CN105478651B - The forging method of boat diesel engine cylinder head - Google Patents
The forging method of boat diesel engine cylinder head Download PDFInfo
- Publication number
- CN105478651B CN105478651B CN201510801599.3A CN201510801599A CN105478651B CN 105478651 B CN105478651 B CN 105478651B CN 201510801599 A CN201510801599 A CN 201510801599A CN 105478651 B CN105478651 B CN 105478651B
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- forging
- finish
- drift
- blank
- mould
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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
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
- B21K3/02—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like cylinder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to shipbuilding technology field there is provided a kind of forging method of boat diesel engine cylinder head, comprise the following steps：A, just forging：First forging mould includes just forging drift and the lower mould of just forging, and just the diameter of forging drift is less than or equal to the diameter of cylinder head centre bore；The lower mould of just forging is provided with just forging shaped vias；A1：Blank is put into just forging shaped vias, the lower mould of just forging is fixed on the upper end of blank, applies pressure to blank upper end, blank lower end forms flange；A2：Just forging drift is punched out to blank, obtains middle base；B, finish-forging：Finish-forging die includes mould under mould under finish-forging drift and finish-forging, finish-forging and is provided with finish-forging shaped vias；Finish-forging drift includes guide head and forming section, and the shapes and sizes of forming section are consistent with combustion chamber；By finish-forging lower die-sleeve in middle base small end outer surface, apply pressure, combustion chamber shaping to finish-forging drift.This method realizes nearly formation shape, and each position quality is guaranteed；Improve stock utilization；Allowance is small, shortens the manufacturing cycle.
Description
Technical field
The present invention relates to shipbuilding technology field, especially a kind of forging method of boat diesel engine cylinder head.
Background technology
Cylinder head, as the fixed member of boat diesel engine, is also the part of burning chamber of diesel engine.Marine diesel
The structural shape of cylinder head is more, at present, and the most widely used cylinder head of large ship is as shown in figure 1, including appearance in the world
Face sets combuster 14 in cylindrical body 12, one end of body 12, and the other end is provided with the flange 11 of circle, flange 11
It is provided with the centre bore 13 communicated with combustion chamber 14.
Complicated, the wall unevenness of body 12 of above-mentioned cylinder cover for diesel engine.In addition, its condition of work, stressing conditions
Also it is sufficiently complex, severe.It is not only by the strong effect of high temperature and high pressure gas, and it is negative periodically to bear higher machinery
Lotus and thermic load, also by the cold and hot irregular influence of the part caused by coolant, while due also to bolt pretightening makes cylinder head
Compression is subject, and makes cylinder head by flecition with gaseous-pressure collective effect, in addition, easy also at changes of section
Stress concentration etc. is produced, therefore, design requirement cylinder head is forging, and integral ultrasonic flaw detection requires strict, especially burns
The nearly top layer of chamber internal surface is not allow for defect presence, i.e., Magnetic testing does not allow existing defects.
Cylinder head belongs to cheese part category from the point of view of global shape, size, in terms of outer surface, with flange 11, from interior table
Face is seen, with the stepped hole that diameter difference is larger.Due to shape abnormity, complexity, in known forging and molding technology, cylinder head
Forging shape has all done certain simplification, though external flanges are all forged, endoporus is simplified with small diameter bore instead of combustion chamber 14
Forge, do not accomplish truly profiling forging, such forming mode improve stock utilization, improve internal soundness and
There is certain limitation in terms of shortening the manufacturing cycle.For example, because endoporus only forges centre bore 13, combustion chamber 14 can only pass through
Machine add mode shapes, and stock utilization is low, and manufacturing cost is high；Because macropore is not forged, combustion chamber inner chamber forge saturating consolidation effect compared with
Difference, because of combustor surface Magnetic testing, to go out the case that defect causes cylinder head to be scrapped not within minority；In addition, to ensure internal matter
Amount, generally needs machine to carry out Tempering and Quenching again after adding combustion chamber step hole shape, the manufacturing cycle is longer after forging.
At present, large ship diesel engine is related to 6 cylinders to 9 cylinder complete series types, and a set of 6 cylinder diesel adds spare part to have 7 gas
Cylinder cap, a set of 9 cylinder diesel adds spare part to have 10 cylinder head, belongs to high-volume parts in ship machine part, if design one
Planting new forging forming method is used to solve the problem of stock utilization is low, internal soundness is unstable, the manufacturing cycle is long, will be one
Plant practical, the new FMT that should be widely promoted.
The content of the invention
The technical problems to be solved by the invention are to provide that a kind of amount of machining is few, stock utilization is high, forging quality good
Boat diesel engine cylinder head forging method.
The technical solution adopted for the present invention to solve the technical problems is：The forging method of boat diesel engine cylinder head, bag
Include following steps：
A, utilize first forging mould carry out just forge：
The just forging mould includes just forging drift and the lower mould of just forging, and the maximum gauge of the just forging drift is less than or equal to gas
The diameter of cylinder cap centre bore；The lower mould of just forging is provided with just forging shaped vias, and the diameter of the just forging shaped vias is less than gas
The external diameter of cylinder cap body；
A1：In the first forging shaped vias that the blank of cylinder is put into the lower mould of just forging vertically, and it is fixed on the lower mould of just forging
The upper end of blank, applies pressure straight down to blank upper end, flange is formed in the lower end of blank；
A2：Recycle and just forge drift to the vertical punching of blank progress, obtain the middle base with central through hole and flange；
B, utilize finish-forging die carry out finish-forging：
The finish-forging die includes mould under mould under finish-forging drift and finish-forging, the finish-forging and is provided with finish-forging shaped vias, institute
The diameter for stating finish-forging shaped vias is more than or equal to the external diameter of cylinder head body；The finish-forging drift includes integrally formed be oriented to
Head and forming section, the shapes and sizes of the forming section are consistent with the shapes and sizes of combustion chamber, and the maximum of the guide head is straight
Footpath is less than or equal to the diameter of just forging drift；
Middle base is placed vertically, and small end is upwards, by finish-forging lower die-sleeve in the outer surface of middle base small end, and makes finish-forging
Lower mould lower surface is in contact with flange, then the guiding head erect of finish-forging drift is put into central through hole, and finish-forging drift is applied
Base in the middle of downward pressure, forming section extruding, shapes combustion chamber.
Further, the just forging shaped vias is inclined hole and just the maximum gauge of forging shaped vias is less than cylinder head body
External diameter.
Further, the just forging drift is conventional punch, in step A2, and it is vertical that blank is carried out using conventional punch
Punching.
The beneficial effects of the invention are as follows：One, carry out just forging using special mould, forged using metallic radial deformation
Shaping, it is low to press apparatus loading demands；Two, the forging of shaping is identical with part shape, and each position allowance is small, completely real
It is now near to form shape, improve stock utilization；Three, allowance is small, shortens the manufacturing cycle, and combustion chamber is forged completely, property
It can be increased without machining sequence before heat treatment, also shorten the manufacturing cycle；Four, nearly formation shape is realized, each position quality is obtained
Ensure, especially the surface quality of combustion chamber inner chamber.
Brief description of the drawings
Fig. 1 is the sectional view of spot ship cylinder cover for diesel engine；
Fig. 2 is finish-forging drift schematic diagram of the present invention；
Fig. 3 is the lower mould schematic diagram of forging at the beginning of the present invention；
Fig. 4 is mould schematic diagram under finish-forging of the present invention；
Fig. 5 is the first forging schematic diagram of boat diesel engine cylinder head of the present invention；
The middle base schematic diagram that forging at the beginning of Fig. 6 is the present invention is obtained；
Fig. 7 is the finish-forging schematic diagram of boat diesel engine cylinder head of the present invention；
1-just forge drift；The lower mould of 2-just forging；3-finish-forging drift；Mould under 4-finish-forging；11-flange；12-body；
13-centre bore；14-combustion chamber；15-central through hole；21-just forge shaped vias；31-guide head；32-forming section；
41-finish-forging shaped vias.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Figures 2 to 7, the forging method of boat diesel engine cylinder head, it is characterised in that comprise the following steps：
A, utilize first forging mould carry out just forge：
The just forging mould includes just forging drift 1 and the lower mould 2 of just forging, and the maximum gauge of the just forging drift 1 is less than or waited
In the diameter of cylinder head centre bore 13；The lower mould 2 of just forging is provided with just forging shaped vias 21, the just forging shaped vias 21
Diameter is less than the external diameter of cylinder head body 12；
A1：In the first forging shaped vias 21 that the blank of cylinder is put into the lower mould 2 of just forging vertically, and consolidate the lower mould 2 of just forging
The upper end of blank is scheduled on, applies pressure straight down to blank upper end, flange 11 is formed in the lower end of blank；
A2：Recycle and just forge drift 1 to the vertical punching of blank progress, obtain the centre with central through hole 15 and flange 11
Base；
B, utilize finish-forging die carry out finish-forging：
The finish-forging die includes mould 4 under mould 4 under finish-forging drift 3 and finish-forging, the finish-forging and is provided with finish-forging shaped vias
41, the diameter of the finish-forging shaped vias 41 is more than or equal to the external diameter of cylinder head body 12；The finish-forging drift 3 includes one
The guide head 31 and forming section 32 of shaping, the shapes and sizes of the forming section 32 are consistent with the shapes and sizes of combustion chamber 14,
The maximum gauge of the guide head 31 is less than or equal to the diameter of just forging drift 1；
Middle base is placed vertically, and small end is upwards, mould under finish-forging 4 is enclosed on to the outer surface of middle base small end, and make end
The lower lower surface of mould 4 of forging is in contact with flange 11, then the guide head 31 of finish-forging drift 3 is put into central through hole 15 vertically, to end
Forging drift 3 applies downward pressure, and forming section 32 extrudes middle base, shapes combustion chamber 14.
Just forging drift 1 is mainly used in rushing central through hole 15, and its maximum gauge is less than or equal to the straight of cylinder head centre bore 13
Footpath, is easy to the progress of finish-forging, prevents that machining allowance is larger after finish-forging.Just the maximum gauge of forging shaped vias 21 is less than cylinder head
The finished product external diameter of body 12, the diameter of finish-forging shaped vias 41 is more than or equal to the finished product external diameter of cylinder head body 12, makes finish-forging
Lower mould 4 can be enclosed on the outer surface of middle base, while not staying machining dimension or reserving a small amount of machining dimension.Guide head 31
Maximum gauge be less than or equal to just forging drift 1 diameter, enable guide head 31 unanimously be in central through hole 15 in, rise be oriented to
Effect, is conducive to the shaping of combustion chamber 14；The shapes and sizes of forming section 32 are consistent with the shapes and sizes of combustion chamber 14, directly
Combustion chamber 14 is forged to final size, machining amount is reduced, shortens production process and cycle.Just during forging, the lower mould 2 of just forging
Upper surface is flushed with the upper surface of blank, and blank compression is thicker, the full just forging shaped vias 21 of top filling, and bottom is just forged down
The lower surface of mould 2 and the pressure of forging machine, thicker formation flange 11.During finish-forging, flange 11 is fixed, mould under finish-forging 4 is enclosed on centre
The outer surface of base, and the center line of mould 4 under finish-forging is overlapped with the center line of middle base, mould 4 under finish-forging are supported by flange 11,
Recycle and carry out the progress punching press of finish-forging drift 3.The present invention realizes the complete profiling forging of cylinder head, special using special punch and two
Carry out middle base base and forging forming respectively with lower mould, design special middle base shape so that middle base small end and finish-forging
There is certain gap between lower mould 4, during the impact extrusion of finish-forging drift 3, on the one hand, metal only has Radial Flow, it is to avoid anti-
Extruding, on the other hand, the discharge volume of the impact extrusion of finish-forging drift 3 are equal to the interstitial volume under middle base and finish-forging between mould 4, middle
Base can fill mould just, realize the retinue forging of combustion chamber 14.Stock utilization greatly improved, internal soundness is improved,
Shorten the manufacturing cycle.
Just forging shaped vias 21 can be straight hole, now, and the diameter of blank should be consistent with just forging shaped vias 21, makes just
The lower mould 2 of forging can be relied on is frictionally held in blank upper end between blank.It is preferred that, the just forging shaped vias 21 is oblique
External diameter of the maximum gauge less than cylinder head body 12 of hole and just forging shaped vias 21.Just forging shaped vias 21 is inclined hole, blank
Diameter should be slightly less than or equal to the minimum diameter of first forging shaped vias 21, be easy to during forging the lower mould 2 of just forging being fixed on blank
Upper end, make blank when being pressurized thicker, just the lower mould 2 of forging is moved down as blank shortens, it is ensured that the shaping of flange 11.
In order to cost-effective, the just forging drift 1 is conventional punch, and in step A2, blank is entered using conventional punch
The vertical punching of row.Conventional punch is general alloy steel material drift, is directly bought.
Claims (3)
1. the forging method of boat diesel engine cylinder head, it is characterised in that comprise the following steps：
A, utilize first forging mould carry out just forge：
The just forging mould includes just forging drift (1) and the just lower mould (2) of forging, the maximum gauge for just forging drift (1) be less than or
Equal to the diameter of cylinder head centre bore (13)；The lower mould (2) of just forging is provided with just forging shaped vias (21), described to be just swaged into shape
The diameter of through hole (21) is less than the external diameter of cylinder head body (12)；
A1：In the first forging shaped vias (21) that the blank of cylinder is put into the lower mould (2) of just forging vertically, and make the lower mould (2) of just forging
The upper end of blank is fixed on, applies pressure straight down to blank upper end, flange (11) is formed in the lower end of blank；
A2：Recycle and just forge drift (1) to the vertical punching of blank progress, obtain with central through hole (15) and flange (11)
Between base；
B, utilize finish-forging die carry out finish-forging：
The finish-forging die includes mould (4) under mould (4) under finish-forging drift (3) and finish-forging, the finish-forging and is provided with finish-forging shaping leading to
Hole (41), the diameter of the finish-forging shaped vias (41) is more than or equal to the external diameter of cylinder head body (12)；The finish-forging drift
(3) integrally formed guide head (31) and forming section (32), the shapes and sizes of the forming section (32) and combustion chamber are included
(14) shapes and sizes are consistent, and the maximum gauge of the guide head (31) is less than or equal to the diameter of just forging drift (1)；
Middle base is placed vertically, and small end is upwards, mould under finish-forging (4) is enclosed on to the outer surface of middle base small end, and make finish-forging
Lower mould (4) lower surface is in contact with flange (11), then the guide head (31) of finish-forging drift (3) is put into central through hole (15) vertically
In, apply base in the middle of downward pressure, forming section (32) extruding to finish-forging drift (3), shape combustion chamber (14).
2. the forging method of boat diesel engine cylinder head as claimed in claim 1, it is characterised in that：The just forging shaped vias
(21) it is inclined hole and just the maximum gauge of forging shaped vias (21) is less than the external diameter of cylinder head body (12).
3. the forging method of boat diesel engine cylinder head as claimed in claim 1 or 2, it is characterised in that：The just forging drift
(1) it is conventional punch, in step A2, vertical punching is carried out to blank using conventional punch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801599.3A CN105478651B (en) | 2015-11-19 | 2015-11-19 | The forging method of boat diesel engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801599.3A CN105478651B (en) | 2015-11-19 | 2015-11-19 | The forging method of boat diesel engine cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105478651A CN105478651A (en) | 2016-04-13 |
| CN105478651B true CN105478651B (en) | 2017-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510801599.3A Active CN105478651B (en) | 2015-11-19 | 2015-11-19 | The forging method of boat diesel engine cylinder head |
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| CN (1) | CN105478651B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317592B (en) * | 2018-11-22 | 2023-06-23 | 上海精智实业股份有限公司 | Forging forming device and forming method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201511758U (en) * | 2009-09-09 | 2010-06-23 | 久钰车料(昆山)有限公司 | Hub and special mold for manufacturing the same |
| CN202377464U (en) * | 2011-12-27 | 2012-08-15 | 武钢集团昆明钢铁股份有限公司 | Steel reinforcement connecting sleeve forging forming device |
| CN203679139U (en) * | 2014-01-09 | 2014-07-02 | 莘县润达轴承有限公司 | Die for forging reverse punched hole |
| CN104826919A (en) * | 2015-05-25 | 2015-08-12 | 无锡市派克重型铸锻有限公司 | Punching method and punch structure used for aluminum alloy forged piece |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011025312A (en) * | 2009-06-30 | 2011-02-10 | Sakamura Hot Art Co Ltd | Method and apparatus for manufacturing inner and outer ring |
-
2015
- 2015-11-19 CN CN201510801599.3A patent/CN105478651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201511758U (en) * | 2009-09-09 | 2010-06-23 | 久钰车料(昆山)有限公司 | Hub and special mold for manufacturing the same |
| CN202377464U (en) * | 2011-12-27 | 2012-08-15 | 武钢集团昆明钢铁股份有限公司 | Steel reinforcement connecting sleeve forging forming device |
| CN203679139U (en) * | 2014-01-09 | 2014-07-02 | 莘县润达轴承有限公司 | Die for forging reverse punched hole |
| CN104826919A (en) * | 2015-05-25 | 2015-08-12 | 无锡市派克重型铸锻有限公司 | Punching method and punch structure used for aluminum alloy forged piece |
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| Publication number | Publication date |
|---|---|
| CN105478651A (en) | 2016-04-13 |
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Effective date of registration: 20180315 Address after: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee after: Double (Deyang) heavy equipment Co., Ltd. Address before: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee before: Erzhong Group (Deyang) Heavy Equipment Co., Ltd. |
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