Converter shell cone water-cooling half tube forming mould

Abstract

The utility model belongs to the technical field of converter shell cone water-cooling half tube forming, and particularly relates to a converter shell cone water-cooling half tube forming mould which is characterized by comprising an inner top plate, an inner bottom plate, inner tube plates, an outer top plate, an outer bottom plate and an outer tube plate, the inner top plate and the inner bottom plate are vertically connected to form an included angle, and a plurality of inner tube plates are uniformly arranged in the included angle; the outer top plate and the outer bottom plate are perpendicularly connected to form an included angle, a plurality of outer tire plates are evenly arranged outside the included angle in the length direction of the outer top plate, and an arc-shaped water-cooling half-pipe cold pressing cavity is formed between the inner tire plates and the outer tire plates. The water-cooling half-pipe mould has the advantages that the rebound characteristic of the steel pipe is creatively utilized, the water-cooling half-pipe mould can be used for forming the upper arc half pipe of the furnace shell cone and can also be used for forming the lower arc half pipe of the furnace shell cone, half of manpower and material resources are saved, and finally the purposes of reducing cost and improving efficiency are achieved. The mould has universality and can be used for forming various furnace shell water-cooling half pipes, and the mould does not need to be made again every time.

Description

Technical Field

[0001] The utility model belongs to the technical field of furnace shell cone water-cooled half-tube forming, in particular to a converter furnace shell cone water-cooled half-tube forming mold. Background Art

[0002] The converter shell is an important equipment for steelmaking. In order to prevent the shell from overheating, a water cooling pipe is designed in the upper part of the converter shell and filled with water for cooling to achieve cooling and temperature reduction, improve the steelmaking quality of the converter, and extend the service life of the equipment. The arc-shaped water-cooling half-tube on the surface of the cone of the shell needs to fit tightly with the cone of the shell, and it is qualified only if it is guaranteed to be leak-proof after welding. Since the shell is a conical shell with a small top and a large bottom, the water-cooling half-tube on its surface is divided into an upper arc half-tube and a lower arc half-tube. The upper arc half-tube and the lower arc half-tube are connected by a straight half-tube to form a continuous water cooling channel, see attached. Figure 1 .

[0003] The Chinese utility model application number 200810012857.X discloses a hot press forming jig for a converter shell variable arc segment and a jig manufacturing method. The jig consists of an upper tire plate, a lower tire plate, a cover plate, and a surrounding plate. The upper tire plate and the lower tire plate are CNC cut according to the size of the converter variable arc segment to be hot-pressed, and are assembled and welded in order according to the size requirements. Each upper tire plate and the lower tire plate are welded to the cover plate on the outside of the variable arc segment and to the surrounding plate on the inside of the variable arc segment.

[0004] This type of jig calculates the precise dimensions of each position of the variable arc segment and considers the reasonable force direction during the pressing process. It adopts hot pressing molding, accurate material cutting and high molding precision. Since the curvature of the upper arc half pipe and the lower arc half pipe of the cone are not the same, two sets of molding jigs are required. According to the conventional water-cooled half pipe molding method, some tire plates are cut by CNC to form the molding radius required by the drawing. The two ends of the pipe are manually pushed with a jack, and then two people heat the half pipe with a flame to make the half pipe in a red-hot state, and then use the external force of the overhead crane to pull the half pipe to achieve half pipe molding. If the flame heating is uneven, the water-cooled half pipe molding quality will be poor and the repair amount will also be large. Since a group of furnace shell cone water-cooled half pipes have different sizes, 2-3 sets of tire plates are required, which is labor-intensive. It takes about a week to bend a group of water-cooled pipes, which is time-consuming and labor-intensive, with a long production period and low efficiency, and cannot meet production needs. Utility Model Content

[0005] The purpose of the utility model is to provide a water-cooled half-tube forming jig for the cone of the shell of a converter, overcome the shortcomings of the prior art, utilize the rebound characteristics of the steel pipe itself, design a group of common forming jigs, and manufacture them by blanking, assembling and welding. The upper arc half-tube and the lower arc half-tube of the cone of the shell share a set of jigs, which can shorten the forming time of the water-cooled half-tube of the cone of the shell, save manpower and material resources, and ultimately achieve the purpose of reducing costs and increasing efficiency.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A water-cooled half-tube forming mold for a converter shell cone comprises an inner top plate, an inner bottom plate, an inner tire plate, an outer top plate, an outer bottom plate and an outer tire plate, one end of the inner top plate is vertically connected to one end of the inner bottom plate to form an angle, a plurality of inner tire plates are evenly arranged along the length direction of the inner top plate within the angle, one end of the outer top plate is vertically connected to one end of the outer bottom plate to form an angle, a plurality of outer tire plates are evenly arranged along the length direction of the outer top plate outside the angle, and an arc-shaped water-cooled tube cold pressing cavity is formed between the inner tire plate and the outer tire plate.

[0008] The target radius of the water-cooling tube cavity is 300 mm smaller than the radius of the lower arc half tube.

[0009] The pre-reduction springback radius of the water-cooling tube cavity is 300 mm.

[0010] The original diameter of the water cooling tube is 125 mm.

[0011] The spacing between adjacent inner tube plates is 50-80 mm.

[0012] The number of the inner tire plates is consistent with that of the outer tire plates, and their positions correspond one to one.

[0013] A gasket is provided on the inner tire plate side and / or the outer tire plate side of the arc-shaped water-cooling tube cold-pressing cavity.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) After using this set of molds to form, the effect is very good. It only takes 2 days to complete the forming of all the water-cooled half-tubes of a set of furnace shells. For a converter project with four sets of converter shells, it can save half a month of production time, which shows that this mold is very successful.

[0016] 2) Creatively utilizing the springback characteristics of the steel tube, a set of water-cooled half-tube jigs can be used for both the upper arc half-tube forming of the furnace shell cone and the lower arc half-tube forming of the furnace shell cone, saving half of the manpower and material resources, and ultimately achieving the goal of reducing costs and increasing efficiency.

[0017] 3) The mold is universal. It can be used for water-cooled half-tube molding of various converter shell cones by simple gasketing or a little heating according to the size of the converter shell cone. It is not necessary to make a new mold every time a furnace shell project is made, which saves time and labor and reduces material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the appearance of a conical converter shell in current technology;

[0019] Figure 2This is a schematic diagram of the assembly of the water-cooled half-tube of the cone of the converter shell of the utility model, and the water-cooled tube cavity 12 is the mold radius;

[0020] Figure 3 It is a schematic structural diagram of an embodiment of a water-cooled half-tube forming jig for a converter shell cone of the utility model;

[0021] Figure 4 yes Figure 3 Sectional view along line AA;

[0022] Figure 5 yes Figure 4 Schematic diagram of the medium cavity structure.

[0023] In the figure: 1-inner tire plate, 2-inner top plate, 3-inner bottom plate, 4-outer bottom plate, 5-outer tire plate, 6-outer top plate, 7-water cooling tube, 8-furnace shell, 9-upper arc half tube, 10-lower arc half tube, 11-straight tube, 12-water cooling tube cavity. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0026] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0027] See Figure 2-5, is a schematic structural diagram of an embodiment of a mold for forming a water-cooled half-tube of a converter shell cone of the utility model, comprising an inner top plate 2, an inner bottom plate 3, an inner tube plate 1, an outer top plate 6, an outer bottom plate 4 and an outer tube plate 5, one end of the inner top plate 2 is vertically connected to one end of the inner bottom plate 3 to form an angle, a plurality of inner tube plates 1 are evenly arranged along the length direction of the inner top plate 2 inside the angle, one end of the outer top plate 6 is vertically connected to one end of the outer bottom plate 4 to form an angle, a plurality of outer tube plates 5 are evenly arranged along the length direction of the outer top plate 6 outside the angle, and a water-cooled tube 7 cold-pressing cavity is formed between the inner tube plate 1 and the outer tube plate 5. The mold of the utility model is assembled with an existing hydraulic cylinder tightening device, and the purpose of forming a water-cooled half-tube is achieved through mechanical telescopic movement, and a set of molds solves the water-cooled half-tube forming of two radii of the upper arc half-tube 9 and the lower arc half-tube 10 of the shell cone, which can significantly save production time.

[0028] In the embodiment, the original diameter of the water-cooling tube is 125mm. The target radius of the water-cooling tube cavity is 300mm smaller than the radius of the lower arc half tube. The radius of the lower arc half tube 10 on the furnace shell 8 is 3198.7mm, the radius of the upper arc half tube 9 is 2368mm, and the target radius of the water-cooling tube cavity 12 is 2898.7mm. The pre-reduction rebound radius of the water-cooling tube cavity is 300mm. The radius of the water-cooling half tube is 65mm. The spacing between adjacent inner tube plates 1 is 60mm. The number of inner tube plates 1 and outer tube plates 5 is the same and the positions correspond one to one. A gasket can be provided on the inner tube plate side and / or the outer tube plate side of the arc-shaped water-cooling tube cold-pressing cavity, so that the radius of the water-cooling half tube cavity can be fine-tuned, and the upper arc half tube 9 and the lower arc half tube 10 are obtained respectively. The upper arc half tube 9 and the lower arc half tube 10 are connected by a straight tube 11, which is a water cooling channel.

[0029] The production of the water-cooled half-tube forming jig for the cone of the converter shell of the utility model includes structural blanking, assembly, welding, inspection, trimming and cold pressing. The specific operation steps are as follows:

[0030] 1) Structural blanking, CNC blanking of inner top plate, inner bottom plate, inner tube plate, outer top plate, outer bottom plate and outer tube plate; Due to cold forming, the water-cooling pipe is a section of arc-shaped half-tube, and there is rebound after forming, so the rebound amount should be considered in the design. The design rebound is to reduce the forming radius by 300mm, that is, the forming effect can be achieved.

[0031] 2) Assemble according to the drawing and fix by spot welding;

[0032] 3) For welding, adopt narrow-pass multi-layer welding, use air hammer to eliminate interlayer stress while welding, perform welding symmetrically, and perform multi-stage and intermittent welding until the welding is full to minimize deformation; use ER50-6, φ1.2-2.0 welding wire, current 250-260A, voltage 28-30V, and gas flow 15-20L / min.

[0033] 4) Inspection: Check with a sample after welding to ensure that the dimensions are within the design deviation range;

[0034] 5) Finishing: Grind and trim the out-of-tolerance parts until the size meets the design requirements, and place a sample to check the accuracy of the mold;

[0035] 6) Cold pressing: Place the cut water-cooled half pipe section into the water-cooled half pipe cold pressing cavity, and the hydraulic cylinder squeezes the inner top plate and / or the outer top plate from the outside of the inner top plate and / or the outer top plate, so that the water-cooled half pipe undergoes plastic deformation. Before cold pressing, add or remove gaskets or slightly heat as needed to control the rebound amount, so that the curvature of the water-cooled half pipe corresponds to the upper arc half pipe of the furnace shell cone or the lower arc half pipe of the furnace shell cone.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooled half-tube forming mold for a converter shell cone, characterized in that: It includes an inner top plate, an inner bottom plate, an inner tube plate, an outer top plate, an outer bottom plate and an outer tube plate. One end of the inner top plate is vertically connected to one end of the inner bottom plate to form an angle. A number of inner tube plates are evenly arranged along the length direction of the inner top plate inside the angle. One end of the outer top plate is vertically connected to one end of the outer bottom plate to form an angle. A number of outer tube plates are evenly arranged along the length direction of the outer top plate outside the angle. An arc-shaped cold-pressed cavity for a water-cooling pipe is formed between the inner tube plate and the outer tube plate.

2. A water-cooled half-tube forming jig for a converter shell cone according to claim 1, characterized in that: The target radius of the cold pressing cavity is 300 mm smaller than the radius of the lower arc half pipe.

3. The water-cooled half-tube forming mold for the cone of the converter shell according to claim 1, characterized in that: The pre-reduced springback radius of the cold pressing cavity is 300 mm.

4. The water-cooled half-tube forming jig for a converter shell cone according to claim 1, characterized in that: The original diameter of the water cooling tube is 125 mm.

5. The water-cooled half-tube forming jig for the cone of a converter shell according to claim 1, characterized in that: The spacing between adjacent inner tube plates is 50-80 mm.

6. The water-cooled half-tube forming jig for the cone of a converter shell according to claim 1, characterized in that: The number of the inner tire plates is consistent with that of the outer tire plates, and their positions correspond one to one.

7. The water-cooled half-tube forming jig for a converter shell cone according to claim 1, characterized in that: A gasket is provided on the inner tire plate side and / or the outer tire plate side of the cold pressing cavity.

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