CN101172287A - Limiting core rod cold drawn tube technique and equipment thereof - Google Patents
Limiting core rod cold drawn tube technique and equipment thereof Download PDFInfo
- Publication number
- CN101172287A CN101172287A CNA2007102025130A CN200710202513A CN101172287A CN 101172287 A CN101172287 A CN 101172287A CN A2007102025130 A CNA2007102025130 A CN A2007102025130A CN 200710202513 A CN200710202513 A CN 200710202513A CN 101172287 A CN101172287 A CN 101172287A
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- steel pipe
- plug
- core rod
- pipe base
- withdrawing pattern
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Abstract
The invention discloses a production process of a steel pipe and the equipment thereof, in particular to a steel pipe cold drawing production process of and the equipment thereof. The steel pipe cold drawing process provided by the invention is that the frictional force between a tube blank and a core rod is smaller than the frictional force of the drawing method of the short core rod, and the length of the short core rod is shorter than the length of the long core rod by adopting the steel pipe cold drawing process, the invention comprises the following steps: A. The steel tube blank before being drawn is penetrated into a drawing pattern, and the core rod is penetrated in the steel tube blank; B. A cold drawing clamping head is used to clamp the steel tube blank and penetrates through the forehead part of a pattern drawing section, and the drawing is performed to the steel tube blank; C. During the drawing process, the drawing speed of the steel tube blank V1 is larger than the traveling speed V2 of the core rod; D. The core rod is separated from the rod. The invention still provides a cold-drawn pipe machine for limiting the core rod. The process and the equipment are adopted by the invention, the frictional force between the steel tube blank and the core rod is reduced, the abrasion and the change frequency of the core rod are reduced, the production cost is reduced, and the production efficiency and the quality of a product are improved.
Description
Technical field
The present invention relates to a kind of production technology and equipment thereof of steel pipe, particularly be applicable to the production technology and the equipment thereof of cold group of steel pipe.
Background technology
Existing steel pipe cold-drawn production technology mainly contains the empty sinking method and cored bar (top) the draw method of no plug, and wherein, cored bar draw method has and comprises short plug draw method and mandrel drawing method.
When adopting weak point plug draw method, plug, is not moved with steel pipe in the drawing deformation district by the plug cart stationary.After the steel pipe draw was finished, automatic and plug broke away from, and finishes draw.This draw method exists between steel pipe internal-surface and the mandrel surface sliding speed big, and the shortcoming that frictional force is big, draw power is big causes the plug quick abrasion, changes frequently, and production cost increases.And the residual stress of the cold drawing steel tube of producing is big.
When adopting the mandrel drawing method, plug is through in the steel pipe, and clamp is clamped the steel pipe head steel pipe and plug were pulled out withdrawing pattern (deformed area) together, is floating core rod.This method has reduced the frictional force of plug and steel pipe internal-surface greatly, has improved the service life of plug, and the inhomogeneous deformation and the residual stress of steel pipe are little, can strengthen pass deformation.But it is very long that plug requires, and above the length of steel pipe behind the draw, and the plug spare part quantitative requirement of preparing increases.After draw is finished, also need the special-purpose excellent equipment that takes off, plug is taken off rod from steel pipe, increased technological process and equipment.
Summary of the invention
The frictional force that technical problem to be solved by this invention provides between a kind of pipe and the plug is littler than short plug draw method, and its plug length steel pipe cold-drawing technology and equipment thereof shorter than the plug length of mandrel drawing method.
The technical scheme that technical solution problem of the present invention is adopted is: limiting core rod cold drawn tube technique may further comprise the steps:
A. the steel pipe base before the draw is penetrated withdrawing pattern, and plug is through in the steel pipe base;
B. the cold-drawn chuck is clamped the fore head that the steel pipe base passes the withdrawing pattern section, and the steel pipe base is carried out draw;
C. in the process of tube plug drawing mill, the steel pipe base dial system speed V
1Translational speed V greater than plug
0
D. after the steel pipe draw is finished and broken away from withdrawing pattern, carry out plug and take off rod.
Wherein as further improving: the translational speed V of plug
0/ group system speed V
1=0.2～0.8.The best is 0.3～0.6.
The present invention also provides the limiting core rod cold drawn tube machine, comprises withdrawing pattern, cold-drawn chuck, is provided with the retained mandrel dolly before the withdrawing pattern entrance point, and plug is installed on the restraint dolly, and the retained mandrel dolly adopts transmission device to drive and moves in rolling direction.
During the retained mandrel draw, plug moves along the draw direction with steel pipe, but the movement velocity of plug is by special stopper mechanism control, its speed is lower than the draw speed of steel pipe, plug when it both had been different from fixed plug drawing is motionless, when also being different from the floating core rod draw, the plug movement velocity is identical with steel pipe draw speed.Adopt limiting core rod cold drawn tube technique of the present invention, because more original short plug draw method, frictional force between steel pipe base and the plug reduces, and has reduced the wearing and tearing of plug and has changed frequency, has reduced production cost, improved the quality of production efficiency and product, mandrel drawing method has more originally shortened the length of plug, has cancelled excellent program of taking off of plug and equipment, save the manufacturing cost of equipment and the floor space of factory building, reduced the quantity of plug spare part.
Description of drawings
Fig. 1 is a plug restraint drawn tube schematic representation of apparatus of the present invention;
Fig. 2 is first kind of embodiment of shift fork structure of the present invention;
Fig. 3 is second kind of embodiment of shift fork structure of the present invention.
Wherein Reference numeral is: 1-restraint dolly, 2-steel pipe base, 3-withdrawing pattern, 4-plug, 5-cold-drawn chuck, 6-shift fork, 7-shift fork hydraulic cylinder, 8-gripping section, 9-draw pipe.
The specific embodiment
Limiting core rod cold drawn tube technique of the present invention may further comprise the steps:
A. the steel pipe base before the draw is penetrated withdrawing pattern, and plug is through in the steel pipe base;
B. the cold-drawn chuck is clamped the gripping section of steel pipe base, and the steel pipe base is carried out draw;
C. in the process of tube plug drawing mill, the steel pipe base dial system speed V
1Translational speed V greater than plug
0
D. after the steel pipe draw is finished and broken away from withdrawing pattern, carry out plug and take off rod.
Wherein, the translational speed V of plug
0/ group system speed V
1=0.2～0.8.But frictional force between pipe and the plug when taking all factors into consideration draw, and factor such as on-the-spot needs of the Design of length of plug, production line, the range of choice of the best is V
0/ V
1=0.3～0.6.
The present invention is described in detail below in conjunction with embodiment.
As shown in Figure 1, earlier plug 4 is placed on the restraint dolly 1, restraint dolly 4 is installed on the restraint dolly slideway of the draw production line identical with withdrawing pattern 3, and the restraint dolly adopts motion modes such as chain transmission or hydraulic cylinder transmission.Steel pipe base 2 is put on the stand before the withdrawing pattern 3, the stand that this stand is identical with existing draw stand or employing combines with the dolly slideway, need only satisfied can with steel pipe base 2 can with withdrawing pattern 3 and plug 4 centerings.By the motion of restraint dolly 1, plug is through in the steel pipe base 2 then, withdrawing pattern 3 is clamped and passed to the head gripping section 8 of steel pipe base 2 by cold-drawn chuck 5, carries out draw.In process of tube plug drawing mill, along with cold-drawn chuck 5 drives steel pipe base 2 draws, restraint dolly 1 also drives plug 4 to the motion of draw direction, but group system speed V of steel pipe base
1Translational speed V greater than plug
0, so the relative velocity that produces between steel pipe base 2 and the plug 4 is lower than group system speed V
1, reduced friction each other.
