CN202893865U - Extrusion core rod for hot-extrusion production of seamless steel pipe - Google Patents
Extrusion core rod for hot-extrusion production of seamless steel pipe Download PDFInfo
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- CN202893865U CN202893865U CN 201220578034 CN201220578034U CN202893865U CN 202893865 U CN202893865 U CN 202893865U CN 201220578034 CN201220578034 CN 201220578034 CN 201220578034 U CN201220578034 U CN 201220578034U CN 202893865 U CN202893865 U CN 202893865U
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- extrusion
- seamless steel
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Abstract
The utility model relates to an extrusion core rod for the hot-extrusion production of a seamless steel pipe, and the extrusion core rod forms a cylindrical shape. The extrusion core rod for the hot-extrusion production of the seamless steel pipe is characterized by being in the cylindrical shape provided with a blind hole, forming a conical shape with the contact section of a hollow billet and being provided with steps on the head section of the core rod, wherein the steps are in smoothly transition. The extrusion core rod for the hot-extrusion production of the seamless steel pipe, which is disclosed by the utility model, is used for producing the nickel-base alloy seamless steel pipe and plays a role in lowering the extrusion ratio during initial extrusion by optimizing the external structure of the extrusion core rod, thereby eliminating the transverse crack positioned on the end part of an extruded steel pipe and enhancing the quality of the head part of the extruded steel pipe and the product yield. The extrusion core rod disclosed by the utility model has the advantages of reasonability in design, simple structure, convenience for manufacture and usage and convenience for daily production and operation.
Description
Technical field
The utility model relates to the hot extrusion production equipment of metallurgy, machinery industry seamless steel pipe, refers in particular to a kind of plug for nickel-base alloy seamless steel pipe hot extrusion production.
Background technology
Seamless steel pipe is common Ferrous Metallurgy goods.
The nickel-base alloy seamless steel pipe is the high-end seamless steel pipe of developing in recent years, has the characteristics such as high temperature resistant, corrosion-resistant, resistance to deformation, is mainly used in the fields such as oil (gas) well, nuclear power station.Because the metallicity of nickel-base alloy seamless steel pipe and production technology thereof need, must adopt and wear (expansion) hole and the production of hot extrusion secondary deformation processing technology.
Hot-extrusion is the seamless steel pipe process technology that reaches its maturity in recent years, a kind of metal to be pushed more than the temperature in recrystallization, pipe is extruded from a nib, obtain the metal forming process of nib shape section tubing, have the goods dense internal organization, performance is even, does not have the characteristics such as inherent hidden danger.Hot-extrusion is particularly suitable for the processing of high alloy, difficult-to-deformation material, progressively replaces traditional hot piercing technology at present, becomes the hot rolling production method of high-end seamless steel pipe.
As shown in Figure 2, Hot Extrusion Equipment includes the extruding plug, wears device, the mechanisms such as (expansion) hole machine, extruder.Wherein pushing plug and extrusion die and form the ring-type hole, is the warp tool of determining to extrude the steel pipe internal-surface geomery.
The extruding plug is the instrument that directly determines to extrude steel pipe internal-surface shape and size quality, structure is cylindrical with blind hole, tapered with the hollow blank contact-segment, be connected with the plug supporting with the taper thread connected mode, the plug supporting is connected with the plug rear support and is fixed on the plug oil cylinder.
Pressure ram advances with same speed at work, and the type of cooling realizes the circulating water plug for cooling water is entered by extruding plug blind hole along the plug horizontal axis.At first will heat during work and send in the recipient through the hollow blank of surfaces externally and internally dusting, the extruding plug is by the center of dummy block and hollow blank, enter the nib of extrusion die, be pressurized on the hollow blank by dummy block by pressure ram again, at first compress hollow blank, make it to be full of recipient, then, under corresponding pressure, by the ring-type hole high speed extrusion steel pipe of extrusion die and extruding plug composition.
The production procedure of nickel-base alloy seamless steel pipe hot extrusion is:
After vertical line-frequency induction reheating furnace heating, and the hollow blank of the online surfaces externally and internally dusting of warp, deliver to the extruding center line together with dummy block by feeding device, the extrusion cycle of beginning steel pipe.The front end of the extrusion die sealing extrusion cylinder of glass isolator is housed; Pressure ram is pushed pressure pad, hollow blank enters recipient, until contact with glass isolator.The extruding plug is along with pressure ram moves, and pass dummy block, hollow blank enters the extrusion die nib, forms the ring-type die cavity, and applied force on the hollow blank by dummy block by pressure ram.
Then, the main plunger stroke of starting working at first compresses hollow blank, makes it jumping-up and is full of recipient, and at this moment, extruded hollow blank outside dimension is identical with the internal diameter size of recipient.Then, under corresponding pressure, the ring-type hole that hollow blank forms by extrusion die and extruding plug, high-speed extrusion goes out steel pipe.Pressure ram, extruding plug and the recipient of pressing remaining and dummy block be backhaul one segment distance together, and plug is extracted in the backhaul of plug cylinder out.Slide saw descends and cuts off the extruding clout.Pressure ram backhaul after remaining and dummy block are pressed in release; Dummy block and press more than combine at special pad tail separator and carry out after separating, dummy block recycles by the groove of sauntering, and then falls into collecting box more than the pressure.Meanwhile, the recipient liner carries out Automatic clearance and cooling; " extrusion die assembly " enters cooling, inspection, repairs or changes station with extrusion die.And begin the preparation of next extrusion cycle.
In the hot extrusion of nickel-base alloy seamless steel pipe is produced, the ring-type hole sectional area that extruding plug and extrusion die form is extrusion ratio with the ratio of hollow blank sectional area, extrusion ratio is directly determined the size of initial compression power, initial compression power during extruding is just larger, the quality of steel tube end part is just poorer, and it is lower that the defectives such as generation transversal crack cause hot extrusion to produce lumber recovery.
Just at present the hot extrusion of nickel-base alloy seamless steel pipe is produced institute and is used and push plug and hollow blank contact-segment employing column type or (tapering is less with the taper shape of certain taper, outside cylinder is near cylinder), another section reaches for the taper thread structure that is connected and installed for the step that cooperates with dummy block, and inside is a blind hole.Because its architectural feature, the extrusion ratio in hot extrusion is produced is larger, and not only initial compression power is very high, and extrudes steel tube end part section and produce the defectives such as transverse crack.
Therefore, the selected extruding plug of the hot extrusion of nickel-base alloy seamless steel pipe is implemented corresponding the improvement, suitable reduction extrusion ratio just can satisfy the needs that hot extrusion is produced, and improves lumber recovery.
The utility model content
The purpose of this utility model is a kind of extruding plug for seamless steel pipe extruding production of design, be used for the production of nickel-base alloy seamless steel pipe, by optimizing the external structure of extruding plug, the effect of the extrusion ratio when realizing reducing initial compression, thereby eliminate the steel tube end part transversal crack of extruding, improve the product lumber recovery.
The utility model is achieved through the following technical solutions its goal of the invention.
A kind of extruding plug for seamless steel pipe extruding production, cylindrical, it is characterized in that described extruding plug 4 is useful on the cylindrical of circulating water blind hole for band, order comprises:
Corresponding to the head sections 1-1 of the extruding plug 4 of the front end of extrusion die sealing extrusion cylinder,
Changeover portion 1-2,
Corresponding to the active section 1-3 of the hollow blank in the extrusion die sealing extrusion cylinder, the described hollow blank of contact, and
End segment 1-4 corresponding to the dummy block in the extrusion die sealing extrusion cylinder and plug support bar 7 coupling parts.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that the diameter of the head sections 1-1 of described extruding plug 4 is less than the diameter of the active section 1-3 of extruding plug.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that the active section 1-3 of described extruding plug 4 is conical.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that head sections 1-1 and the changeover portion between the active section 1-3 of described extruding plug 4 are the step of a rounding off.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that, described extruding plug end segment 1-4 comprise with the dummy block corresponding matching with the cylindrical segment of 2-3 step and have the taper thread structure, be used for being connected the tail end of plug support bar 7.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that the described extruding plug end segment 1-4 that is positioned at cooperates with plug support bar 7 with the size of 2-3 step of the cylindrical segment with the level of dummy block corresponding matching.
According to a kind of extruding plug for seamless steel pipe extruding production described in the utility model, it is characterized in that the step section diameter of described extruding plug end segment 1-4 and dummy block corresponding matching is maximum.
Extruding plug for seamless steel pipe extruding production of the present utility model, be used for the production of nickel-base alloy seamless steel pipe, by optimizing the external structure of extruding plug, the effect of the extrusion ratio when realizing reducing initial compression, thereby eliminate the steel tube end part transversal crack of extruding, improve the quality of extruding the steel pipe head sections and improve the product lumber recovery.
The utility model is reasonable in design, and is simple in structure, and daily production operation is convenient in making, easy to use.
Description of drawings
Fig. 1 is extrusion die bar structure figure of the present utility model.
Fig. 2 is extruding plug scheme of installation of the present utility model.
Among the figure, 1 is extrusion die, and 2 is recipient, and 3 is hollow blank, 4 are the extruding plug, and 5 is dummy block, and 6 is pressure ram, and 7 is the plug support bar, 1-1 is the head sections of extruding plug 4, and 1-2 is the changeover portion of extruding plug 4, and 1-3 is the active section of extruding plug 4, and 1-4 is the end segment of extruding plug 4.
The specific embodiment
Below in conjunction with Figure of description, with embodiment the utility model technology is done further introduction.
Embodiment 1
As shown in Figure 1, a kind of extruding plug for seamless steel pipe extruding production, cylindrical, for band is useful on the cylindrical of circulating water blind hole, comprise: corresponding to the head sections 1-1 of the extruding plug 4 of the front end of extrusion die sealing extrusion cylinder, connect head sections 1-1 changeover portion 1-2 afterwards, after the connection changeover portion 1-2, corresponding to the active section 1-3 of the hollow blank in the extrusion die sealing extrusion cylinder, the described hollow blank of contact, reach the end segment 1-4 corresponding to the dummy block in the extrusion die sealing extrusion cylinder and connection plug support bar 7.
The diameter of the head sections 1-1 of described extruding plug 4 is less than the diameter of the active section 1-3 of extruding plug, and head sections 1-1 and the changeover portion 1-2 between the active section 1-3 of described extruding plug 4 are the step of a rounding off.
Described extruding plug end segment 1-4 comprise with the dummy block corresponding matching with the cylindrical segment of 2 steps and have the taper thread structure, be used for being connected the tail end of plug support bar 7.
The step section diameter of described extruding plug end segment 1-4 and dummy block corresponding matching is maximum.
As shown in Figure 2, when pushing, be pressurized on the hollow blank 3 by dummy block 5 by pressure ram 6, at first compress hollow blank 3, make it to be full of recipient 2.Then, under corresponding pressure, extrude steel pipe by extrusion die 1 and the ring-type hole that the 1-1 section of pushing plug 4 forms, plug 4 is extruded direction along hollow blank and is moved along with pressure ram 6, through plug changeover portion 1-2, form the ring-type hole by plug 1-3 section and extrusion die subsequently metal is extruded, form standard compliant steel pipe.
Extruding plug for seamless steel pipe extruding production of the present utility model, be used for the production of nickel-base alloy seamless steel pipe, by optimizing the external structure of extruding plug, the effect of the extrusion ratio when realizing reducing initial compression, thereby eliminate the steel tube end part transversal crack of extruding, improve the quality of extruding the steel pipe head sections and improve the product lumber recovery.
The utility model is reasonable in design, and is simple in structure, and daily production operation is convenient in making, easy to use.
Claims (7)
1. one kind is used for the extruding plug that the seamless steel pipe extruding is produced, cylindrical, it is characterized in that, described extruding plug (4) is useful on the cylindrical of circulating water blind hole for band, and order comprises:
Corresponding to the head sections (1-1) of the extruding plug (4) of extrusion die sealing extrusion cylinder front end,
Changeover portion (1-2),
Corresponding to the active section (1-3) of the hollow blank in the extrusion die sealing extrusion cylinder, the described hollow blank of contact, and
End segment (1-4) corresponding to the dummy block in the extrusion die sealing extrusion cylinder and plug support bar (7) coupling part.
2. a kind of extruding plug for seamless steel pipe extruding production as claimed in claim 1 is characterized in that the diameter of the head sections (1-1) of described extruding plug (4) is less than the diameter of the active section (1-3) of extruding plug.
3. a kind of extruding plug for seamless steel pipe extruding production as claimed in claim 1 is characterized in that the active section (1-3) of described extruding plug (4) is conical.
4. a kind of extruding plug for seamless steel pipe extruding production as claimed in claim 1 is characterized in that the head sections (1-1) of described extruding plug (4) and the changeover portion (1-2) between the active section (1-3) are the step of a rounding off.
5. a kind of extruding plug of producing for seamless steel pipe extruding as claimed in claim 4, it is characterized in that, described extruding plug end segment (1-4) comprise with the dummy block corresponding matching with the cylindrical segment of 2-3 step and have the taper thread structure, be used for being connected the tail end of plug support bar (7).
6. a kind of extruding plug of producing for seamless steel pipe extruding as claimed in claim 5, it is characterized in that, describedly be positioned at extruding plug end segment (1-4), cooperate with plug support bar (7) with the size of 2-3 step of the cylindrical segment with the level of dummy block corresponding matching.
7. a kind of extruding plug for seamless steel pipe extruding production as claimed in claim 5 is characterized in that described extruding plug end segment (1-4) is maximum with the step section diameter of dummy block corresponding matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578034 CN202893865U (en) | 2012-11-05 | 2012-11-05 | Extrusion core rod for hot-extrusion production of seamless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578034 CN202893865U (en) | 2012-11-05 | 2012-11-05 | Extrusion core rod for hot-extrusion production of seamless steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN202893865U true CN202893865U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220578034 Expired - Fee Related CN202893865U (en) | 2012-11-05 | 2012-11-05 | Extrusion core rod for hot-extrusion production of seamless steel pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971254A (en) * | 2018-07-11 | 2018-12-11 | 西南铝业（集团）有限责任公司 | A kind of squeezing needle and pressing method for seamless tubular goods |
| CN109909311A (en) * | 2017-12-12 | 2019-06-21 | 宝钢特钢有限公司 | A kind of tubing hot extrusion discard and tube body separation method |
| CN112170520A (en) * | 2020-09-16 | 2021-01-05 | 邯郸新兴特种管材有限公司 | Production method and production system of 110-steel-grade super dual-phase steel seamless steel pipe |
| CN115106394A (en) * | 2021-03-22 | 2022-09-27 | 宝武特种冶金有限公司 | High-temperature extrusion pipe manufacturing method for pipe fitting for pressure container |
-
2012
- 2012-11-05 CN CN 201220578034 patent/CN202893865U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109909311A (en) * | 2017-12-12 | 2019-06-21 | 宝钢特钢有限公司 | A kind of tubing hot extrusion discard and tube body separation method |
| CN109909311B (en) * | 2017-12-12 | 2020-05-12 | 宝钢特钢有限公司 | Method for separating pipe hot extrusion residue from pipe body |
| CN108971254A (en) * | 2018-07-11 | 2018-12-11 | 西南铝业（集团）有限责任公司 | A kind of squeezing needle and pressing method for seamless tubular goods |
| CN112170520A (en) * | 2020-09-16 | 2021-01-05 | 邯郸新兴特种管材有限公司 | Production method and production system of 110-steel-grade super dual-phase steel seamless steel pipe |
| CN115106394A (en) * | 2021-03-22 | 2022-09-27 | 宝武特种冶金有限公司 | High-temperature extrusion pipe manufacturing method for pipe fitting for pressure container |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOSTEEL SPECIAL STEEL CO., LTD. Free format text: FORMER OWNER: BAOSTEEL SPECIAL MATERIAL CO., LTD. Effective date: 20140124 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140124 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIAL STEEL Co.,Ltd. Address before: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee before: BAOSTEEL SPECIAL MATERIAL Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20211105 |