CN2551367Y - Mandrel for roll piercing large expanding - Google Patents
Mandrel for roll piercing large expanding Download PDFInfo
- Publication number
- CN2551367Y CN2551367Y CN 02216450 CN02216450U CN2551367Y CN 2551367 Y CN2551367 Y CN 2551367Y CN 02216450 CN02216450 CN 02216450 CN 02216450 U CN02216450 U CN 02216450U CN 2551367 Y CN2551367 Y CN 2551367Y
- Authority
- CN
- China
- Prior art keywords
- stabber
- bodkin
- roll
- rolling
- degrees
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The utility model relates to a plug for largely expanding hole diameter of rotary piercing, and can meet that the rotary piercing with diameter expanding ratio achieving more than 20 percent for obtaining a larger and steady pierced shell outer diameter, at the same time, the current load of piercing mill should be controlled into the allowed ranged of the piercing equipment, the structure of the plug comprises a bodkin and a rolling-off stabber, and the rolling-off stabber has a rolling-off stabber angle Beta; unsmooth transition is adopted between the bodkin and the rolling-off stabber, a bodkin angle Alfa is formed between the bodkin and the rolling-off stabber, and Alfa is unequal to Beta; the range of the bodkin angle Alfa is 2.0 degrees to 5.0 degrees; the clearance along the rolling-off direction between the rolling-off stabber and an outlet stabber of the bodkin roller is different; when the outlet stabber angle of a punching roller is 2.5 degrees to 4.75 degrees, the range of the rolling-off stabber angle Beta is 4.5 degrees to 7.5 degrees. When the plug of the utility model is adopted, and when the diameter expanding ratio is more than 20 percent, the punching radius is not affected by the rolling-off stabber angle and the length of the bodkin, the current overload is prevented, and the outer diameter requirement of hollow billet for largely expanding diameter is realized.
Description
Technical field
The top that the big hole enlargement of roll piercing was used when the utility model related to a kind of seamless steel tube production.
Background technology
In the prior art, the top that general piercing mill of seamless steel tube adopts is made up of bodkin and roll off awl, both junctions are for seamlessly transitting, and as shown in Figure 1, and the roll off of top awl and perforating roller go out between the prostomum spatially, and the gap equates, the roll off awl has a roll off cone angle beta, is generally 3.5 °.The outlet cone angle that goes out prostomum when perforating roller is during at 6.0 °～7.75 °, above-mentioned top structure shape, when Mannesmann piercing mill carries out big hole enlargement and produces, though can produce the hollow billet that meets the external diameter requirement, but, block or contain the top phenomenon after in rolling, easily taking place because the gap between hollow billet and the top is less; When perforating roller outlet cone angle hour, above-mentioned existing top shape when Mannesmann piercing mill carries out big hole enlargement and produces, easily causes the punch current capacity higher, normally the carrying out of influence perforation.Especially reach 20% and the above big hole enlargement of roll piercing when producing at enlarging rate, existing top shape can't realize big enlarging rate like this, and the punch current capacity current loading specified far above punch.Therefore existing top shape can not be suitable for.
Summary of the invention
The top that the purpose of this utility model adopts when being to provide the big hole enlargement of a kind of Mannesmann piercing mill, satisfy enlarging rate reach 20% and the above big hole enlargement of roll piercing obtain big stable perforation capillary outer diameter, and the current capacity of punch also is controlled in the scope of perforating apparatus permission.
For achieving the above object, the top structure that the utility model provides comprises bodkin, roll off awl, and described roll off awl has a roll off cone angle beta; Adopt unsmooth transition between described bodkin and the roll off awl,, reduce the perforation resistance to reduce rolling load; One perforation cone angle is arranged between bodkin and the roll off awl, and described perforation cone angle is not equal to roll off cone angle beta, i.e. α ≠ β.
The scope of described perforation cone angle is 2.0 °～5.0 °.
Further, top roll off awl and going out between the prostomum of perforating roller do not wait along rolling direction gap 4, spatially are the trend that reduces gradually;
When perforating roller outlet cone angle was 2.5 °～4.75 °, top roll off awl β angular region was: 4.5 °～7.5 °.
The utility model has the advantages that: compared with prior art, reach 20% and during the big hole enlargement production of above roll piercing at enlarging rate, the bodkin radius is not subjected to the influence of roll off coning angle and bodkin length, is difficult for rolling card during perforation, electric current can not transship, and reaches the capillary outer diameter requirement of big hole enlargement.
Description of drawings
Fig. 1 is the top structure schematic diagram of prior art;
Fig. 2 is a top structure schematic diagram of the present utility model.
