CN102189212A - Large-scale crank shaft bending forging die - Google Patents
Large-scale crank shaft bending forging die Download PDFInfo
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- CN102189212A CN102189212A CN2011100618320A CN201110061832A CN102189212A CN 102189212 A CN102189212 A CN 102189212A CN 2011100618320 A CN2011100618320 A CN 2011100618320A CN 201110061832 A CN201110061832 A CN 201110061832A CN 102189212 A CN102189212 A CN 102189212A
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Abstract
The invention discloses a large-scale crank shaft bending forging forming die. A female die consists of a horizontal foundation and a channel-steel-shaped main body consisting of two vertical side plates of which the lower end is fixed on the foundation; a reinforcing plate which is connected with the side plate is arranged outside each side plate; and two ends of the two side plates of the female die are provided with two baffle plates which are connected with two side plates. The upper edge of each baffle plate is slightly higher than the contact surface of the lower end of a bending die and the blank. The whole height of the baffle plate is larger than the maximum stroke of the bending die. Although the large-scale crank shaft bending forging forming die has a simple structure and is convenient to arrange, the large-scale crank shaft bending forging forming die can prevent the metal at the root of a crank arm from flowing to two sides of a crank throw, reduce the side broadening amount of the crank arm and the side sinking amount of the crank throw, so that the sinking amount at the root of the crank arm is radically eliminated, and the forming quality of a forging piece and the utilization rate of the material are improved to certain extent.
Description
Technical field the present invention relates to a kind of forging mold, and particularly large-scale bent axle is bent forging mould.
The background technology bent axle is one of vital part in the engine, is widely used on locomotive and the engine of boat and ship.The used forged steel crankshaft of large-scale marine low-speed high-horsepower diesel engine, except that the little cylinder diameter low-speed machine of small part with the integral shaft, all the other major parts are all semi-built-up crankshaft.Semi-built-up crankshaft is made up of free end axle journal, output axle journal, middle trunnion and crank throw, and wherein first three part blank shape is simple and size is little, and crank throw is complex-shaped, and size is big, is the key of producing bent axle.In a sense, the key technology of semi-built-up crankshaft manufacturing is exactly the forging and molding technology of crank throw blank.For the flat-die forging of single large-scale crank throw, mainly contain piece and forge method, ring rolling method, upsetting method, die forging, curved forging method etc.Wherein, the deformation process of curved forging method is that elder generation is pressed into slab with steel ingot, is shaped through rough forge then, carries out bending more successively and flattens shaping.This method is with respect to aforementioned several forming modes, and curved forging method mould is simple, and plastic force is little, and is low for equipment requirements, and it is desirable that metal streamline moves towards.Therefore, when making semi-built-up crankshaft, curved forging method is widely used.But also have certain deficiency: after crank bend forging was shaped, the general side broadening amount of cranking arm that exists was big, the crank cotter pin side and the root concavity obvious defects of cranking arm, and the existence of these defectives affects the forming quality of forging, is not easy to guarantee the dimensional requirement of forging.Because blank upper surface groove size and side fillet and die A/F, die entrance size have certain influence to the shaping of bent axle.Curved being swaged in the shape in the past is by coordinating the relation of this Several Factors, reducing forming defects mostly.Yet find that by Study of finite element simulation it is all not obvious to above-mentioned defective improvement situation to change blank shape and die size parameter.For the forming requirements that guarantees that forging is last, a lot of situations can only increase machining allowance and reduce defective, and this not only makes and has more caused the waste of material by big leap ahead of production cycle.
Summary of the invention the object of the present invention is to provide a kind of simple in structure, and is easy for installation, can reduce the curved curved forging mould of large-scale bent axle that is swaged into defective after the shape of bent axle effectively.The present invention sets up two baffle plates in existing die both sides.Existing bent axle is curved forges the channel steel shape main body that two vertical side plates that die is fixed thereon by the base and the lower end of level are formed, and is respectively equipped with coupled gusset in the biside plate outside.Be respectively equipped with two baffle plates that biside plate is linked to each other at the two ends of two side plates of above-mentioned die, the contact-making surface of best baffle plate top edge a little higher than bending die lower end and blank, the blank when avoiding BENDING PROCESS just to begin flows laterally.The whole height of baffle plate then should be greater than the range of bending die, and after promptly crooked stroke finished, the lower limb of baffle plate was still below the contact-making surface of bending die lower end and blank.Stay the gap of a little between baffle plate and the blank, to make things convenient for blanking.Above-mentioned baffle plate can be fixedlyed connected with side plate, also can flexibly connect by securing member.
When blank was carried out bending forming, because the effect of side board has hindered metal along the flowing of side direction, metal was opened the crotch place along the baffle plate inner surface to the less root of cranking arm of resistance and is flowed herein.Along with the carrying out of distortion, the root of cranking arm is opened crotch place metal and is formed accumulation.This part metal has been filled up the defective that the root of cranking arm is opened the crotch place, makes out crotch place size can guarantee the forging ' s block dimension requirement.
The present invention compared with prior art has following advantage: though the present invention is simple in structure, easy for installation, but can stop the root metal of cranking arm to crank throw two side flow, reduced the amount of recess of crank arm side broadening amount and crank cotter pin side, the amount of recess of the feasible root of cranking arm is eliminated substantially, has improved the forming quality and the stock utilization of forging to a certain extent.
Description of drawings
Fig. 1 is the schematic top plan view of die of the present invention.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 is the schematic side view of die of the present invention.
Fig. 4 is that die duty master of the present invention looks schematic diagram.
Fig. 5 a is that forging master of the present invention looks schematic diagram.
Fig. 5 b is a forging schematic side view of the present invention.
Fig. 6 a adopts the crank arm detection figure of inboard amount of recess of existing mold processing crank throw.
Fig. 6 b adopts the crank arm detection figure of inboard amount of recess of Mould Machining crank throw of the present invention.
Fig. 7 a is the detection figure that adopts existing mold processing crank throw side broadening amount.
Fig. 7 b is the detection figure that adopts Mould Machining crank throw of the present invention side broadening amount.
Fig. 8 a is the detection figure that adopts existing mold processing crank cotter pin side-facing depressions amount.
Fig. 8 b is the detection figure that adopts Mould Machining crank cotter pin side-facing depressions amount of the present invention.
The specific embodiment
Bend in the schematic diagram of forging mould at Fig. 1, Fig. 2 and large-scale bent axle shown in Figure 3, the channel steel shape main body that the two vertical side plates 2 that die is fixed thereon by base 1 and lower end by level are formed is respectively equipped with coupled gusset 3 in the biside plate outside.Be respectively equipped with two baffle plates 4 that biside plate is linked to each other at the two ends of two side plates of above-mentioned die.Above-mentioned baffle plate flexibly connects by securing member 5 and side plate.Look in the schematic diagram die duty master of the present invention shown in Figure 4, when blank 6 is carried out brake forming, blank places in the above-mentioned die upper shed, bending die 7 places on the blank, the contact-making surface of baffle plate top edge a little higher than bending die lower end and blank, the whole height of baffle plate is greater than the range of bending die, and after promptly crooked stroke finished, the lower limb of baffle plate was still below the contact-making surface of bending die lower end and blank.Stay the gap of a little between baffle plate and the blank.The forging 8 that the present invention is final is shown in Fig. 5 a and Fig. 5 b.Fig. 6 a adopts the crank arm detection figure of inboard amount of recess of existing mold processing crank throw, the crank throw inboard dark sunk area that is of cranking arm among the figure, and as can be seen from the figure amount of recess is bigger.Fig. 6 b adopts the crank arm detection figure of inboard amount of recess of Mould Machining crank throw of the present invention, and the crank throw inboard of cranking arm does not have dark sunk area substantially, and cranking arm, inboard depression is basic to be eliminated.Fig. 7 a is the detection figure that adopts existing mold processing crank throw side broadening amount, and its side broadening amount is 1016.33 millimeters.Fig. 7 b is the detection figure that adopts Mould Machining crank throw of the present invention side broadening amount, and its side broadening amount is 961.72 millimeters, significantly reduces than not baffled broadening amount.Fig. 8 a is the detection figure that adopts existing mold processing crank cotter pin side-facing depressions amount, and darker regions is the crank cotter pin recess among the figure, and as can be seen from the figure amount of recess is bigger.Fig. 8 b is the detection figure that adopts Mould Machining crank cotter pin side-facing depressions amount of the present invention, and as can be seen from the figure amount of recess obviously reduces.
Claims (4)
1. a large-scale bent axle is bent forging mould, the channel steel shape main body that the two vertical side plates that this die is fixed thereon by base and lower end by level are formed, be respectively equipped with coupled gusset in the biside plate outside, it is characterized in that: be respectively equipped with two baffle plates that biside plate is linked to each other at the two ends of two side plates of above-mentioned die.
2. large-scale bent axle according to claim 1 is bent forging mould, it is characterized in that: the contact-making surface of baffle plate top edge a little higher than bending die lower end and blank.
3. large-scale bent axle according to claim 1 and 2 is bent forging mould, and it is characterized in that: the whole height of baffle plate is greater than the range of bending die.
4. large-scale bent axle according to claim 3 is bent forging mould, it is characterized in that: above-mentioned baffle plate flexibly connects by securing member and side plate.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100618320A CN102189212A (en) | 2011-03-15 | 2011-03-15 | Large-scale crank shaft bending forging die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100618320A CN102189212A (en) | 2011-03-15 | 2011-03-15 | Large-scale crank shaft bending forging die |
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| CN102189212A true CN102189212A (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100618320A Pending CN102189212A (en) | 2011-03-15 | 2011-03-15 | Large-scale crank shaft bending forging die |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527911A (en) * | 2011-12-26 | 2012-07-04 | 武汉重工铸锻有限责任公司 | Low-speed diesel crank bend die forging forming process |
| CN102554087A (en) * | 2011-12-31 | 2012-07-11 | 武汉重工铸锻有限责任公司 | Die bending and forging finishing process of crank blank of low-speed diesel engine |
| CN103100570A (en) * | 2011-11-14 | 2013-05-15 | 上海重型机器厂有限公司 | Openable crank extrusion device and forming method of large marine crankshaft crank |
| CN103551428A (en) * | 2013-11-12 | 2014-02-05 | 天润曲轴股份有限公司 | Bending device for thermal state plate type blank |
| CN106583620A (en) * | 2016-12-21 | 2017-04-26 | 中冶京诚工程技术有限公司 | Crank bending forging tool and method of marine diesel engine |
| CN112974698A (en) * | 2021-02-07 | 2021-06-18 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Journal die forging method for aeroengine |
Citations (4)
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| KR20040059144A (en) * | 2002-12-28 | 2004-07-05 | 두산중공업 주식회사 | Method for manufacturing a crank throw by using v-formed preform |
| CN2768922Y (en) * | 2004-09-29 | 2006-04-05 | 武汉重工铸锻有限责任公司 | Equipment for producing ship large diesel engine crankshaft crank throw |
| KR20070052590A (en) * | 2005-11-17 | 2007-05-22 | 현대중공업 주식회사 | Die device of closed-die forging for crank throw pin part using insert die |
| CN101176907A (en) * | 2007-10-19 | 2008-05-14 | 中国科学院金属研究所 | Crankshaft bell crank bending forging counterdie for combined general macrotype ship as well as design method |
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2011
- 2011-03-15 CN CN2011100618320A patent/CN102189212A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040059144A (en) * | 2002-12-28 | 2004-07-05 | 두산중공업 주식회사 | Method for manufacturing a crank throw by using v-formed preform |
| CN2768922Y (en) * | 2004-09-29 | 2006-04-05 | 武汉重工铸锻有限责任公司 | Equipment for producing ship large diesel engine crankshaft crank throw |
| KR20070052590A (en) * | 2005-11-17 | 2007-05-22 | 현대중공업 주식회사 | Die device of closed-die forging for crank throw pin part using insert die |
| CN101176907A (en) * | 2007-10-19 | 2008-05-14 | 中国科学院金属研究所 | Crankshaft bell crank bending forging counterdie for combined general macrotype ship as well as design method |
Non-Patent Citations (1)
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| 朱文宝: "K98MC-C船用曲轴曲拐锻造成形工艺研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100570A (en) * | 2011-11-14 | 2013-05-15 | 上海重型机器厂有限公司 | Openable crank extrusion device and forming method of large marine crankshaft crank |
| CN102527911A (en) * | 2011-12-26 | 2012-07-04 | 武汉重工铸锻有限责任公司 | Low-speed diesel crank bend die forging forming process |
| CN102554087A (en) * | 2011-12-31 | 2012-07-11 | 武汉重工铸锻有限责任公司 | Die bending and forging finishing process of crank blank of low-speed diesel engine |
| CN102554087B (en) * | 2011-12-31 | 2014-11-12 | 武汉重工铸锻有限责任公司 | Die bending and forging finishing process of crank blank of low-speed diesel engine |
| CN103551428A (en) * | 2013-11-12 | 2014-02-05 | 天润曲轴股份有限公司 | Bending device for thermal state plate type blank |
| CN106583620A (en) * | 2016-12-21 | 2017-04-26 | 中冶京诚工程技术有限公司 | Crank bending forging tool and method of marine diesel engine |
| CN112974698A (en) * | 2021-02-07 | 2021-06-18 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Journal die forging method for aeroengine |
| CN112974698B (en) * | 2021-02-07 | 2022-11-15 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Journal die forging method for aero-engine |
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Application publication date: 20110921 |