CN107876673A - A kind of Y-type three way type multi-ram forging technique and mould - Google Patents

A kind of Y-type three way type multi-ram forging technique and mould Download PDF

Info

Publication number
CN107876673A
CN107876673A CN201610877685.7A CN201610877685A CN107876673A CN 107876673 A CN107876673 A CN 107876673A CN 201610877685 A CN201610877685 A CN 201610877685A CN 107876673 A CN107876673 A CN 107876673A
Authority
CN
China
Prior art keywords
type
forging
mould
die cavity
cavity
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.)
Withdrawn
Application number
CN201610877685.7A
Other languages
Chinese (zh)
Inventor
周菊明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Chang Qiang Industrial Polytron Technologies Inc
Original Assignee
Shanghai Chang Qiang Industrial Polytron Technologies Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Chang Qiang Industrial Polytron Technologies Inc filed Critical Shanghai Chang Qiang Industrial Polytron Technologies Inc
Priority to CN201610877685.7A priority Critical patent/CN107876673A/en
Publication of CN107876673A publication Critical patent/CN107876673A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00Branching pipes; Joining pipes to walls
    • F16L41/02Branch units, e.g. made in one piece, welded, riveted
    • F16L41/023Y- pieces
    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • 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
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • 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
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025Closed die forging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/14Making machine elements fittings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/14Making machine elements fittings
    • B21K1/16Making machine elements fittings parts of pipe or hose couplings

Abstract

The present invention relates to manufacture large-scale firepower power station Y-type three way type forging technical field, especially a kind of Y-type three way type multi-ram forging technique and mould, mould includes symmetrical left mould and right mould, mold cavity is formed between left mould and right mould, mold cavity includes primary cavity, left tiltedly branch die cavity and right tiltedly branch die cavity, the inner face of mold cavity and the external structure of Y-type three way type are adapted, and abaculus is equipped with left tiltedly branch die cavity and right oblique branch die cavity.The Y-type three way type multi-ram forging technique of the present invention improves stock utilization, intensity, processing efficiency, stock utilization reaches 80% or so, and total production cycle can at least reduce 26% on the premise of forging globality is ensured.

Description

A kind of Y-type three way type multi-ram forging technique and mould
Technical field
The present invention relates to manufacture large-scale firepower power station Y-type three way type forging technical field, the especially multidirectional mould of Y-type three way type Forging process and mould.
Background technology
Y-type three way type is the important pipeline member of station boiler main body, for transmitting, shunting high-temperature high-pressure steam, therefore it is right Pipeline strength, high temperature croop property require higher.Therefore Y-type three way type is in addition to using special material, to its processing mode Further requirement is done.General power station is weighed several tons (by taking DN800 as an example, weighing 4 tons or so) with Y-type three way type, original production mode It is to be welded with three pipelines, long-term use of the welding junction strength problem to pipeline causes potential safety hazard.In recent years occur Y-type three way type can be integrally forged, therefore avoids welding sequence using open die forging+mach method of large hydraulic press, greatly Enhance product strength.Because product tonnage is excessive, overall forging Y-type three way type can only use the mode of open die forging to produce, this Though technique disclosure satisfy that product strength and globality requirement, (such as 4 tons of products need to throw stock utilization between 20%~30% More than 18 tons of material), the very big waste of material is caused, production cost is very high.And the production cycle of single products was on 50 days left sides Right (raw material containing buying), time cost is high.
The content of the invention
The purpose of the present invention is to overcome the shortcomings of the prior art, there is provided one kind improves production efficiency and stock utilization Y-type three way type multi-ram forging technique and mould.
In order to realize the purpose of the present invention, used technical scheme is:
The Y-type three way type multi-ram forging technique of the present invention comprises the following steps:
A., steel ingot is provided, by Heating Steel Ingots to initial forging temperature, the then cropping material tail and by steel on open die forging forcing press Ingot open die forging breaks into forging rod;
B. preheated after mould assembling, be put into the shaping storehouse of forcing press, wherein, mould includes symmetrical left mould and the right side Mould, mold cavity being formed between left mould and right mould, the mold cavity includes primary cavity, left tiltedly branch die cavity and right tiltedly branch die cavity, The inner face of the mold cavity and the external structure of Y-type three way type are adapted, and are equipped with the left tiltedly branch die cavity and right oblique branch die cavity Abaculus;
C. the forging rod is inserted into the primary cavity after reheating, then the drift extruding forging rod of forcing press, with Extruding is carried out, and forging rod contacts at first with the branch point of mold cavity, then oblique branch die cavity and right tiltedly branch mold cavity deformation flowing to the left, After forging rod touches abaculus, the blank parcel abaculus for forging rod continues to flow, the position that forging rod mutually extrudes with drift and abaculus The place of putting forms shrinkage pool, deformation completion when drift presses to design runlength, forges rod into Y-type three way type forging;
D. after forcing press unloading, mould ejection is shaped into storehouse, heat after die sinking is taken out Y-type three way type forging and forged after cooling Processing;
E. Y-type three way type forging is drilled, bore hole is then carried out to Y-type three way type forging and the turnning and milling later stage machines.
Initial forging temperature of the present invention is 1150 DEG C~1230 DEG C, and the forcing press is ten thousand tons of stamp forging hydraulic press.
Forcing press punching press front mold die cavity inner face of the present invention sprays lubricant.
Drift is replaced with hole-expansion punch according to being actually needed by the present invention in the step c after the completion of Pressing Deformation, is led to Cross hole-expansion punch and reaming is carried out to the shrinkage pool of Y-type three way type forging.
The present invention also provides a kind of Y-type three way type coredforging mould, for above-mentioned Y-type three way type multi-ram forging technique, institute Stating mould includes symmetrical left mould and right mould, and mold cavity is formed between left mould and right mould, and the mold cavity includes master Die cavity, left tiltedly branch die cavity and right tiltedly branch die cavity, the inner face of the mold cavity and the external structure of Y-type three way type are adapted, the left side Abaculus is equipped with oblique branch die cavity and right oblique branch die cavity.
Abaculus of the present invention is fixedly clamped by the left mould and right mould, and the pressed end of the abaculus is deep into a corresponding left side In oblique branch die cavity or right oblique branch die cavity.
The Y-type three way type multi-ram forging technique of the present invention and the beneficial effect of mould are:The Y-type three way type multi-ram forging of the present invention Technique instead of general open die forging method and manufacture large-scale Y-type three way type, and original free forging process need to be generally up to 24 hours The forging process of (three order of classes or grades at school), including reheat at least 8 times, and the die forging method forging process that the present invention uses only needs to count Minute, only need a fire shaping, than open die forging process saves time nearly time, while save mass energy, material profit More than 80% is brought up to by 20~30% with rate, because forging flow lines is complete, product use intensity and anticorrosive intensity are increased Add.For Post isothermal treatment and machining, open die forging mode needs to be heat-treated, saws the process such as material, bore hole, rough turn at least 23 days, mould Due to being closely sized to final products, above process only needs 10 days the product that forging mode produces.The multidirectional mould of Y-type three way type of the present invention Forging process improves stock utilization, intensity, processing efficiency, stock utilization reaches on the premise of forging globality is ensured 80% or so (such as 4 tons of products only need to feed intake 5~6 tons), total production cycle can at least shorten 26%.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of the Y-type three way type of the present invention;
Fig. 2 is the A-A of the Y-type three way type in Fig. 1 to sectional view;
Fig. 3 is the mould structure schematic diagram of the present invention;
Fig. 4 is the mould use state diagram of the present invention.
Wherein:Y-type three way type 1, mould 2, forging rod 3, abaculus 4, drift 5, fixing device 6.
Embodiment
In the description of the invention, it is to be understood that term " radial direction ", " axial direction ", " on ", " under ", " top ", " bottom ", The orientation or position relationship of the instructions such as " interior ", " outer " are based on orientation shown in the drawings or position relationship, are for only for ease of and retouch State the present invention and simplify description, rather than indicate or imply that signified device or element there must be specific orientation, with specific Azimuth configuration and operation, therefore be not considered as limiting the invention.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
In the description of the invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " installation ", " sets Put ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be to be joined directly together, can also be indirectly connected by intermediary.For the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As Figure 1-4, the Y-type three way type multi-ram forging technique of the present embodiment comprises the following steps:
A., steel ingot is provided, by Heating Steel Ingots to initial forging temperature, the then cropping material tail and by steel on open die forging forcing press Ingot open die forging breaks into forging rod 3, wherein, steel ingot can be made of casting process, that is, allow molten steel through containing ladle injection mold solidification Steel ingot is formed, can also directly order steel ingot, first by Heating Steel Ingots to initial forging temperature during processing, initial forging temperature is 1150 DEG C~ 1230 DEG C, then cropping material tail and steel ingot open die forging is broken into forging rod 3 on open die forging forcing press, for large-scale steel ingot, no It can directly forge, forging rod 3 to be made according to certain forging ratio, could be carried out most after healing interior void and improvement grain structure Finish-forging is made;
B. mould 2 preheats after assembling, and is put into the shaping storehouse of forcing press, and shaping storehouse has clamping structure, and mould 2 passes through clamping Structure is fixed, and forcing press is ten thousand tons of stamp forging hydraulic press, the stamp forging hydraulic press is acted on by powerful pressure, makes performance common Metal material flows in mould 2, refines internal grain, realizes the overall precision form of large-scale forging part, wherein, mould 2 wraps Symmetrical left mould and right mould are included, mold cavity is formed between left mould and right mould, mold cavity includes primary cavity, left tiltedly branch type Chamber and right tiltedly branch die cavity, the external structure of the inner face and Y-type three way type 1 of mold cavity are adapted, left tiltedly branch die cavity and right tiltedly branch die cavity Inside it is equipped with abaculus 4;
C. forging rod 3 is inserted into primary cavity after reheating, then the extruding forging rod 3 of drift 5 of forcing press, with squeezing into Row forging rod 3 contacts at first with the branch point of mold cavity, then oblique branch die cavity and right tiltedly branch mold cavity deformation flowing to the left, when forging rod After 3 touch abaculus 4, the blank parcel abaculus 4 of forging rod 3 continues to flow, the position that forging rod 3 mutually extrudes with drift 5 and abaculus 4 The place of putting forms shrinkage pool, and deformation completion when drift 5 presses to design runlength, forging rod 3 forms Y-type three way type forging, and forcing press can pass through Big pressure improves the consistency of deformable material with the long dwell time, and the synthesis of forging rod 3 is improved with refiner material crystal grain Performance, the deformation uniformity of forging rod 3 is improved, material can be saved, reach that amount of machining is few or near net type target, before forcing press punching press Mold cavity inner face sprays lubricant;
D. after forcing press unloading, mould 2 is ejected into shaping storehouse, after die sinking is taken out Y-type three way type forging and forged after cooling Heat treatment, the mechanical performance of Y-type three way type forging is further improved, eliminate residual stress, improve the machinability of forging rod 3;
E. Y-type three way type forging is drilled, bore hole is then carried out to Y-type three way type forging and the turnning and milling later stage machines.
Y-type three way type 1 if necessary to manufacture is large-size pipe, then in step c, replaces drift 5 after the completion of Pressing Deformation Hole-expansion punch is changed to, reaming is carried out to the shrinkage pool of Y-type three way type forging by hole-expansion punch, to expand the aperture of Y-type three way type forging And improve precision and reduce surface roughness value, while stock utilization is improved, the accessible dimensional tolerance grade of reaming is IT11~IT10, surface roughness value are Ra12.5~6.3 μm.
The Y-type three way type multi-ram forging technique of the present embodiment instead of general open die forging method and manufacture large-scale Y-type three way type 1, original free forging process need to generally be up to the forging process of 24 hours three order of classes or grades at school, including reheat at least 8 times, and this The die forging method forging process that embodiment uses only needs several minutes, only need one fire shaping, than open die forging process saves time it is near One time, while mass energy is saved, stock utilization brings up to more than 80% by 20~30%, because forging flow lines is complete Whole, product use intensity and anticorrosive intensity are increased.For Post isothermal treatment and machining, open die forging mode is needed at heat The process such as reason, saw material, bore hole, rough turn at least 23 days, the product that die forging mode produces with final products due to being closely sized to, the above Process only needs 10 days.The Y-type three way type multi-ram forging technique of the present embodiment improves material on the premise of forging globality is ensured Utilization rate, intensity, processing efficiency, stock utilization reach 80% or so (such as 4 tons of products only need to feed intake 5~6 tons), total production week Phase can at least shorten 26%.
The present embodiment also provides a kind of Y-type three way type coredforging mould, for above-mentioned Y-type three way type multi-ram forging technique, The mould 2 includes symmetrical left mould and right mould, and mold cavity is formed between left mould and right mould, and mold cavity includes principal mode Chamber, left tiltedly branch die cavity and right tiltedly branch die cavity, the external structure of the inner face and Y-type three way type 1 of mold cavity are adapted, left tiltedly branch die cavity with It is right to be tiltedly equipped with abaculus 4 in branch die cavity.Abaculus 4 is fixedly clamped by left mould and right mould, and the pressed end of abaculus 4 is deep into a corresponding left side In oblique branch die cavity or right oblique branch die cavity, the pressed end and 1 oblique Zhi Duan of Y-type three way type hole inner structure of abaculus 4 are adapted.
The periphery of Y-type three way type coredforging mould in the present embodiment is additionally provided with fixing device 6, and fixing device 6 is used for will Left mould and right mould are fixedly clamped so that mould is more securely fixed in shaping storehouse.
It should be appreciated that specific embodiment described above is only used for explaining the present invention, it is not intended to limit the present invention.By Among the obvious changes or variations that the spirit of the present invention is extended out is still in protection scope of the present invention.

Claims (6)

  1. A kind of 1. Y-type three way type multi-ram forging technique, it is characterised in that:Comprise the following steps:
    A., steel ingot is provided, by Heating Steel Ingots to initial forging temperature, then on open die forging forcing press cropping material tail and by steel ingot from By forging into forging rod (3);
    B. preheated after mould (2) assembling, be put into the shaping storehouse of forcing press, wherein, mould (2) includes symmetrical left mould and the right side Mould, mold cavity being formed between left mould and right mould, the mold cavity includes primary cavity, left tiltedly branch die cavity and right tiltedly branch die cavity, The inner face of the mold cavity and the external structure of Y-type three way type (1) are adapted, and are all provided with the left tiltedly branch die cavity and right oblique branch die cavity There is abaculus (4);
    C. the forging rod (3) is inserted into the primary cavity after reheating, then drift (5) the extruding forging rod (3) of forcing press, Contacted at first with the branch point of mold cavity as extruding carries out forging rod (3), then oblique branch die cavity and right tiltedly branch die cavity become to the left Shape flow, when forge rod (3) touch abaculus (4) after, forging rod (3) blank parcel abaculus (4) continues to flow, forging rod (3) with The opening position that drift (5) and abaculus (4) mutually extrude forms shrinkage pool, and deformation completion, forges rod when drift (5) presses to design runlength (3) Y-type three way type forging is formed;
    D. after forcing press unloading, mould (2) is ejected into shaping storehouse, heat after die sinking is taken out Y-type three way type forging and forged after cooling Processing;
    E. Y-type three way type forging is drilled, bore hole is then carried out to Y-type three way type forging and the turnning and milling later stage machines.
  2. 2. Y-type three way type multi-ram forging technique according to claim 1, it is characterised in that:The initial forging temperature is 1150 DEG C ~1230 DEG C, the forcing press is ten thousand tons of stamp forging hydraulic press.
  3. 3. Y-type three way type multi-ram forging technique according to claim 2, it is characterised in that:The forcing press punching press front mold Die cavity inner face sprays lubricant.
  4. 4. Y-type three way type multi-ram forging technique according to claim 3, it is characterised in that:In the step c, punching press becomes Drift (5) is replaced with into hole-expansion punch after the completion of shape, reaming is carried out to the shrinkage pool of Y-type three way type forging by hole-expansion punch.
  5. A kind of 5. Y-type three way type coredforging mould, for the Y-type three way type multi-ram forging as described in claim 1-4 any one Technique, it is characterised in that:The mould (2) includes symmetrical left mould and right mould, and mould type is formed between left mould and right mould Chamber, the mold cavity include primary cavity, left tiltedly branch die cavity and right tiltedly branch die cavity, the inner face and Y-type three way type of the mold cavity (1) external structure is adapted, and abaculus (4) is equipped with the left tiltedly branch die cavity and right oblique branch die cavity.
  6. 6. Y-type three way type coredforging mould according to claim 5, it is characterised in that:The abaculus (4) is by the left mould It is fixedly clamped with right mould, the pressed end of the abaculus (4) is deep into corresponding left tiltedly branch die cavity and right oblique branch die cavity.
CN201610877685.7A 2016-09-30 2016-09-30 A kind of Y-type three way type multi-ram forging technique and mould Withdrawn CN107876673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610877685.7A CN107876673A (en) 2016-09-30 2016-09-30 A kind of Y-type three way type multi-ram forging technique and mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610877685.7A CN107876673A (en) 2016-09-30 2016-09-30 A kind of Y-type three way type multi-ram forging technique and mould

Publications (1)

Publication Number Publication Date
CN107876673A true CN107876673A (en) 2018-04-06

Family

ID=61770203

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610877685.7A Withdrawn CN107876673A (en) 2016-09-30 2016-09-30 A kind of Y-type three way type multi-ram forging technique and mould

Country Status (1)

Country Link
CN (1) CN107876673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109366097A (en) * 2018-05-31 2019-02-22 昆明冶金研究院 A kind of preparation process and products thereof of LP gas cylinder upper cover
CN112122533A (en) * 2020-09-16 2020-12-25 燕山大学 Square tee two-stage forming die and forming process

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1157920A (en) * 1997-08-08 1999-03-02 Toto Ltd Method and device for full enclosed die forging
CN202824482U (en) * 2012-09-28 2013-03-27 江苏隆盛钻采机械制造有限公司 Multidirectional integrate die forging hydraulic machine
KR20140071691A (en) * 2012-12-04 2014-06-12 김한규 a forging die device of connecting pipe
CN104475634A (en) * 2014-11-13 2015-04-01 温州科锻机械有限公司 Multi-directional die forging technology
CN204700224U (en) * 2015-03-19 2015-10-14 燕山大学 The vertical split cast mounting of multinomial die forging
CN105382168A (en) * 2015-12-01 2016-03-09 二十二冶集团精密锻造有限公司 Multidirectional die-forging forming die and forming method of valve forge part with main flange
CN205551352U (en) * 2016-04-21 2016-09-07 李韶兴 Multipleram forging forming device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1157920A (en) * 1997-08-08 1999-03-02 Toto Ltd Method and device for full enclosed die forging
CN202824482U (en) * 2012-09-28 2013-03-27 江苏隆盛钻采机械制造有限公司 Multidirectional integrate die forging hydraulic machine
KR20140071691A (en) * 2012-12-04 2014-06-12 김한규 a forging die device of connecting pipe
CN104475634A (en) * 2014-11-13 2015-04-01 温州科锻机械有限公司 Multi-directional die forging technology
CN204700224U (en) * 2015-03-19 2015-10-14 燕山大学 The vertical split cast mounting of multinomial die forging
CN105382168A (en) * 2015-12-01 2016-03-09 二十二冶集团精密锻造有限公司 Multidirectional die-forging forming die and forming method of valve forge part with main flange
CN205551352U (en) * 2016-04-21 2016-09-07 李韶兴 Multipleram forging forming device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张家伟: "带主法兰三通阀体多向模锻成形工艺研究", 《中国优秀硕士学位论文全文数据库(电子期刊)》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109366097A (en) * 2018-05-31 2019-02-22 昆明冶金研究院 A kind of preparation process and products thereof of LP gas cylinder upper cover
CN112122533A (en) * 2020-09-16 2020-12-25 燕山大学 Square tee two-stage forming die and forming process

Similar Documents

Publication Publication Date Title
CN103691874B (en) A kind of thin-wall nut manufacturing process
CN103894436B (en) A kind of reciprocating extrusion device and processing method strengthening magnesium-alloy tube
CN106363352B (en) A kind of manufacturing process of high-strength aluminum alloy ring forging
CN100431775C (en) Fast precise semi-axle casing extruding formation process
CN104107897B (en) The squeeze casting mould of straight tooth column metal gear and casting method thereof
CN104015009B (en) A kind of mobile phone center, the preparation method of bonnet
CN104384826A (en) Forging method of GH4169 alloy inner cartridge receiver special-shaped ring part
CN101244507B (en) Process for manufacturing TC4 titanium alloy thin wall overpressure resistant barrel
CN101823085B (en) Variable-channel extrusion die and forming method
CN101850376B (en) Method and die for forward extrusion and variable diameter bending extrusion of magnesium alloy semi-solid billets
CN101693279B (en) Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts
CN104785563B (en) Method with bottom long tubular workpiece precise extrusion molding
CN101398165B (en) Major vapour inlet/outlet joint pipe for nuclear plant steam generator and forging method thereof
CN102836895A (en) Method for manufacturing special-shaped seamless steel pipe
CN101695739B (en) Forging process of large tee and large skew tee
CN103143659B (en) Hollow forging method of nuclear power main pipeline
CN101934336B (en) Method and device for semi-solid precision rheo-casting of light alloys
CN102049457B (en) Precision forging process for engine connecting rod and precision forging die
CN102240772B (en) Forming method of single elbow crankshaft forgings
CN102764838A (en) Gear thermal precision forging machining process adopting carburizing steel 20CrMnTi as material
CN102672096B (en) Precision die forging and shaping technical method for automobile steering knuckle rough type parts
CN100469486C (en) Rolling preparation method for thick-walled and thin-bottomed basin parts
CN101279347A (en) Method for rolling and shaping stainless steel conical ring
CN101402163A (en) Bearing ferrule workblank triple external member smithing and molding process
CN106623941B (en) A kind of powder metallurgy superalloy element stages heating squeezes control shape method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20180406