A non-ferrous metal casting processing and melting equipment

Abstract

This application discloses a non-ferrous metal casting processing and melting equipment, including a fixed frame. A guide pipe extending into a mold cavity structure on the top of the fixed frame is fixedly installed at one end. A rack arranged along its central axis is provided on one side of the outer surface of the guide pipe, and the rack is connected to a stepper motor fixedly installed on one side of the top of the fixed frame. A connecting groove is provided on the other side of the guide pipe, and a guide block is fixedly installed in the middle of the top of the fixed frame. The design of the guide pipe and its structure allows for precise delivery of molten metal to a specific position within the mold cavity structure, preventing excessive flow on the inner wall of the mold cavity structure, which could lead to rapid temperature decay or a large temperature gradient within the mold. This effectively improves the forming quality of the casting and the service life of the mold.

Description

Technical Field

[0001] This application relates to the field of melting and casting equipment technology, and in particular to a melting and casting equipment for processing non-ferrous metal castings. Background Technology

[0002] Melting and casting is a technology that involves melting materials at high temperatures and then casting them directly into a mold. As a simple and mature process, castings have a short production cycle and low cost, and are widely used in various machining fields.

[0003] To ensure the accuracy and quality of castings, the flow state of the molten metal is subject to high requirements. However, when the molten metal is filled into the mold, the liquid that first enters the mold will flow in its cavity. Due to the temperature difference between the mold and the molten liquid, its temperature will drop rapidly and solidify. It will be incompatible with the molten metal that enters later and separate, which will seriously affect the forming quality and accuracy of the casting.

[0004] Furthermore, the small-scale flow of high-temperature molten metal in the mold cavity can easily lead to a large temperature gradient difference inside the mold, which in turn can cause cracking under the action of thermal expansion and contraction. This not only affects the molding quality of the casting, but also greatly reduces the service life of the mold, resulting in poor stability and reliability.

[0005] Therefore, there is an urgent need for a casting equipment for casting processing to solve the defects of the existing casting process in actual operation. Summary of the Invention

[0006] This application proposes a non-ferrous metal casting processing melting and casting equipment, which has the advantage of filling the mold cavity with molten metal in a non-contact manner, so that the temperature of the molten metal flowing into the mold cavity first does not decrease rapidly, thereby preventing a large temperature gradient difference inside the mold and causing it to crack. This solves the problems of short service life and poor forming quality of existing molds.

[0007] To achieve the above objectives, this application adopts the following technical solution: a non-ferrous metal casting processing melting and casting equipment, including a fixed frame, wherein the interior of the fixed frame is provided with a mold consisting of two sets of melting and casting molds fixedly connected by bolts to form a cavity structure, a guide pipe extending into the cavity structure of the mold on the fixed frame is fixedly installed at the top of the fixed frame, a rack arranged along its central axis is provided on one side of the outer surface of the guide pipe, and the rack is connected to a stepper motor fixedly installed on one side of the top of the fixed frame, and a connecting groove is provided on the other side of the guide pipe, and a guide block is fixedly installed in the middle of the top of the fixed frame and connected to its inner cavity through the connecting groove on the guide pipe.

[0008] Furthermore, a control system is fixedly installed on the other side of the top of the fixed frame, and a feedback connection is formed between the control system and the stepper motor.

[0009] Furthermore, the speed at which the control system controls the stepper motor to drive the guide tube upward is inversely proportional to the cross-sectional area of ​​the cavity structure inside the mold that is parallel to the bottom end of the guide tube.

[0010] Furthermore, the bottom end of the guide tube is always higher than the liquid level of the molten metal filled in the cavity structure inside the mold, and the height difference between them is determined by the fluidity of the molten metal and the vibration waveform generated when it is impacted.

[0011] Furthermore, an inner connecting rod extending to the top of the guide tube is movably sleeved inside the guide tube. A hydraulic cylinder is fixedly installed in the middle of the top of the fixed frame via a fixed support rod and is fixedly connected to the top of the inner connecting rod. A set of limiting blocks a and limiting blocks b are respectively provided on the left and right sides of the bottom of the outer surface of the inner connecting rod, and limiting blocks a and limiting blocks b are respectively located on the upper and lower sides of the guide block. An elastic shaft extending to the bottom of the cavity structure of the casting mold is fixedly installed in the middle of the top of the fixed frame.

[0012] Furthermore, the hydraulic cylinder is connected to an external hydraulic pump station and forms a feedback connection with the control system. When the guide pipe moves to the uppermost position, the hydraulic pump station is activated to drive the inner connecting rod to move downward to block the guide block.

[0013] Furthermore, the outer diameter of the inner connecting rod is smaller than the inner diameter of the guide tube, while the outer diameters of the limiting block a and the limiting block b are equal to the inner diameter of the guide tube.

[0014] 1. The non-ferrous metal casting processing melting and casting equipment provided in this application, with the setting of the guide pipe and its upper structure, can accurately deliver the molten metal to a specific position in the cavity structure of the mold, so that it will not generate a large range of flow on the inner wall of the cavity structure of the mold, which would lead to the problem of excessive temperature decay or large temperature difference gradient inside the mold, thereby effectively improving the forming quality of the casting and the service life of the mold.

[0015] 2. The non-ferrous metal casting processing melting and casting equipment provided in this application, with the setting of the inner connecting rod and its structure on the guide pipe, when the guide pipe moves to the uppermost position, the hydraulic pump station is started to drive the inner connecting rod to move downward to block the guide block. In turn, in conjunction with the elastic shaft, while applying pressure to the molten metal filling the cavity structure of the mold, the leakage of the molten metal remaining in the guide block can be avoided, which effectively improves the stability and reliability of the melting and casting equipment during use. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0017] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a front view of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the guide tube of the present invention;

[0021] Figure 4 This is a top view of the guide tube of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal connecting rod of the present invention.

[0023] In the diagram: 1. Fixed frame; 2. Casting mold; 3. Guide pipe; 4. Rack; 5. Stepper motor; 6. Guide block; 7. Control system; 8. Fixed support rod; 9. Hydraulic cylinder; 10. Elastic shaft; 11. Inner connecting rod; 12. Connecting groove; 13. Limiting block a; 14. Limiting block b. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] like Figures 1-2As shown, a non-ferrous metal casting processing melting and casting equipment includes a fixed frame 1 fixedly installed on a workbench. Inside the fixed frame 1 is a mold with a specific cavity structure formed by two sets of casting molds 2 fixedly connected by bolts. A guide pipe 3 extending into the cavity structure of the mold is fixedly installed at the top of the fixed frame 1, thereby accurately conveying molten metal to a specific position within the cavity structure of the mold, preventing excessive flow on the inner wall of the cavity structure, which could lead to excessively rapid temperature decay or a large temperature gradient within the mold. Simultaneously, the high-temperature molten metal conveyed in the guide pipe 3, under the effect of thermal diffusion, can preheat the cavity structure within the mold. A rack 4 arranged along its central axis is provided on one side of the outer surface of the guide pipe 3, and the rack 4 is connected to a stepper motor 5 fixedly installed on one side of the top of the fixed frame 1. Thus, under the transmission action between the rack 4 and the stepper motor 5, the guide pipe 3 can move up and down accordingly. Figure 4 As shown, a connecting groove 12 along its central axis is provided on the other side of the guide pipe 3. A guide block 6 is fixedly installed in the middle of the top of the fixed frame 1 and is connected to its inner cavity through the connecting groove 12 on the guide pipe 3. This allows the molten metal to be transported into the cavity structure of the mold and solidified in the cavity structure formed by the casting mold 2.

[0026] In this technical solution, a control system 7 is fixedly installed on the other side of the top of the fixed frame 1, and the control system 7 and the stepper motor 5 form a feedback connection to control the rotation direction and speed of the stepper motor 5.

[0027] In this technical solution, the speed at which the stepper motor 5 drives the guide tube 3 to move upward is inversely proportional to the cross-sectional area of ​​the cavity structure inside the mold that is parallel to the bottom end of the guide tube 3. Furthermore, the trajectory of the inner wall of the cavity structure of the mold is transmitted to the control system 7 before casting.

[0028] When the cross-sectional area of ​​the cavity structure inside the mold formed by the casting mold 2 increases, the speed at which the stepper motor 5 drives the guide pipe 3 to move upward is reduced according to the constant rheology of the molten metal flowing through the guide pipe 3 per unit time, thereby effectively reducing the impact force of the molten metal conveyed therein on the molten metal filling the cavity structure of the mold.

[0029] When the cross-sectional area of ​​the cavity structure inside the mold formed by the casting mold 2 decreases, the speed at which the stepper motor 5 drives the guide pipe 3 to move upward is increased according to the constant rheological change of the molten metal flowing through the guide pipe 3 per unit time, thereby preventing the bottom end of the guide pipe 3 from contacting the molten metal filled in the cavity structure of the mold.

[0030] In this technical solution, the bottom end of the guide pipe 3 is always higher than the liquid level of the molten metal filled in the cavity structure of the mold, and the height difference between them is determined by the fluidity of the molten metal and the vibration waveform generated when it is impacted. This further avoids the problem of the molten metal filled in the cavity structure of the mold coming into contact with the bottom end of the guide pipe 3. At the same time, the molten metal filled in the cavity structure of the mold buffers the impact force of the molten metal transported in the guide pipe 3 when it falls, and prevents it from having a strong impact on the inner wall of the cavity structure of the mold. This results in the casting equipment having a better filling flow state for the mold.

[0031] like Figure 1 , Figure 3 as well as Figure 5 As shown, in this technical solution, an inner connecting rod 11 extending to the top of the guide tube 3 is movably sleeved inside the guide tube 3. A hydraulic cylinder 9 is fixedly installed in the middle of the top of the fixed frame 1 via a fixed support rod 8 and is fixedly connected to the top of the inner connecting rod 11. The hydraulic cylinder 9 controls the up and down movement of the inner connecting rod 11 on the guide tube 3, thereby controlling the flow rate of the molten metal conveyed by the guide block 6 to the inner cavity of the guide tube 3. On the left and right sides of the bottom of the outer surface of the inner connecting rod 11, there are a set of mutually staggered semi-circular limiting blocks a13 and b14, respectively. The limiting blocks a13 and b14 are located on the upper and lower sides of the guide block 6, respectively. An elastic shaft 10 extending to the bottom of the cavity structure of the casting mold 2 is fixedly installed in the middle of the top of the fixed frame 1. The elastic shaft 10 is used to control the pressure of the inner connecting rod 11 on the molten metal filling the mold cavity when the inner connecting rod 11 moves downward, thereby further improving the molding quality of the casting.

[0032] In this technical solution, the hydraulic cylinder 9 is connected to the external hydraulic pump station and forms a feedback connection with the control system 7. When the guide pipe 3 moves to the uppermost position, the hydraulic pump station is activated to drive the inner connecting rod 11 to move downward to block the guide block 6. In turn, in conjunction with the elastic shaft 10, while applying pressure to the molten metal filling the cavity structure of the mold, the leakage of the molten metal remaining in the guide block 6 can be avoided.

[0033] In this technical solution, the outer diameter of the inner connecting rod 11 is smaller than the inner diameter of the guide tube 3, while the outer diameters of the limiting block a13 and the limiting block b14 are equal to the inner diameter of the guide tube 3, thereby forming a gap between the outer surface of the inner connecting rod 11 and the inner wall of the guide tube 3 to allow the molten metal to flow.

Claims

1. A non-ferrous metal casting processing and melting equipment, comprising a fixed frame (1), wherein the fixed frame (1) is provided with a mold having an internal cavity structure formed by two sets of melting molds (2) fixedly connected by bolts, characterized in that: A guide tube (3) is fixedly installed at the top of the fixed frame (1) and extends into the cavity structure of the mold on the fixed frame (1). A rack (4) is provided on one side of the outer surface of the guide tube (3) along its central axis, and the rack (4) is connected to a stepper motor (5) fixedly installed on one side of the top of the fixed frame (1). A connecting groove (12) is provided on the other side of the guide tube (3). A guide block (6) is fixedly installed in the middle of the top of the fixed frame (1) and is connected to its inner cavity through the connecting groove (12) on the guide tube (3). A control system (7) is fixedly installed on the other side of the top of the fixed frame (1), and a feedback connection is formed between the control system (7) and the stepper motor (5). The speed at which the stepper motor (5) drives the guide tube (3) to move upward is inversely proportional to the cross-sectional area of ​​the cavity structure inside the mold that is parallel to the bottom end of the guide tube (3). The bottom end of the guide tube (3) is always higher than the liquid level of the molten metal filled in the cavity structure inside the mold, and the drop between them is determined by the fluidity of the molten metal and the vibration waveform generated when it is impacted. The guide tube (3) is movably sleeved with an inner connecting rod (11) extending to the top of the guide tube (3). The middle of the top of the fixed frame (1) is fixedly installed with a hydraulic cylinder (9) by a fixed support rod (8) and fixedly connected to the top of the inner connecting rod (11). A set of limiting blocks a (13) and limiting blocks b (14) are respectively provided on the left and right sides of the bottom of the outer surface of the inner connecting rod (11), and the limiting blocks a (13) and limiting blocks b (14) are respectively located on the upper and lower sides of the guide block (6). An elastic shaft (10) extending to the bottom of the cavity structure of the casting mold (2) is fixedly installed in the middle of the top of the fixed frame (1). The hydraulic cylinder (9) is connected to the external hydraulic pump station and forms a feedback connection with the control system (7). When the guide pipe (3) moves to the uppermost position, the hydraulic pump station is started to drive the inner connecting rod (11) to move downward to block the guide block (6).

2. The non-ferrous metal casting processing and melting equipment according to claim 1, characterized in that, The outer diameter of the inner connecting rod (11) is smaller than the inner diameter of the guide tube (3), while the outer diameters of the limiting block a (13) and the limiting block b (14) are equal to the inner diameter of the guide tube (3).

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