CN204320943U - A kind of spiral steel pipe bottlenecking rounding die - Google Patents
A kind of spiral steel pipe bottlenecking rounding die Download PDFInfo
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- CN204320943U CN204320943U CN201420748424.1U CN201420748424U CN204320943U CN 204320943 U CN204320943 U CN 204320943U CN 201420748424 U CN201420748424 U CN 201420748424U CN 204320943 U CN204320943 U CN 204320943U
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Abstract
The utility model relates to a kind of spiral steel pipe bottlenecking rounding die, comprises upper die and lower die, and the semicircle inner chamber of described upper die and lower die has gradient in the axial direction, and matched moulds rear interior cavity body is truncated cone shape.Described upper die and lower die respectively remove 7 ~ 10mm on the surface at matched moulds place, namely leave 14 ~ 20mm gap between upper and lower mould after matched moulds.The gradient of the semicircle inner chamber of described upper die and lower die is
in formula: D-standard specification steel pipe theoretical diameter; B-die width.Described die width B is 200 ~ 300mm.Compared with prior art, the beneficial effects of the utility model are: 1) adopt cold reducing method, utilize forcing press to complete the operation of pipe end undergauge full circle, rapidly and efficiently; 2) rounding off between undergauge pipe end and steel pipe body diameter, is conducive to ensureing steel tube surface quality; 3) make full use of full circle position press, carry out undergauge process at last full circle station, do not affect normal production.
Description
Technical field
The utility model relates to pipe end dressing technique field, particularly relates to the expanding rounding die of a kind of spiral steel pipe pipe end.
Background technology
In oil and gas long distance pipeline construction, for convenience of pipe end counterpart assembly welding, need ensure to dock diameter dimension within the scope of the pipe end certain length of steel pipe both sides with ovality close to consistent, and tolerance is comparatively strict.To dimensional accuracy be ensured through pipe end finishing process and eliminate internal stress in the production process of therefore spiral steel pipe; but in spiral steel pipe actual production; the factors such as inaccurate are estimated in fluctuation due to steel plate mechanical performance, the impact on factors such as resiliences, usually there will be the phenomenon that tube end diameter is overproof.
Expanding process can be implemented to pipe end when pipe end diameter is less than normal, and normally take the way of excising pipe end to process for the steel pipe that tube end diameter is bigger than normal.But for oil and gas long distance pipeline, steel pipe length also has strict demand, the steel pipe after pipe end excision does not often reach delivery length requirement, and pipe end excision method reduces delivery clearing weight in addition, has a strong impact on Business Economic Benefit.
Application number is that the Chinese patent of 201320391619.0 (applying date is on July 2nd, 2013) discloses one " pipe ends hot stem reducing mould ", its die ontology " has a cylindrical interior volume; axially comprise introduction segment, deformation section and smooth section successively along described cylindrical interior volume; the tapering of described introduction segment inner surface is arranged between 40-60 degree; before the tapering of described deformation section inner surface is arranged on 1.5-2.5 degree, the tapering of described smooth section of inner surface is set to 0 degree." this mould is hot stem reducing mould, need to heat pipe end, add frock and input, its tapering is subsection setup in addition, and the transition of steel pipe undergauge is not round and smooth, and easy Surface Quality has a negative impact.
Utility model content
The utility model provides a kind of spiral steel pipe bottlenecking rounding die, adopt cold reducing method, usual pressure equipment just can complete fast, and take into full account the rounding off between pipe end and steel pipe body diameter, after undergauge, pipe end diameter and circularity all can reach standard-required.
In order to achieve the above object, the utility model realizes by the following technical solutions:
A kind of spiral steel pipe bottlenecking rounding die, comprise mold and bed die, the semicircle inner chamber of described mold and bed die has gradient in the axial direction, and matched moulds rear interior cavity body is truncated cone shape.
Described mold and bed die respectively remove 7 ~ 10mm on the surface at matched moulds place, namely leave 14 ~ 20mm gap between upper and lower mould after matched moulds.
