Multilayer stainless steel shell mold dip-coating device

Abstract

The utility model relates to the technical field of shell-making dip-coating, and discloses a multi-layer stainless steel shell mold dip-coating device which comprises a manipulator and a shell-making device, the shell-making device comprises a dip-coating groove, a fine sand spraying box and a coarse sand spraying box, and the dip-coating groove, the fine sand spraying box and the coarse sand spraying box are all circumferentially arranged around a workbench. The actuator is connected with a clamp in a magnetic attraction mode, and the clamp is provided with fixing grooves matched with different machined parts. According to the utility model, the six-degree-of-freedom manipulator is adopted to drive the wax mould jig to rotate by 360 degrees, so that a coating and a sand layer on the surface of the wax mould are uniformly covered, and the electromagnetic suction type actuator and the clamp adaptive to various jigs are arranged, so that the clamp is quickly replaced, the replacement frequency of the clamp is reduced, and the production efficiency is improved; and a liquid dropping groove and a sand recycling box are arranged, so that slurry and sand are recycled, material waste is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of shell coating technology, and in particular to a multi-layer stainless steel shell coating device. Background Technology

[0002] Lost-wax casting, also known as investment casting, involves the following steps: First, a wax model of the part to be cast is made using wax. After the model is coated with slurry, sand, and dried, a shell is formed on the surface of the model. Then, the model is heated to allow the wax to escape from the gate, forming a hollow shell.

[0003] In the production of stainless steel parts, the wax mold making process is a key step that determines the precision and performance of the casting. Its quality directly affects the forming effect and mechanical properties of the subsequent castings.

[0004] However, existing wax mold shell making devices have defects: First, the robot arm lacks sufficient motion control precision in operations such as dip coating and sanding, and cannot ensure that the coating and sand layer on the wax mold surface are evenly covered. On the other hand, the actuator lacks a convenient replacement structure when faced with diverse wax mold fixtures, and frequent replacement is time-consuming and labor-intensive, reducing production efficiency. In addition, the mechanism for recovering excess slurry after dip coating and sand scattered during sanding is not perfect, resulting in serious material waste and increased production costs. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-layer stainless steel shell type dip coating device, which aims to improve the operating accuracy of the robot, facilitate fixture adaptation, and enable material recycling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-layer stainless steel shell-type dip coating device, comprising a robotic arm and a shell-making device, wherein the robotic arm comprises a worktable, a rotating base, a rotating shaft, a drive motor, a robotic arm rod, a rotating connector, and an actuator; the rotating base is fixedly connected to the worktable, the rotating shaft is rotatably connected to the rotating base, the drive motor is connected to the joint of two adjacent robotic arm rods, the rotating connector is rotatably connected to one end of the robotic arm rod at the end, and the actuator is fixedly connected to the rotating connector;

[0007] The shell-making device includes an immersion coating tank, a fine sand rinsing box, and a coarse sand rinsing box. The immersion coating tank, the fine sand rinsing box, and the coarse sand rinsing box are all arranged circumferentially around the worktable and are spaced at the same distance to meet the working distance of the robot arm. The immersion coating tank is connected to a dripping tank through a connecting pipe.

[0008] As a further description of the above technical solution:

[0009] The actuator is magnetically connected to a clamp and is fixed by electromagnetic attraction.

[0010] As a further description of the above technical solution:

[0011] The fixture is equipped with a fixing groove to accommodate different workpieces.

[0012] As a further description of the above technical solution:

[0013] A filter screen is installed inside the connecting pipe.

[0014] As a further description of the above technical solution:

[0015] The outer surfaces of the fixture and the robotic arm are all treated with anti-corrosion measures.

[0016] As a further description of the above technical solution:

[0017] The dip coating tank and the drip tank are made of corrosion-resistant metal.

[0018] As a further description of the above technical solution:

[0019] Both the fine sand rinsing box and the coarse sand rinsing box are equipped with sand recycling boxes at their bottom.

[0020] As a further description of the above technical solution:

[0021] The robotic arm is a six-degree-of-freedom robotic arm.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a six-degree-of-freedom robot arm is first used. During the dipping and sanding process, the fixture can rotate 360°, so that the coating and sand layer on the surface of the wax model are evenly covered to form a high-quality shell. The robot arm actuator is designed to be electromagnetically attracted. The fixture is equipped with a fixing groove that can be adapted to different wax model fixtures. This makes replacement convenient and does not require frequent fixture replacement, which greatly improves production efficiency.

