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CN-121972663-A - Powder cold press molding machine

CN121972663ACN 121972663 ACN121972663 ACN 121972663ACN-121972663-A

Abstract

The invention relates to the technical field of powder metallurgy, in particular to a powder cold press molding machine which comprises a mold assembly and a filler assembly, wherein the mold assembly comprises an upper mold, a mold body, a lower mold and a mold core, a through cylindrical mold cavity is formed in the mold body, the upper mold and the lower mold are of the same circular ring structure, the mold core is cylindrical, the lower mold is sleeved outside the mold core, the lower mold is sleeved in the mold cavity, the upper mold, the mold core, the lower mold and the mold cavity are coaxially arranged, the filler comprises the lower mold and the mold core which synchronously descend to a preset depth in the mold cavity, the top of the mold core is lifted to a flat surface after the filler assembly sweeps the pressurized filler, the lower mold is motionless, and repeated filling is realized.

Inventors

  • YUAN XIAOHUA

Assignees

  • 漳州市凯华机械有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (10)

  1. 1. The powder cold-pressing molding machine is used for cold-pressing powder into a pressed compact and is characterized by comprising a model component, a filler component and a control component; The model component comprises a first reciprocating piece, a second reciprocating piece, a third reciprocating piece, an upper die, a die body, a lower die and a die core; the die body is provided with a through cylindrical die cavity; the upper die, the die core, the lower die and the die cavity are coaxially arranged, and the die core, the lower die and the die cavity are mutually attached from outside to inside when being matched; The first reciprocating piece drives the upper die to move in the vertical direction and is positioned above the die cavity, the second reciprocating piece drives the lower die to move in the vertical direction and is positioned below the die cavity, and the third reciprocating piece drives the die core to move in the vertical direction and is positioned below the die cavity; the packing assembly is positioned at the side edge of the die cavity and packs the inside of the die cavity; the control component controls the operation of the model component and the filling component; The working process of the powder cold press molding machine comprises the following steps: Leveling, namely controlling the tops of the mold core, the lower mold and the mold cavity to be positioned on the same horizontal plane by the control assembly to form a leveling surface; The control assembly controls the packing assembly to move on the flat surface and then carries out packing for a plurality of times, wherein the packing comprises a lower die and a die core, wherein the lower die and the die core simultaneously control a second reciprocating piece and a third reciprocating piece to drive to synchronously descend to a preset depth in a die cavity; And cold pressing, namely controlling the first reciprocating piece to drive the upper die to move downwards to extrude powder between the lower die and the die core into a pressed compact by the control component, forming, then driving the upper die to move upwards, synchronously driving the lower die and the die core by the second reciprocating piece and the third reciprocating piece to eject the pressed compact, and then driving the die core to move downwards by the third reciprocating piece.
  2. 2. The powder cold press molding machine of claim 1, further comprising a platform, wherein the filler assembly comprises an extension table, a filler support, a hopper, a fourth shuttle, and a feed carriage, the mold core and the filler assembly being connected to the platform; The feeding vehicle is positioned on the extension table, and the fourth reciprocating piece drives the feeding vehicle to run on the extension table and the flat surface; The hopper is communicated with the feeding car.
  3. 3. The powder cold press molding machine according to claim 2, wherein the feeding vehicle comprises an annular shell, a stirring motor, a stirring rod and a connecting channel, the connecting channel is connected to the annular shell to realize the internal and external communication of the annular shell, and the hopper is communicated with one end of the connecting channel, which is positioned on the annular shell; The stirring motor stretches into the annular shell, and is in transmission connection with the stirring rod and drives the stirring rod to rotate in the annular shell to form sweeping pressurized packing.
  4. 4. The powder cold press molding machine of claim 3, wherein the filling further comprises a lower die and a die core in the die cavity, the second reciprocating member and the third reciprocating member are simultaneously controlled to synchronously descend to a preset depth, the fourth reciprocating member of the filling assembly drives the feeding vehicle to reciprocate on the die cavity to shake and sweep the pressurized filling, the third reciprocating member drives the die core top to rise to a flat surface, and the lower die is not moved.
  5. 5. A powder cold press forming machine as claimed in claim 3, wherein the surface swept by the stirring rod as the charge car reciprocates and sweeps the pressurized charge is a sweeping surface, and the die cavity is located in the sweeping surface.
  6. 6. The powder cold press molding machine of claim 2, further comprising a machine body, the platform being disposed on top of the machine body; the machine body is internally provided with a fixing frame, a fixing table, a connecting frame and a connecting table, wherein the connecting frame is connected to the fixing frame, the fixing table and the connecting table are connected to the connecting frame, and the connecting table is positioned above the fixing table; the second reciprocating piece comprises a second screw rod lifter, a limiting seat, a second jacking seat and four connecting rods, wherein four through holes for the connecting rods to pass through are formed in the connecting table; The second screw rod lifter sets up on the fixed station, the second screw rod lifter drives spacing seat and moves in the vertical direction, spacing seat and second jacking seat are connected through four connecting rods, second jacking seat is connected with the lower mould, second jacking seat, connecting rod, spacing seat, second screw rod lifter form from the top down's structure.
  7. 7. The powder cold press molding machine according to claim 6, wherein the third reciprocating member comprises a third motor, a transmission structure, a third screw rod and a third jacking seat, and a slotted hole for the third screw rod to pass through is arranged on the connecting table, and the slotted hole is positioned at the center of the four through holes; The four connecting rods form a limiting space; The second jacking seat is provided with a through groove for the mold core to pass through; the third motor is arranged on the lower surface of the connecting table and located at the side edge of the limiting space, the transmission structure is located on the lower surface of the connecting table and located in the limiting space, the third motor is in transmission connection with the third screw rod through the transmission structure, the top of the third screw rod is in rotary connection with the third jacking seat, the third jacking seat is connected with the mold core, and the mold core, the three jacking seats, the third screw rod and the transmission structure form a structure from top to bottom.
  8. 8. The powder cold press molding machine of claim 7, wherein the third shuttle further comprises two stop bars, the two stop bars being located between the platform and the connection platform, the stop bars being parallel to the third lead screw; the two limiting rods are respectively positioned at two sides of the limiting space; The third jacking seat is provided with two wings extending out of the limiting space, and third limiting grooves for the two limiting rods to pass through are respectively formed in the two wings.
  9. 9. The powder cold press molding machine of claim 7, wherein the limiting seat is provided with a second limiting groove corresponding to the third screw rod.
  10. 10. The powder cold press molding machine of claim 2, wherein the first reciprocating member is disposed on the platform by four first support frames.

