CN103128209B - The semi-stamping method of argosy crank throw and device - Google Patents
The semi-stamping method of argosy crank throw and device Download PDFInfo
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- CN103128209B CN103128209B CN201110385712.6A CN201110385712A CN103128209B CN 103128209 B CN103128209 B CN 103128209B CN 201110385712 A CN201110385712 A CN 201110385712A CN 103128209 B CN103128209 B CN 103128209B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005242 forging Methods 0.000 claims abstract description 127
- 238000007493 shaping process Methods 0.000 claims abstract description 74
- 238000013461 design Methods 0.000 claims abstract description 17
- 238000005094 computer simulation Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 3
- 210000001364 upper extremity Anatomy 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of semi-stamping method and device of argosy crank throw, comprising: steel ingot is removed head and afterbody, forge into the slab of Intermediate Gray boss; Utilize the boss of two symmetrical side pressure card circle mould side pressure simultaneously preform, the circular portion in card-made pins portion; Curved forging patrix and crank cotter pin portion shaping mould is utilized to carry out embedding pressure to the blank after side pressure; Curved forging; In utilization, flat anvil and lower flat anvil carry out the curved forging of secondary and finishing.The present invention utilizes side pressure card circle mould to replace existing V-type mould, and increases crank cotter pin portion shaping mould, make the crank cotter pin portion shape after semi-stamping close to a circle, and the inclined-plane of both sides is simultaneously shaping, shortens the following process time; Adopt the parameter of computer modeling technique to blank shape size and mould to be optimized design, decrease test number (TN) and fund input, the forging process surplus after optimization obviously reduces, and has saved raw materials for production and cost, has improve production efficiency.
Description
Technical field
The invention belongs to forging field, specifically belong to a kind of semi-stamping method and device of argosy crank throw, this device and technique are obtained by computer modeling technique, are applicable to the manufacture of argosy crank throw forging.
Background technology
Crank throw (also claim crank arm, bent axle or crank) is the vitals of big-and-middle-sized boat diesel engine, is mainly used in the bent axle in big-and-middle-sized boats and ships (more than ten thousand tons) diesel engine and generating low speed two stroke diesel engine.Forging and casting can be divided into by production method, monoblock type and combined type (combination, half combination) can be divided into by structure, wherein monoblock type crank throw is smelted and is forged the restriction of ability, be confined to small crank, and Large Crankshaft must adopt combination production, and the difficult point of combined type crank throw forging is the forging of crank throw.
The main method manufacturing crank throw forging at present is in the world curved forging method, processing technology flattens base---with V-type anvil side pressure blank two sides---flexural deformation---recontour, the great advantage of this technique is easily shaping, metallic fiber flows to, required rating of set is relatively little, so most countries all adopts the method to produce crank throw in the world.
But due to the restriction of mould, more than crank-pin position, block is comparatively large, not only adds raw-material smelting cost, also consumes machining period unnecessary in a large number, elongated the production cycle, be unfavorable for the mass production of bent axle.The pressure V-type method of cranking arm traditional is mainly piled up in order to avoid local material and is formed folding, does not have the effect obviously reducing surplus finish forge.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of semi-stamping method and device of argosy crank throw, improve raw-material utilization rate, reduce forging surplus, shorten unnecessary machining period, ensure that the blank deformation in curved forging is even, improve forging type quality and qualification rate.
For solving the problems of the technologies described above, the semi-stamping device of argosy crank throw of the present invention, comprise curved forging patrix, curved forging counterdie, upper flat anvil, lower flat anvil, plate, and two of blocking stock side symmetrical side pressure card circle moulds and a crank cotter pin portion shaping mould, described side pressure card circle mould has an arc-shaped concave, the angle of described arc-shaped concave is less than or equal to 180 °, described side pressure card circle mould comprises backform and the snap gauge of integrative-structure, described backform is identical with the length of snap gauge, and snap gauge is positioned at the centre position of backform, described arc-shaped concave is positioned at the centre of snap gauge, backform comprises one section of inclined plane from top to bottom near the one side of arc-shaped concave, in described crank cotter pin portion shaping mould, there is a cavity, described cavity is divided into two symmetrical die cavities by an arc platform.
Further, the die cavity side of described crank cotter pin portion shaping mould is arcuate structure.
Further, the working face that described curved forging patrix, plate contact with blank is arcuate structure, and the inside cavity of curved forging counterdie is wedge structure.
The present invention also provides a kind of semi-stamping method utilizing argosy crank throw semi-stamping device, comprises the following steps:
1st step, removes head and afterbody by steel ingot, forge into the slab of Intermediate Gray boss;
2nd step, utilize the boss of two symmetrical side pressure card circle mould side pressure simultaneously preform, blocking goes out circle and the both sides chamfered portion in pin portion;
3rd step, utilizes curved forging patrix and crank cotter pin portion shaping mould to carry out embedding pressure to the blank after side pressure;
4th step, curved forging;
5th step, in utilization, flat anvil and lower flat anvil carry out the curved forging of secondary and finishing.
Wherein, in the 2nd step, the side pressure card circle mould be positioned at above preform is fixed on flat anvil, and the side pressure card circle mould be positioned at below preform is fixed on lower flat anvil.
In the 3rd step, first crank cotter pin portion shaping mould is placed on lower flat anvil, then the projection section of the blank after side pressure is put into crank cotter pin portion shaping mould, with the downward pressed compact material of flat anvil, make blank be embedded in crank cotter pin portion shaping mould; Again curved forging patrix is arranged on above press, makes curved forging patrix descending and contact blank, motionless to preformed body central stationary, finally by steel wire rope or iron chains, blank, crank cotter pin portion shaping mould and curved forging patrix are connected as a single entity.
In the 4th step, start press, first the blank linked together, crank cotter pin portion shaping mould and curved forging patrix are placed on curved forging counterdie, blank is made to be shelved on curved forging counterdie, crank cotter pin portion shaping mould is arranged in the inside cavity of curved forging counterdie, and the center to preformed body and mould, then press is made at the uniform velocity to depress with the speed of 100 ~ 150mm/s, until crank cotter pin portion shaping mould contacts with the inside cavity of curved forging counterdie and keeps motionless, finally blank, crank cotter pin portion shaping mould are separated with curved forging patrix, blank melts down to be waited to expect.
Further, preform in 1st step is obtained by computer simulation according to the processing drawing of crank throw part, side pressure card circle mould in 2nd step is obtained by computer simulation, comprise backform and the snap gauge of integrative-structure, described backform is identical with the length of snap gauge, and snap gauge is positioned at the centre position of backform, described snap gauge has an arc-shaped concave, the angle of described arc-shaped concave is less than or equal to 180 °, described arc-shaped concave is positioned at the centre of snap gauge, the inclined plane from top to bottom that backform comprises one section of plane near the one side of arc-shaped concave and is connected with plane.
Beneficial effect of the present invention is:
1, utilize side pressure card circle mould to replace existing V-type mould, and increase crank cotter pin portion shaping mould, make the crank cotter pin portion shape after semi-stamping close to a circle, and the inclined-plane of both sides forms out, and substantially reduces the following process time simultaneously;
2, the parameter of computer modeling technique to blank shape size and mould is adopted to be optimized design according to different parts, both test number (TN) was saved, additionally reduce fund input, also save valuable search time, and the forging process surplus after optimizing obviously reduces, and has saved raw materials for production, has reduced production cost, shorten machining period, improve production efficiency;
3, the preform of the present invention's design and the geomery of each mould and processing technology are applicable to produce S50MC, MC-C of MAN B & W (Man Enbiwei)-crank throw forging peculiar to vessel such as S90MC, MC-C, can also for the production of whole type crankshaft cranks of WNSD (Wa Xilan) company, during the crank throw part of production different model, the size of blank and mould only need be changed according to the processing drawing of part, greatly reduce design time, shorten the production cycle.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further detailed explanation:
Fig. 1 a is the front view of crank throw roughing part;
Fig. 1 b is the side view of crank throw roughing part;
Fig. 2 a is the front view of crank throw preform;
Fig. 2 b is the side view of crank throw preform;
Fig. 3 a is the front view of side pressure card circle mould;
Fig. 3 b is the side view of side pressure card circle mould;
Fig. 4 a is the front view of curved forging patrix;
Fig. 4 b is the side view of curved forging patrix;
Fig. 5 a is the front view of curved forging counterdie;
Fig. 5 b is the side view of curved forging counterdie;
Fig. 6 a is the front view of crank cotter pin portion shaping mould;
Fig. 6 b is the top view of crank cotter pin portion shaping mould;
Fig. 6 c is the left view of crank cotter pin portion shaping mould;
Fig. 7 a is side view preform being carried out to side pressure card circle;
Fig. 7 b is front view preform being carried out to side pressure card circle;
Fig. 8 be to side pressure card circle after blank carry out the schematic diagram of embedding pressure;
Fig. 9 is schematic diagram blank being carried out to curved forging;
Figure 10 be to curved forging after blank carry out the schematic diagram of the curved forging of secondary;
Figure 11 is the schematic diagram after the curved forging of secondary;
Figure 12 a is the allowance schematic diagram of conventional method;
Figure 12 b is allowance schematic diagram of the present invention.
Wherein description of reference numerals is as follows:
1 is blank; 2 is side pressure card circle mould; 3 is upper flat anvil; 4 is the blank after side pressure; 5 is lower flat anvil; 6 is crank cotter pin portion shaping mould; 7 is curved forging counterdie; 8 is iron chains; 9 is curved forging patrix; 10 is plate; 11 is cushion block.
Detailed description of the invention
The semi-stamping device of argosy crank throw provided by the invention, comprises curved forging patrix 9, curved forging counterdie 7, upper flat anvil 3, lower flat anvil 5, plate 10, side pressure card circle mould 2, crank cotter pin portion shaping mould 6 that two of blocking stock side are symmetrical.
As shown in Figure 3 a, 3 b, side pressure card circle mould 2 comprises backform and the snap gauge of integrative-structure, described backform is identical with the length of snap gauge, and snap gauge is positioned at the centre position of backform, side pressure card circle mould 2 has an arc-shaped concave, described arc-shaped concave is positioned at the centre of snap gauge, and its angle is less than or equal to 180 °, and backform comprises one section of inclined plane from top to bottom near the one side of arc-shaped concave.
As shown in Fig. 6 a to 6c, have a cavity in crank cotter pin portion shaping mould 6, described cavity is divided into two symmetrical die cavities by an arc platform.The die cavity side of crank cotter pin portion shaping mould 6 is arcuate structure.
The working face that described curved forging patrix 9, plate 10 contact with blank 1 is arcuate structure, and the inside cavity of curved forging counterdie 7 is wedge structure.
Utilize above-mentioned semi-stamping device to manufacture the semi-stamping method of argosy crank throw, comprise the following steps:
1st step, removes head and afterbody by steel ingot, forge into the slab of Intermediate Gray boss, as shown in Fig. 2 a, Fig. 2 b;
2nd step, utilize the boss of two symmetrical side pressure card circle mould 2 side pressure simultaneously preform 1, blocking goes out circle and the both sides chamfered portion in pin portion, as shown in Fig. 7 a, 7b; The side pressure card circle mould 2 be positioned at above preform is fixed on flat anvil 3, and the side pressure card circle mould 2 be positioned at below preform is fixed on lower flat anvil 5;
3rd step, utilizes the blank 4 after curved forging patrix 9 and the 6 pairs of side pressures of crank cotter pin portion shaping mould to carry out embedding pressure; Wherein, first crank cotter pin portion shaping mould 6 is placed on lower flat anvil 5, then the projection section of the blank 4 after side pressure is put into crank cotter pin portion shaping mould 6, with flat anvil 5 pressed compact material 4 downwards, make blank 4 be embedded in crank cotter pin portion shaping mould 6, as shown in Figure 8; Again curved forging patrix 9 is arranged on above press, makes curved forging patrix 9 descending and contact blank 4, motionless to preformed body central stationary, finally by steel wire rope or iron chains 8, blank 4, crank cotter pin portion shaping mould 6 and curved forging patrix 9 are connected as a single entity;
4th step, carry out curved forging, as shown in Figure 9, first the blank 4 linked together, crank cotter pin portion shaping mould 6 and curved forging patrix 9 are placed on curved forging counterdie 7, blank 4 is made to be shelved on curved forging counterdie 7, crank cotter pin portion shaping mould 6 is arranged in the inside cavity of curved forging counterdie 7, and the center to preformed body and mould, then press is made at the uniform velocity to depress with the speed of 100 ~ 150mm/s, until crank cotter pin portion shaping mould 6 contacts with the inside cavity of curved forging counterdie 7 and keeps motionless, finally blank 4, crank cotter pin portion shaping mould 6 are separated with curved forging patrix 9, blank melts down to be waited to expect;
5th step, in utilization, flat anvil 3, plate 10 and lower flat anvil 5 carry out the curved forging of secondary and finishing, as shown in Figure 10, Figure 11.
In the 1st step, preform is obtained by computer simulation according to the processing drawing of crank throw part, and each spot size unit of this preform is mm, and design formula is:
W1 base=W1+ (100 ~ 150)
W2 base=W2+ (100 ~ 150)
β base=β
α base=α
H is thick=(H1-H2)/2+ (50 ~ 90)
H1 base=H1+ (80 ~ 130)
L2 base ≈ L2+ (100 ~ 150
L3 base ≈ L3
L4 base=L1-L2+ (30 ~ 50)
L5 base=H2+2L4
base+ (40 ~ 60)
L6 base=400 ~ 550
L7 base=100 ~ 150
As shown in Fig. 1 a, 1b, the processing dimension code name implication of crank throw part is as follows:
W1 represents the width of crank throw, W2 represents the width of crank throw end, α represents the angle that up/down is surperficial and crank arm between end inclined-plane of cranking arm, β represents crank arm outer surface and the angle of cranking arm between end inclined-plane, H1 represents the height of crank cotter pin end, and H2 represents the distance between two-arm outer surface, and L1 represents the total length of crank throw, L2 represents the length of pin portion along forging length direction, and L3 represents the height on end inclined-plane of cranking arm.
As shown in Fig. 2 a, 2b, the preform size code implication of crank throw is as follows:
W1 base represents the overall width of preform or forging, α base represents the angle between inclined-plane, preform boss side and vertical plane, W2 base represents the width of crank throw forging end, β base represents crank arm outer surface and the angle of cranking arm between end inclined-plane of forging, the thickness of cranking arm of the thick expression preform of H, H1 base represents the width of preform boss upper limb, L2 base represents the gross thickness of preform, L3 base represents the boss height of preform, L4 base represents the length sum of forging stock slope and uiform section arm, L5 base represents the total length of preform, L6 base represents forging stock slope length, L7 base represents preform boss and the height being connected taper pin of cranking arm.
Side pressure card circle mould 2 in 2nd step is obtained by computer simulation, and each spot size unit is mm, and design formula is:
M1＝H3-(30～40)
M2＝W3+(50～75)
M11＝(0.47～0.50)×W1
Angle A=180 °-β
R2=(Φ
zero+ (100 ~ 150))/2
As shown in Fig. 3 a, 3b, H3 represents the internal arm size of crank throw part, and W3 represents that the circular arc center of circle is to the vertical range of working face, and W1 represents the width of crank throw part, and β represents crank arm outer surface and the angle of cranking arm between end inclined-plane, Φ
zerorepresent the diameter of crank cotter pin cylinder, M1 represents the width of snap gauge in side pressure card circle mould, M2 represents the vertical range of the side pressure card circle mould orthodrome center of circle to inclined working, M11 represents the maximum height of card sword, A represents the angle between the inclined plane of backform in side pressure card circle mould and horizontal plane, R2 represents the radius of the arc-shaped concave of snap gauge in side pressure card circle mould, and other radius of corner gets 10mm.Arc-shaped concave can be semicircle, also can be one section of minor arc, the need of closed when depending under the mold pressing of a pair side pressure card circle, and the size in reserved accommodation clout space.