The gradient of described mold and the semicircle inner chamber of bed die is
in formula: D-standard specification steel pipe theoretical diameter; B-die width.
Described die width B is 200 ~ 300mm.
Compared with prior art, the beneficial effects of the utility model are:
1) adopt cold reducing method, utilize forcing press to complete the operation of pipe end undergauge full circle, rapidly and efficiently;
2) rounding off between undergauge pipe end and steel pipe body diameter, is conducive to ensureing steel tube surface quality;
3) make full use of full circle position press, steel pipe on inspection overproof of tube end diameter moves ahead by normal process flow after need marking, and carries out undergauge process, do not affect normal production at last full circle station.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
In figure: 1 mold 2. bed die
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
See Fig. 1-Fig. 2, be structural representation of the present utility model, a kind of spiral steel pipe bottlenecking of the utility model rounding die, comprises mold 1 and bed die 2, the semicircle inner chamber of described mold 1 and bed die 2 has gradient in the axial direction, and matched moulds rear interior cavity body is truncated cone shape.Do not draw the gusset and bolt hole installed in figure, its mounting means is identical with common die.
Described mold 1 and bed die 2 respectively remove 7 ~ 10mm on the surface at matched moulds place, namely leave 14 ~ 20mm gap between upper and lower mould after matched moulds.
The gradient of described mold 1 and the semicircle inner chamber of bed die 2 is
in formula: D-standard specification steel pipe theoretical diameter; B-die width.
Described die width B is 200 ~ 300mm.
The operation principle of a kind of spiral steel pipe bottlenecking of the utility model rounding die is, by standard specification steel pipe theoretical diameter and diameter reducing rate designing mould inner chamber, adopt forcing press will exert pressure to spiral steel pipe pipe end, make its tube end diameter precision and circularity reach standard-required.
The using method of a kind of spiral steel pipe of the utility model bottlenecking rounding die is as follows:
According to standard pipe end theoretical diameter and theoretical diameter reducing rate processing and fabricating mould, mould is arranged on forcing press; To undergauge steel tube suspending be needed to be put on Frame for supporting parallel pipes, adjustment Frame for supporting parallel pipes makes steel pipe undergauge end and mould aligning; Undergauge operation is carried out in the pressurization of starting pressure machine, measures diameter of steel tube and circularity, reach standard-required be qualified.
By standard A PI SPECIFICATION 5L " pipeline steel tube specification " (the 45th edition) requirement, the tolerance of pipe end diameter is D ± 1.6, and be qualified steel pipe within the scope of this, overproof is substandard product; Simultaneously according to API standard: " except as otherwise outside agreement, the sizing rate of cold expanding steel pipe should not be less than 0.003 and should not be greater than 0.015 8.9.2.8.9.3 except as otherwise outside agreement, sizing rate Sr should adopt formula (1) to calculate:
Sr=|Da-Db|/Db ... formula (1)
Da refers to external diameter after the sizing that manufacturer specifies, and represents with mm (in);
Db refers to external diameter before the sizing that manufacturer specifies, and represents with mm (in);
| Da-Db| refers to the absolute value of external diameter difference, represents with mm (in); "
The utility model setting steel pipe diameter reducing rate is in 0.3% ~ 1.5% scope, diameter reducing rate is the ratio of diameter sinking and diameter of steel tube, i.e. (D1-D)/D1=(0.003 ~ 0.015), in formula, D is standard specification steel pipe theoretical diameter, and D1 is the diameter of steel tube before undergauge; Stem reducing mould inner chamber gradient K=(D1-D)/2B, in formula, B is die width, show that dies cavity gradient is through converting
Collide in order to avoid upper/lower die during undergauge and cause device damage, certain interval must be left between upper/lower die, if this gap is too large, indent phenomenon is easily there is when thin-wall steel tube undergauge is compressed, therefore be set between 14 ~ 20mm, respectively process removal 7 ~ 10mm by mold 1 and bed die 2 apparent surface.
