CN106734668A - A kind of seamless steel pipe hot-expanding pipe processing method and hot tube expanding machine core print - Google Patents
A kind of seamless steel pipe hot-expanding pipe processing method and hot tube expanding machine core print Download PDFInfo
- Publication number
- CN106734668A CN106734668A CN201710043885.7A CN201710043885A CN106734668A CN 106734668 A CN106734668 A CN 106734668A CN 201710043885 A CN201710043885 A CN 201710043885A CN 106734668 A CN106734668 A CN 106734668A
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- Prior art keywords
- hot
- pipe
- thermal expansion
- expanding
- steel pipe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
Abstract
The invention discloses a kind of seamless steel pipe hot-expanding pipe processing method and the thermal expansion machine core print for realizing the hot-expanding pipe, method comprises the following steps：First, select mother tube and material chemical component, outward appearance and dimension control are carried out to it, mother tube is 20# using steel grade；2nd, thermal expansion：800 830 DEG C of thermal expansion temperature, 50 ± 10mm/min of thermal expansion speed；3rd, follow-up finishing, product inspection, storage.Mother tube main pipe selects Φ 426mm × 19.5mm, is 1120 × 15mm of Φ after thermal expansion.Hot tube expanding machine core print includes：Core bar adpting flange, material feeding region, reducing district, sizing area, Runout area and guide portion, the inlet diameter size of material feeding region is Ф 670mm, and the length of reducing district is 1185mm, taper angle is 10 °, and the diameter dimension of sizing area is Ф 1088mm.The beneficial effects of the invention are as follows：Outer diameter of steel pipes is become big in the short period of time, nonstandard, special type seamless pipe can be produced, and cost is relatively low, production efficiency is high, meets the heavy caliber seamless steel pipe of demand.
Description
Technical field
The present invention relates to seamless steel pipe field, more particularly to a kind of seamless steel pipe hot-expanding pipe method and hot tube expanding machine.
Background technology
Hot-expanding steel tube is exactly the hot-expanding pipe that we often say, but density ratio is relatively low to shrink very strong.Thermal expansion is one kind of steel pipe
Processing mode, is that small-caliber steel pipe is processed into large-diameter steel pipe.Hot-expanding steel tube is a kind of steel pipe by expanding pipe diameter
Molding procedure, generally use oblique milling thermal expansion technique, will be heated to the rolled piece of proper temperature with produced by thermal expansion technique
Steel pipe.
Hot-expanding steel tube specifications and models randomness usually makes, using corresponding heat than larger according to the need for client
Pipe expander.Such as disclosed in China Patent No. ZL2011100720687 a kind of seamless steel pipe thermal expansion process and hot tube expanding machine, there is provided
Be capable of continuous automatic production, the technique of production efficiency and product quality be significantly provided, and including frame, rise and fall roller, after
The hot tube expanding machine of platform carriage device, locking clamping device etc..
Because steel mill's seamless steel pipe specification is limited, it is impossible to meet supply needs of the terminal consumer to large-diameter steel pipe, but
It is that wall thickness is thin, and production difficulty is very big because outer diameter of steel pipes is big.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of outer diameter of steel pipes greatly, the thin nonstandard seamless steel pipe thermal expansion of wall thickness
Pipe processing technique and hot tube expanding machine core print.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of seamless steel pipe hot-expanding pipe processing side
Method, comprises the following steps：First, select mother tube and material chemical component, outward appearance and dimension control, the mother tube are carried out to it
The use of steel grade is 20#；2nd, thermal expansion：800-830 DEG C of thermal expansion temperature, 50 ± 10mm/min of thermal expansion speed；3rd, follow-up finishing, finished product
Inspection, storage：Steel pipe sampling censorship → flush end → size original inspection → flaw detection → survey is long, spray mark, inner support → final finished inspection
Test → qualified steel pipe storage.
The mother tube main pipe selects Φ 426mm × 19.5mm, is 1120 × 15mm of Φ after thermal expansion.
The dimension control of the step one is that every 50mm pipe ranges select a section, and 8 points of each section gauge determine net
Ruling is measured.
Main pipe outer diameter tolerance needs to meet ± 1%, and wall thickness tolerance need to reach-9-﹢ 12.5%.
A kind of hot tube expanding machine core print for manufacturing seamless steel pipe hot-expanding pipe, including：Core bar adpting flange, material feeding region, reducing district,
Sizing area, Runout area and guide portion, the inlet diameter size of the material feeding region is Ф 670mm, and the length of the reducing district is
1185mm, taper angle are 10 °, and the diameter dimension of the sizing area is Ф 1088mm.
The beneficial effects of the invention are as follows：Outer diameter of steel pipes is become big in the short period of time, can produce nonstandard, special type
Seamless pipe, and cost is relatively low, production efficiency is high, meets the heavy caliber seamless steel pipe of demand.
Brief description of the drawings
Fig. 1 is core head structure schematic diagram of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
A kind of 1120 × 15mm of Φ seamless steel pipes thermal expansion process step one of the invention：Selection mother tube simultaneously carries out original to it
Material chemical composition, outward appearance and dimension control.Selection is No. 20 steel using steel grade, and the main pipe of Φ 426mm × 19.5mm is raw material, former
Material physical dimension and surfaces externally and internally requirement are as follows：
(1) by kind of calliper, outer diameter tolerance needs satisfaction ± 1%D.
(2) measured using calibrator, a section is selected per 50mm pipe ranges, 8 points of each section gauge determine grid lines
Measure, wall thickness tolerance need to reach-9-﹢ 12.5%S.
(3) by hand inspection, surfaces externally and internally is without the defect such as scuffing and crackle.
Requirements above carries out next process after meeting, wherein：D refers to external diameter, and S refers to wall thickness.Step 2：By thermal expansion
Technique, reducing makes mother tube by 426 × 19.5mm of Φ thermal expansions to 1120 × 15mm of Φ.Step 3：Follow-up finishing, product inspection,
Storage.Mother tube examination → material chemical component, outward appearance and dimension control → thermal expansion → sampling censorship → flush end → size initial survey
Test → detect a flaw → survey long, spray mark, inner support → final finished inspection → qualified steel pipe storage.
Realize a kind of core print instrument system of 1120 × 15mm of the Φ seamless steel pipes thermal expansion process of the invention using hot tube expanding machine
It is fixed.(1) core print design：1) entrance opening dimension：Ф 670mm, 2) sizing diameter dimension：Ф 1088mm, 3) reducing section length：About
1185mm, taper angle is 10 °.
(2) coil design：1) internal diameter size：Ф 1270mm, 2) loop length：1600mm.
Claims (5)
1. a kind of seamless steel pipe hot-expanding pipe processing method, comprises the following steps：First, select mother tube and raw material chemistry is carried out to it
Composition, outward appearance and dimension control, the mother tube are 20# using steel grade；2nd, thermal expansion：800-830 DEG C of thermal expansion temperature, thermal expansion speed
50 ± 10mm/min of degree；3rd, follow-up finishing, product inspection, storage：Steel pipe sampling censorship → flush end → size original inspection → flaw detection
→ survey long, spray mark, inner support → final finished inspection → qualified steel pipe storage.
2. a kind of seamless steel pipe hot-expanding pipe processing method according to claim 1, it is characterized in that：The mother tube main pipe choosing
It is 1120 × 15mm of Φ after thermal expansion with Φ 426mm × 19.5mm.
3. a kind of seamless steel pipe hot-expanding pipe processing method according to claim 1, it is characterized in that：The size of the step one
Inspection is that every 50mm pipe ranges select a section, and 8 points of each section gauge determine that grid lines is measured.
4. a kind of seamless steel pipe hot-expanding pipe processing method according to claim 2, it is characterized in that：Main pipe outer diameter tolerance need to expire
Foot ± 1%, wall thickness tolerance need to reach-9-﹢ 12.5%.
5. it is a kind of manufacture seamless steel pipe hot-expanding pipe hot tube expanding machine core print, including：Core bar adpting flange (1), material feeding region (2), change
Footpath area (3), sizing area (4), Runout area (5) and guide portion (6), it is characterized in that：The inlet diameter size of the material feeding region (2) is
Ф 670mm, the length of the reducing district is 1185mm, taper angle is 10 °, and the diameter dimension of the sizing area (4) is Ф
1088mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043885.7A CN106734668A (en) | 2017-01-19 | 2017-01-19 | A kind of seamless steel pipe hot-expanding pipe processing method and hot tube expanding machine core print |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710043885.7A CN106734668A (en) | 2017-01-19 | 2017-01-19 | A kind of seamless steel pipe hot-expanding pipe processing method and hot tube expanding machine core print |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106734668A true CN106734668A (en) | 2017-05-31 |
Family
ID=58945187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710043885.7A Pending CN106734668A (en) | 2017-01-19 | 2017-01-19 | A kind of seamless steel pipe hot-expanding pipe processing method and hot tube expanding machine core print |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106734668A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004024575A1 (en) * | 2004-05-18 | 2005-12-15 | Daimlerchrysler Ag | Tube expansion tool has two-part expansion lance making contact with the tube via a deformation element |
| JP2010075989A (en) * | 2008-09-29 | 2010-04-08 | Jfe Steel Corp | Device for monitoring bead position of uoe steel pipe |
| CN102189187A (en) * | 2011-03-22 | 2011-09-21 | 德新钢管（中国）有限公司 | Manufacturing process of thermal expansion diameter duplex seamless stainless steel pipe |
| CN102251749A (en) * | 2011-05-26 | 2011-11-23 | 天津钢管集团股份有限公司 | Phi 406-phi 130 large-caliper petroleum casing pipe variable-diameter joint and manufacturing method thereof |
| CN104259331A (en) * | 2014-07-31 | 2015-01-07 | 天津钢管集团股份有限公司 | Production method of phi 512 mm*37 mm high-grade steel coupling blanks |
-
2017
- 2017-01-19 CN CN201710043885.7A patent/CN106734668A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004024575A1 (en) * | 2004-05-18 | 2005-12-15 | Daimlerchrysler Ag | Tube expansion tool has two-part expansion lance making contact with the tube via a deformation element |
| JP2010075989A (en) * | 2008-09-29 | 2010-04-08 | Jfe Steel Corp | Device for monitoring bead position of uoe steel pipe |
| CN102189187A (en) * | 2011-03-22 | 2011-09-21 | 德新钢管（中国）有限公司 | Manufacturing process of thermal expansion diameter duplex seamless stainless steel pipe |
| CN102251749A (en) * | 2011-05-26 | 2011-11-23 | 天津钢管集团股份有限公司 | Phi 406-phi 130 large-caliper petroleum casing pipe variable-diameter joint and manufacturing method thereof |
| CN104259331A (en) * | 2014-07-31 | 2015-01-07 | 天津钢管集团股份有限公司 | Production method of phi 512 mm*37 mm high-grade steel coupling blanks |
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Application publication date: 20170531 |
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