CN107138673A - A kind of cold-extruded pressurized overflow forming technology of oil pump cover plate - Google Patents
A kind of cold-extruded pressurized overflow forming technology of oil pump cover plate Download PDFInfo
- Publication number
- CN107138673A CN107138673A CN201710516921.7A CN201710516921A CN107138673A CN 107138673 A CN107138673 A CN 107138673A CN 201710516921 A CN201710516921 A CN 201710516921A CN 107138673 A CN107138673 A CN 107138673A
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- CN
- China
- Prior art keywords
- cover plate
- oil pump
- pump cover
- mould
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
-
- 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
- B21J5/025—Closed die forging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of cold-extruded pressurized overflow forming technology of oil pump cover plate, including step：1) blanking, annealing, ball blast and surface lubrication processing are carried out successively to blank；2) blank is put into mould, cold extrusion, overflow one step forming, produce one side has the oil pump cover plate forging of overlap with helical oil groove, another side with deep groove and periphery.The mould of use includes：Upper mould, upper mould includes being circumferentially with overflow launder on drift, the outer wall of nose of punch；Lower mould, lower mould includes the outer ring, inner ring, outer core rod and the inner mould core that are interference fitted successively, and inner mould core includes internal model core print seat and several are embedded in the mold insert of internal model core print seat；Ejector beam, ejector beam is interference fitted with internal model core print seat, for ejecting the oil pump cover plate forging after shaping；Wherein, upper mould is with after lower mould matched moulds, being formed with the die cavity matched with oil pump cover plate.The present invention realizes a step cold-extrusion shaping using split type mould, while coordinating overflow shaping, increases substantially die life.
Description
Technical field
The present invention relates to cold-forging precise forming technical field, it is related to a kind of cold-extrusion technology, more particularly to a kind of oil pump cover
The cold-extruded pressurized overflow forming technology of plate.
Background technology
Oil pump cover plate is a kind of common engine fittings, sufficient fuel is provided when predominantly engine works, to hard
Degree, intensity have very high requirement.Because the profile of oil pump cover plate and inner chamber are all different form, forming technology is more complicated.Tradition
Monolithic mold life-span and its unstable, (can only be repeatedly molded after blocking distribution material) by the way of multiple base,
Although having delayed the initial failure of mould, the intermediate treatment expense of costliness is generated, such as：Intermediate softening after being repeatedly molded
Processing and lubricated.In addition, complicated process causes, the production cycle is longer, process monitoring is more, take substantial amounts of manpower
Material resources, management and its inconvenience.
In view of above-mentioned defect, the design people is actively subject to research and innovation, to found a kind of cold-extruded of oil pump cover plate
Pressurized overflow forming technology, makes it skip middle preforming operation, and manufacturing cycle, reduction management cost is greatly shortened, has more
Value in industry.
The content of the invention
It is an object of the invention to propose a kind of cold-extruded pressurized overflow forming technology of oil pump cover plate, a step cold extrusion can be achieved
Shaping, process is simple, eliminates the softening lubricated of centre, and the manufacturing cycle is greatly shortened, and convenient management is easily realized automatic
Metaplasia is produced, and substantially reduces cost.
For up to this purpose, the present invention uses following technical scheme：
A kind of cold-extruded pressurized overflow forming technology of oil pump cover plate, including step：
1) blanking, annealing, ball blast and surface lubrication processing are carried out successively to blank；
2) blank is put into matched moulds in mould, cold extrusion, overflow one step forming produce one side with spiral oil
Groove, another side have the oil pump cover plate forging of overlap with deep groove and periphery.
Further, the step 1) in annealing use spheroidizing, be specially：
When being made annealing treatment, temperature is heated to 380-400 DEG C, is incubated 5-6h, is then down to after 250 DEG C and is incubated with stove
4-5h, sky of coming out of the stove afterwards is cooled to room temperature.
Further, the step 1) in surface lubrication processing table is carried out using zinc stearate or polymeric lubricant
Face lubricated.
Further, the blank is aluminium alloy.
Further, the overlap of the oil pump cover plate forging is 3mm relative to the height of the oil pump cover plate forging.
Further, the mould includes：
Upper mould, the upper mould includes being circumferentially with overflow launder on drift, the outer wall of the nose of punch；
Lower mould, the lower mould includes outer ring, inner ring, outer core rod and the inner mould core that ecto-entad is interference fitted successively, described
Inner mould core includes internal model core print seat and several are embedded in the mold insert of the internal model core print seat；And
Ejector beam, the ejector beam is interference fitted through the internal model core print seat and with the internal model core print seat, for ejecting into
The oil pump cover plate forging after shape；
Wherein, the upper mould is with after the lower mould matched moulds, being formed with the die cavity matched with the oil pump cover plate.
Further, the outer core rod has a through hole being interference fitted with the inner mould core, one end of the through hole be into
Material mouth, the feeding mouth is in bell mouth shape wide at the top and narrow at the bottom, is cambered surface between the feeding mouth and the remainder of the through hole
Transition.
Further, the internal model core print seat interference fit has three ejector beams.
Further, the height of the overflow launder is 3mm.
Further, the step 2) in, the upper mould is fixed on press upper bolster first, the lower mould is fixed on
On press die shoe, the blank is put between the upper mould and the lower mould；Then the upper bolster drives the upper mould
Move downward, the upper mould first contacts the blank, run downwards and start shaping, continue to be pressed into a segment distance, until completely
Shaping；Press backhaul after the completion of pressing action, ejector beam ejection one side with helical oil groove, another side with deep groove and
Periphery has the oil pump cover plate forging of overlap.
Beneficial effects of the present invention are：
1st, the technique is shaped using a step cold-extruded pressurized overflow, reaches once-forming effect, and forging precision is high, process letter
It is single, the softening lubricated of centre is eliminated, the manufacturing cycle is greatly shortened, and production process is simple, convenient management, easily realizes
Automated production, substantially reduces cost；
2nd, the technique subsequently can directly do T6 heat treatments, without other intermediate treatment links, and product quality is stable, production effect
Rate is high；
3rd, optimize metal flow by the way of overflow shapes in shaping, reduce forming force, meanwhile, overflow launder can be big
Amplitude improves die life；
4th, due to the presence of overflow launder, also relax significantly for the weight demands of blank.
Brief description of the drawings
Fig. 1 is the process charts of the cold-extruded pressurized overflow forming technology for the oil pump cover plate that the specific embodiment of the invention is provided；
Fig. 2 is the mould that uses of cold-extruded pressurized overflow forming technology for the oil pump cover plate that the specific embodiment of the invention is provided
Structural representation；
Fig. 3 is the structural representation of the oil pump cover plate forging after the forming technology shaping using the present invention；
Fig. 4 is the structural representation of the upper mould of mould；
Fig. 5 is the structure sectional view of the lower mould of mould；
Fig. 6 is the structure sectional view of lower mould China and foreign countries core rod；
Fig. 7 is the dimensional structure diagram of inner mould core partial cut in lower mould.
In figure：The upper moulds of 10-, 11- overflow launders, 21- outer rings, 22- inner rings, the outer core rods of 23-, 24- inner mould cores, 25- inner mould cores
Seat, 26- mold inserts, 27- through holes, 28- feeding mouths, 29- cambered surfaces, 30- ejector beams, 40- forging, 41- overlaps, 50- fixing holes.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Oil pump cover plate positive and negative of the present invention is abnormity, and wherein front has the asymmetrical oil groove of two circles, reverse side to have
Special-shaped deep trouth, and special-shaped deep trouth depth exceedes front.
As shown in figure 1, the cold-extruded pressurized overflow forming technology of the oil pump cover plate of the present invention, first step S1, under being carried out to blank
Material；Second step S2, is pre-processed to blank, and pretreatment includes annealing, ball blast and surface lubrication processing；3rd step S3, by base
Material is put into matched moulds in Fig. 2 mould, cold extrusion, overflow one step forming, produce one side with the two asymmetrical helical oil grooves of circle,
Another side has the oil pump cover plate forging 40 of overlap with deep groove and periphery.Oil pump cover plate forging after shaping as shown in figure 3,
The overlap 41 of oil pump cover plate forging relative to oil pump cover plate forging height be 3mm, overlap 41 can be effectively improved blank into
The flowing of shape, drastically reduce the area shaping load, improve die life；Weight control during blanking is significantly relaxed simultaneously.
Specifically, the blank of the oil pump cover plate of the present invention is 6028 aluminium alloys, using spheroidizing, made annealing treatment
Shi Wendu is heated to 380-400 DEG C, is incubated 5-6h, is then down to stove after 250 DEG C and is incubated 4-5h, sky of coming out of the stove afterwards is cooled to room
Temperature；Then conventional Shot Blasting is carried out；Surface lubrication processing is finally carried out using zinc stearate or polymeric lubricant.
It can be seen that, technique of the invention is shaped using a step cold-extruded pressurized overflow, reaches once-forming effect, forging precision
Height, process is simple, eliminates the softening lubricated of centre, and the manufacturing cycle is greatly shortened, and production process is simple, convenient pipe
Reason, easily realizes automated production, substantially reduces cost；The technique subsequently can directly do T6 heat treatments, without other intermediate treatments
Link, product quality is stable, and production efficiency is high.
The mould of cold-extruded pressurized overflow shaping is carried out to blank as shown in Fig. 2 and Fig. 4-7, mould includes：Upper mould 10, upper mould 10
Including drift, overflow launder 11 is circumferentially with the outer wall of nose of punch；Lower mould, lower mould includes what ecto-entad was interference fitted successively
Outer ring 21, inner ring 22, outer core rod 23 and inner mould core 24, inner mould core 24 includes internal model core print seat 25 and several are embedded in inner mould core
The mold insert 26 of seat；And ejector beam 30, ejector beam 30 is interference fitted through internal model core print seat 25 with internal model core print seat 25, for ejecting into
Oil pump cover plate forging 40 after shape；Wherein, after upper mould is combined with lower mould, it is formed with the die cavity for shaping oil pump cover plate.
Specifically, outer core rod 23 has the through hole 27 being interference fitted with inner mould core 24, one end of through hole 27 is feeding mouth 28,
Feeding mouth 28 is in bell mouth shape wide at the top and narrow at the bottom, is the transition of cambered surface 29 between feeding mouth 28 and the remainder of through hole 27.It will enter
Material mouth 28 is set to bell mouth shape wide at the top and narrow at the bottom, when drift is pushing blank, can make blank much smoother from feeding mouth
28 enter in through hole 27 of the feeding mouth below 28, and due to being the mistake of cambered surface 29 between the remainder of feeding mouth and 28 through holes 27
Cross, the frictional force that blank enters through hole 27 can be greatly reduced.
In order to smoothly eject oil pump cover plate forging, the interference fit of internal model core print seat 25 of the invention has three ejector beams
30, oil pump cover plate forging is ejected simultaneously from three points using three ejector beams；In addition, ejector beam 30 and inner mould core 24 use small mistake
The mode being full of, can effectively prevent from boring and expect.
Periphery overflow during for cold extrusion in oil pump cover plate forging 40 goes out 3mm overlap 41, by the height of overflow launder 11
It is also configured as 3mm.
For the ease of mould installion on press, to be equipped with outer ring 21 and internal model core print seat 25 lower mould being fixed on pressure
Fixing hole 50 on machine.
When shaping oil pump cover plate forging using the mould cold-extruded pressurized overflow, upper mould 10 is fixed on press upper bolster, under
Mould is fixed on press die shoe.When extruding the oil pump cover plate forging, blank is put between mould 10 and lower mould, upper bolster band
Dynamic upper mould is moved downward, and upper mould first contacts blank, continues to run and start shaping downwards.Inaccessible shaping is avoided in forming process
Risk, unnecessary material can flow into overflow launder 11, due to the asymmetry of forging, and enough scope of freedoms also can be significantly
Optimize material flowing.It is pressed into after a segment distance, shaping is basically completed.Due to the presence of overflow launder 11, even if press has different journeys
The deviation of stroke of degree, can also substantially reduce the risk of mould fragmentation；Even if blank has different degrees of deviation of weight, it can also rely on
The presence of overflow launder 11, protects mould.Press backhaul after the completion of pressing action, three ejector beams 30 eject forging, due to overflow
There is sufficiently high overlap 41 at the presence of groove 11, the cylindrical place of forging 40, can easily realize automated handling, safely may be used
Lean on, whole forming process is to complete.
It is of the invention that there is advantages below compared with existing repeatedly prefabricated embryo technique：Using a step cold-extrusion shaping, process
Simply, the softening lubricated between station is eliminated, the manufacturing cycle is greatly shortened；The die life by the way of overflow is molded
Height, load is small, also relaxes significantly for the weight demands of blank, simple into production process, and automatic metaplasia is easily realized in convenient management
Production, cost is substantially reduced；Follow-up directly to do T6 heat treatments, product quality is stable, and production efficiency is high.
The Split type die (mainly descending mould to be split type) of the present invention compares traditional monolithic mold, and intensity is high, the longevity
Life length, can make oil pump cover plate forging once-forming, skip middle preforming operation, and manufacturing cycle, reduction pipe is greatly shortened
Manage cost.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel, which would not require any inventive effort, can associate other embodiments of the present invention, and these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. the cold-extruded pressurized overflow forming technology of a kind of oil pump cover plate, it is characterised in that including step：
1) blanking, annealing, ball blast and surface lubrication processing are carried out successively to blank；
2) blank is put into mould, cold extrusion, overflow one step forming, produces one side and carry helical oil groove, another side
There is the oil pump cover plate forging of overlap with deep groove and periphery.
2. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 1, it is characterised in that the step 1) in
Annealing use spheroidizing, be specially：
When being made annealing treatment, temperature is heated to 380-400 DEG C, is incubated 5-6h, 4-5h is incubated after being then down to 250 DEG C with stove,
Sky of coming out of the stove afterwards is cooled to room temperature.
3. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 1, it is characterised in that the step 1) in
Surface lubrication processing surface lubrication processing is carried out using zinc stearate or polymeric lubricant.
4. the cold-extruded pressurized overflow forming technology of the oil pump cover plate according to claim any one of 1-3, it is characterised in that described
Blank is aluminium alloy.
5. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 1, it is characterised in that the oil pump cover plate
The overlap of forging is 3mm relative to the height of the oil pump cover plate forging.
6. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 1, it is characterised in that the mould bag
Include：
Upper mould, the upper mould includes being circumferentially with overflow launder on drift, the outer wall of the nose of punch；
Lower mould, the lower mould includes outer ring, inner ring, outer core rod and the inner mould core that ecto-entad is interference fitted successively, the internal model
Core includes internal model core print seat and several are embedded in the mold insert of the internal model core print seat；And
Ejector beam, the ejector beam is interference fitted through the internal model core print seat and with the internal model core print seat, for ejecting after shaping
The oil pump cover plate forging；
Wherein, the upper mould is with after the lower mould matched moulds, being formed with the die cavity for shaping the oil pump cover plate.
7. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 6, it is characterised in that the outer core rod tool
There is the through hole being interference fitted with the inner mould core, one end of the through hole is feeding mouth, and the feeding mouth is in loudspeaker wide at the top and narrow at the bottom
It is cambered surface transition between the remainder of mouth shape, the feeding mouth and the through hole.
8. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 6, it is characterised in that the internal model core print seat
Interference fit has three ejector beams.
9. the cold-extruded pressurized overflow forming technology of oil pump cover plate according to claim 6, it is characterised in that the overflow launder
Highly it is 3mm.
10. the cold-extruded pressurized overflow forming technology of the oil pump cover plate according to claim any one of 6-9, it is characterised in that institute
State step 2) in, the upper mould is fixed on press upper bolster first, the lower mould is fixed on press die shoe, will be described
Blank is put between the upper mould and the lower mould；Then the upper bolster drives the upper mould to move downward, and the upper mould is first
The blank is contacted, runs downwards and starts shaping, continue to be pressed into a segment distance, until being fully formed；After the completion of pressing action
Press backhaul, the ejector beam ejection one side is with helical oil groove, another side is with deep groove and periphery has the described of overlap
Oil pump cover plate forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516921.7A CN107138673B (en) | 2017-06-29 | 2017-06-29 | Cold extrusion overflow forming process of oil pump cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516921.7A CN107138673B (en) | 2017-06-29 | 2017-06-29 | Cold extrusion overflow forming process of oil pump cover plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107138673A true CN107138673A (en) | 2017-09-08 |
| CN107138673B CN107138673B (en) | 2020-04-28 |
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ID=59786146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710516921.7A Active CN107138673B (en) | 2017-06-29 | 2017-06-29 | Cold extrusion overflow forming process of oil pump cover plate |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006192450A (en) * | 2005-01-12 | 2006-07-27 | Mitsubishi Heavy Ind Ltd | Forging die for scroll, method for forging scroll and scroll |
| CN102179466A (en) * | 2011-01-21 | 2011-09-14 | 中南大学 | Precision isothermal forging combined die for complex aerospace die forged pieces |
| CN201969741U (en) * | 2010-12-10 | 2011-09-14 | 湖南天雁机械有限责任公司 | Valve blank die |
| CN104525816A (en) * | 2014-12-05 | 2015-04-22 | 万向钱潮传动轴有限公司 | Forging device and process for flange yoke of transmission shaft |
| CN206550148U (en) * | 2016-12-19 | 2017-10-13 | 江苏太平洋精锻科技股份有限公司 | End face has the gear ring cold forming die of tank structure |
-
2017
- 2017-06-29 CN CN201710516921.7A patent/CN107138673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006192450A (en) * | 2005-01-12 | 2006-07-27 | Mitsubishi Heavy Ind Ltd | Forging die for scroll, method for forging scroll and scroll |
| CN201969741U (en) * | 2010-12-10 | 2011-09-14 | 湖南天雁机械有限责任公司 | Valve blank die |
| CN102179466A (en) * | 2011-01-21 | 2011-09-14 | 中南大学 | Precision isothermal forging combined die for complex aerospace die forged pieces |
| CN104525816A (en) * | 2014-12-05 | 2015-04-22 | 万向钱潮传动轴有限公司 | Forging device and process for flange yoke of transmission shaft |
| CN206550148U (en) * | 2016-12-19 | 2017-10-13 | 江苏太平洋精锻科技股份有限公司 | End face has the gear ring cold forming die of tank structure |
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| Publication number | Publication date |
|---|---|
| CN107138673B (en) | 2020-04-28 |
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