CN107363138A - Elbow with straight section die forming method - Google Patents
Elbow with straight section die forming method Download PDFInfo
- Publication number
- CN107363138A CN107363138A CN201710705851.XA CN201710705851A CN107363138A CN 107363138 A CN107363138 A CN 107363138A CN 201710705851 A CN201710705851 A CN 201710705851A CN 107363138 A CN107363138 A CN 107363138A
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- CN
- China
- Prior art keywords
- elbow
- blank
- straight section
- mould
- die
- Prior art date
- 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.)
- Pending
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Classifications
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/08—Bending tubes using mandrels or the like in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/04—Bending tubes using mandrels or the like the mandrel being rigid
Abstract
Elbow with straight section die forming method, step are as follows：(1) blanking；(2) inner side shapes；(3) shaped on the outside of both ends；(4) clout, finished edge are cut off.The mode that the present invention shapes mainly by carrying out molding aligning to its both ends with the elbow of industrialized production, obtains elbow with straight section, product does not crease easily in production process, and quality is good, is not required to the size that shaping can reach requirement.Mould is simple, reduces die cost, and production process manually participates in few, saving labor cost.Production yield rate is high, reduces product cost.
Description
Technical field is the present invention relates to a kind of die forming method, particularly for band in the steam-water pipe of thermal power plant
The die forming method of straight section seamless elbow.
Background technology is as the industry such as the fast development of China's economy, ship, petrochemical industry, electric power is to manufacturing equipment matter
The requirement of amount is constantly lifted, and demand is also continuing to increase.And pipeline transportation is as conveying gaseous state, liquid in many manufacturing equipments
Or one of indispensable mode such as hybrid particles, and be used widely.For pipeline transportation, elbow is because that can change
One of pipeline direction, the essential connector pipe fitting turned into, while be also the maximum pipe fitting of dosage, account for pipe fitting dosage
More than 80%.
Because material is in factors such as pipeline interior edge tube runs, corner is set to be also easy to produce larger stress concentration.For without
For the common elbow of straight section, welding groove positional distance corner is nearer, weld stress increase is easily caused pipeline
Destroy.
Replace common elbow can to avoid this problem with straight section elbow, not only increase the validity period of pipeline
Limit, and the security of pipeline is also add, this is also to be badly in need of in actual production.
At present, the elbow with straight section mode of production mainly has butt welding shaping, compressing, three kinds of cast form.Butt welding shapes
Because of the presence of weld seam, elbow is set to be only used for the transport of operating on low voltage environment；It is compressing in pressing process, mould passes through pressure
Roughcast middle position, make to turn into Main Deformation at this, easily wrinkled at inner arc and outer arc, be only applicable to produce size compared with
Small elbow；Cast form is because easily there is the defects of shrinkage porosite, sand holes, slag inclusion, while the power of casting elbow caused by casting in itself
Learn the requirement that performance does not reach some special industries such as steam power plant yet.
The content of the invention is easy to operate it is an object of the invention to provide a kind of mould is simple, and production efficiency is high, production
The measured elbow with straight section manufacturing process of quality.
The step of elbow with straight section die forming method, is as follows：
1st, blanking
Blank is used as by the use of the elbow of the identical inside nominal diameter of industrialized production, external diameter and bending radius.According to blank
The arc length of longitudinal section and intersection on the inside of outer surface is equal to elbow with straight section longitudinal section with the length of intersection on the inside of outer surface plus curved
The allowance of head both ends car groove, can try to achieve blank angle.In addition, blank is added according to the tonnage big I of equipment
Heat, or shape at room temperature.
2nd, inner side shapes
Blank is symmetrically placed on the lower mould of pressure setting, upper mould, which moves downward, makes inner surface and upper mould mould outside blank
Chamber is contacted, and continues traveling downwardly blank and is plastically deformed, and with lower mould matched moulds, outside inner surface is closely attached on mould die cavity,
Both ends form straight section under its effect on the inside of blank.Upper mould keeps the constant carry out subsequent processing in position with lower mould closure.
3rd, shaped on the outside of both ends
Two plugs are respectively along two of its mold cavity both ends face of cylinder central axis push-in blank after upper die and lower die matched moulds
End is internal, makes to be deformed into straight section on the outside of blank.Two plugs retract original position afterwards, and mold returns to original position, by elbow from mould
Middle taking-up.
4th, clout, finished edge are cut off
The unnecessary blank in elbow both ends is removed according to standard vehicle, car goes out groove and completes whole process.
It is solid that pressure setting of the present invention mainly includes master cylinder fixed plate, supporting plate A, the fixed plate of secondary cylinder I, secondary cylinder II
Fixed board, supporting plate B, frame, secondary cylinder I, secondary cylinder II, master cylinder, upper mould fixed plate, upper die and lower die fixed plate, lower mould, plug I and core
Rod II.
Lower mould is bolted the top of lower mold fixed plate, then lower mold fixed plate is crossed and is bolted in frame.
The lower end of plug I and plug II respectively with secondary cylinder I and secondary cylinder II is fixedly connected.Set respectively on secondary cylinder I, secondary cylinder II
There are the fixed plate of secondary cylinder I and the fixed plate of secondary cylinder II for being fixedly connected, fixed with bolt by the secondary fixed plate of cylinder I and secondary cylinder II
Plate, secondary cylinder I, secondary cylinder II are fixed in supporting plate A, B respectively.Supporting plate A, B is separately fixed at the both ends of frame again.
Upper mould is bolt-connected to the bottom of upper mould fixed plate.Upper mould fixed plate again with the lower end of master cylinder by bolt or
Screw rod achieves a fixed connection.Master cylinder is provided with master cylinder fixed plate, then master cylinder fixed plate is fixedly attached in frame by bolt.
After upper die and lower die matched moulds, the outer surface of its one elbow with straight section of mold cavity surface composition, upper die and lower die
Die joint be that gained curved surface is stretched along perpendicular to its longitudinal section direction with the central axis of above-mentioned elbow with straight section outer surface.On
The cavity mold surface of mould is the elbow with straight section outer surface medial type face, and the cavity mold surface chi of lower mould is outside the elbow with straight section
Outer side surface type face.The outer surface type face of elbow with straight section of the upper die and lower die cavity mold surface size with shaping is consistent, except both ends
The face of cylinder along central axis direction length it is longer beyond.Upper die and lower die cavity mold surface both ends face of cylinder length should ensure that whole after matched moulds
Individual blank is completely in the die cavity of upper die and lower die.Secondary cylinder I, the axis of secondary cylinder II are respectively with master cylinder into same angular
Degree, the angle are the half of the angle of the elbow finally shaped.Pressure setting can realize in same plane three directions
Motion.Three directions are all respectively：Vertical direction and point its both sides is arranged therewith into the both direction of equal angular, three directions
Extended line is met at a bit.The power set of the motion in three directions can be hydraulic station liquid feeding cylinder pressure, electric cylinder etc..The He of plug I
Plug II is cylindrical forward with the transitions such as chamfering or fillet, the public affairs of the diameter and shaping elbow of plug I and plug II
Claim latus rectum identical.
The present invention has advantages below compared with prior art：
1. the mode that the present invention shapes mainly by carrying out molding aligning to its both ends with the elbow of industrialized production, obtains
Elbow with straight section, product does not crease easily in production process, and quality is good, is not required to the size that shaping can reach requirement.
2. mould is simple, die cost is reduced, production process manually participates in few, saving labor cost.
3. production yield rate is high, product cost is reduced.
Brief description of the drawings
Fig. 1 is the integrally-built axonometric drawing of the present invention；
Fig. 2 is blank front view；
Fig. 3 is the front view of elbow with straight section；
Fig. 4 is integrally-built front view when being just put into tubing blank in Fig. 1；
Fig. 5 is front view when shaping is completed on the inside of blank in Fig. 1；
Fig. 6 be Fig. 1 in when in blank outside shaping complete when front view.
In figure：1st, frame；2nd, secondary cylinder I；3rd, lower mould；4th, master cylinder；5th, upper mould fixed plate；6th, upper mould；7th, plug I；8th, blank；
9th, plug II；10th, secondary cylinder II；11st, lower mold fixed plate；12nd, elbow with straight section；13rd, supporting plate A；14th, supporting plate B；15th, secondary cylinder I
Fixed plate；16th, the secondary fixed plate of cylinder II；17th, master cylinder fixed plate.A, B represents two of intersection on the inside of blank longitudinal section and outer surface
End points.C, D represents elbow with straight section longitudinal section and two end points of intersection on the inside of outer surface, and E, F represent that elbow with straight section is vertical and cut
Face and two point of contacts of arc section and straightway in intersection on the inside of outer surface.
