CN104999036A - Process for solving problem of shrinkage of differential housing castings - Google Patents
Process for solving problem of shrinkage of differential housing castings Download PDFInfo
- Publication number
- CN104999036A CN104999036A CN201510514367.XA CN201510514367A CN104999036A CN 104999036 A CN104999036 A CN 104999036A CN 201510514367 A CN201510514367 A CN 201510514367A CN 104999036 A CN104999036 A CN 104999036A
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- Prior art keywords
- riser
- casting
- rising head
- molten iron
- running channel
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Links
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 230000000630 rising effect Effects 0.000 claims description 23
- 230000007547 defect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003031 feeding effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003832 thermite Substances 0.000 description 1
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a process for solving the problem of shrinkage of differential housing castings. According to the process, a casting, a sand core, a riser and a pouring gate are adopted, wherein the casting is a revolved body, the sand core is arranged in a center hole of the revolved body, the riser is arranged above the top of the casting, one side of the riser is pressed on the edge of the top of the casting, a recessed part is formed in the upper end of the sand core, a heating block is arranged in the recessed part, molten iron enters the riser after being injected into the whole casting from the pouring gate, the heating block reacts and generates heat, and the molten iron in the riser is supplemented with heat and feeds the casting from top to bottom perpendicularly. The castings are sequentially solidified through the riser pressed on the edge of the top and the heating block, so that sufficient feeding of thick and large flange annular bosses of annular castings such as differential housing castings and the like can be realized, the feeding distance is shortened, and defects of concentrated holes, inner cavity shrinkage depression, shrinkage of the lower end of the riser and the like are avoided.
Description
Technical field
The present invention relates to auto parts and components and accessory manufacturing technology field, more particularly, relate to differential mechanism and solve difference shell class Shrinkage Porosity technique.
Background technology
At present, differential mechanism difference shell series products is mostly the annular cast of hollow, and outside is then form of flanges, flange has more reinforcement, flange has a circle annular boss.This annular boss thickness is at 70-80mm, and greatly thicker, molten iron is final set always.Because feeding distance is remote, adopt the mode of outside riser feeding to be difficult to molten iron to cover cast-internal, cast-internal easily forms centrality hole; Adopt during built-in rising head and be subject to core cavity size impact, rising head is less, and feeding is not in place, and core cavity shrinkage depression is serious, causes surplus not enough; During employing exothermic riser feeding, effect is unstable, easily produces shrinkage defect in rising head lower end, exposure after processing.
Summary of the invention
The present invention, for solving the deficiencies in the prior art, provides a kind of rational in infrastructure, solution that castability is excellent difference shell class Shrinkage Porosity technique, to solve the Shrinkage Porosity problem of differential mechanism difference shell series products.
The technical solution adopted for the present invention to solve the technical problems is: a kind of solution difference shell class Shrinkage Porosity technique, comprise foundry goods, core, rising head, running channel, described foundry goods is revolving body, described core is arranged in the centre bore of revolving body, described rising head is arranged on the top of cast top and the side of rising head is pressed in the marginal position of cast top, described core upper end arranges depression, heating block is placed in depression, molten iron enters in described rising head after described running channel fills foundry goods, heating block reacts heating, make the molten iron additional heat in rising head, from top to bottom Vertical dimension feeding a casting.
Described running channel is annular.
Described running channel is arranged on outside poor shell width portion, and molten iron injects along running channel from difference shell width portion.
Compared with prior art, the invention has the beneficial effects as follows:
The mode that the present invention adopts overhead blank riser to add heating block realizes the consecutive solidification of foundry goods, make the thick large flange annular boss energy fully feeding of the annular casts such as differential mechanism difference shell class, shorten feeding distance, avoid occurring the defect such as centrality hole, inner chamber shrinkage depression, rising head lower end shrinkage porosite.
Accompanying drawing explanation
Fig. 1 is the overhead blank riser structural representation that the present invention solves poor shell class Shrinkage Porosity technique.
