CN206276860U - marine diesel engine crank bending forging tool - Google Patents
marine diesel engine crank bending forging tool Download PDFInfo
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- CN206276860U CN206276860U CN201621404943.1U CN201621404943U CN206276860U CN 206276860 U CN206276860 U CN 206276860U CN 201621404943 U CN201621404943 U CN 201621404943U CN 206276860 U CN206276860 U CN 206276860U
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- mold
- forging
- lower mould
- marine diesel
- crank
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- 238000005242 forging Methods 0.000 title claims abstract description 120
- 238000005452 bending Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 abstract description 28
- 230000007547 defect Effects 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 12
- 230000007935 neutral effect Effects 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000005266 casting Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a crooked forging instrument of marine diesel engine crank. The marine diesel crank bending forging tool comprises: a lower die supporting the forging, the lower die having a V-shaped opening forming a forming cavity in which the forging is forged; the upper die is abutted against the forge piece, the first side face of the upper die is a V-shaped anvil and is opposite to the first side face of the lower die, the third side face of the upper die is opposite to the second side face of the lower die, and the bottom face of the upper die is in the shape of an arc which is sunken upwards in the vertical direction. The utility model provides a crank at the hot work technology defect that the crooked technology in-process of forging and pressing formed, improve material utilization rate.
Description
Technical field
The utility model is related to a kind of marine diesel crank bending forging tools.
Background technology
Wherein argosy crank is the critical component in marine engine, and it is to the steady of diesel engine, safe operation tool
There is most important effect.Curved forging method is to use most production technologies at present.The bending stage is played to pass to product final mass
Important effect.As depicted in figs. 1 and 2, ingot casting is forged into preformation by the mode that current crank forging technology first passes through open die forging
Base 5 ' in the middle of type, then using bend-forging, middle base 5 ' is placed on lower mould 3 ', middle base 5 ' is forged with mold 1 ',
V-shaped forging 52 ' is bent to, finally using technique is flattened, forging 52 ' finished product is forged to.Current crank forging technology is also deposited
In many problems, it is most prominent precisely due to forging defect and the stock utilization that causes is low.
In sum, there is problems with the prior art：In marine diesel crank bending forging process, due to forging
Defect and the stock utilization that causes is low.
Utility model content
The utility model provides a kind of marine diesel crank bending forging tools, to solve the bending of marine diesel crank
In forging process, the low problem of the stock utilization that is caused due to forging defect.
Therefore, the utility model proposes a kind of marine diesel crank bending forging tools, it is described for forging to be molded
Marine diesel crank bending forging tools includes：
Supporting the lower mould of the forging, the lower mould has：Lower mould bottom surface, lower mould first side and lower mould
Second side, the lower mould first side and lower mould second side are both connected on the lower mould bottom surface；Under described
V-arrangement opening is formed between mould first side and lower mould second side, the V-arrangement opening forms the shaping of the forging forging
Chamber；
The mold on the forging is pushed against, the mold is V-type anvil, and the V-type anvil includes：Mold bottom surface,
And the circumferential mold first side being connected on the mold bottom surface, mold second side, mold the successively
Three sides and the side of mold the 4th, the mold first side and the side of mold the 3rd form v-angle；The upper mould
Tool second side and the side of mold the 4th are parallel to each other；The mold first side and mold second side are intersected directly
Angle；
Wherein, the mold first side is facing with lower mould first side, and the side of the mold the 3rd is with
Mould second side is facing, and the mold bottom surface is the circular arc that in the vertical direction is recessed upwards.
Further, angle of the v-angle of the V-type anvil more than the V-arrangement opening.
Further, the v-angle of the V-type anvil is 25 to 28 degree.
Further, the angle of the V-arrangement opening is 14 to 16 degree.
Further, the mold also has and is connected to mold first side, mold second side, mold the
The mold top surface at the top of three sides and the side of mold the 4th, the mold top surface is plane.
Further, the mold top surface is rectangle plane.
The utility model devise with upwards depression circular arc bottom surface V-type anvil, and devise again it is preforming in
Between base shape, the preforming middle base includes：Cylinder, the round platform positioned at the cylinder two ends and positioned at the round platform two
The flat board at end；The circular arc bottom surface can be engaged with the cylinder of preforming middle base, and round platform can be with the V-arrangement of lower mould
Opening is engaged, therefore, the cooperation of mould of the present utility model and preforming middle base eliminates traditional moulds and is contacted with forging stock
These are mainly plastically deformed the irregular deformation of position formation, and deformation defect for position and peripheral region, can eliminate indent, super
The forging defects such as wide, accumulation, improve stock utilization, reduce the production cost of product.
Brief description of the drawings
Fig. 1 is the principle schematic that existing marine diesel crank bends forging method, wherein, not yet carry out bending forging
Make；
Fig. 2 is the principle schematic that existing marine diesel crank bends forging method, wherein, complete bending forging
Make；
Fig. 3 is the solid of the preforming middle base that marine diesel crank bending forging method of the present utility model is used
Figure；
Fig. 4 is the main view of the preforming middle base that marine diesel crank bending forging method of the present utility model is used
Figure；
Fig. 5 is the vertical view of the preforming middle base that marine diesel crank bending forging method of the present utility model is used
Figure；
Fig. 6 is the principle schematic that marine diesel crank of the present utility model bends forging method, wherein, not yet carry out
Bend-forging；
Fig. 7 is the principle schematic that marine diesel crank of the present utility model bends forging method, wherein, complete curved
Song forging；
Fig. 8 is the structural representation of mold of the present utility model；
Fig. 9 is the schematic diagram of the product defects of existing marine diesel crank bending forging method, wherein being main view side
To；
Figure 10 is the schematic diagram of the product defects of existing marine diesel crank bending forging method, wherein being side-looking side
To.Drawing reference numeral explanation：
The forging of base 52 ' 54 ' is cranked arm the region 543 ' of the region of root 541 ' 542 ' in the middle of mould 5 ' under 1 ' mold 3 '
The region of region 544 '
Forging after the bend-forging of 1 mould of mold 3 times, 5 forging 58
The mold of 10 mold bottom surface, 11 first side, 12 mold second side, 13 the 3rd side of mold 14
The mold top surface of four side 15
30 times 33 times mould second sides of mould first side of mould bottom surface 31 times
The tangent plane (inclined-plane) of the round platform of 50 cylinder, 51 round platform, 53 round platform, 55 flat board, 57 flat board 510
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, now control is illustrated
The utility model.
Applicant has found in research process：In existing marine diesel crank bending forging process, such as Fig. 1 and Fig. 2
Shown, in bending deformation process, due to the continuity of material, stress shows the phenomenon along length direction diffusion of cranking arm.Forging
Neutral surface length stays constant inside base, does not influence by bending, causes in thickness direction near forging stock neutral line position stress
Minimum, forging stock surface stress is maximum (wherein, for example in root 54 ' of cranking arm, i.e. mold 1 ' and the zone of action of forging 52 ').
Using the tradition curved method of forging, mould is mainly to be plastically deformed position with forging stock contact site and peripheral region.Such as Fig. 9 and
Shown in Figure 10, crank inner side (such as at the place of region 541 ') compression chord, outside (such as at the place of region 542 ') tension stress.Outward
At side material is then formed (such as at the place of region 542 ') (such as at the place of region 541 ') at inner side because metal contracts form pit
Pile up；Larger irregular deformation is produced at region 543 ' and 544 ' two, ultra-wide and indent is formed.These defects can cause machine
Processing capacity increases, and lumber recovery is low, increases following process difficulty, or even produce waste product.Applicant further analyzes the class of defect
Type and reason, mainly have：
(1) pile up：In BENDING PROCESS, because the stress on the inside of V-arrangement is directed to root, root neutral surface inside material of cranking arm
Certain material stacking can be formed.Piling up will increase follow-up machining workload.
