CN105057597A - Process for solving shrinkage problem of circular bead R of top face of brake drum - Google Patents
Process for solving shrinkage problem of circular bead R of top face of brake drum Download PDFInfo
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- CN105057597A CN105057597A CN201510514343.4A CN201510514343A CN105057597A CN 105057597 A CN105057597 A CN 105057597A CN 201510514343 A CN201510514343 A CN 201510514343A CN 105057597 A CN105057597 A CN 105057597A
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- brake drum
- rising head
- casting
- molten iron
- foundry goods
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Abstract
The invention discloses a process for solving the shrinkage problem of a circular bead R of the top face of a brake drum. The process comprises a sand core, a dead head and a sprue. A casting is a revolving body, and the sand core is arranged in a center hole of the revolving body. The dead head is arranged on the top of a cavity of the casting, and presses the cavity of the casting and the sand core. A concave portion is formed in the upper end of the sand core and communicated with the dead head, and heating blocks are placed in the concave portion. Molten iron is injected into the casting through the sprue and then enters the dead head, the heating blocks react to heat, so that heat is supplemented to the molten iron in the dead head, and the casting is fed from top to bottom. Feeding of the top face of the brake drum is achieved through the mode of placing the heating blocks in the pressing edge dead head. The heating blocks are placed in the dead head of the casting, the heating blocks react to heat the molten iron, and the top face of the casting can be fed through the high-temperature molten iron in the pressing edge dead head; the feeding distance can reach the circular bead, and shrinkage of the circular bead can be reduced to the acceptable first grade or second grade or even eliminated.
Description
Technical field
The present invention relates to auto parts and components and accessory manufacturing technology field, more particularly, relate to the technique solving brake drum end face R angle shrinkage porosite.
Background technology
Brake drum series products is mostly annular cast, and structure is comparatively simple, but easily occurs shrinkage defect (see Fig. 1 label A pointed location) at end face fillet place, then can not use more than three grades of shrinkage porosites.At present, usually adopt the side riser slightly higher than foundry goods to carry out feeding, when side riser feeding less than adopt cooling muscle to carry out Quench to thermal center position, but all there is unstable phenomenon in above-mentioned two schemes.
Summary of the invention
The present invention, for solving the deficiencies in the prior art, provides the technique of a kind of rational in infrastructure, solution brake drum end face R angle shrinkage porosite that castability is excellent, to solve the shrinkage porosite problem that brake drum class cast product end face comprises fillet etc.
The technical solution adopted for the present invention to solve the technical problems is: a kind of technique solving brake drum end face R angle shrinkage porosite, comprise 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 at foundry goods die cavity top, described rising head is pressed on foundry goods die cavity and core, described core upper end arranges depression, depression is communicated with rising head, 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 to feeding a casting.
Described rising head is ring-type, at uniform three heating blocks of the depression inner periphery of core.
Described heating block is obtained by thermite.
Described running channel is arranged on outside the cylindrical bulge loop of brake drum, and the cylindrical bulge loop of molten iron along running channel from brake drum injects.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adopts the mode of blank riser built-in heating block to realize the feeding of grey foundry goods brake drum end face.In the rising head of foundry goods, place heating block, heating block reacts and adds heating molten steel, and the high temperature liquid iron in blank riser can realize the feeding to foundry goods end face, and feeding distance can reach fillet place, fillet place shrinkage porosite can be made to be reduced to acceptable 1-2 level and even disappear.
Accompanying drawing explanation
Fig. 1 is the dead head structure schematic diagram that the present invention solves the technique of brake drum end face R angle shrinkage porosite.
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, the invention provides a kind of technique solving brake drum end face R angle shrinkage porosite, comprise core 2, rising head 3, running channel (not shown), foundry goods is revolving body, core is arranged in the centre bore of revolving body, rising head is arranged on the top at foundry goods die cavity 1 top, rising head 3 is pressed on foundry goods die cavity 1 and core 2, core upper end arranges depression, and depression is communicated with rising head, in depression, place heating block 4, molten iron enters in rising head after running channel fills foundry goods, heating block reacts heating, makes the molten iron additional heat in rising head, from top to bottom to feeding a casting.
Rising head 3 is ring-types, at uniform three heating blocks of the depression inner periphery of core.Heating block is obtained by thermite.Running channel is arranged on outside the cylindrical bulge loop 11 of brake drum, and the cylindrical bulge loop 11 of molten iron along running channel from brake drum injects.
Rising head is blank riser, installs the cuboid of a wide 21* of long 41* thick 10 in the below of blank riser.On sand mold, then form the groove of an above-mentioned size after moulding, three heating blocks are placed in three grooves.During cast, molten iron enters in blank riser after being full of foundry goods, and heating block reacts and adds heating molten steel, and the high temperature liquid iron in blank riser can realize the feeding to foundry goods end face, feeding distance can reach fillet place, fillet place shrinkage porosite can be made to be reduced to acceptable 1-2 level and even disappear.
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 (4)
1. one kind solves the technique of brake drum end face R angle shrinkage porosite, comprise 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 at foundry goods die cavity top, described rising head is pressed on foundry goods die cavity and core, described core upper end arranges depression, depression is communicated with rising head, placement heating block in depression, molten iron enters in described rising head after described running channel fills foundry goods, and heating block reacts heating, make the molten iron additional heat in rising head, from top to bottom to feeding a casting.
2. the technique of solution brake drum end face R angle according to claim 1 shrinkage porosite, is characterized in that: described rising head is ring-type, at uniform three heating blocks of the depression inner periphery of core.
3. the technique of solution brake drum end face R angle according to claim 2 shrinkage porosite, is characterized in that: described heating block is obtained by thermite.
4. the technique of the solution brake drum end face R angle shrinkage porosite according to Claims 2 or 3, is characterized in that: described running channel is arranged on outside the cylindrical bulge loop of brake drum, and the cylindrical bulge loop of molten iron along running channel from brake drum injects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514343.4A CN105057597B (en) | 2015-08-21 | 2015-08-21 | The technique for solving brake drum top surface R angles shrinkage porosite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510514343.4A CN105057597B (en) | 2015-08-21 | 2015-08-21 | The technique for solving brake drum top surface R angles shrinkage porosite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105057597A true CN105057597A (en) | 2015-11-18 |
| CN105057597B CN105057597B (en) | 2017-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510514343.4A Active CN105057597B (en) | 2015-08-21 | 2015-08-21 | The technique for solving brake drum top surface R angles shrinkage porosite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000288685A (en) * | 1999-04-12 | 2000-10-17 | Hodogaya Ashland Kk | Manufacture of sleeve for feeder head |
| CN2905267Y (en) * | 2006-03-14 | 2007-05-30 | 张敏 | Composite type heat-insulation heating casting head envelope structure |
| CN201779184U (en) * | 2010-09-07 | 2011-03-30 | 江苏金石铸锻有限公司 | Phi640 brake disc for coaches |
| CN103317100A (en) * | 2012-03-21 | 2013-09-25 | 中集车辆（集团）有限公司 | Method for manufacturing ductile iron hub |
-
2015
- 2015-08-21 CN CN201510514343.4A patent/CN105057597B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000288685A (en) * | 1999-04-12 | 2000-10-17 | Hodogaya Ashland Kk | Manufacture of sleeve for feeder head |
| CN2905267Y (en) * | 2006-03-14 | 2007-05-30 | 张敏 | Composite type heat-insulation heating casting head envelope structure |
| CN201779184U (en) * | 2010-09-07 | 2011-03-30 | 江苏金石铸锻有限公司 | Phi640 brake disc for coaches |
| CN103317100A (en) * | 2012-03-21 | 2013-09-25 | 中集车辆（集团）有限公司 | Method for manufacturing ductile iron hub |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105057597B (en) | 2017-07-07 |
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