[0024] 2. In this utility model, a dripping tank is set next to the dipping tank, and a sand recycling box is set below both the fine sand rinsing box and the coarse sand rinsing box, so as to realize the purpose of recycling excess slurry and scattered sand, reducing material waste and lowering production costs. Attached Figure Description

[0025] Figure 1 This is a perspective view of a multi-layer stainless steel shell-type dip coating device proposed in this utility model;

[0026] Figure 2 This is a top view of a multi-layer stainless steel shell-type dip coating device proposed in this utility model;

[0027] Figure 3This is a schematic diagram of a robotic arm for a multi-layer stainless steel shell-type dip coating device proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the fixture for a multi-layer stainless steel shell-type dip coating device proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the dip coating tank of a multi-layer stainless steel shell-type dip coating device proposed in this utility model.

[0030] Legend:

[0031] 1. Workbench; 2. Rotating base; 3. Rotating shaft; 4. Drive motor; 5. Robotic arm lever; 6. Rotating connector; 7. Fixture; 8. Dipping tank; 9. Drip tank; 10. Fine sand rinsing box; 11. Connecting pipe; 12. Actuator; 13. Coarse sand rinsing box; 14. Sand recovery box. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1: Refer to Figure 1-3 A multi-layer stainless steel shell type dip coating device includes a robot and a shell-making device. The robot includes a worktable 1, a rotating base 2, a rotating shaft 3, a drive motor 4, a robot arm 5, a rotating connector 6, and an actuator 12. The rotating base 2 is fixedly connected to the worktable 1, the rotating shaft 3 is rotatably connected to the rotating base 2, the drive motor 4 is connected to the joint of two adjacent robot arm arms 5, the rotating connector 6 is rotatably connected to one end of the end of the robot arm arm 5, and the actuator 12 is fixedly connected to the rotating connector 6.

[0034] The shell-making device includes an immersion coating tank 8, a fine sand rinsing box 10, and a coarse sand rinsing box 13. The immersion coating tank 8, the fine sand rinsing box 10, and the coarse sand rinsing box 13 are all arranged circumferentially around the worktable 1, and the distance between them is the same to meet the working distance of the robot arm. The immersion coating tank 8 is connected to a dripping tank 9 through a connecting pipe 11. The robot arm is a six-degree-of-freedom robot arm. During the immersion coating and sand rinsing process, the robot arm drives the wax model to move. Through the rotating connector 6, the wax model is rotated 360°, so that the coating and sand layer on the surface of the wax model are evenly covered to form a high-quality shell.

[0035] Example 2: Refer to Figure 4The actuator 12 is electromagnetically connected to the clamp 7. The electromagnetic actuator 12 precisely controls the generation, disappearance, and strength of the magnetic field by controlling the on / off state and magnitude of the current. When the clamp 7 approaches the actuator 12, the control system sends a signal to energize the electromagnet and generate a magnetic field, which attracts the clamp 7. When it is necessary to release the workpiece, the control system cuts off the current to the electromagnet, the magnetic field disappears, and the clamp 7 is released, realizing the quick disassembly and replacement of the clamp 7. The clamp 7 is equipped with a fixing groove adapted to different workpieces. The magnetic connection enables the quick replacement of the clamp 7. The fixing groove on the clamp 7 adapted to different workpieces reduces the frequency of clamp 7 replacement.

[0036] Example 3: Reference Figure 5 The dip coating tank 8 is connected to the dripping tank 9 via a connecting pipe 11. A filter screen is installed inside the connecting pipe 11. After dip coating is completed, the robot arm stays above the dripping tank 9 for 3-5 seconds, allowing the excess slurry to drip naturally into the dripping tank 9. The excess slurry is filtered by the filter screen and flows back into the dip coating tank 8, realizing the recycling of excess slurry. A sand recovery box 14 is installed below both the fine sand rinsing box 10 and the coarse sand rinsing box 13. Through the sand recovery box 14, the scattered sand after rinsing is collected in the sand recovery box 14. After screening, this sand can be reused, reducing material waste and lowering production costs.