The specific embodiment
With reference to Fig. 2, structure of the present utility model comprises bodkin 1 and roll off awl 2, and described roll off awl 1 has a roll off cone angle beta; Adopt unsmooth transition between described bodkin 1 and the roll off awl 2, a perforation cone angle, α ≠ β are arranged between bodkin 1 and the roll off awl 2; The perforation cone angle is 2.0 °; Going out between the prostomum 31 of top roll off awl 2 and perforating roller 3 is unequal along rolling direction gap 4; When perforating roller 3 outlet cone angles during at 3.5 °, β=5 °; Top diameter of phi D=166mm, Φ d=138mm, Φ F=30mm, bodkin 1 radius R=402mm.
The utility model reaches 20% and during the big hole enlargement production of above roll piercing at enlarging rate, and the bodkin radius is not subjected to the influence of roll off coning angle and bodkin length, and electric current can not transship during perforation, and reaches the capillary outer diameter requirement of hole enlargement.
Claims (5)
1. top that the big hole enlargement of roll piercing is used, its structure comprise bodkin and roll off awl, and described roll off awl has a roll off cone angle beta; It is characterized in that, adopt unsmooth transition between described bodkin and the roll off awl, a perforation cone angle is arranged between bodkin and the roll off awl, described perforation cone angle is not equal to the roll off cone angle beta.
2. the top that the big hole enlargement of a kind of roll piercing as claimed in claim 1 is used is characterized in that, the scope of described perforation cone angle is 2.0 °～5.0 °.
3. the top that the big hole enlargement of a kind of roll piercing as claimed in claim 1 or 2 is used is characterized in that, described top roll off awl and going out between the prostomum of perforating roller do not wait along the rolling direction gap.
4. the top that the big hole enlargement of a kind of roll piercing as claimed in claim 1 or 2 is used is characterized in that, when perforating roller outlet cone angle was 2.5 °～4.75 °, the scope of described roll off cone angle beta was: 4.5 °～7.5 °.
5. the top that the big hole enlargement of a kind of roll piercing as claimed in claim 3 is used is characterized in that, when perforating roller outlet cone angle was 2.5 °～4.75 °, the scope of described roll off cone angle beta was: 4.5 °～75 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216450 CN2551367Y (en) | 2002-03-28 | 2002-03-28 | Mandrel for roll piercing large expanding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216450 CN2551367Y (en) | 2002-03-28 | 2002-03-28 | Mandrel for roll piercing large expanding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2551367Y true CN2551367Y (en) | 2003-05-21 |
Family
ID=33695439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02216450 Expired - Lifetime CN2551367Y (en) | 2002-03-28 | 2002-03-28 | Mandrel for roll piercing large expanding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2551367Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346194B (en) * | 2005-12-07 | 2010-05-19 | 住友金属工业株式会社 | Plug used in boring machine |
| CN101947551A (en) * | 2010-08-18 | 2011-01-19 | 衡阳华菱钢管有限公司 | Plug for large-hole series medium- and thick-wall capillaries |
| CN105689409A (en) * | 2016-02-03 | 2016-06-22 | 西安建筑科技大学 | Method for controlling tail wiggling quantity of inclined rolling perforator |
| CN107138532A (en) * | 2017-06-22 | 2017-09-08 | 烟台宝钢钢管有限责任公司 | A kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe |
-
2002
- 2002-03-28 CN CN 02216450 patent/CN2551367Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346194B (en) * | 2005-12-07 | 2010-05-19 | 住友金属工业株式会社 | Plug used in boring machine |
| CN101947551A (en) * | 2010-08-18 | 2011-01-19 | 衡阳华菱钢管有限公司 | Plug for large-hole series medium- and thick-wall capillaries |
| CN105689409A (en) * | 2016-02-03 | 2016-06-22 | 西安建筑科技大学 | Method for controlling tail wiggling quantity of inclined rolling perforator |
| CN105689409B (en) * | 2016-02-03 | 2017-12-22 | 西安建筑科技大学 | A kind of method for controlling the Mannesmann piercing mill amount of wagging the tail |
| CN107138532A (en) * | 2017-06-22 | 2017-09-08 | 烟台宝钢钢管有限责任公司 | A kind of drilling/rolling method and special equipment for producing thin-wall seamless steel pipe |
| CN107138532B (en) * | 2017-06-22 | 2018-11-27 | 烟台宝钢钢管有限责任公司 | A kind of drilling/rolling method and special equipment producing thin-wall seamless steel pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120328 Granted publication date: 20030521 |