In figure, each label is expressed as follows:
Difference shell foundry goods 1, difference shell top 11, difference shell width portion 12, difference shell hub portion 13, core 2, rising head 3, heating block 5.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
See Fig. 1, solution difference shell class Shrinkage Porosity process application of the present invention, on differential mechanism difference shell, adopts overhead blank riser feeding technology.Comprise poor shell foundry goods 1, core 2, rising head 3, running channel (not shown), described poor shell foundry goods is revolving body, described core 2 is arranged in the centre bore of revolving body, described rising head 3 is blank risers of overhead, it is arranged on the top of cast top and the side of rising head is pressed in the marginal position of cast top, described core upper end arranges depression, heating block 5 is placed in depression, after molten iron enters rising head, heating block reacts heating, molten iron temperature is raised further and from top to bottom to feeding a casting.
Difference shell foundry goods 1 comprises poor shell top 11, difference shell width portion 12, difference shell hub portion 13, and running channel is annular, and running channel is arranged on outside poor shell width portion, and molten iron is introduced into poor shell width portion along running channel.Molten iron enters after being full of foundry goods in overhead rising head, and heating block reacts and adds heating molten steel, and can realize foundry goods vertical feeding from top to bottom, feeding effect is more satisfactory, can the compactness of basic guarantee foundry goods, even if there is shrinkage porosite also in the scope accepted.
Riser height is 90mm, is 20-21mm, lays a heating block 5 at the width of the depression (can be open slot) of core upper end.
Heating block is applicable to the thermite in foundry goods manufacture.It is the product that the riser heating and insulating such as a kind of open riser and the common rising head of sand mold covers.Heating block generation thermit reaction, it, in the heating of rising head combustion, makes the molten steel solidification time lengthening 4-5 times of rising head, and temperature retention time can reach 30 clocks thus ensure the feeding effect of foundry goods, substantially increases casting quality.
Below openly specific embodiments of the invention are only; do not form limiting the scope of the invention; for general technical staff of the technical field of the invention; do not departing under general idea prerequisite of the present invention; according to technical solution of the present invention do without the need to through the change of creative work and replacement, all should drop within protection scope of the present invention.
Claims (3)
1. one kind solves difference shell class Shrinkage Porosity technique, comprise foundry goods, core, rising head, running channel, described foundry goods is revolving body, described core is arranged in the centre bore of revolving body, it is characterized in that: described rising head is arranged on the top of cast top and the side of rising head is pressed in the marginal position of cast top, described core upper end arranges depression, heating block is placed in depression, molten iron enters in described rising head after described running channel fills foundry goods, heating block reacts heating, make the molten iron additional heat in rising head, from top to bottom Vertical dimension feeding a casting.
2. solution difference shell class Shrinkage Porosity technique according to claim 1, is characterized in that: described running channel is annular.
3. solution difference shell class Shrinkage Porosity technique according to claim 2, it is characterized in that: described running channel is arranged on outside poor shell width portion, molten iron injects along running channel from difference shell width portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514367.XA CN104999036A (en) | 2015-08-21 | 2015-08-21 | Process for solving problem of shrinkage of differential housing castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514367.XA CN104999036A (en) | 2015-08-21 | 2015-08-21 | Process for solving problem of shrinkage of differential housing castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104999036A true CN104999036A (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510514367.XA Pending CN104999036A (en) | 2015-08-21 | 2015-08-21 | Process for solving problem of shrinkage of differential housing castings |
Country Status (1)
| Country | Link |
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| CN (1) | CN104999036A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399812A (en) * | 2016-09-22 | 2017-02-15 | 浙江点铁科技有限公司 | Alloy material of planet carrier and manufacturing process of planet carrier |
| CN108856650A (en) * | 2017-05-15 | 2018-11-23 | 科华控股股份有限公司 | The accurate pre-buried location structure of the heating block of casting mould exothermic riser |
| CN109550903A (en) * | 2018-12-10 | 2019-04-02 | 中国船舶重工集团公司第十二研究所 | A kind of hot investment casting manufacturing process of thin-walled variable cross-section casting |
| CN111036854A (en) * | 2019-12-19 | 2020-04-21 | 银峰铸造（芜湖）有限公司 | Method for improving process yield of differential housing |
| CN111822658A (en) * | 2020-06-28 | 2020-10-27 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN111992670A (en) * | 2019-05-27 | 2020-11-27 | 科华控股股份有限公司 | Structure for arranging riser on feeding channel of differential casting |
| CN113680973A (en) * | 2021-09-01 | 2021-11-23 | 西峡县众德汽车部件有限公司 | Double-flow-passage volute top partition plate air hole and shrinkage porosity solving process |
| CN114378256A (en) * | 2022-03-24 | 2022-04-22 | 勤威(天津)工业有限公司 | Casting feeding process method applying small-volume high-efficiency feeding head |
| CN114535517A (en) * | 2020-11-26 | 2022-05-27 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN116765329A (en) * | 2023-07-03 | 2023-09-19 | 上海圣德曼铸造海安有限公司 | Feeding device for automobile differential shell |
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| JPH04123862A (en) * | 1990-09-14 | 1992-04-23 | Tlv Co Ltd | Method for casting |
| JPH0833946A (en) * | 1994-07-22 | 1996-02-06 | Aisin Takaoka Ltd | Mold |
| CN203184596U (en) * | 2013-05-04 | 2013-09-11 | 日月重工股份有限公司 | Casting structure used for casting die-casting machine tail board |
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2015
- 2015-08-21 CN CN201510514367.XA patent/CN104999036A/en active Pending
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| JPH04123862A (en) * | 1990-09-14 | 1992-04-23 | Tlv Co Ltd | Method for casting |
| JPH0833946A (en) * | 1994-07-22 | 1996-02-06 | Aisin Takaoka Ltd | Mold |
| CN203184596U (en) * | 2013-05-04 | 2013-09-11 | 日月重工股份有限公司 | Casting structure used for casting die-casting machine tail board |
| CN104607601A (en) * | 2013-11-05 | 2015-05-13 | 青岛齐力铸钢有限公司 | Pump body casting process |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399812A (en) * | 2016-09-22 | 2017-02-15 | 浙江点铁科技有限公司 | Alloy material of planet carrier and manufacturing process of planet carrier |
| CN108856650A (en) * | 2017-05-15 | 2018-11-23 | 科华控股股份有限公司 | The accurate pre-buried location structure of the heating block of casting mould exothermic riser |
| CN109550903A (en) * | 2018-12-10 | 2019-04-02 | 中国船舶重工集团公司第十二研究所 | A kind of hot investment casting manufacturing process of thin-walled variable cross-section casting |
| CN109550903B (en) * | 2018-12-10 | 2020-06-02 | 中国船舶重工集团公司第十二研究所 | Precision casting forming method for thin-wall variable-section casting |
| CN111992670A (en) * | 2019-05-27 | 2020-11-27 | 科华控股股份有限公司 | Structure for arranging riser on feeding channel of differential casting |
| CN111036854A (en) * | 2019-12-19 | 2020-04-21 | 银峰铸造（芜湖）有限公司 | Method for improving process yield of differential housing |
| CN111822658A (en) * | 2020-06-28 | 2020-10-27 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN111822658B (en) * | 2020-06-28 | 2022-04-15 | 江阴宏创动能科技有限公司 | Forming die of automobile exhaust manifold and implementation method thereof |
| CN114535517A (en) * | 2020-11-26 | 2022-05-27 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN114535517B (en) * | 2020-11-26 | 2024-04-12 | 中国兵器工业第五九研究所 | Forming method of revolving body casting |
| CN113680973A (en) * | 2021-09-01 | 2021-11-23 | 西峡县众德汽车部件有限公司 | Double-flow-passage volute top partition plate air hole and shrinkage porosity solving process |
| CN114378256A (en) * | 2022-03-24 | 2022-04-22 | 勤威(天津)工业有限公司 | Casting feeding process method applying small-volume high-efficiency feeding head |
| CN114378256B (en) * | 2022-03-24 | 2022-07-01 | 勤威(天津)工业有限公司 | Casting feeding process method applying small-volume high-efficiency feeding head |
| CN116765329A (en) * | 2023-07-03 | 2023-09-19 | 上海圣德曼铸造海安有限公司 | Feeding device for automobile differential shell |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151028 |