CN105328111A - Die forging technology adopting free forging press for low-speed diesel engine cylinder heads - Google Patents
Die forging technology adopting free forging press for low-speed diesel engine cylinder heads Download PDFInfo
- Publication number
- CN105328111A CN105328111A CN201510772200.3A CN201510772200A CN105328111A CN 105328111 A CN105328111 A CN 105328111A CN 201510772200 A CN201510772200 A CN 201510772200A CN 105328111 A CN105328111 A CN 105328111A
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- China
- Prior art keywords
- forging
- finish
- die
- blocking
- demoulding
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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
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- 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
- B21J5/022—Open die 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 invention discloses a die forging technology adopting a free forging press for low-speed diesel engine cylinder heads. Steel ingots are upset, punched, chambered and drawn and then undergo head cutting and tail removing to be divided into separate blanks needed by the cylinder heads; a pre-forging die and a finish forging die are prepared, four pre-forging releasing ejection holes are uniformly formed in the bottom of the pre-forging die, four finish-forging releasing ejection holes are uniformly formed in the bottom of the finish forging die, and a pre-forging releasing ejection plate is arranged on the bottom of the pre-forging die. The interior and the exterior of a pre-forging die cavity have reverse taper, a finish forging die cavity is shaped like a simplified cylinder head contour, and machining allowance is reserved. The cylindrical blanks fully insulated are placed into the pre-forging die cavity and are pre-forged in the free forging press, and according to the shape characteristics of the cylinder heads, the cylindrical blanks are machined to form pre-forging material with the upper end walls thickened and the lower end walls thinned; the pre-forging material is placed into the finish forging die cavity for finally forming the low-speed diesel engine cylinder heads. The die forging technology has the advantages that blank manufacturing is easy, the operation is convenient, the procedure work is convenient, the machining allowance is small, the size accuracy is high, the production cost is low and the production efficiency is high, and is suitable for die forging of the low-speed diesel engine cylinder heads of various types.
Description
Technical field
The present invention relates to a kind of technique for open die forging press die forging cylinder cover of low-speed diesel.
Background technology
Cylinder cover of low-speed diesel is the key components and parts on the engine of high thrust, high pulling torque output, operating mode is severe, stressed complexity, and forge weight is large (for G80, forging is 8t heavily about), on open die forging press, usually adopt loose tooling forging mode to be shaped.Adopt traditional swage forging mode to produce, route is: steel ingot pulls out, is cutting into cylindrical blank, enters fetal membrane shaping outline, rushes endoporus, and the method machining allowance is large, punching centering is wayward, plastic force is large.
Summary of the invention
The object of the invention is for above-mentioned present situation, provide one and can reduce forging machining allowance, reduce base difficulty, reduce forming pressure, the technique for open die forging press die forging cylinder cover of low-speed diesel of enhancing productivity.
The implementation method of the object of the invention is, for the technique of open die forging press die forging cylinder cover of low-speed diesel, concrete steps are as follows:
1) punching after No-head Ingot jumping-up, uses hollow punch punching, washes out center material, obtains punching part;
2) punching part pulling core bar drawing is become cylindrical blank, cylindrical blank external diameter is 75% ± 5mm of cylinder head forging flange outer diameter, and internal diameter is 90% ± 5mm of cylinder head forging diameter of bore; Length should by 1.05 of cylinder head forge weight times;
3) prepare Preform Die, bottom Preform Die, uniform four blocking demouldings eject hole, and four blocking demoulding blocking mold cavity bottoms ejected on hole place blocking demoulding liftout plate; Described blocking die cavity is inside and outside reverse taper, and inside and outside tapering is 7 °;
4) blocking demoulding blocking demoulding liftout plate being positioned over Preform Die ejects the blocking mold cavity bottoms on hole, and cylindrical blank 4 is pressed into blocking die cavity, under open die forging press, carry out blocking, cylindrical shape blank upper end wall is thickened, the blocking material that lower end wall is thinning is;
5) then Preform Die is overturn 180 °, be placed on drain cap, guarantee that pre-forging is unsettled, eject in hole in the blocking demoulding and put into demoulding push rod, apply external force, auxiliary pre-forging demoulding; Sling, overturn, forge blocking part in advance;
6) prepare finish-forging die, bottom finish-forging die, uniform four finish-forging demouldings eject hole, and four finish-forging demoulding finish-forging mold cavity bottoms ejected on hole place finish-forging demoulding liftout plate; Described finish-forging die die cavity shape as the cylinder head profile simplified, and leaves machining allowance;
7) finish-forging demoulding finish-forging demoulding liftout plate being positioned over finish-forging die ejects the blocking mold cavity bottoms on hole, and pre-forging press-in finish-forging die cavity completes finish-forging;
8) finish-forging die is overturn 180 °, be placed on drain cap, guarantee that finish-forging part is unsettled, eject in hole in the finish-forging demoulding and put into demoulding push rod, apply external force, auxiliary whole forging demoulding; Sling, overturn, finish-forging goes out cylinder cover of low-speed diesel.
The present invention, compared with traditional loose tooling forging method, has the following advantages:
(1) before blocking, blank is hollow cylinder blank, is by steel ingot jumping-up, punching, pulling and obtaining, eliminates steel ingot heart portion material, therefore can adopt the No-head Ingot that mouth of a river end feeding is not good during punching, reduce the cost of raw material;
(2) mould cavity has inwall, accurately can ensure forging endoporus and outer wall concentricity, and therefore the machining allowance of forging can significantly reduce, and forge weight reduces, and reduces steel ingot consumption, decreases following process man-hour.
Base of the present invention is simple, easy to operate, be beneficial to procedure operation, and allowance is little, dimensional accuracy is high, and production cost is low, and production efficiency is high; Be applicable to the die forging of each type cylinder cover of low-speed diesel.
Accompanying drawing explanation
Fig. 1 is No-head Ingot structural representation,
Fig. 2 is steel ingot jumping-up punch structure schematic diagram,
Fig. 3 is Preform Die structural representation,
Fig. 4 is that blank enters the state diagram of Preform Die blocking,
Fig. 5 is the pre-forging structural representation of the blocking demoulding,
Fig. 6 is finish-forging die structural representation,
Fig. 7 is that blocking material enters the state diagram of finish-forging die finish-forging,
Fig. 8 is whole forging demoulding schematic diagram,
Fig. 9 is finish-forging part structural representation.
Detailed description of the invention
Concrete steps of the present invention are:
1) by punching after No-head Ingot 12 jumping-up shown in Fig. 1, use hollow punch punching, wash out center material, obtain the punching shown in Fig. 2 13;
2) punching part 13 pulling core bar drawing is become cylindrical blank, cylindrical blank external diameter is 75% ± 5mm of cylinder head forging flange outer diameter, and internal diameter is 90% ± 5mm of cylinder head forging diameter of bore; Length should by 1.05 of cylinder head forge weight times;
As adopted the No-head Ingot compared with large gauge, more than one piece connects forging, is divided into Len req to obtain single-piece after inside/outside diameter size puts in place;
3) prepare Preform Die, with reference to Fig. 3, bottom Preform Die 1, uniform four blocking demouldings eject 3, four, the hole blocking demoulding blocking mold cavity bottoms ejected on hole and place blocking demoulding liftout plate 2.Blocking die cavity is inside and outside reverse taper, and inside and outside tapering is 7 °;
4) with reference to Fig. 4, blocking demoulding blocking demoulding liftout plate 2 being positioned over Preform Die 1 ejects the blocking mold cavity bottoms on hole, and cylindrical blank 4 is pressed into blocking die cavity, under open die forging press, carry out blocking, cylindrical shape blank upper end wall is thickened, the blocking material that lower end wall is thinning is;
5) then Preform Die is overturn 180 °, be placed on drain cap, guarantee that pre-forging is unsettled, eject in hole in the blocking demoulding and put into demoulding push rod, apply external force, auxiliary pre-forging demoulding; Sling, overturn, forge pre-forging 5 as shown in Figure 5 in advance;
6) prepare finish-forging die, with reference to Fig. 6, bottom finish-forging die 6, uniform four finish-forging demouldings eject 8, four, the hole finish-forging demoulding finish-forging mold cavity bottoms ejected on hole and place finish-forging demoulding liftout plate 7.Described finish-forging die die cavity shape as the cylinder head profile simplified, and leaves machining allowance;
7) with reference to Fig. 7, finish-forging demoulding finish-forging demoulding liftout plate 7 being positioned over finish-forging die 6 ejects the blocking mold cavity bottoms on hole 8, and pre-forging 5 is pressed into finish-forging die cavity and completes finish-forging;
8) with reference to Fig. 8, finish-forging die is overturn 180 °, be placed on drain cap 10, guarantee that finish-forging part is unsettled, eject in hole 8 in the finish-forging demoulding and put into demoulding push rod 10, apply external force, auxiliary whole forging demoulding; Sling, overturn, finish-forging goes out cylinder cover of low-speed diesel 9 as shown in Figure 9.
Base of the present invention is simple, easy to operate, be beneficial to procedure operation, and allowance is little, dimensional accuracy is high, and production cost is low, and production efficiency is high; Be applicable to the die forging of each type cylinder cover of low-speed diesel.
Claims (1)
1., for the technique of open die forging press die forging cylinder cover of low-speed diesel, it is characterized in that: concrete steps are as follows:
1) punching after No-head Ingot jumping-up, uses hollow punch punching, washes out center material, obtains punching part;
2) punching part pulling core bar drawing is become cylindrical blank, cylindrical blank external diameter is 75% ± 5mm of cylinder head forging flange outer diameter, and internal diameter is 90% ± 5mm of cylinder head forging diameter of bore; Length should by 1.05 of cylinder head forge weight times;
3) prepare Preform Die, bottom Preform Die, uniform four blocking demouldings eject hole, and four blocking demoulding blocking mold cavity bottoms ejected on hole place blocking demoulding liftout plate; Described blocking die cavity is inside and outside reverse taper, and inside and outside tapering is 7 °;
4) blocking demoulding blocking demoulding liftout plate being positioned over Preform Die ejects the blocking mold cavity bottoms on hole, and cylindrical blank 4 is pressed into blocking die cavity, under open die forging press, carry out blocking, cylindrical shape blank upper end wall is thickened, the blocking material that lower end wall is thinning is;
5) then Preform Die is overturn 180 °, be placed on drain cap, guarantee that pre-forging is unsettled, eject in hole in the blocking demoulding and put into demoulding push rod, apply external force, auxiliary pre-forging demoulding; Sling, overturn, forge blocking part in advance;
6) prepare finish-forging die, bottom finish-forging die, uniform four finish-forging demouldings eject hole, and four finish-forging demoulding finish-forging mold cavity bottoms ejected on hole place finish-forging demoulding liftout plate; Described finish-forging die die cavity shape as the cylinder head profile simplified, and leaves machining allowance;
7) finish-forging demoulding finish-forging demoulding liftout plate being positioned over finish-forging die ejects the blocking mold cavity bottoms on hole, and pre-forging press-in finish-forging die cavity completes finish-forging;
8) finish-forging die is overturn 180 °, be placed on drain cap, guarantee that finish-forging part is unsettled, eject in hole in the finish-forging demoulding and put into demoulding push rod, apply external force, auxiliary whole forging demoulding; Sling, overturn, finish-forging goes out cylinder cover of low-speed diesel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772200.3A CN105328111B (en) | 2015-11-12 | 2015-11-12 | Die forging technology adopting free forging press for low-speed diesel engine cylinder heads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772200.3A CN105328111B (en) | 2015-11-12 | 2015-11-12 | Die forging technology adopting free forging press for low-speed diesel engine cylinder heads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105328111A true CN105328111A (en) | 2016-02-17 |
| CN105328111B CN105328111B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510772200.3A Active CN105328111B (en) | 2015-11-12 | 2015-11-12 | Die forging technology adopting free forging press for low-speed diesel engine cylinder heads |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759981A (en) * | 2005-11-11 | 2006-04-19 | 武汉重工铸锻有限责任公司 | Technique for manufacturing cylinder cover of diesel engine in use for forging stele ingot without casting head |
| CN102319855A (en) * | 2011-08-27 | 2012-01-18 | 江阴振宏重型锻造有限公司 | Method for forging thick-walled ring-shaped parts |
| DE102010037123A1 (en) * | 2010-08-23 | 2012-02-23 | Leiber Group Gmbh & Co. Kg Aluminium Umform- Und Bearbeitungstechnik | Braking system i.e. brake disk, for motor vehicle, has cylinder provided with brake disk head, and friction ring forged at brake disk head after insertion of cylinder into head, where cylinder is forged at brake disk head |
| CN102398146A (en) * | 2010-09-10 | 2012-04-04 | 江苏威鹰机械有限公司 | Pick shoe forging process |
| CN103008521A (en) * | 2012-10-22 | 2013-04-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming die for conic forgings and forming method thereof |
| CN103551476A (en) * | 2013-11-05 | 2014-02-05 | 洛阳双瑞特种装备有限公司 | Technology and die for uniformly molding corrosion-resistant alloy flange through forging |
-
2015
- 2015-11-12 CN CN201510772200.3A patent/CN105328111B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759981A (en) * | 2005-11-11 | 2006-04-19 | 武汉重工铸锻有限责任公司 | Technique for manufacturing cylinder cover of diesel engine in use for forging stele ingot without casting head |
| DE102010037123A1 (en) * | 2010-08-23 | 2012-02-23 | Leiber Group Gmbh & Co. Kg Aluminium Umform- Und Bearbeitungstechnik | Braking system i.e. brake disk, for motor vehicle, has cylinder provided with brake disk head, and friction ring forged at brake disk head after insertion of cylinder into head, where cylinder is forged at brake disk head |
| CN102398146A (en) * | 2010-09-10 | 2012-04-04 | 江苏威鹰机械有限公司 | Pick shoe forging process |
| CN102319855A (en) * | 2011-08-27 | 2012-01-18 | 江阴振宏重型锻造有限公司 | Method for forging thick-walled ring-shaped parts |
| CN103008521A (en) * | 2012-10-22 | 2013-04-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Forming die for conic forgings and forming method thereof |
| CN103551476A (en) * | 2013-11-05 | 2014-02-05 | 洛阳双瑞特种装备有限公司 | Technology and die for uniformly molding corrosion-resistant alloy flange through forging |
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| Publication number | Publication date |
|---|---|
| CN105328111B (en) | 2017-05-24 |
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