Curved forging patrix 9 in 3rd step, curved forging counterdie 7 and crank cotter pin portion shaping mould 6 are obtained by computer simulation, and each spot size unit is mm,
The design formula of curved forging patrix is:
M3＝M1
M4＝(1～2)×M3＝(1～2)×M1
Angle of inclination B=20 ~ 30 °
Angle r=120 ° ~ 130 °
R1＝R2
The design formula of curved forging counterdie is:
M13＝H2+(100～120)
M14 >=W1 base+150
M15 >=2 × L3 base × tan α base+H1 base+2 × L6 base+100
M16 ≈ (M15-(2 × H thick/cos30 °)) × cos30 °+L2 base+(M17-M12) angle E=arctan (0.5 × M15/M16-0.5 × M13/M16)
M18＝400～500
R5＝350～500
R6＝200～250
The design formula of crank cotter pin portion shaping mould is:
M5＝M1
M6＝20～30
M7=W2 base
M8=H1 base
M12＝0.5×(W1－W2)/tanβ
F＝E
M9＝M13－(10～20)
M10=(W1 base+W2 base)/2+ (120 ~ 200)
M17＝M12+(100～150)
R3=Φ
zero/ 2+ (100 ~ 150)
R4＝R6
Angle G=β
Angle D=α
C＝r-90°
As shown in Fig. 4 a to 6c, M1 represents the width of snap gauge in side pressure card circle mould, M3 represents the thickness of curved forging patrix both wings, M4 represents the difference in height of the deep-slotted chip breaker inner and outer of curved forging patrix, R1 represents the radius of curved forging patrix work circular arc, B represents the angle of curved forging patrix both wings and intermediate incline, r represents the obtuse angle angle of circular arc tangential line and horizontal sides, M5 represents the thickness of arc platform in crank cotter pin portion shaping mould, M6 represents the difference in height of arc platform minimum point and die cavity bottom surface in crank cotter pin portion shaping mould, M7 represents in crank cotter pin portion shaping mould by cavity width that arc platform is split, M8 represents in crank cotter pin portion shaping mould by cavity length that arc platform is split, M9 represents the total length of shaping mould bottom surface, crank cotter pin portion, M10 represents the overall width of shaping mould bottom surface, crank cotter pin portion, M12 represents the depth capacity of the cavity split by arc platform in crank cotter pin portion shaping mould, M17 represents the total height of crank cotter pin portion shaping mould, F represents the gradient of crank cotter pin portion shaping mould a pair external surface, R3 represents the radius of arc platform in crank cotter pin portion shaping mould, R4 represents the bottom surface seamed edge fillet of crank cotter pin portion shaping mould, G represents the inclination angle of the work die face that the forging hypotenuse corresponding with angle β base is fitted, D represents the inclination angle of the working face that the forging hypotenuse corresponding with angle α base is fitted, M13 represents the width of die cavity internal orifice before curved forging counterdie rounding, M14 represents the width of curved forging counterdie base, M15 represents the width of die cavity collar extension before curved forging counterdie rounding, M16 represents the degree of depth of curved forging counterdie, E represents the angle of inclination of the die cavity inner surface of curved forging counterdie, M18 represents the total length of curved forging counterdie base, R5 represents the radius of the die cavity outer rim fillet of curved forging counterdie, R6 represents the radius of the die cavity inner edge fillet of curved forging counterdie.
The present invention utilizes side pressure card circle mould to replace existing V-type mould, and increase crank cotter pin portion shaping mould, make the crank cotter pin portion shape after semi-stamping close to a circle, and the inclined-plane of both sides forms out simultaneously, as shown in Figure 12 a, Figure 12 b, allowance of the present invention obviously reduces, and substantially reduces the following process time.
The present invention adopts the parameter of computer modeling technique to blank shape size and mould to be optimized design according to different parts, both test number (TN) was saved, additionally reduce fund input, also save valuable search time, and the forging process surplus after optimizing obviously reduces, and has saved raw materials for production, has reduced production cost, shorten machining period, improve production efficiency.
The preform of the present invention's design and the geomery of each mould and processing technology are applicable to produce S50MC, MC-C of MAN B & W (Man Enbiwei)-crank throw forging peculiar to vessel such as S90MC, MC-C, can also for the production of whole type crankshaft cranks of WNSD (Wa Xilan) company, during the crank throw part of production different model, the size of blank and mould only need be changed according to the processing drawing of part, greatly reduce design time, shorten the production cycle.
Above by specific embodiment to invention has been detailed description, but these are not construed as limiting the invention.Without departing from the principles of the present invention, the equivalent replacement that those skilled in the art does and improvement, these also should be considered as protection scope of the present invention.
Claims (9)
1. the semi-stamping device of an argosy crank throw, comprise curved forging patrix, curved forging counterdie, upper flat anvil, lower flat anvil, plate, it is characterized in that: also comprise the side pressure card circle mould that two of blocking stock side are symmetrical, a crank cotter pin portion shaping mould, described side pressure card circle mould has an arc-shaped concave, the angle of described arc-shaped concave is less than or equal to 180 °, described side pressure card circle mould comprises backform and the snap gauge of integrative-structure, described backform is identical with the length of snap gauge, and snap gauge is positioned at the centre position of backform, described arc-shaped concave is positioned at the centre of snap gauge, backform comprises one section of inclined plane from top to bottom near the one side of arc-shaped concave, in described crank cotter pin portion shaping mould, there is a cavity, described cavity is divided into two symmetrical die cavities by an arc platform.
2. the semi-stamping device of argosy crank throw according to claim 1, is characterized in that: the die cavity side of described crank cotter pin portion shaping mould is arcuate structure.
3. the semi-stamping device of argosy crank throw according to claim 1, is characterized in that: the working face that described curved forging patrix, plate contact with blank is arcuate structure, and the inside cavity of curved forging counterdie is wedge structure.
4. utilize a semi-stamping method for the semi-stamping device of argosy crank throw described in claim 1, it is characterized in that, comprise the following steps:
1st step, removes head and afterbody by steel ingot, forge into the slab of Intermediate Gray boss;
2nd step, utilize the boss of two symmetrical side pressure card circle mould side pressure simultaneously preform, blocking goes out circle and the both sides chamfered portion in pin portion;
3rd step, utilizes curved forging patrix and crank cotter pin portion shaping mould to carry out embedding pressure to the blank after side pressure;
4th step, curved forging;
5th step, in utilization, flat anvil and lower flat anvil carry out the curved forging of secondary and finishing.
5. semi-stamping method according to claim 4, is characterized in that, in described 2nd step, the side pressure card circle mould be positioned at above preform is fixed on flat anvil, and the side pressure card circle mould be positioned at below preform is fixed on lower flat anvil.
6. semi-stamping method according to claim 4, it is characterized in that, in described 3rd step, first crank cotter pin portion shaping mould is placed on lower flat anvil, then the projection section of the blank after side pressure is put into crank cotter pin portion shaping mould, with the downward pressed compact material of flat anvil, blank is made to be embedded in crank cotter pin portion shaping mould; Again curved forging patrix is arranged on above press, makes curved forging patrix descending and contact blank, motionless to preformed body central stationary, finally by steel wire rope or iron chains, blank, crank cotter pin portion shaping mould and curved forging patrix are connected as a single entity.
7. semi-stamping method according to claim 6, it is characterized in that, in described 4th step, start press, the blank first will linked together, crank cotter pin portion shaping mould and curved forging patrix are placed on curved forging counterdie, blank is made to be shelved on curved forging counterdie, crank cotter pin portion shaping mould is arranged in the inside cavity of curved forging counterdie, and the center to preformed body and mould, then press is made at the uniform velocity to depress with the speed of 100 ~ 150mm/s, until crank cotter pin portion shaping mould contacts with the inside cavity of curved forging counterdie and keeps motionless, finally by blank, crank cotter pin portion shaping mould is separated with curved forging patrix, blank melts down to be waited to expect.
8. semi-stamping method according to claim 4, is characterized in that, the preform in described 1st step is obtained by computer simulation according to the processing drawing of crank throw part, and each spot size unit of this preform is mm, and design formula is:
W1 base=W1+ (100 ~ 150)
W2 base=W2+ (100 ~ 150)
α base=α
β base=β
H is thick=(H1-H2)/2+ (50 ~ 90)
H1 base=H1+ (80 ~ 130)
L2 base ≈ L2+ (100 ~ 150
L3 base ≈ L3
L4 base=L1-L2+ (30 ~ 50)
L5 base=H2+2L4 base+(40 ~ 60)
L6 base=400 ~ 550
L7 base=100 ~ 150
Wherein, the processing dimension code name implication of crank throw part is as follows:
W1 represents the width of crank throw, W2 represents the width of crank throw end, α represents the angle that up/down is surperficial and crank arm between end inclined-plane of cranking arm, β represents crank arm outer surface and the angle of cranking arm between end inclined-plane, H1 represents the height of crank cotter pin end, and H2 represents the distance between two-arm outer surface, and L1 represents the total length of crank throw, L2 represents the length of pin portion along forging length direction, and L3 represents the height on end inclined-plane of cranking arm;
The preform size code implication of crank throw is as follows:
W1 base represents the overall width of preform or forging, α base represents the angle between inclined-plane, preform boss side and vertical plane, W2 base represents the width of crank throw forging end, β base represents crank arm outer surface and the angle of cranking arm between end inclined-plane of forging, the thickness of cranking arm of the thick expression preform of H, H1 base represents the width of preform boss upper limb, L2 base represents the gross thickness of preform, L3 base represents the boss height of preform, L4 base represents the length sum of forging stock slope and uiform section arm, L5 base represents the total length of preform, L6 base represents forging stock slope length, L7 base represents preform boss and the height being connected taper pin of cranking arm.
