CN201089002Y - Nested universal crankshaft and bell crank bending forging bottom-die for large-scale ship - Google Patents
Nested universal crankshaft and bell crank bending forging bottom-die for large-scale ship Download PDFInfo
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- CN201089002Y CN201089002Y CNU2007200153977U CN200720015397U CN201089002Y CN 201089002 Y CN201089002 Y CN 201089002Y CN U2007200153977 U CNU2007200153977 U CN U2007200153977U CN 200720015397 U CN200720015397 U CN 200720015397U CN 201089002 Y CN201089002 Y CN 201089002Y
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- 238000005242 forging Methods 0.000 title claims abstract description 41
- 238000005452 bending Methods 0.000 title description 5
- 238000013461 design Methods 0.000 claims abstract description 12
- 238000007598 dipping method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005094 computer simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 101000979046 Homo sapiens Lysosomal alpha-mannosidase Proteins 0.000 description 2
- 102100023231 Lysosomal alpha-mannosidase Human genes 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model belongs to the forging field, in particular relating to a nested common large marine crankthrow bend forging lower die device which is suitable to be used in the design and manufacture process of large marine crankthrows. The whole die is provided with a basic die, a nested die and wedge blocks, wherein the nested die is positioned in the basic die, the basic die and the nested die are fixed by the side wedge blocks. Large marine crankthrows made by the device are free from the defects of bell mouth, folds and cracks, waisting, thinning, etc.; meanwhile, the device has the advantages of the device has the advantages of simple structure, light weight, convenient disassembly and assembly, repeated use, and can meet bend forging requirements for large marine crankthrows in different sizes.
Description
Technical field
The utility model belongs to the forging field, specifically is exactly die device under the general crankshaft used for large boat crank throw curved forging of a kind of nested type, and it is applicable to the design and the manufacture process of crankshaft used for large boat crank bend forging counterdie.
Background technology
Bent axle is the heart of large ship, (singly turn weight is everlasting more than 5 tons crankshaft used for large boat, bearing weight is more than 50 tons) combine by crank throw, main shaft, flange shaft, several parts of power output shaft, wherein crank throw is the parts of manufacture difficulty maximum on the half built-up crank shaft, difficult point is the bend-forging process of crank throw blank, present most semi-built-up crankshaft crank throw blank adopts the manufacturing of bend-forging method, the characteristics of this method are easy and simple to handle, the product type scope is wide, and is less demanding to forging equipment.
Crank throw curved forging mould commonly used is made up of crooked patrix, crooked counterdie, plate.At first forging stock is pulled out, forge into crooked prefabricated blank, then prefabricated blank is put on the crooked counterdie of U-shaped, with patrix, prefabricated blank, counterdie centering, with patrix prefabricated blank is pressed in the counterdie, prefabricated blank is bent, form butterfly-like shape, then plate is put into two crank arm between, crank arm two gradually and press to the end of cranking arm from the crank-pin end with flat anvil to plate, finally finishing is shaped forges.
In the crank throw forging mold, the A/F of crooked counterdie is a very crucial technological parameter, and the counterdie opening is excessive, deformed region is concentrated in transition region by the end of cranking arm, and the crooked inner surface of cranking arm concaves, and can't flatten when finishing, the final horn mouth that forms causes blank allowance deficiency; The counterdie too small openings, then the forging deformation drag is excessive, and equipment is required to increase, two crank arm and counterdie between frictional force increase, cause the root of cranking arm " waisting " phenomenon obvious, the patrix approach is big simultaneously, cause internal arm root metallic fiber to cut off, influence the security that part uses.
Because the crank throw model is many, on 50～98 machine sizes, all have than big-difference, even same type also has different model, and therefore if corresponding every kind of model crank throw is all made the counterdie of respective openings width, the crooked counterdie that then needs to make 6 kinds of different sizes at least could cover the crank throw of 50～98 machine models.These moulds not only cost of manufacture are higher, and will occupy a large amount of mould placing space, brought inconvenience to production.Therefore, should design a kind of general crooked counterdie, can adjust, make its aperture pitch can adapt to the preformed blank of various models according to different model crank throw blank.
Along with the development of modern forging theory and computer modeling technique, adopt the forming process of analogue technique prediction heavy casting and forging to enter the practical stage.Develop a lot of simulation softwards (as: ABAQUS, ANSYS, MARC, DEFORM etc.) in the world and simulate the plastic deformation of metal process, and the security that can carry out mould is analyzed.According to analog result, not only can obtain the net shape and the size of forging, the type of prediction forging defect and the position of generation, and can obtain the stress situation that mould bears, determine the Mould design principle.By the repetition test on computer platform, can determine a kind of Forging Technology of the best, obtain the design size of mould and blank, the employing computer modeling technique designs technology and optimizes, can obviously shorten the cycle of trial production, save raw material, the rate of reducing the number of rejects and seconds, and then reduce production costs.
The utility model content
The purpose of this utility model is to provide die device under a kind of nested type crankshaft used for large boat crank throw curved forging, adopt this device to produce the crankshaft used for large boat crank throw, can eliminate defectives such as the frequent horn mouth that occurs of crank bend forging process, fold cracks, waisting, attenuate, simultaneously should the bending counterdie simple in structure, weight is less, dismounting, easy to assembly, reusable can be satisfied the curved forging requirement of different model crankshaft used for large boat crank throw.
The technical solution of the utility model is:
The utility model has been developed the device of nested type crankshaft used for large boat crank throw curved forging counterdie, and its main contents comprise:
1) design nested type crank bend forging counterdie
A whole set of mould is made up of basic mould, nested mould, voussoir.The connected mode of a whole set of mould is: nested mould is placed in the basic mould, adopts the voussoir of side to fix between basic mould and the nested mould, prevents relative slip.
The feature of each part of mould is as follows:
The crank throw curved counterdie of the general crankshaft used for large boat of described nested type, the basis mould is made of the working lining and the deep floor of base, both sides, the working lining of being located on the base is outward-dipping, forms the outward-dipping wedge-shaped groove structure in side, and deep floor is located at the working lining outside.Basis mould side top has wedge-shaped slot, and voussoir easy to use is connected with nested mould.
The crank throw curved counterdie of the general crankshaft used for large boat of described nested type, nested mould is the outward-dipping U-shaped structure in both sides, nested mould outer surface and basic mould inner surface configuration consistent size, nested mould side top has wedge-shaped slot, and voussoir easy to use is connected with basic mould.According to forging other crank throw of different machines, make a series of nested moulds, every kind of nested mould A/F difference, all can with the supporting use of basic mould.
The crank throw curved counterdie of the general crankshaft used for large boat of described nested type, voussoir is used to connect basic mould and nested mould, the gradient α of voussoir
Voussoir=10～15 °.
2) cooperation of designing mould each several part and using method
At first forge the rank of crank throw according to reality, determine to use suitable nested mould, then suitable nested mould is placed on the basic mould, make the wedge-shaped slot alignment of basic mould and nested mould side, then voussoir is stuck in the wedge-shaped slot place of basic mould and nested mould side, basic mould is fixed with nested mould relative position.
After crooked counterdie assembles, the crank throw prefabricated blank of heating is placed on the crooked counterdie, use crooked patrix that blank is bent, form butterfly-likely, take out blank then and carry out finishing, till being swaged to qualified process.
The beneficial effects of the utility model are:
1, the utility model has designed the device of the crank throw curved counterdie of a kind of nested type crankshaft used for large boat, the crooked counterdie that adopts this method design to obtain is produced the crankshaft used for large boat crank throw, can eliminate defectives such as the frequent horn mouth that occurs of crank bend forging process, fold cracks, waisting, attenuate.
2, the crooked counterdie of the utility model is simple in structure, and weight is less, and dismounting, easy to assembly, reusable has been avoided producing a plurality of crooked counterdies for the crank throw that forges different model designs, and therefore greatly reduces manufacturing cost.This device can satisfy the curved forging requirement of different model crankshaft used for large boat crank throw, is applicable to produce MANB﹠amp; Whole type crankshaft crank parts of W (Man Enbiwei) and WNSD (Wa Xilan) diesel engine patents company.
Description of drawings
Fig. 1 a-b is the assembled shape schematic diagram of crank throw curved counterdie; Fig. 1 a is a front view, and Fig. 1 b is a side view.
Fig. 2 a-b is the shape schematic diagram of the basic mould 1 of crank throw curved counterdie; Fig. 2 a is a front view, and Fig. 2 b is a side view.
Fig. 3 a-b is the nested mould 2 shape schematic diagrames of crank throw curved counterdie; Fig. 3 a is a front view, and Fig. 3 b is a side view.
Fig. 4 a-b is the voussoir 3 shape schematic diagrames of crank throw curved counterdie; Fig. 4 a is a front view, and Fig. 4 b is a side view.
Fig. 5 a-b is for using the computer simulation schematic diagram that the utility model carries out bend-forging, and Fig. 5 a is the relative status of crooked front mold and blank, and Fig. 5 b is the relative status of crooked back mould and blank.
Fig. 6 be in the BENDING PROCESS blank to the reaction force evolution course of patrix.
Fig. 7 be in the BENDING PROCESS blank to the patrix reaction force Stress Field Distribution of mould and blank when maximum.
Among the figure, 1-basis mould; The nested mould of 2-; The 3-voussoir; The 4-base; The 5-working lining; The 6-deep floor; 7-wedge-shaped slot I; 8-wedge-shaped slot II; The 9-patrix; The 10-blank.
The specific embodiment
Below in conjunction with drawings and Examples in detail the utility model is described in detail, except that angle, other long measures are mm in the utility model.
With reference to Fig. 1 a-b, a whole set of mould is made up of basic mould 1, nested mould 2, voussoir 3.The connected mode of a whole set of mould is: nested mould 2 is placed in the basic mould 1, adopts the voussoir 3 of side fixing between basic mould 1 and the nested mould 2, prevents relative slip.
(1) structure of basic mould:
Shown in Fig. 2 a-b, basic mould 1 is made of the working lining 5 and the deep floor 6 of base 4, both sides, and the working lining of being located on the base 45 is outward-dipping, forms the outward-dipping wedge-shaped groove structure in side, and deep floor 6 is located at working lining 5 outsides.Basis mould 1 side top has wedge-shaped slot I 7, and voussoir 3 easy to use is connected with nested mould 2.Basis mould 1 surface of internal cavity (with nested mould 2 contact portions) roughness requires Ra=12.5～25 μ m.
(2) structure of nested mould:
Shown in Fig. 3 a-b, nested mould 2 is the outward-dipping U-shaped structure in both sides, nested mould 2 outer surfaces and basic mould 1 inner surface configuration consistent size, and nested mould 2 side top have wedge-shaped slot II8, and voussoir 3 easy to use is connected with basic mould 1.According to forging other crank throw of different machines, make a series of nested moulds 2, every kind of nested mould 2 A/F differences, all can with basic mould 1 supporting use.Nested mould 2 outer surfaces (with basic mould 1 contact portion) roughness requires Ra=12.5～25 μ m.
Nested mould 2 key component design sizes following (unit, mm):
The gradient α of nested mould 2
Nested mould=9～11 °
For being applicable to the nested mould 2 that forges 50 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 50=1350～1450
Nested die wedge shape groove bottom width d
2 nested mould _ 50=700～800
For being applicable to the nested mould 2 that forges 60 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 60=1450～1550
Nested die wedge shape groove bottom width d
2 nested mould _ 60=800～850
For being applicable to the nested mould 2 that forges 70 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 70=1650～1750
Nested die wedge shape groove bottom width d
2 nested mould _ 70=950～1050
For being applicable to the nested mould 2 that forges 80 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 80=1750～1850
Nested die wedge shape groove bottom width d
2 nested mould _ 80=1150～1250
For being applicable to the nested mould 2 that forges 90 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 90=1950～2050
Nested die wedge shape groove bottom width d
2 nested mould _ 90=1350～1450
For being applicable to the nested mould 2 that forges 98 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 98=2150～2250
Nested die wedge shape groove bottom width d
1 nested mould _ 98=1650～1750
(3) structure of voussoir:
Shown in Fig. 4 a-b, voussoir 3 is used for fixing basic mould 1 and nested mould 2, prevents that both from taking place relatively to slide the gradient α of voussoir 3 in crank throw curved process
Voussoir=10～15 °.
(4) cooperation of mould each several part and using method:
At first forge the rank of crank throw according to reality, determine to use suitable nested mould 2, then suitable nested mould 2 is placed on the basic mould 1, make the wedge-shaped slot alignment of basic mould 1 and nested mould 2 sides, then voussoir 3 is stuck in the wedge-shaped slot place of basic mould 1 and nested mould 2 sides, basic mould 1 is fixed anti-sliding stop with nested mould 2 relative positions.
After crooked counterdie assembles, the crank throw prefabricated blank of heating is placed on the crooked counterdie, use crooked patrix 9 that blank 10 is bent, form butterfly-likely, take out blank then and carry out finishing, till being swaged to qualified process.
Embodiment
The forging parts of present embodiment is MANB﹠amp; The S70MC model crankshaft crank of W patents company, the blank material is S34MnV, the heavy 23t of blank, blank heating temperature is 1250 ℃, it is 35CrMo (yield strength is 650MPa) that mould is selected material for use, d
1 nested mould=700mm, d
2 nested moulds=1000mm.When crooked on the hydraulic press anvil depress speed and be about 20mm/s, the Computer simulation results before and after the forging distortion is shown in Fig. 5 a-b.Blank as seen from the figure, is about the reaction force maximum of total kilometres one half blank to patrix at the patrix stroke to the reaction force evolution course of patrix as shown in Figure 6 in the BENDING PROCESS, and the stress that this moment, the mould each several part was born is also maximum.At this constantly, a whole set of mould meets with stresses maximum position in the corner, bottom of basic mould 1, and as shown in Figure 7, the maximum equivalent of bearing is about 249MPa, and within the YIELD STRENGTH scope, mould is reasonable in design, and is safe in utilization.
Claims (8)
1. die device under the general crankshaft used for large boat crank throw curved forging of nested type, it is characterized in that: a whole set of mould is provided with basic mould (1), nested mould (2), voussoir (3), nested mould (2) is placed in the basic mould (1), adopts the voussoir (3) of side fixing between basic mould (1) and the nested mould (2).
2. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 1, it is characterized in that: basic mould (1) is provided with the working lining (5) and the deep floor (6) of base (4), both sides, the working lining of being located on the base (4) (5) is outward-dipping, form the outward-dipping wedge-shaped groove structure in side, deep floor (6) is located at working lining (5) outside, and basic mould (1) side top has the wedge-shaped slot that voussoir easy to use (3) is connected with nested mould (2).
3. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 1, it is characterized in that: nested mould (2) is the outward-dipping U-shaped structure in both sides, nested mould (2) outer surface and basic mould (1) inner surface configuration consistent size, nested mould (2) side top has the wedge-shaped slot that voussoir easy to use (3) is connected with basic mould (1).
4. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 3, it is characterized in that: the gradient α of nested mould (2)
Nested mould=9～11 °.
5. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 3, it is characterized in that: nested mould (2) is for being applicable to forging: the nested mould of 50 machine crank throws, 60 machine crank throws, 70 machine crank throws, 80 machine crank throws, 90 machine crank throws, 98 machine crank throws.
6. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 5, it is characterized in that nested mould design size is as follows:
For being applicable to the nested mould that forges 50 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 50=1350～1450
Nested die wedge shape groove bottom width d
2 nested mould _ 50=700～800
For being applicable to the nested mould that forges 60 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 60=1450～1550
Nested die wedge shape groove bottom width d
2 nested mould _ 60=800～850
For being applicable to the nested mould that forges 70 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 70=1650～1750
Nested die wedge shape groove bottom width d
2 nested mould _ 70=950～1050
For being applicable to the nested mould that forges 80 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 80=1750～1850
Nested die wedge shape groove bottom width d
2 nested mould _ 80=1150～1250
For being applicable to the nested mould that forges 90 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 90=1950～2050
Nested die wedge shape groove bottom width d
2 nested mould _ 90=1350～1450
For being applicable to the nested mould that forges 98 machine crank throws:
Nested mould wedge-shaped slot top width d
1 nested mould _ 98=2150～2250
Nested die wedge shape groove bottom width d
2 nested mould _ 98=1650～1750
Above-mentioned long measure is mm.
7. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 1, it is characterized in that: the gradient α of voussoir (3)
Voussoir=10～15 °.
8. according to die device under the general crankshaft used for large boat crank throw curved forging of the described nested type of claim 1, it is characterized in that: basic mould (1) surface of internal cavity requires Ra=12.5～25 μ m with the roughness of nested mould (2) contact portion, and the roughness of nested mould (2) outer surface and basic mould (1) contact portion requires Ra=12.5～25 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200153977U CN201089002Y (en) | 2007-10-19 | 2007-10-19 | Nested universal crankshaft and bell crank bending forging bottom-die for large-scale ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200153977U CN201089002Y (en) | 2007-10-19 | 2007-10-19 | Nested universal crankshaft and bell crank bending forging bottom-die for large-scale ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201089002Y true CN201089002Y (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200153977U Expired - Fee Related CN201089002Y (en) | 2007-10-19 | 2007-10-19 | Nested universal crankshaft and bell crank bending forging bottom-die for large-scale ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201089002Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107802380A (en) * | 2017-10-31 | 2018-03-16 | 北京爱康宜诚医疗器材有限公司 | Femoral stem sept mould |
-
2007
- 2007-10-19 CN CNU2007200153977U patent/CN201089002Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107802380A (en) * | 2017-10-31 | 2018-03-16 | 北京爱康宜诚医疗器材有限公司 | Femoral stem sept mould |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20121019 |