A metallurgical powder compacting device for iron-silicon-aluminum soft magnetic material

Abstract

The application relates to the field of powder metallurgy forming technology, and discloses a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic material, which comprises a cabinet, a control panel is arranged on the outer wall of the cabinet, and an extrusion unit, a feeding unit, a reciprocating mechanism, a power unit, a knocking unit and a ejection unit are arranged in the cabinet; the feeding unit comprises a stock bin which is arranged above the cabinet, a powder pump for conveying powder is arranged in the stock bin, the control panel is electrically connected with the powder pump, a supporting plate is fixedly connected in the cabinet, a powder box is attached to the top end of the supporting plate, the bottom end of the powder box is in a penetrating mode, a bellows is arranged in communication between the powder box and the powder pump, and the problems that, in the daily use of the existing metallurgical powder pressing device, powder filling is mostly realized in a manual or simple vibrating feeding mode, uneven filling, powder caking and the like easily occur, and the local density difference of a forming cavity is large are solved.

Description

A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials Technical Field

[0001] This invention relates to the field of powder metallurgy forming technology, specifically to a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. Background Technology

[0002] Iron-silicon-aluminum soft magnetic materials are widely used in electronics, power, and other fields due to their excellent magnetic properties. These materials are typically prepared using powder metallurgy, which involves loading alloy powder into a mold, pressing it into shape, and then sintering it. During the pressing process, the uniformity of powder filling, the elimination of agglomerates, and the automatic demolding of the formed blank are key factors affecting the product's density uniformity, dimensional accuracy, and production efficiency. However, existing equipment still has some problems in its use, as follows:

[0003] In daily use, existing metallurgical powder pressing equipment often uses manual or simple vibration feeding for powder filling, which can easily lead to problems such as uneven filling and powder agglomeration, resulting in large local density differences in the cavity. Demolding often relies on ejector pins, which can easily damage the blank. Moreover, the processes of feeding, pressing, and demolding are often separate, resulting in low production efficiency. Summary of the Invention

[0004] This invention provides a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials, which has the advantages of quantitative conveying, filling, leveling, pre-elimination of agglomeration, pressing and molding, and demolding of powder, thereby improving production efficiency and solving the problems mentioned in the background art.

[0005] This invention provides the following technical solution: a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials, comprising a cabinet, a control panel mounted on the outer wall of the cabinet, and further comprising an extrusion unit, a feeding unit, a reciprocating mechanism, a power unit, a striking unit, and a top-loading unit disposed within the cabinet; the feeding unit includes a hopper located at the top of the cabinet, a powder pump for conveying powder is installed in the hopper, the control panel is electrically connected to the powder pump, a support plate is fixedly connected within the cabinet, a powder box is attached to the top of the support plate, the bottom of the powder box is through-hole, and the powder box is connected to the powder pump. The support plate has a corrugated pipe, and a lower mold is passed through and fixedly connected to the top of the support plate. The top of the lower mold and the top of the support plate are on the same horizontal plane. Both ends of the lower mold are open, and a base plate is slidably connected inside the lower mold. The reciprocating mechanism includes a connecting frame fixedly connected to the outer wall of the powder box. A first sliding pin is rotatably connected to the bottom end of the connecting frame. It also includes a rotating shaft rotatably connected to the inner wall of the cabinet. One end of the rotating shaft is connected to the power unit. A column is fixedly connected to the outer wall of the rotating shaft. A first cam groove is opened on the outer wall of the column corresponding to the first sliding pin. The first sliding pin is located in the first cam groove and cooperates with it. The top-loading unit includes a T-shaped plate fixedly connected to the bottom end of the base plate. Two rotating rods are rotatably connected to the outer wall of the T-shaped plate. Guide wheels are fixedly connected to the outer walls of each rotating rod. The guide wheels pass through a limit plate. Limit grooves are formed at the ends of the limit plate corresponding to the guide wheels. The guide wheels are located within and cooperate with the limit grooves. A connecting plate is fixedly connected to the bottom end of the limit plate. A slider is fixedly connected to the bottom end of the connecting plate. The slider is slidably connected to the bottom end of the cabinet. A second sliding pin is rotatably connected to the end of the connecting plate. A turntable is fixedly connected to the outer wall of the rotating shaft. A second cam groove is formed on the outer wall of the turntable corresponding to the second sliding pin. The second sliding pin is located in and cooperates with the second cam groove; the striking unit includes gears set on both sides of the outer wall of the lower mold, the gears are fixedly connected to a guide rod, the guide rod is rotatably connected to the bottom end of the support plate, and the bottom ends of the gears are fixedly connected to two swing rods on both sides. The outer wall of the swing rod near the lower mold has a slot, and a slide rod is slidably connected in the slot. One end of the slide rod is fixedly connected to the slot with a spring, and the other end of the slide rod is fixedly connected to a ball. It also includes racks set on both sides of the gears, the ends of the racks are fixedly connected to a connecting rod, and the connecting rod is fixedly connected to the outer wall of the connecting frame.

[0006] In a preferred embodiment, the first cam groove is M-shaped, the limiting groove is lightning-shaped, which includes two horizontal groove segments that are parallel to each other, and an inclined groove segment that connects the two horizontal groove segments, and the second cam groove is fan-shaped.

[0007] In a preferred embodiment, the extrusion unit includes a hydraulic cylinder mounted on the top of the cabinet via a flange, a pressure plate fixedly connected to the bottom of the hydraulic cylinder via a flange, an upper mold fixedly mounted on the bottom of the pressure plate corresponding to the lower mold, the hydraulic cylinder being electrically connected to the control panel, and a plurality of limiting rods fixedly connected between the top of the support plate and the cabinet, the pressure plate passing through the limiting rods and being slidably connected thereto.

[0008] In a preferred embodiment, the top of the cabinet has a feeding door corresponding to the hopper, the lower side of the outer wall of the cabinet has an inspection door, and the bottom of the cabinet has a bottom groove corresponding to the slider, with the bottom end of the slider located in the bottom groove and slidably connected thereto.

[0009] In a preferred embodiment, a set of sliding grooves are provided at the bottom end of the support plate, and a sliding plate is slidably connected in each of the sliding grooves, with a rack fixedly connected to the bottom end of the sliding plate.

[0010] In a preferred embodiment, each of the swing rods is fixedly connected to an arc-shaped plate at its top end, and the bottom end of the support plate is provided with an arc-shaped groove corresponding to the arc-shaped plate. The top end of the arc-shaped plate is located in the arc-shaped groove and is slidably connected to it.

[0011] In a preferred embodiment, the sphere is made of a flexible material.

[0012] In a preferred embodiment, the power unit includes a motor fixedly installed at the bottom of the cabinet, a gearbox is fitted between the output shaft and the rotating shaft of the motor, and the motor is electrically connected to the control panel.

[0013] In a preferred embodiment, the base plate is cylindrical, and a sealing ring is fitted on the outer wall of the base plate.

[0014] In a preferred embodiment, a through groove is provided at the connection between the support plate and the connecting frame, a slope is provided at the end of the support plate, and a discharge port is provided on the outer wall of the cabinet corresponding to the slope.

[0015] The present invention has the following beneficial effects:

[0016] 1. The striking unit utilizes the reciprocating motion of the powder box to drive the rack, gear, and its swing arm and ball to alternately strike the outer wall of the mold from both sides. The vibration generated by the striking is transmitted to the inside of the mold, which can effectively loosen any possible powder clumps and remove the powder adhering to the inner wall of the mold, ensuring that the powder is densely filled in the cavity without gaps. The flexible ball and spring buffer design not only ensure the striking effect but also avoid mechanical damage to the mold.

[0017] 2. The ejector unit, through the cooperation of the lightning-shaped limiting groove and the fan-shaped second cam groove, achieves precise intermittent movement of the base plate descending to leave space during pressing, rising to eject the blank during demolding, maintaining a high position during discharge, and resetting before feeding. After the formed blank is ejected, it is pushed to the ramp by the returning powder box and automatically slides out through the discharge port, ensuring smooth demolding and avoiding possible damage to the blank or low efficiency caused by manual handling.

[0018] 3. The powder box, controlled by the M-shaped first cam groove, achieves a composite motion trajectory of "forward feeding - slight backward movement - forward smoothing again - returning to the initial position". This trajectory not only accurately feeds the powder into the lower mold cavity, but also smooths out any powder that may accumulate at the cavity opening through the backward and forward movement, ensuring that the amount of powder filled into the cavity each time is basically consistent and the upper surface is flat, laying the foundation for subsequent uniform pressing. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a rear-view sectional view of the present invention;

[0021] Figure 3 is a front-view sectional view of the present invention;

[0022] Figure 4 is a schematic diagram of the support plate of the present invention;

[0023] Figure 5 is a schematic diagram of the reciprocating mechanism of the present invention;

[0024] Figure 6 is a schematic diagram of the structure of the first cam groove of the present invention;

[0025] Figure 7 is a schematic diagram of the striking unit of the present invention;

[0026] Figure 8 is an exploded view of the slide bar and slot of the present invention;

[0027] Figure 9 is a partial cross-sectional view of the cabinet of the present invention;

[0028] Figure 10 is a schematic diagram of the top material unit of the present invention;

[0029] Figure 11 is an exploded view of the second sliding pin and the second cam groove of the present invention.

[0030] In the diagram: 1. Cabinet; 11. Discharge port; 12. Support plate; 121. Ramp; 122. Through groove; 123. Slide groove; 124. Arc groove; 13. Inspection door; 14. Control panel; 15. Feed door; 16. Bottom groove;

[0031] 2. Hydraulic cylinder; 21. Pressure plate; 22. Limiting rod; 23. Upper mold;

[0032] 3. Material hopper; 31. Powder pump; 32. Corrugated pipe; 33. Powder box;

[0033] 4. Motor; 41. Gearbox;

[0034] 5. Rotating shaft; 51. Column; 52. Connecting bracket; 53. First sliding pin; 54. First cam groove; 55. Connecting rod;

[0035] 6. Remove the mold;

[0036] 7. Turntable; 71. Second cam groove; 72. Slider; 73. Connecting plate; 74. T-shaped plate; 75. Limiting plate; 76. Limiting groove; 77. Guide wheel; 78. Rotating rod; 79. Second sliding pin;

[0037] 8. Rack and pinion; 81. Slide board; 82. Bar; 83. Gear; 84. Curved board; 85. Swing rod; 86. Sliding rod; 87. Sphere; 88. Spring; 89. Slot;

[0038] 9. Base plate; 91. Sealing ring. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please refer to Figures 1-3 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The device includes a cabinet 1, which forms the main frame and outer shell of the equipment, housing and protecting all internal mechanisms. A control panel 14 is installed on the outer wall of the cabinet 1. A feeding door 15 is located at the top of the cabinet 1 corresponding to the material hopper 3, facilitating the addition of iron-silicon-aluminum soft magnetic alloy powder into the hopper 3. An inspection door 13 is located on the lower side of the outer wall of the cabinet 1, allowing maintenance personnel to easily inspect and maintain the internal mechanisms. An internal fixed connection includes a horizontally positioned support plate 12, which serves as the mounting base for multiple functional components. One end of the support plate 12 has a downward-sloping ramp 121, and the outer wall of the cabinet 1 has a discharge port 11 corresponding to the end of the ramp 121, through which the formed blank is finally discharged. The support plate 12 also has a through groove 122 to provide space for the movement of the connecting frame 52. The bottom end of the support plate 12 has a set of parallel sliding grooves 123, and the inner bottom end of the cabinet 1 also has a bottom groove 16.

[0041] It should be noted that the control panel 14 integrates a PLC controller, human-machine interface, buttons, indicator lights, etc., for setting process parameters, controlling equipment start and stop, and displaying equipment status. Its internal PLC or microcontroller controller has a pre-written complete automatic control program. The program logic coordinates and controls the following actions: starting motor 4 at a set speed to drive the rotating shaft 5 to rotate continuously; at a specific phase of the rotating shaft 5's rotation (corresponding to when the powder box 33 moves close to or above the lower mold 6), controlling the powder pump 31 to start, beginning to feed powder into the powder box 33; when the powder box 33 leaves the area of ​​the lower mold 6, stopping the feeding; and as the rotating shaft 5 rotates... In another specific phase (corresponding to the base plate 9 being in a low position, and the powder box 33 having left the lower mold 6 and returned a certain distance), the control cylinder 2 drives the piston rod to extend, the upper mold 23 presses down, applies a set pressure to the powder in the lower mold 6 and holds the pressure for a certain time. When the holding time is up, the control cylinder 2 reverses direction, the piston rod retracts, the upper mold 23 rises, and the rotation of the motor 4 is continuous. Therefore, the reciprocating motion of the powder box 33, the lifting and lowering of the base plate 9, and the striking of the striking unit are all performed continuously, automatically, and periodically. They are coupled with the intermittent pressing action of the cylinder 2 through precise timing design to form a complete automatic working cycle.

[0042] Please refer to Figures 2-3 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The feeding unit is used to store and transport powder. It includes a hopper 3 located above the cabinet 1. The hopper 3 is used to store the iron-silicon-aluminum soft magnetic alloy powder to be pressed. A powder pump 31 is installed in the hopper 3. The powder pump 31 is preferably a screw feeder or a pneumatic conveying pump, which can pump the powder out of the hopper 3 quantitatively and continuously. The start and stop of the powder pump 31 and the feeding speed are controlled by the control panel 14. A powder box 33 is placed at the top of the support plate 12. The bottom of the powder box 33 is completely open, forming an open bottom. The powder box 33 is connected to the powder pump 31 through a corrugated pipe 32.

[0043] It should be noted that the corrugated pipe 32 has the characteristics of being flexible and extensible. This characteristic allows the connecting pipe between the powder box 33 and the fixed powder pump 31 to expand and deform when the powder box 33 moves horizontally back and forth on the support plate 12, without falling off or hindering the movement, thereby ensuring the continuous and stable conveying of powder during dynamic feeding.

[0044] Please refer to Figures 1-4 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The extrusion unit is the core component for performing powder pressing and molding. It includes a hydraulic cylinder 2 that is vertically installed at the top of the cabinet 1 via a flange. The piston rod of the hydraulic cylinder 2 extends downward, and its bottom end is fixedly connected to a pressure plate 21 via a flange. The bottom end of the pressure plate 21 is fixedly installed with an upper mold 23 corresponding to the position of the lower mold 6. The shape of the upper mold 23 matches the inner cavity of the lower mold 6 and is used to press the powder. The hydraulic cylinder 2 is electrically connected to the control panel 14, and its extension and retraction, pressure and speed are controlled by the control panel 14.

[0045] It should be noted that in order to ensure the stability of the pressure plate 21 and the upper mold 23 during vertical movement and to avoid eccentric loading, four vertical limiting rods 22 are fixedly connected between the top of the support plate 12 and the top or side wall of the cabinet 1. The pressure plate 21 has corresponding through holes, which are sleeved on the limiting rods 22 and can slide up and down along them, forming a reliable guiding mechanism.

[0046] Please refer to Figures 2-3 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The lower mold 6 is fixedly and continuously installed on the support plate 12. Its top processing surface is flush with the top plane of the support plate 12. Both the upper and lower ends of the lower mold 6 are through, forming a cylindrical cavity. A bottom plate 9 is slidably fitted in the cavity. The shape of the bottom plate 9 matches the cross-section of the inner cavity of the lower mold 6. In this embodiment, it is cylindrical. A sealing ring 91 is fitted on the outer wall of the bottom plate 9. The bottom plate 9 can slide up and down in the cavity. Its function is to act as the bottom wall of the cavity or eject the formed blank at different stages.

[0047] It should be noted that the function of the sealing ring 91 is to fill the tiny gap between the base plate 9 and the inner wall of the lower mold 6, preventing the fine iron-silicon-aluminum powder from leaking out of the gap during filling and pressing. This ensures that all the powder is confined within the closed space formed by the upper mold 23, the inner wall of the lower mold 6, and the top of the base plate 9, thus guaranteeing the integrity of the formed blank and the utilization rate of the powder.

[0048] Please refer to Figure 2 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The power unit provides power to all motion mechanisms except for the oil cylinder 2. It includes a motor 4 fixedly installed at the bottom of the cabinet 1. The motor 4 is preferably a servo motor or a frequency converter motor to precisely control the speed. The output shaft of the motor 4 is connected to one end of the rotating shaft 5 through a reduction gearbox 41.

[0049] It should be noted that the gearbox 41 is used to reduce the speed and increase the torque to meet the required speed and driving force of the mechanism. The start, stop, forward and reverse rotation and speed of the motor 4 are controlled by the control panel 14.

[0050] Please refer to Figures 2-6 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The reciprocating mechanism drives the powder box 33 to perform horizontal reciprocating motion on the support plate 12 along a specific trajectory to complete the functions of feeding, smoothing, ejecting the blank, and returning. The core of the reciprocating mechanism is a cam mechanism. Specifically, a connecting frame 52 is fixedly connected to the outer wall of the powder box 33. The connecting frame 52 extends downward, and its bottom end is rotatably connected to a first sliding pin 53 via a bearing. Inside the cabinet 1, a rotating shaft 5 is rotatably supported by a bearing seat. The rotating shaft 5 is driven to rotate by a power unit. A column 51 is fixedly connected to the outer wall of the rotating shaft 5. A closed first cam groove 54 is machined on the cylindrical surface of the column 51. The end of the first sliding pin 53 extends into this first cam groove 54.

