Electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand mold casting

Abstract

The utility model discloses electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand mold casting, and relates to the technical field of pouring equipment, the electromagnetic energy grain refinement movable pouring equipment comprises a moving device, the moving device comprises a moving trolley, the upper end of the moving trolley is provided with a section bar frame and a telescopic lifting device, and the telescopic end of the telescopic lifting device is provided with a lifting frame; the lifting frame is connected to the profile frame in a sliding mode, and a supporting frame is fixed to the lifting frame. The supporting frame is used for fixing a pouring device, the pouring device comprises a pouring box, and a magnetic field generating device is arranged on the outer side of the pouring box; a power supply cabinet is further arranged on the moving trolley and electrically connected with the magnetic field generating device. The position of the pouring box can be adjusted according to the position of a sand mold, the horizontal position of the pouring box can be adjusted through the movable trolley, the vertical position of the pouring box is adjusted through the telescopic lifting device, and finally the pouring box is right opposite to the pouring gate position of the sand mold.

Description

Technical Field

[0001] The utility model relates to the technical field of pouring equipment, in particular to a movable pouring equipment for electromagnetic energy grain refinement used for aluminum alloy sand casting. Background Art

[0002] Cast aluminum alloy has the advantages of low density, high specific strength, wear resistance, corrosion resistance, etc. It also has the characteristics of good fluidity and strong filling ability. It can form parts with complex shapes and is widely used in automobile, machinery, military and other industries.

[0003] Commonly used cast aluminum alloys include aluminum-silicon alloys, aluminum-copper alloys, aluminum-zinc alloys, and aluminum-magnesium alloys. Among them, aluminum-silicon alloys are the most widely used alloys in cast aluminum alloys due to their good casting properties, wear resistance, and small thermal expansion coefficient. They are widely used in structural parts such as housings, cylinders, boxes, and frames.

[0004] Patent No. CN103008623A discloses "a method for refining grains using a strong magnetic field and a dedicated metal solidification casting device thereof", wherein a crucible is located above a casting mold, and a strong magnet is provided on the outside of the crucible. The magnetic field generated by the strong magnet refines the crystals of the metal liquid in the crucible.

[0005] However, in the existing sand casting production process, the refined aluminum alloy melt is poured into the pouring box, and then flows into the mold cavity through the gate rod at the bottom of the pouring box. The pouring box needs to be placed on the sand mold with the help of a bridge crane, and the gate rod at the bottom of the pouring box is aligned with the gate position on the sand mold by visual inspection by the on-site operator. Since the bottom of the pouring box is funnel-shaped and non-planar, it cannot completely contact the top of the sand mold, and the pouring box needs to be supported and leveled. When single-box molding, the sand mold may be higher than the sand box, and the support and leveling of the pouring box is particularly difficult at this time. As a result, the pouring box may tilt during the actual operation. When the pouring box is filled with molten aluminum, it tilts severely, causing the pouring box's gate rod to not be vertically aligned with the gate on the sand mold, resulting in deviation. After the plug of the gate rod is pulled out, the molten aluminum may flow sideways and overflow onto the molding sand outside the gate, not all of which enters the mold cavity. It may even happen that the molten aluminum in the gate solidifies quickly and blocks the gate, and the remaining molten aluminum cannot enter the gate, causing the molten aluminum to spill onto the molding sand, ultimately causing casting failure and other problems. This affects production progress and increases production costs.

[0006] In summary, the existing pouring box is moved by a crane, but its position adjustment is not easy to be fine-tuned and is prone to tilting. Once the gate rod cannot be vertically aligned with the gate position, it will cause a series of adverse effects.

[0007] Therefore, there is an urgent need in the art for an electromagnetic energy grain refinement movable pouring device for aluminum alloy sand casting to solve the above problems. Utility Model Content

[0008] The purpose of the utility model is to provide an electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting, which is used to solve the technical problems existing in the above-mentioned prior art. It can adjust the precise position of the pouring box so that the pouring box can maintain its levelness by itself, and at the same time realize the vertical alignment of the gate rod and the sand mold gate position, so that the pouring box is not easy to tilt.

[0009] To achieve the above purpose, the utility model provides the following solutions:

[0010] The utility model discloses an electromagnetic energy grain refinement movable pouring device for aluminum alloy sand casting, comprising a moving device, the moving device comprising a moving trolley, a profile frame and a telescopic lifting device are installed on the upper end of the moving trolley, a lifting frame is provided at the telescopic end of the telescopic lifting device, the lifting frame is slidably connected to the profile frame, and a support frame is fixed on the lifting frame;

[0011] The support frame is used to fix the pouring device, and the pouring device includes a pouring box, and a magnetic field generating device is arranged on the outer side of the pouring box;

[0012] The mobile vehicle is also provided with a power supply cabinet, and the power supply cabinet is electrically connected to the magnetic field generating device.

[0013] Preferably, a plurality of universal wheels are provided at the lower end of the mobile vehicle.

[0014] Preferably, the telescopic lifting device is a lifting cylinder.

[0015] Preferably, a pulley is respectively provided on both sides of the lifting frame, and a slide groove is respectively provided on both sides of the profile frame, and the two pulleys slide in the two slide grooves respectively.

[0016] Preferably, the magnetic field generating device comprises four groups of magnetic field generating components, each group of the magnetic field generating components comprises a U-shaped iron core, and a group of coils are respectively wound around the two free ends of each of the U-shaped iron cores.

[0017] Preferably, the magnetic field generating assembly is fixed on a shell, the shell is located outside the casting box, and the shell is fixedly connected to the casting box.

[0018] Preferably, a heat insulation plate is provided on the outer wall of the pouring box.

[0019] Preferably, a counterweight is provided at the bottom of the power cabinet.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The utility model can adjust the position of the pouring box as needed. Specifically, the horizontal position of the pouring box can be adjusted by moving the trolley so that the pouring box can be located above the sand mold, and then the height of the pouring box can be adjusted by using the telescopic lifting device so that the lower end gate rod of the pouring box and the upper end gate of the sand mold are aligned. The support frame supports the pouring box during the whole process, which can effectively avoid the problem of the pouring box tilting. The whole equipment is small in size, and the manufacturing and operating costs are low, which is convenient for wide application.

[0022] It can keep the pouring box stable, achieve smooth pouring, and avoid the problem of pouring box deviation. It can also increase the nucleation rate in the melt, promote the grain refinement of the casting, improve the uniformity of the microstructure of the casting, and improve the mechanical properties of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the electromagnetic energy grain refinement movable pouring equipment used for aluminum alloy sand casting according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a moving device in a movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting according to an embodiment of the utility model;

[0026] Figure 3 This is a schematic structural diagram of a pouring device in a movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of a U-shaped iron core in a movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting according to an embodiment of the utility model;

[0028] Figure 5 This is a distribution diagram of the magnetic field direction in a pouring box in a movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting according to an embodiment of the utility model;

[0029] Figure 6 It is a front view of a U-shaped iron core part in a movable pouring device for electromagnetic energy grain refinement used for aluminum alloy sand casting according to an embodiment of the utility model;

[0030] Figure 7 This is a magnetic field distribution diagram of a movable pouring device for electromagnetic energy grain refinement used for aluminum alloy sand casting according to an embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the simulation results of the magnetic field distribution in the pouring box of the movable pouring equipment for electromagnetic energy grain refinement of aluminum alloy sand casting according to the embodiment of the utility model;

[0032] In the figure: 1-mobile device; 101-mobile trolley; 102-profile frame; 103-lifting cylinder; 104-lifting frame; 105-support frame; 106-truss; 2-pouring device; 201-pouring box; 202-U-shaped iron core; 203-coil; 204-housing; 3-sand mold; 4-power cabinet. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The purpose of the utility model is to provide an electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting, which is used to solve the technical problems existing in the above-mentioned prior art. It can adjust the precise position of the pouring box so that the pouring box can maintain its levelness by itself, and at the same time realize the vertical alignment of the gate rod and the sand mold gate position, so that the pouring box is not easy to tilt.

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figure 1-Figure 8 As shown, this embodiment provides a movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting, including a moving device 1, wherein the moving device 1 includes a moving trolley 101, and the moving trolley 101 can move in a plane on the ground. A profile frame 102 and a telescopic lifting device are installed at the upper end of the moving trolley 101, wherein the profile frame 102 includes two vertical beams and a truss 106, and the two ends of the truss 106 are respectively fixed to the upper ends of the two vertical beams. A lifting frame 104 is provided at the telescopic end of the telescopic lifting device, and the lifting frame 104 is slidably connected to the profile frame 102, and a support frame 105 is fixed to the lifting frame 104.

