CN2855577Y - Pipe-expanding die used for steel pipe expander - Google Patents
Pipe-expanding die used for steel pipe expander Download PDFInfo
- Publication number
- CN2855577Y CN2855577Y CN 200520112897 CN200520112897U CN2855577Y CN 2855577 Y CN2855577 Y CN 2855577Y CN 200520112897 CN200520112897 CN 200520112897 CN 200520112897 U CN200520112897 U CN 200520112897U CN 2855577 Y CN2855577 Y CN 2855577Y
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- pipe
- die
- expander
- cone
- expanding die
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Abstract
The utility model provides a tube-expanding die of a steel tube expander which is used to expand the caliber of heavy-caliber steel tube blank and can remove the pointed parts of a steel tube in the mechanical heavy-caliber steel tube expanding process. The tube-expanding die used in the steel tube expander is applied to expand the caliber of and size the heavy-caliber steel tube blank. The steel tube expander consists of a pull rod, a cone, retaining rings and a tube-expanding die. The cone is embedded into the outer circle of the pull rod. The tube-expanding die is freely arranged on the outer circle of the cone and the retaining rings are arranged at both axial ends of the cone. The combined modules forming the tube-expanding die at least comprises a surface side part molded by crystal thermoplastic resin and contacted with the inner surface of the heavy-caliber steel tube-expanding die and a support side part contacted with the cone of the steel tube expander. As a result, the die is lightened, the die production-exchange operation time is shortened, the application size scope of the die is enlarged and the tenure quantity of the die is also reduced.
Description
Technical field
The present invention relates to be used for expanding die to the steel pipe pipe expander of the effective pipe hole enlargement of large-diameter steel.
Background technology
The residual stress that is had when extruding or the welding by the pipe of UO tubulation is removed in steel pipe pipe expander performance, and with the effect of final size shaping.The steel pipe pipe expander has and can enlarge the expanding die dwindle to radial direction, inserts an end of pipe from an end, and expander on one side then is Yi Bian move its other end to pipe successively.
Expanding die in the past, by constituting in a plurality of die segments that are divided into of circumferencial direction (dies segment), these die segments are all by the tool steel manufacturing.But the expanding die that constitutes by this tool steel,
Has following problem.
1. manufacturing cost is very high.
2. Production Time is long.
3. because mold weight is big, therefore needing jacking equipment (crane), mould to change product adjustment operation needs long-time.
4. take place mould rhegma, come off.
5. clamp-on pressing of foreign matter, welding bead etc. during because of expander, adhere to flaw at the pipe inner face.
In addition, if use in the past the expanding die that constitutes by tool steel, also there is the problem that produces moulding mark (corner angle).When expander die, between the die segment of adjacency, produce gap (gap).Between this gap, do not support the pipe inner face, the linearity distortion.As a result, the pipe inner face behind the expander, microcosmic is seen the formation polygon.In addition, because the side edge part of die segment is a rigid body, so, on the part that is connected with die segment and unconnected part, produce significantly disconnected slope at the pipe inner face.Especially, along with the increase that die face is pressed, this tendency is more remarkable.So, produce moulding mark.
In order to prevent so moulding mark, open in the clear 57-41836 communique the spy, proposed in the concavo-convex apperance of mould surface attachment, by adjusting the frictional force of mould surface and pipe inner face, the slip homogenising when making expander.But, in this mould, exist in the problem of the concavo-convex apperance of pipe surface transfer, in addition, the problem of also still remaining ovality, moulding mark.
Open in the flat 4-71737 communique the spy,, proposed the best ratio of mould footpath and pipe internal diameter for reducing moulding mark.But, must all prepare mould by each caliber, in addition, can not remove moulding mark fully.
Open in the clear 62-244529 communique the spy, propose when the bending machining straight tube, to insert resinous core, prevent the ovalizing deflection of sweep at sweep.But this resinous core can not be used to bear the mould of high compression forces.
Summary of the invention
The purpose of this invention is to provide a kind of steel pipe pipe expander expanding die, promptly provide, make each die segment have elasticity, and prevent the steel pipe pipe expander expanding die of the generation of moulding mark by the material of expanding die is changed to synthetic resin from the past tool steel.
Steel pipe pipe expander expanding die of the present invention, utilize hole enlargement expanding die freely, the effective pipe of large-diameter steel is carried out enlarging, shaping, it is characterized in that: described steel pipe pipe expander is by pull bar, cone, retaining ring, expanding die constitutes, on the periphery of pull bar, embed cone is arranged, expanding die is installed on the periphery of cone sliding freely, at axial two ends retaining ring is installed, the composite module that constitutes described expanding die at least by the inner face with the effective pipe of large-diameter steel contact by crystallinity thermoplastic resin shaped surface side part, the support sector's side that contacts with cone with the steel pipe pipe expander partly constitutes.Thus, address the above problem.
