CN114101670B

CN114101670B - Metal powder hydraulic device capable of achieving double-sided stamping forming

Info

Publication number: CN114101670B
Application number: CN202111253295.XA
Authority: CN
Inventors: 杨挣钦
Original assignee: Nantong Mingtai Machine Tool Co ltd
Current assignee: Nantong Mingtai Machine Tool Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-11-18
Anticipated expiration: 2041-10-27
Also published as: CN114101670A

Abstract

The invention discloses a metal powder hydraulic device capable of being punched and formed in a double-sided mode, which comprises a rack, a feeding device, a forming device and a driving device, wherein the forming device is connected with the rack in a fastening mode, the feeding device is connected with the forming device, the driving device is connected with the forming device, the rack comprises an upright post, an upper cross beam is arranged at the upper end of the upright post, a lower cross beam is arranged at the lower end of the upright post, the forming device comprises an upper die assembly, a lower die assembly and a middle die assembly, the upper die assembly and the lower die assembly are arranged in the vertical direction of a space, the lower die assembly comprises a guide seat, one side of the guide seat and one end, far away from the upright post, of the lower cross beam are connected in a fastening mode, a working cavity is arranged on the guide seat, a guide groove is formed in the outer side of the working cavity, the middle die assembly is arranged in the guide groove, the middle die assembly comprises a middle die, the middle die comprises two die sections, and a middle die channel is formed in the cavity.

Description

Metal powder hydraulic device capable of achieving double-sided stamping forming

Technical Field

The invention relates to the technical field of hydraulic forming, in particular to a metal powder hydraulic device capable of being punched and formed on two sides.

Background

In recent years, with the development of mechanical forming technology, powder metallurgy technology has come into play to improve the production efficiency of enterprises, and the powder metallurgy technology takes metal powder as a basic material, is formed by pressing with a press machine, and is then sintered. Compared with the conventional manufacturing technology, the production time is shortened through the metal powder stamping technology, the production efficiency of enterprises is improved, however, with the continuous use of the powder metallurgy forming technology, some defects are gradually exposed in the production process.

The metal powder forming process is that the powder interval shortens gradually, carry out the process of densification, at metal powder densification in-process, because metal powder's size, the shape is irregular, and there is the clearance between the powder granule, when through press forming, can't guarantee evenly to the metal powder application of force, metal powder produces the displacement and takes place plastic deformation, carry out mechanical interlocking through deformation, improve connection performance, press into the pressed compact that has certain shape, intensity with metal powder, but the problem of pressed compact crackle among the powder metallurgy process is paid much attention to always.

Because friction exists between particles or between the particles and a model cavity, and the pressure generated by pressing of a press is far greater than the friction force, so that the friction force is uneven, metal powder mainly flows in a columnar form when being pressed, the movement of the metal powder particles is limited due to the roughness of the surface of the model cavity, the forming quality of a single-side pressing hydraulic press is not high, the maximum density of a double-side pressing blank is at the edge position of the blank, so that the metal powder is uneven in densification degree, the densification degree at the edge position is high, the strength is high, the densification degree at the middle position is low, the load impact resistance is weak, once the blank is impacted in the transportation process, cracks are easily generated, and the quality of a finished product is influenced.

Disclosure of Invention

The present invention is directed to a metal powder hydraulic apparatus capable of double-sided press forming, so as to solve the problems of the background art.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides a but two-sided stamping forming's metal powder hydraulic means, which comprises a frame, loading attachment, forming device and drive arrangement, forming device and frame fastening connection, loading attachment and forming device connect, drive arrangement and forming device connect, the frame includes the stand, the stand upper end is equipped with the entablature, the stand lower extreme is equipped with the bottom end rail, forming device includes last mould subassembly, lower mould subassembly and well mould subassembly, it arranges along the vertical direction in space to go up mould subassembly and lower mould subassembly, lower mould subassembly includes the guide holder, stand one end fastening connection is kept away from to guide holder one side and bottom end rail, be equipped with the working chamber on the guide holder, the working chamber outside is equipped with the guide way, working chamber and guide way intercommunication, well mould subassembly is arranged in the guide way, well mould subassembly includes well mould, well mould includes two mould lamella, be equipped with well mould way on the mould lamella, two well mould way composite model chambeies.

