming roll are used for pressing and shaping.
Description
Technical field
The present invention involves pipe die regeneration method, particularly at the pipe die that uses in the steel mill continuous casting work, by removing its abrading section, restoring the pipe die regeneration method that the inside dimensions realization reuses.
Background technology
Pipe die is a steel mill in order to one of mould product form of continuous casting, and the molten steel Continuous Flow of fusing is cooled after simultaneously can obtain the product of required form.But pipe die produces to solidify during invar water flows in continuous casting usually and makes the external diameter position of molten steel solidification slip over pipe die internal diameter position and cause friction.Especially as shown in Figure 1, pipe die (1) and lower end inner peripheral surface invar water-setting causes friction strengthen to produce abrading section (2) admittedly, circular cone distortion in pipe die (1) termination very easily causes to occur in the continuous casting work interrupting dangerous and can't obtaining required cast article shape.So pipe die uses the pipe die that must scrap processing, more renew after a period of time in continuous casting work, thereby cause casting continuously the rising of producing unit price and equipment maintenance cost in the production.
Summary of the invention
The technical problem to be solved in the present invention provides pipe die regeneration method, a kind of initial method of making regeneration pipe die under the shape prerequisite that keeps as far as possible promptly is provided, utilize mould and format roll to carry out extrusion forming in the extrusion forming stage, the pipe die abrading section is returned to the figure paper size, and the O shape ring of the upper and lower side of not moulding simultaneously is in case cooling water flow out of.
For the scheme that solves the problems of the technologies described above employing is:
Pipe die regeneration method is provided, with regard to producing with regard to the pipe die of product by certain size simultaneously in order to solidify molten steel in the regeneration continuous casting, specifically comprise the coating stripping bench of peeling off the pipe die coating that the abrading section occurs, grind the interior external diameter polishing stage of having peeled off the coating pipe die, insert in the pipe die behind the mandrel by extrusion forming and remove abrading section that pipe die generates to recover the inner face size but the stage of not moulding pipe die upper and lower side O shape ring, cutting and processing cause the pipe cutting processing stage of the pipe die lower end part of initial relatively pipe die length and outside dimension expansion because of the pipe die extrusion forming, the internal diameter polishing stage of research pipe die inner peripheral surface, in the external diameter polishing stage that the pipe die inner peripheral surface forms the internal diameter coating stage of coating and grinds the pipe die outer peripheral face.The extrusion forming stage characteristic is to utilize mould and format roll to carry out extrusion forming.
The above-mentioned extrusion forming stage utilizes mould to carry out extrusion forming, and format roll can adopt two to be the mortar shape or to adopt four to be cylindric format roll.
Pipe die lower end part inner peripheral surface is preferably implemented chrome plating or nickel-phosphorus (Ni-P) alloy layer in the above-mentioned internal diameter coating stage.
The position of format roll contact pipe die outer peripheral face is preferably formed as a plurality of male and fomale(M﹠F)s.
Preferably pipe die is immersed in the hydrochloric acid solution in the coating stripping bench and peel off chrome plating.
Outside diameter of mandrel is preferably identical with the internal diameter size of the pipe die design phase use of making in the extrusion forming stage.
Good effect of the present invention is: can make the pipe die lower end part that generates the abrading section return to the initial design state, can be reinstalled in and continue in the continuous casting equipment to use, realize reducing continuous casting production unit price and maintenance cost with this.And adopt mould and format roll to make pipe die length in the extrusion forming stage, shape when keeping pipe die as far as possible and make at first with this along the two-way extension of upper and lower end.
Description of drawings
Fig. 1 has shown the cross section of pipe die state in the common continuous casting work.
Fig. 2 has shown the pipe die regeneration order of an embodiment of the present invention.
Fig. 3 and Fig. 4 have shown a kind of embodiment of pipe die extrusion forming stage (S3) format roll.
Fig. 5 has shown a kind of embodiment in pipe die extrusion forming stage (S3) among Fig. 2.
Fig. 6 amplifies and has shown A part among Fig. 5.
Fig. 7 has shown the mould extrusion forming stage.
Among the figure, 100, pipe die, 110, the abrading section, 120, O shape ring, 200, mandrel, 300, format roll.
The specific embodiment
Describe related embodiment of the present invention with reference to the accompanying drawings in detail.Word of using in this detailed content and the claim scope or word explanation should not be limited to usually or the dictionary implication; the inventor is in order to illustrate its invention with the best approach; stand in and suitably to define the term notion in principle, should make an explanation with implication and the notion that meets the technology of the present invention thought.
Therefore, the embodiment of record and drawing formation only were a kind of embodiment of optimum of the present invention during this described in detail, did not represent all technological thoughts of the present invention.May occur planting equipollent more than alternative during therefore, with regard to this patent application and variation should be understood.