[0037] Working Principle: Upon startup, the robotic arm operates according to a pre-programmed route. A servo motor inside the worktable 1 works in conjunction with the rotating base 2 and rotating shaft 3 to achieve ±180° rotation of the robotic arm. The angle of the robotic arm is adjusted by the drive motor 4 rotating the robotic arm lever 5. When shelling the wax model is required, the clamp 7 is first magnetically fixed to the actuator 12. Then, the wax model fixture is fixed in the appropriate fixing groove on the clamp 7. The servo motor operates to adjust the angle of the robotic arm. After the wax model fixture is placed in the dipping tank 8, the connecting piece 6 is rotated to ensure even coating with slurry. After dipping, the robotic arm moves to the dripping tank 9 and pauses for 3-5 seconds, allowing excess slurry to drip naturally into the dripping tank 9. Then, the robotic arm moves to the fine sand rinsing box 10 and extends into the box. At this point, the arm rotates... Connector 6 starts to rotate the wax mold dipped in slurry, making the fine sand layer on the surface of the wax mold more evenly covered. After the fine sand coating is completed, the robot moves to the coarse sand coating box 13 and extends into the box. At this time, the rotating connector 6 starts to rotate the wax mold, making the coarse sand layer on the mold surface more evenly covered. When it is necessary to change to a different wax mold fixture 7 for production, an electromagnetic suction actuator 12 is set up. By controlling the on and off of the current and the magnitude, the generation, disappearance and strength of the magnetic field are precisely controlled. When the fixture 7 is close to the actuator 12, the control system sends a signal to energize the electromagnet to generate a magnetic field and attract the fixture 7. When it is necessary to release the workpiece, the control system cuts off the current of the electromagnet, the magnetic field disappears, and the fixture 7 is released, realizing the quick disassembly and replacement of the fixture 7. At this time, the new fixture 7 can be replaced directly for work, improving work efficiency.

[0038] The dip coating tank 8 and the dripping tank 9 are connected by a connecting pipe 11. Excess slurry dripping into the dripping tank 9 can be filtered through the filter screen in the connecting pipe 11 and then flow into the dip coating tank 8, realizing the recycling of slurry. Both the fine sand rinsing box 10 and the coarse sand rinsing box 13 are equipped with sand recovery boxes 14. During the sand rinsing process, the scattered sand is collected in the sand recovery box 14. After screening, this sand can be reused, reducing material waste and lowering production costs.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multilayer stainless steel shell dip coating apparatus comprising a robot and a shell making device, characterized in that: The robotic arm includes a worktable (1), a rotating base (2), a rotating shaft (3), a drive motor (4), robotic arm rods (5), a rotating connector (6), and an actuator (12). The rotating base (2) is fixedly connected to the worktable (1), the rotating shaft (3) is rotatably connected to the rotating base (2), the drive motor (4) is connected to the joints of two adjacent robotic arm rods (5), the rotating connector (6) is rotatably connected to one end of the robotic arm rod (5), and the actuator (12) is fixedly connected to the rotating connector (6). The shell-making device includes an immersion coating tank (8), a fine sand rinsing box (10), and a coarse sand rinsing box (13). The immersion coating tank (8), the fine sand rinsing box (10), and the coarse sand rinsing box (13) are all arranged circumferentially around the workbench (1) and are at the same distance to meet the working distance of the robot arm. The immersion coating tank (8) is connected to a dripping tank (9) through a connecting pipe (11).

2. A multi-ply stainless steel shell dip coater as claimed in claim 1, wherein: The actuator (12) is magnetically connected to the clamp (7) and fixed by electromagnetic attraction.

3. A multi-ply stainless steel shell dip coater as claimed in claim 2, wherein: The fixture (7) is provided with a fixing groove adapted to different workpieces.

4. A multi-ply stainless steel shell dip coater as defined in claim 1, wherein: A filter screen is installed inside the connecting pipe (11).

5. A multi-ply stainless steel shell dip coater as claimed in claim 2, wherein: The outer surfaces of the fixture (7) and the robot arm are all treated with anti-corrosion measures.

6. A multi-ply stainless steel shell dip coater as defined in claim 1, wherein: The dip coating tank (8) and the dripping tank (9) are made of corrosion-resistant metal.

7. A multi-ply stainless steel shell dip coater as defined in claim 1, wherein: A sand recycling box (14) is provided below both the fine sand rinsing box (10) and the coarse sand rinsing box (13).

8. A multi-ply stainless steel shell dip coater as defined in claim 1, wherein: The robotic arm is a six-degree-of-freedom robotic arm.

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