IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0608226
(1984-05-08)
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발명자
/ 주소 |
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출원인 / 주소 |
- Hazelett Strip-Casting Corp.
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대리인 / 주소 |
Parmelee, Bollinger & Bramblett
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인용정보 |
피인용 횟수 :
8 인용 특허 :
2 |
초록
▼
Methods for continuously casting metal product directly from molten metal confined and solidified in a casting region defined by upper and lower, cooled, endless, flexible, traveling, casting belts supported by belt support systems including back-up rollers in respective upper and lower carriages an
Methods for continuously casting metal product directly from molten metal confined and solidified in a casting region defined by upper and lower, cooled, endless, flexible, traveling, casting belts supported by belt support systems including back-up rollers in respective upper and lower carriages and laterally defined by first and second traveling side dams. The back-up rollers and belt support systems shape and maintain the casting region for improved heat transfer between cast metal and belts for improved product uniformity and enhanced machine performance. Several methods are disclosed including having one belt flexibly constrained, resulting in a transverse bowing away from the casting centerline due to liquid metal head, with the opposing belt being rigidly constrained and contoured or transversely bowed towards the casting centerline in a configuration that compensates for displacement of the flexibly constrained belt resulting in a uniform transverse cross section. Methods are disclosed including bowing the upper back-up rollers down either by manual adjustment or remote control and at the same time allowing the lower rollers to yield; intentionally rigidizing the upper and/or lower back-up rollers or sections thereof; bowing both sets of back-up rollers in equal and opposite directions, bowing the rollers inward or outward using either manual adjustment or remote control tensioning; bending structural frame members which are in support relationship with rollers, thus maintaining predetermined configurations of rollers in contact with the belts and further including downstream tapering of the casting region.
대표청구항
▼
1. In the method of continuously casting metal product directly from molten metal in which the molten metal is confined and solidified in a casting region defined above and below by upper and lower cooled endless, flexible, traveling, casting belts supported by a plurality of upper back-up rollers a
1. In the method of continuously casting metal product directly from molten metal in which the molten metal is confined and solidified in a casting region defined above and below by upper and lower cooled endless, flexible, traveling, casting belts supported by a plurality of upper back-up rollers and a plurality of lower back-up rollers in respective upper and lower belt carriages and laterally defined by first and second traveling side dams, the method of controlling belt shape comprising the step of: providing at least some bowable back-up rollers in both of said carriages, adjustably bowing at least some of said bowable back-up rollers in a first carriage and permitting said bowable back-up rollers in the second carriage to bow for urging the upper and lower belts toward contact with the cast metal product. 2. In the method of continuously casting metal product, the method of controlling belt shape as claimed in claim 1, including the further step of: remotely controlling the bowing of at least some of said bowable back-up rollers in said first carriage. 3. In the method of continuously casting metal product, the method of controlling belt shapes as set forth in claim 1 or 2 in which the step of adjustably bowing at least some of said bowable back-up rollers comprises: maintaining a center section of the bowable back-up rollers relatively more rigid than their end sections for shaping the casting belt and improving belt contact with the metal product being cast. 4. In the method of continuously casting metal product, the method of controlling belt shape as set forth in claim 1 or 2, wherein: bowable back-up rollers are bowed by approximately equal force-couples (bending moments) applied to respective stub-shaft levers located at each end of the bowable back-up rollers and connected to the ends of the bowable back-up rollers by bearing assemblies capable of transmitting the applied bending moments to the respective ends of these rollers. 5. In the method of continuously casting metal products, the method of controlling belt shape as set forth in claim 1, wherein: the bowable back-up rollers are slaved to transverse frame members, and the transverse frame members themselves are bowed for producing the desired bowing contour of said slaved rollers. 6. The method of controlling belt shape as claimed in claim 5, wherein: said transverse frame members are first transverse frame members each having a second transverse frame member generally parallel thereto and associated therewith, each such second transverse frame member being relatively more elastically bowable than the first frame member, and producing a bowing of the first frame member by bowing the second frame member for producing a determinate bowing of the first frame member. 7. The method of continuously casting metal product as set forth in claim 1, wherein: said casting belts are maintained generally parallel to each other along the upstream zone of the casting region, and said casting belts are converged slightly toward each other in the downstream direction in a subsequent zone of the casting region. 8. The method of continuously casting metal product as set forth in claim 7, wherein: said casting belts are converged slightly toward each other in the downstream direction in a middle zone of the casting region, and said casting belts are converged more rapidly toward each other in the downstream direction in a downstream zone of the casting region. 9. The method of casting metal product as claimed in claim 5 or 6, wherein: said casting belts are supported approximately parallel to each other in one longitudinal zone of the casting region, and said casting belts are converged toward each other in the downstream direction in a subsequent longitudinal zone of the casting region. 10. In a twin-belt continuous metal-casting machine having a pair of casting belts revolving around respective belt-supporting carriages for defining a casting region between the two belts, and wherein each of the carriages has a frame with main rolls located at opposite ends of the carriage for revolving the casting belt around the carriage, and wherein the casting belts are guided and supported by a plurality of finned back-up rollers each extending transversely against the casting belt adjacent to the casting region, the method of controlling the shape of the casting belt relative to the casting region comprising the steps of: selectively converging the casting belts toward each other for progressively narrowing the casting region from the upstream end thereof to the downstream end thereof, gradually converging the casting belts toward each other in an intermediate longitudinal zone of the casting region, and increasing the converging of the casting belts toward each other in a downstream zone located downstream from said intermediate zone.
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