CN207086851U - A kind of tooth form film covered sand core and the mould for making the core - Google Patents
A kind of tooth form film covered sand core and the mould for making the core Download PDFInfo
- Publication number
- CN207086851U CN207086851U CN201720975123.6U CN201720975123U CN207086851U CN 207086851 U CN207086851 U CN 207086851U CN 201720975123 U CN201720975123 U CN 201720975123U CN 207086851 U CN207086851 U CN 207086851U
- Authority
- CN
- China
- Prior art keywords
- gear ring
- tooth form
- film covered
- form film
- shaping loop
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of tooth form film covered sand core and make the mould of the core, wherein tooth form film covered sand core includes foundation ring, the outer shaping loop being arranged on foundation ring and interior shaping loop, the inner side of the outer shaping loop is provided with the internal tooth for coordinating gear ring, the interior shaping loop is provided with some positioning tabs, gear ring fixed slot is formed between the outer shaping loop and interior shaping loop, one of positioning tab is provided with gear ring cast gate, other several positioning tabs are provided with gear ring rising head, and the gear ring cast gate, gear ring rising head connect with gear ring fixed slot.The utility model makes the tooth form film covered sand core of dimensionally stable using high intensity precoated sand so thatGear ring tooth form directly casts out, without gear hobbing process so that producing big footpath gear ring becomes easy, and fast, Product Precision is high, and production efficiency is high, and production cost is greatly lowered.
Description
Technical field
The utility model belongs to machine-building manufacture field, more particularly to a kind of tooth form film covered sand core and makes the core
Mould.
Background technology
Ring gear machining method is divided into two methods of gear hobbing process and not gear hobbing process in the prior art；
Wherein hobbing method for processing：All types gear ring can be produced；But technique is complex, high processing costs, production
Efficiency is low, and Product Precision is poor；
And existing not hobbing method for processing：It is less than 100mm solid small gear ring with paraffin ceramics precision casting technology production diameter,
The transmission parts not high for rotating speed.But when directly Foundry Production diameter is more than 100mm gear ring, produced because wax pattern deforms
Tooth form is irregular, flatness difference and cast is caused expansion and contraction distortion is inconsistent causes accessory size unstable, precision
Difference and can not produce；
Therefore,Gear ring is typically all to be processed using hobbing method for processing；Its production technology is as follows：
One：Cast blank：
1. it is secondary to make aluminum dipping form 1；
2. clay is husky and removable flask moulding, one case one；
3. cast；
4. cleaning；- blank completes.
Two：Machining：
1. lathe process, car is to all sizes；
2. gear hobbing machines, tooth form (once rolling two, three hours every time, the averagely need 1.5 hours of gear hobbing one) is rolled out；
3. drilling machine reaming；
4. repair hair；- part completes.
Technique is complex, high processing costs, low production efficiency, and Product Precision is low.
Utility model content
The utility model is in order to solve defect present in above-mentioned prior art and deficiency, there is provided one kind causes
Gear ring tooth form directly casts out, without gear hobbing process so that producing big footpath gear ring becomes easy, and fast, Product Precision is high, production effect
Rate is high, and the tooth form film covered sand core of production cost is greatly lowered and makes the mould of the core.
The technical solution of the utility model：A kind of tooth form film covered sand core, including foundation ring, the outer shaping loop that is arranged on foundation ring
With interior shaping loop, the inner side of the outer shaping loop is provided with the internal tooth for coordinating gear ring, and the interior shaping loop is provided with some convexes
Ear, gear ring fixed slot is formed between the outer shaping loop and interior shaping loop, one of positioning tab is provided with gear ring cast gate, separately
Outer several positioning tabs are provided with gear ring rising head, and the gear ring cast gate, gear ring rising head connect with gear ring fixed slot.
The utility model makes the tooth form film covered sand core of dimensionally stable using high intensity precoated sand so thatGear ring tooth
Shape directly casts out, without gear hobbing process so that and producing big footpath gear ring becomes easy, and fast, Product Precision is high, and production efficiency is high,
Production cost is greatly lowered.
Preferably, the quantity of the positioning tab is four, is in 90 ° of angles between the adjacent positioning tab of each two, often
Individual positioning tab is provided with positioning hole, and one of positioning tab bottom is provided with gear ring cast gate, the other three positioning tab top
Provided with gear ring rising head.
The utility model reasonable Arrangement is poured, rising head position, makes contraction consistent, solve well gear ring size it is unstable and
Circularity difference problem.
Preferably, the gear ring cast gate and gear ring rising head connect with positioning hole, the both sides of the positioning tab with it is default
Type circle is connected.
Convenient multiple tooth form film covered sand cores stack up of this kind of structure is poured into a mould together, improves production efficiency.
Preferably, through hole is formed between the interior shaping loop and 4 positioning tabs.
This kind of structure can save precoated sand raw material, reduce cost of manufacture.
It is a kind of to be used to making the mould of tooth form film covered sand core, including upper mould cover, lower membrane cover, core rod, blast mouth, with unification
One mould gate of gear ring cast gate and three mould rising heads for coordinating three gear ring rising heads, the core rod include coordinating outer shape
The first annular groove of circle, coordinate in shaping loop the second annular groove and coordinate the arc groove of positioning tab, described the
One annular groove, the second annular groove and arc groove connect with blast mouth.
The utility model facilitates the making of tooth form film covered sand core, it is ensured that tooth form film covered sand core intensity and profile accuracy.
Preferably, annular protrusion is formed between the first annular groove and the second annular groove, outside the annular protrusion
Surface is provided with the external tooth for coordinating internal tooth on outer shaping loop.
This kind of structure further ensures that the profile accuracy of tooth form film covered sand core.
Preferably, the cylindrical protrusions for coordinating positioning hole are provided with the arc groove, the cylindrical protrusions are provided with
Coordinate the sand export of blast mouth, the arc groove connects with the second annular groove.
A kind of method that gear ring is prepared with tooth form film covered sand core, comprises the steps：
1) the blast mouth of mould is connected into core shooter by blow plate and makes tooth form film covered sand core；
2) if tooth form film covered sand core made from step 1) is folded into dried layer, overcoat cylinder iron case；
3) the gear ring rising head of top layer tooth form film covered sand core is sealed with film；
4) gap between cylindrical iron case and tooth form film covered sand core is filled up with resin sand and stoppered；
5) gear ring that molten iron is entered in bottom tooth form film covered sand core by the gear ring cast gate of bottom tooth form film covered sand core is determined
Moulding by casting in type groove, entered by the positioning hole and gear ring rising head of each layer tooth form film covered sand core in each layer tooth form film covered sand core
Moulding by casting in gear ring fixed slot；
6) gas cutting cast gate and rising head, and obtain gear ring blank after clearing up cylindrical iron case；
7) processed finally by axle, drilling machine reaming and Xiu Mao obtain gear ring product.
Preferably, the number of plies of tooth form film covered sand core is 13 layers in the step 2), and 13 layers of tooth form film covered sand core are using positioning
Post is located in the positioning hole of each layer and positioned, and the positioning hole connection of each layer tooth form film covered sand core.
Preferably, gear ring tooth form uniformity made from this method, tooth-face roughness is low, and gear ring size existsBetween.
The utility model makes dimensionally stable tooth form film covered sand core moulding first with precoated sand high intensity, in overcoat cylinder
Metal bucket, gap, stoppered with the hard sand of inexpensive resin, make not producing expansion during cast, then reasonable Arrangement is poured, rising head position, is made
Shrink consistent, solve the problems, such as that gear ring size is unstable and circularity difference well, using stack pouring, substantially increase production
Rate so that producing big footpath footpath gear ring becomes easy, fast, production cost is greatly lowered.This technique production major diameter, low turn
Speed transmission gear ring is with a wide range of applications.
Brief description of the drawings
Fig. 1 is the structural representation of tooth form film covered sand core in the utility model；
Fig. 2 is the mould structure schematic diagram that film covered sand core is made in the utility model；
Fig. 3 is the structural representation of obtained gear ring in the utility model；
1. foundation ring in figure, 2. outer shaping loops, shaping loop in 3., 4. positioning tabs, 5. positioning holes, 6. gear ring rising heads, in 7.