Fig. 2 has shown the order of an embodiment of the present invention pipe die regeneration method.
As shown in the figure, pipe die regeneration method is through coating stripping bench (S1), interior external diameter polishing stage (S2), pipe die extrusion forming stage (S3), pipe cutting processing stage (S4), internal diameter polishing stage (S5), internal diameter coating stage (S6), interior external diameter polishing stage (S7) in the embodiment of the invention, and processing realizes that the continuous casting back generates reusing of wearing and tearing (110) pipe die (100).
At first, pipe die (100) makes product produce continuously by certain size in order to solidify molten steel in continuous casting simultaneously, therefore uses position, a period of time posterior end inner peripheral surface will form abrading section (110).
The pipe die (100) that generates abrading section (110) immerses in the hydrochloric acid solution finishes the coating stripping bench (S1) of peeling off the inner peripheral surface chrome plating.
After treating that pipe die coating stripping bench (S1) finishes, implement grinder and grind the interior external diameter polishing stage (S2) that pipe die (100) is peeled off the inner peripheral surface and the outer peripheral face of coating.
Interior external diameter polishing stage (S2) by removing pipe die (100) lower end part inner peripheral surface and outer peripheral face surperficial remaining foreign matter and remove abrading section (110) cut etc. so that improve the surface roughness of pipe die (100) inner peripheral surface and outer peripheral face during extrusion forming.
Fig. 3 and Fig. 4 have shown a kind of embodiment of pipe die extrusion forming stage (S3) format roll (300), Fig. 5 has shown a kind of embodiment of the present invention, Fig. 6 amplifies and has shown the A part among Fig. 5, and the abrading section (110) that has stressed pipe die (100) lower end part in particular changes.
After stage, (S2) finished pipe die (100) inner peripheral surface and outer peripheral face grinding work through interior external diameter polishing, in pipe die (100), insert mandrel (Mandrel) (200) as shown in Figure 5, implement to utilize format roll (roll) (300) externally to carry out the pipe die extrusion forming stage (S3) of extrusion forming.
Format roll (300) can adopt 2 format roll (see figure 3)s of mortar shape or adopt 4 format roll (see figure 4) extrusion forming pipe dies cylindraceous (100).Adopt 4 format rolls cylindraceous to help evenly enlarging pipe die (100) outer peripheral face.
As Fig. 3, Fig. 4, Fig. 5, shown in Figure 7, behind mould and format roll extrusion forming pipe die, the variation that length is extended along the two ends length direction takes place on the pipe die.
The internal diameter size that the design phase used when this moment, mandrel (200) external diameter was with initial manufacturing pipe die (100) is identical.Be that mandrel (200) preferably uses corresponding to above-mentioned pipe die (100) the internal diameter specification before abrading section (110) formation.
Mandrel (200) inserts pipe die (100) aftershaping roller (300) with extrusion forming pipe die (100) outside left.
Here, format roll (300) preferably uses pipe die (100) outer peripheral face contact portion to form a plurality of concavo-convex types as shown in Figure 5.
Concavo-convex at outer peripheral face formation depression position, and the abrading section (110) of pipe die (100) inner peripheral surface is filled according to formed depression, pipe die (100) occurs length along its length and extends variation.
Through the pipe die extrusion forming stage (S3), the abrading section (110) that forms on pipe die (100) the lower end part inner peripheral surface is filled according to change of shape.This moment is in order to prevent that pipe die (100) upper and lower end position O shape ring is by moulding, utilize hydraulic cylinder to be moved into forming roll (300) backward in the time of between upper and lower O shape ring is by format roll (300), remainder format roll (300) is then at normal position moulding pipe die (100).
Because of pressurization pipe die (100) end is elongated,, implements cutting and process the pipe cutting processing stage (S4) that pipe die (100) is extended length in the extrusion forming stage (S3) in order to keep identical with the initial length of using in the design phase when making pipe die (100).
The length of pipe design phase when the cutting processing stage, (S4) utilized machining center to make initial manufacturing pipe die (100) and extrusion forming stage (S3) and above-mentioned pipe die (100) length and outside dimension are identical, so that operation can be installed on the Casting Equipment after finishing.
After the pipe cutting processing stage (S4) of above-mentioned cutting and processing pipe die (100) lower end part certain-length finishes, implement the internal diameter polishing stage (S5) that grinder grinds pipe die (100) inner peripheral surface.
Improve the surface roughness of pipe die (100) inner peripheral surface, the process of removing foreign matter by internal diameter polishing stage (S5), be convenient to the adhesion of internal diameter coating stage (S6) coating.
After grinding pipe die (100) inner peripheral surface, implement pipe die (100) inner peripheral surface carries out coating with chromium or nickel-phosphorus (Ni-P) alloy the internal diameter coating stage (S6).
The internal diameter coating stage (S6) is on pipe die (100) inner peripheral surface that passes through coating stripping bench (S1) and interior external diameter polishing stage (S2) and internal diameter polishing stage (S5) cleaning inner peripheral surface coating in regular turn, state when implementing chrome plating or nickel-phosphorus (Ni-P) alloy layer and making it recover initial the manufacturing, the wearability when pipe die (100) inner peripheral surface being had be same as initial manufacturing.
Above-mentioned nickel-phosphorus (Ni-P) is if the ratio of phosphorus (P) exceeds 15% and promptly can cause the high temperature rigid fragility in the alloy layer, so its ratio is preferably lower than 15%.
Finish internal diameter coating stage (S6) back and implement the external diameter polishing stage (S7) that grinder grinds pipe die (100) outer peripheral face.
Remove pipe die (100) outer peripheral face foreign matter, improve surface roughness by external diameter polishing stage (S7).
As mentioned above, identical shape, length and coating state in the time of can returning to initial design through pipe die (100) the lower end part inner peripheral surface that generates abrading section (110) after the regeneration stage can be reinstalled in and continue on the continuous casting equipment to use.
In sum, the present invention is illustrated with regard to above qualification embodiment and drawing, but the present invention is not limited to this.The all personnel that have common knowledge of the technical field of the invention all can the technology of the present invention thought and below in the impartial scope of claim that writes down, carry out multiple modification, change and distortion.
Claims (8)
1. pipe die regeneration method is characterized in that: comprise the coating stripping bench of peeling off the pipe die coating that the abrading section occurs, grind the interior external diameter polishing stage of having peeled off the coating pipe die, insert in the pipe die behind the mandrel by extrusion forming and remove abrading section that pipe die generates to recover the inner face size but the stage of not moulding pipe die upper and lower side O shape ring, cutting and processing cause the pipe cutting processing stage of the pipe die lower end part of initial relatively pipe die length and outside dimension expansion because of the pipe die extrusion forming, the internal diameter polishing stage of research pipe die inner peripheral surface, in the external diameter polishing stage that the pipe die inner peripheral surface forms the internal diameter coating stage of coating and grinds the pipe die outer peripheral face; In the extrusion forming stage, utilize mould and format roll to carry out extrusion forming.
2. pipe die regeneration method according to claim 1 is characterized in that: the format roll in extrusion forming stage adopts two format rolls of mortar shape.
3. pipe die regeneration method according to claim 1 is characterized in that: the format roll in extrusion forming stage adopts four format rolls cylindraceous.
4. pipe die regeneration method according to claim 1 is characterized in that: the extrusion forming stage is adopted mould.
5. pipe die regeneration method according to claim 1 is characterized in that: the internal diameter coating stage is implemented chrome plating or nickel-phosphorus (Ni-P) alloy layer at pipe die lower end part inner peripheral surface.
6. pipe die regeneration method according to claim 1 is characterized in that: the surface of mould and format roll contact pipe die outer peripheral face forms a plurality of concavo-convex.
7. pipe die regeneration method according to claim 1 is characterized in that: pipe die immerses in the hydrochloric acid solution and peels off chrome plating on the coating stripping bench.
8. pipe die regeneration method according to claim 1 is characterized in that: the internal diameter size that the design phase used when outside diameter of mandrel made with pipe die in the extrusion forming stage is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010297264XA CN102000788A (en) | 2010-09-30 | 2010-09-30 | Pipe die recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010297264XA CN102000788A (en) | 2010-09-30 | 2010-09-30 | Pipe die recycling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102000788A true CN102000788A (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010297264XA Pending CN102000788A (en) | 2010-09-30 | 2010-09-30 | Pipe die recycling method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087564A (en) * | 1992-12-02 | 1994-06-08 | 张孚镇 | Crystallizer copper pipe of continuous casting machine system, repair technology and device |
| CN1355080A (en) * | 2000-11-30 | 2002-06-26 | 王英杰 | Hidden arc build-up welding method for repairing internal surface of pipe-casting mould |
| KR20100098060A (en) * | 2009-02-27 | 2010-09-06 | 남기홍 | Recycling method of tube mold |
-
2010
- 2010-09-30 CN CN201010297264XA patent/CN102000788A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087564A (en) * | 1992-12-02 | 1994-06-08 | 张孚镇 | Crystallizer copper pipe of continuous casting machine system, repair technology and device |
| CN1355080A (en) * | 2000-11-30 | 2002-06-26 | 王英杰 | Hidden arc build-up welding method for repairing internal surface of pipe-casting mould |
| KR20100098060A (en) * | 2009-02-27 | 2010-09-06 | 남기홍 | Recycling method of tube mold |
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Application publication date: 20110406 |