CN105618685B - A kind of large-scale constant pitch airscrew casting dead head structure and its manufacture method - Google Patents
A kind of large-scale constant pitch airscrew casting dead head structure and its manufacture method Download PDFInfo
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- CN105618685B CN105618685B CN201511024908.7A CN201511024908A CN105618685B CN 105618685 B CN105618685 B CN 105618685B CN 201511024908 A CN201511024908 A CN 201511024908A CN 105618685 B CN105618685 B CN 105618685B
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- rising head
- head
- sand
- constant pitch
- plank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Revetment (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of large-scale constant pitch airscrew casting dead head structure, including：Rising head, enclose sand, the core pipe positioned at rising head center around the rising head of the rising head；Sand and the demarcation strip of core pipe are enclosed described in multiple connections respectively；Rising head decile is formed multiple cut sections by multiple described demarcation strips.As preferred embodiment, described demarcation strip includes the silicate aluminum board of internal layer and the normal carbon steel plate of outer layer.With the above mentioned technical proposal, a kind of large-scale constant pitch airscrew casting dead head structure disclosed by the invention, rising head directly be divide into several parts during rising head casting, the feeding effect of rising head is not changed, rising head is after the big end cutting of propeller removes, some fritters can be automatically separated into, avoid the step of prior art cuts rising head, reduce rising head as the cutting loss during the follow-up use of foundry returns.And it is ripe using manufacture craft, it is simple in construction to be easily achieved, it is fully compatible for promoting on a large scale.
Description
Technical field
The present invention relates to propeller dead head and manufacture method, more particularly to it is a kind of and quick by the thin metal connecting plate
Combine the gang form formed.It is related to Patent classificating number B22 castings；Powder metallurgy B22C casting and molding B22C9/00 casting molds or type
Part relevant with pouring into molten metal core B22C9/08, such as ingate, circular gate, pushing off the slag cast gate.
Background technology
At present, the melting of marine propeller copper alloy mainly uses medium-frequency induction furnace, by fire door (30 tons of Medium frequency induction electricity
Stove) diameter limitation, when the rising head diameter of large-scale spacing oar is more than 1500mm, it is impossible to use, need to make as the direct shove charge of foundry returns
After carrying out at least segmentation of 3 equal portions to rising head with instruments such as carbon arc air gougings, the size requirement of fire door could be met.
AndUse carbon arc gas, it is necessary to expend substantial amounts of electric energy when rising head is cut in slicing, and waste of manpower, while can cause
Burning loss of alloy.Therefore, after large-scale spacing oar rising head cutting, it is not required to secondary cutting and is directly used as foundry returns as large-scale at this stage fixed
Technical bottleneck away from oar Feeder Design.
The content of the invention
The present invention is directed to the proposition of problem above, and a kind of large-scale constant pitch airscrew developed casts dead head structure, including：
Rising head, sand, the core pipe positioned at rising head center are enclosed around the rising head of the rising head, core pipe core is carried outside core pipe；
Sand and the demarcation strip of core pipe are enclosed described in multiple connections respectively；Multiple described demarcation strips are more by rising head decile, formation
Individual cut section.
As preferred embodiment, described demarcation strip includes the silicate aluminum board of internal layer.
Further, the outer layer of described silicate aluminum board is also wrapped on carbon steel plate.
As preferred embodiment, described rising head, which encloses to be provided with inside sand, fills out rising head ring gate.
Further, it is described fill out rising head ring gate and be provided with described each cut section described in connection fill out rising head
Ring gate fills out rising head ingate.
As preferred embodiment, described demarcation strip encloses sand inwall and core tube wall by being arranged on rising head respectively
Connecting portion is fixed.
As preferred embodiment, it is described fill out rising head ring gate and be additionally provided with filled out with what rising head enclosed that sand upper surface connects
Rising head down gate.
A kind of manufacture method of large-scale constant pitch airscrew casting dead head structure, has following steps：
- multiple plank I being centrosymmetric are placed outside described core pipe core upper end；Each plank carries withdrawing pattern
Gradient；
- on the outside of aluminum dipping form full pattern, multiple plank II of the quantity such as placement and plank I, plank II center symmetric settings；
- sand rammer rising head is gone up, after rising head sizing, plank I and plank II are removed, fixing groove is formed, by described demarcation strip
Fixing groove is inserted at both ends respectively, brushing paint after ramming consolidation.
It is pre-buried described to fill out rising head ring gate earthenware as preferred embodiment；In described each cut section
It is pre-buried to fill out rising head ingate earthenware；It is pre-buried enclose that sand upper surface connects with rising head fill out rising head down gate earthenware.
By adopting the above-described technical solution, a kind of large-scale constant pitch airscrew casting dead head structure disclosed by the invention,
Rising head directly be divide into several parts during rising head casting, do not change the feeding effect of rising head, rising head is in spiral shell
After revolving the big end cutting removal of oar, some fritters can be automatically separated into, the step of prior art cuts rising head is avoided, reduces rising head
As the cutting loss during the follow-up use of foundry returns.And it is ripe using manufacture craft, it is simple in construction to be easily achieved, very
Suitable for promoting on a large scale.
Brief description of the drawings
, below will be to embodiment or existing for clearer explanation embodiments of the invention or the technical scheme of prior art
There is the required accompanying drawing used in technology description to do one and simply introduce, it should be apparent that, drawings in the following description are only
Some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the schematic diagram of dead head structure of the present invention
Fig. 2 is the Section A-A schematic diagram of accompanying drawing 1
Fig. 3 is the section B-B schematic diagram of accompanying drawing 1
Embodiment
To make the purpose, technical scheme and advantage of embodiments of the invention clearer, with reference to the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly completely described：
As Figure 1-3：
A kind of large-scale constant pitch airscrew casting dead head structure, mainly includes：Rising head 5, the rising head around the rising head 5 enclose sand
1st, positioned at the core pipe 3 in the center of rising head 5.
As preferred embodiment, described rising head encloses sand 1 in cylinder, and the outer wall for enclosing the inwall and rising head 5 of sand is matched somebody with somebody
Close, as shown in figure 1, the space surrounded for enclosing sand inwall is round platform.
Core pipe 3 is steel pipe, and preferable uses Q235 steel pipes, can also use the steel of other materials.Accordingly, it is outside
Provided with enclosing the material identical core pipe core 4 of sand 1 with rising head.
In order to save follow-up rising head cutting step, as preferable implementation steps, sand 1 and core pipe are enclosed in described rising head
Multiple demarcation strips 2 are provided between 3, as shown in figure 1, totally 3 demarcation strips 2, three parts are divided into by rising head 5, that is, form three segmentations
Area.In other embodiments, multiple demarcation strips 2 can be also set, rising head is separated into multiple according to the size of fire door and propeller
Part.
As preferred embodiment, described demarcation strip 2 can high thermal stability, the silicate aluminum board of melting welding will not occur
21, temperature can be split in 1180 DEG C of copper alloy solutions so that after fill out rising head be naturally divided into it is multiple.
Further, it is contemplated that simple is insufficient using the intensity of silicate aluminum board 21, possibly can not keep out in casting process
The impact of copper alloy solution, cause local destroyed；And silicate aluminum board 21 can not ensure at high temperature due to the characteristic of itself
Copper liquid can completely be completely cut off.
It is MULTILAYER COMPOSITE material to pretend as preferred embodiment, described demarcation strip 2, i.e., described silicate aluminum board 21 is gone back
It is coated with one layer of carbon steel plate 22.Multi-layer compound structure can ensure that demarcation strip 2 can completely completely cut off high-temperature copper liquid, and have
Enough intensity is prepared enough, impact during cast can be kept out.Even if with copper liquid melting welding occurs for the surface of outside carbon steel plate, also not
The silicate aluminum board 21 of inside can be had an impact, it is ensured that segmentation effect.
As preferred embodiment, described rising head, which encloses to be provided with inside sand 1, fills out rising head ring gate 6.Described filling out emits
Mouthful ring gate 6 be provided with described each cut section fill out rising head ring gate 6 described in connection fill out rising head ingate 7.Institute
The rising head ring gate 6 of filling out stated is additionally provided with to enclose after the upper surface of sand 1 connects with rising head and fills out rising head down gate 9.
Copper liquid in the present invention enters ring gate 6 by filling out rising head down gate 9 after described first, then by point
Rising head ingate 7 of filling out not in each marker space enters cut section, it is ensured that the uniformity of copper liquid.It is also possible to enter
Impact of the reduction copper liquid of one step to demarcation strip 21, it is ensured that enclose sand and core in the case of without specially treated.I.e.
Demarcation strip 21 can be fixed.
Enclose the connecting portion of the inwall of sand 1 and the outer wall of core pipe 3 by being arranged on rising head respectively as preferable described demarcation strip 2
8 fix.The inside of described connecting portion 8 is provided with groove, and under assembled state, the both ends of demarcation strip 2 are located at the recessed of a connecting portion 8 respectively
In groove.
A kind of manufacture method of large-scale constant pitch airscrew casting dead head structure, has and is divided into following steps：
1st, in demarcation strip loam core fixing groove making.In the manufacturing process of propeller hub loam core, divide equally outside loam core upper end
3 pieces of planks for carrying pattern draft are placed, the length of plank subtracts 50mm for riser height, and thickness and width is 60mm.Mud
After core completes, plank is taken out.
2nd, on demarcation strip rising head fixing groove making.When pounding rising head, on the outside of aluminum dipping form full pattern, uniformly put 3 pieces and carry
The plank of pattern draft, the length of plank subtract 50mm, width 100mm, thickness 60mm for riser height.Upper sand rammer rising head,
Rising head is pounded after the completion of system, and plank is taken out.
3rd, the making of rising head running channel is filled out.When the system of pounding fills out rising head running channel, it is necessary to pre-buried ring gate one, while each
Marker space reserves one, cast gate.
4th, the use of demarcation strip is fixed.When grinding core, by three fixing grooves in loam core and three fixing groove phases on rising head
It is corresponding, rising head demarcation strip is placed in fixing groove, ramming consolidation, swabbing.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
- A kind of 1. large-scale constant pitch airscrew casting dead head structure, it is characterised in that including：Rising head (5), around the rising head (5) Rising head encloses sand (1), the core pipe (3) positioned at rising head (5) center, and core pipe core (4) is carried outside core pipe (3)；Sand (1) and the demarcation strip (2) of core pipe (3) are enclosed described in multiple connections respectively；Multiple described demarcation strips (2) are by rising head etc. Point, form multiple cut sections；Described rising head, which encloses to be provided with inside sand (1), fills out rising head ring gate (6)；Described fills out rising head ring gate (6) described Each cut section in be provided with fill out rising head ring gate (6) described in connection fill out rising head ingate (7)；Fill out rising head ring gate (6) it is additionally provided with and fills out rising head down gate (9) with what rising head enclosed that sand (1) upper surface connects.
- 2. a kind of large-scale constant pitch airscrew casting dead head structure according to claim 1, is further characterized in that：Described point Dividing plate (2) is silicate aluminum board (21).
- 3. a kind of large-scale constant pitch airscrew casting dead head structure according to claim 2, is further characterized in that：Described silicon The outer layer of sour aluminium sheet (21) is also wrapped on carbon steel plate (22).
- 4. a kind of large-scale constant pitch airscrew casting dead head structure according to claim 1, is further characterized in that：Described point The connecting portion (8) that dividing plate (2) encloses sand (1) inwall and core pipe (3) outer wall by being arranged on rising head respectively is fixed；Described connecting portion (8) internal to be provided with groove, under assembled state, the both ends of demarcation strip (2) are located in the groove of a connecting portion (8) respectively.
- A kind of 5. manufacturer of large-scale constant pitch airscrew casting dead head structure as described in any claims of claim 1-4 Method, it is characterised in that there are following steps：- multiple plank I being centrosymmetric are placed outside described core pipe core upper end；Each plank carries pattern draft；- on the outside of aluminum dipping form full pattern, multiple plank II of the quantity such as placement and plank I, plank II center symmetric settings；- sand rammer rising head is gone up, after rising head sizing, plank I and plank II are removed, fixing groove is formed, by described demarcation strip (2) Fixing groove is inserted at both ends respectively, brushing paint after ramming consolidation.
- 6. the manufacture method of large-scale constant pitch airscrew casting dead head structure according to claim 5, is further characterized in that： Pound rising head processed when, it is pre-buried described to fill out rising head ring gate earthenware；Rising head ingate is filled out described each cut section is pre-buried Earthenware；It is pre-buried enclose that sand upper surface connects with rising head fill out rising head down gate earthenware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024908.7A CN105618685B (en) | 2015-12-30 | 2015-12-30 | A kind of large-scale constant pitch airscrew casting dead head structure and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024908.7A CN105618685B (en) | 2015-12-30 | 2015-12-30 | A kind of large-scale constant pitch airscrew casting dead head structure and its manufacture method |
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| Publication Number | Publication Date |
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| CN105618685A CN105618685A (en) | 2016-06-01 |
| CN105618685B true CN105618685B (en) | 2017-12-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569927A (en) * | 2009-06-11 | 2009-11-04 | 芜湖新联造船有限公司 | System for casting and pouring propeller of ship |
| CN202715777U (en) * | 2012-08-20 | 2013-02-06 | 桐乡合德机械有限公司 | Exothermic riser neck structure of casting |
| CN202963378U (en) * | 2012-12-27 | 2013-06-05 | 天瑞集团铸造有限公司 | Easy-to-cut feed head |
| CN203091677U (en) * | 2013-01-04 | 2013-07-31 | 天津凯星科技有限公司 | Novel riser bush suitable for multiple hot nodes |
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
| CN204381298U (en) * | 2014-12-31 | 2015-06-10 | 青田中天铸造阀门有限公司 | A kind of casting mold rising head |
-
2015
- 2015-12-30 CN CN201511024908.7A patent/CN105618685B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101569927A (en) * | 2009-06-11 | 2009-11-04 | 芜湖新联造船有限公司 | System for casting and pouring propeller of ship |
| CN202715777U (en) * | 2012-08-20 | 2013-02-06 | 桐乡合德机械有限公司 | Exothermic riser neck structure of casting |
| CN202963378U (en) * | 2012-12-27 | 2013-06-05 | 天瑞集团铸造有限公司 | Easy-to-cut feed head |
| CN203091677U (en) * | 2013-01-04 | 2013-07-31 | 天津凯星科技有限公司 | Novel riser bush suitable for multiple hot nodes |
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
| CN204381298U (en) * | 2014-12-31 | 2015-06-10 | 青田中天铸造阀门有限公司 | A kind of casting mold rising head |
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| Publication number | Publication date |
|---|---|
| CN105618685A (en) | 2016-06-01 |
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