Embodiment
In the simplified schematic diagram of the invention shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, pressure setting mainly includes master
Cylinder fixed plate, supporting plate A, the fixed plate of secondary cylinder I, the fixed plate of secondary cylinder II, supporting plate B, frame, secondary cylinder I, secondary cylinder II, master cylinder, upper mould
Fixed plate, upper die and lower die fixed plate, lower mould, plug I and plug II.
Lower mould 3 is bolted the top of lower mold fixed plate 11, then lower mold fixed plate 11 is crossed and is bolted to machine
On frame 1.
The lower end of plug I 7 and plug II 9 respectively with secondary cylinder I 2 and secondary cylinder II 10 is connected.Divide on secondary cylinder I 2, secondary cylinder II 10
The fixed plate 15 of secondary cylinder I and the fixed plate 16 of secondary cylinder II of fixed-link She You be used for, pass through the secondary fixed plate 15 of cylinder I and pair with bolt
The fixed plate 16 of cylinder II, secondary cylinder I 2, secondary cylinder II 10 are fixed on supporting plate A13 and supporting plate B14.Supporting plate A13 and supporting plate
B14 is separately fixed at the both ends of frame 1 again.
Upper mould 6 is bolt-connected to the bottom of upper mould fixed plate 5.Upper mould fixed plate 5 is connected solid by bolt or screw rod
Surely the lower end of master cylinder 4 is arrived.Master cylinder 4 is provided with master cylinder fixed plate 17, and master cylinder fixed plate 17 is fixedly attached into frame 1 by bolt
On.
After upper mould 6 and the lower matched moulds of mould 3, the outer surface of its one elbow with straight section of mold cavity surface composition, upper mould 6 is with
The die joint of mould 3 is bent along gained is stretched perpendicular to its longitudinal section direction with the central axis of above-mentioned elbow with straight section outer surface
Face.The cavity mold surface of upper mould 6 is the elbow with straight section outer surface medial type face, and the cavity mold surface chi of lower mould 3 is that the band is straight
Section elbow outer surface lateral face.Upper mould 6 and the cavity mold surface size of lower mould 3 and the outer surface type face one of the elbow with straight section of shaping
Cause, in addition to longer along central axis direction length except the both ends face of cylinder.Upper mould 6 and the cavity mold surface both ends face of cylinder length of lower mould 3 should
Whole blank is completely in the die cavity of mould 6 and lower mould 3 after ensureing matched moulds.Secondary cylinder I 2, the axis of secondary cylinder II 10 and master
Cylinder 4 into 45 jiaos, for finally shape 90 angles elbow.Pressure setting can realize the fortune in three directions in same plane
It is dynamic.Three directions are all respectively：Vertical direction and point its both sides is arranged therewith into the both direction of equal angular, three directions are prolonged
Long line is met at a bit.The power set of the motion in three directions can be hydraulic station liquid feeding cylinder pressure, electric cylinder etc..Plug I 7 and core
Rod II 9 is cylindrical forward with the transitions such as chamfering or fillet, the nominal of the diameter and shaping elbow of plug I and plug II
Latus rectum is identical.
Embodiment 1
The step of elbow with straight section die forming method, is as follows：
1st, blanking
It is straight with production material 20G, inside nominal diameter DN=300mm, external diameter OD=325mm, radius of curvature R=457mm, both ends
The present invention will be described exemplified by segment length a=50mm 90 degree of seamless hot-pressed elbows.
Inside nominal diameter DN=300mm is chosen, external diameter OD=325mm, radius of curvature R=457mm hot push elbow is as hair
Base 8.The longitudinal section of elbow with straight section 12 and appearance are equal to according to the length of intersection circular arc AB on the inside of the longitudinal section of blank 8 and outer surface
Intersection straightway CE, DF and circular arc EF total length takes plus the allowance for being machined car groove, allowance on the inside of face
10mm, ensure enough allowance, so the angle of blank 8 is 114 degree.
