A powder feeding device for magnetic powder green bodies

Abstract

The application relates to a feeding device for magnetic powder green bodies, which comprises a rotating driving mechanism, a clamping driving mechanism, two clamping arms and a floating mechanism arranged between the rotating driving mechanism and the clamping driving mechanism; the two clamping arms are driven to open / close by the clamping driving mechanism, the clamping driving mechanism is connected with the floating mechanism, the rotating driving mechanism drives the combination of the floating mechanism, the clamping driving mechanism and the clamping arms to rotate, so that the two clamping arms rotate from a vertical parallel state to a horizontal up-down state, or the two clamping arms rotate from the horizontal up-down state to the vertical parallel state. The shortcomings that the prior art cannot clamp large-volume and heavy magnetic powder green bodies are overcome.

Description

Technical Field

[0001] This invention relates to the field of metallurgical powder forming press technology, and in particular to a feeding device for magnetic powder green blanks. Background Technology

[0002] Sintered NdFeB is a rare earth permanent magnet material manufactured using powder metallurgy technology. It is widely used in various industrial motors, including those used in new energy vehicles, power tools, electric bicycles, air conditioning compressors, and aerospace.

[0003] In the field of powder metallurgy, robotic arms are commonly used to automate the loading and unloading of powder metallurgy products during production, thereby greatly improving work efficiency. However, powder metallurgy products have low strength and are easily deformed under stress before sintering. Therefore, controlling the clamping force of the robotic gripper's jaws to hold the green product and prevent deformation is the key to the automatic loading of the robotic arm.

[0004] Chinese utility model patent CN213765898U discloses a pneumatic gripper for controlling the clamping force of powder metallurgy green products. The gripper includes a proportional valve, a cylinder, a first gripper structure, and a second gripper structure. The first and second gripper structures are identical, including a gripper support and a gripper head structure. After the powder metallurgy press produces the green product, a robotic arm drives the gripper to a designated position. The cylinder then drives the first and second gripper structures to move in opposite directions, thereby gripping the green product. After the robotic arm has gripped the green product to the designated position, the cylinder drives the first and second gripper structures to move in opposite directions, releasing the green product. The proportional valve automatically adjusts the air pressure intensity according to the type of green product being gripped, thereby improving the gripping capacity.

[0005] However, this technical solution can only be used for small-sized green blanks with a diameter of less than 80 mm, a thickness of less than 40 mm, and a weight of no more than 2 kg. When used for large-volume green blanks with a diameter of more than 100 mm, a thickness of more than 45 mm, and a weight of more than 5 kg, the green blanks will slip due to their own weight. If the clamping force is increased, the green blanks will be damaged. Summary of the Invention

[0006] The purpose of this invention is to provide a feeding device for magnetic powder green blanks, which overcomes the shortcomings of existing technologies that cannot transfer or clamp large-volume, heavy magnetic powder green blanks.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A feeding device for magnetic powder preforms includes a rotary drive mechanism, a clamping drive mechanism, two clamping arms, and a floating mechanism disposed between the rotary drive mechanism and the clamping drive mechanism. The two clamping arms are driven to open / close with each other by a clamping drive mechanism. The clamping drive mechanism is connected to the floating mechanism. The rotation drive mechanism drives the combination of the floating mechanism, the clamping drive mechanism and the clamping arms to rotate, so that the two clamping arms rotate from a vertically parallel state to a horizontally up-and-down state, or so that the two clamping arms rotate from a horizontally up-and-down state to a vertically parallel state. The floating mechanism includes a bottom plate, a float plate, a cover plate, and elastic elements. A cover plate is provided on each side of the bottom plate. The float plate is slidably connected to the bottom plate and slides between the two cover plates. Elastic elements are provided between the two sides of the float plate and the cover plates. The clamping drive mechanism is connected to the floating plate, and the rotation drive mechanism is connected to the bottom plate.

[0008] The base plate is equipped with a sliding groove, and the floating plate is equipped with a protruding sliding strip, which is set inside the sliding groove.

[0009] The bottom plate is provided with two parallel sliding grooves, and the float plate is provided with two parallel sliding strips accordingly; elastic elements are provided between the two ends of the sliding strips of the float plate and the cover plate, with two elastic elements provided on each side.

[0010] The elastic element is a spring.

[0011] The rotary drive mechanism is a rotary cylinder, and the clamping drive mechanism is a clamping cylinder.

[0012] The clamp arm is equipped with a removable tray.

[0013] A removable tray is installed on the clamp arm that rotates to the bottom.

[0014] The tray has a slot, and the clamping arm is inserted into the slot of the tray.

[0015] The advantages of this invention are: 1. The rotary drive mechanism prevents the feeding device from always clamping the green billet in a vertical position, effectively avoiding slippage due to the excessive weight of the green billet itself; 2. The floating mechanism is equipped with sliding floats with springs on both sides, ensuring that the clamping arms do not clamp the green billet abruptly, allowing both clamping arms to clamp the green billet simultaneously on both sides, preventing the green billet from moving and being damaged due to one clamping arm contacting the green billet first; 3. The detachable pallet provides support for the green billet after the feeding device rotates, and the large area of ​​the pallet can be used to support heavy and large-volume green billets, effectively protecting the integrity of the green billet and ensuring stability during transport; 4. Because the pallet is detachable, it can be set to various sizes to accommodate green billets of different specifications, facilitating the production of green billets of different specifications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the floating mechanism structure of the present invention; Figure 3This is an exploded view of the structure of the present invention; In the diagram: 1-rotation drive mechanism; 2-clamping drive mechanism; 3-floating mechanism; 31-base plate; 32-floating plate; 33-cover plate; 34-spring; 4-clamping arm; 5-support plate. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0018] To simplify the description of this embodiment, some components that are well-known to those skilled in the art but are not related to the main content of this invention may be omitted in the accompanying drawings or description. Additionally, for ease of description, some components in the drawings may be omitted, enlarged, or reduced, but these do not represent the actual product dimensions or the complete structure.

[0019] This invention discloses a feeding device for magnetic powder green bodies, such as... Figure 1-3 As shown, it includes a rotary drive mechanism 1, a clamping drive mechanism 2, two clamping arms 4, and a floating mechanism 3 disposed between the rotary drive mechanism 1 and the clamping drive mechanism 2; The two clamping arms 4 are driven by the clamping drive mechanism 2 to open / close with each other to clamp and transfer the magnetic powder green blank, and to release the clamped green blank.

[0020] like Figure 1 , Figure 3 As shown, the clamping drive mechanism 2 is connected to the floating mechanism 3. After the clamping arm 4 clamps the green billet, the rotary drive mechanism 1 drives the combination of the floating mechanism 3, the clamping drive mechanism 2, and the clamping arm 4 to rotate, so that the two clamping arms 4 rotate from a vertically parallel state to a horizontally up-down state. In this way, the state of vertically clamping the green billet is changed to a state of lifting the green billet, eliminating the possibility of the green billet slipping out of the clamping arm 4 due to its own weight, and ensuring the integrity and stability of the green billet during the transfer process. When the green billet is transferred to the destination, the rotary drive mechanism 1 drives the combination of the floating mechanism 3, the clamping drive mechanism 2, and the clamping arm 4 to rotate in the opposite direction, so that the two clamping arms 4 rotate from a horizontally up-down state to a vertically parallel state, releasing the green billet and placing it in the specified position, thereby completing the transfer of the green billet.

[0021] Preferably, the rotary drive mechanism 1 is a rotary cylinder, and the clamping drive mechanism 2 is a clamping cylinder.

[0022] The clamping arm 4 is equipped with a detachable pallet 5. Thus, this invention can be used not only for handling and transferring large-volume, heavy-weight green blanks, but also for handling and transferring regular green blanks. When used for handling and transferring regular green blanks, the pallet 5 can be removed. Of course, various sizes and specifications of detachable pallets 5 can also be prepared to accommodate different sizes of green blanks, facilitating the replacement of different sized pallets 5 for different sizes of green blanks.

[0023] It is not necessary to install the tray 5 on both clamping arms 4; a removable tray 5 can be installed only on the lower clamping arm 4 after rotation.

[0024] To facilitate the disassembly of the tray 5, the tray 5 is provided with a slot that is adapted to the width and thickness of the clamping arm 4. The clamping arm 4 can be directly inserted into the slot of the tray 5, making it more convenient to replace the tray 5.

[0025] like Figure 2 , Figure 3 As shown, a floating mechanism 3 is also provided between the rotary drive mechanism 1 and the clamping drive mechanism 2. The floating mechanism 3 includes a base plate 31, a float plate 32, a cover plate 33, and elastic elements 34. A cover plate 33 is provided on each side of the base plate 31. The base plate 31 has a sliding groove, and the float plate 32 has a protruding sliding strip disposed within the sliding groove. The float plate 32 is slidably connected to the base plate 31 and slides between the two cover plates 33. Preferably, the base plate 31 has two parallel sliding grooves, and the float plate 32 has two corresponding parallel sliding strips. Elastic elements 34 are provided between the two sides of the float plate 32 and the cover plates 33. The elastic elements 34 are disposed between the ends of the sliding strips of the float plate 32 and the cover plates 33, with two elastic elements 34 on each side. The elastic elements 34 are typically springs. The clamping drive mechanism 2 is connected to the float plate 32, and the rotary drive mechanism 1 is connected to the base plate 31.

[0026] When clamping a green blank, the green blank ejected from the mold cannot always be positioned exactly in the middle of the two clamping arms 4, so that the two clamping arms 4 can simultaneously clamp both sides of the green blank. If the green blank is ejected and deviates to one side, one clamping arm 4 will touch the green blank first. During the clamping process, the green blank will inevitably move laterally, which may damage the green blank. To solve this problem, the present invention sets a floating mechanism 3 between the rotary drive mechanism 1 and the clamping drive mechanism 2. The function of the floating mechanism 3 is that when the clamping arms 4 clamp the green blank, if one clamping arm 4 touches the green blank before the other clamping arm 4, the floating plate 32 slides on the base plate 31 under the elastic force of the spring, so that the other clamping arm 4 is close to the green blank, so that the green blank is subjected to uniform force and the clamping is stable, and the green blank will not move. This prevents the green blank from being displaced and damaged by the contact of one clamping arm 4.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made within the scope of the claims of this invention should be considered within the technical scope of this invention.

Claims

1. A feeding device for magnetic powder green bodies, characterized in that: It includes a rotary drive mechanism (1), a clamping drive mechanism (2), two clamping arms (4), and a floating mechanism (3) disposed between the rotary drive mechanism (1) and the clamping drive mechanism (2). The two clamping arms (4) are driven to open / close with each other by the clamping drive mechanism (2). The clamping drive mechanism (2) is connected to the floating mechanism (3). The rotation drive mechanism (1) drives the combination of the floating mechanism (3), the clamping drive mechanism (2) and the clamping arms (4) to rotate, so that the two clamping arms (4) rotate from the vertical parallel state to the horizontal up-down state, changing the vertical clamping state of the green billet to the state of lifting the green billet, eliminating the possibility of the green billet slipping out of the clamping arms (4) due to its own weight; or, the two clamping arms (4) rotate from the horizontal up-down state to the vertical parallel state, releasing the green billet and placing it in the specified position, thereby completing the transfer of the green billet; The clamping arm (4) is provided with a removable tray (5), and the removable tray (5) is provided on the clamping arm (4) rotated to the lower position; the tray (5) is provided with a slot, and the clamping arm (4) is inserted into the slot of the tray (5); The floating mechanism (3) includes a bottom plate (31), a float plate (32), a cover plate (33) and an elastic element (34). A cover plate (33) is provided on each side of the bottom plate (31). The float plate (32) is slidably connected to the bottom plate (31) and slides between the two cover plates (33). An elastic element (34) is provided between the two sides of the float plate (32) and the cover plate (33). The clamping drive mechanism (2) is connected to the floating plate (32), and the rotation drive mechanism (1) is connected to the bottom plate (31).

2. The feeding device for magnetic powder green preforms according to claim 1, characterized in that: The bottom plate (31) is provided with a sliding groove, and the floating plate (32) is provided with a protruding sliding strip, which is set in the sliding groove.

3. The feeding device for magnetic powder green preforms according to claim 2, characterized in that: The bottom plate (31) is provided with two parallel sliding grooves, and the float plate (32) is provided with two parallel sliding strips accordingly; elastic elements (34) are provided between the two ends of the sliding strips of the float plate (32) and the cover plate (33), and two elastic elements (34) are provided on each side.

4. The feeding device for magnetic powder green preforms according to claim 3, characterized in that: The elastic element (34) is a spring.

5. The feeding device for magnetic powder preforms according to claim 1, characterized in that: The rotary drive mechanism (1) is a rotary cylinder, and the clamping drive mechanism (2) is a clamping cylinder.

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