CN109706394A - Large ship cylinder cover for diesel engine and forming method - Google Patents
Large ship cylinder cover for diesel engine and forming method Download PDFInfo
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- CN109706394A CN109706394A CN201811650545.1A CN201811650545A CN109706394A CN 109706394 A CN109706394 A CN 109706394A CN 201811650545 A CN201811650545 A CN 201811650545A CN 109706394 A CN109706394 A CN 109706394A
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- forging
- diesel engine
- cylinder cover
- large ship
- ship cylinder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a kind of purposes that not only play compacting forging core tissue, and the own wt of forging can be reduced again, reduce machining allowance, the large ship cylinder cover for diesel engine and forming method of mechanical strength, heat-resisting quantity simultaneously, mass fraction %:C0.15~0.20, Si0.15~0.35, Mn0.50~0.80, Cr1.05~1.20, Ni≤0.40, Mo0.40~0.50, P≤0.025, S≤0.025, remainder are iron.Advantage: not only making the bowl-type hole forged not generate very big offset and processing is caused to be scrapped, and by under the mutual extrusion of molding drain cap, bowl-type punching pin and forging hammering block three-dimensional stress, achieve the purpose that forge ventilative the combustion chamber, to improve the inherent quality of product.
Description
Technical field
The present invention relates to a kind of purposes that not only play compacting forging core tissue, and can reduce forging itself
Weight reduces machining allowance, while the large ship cylinder cover for diesel engine and forming method of mechanical strength, heat-resisting quantity, belongs to bavin
Oil machine cylinder head manufacturing field.
Background technique
1. large ship cylinder cover for diesel engine forging is dish-shaped forgings with the level, the main delivery gauge of product is flange
Diameter ￠ 1110mm, stepped diameters ￠ 870mm, forging total height 505mm, Intermediate Gray bowl-type bore dia ￠ 592mm, straight hole diameter
￠ 350mm.(specific size is as shown below) forging blank weighs 3.02t, and material ingot weight 8t a, ingot forges two pieces, and forging ratio is wanted
Ask >=4.0.
2. the material of large ship cylinder cover for diesel engine forging is watt Ceylon gauge material 16CrMo44, chemical component is wanted
(mass fraction, %) is asked, is as follows:
3. the mechanical property requirements of large ship cylinder cover for diesel engine forging, are as follows:
4. the inherent quality of large ship cylinder cover for diesel engine forging must satisfy classification society and watt Ceylon's ultrasonic examination specification
It is required that.
Summary of the invention
Purpose of design: avoiding the shortcoming in background technique, designs a kind of not only to play and is compacted forging core tissue
Purpose, and the own wt of forging can be reduced again, reduce machining allowance, while the argosy of mechanical strength, heat-resisting quantity
Oceangoing ship cylinder cover for diesel engine and forming method.
Technological difficulties of the invention are: 1. due to large ship cylinder cover for diesel engine forging be marine diesel movement portion
Core component in part.Its quality directly affects the superiority and inferiority of performance of marine diesel engine.Therefore, boat diesel engine cylinder
Lid forging not only needs enough mechanical strengths, heat-resisting quantity, but also its combustion chamber must also be without any defect.Traditional forging
Moulding process is made, the flaw detection qualification rate of combustion chamber regions position is only 60% or so, causes biggish economic damage to enterprise
It loses.2. in order to improve the inherent quality of boat diesel engine cylinder head forging, it is necessary to find one and be able to achieve the way for forging bowl-type hole
Diameter, will not only play the purpose of compacting forging core tissue, but also can reduce the own wt of forging again, reduce machining allowance.
3. being forged repeatedly before bowl-type hole forges to steel ingot, it is necessary to assure the blank after blanking has sufficiently large initial forging ratio,
It prepares for molding later.4. to forge the bowl-type hole of cylinder head forging just must the punching pin of design specialized realized,
But to take into account punching pin simultaneously can smoothly take out after punching.