Tooth, 8. through holes, 9. upper mould covers, 10. times membrane covers, 11. first annular grooves, 12. second annular grooves, 13. annular protrusions, 14.
External tooth, 15. cylindrical protrusions, 16. arc grooves, 17. sand exports, 18. blast mouths, 19. mould gates, 20. mould rising heads,
21. gear ring fixed slot.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, but is not that model is protected to the utility model
The limitation enclosed.
As shown in figs. 1 and 3, a kind of tooth form film covered sand core, including foundation ring 1, the outer shaping loop 2 that is arranged on foundation ring 1 and interior
Shaping loop 3, the inner side of outer shaping loop 1 are provided with the internal tooth 7 for coordinating gear ring, and interior shaping loop 3 is provided with 4 positioning tabs 4, outer sizing
Gear ring fixed slot 21 is formed between circle 2 and interior shaping loop 3, one of positioning tab 4 is provided with gear ring cast gate, determines for 3 in addition
Position lug is provided with gear ring rising head 6, and gear ring cast gate, gear ring rising head 6 connect with gear ring fixed slot 21.The adjacent positioning of each two
It is in 90 ° of angles between lug 4, each positioning tab 4 is provided with positioning hole 5, and one of bottom of positioning tab 4 is poured provided with gear ring
Mouthful, the top of the other three positioning tab 4 is provided with gear ring rising head 6.Gear ring cast gate and gear ring rising head 6 connect with positioning hole 5, positioning
The both sides of lug 4 are connected with interior shaping loop 3.Through hole 8 is formed between interior shaping loop 3 and 4 positioning tabs 4.
As shown in Figures 2 and 3, a kind of mould for being used to make tooth form film covered sand core, including upper mould cover 9, lower membrane cover 10, mould
Core, blast mouth 18, the mould gate 19 with unification gear ring cast gate and three mould rising heads for coordinating three gear ring rising heads 6
20.Core rod includes coordinating the first annular groove 11 of outer shaping loop 2, the second annular groove 12 of shaping loop 3 and matches somebody with somebody in cooperation
Close positioning tab 4 arc groove 16, first annular groove 11, the second annular groove 12 and arc groove 16 with blast mouth 18
Connection.Annular protrusion 13 is formed between the first annular annular groove 12 of groove 11 and second, the outer surface of annular protrusion 13, which is provided with, matches somebody with somebody
Close the external tooth 14 of internal tooth 7 on outer shaping loop 2.The cylindrical protrusions 15 for coordinating positioning hole 5, circular cylindrical projection are provided with arc groove 16
Play 15 and be provided with the sand export 17 for coordinating blast mouth 18, arc groove 16 connects with the second annular groove 12.
A kind of method that gear ring is prepared with tooth form film covered sand core, comprises the steps：
1) the blast mouth of mould is connected into core shooter by blow plate and makes tooth form film covered sand core；
2) if tooth form film covered sand core made from step 1) is folded into dried layer, overcoat cylinder iron case；
3) the gear ring rising head of top layer tooth form film covered sand core is sealed with film；
4) gap between cylindrical iron case and tooth form film covered sand core is filled up with resin sand and stoppered；
5) molten iron successively fills type, moulding by casting after gear ring cast gate enters bottom tooth form overlay film sand mold through rising head；
6) gas cutting cast gate and rising head, gear ring blank is obtained after impeller blasting and polishing cleaning；
7) gear ring product is obtained finally by Vehicle Processing, drilling machine reaming and Xiu Mao.
The number of plies of tooth form film covered sand core is 13 layers in step 2), and 13 layers of tooth form film covered sand core are located in each layer using locating dowel
Positioning hole in positioned, and each layer tooth form film covered sand core positioning hole connection.Gear ring tooth form uniform one made from this method
Cause, tooth-face roughness is low, and gear ring size existsBetween.
The utility model makes dimensionally stable tooth form core moulding, then overcoat cylinder iron first with precoated sand high intensity
Bucket, gap, is stoppered with the hard sand of inexpensive resin, makes not producing expansion during cast, then reasonable Arrangement is poured, and rising head position, makes receipts
Contracting is consistent, solves the problems, such as that gear ring size is unstable and circularity difference well, using stack pouring, substantially increases productivity ratio,
So that producing big footpath footpath gear ring becomes easy, fast, production cost is greatly lowered.(diameter is big in production major diameter for this technique
In 100mm), slow-speed of revolution transmission gear ring is with a wide range of applications.
Claims (7)
- A kind of 1. tooth form film covered sand core, it is characterised in that：It includes foundation ring, the outer shaping loop being arranged on foundation ring and interior sizing Circle, the inner side of the outer shaping loop are provided with the internal tooth for coordinating gear ring, and the interior shaping loop is provided with some positioning tabs, described outer Gear ring fixed slot is formed between shaping loop and interior shaping loop, one of positioning tab is provided with gear ring cast gate, several fixed in addition Position lug is provided with gear ring rising head, and the gear ring cast gate, gear ring rising head connect with gear ring fixed slot.
- A kind of 2. tooth form film covered sand core according to claim 1, it is characterised in that：The quantity of the positioning tab is four It is individual, it is in 90 ° of angles between the adjacent positioning tab of each two, each positioning tab is provided with positioning hole, one of convex Eardrum portion is provided with gear ring cast gate, and gear ring rising head is provided with the top of the other three positioning tab.
- A kind of 3. tooth form film covered sand core according to claim 2, it is characterised in that：The gear ring cast gate and gear ring rising head are equal Connected with positioning hole, the both sides of the positioning tab are connected with interior shaping loop.
- A kind of 4. tooth form film covered sand core according to claim 3, it is characterised in that：The interior shaping loop and 4 convexes Through hole is formed between ear.
- A kind of 5. mould for being used to make tooth form film covered sand core, it is characterised in that：The mould is used to make as claimed in claim 4 Tooth form film covered sand core, and the mould includes upper mould cover, lower membrane cover, core rod, blast mouth, the mould with unification gear ring cast gate Cast gate and three mould rising heads for coordinating three gear ring rising heads, first annular groove of the core rod including the outer shaping loop of cooperation, The arc groove of second annular groove of shaping loop and cooperation positioning tab in cooperation, the first annular groove, the second ring Connected in star and arc groove connect with blast mouth.
- A kind of 6. mould for being used to make tooth form film covered sand core according to claim 5, it is characterised in that：First ring Annular protrusion is formed between connected in star and the second annular groove, the annular protrusion outer surface, which is provided with, coordinates internal tooth on outer shaping loop External tooth.
- A kind of 7. mould for being used to make tooth form film covered sand core according to claim 5, it is characterised in that：The arc is recessed The cylindrical protrusions for coordinating positioning hole are provided with groove, the cylindrical protrusions are provided with the sand export for coordinating blast mouth, the arc Connected in star connects with the second annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720975123.6U CN207086851U (en) | 2017-08-07 | 2017-08-07 | A kind of tooth form film covered sand core and the mould for making the core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720975123.6U CN207086851U (en) | 2017-08-07 | 2017-08-07 | A kind of tooth form film covered sand core and the mould for making the core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207086851U true CN207086851U (en) | 2018-03-13 |
Family
ID=61543925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720975123.6U Expired - Fee Related CN207086851U (en) | 2017-08-07 | 2017-08-07 | A kind of tooth form film covered sand core and the mould for making the core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207086851U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280714A (en) * | 2019-08-05 | 2019-09-27 | 莱州新安达汽车零部件有限公司 | A kind of the film covered sand core mold and operating method of the more detour Aluminum Alloy Tubes of abnormal shape |
-
2017
- 2017-08-07 CN CN201720975123.6U patent/CN207086851U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280714A (en) * | 2019-08-05 | 2019-09-27 | 莱州新安达汽车零部件有限公司 | A kind of the film covered sand core mold and operating method of the more detour Aluminum Alloy Tubes of abnormal shape |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20180807 |