[0037] The support frame 105 is used to fix the pouring device 2, which includes a pouring box 201. A magnetic field generating device is provided on the outer side of the pouring box 201. The magnetic field generating device applies a magnetic field to the aluminum alloy melt, thereby increasing the nucleation rate in the subsequent solidification process and ultimately achieving the purpose of grain refinement.

[0038] The mobile vehicle 101 is also provided with a power supply cabinet 4, which is electrically connected to the magnetic field generating device, so as to supply power to the magnetic field generating device. The power supply cabinet 4 can be used to control and adjust the magnetic field parameters, and the electromagnetic waveform can be selected from different types such as pulse rectangular wave, triangle wave, sine wave, etc. The peak current is adjusted between 100-200A, the frequency is between 20-50Hz, and the duty cycle is between 20%-40%.

[0039] In actual use, the mobile trolley 101 is used to drive the pouring box 201 to move horizontally on the ground until the pouring box 201 moves above the sand mold 3, and then the telescopic lifting device is controlled to drive the pouring box 201 to move downward until the lower end gate rod of the pouring box 201 is aligned with the upper end gate of the sand mold 3, thereby realizing the positioning function of the pouring box 201, and due to the supporting function of the support frame 105, the pouring box 201 will not be tilted.

[0040] Then, pouring can be carried out. First, a stopper rod is inserted into the pouring box 201 to block the lower gate rod of the pouring box 201, and then the aluminum alloy melt is poured into the pouring box 201. The magnetic field generating device is turned on to perform electromagnetic energy treatment on the aluminum alloy melt in the pouring box 201. After a few minutes, the stopper rod is pulled out to allow the aluminum alloy melt in the pouring box 201 to flow into the sand mold 3.

[0041] In this embodiment, a plurality of universal wheels are provided at the lower end of the mobile cart 101 , and in actual use, the specific position of the mobile cart 101 can be adjusted by a staff member pushing the mobile cart 101 .

[0042] In this embodiment, the telescopic lifting device is a lifting cylinder 103, the two air holes of the lifting cylinder 103 are connected to the solenoid valve through the air pipe, and the air inlet of the solenoid valve is connected to the air source, which are all existing technologies, so they are not described in detail here. Of course, those skilled in the art can also replace it with a hydraulic cylinder or an electric telescopic rod, as long as the telescopic effect can be achieved.

[0043] In this embodiment, a pulley is provided on both sides of the lifting frame 104, and a slide groove is provided on both sides of the profile frame 102. The two pulleys slide in the two slide grooves respectively, so as to reduce the friction between the lifting frame 104 and the profile frame 102 during the lifting process. In addition, a U-shaped limit plate is provided at both ends of the lifting frame 104, and the middle cavity of the U-shaped limit plate is used for the vertical beam to pass through, so as to limit the lifting frame 104 and avoid the problem of displacement during the lifting process.

[0044] In this embodiment, the magnetic field generating device includes four groups of magnetic field generating components, which are respectively located at four sides of the pouring box 201. Each group of magnetic field generating components includes a U-shaped iron core 202, and a group of coils 203 are respectively sleeved on the two free ends of each U-shaped iron core 202, and the cross-sections of the two free ends of the U-shaped iron core 202 are rectangular. The relevant dimensions of the U-shaped iron core 202 and the coil 203 are as follows:

[0045] The cross-sectional dimensions of one free end of the U-shaped core 202 are (100-130)×(80-90)×(120-150) mm, the spacing between the two free ends of the U-shaped core 202 is 350-600 mm, the distance between the free end face of the U-shaped core 202 and the surface of the coil 203 is 15-20 mm, and the distance between the free end face of the U-shaped core 202 and the outer surface of the casting box 201 is 15-20 mm.

[0046] The number of layers of the coil 203 distributed along its radial direction is 8-10 layers, the number of turns of the coil 203 distributed along its axial direction is 10-12 turns, the cross-section of the wire connected to the coil 203 is rectangular, and the cross-sectional size of the wire connected to the coil 203 is 5mm×10mm. Of course, those skilled in the art can also replace it with a wire with a circular cross-section.

[0047] In this embodiment, if Figure 1 and Figure 3 As shown, the magnetic field generating assembly is fixed on the housing 204, the housing 204 is located outside the pouring box 201, and the housing 204 is fixedly connected to the pouring box 201. Specifically, the housing 204 and the pouring box 201 can be an integrated structure, and the four sets of magnetic field generating assemblies are fixed on the four inner walls of the housing 204 respectively.

[0048] In this embodiment, a heat insulation board is provided on the outer wall of the pouring box 201, and the heat insulation board is made of nano-insulation material. It has two functions: first, to prevent the temperature of the aluminum alloy liquid in the pouring box 201 from being transferred to the U-shaped iron core 202 to prevent the U-shaped iron core 202 from overheating; second, to prevent the temperature of the aluminum alloy liquid in the pouring box 201 from dropping.

[0049] In this embodiment, a counterweight is provided at the bottom of the power cabinet 4 to prevent the pouring device 2 from being too heavy, which would cause the mobile trolley 101 to tip over due to uneven weight at the front and rear ends.

[0050] In this embodiment, the various index parameters in the pouring device 2 are as follows:

[0051] The inner wall size of the pouring box 201 is 770×650×350 mm, the mass of the aluminum liquid in the pouring box 201 is 350-400 kg, and the mass of the entire pouring device 2 is 655 kg;

[0052] The dimensions of the housing 204 are 1300×1200×400 mm;

[0053] The support frame 105 includes two support plates, the center distance between the two support plates is 600mm, the length of each support plate is 1070mm, and the lifting height of the support plate driven by the lifting cylinder 103 is 90-1600mm, the lifting speed is 20mm / s, and the descending speed is 5mm / s;

[0054] The speed of the mobile trolley 101 pushed by a person is 1.0 m / s, and the rated load of the mobile trolley 101 is 2T;

[0055] The mass of the power cabinet 4 is 300 kg.

[0056] This embodiment provides actual experimental parameters of an electromagnetic energy grain refinement movable pouring device for aluminum alloy sand casting, which are as follows:

[0057] The inner wall size of the casting box 201 is 770×650×350mm, the cross-sectional size of the wire connected to the coil 203 is 5×10mm, the radial layer number of the coil 203 is 8 layers, the axial number of turns of the coil 203 is 10 turns, the cross-sectional size of the free end of the U-shaped iron core 202 is 100×80×120mm, the distance between the two free ends of the U-shaped iron core 202 is 350mm, the distance between the side of the coil 203 close to the free end of the U-shaped iron core 202 and the free end of the U-shaped iron core 202 is 15mm, and the distance between the free end of the U-shaped iron core 202 and the casting box 201 is 15mm. The magnetic field distribution around the casting box 201 is simulated by finite element software, as shown in FIG. Figure 7-Figure 8 shown.

[0058] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A movable pouring device for electromagnetic energy grain refinement of aluminum alloy sand casting, characterized in that: The mobile device comprises a mobile trolley, a profile frame and a telescopic lifting device are installed on the upper end of the mobile trolley, a lifting frame is provided at the telescopic end of the telescopic lifting device, the lifting frame is slidably connected to the profile frame, and a support frame is fixed on the lifting frame; The support frame is used to fix the pouring device, and the pouring device includes a pouring box, and a magnetic field generating device is arranged on the outer side of the pouring box; The mobile vehicle is also provided with a power supply cabinet, and the power supply cabinet is electrically connected to the magnetic field generating device.

2. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1 is characterized in that: The lower end of the mobile trolley is provided with a plurality of universal wheels.

3. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1 is characterized in that: The telescopic lifting device is a lifting cylinder.

4. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1 is characterized in that: A pulley is respectively arranged on both sides of the lifting frame, and a slide groove is respectively arranged on both sides of the profile frame, and the two pulleys slide in the two slide grooves respectively.

5. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1 is characterized in that: The magnetic field generating device comprises four groups of magnetic field generating components, each group of the magnetic field generating components comprises a U-shaped iron core, and a group of coils are respectively wound around the two free ends of each of the U-shaped iron cores.

6. The electromagnetic energy grain refinement movable pouring device for aluminum alloy sand casting according to claim 5, characterized in that: The magnetic field generating assembly is fixed on a shell, the shell is located outside the pouring box, and the shell is fixedly connected to the pouring box.

7. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1, characterized in that: A heat insulation board is arranged on the outer wall of the pouring box.

8. The electromagnetic energy grain refinement movable pouring equipment for aluminum alloy sand casting according to claim 1, characterized in that: A counterweight is provided at the bottom of the power cabinet.

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