Description

Powder cold press molding machine Technical Field The invention relates to the technical field of powder metallurgy, in particular to a powder cold press molding machine. Background The powder forming machine is special equipment specially designed and manufactured for pressing powder products, is widely applied to press forming of powder product industries such as powder metallurgy, hard alloy, magnetic materials, fine ceramics, electric carbon and the like to form pressed blanks, and is particularly suitable for press forming of multi-step complex products. Among the most powder metallurgical machine parts, iron-based powder metallurgical machine parts are most widely used among the products pressed by the powder press. In the traditional cold press molding process, the upper limit of the height-to-diameter ratio (height/wall thickness) of the annular pressed compact is generally not more than 3, and serious filler bridging, density delamination and molding cracking problems can occur after the upper limit of the height-to-diameter ratio (height/wall thickness) of the annular pressed compact is exceeded. For example, when a structural workpiece like a thin cylinder is required to be processed by powder metallurgy, the depth of filling is multiple times of the width when the powder forming machine is filled due to the fact that the thickness of the side wall of the workpiece is very thin, the filling is difficult due to friction force among the powder, the powder cannot fill an elongated space, a series of problems such as cavities, insufficient filling and the like are easy to occur in a pressed compact, and the final rejection rate is high. Therefore, there is a need for a powder cold press forming machine that can better accommodate workpieces having lengths that are multiple times the wall thickness. Disclosure of Invention The invention aims to solve the technical problem of providing a powder cold press molding machine which can be more suitable for a high-diameter-ratio blank pressing workpiece. In order to solve the technical problems, the invention adopts the following technical scheme: A powder cold press molding machine for cold pressing powder into a compact, the powder cold press molding machine including a mold assembly, a filler assembly, and a control assembly; The model component comprises a first reciprocating piece, a second reciprocating piece, a third reciprocating piece, an upper die, a die body, a lower die and a die core; the die body is provided with a through cylindrical die cavity; the upper die, the die core, the lower die and the die cavity are coaxially arranged, and the die core, the lower die and the die cavity are mutually attached from outside to inside when being matched; The first reciprocating piece drives the upper die to move in the vertical direction and is positioned above the die cavity, the second reciprocating piece drives the lower die to move in the vertical direction and is positioned below the die cavity, and the third reciprocating piece drives the die core to move in the vertical direction and is positioned below the die cavity; the packing assembly is positioned at the side edge of the die cavity and packs the inside of the die cavity; the control component controls the operation of the model component and the filling component; The working process of the powder cold press molding machine comprises the following steps: Leveling, namely controlling the tops of the mold core, the lower mold and the mold cavity to be positioned on the same horizontal plane by the control assembly to form a leveling surface; The control assembly controls the packing assembly to move on the flat surface and then carries out packing for a plurality of times, wherein the packing comprises a lower die and a die core, wherein the lower die and the die core simultaneously control a second reciprocating piece and a third reciprocating piece to drive to synchronously descend to a preset depth in a die cavity; And cold pressing, namely controlling the first reciprocating piece to drive the upper die to move downwards to extrude powder between the lower die and the die core into a pressed compact by the control component, forming, then driving the upper die to move upwards, synchronously driving the lower die and the die core by the second reciprocating piece and the third reciprocating piece to eject the pressed compact, and then driving the die core to move downwards by the third reciprocating piece. Preferably, the powder cold press molding machine further comprises a platform, wherein the filler assembly comprises an extension table, a filler bracket, a hopper, a fourth reciprocating piece and a feeding vehicle, and the mold core and the filler assembly are connected to the platform; The feeding vehicle is positioned on the extension table, and the fourth reciprocating piece drives the feeding vehicle to run on the extension table and the flat surface; The hopper is communicated wit