CN107583954B - Hot drawing continuous rolled pipe production line and pipe manufacturing method - Google Patents
Hot drawing continuous rolled pipe production line and pipe manufacturing method Download PDFInfo
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- CN107583954B CN107583954B CN201710971809.2A CN201710971809A CN107583954B CN 107583954 B CN107583954 B CN 107583954B CN 201710971809 A CN201710971809 A CN 201710971809A CN 107583954 B CN107583954 B CN 107583954B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The invention relates to a hot-drawing continuous rolled pipe production line and a pipe production method, wherein the production line comprises a necking machine, a roller module, a pull rod device, a rod loosening machine and a rod removing machine which are sequentially arranged, the pull rod device comprises a driving device, a pull rod and a core rod connecting device, the core rod connecting device is arranged at one end of the pull rod and at the outlet of the roller module, a core rod separating device is further arranged at the outlet of the roller module, and the driving device drives a hollow capillary pipe after the pull rod pulls the necking to be continuously rolled together with the core rod through a certain number of die holders and then separated from the core rod.
Description
Technical Field
The invention belongs to the technical field of material metallurgy, and relates to a hot drawing continuous rolling pipe production line and a pipe production method.
Background
In the field of metallurgical steel rolling, the continuous rolling technology is the most advanced technology at present, is widely applied, can greatly improve the productivity of a unit, and has good product quality and mechanical property of rolled materials. Continuous rolling is a multi-pass continuous rolling of a rolled material by a plurality of stands.
The mandrel bar unit is a continuous rolling process in a hot-rolled seamless steel tube, the current popular pipe jacking process is CPE (customer premise equipment) namely a Cross-roll PIERCING AND Elongation process, a pipe blank is penetrated into a blank pipe on a Cross-roll perforating machine, a mandrel with a step at the head part is penetrated, extrusion necking is carried out by a necking machine, and the head part of the blank pipe is tightly wrapped on the step at the head part of the mandrel so as to bear the jacking force during pipe jacking rolling. The steel pipe penetrating the core rod and having the head reduced is put into a rolling line, and the steel pipe penetrating the core rod is pushed by the rack belt ejector rod to enter a plurality of groups of non-transmission roller dies for continuous pass rolling. After rolling is finished, the rack and the ejector rod are retracted together, the rolled steel pipe is tightly wrapped on the core rod, the rod is loosened by a rod loosening machine with staggered rollers, then the rod is removed, and the core rod enters the next rolling through a circulation system.
The ejector rod unit is suitable for rolling small-caliber seamless steel pipes, is suitable for thin walls and medium walls, and is suitable for jacking in the process of jacking because the ejector rods and the core rods are elongated rods and bear large jacking force, and the ejector rods and the core rods are often bent or even broken due to poor stress working conditions. Meanwhile, in the jacking process, the center position is not easy to keep consistent, the wall thickness precision of the product is poor, and the expansion of the product specification is limited.
Disclosure of Invention
In view of the above, the present invention aims to provide a hot drawing continuous rolling pipe production line and a pipe manufacturing method, which can improve the stress conditions of a pull rod and a mandrel and prolong the service life of the pull rod and the mandrel.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The hot drawing continuous rolling pipe production line comprises a necking machine, a roller module, a pull rod device, a rod loosening machine and a rod releasing machine which are sequentially arranged, wherein the pull rod device comprises a driving device, a pull rod and a core rod connecting device, the core rod connecting device is arranged at one end of the pull rod and at the outlet of the roller module, and the outlet of the roller module is also provided with a core rod separating device.
Further, the device also comprises a puncher and a clamping device, wherein the puncher and the clamping device are arranged at the inlet of the necking machine, and the puncher is arranged at one side of the production line.
Further, the mandrel cooling device is arranged at the outlet of the rod removing machine, and the mandrel preheating device is arranged at the inlet of the necking machine to form a mandrel conveying cycle.
Further, the driving device comprises a main transmission device and a gear rack, and the pull rod is arranged on the rack and driven by the main transmission device.
Further, the roller module comprises a plurality of die holders, each die holder is formed into a closed hole type by a plurality of free rollers, and roller bottoms or roller gaps of the adjacent die holders are staggered.
Further, each die holder has three free rollers.
A hot drawing continuous rolling pipe making method includes such steps as inserting core rod into hollow capillary, shrinking on rolling line, driving the pull rod to enter rolling bed from the outlet side of roller module, automatically connecting the hollow capillary with core rod, continuously rolling the hollow capillary with core rod by a certain number of dies, pulling the hollow capillary with core rod out of dies, separating the pull rod from core rod, pulling the pull rod back to waiting position, pulling the core rod from hollow capillary, loosening the core rod, and drawing the core rod out of rod loosening machine.
Further, the drawn core rod is cooled and lubricated, the core rod needing to be subjected to die repair is rolled by a rolling machine, then is preheated to a lubricating temperature by a core rod preheating furnace, and is subjected to cyclic treatment.
Further, the hollow capillary is penetrated by the perforating machine, and the core rod is clamped by the clamping and conveying device to penetrate into the hollow capillary.
The invention has the beneficial effects that: the invention changes the stress condition of the two slender rod pieces of the mandril and the mandril from pressing to pulling, greatly improves the stress working condition and prolongs the service life of the mandril and the pull rod. Meanwhile, in the drawing and rolling process, the central position of the core rod is easier to ensure, the wall thickness precision of the steel pipe is greatly improved, and meanwhile, the product specification can be expanded to extremely thin steel pipes and thicker steel pipes. The application range can be enlarged to a steel pipe with a larger caliber due to the improvement of the stress working condition.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of a production line of the present invention;
fig. 2 is a schematic view of an arrangement of roller modules.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the hot-drawing continuous rolled tube production line comprises a necking machine 2, a roller module 3, a pull rod device 7, a rod loosening machine 8 and a rod releasing machine 9 which are sequentially arranged, wherein the pull rod device 7 comprises a driving device, a pull rod and a core rod connecting device, the core rod connecting device is arranged at one end of the pull rod and at the outlet of the roller module 3, and a core rod separating device 5 is further arranged at the outlet of the roller module 3. Wherein 12 is a core rod and 16 is a hollow capillary. The invention discloses a mandrel connecting device and a mandrel separating device, which are both existing devices for realizing automatic connection and separation of mandrels, and as the application number 2014100538531 discloses a bar automatic clamping device, the clamping and loosening of a collet chuck on bars can be controlled by changing the rotating speed of a motor, and mechanical air pawls commonly used in the mechanical field can also be adopted.
The production line also comprises a perforating machine 1 and a clamping and conveying device 15 which are arranged at the inlet of the necking machine 2, wherein the clamping and conveying device 15 adopts the existing pinch roll to clamp the core rod, so that the core rod is subsequently penetrated into the hollow capillary, and the perforating machine 1 is arranged at one side of the production line.
After the rod removing machine 9, the mandrel conveying device further comprises a cooling device 10, a lubricating device 11, a rolling machine 14 and a mandrel preheating device 13 which are sequentially arranged, wherein the cooling device 10 is arranged at the outlet of the rod removing machine 9, and the mandrel preheating device 13 is arranged at the inlet of the necking machine 2 to form a mandrel conveying cycle. The mandrel bar preheating device 13 of this embodiment adopts a preheating furnace.
In this embodiment, the driving device includes a main transmission device 6 and a rack and pinion, and the pull rod is mounted on the rack through the clamping seat and driven by the main transmission device, so that the core rod is pulled by the pull rod and can move along with the rack.
In this embodiment, as shown in fig. 2, the roller module 3 includes a plurality of die holders 4, each die holder 4 is formed by a plurality of free rollers to form a closed hole, in this embodiment, each die holder 4 has three free rollers, the roller bottoms or roller gaps of the adjacent die holders 4 are staggered, and the number and positions of the rollers or roller gaps are automatically calculated and set according to different sizes of rolled pieces.
A hot drawing continuous rolling pipe making method, penetrating the core rod into the hollow capillary, shrinking the core rod on the shrinking machine 2 on the rolling line, at the same time, driving the pull rod to enter the rolling bed from the outlet side of the roller module 3, making the head of the pull rod automatically connect the hollow capillary after shrinking and the core rod, driving the pull rod to pull the hollow capillary after shrinking together with the core rod to continuously roll through a certain number of die holders 4, after rolling, the pull rod pulls the hollow capillary with the core rod out of the die holders 4, at the position where the core rod goes away from the steel wire, a core rod separating device 5 is arranged, the pull rod is separated from the core rod, and then the pull rod is continuously retreated to the waiting position, the core rod and the hollow capillary are pulled out to the front roller way of the rod loosening machine 8, transported to the rod loosening machine 8 to loose the rod, making the core rod and the capillary generate a gap, and then the core rod is pulled out by the rod releasing machine 9. The extracted core rod is respectively cooled and lubricated by a cooling device 10 and a lubricating device 11, the core rod needing to be subjected to die repairing is subjected to rolling treatment by a rolling machine 14, and then is preheated to a lubricating temperature by a core rod preheating device 13, and then is subjected to circulating treatment. The perforating machine 1 is used for perforating hollow capillary tubes, and the core rod is clamped by the clamping and conveying device 15 to penetrate the hollow capillary tubes.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (3)
1. A hot drawing continuous rolling pipe making method is characterized in that: the production line adopted by the method comprises a necking machine, a roller module, a pull rod device, a rod loosening machine and a rod removing machine which are sequentially arranged, wherein the pull rod device comprises a driving device, a pull rod and a core rod connecting device, the core rod connecting device is arranged at one end of the pull rod and at the outlet of the roller module, and a core rod separating device is further arranged at the outlet of the roller module; the pull rod is continuously retreated to a waiting position after the pull rod is separated from the core rod by the core rod separating device; the mandrel preheating device is arranged at the inlet of the necking machine to form a mandrel conveying cycle; the perforating machine is arranged on one side of the production line; the roller module comprises a plurality of die holders, each die holder is formed into a closed hole type by a plurality of free rollers, and roller bottoms or roller gaps of adjacent die holders are staggered;
The method comprises the steps that a perforating machine penetrates through a hollow capillary, a clamping and conveying device clamps a core rod to penetrate into the hollow capillary, necking is carried out on a rolling line, a driving device drives a pull rod to enter a rolling bed from the outlet side of a roller module while necking, the head of the pull rod is automatically connected with the hollow capillary after the necking and the core rod, the driving device drives the pull rod to pull the hollow capillary after the necking together with the core rod to continuously roll through a certain number of die holders, after rolling is finished, the pull rod fully pulls out the hollow capillary with the core rod from the die holders, a core rod separating device continuously withdraws the pull rod from the core rod to a waiting position, the core rod and the hollow capillary are pulled out onto a roller way in front of a rod loosening machine together, the core rod is conveyed to the rod loosening machine to enable the core rod and the capillary to generate a gap, and then the core rod is pulled out by a rod releasing machine; the drawn core rod is cooled and lubricated, the core rod needing to be subjected to die repairing is rolled by a rolling machine, preheated to the lubricating temperature by a core rod preheating device, and then subjected to circulating treatment.
2. The hot-drawn tandem mill tube making method as set forth in claim 1, wherein: the driving device comprises a main transmission device and a gear rack, and the pull rod is arranged on the rack and driven by the main transmission device.
3. The hot-drawn tandem mill tube making method as set forth in claim 1, wherein: each die holder has three free rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710971809.2A CN107583954B (en) | 2017-10-18 | 2017-10-18 | Hot drawing continuous rolled pipe production line and pipe manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710971809.2A CN107583954B (en) | 2017-10-18 | 2017-10-18 | Hot drawing continuous rolled pipe production line and pipe manufacturing method |
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| Publication Number | Publication Date |
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| CN107583954A CN107583954A (en) | 2018-01-16 |
| CN107583954B true CN107583954B (en) | 2024-05-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110722004B (en) * | 2019-10-25 | 2021-08-20 | 绍兴东喆科技有限公司 | Rolling method of metal pipe |
| CN114273447B (en) * | 2021-11-23 | 2022-10-11 | 杰森能源技术有限公司 | Method for manufacturing metal pipe |
| CN115722626B (en) * | 2022-11-29 | 2024-03-26 | 中国第一重型机械股份公司 | Combined step extrusion die and forming method |
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| CN103272845A (en) * | 2013-05-02 | 2013-09-04 | 长葛市一鸣机械有限公司 | Hot rolling process of small-bore ultra-thin-wall seamless steel tube |
| CN203170858U (en) * | 2013-04-10 | 2013-09-04 | 中冶赛迪工程技术股份有限公司 | Hollow billet reducing device for tube push bench front table |
| JP2013237083A (en) * | 2012-05-16 | 2013-11-28 | Jfe Steel Corp | Method of manufacturing seamless steel pipe |
| CN104384192A (en) * | 2014-11-14 | 2015-03-04 | 北京京诚之星科技开发有限公司 | Tube drawing machine and seamless tube rolling method |
| CN104826868A (en) * | 2015-02-10 | 2015-08-12 | 长葛市一鸣机械有限公司 | Small-diameter seamless steel pipe floating mandrel continuous mill unit and seamless steel pipe production process |
| CN207288358U (en) * | 2017-10-18 | 2018-05-01 | 中冶赛迪装备有限公司 | Hot pull tandem rolling tubulation production line |
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2017
- 2017-10-18 CN CN201710971809.2A patent/CN107583954B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013237083A (en) * | 2012-05-16 | 2013-11-28 | Jfe Steel Corp | Method of manufacturing seamless steel pipe |
| CN203170858U (en) * | 2013-04-10 | 2013-09-04 | 中冶赛迪工程技术股份有限公司 | Hollow billet reducing device for tube push bench front table |
| CN103272845A (en) * | 2013-05-02 | 2013-09-04 | 长葛市一鸣机械有限公司 | Hot rolling process of small-bore ultra-thin-wall seamless steel tube |
| CN104384192A (en) * | 2014-11-14 | 2015-03-04 | 北京京诚之星科技开发有限公司 | Tube drawing machine and seamless tube rolling method |
| CN104826868A (en) * | 2015-02-10 | 2015-08-12 | 长葛市一鸣机械有限公司 | Small-diameter seamless steel pipe floating mandrel continuous mill unit and seamless steel pipe production process |
| CN207288358U (en) * | 2017-10-18 | 2018-05-01 | 中冶赛迪装备有限公司 | Hot pull tandem rolling tubulation production line |
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