CN109351803A - The forming method of p-shaped steel pipe - Google Patents
The forming method of p-shaped steel pipe Download PDFInfo
- Publication number
- CN109351803A CN109351803A CN201811216533.8A CN201811216533A CN109351803A CN 109351803 A CN109351803 A CN 109351803A CN 201811216533 A CN201811216533 A CN 201811216533A CN 109351803 A CN109351803 A CN 109351803A
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- Prior art keywords
- passage
- step side
- forming
- steel pipe
- shaped steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The present invention relates to roll-forming technology field more particularly to a kind of forming methods of p-shaped steel pipe.Just one-step forming uses directly at square cold bending process plate in the forming method of p-shaped steel pipe comprising ten passages, straight sides are welded small side and the step side small edge forming of welding to 46 °~80 ° by first to third passage；4th to the 8th passage carries out straight sides waist cold roll forming according to 15 ° per pass of angle, the the 4th to the 8th passage carries out step side cold roll forming simultaneously, step side cold roll forming detailed process is, four-pass forms the first crimp recurvation of step side to 20 °~30 °, 5th to the 6th passage forms the second crimp of step side to 90 °, and the 7th to the 8th passage forms step side waist to 30 ° according to 15 ° per pass of angle；9th to the tenth passage forms straight sides waist and step side waist to 80 °~86 °.It can be realized p-shaped steel pipe using the forming method of p-shaped steel pipe of the invention precisely to form.
Description
Technical field
The present invention relates to roll-forming technology field more particularly to a kind of forming methods of p-shaped steel pipe.
Background technique
P-shaped steel pipe is exclusively used in bus frame manufacture, and traditional p-shaped steel pipe use is justified at square moulding process (as shown in Figure 1),
But further increasing with steel grade rank, traditional p-shaped steel pipe circle at square moulding process there are product cross section shapes cannot essence
Really molding, and there are problems that secondary operation hardening, secondary operation hardening phenomenon will increase the cracking risk of product use process,
Especially R Angle Position.And p-shaped steel pipe is special-shaped product, direct using routine can not achieve its precisely molding at square technique.
Summary of the invention
In order to solve the above problem, the object of the present invention is to provide a kind of forming method of p-shaped steel pipe, it can be realized p-shaped steel
Pipe precisely molding.
To achieve the above object, the forming method of the p-shaped steel pipe designed by the present invention, comprising steps of uncoiling, feeding, cutting
It cuts, butt welding, beat steel seal, plate just one-step forming, extruding soldering, cooling, sizing, aligning, sawing, collecting and baling, storage, feature
Be, just one-step forming includes directly ten passages at square cold bending process using directly at square cold bending process to the plate, first to
Third passage weld small edge forming process, and the 4th to the 8th passage carries out stepped portions molding procedure, and the 9th to the tenth
It is secondary to carry out closing molding procedure；Straight sides are welded small side (100) and the weldering of step side by clod wash unit to third passage by first
Small side (200) molding is connect to 46 °~80 °；4th to the 8th passage carries out straight sides waist according to 15 ° per pass of angle
(300) cold roll forming, while the 4th to the 8th passage carries out step side (400) cold roll forming, step side (400) cold roll forming tool
Body process is, four-pass forms step side the first crimp (401) recurvation to 20 °~30 °, and the 5th to the 6th passage is by step
The second crimp of side (402) molding to 90 °, the 7th to the 8th passage according to 15 ° per pass angle by step side waist (403) at
Type is to 30 °；9th to the tenth passage is by straight sides waist (300) and step side waist (403) molding to 80 °~86 °.
