CN106181263A - A kind of minor diameter big wall thickness pipe drawing method - Google Patents
A kind of minor diameter big wall thickness pipe drawing method Download PDFInfo
- Publication number
- CN106181263A CN106181263A CN201610705307.0A CN201610705307A CN106181263A CN 106181263 A CN106181263 A CN 106181263A CN 201610705307 A CN201610705307 A CN 201610705307A CN 106181263 A CN106181263 A CN 106181263A
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- CN
- China
- Prior art keywords
- pipe
- steel plate
- wall thickness
- drawing method
- minor diameter
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
A kind of minor diameter big wall thickness pipe drawing method, according to the size of pipe diameter unfolding calculation sheet stock, adds the reserved limit of certain length respectively at two ends after determining the Theoretical Calculation size of blanking；The steel plate completing blanking diametrically expansion direction carries out N decile according to data such as calculating pressure, and the division points of length unwrapping wire is linked to be straight line, as the datum line cut out when pressing；Once carry out cutting out pressure according to the bisector drawn before to the steel plate preheated, after being pressed into semi-circular shape, suppress second half until the length that pipe diametric(al) is launched all is pressed into circular arc state；Pipe longitudinal joint and periphery place are heated with uniform temperature, eliminates welding and the internal stress of folding circular tube mouth two ends extruding generation；Pipe weldering after completing heat treatment carries out Non-Destructive Testing by code requirement.The present invention can reach the performance indications ensureing pipe, the linearity of pipe and ovality, and reduces welding capacity, it is ensured that the beneficial effect of the dimensional accuracy of finished product pipe.
Description
Technical field
The invention belongs to pipe compact technique field, particularly relate to a kind of minor diameter big wall thickness pipe drawing method.
Background technology
Self-lifting type marine drilling platform cylindrical shape spud leg, is designed as cylindrical structure.This inside configuration does not has any support to tie
Structure, the pin hole that the lifting of hull relies on spud leg cylinder progressively lifts, and the weight of whole piece ship concentrates on pile leg structure
On cylinder.For making platform have enough strength and stiffness in lifting process, therefore to the intensity of spud leg steel-tube construction with just
Degree has the requirement that comparison is high.Due to the design structure of marine drilling platform cylindrical shape spud leg, used by spud leg, the diameter of pipe is less
(1m) wall thickness of steel pipe thicker (more than 60mm), this physical dimension is bigger for the difficulty of processing of pipe.General minor diameter
The making of thick-walled pipe uses double semicircle to dock, and mating operation amount is very big, and compact dimensions precision and quality all can not be very
Good meets the spud leg prescription to pipe.
Summary of the invention
The present invention provides a kind of minor diameter big wall thickness pipe drawing method, can reach the performance indications ensureing pipe, pipe
Linearity and ovality, and reduce welding capacity, it is ensured that the beneficial effect of the dimensional accuracy of finished product pipe.
Technical problem solved by the invention realizes by the following technical solutions: the present invention provides a kind of big wall of minor diameter
Thick pipe drawing method, its step is as follows:
According to the size of pipe diameter unfolding calculation sheet stock, determine after the Theoretical Calculation size of blanking at two ends
Add the reserved limit of certain length respectively；The steel plate completing blanking diametrically expansion direction carries out N according to data such as calculating pressure
Decile, is linked to be straight line by the division points of length unwrapping wire, as the datum line cut out when pressing；
With uniform temperature, steel plate is carried out the pre-heat treatment before compaction, on the premise of not destroying the original mechanical performance of steel plate
Play the effect softening steel plate；
Once carry out cutting out pressure, after being pressed into semi-circular shape according to the bisector drawn before to the steel plate preheated
Suppress second half length launched until pipe diametric(al) and be all pressed into circular arc state, the reserved limit reserved by two ends before
Excision, has been processed pipe longitudinal seam welding groove, has completed the pre-stamped molding of pipe；
The pipe closed up in advance is carried out at a certain temperature overall heat treated；Roller is used at the two ends closing up mouth
Uniformly the two ends closing up mouth are extruded, make to close up mouthful two ends and fully come together, the longitudinal joint being brought together into together is carried out spot welding
Fixing；
Pipe longitudinal joint and periphery place are heated with uniform temperature, carries out at heat at the welding seams of round pipe welded
Reason, eliminates welding and the internal stress of folding circular tube mouth two ends extruding generation；
Pipe weldering after completing heat treatment carries out Non-Destructive Testing by code requirement.
Particularly, a length of the 100～150mm of described reserved limit.
Particularly, described steel plate carries out the temperature of the pre-heat treatment in the range of 200～250 DEG C.
Particularly, the temperature of the described pre-pipe entirety heat treated closed up is about 250 DEG C.
Particularly, the heating-up temperature of described pipe longitudinal joint is about 120 DEG C.
The invention have the benefit that
The invention can ensure that the performance indications of pipe, the linearity of pipe and ovality, and reduce welding capacity, it is ensured that finished product
The dimensional accuracy of pipe.
Detailed description of the invention
Hereinafter the present invention is described further:
Embodiment:
According to the size of pipe diameter unfolding calculation sheet stock, determine after the Theoretical Calculation size of blanking at two ends
One section adds 100～the reserved limit of 150mm, cannot be pressed into the problem of arc for solving edge when pressure cut out by steel plate, complete blanking
Steel plate diametrically expansion direction carry out N equal portions, divide and obtain dividing, by length unwrapping wire according to data such as calculating pressure
Division points is linked to be straight line, as the datum line cut out when pressing；
Owing to the mechanical property of materials of pressing circular tubes is stronger, and thickness is bigger, and using room temperature to carry out compacting may
The defect such as cracking, steel plate carries out the pre-heat treatment before compaction, preheating temperature controls in the range of 200～250 DEG C, not
The effect softening steel plate is played on the premise of destroying the original mechanical performance of steel plate；
Once carry out cutting out pressure according to the bisector drawn before to the steel plate preheated, cut out the pressure of pressure according to calculating institute
, after being pressed into semi-circular shape, suppress second half until the length of pipe diametric(al) expansion is all pressed into circular arc state and is
Only, the reserved limit of reserved for two ends before 100～150mm is excised, pipe longitudinal seam welding groove has been processed,
Complete the pre-stamped molding of pipe；
Cutting out pressure mode owing to pipe compacting uses, pipe diameter is less, and cutting out pressure device cannot complete inside pipe, is justifying
After pipe pre-molding, longitudinal direction at pipe is closed up and can be there is a consistent gap of width at mouth, by the circle closed up in advance
Pipe carries out overall heat treated and temperature is heated to about 250 DEG C uses pair of rollers to close up mouth uniformly at the two ends closing up mouth
Two ends extrude, and make to close up mouthful two ends and fully come together, except closing up the longitudinal joint making pipe during this closes up
Can also adjust outward and close up the ovality of pipe and be adjusted, it is ensured that the dimensional accuracy that pipe is compressing, one will be brought together into
The longitudinal joint risen carries out spot welding to be fixed；
Owing to the wall ratio of pipe is relatively big, the longitudinal seam welding amount of pipe is very big, pipe during for avoiding pipe longitudinal seam welding
It is deformed, needs pipe longitudinal joint and periphery place are heated in addition to pipe is fixed, heating and temperature control 120 DEG C
Left and right, to carrying out heat treatment at the welding seams of round pipe welded, eliminates welding and the planted agent of folding circular tube mouth two ends extruding generation
Power, it is ensured that overall dimensions after shaping round tube, it is ensured that the end product quality of pipe；
Pipe weldering after completing heat treatment carries out Non-Destructive Testing by code requirement.
Above by embodiment, the present invention is described in detail, but described content has been only the preferable enforcement of the present invention
Example, it is impossible to be considered the practical range for limiting the present invention.All technical solutions according to the invention that utilize, or the skill of this area
Art personnel, under the inspiration of technical solution of the present invention, design similar technical scheme and reach above-mentioned technique effect, or
Impartial change and the improvement etc. being made application range, all should still belong within the patent of the present invention contains protection domain.
Claims (5)
1. a minor diameter big wall thickness pipe drawing method, it is characterised in that: its step is as follows:
According to the size of pipe diameter unfolding calculation sheet stock, distinguish at two ends after determining the Theoretical Calculation size of blanking
Add the reserved limit of certain length；The steel plate completing blanking diametrically expansion direction carries out N decile according to data such as calculating pressure,
The division points of length unwrapping wire is linked to be straight line, as the datum line cut out when pressing；
With uniform temperature, steel plate is carried out the pre-heat treatment before compaction, play on the premise of not destroying the original mechanical performance of steel plate
Soften the effect of steel plate；
Once carry out cutting out pressure according to the bisector drawn before to the steel plate preheated, suppress after being pressed into semi-circular shape
The reserved limit that two ends before are reserved, until the length that pipe diametric(al) is launched all is pressed into circular arc state, is cut by second half
Remove, pipe longitudinal seam welding groove has been processed, complete the pre-stamped molding of pipe；
The pipe closed up in advance is carried out at a certain temperature overall heat treated；Use roller uniform at the two ends closing up mouth
The two ends closing up mouth are extruded, make to close up mouthful two ends and fully come together, the longitudinal joint being brought together into together is carried out spot welding and fixes；
Pipe longitudinal joint and periphery place are heated with uniform temperature, carry out heat treatment at the welding seams of round pipe welded,
Eliminate welding and the internal stress of folding circular tube mouth two ends extruding generation；
Pipe weldering after completing heat treatment carries out Non-Destructive Testing by code requirement.
A kind of minor diameter big wall thickness pipe drawing method the most according to claim 1, it is characterised in that: described reserved limit
A length of 100～150mm.
A kind of minor diameter big wall thickness pipe drawing method the most according to claim 1, it is characterised in that: described steel plate is carried out
The temperature of the pre-heat treatment is in the range of 200～250 DEG C.
A kind of minor diameter big wall thickness pipe drawing method the most according to claim 1, it is characterised in that: described pre-close up
The temperature of the pipe entirety heat treated become is about 250 DEG C.
A kind of minor diameter big wall thickness pipe drawing method the most according to claim 1, it is characterised in that: described pipe longitudinal joint
Heating-up temperature be about 120 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705307.0A CN106181263A (en) | 2016-08-23 | 2016-08-23 | A kind of minor diameter big wall thickness pipe drawing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705307.0A CN106181263A (en) | 2016-08-23 | 2016-08-23 | A kind of minor diameter big wall thickness pipe drawing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106181263A true CN106181263A (en) | 2016-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610705307.0A Pending CN106181263A (en) | 2016-08-23 | 2016-08-23 | A kind of minor diameter big wall thickness pipe drawing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106181263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014796A (en) * | 2018-09-18 | 2018-12-18 | 哈尔滨锅炉厂有限责任公司 | Large capacity suppresses drum thickness tile manufacturing method |
-
2016
- 2016-08-23 CN CN201610705307.0A patent/CN106181263A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014796A (en) * | 2018-09-18 | 2018-12-18 | 哈尔滨锅炉厂有限责任公司 | Large capacity suppresses drum thickness tile manufacturing method |
| CN109014796B (en) * | 2018-09-18 | 2020-07-10 | 哈尔滨锅炉厂有限责任公司 | Method for manufacturing large-capacity pressed thick boiler barrel tile |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |