CN107398518A - The rolling and fetal membrane forging of the double flange semi-rings of structural steel are unified into shape method - Google Patents

The rolling and fetal membrane forging of the double flange semi-rings of structural steel are unified into shape method Download PDF

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Publication number
CN107398518A
CN107398518A CN201710704353.3A CN201710704353A CN107398518A CN 107398518 A CN107398518 A CN 107398518A CN 201710704353 A CN201710704353 A CN 201710704353A CN 107398518 A CN107398518 A CN 107398518A
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CN
China
Prior art keywords
rings
ring
fetal membrane
double flange
rolling
Prior art date
Application number
CN201710704353.3A
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Chinese (zh)
Inventor
李艳英
黎汝栋
斯庆阳
张小梅
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贵州安大航空锻造有限责任公司
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Priority to CN201611093595 priority Critical
Priority to CN2016110935955 priority
Application filed by 贵州安大航空锻造有限责任公司 filed Critical 贵州安大航空锻造有限责任公司
Publication of CN107398518A publication Critical patent/CN107398518A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/06Making articles shaped as bodies of revolution rings of restricted axial length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002Hybrid process, e.g. forging following casting

Abstract

The invention discloses a kind of rolling of the double flange semi-rings of structural steel and fetal membrane forging to be unified into shape method, and its step is:Structure Steel Bar jumping-up, punching are first obtained into middle base, roll forming is middle ring billet again, middle ring billet is machined, obtain flanged (FLGD) ring billet, flanged (FLGD) ring billet is placed on progress fetal membrane forging in fetal membrane, flanged (FLGD) ring is obtained, by ring from the centre of two symmetrical flanges, cutting vertically obtains two double flange semi-rings.This method can both improve operating efficiency, reduce the requirement to capacity of equipment again, obtain size and double flange semi-rings of good performance.This method is used for the shaping of double flange semi-rings.

Description

The rolling and fetal membrane forging of the double flange semi-rings of structural steel are unified into shape method

Technical field

The present invention relates to one kind rolling and fetal membrane forging method, rolling more particularly to the double flange semi-rings of structural steel and Fetal membrane forging is unified into shape method.

Background technology

Double flange semi-rings are often used as the fixing device of aero-engine casing, in actual production process, typically all It is first to be forged into an annular element with two flanges, then two double flanges half is cut into vertically from the centre of two flanges Ring.It because with the presence of two flanges, can not directly be produced, and can only be forged into using fetal membrane using annular element rolling mode Shape, but the forging build is larger, flange position changes of section is very big, will to equipment tonnage directly using fetal membrane forging Ask high, and the defects of filling is discontented easily occur.

The content of the invention

The technical problem to be solved in the present invention is to provide one kind rolling and fetal membrane forging to be unified into shape method, to realize double methods Blue half loop forming, so as to obtain size and double flange semi-rings of good performance.

In order to solve the above technical problems, the rolling and fetal membrane forging of the double flange semi-rings of structural steel of the present invention are unified into shape Method, its technical scheme comprise the following steps:

Structural steel is cutting into bar by certain specification;Structure Steel Bar is heated to 1100 DEG C, protected by 0.8min/mm Temperature;Then jumping-up, punching on forcing press, middle base is obtained after cooling, annealing;Middle base is reheated to 1100 DEG C again, It is incubated by 0.8min/mm;Be placed on looping mill and rolled, during rolling, home roll to the maximum pressure of middle base for 430KN~ 470KN, its calculation are F=a × β × n × σ × S, wherein, a is for what home roll gradient restricted spread increased pressure by Number, β are parameter of the influence of intermediate stress, and n is stress status modulus, the flow stress of σ materials, S be home roll and middle base most Large access area;After the completion of rolling, air cooling, middle ring billet is obtained;

Middle ring billet is machined, two flanges is processed in middle ring billet symmetric position, obtains ring billet;

Ring billet is reheated to 1100 DEG C, is incubated by 0.8min/mm;Be placed in fetal membrane, driving forging hammer with 1270KN~ Ring billet forging and molding is the ring with two flanges by 1340KN driving force extruding drift, the calculating side of the driving force of forging hammer Formula is F=(1+ μ) × σ × S1, in formula, μ is friction factor, the flow stress of σ materials, S1For ring billet and the contact area of fetal membrane;

By ring from the centre of two symmetrical flanges, two double flange semi-rings are cut into vertically, double flange semi-rings have Two flanges.

The structural steel is 38CrA steel.

Compared with prior art, beneficial effects of the present invention are as follows:

The rolling and fetal membrane forging of the double flange semi-rings of structural steel of the present invention are unified into shape method, pass through rolling and fetal membrane Forging joint shaping, both improves operating efficiency, reduces the requirement to capacity of equipment again, in the manufacturing process, to equipment Maximum pressure requirement is 1340KN so that double flange semi-rings can be shaped using ordinary press.Double flanges of this method shaping Half ring size and performance can meet requirement.

After testing, the double flange semi-rings of this method production 38CrA steel, its room temperature tensile properties are as follows:

Tensile strength is 1050MPa (1030MPa for being more than design requirement), and yield strength is 935MPa~955MPa (880MPa for being more than design requirement), elongation after fracture are 14%~19% (be more than design requirement 12%), are broken Face shrinkage factor was 61%~61.5% the 40% of requirement (is more than design), impact value 1363kJ/m2~1368kJ/m2It is (big In the 590kJ/m of design requirement2)。

Brief description of the drawings

The present invention is described in further detail with reference to the accompanying drawings and detailed description.

Fig. 1 is the structural representation of middle ring billet.

Fig. 2 is flanged (FLGD) ring billet structural representation.

Fig. 3 is double flange semi-loop schematic diagrames.

Embodiment

The rolling and fetal membrane forging for implementing the double flange semi-rings of structural steel of the present invention are unified into shape method and need to provide The equipment such as forge furnace, forcing press, manipulator, looping mill, cutting off machine.It is by 38CrA structural steel of China's material trademark Example, to illustrate the embodiment of this method:

The main chemical elements content (percentage by weight) of the 38CrA steel is:C content 0.34%~0.42%, amount containing Mn 0.50%~0.80%, si content 0.17%~0.37%, amount containing S≤0.015%, P content≤0.025%, amount containing Cr 0.08%~1.10%, ni content≤0.40%, amount containing Cu≤0.25, surplus Fe.

The step of this method, is as follows:

38CrA steel is cutting into bar by certain specification;38CrA Steel Bars are heated to 1100 DEG C, by 0.8min/mm Insulation;Then jumping-up, punching on forcing press, middle base is obtained after cooling, annealing;Middle base is reheated to 1100 again DEG C, it is incubated by 0.8min/mm;It is placed on looping mill and is rolled, during rolling, home roll is 430KN to the maximum pressure of middle base ~470KN, its calculation are F=a × β × n × σ × S, wherein, a is for what home roll gradient restricted spread increased pressure by Number, β are parameter of the influence of intermediate stress, and n is stress status modulus, the flow stress of σ materials, S be home roll and middle base most Large access area;After the completion of rolling, air cooling, middle ring billet 1 is obtained, as shown in Figure 1;

Middle ring billet 1 is machined, two flanges 3 is processed in middle ring billet symmetric position, obtains ring billet 2, As shown in Figure 2;

Ring billet 2 is reheated to 1100 DEG C, is incubated by 0.8min/mm;Be placed in fetal membrane, driving forging hammer with 1270KN~ The forging and molding of ring billet 2 is the ring with two flanges by 1340KN driving force extruding drift, the calculating of the driving force of forging hammer Mode is F=(1+ μ) × σ × S1, in formula, μ is friction factor, the flow stress of σ materials, S1For ring billet and the contact surface of fetal membrane Product;

By ring from the centre of two symmetrical flanges, two double flange semi-rings 4 are cut into vertically, double flange semi-rings have Two flanges 5, as shown in Figure 3.