The frame is the main support basis, install forming device, improve connection performance through fastening connection, carry out the metal powder material loading through loading attachment, prevent the metal powder loss through pipe transmission, cause the injury to operating personnel health on every side, drive arrangement is main power supply, drive and extrusion, fix the stand through the bottom end rail, the stand upper end is fixed to the entablature, ninety degree contained angle, improve support performance, fix the lower mould subassembly through the bottom end rail, fix the cope match-plate pattern subassembly through the entablature, forming device divides into the cope match-plate pattern subassembly, lower mould subassembly and well mould subassembly, arrange along vertical direction, through the sectional type design, improve drawing of patterns efficiency, the guide holder is fixed on the bottom end rail, the stamping forming is carried out through the working chamber of establishing, slide the direction is carried out to the well mould subassembly through the guide way, well mould sectional type design, constitute by two mould lamellas, the split of being convenient for, carry out the finished product drawing of patterns, two well mould way constitute the model chamber, the lower mould moves in the chamber, the lower section moves in the upper segment of model chamber, carry out the two-sided punching press to metal powder, make upper and lower floor powder and well mould tail powder even, improve the punching press quality.

Further, the lower die assembly further comprises a lower die, the circumference size of the lower die is matched with the size of a die cavity, the driving device comprises a jacking hydraulic cylinder, a settlement hydraulic cylinder and an auxiliary hydraulic cylinder, the outer frame of the jacking hydraulic cylinder is fixedly connected with the side wall of the working cavity, the output end of the jacking hydraulic cylinder is in transmission connection with the lower die, the upper die assembly comprises an upper die and a fixed seat, one side of the fixed seat is fixedly connected with an upper cross beam, the axes of the upper die and the lower die are superposed, an upper die channel is arranged in the middle of the fixed seat, the upper die is slidably connected with the upper die channel, the outer frame of the auxiliary hydraulic cylinder is fixedly connected with the fixed seat, the output end of the auxiliary hydraulic cylinder is fixedly connected with the outer side of the fixed plate, the upper die comprises an inner die and an outer die, the upper end of the outer die is in transmission connection with the fixed plate, the inner die is slidably connected with the die cavity, the outer frame of the settlement hydraulic cylinder is fixedly connected with the bottom side of the fixed plate, and the output end of the inner die is in transmission connection.

The upper surface of the lower die is a bearing foundation of metal powder, the lower side of a die cavity is plugged, the lower die can slide in the vertical direction in the die cavity, displacement is output through a jacking hydraulic cylinder and is driven to the lower die, the upper die is divided into an inner die and an outer die, an auxiliary hydraulic cylinder is fixed through a fixing seat, the output displacement of the auxiliary hydraulic cylinder is limited through an upper die channel, sliding guiding is carried out through a fixing plate and drives the inner die and the outer die to move vertically, so that metal powder forming is carried out, a settling hydraulic cylinder is fixed through the fixing plate, the output displacement of the settling hydraulic cylinder drives the inner die to settle, punch forming is carried out on the middle area of the metal powder, the outer die carries out sliding guiding on the inner die through the die cavity, the middle of the metal powder is punched through the inner die, the outer ring of the metal powder is punched through the outer die, the friction force between the inner layer and the outer layer is improved through layering, the friction force between the surface of a die flap and the metal powder is larger than the dynamic friction force between the inner layer in the pressing process, the relative friction stroke between the inner layer and the inner layer is increased, friction is increased, the densification degree of the middle area is improved, the densification of the inner layer is convenient for removing gas between the metal powder, and the finished product quality is improved.

Further, the feeding device comprises a feeding pipe, a distribution seat, a spiral pipe, a mounting seat and a transmission pipe, a feeding slide way is arranged on one side of the guide seat, the feeding slide way is communicated with the working cavity, an opening is formed in one side of the feeding slide way, one end of the feeding pipe penetrates through the opening of the feeding slide way, a feeding cylinder is arranged in the feeding slide way, the output end of the feeding cylinder is connected with the feeding pipe in a transmission mode, one end of the feeding pipe is far away from the opening and is connected with the mounting seat in a fastening mode, a through hole is formed in the mounting seat, a sliding groove is formed in the inner wall face of the through hole, the sliding groove is spirally arranged, the spiral pipe is connected with the sliding groove in a sliding mode, the distribution seat is arranged on the upper side of the spiral pipe, the distribution cavity is communicated with the spiral pipe, a discharge hole is formed in one side of the feeding pipe, one end, far away from the discharge hole, of the transmission pipe is communicated with the distribution cavity through the through hole.