In order to prevent to take off in the rod motion, the intact steel pipe base 2 of draw is with plug 4 motions, is provided with the shift fork 6 that moves both vertically with rolling direction at the port of export of withdrawing pattern 3.As shown in Figure 2, fork 6 is installed in the outside of withdrawing pattern 3, and a chute can be set on withdrawing pattern 3, and fork 6 moves in above-mentioned chute, and drives the shift fork motion by lowering or hoisting gear such as shift fork hydraulic cylinder 7.The structure of chute adopts modes such as common slideway, channel-section steel, its objective is when shift fork 6 motions spacing.In that steel pipe base 2 draws are intact when leaving withdrawing pattern 3, fork hydraulic cylinder 7 rises fork 6 and withstands steel pipe base 2, makes the part of periphery of the rear end face of steel pipe base 2 support the port of export of withdrawing pattern 3, prevents that steel pipe base 2 from moving with the plug 4 that takes off rod.Fork hydraulic cylinder 7 also can adopt mode or structures such as cylinder.The installation site of fork 6 can also be any direction in withdrawing pattern 3 outsides, as long as the rear end of steel pipe base 2 is against on the port of export of withdrawing pattern 3, realizes preventing that steel pipe base 2 from moving gets final product.
In conjunction with the embodiments 1, as shown in Figure 1, after steel pipe base 2 draws are finished, adopt fork 6 structures as shown in Figure 2.But fork hydraulic cylinder 7 between the rear end face of shift fork 6 steel-fastening pipes 2 and the port of export of withdrawing pattern 3, carries out the plug demoulding after fork 6 is risen, and also can reach the identical purpose that steel pipe base 2 moves that prevents.
Claims (13)
1. limiting core rod cold drawn tube technique may further comprise the steps:
A. the steel pipe base before the draw is penetrated withdrawing pattern, and plug is through in the steel pipe base;
B. the cold-drawn chuck is clamped the fore head that the steel pipe base passes the withdrawing pattern section, and the steel pipe base is carried out draw;
C. in the process of tube plug drawing mill, the steel pipe base dial system speed V
1Translational speed V greater than plug
0
D. after the steel pipe draw is finished and broken away from withdrawing pattern, carry out plug and take off rod.
2. retained mandrel tube drawing technology as claimed in claim 1 is characterized in that: the moving direction of plug is identical with the draw direction of motion of steel pipe base.
3. retained mandrel tube drawing technology as claimed in claim 1 is characterized in that: the translational speed V of plug
0/ group system speed V
1=0.2～0.8.
4. retained mandrel tube drawing technology as claimed in claim 2 is characterized in that: the translational speed V of plug
0/ group system speed V
1=0.3～0.6.
5. retained mandrel tube drawing technology as claimed in claim 1 is characterized in that: after plug was through in the steel pipe base, the steel pipe base also left gripping section and clamps the steel pipe base by the cold-drawn chuck.
6. retained mandrel tube drawing technology as claimed in claim 1 is characterized in that: the lifting shift fork that described step D employing is arranged on the withdrawing pattern back carries out plug and takes off rod.
7. retained mandrel tube drawing technology as claimed in claim 6 is characterized in that: after steel pipe base draw is finished, make the part of periphery of the rear end face of steel pipe base be against the port of export of withdrawing pattern by the shift fork lifting, carry out the plug demoulding.
8. retained mandrel tube drawing technology as claimed in claim 6 is characterized in that: after steel pipe base draw is finished, between the rear end face and the port of export of withdrawing pattern of shift fork by lifting steel-fastening pipe, carry out the plug demoulding.
9. the limiting core rod cold drawn tube machine comprises withdrawing pattern, cold-drawn chuck, it is characterized in that: be provided with the retained mandrel dolly before the withdrawing pattern entrance point, plug is installed on the restraint dolly, and the retained mandrel dolly adopts transmission device to drive and moves in rolling direction.
10. limiting core rod cold drawn tube machine as claimed in claim 9 is characterized in that: the transmission device of retained mandrel dolly is chain transmission or hydraulic cylinder transmission.
11. as claim 9 or 10 described limiting core rod cold drawn tube machines, it is characterized in that: the port of export at withdrawing pattern (3) is provided with the shift fork (6) that moves both vertically with rolling direction, and fork (6) is connected with lowering or hoisting gear.
12. limiting core rod cold drawn tube machine as claimed in claim 11 is characterized in that: described lowering or hoisting gear is fork hydraulic cylinder (7) or cylinder.
13. limiting core rod cold drawn tube machine as claimed in claim 11 is characterized in that: described shift fork (6) is installed in the chute of the setting and withdrawing pattern (3) port of export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102025130A CN100528390C (en) | 2007-11-14 | 2007-11-14 | Limiting core rod cold drawn tube technique and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102025130A CN100528390C (en) | 2007-11-14 | 2007-11-14 | Limiting core rod cold drawn tube technique and equipment thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101172287A true CN101172287A (en) | 2008-05-07 |
| CN100528390C CN100528390C (en) | 2009-08-19 |
Family
ID=39421157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007102025130A Expired - Fee Related CN100528390C (en) | 2007-11-14 | 2007-11-14 | Limiting core rod cold drawn tube technique and equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100528390C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327915A (en) * | 2011-07-29 | 2012-01-25 | 胡顺珍 | Long-core-rod drawing device |
| CN102513389A (en) * | 2011-11-21 | 2012-06-27 | 胡顺珍 | Long core rod composite die pipe drawing device |
| CN112157431A (en) * | 2020-09-01 | 2021-01-01 | 无锡市腾茂液压机械有限公司 | Manufacturing process of high-precision cold drawn pipe |
| CN112246898A (en) * | 2020-09-25 | 2021-01-22 | 北京工业大学 | Preparation method for Mg-Zn-Mn-Ca magnesium alloy micro-tube |
| CN112756424A (en) * | 2020-12-19 | 2021-05-07 | 江苏图南合金股份有限公司 | Method for expanding and drawing metal pipe |
| CN112934992A (en) * | 2021-03-29 | 2021-06-11 | 中国科学院金属研究所 | Differential long-core-head pipe drawing method |
| CN114102071A (en) * | 2021-12-01 | 2022-03-01 | 浙江中达新材料股份有限公司 | Production process of inner-groove austenitic stainless steel seamless steel pipe for efficient heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103588A (en) * | 1987-05-14 | 1988-11-30 | 徐宏熔 | High accuracy solid drawn tube processing easy device |
-
2007
- 2007-11-14 CN CNB2007102025130A patent/CN100528390C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327915A (en) * | 2011-07-29 | 2012-01-25 | 胡顺珍 | Long-core-rod drawing device |
| CN102513389A (en) * | 2011-11-21 | 2012-06-27 | 胡顺珍 | Long core rod composite die pipe drawing device |
| CN112157431A (en) * | 2020-09-01 | 2021-01-01 | 无锡市腾茂液压机械有限公司 | Manufacturing process of high-precision cold drawn pipe |
| CN112246898A (en) * | 2020-09-25 | 2021-01-22 | 北京工业大学 | Preparation method for Mg-Zn-Mn-Ca magnesium alloy micro-tube |
| CN112756424A (en) * | 2020-12-19 | 2021-05-07 | 江苏图南合金股份有限公司 | Method for expanding and drawing metal pipe |
| CN112934992A (en) * | 2021-03-29 | 2021-06-11 | 中国科学院金属研究所 | Differential long-core-head pipe drawing method |
| CN114102071A (en) * | 2021-12-01 | 2022-03-01 | 浙江中达新材料股份有限公司 | Production process of inner-groove austenitic stainless steel seamless steel pipe for efficient heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100528390C (en) | 2009-08-19 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Pangang Group Chengdu steel vanadium Co., Ltd. Assignor: Pangang Group Chengdu Iron & Steel Co., Ltd Contract fulfillment period: 2009.11.24 to 2015.11.24 contract change Contract record no.: 2009510000174 Denomination of invention: Limiting core rod cold drawn tube technique and equipment thereof Granted publication date: 20090819 License type: Exclusive license Record date: 20091130 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.11.24 TO 2015.11.24; CHANGE OF CONTRACT Name of requester: PANGANG GROUP CHENGDU STEEL + VANADIUM CO., LTD. Effective date: 20091130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20161114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |