RU2506140C1 - Continuous casting machine die - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy, particularly, to continuous metal casting. Proposed die comprises housing 1, sleeve 2, upper sealing cover 3, lower cover 4, circulation jacket 6 composed by thin-wall pipe. Circulation jacket and sleeve are arranged equidistantly. Adjustable thrusts 7 are arranged at upper sealing cover to center circulation jacket relative to copper sleeve. In teeming uniform clearance is formed between said sleeve and circulation jacket to rule out the contact between jacket elements and sleeve at thermal expansion of the latter, sleeve warpage and distortion of geometrical sizes of its working surfaces.

EFFECT: higher quality of castings and process efficiency.

2 dwg

Description

The invention relates to metallurgy, and in particular to continuous metal casting machines.

Known mold continuous metal casting machine, containing a sleeve mounted in the housing between the upper and lower sealing covers [1]. To cool the sleeve around it with a clearance for the passage of cooling water, a circulation jacket is installed.

A disadvantage of the known mold is that no means are provided to ensure uniform clearance between the sleeve and the jacket, as a result, it is not possible to provide uniform cooling of the sleeve and to obtain a high-quality workpiece.

A known mold for the installation of continuous casting of metals, containing a sleeve mounted in the housing between the upper and lower sealing covers [2]. To cool the sleeve around it with a clearance for the passage of cooling water, a circulation jacket is installed. To create a uniform gap between the sleeve and the jacket along the perimeter of the latter, protrusions are made facing the sleeve.

The main disadvantage of this mold is that during continuous casting, the mold sleeve heats up and undergoes thermal expansion. As a result of expansion on the sleeve in the places of contact with the protrusions of the circulation jacket, dents are formed, which warp the sleeve and distort the geometry of its working surfaces, which leads to defects in the continuously cast billet and disruption of the casting process.

The technical result of the invention is:

- ensuring a uniform gap between the sleeve and the circulation jacket,

- the exclusion of the possibility of contact between the elements of the circulation jacket and the sleeve during thermal expansion of the latter.

Thereby:

- provides high quality cast billets,

- increases the performance of the continuous casting process.

The technical result is achieved by the fact that in the mold of a continuous metal casting machine, comprising a housing with upper and lower sealing caps, a circulation jacket fixed in the housing between the cap covers and made in the form of a thin-walled tube with fixing elements in the vertical direction and centering elements relative to the sleeve in the transverse direction while the centering elements of the circulation jacket in the transverse direction are made in the form of adjustable stops fixed to the upper seal tnitelnoy cover and associated with the outer surface of the circulating jacket and circulating jacket arranged equidistantly relative to the sleeve.

The invention is illustrated by graphic materials, where:

figure 1 shows a longitudinal section of the proposed mold;

figure 2 is a section aa.

The mold consists of a housing 1, a sleeve 2, mounted in the housing 1 using the upper 3 and lower 4 sealing covers. Around the sleeve 2 with a certain gap 5 is equidistantly installed and secured in the housing 1 circulation jacket 6, made in the form of a thin-walled pipe. Since the inner surface of the circulation jacket is equidistant from the outer surface of the sleeve, a uniform gap between the sleeve and the circulation jacket is ensured. For proper installation of the jacket 6 relative to the sleeve 2, adjustable stops 7 are installed on the top cover 3 with set screws 8. Slots 9 are made on the ends of the circulation jacket 6 for the passage of cooling water. There is a horizontal partition 10 in the mold housing 1, separating the mold into two chambers, the upper 11 and lower 12. A seal 13 is installed between the horizontal partition 10 and the circulation jacket 6. Cooling water is supplied through the nozzle 14 to the lower chamber 12, the waste water is discharged from the upper chamber 11 I through the pipe 15.

Assembly of the mold is as follows. On the assembly stand, the top cover 3 is installed upside down, the upper part of the sleeve 2 is fixed on it. Around the sleeve 2 is installed a circulation shirt 6. The gap 5 between the sleeve and the shirt is set with special probes (not shown) in its upper and lower parts. The circulation shirt is fixed in its upper part with adjustable stops 7, after which the probes in the upper part of the shirt are removed. Next, install the mold body 1 with a horizontal partition 10 and connect it to the top cover 3 using bolted connections, then install a seal 13 between the circulation jacket 6 and the horizontal partition 10 of the housing 1, remove the lower probes. At the final stage of assembly, install the bottom cover 4, connect it to the housing 1 and seal the sleeve 2 in it, turn the mold into a working position.

During operation of the mold, cooling water through the pipe 14 enters the lower chamber 12 through the lower end slots 9 of the circulation jacket 6 into the gap 5 between the jacket and the sleeve 2, cooling the latter. Waste water passes through the upper end slots 9 into the upper chamber 11 and is removed through the pipe 15.

During the casting process, the sleeve 2 heats up and undergoes thermal expansion. When casting billets with a diameter of 140 mm, the thermal expansion is 0.25-0.35 mm, and when casting billets with a diameter of 600 mm, 1.0-1.5 mm. The size of the gap 5 is set almost the same 3.5-4.0 mm for all sizes of workpieces.

The circulation jacket 6 is washed from all sides by cooling water, the temperature of which does not exceed 30 ° C, and has no thermal expansion. When assembling the circulation jacket 6 is fixed using adjustable stops 7 located on its outer side. Stops 7 hold the jacket 6 and during casting, ensuring the constancy of the gap 5 around the perimeter along the entire length of the sleeve.

In the gap 5 between the jacket 6 and the sleeve 2 there are no structures that prevent the thermal expansion of the latter. The equidistant placement of the shirt 6 relative to the sleeve 2 is maintained, therefore, remains uniform along the perimeter and the size of the gap 5, along which there is cooling water. The liner cools evenly. As a result, warpage of the sleeve, distortion of the geometry of its working surfaces are excluded, high quality of the workpiece is ensured, the casting process proceeds stably, the performance of the continuous metal casting machine increases.

Information sources

1. SU No. 556887, B22D 11/04, 1975. Crystallizer for continuous casting machines. Simonov V.P., Surin E.V., Matveev V.V., Khaidarov R.Kh., Ivanov V.I., Ugodnikov A.L., Soloviev Yu.P.

2. SU No. 667322, B22D 11/04, 1979. A mold for continuous metal casting plants. Ugodnikov A.L. Matveev V.V. Khaidarov R.Kh. Surin E.V.

Claims (1)

A mold of a continuous metal casting machine, comprising a housing with upper and lower sealing caps, a circulation jacket fixed in the housing between the caps and a thin-walled tube with vertical locking elements and centering elements relative to the liner in the transverse direction, characterized in that the centering elements the circulation jacket in the transverse direction is made in the form of adjustable stops fixed to the upper sealing cover and mating with the outer surface of the circulation shirt, while the circulation shirt and sleeve are placed equidistantly.

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