Continuous casting machine with forging and pressing device
By setting up a multi-directional forging device on the continuous casting machine, the high-temperature continuous casting billets are subjected to alternate radial forging, which solves the problem of the central defect of the continuous casting billets and achieves high-quality production of large-scale billets.
Patent Information
- Application Number
- CN202421665993.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-14
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-14
AI Technical Summary
Continuous cast steel billets are prone to shrinkage center defects during cooling, especially in the production of large-scale billets. These defects will cause the billet to crack and affect product quality and production efficiency.
A continuous casting machine equipped with forging device is designed, and a multi-directional forging device is provided on the periphery of the high-temperature continuous casting billet, and the billet is alternately forged and radial forged through the hydraulic cylinder and the forging head to eliminate the cold shrinkage defect.
Through multi-directional forging, the central defects in the condensation process of continuous casting steel billets can be effectively eliminated, the quality and specifications of steel billets can be maximized, and the problem of cold shrinkage defects of large-scale continuous casting steel billets can be solved.
Smart Images
Figure CN222856678U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a continuous casting machine, in particular to a continuous casting machine which performs forging during the solidification process of the continuous casting steel billet to eliminate the shrinkage center defect of the continuous casting steel billet, and belongs to the technical field of mechanical design and manufacturing. Background Art
[0002] Steel casting is the basic process of steel production, usually using two methods: die casting and continuous casting. Die casting is to pour molten steel into a mold to cool and solidify into a billet. One mold can only cast one billet at a time, and the production cycle is long. It is only suitable for small batches and special billet production. The advantages are simple equipment and small investment. The disadvantages are low yield rate, serious segregation, high unit cost and low efficiency. Continuous casting is to continuously inject molten steel into a crystallizer and solidify it into a continuous casting billet through a water-cooled crystallizer. It is suitable for large-scale and standardized production. The advantages are high efficiency and high degree of automation. The disadvantage is that it is easy to have central defects such as looseness and shrinkage. These defects become more serious as the diameter of the casting increases. With the continuous increase in the demand and specifications of billets, continuous casting becomes particularly important. Therefore, the traditional continuous casting process should be improved to adapt to the market demand for large-scale, high-quality cast steel billets. Summary of the invention
[0003] In order to solve the problems existing in the background technology, the utility model proposes a continuous casting machine equipped with a forging device, in which a forging device is arranged on the periphery of the formed continuous casting billet to perform multi-directional forging on the billet during the continuous casting process to eliminate the shrinkage defect of large-sized continuous casting billets.
[0004] In order to achieve the above-mentioned purpose, the utility model designs the following technical scheme: a continuous casting machine provided with a forging device, comprising a continuous casting machine, which includes a crystallizer and a straightening device, in which molten steel is crystallized and cooled into a high-temperature continuously cast steel billet in the crystallizer, and the straightening device pulls out the high-temperature continuously cast steel billet, characterized in that:
[0005] A forging device is arranged on the periphery of the high temperature continuous casting steel billet;
[0006] The forging device comprises a foundation, a bracket, and a forging assembly;
[0007] The support is arranged on a foundation;
[0008] The forging assembly is fixed on the bracket, and each forging assembly includes a hydraulic cylinder and a forging head, and the forging head is fixedly connected to the piston rod of the hydraulic cylinder to radially forge the high-temperature continuous casting steel billet;
[0009] Every two forging assemblies radially symmetrically arranged about the high-temperature continuous casting steel billet constitute a ram group, and the ram groups are arranged in two groups; the two forging rams in each ram group forge the high-temperature continuous casting steel billet radially relative to each other, and the forging rams in the two ram groups forge the high-temperature continuous casting steel billet alternately.
[0010] Preferably, the axes of the forging heads in each set of forging heads coincide with each other, the axes of the two sets of forging heads are in the same plane, and the axes of adjacent forging heads form an angle of 90° with each other.
[0011] Furthermore, the pressing amount of the forging head is 8%-12% of the maximum cross-sectional dimension of the steel billet, and the pressing length each time is ≥50% of the maximum cross-sectional dimension of the steel billet.
[0012] Preferably, the forging device is arranged in a region where the surface temperature of the steel billet is 850--900°C and the core temperature is 1150--1250°C.
[0013] The utility model sets an extrusion device on the periphery of the high-temperature continuous casting steel billet, aiming to solve the problem of cold shrinkage defects in the core of the large-sized continuous casting steel billet during the cooling process. In the continuous casting production process of extra-large or large-sized steel billets, the residual heat temperature inside the steel billet always exceeds the surface temperature, and the steel billet is gradually cooled by traction. Two sets of forging heads are used at the part where the core of the steel billet is about to crack due to cold shrinkage, and the steel billet casting is squeezed in turn, so that the central defects of the high-temperature continuous casting steel billet are forged in time, thereby realizing the maximization of the production specifications of the continuous casting steel billet.
[0014] The utility model has the advantages of novel design, reasonable structure and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Attached Figure 1 , 2 , 3, and 4 are schematic diagrams of the implementation of the vertical continuous casting machine.
[0016] Attached Figure 1 This is the main structure diagram.
[0017] Attached Figure 2 For attachment Figure 1 AA section structure diagram in the initial state,
[0018] Attached Figure 3 This is the AA section structure diagram of the hydraulic cylinders c and d in working state.
[0019] Attached Figure 4 It is a schematic diagram of the AA cross-section structure of hydraulic cylinders a and b in working state.
[0020] Attached Figure 5 , 6 , 7 and 8 are schematic diagrams of the implementation of the horizontal continuous casting machine.
[0021] Attached Figure 5 This is the main structure diagram.
[0022] Attached Figure 6 For attachment Figure 5 AA section structure diagram in the initial state,
[0023] Attached Figure 7 This is the AA section structure diagram of the hydraulic cylinders a and b in working state.
[0024] Attached Figure 8 It is a schematic diagram of the AA cross-section structure of hydraulic cylinders c and d in working state.
[0025] In the attached drawings, 1 is a crystallizer, 2 is a condensation guide, 3 is a straightening device, 4 is a frame, 5 is a high-temperature continuous casting billet, a, b, c, d are hydraulic cylinders, and e, f, g, h are forging heads. DETAILED DESCRIPTION
[0026] As attached Figure 1 , 2 , 3, and 4 are schematic diagrams of the structure and working status of the vertical continuous casting machine. Figure 1 It is shown that high-temperature molten steel is injected into the crystallizer 1, enters the condensation guide 2 after water cooling, and slowly extends downward under the action of the straightening device 3 and the gravity of the molten steel. The frame 4 is arranged on the periphery of the high-temperature continuous casting billet 5. The hydraulic cylinders a, b, c, d are fixed on the frame 4, and the forging heads e, f, g, h are correspondingly arranged on the single output rods of the hydraulic cylinders a, d, b, c.
[0027] As attached Figure 2 As shown, the forging heads e, f, g, and h are separated from the high-temperature continuous casting billet 5.
[0028] As attached Figure 3 As shown, hydraulic cylinders d and c drive forging heads f and h respectively to extrude the high-temperature continuous casting billet 5.
[0029] As attached Figure 4 As shown, hydraulic cylinders a and b drive forging heads e and g respectively to extrude the high temperature continuous casting billet 5 through Figure 3 and 4 The high-temperature continuous casting billet 5 is forged in multiple directions. Under the alternating squeezing of the forging heads e, f, g, and h, the central defect in the condensation process is eliminated.
[0030] As attached Figure 5 , 6 , 7, and 8 show the structure and working status of the horizontal continuous casting machine. Figure 5As shown, high-temperature molten steel is injected into the crystallizer 1, enters the condensation guide 2 after water cooling, and slowly extends forward under the action of the straightening device 3 and the gravity of the molten steel. The frame 4 is arranged on the periphery of the high-temperature continuous casting billet 5. The hydraulic cylinders a, b, c, d are fixed on the frame 5, and the forging heads e, f, g, h are correspondingly arranged on the single output rods of the hydraulic cylinders a, d, b, c.
[0031] As attached Figure 6 As shown, the forging heads e, f, g, and h are separated from the high-temperature continuous casting billet 5.
[0032] As attached Figure 7 As shown, hydraulic cylinders a and b respectively drive forging heads e and g to extrude the high-temperature continuous casting billet 5.
[0033] As attached Figure 8 As shown, hydraulic cylinders d and c drive forging heads f and h to extrude high-temperature continuous casting billet 5. Figure 7 and 8 The high-temperature continuous casting billet 5 is forged in multiple directions. Under the alternating squeezing of the forging heads e, f, g, and h, the central defect in the condensation process is eliminated.
Claims
1. A continuous casting machine provided with a forging device, comprising a continuous casting machine, which includes a crystallizer and a straightening device, in which molten steel is crystallized and cooled into a high-temperature continuously cast steel billet, and the straightening device pulls out the high-temperature continuously cast steel billet, characterized in that: A forging device is arranged on the periphery of the high temperature continuous casting steel billet; The forging device comprises a foundation, a bracket, and a forging assembly; The support is arranged on a foundation; The forging assembly is fixed on the bracket, and each forging assembly includes a hydraulic cylinder and a forging head, and the forging head is fixedly connected to the piston rod of the hydraulic cylinder to radially forge the high-temperature continuous casting steel billet; Every two forging assemblies radially symmetrically arranged about the high-temperature continuous casting steel billet constitute a ram group, and the ram groups are arranged in two groups; the two forging rams in each ram group forge the high-temperature continuous casting steel billet radially relative to each other, and the forging rams in the two ram groups forge the high-temperature continuous casting steel billet alternately.
2. A continuous casting machine provided with a forging device according to claim 1, characterized in that: The axes of the forging heads in each set of forging heads coincide with each other, the axes of the two sets of forging heads are on the same plane, and the axes of adjacent forging heads form an angle of 90° with each other.
3. A continuous casting machine provided with a forging device according to claim 1 or 2, characterized in that: The pressing amount of the forging head is 8%-12% of the maximum cross-sectional dimension of the steel billet, and the pressing length each time is ≥50% of the maximum cross-sectional dimension of the steel billet.
4. A continuous casting machine provided with a forging device according to claim 1, characterized in that: The forging device is arranged in a region where the surface temperature of the steel billet is 850--900°C and the core temperature is 1150--1250°C.