Preferably, described to be directly at the specific process of square cold bending process, first to third passage successively presses
Straight sides are welded into small (200) molding at (100) and small step side welding to 70 ° according to 14 °, 40 °, 70 ° of angle；4th
To the 8th passage according to 15 ° per pass angle carry out straight sides waist (300) cold roll forming, while the 4th to the 8th passage into
Row step side (400) cold roll forming, step side (400) cold roll forming detailed process be, four-pass is by the first crimp of step side
(401) recurvation is formed to 25 °, and the 5th passage forms the second crimp of step side (402) to 40 °, and the 6th passage is by step side the
To 90 °, the 7th to the 8th passage forms step side waist (403) extremely according to 15 ° per pass of angle for two crimps (402) molding
30°；9th passage forms straight sides waist (300) and step side waist (403) to 80 °, and the tenth passage is by straight sides waist
Portion (300) and step side waist (403) are formed to 86 °.
Preferably, the four-pass is crossed bent angle and is set using unilateral recurvation molding the first crimp of step side (401)
It is set to 3 °~5 °.The unilateral recurvation molding procedure of a time ensures that forming process is effective, reduces rebound, and compared to traditional 2 ° of mistakes
Bent angle, the present invention cross bent angle and cross bent angle greater than tradition, reduce rebound, guarantee effectively molding.
Preferably, the 4th to the 8th passage completes the molding of step side using oblique cutting roller pressure.
Preferably, the extruding soldering process uses four-roller fashion of extrusion, and lower roll is all made of the design of packet arc；Welding
Using asymmetric welding manner, the welding surplus of p-shaped pipe is 1.0~1.2 times of p-shaped thicknesss of pipe wall.The present invention is by squeezing soldering
The asymmetric Control Welding Process ability of Cheng Tigao, it is ensured that welding is stablized, using four-roller fashion of extrusion, it is ensured that the outer burr of steel band is without hole
Shape digs trace.
Preferably, the Sizing Process uses four sortie standard rollers and a sortie barrel-type roller composite sizing mode,
The sequence of arrangement is standard rollers, standard rollers, barrel-type roller, standard rollers, standard rollers.High-strength hardness of steel is high, after processing hardening, intensity liter
Height, rebound phenomenon aggravate, and effectively carry out size and plane by four sortie standard rollers and a sortie barrel-type roller composite sizing mode
Degree control.
Preferably, the straightening process is aligned using four-pass turks-head roll.Using four-pass Turkey
Head is aligned, and distortion value is reduced, it is ensured that torsion control.
Make the present invention has the advantages that compared to traditional p-shaped steel pipe circle at square moulding process (as shown in Figure 1), this hair
It is bright to use directly at square cold bending process (as shown in Figure 2).The preliminary formative stage of p-shaped steel pipe plectane material of the present invention is using three or five two one-tenth
Type method, specifically, 352 methods of forming are the stepped portions molding and two passages of the small edge forming of welding of three passages, five passages
Closing molding, pass through each passage profile angle control complete p-shaped steel pipe accurate molding.And there is only primary by the present invention
Processing hardening phenomenon avoids product quality risk caused by plasticity excessive loss.
Detailed description of the invention
Fig. 1 is traditional round into square process flow diagram；
Fig. 2 is the present invention directly at square process flow chart；
Fig. 3 is the roller floral diagram schematic diagram of the preliminary formative stage of plate in p-shaped forming method of steel pipe of the present invention；1~12 in figure
Indicate roll-in passage；
Fig. 4 is the deformation schematic diagram of each passage of the preliminary formative stage of plate in p-shaped forming method of steel pipe of the present invention；1 in figure
~12 indicate roll-in passage；
Fig. 5 is oblique cutting roller shaping schematic view in the preliminary formative stage of plate in p-shaped forming method of steel pipe of the present invention；
Fig. 6 is the schematic cross-section of p-shaped steel pipe of the present invention；Wherein, straight sides weld small side 100 and the welding of step side is small
Side 200, straight sides waist 300, step side 400 (the first crimp of step side 401, the second crimp of step side 402, step side waist
403), pad 500.
Specific embodiment
For a better understanding of the invention, invention is described in detail below with reference to drawings and concrete examples.
It is big with product cracking risk in the presence of cannot precisely form in existing high-intensitive p-shaped forming method of steel pipe technology to solve
The problem of, the present invention provides a kind of p-shaped forming method of steel pipe, and the preliminary formative stage of plate uses 352 methods of forming, specifically
Ground says, 352 methods of forming be the small edge forming of welding of three passages, the stepped portions molding of five passages and the closing of two passages at
Type controls the accurate molding for completing p-shaped steel pipe by each passage profile angle.It below will be by specific embodiment come to this
The preferred embodiment of the p-shaped forming method of steel pipe of invention is described in detail.
The forming method of p-shaped steel pipe, comprising steps of 1) uncoiling, 2) feeding, 3) shearing, 4) butt welding, 5) beat steel seal, 6) plate
7) the first one-step forming of material squeezes soldering, 8) cooling, 9) sizing, 10) aligning, 11) sawing, 12) collecting and baling, 13) storage；
In conjunction with shown in Fig. 3, Fig. 4, Fig. 6, just one-step forming includes 10 passages to step 6) plate, specific using 352 moldings
Method, 352 methods of forming are the stepped portions molding and the closing of two passages molding of the small edge forming of welding of three passages, five passages,
The tentatively molding angle control of plate is shown in Table 1:
Table 1
In nipping process, four-pass forms the first crimp of step side 401 using unilateral recurvation, crosses bent angle and is set as 4 °.
As shown in connection with fig. 5, the 4th to the 8th passage completes the molding of step side 400 using oblique cutting roller pressure.
In conjunction with shown in Fig. 3, Fig. 4, the 11st passage carries out the extruding soldering molding procedure of step 7), wherein in pad 500
It is welded, welding uses asymmetric welding manner.It squeezes in soldering forming process, is welded using four-roller fashion of extrusion,
Lower roll is designed using packet arc, improves asymmetric Control Welding Process ability, it is ensured that welding is stablized.The wherein welding surplus of p-shaped pipe
For 1.2 times of p-shaped thicknesss of pipe wall.
It squeezes after the completion of soldering forms to the progress step 8) cooling of p-shaped steel pipe to avoid quenched martensite generation, it is cooling to walk
Suddenly in such a way that air-cooled, water cooling combines.
Step 9) sizing is carried out to p-shaped steel pipe after the completion of cooling step, Sizing Process uses four sortie standard rollers and a frame
Secondary barrel-type roller composite sizing mode, the sequence of arrangement are standard rollers, standard rollers, barrel-type roller, standard rollers, standard rollers.Wherein cydariform
Roll crown is designed according to corresponding side length 10%.
Step 10) aligning is carried out to p-shaped steel pipe after the completion of sizing, straightening process is rectified using four-pass turks-head roll
Directly.Traditional two passage turks-head rolls aligning is distinguished, is aligned using four-pass turks-head roll, reduces distortion value, it is ensured that turned round
Turn control.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of forming method of p-shaped steel pipe, comprising steps of uncoiling, feeding, shearing, butt welding, beat steel seal, plate just one-step forming,
Squeeze soldering, cooling, sizing, aligning, sawing, collecting and baling, storage, which is characterized in that just one-step forming uses directly the plate
The side's of being connected into cold bending process includes directly ten passages at square cold bending process, and first to third passage carries out welding small edge forming work
Sequence, the 4th to the 8th passage carry out stepped portions molding procedure, and the 9th to the tenth passage carries out closing molding procedure；First to
Straight sides are welded small (200) molding when (100) and step side weld small to 46 °~80 ° by clod wash unit by three passages；The
Four to the 8th passages carry out straight sides waist (300) cold roll forming, while the 4th to the 8th passage according to 15 ° per pass of angle
Step side (400) cold roll forming is carried out, step side (400) cold roll forming detailed process is that four-pass is curved by step side first
Side (401) recurvation is formed to 20 °~30 °, and the 5th to the 6th passage forms the second crimp of step side (402) to 90 °, the 7th to
8th passage forms step side waist (403) to 30 ° according to 15 ° per pass of angle；9th to the tenth passage is by straight sides
Waist (300) and step side waist (403) molding are to 80 °~86 °.
2. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: described directly at square cold bending process
Specific process is, straight sides are successively welded small side (100) and platform according to 14 °, 40 °, 70 ° of angle by first to third passage
It welds small side (200) and forms to 70 ° in rank side；4th to the 8th passage carries out straight sides waist according to 15 ° per pass of angle
(300) cold roll forming, while the 4th to the 8th passage carries out step side (400) cold roll forming, step side (400) cold roll forming tool
Body process is, four-pass forms step side the first crimp (401) recurvation to 25 °, and the 5th passage is by the second crimp of step side
(402) molding is to 40 °, and the 6th passage forms the second crimp of step side (402) to 90 °, and the 7th to the 8th passage is according to per pass
Secondary 15 ° of angle forms step side waist (403) to 30 °；9th passage is by straight sides waist (300) and step side waist
(403) to 80 °, the tenth passage forms straight sides waist (300) and step side waist (403) to 86 ° for molding.
3. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: the four-pass is using unilateral anti-
The first crimp of roll forming step side (401) crosses bent angle and is set as 3 °~5 °.
4. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: the 4th to the 8th passage uses
Oblique cutting roller pressure completes step side (400) molding.
5. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: the extruding soldering process uses four
Roller fashion of extrusion, lower roll are all made of the design of packet arc；Welding uses asymmetric welding manner, and the welding surplus of p-shaped steel pipe is 1.0~
1.2 times of p-shaped thicknesss of pipe wall.
6. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: the Sizing Process uses four sorties
Standard rollers and a sortie barrel-type roller composite sizing mode, the sequence of arrangement are standard rollers, standard rollers, barrel-type roller, standard rollers, standard
Roller.
7. the forming method of p-shaped steel pipe according to claim 1, it is characterised in that: the straightening process uses four-pass
Turks-head roll is aligned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216533.8A CN109351803B (en) | 2018-10-18 | 2018-10-18 | Forming method of P-shaped steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216533.8A CN109351803B (en) | 2018-10-18 | 2018-10-18 | Forming method of P-shaped steel pipe |
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| CN109351803A true CN109351803A (en) | 2019-02-19 |
| CN109351803B CN109351803B (en) | 2020-05-12 |
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| CN201811216533.8A Active CN109351803B (en) | 2018-10-18 | 2018-10-18 | Forming method of P-shaped steel pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998303A (en) * | 2019-04-20 | 2019-07-12 | 南京世岐货架型材制造有限公司 | Lock seaming formula p-type beam and molding machine |
| CN113118231A (en) * | 2021-04-21 | 2021-07-16 | 中冶赛迪技术研究中心有限公司 | General process for closed-end steel hot roll bending production |
| CN113579658A (en) * | 2021-08-06 | 2021-11-02 | 四川攀钢嘉德精工科技有限公司 | Steel plate deformation process |
| CN113967672A (en) * | 2021-09-30 | 2022-01-25 | 武汉钢铁江北集团冷弯型钢有限公司 | Forming method of steel pipe with right trapezoid section |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109998303A (en) * | 2019-04-20 | 2019-07-12 | 南京世岐货架型材制造有限公司 | Lock seaming formula p-type beam and molding machine |
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| CN113118231A (en) * | 2021-04-21 | 2021-07-16 | 中冶赛迪技术研究中心有限公司 | General process for closed-end steel hot roll bending production |
| CN113579658A (en) * | 2021-08-06 | 2021-11-02 | 四川攀钢嘉德精工科技有限公司 | Steel plate deformation process |
| CN113579658B (en) * | 2021-08-06 | 2023-10-17 | 四川攀钢嘉德精工科技有限公司 | Steel plate deformation process |
| CN113967672A (en) * | 2021-09-30 | 2022-01-25 | 武汉钢铁江北集团冷弯型钢有限公司 | Forming method of steel pipe with right trapezoid section |
| CN113967672B (en) * | 2021-09-30 | 2023-08-29 | 武汉钢铁江北集团冷弯型钢有限公司 | Forming method of right trapezoid-section steel pipe |
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| CN109351803B (en) | 2020-05-12 |
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