CN102699262A - Material converging method for G2500 crankshaft in pre-forging die - Google Patents
Material converging method for G2500 crankshaft in pre-forging die Download PDFInfo
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- CN102699262A CN102699262A CN2012101869797A CN201210186979A CN102699262A CN 102699262 A CN102699262 A CN 102699262A CN 2012101869797 A CN2012101869797 A CN 2012101869797A CN 201210186979 A CN201210186979 A CN 201210186979A CN 102699262 A CN102699262 A CN 102699262A
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention provides a material converging method for a G2500 crankshaft in a pre-forging die. According to characteristics of various parts of a crank of a G2500 crankshaft forging, because the crank is wide, a die opposite to the wide crank is deep and is difficult to fill in the die forging process, and in order to completely fill the die in the finish forging process, the joint of a cavity of the pre-forging die and a cavity of a flash saddle is thickened in the pre-forging process, and the crank away from the periphery is radially shrunk, so that by the material converging method for the pre-forging die, the materials are converged to a die splitting surface along the periphery of the crank in the pre-forging process, and the crank is full in the finish forging process.
Description
Technical field
The present invention provides a kind of G2500 bent axle in the blocking mould, to gather the material method; Promptly according to the characteristic of each position crank of G2500 crankshaft forging, because the crank broad, the crank corresponding position mould of broad is darker; In die forging process, be difficult to be full of; Intact in order to guarantee that the finish-forging process is full of, the place's of link thickening of blocking die cavity and overlap bridge portion die cavity in the blocking process, to around be radial and dwindle; Make material the die joint place gather crank around, be convenient to make in the finish-forging process each position of bent axle can both be full of method.
Background technology
Since the nineties, the automobile industry development of China is rapid.The advanced FMT of auto industry has driven the development of national die forging industry, and along with the increase year by year of auto output, the output of automobile forging also rises year by year.In the automobile forging, bent axle and front axle are maximum, also are most important forging, need set up the production of specialized die forging production line.
In the auto manufacturing, Production of Crankshaft is adopted two types of blanks in modern times, a kind of is the foundry goods of casting with spheroidal graphite cast-iron; Another kind is the steel forgings that forges with hot forging.Spheroidal graphite cast-iron because of its mechanical strength near or surpass medium carbon steel and cost is low, wearability is good, use wider in China.But casting crankshaft and crankshaft forging compare, and to same support width, the wearing and tearing of casting crankshaft supporting surface are very fast, and the noise of generation is higher, and the axial region seal failure is also very fast.And the forging bent axle can reduce the noise and the vibration of engine, improves the economy of fuel oil.In recent years; Automobile production just develops with the direction method that increases compression volume towards the average pressure that increases engine power, raising engine cylinder, reduction friction power loss, oversize piston stroke; Therefore, the ratio of casting crankshaft descends day by day, and the ratio of crankshaft forging day by day rises.Along with engine generally adopts supercharging technology, the output torque of bent axle strengthens, and crankshaft forging replaces casting crankshaft to become clear day by day.
The bent axle Forging Technology generally is blanking at present, and------roller forging sheet stamping---cut edge by blocking---finish-forging---in heating.The technology that generally adopts at present directly with the round bar heating, is carried out blocking and finish-forging on forcing press, and the crank broad of bent axle, all there is the problem that is not fully filled in present technology.In order to address this problem, the present invention innovates on blocker, material is accumulated in around each crank, to guarantee that bent axle is full of.Show in the practice that this technological full level is good.
Summary of the invention
The G2500 bent axle gathers the material method in the blocking mould; The Forging Technology of G2500 bent axle is divided into roller forging sheet stamping, three stations of blocking and finish-forging, and wherein blocking comprises upper die and lower die; The overlap of blocking patrix and blocking counterdie comprises bridge portion and chamber portion two parts; And the part that bridge portion links to each other with forging is gradient, and in the angle of inclination beta of the overlap bridge portion that is parallel to crankshaft center line crank place, its size is no more than 30 °; In the inclination angle theta perpendicular to the overlap bridge portion at crankshaft center line crank throw place, its size is no more than 30 °; Circumferentially be no more than 30 ° along 8 cranks to the inclination angle of overlap bridge portion; Overlap bridge portion inclination angle length d 1 perpendicular to crankshaft crank axis place is 107mm.
Description of drawings
Fig. 1 is the front view of G2500 bent axle blocking mould matched moulds state;
Fig. 2 is the preparatory forging drawing of G2500 bent axle;
Fig. 3 is a K1-K1 profile in the G2500 bent axle blocking spare die drawing 1;
Fig. 4 is a K-K profile among G2500 bent axle blocking spare Fig. 2;
Fig. 5 is a C-C profile among G2500 bent axle blocking spare Fig. 2;
The specific embodiment
Fig. 1 is the front view of G2500 bent axle blocking mould matched moulds state; Label 1 is the blocker patrix, and label 3 and 8 is shaft shoulders of bent axle, and label 4,5,6,7 is four crank throws of bent axle blocking spare; Like Fig. 1, shown in Figure 2; 00-00 is the die joint of G2500 bent axle blocking spare, also is the axis of bent axle, and the meaning of identical label representative is identical in the present embodiment.Fig. 2 is the preparatory forging drawing of G2500 bent axle, and the axle at crank throw 4,5,6,7 places is axle B, and B1, B2, B3, B4 are respectively the labels of the axle of crank throw 4,7,6,5 place's different parts, and label A1, A2, A3, A4, A5, A6, A7, A8 are respectively 8 cranks of bent axle.Fig. 3 is a K1-K1 profile in the G2500 bent axle blocking spare die drawing 1; Label d is the height of overlap bridge portion; Label β is the inclination angle that is parallel to the overlap bridge portion at crankshaft center line, crank place, and β 1, β 2, β 3 are the inclination angle that different cranks place is parallel to crankshaft center line, and its angle is no more than 30 °.Fig. 4 is a K-K profile in the preparatory forging drawing of G2500 bent axle, and the location drawing of this forging is the location drawing that is placed on the die drawing among Fig. 1.Fig. 5 is a C-C profile among G2500 bent axle blocking spare Fig. 2; D1 is that the center line of axle B at crank throw place is to the distance of the intersection of θ and the overlap bridge d of portion; Be the inclination angle length D=107mm of overlap bridge portion, θ is that its size is no more than 30 ° perpendicular to the inclination angle of the overlap bridge portion at crankshaft center line crank throw place; The angle of overlap bridge portion is circumferentially arrived on the edge of 8 crank A1, A2, A3, A4, A5, A6, A7, A8, and its size is no more than 30 °.
The above is merely preferred embodiment of the present invention, and all changes of being made with claim of the present invention all should belong to covering scope of the present invention.
Claims (5)
1.G2500 bent axle gathers the material method in the blocking mould; The Forging Technology of G2500 bent axle is divided into roller forging sheet stamping; Three stations of blocking and finish-forging, wherein blocking comprises upper die and lower die, the overlap of blocking patrix and blocking counterdie comprises bridge portion and chamber portion two parts; And the part that bridge portion links to each other with forging is gradient, it is characterized in that.
2. G2500 bent axle as claimed in claim 1 gathers the material method in the blocking mould, in the angle of inclination beta of the overlap bridge portion that is parallel to crankshaft center line crank place, its size is no more than 30 °.
3. G2500 bent axle as claimed in claim 1 gathers the material method in the blocking mould, in the inclination angle theta perpendicular to the overlap bridge portion at crankshaft center line crank throw place, its size is no more than 30 °.
4. G2500 bent axle as claimed in claim 1 gathers the material method in the blocking mould, circumferentially be no more than 30 ° to the inclination angle of overlap bridge portion along 8 cranks.
5. G2500 bent axle as claimed in claim 1 gathers the material method in the blocking mould, be 107mm in the overlap bridge portion inclination angle length d 1 perpendicular to crankshaft crank axis place.
Priority Applications (1)
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CN2012101869797A CN102699262A (en) | 2012-06-07 | 2012-06-07 | Material converging method for G2500 crankshaft in pre-forging die |
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CN2012101869797A CN102699262A (en) | 2012-06-07 | 2012-06-07 | Material converging method for G2500 crankshaft in pre-forging die |
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CN2012101869797A Pending CN102699262A (en) | 2012-06-07 | 2012-06-07 | Material converging method for G2500 crankshaft in pre-forging die |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105312469A (en) * | 2014-07-30 | 2016-02-10 | 桂林福达重工锻造有限公司 | Spherical pre-forging die for small heads of crankshafts |
CN105436383A (en) * | 2016-01-11 | 2016-03-30 | 无锡透平叶片有限公司 | Die structure for preventing die forging turbine blade profile from being filled with materials insufficiently |
CN107096865A (en) * | 2016-02-19 | 2017-08-29 | 通用汽车环球科技运作有限责任公司 | Crankshaft group with core plug and the method for manufacturing crankshaft group |
CN112496246A (en) * | 2020-10-09 | 2021-03-16 | 南昌航空大学 | Method for solving die forging stuffiness of automobile crankshaft forge piece |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11320014A (en) * | 1998-05-20 | 1999-11-24 | Sumitomo Metal Ind Ltd | Deburring work method of crank shaft forging and its cutter die |
JP2004322137A (en) * | 2003-04-23 | 2004-11-18 | Nissan Motor Co Ltd | Method and die for forging crankshaft |
CN101020224A (en) * | 2007-03-14 | 2007-08-22 | 重庆大学 | Crankshaft forging die |
CN201913125U (en) * | 2010-11-30 | 2011-08-03 | 重庆大学 | Blank producing module by means of rolling and extruding before finish forging of plane parting crankshaft |
CN201997654U (en) * | 2011-01-11 | 2011-10-05 | 重庆大江杰信锻造有限公司 | Die cavity structure on balance plate of crankshaft forged piece pre-molding die |
-
2012
- 2012-06-07 CN CN2012101869797A patent/CN102699262A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11320014A (en) * | 1998-05-20 | 1999-11-24 | Sumitomo Metal Ind Ltd | Deburring work method of crank shaft forging and its cutter die |
JP2004322137A (en) * | 2003-04-23 | 2004-11-18 | Nissan Motor Co Ltd | Method and die for forging crankshaft |
CN101020224A (en) * | 2007-03-14 | 2007-08-22 | 重庆大学 | Crankshaft forging die |
CN201913125U (en) * | 2010-11-30 | 2011-08-03 | 重庆大学 | Blank producing module by means of rolling and extruding before finish forging of plane parting crankshaft |
CN201997654U (en) * | 2011-01-11 | 2011-10-05 | 重庆大江杰信锻造有限公司 | Die cavity structure on balance plate of crankshaft forged piece pre-molding die |
Non-Patent Citations (1)
Title |
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辛宗仁等: "《锻造技术经济分析》", 30 September 1992, 机械工业出版社 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105312469A (en) * | 2014-07-30 | 2016-02-10 | 桂林福达重工锻造有限公司 | Spherical pre-forging die for small heads of crankshafts |
CN105436383A (en) * | 2016-01-11 | 2016-03-30 | 无锡透平叶片有限公司 | Die structure for preventing die forging turbine blade profile from being filled with materials insufficiently |
CN107096865A (en) * | 2016-02-19 | 2017-08-29 | 通用汽车环球科技运作有限责任公司 | Crankshaft group with core plug and the method for manufacturing crankshaft group |
CN112496246A (en) * | 2020-10-09 | 2021-03-16 | 南昌航空大学 | Method for solving die forging stuffiness of automobile crankshaft forge piece |
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Application publication date: 20121003 |