In the preferred described die segment, support sector's side part of using the crystallinity thermoplastic resin to be shaped and to contact with the cone of described steel pipe pipe expander.
Preferably in described die segment, the support sector's side part that is shaped and contacts with steel with the cone of described steel pipe pipe expander.
Preferred described die segment is, is the face side part that ester moulding contacts with the pipe inner face with phenolic aldehyde, and the support sector's side part that contacts with the cone of described steel pipe pipe expander with polyamide-based ester moulding.
Preferably, the outer diameter D 1 of expanding die and the ratio (D1/D2) of the bore D2 behind the expander are set in more than 1.00.
In expanding die of the present invention,,, the pipe surface is not produced rapid disconnected slope so side edge part is out of shape slidably because each die segment has elasticity.Its result, the degree of corner angle also reduces.
In the present invention, adopt the crystallinity thermoplastic resin.This resin has elasticity, the withstand voltage intensity height that contracts.Do not have so resin in the past, but develop in recent years, commercially available.
By die segment is defined as resin system, can obtain following advantage.
1. high-compressibility
By making pipe plastic deformation, the compression stress big when the expander to the die segment effect.Die segment can be resisted this compression stress.
2. high resiliency
Occur at the pipe inner face under the situation of little projection such as foreign matter, welding bead, concentrate the effect compression stress herein.Even under situation so, die segment is strain also, die segment does not crack.In addition, by the side edge part strain, as mentioned above, do not produce moulding mark.
3. easy toolability
If the repeated use mould will produce flaw on the surface of die segment, also wear and tear.In such cases, need to repair mould or replacing.Resin is easy to generate flaw, but processing easily.By cutting or built-up welding etc., repair the bad part of die segment easily.
4. low-gravity
In general, the proportion of steel is 7.8, and the proportion of resin is 1.2, and the proportion of steel approximately is 6.5 times of resin.When mould is replaced, because the resin molding is light, so can carry out operation safety quickly.
5. ovality
Since make die segment have elasticity, thus the side edge part of die segment is contacted with the pipe inner face, then, while the side edge part strain is pressurizeed.So, die segment closely contacts with pipe, keeps the circular arc near proper circle.Therefore, preferably the bore D2 behind the expander is defined in more than 1 with the ratio (D1/D2) of the outer diameter D 1 of expanding die.
Description of drawings
Fig. 1 is the profilograph of steel pipe pipe expander.
Fig. 2 is the drawing in side sectional elevation of the steel pipe pipe expander of Fig. 1.
Fig. 3 is the drawing in side sectional elevation of die segment, represents various structures.
Fig. 4 is the curve map of the corner angle of expression steel pipe inner face.
Fig. 5 is that the mould of expression steel pipe pipe expander changes the curve map that produces the adjustment activity duration.
Among the figure: 1-steel pipe pipe expander, 2-pipe, 3-expanding die, 11-pull bar, 12-cone (cone), 14-retainingf key (tablekey), 31-die segment, 311-face side part, 312-support sector side part.
The specific embodiment
(embodiment)
With reference to Fig. 1～5, the embodiment of steel pipe pipe expander of the present invention with expanding die is described.
At first, with reference to Fig. 1, Fig. 2, the steel pipe pipe expander used to expanding die of the present invention describes.Steel pipe pipe expander 1 carries out enlarging, shaping by hole enlargement expanding die 3 freely to the effective pipe 2 of large-diameter steel.Steel pipe pipe expander 1 is made of pull bar 11, cone 12, retaining ring 13, expanding die 3.
On the periphery of pull bar 11, embed cone 12, expanding die 3 is installed on the periphery of cone 12 sliding freely, retaining ring 13 is installed at axial two ends.In the inboard of retaining ring 13 retainingf key 14 is set, is used to make the scalable effect of expanding die 3 to be maintained fixed.
As shown in Figure 2, expanding die 3 is by divide a plurality of die segments that are slit into 31 to constitute at circumferencial direction.
Direction by arrow in Fig. 1 15 (towards left to) draw pull bar 11, with pull bar 11-with the cone 12 that is moved to the left the band tapering, to Fig. 1, arrow shown in Figure 2 32 direction hole enlargement die segments 31.Thus, the effective pipe 2 of enlarging large-diameter steel.So, the residual stress that takes place when the extruding of the pipe 2 of steel pipe pipe expander 1 removal UO tubulation or welding sequence is simultaneously by the final size shaping.