Claims (2)

1. the rolling and fetal membrane forging of a kind of double flange semi-rings of structural steel are unified into shape method, it is characterised in that including following step Suddenly:
Structural steel is cutting into bar by certain specification;Structure Steel Bar is heated to 1100 DEG C, is incubated by 0.8min/mm; Then jumping-up, punching on forcing press, middle base is obtained after cooling, annealing;Middle base is reheated to 1100 DEG C again, pressed 0.8min/mm is incubated;Be placed on looping mill and rolled, during rolling, home roll to the maximum pressure of middle base for 430KN~ 470KN, its calculation are F=a × β × n × σ × S, wherein, a is for what home roll gradient restricted spread increased pressure by Number, β are parameter of the influence of intermediate stress, and n is stress status modulus, the flow stress of σ materials, S be home roll and middle base most Large access area;After the completion of rolling, air cooling, middle ring billet is obtained;
Middle ring billet is machined, two flanges is processed in middle ring billet symmetric position, obtains ring billet;
Ring billet is reheated to 1100 DEG C, is incubated by 0.8min/mm;Be placed in fetal membrane, driving forging hammer with 1270KN~ Ring billet forging and molding is the ring with two flanges by 1340KN driving force extruding drift, the calculating side of the driving force of forging hammer Formula is F=(1+ μ) × σ × S1, in formula, μ is friction factor, the flow stress of σ materials, S1For ring billet and the contact area of fetal membrane;
By ring from the centre of two symmetrical flanges, two double flange semi-rings are cut into vertically, double flange semi-rings have two Flange.
2. the rolling and fetal membrane forging of the double flange semi-rings of structural steel according to claim 1 are unified into shape method, its feature It is, the structural steel is 38CrA steel.
CN201710704353.3A 2016-12-01 2017-08-16 The rolling and fetal membrane forging of the double flange semi-rings of structural steel are unified into shape method CN107398518A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201611093595 2016-12-01
CN2016110935955 2016-12-01

Publications (1)

Publication Number Publication Date
CN107398518A true CN107398518A (en) 2017-11-28

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615223A (en) * 2012-03-30 2012-08-01 山东建筑大学 Method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces
JP2012166229A (en) * 2011-02-14 2012-09-06 Jtekt Corp Method for manufacturing blank for bearing ring of rolling bearing
CN102836937A (en) * 2012-08-31 2012-12-26 武汉理工大学 Symmetrical composite roll forming method of external step ring with thick wall and small hole
CN203245182U (en) * 2013-01-14 2013-10-23 山东润驰重型锻造有限公司 Rolled kettle body flange
CN104259762A (en) * 2014-08-18 2015-01-07 贵州航宇科技发展股份有限公司 Forging and forming method for F22 flange ring pieces with non-uniform sections
CN104384826A (en) * 2014-08-18 2015-03-04 贵州航宇科技发展股份有限公司 Forging method of GH4169 alloy inner cartridge receiver special-shaped ring part
CN104889681A (en) * 2015-05-19 2015-09-09 宁波大学 Method for processing welding neck flange
CN105478637A (en) * 2015-12-25 2016-04-13 贵州航宇科技发展股份有限公司 Manufacturing method and mold of 2219 aluminum alloy strap inner flange high cylinder special-shaped annular forging
WO2016098886A1 (en) * 2014-12-19 2016-06-23 Ntn株式会社 Method for manufacturing inner member and hub ring of wheel bearing device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012166229A (en) * 2011-02-14 2012-09-06 Jtekt Corp Method for manufacturing blank for bearing ring of rolling bearing
CN102615223A (en) * 2012-03-30 2012-08-01 山东建筑大学 Method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces
CN102836937A (en) * 2012-08-31 2012-12-26 武汉理工大学 Symmetrical composite roll forming method of external step ring with thick wall and small hole
CN203245182U (en) * 2013-01-14 2013-10-23 山东润驰重型锻造有限公司 Rolled kettle body flange
CN104259762A (en) * 2014-08-18 2015-01-07 贵州航宇科技发展股份有限公司 Forging and forming method for F22 flange ring pieces with non-uniform sections
CN104384826A (en) * 2014-08-18 2015-03-04 贵州航宇科技发展股份有限公司 Forging method of GH4169 alloy inner cartridge receiver special-shaped ring part
WO2016098886A1 (en) * 2014-12-19 2016-06-23 Ntn株式会社 Method for manufacturing inner member and hub ring of wheel bearing device
CN104889681A (en) * 2015-05-19 2015-09-09 宁波大学 Method for processing welding neck flange
CN105478637A (en) * 2015-12-25 2016-04-13 贵州航宇科技发展股份有限公司 Manufacturing method and mold of 2219 aluminum alloy strap inner flange high cylinder special-shaped annular forging

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