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1] specification is the undergauge operation of the spiral steel pipe of D630 × 8
Make mould: D630 × 8 standard specification steel pipe theoretical diameter is 630mm, setting die width B=200mm, coefficient is taken as 0.005, then dies cavity gradient
namely larger diameter end is of a size of 636.4mm, and smaller diameter end is of a size of 630mm, and theoretical diameter reducing rate is 1%, meets the requirements.
In the present embodiment, the tolerance of pipe end diameter is D ± 1.6, namely tube end diameter is qualified within the scope of (631.6 ~ 628.4) mm, undergauge steel pipe measured diameter is needed to be 633.7mm, after measurement steel pipe undergauge, outside dimension is 630.2mm, actual diameter reducing rate is 0.5%, reaches product standard requirement.
Claims (4)
1. a spiral steel pipe bottlenecking rounding die, is characterized in that, comprises mold and bed die, and the semicircle inner chamber of described mold and bed die has gradient in the axial direction, and matched moulds rear interior cavity body is truncated cone shape.
2. a kind of spiral steel pipe bottlenecking rounding die according to claim 1, it is characterized in that, described mold and bed die respectively remove 7 ~ 10mm on the surface at matched moulds place, namely leave 14 ~ 20mm gap between upper and lower mould after matched moulds.
3. a kind of spiral steel pipe bottlenecking rounding die according to claim 1, is characterized in that, the gradient of described mold and the semicircle inner chamber of bed die is
in formula: D-standard specification steel pipe theoretical diameter; B-die width.
4. a kind of spiral steel pipe bottlenecking rounding die according to claim 3, it is characterized in that, described die width B is 200 ~ 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748424.1U CN204320943U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe bottlenecking rounding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748424.1U CN204320943U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe bottlenecking rounding die |
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| CN204320943U true CN204320943U (en) | 2015-05-13 |
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| CN201420748424.1U Active CN204320943U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe bottlenecking rounding die |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195625A (en) * | 2015-11-02 | 2015-12-30 | 河南光大管业有限公司 | Necking tee joint processing die and method of processing tee joint by using same |
| CN108031764A (en) * | 2017-12-08 | 2018-05-15 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of pipe end precision diameter shrinkage and rounding device and method |
| CN110116166A (en) * | 2019-04-28 | 2019-08-13 | 上海尊马汽车管件股份有限公司 | Motor petrol fuel distribution system round tube full circle, straightening die set |
| CN110961864A (en) * | 2019-11-19 | 2020-04-07 | 中国航发贵州黎阳航空动力有限公司 | Forming processing method for oil inlet and oil delivery pipe of aircraft engine |
| CN113351811A (en) * | 2021-05-12 | 2021-09-07 | 苏州市东盛锻造有限公司 | Annular forging processing method based on numerical control automatic hydraulic ring rolling mill |
-
2014
- 2014-12-03 CN CN201420748424.1U patent/CN204320943U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195625A (en) * | 2015-11-02 | 2015-12-30 | 河南光大管业有限公司 | Necking tee joint processing die and method of processing tee joint by using same |
| CN108031764A (en) * | 2017-12-08 | 2018-05-15 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of pipe end precision diameter shrinkage and rounding device and method |
| CN110116166A (en) * | 2019-04-28 | 2019-08-13 | 上海尊马汽车管件股份有限公司 | Motor petrol fuel distribution system round tube full circle, straightening die set |
| CN110116166B (en) * | 2019-04-28 | 2021-04-30 | 上海尊马汽车管件股份有限公司 | Mould for rounding and straightening round pipe of automobile gasoline and fuel distribution system after flattening |
| CN110961864A (en) * | 2019-11-19 | 2020-04-07 | 中国航发贵州黎阳航空动力有限公司 | Forming processing method for oil inlet and oil delivery pipe of aircraft engine |
| CN113351811A (en) * | 2021-05-12 | 2021-09-07 | 苏州市东盛锻造有限公司 | Annular forging processing method based on numerical control automatic hydraulic ring rolling mill |
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