CN104785706B - Hubbed flange die-forging forming processing method - Google Patents

Hubbed flange die-forging forming processing method Download PDF

Info

Publication number
CN104785706B
CN104785706B CN201410613167.5A CN201410613167A CN104785706B CN 104785706 B CN104785706 B CN 104785706B CN 201410613167 A CN201410613167 A CN 201410613167A CN 104785706 B CN104785706 B CN 104785706B
Authority
CN
China
Prior art keywords
forging
die
forming processing
hubbed flange
hammer
Prior art date
Application number
CN201410613167.5A
Other languages
Chinese (zh)
Other versions
CN104785706A (en
Inventor
张晓平
陈昌
凌毅
戴艳珊
裴银柱
Original Assignee
连云港珍珠河石化管件有限公司
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 连云港珍珠河石化管件有限公司 filed Critical 连云港珍珠河石化管件有限公司
Priority to CN201410613167.5A priority Critical patent/CN104785706B/en
Publication of CN104785706A publication Critical patent/CN104785706A/en
Application granted granted Critical
Publication of CN104785706B publication Critical patent/CN104785706B/en

Links

Classifications

    • 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
    • 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

Abstract

The present invention provides a kind of hubbed flange die-forging forming processing method.The method of the present invention is comprised the following steps:Blanking;Heating;C. blocking:Discharged from forge furnace with operation machine upset to the all-hydraulic free forging electrohydraulic hammers of 8T, 1250 DEG C ± 20 DEG C of initial forging temperature, forging time about 10 15 seconds, cycle about 56 times reach the size of technological requirement;Die forging:Workpiece is forged working area from shifting formwork, and die forging, 1050 DEG C ± 20 DEG C of final forging temperature, forging time 20 30 seconds, cycle 68 times, it is desirable to which blank is completely filled with die cavity is carried out with die forging electrohydraulic hammer;Trimming, punching;Inspection;Heat treatment;Inspection, labelling, warehouse-in.Forger labor intensity of the present invention significantly declines, and materials ratio is significantly reduced, and environmental pollution is controlled effectively, and production cost is decreased obviously.

Description

Hubbed flange die-forging forming processing method

Technical field:

The present invention relates to a kind of hubbed flange die-forging forming processing method, belongs to precision forging and automated control technology neck Domain.

Background technology:

Flange is the common components on pipeline, belongs to pressure pipeline element, is widely used in oil, chemical industry, shipbuilding, core The industries such as electricity, power plant construction, extra-high voltage conveying electricity, food, pharmacy, Aero-Space, non-ferrous metal metallurgy, urban water supply, papermaking Pipeline on.Rustless steel American Standard hubbed flange is used under the environment such as high temperature, low temperature, corrosion in a large number(ASME B16.5 WN)Produce Product.At present, domestic flange manufacturing enterprise forging technology generally adopts open die forging, swage forging conventional forging process, material consumption amount Greatly, high labor intensive, high energy consumption, production efficiency are low, quality stability is poor, environmental pollution is serious, cause production cost High, lack the market competitiveness.

Traditional rustless steel American Standard hubbed flange(ASME B16.5 WN)Shaping process:(With ASME B16.5 150Lb As a example by WN16 " sch40s F316L products):

A. through checking qualified stainless steel bar, by cutting stock weight requirement in technology for blanking in band sawing machine loading and unloading(This product Cutting stock weight 130KG).

B. lower good material is put in coal furnace or coal-fired reverberatory furnace or combustion gas straight-flow furnace by heating technological requirement heating To 1200 DEG C~1250 DEG C(Coal furnace is seriously polluted, and energy expenditure is big).

C. base, upset, punching are carried out on pneumatic hammer or suspender belt hammer, then melts down and be heated to initial forging temperature, at another Reaming on the saddle support of pneumatic hammer;Third time melts down heating, then the shaping in fetal membrane(Heating energy consumption is big repeatedly, efficiency hand-manipulated Low, high labor intensive).

D. each spot size is measured, meets technique processing request, Zhuan Xia roads heat treatment step;Undesirable, then continue Heating, shaping is melted down, to meet the requirement of each spot size.

E. heat treatment is carried out to workpiece, is carried out solutionizing process, adopted water-cooled by technological requirement.

F. workpiece tested, mark, remembering there are the information such as product batch number, material charge number, product specification, material.

G. certified products enter roughcast warehouse, and defective work is pressed《Control procedure of nonconforming products》It is disposed.

