CN105642802B - A kind of diameter difference step forged shaft loose tool manufacturing process - Google Patents
A kind of diameter difference step forged shaft loose tool manufacturing process Download PDFInfo
- Publication number
- CN105642802B CN105642802B CN201410629479.5A CN201410629479A CN105642802B CN 105642802 B CN105642802 B CN 105642802B CN 201410629479 A CN201410629479 A CN 201410629479A CN 105642802 B CN105642802 B CN 105642802B
- Authority
- CN
- China
- Prior art keywords
- loose tool
- rod
- forging
- step shaft
- diameter end
- 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.)
- Expired - Fee Related
Links
Abstract
A kind of diameter difference step forged shaft loose tool manufacturing process, step is as follows：1. blanking；By calculating, bar format diameter D is cutRod, length LRod, specific formula for calculation is：The size and bar specification of loose tool are calculated by below equation；1/4πDRod 2×LMould=1/4 π d2×(L‑L1+R)；1/4πDRod 2×(LRod‑LMouldThe π D of)=1/42×L1；Meet simultaneously：(LRod‑LMould)/DRod＜ 2.5, LMould＞ 1/2DRod；The diameter difference step forged shaft loose tool manufacturing process greatly improves the utilization rate of material, reduces forging percent defective, while improving structure property.The diameter difference step forged shaft loose tool manufacturing process stock utilization produced using this method improved 30% 55% more originally.
Description
Technical field
The present invention relates to metallurgical system technical field of forging, a kind of diameter difference step forged shaft loose tool is specifically provided
Manufacturing process.
Background technology
At present, it is main direct using local pulling or loose tool when having the forged shaft of step using flat-die hammer forging
The method of shaping.But, when step difference between both ends is larger, during more than 2 times, two methods are not applied to.Pulled out according to local
Long method, because diameter differs larger, causes to need binder length to be less than original diameter 1/2, pulling process medial end portions can produce interior
Concave is as to prevent this phenomenon from producing, it is necessary to lengthen binder length, the forging's block dimension so obtained is far beyond forging drawing
Required size, also needs to be cut off during following process, stock utilization is very low；And use the side of loose tool direct forming
Method, because diameter difference is larger, the draw ratio of crushed element will often exceed forging ratio, be easy to unstability during jumping-up and bend, produce
Raw waste product.Meanwhile, both manufacturing process are all local deformation, it is impossible to ensure overall structural homogenity and mechanical performance.
People are highly desirable to obtain a kind of excellent diameter difference step forged shaft loose tool manufacturing process of technique effect.
The content of the invention
It is an object of the invention to provide a kind of diameter difference step forged shaft loose tool manufacturing process, prevent defect from producing same
The utilization rate of Shi Tigao materials.
The diameter difference step forged shaft loose tool manufacturing process step is as follows：
1. blanking；
By calculating, bar format diameter D is cutRod, length LRod, specific formula for calculation is：
The size and bar specification of loose tool are calculated by below equation；
1/4πDRod 2×LMould=1/4 π d2×(L-L1+R)；
1/4πDRod 2×(LRod-LMouldThe π D of)=1/42×L1；
Meet simultaneously：(LRod-LMould)/DRod＜ 2.5, LMould＞ 1/2DRod；
Wherein, D is Step Shaft larger diameter end diameter, while being also fetal membrane outer wall dimension；D is that Step Shaft smaller diameter end is straight
Footpath；L is Step Shaft total length；L1For Step Shaft larger diameter end length；LMouldFor the length of loose tool；R be Step Shaft larger diameter end and
The knuckle of smaller diameter end；
2. jumping-up；
Loose tool 3 is preheated, 150 DEG C -300 DEG C of preheating temperature scope, preheating time >=30min, bar is put into and added
Heated in hot stove, 800 DEG C -900 DEG C of preheating temperature scope, the insulation shortest time presses 0.25mm/min-0.6mm/min coefficients
Calculated, the upper limit adds 30min, 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.3mm/min-1.5mm/min
Coefficient is calculated, and is taken out after insulation, and setting is placed on lower hammer anvil 4, bar is touched using upper hammer anvil 1, by surface scale
Knock as forging, then put forging in the loose tool 3 after preheating into, referring specifically to accompanying drawing 4；By loose tool 3 and forging smoothly
It is placed on lower hammer anvil, upper hammer anvil is moved downward, by the forging jumping-up outside loose tool, referring specifically to accompanying drawing 5；Work as L1Size is met
When, to ensure forging Step Shaft smaller diameter end and Step Shaft larger diameter end with one heart, and also to eliminate due in upsetting process
The outer circle drum produced, forging 2 and loose tool 3 is lain on lower hammer anvil 4 together, upper hammer anvil 1 is moved downward, and carries out rolling cylindrical,
It is final to ensure Step Shaft larger diameter end diameter D and Step Shaft larger diameter end length L1Size；Referring specifically to accompanying drawing 6；
3. pull out；
Forging 2 is melted down into heating, 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.15mm/min-1.5mm/
Min coefficients are calculated, and are taken out after insulation, are clamped Step Shaft larger diameter end and pulled out, referring specifically to accompanying drawing 7, until step
Axle smaller diameter end size d and Step Shaft total length L reach requirement, referring specifically to accompanying drawing 8, to ensure forging Step Shaft larger diameter end
It is concentric greatly with Step Shaft smaller diameter end, during pulling by the way of spiral upset is sent into；
4. shaping；
Forging is erected on lower hammer anvil and carries out shaping, referring specifically to accompanying drawing 8；During pulling outStep ShaftSmaller diameter end
The cydariform of generation carries out smooth.
It need to consider following factor when forging blanking specification and loose tool Size calculation：First, it is equal according to volume before and after deformation
Principle carries out calculation material.2nd, larger diameter end.This part shapes outside loose tool, to prevent that unstability causes bending during jumping-up, is exposed at
Forging's block dimension draw ratio outside loose tool is no more than 2.5；3rd, smaller diameter end.This part is reserved in loose tool, larger diameter end chi
It is very little meet require after, then forging in loose tool pulled out, is finally reached smaller diameter end size and requires, for during preventing pulling
End produces indent phenomenon, and loose tool height dimension should be not less than the 1/2 of diameter of forgings；4th, it is to prevent the large and small diameter of upsetting process
There is decentraction problem in end, needs after upset forging, and it is cylindrical that forging carries out together with loose tool to rolling, so, just must be by loose tool gabarit
It is dimensioned to consistent with larger diameter end；5th, in forging process, fillet is difficult to eliminate at large and small diameter switching, and is accounted for very much
Material, is calculated, the volume accounted at fillet can increase in smaller diameter end length direction by UG, and numerical value is equal in magnitude i.e. with fillet
Can.
The diameter difference step forged shaft loose tool manufacturing process greatly improves the utilization rate of material, reduces forging waste product
Rate, while improving structure property.Stock utilization improves 35%-55% more originally.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the present invention is further detailed explanation：
Fig. 1 is forging schematic diagram；
Fig. 2 is fetal membrane base schematic diagram；
Fig. 3 is bar schematic diagram；
Fig. 4 is forging production process I；
Fig. 5 is forging production process II；
Fig. 6 is forging production process III；
Fig. 7 is forging production process IV；
Fig. 8 is forging production process V；
Fig. 9 is forging production process VI.
Embodiment
Embodiment 1
The diameter difference step forged shaft loose tool manufacturing process step is as follows：
1. blanking；
By calculating, bar format diameter D is cutRod, length LRod, specific formula for calculation is：
The size and bar specification of loose tool are calculated by below equation；
1/4πDRod 2×LMould=1/4 π d2×(L-L1+R)；
1/4πDRod 2×(LRod-LMouldThe π D of)=1/42×L1；
Meet simultaneously：(LRod-LMould)/DRod＜ 2.5, LMould＞ 1/2DRod；
Wherein, D is Step Shaft larger diameter end diameter, while being also fetal membrane outer wall dimension；D is that Step Shaft smaller diameter end is straight
Footpath；L is Step Shaft total length；L1For Step Shaft larger diameter end length；LMouldFor the length of loose tool；R be Step Shaft larger diameter end and
The knuckle of smaller diameter end；
2. jumping-up；
Loose tool 3 is preheated, 150 DEG C -300 DEG C of preheating temperature scope, preheating time >=30min, bar is put into and added
Heated in hot stove, 800 DEG C -900 DEG C of preheating temperature scope, the insulation shortest time presses 0.25mm/min-0.6mm/min coefficients
Calculated, the upper limit adds 30min, 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.3mm/min-1.5mm/min
Coefficient is calculated, and is taken out after insulation, and setting is placed on lower hammer anvil 4, bar is touched using upper hammer anvil 1, by surface scale
Knock as forging, then put forging in the loose tool 3 after preheating into, referring specifically to accompanying drawing 4；By loose tool 3 and forging smoothly
It is placed on lower hammer anvil, upper hammer anvil is moved downward, by the forging jumping-up outside loose tool, referring specifically to accompanying drawing 5；Work as L1Size is met
When, to ensure forging Step Shaft smaller diameter end and Step Shaft larger diameter end with one heart, and also to eliminate due in upsetting process
The outer circle drum produced, forging 2 and loose tool 3 is lain on lower hammer anvil 4 together, upper hammer anvil 1 is moved downward, and carries out rolling cylindrical,
It is final to ensure Step Shaft larger diameter end diameter D and Step Shaft larger diameter end length L1Size；Referring specifically to accompanying drawing 6；
3. pull out；
Forging 2 is melted down into heating, 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.15mm/min-1.5mm/
Min coefficients are calculated, and are taken out after insulation, are clamped Step Shaft larger diameter end and pulled out, referring specifically to accompanying drawing 7, until step
Axle smaller diameter end size d and Step Shaft total length L reach requirement, referring specifically to accompanying drawing 8, to ensure forging Step Shaft larger diameter end
It is concentric greatly with Step Shaft smaller diameter end, during pulling by the way of spiral upset is sent into；
4. shaping；
Forging is erected on lower hammer anvil and carries out shaping, referring specifically to accompanying drawing 8；During pulling outStep ShaftSmaller diameter end
The cydariform of generation carries out smooth.
It need to consider following factor when forging blanking specification and loose tool Size calculation：First, it is equal according to volume before and after deformation
Principle carries out calculation material.2nd, larger diameter end.This part shapes outside loose tool, to prevent that unstability causes bending during jumping-up, is exposed at
Forging's block dimension draw ratio outside loose tool is no more than 2.5；3rd, smaller diameter end.This part is reserved in loose tool, larger diameter end chi
It is very little meet require after, then forging in loose tool pulled out, is finally reached smaller diameter end size and requires, for during preventing pulling
End produces indent phenomenon, and loose tool height dimension should be not less than the 1/2 of diameter of forgings；4th, it is to prevent the large and small diameter of upsetting process
There is decentraction problem in end, needs after upset forging, and it is cylindrical that forging carries out together with loose tool to rolling, so, just must be by loose tool gabarit
It is dimensioned to consistent with larger diameter end；5th, in forging process, fillet is difficult to eliminate at large and small diameter switching, and is accounted for very much
Material, is calculated, the volume accounted at fillet can increase in smaller diameter end length direction by UG, and numerical value is equal in magnitude i.e. with fillet
Can.
The diameter difference step forged shaft loose tool manufacturing process greatly improves the utilization rate of material, reduces forging waste product
Rate, while improving structure property.Stock utilization improves 35%-55% more originally.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, and difference is：
Forging's block dimension D=φ 355mm, L1=100mm, L=460mm, d=φ 150mm, are calculated by formula：
1/4πDRod 2×LMould=1/4 π d2×(L-L1+R)；
1/4πDRod 2×(LRod-LMouldThe π D of)=1/42×L1；
Meet simultaneously：(LRod-LMould)/DRod＜ 2.5, LMould＞ 1/2DRod；
Bar format diameter is cut for DRod=φ 220mm, length is LRod=465mm, the size L of loose toolMould=175mm.Adopt
It is 221kg with the consumption of conventional method raw material single-piece, uses after the present embodiment method that material consumption is 138.7kg, material use
Rate improves 37% more originally.
Claims (3)
1. a kind of diameter difference step forged shaft loose tool manufacturing process, it is characterised in that：The diameter difference Step Shaft class forging
Part loose tool manufacturing process step is as follows：
1. blanking；
By calculating, bar format diameter D is cutRod, length LRod, specific formula for calculation is：
The size and bar specification of loose tool are calculated by below equation；
1/4πDRod 2×LMould=1/4 π d2×(L-L1+R)；
1/4πDRod 2×(LRod-LMouldThe π D of)=1/42×L1；
Meet simultaneously：(LRod-LMould)/DRod＜ 2.5, LMould＞ 1/2DRod；
Wherein, D is Step Shaft larger diameter end diameter, while being also fetal membrane outer wall dimension；D is Step Shaft smaller diameter end diameter；L is
Step Shaft total length；L1For Step Shaft larger diameter end length；LMouldFor the length of loose tool；R is Step Shaft larger diameter end and minor diameter
The knuckle at end；
2. jumping-up；
Loose tool (3) is preheated, 150 DEG C -300 DEG C of preheating temperature scope, puts bar into heating at preheating time >=30min
Heated in stove, 800 DEG C -900 DEG C of preheating temperature scope, the insulation shortest time is entered by 0.25mm/min-0.6mm/min coefficients
Row is calculated, and the upper limit adds 30min, and 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.3mm/min-1.5mm/min systems
Number is calculated, and is taken out after insulation, and setting is placed on lower hammer anvil (4), bar is touched using upper hammer anvil (1), by surface oxidation
Skin is knocked as forging, then puts in the loose tool (3) after preheating forging into, loose tool (3) and forging are smoothly placed in down
On hammer anvil, upper hammer anvil is moved downward, by the forging jumping-up outside loose tool, as Step Shaft larger diameter end length L1When size is met,
To ensure forging Step Shaft smaller diameter end and Step Shaft larger diameter end with one heart, and also to eliminate due to being produced in upsetting process
Outer circle drum, forging (2) and loose tool (3) are lain on lower hammer anvil (4) together, upper hammer anvil (1) moves downward, rolled outside
Circle, it is final to ensure Step Shaft larger diameter end diameter D and Step Shaft larger diameter end length L1Size；
3. pull out；
Forging (2) is melted down into heating, 1050 DEG C -1180 DEG C of heating temperature range, soaking time presses 0.15mm/min-1.5mm/
Min coefficients are calculated, and are taken out after insulation, are clamped Step Shaft larger diameter end and pulled out, until Step Shaft smaller diameter end size d
Requirement is reached with Step Shaft total length L, to ensure Step Shaft larger diameter end and Step Shaft smaller diameter end with one heart, spiral shell is used during pulling
The mode that rotating upset is sent into；
4. shaping；
Forging is erected on lower hammer anvil and carries out shaping, the cydariform that Step Shaft smaller diameter end during pulling is produced is put down
It is whole.
2. according to diameter difference step forged shaft loose tool manufacturing process described in claim 1, it is characterised in that：It is exposed at outside loose tool
Forging's block dimension draw ratio no more than 2.5.
3. according to diameter difference step forged shaft loose tool manufacturing process described in claim 1, it is characterised in that：Loose tool height gauge
It is very little not less than the 1/2 of diameter of forgings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629479.5A CN105642802B (en) | 2014-11-10 | 2014-11-10 | A kind of diameter difference step forged shaft loose tool manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629479.5A CN105642802B (en) | 2014-11-10 | 2014-11-10 | A kind of diameter difference step forged shaft loose tool manufacturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105642802A CN105642802A (en) | 2016-06-08 |
| CN105642802B true CN105642802B (en) | 2017-09-22 |
Family
ID=56483005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410629479.5A Expired - Fee Related CN105642802B (en) | 2014-11-10 | 2014-11-10 | A kind of diameter difference step forged shaft loose tool manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105642802B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935739A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Forging technology of motor shaft |
| CN109794570B (en) * | 2019-03-01 | 2020-10-20 | 苏州宝业锻造有限公司 | Simple die forging method for double-flange large valve body |
| CN114425590A (en) * | 2022-02-10 | 2022-05-03 | 鞍钢重型机械有限责任公司 | Forging method of short sleeve with flange |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460138C (en) * | 2004-08-19 | 2009-02-11 | 中国北车集团大同电力机车有限责任公司 | Integrated forging method of flange type step thin wall long sheath forging |
| CN101314202B (en) * | 2008-06-02 | 2010-04-21 | 江阴振宏重型锻造有限公司 | Method for producing wind-electricity principal axis by gathering stock full fibre upset forging |
| CN101456057B (en) * | 2008-12-01 | 2010-09-29 | 江阴风电法兰制造有限公司 | Large-scale wind electricity main-axis end large-flange tyre die forging tool and method |
| CN101602157A (en) * | 2009-06-24 | 2009-12-16 | 刘惠 | A kind of production technology of speed reducer output shaft |
| KR20130042823A (en) * | 2011-10-19 | 2013-04-29 | 현진소재주식회사 | A pair of top and bottom upsetting dies of a heavy metal forging process for an improvement of metal physical properties and a formation of a holding part |
-
2014
- 2014-11-10 CN CN201410629479.5A patent/CN105642802B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105642802A (en) | 2016-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105642802B (en) | A kind of diameter difference step forged shaft loose tool manufacturing process | |
| CN101912939B (en) | Extruding, upsetting and moulding die and corresponding upsetting method | |
| CN105382157A (en) | Forming method for large special-shaped structural steel multi-step ring piece | |
| CN103128102A (en) | Production method of titanium alloy oil well pipe | |
| CN103722107A (en) | Method of rolling titanium alloy rectangular ring blanks into special-shaped thin-walled rings | |
| CN104801653A (en) | Cold-upsetting processing technology with flange bolt | |
| CN103658478B (en) | The manufacture method of nuclear power evaporator transition cone forge piece | |
| CN103567341B (en) | The method for forging and molding of CAP1400 nuclear pressure container nozzle belt | |
| CN105537473A (en) | Forming method of nickel-based high-temperature alloy multi-step large special-shaped ring part | |
| CN102319854A (en) | Forging method for side end enclosures of supercritical steam-water separators | |
| CN111036697A (en) | Production method of Z-shaped special-shaped steel wire | |
| CN104607579A (en) | Rolling forming method for aluminium alloy thick wall ring forge piece | |
| CN110961560B (en) | Forging method for one-time upsetting forming of large-height-diameter-ratio bar | |
| CN105964846B (en) | A kind of manufacturing process of hollow double wedge forging | |
| CN109719249A (en) | A kind of expansion forming method of the high cylinder part of Ta1 material thin wall | |
| CN104550583A (en) | Method for rolling and forming alpha-phase titanium alloy thick-wall ring forging | |
| CN206241169U (en) | A kind of continuous cone upsetting die of super large ratio of height to diameter bar | |
| CN104607578A (en) | Roll forming method for stainless steel thick-wall ring forged piece | |
| CN105363973A (en) | Method for formation of beta-phase titanium alloy multi-step large profiled ring | |
| JP2015123478A (en) | Rolling equipment and manufacturing method of steel sheet pile | |
| CN105396993A (en) | Forming method for bearing steel multi-step large special-shaped ring | |
| CN107755607A (en) | Manufacturing process on a kind of band angle stock forging flat-die hammer | |
| CN105396994A (en) | Forming method for aluminum alloy multi-step large special-shaped ring | |
| CN107486532A (en) | The forging method of three-way piece | |
| CN204035444U (en) | The mould of large-scale interior T-shaped ring-type forge piece blank reheating forging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20201110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |