CN1406668A - Raymond mill hammer and casting process thereof - Google Patents
Raymond mill hammer and casting process thereof Download PDFInfo
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- CN1406668A CN1406668A CN 01126572 CN01126572A CN1406668A CN 1406668 A CN1406668 A CN 1406668A CN 01126572 CN01126572 CN 01126572 CN 01126572 A CN01126572 A CN 01126572A CN 1406668 A CN1406668 A CN 1406668A
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Abstract
A grinding hammer for Raymond mill features that it contains an internally embedded steel ring for taking the role of internal cooling and absorbing heat and when it is cast, with upper middle, and lower moulds, the middle and lower moulds are metallic cones. Its advantages are fine crystal grains, compact structure, high mechanical performance, high antiwear nature and long service life.
Description
Technical field: the present invention relates to a kind of manufacturing technology of grinding machine mill hammer parts, particularly a kind of Raymond mill hammer and casting method thereof.
Background technology: the existing mine ore (as pyrophillite etc.) that is used for carries out the grinding machine of grinding processing especially at Raymond mill, the mill hammer (for alloy cast steel spare) that is used for abrading-ball (or grinding roller) usefulness belongs to a kind of consumable accessory, when cause rubs with hard ore extrusion, surface abrasion is fast, the life-span is short, learies is very big, can greatly increase dealer's processing cost.But big primary (also the being most important) reason of mill hammer consumption is to utilize due to old-fashioned traditional casting technique.Traditional process is: the material of mill hammer is alloy steel casting structure (about the about 90kg of substance), when casting its upper, middle and lower pattern all use sand mold (mould) casting (in, anvil swage can be merged into an anvil swage and use), because steel casting surface is long-pending little, radiating surface is little, the cast after coagulation is slow, cause casting (steel) part shrinkage cavity problem to be difficult to solve, even the very big shrinkage cavity problem that also is difficult to solve fully mill hammer steel-casting that appetite (dead head) diameter will be done.In addition, also there is yield rate low (only reaching about 60% approximately) in conventional cast technology, sand using amount is big, workpiece exodermis hardness is low, wears no resistance, and these have all had a strong impact on the service life of Raymond mill mill hammer workpiece, have strengthened the production and processing cost.
Summary of the invention: the objective of the invention is to overcome above-mentioned defective, thereby design a kind of Raymond mill hammer and casting method thereof of novel structure.Make the mill hammer steel-casting that casts out to solve the shrinkage cavity problem substantially, and can improve yield rate (yield rate), improve its exodermis (superficial layer) hardness, strengthen wearability, increase the service life.The technical solution that the present invention adopts is as follows: this mill hammer is that the steel-casting of raw material is made by high-carbon steel still, it is characterized in that being embedded with in the inside of the mill hammer foundry goods that is cast out an outer ledge interior cold steel loop (also claiming iron hoop) equidistant and can play inner Quench heat-absorbing action when pouring into a mould of hammering into shape with mill.Method when this mill hammer is cast comprises the steps: still that pattern manufacturing preparations-pattern spray paint-pattern preheating-lower mold core (core or metal-cored)-clear type and mould assembly-cast-open form (also claiming somatotype or unpacking) get that foundry goods-chipping (removing dead head, overlap)-quality inspection is qualified must finished product cast, wherein used pattern has the upper, middle and lower pattern, in it is characterized in that, anvil swage is to adopt metal pattern (also claiming metal mold) to pour into a mould casting, to form the effect that molten metal (molten steel) foundry goods is played the Quench heat radiation from the outside.Compared with the prior art, the present invention is owing to use metal mold (being metal pattern) cast casting instead, and can produce following beneficial effect: the metal mold cooling velocity is fast, has (outward) chill effect.Behind cold steel (iron) ring, molten metal (molten steel) is also produced interior Quench endothermic effect in particularly being built-in with in the steel-casting, the heat radiation film-cooled heat is increased.The effect of the inside and outside Quench of above-mentioned generation, make casting crystalline grain refinement, dense structure, no shrinkage cavity phenomenon, thereby improved the mechanical property of foundry goods, make the exodermis hardness of mill hammer foundry goods greatly improve (can improve 15%-20%), strengthen wearability, prolonged service life, can also improve the dimensional accuracy of foundry goods, improve the yield rate of cast, and steady quality.In addition, also have sand using amount few, few during the moulder, because of metal pattern die fast to cooling velocity of casting, reduced the feeding that the reply foundry goods carries out, make corresponding the reducing of dead head size (can reduce 50%-60%) of foundry goods, it is many to allow liquid metals (molten steel) utilization rate improve, and above various advantages, 25-30% can reduce production costs.
Description of drawings:
Fig. 1 is the structural representation that the present invention adopts metal pattern die to cast.
Fig. 2 is the structural representation of mill hammer of the present invention.
Wherein: the anvil swage (base mold) of 1-metal pattern (also claiming metal mold), the middle pattern of 2-metal pattern, 3-mill hammer (also claims abrading-ball, grinding roller, be arranged in die cavity), cold steel (iron) ring in the 4-(with the same material of mill hammer), 5-core (core rod), 6-dead head, 7-sand mold mould (top swage), 8-sand frame (cope).
The specific embodiment: with reference to accompanying drawing, the present invention also has following technical characterictic in the specific implementation.
One, the material of interior cold steel (iron) ring 4 materials of being buried underground in mill hammer steel-casting inside should be hammered the material consistent (as being all high-carbon alloy steel) of casting (steel) part material with mill into shape.
Two, when carrying out lower mold core (being core) step, also be built-in with interior cold steel (iron) ring 4 that can be convenient to allow molten steel (molten metal) after the cast play Quench heat absorption usefulness internally in the die cavity (cast inner chamber) of middle pattern in advance, the material that material material of cold steel (iron) ring 4 and mill hammer are cast (steel) part material in this is consistent.
Three, in, the used metal mold of mo(u)ld bottom half is to be the swage of steel or cast iron with the ferrous metal type, when in casting, carrying out the pattern preheating step, its preheat temperature is chosen between 130-180 ℃, molten metal when pouring into a mould step (high carbon alloy molten steel) temperature is grasped and is poured into a mould between 1400-1450 ℃, and casting process should be poured into a mould by elder generation's fast slow again step in slow back.
Four, described anvil swage 1 as the base pattern still can use traditional sand mold mould to pour into a mould casting.
Five, also can follow as the sand mold mould 7 of top swage in the described pattern in, anvil swage equally uses metal pattern instead and pours into a mould casting.
Claims (7)
1, a kind of Raymond mill hammer is that the steel-casting of raw material is made by high-carbon steel, it is characterized in that being embedded with in the inside of mill hammer (3) foundry goods an interior cold steel loop (4) that also can play inner Quench heat-absorbing action equidistant with the outer ledge of mill hammer (3).
2, grinding machine mill hammer according to claim 1 is characterized in that in the material of inner interior cold steel loop (4) material of being buried underground of mill hammer (3) consistent with the material of mill hammer material.
3, a kind of casting method of Raymond mill hammer as claimed in claim 1, its casting method comprises the steps: that pattern manufacturing preparation-pattern spray paint-pattern preheating-lower mold core (core or metal-cored)-clear type and mould assembly-cast-open form get that foundry goods-chipping (removing to water appetite, overlap)-quality inspection is qualified must finished product cast, wherein used pattern has the upper, middle and lower pattern, in it is characterized in that, anvil swage is to adopt metal pattern (also claiming metal mold) to pour into a mould casting, to form the effect that the molten metal foundry goods is played the Quench heat radiation from the outside.
4, the casting method of grinding machine mill hammer according to claim 3, it is characterized in that when carrying out lower mold core (core) step, also be built-in with the interior cold steel loop (4) that can be convenient to allow molten steel after the cast play Quench heat absorption usefulness internally in the die cavity of middle pattern (2), material material of cold steel loop is consistent with the material of mill hammer (3) casting material in this.
5, the casting method of grinding machine mill hammer according to claim 3, in it is characterized in that, the used metal pattern of mo(u)ld bottom half is the swage with steel or cast iron, when in casting, carrying out the pattern preheating step, its preheat temperature is chosen between 130-180 ℃, the molten metal temperature is grasped and is poured into a mould between 1400-1450 ℃ when pouring into a mould step, and casting process should be poured into a mould by elder generation's fast slow again step in slow back.
6, the casting method of grinding machine mill hammer according to claim 3 is characterized in that described anvil swage as the base pattern (1) still can use traditional sand mold mould to pour into a mould casting.
7, the casting method of grinding machine according to claim 3 mill hammer is in it is characterized in that in the described pattern also can following as the sand mold mould (7) of top swage, anvil swage equally uses metal pattern instead and pour into a mould casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126572 CN1286569C (en) | 2001-08-26 | 2001-08-26 | Raymond mill hammer and casting process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126572 CN1286569C (en) | 2001-08-26 | 2001-08-26 | Raymond mill hammer and casting process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1406668A true CN1406668A (en) | 2003-04-02 |
| CN1286569C CN1286569C (en) | 2006-11-29 |
Family
ID=4666584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01126572 Expired - Fee Related CN1286569C (en) | 2001-08-26 | 2001-08-26 | Raymond mill hammer and casting process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1286569C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294467A (en) * | 2011-07-28 | 2011-12-28 | 徐州胜海机械制造科技有限公司 | Method for producing large-sized cast |
| CN104043789A (en) * | 2014-07-01 | 2014-09-17 | 广东省工业技术研究院(广州有色金属研究院) | Preparation method of grinding roller |
| CN106756439A (en) * | 2016-12-05 | 2017-05-31 | 安徽永川电气设备有限公司 | A kind of low chrome casting switch cubicle condensation tube preparation method |
-
2001
- 2001-08-26 CN CN 01126572 patent/CN1286569C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294467A (en) * | 2011-07-28 | 2011-12-28 | 徐州胜海机械制造科技有限公司 | Method for producing large-sized cast |
| CN104043789A (en) * | 2014-07-01 | 2014-09-17 | 广东省工业技术研究院(广州有色金属研究院) | Preparation method of grinding roller |
| CN106756439A (en) * | 2016-12-05 | 2017-05-31 | 安徽永川电气设备有限公司 | A kind of low chrome casting switch cubicle condensation tube preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1286569C (en) | 2006-11-29 |
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Granted publication date: 20061129 Termination date: 20100826 |