Content of the invention:

The purpose of the present invention is to provide a kind of hubbed flange die-forging forming processing method for above-mentioned problem, passes through The absorption of technology, makes production efficiency into the raising of decades of times, and energy consumption reduces by more than 50 percent, due to use operation machine, Industrial robot is operated, and forger labor intensity significantly declines, and materials ratio is significantly reduced, and environmental pollution is controlled effectively, raw Produce cost to be decreased obviously.

Above-mentioned purpose is achieved through the following technical solutions:

Hubbed flange die-forging forming processing method, the method are comprised the following steps:

A. blanking:Through checking qualified rustless steel rod iron, as specified in technology for blanking, cutting stock weight is upper and lower in band sawing machine Material, it is desirable to which the control of cutting stock weight deviation is in the range of ± 1%;

B. heat:Lower good material is added in forge furnace with operation machine, by heating technological requirement be heated to 1250 DEG C ± 20 DEG C, about 85 ± 10 minutes heat time heating times;

C. blocking:Discharged from forge furnace with operation machine upset to the all-hydraulic free forging electrohydraulic hammers of 8T, initial forging temperature 1250 DEG C ± 20 DEG C, forging time about 10 15 seconds, cycle about 56 times reach the size of technological requirement;

D. die forging:Workpiece is forged working area from shifting formwork, and die forging, 1050 DEG C ± 20 of final forging temperature is carried out with die forging electrohydraulic hammer DEG C, forging time 20 30 seconds, cycle 68 times, it is desirable to which blank is completely filled with die cavity;

E. trimming, punching:From closed type single point press compound trimming die;

F. check:After being air cooled to room temperature, 100% checks forging's block dimension specification and surface quality;

G. heat treatment:By solid solution treatment process requirement, heating, insulation, operation in 2 10T heat accumulating type cell-type gas furnaces Machine quick water-cooled under coming out of the stove to lower section tank;

H. check:Work inspection device hardness HB is randomly selected per melting batch:137-187;

I. labelling, warehouse-in, same to traditional handicraft.

Described hubbed flange die-forging forming processing method, the system of selection of the die forging electrohydraulic hammer tonnage described in step D For:According to finish-forging work step need select forging hammer tonnage G(kg): G=(3.5—6.3)k·FAlways

In formula:FAlwaysForging total deformation area is represented, unit is cm2, including forging area, punching core material and overlap area,

K represents steel grade coefficient, and when the carbon structural steels less than 0.25% using phosphorus content, K takes 0.9, when adopting carbon containing During the low-alloy steel of carbon structural steels and C≤0.25% of the amount higher than 0.25%, K takes 1, when using the low of phosphorus content >=0.25% During structural alloy steel, K takes 1.1, and when using high alloy-structural steel, rustless steel, K takes 1.25.

Described hubbed flange die-forging forming processing method, the closed type single point press tonnage P described in step E(KN), Selected according to forging hammer tonnage G:P=MG

In formula:M be combo coefficient, M=800 1000KN/t.

Described hubbed flange die-forging forming processing method, the heat treatment described in step G are adopted at gas heat-accumulated type heat Reason stove.

In the basis of the Single arm of described hubbed flange die-forging forming processing method, described blocking and described die forging It is provided with indirect vibration isolator.

Described hubbed flange die-forging forming processing method, in described die forging, forging die is made up of upper and lower two modules, is borrowed Dovetail, drift and key block are fastened in the dovetail groove of tup and die shoe, described dovetail:Module is made to be fixed on tup or anvil block On, dovetail bottom surface is brought into close contact with tup or anvil block bottom surface;Described drift:Module is made to position in left and right directions;Described Key block:Module is made to position in fore-and-aft direction.

Beneficial effect:

1. the automatic assembly line mode of production is carried out in production process of the present invention, and labor intensity is greatly lowered, production effect Rate is significantly improved, and product quality is stable, and accepted product percentage is up to more than 99.9%.

2. material consumption of the present invention is little, and, than substantially reduction, the concordance of product is good for materials, carries out numerical control to the machining of rear road Processing creates conditions, and improves the yield of rear road processing.

3., using regenerative gas heating furnace or intermediate frequency induction heating device, material oxidation is few, due to disposable for the present invention Heating energy consumption is significantly reduced.

4. forging hammer of the present invention adopts indirect vibration isolation, and vibration isolating effect is good, does not cause substantially vibration pollution to surrounding.

