CN1401448A - Near finished shape sections roller casting method - Google Patents
Near finished shape sections roller casting method Download PDFInfo
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- CN1401448A CN1401448A CN 02132906 CN02132906A CN1401448A CN 1401448 A CN1401448 A CN 1401448A CN 02132906 CN02132906 CN 02132906 CN 02132906 A CN02132906 A CN 02132906A CN 1401448 A CN1401448 A CN 1401448A
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- Prior art keywords
- roller
- casting
- mould
- finished shape
- shape sections
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Abstract
A method for casting the roller whose surface shape is similar to the final shape of the rolled section is characterized by that its casting mould is composed of the mould for main part and the sand box for roller handle. Said mould for main part consists of external sleeve and detachable internal bush segmented axially.
Description
Technical field
The invention belongs to the metal casting technology, particularly a kind of casting method that can obtain near final physical dimension section roll.
Background technology
The manufacture method of present section roll, be elder generation's machining after casting, and because the contraction in the casting cooling procedure very easily causes stress to concentrate crackle, therefore the groove on section roll surface, the general equal directly cast form of rib part, and realize by follow-up a large amount of machinings, not only cause a large amount of losses of metal material, and consume a large amount of energy, man-hour; In order to yield to the feasibility of mechanical processing technique, often sacrifice the hardness of roll, so that reduced anti-wear performance, perhaps increase heat treatment step repeatedly for improving processing characteristics, increased manufacturing cost greatly.
Summary of the invention
For solving the problems referred to above that exist in the existing production technology of section roll, the present invention proposes the method for near finished shape sections roller casting, to realize that directly casting obtains the section roll near the physical dimension that required, and only needs a small amount of machining can finish the production of section roll.
The main points of its invention are to solve to avoid in the casting cooling concentrating because of contraction causes stress, and like this, section roll surface groove, rib just can the while castings.
The present invention combines as casting mold with metal molding die of roller footpath portion (being called for short roller footpath mould) and roller shank sandbox (being called for short roller handle sandbox), be characterized in roller footpath mould by overcoat and removable in cover form, said interior cover prolongs axial segmentation and combines, be provided with between the cover in two sections and shrink joint, inside and outside cover is and is slidingly matched.
Mould with the said method making, in the cast cooling procedure, the groove of molding roller, rib part can be because of the axial shrinkage of roller footpath metal die restriction roll, and cause bigger stress to concentrate, therefore, the casting geomery of section roll can be designed poling near its final designing requirement, only need a small amount of machine cut processing of process or only grind processing, can finish the production of section roll.Not only save lot of materials, improve work efficiency, and improve the quality of products effectively.
Description of drawings
Fig. 1 has the roller footpath forming die structure schematic diagram of the section roll of groove for casting surface of the present invention.
The specific embodiment
As shown in Figure 1, the roller of molded shapes roll of the present invention footpath mould by metal-coating and removable in cover 2 forms, interior cover 2 prolongs two sections combinations of axial branch, is provided with between the cover in two sections and shrinks joint 3, interior cover 2 and overcoat 1 are and are slidingly matched.
Described contraction joint 3 adopts organic resin sand to make.Its best axial width is B+L * a, and in the formula: L is the distance of two grooves or rib center line on the roll, and a is the free linear shrinkage ratio of roll material, when L＞500mm, and B=20, when L≤500, B=25.
Use the casting method of the utility model mould to be:
At first cover 2 usefulness fixed heads 4 in the mould are connected that to be fixed into the garden of matching with overcoat 1 barrel-shaped, cover and middle contraction save 3 and pack into successively in the overcoat 1 in two sections then.When adopting direct casting, roller footpath mould and the roller handle sandbox that assembles is assembled together, fixing, put into melt pit, alloy liquid is injected into pattern by cast gate.When cooling is shunk, under the shrinkage stress effect, shrink joint and squeezed brokenly, cover 2 displacements with the contraction of foundry goods in the axial direction in can making promptly can not cause bigger stress to concentrate and ftracture at roller footpath groove.
Embodiment 1:
Directly casting is produced section roll, at first be fixed into round barrel shape, pack into successively in the die coat since one with each several part then, and be fixed applying mechanically fixed head in the mould, the mould that assembles is assembled with roller handle sandbox, fixing, lock, put into melt pit, alloy liquid is poured in the casting mold mould by cast gate, till alloy liquid is full of, treat that alloy is finished to solidify to be cooled to uniform temperature, respectively mould is taken apart roll is taken out.The allowance of knurling and rib is 0.5mm, reduces 92% more originally, and machining period 3 hours subtracted 31 hours more originally, and production cost reduces by 65%.
Embodiment 2: centre spinning is produced section roll, roller footpath mould assembling process is the same, with the roller footpath mould that assembles, directly crouching is placed on the centrifugal casting machine, and the alloy liquid that can form 50mm thickness pours in the mould, treating that alloy liquid solidifies is cooled to 950 °, mould is taken off from centrifuge, and quick and roller handle sandbox is assembled together, and pours into roller core alloy (magnesium iron) until being full of, treat to solidify fully, mould is pulled down the taking-up roll to uniform temperature.The allowance of knurling and rib is 0.4mm, reduces 95% more originally, and machining period 5 hours reduced 60 hours more originally, and production cost reduces by 75%.
Claims (3)
1. the method for a near finished shape sections roller casting, be to combine as casting mold with roller footpath mould and roller handle sandbox, it is characterized in that roller footpath mould by overcoat (1) and removable in overlap (2) and form, interior cover (2) prolongs axial segmentation and combines, be provided with between the cover in two sections and shrink joint (3), interior cover (2) is with overcoat (1) and is slidingly matched.
2. the method for a kind of near finished shape sections roller casting according to claim 1 is characterized in that described contraction joint (3) adopts organic resin sand to make.
3. according to the method for claim 1,2 described a kind of near finished shape sections roller castings, the best axial width that it is characterized in that described contraction joint is B+L * a, in the formula: L is the distance of two grooves or rib center line on the roll, a is the free linear shrinkage ratio of roll material, when L＞500mm, B=20, when L≤500, B=25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021329060A CN1302873C (en) | 2002-09-09 | 2002-09-09 | Near finished shape sections roller casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021329060A CN1302873C (en) | 2002-09-09 | 2002-09-09 | Near finished shape sections roller casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401448A true CN1401448A (en) | 2003-03-12 |
| CN1302873C CN1302873C (en) | 2007-03-07 |
Family
ID=4746982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021329060A Expired - Fee Related CN1302873C (en) | 2002-09-09 | 2002-09-09 | Near finished shape sections roller casting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1302873C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450667C (en) * | 2007-03-17 | 2009-01-14 | 中国第一重型机械集团公司 | Sliding roll neck casting mould method in use for casting large supporting roller of integral casting cast steel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3520815A1 (en) * | 1985-06-11 | 1986-12-11 | INA Wälzlager Schaeffler KG, 8522 Herzogenaurach | CLUTCH RELEASE BEARING AND METHOD FOR THE PRODUCTION THEREOF |
| CN1017317B (en) * | 1989-08-03 | 1992-07-08 | 江西赣江机械厂 | Casting process of wheel-drum parts with flange edge |
| DE4027225C2 (en) * | 1990-08-24 | 1993-12-16 | Mannesmann Ag | Process for the production of a supporting and guiding roller of a continuous caster |
| CN1036179C (en) * | 1993-12-03 | 1997-10-22 | 合肥钢铁公司 | Method of production of cast steel roller and its special casting metal mould |
| JP3614954B2 (en) * | 1995-10-24 | 2005-01-26 | 本田技研工業株式会社 | Cast wheel and its manufacturing method |
| CN1140112A (en) * | 1996-05-10 | 1997-01-15 | 河北省沧州机械厂 | Centrifugal casting and moulding technique for screw of screw oil extruder |
| CN1074951C (en) * | 1997-01-10 | 2001-11-21 | 北京科技大学 | Roller vacuum sealing moulding technique |
-
2002
- 2002-09-09 CN CNB021329060A patent/CN1302873C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450667C (en) * | 2007-03-17 | 2009-01-14 | 中国第一重型机械集团公司 | Sliding roll neck casting mould method in use for casting large supporting roller of integral casting cast steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1302873C (en) | 2007-03-07 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |