CN102228905A - Production process of hot continuous rolling seamless steel tube with small caliber - Google Patents
Production process of hot continuous rolling seamless steel tube with small caliber Download PDFInfo
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- CN102228905A CN102228905A CN2011100910906A CN201110091090A CN102228905A CN 102228905 A CN102228905 A CN 102228905A CN 2011100910906 A CN2011100910906 A CN 2011100910906A CN 201110091090 A CN201110091090 A CN 201110091090A CN 102228905 A CN102228905 A CN 102228905A
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Abstract
The invention discloses a production process of a hot continuous rolling seamless steel tube with a small caliber, solving the problems that energy consumption is high, yield is low, and environment is polluted in the process of producing the seamless steel tube with the small caliber by perforating and cold drawing in the traditional process. The process comprises the following steps: heating: heating a pipe blank in a heating furnace; perforating: arranging a perforation machine for perforating the heated pipe blank; five-rack continuous rolling: pre-penetrating a retained mandrel through a perforated hollow billet, and continuously extending and rolling the perforated hollow billet through continuously distributed five-rack retained mandrel continuous rolling pipe machines; pipe removing: arranging a mechanical pipe-removing device behind the five-rack continuous rolling sets, removing the pierced billet subjected to five continuous rolling from a core rod and then entering into the next working procedure, namely a 24-rack tension reducing working procedure; 24-rack tension reducing: arranging 24 three-roll tension reducing racks behind the continuous rolling sets, and rolling the continuously rolled pierced billet by the 24 three-roll tension reducing racks so as to form a hot finished steel pipe; and finishing: finishing the hot finished steel pipe so as to form a finished steel pipe.
Description
Technical field
The present invention relates to a kind of small-bore hot continuous rolling seamless steel tube production technology, belong to metal rolled technical field.
Background technology
What the production technology of traditional following small-caliber seamless steel pipe of production 76mm adopted is perforation, pickling, cold-drawing technology production small-caliber seamless steel pipe, the energy consumption in production process height of this backwardness, low, the contaminated environment of lumber recovery.
Summary of the invention
The purpose of this invention is to provide a kind of production technology that adopts the international advanced few frame retained mandrel continuous rolling technology of MIN-MPM to produce small-caliber seamless steel pipe.
For achieving the above object, the present invention adopts following technical scheme: the few frame retained mandrel continuous rolling technology of MIN-MPM provided by the invention is produced small-bore hot continuous rolling seamless steel tube production technology, comprises the steps:
Heating is heated pipe in heating furnace;
Perforation is provided with a punch pipe after heating is bored a hole;
Hollow billet after 5 frame tandem rollings will be bored a hole extends rolling by 5 frame retained mandrel tandem rolling tube machines of continuous layout.
Take off pipe and behind 5 frame tandem rolling units, machinery is set and takes off pipe unit, the hollow forging behind 5 tandem rollings is deviate to enter next operation-24 frame stretch reducing operation from plug.
24 frame stretch reducings dispose 24 frame three-roller tension reducing mill framves after machinery takes off pipe unit, take off hollow forging behind the pipe and enter 24 frame three-roller tension reducing mill framves and be rolled, and form hot fished pipe.
Finishing forms fished pipe after with hot fished pipe finishing.
Further, described step adds pines for, with heating of pipe blank to 1100～1280 ℃.
Wherein, described heating furnace is Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace.
In the described step perforation, utilize punch that pipe is bored a hole, described punch is vertical cone mill, the vertical punch of Diesel.
In the described step 5 frame tandem rolling, be through the hollow billet after the perforation on the retained mandrel in advance, the hollow billet of 5 frame retained mandrel tandem rolling tube machines by continuous layout after to perforation extends rolling continuously, and described tandem rolling tube machine is MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine.
Described step is taken off in the pipe, the hollow forging behind 5 tandem rollings is taken off pipe unit by machinery deviate from from plug, and described winding arbor extraction press structure is that machinery takes off pipe unit.
In the described step 24 frame stretch reducing, the frame quantity of using in the actual production is decided on product specification, and different product specifications are used the frame of different numbers, maximum available 24 frames, and described stretch-reducing mill is 24 frame three-roller tension reducing mills.
Described step finishing, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test,, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation.
The invention has the beneficial effects as follows: adopt the few frame retained mandrel continuous rolling technology of international advanced MIN-MPM to substitute the backward manufacturing process that conventional arts such as traditional automatic tube rolling mill and perforation+cold-drawn are produced small-caliber seamless steel pipe.Its social economic effect that brings is: low consumption, lumber recovery height (reaching more than 95%), environmental pollution are little; Its wall thickness accuracy of the fished pipe of continuous rolling process production can reach ± and 6%～8%, the steel pipe length behind the tube reducing can realize two multiple lengths even triple scale, the straight Du Keda 1mm/1000mm behind the aligning.
Description of drawings
Fig. 1 is a kind of small-bore hot continuous rolling seamless steel tube production process chart of the present invention.
The specific embodiment
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of small-bore hot continuous rolling seamless steel tube production technology provided by the invention comprises the steps:
Heating is heated pipe in heating furnace;
Described heating furnace can be selected Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace for use, and the heating-up temperature scope is 1100～1280 ℃.
Perforation is provided with a punch pipe after heating is carried out drilling/rolling;
Described punch can be selected vertical cone mill, the vertical punch of Diesel for use.
Hollow billet after 5 frame tandem rollings will be bored a hole is through on the retained mandrel in advance, extends rolling by 5 frames of continuous layout and the wrong mutually retained mandrel tandem rolling tube machine of roll gap of adjacent breast roller continuously to the hollow billet after boring a hole;
Described tandem rolling tube machine can be selected MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine for use.
Take off pipe and behind 5 frame tandem rolling units, machinery is set and takes off pipe unit, the hollow forging behind 5 tandem rollings is deviate to enter next operation-24 frame stretch reducing operation from plug.
The described pipe unit that takes off can select for use machinery to take off pipe unit.
24 frame stretch reducings dispose 24 frame three-roller tension reducing mill framves after machinery takes off pipe unit, take off hollow forging behind the pipe and enter 24 frame three-roller tension reducing mill framves and be rolled, and form hot fished pipe; The frame quantity of using in the actual production is decided on product specification, and different product specifications are used the frame of different numbers, maximum available 24 frames, and maximum sizing reduction can reach 75%～80%, and maximum wall thickness reducing amount can reach 35%～40%, and lengthening coefficient can reach 6～8.
Described stretch-reducing mill can be selected 24 frame three-roller tension reducing mills for use.
Finishing forms fished pipe after with hot fished pipe finishing.
Finishing procedure is to the cooled further processing of hot fished pipe, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation, finally obtain the commodity steel pipe.
Rolling described in this processing step, be that the total reducing rate by design carries out in the reducing pass system in definite deciding, and the reducing pass system that decides that determines designs according to production specification scope, product requirement, and the parameter of the equipment rack quantity in this processing step, inlet mill speed, frame and equipment is determined according to pass schedule.
Claims (9)
1. a small-bore hot continuous rolling seamless steel tube production technology is characterized in that, comprises the steps:
Heating is heated pipe in heating furnace;
Perforation is provided with a punch pipe after heating is bored a hole;
5 frame tandem rollings are provided with 5 frame tandem rolling tube machines behind punch, hollow billet after the perforation is through on the retained mandrel in advance, extends rolling continuously to the hollow billet after boring a hole by 5 frames of continuous layout and the wrong mutually retained mandrel tandem rolling tube machine of roll gap of adjacent breast roller;
Take off pipe and behind 5 frame tandem rolling units, machinery is set and takes off pipe unit, the hollow forging behind 5 tandem rollings is deviate to enter next operation-24 frame stretch reducing operation from plug;
24 frame stretch reducings dispose 24 frame three-roller tension reducing mill framves after machinery takes off pipe unit, taking off hollow forging behind the pipe enters 24 frame three-roller tension reducing mill framves and is rolled, form hot fished pipe, the frame quantity of using in the actual production is decided on product specification, different product specifications is used the frame of different numbers, at most available 24 frames;
Finishing forms fished pipe after with hot fished pipe finishing.
2. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 is characterized in that described step adds pines for, with heating of pipe blank to 1100～1280 ℃.
3. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 and 2 is characterized in that described heating furnace is Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace.
4. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 is characterized in that, in the described step perforation, utilizes punch that pipe is bored a hole, and described punch is vertical cone mill, the vertical punch of Diesel.
5. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 is characterized in that described tandem rolling tube machine can be selected MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine for use.
6. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 is characterized in that described winding arbor extraction press can select for use machinery to take off pipe unit.
7. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1 is characterized in that described stretch-reducing mill can be selected 24 frame three-roller tension reducing mills for use.
8. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1, it is characterized in that, finishing procedure is to the cooled further processing of hot fished pipe, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test,, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation, finally obtain the commodity steel pipe.
9. a kind of small-bore hot continuous rolling seamless steel tube production technology according to claim 1, it is characterized in that, rolling described in this processing step, be that the total reducing rate by design carries out in the reducing pass system in definite deciding, and the reducing pass system that decides that determines designs according to production specification scope, product requirement, and the parameter of the equipment rack quantity in this processing step, inlet mill speed, frame and equipment is determined according to pass schedule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100910906A CN102228905A (en) | 2011-04-03 | 2011-04-03 | Production process of hot continuous rolling seamless steel tube with small caliber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100910906A CN102228905A (en) | 2011-04-03 | 2011-04-03 | Production process of hot continuous rolling seamless steel tube with small caliber |
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| CN102228905A true CN102228905A (en) | 2011-11-02 |
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| CN2011100910906A Pending CN102228905A (en) | 2011-04-03 | 2011-04-03 | Production process of hot continuous rolling seamless steel tube with small caliber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475453A (en) * | 2014-12-13 | 2015-04-01 | 太原磬泓机电设备有限公司 | Process and device for rolling continuously rolled seamless steel tubes |
| CN106180195A (en) * | 2016-08-31 | 2016-12-07 | 江苏天淮钢管有限公司 | 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process |
| CN106180208A (en) * | 2016-08-31 | 2016-12-07 | 江苏天淮钢管有限公司 | Across the set of specifications hot continuous rolling process away from seamless steel pipe |
| CN106216400A (en) * | 2016-08-03 | 2016-12-14 | 太原磬泓机电设备有限公司 | The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm |
| CN111282997A (en) * | 2020-02-17 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Heat-resistant seamless steel tube 12Cr1MoVG hot continuous rolling production method |
| CN114350923A (en) * | 2021-12-03 | 2022-04-15 | 包头钢铁（集团）有限责任公司 | Method for heating rare earth-containing 5Cr low-carbon medium alloy steel round pipe blank by adopting annular furnace |
-
2011
- 2011-04-03 CN CN2011100910906A patent/CN102228905A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475453A (en) * | 2014-12-13 | 2015-04-01 | 太原磬泓机电设备有限公司 | Process and device for rolling continuously rolled seamless steel tubes |
| CN106216400A (en) * | 2016-08-03 | 2016-12-14 | 太原磬泓机电设备有限公司 | The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm |
| CN106180195A (en) * | 2016-08-31 | 2016-12-07 | 江苏天淮钢管有限公司 | 508 millimeters of heavy caliber seamless steel pipe hot continuous rolling process |
| CN106180208A (en) * | 2016-08-31 | 2016-12-07 | 江苏天淮钢管有限公司 | Across the set of specifications hot continuous rolling process away from seamless steel pipe |
| CN111282997A (en) * | 2020-02-17 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Heat-resistant seamless steel tube 12Cr1MoVG hot continuous rolling production method |
| CN114350923A (en) * | 2021-12-03 | 2022-04-15 | 包头钢铁（集团）有限责任公司 | Method for heating rare earth-containing 5Cr low-carbon medium alloy steel round pipe blank by adopting annular furnace |
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Application publication date: 20111102 |