(2) pit：On the outside of root neutral surface of cranking arm, forging bends through journey by action of pulling stress, material outside under tension
Effect shrink, it is extended along the direction of center of deformation line, and due to there is no enough metals to be mended at forging stock edge
Fill, the constancy of volume, incompressibility based on material, metal occurs along the contraction perpendicular to direction of cranking arm at this, and then form the recessed of part
Hole, the appearance of pit also causes that forging's block dimension reduces at this, causes stock utilization to decline, or even cause following process surplus
Deficiency, causes waste product.
(3) ultra-wide：Root of being cranked arm during forging and stamping is plastically deformed, and neutral surface inner metal is caused by forging stock bending
The extruding of compression and mold, flows to the less both sides of resistance on width, and forms ultra-wide, ultra-wide but can increase
Amount of machining, reduces stock utilization.
(4) indent：While ultra-wide, acted on perpendicular to compression of cranking arm by mold pressure, in V-arrangement region of cranking arm
Edge, surface metal flows in outward direction, due to metal continuity, while driving interior metal also to flow laterally, causes
The material cranked arm on the inside of neutral surface is lost in, and forms indent.The thickness of root of making to crank arm reduces, and machining can be caused when indent is serious
Surplus is not enough, or even scraps forging.
In the stage of pressing, the defect such as ultra-wide, indent can also be further exacerbated by.
Therefore, the utility model proposes a kind of marine diesel crank bending forging tools, for forging to be molded, this reality
Theory of plastic deformation with the new forging to carrying out bend-forging according to metal at knee and Deformation Flow, enters to forging
Go and improve again, be made that the forging 5 (preforming middle base) of suitable bend-forging.
As shown in Fig. 3, Fig. 4 and Fig. 5, forging of the present utility model 5 (preforming middle base) includes：Cylinder 50, positioned at institute
The round platform 51 and round platform 53 that cut out inclined-plane and the flat board 55 and flat board 57 positioned at the round platform two ends at cylinder two ends are stated, is put down
The length direction of plate is parallel with the axis of cylinder and round platform；The upper surface of flat board is concordant with the side of round platform, above round platform
Side for example cuts a part or cuts out a platform, and the side below round platform is the tangent plane of facing directly with gradient, i.e. round platform
(inclined-plane) 510, for and the first side or lower mould second side of lower mould mutually extrude, contact, the side below round platform
Gradient of the gradient for example with the first side of lower mould or lower mould second side it is consistent.Two round platforms can be on cylinder pair
Claim, two flat boards can be able to be bilateral symmetry on Cylindrical symmetry, forging 5 (preforming middle base).Platform is tabular
Cuboid, more than the diameter of cylinder 50, round platform plays a part of transition connecting platform and cylinder for the width of platform, cylinder and
Round platform in follow-up bend-forging, can make up the flowing of plastic deformation, reduce stress concentration and various defects.
So, during forging 5 (preforming middle base) can overcome tradition to forge, root 54 ' of cranking arm as in Figure 1 and Figure 2
Stress is larger or concentrates, and neutral surface inner side in root forms the problem of material stacking, can overcome the neutral surface outside of root 54 ' of cranking arm
Because of pit phenomenon caused by mobility；The compression that root neutral surface inner metal of cranking arm can be overcome to be caused by forging stock bending
And the extruding of mold forms the phenomenon of ultra-wide；Mold pressure can be overcome perpendicular to the effect of compression of cranking arm, in the V that cranks arm
The edge in shape region, the material on the inside of neutral surface of cranking arm is lost in, and forms the problem of indent.
Forging 5 (preforming middle base) be by mold ingot casting heated, it is upset, pulling and rounding, by ingot casting
It is forged into the forging of cylindrical shape；Then the two ends to cylindrical shape forging carry out pressing forging, the two ends of forging is formed flat
Plate, makes the middle part of forging be forged into the shape of cylinder plus round platform.