In order to solve technological difficulties of the invention, the present invention on the basis of existing technology, is innovated as follows
1. in order to which guarantee large ship cylinder cover for diesel engine forging has enough mechanical strengths, heat-resisting quantity 16CrMo44 material
Corresponding national standard material is 15CrMo, is compared on meeting 16CrMo44 standard base by ingredient, has carried out material composition
Internal control.Chemical component after internal control is as follows:
2. in order to guarantee the inherent quality requirement of product, the present invention has abandoned original using under pulling after jumping-up of 9t steel ingot
Two material, after round as a ball blank in drain cap molding process program；The 8t steel ingot that uses of innovation carries out steel ingot before blanking
Upsetting pull twice takes spherical surface upset plate jumping-up at the mouth of a river end of steel ingot when jumping-up, the objectionable impurities at mouth of a river end is made to be extruded into ball outward
Shape face is conducive to be cut off when blanking completely, is unlikely to forge into influence quality in product.
3. carrying out direct forging molding to the bowl-type hole of cylinder head forging after meeting initial forging ratio.According to bowl-type
The size in hole devises bowl-type punching pin, designs the draft angle of punching pin at 5 °~7 °, and being conducive to can be smoothly after bowl-type hole forming
Slave forging in be detached from, prevent forging and punching pin from killing phenomenon.
4. blank needs drain cap to forge downward when forming and forging step in drain cap, conversely, when forging bowl-type hole, using work
Part turn-over, drain cap put the forging scheme of bowl-type punching pin punching again upward.Such forging method not only makes the bowl-type forged
Hole will not generate very big offset and processing is caused to be scrapped, and pass through molding drain cap, bowl-type punching pin and forging hammering block three
To under the mutual extrusion of stress, achieve the purpose that forge ventilative the combustion chamber, to improve the inherent quality of product.
Technical solution 1: a kind of large ship cylinder cover for diesel engine (mass fraction %), C0.15~0.20, Si0.15~
0.35, Mn0.50~0.80, Cr1.05~1.20, Ni≤0.40, Mo0.40~0.50, P≤0.025, S≤0.025, remainder are
Iron.
Technical solution 2: a kind of large ship cylinder cover for diesel engine production method, 1) forging: large ship cylinder of diesel engine
3.02 t of lid forge weight, material specification are 8t plum blossom ingot, an ingot forging two pieces；Comprehensive forging ratio 5.7；Forging temperature: 1240
DEG C~800 DEG C；I fire: steel ingot bar hold to ￠ 420mmx700mm, jumping-up is to ￠ on ￠ 450mm jumping-up drain cap
1140mm, pulling blank to 800 about 1600 mm long of all directions；It takes spherical surface upset plate and carries out second on ￠ 450mm jumping-up drain cap
Secondary jumping-up, pulling blank to 600mm are earnestly two sections, every segment length 1400mm returns stove heating from all directions；IIth fire: upsetting after coming out of the stove
Thick and round as a ball blank is put into pre-profiling in the alternative drain cap that diameter of bore is ￠ 880mm, takes out round as a ball flange to ￠ 850mm,
It turns over, puts on the special molding drain cap that diameter of bore is ￠ 900mm, place the dedicated bowl-type punching pin of ￠ 450mm and rush blind hole；Finally again
Turn rushes the hole ￠ 275mm and punches through blind hole, completes after smooth；2) heat treatment after forging: heating up 10 hours to 920 ± 10 DEG C with furnace,
It is air-cooled after heat preservation 14 hours；620 ± 10 DEG C are warming up to furnace again, the air-cooled normalizing+tempering heat treatment come out of the stove after heat preservation 20 hours
Technique；3) property heat treatment: quenching was using water cooling 60 minutes after being warming up to 910 ± 10 DEG C, heat preservation 8 hours with furnace；Tempering uses
680 ± 10 DEG C are warming up to furnace, the air-cooled heat treatment process come out of the stove after heat preservation 16 hours.
Compared with the background technology, the present invention, so that the bowl-type hole forged is not generated very big offset and cause to add
Work is scrapped, and by the way that it is ventilative to have reached forging under the mutual extrusion of molding drain cap, bowl-type punching pin and forging hammering block three-dimensional stress
The purpose of the combustion chamber, to improve the inherent quality of product.
Specific embodiment
1. forging process:
3.02 t of large ship cylinder cover for diesel engine forge weight, material specification are 8t plum blossom ingot, an ingot forging two pieces；Comprehensive forging
It makes than 5.7；Forging temperature: 1240 DEG C~800 DEG C.
I fire: steel ingot bar hold to ￠ 420mmx700mm, on ￠ 450mm jumping-up drain cap jumping-up to ￠ 1140mm,
Blank is pulled out to 800 about 1600 mm long of all directions；It takes spherical surface upset plate and carries out second of jumping-up on ￠ 450mm jumping-up drain cap,
Blank is pulled out to all directions 600mm, is earnestly two sections, every segment length 1400mm returns stove heating.
IIth fire: jumping-up and round as a ball blank are put into the alternative leakage that diameter of bore is ￠ 880mm to ￠ 850mm after coming out of the stove
Round as a ball flange is taken out in pre-profiling in disk, turns over, and puts on the special molding drain cap that diameter of bore is ￠ 900mm, places ￠
The dedicated bowl-type punching pin of 450mm rushes blind hole；Finally turn over again and rush the hole ￠ 275mm and punch through blind hole, it is smooth after completion.
2. heat treatment after forging:
Heat treatment after forging has great influence to the property heat treatment of forging internal soundness and next step, therefore, in order to eliminate
The forging internal stress of large ship cylinder cover for diesel engine forging refines crystal grain, makes Tissue homogenization, reduces hardness, is more advantageous to and cuts
Processing is cut, makees structural preparation for further heat treatment, has specially formulated and heated up 10 hours to 920 ± 10 DEG C with furnace, heat preservation 14
It is air-cooled after hour；620 ± 10 DEG C are warming up to furnace again, the air-cooled normalizing+tempering heat treatment process come out of the stove after heat preservation 20 hours.
3. property heat treatment:
In order to make large ship cylinder cover for diesel engine forging obtain good comprehensive mechanical performance, quenching is specially formulated using with furnace liter
Temperature is to 910 ± 10 DEG C, water cooling 60 minutes after heat preservation 8 hours；After tempering is using being warming up to 680 ± 10 DEG C, heat preservation 16 hours with furnace
The air-cooled heat treatment process come out of the stove.
Test result of the invention
1. the practical chemical component value of large ship cylinder cover for diesel engine forging see the table below, meet ship inspection specification and customer drawings
Technical requirements.
Practical chemical component value (mass fraction %)
| Heat (batch) number | C | Si | Mn | S | P | Cr | Ni | Mo |
| 11-68001-1 | 0.17 | 0.19 | 0.70 | 0.010 | 0.009 | 1.14 | 0.15 | 0.48 |
| 11-68001-2 | 0.18 | 0.23 | 0.65 | 0.007 | 0.015 | 1.16 | 0.20 | 0.46 |
2. the mechanical properties results (such as following table) of large ship cylinder cover for diesel engine forging meet ship inspection specification and customer drawings
Technical requirements.
3. large ship cylinder cover for diesel engine forging is detected through ultrasonic examination without finding any excessive defect, meet China
Classification society's ship examines code requirement.
It is to be understood that: although above-described embodiment retouches mentality of designing of the invention detailed text of contrasting
It states, but these verbal descriptions, only the simple text of mentality of designing of the present invention is described, rather than to mentality of designing of the present invention
Limitation, any combination, increase or modification without departing from mentality of designing of the present invention falls within the protection scope of the present invention.
Claims (6)
1. a kind of large ship cylinder cover for diesel engine, it is characterized in that mass fraction %:C0.15~0.20, Si0.15~0.35,
Mn0.50~0.80, Cr1.05~1.20, Ni≤0.40, Mo0.40~0.50, P≤0.025, S≤0.025, remainder are iron.
2. large ship cylinder cover for diesel engine according to claim 1, it is characterized in that: C0.17, Si0.19, Mn0.70,
Cr1.14、Ni0.15、Mo0.48、P0.009、S0.010。
3. large ship cylinder cover for diesel engine according to claim 2, it is characterized in that: tensile strength Rm(MPa) 617, it bends
Take intensity Rp0.2(MPa) 477, elongation A%25.6, contraction percentage of area Z%76.9, notched bar impact strength (20 DEG C) Kv2
(J) 184.0,194.0,225.0(takes three test sections).
4. large ship cylinder cover for diesel engine according to claim 1, it is characterized in that: C0.18, Si0.23, Mn0.65,
Cr1.16、Ni0.20、Mo0.46、P0.009、S0.015。
5. large ship cylinder cover for diesel engine according to claim 4, it is characterized in that: tensile strength Rm(MPa) 608, it bends
Take intensity Rp0.2(MPa) 465, elongation A%24.5, contraction percentage of area Z%73.0, notched bar impact strength (20 DEG C) Kv2(J)
205.0,214.0,235.0(takes three test sections).
6. a kind of large ship cylinder cover for diesel engine production method, it is characterized in that:
1) it forges:
3.02 t of large ship cylinder cover for diesel engine forge weight, material specification are 8t plum blossom ingot, an ingot forging two pieces；Comprehensive forging
It makes than 5.7；Forging temperature: 1240 DEG C~800 DEG C；
I fire: steel ingot bar hold to ￠ 420mmx700mm, jumping-up is pulled out to ￠ 1140mm on ￠ 450mm jumping-up drain cap
Blank to 800 from all directions about 1600 mm long；It takes spherical surface upset plate and carries out second of jumping-up on ￠ 450mm jumping-up drain cap, pull out
Blank is earnestly two sections, every segment length 1400mm returns stove heating from all directions to 600mm；
IIth fire: jumping-up and round as a ball blank are put into the alternative drain cap that diameter of bore is ￠ 880mm to ￠ 850mm after coming out of the stove
Round as a ball flange is taken out in pre-profiling, turns over, and puts on the special molding drain cap that diameter of bore is ￠ 900mm, it is special to place ￠ 450mm
Blind hole is rushed with bowl-type punching pin；Finally turn over again and rush the hole ￠ 275mm and punch through blind hole, it is smooth after completion；
2) heat treatment after forging:
It heats up 10 hours to 920 ± 10 DEG C with furnace, it is air-cooled after heat preservation 14 hours；620 ± 10 DEG C are warming up to furnace again, heat preservation 20 is small
When after the air-cooled normalizing+tempering heat treatment process come out of the stove；
3) property heat treatment:
Quenching was using water cooling 60 minutes after being warming up to 910 ± 10 DEG C, heat preservation 8 hours with furnace；Tempering using be warming up to 680 with furnace ±
10 DEG C, the air-cooled heat treatment process come out of the stove after heat preservation 16 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811650545.1A CN109706394B (en) | 2018-12-31 | 2018-12-31 | Large-scale marine diesel engine cylinder cover and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811650545.1A CN109706394B (en) | 2018-12-31 | 2018-12-31 | Large-scale marine diesel engine cylinder cover and forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109706394A true CN109706394A (en) | 2019-05-03 |
| CN109706394B CN109706394B (en) | 2020-08-04 |
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ID=66260440
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811650545.1A Active CN109706394B (en) | 2018-12-31 | 2018-12-31 | Large-scale marine diesel engine cylinder cover and forming method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109706394B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877595A (en) * | 2020-12-30 | 2021-06-01 | 宝鼎重工有限公司 | Novel rudder cylinder forging piece formed by forging instead of casting |
| CN113957341A (en) * | 2021-10-16 | 2022-01-21 | 宝鼎重工有限公司 | Pump shell forging for furnace water circulating pump and manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568162A (en) * | 2015-12-23 | 2016-05-11 | 宝鼎科技股份有限公司 | Marine low-speed and high-power diesel engine connecting rod forge piece and manufacturing technology |
-
2018
- 2018-12-31 CN CN201811650545.1A patent/CN109706394B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105568162A (en) * | 2015-12-23 | 2016-05-11 | 宝鼎科技股份有限公司 | Marine low-speed and high-power diesel engine connecting rod forge piece and manufacturing technology |
Non-Patent Citations (2)
| Title |
|---|
| 刘明延等: "《板坯连铸机：制造工艺与生产管理》", 30 April 1995 * |
| 尚传昌等: "上海船厂-苏尔寿7RTA52U柴油机", 《柴油机》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877595A (en) * | 2020-12-30 | 2021-06-01 | 宝鼎重工有限公司 | Novel rudder cylinder forging piece formed by forging instead of casting |
| CN112877595B (en) * | 2020-12-30 | 2022-03-29 | 宝鼎重工有限公司 | Rudder barrel forging formed by forging instead of casting |
| CN113957341A (en) * | 2021-10-16 | 2022-01-21 | 宝鼎重工有限公司 | Pump shell forging for furnace water circulating pump and manufacturing method |
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| Publication number | Publication date |
|---|---|
| CN109706394B (en) | 2020-08-04 |
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Effective date of registration: 20230421 Address after: 311106 group 1, Tangjiadai village, Tangqi Town, Linping District, Hangzhou City, Zhejiang Province Patentee after: Baoding Heavy Industry Co.,Ltd. Address before: 311106 in Tangqi Town Industrial Park, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: BAODING TECHNOLOGY Co.,Ltd. |
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