CN109014010A - A kind of extrusion forming device and forming method of marine low speed diesel engine crank forged piece - Google Patents
A kind of extrusion forming device and forming method of marine low speed diesel engine crank forged piece Download PDFInfo
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- CN109014010A CN109014010A CN201811110491.XA CN201811110491A CN109014010A CN 109014010 A CN109014010 A CN 109014010A CN 201811110491 A CN201811110491 A CN 201811110491A CN 109014010 A CN109014010 A CN 109014010A
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- inner sleeve
- blank
- extrusion
- mold
- extrusion die
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Classifications
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- 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
Abstract
The present invention provides a kind of extrusion forming device of marine low speed diesel engine crank forged piece, including squeezing inner sleeve, outer sleeve body, upper punch and moving bedplate, it is corresponding with the center of moving bedplate to squeeze inner sleeve, outer sleeve body, outer sleeve body is located at the outside for squeezing inner sleeve, squeezing inner sleeve includes interior set body and the inner sleeve bottom plate for being located at its bottom, outer sleeve body and inner sleeve bottom plate are fixed on moving bedplate, in the upper punch blank moving up and down being arranged in inside inner sleeve.The forming method of above-mentioned apparatus, comprising: base；Extrusion die assembling；Extrusion die lubrication；Extrusion die preheating；Blank heating；Dephosphorization；Extrusion forming；Move back mould.The present invention can greatly reduce crank forged piece size surplus, to reduce forging stock weight, reduce machining allowance, improve stock utilization, reduce manufacturing cost.
Description
Technical field
The present invention relates to a kind of extrusion forming device, especially a kind of extrusion forming of marine low speed diesel engine crank forged piece
Device and forming method.
Background technique
Crank throw is larger as the important component forging difficulty for constituting semi-built-up crankshaft used for large boat, and its volume it is big,
Forming is complicated, and forging also to be required to have good fiber flow direction.
The forging method of existing large size crank throw has following several:
The first, block type forging method；The forming process of block type forging method is as shown in Figure 1, by crank blank forging at one
There is a square of corner angle, then the advantages of method this by a kind of crank manufacturing process of machining excision excess metal is: shape
Shape is simple, and forming is easy, and forges without mold, and forging times are few；The shortcomings that this method is: the forging of this method production is not only
Machining allowance is big, at high cost, and quality is difficult up to standard, and rejection rate is higher.
Second, ring forges method；Ring forges the forming process of method as shown in Fig. 2, with hollow steel ingot or the steel loop through punching is first forged
Then U-shaped blank out is extruded the taper on blank two sides using press, then makes blank by the vertical blank with a die forging block
Forming.Its advantage is that part machining allowance is small, is cranking arm and be not in field trash on crank-pin after machining, having simultaneously
Preferable metal streamline.The shortcomings that this method is: forming difficulty, complex process, stock utilization and formability are poor, forging
In it is also possible that the defects of stomata.
The third, die forging；Steel ingot as shown in figure 3, be pressed into block by chamfered edge, jumping-up first by the forming process of die forging
Shape blank, is then placed into die cavity, covers compacting mould, is suppressed with hydraulic press, is further compacted steel ingot internal defect etc. and lacks
It falls into, and makes bottom full of die cavity, finally indentation formed punch is rived, and blank is counter to be squeezed, and is allowed to be configured to crank left and right arms.In its advantage makes
Dense structure of portion does not destroy the fibre flow of crank metal, and qualification rate is higher, and the forging process time is short, stock utilization also compared with
It is high；The shortcomings that this method is: tooling is costly, and forming force is big, and equipment tonnage is big, operating difficulties, and later period demoulding is difficult.
4th kind, curved forging method；The forming process of curved forging method singly turns shape blank as shown in figure 4, first manufacturing into, then curved
It is bent on bent mould bases, finishing touch forming.The shortcomings that this method is: qualification rate is low, and energy consumption is high, at high cost.Curved forging method is main
Including being swaged into slab, bending and pressing three phases in advance.It is first pressed into slab, is then bent on bending mould bases, is finally flattened and repair
It is made into shape.This method biggest advantage is that mold is simple, and required forming force is smaller, easy to operate, and forming is easy, metallic fiber
It flows to.But the disadvantage is that the defects of being also easy to produce folding, ultra-wide in curved forging process, on forging quality and stock utilization influence compared with
Greatly.
5th kind, upsetting method, the forming process of upsetting method is as shown in figure 5, upsetting method major advantage is: stock utilization
Height, metal forging streamline continuity is good, and machine-finish allowance is also smaller, and machining time is short, and comprehensive mechanical performance is also relatively steady
It is fixed.The shortcomings that this forging method is to need a set of dedicated forging die and its auxiliary device, and manufacturing cost is higher, is not suitable for small lot
Production.
Summary of the invention
Aiming at the shortcomings existing in the above problems, the present invention provides one kind and can greatly reduce more than crank forged piece size
Amount reduces machining allowance to reduce forging stock weight, improves stock utilization, reduces a kind of marine low-speed of manufacturing cost
The extrusion forming device and forming method of diesel engine crank forged piece.
To achieve the above object, the present invention provides a kind of extrusion forming device of marine low speed diesel engine crank forged piece, packet
It includes and squeezes inner sleeve, outer sleeve body, upper punch and moving bedplate, in the extruding inner sleeve, the outer sleeve body and the moving bedplate
Heart position is corresponding, and the outer sleeve body is located at the outside for squeezing inner sleeve, and the extruding inner sleeve includes interior set body and is located at it
The inner sleeve bottom plate of bottom, the outer sleeve body and the inner sleeve bottom plate are fixed on the moving bedplate, and the upper punch can be upper and lower
In the mobile blank being arranged in inside the inner sleeve.
The extrusion forming device of above-mentioned a kind of marine low speed diesel engine crank forged piece, wherein the interior set body includes outer
Side plate set is constituted with inside sleeve-board on its interior, and the inside of the inside sleeve-board forms blank cavity.
The extrusion forming device of above-mentioned a kind of marine low speed diesel engine crank forged piece, wherein the moving bedplate includes
Bottom plate, guide assembly, connecting plate and extruding axle pad plate, the connecting plate are connected by bolt with the extruding axle pad plate, institute
It states and squeezes on axle pad plate and the guide assembly, the guide assembly is fixed on the bottom plate, and the inner sleeve bottom plate is fixed on
On the connecting plate.
The extrusion forming device of above-mentioned a kind of marine low speed diesel engine crank forged piece, wherein in the outer sleeve body
Surface is coated with the lubricant being prepared by molybdenum disulfide and lead powder.
The present invention also provides a kind of forming methods of the extrusion forming device of marine low speed diesel engine crank forged piece, including with
Lower step:
Step 1, base: bet steel ingot open die forging mode is pressed into rectangular blank；
Step 2, extrusion die assembling；
Step 3, extrusion die lubrication: to mold inner-cavity and formed punch outer surface even application XB-59 Hmp grease；
Step 4, extrusion die preheating；
Step 5, blank heating；
Step 6, dephosphorization: dephosphorization processing is carried out during will heat blank and transport to extruder；
Step 7, extrusion forming；
Step 8 moves back mould: after extruded stock is cooled to 100 DEG C or so, mobile platform is back to the loading station material returned；
Step 9 hangs out workpiece, manages into furnace treatment.
Above-mentioned forming method, wherein in step 2 include following sub-step:
Extruding inner sleeve is docked by drawing position and is placed into formation mold entirety on moving bedplate by step 21, so that squeezing
Press the center line of inner sleeve corresponding with the center of moving bedplate；
Step 22, outer sleeve body inner surface be coated with the lubricant being prepared by molybdenum disulfide and lead powder, by outer sleeve body
It is assembled into extrusion die lower die with inner sleeve is squeezed, and makes the center line of extrusion die lower die and the centre bit of moving bedplate setting
It sets corresponding, and extrusion die lower die is fixed along outer sleeve body fixing groove by pressing plate and bolt；
Formed punch is fixed on host extrusion die backing plate by step 23, is fixed with after backing plate center centering in extrusion die,
Manually, fixture nut is selected on formed punch by turntable cooperation crane, is fixed to formed punch in extrusion die on backing plate；
Step 24, discharging device are fixed on the hydraulic cylinder among host supporting beam, for exiting blank.
Above-mentioned forming method, wherein in step 4 include following sub-step:
Step 41 preheats mold using electric heating sheets, so that the preheating temperature of mold is greater than 350 DEG C or more；
Step 42 preheats jumper bar using electric heating sheets, and preheating temperature is greater than 350 DEG C；
After step 43, mold are preheating to assigned temperature, mold lubrication situation is checked.
Above-mentioned forming method, wherein in steps of 5 include following sub-step:
Blank is placed on the parallels and protective frame of trolley heating furnace by step 51；
Step 52, after being heated to temperature, trolley is outputed, hanged with suspender, is hoisted to extruder preset die station；
Step 53, hot forging base reach at predetermined station, and blank and die cavity are put into mold vertically to just.
Above-mentioned forming method, wherein in step 7 include following sub-step:
After step 71, blank are put into mold, moving bedplate is pushed into punching station；
After step 72, arrival punching station, dynamic beam moves up 550mm, press depth 500mm, and dynamic beam returns to zero-bit, to
Gasifying agent is added in 500mm deep hole, and dynamic beam moves up 2500mm again, completes punching press, used time 3min.
Step 73, dynamic beam return to zero-bit, and formed punch exits mold.
Compared with prior art, the invention has the following advantages that
The present invention can greatly reduce crank forged piece size surplus, to reduce forging stock weight, reduce machining allowance, mention
High stock utilization reduces manufacturing cost；
The present invention can be realized Quick-forming demoulding, and serialization degree is high, so as to shorten the manufacturing cycle of product, efficiency
Height, and it is easy to operate；
The metal streamline of the crank peculiar to vessel of large size manufactured by the present invention is good, dense structure, good mechanical property.
Detailed description of the invention
Fig. 1 is the schematic diagram of the forming process of prior art block type forging method；
Fig. 2 is the schematic diagram of the forming process of prior art ring forging method；
Fig. 3 is the schematic diagram of the forming process of prior art die forging；
Fig. 4 is the schematic diagram of the forming process of the curved forging method of the prior art；
The schematic diagram of the forming process of Fig. 5 prior art upsetting method；
Fig. 6 is structural block diagram of the invention；
Fig. 7 is the side view of Fig. 1；
Fig. 8 is the top view of Fig. 1；
Fig. 9 is charging schematic diagram；
Figure 10 a and Figure 10 b is the schematic diagram of blank；
Figure 11 a and Figure 11 b is the crank throw schematic diagram to be formed.
Main appended drawing reference is described as follows:
1- upper punch；2- outer sleeve body；Sleeve-board on the outside of 3-；Sleeve-board on the inside of 4-；5- inner sleeve bottom plate；6- blank；7- moving bedplate；
71- bottom plate；72- guide rail a；73- guide rail b；74- connecting plate；75- squeezes axle pad plate
Specific embodiment
As shown in Fig. 7 to Figure 11 b, the present invention provides a kind of extrusion forming device of marine low speed diesel engine crank forged piece,
Including squeezing inner sleeve, outer sleeve body 2, outer sleeve body 21 and moving bedplate 7, the centre bit of inner sleeve, outer sleeve body 2 and moving bedplate 7 is squeezed
Set it is corresponding, outer sleeve body 2 be located at squeeze inner sleeve outside, squeeze inner sleeve include interior set body, be located at its bottom inner sleeve bottom plate
5, outer sleeve body 2 and inner sleeve bottom plate 5 are fixed on moving bedplate 7, the base moving up and down being arranged in inside inner sleeve of outer sleeve body 21
In material 6.
Wherein, interior set body includes that outside sleeve-board 3 and inside sleeve-board 4 on its interior are constituted, the inside of inside sleeve-board 4
Form blank cavity.
Wherein, moving bedplate 7 includes bottom plate 71, guide assembly, connecting plate 74 and squeezes axle pad plate 75, and connecting plate 74 passes through
Bolt is connected with axle pad plate 75 is squeezed, and squeezes on axle pad plate 75 and guide assembly, guide assembly is fixed on bottom plate 71, inner sleeve
Bottom plate 715 is fixed on connecting plate 74.
Wherein, squeezing axle pad plate 75 includes squeezing using extruding axle pad plate made of 950 materials and using made of 755 materials
Last item backing plate.
Guide assembly includes guide rail a72 and guide rail b73.
In addition, the inner surface in outer sleeve body 2 is coated with the lubricant being prepared by molybdenum disulfide and lead powder.
The present invention also provides a kind of forming methods of the extrusion forming device of marine low speed diesel engine crank forged piece, including with
Lower step:
Step 1, base: bet steel ingot open die forging mode is pressed into rectangular blank.
Step 2, extrusion die assembling.
In step 2 include following sub-step:
Extruding inner sleeve is docked by drawing position and is placed into formation mold entirety on moving bedplate by step 21, so that squeezing
Press the center line of inner sleeve corresponding with the center of moving bedplate 7；
Step 22, outer sleeve body 2 inner surface be coated with the lubricant being prepared by molybdenum disulfide and lead powder, by outer sleeve body
It is assembled into extrusion die lower die with inner sleeve is squeezed, and makes the center line of extrusion die lower die and the centre bit of moving bedplate setting
It sets corresponding, and extrusion die lower die is fixed along outer sleeve body fixing groove by pressing plate and bolt；
Formed punch is fixed on host extrusion die backing plate by step 23, is fixed with after backing plate center centering in extrusion die,
Manually, fixture nut is selected on formed punch by turntable cooperation crane, is fixed to formed punch in extrusion die on backing plate；
Step 24, discharging device are fixed on the hydraulic cylinder among host supporting beam, for exiting blank.
Step 3, extrusion die lubrication: to mold inner-cavity and formed punch outer surface even application XB-59 Hmp grease.
Step 4, extrusion die preheating.
In step 4 include following sub-step:
Step 41 preheats mold using electric heating sheets, so that the preheating temperature of mold is greater than 350 DEG C or more；
Step 42 preheats jumper bar using electric heating sheets, and preheating temperature is greater than 350 DEG C；
After step 43, mold are preheating to assigned temperature, mold lubrication situation is checked.
Step 5, blank heating.
In steps of 5 include following sub-step:
Blank 6 is placed on the parallels and protective frame of trolley heating furnace by step 51；
Step 52, after being heated to temperature, trolley is outputed, hanged with suspender, is hoisted to extruder preset die station；
Step 53, hot forging base reach at predetermined station, and blank 6 and die cavity are put into mold vertically to just.
Step 6, dephosphorization: dephosphorization processing is carried out during will heat blank 6 and transport to extruder.
Step 7, extrusion forming.
In step 7 include following sub-step:
After step 71, blank 6 are put into mold, moving bedplate 7 is pushed into punching station；
After step 72, arrival punching station, dynamic beam moves up 550mm, press depth 500mm, and dynamic beam returns to zero-bit, to
Gasifying agent is added in 500mm deep hole, and dynamic beam moves up 2500mm again, completes punching press, used time 3min.
Step 73, dynamic beam return to zero-bit, and formed punch exits mold.
Step 8 moves back mould: after extruded stock is cooled to 100 DEG C or so, mobile platform is back to the loading station material returned；
Step 9 hangs out workpiece, manages into furnace treatment.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative and not restrictive for the invention.
Those skilled in the art understand that many changes can be carried out in the spirit and scope defined by invention claim to it, modify,
It is even equivalent, but fall in protection scope of the present invention.
Claims (9)
1. a kind of extrusion forming device of marine low speed diesel engine crank forged piece, which is characterized in that including squeezing inner sleeve, housing
Body, upper punch and moving bedplate, the extruding inner sleeve, the outer sleeve body are corresponding with the center of the moving bedplate, institute
State outer sleeve body be located at it is described squeeze inner sleeve outside, it is described squeeze inner sleeve include interior set body, be located at its bottom inner sleeve bottom plate,
The outer sleeve body and the inner sleeve bottom plate are fixed on the moving bedplate, and the upper punch is moving up and down to be arranged described
In blank inside inner sleeve.
2. a kind of extrusion forming device of marine low speed diesel engine crank forged piece according to claim 1, which is characterized in that
The interior set body includes that outside sleeve-board and inside sleeve-board on its interior are constituted, and the inside of the inside sleeve-board forms blank
Cavity.
3. a kind of extrusion forming device of marine low speed diesel engine crank forged piece according to claim 2, which is characterized in that
The moving bedplate includes bottom plate, guide assembly, connecting plate and squeezes axle pad plate, and the connecting plate passes through bolt and the extruding
Axle pad plate is connected, and on the extruding axle pad plate and the guide assembly, the guide assembly is fixed on the bottom plate, described
Inner sleeve bottom plate is fixed on the connecting plate.
4. a kind of extrusion forming device of marine low speed diesel engine crank forged piece according to any one of claims 1 to 3,
It is characterized in that, the lubricant being prepared by molybdenum disulfide and lead powder is coated in the inner surface of the outer sleeve body.
5. a kind of molding side for the extrusion forming device for implementing a kind of marine low speed diesel engine crank forged piece described in claim 1
Method, comprising the following steps:
Step 1, base: bet steel ingot open die forging mode is pressed into rectangular blank；
Step 2, extrusion die assembling；
Step 3, extrusion die lubrication: to mold inner-cavity and formed punch outer surface even application XB-59 Hmp grease；
Step 4, extrusion die preheating；
Step 5, blank heating；
Step 6, dephosphorization: dephosphorization processing is carried out during will heat blank and transport to extruder；
Step 7, extrusion forming；
Step 8 moves back mould: after extruded stock is cooled to 100 DEG C or so, mobile platform is back to the loading station material returned；
Step 9 hangs out workpiece, manages into furnace treatment.
6. forming method according to claim 5, which is characterized in that in step 2 include following sub-step:
Extruding inner sleeve is docked by drawing position and is placed into formation mold entirety on moving bedplate by step 21, so that in squeezing
The center line of set and the center of moving bedplate are corresponding；
Step 22, outer sleeve body inner surface be coated with the lubricant being prepared by molybdenum disulfide and lead powder, by outer sleeve body and squeeze
The center phase that pressure inner sleeve is assembled into extrusion die lower die, and the center line of extrusion die lower die is set with moving bedplate
It is corresponding, and extrusion die lower die is fixed along outer sleeve body fixing groove by pressing plate and bolt；
Formed punch is fixed on host extrusion die backing plate by step 23, with fixed after backing plate center centering in extrusion die, people
Fixture nut is selected on formed punch by work, turntable cooperation crane, is fixed to formed punch in extrusion die on backing plate；
Step 24, discharging device are fixed on the hydraulic cylinder among host supporting beam, for exiting blank.
7. forming method according to claim 5, which is characterized in that in step 4 include following sub-step:
Step 41 preheats mold using electric heating sheets, so that the preheating temperature of mold is greater than 350 DEG C or more；
Step 42 preheats jumper bar using electric heating sheets, and preheating temperature is greater than 350 DEG C；
After step 43, mold are preheating to assigned temperature, mold lubrication situation is checked.
8. forming method according to claim 5, which is characterized in that in steps of 5 include following sub-step:
Blank is placed on the parallels and protective frame of trolley heating furnace by step 51；
Step 52, after being heated to temperature, trolley is outputed, hanged with suspender, is hoisted to extruder preset die station；
Step 53, hot forging base reach at predetermined station, and blank and die cavity are put into mold vertically to just.
9. forming method according to claim 5, which is characterized in that in step 7 include following sub-step:
After step 71, blank are put into mold, moving bedplate is pushed into punching station；
After step 72, arrival punching station, dynamic beam moves up 550mm, press depth 500mm, and dynamic beam returns to zero-bit, to
Gasifying agent is added in 500mm deep hole, and dynamic beam moves up 2500mm again, completes punching press, used time 3min.
Step 73, dynamic beam return to zero-bit, and formed punch exits mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811110491.XA CN109014010B (en) | 2018-09-21 | 2018-09-21 | Extrusion forming device and method for crank forging of marine low-speed diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811110491.XA CN109014010B (en) | 2018-09-21 | 2018-09-21 | Extrusion forming device and method for crank forging of marine low-speed diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109014010A true CN109014010A (en) | 2018-12-18 |
| CN109014010B CN109014010B (en) | 2020-04-10 |
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ID=64618170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811110491.XA Active CN109014010B (en) | 2018-09-21 | 2018-09-21 | Extrusion forming device and method for crank forging of marine low-speed diesel engine |
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| Country | Link |
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| CN (1) | CN109014010B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109848236A (en) * | 2019-01-03 | 2019-06-07 | 南京迪威尔高端制造股份有限公司 | Combination with entire body in large-sized flange divides mould mold extrusion forming method |
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| CN107520394A (en) * | 2017-08-10 | 2017-12-29 | 燕山大学 | The technological equipment and method of crank throw are forged on double action hydraulic press |
| CN108480411A (en) * | 2018-04-03 | 2018-09-04 | 北京科技大学 | A kind of strong flow extrusion molding apparatus of Magnesium alloy strip muscle cylindrical member and method |
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| US3587280A (en) * | 1965-01-21 | 1971-06-28 | Xpress Automation Inc | Method and apparatus for pulling extrusions from an extrusion press |
| CN102371287A (en) * | 2010-08-26 | 2012-03-14 | 哈尔滨建成集团有限公司 | Extrusion die and method for extrusion molding inside and outside reduction blank by same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109848236A (en) * | 2019-01-03 | 2019-06-07 | 南京迪威尔高端制造股份有限公司 | Combination with entire body in large-sized flange divides mould mold extrusion forming method |
| CN109848236B (en) * | 2019-01-03 | 2020-10-13 | 南京迪威尔高端制造股份有限公司 | One-step extrusion forming method of combined die-splitting die with large-sized flange middle body |
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| CN109014010B (en) | 2020-04-10 |
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