CN107876689A - A kind of life-prolonging method of crank axle bending and upsetting shaping dies - Google Patents
A kind of life-prolonging method of crank axle bending and upsetting shaping dies Download PDFInfo
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- CN107876689A CN107876689A CN201711084035.8A CN201711084035A CN107876689A CN 107876689 A CN107876689 A CN 107876689A CN 201711084035 A CN201711084035 A CN 201711084035A CN 107876689 A CN107876689 A CN 107876689A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000007493 shaping process Methods 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000005461 lubrication Methods 0.000 claims abstract description 12
- 239000003755 preservative agent Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 239000011162 core material Substances 0.000 claims description 33
- 238000005496 tempering Methods 0.000 claims description 19
- 238000010791 quenching Methods 0.000 claims description 16
- 238000005242 forging Methods 0.000 claims description 14
- 230000000171 quenching effect Effects 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000007943 implant Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 240000002853 Nelumbo nucifera Species 0.000 abstract description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 abstract description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 208000025599 Heat Stress disease Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 position mould Substances 0.000 description 1
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
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/48—Ion implantation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of life-prolonging method of crank axle bending and upsetting shaping dies, it is split combination structure by the mold design of bent axle, die crank working portion is made up of multiple modules such as bending die, positioning mould, finishing die, thrust moulds, wherein finishing die is inlayed by die sleeve and core rod and formed again, the structure design of shaped portion is two symmetrical die cavities, core portion is done reinforcing heat treatment by alternation to bear high temperature and high load lotus effect.The the first crank throw blank heated is put into one of die cavity of the symmetrical die cavity of mould, after matched moulds by mould first when work is formed, after the bending upsetting extrusion for completing the first crank throw, product is taken out, is blown away the oxide skin in die cavity with valve, the spray lubrication heat preserving agent into die cavity.The present invention can make the continuously work more than 2000 of crank axle bending and upsetting shaping dies, and production cost is greatly reduced, and improve production efficiency, treatment process is easy, application easy to spread.
Description
Technical field
The present invention relates to precision plastic forming technical field, more particularly to a kind of crank axle bending and upsetting shaping dies is lengthened the life
Method.
Background technology
It is one of current massive engine machine crankshaft manufacturing technology focus that bending and upsetting legal system, which makes stagger crankshaft, with traditional hot-die
Forging unitary mould structure is compared, and its mould structure is multilayer separate assembling, and combining structure can improve mould bearing capacity, drop
Low mold materials expense, the convenient and cycle that repairs a die are short；But due to the loading characteristic of bending and upsetting shaping dies, mold work condition
Extremely severe, same die cavity heats repeatedly, under the alternate load effect of complexity, while also expanded with heat and contract with cold, heat fatigue, abrasion
Deng influence, thin-wall construction stress condition in upsetting squeeze crank throw is extremely severe, is squeezed, bends a variety of load effects, same type
Chamber bears big load repeatedly.Once secondary mould, often service life only tens needs to change, and changes the mold cycle length, costly,
Have a strong impact on production progress.In order to improve die life, existing process often designs multiple preform to improve mould work
Condition, but this method does not solve the problems, such as mould stress fundamentally, and also by complex technical process, technique controlling difficulty is more
Greatly.
The content of the invention
The technical problem to be solved in the present invention is：There is provided that a kind of simple process, cost are low, shorten the mould of process cycle prolongs
Longevity method.
