CN104785706B - Hubbed flange die-forging forming processing method - Google Patents
Hubbed flange die-forging forming processing method Download PDFInfo
- 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
Links
- 238000005242 forging Methods 0.000 title claims abstract description 123
- 238000003672 processing method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 241001081830 Degeneriaceae Species 0.000 claims abstract description 32
- 239000000463 materials Substances 0.000 claims abstract description 15
- 238000004080 punching Methods 0.000 claims abstract description 13
- 238000009966 trimming Methods 0.000 claims abstract description 10
- 230000000903 blocking Effects 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000002372 labelling Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000005516 engineering processes Methods 0.000 claims description 10
- 238000000034 methods Methods 0.000 claims description 10
- 239000007789 gases Substances 0.000 claims description 9
- 239000011162 core materials Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound 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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
- B21K1/16—Making machine elements fittings parts of pipe or hose couplings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Abstract
Description
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)
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| 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 |
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| 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 |
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| 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 |
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