CN109622856A - A kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing method of adjustment - Google Patents

A kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing method of adjustment Download PDF

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Publication number
CN109622856A
CN109622856A CN201811524403.0A CN201811524403A CN109622856A CN 109622856 A CN109622856 A CN 109622856A CN 201811524403 A CN201811524403 A CN 201811524403A CN 109622856 A CN109622856 A CN 109622856A
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China
Prior art keywords
crankshaft
heading die
intermode
away
horizontal
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CN201811524403.0A
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CN109622856B (en
Inventor
林军
陈强
康凤
黄树海
胡传凯
夏祥生
赵祖德
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Southwest Institute of Technology and Engineering of China South Industries Group
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No 59 Research Institute of China Ordnance Industry
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Forging (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The invention discloses a kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing methods of adjustment, this method, which is directed to composable mold structure used by upsetting extrusion technique, will inevitably generate axial Plastic Flow, the problem for causing trunnion length overproof, according to prefabricated blank, crankshaft forging, the geometric parameter of composable mold, the horizontal space of composable mold is adjusted before forming, single trunnion axial length can be controlled within the scope of ± the 0.5mm of design value, each of crankshaft is cranked arm machining allowance deviation≤1mm, should method can effectively increase full-fibre crankshaft forging yield rate, quality conformance.

Description

A kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing method of adjustment
Technical field
The invention belongs to precision plastic forming process and apparatus fields, are specifically exactly a kind of full-fibre crankshaft forging forming Process can be used on various upsetting squeeze combined shapings (or shaping for Whole fiber) device.
Background technique
Existing diesel engine raising power per liter density by a relatively large margin reduces its main parts size size simultaneously.Crankshaft It is the most important components of engine, fatigue behaviour directly influences engine reliability of operation.The works such as traditional open die forging The crankshaft fatigue strength of skill preparation mismatches the demand of high power density engine.The crankshaft of upsetting squeeze combined shaping preparation can be compared with Its fatigue performance of big raising is the preferred forming technology of high-performance crankshaft.
Upsetting extrusion technique using by forming mode is turned, the technique is when respectively turn, it is necessary to bent to current forming by forming Turn into the positioning of row angle, it is ensured that the angle between respectively turning.Currently, the spacing of composable mold is generally pressed during upsetting extrusion It is calculated according to the design size of Step Shaft blank drawing and forging drawing.However, caused by the design value of two drawings of direct basis Problem is: one, the blank after heating is difficult to be put into mold；Second is that the single crank throw axial length after forming is seriously overproof.
In order to ensure crankshaft axial dimension meets design requirement, the spacing, each composable mold inside calculating composable mold Between spacing with regard to particularly important.
Summary of the invention
Feeding is to the clearance requirement between composable mold inside and each composable mold when for crankshaft upsetting extrusion process, A kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing method of adjustment is improved, the solution process of this method is such as Under:
In the case where not changing step axis blank and crankshaft forging original design, by adjusting composable mold horizontal space, mention The dimensional accuracy of high crankshaft forging trunnion axial direction length.
The horizontal heading die of upsetting extrusion mold and horizontal thrust intermode are away from, it is assumed that trunnion, the connecting rod of step axis blank Neck, area of cranking arm axial length be respectively PZ、PL、PQ；Crankshaft forging list turns trunnion and connecting rod neck axial length, axial direction of cranking arm With a thickness of FZ、FL、FQ；Heading die is with a thickness of TD；The length that heading die is used to fix blank is Dz；Crankshaft shares N number of crank throw；Respectively Turn from left to right that successively forming etc. determines the mold before each crank throw forming in the horizontal direction according to following method under known conditions Spacing:
Before (1) the 1st crank throw forming, the horizontal heading die and mistake of the left and right sides turn intermode and are disposed as PZ+PQ-FQ+5mm away from L1 ~25mm；Forming and thrust intermode in the horizontal heading die in right side are PL+0.5 × (PZ DZ) away from L2.
When (2) the 2 ~ N-1 crank throw forming, the horizontal heading die of the left and right sides and intermediate mistake turn intermode and are set as away from equal L1 PQ-FQ+5mm~25mm；The horizontal heading die in right side and thrust intermode are PQ+1mm ~ 5mm away from L2；The horizontal heading die in left side and thrust Intermode is FQ+2mm ~ 10mm, and L0+DZ=FZ+FQ-1mm ~ 2mm away from L0.
(3) when n-th crank throw shapes, the horizontal heading die of the left and right sides and intermediate mistake turn intermode away from being disposed as PQ FQ+ 5mm~25mm；The horizontal heading die in left side and thrust intermode are PQ+2mm ~ 5mm away from L0, and L0+DZ=FZ+FQ 1mm ~ 2mm, L2 in It is equal sized with Blank Design.
The present invention is not in the case where changing step axis blank and crankshaft forging original design, by adjusting composable mold water Flat spacing improves the dimensional accuracy of crankshaft forging trunnion axial direction length.
Detailed description of the invention
Fig. 1 is crankshaft forging critical size；
Fig. 2 is the enlarged drawing of Fig. 1 left part；
Fig. 3 turns Combined Forming Die position and parameter definition for the 1st；
Fig. 4 is the enlarged drawing of Fig. 3 left part；
Fig. 5 turns to N-1 the composable mold relative position for turning forming for the 2nd；
Fig. 6 is the enlarged drawing in the middle part of Fig. 5；
Fig. 7 is the composable mold relative position that N turns forming；
Fig. 8 is the enlarged drawing in the middle part of Fig. 7.
In figure, 3-1 is that mistake turns mould, and 3-2 is right horizontal thrust mould, and 3-3 is right horizontal heading die, and 3-4 is left horizontal jumping-up Mould, 3-5 are left horizontal thrust mould.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments.
Embodiment 1
Certain 6 turns crankshaft, trunnion length Fz=30mm, thickness F of cranking arm Q=28mm, the connecting rod neck length FL=60mm of single crank throw； Step Shaft prefabricated blank trunnion length Pz=32mm, crank arm thickness PQ=58mm, connecting rod neck length PL=62mm；The T of heading dieD= 20mm,Dz=28mm.Mold spacing in the horizontal direction before so each crank throw forming:
1st when turning forming:
L1=PZ+PQ-FQ+ 5mm ~ 25mm=32mm+58mm-28mm+5 ~ 25mm=62mm+5 ~ 25mm, it is contemplated that Crankshaft Sizes are smaller, L1Value is 70mm.
L2=PL+0.5×(PZ−DZ)=62mm+0.5×(32mm−28)=64mm
2nd ~ 5 when turning forming:
L1=PQ-FQ+ 5mm ~ 25mm=58mm-28mm+5mm ~ 25mm=30mm+5mm ~ 25mm, it is contemplated that Crankshaft Sizes are smaller, L1It takes Value is 38mm.
L2=PQ+ 1mm ~ 5mm=58mm+1mm ~ 5mm, takes 60mm
L0=FQ+ 2mm ~ 10mm=28mm+2mm ~ 10mm, because of L0+ 28=30+28-1mm ~ 2mm, takes 29mm.
6th when turning forming:
L1=PQ-FQ+ 5mm ~ 25mm=58mm-28mm+5mm ~ 25mm=30mm+5mm ~ 25mm, it is contemplated that Crankshaft Sizes are smaller, L1It takes Value is 38mm.
L0=FQ+ 2mm ~ 10mm=28mm+2mm ~ 10mm, because of L0+ 28=30+28-1mm ~ 2mm, takes 29mm.
L2Depending on material head length,
Embodiment 2
Certain 18 turns crankshaft, trunnion length Fz=50mm of single crank throw, thickness F of cranking armQ=72mm, connecting rod neck length FL=96mm； Step Shaft prefabricated blank trunnion length Pz=60mm, crank arm thickness PQ=124mm, connecting rod neck length PL=98mm；The T of heading dieD= 112mm,Dz=48mm.Mold spacing in the horizontal direction before so each crank throw forming:
1st when turning forming:
L1=PZ+PQ-FQ+ 5mm ~ 25mm=60mm+124mm-72mm+5 ~ 25mm=112mm+5 ~ 25mm, it is contemplated that Crankshaft Sizes compared with Greatly, L1Value is 130mm.
L2=PL+0.5×(PZ−DZ)=98mm+0.5×(60mm−48)=104mm
2nd ~ 17 when turning forming:
L1=PQ-FQ+ 5mm ~ 25mm=124mm-72mm+5mm ~ 25mm=52mm+5mm ~ 25mm, it is contemplated that Crankshaft Sizes are larger, L1 Value is 70mm.
L2=PQ+ 1mm ~ 5mm=124+1mm ~ 5mm, takes 130mm
L0=FQ+ 2mm ~ 10mm=72mm+2mm ~ 10mm, because of L0+ 48=50+72+1mm ~ 2mm, takes 73mm.
18th when turning forming
L1=PQ-FQ+ 5mm ~ 25mm=124mm-72mm+5mm ~ 25mm=52mm+5mm ~ 25mm, it is contemplated that Crankshaft Sizes are larger, L1 Value is 70mm.
L0=FQ+ 2mm ~ 10mm=72mm+2mm ~ 10mm, because of L0+ 48=50+72+1mm ~ 2mm, takes 73mm.
This method, which is directed to composable mold structure used by upsetting extrusion technique, will inevitably generate axial plasticity stream The problem moved, cause trunnion length overproof, according to prefabricated blank, crankshaft forging, composable mold geometric parameter, adjust before forming The horizontal space of whole composable mold can control single trunnion axial length within the scope of the ± 0.5mm of design value, bent Each of axis is cranked arm machining allowance deviation≤1mm, it should which this method can effectively increase full-fibre crankshaft forging yield rate, matter Measure consistency.

Claims (1)

1. a kind of full-fibre crankshaft upsetting extrusion process composable mold axial spacing method of adjustment, which is characterized in that do not change platform Rank axis blank and crankshaft forging original design, it is assumed that the trunnion of step axis blank, connecting rod neck, area of cranking arm axial length difference For PZ、PL、PQ；Crankshaft forging list turns trunnion and connecting rod neck axial length, cranks arm axially with a thickness of FZ、FL、FQ；Heading die thickness For TD；The length that heading die is used to fix blank is Dz；Crankshaft shares N number of crank throw；Respectively turn from left to right successively forming etc. known to Under the conditions of, the mold spacing in the horizontal direction before each crank throw forming is determined according to following method:
Before (1) the 1st crank throw forming, the horizontal heading die and mistake of the left and right sides turn intermode away from L1It is disposed as PZ+PQ-FQ+5mm~ 25mm；The horizontal heading die in right side and thrust intermode are away from L2For PL+0.5×(PZ−DZ)；
When (2) the 2 ~ N-1 crank throw forming, the horizontal heading die of the left and right sides and intermediate mistake turn intermode away from equal L1It is set as PQ-FQ +5mm~25mm；The horizontal heading die in right side and thrust intermode are away from L2For PQ+1mm~5mm；The horizontal heading die in left side and thrust intermode away from L0For FQ+2mm ~ 10mm, and L0+DZ=FZ+FQ-1mm ~ 2mm；
(3) when n-th crank throw shapes, the horizontal heading die of the left and right sides and intermediate mistake turn intermode away from being disposed as PQ−FQ+5mm~ 25mm；The horizontal heading die in left side and thrust intermode are away from L0For TD+ 2mm ~ 5mm, and L0+DZ=FZ+FQ1mm ~ 2mm, L2In with blank Design size is equal.
CN201811524403.0A 2018-12-13 2018-12-13 Axial distance adjusting method for combined die in full-fiber crankshaft upsetting-extruding forming process Active CN109622856B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117644174A (en) * 2024-01-26 2024-03-05 山东宝鼎重工实业有限公司 Device of adjustable size production crank forging

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094086A (en) * 1998-09-16 2000-04-04 Sumitomo Metal Ind Ltd Method for deburring crankshaft forged product
CN2502936Y (en) * 2001-09-26 2002-07-31 刘长福 Hot upset extrusion forming mould for multi-corner crankshaft
JP2005009595A (en) * 2003-06-19 2005-01-13 Toyota Motor Corp Crank shaft and its manufacturing method
CN1949232A (en) * 2006-11-01 2007-04-18 中国科学院金属研究所 Crankshaft crank throw curved forging mould for large ship and designing method of preformed blank
CN103128209A (en) * 2011-11-28 2013-06-05 上海重型机器厂有限公司 Half die forging method and half die forging device of crank throw for large ship
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
CN108057838A (en) * 2017-12-19 2018-05-22 中国兵器工业第五九研究所 A kind of Whole fiber mulit-turning crankshaft forging design method
CN108067580A (en) * 2016-11-11 2018-05-25 辽宁五八内燃机配件有限公司 A kind of air compressor crank upsetting method and mold
CN108097865A (en) * 2017-12-19 2018-06-01 中国兵器工业第五九研究所 A kind of Step Shaft prefabricated blank design method for being exclusively used in upsetting squeeze combined shaping
WO2018100810A1 (en) * 2016-11-29 2018-06-07 新日鐵住金株式会社 Production method for forged crankshaft

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094086A (en) * 1998-09-16 2000-04-04 Sumitomo Metal Ind Ltd Method for deburring crankshaft forged product
CN2502936Y (en) * 2001-09-26 2002-07-31 刘长福 Hot upset extrusion forming mould for multi-corner crankshaft
JP2005009595A (en) * 2003-06-19 2005-01-13 Toyota Motor Corp Crank shaft and its manufacturing method
CN1949232A (en) * 2006-11-01 2007-04-18 中国科学院金属研究所 Crankshaft crank throw curved forging mould for large ship and designing method of preformed blank
CN103128209A (en) * 2011-11-28 2013-06-05 上海重型机器厂有限公司 Half die forging method and half die forging device of crank throw for large ship
CN108067580A (en) * 2016-11-11 2018-05-25 辽宁五八内燃机配件有限公司 A kind of air compressor crank upsetting method and mold
WO2018100810A1 (en) * 2016-11-29 2018-06-07 新日鐵住金株式会社 Production method for forged crankshaft
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
CN108057838A (en) * 2017-12-19 2018-05-22 中国兵器工业第五九研究所 A kind of Whole fiber mulit-turning crankshaft forging design method
CN108097865A (en) * 2017-12-19 2018-06-01 中国兵器工业第五九研究所 A kind of Step Shaft prefabricated blank design method for being exclusively used in upsetting squeeze combined shaping

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117644174A (en) * 2024-01-26 2024-03-05 山东宝鼎重工实业有限公司 Device of adjustable size production crank forging
CN117644174B (en) * 2024-01-26 2024-03-29 山东宝鼎重工实业有限公司 Device of adjustable size production crank forging

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Effective date of registration: 20240313

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