A combined bottom box for shaping the lower neck of a multipurpose roller

Abstract

The application discloses a multipurpose roll lower roll neck modeling combined bottom box, which comprises an outer bottom box sand box and a gate distribution box, a shaft shoulder for assembly is formed on the top of the outer bottom box sand box, an outer box ring for modeling is formed in the outer bottom box sand box, an air outlet hole is formed on the bottom of the outer bottom box sand box, the air outlet hole is communicated with an inner cavity enclosed by the outer box ring, the shaft shoulder is located on the top end of a sand box top plate, the shaft shoulder is coaxial with the outer box ring, and a notch coaxial with the outer box ring is formed in the shaft shoulder. The outer box ring in the outer bottom box sand box, the middle circle of the chill iron and the inner circle of the chill iron are used for realizing the modeling of large roll necks, medium roll necks and small roll necks, the bottom box flat flange on the top and the shaft shoulder are used for completing the overall assembly, the outer bottom box sand box and the gate distribution box are hoisted as a whole through the fixed-position hoisting ladder, and the application can meet the use of the bottom pouring process and the top pouring process.

Description

Technical Field

[0001] This invention belongs to the field of roll forming technology, specifically relating to a multi-purpose roll neck forming combination base box. Background Technology

[0002] Since the design of the rolling mill casting process adopts a single specification design and a single manufacturing process drawing, the molds are riser box, rolling mill body metal mold and bottom box. In particular, the lower roll neck, which is the end of the rolling mill drive, must have the ability to have high metal crystal density, good strength and toughness and excellent comprehensive physical and chemical properties.

[0003] To achieve this capability, an environment with increased supercooling must be created during the casting of the lower roll neck to achieve the goal of refining the microstructure during the solidification and cooling of molten steel (iron). Given the characteristics of the aforementioned roll production process, and the wide variety of roll specifications, implementing a set of tooling and molds for each roll would require significant investment in mold production costs. With the national policy of energy conservation, emission reduction, and efficiency improvement in green industries, innovation in the tooling and mold matching for roll production is necessary. Furthermore, the roll production process and procedures must be analyzed. Since riser boxes and roll metal molds are specialized, innovation can only be explored in the lower roll neck molding base box. Summary of the Invention

[0004] This invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a multi-purpose roll neck shaping combination base box.

[0005] The technical solution of the present invention is: a multi-purpose roll neck molding combination bottom box, including an outer bottom box sand box and a gate fitting box, wherein the top of the outer bottom box sand box forms a shoulder for assembly, the outer bottom box sand box forms an outer box ring for molding, and the bottom of the outer bottom box sand box forms an air vent, the air vent communicating with the inner cavity enclosed by the outer box ring.

[0006] Furthermore, the outer bottom sandbox includes a top sandbox plate at the top, a bottom sandbox plate at the bottom, and sandbox walls that vertically connect the two.

[0007] Furthermore, the gate assembly box includes a top assembly box plate at the top, a bottom assembly box plate at the bottom, and an assembly box wall that vertically connects the two.

[0008] Furthermore, the shoulder is located at the top of the sandbox top plate, the shoulder is coaxial with the outer box ring, and a groove coaxial with the outer box ring is formed in the shoulder.

[0009] Furthermore, the outer casing ring includes a cylindrical portion and a transition portion. The transition portion is located at the upper part of the outer casing ring and is an outwardly expanding arc-shaped section. The transition portion transitions between the central hole and the cylindrical portion.

[0010] Furthermore, the upper end of the outer casing ring is not higher than the outer casing ring, and the axial length of the groove is not less than the axial length of the shoulder.

[0011] Furthermore, the inner wall of the outer casing is provided with a chilled iron ring used for shaping medium-sized roll necks.

[0012] Furthermore, the inner wall of the chilled iron ring is provided with an inner chilled iron ring used for small roll neck molding.

[0013] Furthermore, the upper parts of both the middle and inner rings of the chilled iron are formed with upper transition portions corresponding to the transition portions of the outer ring.

[0014] Furthermore, the top plate of the sandbox and the top plate of the distribution box are integral structures, and the bottom plate of the sandbox and the bottom plate of the distribution box are integral structures.

[0015] This invention achieves the shaping of large, medium, and small roller necks through the outer box ring, chilled iron middle ring, and chilled iron inner ring in the outer bottom box sand box. The overall assembly is completed through the bottom box flat flange and shaft shoulder at the top. The outer bottom box sand box and the gate assembly box are lifted as a whole through the fixed-position lifting hook. This invention can meet the needs of both bottom pouring and top pouring processes. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 yes Figure 2 A sectional view along section BB.

[0019] in:

[0020] 1. Outer bottom box and sand box; 2. Gating gate and fitting box.

[0021] 3. Bottom plate of the bottom box; 4. Flat flange of the bottom box.

[0022] 5 Flange mounting holes 6 Vent holes

[0023] 7. Stiffening ribs for the box assembly; 8. Stiffening ribs for the sand box.

[0024] 9. Suspended Climbing Platform 10. Suspended Climbing A

[0025] 11 Outer casing ring 12 Cold-rolled steel inner ring

[0026] 13 Cold iron inner ring 14 Combined sand mold

[0027] 15 Shoulder, 16 Groove

[0028] 17 Hanging Climbing B 18 Hanging Climbing C Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0030] like Figures 1-3 As shown, a multi-purpose roll neck molding assembly base box includes an outer base box sand box 1 and a gate fitting box 2. The top of the outer base box sand box 1 forms a shoulder 15 for assembly, and the outer base box sand box 1 forms an outer box ring 11 for molding. The bottom of the outer base box sand box 1 forms an air vent 6, and the air vent 6 communicates with the inner cavity enclosed by the outer box ring 11.

[0031] The outer bottom sandbox 1 includes a top sandbox plate at the top, a bottom sandbox plate at the bottom, and sandbox walls that vertically connect the two.

[0032] The gate assembly box 2 includes a top assembly box plate at the top, a bottom assembly box plate at the bottom, and an assembly box wall that vertically connects the two.

[0033] The shoulder 15 is located at the top of the sandbox top plate. The shoulder 15 is coaxial with the outer box ring 11, and a groove 16 coaxial with the outer box ring 11 is formed in the shoulder 15.

[0034] The outer casing ring 11 includes a cylindrical portion and a transition portion. The transition portion is located at the upper part of the outer casing ring 11 and is an outwardly expanding arc-shaped section. The transition portion transitions between the central hole and the cylindrical portion.

[0035] The upper end of the outer casing ring 11 is not higher than the outer casing ring 11, and the axial length of the groove 16 is not less than the axial length of the shoulder 15.

[0036] The inner wall of the outer casing ring 11 is provided with a chilled iron middle ring 12 used for shaping medium-sized roll necks.

[0037] The inner wall of the chilled iron middle ring 12 is provided with a chilled iron inner ring 13 used for small roll neck molding.

[0038] The upper parts of the middle ring 12 and the inner ring 13 of the chilled iron are both formed with an upper transition portion corresponding to the transition portion of the outer ring 11.

[0039] The top plate of the sand box and the top plate of the equipment box are integral structures, and the bottom plate of the sand box and the bottom plate of the equipment box are integral structures.

[0040] Specifically, the vent 6 is coaxial with the outer casing ring 11.

[0041] Specifically, a bottom box flat flange 4 is formed on the top of the top plate of the box, and flange mounting holes 5 for upper and lower installation are formed in the bottom box flat flange 4.

[0042] Preferably, the flange mounting holes 5 are at least four.

[0043] Specifically, the top and bottom plates of the sandbox protrude from the sandbox walls on both sides. In order to reinforce the outer bottom sandbox 1, sandbox stiffening ribs 8 are provided between the top and bottom plates of the sandbox.

[0044] Specifically, the top plate and bottom plate of the gating box extend out of the gating box wall on both sides. In order to reinforce the gating box 2, gating stiffening ribs 7 are provided between the top plate and the bottom plate of the gating box.

[0045] Accordingly, the width of the sand box stiffening rib 8 should be greater than that of the sand box stiffening rib 7 to ensure the firmness and stability of the sand box stiffening rib 8.

[0046] A combined sand mold 14 is also provided between the outer casing ring 11 and the chilled iron middle ring 12.

[0047] The tops of the outer casing ring 11, the middle chilled iron ring 12, and the inner chilled iron ring 13 are flush.

[0048] Another embodiment

[0049] A multi-purpose roll neck molding assembly base box includes an outer base box sand box 1 and a gate fitting box 2. The top of the outer base box sand box 1 forms a shoulder 15 for assembly, and the outer base box sand box 1 forms an outer box ring 11 for molding. The bottom of the outer base box sand box 1 forms an air vent 6, and the air vent 6 communicates with the inner cavity enclosed by the outer box ring 11.

[0050] The outer bottom sandbox 1 includes a top sandbox plate at the top, a bottom sandbox plate at the bottom, and sandbox walls that vertically connect the two.

[0051] The gate assembly box 2 includes a top assembly box plate at the top, a bottom assembly box plate at the bottom, and an assembly box wall that vertically connects the two.

[0052] The shoulder 15 is located at the top of the sandbox top plate. The shoulder 15 is coaxial with the outer box ring 11, and a groove 16 coaxial with the outer box ring 11 is formed in the shoulder 15.

[0053] The outer casing ring 11 includes a cylindrical portion and a transition portion. The transition portion is located at the upper part of the outer casing ring 11 and is an outwardly expanding arc-shaped section. The transition portion transitions between the central hole and the cylindrical portion.

[0054] The upper end of the outer casing ring 11 is not higher than the outer casing ring 11, and the axial length of the groove 16 is not less than the axial length of the shoulder 15.

[0055] The inner wall of the outer casing ring 11 is provided with a chilled iron middle ring 12 used for shaping medium-sized roll necks.

[0056] The inner wall of the chilled iron middle ring 12 is provided with a chilled iron inner ring 13 used for small roll neck molding.

[0057] The upper parts of the middle ring 12 and the inner ring 13 of the chilled iron are both formed with an upper transition portion corresponding to the transition portion of the outer ring 11.

[0058] The top plate of the sand box and the top plate of the equipment box are integral structures, and the bottom plate of the sand box and the bottom plate of the equipment box are integral structures.

[0059] Specifically, the vent 6 is coaxial with the outer casing ring 11.

[0060] Specifically, a bottom box flat flange 4 is formed on the top of the top plate of the box, and flange mounting holes 5 for upper and lower installation are formed in the bottom box flat flange 4.

[0061] Preferably, the flange mounting holes 5 are at least four.

[0062] Specifically, the top and bottom plates of the sandbox protrude from the sandbox walls on both sides. In order to reinforce the outer bottom sandbox 1, sandbox stiffening ribs 8 are provided between the top and bottom plates of the sandbox.

[0063] Specifically, the top plate and bottom plate of the gating box extend out of the gating box wall on both sides. In order to reinforce the gating box 2, gating stiffening ribs 7 are provided between the top plate and the bottom plate of the gating box.

[0064] Accordingly, the width of the sand box stiffening rib 8 should be greater than that of the sand box stiffening rib 7 to ensure the firmness and stability of the sand box stiffening rib 8.

[0065] A combined sand mold 14 is also provided between the outer casing ring 11 and the chilled iron middle ring 12.

[0066] The tops of the outer casing ring 11, the middle chilled iron ring 12, and the inner chilled iron ring 13 are flush.

[0067] The outer bottom sand box 1 is equipped with lifting rods A10, B17, and C18 on its side wall. The lifting rods A10, B17, and C18 are used in combination to lift the outer bottom sand box 1 and the pouring gate box 2.

[0068] Preferably, the axis of the lifting rod A10 passes through the axis of the outer box ring 11, and the axis of the lifting rod A10 is within the range of the gate box 2.

[0069] Preferably, neither the lifting rod B17 nor the lifting rod C18 passes through the axis of the outer box ring 11. The lifting rods B17 and C18 are close to the gate box 2, which facilitates the overall lifting and ensures stability.

[0070] Specifically, a lifting platform 9 is formed on the outer wall of the outer bottom sand box 1, and the height of the lifting platform 9 does not exceed the stiffening rib 8 of the sand box. The three lifting platforms 9 respectively fix the lifting platform A10, lifting platform B17, and lifting platform C18.

[0071] The hoisting rods A10, B17, and C18 protrude from the top of the sandbox.

[0072] In the vertical direction, the hoisting rods A10, B17, and C18 are located in the middle of the outer bottom sand box 1.

[0073] The middle ring 12 and the inner ring 13 of the chilled iron are one or more segments.

[0074] The curvature of the top of the middle ring 12 and the inner ring 13 of the chilled iron is slightly greater than that of the transition part of the outer ring 11.

[0075] The usage process of this invention is as follows:

[0076] The outer box ring 11, the middle ring 12, and the inner ring 13 of the chilled iron in the outer bottom box sand box 1 are selected and combined according to different casting methods and different lower roller neck specifications and dimensions.

[0077] When bottom-filling large roller necks (500-650mm), directly use the outer bottom box sand box 1 and the outer box ring 11 for shaping.

[0078] When bottom-filling the medium-sized roller neck (400-500mm), on the basis of the outer box ring 11 in the outer bottom box sand box 1, the chilled iron middle ring 12 is placed inside the outer box ring 11, with the tangent of the middle ring aligned with one side of the gate fitting box 2, so as to facilitate the insertion of the inner gate during molding.

[0079] When injecting small roller necks (200-400mm), simply insert the inner ring 13 of the chilled iron into the middle ring 23 of the chilled iron, based on the outer box ring 11 and the middle ring 12 of the chilled iron in the outer bottom box sand box 1.

[0080] In the process of modeling

[0081] When molding large roller necks, first fill 3-5mm of molding sand into the bottom vent 6 plane of the outer bottom sand box 1, then place a 50-80mm high-temperature resistant firebrick, then put in the roller neck mold, fill 30-50mm of sand, and after it is solidified, place the inner gate, fill with sand again, solidify it, and then remove the mold. Then brush 3-5mm of coating, air dry for a period of time, and then bake for later use.

[0082] The molding method for medium-sized roll necks is the same as that for large roll necks. The gap between the outer box ring 11 and the chilled iron middle ring 12 is filled with dry sand and made firm.

[0083] For small roller neck shaping, after the inner ring of the chill is 13mm in, sand is directly applied to the inner cavity of the chill for 12-15mm, then paint is applied and left to stand for several hours before baking in the furnace for later use.

[0084] Correspondingly, when using the top-pour process, in addition to bottom-pour casting, sand should be filled and compacted at the sprue box 2 during mold making.

[0085] This invention can satisfy both the bottom injection production process and the top injection production process of the roll.

[0086] This invention achieves the shaping of large, medium, and small roller necks through the outer box ring, chilled iron middle ring, and chilled iron inner ring in the outer bottom box sand box. The overall assembly is completed through the bottom box flat flange and shaft shoulder at the top. The outer bottom box sand box and the gate assembly box are lifted as a whole through the fixed-position lifting hook. This invention can meet the needs of both bottom pouring and top pouring processes.

Claims

1. A multi-purpose roll neck molding assembly base box, comprising an outer base box sand box (1) and a gating box (2), characterized in that: The top of the outer bottom sand box (1) forms a shoulder (15) for assembly, the outer bottom sand box (1) forms an outer box ring (11) for shaping, and the bottom of the outer bottom sand box (1) forms an air vent (6). The air vent (6) is connected to the inner cavity enclosed by the outer box ring (11). The shoulder (15) is located at the top of the sandbox top plate. The shoulder (15) is coaxial with the outer box ring (11). A groove (16) coaxial with the outer box ring (11) is formed in the shoulder (15). The outer casing ring (11) includes a cylindrical part and a transition part. The transition part is located at the upper part of the outer casing ring (11). The transition part is an outwardly expanding arc-shaped section. The transition part transitions between the central hole and the cylindrical part. The upper end of the outer casing ring (11) is not higher than the outer casing ring (11), and the axial length of the slot (16) is not less than the axial length of the shoulder (15). The inner wall of the outer box ring (11) is provided with a chilled iron middle ring (12) used for shaping medium-sized roller necks. The inner wall of the chilled iron middle ring (12) is provided with a chilled iron inner ring (13) used for small roll neck molding. The tops of the outer casing ring (11), the middle ring of the chilled iron (12), and the inner ring of the chilled iron (13) are flush.

2. The multi-purpose roll neck shaping combination base box according to claim 1, characterized in that: The outer bottom sandbox (1) includes a sandbox top plate at the top, a sandbox bottom plate at the bottom, and a sandbox wall that vertically connects the two.

3. The multi-purpose roll neck shaping combination base box according to claim 2, characterized in that: The gate box (2) includes a top plate at the top, a bottom plate at the bottom, and a box wall that vertically connects the two.

4. The multi-purpose roll neck shaping combination base box according to claim 1, characterized in that: The upper part of the middle ring (12) and the inner ring (13) of the chilled iron are both formed with an upper transition part corresponding to the transition part of the outer ring (11).

5. A multi-purpose roll neck shaping combination base box according to claim 3, characterized in that: The top plate of the sand box and the top plate of the equipment box are integral structures, and the bottom plate of the sand box and the bottom plate of the equipment box are integral structures.

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