[0051] It should be noted that the first cam groove 54 is "M" shaped (as shown in Figure 6). When the rotating shaft 5 drives the column 51 to rotate at a constant speed, the first sliding pin 53, under the constraint of the first cam groove 54, will generate a specific horizontal reciprocating motion, which in turn drives the powder box 33 to move along the slide groove 123 on the support plate 12 through the connecting frame 52. The M-shaped cam groove trajectory design makes the movement cycle of the powder box 33 as follows: from the initial position to the direction of the discharge port 11 to above the lower mold 6, this is the first forward stroke; then it moves a short distance in the opposite direction, this is the backward stroke; then it moves again to the direction of the discharge port 11, this is the second forward stroke. The first forward stroke is the smoothing process; the last forward stroke is the reverse movement back to the initial position, which is the return stroke. In the first forward stroke, the powder pump 31 works, and the powder falls into the powder box 33 through the bellows 32 and fills the cavity area of ​​the lower mold 6 through its bottom opening. The smoothing action of moving backward and then forward can scrape away the excess powder accumulated at the cavity opening, ensuring that the powder filling amount in the cavity is accurate and the upper surface is flat. After pressing is completed, when the powder box 33 moves from the initial position to the discharge port 11, its side can push the molded blank that is pushed out of the upper surface of the lower mold 6 forward, so that it slides out of the discharge port 11 along the slope 121, completing the automatic discharge.

[0052] Please refer to Figures 5-11 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The ejector unit is used to control the precise lifting and lowering of the base plate 9 within the cavity of the lower mold 6. Its movement needs to be strictly coordinated with the movement of the powder box 33 and the pressing action of the hydraulic cylinder 2. The ejector unit is also driven by a cam mechanism and shares the same rotating shaft 5 with the reciprocating mechanism. The actuating component of the ejector unit includes a T-shaped plate 74 fixedly connected to the bottom end of the base plate 9. A rotating rod 78 is rotatably connected to each side of the horizontal part of the T-shaped plate 74 through bearings. The outer end of each rotating rod 78 is fixed. Two guide wheels 77 are installed, each passing through a vertically set limiting plate 75. A special limiting groove 76 is opened at the end of the limiting plate 75, as shown in Figure 10. The limiting groove 76 is "lightning bolt" shaped. Specifically, each limiting groove 76 has two parallel horizontal groove segments, which are connected by an inclined transition groove segment. The guide wheels 77 roll within these limiting grooves 76. A connecting plate 73 is fixedly connected to the bottom end of the limiting plate 75, and a slider 72 is fixedly connected to the bottom end of the connecting plate 73. The bottom of slider 72 is located in the bottom groove 16 opened at the bottom of the cabinet 1, and can slide along the length of the bottom groove 16. A second sliding pin 79 is rotatably connected to the end of the connecting plate 73 via a bearing. A turntable 7 is also fixedly installed on the rotating shaft 5. A closed second cam groove 71 is machined on the surface of the turntable 7, as shown in Figure 11. The second cam groove 71 is fan-shaped, and the end of the second sliding pin 79 extends into this second cam groove 71. When the rotating shaft 5 rotates, it drives the second sliding pin 79 through the second cam groove 71, thereby driving the connecting plate 73 and slider 72 to perform reciprocating intermittent motion along the bottom groove 16. The motion of slider 72 is transmitted through the connecting plate 73 and the limiting plate 75. Since the guide wheel 77 is restricted in the "lightning bolt" shaped limiting groove 76, when the limiting plate 75 moves horizontally, the guide wheel 77 moves along the track of the limiting groove 76. The movement of the guide wheel 77 is forced to follow the pattern of "horizontal stop (in the parallel groove section) - inclined rise / fall (in the transition groove section) - horizontal stop (in another parallel groove section)". This movement of the guide wheel 77 is ultimately transformed into the intermittent lifting and lowering movement of the base plate 9 through the rotating rod 78 and the T-shaped plate 74: "low position stop (feeding / pressing position) - rise (ejection position) - high position stop (discharge position) - fall (reset)". The contour of the fan-shaped second cam groove 71 determines the timing and stroke of the horizontal movement of the slider 72, thus coordinating with the phase of the M-shaped first cam groove 54 to ensure that the lifting and lowering of the base plate 9 and the movement of the powder box 33 are synchronized in time. For example, when the powder box 33 moves above the lower mold 6 to prepare for feeding, the base plate 9 must be in the "high position stop" state after rising (at this time, the top of the base plate 9 is flush with the support plate 12, forming the bottom wall of the cavity) to receive the powder.

[0053] It should be noted that when the powder box 33 is smoothed and removed, and the hydraulic cylinder 2 drives the upper mold 23 to press down, the bottom plate 9 needs to first descend to the "low position stop" state to leave space for powder compression. After pressing is completed, the upper mold 23 rises, and the bottom plate 9 needs to immediately rise to the "high position stop" state to push the formed blank out of the upper surface of the lower mold 6. Then, the powder box 33 moves to the discharge port 11 to push out the blank. At this time, the bottom plate 9 remains in the high position. After the blank is pushed away, the bottom plate 9 descends to reset, ready for the next cycle of feeding.

[0054] Please refer to Figures 6-8 for a metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials. The striking unit is used to strike the outer wall of the lower mold 6 during and after powder filling to compact the powder, eliminate agglomerates, and reduce powder adhesion to the wall. The power of the striking unit comes from the reciprocating motion of the powder box 33. In the groove 123 opened at the bottom of the support plate 12, a sliding plate 81 is slidably connected. A rack 8 is fixedly connected to the bottom end of each sliding plate 81. The extension direction of the rack 8 is parallel to the groove 123. The two racks 8 are located on both sides of the lower mold 6. The end of each rack 8 is connected to the connecting frame 5 of the powder box 33 through a connecting rod 55. The outer wall of mold 2 is fixedly connected. Therefore, when the powder box 33 moves left and right under the drive of the reciprocating mechanism, it will synchronously drive the two racks 8 to reciprocate under the guidance of the slide plate 81 through the connecting rod 55. On both sides of the outer wall of the lower mold 6, there is a gear 83. The gear 83 is fixedly installed on a smooth rod 82. The smooth rod 82 is rotatably connected to the bottom end of the support plate 12 through a bearing seat. When the gear 83 meshes with the rack 8 on the same side, the left and right movement of the rack 8 is directly converted into the forward and reverse rotation of the gear 83. Two swing rods 85 are symmetrically fixedly connected on both sides of the axle below each gear 83. The ends of the swing rods 85 are designed with a buffer knocking mechanism.

[0055] It should be noted that the striking mechanism is specifically designed as follows: a slot 89 is provided at one end of the swing arm 85, and a slide rod 86 is slidably inserted into the slot 89. A spring 88 is press-fitted between the end of the slide rod 86 located in the slot 89 and the bottom of the slot 89. The other end of the slide rod 86 extends out of the swing arm 85 and is fixedly connected to a ball 87. The ball 87 is made of a flexible material, such as rubber or polyurethane, to avoid rigid impact damage to the mold surface. In addition, an arc plate 84 is fixedly connected to the top of the swing arm 85. The bottom end of the support plate 12 is provided with an arc groove 124 corresponding to the sliding trajectory of each arc plate 84. The top of the arc plate 84 is embedded in the arc groove 124 and can slide along it. This design provides stable guidance and support for the swing of the swing arm 85 and prevents it from shaking.

[0056] The working principle of the striking unit is as follows: When the powder box 33 drives the rack 8 to move in one direction, the drive gear 83 rotates, causing the two rocker arms 85 on it to swing. At this time, one of the rocker arms 85 on the gear 83 will swing towards the outer wall of the lower mold 6. The ball 87 at its end will first contact the outer wall of the lower mold 6. Due to the presence of the spring 88, the ball 87 will not immediately produce a rigid collision after contacting the mold, but will compress the spring 88. The slide bar 86 will retract part of its length into the slot 89 to accumulate energy. As the gear 83 continues to rotate, the swing angle of the rocker arm 85 forces the spring to further compress the spring 88. When the powder box 33 moves to the end of its stroke and begins to move in the opposite direction, the rack 8 drives the gear 83 to rotate in the opposite direction. At this time, the previously compressed spring 88 begins to release energy. Pushing the slide bar 86 and the ball 87 causes the ball 87 to "bounce" against the outer wall of the lower mold 6 with a certain force, producing a clear vibration. At the same time, the swing arm 85 on the other side of the gear 83 begins to swing towards the mold, and its ball 87 contacts the mold and compresses the spring 88, accumulating energy for the next knocking when moving in the opposite direction. This cycle continues. Each reciprocating movement of the powder box 33 drives the knocking mechanism on both sides to knock the lower mold 6 multiple times alternately through the racks 8 and gears 83 on both sides. The knocking helps to break up soft lumps in the powder (small agglomerates that may form due to moisture and static electricity during storage and transportation of iron, silicon and aluminum powder). At the same time, the vibration helps the powder to sink in the cavity due to its own weight, filling it more densely, reducing voids, and also helps to remove the powder adhering to the inner wall of the lower mold 6, keeping the cavity clean.

[0057] The workflow of this invention is as follows:

[0058] Initial state: Powder box 33 is located on one side of support plate 12, bottom plate 9 is in a high position, its top is flush with the plane of support plate 12, upper mold 23 is in the upper position, and rotating shaft 5 is in a stationary state.

[0059] Feeding and smoothing stage: Control panel 14 starts motor 4 and powder pump 31, rotating shaft 5, driving powder box 33 to move towards outlet 11 via M-shaped first cam groove 54. Powder pump 31 feeds iron-silicon-aluminum powder from hopper 3 into powder box 33 through bellows 32. When powder box 33 moves directly above lower mold 6, powder falls into cavity of lower mold 6 through bottom opening, completing filling. At the same time, the movement of powder box 33 drives racks 8 on both sides to move synchronously via connecting rod 55. When meshing gear 83 rotates... At this time, the tapping unit starts working, alternately tapping the outer wall of the lower mold 6 to compact the powder and eliminate lumps. After the powder box 33 moves a short distance, the first cam groove 54 causes it to move back a short distance in the opposite direction. This process scrapes off any excess powder at the cavity opening (smoothing action). Then, the powder box 33 moves briefly towards the discharge port 11 again to ensure the smoothing effect. Next, the powder box 33 begins to return to its initial position. During the return process, the tapping unit continues to work, and the powder pump 31 stops supplying material after the powder box 33 leaves the area of ​​the lower mold 6.

[0060] Pressing stage: When the powder box 33 completely leaves the area of ​​the lower mold 6 and continues to move towards the initial position, through the linkage of the top material unit, the bottom plate 9, under the control of the "lightning" type limiting groove 76 and the fan-shaped second cam groove 71, begins to descend from the high position to the low position, leaving space for powder compression. At this time, the cavity of the lower mold 6 is filled with powder that has been smoothed and compacted. The control panel 14 controls the action of the hydraulic cylinder 2, driving the upper mold 23 to move downward, passing through the guide of the limiting rod 22, and precisely inserting into the cavity of the lower mold 6, applying high pressure to the powder in the cavity, pressing it into a blank of a predetermined shape and density. After holding the pressure for a period of time, the hydraulic cylinder 2 drives the upper mold 23 to rise and separate from the lower mold 6.

[0061] Ejection and discharge stage: After the upper mold 23 is completely withdrawn, the ejector unit controls the bottom plate 9 to rise rapidly from the low position to the high position, steadily ejecting the formed blank from the upper surface of the lower mold 6. At this time, the powder box 33 has returned to the initial position and paused briefly. Then, driven by the first cam groove 54, the powder box 33 begins a new round of movement towards the discharge port 11. The main purpose of this movement is to discharge the blank. During the movement, the powder box 33 contacts the formed blank that has been ejected from the upper surface of the lower mold 6 and pushes the blank together towards the discharge port 11. The blank is pushed away from the area of ​​the lower mold 6 and reaches the slope 121 of the support plate 12. Under the action of gravity, it slides down the slope 121 and finally exits the cabinet 1 through the discharge port 11 to complete the discharge.

[0062] Reset and preparation for the next cycle: After the powder box 33 pushes out the blank, it continues its movement cycle and eventually returns to the initial position. During the return process of the powder box 33, the top material unit controls the bottom plate 9 to descend from the high position to the low position to prepare for the next feeding. At this time, all mechanisms are reset to a state similar to the initial state, a complete work cycle ends, the rotating shaft 5 continues to rotate, and the feeding and smoothing stage of the next cycle begins immediately. This process is repeated to achieve continuous automated production.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials, comprising a cabinet (1), wherein a control panel (14) is installed on the outer wall of the cabinet (1), characterized in that, It also includes an extrusion unit, a feeding unit, a reciprocating mechanism, a power unit, a striking unit, and a top-loading unit installed in the cabinet (1); the feeding unit includes a hopper (3) located above the cabinet (1), a support plate (12) is fixedly connected inside the cabinet (1), a powder box (33) is attached to the top of the support plate (12), a lower mold (6) is passed through the top of the support plate (12) and fixedly connected thereto, and a base plate (9) is slidably connected inside the lower mold (6); the reciprocating mechanism includes a connecting frame (52) fixedly connected to the outer wall of the powder box (33), the connecting frame (52)... 2) The bottom end is rotatably connected to a first sliding pin (53), and also includes a rotating shaft (5) rotatably connected to the inner wall of the cabinet (1). One end of the rotating shaft (5) is connected to the power unit. A column (51) is fixedly connected to the outer wall of the rotating shaft (5). A first cam groove (54) is opened on the outer wall of the column (51) corresponding to the first sliding pin (53). The first sliding pin (53) is located in the first cam groove (54) and cooperates with it. The top material unit includes a T-shaped plate (74) fixedly connected to the bottom end of the base plate (9). The outer wall of the T-shaped plate (74) is provided with two guide wheels (77). The guide wheels (77) pass through A limiting plate (75) is inserted through the guide wheel (77) at the end of the limiting plate (75). A limiting groove (76) is opened at the end of the limiting plate (75) corresponding to the guide wheel (77). The guide wheel (77) is located in the limiting groove (76) and cooperates with it. A connecting plate (73) is fixedly connected to the bottom end of the limiting plate (75). A slider (72) is fixedly connected to the bottom end of the cabinet (1). A second sliding pin (79) is rotatably connected to the end of the connecting plate (73). A turntable (7) is fixedly connected to the outer wall of the rotating shaft (5). The outer wall of the turntable (7) is opened corresponding to the second sliding pin (79). A second cam groove (71) is provided, and a second sliding pin (79) is located in and cooperates with the second cam groove (71); the striking unit includes gears (83) provided on both sides of the outer wall of the lower mold (6), a light rod (82) is fixedly connected to the gears (83), and a rocker arm (85) is fixedly connected to both sides of the bottom end of the gears (83). A ball (87) is provided on the rocker arm (85), and a rack (8) is provided on both sides of the gears (83). A connecting rod (55) is fixedly connected to the end of the rack (8), and the connecting rod (55) is fixedly connected to the outer wall of the connecting frame (52).

2. The metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The first cam groove (54) is M-shaped, the limiting groove (76) is lightning-shaped, which includes two horizontal groove sections that are parallel to each other, and an inclined groove section that connects the two horizontal groove sections. The second cam groove (71) is fan-shaped. The outer wall of the T-shaped plate (74) is rotatably connected to two rotating rods (78), and the outer wall of each rotating rod (78) is fixedly connected to a guide wheel (77).

3. The metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The extrusion unit includes a hydraulic cylinder (2) installed at the top of the cabinet (1) via a flange. A pressure plate (21) is fixedly connected to the bottom of the hydraulic cylinder (2) via a flange. An upper mold (23) is fixedly installed at the bottom of the pressure plate (21) corresponding to the lower mold (6). The hydraulic cylinder (2) is electrically connected to the control panel (14). Several limiting rods (22) are fixedly connected between the top of the support plate (12) and the cabinet (1). The pressure plate (21) passes through the limiting rods (22) and is slidably connected to them.

4. The metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The top of the cabinet (1) is provided with a feeding door (15) corresponding to the hopper (3), the lower side of the outer wall of the cabinet (1) is provided with an inspection door (13), and the bottom end of the cabinet (1) is provided with a bottom groove (16) corresponding to the slider (72). The bottom end of the slider (72) is located in the bottom groove (16) and is slidably connected to it.

5. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The support plate (12) has a set of sliding grooves (123) at the bottom end, and a sliding plate (81) is slidably connected in each of the sliding grooves (123). The bottom end of the sliding plate (81) is fixedly connected to a rack (8).

6. The metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The top of each swing rod (85) is fixedly connected to an arc plate (84), and the bottom of each support plate (12) is provided with an arc groove (124) corresponding to the arc plate (84). The top of the arc plate (84) is located in the arc groove (124) and is slidably connected to it.

7. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The light rod (82) is rotatably connected to the bottom end of the support plate (12). The swing rod (85) has a slot (89) on the outer wall of the side near the lower mold (6). A slide rod (86) is slidably connected in the slot (89). A spring (88) is fixedly connected between one end of the slide rod (86) and the slot (89). The other end of the slide rod (86) is fixedly connected to a ball (87), which is made of flexible material.

8. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The power unit includes a motor (4) fixedly installed at the bottom of the cabinet (1). A gearbox (41) is fitted between the output shaft of the motor (4) and the rotating shaft (5). The motor (4) is electrically connected to the control panel (14).

9. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: The hopper (3) is equipped with a powder pump (31) for conveying powder. The control panel (14) is electrically connected to the powder pump (31). The bottom of the powder box (33) is through-hole. A corrugated pipe (32) connects the powder box (33) and the powder pump (31). The top of the lower mold (6) and the top of the support plate (12) are on the same horizontal plane. The upper and lower ends of the lower mold (6) are through-hole. The bottom plate (9) is cylindrical. A sealing ring (91) is fitted on the outer wall of the bottom plate (9).

10. A metallurgical powder pressing device for iron-silicon-aluminum soft magnetic materials according to claim 1, characterized in that: A through groove (122) is provided at the connection between the support plate (12) and the connecting frame (52), and a ramp (121) is provided at the end of the support plate (12). A discharge port (11) is provided on the outer wall of the cabinet (1) corresponding to the ramp (121).

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