9. semi-stamping method according to claim 8, is characterized in that,
Side pressure card circle mould in described 2nd step is obtained by computer simulation, comprise backform and the snap gauge of integrative-structure, described backform is identical with the length of snap gauge, and snap gauge is positioned at the centre position of backform, described snap gauge has an arc-shaped concave, the angle of described arc-shaped concave is less than or equal to 180 °, described arc-shaped concave is positioned at the centre of snap gauge, the inclined plane from top to bottom that backform comprises one section of plane near the one side of arc-shaped concave and is connected with plane, each spot size unit of described side pressure card circle mould is mm, and design formula is:
M1＝H3-(30～40)
M2＝W3+(50～75)
M11＝(0.47～0.50)×W1
A＝180°－β
R2=(Φ
zero+ (100 ~ 150))/2
Wherein, H3 represents the internal arm size of crank throw part, and W3 represents that the circular arc center of circle is to the vertical range of working face, and W1 represents the width of crank throw part, and β represents crank arm outer surface and the angle of cranking arm between end inclined-plane, Φ
zerorepresent the diameter of crank cotter pin cylinder, M1 represents the width of snap gauge in side pressure card circle mould, M2 represents the vertical range of the side pressure card circle mould orthodrome center of circle to inclined working, M11 represents the maximum height of card sword, A represents the angle between the inclined plane of backform in side pressure card circle mould and horizontal plane, R2 represents the radius of the arc-shaped concave of snap gauge in side pressure card circle mould, and other radius of corner gets 10mm;
Curved forging patrix in described 3rd step, curved forging counterdie and crank cotter pin portion shaping mould are obtained by computer simulation, described curved forging patrix and blank contact site are arcuate structure, in described crank cotter pin portion shaping mould, there is a cavity, described cavity is divided into two symmetrical die cavities by an arc platform, each spot size unit of described curved forging patrix, curved forging counterdie and crank cotter pin portion shaping mould is mm
The design formula of curved forging patrix is:
M3＝M1
M4＝(1～2)×M3＝(1～2)×M1
Angle of inclination B=20 ~ 30 °
Angle r=120 ° ~ 130 °
R1＝R2
The design formula of curved forging counterdie is:
M13＝H2+(100～120)
M14 >=W1 base+150
M15 >=2 × L3 base × tan α base+H1 base+2 × L6 base+100
M16 ≈ (M15-(2 × H thick/cos30 °)) × cos30 °+L2 base+(M17-M12)
M17＝M12+(100～150)
Angle E=arctan (0.5 × M15/M16-0.5 × M13/M16)
M18＝400～500
R5＝350～500
R6＝200～250
The design formula of crank cotter pin portion shaping mould is:
M5＝M1
M6＝20～30
M7=W2 base
M8=H1 base
M12＝0.5×(W1－W2)/tanβ
F＝E
M9＝M13－(10～20)
M10=(W1 base+W2 base)/2+ (120 ~ 200)
R3=Φ
zero/ 2+ (100 ~ 150)
R4＝R6
Angle G=β
Angle D=α
C＝r-90°
Wherein, M1 represents the width of snap gauge in side pressure card circle mould, M3 represents the thickness of curved forging patrix both wings, M4 represents the difference in height of the deep-slotted chip breaker inner and outer of curved forging patrix, R1 represents the radius of curved forging patrix work circular arc, B represents the angle of curved forging patrix both wings and intermediate incline, r represents the obtuse angle angle of circular arc tangential line and horizontal sides, M5 represents the thickness of arc platform in crank cotter pin portion shaping mould, M6 represents the difference in height of arc platform minimum point and die cavity bottom surface in crank cotter pin portion shaping mould, M7 represents in crank cotter pin portion shaping mould by cavity width that arc platform is split, M8 represents in crank cotter pin portion shaping mould by cavity length that arc platform is split, M9 represents the total length of shaping mould bottom surface, crank cotter pin portion, M10 represents the overall width of shaping mould bottom surface, crank cotter pin portion, M12 represents in crank cotter pin portion shaping mould by cavity depth capacity that arc platform is split, M17 represents the total height of crank cotter pin portion shaping mould, F represents the gradient of crank cotter pin portion shaping mould a pair external surface, R3 represents the radius of arc platform in crank cotter pin portion shaping mould, R4 represents the bottom surface seamed edge fillet of crank cotter pin portion shaping mould, G represents the inclination angle of the work die face that the forging hypotenuse corresponding with angle β base is fitted, D represents the inclination angle of the working face that the forging hypotenuse corresponding with angle α base is fitted, M13 represents the width of die cavity internal orifice before curved forging counterdie spill working face bottom width rounding, M14 represents the width of curved forging counterdie base, M15 represents the width of die cavity collar extension before curved forging counterdie rounding, M16 represents the degree of depth of curved forging counterdie, E represents the angle of inclination of curved forging counterdie die cavity inner surface, M18 represents the total length of curved forging counterdie base, R5 represents the radius of curved forging counterdie die cavity outer rim fillet, R6 represents the radius of curved forging counterdie die cavity inner edge fillet.
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| CN201110385712.6A CN103128209B (en) | 2011-11-28 | 2011-11-28 | The semi-stamping method of argosy crank throw and device |
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| CN201110385712.6A CN103128209B (en) | 2011-11-28 | 2011-11-28 | The semi-stamping method of argosy crank throw and device |
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| CN103128209B true CN103128209B (en) | 2015-10-28 |
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Cited By (1)
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|---|---|---|---|---|
| WO2021251552A1 (en) * | 2020-06-10 | 2021-12-16 | 주식회사 에이치엠 | Cotter pin to which separation-prevention means is coupled, and manufacturing method therefor |
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| JP2017122500A (en) * | 2016-01-08 | 2017-07-13 | 株式会社神戸製鋼所 | Large-sized crank shaft |
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| KR20240089283A (en) * | 2022-01-20 | 2024-06-20 | 쫑쥐신 오션 엔지니어링 이킵먼트 컴퍼니 리미티드 | Two-step heat forming forging process for large crank slowdowns |
| CN114346144B (en) * | 2022-01-20 | 2024-01-26 | 中聚信海洋工程装备有限公司 | Two-shot forming forging process for large crank |
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| CN200963665Y (en) * | 2006-11-01 | 2007-10-24 | 中国科学院金属研究所 | Crankshaft and bell crank bending forging die for large-scale ship |
| CN201154385Y (en) * | 2007-12-28 | 2008-11-26 | 中国科学院金属研究所 | Large-scale marine crankshaft crank bend forging finishing device |
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| JPS60223634A (en) * | 1984-04-21 | 1985-11-08 | Japan Steel Works Ltd:The | Die forging method of crank arm with half journal |
| JPS6289544A (en) * | 1985-10-14 | 1987-04-24 | Kobe Steel Ltd | Method and device for partial die forging of crank throw |
| KR100528085B1 (en) * | 2002-12-28 | 2005-11-15 | 두산중공업 주식회사 | Method for manufacturing a crank throw by using v-formed preform |
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| CN200963665Y (en) * | 2006-11-01 | 2007-10-24 | 中国科学院金属研究所 | Crankshaft and bell crank bending forging die for large-scale ship |
| CN201154385Y (en) * | 2007-12-28 | 2008-11-26 | 中国科学院金属研究所 | Large-scale marine crankshaft crank bend forging finishing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021251552A1 (en) * | 2020-06-10 | 2021-12-16 | 주식회사 에이치엠 | Cotter pin to which separation-prevention means is coupled, and manufacturing method therefor |
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Effective date of registration: 20161209 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy Machines Plant Co., Ltd. |