2nd, inner side shapes
Blank 8 is symmetrically placed on the lower mould 3 of pressure setting, upper mould 6 move downward make outer 8 inner surfaces of blank with it is upper
The die cavity of mould 6 contacts, and continues traveling downwardly blank and is plastically deformed, after upper mould 6 and the lower matched moulds of mould 3, its mold cavity surface composition one
The outer surface of individual elbow with straight section, its outer surface is consistent with the seamless hot-pressed elbow exterior surface dimension to be produced, except upper mould 6 is with
The both ends face of cylinder of mould 3 is beyond 150mm along central axis direction length.Whole blank is complete after the more a length of guarantee matched moulds of the segment length
In die cavity in upper mould 6 and lower mould 3.The diameter of plug I 7 and plug II 9 is all 300mm.As shown in Figure 4, will add first
The blank 8 of heat to 800 to 900 degrees Celsius is placed in lower mould 3, and secondly master cylinder 4 drives upper mould 6 to lower feeding, the both ends of blank 8
Contacted at first with the upper die cavity of mould 6, upper mould 6 continues traveling downwardly, and the both ends of blank 8 slide in and out along the upper mould intracavity wall of mould 6.When upper mould 6 with
During lower 3 matched moulds of mould, the outside inner surface of blank 8 is bonded with upper mould completely, as shown in figure 5, molding is completed on the inside of the both ends of blank 8.
3rd, shaped on the outside of both ends
Plug I 7 and plug II 9 enter along upper mould 6 and the lower matched moulds rear mold die cavity both ends face of cylinder central axis of mould 3 respectively
Give, into inside the both ends of blank 8, its both ends will be wrapped in above plug I 7 and plug II 9 respectively, be wrapped in plug I 7 and core
The blank of rod II 9 is straightened, and forms the required elbow with straight section, as shown in Figure 6.Next, plug I 7 and plug II 9
Upper mould 6 returns to original position after returning to initial position, as shown in figure 4, blank 8 is taken out from lower mould 6, completion entirely shaped
Journey.
4th, clout, finished edge are cut off
By the blank 8 of taking-up, unnecessary blank is removed through over mechanical processing, car goes out groove specified in standard, completes whole
The process of individual elbow with straight section.
Claims (2)
1. elbow with straight section die forming method, it is characterised in that：Manufacturing process step is as follows：(1) blanking, with having industrialized
The elbow of the identical inside nominal diameter, external diameter and the bending radius that produce shapes on the inside of (2) as blank, blank is symmetrically placed on to pressure
On the lower mould of device processed, upper mould, which moves downward, makes inner surface outside blank be contacted with upper mould die cavity, continues traveling downwardly blank
Plastic deformation, with lower mould matched moulds, outside inner surface is closely attached on mould die cavity, blank inner side both ends shape under its effect
Into straight section, upper mould keeps the constant carry out subsequent processing in position with lower mould closure；(3) shape on the outside of both ends, two plugs edge respectively
After upper die and lower die matched moulds inside the both ends of its mold cavity both ends face of cylinder central axis push-in blank, make to deform on the outside of blank
Into straight section, two plugs retract original position afterwards, and mold returns to original position, by elbow from being removed from the molds；(4) cut off clout,
Finished edge, the unnecessary blank in elbow both ends is removed according to standard vehicle, car goes out groove and completes whole process.
2. the die forming method of elbow with straight section according to claim 1, it is characterised in that：After upper mould and lower mould matched moulds
Cavity mold surface it is consistent with the outer profile of elbow with straight section, in addition to different along central axis direction length except the both ends face of cylinder；Two cores
Rod diameter is equal to the inside nominal diameter of elbow with straight section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705851.XA CN107363138A (en) | 2017-08-17 | 2017-08-17 | Elbow with straight section die forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705851.XA CN107363138A (en) | 2017-08-17 | 2017-08-17 | Elbow with straight section die forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107363138A true CN107363138A (en) | 2017-11-21 |
Family
ID=60309174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710705851.XA Pending CN107363138A (en) | 2017-08-17 | 2017-08-17 | Elbow with straight section die forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107363138A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555058A (en) * | 2018-03-08 | 2018-09-21 | 南通爱慕希机械股份有限公司 | A kind of L-type high-pressure pipe connector can the molding clamp for machining of automated exchanged cutter |
| CN108620465A (en) * | 2018-04-27 | 2018-10-09 | 燕山大学 | Processing mold, process equipment and the processing method of elbow with straight section |
| CN109702090A (en) * | 2019-03-09 | 2019-05-03 | 长春近江汽车零部件有限公司 | Inner supporting type bending ram mould and its prepare pipe fitting process |
| CN110586684A (en) * | 2019-10-25 | 2019-12-20 | 大连理工大学 | Large-size thin-wall annular shell inflation hot-press bending forming device and method |
| CN110711805A (en) * | 2019-09-30 | 2020-01-21 | 山西江淮重工有限责任公司 | One-time extrusion forming tool and method for pressure-resistant special-shaped bent pipe |
| CN112024790A (en) * | 2019-11-26 | 2020-12-04 | 苏州市新艺弹簧厂 | Bending device of bent pipe spring |
| CN112776104A (en) * | 2021-02-08 | 2021-05-11 | 山东鑫鹏程木业加工有限公司 | Hydraulic forming machine and method for circular template |
| CN114433689A (en) * | 2021-12-29 | 2022-05-06 | 江苏兴洋管业股份有限公司 | Forming processing technology of stainless steel elbow |
| CN115781196A (en) * | 2022-12-14 | 2023-03-14 | 江苏志得管业有限公司 | Cold machining process for pipe fitting elbow structure |
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| JPS5732831A (en) * | 1980-08-06 | 1982-02-22 | Benkan Plant Kk | Method for manufacturing bent pipe joint continuously formed relatively long straight pipe part in one body at both ends |
| CN1072627A (en) * | 1991-11-28 | 1993-06-02 | 陈振业 | The manufacture method of the steel elbow of band straight length and mould and products thereof |
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| CN1850390A (en) * | 2006-04-29 | 2006-10-25 | 渤海船舶重工有限责任公司 | Method for making steel elbow with straight tube section |
| CN201399531Y (en) * | 2009-05-11 | 2010-02-10 | 江阴市扬子管件有限公司 | 90 degrees small R half-shell elbow with straight section forming die |
| CN102744284A (en) * | 2012-06-05 | 2012-10-24 | 燕山大学 | High-pressure elbow pipe billet heat-pushing temperature pressure shaping method |
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2017
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| JPS5732831A (en) * | 1980-08-06 | 1982-02-22 | Benkan Plant Kk | Method for manufacturing bent pipe joint continuously formed relatively long straight pipe part in one body at both ends |
| CN1072627A (en) * | 1991-11-28 | 1993-06-02 | 陈振业 | The manufacture method of the steel elbow of band straight length and mould and products thereof |
| CN1276274A (en) * | 2000-07-24 | 2000-12-13 | 孙惠民 | Technology for manufacturing elbow pipe with straight segment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555058A (en) * | 2018-03-08 | 2018-09-21 | 南通爱慕希机械股份有限公司 | A kind of L-type high-pressure pipe connector can the molding clamp for machining of automated exchanged cutter |
| CN108620465A (en) * | 2018-04-27 | 2018-10-09 | 燕山大学 | Processing mold, process equipment and the processing method of elbow with straight section |
| CN109702090A (en) * | 2019-03-09 | 2019-05-03 | 长春近江汽车零部件有限公司 | Inner supporting type bending ram mould and its prepare pipe fitting process |
| CN110711805A (en) * | 2019-09-30 | 2020-01-21 | 山西江淮重工有限责任公司 | One-time extrusion forming tool and method for pressure-resistant special-shaped bent pipe |
| CN110586684A (en) * | 2019-10-25 | 2019-12-20 | 大连理工大学 | Large-size thin-wall annular shell inflation hot-press bending forming device and method |
| CN110586684B (en) * | 2019-10-25 | 2020-09-22 | 大连理工大学 | Large-size thin-wall annular shell inflation hot-press bending forming device and method |
| CN112024790A (en) * | 2019-11-26 | 2020-12-04 | 苏州市新艺弹簧厂 | Bending device of bent pipe spring |
| CN112024790B (en) * | 2019-11-26 | 2022-05-10 | 苏州市新艺弹簧厂 | Bending device of bent pipe spring |
| CN112776104A (en) * | 2021-02-08 | 2021-05-11 | 山东鑫鹏程木业加工有限公司 | Hydraulic forming machine and method for circular template |
| CN114433689A (en) * | 2021-12-29 | 2022-05-06 | 江苏兴洋管业股份有限公司 | Forming processing technology of stainless steel elbow |
| CN114433689B (en) * | 2021-12-29 | 2024-03-12 | 江苏兴洋管业股份有限公司 | Forming processing technology of stainless steel elbow |
| CN115781196A (en) * | 2022-12-14 | 2023-03-14 | 江苏志得管业有限公司 | Cold machining process for pipe fitting elbow structure |
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Application publication date: 20171121 |
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