As shown in Figure 6 and Figure 7, marine diesel crank bending forging tools of the present utility model includes：
Supporting the lower mould 3 of the forging, the lower mould 3 has：Lower mould bottom surface 30, the lower and of mould first side 31
Lower mould second side 33, the lower mould first side 31 and lower mould second side 33 are both connected to the lower mould bottom surface
On 30；V-arrangement opening is formed between the lower mould first side 31 and lower mould second side 33, the V-arrangement opening is formed
Forge the forming cavity of the forging；
The mold 1 on the forging (preforming middle base) 5 is pushed against, the mold is V-type anvil, as shown in figure 8,
The V-type anvil includes：Mold bottom surface 10 and the successively circumferential side of mold first being connected on the mold bottom surface
Face 11, mold second side 12, the side 13 of mold the 3rd, the side 14 of mold the 4th, and it is commonly connected to this four
The mold top surface 15 of side top, mold top surface 15 is plane, for bearing to beat, the mold first side and upper
The side of mould the 3rd forms v-angle；The mold second side and the side of mold the 4th are parallel to each other；The mold
First side and mold second side meet at right angle；The horizontal cross-section of mold is rectangle；
Wherein, the mold first side 11 is facing with lower mould first side 31, is interacted；On described
The side 13 of mould the 3rd and lower mould second side 33 are facing, are interacted；The mold bottom surface 10 is vertical
The circular arc being recessed upwards on direction, is engaged with the cylinder 50 with forging (preforming middle base) 5, mold 1 is wrapped
The top of cylinder 50 is surrounded, the stress concentration or other deformation defects of root appearance of being cranked arm in reduction forging process.
The utility model carries out structure improvement by forging (preforming middle base) 5, is allowed to be more suitable for bend-forging, subtracts
Crank arm less root appearance stress concentration or other deformation defects, make forging that there is more preferable formability.Also, devise therewith
The mold with depression bottom surface upwards for matching, therefore, the formability of workpiece will be substantially improved, and can eliminate indent, ultra-wide, heap
The forging defects such as product, improve stock utilization, reduce the production cost of product.
Further, the v-angle of the V-type anvil of mold is more than the angle of the V-arrangement opening of lower mould, so that forging plasticity
Deformation.
Further, the v-angle of the V-type anvil is 25 to 28 degree, i.e. mold first side 11 and mold the 3rd
The angle of side 13 is 25 to 28 degree, so that forging has suitable flexibility.
Further, the angle of the V-arrangement opening of lower mould 3 is 14 to 16 degree, for example, 15 degree, makes crank in forming process
In, crooking one's arm to bend.
The utility model also proposes a kind of described marine diesel crank bending forging method, described marine diesel
Crank bending forging method is comprised the following steps：
Step A：To mold ingot casting heated, it is upset, pulling and rounding, ingot casting is forged into the forging of cylindrical shape
Part；
Step B：Two ends to cylindrical shape forging carry out pressing forging, the two ends of forging is formed flat board, make forging
Middle part is forged into the shape of cylinder plus round platform；Whole forging is formed preforming middle base 5 (forging), it is described it is preforming in
Between base 5 include：Cylinder 50, the round platform positioned at the cylinder two ends cut out the round platform on inclined-plane and positioned at the round platform two ends
Flat board；
Step C：The preforming middle base 5 is placed on the lower mould 3 of marine diesel crank bending forging tools；
Step D：The mold 1 for bending forging tools using marine diesel crank is pressed on the preforming middle base 5
On, forging molding is carried out to the preforming middle base, form the forging 58 after bend-forging.
Further,
Step C specifically includes step C1：Make the flat support on the V-arrangement opening, the two ends of the flat board are stretched out
The V-arrangement opening, makes the V-arrangement opening contain the cylinder and round platform, so that primary deformable can be carried out in mould.
Further,
Step D specifically includes step D1：The mold bottom surface 10 is set to be pressed on the arc surface of the cylinder 50, can
Reduce forging process in crank arm root appearance stress concentration or other deformation defects, the preforming middle base 5 is forged
Type is caused, the forging 58 after bend-forging is formed.
The utility model improves the profile of preforming middle base by adjusting marine diesel crank forging technology, and
The design of new mold and lower mould, solves the heat processing technique defect that crank is formed during bending process is forged and pressed, and carries
Stock utilization high.
The schematical specific embodiment of the utility model is the foregoing is only, model of the present utility model is not limited to
Enclose.For each part of the present utility model can be mutually combined under conditions of not conflicting, any those skilled in the art,
Done equivalent variations and modification, all should belong to this practicality new on the premise of design of the present utility model and principle is not departed from
The scope of type protection.
Claims (6)
1. a kind of marine diesel crank bends forging tools, for forging to be molded, it is characterised in that the marine diesel
Crank bending forging tools includes：
Supporting the lower mould of the forging, the lower mould has：Lower mould bottom surface, lower mould first side and lower mould second
Side, the lower mould first side and lower mould second side are both connected on the lower mould bottom surface；The lower mould
V-arrangement opening is formed between first side and lower mould second side, the V-arrangement opening forms the forming cavity of the forging forging；
The mold on the forging is pushed against, the mold is V-type anvil, and the V-type anvil includes：Mold bottom surface and
Mold first side, mold second side, the side of mold the 3rd on the mold bottom surface are circumferentially connected to successively
Face and the side of mold the 4th, the mold first side and the side of mold the 3rd form v-angle；The mold
Two side faces and the side of mold the 4th are parallel to each other；The mold first side and mold second side meet at right angle；
Wherein, the mold first side is facing with lower mould first side, the side of the mold the 3rd and lower mould
Second side is facing, and the mold bottom surface is the circular arc that in the vertical direction is recessed upwards.
2. marine diesel crank as claimed in claim 1 bends forging tools, it is characterised in that the V-type folder of the V-type anvil
Angle of the angle more than the V-arrangement opening.
3. marine diesel crank as claimed in claim 1 bends forging tools, it is characterised in that the V-type folder of the V-type anvil
Angle is 25 to 28 degree.
4. marine diesel crank as claimed in claim 1 bends forging tools, it is characterised in that the folder of the V-arrangement opening
Angle is 14 to 16 degree.
5. marine diesel crank as claimed in claim 1 bends forging tools, it is characterised in that the mold also has
Be connected to mold first side, mold second side, the side of mold the 3rd and the side of mold the 4th top it is upper
Die top, the mold top surface is plane.
6. marine diesel crank as claimed in claim 5 bending forging tools, it is characterised in that the mold top surface is
Rectangle plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621404943.1U CN206276860U (en) | 2016-12-21 | 2016-12-21 | marine diesel engine crank bending forging tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621404943.1U CN206276860U (en) | 2016-12-21 | 2016-12-21 | marine diesel engine crank bending forging tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206276860U true CN206276860U (en) | 2017-06-27 |
Family
ID=59072884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621404943.1U Active CN206276860U (en) | 2016-12-21 | 2016-12-21 | marine diesel engine crank bending forging tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206276860U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583620A (en) * | 2016-12-21 | 2017-04-26 | 中冶京诚工程技术有限公司 | marine diesel engine crank bending forging tool and method |
| CN109201997A (en) * | 2017-07-03 | 2019-01-15 | 上海昌强重工机械有限公司 | The processing mold and its processing technology of large-scale built-up crankshaft crank peculiar to vessel |
| CN112676529A (en) * | 2020-11-18 | 2021-04-20 | 沈阳中钛装备制造有限公司 | Method for freely forging balance elbow and auxiliary tool for freely forging balance elbow |
-
2016
- 2016-12-21 CN CN201621404943.1U patent/CN206276860U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583620A (en) * | 2016-12-21 | 2017-04-26 | 中冶京诚工程技术有限公司 | marine diesel engine crank bending forging tool and method |
| CN109201997A (en) * | 2017-07-03 | 2019-01-15 | 上海昌强重工机械有限公司 | The processing mold and its processing technology of large-scale built-up crankshaft crank peculiar to vessel |
| CN112676529A (en) * | 2020-11-18 | 2021-04-20 | 沈阳中钛装备制造有限公司 | Method for freely forging balance elbow and auxiliary tool for freely forging balance elbow |
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