5. the present invention and the econmics comparison of traditional handicraft.(With 16 " sch40s of ASME B16.5 WN/RF 150Lb As a example by F316L products)

As can be seen from the above table, precision die forging materials ratio decline 20.6% compared with traditional open die forging, it is free forger that class produces 13.7 times of skill, are manually the 5.3% of traditional handicraft, and combustion gas is using accounting for the 40.9% of traditional handicraft.

Specific embodiment:

Embodiment 1:

Hubbed flange die-forging forming processing method, the method are comprised the following steps:

A. blanking:Through checking qualified rustless steel rod iron(Preferably round steel), cutting stock weight as specified in technology for blanking In band sawing machine loading and unloading(Small dimension product can be justified with rustless steel light, directly use bar shears blanking), it is desirable to cutting stock weight is inclined Difference control is in the range of ± 1%.(This product cutting stock weight be 147.5kg, core material weight 39.7kg after forging, actual feed consumption 107.8kg, core material can do 6 " 300Lb WN products).

B. heat:Forge furnace adopts heat accumulating type cell-type gas-fired heater(2T, 3T die forging production line can select intermediate frequency Sensing heating complete set of equipments).It is provided with PLC control system, control firing rate, initial forging temperature, reaction temperature uniformity, furnace pressure Deng.Lower good material is added in forge furnace with operation machine, 1250 DEG C ± 20 DEG C are heated to by heating technological requirement, heat time heating time About 85 minutes.

C. blocking:Discharged from forge furnace with operation machine upset to the all-hydraulic free forging electrohydraulic hammers of 8T, initial forging temperature 1250 DEG C ± 20 DEG C, forging time about 10 15 seconds, cycle about 56 times reach the size of technological requirement.

D. die forging:With 16T die forging electrohydraulic hammers, 400kg rail industrial robots, workpiece is moved to work on 16T hammers from 8T hammers Make area, carry out die forging, 1050 DEG C ± 20 DEG C of final forging temperature, forging time 20 30 seconds, cycle 68 times, it is desirable to which blank is complete Die cavity is full of entirely.

E. trimming, punching:From JS31-1600 type closed type single point presses, compound trimming die.With the industry of 400kg rails Robot from 16T die hammers die forging after workpiece move on JS31-1600 type closed type single point presses, put positive position, enter Row trimming, punching.Trimming temperature>1000 DEG C, once complete trimming, punching.Blank, core material, overlap separate collection after completion Stack.

F. check:After being air cooled to room temperature, 100% checks forging's block dimension specification and surface quality

G. heat treatment:By solid solution treatment process requirement, heating, insulation, operation in 2 10T heat accumulating type cell-type gas furnaces Machine quick water-cooled under coming out of the stove to lower section tank.

H. check:Work inspection device hardness HB is randomly selected per melting batch:137-187.

I. labelling, warehouse-in, same to traditional handicraft.

Technology point:

Equipment choice:

Capital equipment die hammer and closed type single point press are selected:

Forging hammer tonnage:According to finish-forging work step need select forging hammer tonnage G(kg):G=(3.5—6.3)k·FAlways,

In formula:FAlwaysForging total deformation area, cm2, including forging area, punching core material and overlap area.K steel grades system Number, stainless steel material k select 1.25.

Closed type single point press:Closed type single point press, forge furnace, die hammer constitute the substantially single of die forging production Position unit.Combo press tonnage P(KN), can be selected according to forging hammer tonnage G, P=MG,

In formula:M combo coefficients, different with forging hammer tonnage size, M=800 1000KN/t are can use, is matched somebody with somebody with die hammer The clipping press of set

Forge furnace is selected:

Mini-plant such as 2T, 3T die hammer precision die forging is from non-oxidation or few Frequency Induction Heating for aoxidizing into suit Put.

Main equipment such as 6T, 10T, 16T die forging production line adopts regenerative gas chamber-type forge furnace.

Transported with dress reclaimer or industrial robot between heating, blocking, die forging, edge-cutting and hole-punching separation, each operation Defeated operation.

Mini-plant unit, such as 2T, 3T die forging line, the workpiece due to processing are fewer, using sprocket wheel carrier bar pipeline, enter Row workpiece is conveyed.

Main equipment unit, such as 6T, 10T, 16T die forging production line carry out workpiece using forging manipulator, industrial robot Take, operate.

Equipment for Heating Processing:

Select gas heat-accumulated type heat-treatment furnace.For the heat-treatment furnace of rustless steel solid solution, using cell-type regenerative gas stove. 1400 DEG C of furnace temperature of design, dress workpiece amount 10T × 2,175m3 ponds are provided with cooling water system, 10T dress reclaimers and forge furnace A set of control system is shared, strengthens coordinated signals.9 points of thermometrics, it is ensured that certainty of measurement ± 1 DEG C, temperature uniformity ± 10%, water Less than 50 DEG C of temperature.

For straight carbon steel, steel alloy heat-treatment furnace.Dress workpiece amount 20T, heat accumulating type Type Car-bottom Heat Treating Furnace are set.Design highest 1000 DEG C of temperature of production, 9 points of measurements, it is ensured that certainty of measurement ± 1 DEG C, temperature uniformity ± 10%.

Forging hammer vibration isolation:

Forging hammer can produce larger vibration in the course of the work, if improper to foundation of forging hammers design, vibration not only will be tight Ghost image rings the work of surrounding devices, reduces the stability of mill construction, or even can be detrimental to health, our open die forgings in 8T From the indirect vibration isolation by Guangzhou An Gu vibration isolation Environmental Protection Technology Co., Ltd in the basic engineering of Single arm and 16T die forging electrohydraulic hammers Device scheme.

The technical scheme (indirect vibration isolation) of 8 tons of free forging electrohydraulic hammer vibration isolators:

1st, the technical parameter of forging hammer:

Blow energy:280KJ,

Fall part mass:8.5T,

The maximum strike frequency:55 beats/min,

Overall mass:205T,

Configuration concrete quality block:10000×6000×5400(Weight is about 775T)

2nd, the technical parameter (indirect vibration isolation) of vibration isolator:

The technical scheme (indirect vibration isolation) of 16 tons of electro-hydraulic die hammer vibration isolators:

1st, the technical parameter of forging hammer:

Blow energy:400KJ

Fall part mass:18.5T+18.5T

The maximum strike frequency:40 beats/min

Overall mass:440T

Configuration concrete quality block:10000×8000×5600(Weight is about 1060T)

2nd, the technical parameter of vibration isolator(Vibration isolation indirectly)

Design of forging die

Die hammer design of forging die:

1. using open die forging, impressing forging, combination die is used.Mould bases dimensions is fixed, and products of different specifications changes the mold core.Forging die by Upper and lower two modules composition, is fastened in the dovetail groove of tup and die shoe by means of dovetail, drift and key block.

Dovetail:Module is made to be fixed on tup(Or anvil block)On, make dovetail bottom surface and tup(Or anvil block)Bottom surface is brought into close contact.

Drift:Module is made to position in left and right directions.

Key block:Module is made to position in fore-and-aft direction.

The design feature:Due to adopting open die forging, impressing forging, with the presence of overlap.The filling performance of impression is preferable.Die hammer is fixed Energy device, what its energy carried out autokinesis fall part, including tup, hammer stem and upper module etc..Can be by repeatedly having hammered Into deformation, it is particularly suitable for the production of stainless steel product.During die forging, blank axis direction is identical with beating position, metal edge height, There is plastic deformation simultaneously in width and length direction.

Between generally 5 ° 15 ° of draft angle.

Die forging radius of corner:The forging part round radius of steel(r)1.5-12mm, fillet radius are typically taken(R)Than outer Radius of corner is big 2-3 times.Depth of die cavity is deeper, and radius of corner value is bigger.Detect for the ease of molding and forging, radius of corner chi Very little form series, its standard is 1,1.5,2,2.5,3,4,5,6,8,10,12,15,20,25,30 grade mm.

Technical requirements using forging die:

First check for impression workmanship and whether installation dimension is qualified.

Forging die should be solid and reliable, and upper and lower mould die joint mutually balances each other, and dovetail highly should be greater than the depth of dovetail groove, Gap Δ=0.5-1mm.

Gap between adjustment tup and guide rail, on the premise of normal work is ensured, takes minima as far as possible.

Forging die should be preheating to 150-350 DEG C using before, should be incubated when pausing in using way.

Iron scale has a strong impact on forging quality and hammer die lif, must conscientiously remove the oxygen of heating blank surface before forging Change iron sheet.

Surface temperature when forging die works must not exceed 400 DEG C, too high for preventing forging die from heating up, should be to impression sprinkling cooling Lubricant.

Edge-cutting and hole-punching composite die is designed:

On the basis of drop stamping is built upon metal plastic deformation, at high temperature using the mould pair on forcing press Workpiece applies pressure so as to produce separation.So as to obtain a kind of pressure processing method of definite shape, size and performance.

The technique mainly uses edge-cutting and hole-punching compound die.

The above is only highly preferred embodiment of the present invention, the method for the present invention includes but is not limited to above-described embodiment, the present invention Unaccomplished matter, belong to the common knowledge of those skilled in the art.

Claims (7)

1. a kind of hubbed flange die-forging forming processing method, is characterized in that:The method is comprised the following steps:
A. blanking:Through checking qualified rustless steel rod iron, as specified in technology for blanking, cutting stock weight, in band sawing machine loading and unloading The control of cutting stock weight deviation is asked in the range of ± 1%;
B. heat:Lower good material is added in forge furnace with operation machine, 1250 DEG C ± 20 DEG C are heated to by heating technological requirement, 85 ± 10 minutes heat time heating times;
C. blocking:Discharged from forge furnace with operation machine upset to the all-hydraulic free forging electrohydraulic hammers of 8T, 1250 DEG C of initial forging temperature ± 20 DEG C, forging time 10 15 seconds, cycle 56 times reach the size of technological requirement;
D. die forging:Workpiece is moved to working area on 16T hammers from the all-hydraulic free forging electrohydraulic hammers of 8T, mould is carried out with die forging electrohydraulic hammer Forging, 1050 DEG C ± 20 DEG C of final forging temperature, forging time 20 30 seconds, cycle 68 times, it is desirable to which blank is completely filled with die cavity;
E. trimming, punching:From closed type single point press compound trimming die;
F. check:After being air cooled to room temperature, 100% checks forging's block dimension specification and surface quality;
G. heat treatment:By solid solution treatment process requirement, heating, insulation in 2 10T heat accumulating type cell-type gas furnaces, operation machine go out Stove quick water-cooled to the tank of lower section;
H. check:Work inspection device hardness HB is randomly selected per melting batch:137-187;
I. labelling, warehouse-in.
2. hubbed flange die-forging forming processing method according to claim 1, is characterized in that:Die forging described in step D The system of selection of Single arm tonnage is:According to finish-forging work step need select forging hammer tonnage G: G=(3.5—6.3)K·FAlways,
In formula:FAlwaysForging total deformation area is represented, unit is cm2, including forging area, punching core material and overlap area,
K represents steel grade coefficient, and when 0.25% carbon structural steels are less than using phosphorus content, K takes 0.9, when high using phosphorus content During the low-alloy steel of carbon structural steels and C≤0.25% in 0.25%, K takes 1, when the low-alloy using phosphorus content >=0.25% During structural steel, K takes 1.1, and when using high alloy-structural steel, rustless steel, K takes 1.25.
3. hubbed flange die-forging forming processing method according to claim 1 and 2, is characterized in that:Closing described in step E Formula one point press tonnage P, selectes according to forging hammer tonnage G:P=MG
In formula:M be combo coefficient, M=800 1000KN/t.
4. hubbed flange die-forging forming processing method according to claim 1 and 2, is characterized in that:Heat described in step G Process and adopt heat accumulating type cell-type gas furnace.
5. hubbed flange die-forging forming processing method according to claim 1 and 2, is characterized in that:Described blocking and institute Indirect vibration isolator is provided with the basis of the Single arm of the die forging that states.
6. hubbed flange die-forging forming processing method according to claim 1 and 2, is characterized in that:Forge in described die forging Mould is made up of upper and lower two modules, is fastened in the dovetail groove of tup and die shoe by means of dovetail, drift and key block, described swallow Tail:Module is fixed on tup or anvil block, dovetail bottom surface is brought into close contact with tup or anvil block bottom surface;Described drift:Make Module is positioned in left and right directions;Described key block:Module is made to position in fore-and-aft direction.
CN201410613167.5A 2014-11-05 2014-11-05 Hubbed flange die-forging forming processing method CN104785706B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410613167.5A CN104785706B (en) 2014-11-05 2014-11-05 Hubbed flange die-forging forming processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410613167.5A CN104785706B (en) 2014-11-05 2014-11-05 Hubbed flange die-forging forming processing method

Publications (2)

Publication Number Publication Date
CN104785706A CN104785706A (en) 2015-07-22
CN104785706B true CN104785706B (en) 2017-03-15

Family

ID=53551143

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410613167.5A CN104785706B (en) 2014-11-05 2014-11-05 Hubbed flange die-forging forming processing method

Country Status (1)