To solve above-mentioned technical problem：The present invention proposes a kind of life-prolonging method of crank axle bending and upsetting shaping dies, bag
Include following steps：
A kind of life-prolonging method of crank axle bending and upsetting shaping dies, it is characterised in that：Comprise the following steps：
Step 1: forging die base
Shaping die cavity core material H13 steel is forged to core rod size with forging ratio not less than 3；
Step 2: annealing
The forging die blank that step 1 obtains is made annealing treatment；
Step 3: roughing die cavity
The annealing mold base that step 2 obtains is reserved into 2mm to core rod size according to cavity dimension roughing；
Step 4: Tempering and Quenching
The roughing core rod that step 3 obtains is heat-treated, heat treatment hardness to HRC42-HRC48；
Step 5: finishing die cavity
Core rod after step 4 Tempering and Quenching is carried out according to cavity dimension to be refined to desired size；
Step 6: surface treatment
Duplex surface intensive treatment is carried out using the technique of surfaces nitrided+C/Ti dual implants to the mould finished；
Step 5: remaining module is processed
To remaining module in addition to core rod, prepared using the quenched rear finishing of 45 steel；
Step 6: shaping work
During shaping, the first crank throw blank heated is put into a certain die cavity of die forming first, after matched moulds, completes first
The bending upsetting extrusion of crank throw；Then product is taken out, spray lubrication heat preserving agent, the blank for second being turned part add into the die cavity
Heat, it is put into after the completion of heating in the symmetrical another die cavity of mould, matched moulds, completes the bending upsetting extrusion of the second crank throw, take
After going out product, the spray lubrication heat preserving agent into the die cavity repeats process above again, and die cavity alternation is whole until completing
The shaping of bent axle whole crank throw.
Mould in the step 1 to step 5 is combined type mosaic texture, and the mould for participating in shaping is combined type.
Technology for Heating Processing is double circulation quenching+tempering in the step 4：（1160 DEG C × 1h quenches+600 DEG C × 2h
Tempering）+（1040 DEG C × 1h quenches+600 DEG C × 2h tempering）.
In the step 6, into die cavity, spray lubrication heat preserving agent is a kind of binding agent, and its composition is：5%~10% graphite,
10%~30% glass dust, 3%~5% molybdenum disulfide, 1%~5% borax anhydrous, 1%~5% Na2SiO3, 20%~40%
Epoxy resin, 10%~30% dimethylbenzene, it is weight ratio above.
The invention has the advantages that：
1st, because the present invention is combined type mosaic texture, the mould for participating in shaping is combined type, wherein except tradition is by core rod
With a secondary mould of die sleeve composition, whole die cavity forms whole set of die by 10 secondary moulds, makes whole set of die by traditional overall mould
Whole point zero of switching to of tool, uniform force and flexibility protrude, and the convenient and cycle that repairs a die is shorter.
2nd, because the present invention is dimorphism chamber, traditional dimorphism chamber is usually for one-mold multiple-member, improves production efficiency, into
Two die cavities work simultaneously during shape, with ensure it is once-forming go out multiple identical workpiece of shape.And the present invention then with tradition
Technique is entirely different, and its two die cavity designed replaces stress and is heated at work, and main purpose is to improve mold cavity to hold
The operating mode of continuous high temperature and top load, significantly improves die life.
3rd, because the present invention uses double circulation quenching+tempering, this hair different from traditional primary quenching+tempering process
The bright process cycles for quenching+tempering twice, can generate the good carboritride of high-temperature stability, with normative heat treatment phase
Than intensity improves 9%~10%, and elongation percentage improves 10%~12%, and impact flexibility improves 20%.
4th, because the present invention is using lubrication heat preserving agent, die surface is sprayed on during work and forms the thin of one layer of continuous uniform
Film, it, which is acted on, mainly prevents die cavity fast cooling, to avoid the violent temperature difference from mold cavity surface is acted on by alternate stress,
Produce fatigue failure.
5th, the present invention is inlayed using combined type, dimorphism cavity configuration and double circulation quenching+tempering are heat-treated, die life
It can improve to more than 2000.
6th, traditional hot forging unitary mould structure raw material require high, and difficulty of processing is big, and process is more, and cost is high；And use
Other modules beyond raw material core rod needed for the present invention are 45 steel, overall cost low compared with unitary mould more than 50%.
Brief description of the drawings
Fig. 1 is to bend upper and lower mould in mould；
Fig. 2 is to shape upper and lower mould in mould；
Fig. 3 is that mould stops to push away upper and lower mould；
Fig. 4 is to position upper and lower mould in mould；
Fig. 5 is mold work schematic diagram.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, it is necessary to it is pointed out here that, implement in detail below
Mode is served only for that the present invention is further detailed, it is impossible to limiting the scope of the invention is interpreted as, the field
Those of ordinary skill can make some nonessential modifications and adaptations according to foregoing invention content to the present invention.
Fig. 1 is into Fig. 4, it can be seen that the mould used is respectively provided with two die cavities, is used alternatingly, and can increase the longevity of mould
Life.Fig. 5 is the operating diagram of mould at work.
Embodiment 1：
A kind of life-prolonging method of RSV92-C crank axle bending and upsettings shaping dies, comprises the following steps：
1st, H13 steel ingots are forged to φ 500mm × 130mm core rod approximate sizes with forging ratio 3.7；
2nd, core rod forging stock is annealed by 1050 DEG C ± 20 DEG C of temperature；
3rd, the core rod forging stock after annealing is reserved into 2mm to core rod size according to cavity dimension roughing；
4th, by the complete core rod of roughing according to " double circulation quenching+tempering（1160 DEG C of ± 20 DEG C × 1h quench+600 DEG C × 2h
Tempering）+（1040 DEG C of ± 20 DEG C × 1h quench+600 DEG C × 2h tempering）" technique carry out it is quenched；
5th, the core rod after will be quenched is finished according to cavity dimension, and two cavity dimensions are consistent and are distributed along Central Symmetry；
6th, duplex surface intensive treatment is carried out using the technique of surfaces nitrided+C/Ti dual implants to the mould finished；
7th, to remaining shaping, thrust and locating module in addition to core rod, prepared using the quenched rear finishing of 45 steel；
8th, the first crank throw blank heated is put into wherein the one of the symmetrical die cavity of mould by mould first when work is formed
In individual die cavity, after matched moulds, after the bending upsetting extrusion for completing the first crank throw, product is taken out, with valve by the oxide skin in die cavity
Blow away, and the spray lubrication heat preserving agent into die cavity.
9th, by the blank heating of the second throw portion, it is put into the symmetrical another die cavity of mould, closes after the completion of heating
Mould, the bending upsetting extrusion of the second crank throw is completed, after taking out product, blown away the oxide skin in die cavity with valve, and to die cavity
Interior spray lubrication heat preserving agent.Two die cavity alternations, the shaping until completing whole bent axle whole crank throw.
10th, after cooling down in atmosphere, mould is checked, if there is the defects of crackle, chipping to occur.
Using the RSV92-C bent axles bending and upsetting mould of life-prolonging method of the present invention, do not sent out after 2000, bent axle is shaped
Raw destruction situation, in three crank throw of 2128 bent axles of shaping, levorotation chamber has crackle, due to only changing core portion, changes
The mould cycle is time-consuming only 4 days.
Embodiment 2：
A kind of life-prolonging method of JDB26-C crank axle bending and upsettings shaping dies, comprises the following steps：
1st, H13 steel ingots are forged to φ 500mm × 150mm core rod approximate sizes with forging ratio 3.6；
2nd, core rod forging stock is annealed by 1050 DEG C ± 20 DEG C of temperature；
3rd, the core rod forging stock after annealing is reserved into 2mm to core rod size according to cavity dimension roughing；
4th, by the complete core rod of roughing according to " double circulation quenching+tempering（1160 DEG C of ± 20 DEG C × 1h quench+600 DEG C × 2h
Tempering）+（1040 DEG C of ± 20 DEG C × 1h quench+600 DEG C × 2h tempering）" technique carry out it is quenched；
5th, the core rod after will be quenched is finished according to cavity dimension, and two cavity dimensions are consistent and are distributed along Central Symmetry；
6th, duplex surface intensive treatment is carried out using the technique of surfaces nitrided+C/Ti dual implants to the mould finished；
7th, to remaining shaping, thrust and locating module in addition to core rod, prepared using the quenched rear finishing of 45 steel；
8th, the first crank throw blank heated is put into wherein the one of the symmetrical die cavity of mould by mould first when work is formed
In individual die cavity, after matched moulds, after the bending upsetting extrusion for completing the first crank throw, product is taken out, with valve by the oxide skin in die cavity
Blow away, the spray lubrication heat preserving agent into die cavity.
9th, by the blank heating of the second throw portion, it is put into the symmetrical another die cavity of mould, closes after the completion of heating
Mould, the bending upsetting extrusion of the second crank throw is completed, after taking out product, repeat above to be blown the oxide skin in die cavity with valve again
Walk, the process of spray lubrication heat preserving agent into die cavity, two die cavity alternations, until complete whole bent axle whole crank throw into
Shape.
10th, after cooling down in atmosphere, mould is checked, if there is the defects of crackle, chipping to occur.
Using the JDB26-C bent axles bending and upsetting mould of life-prolonging method of the present invention, do not sent out after 2000, bent axle is shaped
Raw destruction situation, in first crank throw of 2212 bent axles of shaping, chipping occurs for levorotation chamber, due to only changing core portion, mold changing
Cycle is time-consuming only 3 days.
It by the mold design of bent axle is split combination structure that the present invention, which is, and die crank working portion is by bending die, fixed
Multiple module compositions such as position mould, finishing die, thrust mould, wherein finishing die are inlayed by die sleeve and core rod and formed again, the choosing of core rod material
With high-quality mould steel, the structure design of shaped portion is two symmetrical die cavities, and high temperature and high load lotus is born in alternation
Effect, while core portion is done into reinforcing heat treatment.
Using the present invention, the continuously work more than 2000 of crank axle bending and upsetting shaping dies can be made, production is greatly reduced
Cost, production efficiency is improved, treatment process is easy, application easy to spread.
Claims (5)
- A kind of 1. life-prolonging method of crank axle bending and upsetting shaping dies, it is characterised in that：Comprise the following steps：Step 1: forging die baseShaping die cavity core material H13 steel is forged to core rod size with forging ratio not less than 3；Step 2: annealingThe forging die blank that step 1 obtains is made annealing treatment；Step 3: roughing die cavityThe annealing mold base that step 2 obtains is reserved into 2mm to core rod size according to cavity dimension roughing；Step 4: Tempering and QuenchingThe roughing core rod that step 3 obtains is heat-treated, heat treatment hardness to HRC42-HRC48；Step 5: finishing die cavityCore rod after step 4 Tempering and Quenching is carried out according to cavity dimension to be refined to desired size；Step 6: surface treatmentDuplex surface intensive treatment is carried out using the technique of surfaces nitrided+C/Ti dual implants to the mould finished；Step 5: remaining module is processedTo remaining module in addition to core rod, prepared using the quenched rear finishing of 45 steel；Step 6: shaping workDuring shaping, the first crank throw blank heated is put into a certain die cavity of die forming first, after matched moulds, completes first The bending upsetting extrusion of crank throw；Then product is taken out, spray lubrication heat preserving agent, the blank for second being turned part add into the die cavity Heat, it is put into after the completion of heating in the symmetrical another die cavity of mould, matched moulds, completes the bending upsetting extrusion of the second crank throw, take After going out product, the spray lubrication heat preserving agent into the die cavity repeats process above again, and die cavity alternation is whole until completing The shaping of bent axle whole crank throw.
- 2. the life-prolonging method of crank axle bending and upsetting shaping dies according to claim 1, it is characterised in that：The step 3rd, Step 4: processing cavity in step 5, for several moulds composition, the dimorphism chamber that two shapes are identical, symmetrical.
- 3. the life-prolonging method of crank axle bending and upsetting shaping dies according to claim 1, it is characterised in that：The step 1 Mould into step 5 is combined type mosaic texture, and the mould for participating in shaping is combined type.
- 4. the life-prolonging method of crank axle bending and upsetting shaping dies according to claim 1, it is characterised in that：The step 4 Middle Technology for Heating Processing is double circulation quenching+tempering：（1160 DEG C × 1h quenches+600 DEG C × 2h tempering）+（1040 DEG C × 1h quenches + 600 DEG C × 2h of fire is tempered）.
- 5. the life-prolonging method of crank axle bending and upsetting shaping dies according to claim 1, it is characterised in that：The step 6 In, into die cavity, spray lubrication heat preserving agent is a kind of binding agent, and its composition is：5%~10% graphite, 10%~30% glass dust, 3%~5% molybdenum disulfide, 1%~5% borax anhydrous, 1%~5% Na2SiO3, 20%~40% epoxy resin, 10%~30% Dimethylbenzene, be weight ratio above.
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|---|---|---|---|
| CN201711084035.8A CN107876689B (en) | 2017-11-07 | 2017-11-07 | A kind of life-prolonging method of crank axle bending and upsetting shaping dies |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711084035.8A CN107876689B (en) | 2017-11-07 | 2017-11-07 | A kind of life-prolonging method of crank axle bending and upsetting shaping dies |
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| Publication Number | Publication Date |
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| CN107876689A true CN107876689A (en) | 2018-04-06 |
| CN107876689B CN107876689B (en) | 2019-06-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202387A (en) * | 2018-11-14 | 2019-01-15 | 安徽宁国中鼎模具制造有限公司 | A kind of thin-wall part processing technology |
| CN110773965A (en) * | 2019-10-29 | 2020-02-11 | 中国兵器工业第五九研究所 | Metal die for cold extrusion forming of high-viscosity material and preparation method |
| CN111607757A (en) * | 2020-05-25 | 2020-09-01 | 东风汽车紧固件有限公司 | Surface treatment method of 7Cr7Mo2V2Si high-temperature upsetting die |
| CN112575166A (en) * | 2020-12-30 | 2021-03-30 | 江苏南洋中京科技有限公司 | Heat treatment method of outer star wheel forging die |
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| WO2016027208A1 (en) * | 2014-08-18 | 2016-02-25 | Bharat Forge Limited | A method of forging complex parts from continuous cast billets |
| CN106853503A (en) * | 2017-02-27 | 2017-06-16 | 辽宁五八内燃机配件有限公司 | The positioning combined mould in crankshaft crank upsetting shaping axial direction |
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2017
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| KR20130118534A (en) * | 2012-04-20 | 2013-10-30 | 현대중공업 주식회사 | Manufacturing process for die forging crank shafts |
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| JP2014079801A (en) * | 2012-10-18 | 2014-05-08 | Toyota Motor Corp | Hot forging device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202387A (en) * | 2018-11-14 | 2019-01-15 | 安徽宁国中鼎模具制造有限公司 | A kind of thin-wall part processing technology |
| CN110773965A (en) * | 2019-10-29 | 2020-02-11 | 中国兵器工业第五九研究所 | Metal die for cold extrusion forming of high-viscosity material and preparation method |
| CN111607757A (en) * | 2020-05-25 | 2020-09-01 | 东风汽车紧固件有限公司 | Surface treatment method of 7Cr7Mo2V2Si high-temperature upsetting die |
| CN111607757B (en) * | 2020-05-25 | 2022-12-06 | 东风汽车紧固件有限公司 | Surface treatment method for manufacturing high-temperature upsetting die by 7Cr7Mo2V2Si |
| CN112575166A (en) * | 2020-12-30 | 2021-03-30 | 江苏南洋中京科技有限公司 | Heat treatment method of outer star wheel forging die |
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