Feeding device for magnetic powder green bodies

Abstract

The invention relates to a feeding device for magnetic powder green bodies. The feeding device comprises a rotary driving mechanism, a clamping driving mechanism, two clamping arms and a floating mechanism arranged between the rotary driving mechanism and the clamping driving mechanism. The two clamping arms are driven by the clamping driving mechanism to be mutually opened / closed, the clamping driving mechanism is connected with the floating mechanism, and the rotary driving mechanism drives a combination body 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 of the two clamping arms, or the two clamping arms rotate from a horizontal up-down state to a horizontal up-down state of the two clamping arms. And the two clamping arms are rotated from a horizontal up-down state to a vertical parallel state. The defect that in the prior art, large-size and large-weight magnetic powder green bodies cannot be clamped is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical powder forming presses, in particular to a feeding device for magnetic powder green compacts. Background Art

[0002] Sintered NdFeB is a rare earth permanent magnet material manufactured using the principle of powder metallurgy. The product is widely used in various industrial motors including new energy vehicles, power tools, electric bicycles, air-conditioning compressors, aerospace and other fields.

[0003] In the field of powder metallurgy, robots are usually used to achieve automatic loading and unloading in the production process of powder metallurgy products, thereby greatly improving work efficiency. However, powder metallurgy products have low strength before sintering and are easily deformed by force, so how to control the clamping force of the robot gripper to clamp the green product so that it does not deform becomes the key to automatic unloading of the robot.

[0004] The Chinese utility model patent with the authorization announcement number CN213765898U discloses a pneumatic clamp for controlling the clamping force of a powder metallurgy green product, including a proportional valve, a cylinder, a first clamp structure and a second clamp structure; the first clamp structure and the second clamp structure are the same, including a clamp bracket and a clamp head structure. After the powder metallurgy press presses the green product, the manipulator drives the clamp to the specified position, and the cylinder drives the first clamp structure and the second clamp structure to move toward each other, thereby grabbing the green product; after the manipulator grabs the green product to the specified position, the cylinder drives the first clamp structure and the second clamp structure to move in the opposite direction to release the green product. The proportional valve automatically adjusts the air pressure intensity when the clamp is grabbing according to the type of green product being grabbed, thereby improving the grabbing ability.

[0005] However, this technical solution can only be used for small-sized green billets 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 to remove large-volume green billets 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 billets will slip due to their own weight. If the clamping force is increased, the green billets will be damaged. Summary of the invention

[0006] The purpose of the present invention is to provide a feeding device for magnetic powder green compacts, which overcomes the disadvantages of the prior art that large-volume and heavy-weight magnetic powder green compacts cannot be transported and clamped.

[0007] To achieve the above object, the technical solution of the present invention is: A feeding device for magnetic powder green compacts comprises a rotary drive mechanism, a clamping drive mechanism, two clamping arms and a floating mechanism arranged between the rotary drive mechanism and the clamping drive mechanism; The two clamping arms are driven to open / close each other by a clamping drive mechanism, the clamping drive mechanism is connected to the floating mechanism, and 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 vertical parallel state to a horizontal up-and-down state, or the two clamping arms rotate from a horizontal up-and-down state to a vertical parallel state; The floating mechanism comprises a bottom plate, a floating plate, a cover plate and an elastic member, a cover plate is arranged on each side of the bottom plate, the floating plate is slidably connected with the bottom plate and slides between the two cover plates, and an elastic member is arranged between the two sides of the floating plate and the cover plates; The clamping drive mechanism is connected to the floating plate, and the rotating drive mechanism is connected to the bottom plate.

[0008] The bottom plate is provided with a slide groove, the floating plate is provided with a protruding slide bar, and the slide bar is arranged in the slide groove.

[0009] The bottom plate is provided with two parallel slide grooves, and the floating plate is correspondingly provided with two parallel slide bars; elastic members are provided between the two ends of the slide bars of the floating plate and the cover plate, and two elastic members are provided on each side.

[0010] The elastic member is a spring.

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

[0012] The clamping arm is provided with a detachable supporting plate.

[0013] A detachable support plate is arranged on the clamping arm rotated downward.

[0014] The support plate is provided with a slot, and the clamp arm is inserted into the slot of the support plate.

[0015] The advantages of the present invention are: 1. The rotating drive mechanism enables the feeding device to no longer clamp the green blank in a vertical state all the time, thus effectively preventing the green blank from sliding due to its own excessive weight; 2. The floating mechanism is provided with a slidable floating plate with springs on both sides, so that when the clamping arms clamp the green blank, the clamping action is not stiff, so that the two clamping arms can clamp the two sides of the green blank synchronously, and the green blank will not be moved and damaged due to one clamping arm contacting the green blank first; 3. The detachable support plate can lift the green blank after the feeding device rotates, and the large area of ​​the support plate can be used to support heavy and large-volume green blanks, which can effectively protect the integrity of the green blank and the stability during transportation; 4. Because the support plate is detachable, the support plate can be set to various sizes to adapt to green blanks of different specifications, so as to facilitate the production of green blanks of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] The present invention is further described below in conjunction with the accompanying drawings, which are only used for exemplary description and cannot be understood as limiting the present invention.

[0018] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0019] The present invention discloses a feeding device for magnetic powder green compacts, such as Figure 1-3 As shown, it includes a rotation drive mechanism 1, a clamping drive mechanism 2, two clamping arms 4 and a floating mechanism 3 arranged between the rotation drive mechanism 1 and the clamping drive mechanism 2; The two clamping arms 4 are driven by the clamping driving mechanism 2 to open / close relative to each other so as to clamp and transfer the magnetic powder green compact, and to release the clamped green compact.

[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 rotating 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 vertical parallel state to a horizontal up and down state. In this way, the state of vertically clamping the green billet is transformed into a state of lifting the green billet, eliminating the possibility of the green billet slipping from the clamping arm 4 due to its own weight, thereby ensuring the integrity and stability of the green billet during the transportation process; when the green billet is transported to the destination, the rotating 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 horizontal up and down state to a vertical parallel state, release the green billet and place it at a specified position, thereby completing the transportation 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 clamp arm 4 is provided with a detachable support plate 5, so that the present invention can be used not only for taking out and transporting large-volume and heavy green blanks, but also for taking out and transporting conventional green blanks. When used for taking out and transporting conventional green blanks, the support plate 5 can be removed. Of course, detachable support plates 5 of various sizes can also be prepared to adapt to green blanks of different sizes, so as to facilitate the replacement of support plates 5 of different sizes corresponding to green blanks of different sizes.

[0023] It is not necessary to install the support plate 5 on both clamping arms 4 , and it is sufficient to only provide a detachable support plate 5 on the clamping arm 4 located at the lower side after rotation.

[0024] In order to facilitate the disassembly of the support plate 5, a slot is provided on the support plate 5, and the slot is adapted to the width and thickness of the clamp arm 4. The clamp arm 4 can be directly inserted into the slot of the support plate 5, so that the replacement of the support plate 5 is more convenient.

[0025] like Figure 2 , Figure 3 As shown, a floating mechanism 3 is also arranged between the rotation drive mechanism 1 and the clamping drive mechanism 2. The floating mechanism 3 includes a bottom plate 31, a floating plate 32, a cover plate 33 and an elastic member 34. A cover plate 33 is arranged on each side of the bottom plate 31. The bottom plate 31 is provided with a slide groove. The floating plate 32 is provided with a protruding slide bar. The slide bar is arranged in the slide groove. The floating plate 32 is slidably connected with the bottom plate 31 and slides between the two cover plates 33. Preferably, the bottom plate 31 is provided with two parallel slide grooves, and the floating plate 32 is correspondingly provided with two parallel slide bars. Elastic members 34 are arranged between the two sides of the floating plate 32 and the cover plate 33. The elastic members 34 are arranged between the two ends of the slide bar of the floating plate 32 and the cover plate 33. Two elastic members 34 are arranged on each side. The elastic members 34 are usually springs. 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.

[0026] When clamping the green billet, the green billet ejected from the mold cannot be guaranteed to be exactly in the middle of the two clamping arms 4 every time, so that the two clamping arms 4 can clamp both sides of the green billet at the same time; if the green billet is biased to one side after being ejected, the clamping arm 4 on one side will touch the green billet first, and during the clamping process, the green billet will inevitably move laterally, which may damage the green billet. In order to solve this problem, the present invention sets a floating mechanism 3 between the rotating drive mechanism 1 and the clamping drive mechanism 2. The function of the floating mechanism 3 is that when the clamping arm 4 goes to clamp the green billet, if the clamping arm 4 on one side touches the green billet before the clamping arm 4 on the other side, the floating plate 32 slides on the bottom plate 31 under the elastic force of the spring, so that the clamping arm 4 on the other side is close to the green billet, so that the green billet is evenly stressed and clamped stably, and the green billet will not move, so that the green billet will not be displaced and damaged under the touch of the clamping arm 4 on one side.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

Claims

1. A feeding device for magnetic powder green compacts, characterized in that: It comprises a rotating drive mechanism (1), a clamping drive mechanism (2), two clamping arms (4), and a floating mechanism (3) arranged between the rotating drive mechanism (1) and the clamping drive mechanism (2); The two clamping arms (4) are driven to open / close with each other by a clamping drive mechanism (2); the clamping drive mechanism (2) is connected to the floating mechanism (3); the rotating 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 a vertical parallel state to a horizontal up-and-down state, or the two clamping arms (4) rotate from a horizontal up-and-down state to a vertical parallel state; The floating mechanism (3) comprises a bottom plate (31), a floating plate (32), a cover plate (33) and an elastic member (34); a cover plate (33) is provided on each side of the bottom plate (31); the floating plate (32) is slidably connected to the bottom plate (31) and slides between the two cover plates (33); and elastic members (34) are provided between the two sides of the floating plate (32) and the cover plates (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 compact according to claim 1, characterized in that: The bottom plate (31) is provided with a slide groove, and the floating plate (32) is provided with a protruding slide bar, and the slide bar is arranged in the slide groove.

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

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

5. The feeding device for magnetic powder green compact 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.

6. The feeding device for magnetic powder green compact according to claim 1, characterized in that: The clamping arm (4) is provided with a detachable supporting plate (5).

7. The feeding device for magnetic powder green compact according to claim 6, characterized in that: A detachable support plate (5) is provided on the clamping arm (4) rotated downward.

8. The feeding device for magnetic powder green compact according to claim 6, characterized in that: The support plate (5) is provided with a slot, and the clamping arm (4) is inserted into the slot of the support plate (5).

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