Expanding die 3 of the present invention, as shown in Figure 3, can be by following any formation, that is: with crystallinity thermoplastic resin each die segment (dies segment) 31 (A) that are shaped; The face side part 311 that is shaped and contacts with the crystallinity thermoplastic resin with the inner face of pipe 2, the support sector's side part 312 (B) that contacts with the cone 13 of steel pipe pipe expander 1 with the steel shaping; With polyamide-based ester moulding side part 312 (C) of support sector.
Crystallinity thermoplastic resin (polyamide-based resin, phenolic aldehyde are resin etc.) has elasticity, the withstand voltage intensity height that contracts.This characteristic is fit to die segment 31 of the present invention very much.
Support sector's side part 312 of the die segment 31 that contacts with cone 12 is considered from aspects such as lubricity, the coefficient of waste, durability, preferably is defined as steel.
Consider the wearing and tearing of die segment 31, be preferably formed multi-layer resinously, cover outermost layer with high-intensity resin.For example, shown in Fig. 3 (C), also can be with polyamide-based resin as body, the phenolic aldehyde of the about 3mm of cladding thickness is a resin thereon.
Preferably the outer diameter D 1 of expanding die and the ratio (D1/D2) of the bore D2 behind the expander are set in more than 1.00.
Below, specific embodiment of the present invention is described.
With polyamide-based resin manufacture die segment 31, set D1/D2=1.15.External diameter 760mm (30in), the thickness 6.35mm of expander pipe 2, material STPY400 (JISG3457).Distance (peak-to-peak) is the degree of eccentricity of 0.6mm between maximum peak.In mould in the past, be 0.8～2.0mm.At the pipe inner face flaw does not take place, surface texture is fabulous.
In addition, on polyamide-based resinous die segment 31, covering the thick phenolic aldehyde of 3mm is resin.Aspect the surface blemish of the die segment after use, the wear extent, compare, roughly reduce half with polyamide-based resinous die segment 31.As a result, roughly prolong 2 times die life.
Polyamide-based resinous die segment, the wearing and tearing that in use produce the two ends side edge part are not even but D1/D2=0.95 can have especially big processing prejudicially yet.According to the goods precision prescribed, even the wearing and tearing mould also can use.
For relatively, below represent to adopt the result of the mould and the expander pipe that adopts polyamide-based resinous mould of the present invention of tool steel (SKD-11) system in the past.
At first, table 1 illustrates the mechanical performance of the mould of use.
Table 1
| The SKD-11 molding jig | Polyamide-based resin molding jig | |
| Tensile strength (kg/cm 2) | 7000 | 800-980 |
| Percentage elongation (%) | 5～26 | 10-50 |
| Tensile modulus of elasticity (kg/cm 2) | 2×10 6 | 3-3.5×10 4 |
In the SKD-11 molding jig, because very difficult strain, so at the residual moulding mark of pipe inner face.As a result, form polygon.Adopt polyamide-based resin molding jig of the present invention, not residual moulding mark, can be roughly expander glossily.
Fig. 4 represents the corner angle of the pipe inner face behind the expander.The situation of mould is in the past adopted in Fig. 4 (A) expression, and the situation of mould of the present invention is adopted in Fig. 4 (B) expression.
Under the situation that adopts mould in the past, in order to revise corner angle, by with the width of die segment only half carries out expander 2 times, thereby reduces corner angle to the rotation of pipe circumferencial direction.Like this, need 2 times of times of common expander time, production efficiency reduces.
Fig. 5 represents that mould changes the comparative result that produces the adjustment activity duration.In mould of the present invention, compare with mould in the past, because the activity duration so do not need jacking equipment, can be shortened in approximately lightweight to 6.5/1.
According to the present invention, owing to use the ester moulding die segment, so have elasticity, can not produce moulding mark and diversification at the pipe inner face, in addition, because can lightweight, therefore can carry out die change at short notice, in addition, can cut down and possess the mould number with D1/D2 using on a large scale.
Claims (5)
1. a steel pipe pipe expander expanding die utilizes hole enlargement expanding die freely, and the effective pipe of large-diameter steel is carried out enlarging, shaping, it is characterized in that:
Described steel pipe pipe expander is made of pull bar, cone, retaining ring, expanding die, and embedding on the periphery of pull bar has cone, and expanding die is installed on the periphery of cone sliding freely, at axial two ends retaining ring is installed,
The composite module that constitutes described expanding die partly is made of the support sector's side that is contacted with cone with the steel pipe pipe expander by crystallinity thermoplastic resin shaped surface side part that the inner face with the effective pipe of large-diameter steel contacts at least.
2. steel pipe pipe expander expanding die as claimed in claim 1 is characterized in that: with the crystallinity thermoplastic resin described support sector side part that is shaped.
3. steel pipe pipe expander expanding die as claimed in claim 1 is characterized in that: in described die segment, and the support sector's side part that is shaped and contacts with steel with the cone of described steel pipe pipe expander.
4. steel pipe pipe expander expanding die as claimed in claim 1, it is characterized in that: described die segment is, with phenolic aldehyde is the face side part that ester moulding contacts with the pipe inner face, and the support sector's side part that contacts with the cone of described steel pipe pipe expander with polyamide-based ester moulding.
5. as any one described steel pipe pipe expander expanding die in the claim 1～4, it is characterized in that: the outer diameter D 1 of expanding die and the ratio (D1/D2) of the bore D2 behind the expander are set in more than 1.00.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520112897 CN2855577Y (en) | 2005-08-10 | 2005-08-10 | Pipe-expanding die used for steel pipe expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520112897 CN2855577Y (en) | 2005-08-10 | 2005-08-10 | Pipe-expanding die used for steel pipe expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2855577Y true CN2855577Y (en) | 2007-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520112897 Expired - Lifetime CN2855577Y (en) | 2005-08-10 | 2005-08-10 | Pipe-expanding die used for steel pipe expander |
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|---|---|
| CN (1) | CN2855577Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248033A (en) * | 2011-06-30 | 2011-11-23 | 江苏华阳管业股份有限公司 | Bend flaring die |
| CN102423784A (en) * | 2011-11-08 | 2012-04-25 | 哈尔滨工程大学 | Elastic medium-based expanding device and method for shape memory alloy pipe joint |
| CN102489597A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Hot bulging method for rectangular bearing steel rolled ring |
| CN102489598A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Thermal bulging process for special-shaped bearing steel rolled ring workpieces |
| CN102489593A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Hot bulge forming method for aluminum-alloy flash buttwelding ring components |
| WO2015032227A1 (en) * | 2013-09-05 | 2015-03-12 | 无锡双友石化机械有限公司 | Single module positioning and guiding mechanism |
| CN106536079A (en) * | 2014-07-18 | 2017-03-22 | 杰富意钢铁株式会社 | Pipe expander |
| CN110892185A (en) * | 2017-06-16 | 2020-03-17 | 房卍爀 | Composite pipe comprising stainless steel pipe, steel pipe and corrosion-resistant layer, and method for producing same |
| US10940521B2 (en) | 2017-06-29 | 2021-03-09 | Milwaukee Electric Tool Corporation | Swage tool |
-
2005
- 2005-08-10 CN CN 200520112897 patent/CN2855577Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248033A (en) * | 2011-06-30 | 2011-11-23 | 江苏华阳管业股份有限公司 | Bend flaring die |
| CN102423784A (en) * | 2011-11-08 | 2012-04-25 | 哈尔滨工程大学 | Elastic medium-based expanding device and method for shape memory alloy pipe joint |
| CN102489597A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Hot bulging method for rectangular bearing steel rolled ring |
| CN102489598A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Thermal bulging process for special-shaped bearing steel rolled ring workpieces |
| CN102489593A (en) * | 2011-11-24 | 2012-06-13 | 贵州安大航空锻造有限责任公司 | Hot bulge forming method for aluminum-alloy flash buttwelding ring components |
| CN102489598B (en) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | Thermal bulging process for special-shaped bearing steel rolled ring workpieces |
| CN102489597B (en) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | Hot bulging method for rectangular bearing steel rolled ring |
| CN102489593B (en) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | Hot bulge forming method for aluminum-alloy flash buttwelding ring components |
| WO2015032227A1 (en) * | 2013-09-05 | 2015-03-12 | 无锡双友石化机械有限公司 | Single module positioning and guiding mechanism |
| CN106536079A (en) * | 2014-07-18 | 2017-03-22 | 杰富意钢铁株式会社 | Pipe expander |
| CN110892185A (en) * | 2017-06-16 | 2020-03-17 | 房卍爀 | Composite pipe comprising stainless steel pipe, steel pipe and corrosion-resistant layer, and method for producing same |
| US10940521B2 (en) | 2017-06-29 | 2021-03-09 | Milwaukee Electric Tool Corporation | Swage tool |
| US11717876B2 (en) | 2017-06-29 | 2023-08-08 | Milwaukee Electric Tool Corporation | Swage tool |
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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: NIPPON STEEL + SUMITOMO METAL CORPORATION Free format text: FORMER OWNER: CHUGAI SEIYAKU KABUSHIKI KAISHA Effective date: 20130327 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130327 Address after: Tokyo, Japan Patentee after: Nippon Steel Corporation Address before: Osaka Japan Patentee before: Sumitomo Metal Industries Ltd. |
|
| CX01 | Expiry of patent term |
Expiration termination date: 20150810 Granted publication date: 20070110 |
|
| EXPY | Termination of patent right or utility model |