Country Link
CN (1) CN104785706B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105013994B (en) * 2015-08-13 2017-08-22 中国兵器工业第五九研究所 A kind of complicated streamline control manufacturing process for closing weight part
CN106624625A (en) * 2016-11-18 2017-05-10 江苏力野精工科技有限公司 Flange plate processing method
CN106825376A (en) * 2017-01-23 2017-06-13 温州电泰阀门有限公司 A kind of valve body forging technology
CN107186444A (en) * 2017-06-28 2017-09-22 江阴普洋法兰有限公司 A kind of hubbed flange processing technology
CN108480535B (en) * 2018-02-02 2019-08-23 陕西斯瑞新材料股份有限公司 A kind of manufacturing method of CuNiFe alloy neck welding method orchid
CN109093040A (en) * 2018-07-23 2018-12-28 江阴市澄东锻造有限公司 A kind of flange forging method of two phase stainless steel F53
CN111037243A (en) * 2018-10-11 2020-04-21 上海汽车变速器有限公司 Manufacturing method of parking gear of gearbox
CN109648266A (en) * 2018-12-29 2019-04-19 山东腾达紧固科技股份有限公司 A kind of rectangle adjusting nut processing technology
CN111069493A (en) * 2019-12-03 2020-04-28 东台市润丰法兰制造有限公司 Neck-equipped welding neck flange

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1060415C (en) * 1997-04-25 2001-01-10 张应宪 Technological process of manufacturing steel flange blank
CN101927419A (en) * 2009-06-19 2010-12-29 扬州市龙洋法兰管业制造有限公司 Flange processing process
CN102009114A (en) * 2010-11-04 2011-04-13 广东省韶铸集团有限公司 Forging process for producing mushroom-shaped flange on die forging hammer
CN102049456B (en) * 2010-11-30 2012-11-14 重庆理工大学 Multi-ram die forging process method and die for 40Cr-steel frame type parts
CN103272981B (en) * 2013-06-17 2015-03-25 南通普蒙盛机械制造有限公司 Bidirectional parting continuous forging system of forming die of pipe end upsetting device

Also Published As

Publication number Publication date
CN104785706A (en) 2015-07-22

Similar Documents

Publication Publication Date Title
CN100423858C (en) Casting high ferrochrome or casting high chromium steel roll for welding steel pipe
CN102418042B (en) Novel manufacturing process of phi 300 mm-phi 700 mm high-carbon high-chromium cold-working die steel forged round steel
CN102350476B (en) Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel
Kopp Some current development trends in metal-forming technology
CN101660098B (en) Hot-rolling seamless steel pipe applicable to high temperature of 580-620 DEG C and high pressure of 24-30MPa and production method thereof
CN103409642B (en) Processing method of low yield ratio high strength titanium coiled plate for heat exchanger
CN104551673B (en) A kind of method that ply rolling produces plate in ultra-thin specification wide cut
CN101538684B (en) Stainless steel tube for brake system of rail vehicle and method for producing same
CN104057263B (en) Large-scale locomotive connecting rod forging technology
CN105755391A (en) Novel high-speed steel material and preparation process thereof
CN104561696B (en) High ferro 5083 aluminum alloy plate materials and production method thereof
CN102181793B (en) Process for manufacturing steel forge piece of vertical conveying pipe of deep sea oil extraction equipment
CN102699637B (en) Process for forging main shaft flange of wind driven generator
CN104561815B (en) A kind of high homogenizing big specification superhigh intensity rod iron and production method thereof
KR101838424B1 (en) High toughness and high tensile strength thick steel plate and production method therefor
RU2527578C2 (en) PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 88,9×6,45×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
RU2317865C2 (en) Method for producing ingot-blanks by electroslag refining of low-ductile steel containing boron and for rolling tubes of such blanks in tube rolling plants with pilger mills for further conversion of tubes to hexahedral tube-blanks for compacted storage of waste nuclear fuel
CN104858344B (en) A kind of manufacture method of large-scale driving wheel forging
CN101439348A (en) Technological process for producing super-thick plate
CN103192012B (en) A kind of 20CrMnTi pinion steel rolling process
CN102517491B (en) Cylinder barrel of oil cylinder of crane and processing process thereof
CN101356029B (en) Equipment for forging four-hammer
CN104400344A (en) Bolt manufacturing technology
CN102756251A (en) High-strength steel plate hot-stamping molding production line and production process thereof
CN102896466B (en) Production method of 150-400mm thick steel plate for plastic moulds

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
EXSB Decision made by sipo to initiate substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant