Large diameter metal ingot spray forming equipment and method

Abstract

The present invention discloses a large-diameter metal ingot spray forming equipment and method, including a tray, a lifting and rotating device and a spraying device, wherein the tray has a vertical central axis, and the lifting and rotating device drives the tray to rotate around the central axis and move along the central axis; the spraying device includes a plurality of spraying assemblies located above the tray, and the plurality of spraying assemblies are spaced radially along the tray; the spraying assemblies include a plurality of nozzles and a swinging mechanism that drives the plurality of nozzles to swing synchronously, and the plurality of nozzles are arranged circumferentially along the tray. The plurality of spraying assemblies spray different circular areas in the precipitated metal ingot, and the spraying assemblies away from the center of the tray can be provided with a plurality of nozzles, and the plurality of nozzles in the spraying assemblies can mutually fill the intervals in the "petal-shaped" scanning trajectory formed on the deposition surface during the swinging spraying process, so that the outer periphery of the metal ingot away from the center is fully covered by the jet, thereby obtaining a uniform coating to meet the preparation of metal ingots with larger diameters.

Description

Technical Field

[0001] The invention relates to the field of spray forming, and in particular to a large-diameter metal ingot spray forming device and method. Background Art

[0002] Since the advent of spray forming in the 1970s, its technical and economic benefits in the field of high-end metal material preparation have been increasingly recognized. The principle of metal liquid atomization deposition of spray-formed metal ingots is as follows: the metal liquid is atomized by high-pressure inert gas into 10-100μm droplets to form a jet, which impacts a circular deposition surface at a speed of about 300 meters per second and solidifies rapidly. The circular tray rotates while receiving metal atomization deposition and descends at a certain speed to form a circular metal ingot. In order to ensure that the metal jet is evenly deposited on the tray, the nozzle reciprocates, thereby causing the metal jet to radially scan on the rotating disc to obtain a uniform and flat deposition surface.

[0003] The radial swing of the jet on the tray and the rotation of the tray make the movement trajectory of the center of the atomized metal liquid jet on the tray like a petal. If a uniform coating is to be obtained, the spacing between the petals should not exceed the area covered by twice the radius of the jet. Obviously, when the nozzle swing frequency and the metal ingot rotation speed are constant, the larger the diameter of the metal ingot, the larger the spacing between the petals (the outer ends of the scanning trajectory), and the existing spray forming equipment is difficult to meet the needs. Summary of the invention

[0004] The object of the present invention is to provide a large diameter metal ingot spray forming device and method to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] First, the present invention provides a large-diameter metal ingot spray forming equipment, which includes: a tray, a lifting and rotating device and a spray device, the tray has a vertical central axis, the lifting and rotating device drives the tray to rotate around the central axis and move along the central axis; the spray device includes a plurality of spray assemblies located above the tray, and the plurality of spray assemblies are arranged at intervals along the radial direction of the tray; the spray assemblies include a plurality of nozzles and a swinging mechanism that drives the plurality of nozzles to swing synchronously, the plurality of nozzles are arranged along the circumference of the tray, and the nozzles face the top surface of the tray.

[0007] The beneficial effect of the present invention is that when a metal ingot is spray-formed, a plurality of spray assemblies spray and precipitate different circular areas in the metal ingot. When the diameter of the metal ingot to be formed is larger, a plurality of nozzles can be set at the spray assembly away from the center of the tray, and the plurality of nozzles are arranged at intervals along the circumference of the tray. When the swing mechanism drives the nozzle to swing back and forth and the lifting and rotating device drives the tray to rotate and lift, the plurality of nozzles in the spray assembly can fill each other with the intervals in the "petal-shaped" scanning trajectory formed on the deposition surface during the swinging spraying process, so that the outer periphery of the metal ingot away from the center is fully covered by the jet, thereby obtaining a uniform coating to meet the preparation of metal ingots with larger diameters.

[0008] As a further improvement of the above technical solution, the axis of the nozzle is staggered with the central axis during the swinging process. In this way, multiple nozzles on each spray assembly can perform radial scanning on the tray, and the spray scanning trajectory of each nozzle is centered on the central axis, so as to prepare a more uniform round metal ingot.

[0009] As a further improvement of the above technical solution, in two adjacent injection assemblies, the number of nozzles of the inner injection assembly is not greater than that of the outer injection assembly.

[0010] According to actual needs, in the injection assembly that is farther away from the central axis of the tray, the number of nozzles on the outer injection assembly is generally greater than that on the inner injection assembly, while the number of nozzles on the injection assembly closer to the central axis of the tray can be the same. For example, the two injection assemblies close to the central axis of the tray can be provided with one nozzle, and the third injection assembly can be provided with two nozzles.

[0011] As a further improvement of the above technical solution, the spray assembly further includes a swing shaft, the swing mechanism is transmission-connected to the swing shaft, and the nozzle is mounted on the swing shaft.

[0012] The swing mechanism in this solution drives the swing shaft to swing back and forth around its own axis to drive several nozzles on the swing shaft to swing synchronously. The structure is simple and the design only requires adjusting the swing frequency and speed driven by the swing mechanism.

[0013] As a further improvement of the above technical solution, it also includes a spray chamber, wherein the nozzle and the tray are arranged in the spray chamber. The spray chamber provides space for the metal ingot to avoid being oxidized during the spraying process.

[0014] As a further improvement of the above technical solution, the injection chamber is equipped with a tundish, and the bottom of the tundish is provided with a plurality of liquid outlets connected to the nozzles.

[0015] In this solution, a tundish is provided to contain the molten metal to be sprayed, and the molten metal flows to each nozzle through a plurality of liquid outlets.

[0016] As a further improvement of the above technical solution, the swing shaft is a hollow structure, which is provided with an air channel connected to the nozzle, and both ends of the swing shaft are connected to air hoses connected to the air channel.

[0017] When in use, the gas hose is connected to the inert gas supply device, and the inert gas enters the nozzle to atomize the molten metal and spray it out to form a metal jet.

[0018] As a further improvement of the above technical solution, the nozzle is inclined downward toward the top surface of the tray.

[0019] As a further improvement of the above technical solution, the swing mechanism adopts a cam driving structure.

[0020] In addition, the present invention also provides a large-diameter metal ingot spray forming method, the specific steps are as follows:

[0021] S1, prepare the above-mentioned large diameter metal ingot spray forming equipment;

[0022] S2, filling the injection chamber with inert gas;

[0023] S3. The swing mechanism drives the nozzle to swing back and forth, and the metal jet is sprayed and deposited onto the top surface of the tray through the nozzle. At the same time, the lifting and rotating device drives the tray to rotate around the central axis and move downward along the central axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0025] Figure 1 It is a schematic diagram of an embodiment of the large diameter metal ingot spray forming equipment provided by the present invention;

[0026] Figure 2 yes Figure 1 FF cross-sectional view in FIG.

[0027] Figure 3 The large diameter metal ingot spray forming equipment provided by the present invention has a jet scanning trajectory in one embodiment;

[0028] Figure 4 It is the motion trajectory diagram of the center of the atomized metal liquid jet on the tray when a single nozzle sprays reciprocatingly;

[0029] Figure 5 It is a schematic diagram of an embodiment of the swing mechanism provided by the present invention. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] In the prior art, in order to ensure uniform deposition on the metal jet tray 100, the nozzle 310 performs reciprocating motion, thereby making the metal jet perform radial scanning on the rotating tray 100 to obtain a uniform and flat deposition surface. The motion trajectory of the center of the atomized metal liquid jet on the tray 100 is as follows: Figure 4 As shown in the petal shape in the figure, 0.5R is the radius of the metal jet. It can be seen that if a uniform coating is to be obtained, the petal spacing should not exceed the area covered by twice the jet radius.

[0035] Obviously, when the swing frequency of the nozzle 310 and the rotation speed of the metal ingot are constant (these two process parameters have upper limits, for example, when the swing frequency exceeds 6Hz, the life of the mechanical components decreases sharply; and the larger the diameter of the metal ingot, the lower the rotation speed is required, otherwise the excessive centrifugal force will damage the red-hot metal ingot that has just been sprayed), the larger the diameter of the metal ingot, the larger the spacing of the petals (the outer end of the scanning track), and the existing mechanism with only one nozzle 310 is difficult to meet the needs. Furthermore, the present technology provides a new type of large-diameter metal ingot spray forming equipment.

[0036] Reference Figure 1 to Figure 5 The large diameter metal ingot spray forming equipment of the present invention is implemented as follows:

[0037] The large-diameter metal ingot spray forming equipment of this embodiment includes a spray chamber 400, a tray 100, a lifting and rotating device 200 and a spray device. The spray chamber 400 provides space for the metal ingot to avoid oxidation during the spraying process.

[0038] The tray 100 is disposed in the spray chamber 400 , the central axis of the tray 100 is vertically disposed, and a deposition top surface facing upward is disposed on the top of the tray 100 .

[0039] The lifting and rotating device 200 is transmission-connected with the tray 100, and is used to drive the tray 100 to rotate around the central axis of the tray 100, and to drive the tray 100 to lift and lower the central axis of the tray 100. The lifting and rotating device 200 is installed at the lower part of the tray 100, so as not to affect the spraying.

[0040] The spraying device of this embodiment includes a plurality of spraying assemblies 300, and the plurality of spraying assemblies 300 are arranged on one side above the tray 100, wherein the plurality of spraying assemblies 300 are arranged at intervals along the radial direction of the tray 100, and the spraying assemblies 300 include a plurality of nozzles 310 and a swinging mechanism 320, wherein the swinging mechanism 320 is used to drive the plurality of nozzles 310 to swing synchronously, wherein the plurality of nozzles 310 are arranged at intervals along the circumference of the tray 100, and the swinging of the nozzle 310 is to perform radial scanning on the tray 100, and the spraying direction of the nozzle 310 is toward the top surface of the tray 100, and the nozzle 310 sprays at a downward tilt.

[0041] Furthermore, in two adjacent spray assemblies 300, the number of nozzles 310 in the inner spray assembly 300 is not greater than that in the outer spray assembly 300. According to actual needs, in the spray assembly 300 that is farther away from the central axis of the tray 100, the number of nozzles 310 on the outer spray assembly 300 is generally greater than that on the inner spray assembly 300, while in the spray assembly 300 that is closer to the central axis of the tray 100, the number of nozzles 310 can be the same.

[0042] In this embodiment, three spray assemblies 300 are provided. Two spray assemblies 300 close to the central axis of the tray 100 are provided with one nozzle 310 , and the third spray assembly 300 at the outermost side is provided with two nozzles 310 .

[0043] During the injection molding of the metal ingot, a plurality of injection assemblies 300 spray different circular areas in the deposited metal ingot. When the diameter of the metal ingot to be molded is larger, a plurality of nozzles 310 may be provided in the injection assembly 300 away from the center of the tray 100, and the plurality of nozzles 310 are arranged at intervals along the circumference of the tray 100. When the swing mechanism 320 drives the nozzle 310 to swing back and forth and the lifting and rotating device 200 drives the tray 100 to rotate and lift, the plurality of nozzles 310 in the injection assembly 300 may fill in the intervals in the "petal-shaped" scanning trajectory formed on the deposition surface during the swinging and injection process, so that the outer periphery of the metal ingot away from the center is fully covered by the jet, thereby obtaining a uniform coating to meet the preparation requirements of metal ingots with larger diameters.

[0044] like Figure 3 As shown, it is a spray forming device for a metal ingot with a diameter of 850, which includes two single nozzles 310 and a connected swinging double nozzle 310.

[0045] Furthermore, during the swinging process of the nozzle 310, the axis of the nozzle 310 is staggered with the central axis of the tray 100, so that the multiple nozzles 310 on each injection assembly 300 can perform radial scanning on the tray 100, and the injection scanning trajectory of each nozzle 310 is centered on the central axis, thereby preparing a more uniform round metal ingot.

[0046] The spray assembly 300 of this embodiment also includes a swing shaft 330, which is transmission-connected to the swing mechanism 320. The nozzles 310 on the spray assembly 300 are mounted on the swing shaft 330. The swing mechanism 320 drives the swing shaft 330 to swing back and forth around its own axis to drive the plurality of nozzles 310 on the swing shaft 330 to swing synchronously. The structure is simple, and the design only requires adjusting the swing frequency and speed driven by the swing mechanism 320.

[0047] In addition, a tundish 410 is disposed on the top of the spray chamber 400 , and a plurality of liquid outlets 411 are disposed at the bottom of the tundish 410 . The liquid outlets 411 are connected to the nozzles 310 . The tundish 410 is used to hold the molten metal to be sprayed, and the molten metal flows to each nozzle 310 through the plurality of liquid outlets 411 .

[0048] The swing shaft 330 of this embodiment is a hollow structure, and the swing shaft 330 is provided with an air passage connected to the nozzle 310. Both ends of the swing shaft 330 are connected with air hoses 331. When in use, the air hose 331 is connected to the inert gas supply device, and the inert gas enters the nozzle 310, so that the molten metal is atomized and sprayed out to form a metal jet.

[0049] like Figure 5 As shown, the swing mechanism 320 is a cam driven structure.

[0050] This embodiment also provides a large diameter metal ingot spray forming method, the specific steps of which are as follows:

[0051] S1. Prepare the above-mentioned large-diameter metal ingot spray forming equipment, fill the spray chamber 400 with inert gas to evacuate it, and avoid oxygen inside the spray chamber 400;

[0052] S2, pour the molten metal into the tundish 410, and connect the gas hose 331 to the inert gas supply device;

[0053] S3, then the swing mechanism 320 drives the nozzle 310 to swing back and forth, and the metal jet is sprayed onto the top surface of the tray 100 through the nozzle 310;

[0054] At the same time, the lifting and rotating device 200 drives the tray 100 to rotate around the central axis of the tray 100 and descend along the central axis of the tray 100.

[0055] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A large diameter metal ingot spray forming equipment, characterized in that: It includes: A tray (100) having a vertical central axis, A lifting and rotating device (200) which drives the tray (100) to rotate around the central axis and move along the central axis; A spraying device, comprising a plurality of spraying assemblies (300) located above a tray (100), the plurality of spraying assemblies (300) being arranged on one side above the tray (100), and the plurality of spraying assemblies (300) being arranged at intervals along the radial direction of the tray (100); the spraying assemblies (300) comprising a plurality of nozzles (310), and a swing mechanism (320) for driving the plurality of nozzles (310) to swing synchronously, the plurality of nozzles (310) being arranged along the circumference of the tray (100), and the nozzles (310) facing the top surface of the tray (100); During the swinging process, the axis of the nozzle (310) intersects with the central axis; In two adjacent spray assemblies (300), the number of nozzles (310) of the inner spray assembly (300) is not greater than that of the outer spray assembly (300); The nozzle (310) is inclined downward toward the top surface of the tray (100); The method for spray forming a large diameter metal ingot has the following specific steps: S1, preparing the large diameter metal ingot spray forming equipment; S2, filling the injection chamber (400) with an inert gas; S3, the swing mechanism (320) drives the nozzle (310) to swing back and forth, and the metal jet is sprayed and deposited onto the top surface of the tray (100) through the nozzle (310), and at the same time, the lifting and rotating device (200) drives the tray (100) to rotate around the central axis and move downward along the central axis; The spray assembly (300) further comprises a swing shaft (330), the swing mechanism (320) is transmission-connected to the swing shaft (330), and the nozzle (310) is mounted on the swing shaft (330).

2. A large diameter metal ingot spray forming equipment according to claim 1, characterized in that: It also includes a spray chamber (400), wherein the nozzle (310) and the tray (100) are arranged in the spray chamber (400).

3. A large diameter metal ingot spray forming equipment according to claim 2, characterized in that: The injection chamber (400) is equipped with a tundish (410), and a plurality of liquid outlets (411) connected to the nozzles (310) are arranged at the bottom of the tundish (410).

4. A large diameter metal ingot spray forming equipment according to claim 2, characterized in that: The swing shaft (330) is a hollow structure and is provided with an air passage communicating with the nozzle (310); both ends of the swing shaft (330) are connected to an air connection hose (331) communicating with the air passage.

5. The large diameter metal ingot spray forming equipment according to claim 1, characterized in that: The swing mechanism (320) adopts a cam driving structure.

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