CN109108235A - A kind of formative method and device for green sand molding - Google Patents
A kind of formative method and device for green sand molding Download PDFInfo
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- CN109108235A CN109108235A CN201810930291.2A CN201810930291A CN109108235A CN 109108235 A CN109108235 A CN 109108235A CN 201810930291 A CN201810930291 A CN 201810930291A CN 109108235 A CN109108235 A CN 109108235A
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- sand
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- compacting
- sandbox
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- 239000004576 sand Substances 0.000 title claims abstract description 106
- 238000000465 moulding Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 22
- 238000013022 venting Methods 0.000 claims abstract description 53
- 244000035744 Hura crepitans Species 0.000 claims abstract description 42
- 230000003068 static effect Effects 0.000 claims abstract description 35
- 238000005266 casting Methods 0.000 claims abstract description 34
- 238000009747 press moulding Methods 0.000 claims abstract description 28
- 238000007596 consolidation process Methods 0.000 claims abstract description 18
- 238000009416 shuttering Methods 0.000 claims abstract description 17
- 239000003110 molding sand Substances 0.000 claims description 26
- 238000009825 accumulation Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
A kind of vacuum static press moulding device casting green sand molding, including shuttering supporting case, it has been superposed template on the shuttering supporting case and has been fixed with sandbox, it is provided in the sandbox and adds sand frame, pressure head is provided on described plus sand frame, the bottom of the template is arranged with venting plug, the bottom of the template is fixedly connected with vacuum suction device by exhaust pipe, the output end of the vacuum suction device is provided with quck-opening valve, the following steps are included: plus sand, vacuum pinpoints pre- consolidation, the compacting of vacuum debulk, the present invention, not only realize the pre- compacting effect that traditional static press moulding has, and there is fixed point stop-off, pinpoint the effect of pre- consolidation, the problems such as solving traditional static press moulding air-flow rebound and die wear.
Description
Technical field
The present invention relates to wet type modeling technology area, specially a kind of formative method and device for green sand molding.
Background technique
Casting is that the mankind grasp than a kind of metal heat processing technique earlier, has history in about 6000.China about exists
B.C. 1700~it is 1000 first between entered heyday of bronze casting, have reached quite high level in technique.It is cast
Substance was mostly solid-state but the metal (example: copper, iron, aluminium, tin, lead etc.) for being heated to liquid originally, and the material of mold can be sand,
Metal even ceramics.Casting refers to the mold that the liquid of fusing is poured into specific shape, the processing side to its solidification forming
Formula.Casting core technique is moulding, that is, the method for forming mold (being also casting mold), and inside Modeling Technology, utilization is most wide
Be wet type moulding (or for clay sand molding), that is, the formative method of casting mold is manufactured using sand, clay etc..
Since this century, due to the development of car industry, wet type Modeling Technology is greatly improved.From common pressure
Real moulding, jarring formula moulding, develop to high pressure moulding, multiple contact moulding.The last century 80's, air-impact molding and injection molding
Fashionable for a time, then on the basis of air-impact molding, Japanese has invented static press moulding.Static press moulding became at that time in the world most
Advanced Modeling Technology, but pass through popularization and utilization in 30 years, many deficiencies of static press moulding are exposed, such as high pressure is empty
Loss is very big when gas passes through molding sand, and energy consumption is high；Pre- compacting effect is poor；It is larger to the abrasion of template；Simultaneously because template needs
A large amount of venting plug is installed, template cost is caused to greatly improve；Compressed air can generate air-flow rebound, influence mold quality etc.
Deng.
Summary of the invention
The purpose of the present invention is to provide a kind of formative methods and device for green sand molding, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme: a kind of vacuum static pressure for casting green sand molding is made
Type device, including shuttering supporting case have been superposed template on the shuttering supporting case and have been fixed with sandbox, set in the sandbox
It is equipped with and adds sand frame, pressure head is provided on described plus sand frame, the bottom of the template is arranged with venting plug, and the bottom of the template is logical
It crosses exhaust pipe and is fixedly connected with vacuum suction device, the output end of the vacuum suction device is provided with quck-opening valve.
Preferably, the pressure head is plate pressure head, profiling pressure head, multiple contact or rubber squeeze head.
Preferably, the diameter of the venting plug is greater than 5mm.
A kind of vacuum static press moulding method of casting green sand molding as described in claim 1, comprising the following steps:
S1: add sand: adding sand frame to be put into sandbox, then fill sand, vacuumized using vacuum suction device, allow molding sand to row
Vent plug flowing, and accumulation and consolidation near venting plug；
S2: vacuum pinpoints pre- consolidation: template and sandbox successively being overlayed and are fixed on shuttering supporting case, sand is added in template
The position of the needs such as difficult channel or draft difficulty, installs venting plug, and venting plug connects vacuum suction device by exhaust pipe；
S3: the compacting of vacuum debulk: while vacuumizing, compacting molding sand allows molding sand to be compacted under negative pressure state.
Preferably, being not less than -0.7, (air pressure is higher than the vacuum degree condition of high vacuum degree that vacuum suction fills in the S2 step
70000pa)。
Preferably, the vacuum degree in the sandbox in the S3 step cheek is not less than -0.3 (air pressure is lower than 70000pa).
Preferably, the compacting molding sand in the S3 step can be plate compacting, microseism compacting, multiple contact compacting or profiling pressure
It is real.
Compared with prior art, the beneficial effects of the present invention are: being originally used for the formative method and device of green sand molding: 1,
The case where mold quality is more preferable, especially fails to clear up venting plug in time in operator, and part or all of venting plug is caused to block
Under, traditional static press moulding causes recess molding sand under model loose, and fail to arrange in time since the air-flow of pressure-air rebounds
The pressure-air of gas fights subsequent compacting, and mold quality is caused even to be not so good as ordinary high pressure moulding.The present invention uses vacuum,
Air-flow rebound etc disadvantage is avoided, even if air-flow rebound will not be generated in the case where the blocking of whole venting plugs.Especially
Subsequent vacuum debulk is compacted molding sand under negative pressure state, without or only very little gas resist compacting, casting mold without or
Only the casting mold rebound of very little, casting mold precision greatly improve, and the casting mold degree of packing is also above ordinary high pressure moulding and static press moulding.
2, low energy consumption.Traditional static press moulding, compressed air act on entire casting mold, and gas needs are worn from the back side
Entire molding sand is crossed, model surface is got to.Therefore compressed air consumption is very big, and energy consumption is very high, causes most of to use static pressure
The Foundry Works of mo(u)lding line when producing most of common products, all closes static pressure even if spending the static pressure molding line of several ten million purchases
Function, to reduce cost.
3, template is at low cost, wears small.Since traditional static pressure line needs to exclude pressure-air in time, it is therefore desirable in mould
A large amount of venting plug is installed on plate, even up to up to a hundred sometimes, substantially increases the cost of template in this way.Additionally, due to compression
Air effect applies motive force from the back side to template surface straight line when starting on entire molding sand surface, drives molding sand entire
Template surface is mobile, generates a large amount of abrasions to template.Even if forming the windstream from the back side to venting plug in the later period, due to
The venting plug that it is installed is large number of, still generates a large amount of abrasions.Still template of the present invention only needs at the position needed individually
A small amount of venting plug is installed, in some instances it may even be possible to only one venting plug.The draft of vacuum also only influences local region.And vacuum
Draft since generate when, air-flow is exactly displacement (deduster of such as family), small to the abrasion of template.
Detailed description of the invention
Fig. 1 is traditional static press moulding schematic diagram；
Fig. 2 is that static press moulding schematic device is compacted in the present invention；
Fig. 3, which is that the present invention is lower, is compacted static press moulding schematic device；
Fig. 4 is the two-sided compacting static press moulding schematic device of the present invention.
In figure: 1 pressure head, 2 sandboxes, 3 plus sand frame, 4 templates, 5 venting plugs, 6 quck-opening valves, 7 vacuum suction devices, 8 template branch
Support case.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-4 is please referred to, the present invention provides a kind of technical solution:
Embodiment 1
A kind of vacuum static press moulding device casting green sand molding, including shuttering supporting case, on the shuttering supporting case
It has been superposed template and has been fixed with sandbox, be provided in the sandbox and add sand frame, be provided with pressure head on described plus sand frame, it is described
It is provided in template plus sand difficulty channel, described plus sand difficulty channel is located in sandbox, be arranged in described plus sand difficulty channel
Venting plug, described plus sand difficulty channel bottom are fixedly connected with vacuum suction device, the vacuum suction dress by exhaust pipe
The output end set is provided with quck-opening valve.
Its vacuum static press moulding method the following steps are included:
S1: add sand: adding sand frame to be put into sandbox, then fill sand, vacuumized using vacuum suction device, allow molding sand to row
Vent plug flowing, and accumulation and consolidation near venting plug；
S2: vacuum pinpoints pre- consolidation: template and sandbox successively being overlayed and are fixed on shuttering supporting case, sand is added in template
The position of the needs such as difficult channel or draft difficulty, installs venting plug, and venting plug connects vacuum suction device by exhaust pipe；
S3: the compacting of vacuum debulk: while vacuumizing, upper compacting molding sand allows molding sand to be compacted i.e. under negative pressure state
It can.
Upper compacting mode: i.e. pressure head 1 is located at top, and sand frame 3 is added to be located under pressure head, and on sandbox, template 4 is located at sandbox
2 lower part: working principle: first use other sand adding methods, such as gravity plus sand, penetrate sand, vacuum adds sand, manually plus sand,
Sandbox and plus sand frame is added in sand.Secondly exist from the sand near the venting plug rapid vacuumizing in template, such venting plug
, can be mobile to venting plug under vacuum action, which achieves the functions of vacuum oriented stop-off.When mobile sand reaches venting plug
Near, it, can be by Air flow press when being stopped by template and venting plug, which achieves the functions that vacuum pinpoints pre- consolidation.Then it presses
Head is compacted from the top down.When pressure head plus sand frame, sandbox and template form a confined space, vacuumizes, extract out between molding sand
Air can be resisted when being compacted in this way to avoid air, press to obtain more consolidation.And after avoiding compacting, among casting mold
The rebound of casting mold caused by compressed air, can be improved the precision of casting in this way.
Embodiment 2
A kind of vacuum static press moulding device casting green sand molding, including shuttering supporting case, on the shuttering supporting case
It has been superposed template and has been fixed with sandbox, be provided in the sandbox and add sand frame, be provided with pressure head on described plus sand frame, it is described
It is provided in template plus sand difficulty channel, described plus sand difficulty channel is located in sandbox, be arranged in described plus sand difficulty channel
Venting plug, described plus sand difficulty channel bottom are fixedly connected with vacuum suction device, the vacuum suction dress by exhaust pipe
The output end set is provided with quck-opening valve.
Its vacuum static press moulding method the following steps are included:
S1: add sand: adding sand frame to be put into sandbox, then fill sand, vacuumized using vacuum suction device, allow molding sand to row
Vent plug flowing, and accumulation and consolidation near venting plug；
S2: vacuum pinpoints pre- consolidation: template and sandbox successively being overlayed and are fixed on shuttering supporting case, sand is added in template
The position of the needs such as difficult channel or draft difficulty, installs venting plug, and venting plug connects vacuum suction device by exhaust pipe；
S3: the compacting of vacuum debulk: while vacuumizing, lower compacting molding sand allows molding sand to be compacted i.e. under negative pressure state
It can.
Real mode is pushed, template is also made to be compacted mode: i.e. pressure head, top is located at using concora crush head 1 here, adds sand frame 3
Under sandbox, on template 4, template 4 is located at plus the lower part of sand frame 3: working principle: using other sand adding methods first, such as
Gravity add sand, penetrate sand, vacuum adds sand, manually plus sand etc., sandbox and plus sand frame is added in sand.Secondly from the exhaust in template
Rapid vacuumizing is filled in, the sand near such venting plug under vacuum, can be mobile to venting plug, and it is fixed which achieves vacuum
To the function of stop-off., can be by Air flow press when mobile sand reaches near venting plug, is stopped by template and venting plug, this
It is achieved that vacuum pinpoints the function of pre- consolidation.Then template is compacted from bottom to top, indentation plus sand frame.Pressure head is located on sandbox
Portion, it is passive to resist compacting.When pressure head plus sand frame, sandbox and template form a confined space, vacuumize, extraction molding sand it
Between air can be resisted when being compacted in this way to avoid air, press to obtain more consolidation.And after avoiding compacting, among casting mold
Compressed air caused by casting mold rebound, the precision of casting can be improved in this way.
Embodiment 3
A kind of vacuum static press moulding device casting green sand molding, including shuttering supporting case, on the shuttering supporting case
It has been superposed template and has been fixed with sandbox, be provided in the sandbox and add sand frame, be provided with pressure head on described plus sand frame, it is described
It is provided in template plus sand difficulty channel, described plus sand difficulty channel is located in sandbox, be arranged in described plus sand difficulty channel
Venting plug, described plus sand difficulty channel bottom are fixedly connected with vacuum suction device, the vacuum suction dress by exhaust pipe
The output end set is provided with quck-opening valve.
Its vacuum static press moulding method the following steps are included:
S1: add sand: adding sand frame to be put into sandbox, then fill sand, vacuumized using vacuum suction device, allow molding sand to row
Vent plug flowing, and accumulation and consolidation near venting plug；
S2: vacuum pinpoints pre- consolidation: template and sandbox successively being overlayed and are fixed on shuttering supporting case, sand is added in template
The position of the needs such as difficult channel or draft difficulty, installs venting plug, and venting plug connects vacuum suction device by exhaust pipe；
S3: the compacting of vacuum debulk: while vacuumizing, two-sided compacting molding sand allows molding sand to be compacted under negative pressure state
?.
When vacuumizing, the vacuum degree of vacuum plant is higher than -0.7, and (namely air pressure is lower than vacuum static pressure
When 30000pa), effect is best, and suction is stronger.When vacuum degree is between -0.4 to -0.7 (air pressure 30000-70000pa it
Between), it is also effective.It is ineffective when vacuum degree is lower than -0.7 (air pressure is higher than 70000pa).
When vacuum debulk, if effect is preferable when the vacuum degree in sandbox 2 is higher than -0.5 (air pressure is lower than 50000pa).
It is also effective if the vacuum degree in sandbox 2 is between -0.5 to -0.3 (air pressure is between 50000-70000pa).Very
It is ineffective when reciprocal of duty cycle is lower than -0.3 (air pressure is lower than 70000pa).
When vacuum static pressure function, venting plug 5 is only installed at the desired position, the quantity of venting plug 5 is more fewer better.Therefore
It only needs adding the position of sand difficulty and moulding difficulty that venting plug 5 is installed, simple casting can be not suitable for venting plug 5 completely.
It is compared with traditional static press moulding, greatly reduces 5 dosage of venting plug, reduce die cost.
Two-sided compacting mode: seaming chuck is multiple contact pressure head here, and 1 is located at top, and 2 plus sand frame 3 are located under sandbox
On template 4, template 4 is located at plus the lower part of sand frame 3: working principle: using other sand adding methods first, as gravity plus sand,
Penetrate sand, vacuum adds sand, manually plus sand etc., sandbox 2 and plus sand frame 3 is added in sand.Secondly quick from the venting plug in template 4
It vacuumizes, the sand near such venting plug 5 under vacuum, can be mobile to venting plug 5, and which achieves vacuum oriented benefits
The function of sand., can be by Air flow press when mobile sand reaches near venting plug 5, is stopped by template 4 and venting plug 5, this is just
Realize the function that vacuum pinpoints pre- consolidation.Then template 4 is compacted from bottom to top, indentation plus sand frame 3.Pressure head is located on sandbox 2
Portion, it is passive to resist compacting, it draws back.After template 4 is compacted, pressure head 1 is compacted downwards, completes final compacting.When pressure head 1,
It when sand frame 3, sandbox 2 and template 4 being added to form a confined space, vacuumizes, extracts the air between molding sand out, when being compacted in this way,
It can be resisted to avoid air, press to obtain more consolidation.And after avoiding compacting, casting mold caused by the compressed air among casting mold
Rebound, can be improved the precision of casting in this way.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of vacuum static press moulding device for casting green sand molding, including shuttering supporting case (8), it is characterised in that: described
It has been superposed template (4) on shuttering supporting case (8) and has been fixed with sandbox (2), has been provided in the sandbox (2) and adds sand frame (3),
It is provided with pressure head (1) on described plus sand frame (3), the bottom of the template (4) is arranged with venting plug (5), the bottom of the template (4)
Portion is fixedly connected with vacuum suction device (7) by exhaust pipe, and the output end of the vacuum suction device (7) is provided with quck-opening valve
(6)。
2. a kind of vacuum static press moulding device for casting green sand molding according to claim 1, it is characterised in that: described
Pressure head (1) is plate pressure head, profiling pressure head, multiple contact or rubber squeeze head.
3. a kind of vacuum static press moulding device for casting green sand molding according to claim 1, it is characterised in that: described
The diameter of venting plug (5) is greater than 5mm.
4. a kind of as described in claim 1 vacuum static press moulding method of casting green sand molding, it is characterised in that: including with
Lower step:
S1: add sand: adding sand frame to be put into sandbox, then fill sand, vacuumized using vacuum suction device, allow molding sand to venting plug
Flowing, and accumulation and consolidation near venting plug；
S2: vacuum pinpoints pre- consolidation: template and sandbox successively being overlayed and are fixed on shuttering supporting case, in template plus sand is difficult
The position of the needs such as channel or draft difficulty, installs venting plug, and venting plug connects vacuum suction device by exhaust pipe；
S3: the compacting of vacuum debulk: while vacuumizing, compacting molding sand allows molding sand to be compacted under negative pressure state.
5. a kind of vacuum static press moulding method for casting green sand molding according to claim 2, it is characterised in that: described
The vacuum degree condition of high vacuum degree that vacuum suction fills in S2 step is not less than -0.7 (air pressure is higher than 70000pa).
6. a kind of vacuum static press moulding method for casting green sand molding according to claim 3, it is characterised in that: described
The vacuum degree in sandbox in S3 step cheek is not less than -0.3 (air pressure is lower than 70000pa).
7. a kind of vacuum static press moulding method for casting green sand molding according to claim 3, it is characterised in that: described
Compacting molding sand in S3 step can be plate compacting, microseism compacting, multiple contact compacting or profiling compacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810930291.2A CN109108235A (en) | 2018-08-15 | 2018-08-15 | A kind of formative method and device for green sand molding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810930291.2A CN109108235A (en) | 2018-08-15 | 2018-08-15 | A kind of formative method and device for green sand molding |
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| CN109108235A true CN109108235A (en) | 2019-01-01 |
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| CN201810930291.2A Pending CN109108235A (en) | 2018-08-15 | 2018-08-15 | A kind of formative method and device for green sand molding |
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| CN110216247A (en) * | 2019-07-17 | 2019-09-10 | 晋江鹏发机械有限公司 | Casting clay-bonded sand wet process formative technology |
| CN112916848A (en) * | 2021-01-26 | 2021-06-08 | 康硕(山西)智能制造有限公司 | Aluminum alloy lost foam casting system |
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| CN115859532A (en) * | 2023-02-10 | 2023-03-28 | 潍柴动力股份有限公司 | Multi-cylinder engine air inlet profile design method and multi-cylinder engine |
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| CN110216247A (en) * | 2019-07-17 | 2019-09-10 | 晋江鹏发机械有限公司 | Casting clay-bonded sand wet process formative technology |
| CN112916848A (en) * | 2021-01-26 | 2021-06-08 | 康硕(山西)智能制造有限公司 | Aluminum alloy lost foam casting system |
| CN113996758A (en) * | 2021-10-29 | 2022-02-01 | 苏州明志科技股份有限公司 | V-method vertical modeling process and production line thereof |
| CN113996758B (en) * | 2021-10-29 | 2023-07-21 | 苏州明志科技股份有限公司 | V-method vertical modeling process and production line thereof |
| CN115351237A (en) * | 2022-08-10 | 2022-11-18 | 潍柴动力股份有限公司 | Core preparation method |
| CN115859532A (en) * | 2023-02-10 | 2023-03-28 | 潍柴动力股份有限公司 | Multi-cylinder engine air inlet profile design method and multi-cylinder engine |
| CN115859532B (en) * | 2023-02-10 | 2023-05-23 | 潍柴动力股份有限公司 | Multi-cylinder engine air inlet molded line design method and multi-cylinder engine |
| CN116079007A (en) * | 2023-04-07 | 2023-05-09 | 蓬莱金创精密铸造有限公司 | Casting die for automobile exhaust connector and manufacturing process |
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