The metal powder is input through the feeding pipe, the metal powder is transmitted through the fan, the metal powder is blown into the feeding pipe to form high-speed airflow, the input efficiency is improved, the feeding cylinder is fixed through the feeding slideway, the feeding pipe is a rigid pipe, the feeding pipe is driven by the feeding cylinder to move along the feeding slideway, so that the mounting seat is driven to contract to prevent interference caused by descending of an upper die, the mounting seat is fixed through the feeding pipe, the spiral pipe is guided in a sliding manner through the sliding chute, the distribution seat is provided with a distribution cavity, the distribution cavity is communicated with the discharge port through a transmission pipe, the high-speed metal powder airflow transmitted in the feeding pipe is transmitted into the spiral pipe and is sprayed out through the spiral pipe, an outlet at the lower end of the spiral pipe is obliquely arranged, and the sprayed high-speed metal powder airflow generates reverse acting force on the spiral pipe, make the coil pipe along spout spiral rising, thereby it rotates to drive the coil pipe, the centrifugal force that the coil pipe rotated the production, make great metal powder and less metal powder carry out the layering, the instantaneous rotational speed of coil pipe is certain, the centrifugal force that the great metal powder of granule produced is big, make the great metal powder of granule thrown to be close to well die wall one side, be located the boundary layer, the less powder of granule is left in the intermediate level, the wall friction of metal powder and well die way is great, flow properties is relatively poor, when punching press through last mould and lower mould, local compressive stress is great, carry out the punching press to the metal powder of big granule through the great compressive stress of boundary layer, increase large granule metal powder's deformation degree, thereby improve mechanical meshing power, increase the intensity of shaping work piece, improve the shaping quality, prevent to take place loosely in the transit.

Furthermore, the feeding device further comprises a floating block and a reset spring, a pipe hole is formed in the floating block, one end of the transmission pipe is tightly connected with the pipe hole of the floating block, a blending groove is formed in the lower side of the discharge port, the floating block is arranged in the blending groove and is slidably connected with the blending groove, the reset spring is arranged at one end, close to the mounting seat, of the floating block, one end, far away from the floating block, of the reset spring is tightly connected with the wall surface of the blending groove, a clamping groove is formed in the outer side of the distribution seat, and part of the transmission pipe is wound in the clamping groove.

The floating block is guided to slide through the allocation groove, the upper end of the transmission pipe moves upwards along with the upward movement of the spiral pipe, the transmission pipe is driven to move through the floating block, the gradient of the transmission pipe is ensured, the friction area is reduced, the overlarge inclination angle is prevented, the kinetic energy loss of metal powder in the transmission pipe is reduced, the transmission speed of the metal powder is ensured, the initial state of the reset spring is in a compressed state, when the spiral pipe moves upwards spirally, the transmission pipe is gradually separated from the clamping groove, the number of winding turns of the transmission pipe on the clamping groove is reduced, the friction loss of the kinetic energy is reduced, the airflow flowing speed of the metal powder in the transmission pipe is improved, the linear distance between the floating block and the clamping groove of the transmission pipe is increased, the transmission smoothness is improved, the metal powder spraying speed of the outlet at the bottom end of the spiral pipe is improved, the reverse acting force obtained by the spiral pipe is enhanced, the spiral pipe is increased, the instantaneous centrifugal force obtained by large-particle metal powder is increased, the metal powder is accumulated in the model cavity, the distance between the spiral pipe and the metal powder surface layer is reduced, the large particle metal powder at a unit height is increased, and the centrifugal distance is increased, and the metal powder layers at different heights are kept consistent.

Furthermore, the middle die assembly further comprises a gear ring, the two middle die hydraulic cylinders are connected through the gear ring, a middle die hydraulic cylinder is arranged on the outer side of the die section, one side, far away from the die section, of the middle die hydraulic cylinder is connected with the guide groove in a sliding mode, and the output end of the middle die hydraulic cylinder is connected with the die section in a transmission mode.

The two middle die hydraulic cylinders are limited through the gear ring, guided through the guide grooves and driven to move, and the die sections are driven to move by the middle die hydraulic cylinders, so that the two die sections are combined and separated, and the demolding efficiency is improved.

Furthermore, a mounting groove is formed in one side of the guide groove, the driving device further comprises a rotating motor, the rotating motor is arranged in the mounting groove, a gear is arranged at the output end of the rotating motor, the gear is meshed with the tooth surface of the gear ring, and the rotating motor is in transmission connection with the gear ring through the gear.

Fix rotating electrical machines through the mounting groove, rotating electrical machines output torque to electronic ring gear rotates, through the transmission, drives well mould pneumatic cylinder at the guide way internal rotation, thereby drives the shaping work piece through the mould lamella and rotates, makes both ends and last mould, lower mould break away from earlier about the work piece, then through the shrink of mould pneumatic cylinder in the drive, thereby makes mould lamella and work piece side break away from, improves drawing of patterns efficiency.

As optimization, the clamping groove is spirally arranged, and the rotation direction of the clamping groove is opposite to that of the spiral pipe. The clamping groove is spirally arranged, so that the part of the transmission pipe wound in the clamping groove is tightly attached to the distribution seat, the transmission sensitivity of the transmission pipe is improved, when the spiral pipe upwards rotates, the transmission pipe is loosened from the clamping groove, and the inclination of the transmission pipe is rapidly adjusted by the reset spring.

As optimization, the surface roughness of the spiral pipe is gradually reduced from top to bottom. Chute length is less than spiral pipe length, when the spiral pipe rose the upper end, along with the roughness reduces, makes the instantaneous rotational speed of spiral pipe increase to increase spiral pipe bottom spun large granule metal powder centrifugal force, make the metal powder layering of different level height more even.

Compared with the prior art, the invention has the following beneficial effects: the method firstly punches the middle of the metal powder through the inner die, punches the outer ring of the metal powder through the outer die, increases the relative friction stroke between contact surfaces through layered punching, and improves the densification degree of a middle area; the inner layer is firstly punched, so that gas among metal powder can be conveniently exhausted, the middle layer is prevented from cracking, and the quality of a finished product is improved; the metal powder forms high-speed airflow and is blown into the feeding pipe, and is sprayed out through the spiral pipe, the generated reverse acting force enables the spiral pipe to spirally rise along the sliding chute, so that the spiral pipe is driven to rotate, the centrifugal force generated by rotation enables the larger metal powder and the smaller metal powder to be layered, the larger metal powder is thrown to one side close to the wall surface of the middle die channel and is positioned on the edge layer, the smaller powder is left on the middle layer, the larger pressure stress of the edge layer is used for punching the larger metal powder, the deformation degree of the larger metal powder is increased, the mechanical meshing force is improved, the strength of a formed workpiece is increased, the forming quality is improved, and the phenomenon that the large metal powder is loosened in the transportation process is prevented; when the spiral pipe spiral shifts up, the transmission pipe breaks away from in the draw-in groove gradually, reduces the transmission pipe and twines the number of turns on the draw-in groove, makes the transmission pipe increase from slider to draw-in groove linear distance within a definite time, improves the metal powder blowout speed of spiral pipe bottom export to make the spiral pipe spiral rise rotational speed increase, the instantaneous centrifugal force that the increase large granule metal powder obtained improves the centrifugal distance of large granule metal powder unit height through the increase centrifugal force, improves the metal powder layering homogeneity of not co-altitude.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a schematic view of a middle die assembly of the present invention;

FIG. 3 is a schematic view of a workpiece rotational stripping configuration of the present invention;

FIG. 4 is a schematic view of a dual power transmission configuration of the upper die assembly of the present invention;

FIG. 5 is a schematic view of a layered press structure of the present invention;

FIG. 6 is an enlarged view of portion A of the view of FIG. 5;

FIG. 7 is an enlarged view of portion B of the view of FIG. 3;

FIG. 8 is an enlarged view of portion C of the view of FIG. 7;

in the figure: 1-frame, 11-upright post, 12-upper beam, 13-lower beam, 2-feeding device, 21-feeding pipe, 211-discharging port, 212-blending groove, 22-distributing seat, 221-clamping groove, 222-distributing cavity, 23-spiral pipe, 24-mounting seat, 241-sliding groove, 25-transmission pipe, 26-feeding cylinder, 27-floating block, 28-reset spring, 3-forming device, 31-upper die component, 311-upper die, 3111-inner die, 3112-outer die, 312-fixing seat, 3121-upper die channel, 32-lower die component, 321-lower die, 322-guide seat, 3221-guide groove, 3222-working cavity, 33-middle die component, 331-middle die, 3312-middle die channel, 332-gear ring, 333-middle die hydraulic cylinder, 4-driving device, 41-jacking hydraulic cylinder, 42-settling hydraulic cylinder, 43-auxiliary hydraulic cylinder, 44-fixing plate, 45-rotating motor and 46-gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The invention provides the technical scheme that:

as shown in fig. 1 to 5, a metal powder hydraulic device capable of double-sided punch forming comprises a frame 1, a feeding device 2, a forming device 3 and a driving device 4, the forming device 3 is fastened to the frame 1, the feeding device 2 is connected to the forming device 3, the driving device 4 is connected to the forming device 3, the frame 1 includes a column 11, an upper cross beam 12 is disposed at an upper end of the column 11, a lower cross beam 13 is disposed at a lower end of the column 11, the forming device 3 includes an upper die assembly 31, a lower die assembly 32 and a middle die assembly 33, the upper die assembly 31 and the lower die assembly 32 are arranged along a spatial vertical direction, the lower die assembly 32 includes a guide seat 322, one side of the guide seat 322 and one end of the lower cross beam 13, which is far away from the column 11, are fastened to be connected, a working cavity 3222 is disposed on the guide seat 322, a guide groove 3221 is disposed outside the working cavity 3222, the working cavity 3222 is communicated with the guide groove 3221, the middle die assembly 33 is disposed in the guide groove 3221, the middle die assembly 33 includes a middle die 331, the middle die 331 includes a middle die 3312, the middle die 3312, and two die 3312 are combined with a die cavity.

The frame 1 is a main supporting foundation, the forming device 3 is installed, the connection performance is improved through fastening connection, metal powder is loaded through the loading device 2, the metal powder is prevented from escaping through pipeline transmission and harms the bodies of surrounding operators, the driving device 4 is a main power source and is used for driving and extrusion forming, the stand column is fixed through the lower cross beam 13, the upper cross beam 12 is fixed at the upper end of the stand column 11 to form an included angle of ninety degrees, the supporting performance is improved, the lower die assembly 32 is fixed through the lower cross beam 13, the upper die assembly 31 is fixed through the upper cross beam 12, the forming device 3 is divided into the upper die assembly 31, the lower die assembly 32 and the middle die assembly 33, arrange along vertical direction, through the sectional type design, improve drawing of patterns efficiency, guide holder 322 is fixed on bottom end rail 13, work chamber 3222 through establishing in carries out stamping forming, slide guide through guide way 3221 to well mould subassembly 33, well mould 331 sectional type design, constitute by two mould lamella 3311, the split of being convenient for, carry out the finished product drawing of patterns, two well mould ways 3312 constitute the model chamber, the lower mould removes at the model chamber hypomere, it removes to go up the mould at the model chamber upper segment, carry out two-sided punching press to metal powder, make upper and lower layer powder and well mould wall friction even, improve punching press quality.

As shown in fig. 1 to 6, the lower mold assembly 32 further includes a lower mold 321, the circumferential dimension of the lower mold 321 is adapted to the dimension of the mold cavity, the driving device 4 includes a jacking hydraulic cylinder 41, a settling hydraulic cylinder 42 and an auxiliary hydraulic cylinder 43, an outer frame of the jacking hydraulic cylinder 41 is fastened to the side wall of the working cavity 3222, an output end of the jacking hydraulic cylinder 41 is in transmission connection with the lower mold 321, the upper mold assembly 31 includes an upper mold 311 and a fixed seat 312, one side of the fixed seat 312 is fastened to the upper cross beam 12, the axes of the upper mold 311 and the lower mold 321 coincide, an upper mold flue 3121 is disposed in the middle of the fixed seat 312, the upper mold 311 is in sliding connection with the upper mold flue 3121, the outer frame of the auxiliary hydraulic cylinder 43 is fastened to the fixed seat 312, an output end of the auxiliary hydraulic cylinder 43 is disposed with a fixed plate 44, an outer side of the fixed plate 44 is in sliding connection with the upper mold flue 3121, the upper mold 3111 includes an inner mold 3112 and an outer mold 3112, an upper end of the outer mold 3112 is in transmission connection with the fixed plate 44, a mold 2 is disposed on the outer mold 3112, a mold cavity is disposed on the outer mold 3111, the outer mold is in sliding connection with the settling hydraulic cylinder 42 and a fixed plate 44, and a lower side of the fixed plate, and a fixed plate 42, and an output end of the hydraulic cylinder 3111 is in transmission connection, and a settling hydraulic cylinder 3111.

The upper surface of the lower mold 321 is a bearing foundation of metal powder, the lower side of the mold cavity is sealed, the lower mold 321 can slide in the mold cavity along the vertical direction, the jacking hydraulic cylinder 41 outputs displacement to drive the lower mold 321, the upper mold 311 is divided into an inner mold 3111 and an outer mold 3112, the auxiliary hydraulic cylinder 43 is fixed through the fixing seat 312, the output displacement of the auxiliary hydraulic cylinder 43 is limited through the upper mold 3121, the fixing plate 44 is used for sliding guidance and drives the inner mold 3111 and the outer mold 3112 to move along the vertical direction, so that metal powder molding is carried out, the settling hydraulic cylinder 42 is fixed through the fixing plate 44, the settling hydraulic cylinder 42 outputs displacement to drive the inner mold 3111 to settle, the method comprises the steps of punch forming the middle area of metal powder, sliding guiding is carried out on an inner die 3111 by an outer die 3112 through a die cavity, punching is carried out on the middle of the metal powder through the inner die 3111, the outer die 3112 punches the outer ring of the metal powder, the friction force between an inner layer and an outer layer is improved through layering punching, in the pressing process, the friction force between the surface of a die plate 3311 and the flowing of the metal powder is larger than the dynamic friction force between the metal powder, through inner layering and outer layering, the relative friction stroke between contact surfaces is increased, the friction is increased, the densification degree of the middle area is improved, inner-layer advanced punching is carried out, gas between the metal powder is conveniently removed, cracks are prevented from occurring in the middle layer, and the quality of a finished product is improved.

As shown in fig. 1, 3, 7, and 8, the feeding device 2 includes a feeding pipe 21, a distribution seat 22, a spiral pipe 23, a mounting seat 24, and a transmission pipe 25, a feeding chute is disposed on one side of a guide seat 322, the feeding chute is communicated with a working cavity 3222, an opening is disposed on one side of the feeding chute, one end of the feeding pipe 21 passes through the opening of the feeding chute, a feeding cylinder 26 is disposed in the feeding chute, an output end of the feeding cylinder 26 is connected with the feeding pipe 21 in a transmission manner, one end of the feeding pipe 21 away from the opening is fixedly connected with the mounting seat 24, a through hole is disposed on the mounting seat 24, a chute 241 is disposed along an inner wall surface of the through hole, the spiral pipe 241 is spirally disposed, the spiral pipe 23 is slidably connected with the chute 241, the distribution seat 22 is disposed on an upper side of the spiral pipe 23, the distribution cavity 222 is disposed on the distribution seat 22, the distribution cavity 222 is communicated with the spiral pipe 23, a discharge hole 211 is disposed on one side of the feeding pipe 21, one end of the transmission pipe 25 is communicated with the discharge hole 211, a through hole is disposed on one side of the distribution cavity 222, and one end of the transmission pipe 25 is communicated with the distribution cavity 222 through hole and is communicated with the distribution cavity 222.

The metal powder is input through the feeding pipe 21 and is transmitted through the fan, so that the metal powder forms high-speed airflow to be blown into the feeding pipe 21, the input efficiency is improved, the feeding cylinder 26 is fixed through a feeding slideway, the feeding pipe 21 is a rigid pipe, the feeding cylinder 26 drives the feeding pipe 21 to move along the feeding slideway, thereby driving the mounting seat 24 to contract, preventing interference on the descending of the upper die 311, fixing the mounting seat 24 through the feeding pipe 21, the spiral pipe 23 is guided by the sliding groove 241, the distribution base 22 is provided with a distribution chamber 222, the distribution chamber 222 is communicated with the discharge hole 211 through the transmission pipe 25, the high-speed metal powder airflow transmitted in the feeding pipe 21 is transmitted to the spiral pipe 23, and is sprayed out through the spiral pipe 23, the outlet at the lower end of the spiral pipe 23 is obliquely arranged, the sprayed high-speed metal powder airflow generates reverse acting force on the spiral pipe 23, so that the spiral pipe 23 spirally rises along the chute 241, thereby driving the spiral tube to rotate, the centrifugal force generated by the rotation of the spiral tube 23 causes the larger metal powder and the smaller metal powder to be layered, the instantaneous rotating speed of the spiral tube 23 is constant, the centrifugal force generated by the larger metal powder particles is large, the larger metal powder particles are thrown to one side close to the wall surface of the middle die way 3312 and are positioned at the edge layer, the smaller powder particles are left at the middle layer, the friction of the metal powder and the wall surface of the middle die way 3312 is large, the flowing property is poor, when the upper die 311 and the lower die 321 are used for stamping, the local compressive stress is large, the large-particle metal powder is stamped by the large compressive stress of the edge layer, the deformation degree of the large-particle metal powder is increased, thereby improving the mechanical engaging force, increasing the strength of the formed workpiece, improving the forming quality and preventing the loosening in the transportation process.

As shown in fig. 7, the feeding device further includes a slider 27 and a return spring 28, a pipe hole is formed in the slider 27, one end of the transmission pipe 25 is fixedly connected with the pipe hole of the slider 27, a blending groove 212 is formed in the lower side of the discharge port 211, the slider 27 is arranged in the blending groove 212, the slider 27 is slidably connected with the blending groove 212, the return spring 28 is arranged at one end of the slider 27 close to the mounting seat 24, one end of the return spring 28 far away from the slider 27 is fixedly connected with the wall surface of the blending groove 212, a clamping groove 221 is formed in the outer side of the distribution seat 22, and part of the transmission pipe 25 is wound in the clamping groove 221.

Slide guiding is carried out on the floating block 27 through the allocation groove 212, the upper end of the transmission pipe 25 moves upwards along with the spiral pipe 23, the transmission pipe 25 is driven to move through the floating block 27, the gradient of the transmission pipe 25 is ensured, the friction area is reduced, the overlarge inclination angle is prevented, the kinetic energy loss of metal powder in the transmission pipe 25 is reduced, the transmission speed of the metal powder is ensured, the initial state of the reset spring 28 is in a compression state, when the spiral pipe 23 moves upwards spirally, the transmission pipe 25 is separated from the clamping groove 221 gradually, the number of turns of the transmission pipe 25 wound on the clamping groove 221 is reduced, the friction loss of the kinetic energy is reduced, the airflow flowing speed of the metal powder in the transmission pipe 25 is improved, the straight line distance of the transmission pipe 25 from the floating block 27 to the clamping groove 221 is increased, the transmission smoothness is improved, the ejection speed of the metal powder at the outlet at the bottom end of the spiral pipe 23 is improved, the reverse acting force obtained by the spiral pipe 23 is enhanced, the spiral rising rotating speed of the spiral pipe 23 is increased, the instantaneous centrifugal force obtained by the metal powder is increased, the large particles are accumulated along with the metal powder in the model cavity, the metal powder surface layer, the distance between the spiral pipe 23 and the large particles at different heights is reduced, the centrifugal distance of the large particles is kept consistent centrifugal force.

As shown in fig. 1 and 3, the middle mold assembly 33 further includes a gear ring 332, the two middle mold hydraulic cylinders 333 are connected through the gear ring 332, a middle mold hydraulic cylinder 333 is disposed outside the mold section 3311, one side of the middle mold hydraulic cylinder 333 away from the mold section 3311 is slidably connected to the guide groove 3221, and an output end of the middle mold hydraulic cylinder 333 is drivingly connected to the mold section 3311.

The two middle die hydraulic cylinders 333 are limited through the gear ring 332, the middle die hydraulic cylinders 333 are guided through the guide grooves 3221, and the middle die hydraulic cylinders 333 output displacement to drive the die segments 3311 to move, so that the two die segments 3311 are combined and separated, and the demolding efficiency is improved.

As shown in fig. 3, a mounting groove is formed on one side of the guiding groove 3221, the driving device 4 further includes a rotating motor 45, the rotating motor 45 is disposed in the mounting groove, a gear 46 is disposed at an output end of the rotating motor 45, the gear 46 is engaged with a tooth surface of the gear ring 332, and the rotating motor 45 is in transmission connection with the gear ring 332 through the gear 46.

Fix rotating electrical machines 45 through the mounting groove, rotating electrical machines 45 output torque to electronic ring gear 332 rotates, through the transmission, drives well mould pneumatic cylinder 333 and rotates in guide way 3221, thereby drives the shaping work piece through mould lamella 3311 and rotates, makes both ends and last mould 311, lower mould 321 break away from earlier about the work piece, then through the shrink of drive well mould pneumatic cylinder 333, thereby makes mould lamella 3311 and work piece side break away from, improves drawing of patterns efficiency.

Preferably, the clamping groove 221 is spirally arranged, and the rotation direction of the clamping groove 221 is opposite to that of the spiral pipe 23. Clamping groove 221 is spirally arranged, so that the part of transmission pipe 25 wound in clamping groove 221 is tightly attached to distribution seat 22, transmission sensitivity of transmission pipe 25 is improved, transmission pipe 25 is loosened from clamping groove when spiral pipe 23 rotates upwards, and reset spring 28 rapidly adjusts inclination of transmission pipe.

As an optimization, the surface roughness of the spiral tube 23 is gradually reduced from top to bottom. The length of the sliding groove 241 is smaller than that of the spiral pipe 23, when the spiral pipe 23 rises to the upper end, along with the reduction of roughness, the instantaneous rotating speed of the spiral pipe 23 is increased, so that the centrifugal force of large-particle metal powder sprayed out from the bottom end of the spiral pipe 23 is increased, and the metal powder layers with different layer heights are more uniform.

The working principle of the invention is as follows: the method comprises the steps of firstly stamping the middle of metal powder through an inner die 3111, stamping a metal powder outer ring through an outer die 3112, wherein in the pressing process, the flowing friction force between the surface of a die plate 3311 and the metal powder is greater than the dynamic friction force between the metal powder, increasing the relative friction stroke between contact surfaces through inner and outer layering, increasing the friction, improving the densification degree of a middle area, firstly carrying out inner-layer stamping, and removing gas between the metal powder; the metal powder is conveyed by the fan, so that the metal powder forms a high-speed airflow and is blown into the feeding pipe 21, the high-speed airflow is sprayed out by the spiral pipe 23, a reverse acting force is generated to enable the spiral pipe 23 to spirally rise along the chute 241, the spiral pipe is driven to rotate, centrifugal force generated by rotation of the spiral pipe 23 enables layering of larger metal powder and smaller metal powder, the instantaneous rotating speed of the spiral pipe 23 is constant, the centrifugal force generated by the larger metal powder is large, the larger metal powder is thrown to one side close to the wall surface of the middle die 3312 and is positioned at the edge layer, the smaller metal powder is left at the middle layer, the wall surface friction of the metal powder and the middle die 3312 is large, the flowing performance is poor, when the metal powder is punched by the upper die 311 and the lower die 321, local compressive stress is large, the large metal powder is punched by the larger compressive stress at the edge layer, the deformation degree of the large metal powder is increased, and mechanical engagement is improved; when spiral pipe 23 spirally moves upwards, conveying pipe 25 gradually breaks away from clamping groove 221, reduce conveying pipe 25 number of turns of winding on clamping groove 221, make conveying pipe 25 increase from slider 27 to clamping groove 221 within a definite time linear distance, reduce the friction loss of kinetic energy, thereby improve the metal powder blowout speed of spiral pipe 23 bottom outlet, the reverse acting force reinforcing that makes spiral pipe 23 obtain, thereby make spiral pipe 23 spiral rising rotational speed increase, the instantaneous centrifugal force that the large granule metal powder obtained increases, along with the accumulation of metal powder in the model cavity, the interval on spiral pipe 23 and metal powder top layer reduces, improve the centrifugal distance of large granule metal powder unit height through increasing centrifugal force, improve the metal powder layering homogeneity of not co-altitude.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a but metal powder hydraulic means of two-sided stamping forming which characterized in that: the metal powder hydraulic device comprises a rack (1), a feeding device (2), a forming device (3) and a driving device (4), the forming device (3) is fixedly connected with the rack (1), the feeding device (2) is connected with the forming device (3), the driving device (4) is connected with the forming device (3), the rack (1) comprises a stand column (11), an upper cross beam (12) is arranged at the upper end of the stand column (11), a lower cross beam (13) is arranged at the lower end of the stand column (11), the forming device (3) comprises an upper die assembly (31), a lower die assembly (32) and a middle die assembly (33), the upper die assembly (31) and the lower die assembly (32) are arranged along the vertical direction of the space, the lower die assembly (32) comprises a lower die (321) and a guide seat (322), one end of the stand column (11) is fixedly connected with one side of the lower cross beam (13), a working cavity (3222) is arranged on the guide seat (322), the circumference size of the lower die (321) and the size of the settling cavity (41) are adapted with a jacking hydraulic cylinder (41) and a settling hydraulic cylinder (41) and a hydraulic cylinder (41) connected with an auxiliary hydraulic cylinder (41), the output end of the jacking hydraulic cylinder (41) is in transmission connection with the lower die (321), the upper die assembly (31) comprises an upper die (311) and a fixed seat (312), one side of the fixed seat (312) is fixedly connected with the upper cross beam (12), and the axes of the upper die (311) and the lower die (321) are superposed;

the outer side of the working cavity (3222) is provided with a guide groove (3221), the working cavity (3222) is communicated with the guide groove (3221), the middle mold assembly (33) is arranged in the guide groove (3221), the middle mold assembly (33) comprises a middle mold (331), the middle mold (331) comprises two mold halves (3311), the mold halves (3311) are provided with middle mold passages (3312), the two middle mold passages (3312) form a mold cavity, the middle of the fixing seat (312) is provided with an upper mold passage (3121), the upper mold (311) is slidably connected with the upper mold passage (3121), the outer frame of the auxiliary hydraulic cylinder (43) is fixedly connected with the fixing seat (312), the output end of the auxiliary hydraulic cylinder (43) is provided with a fixing plate (44), the outer side of the fixing plate (44) is slidably connected with the upper mold passage (3121), the upper end of the outer mold (311) is connected with the fixing plate (3111), the transmission of the fixing plate (3112) is connected with the transmission of the inner mold (3112), the inner mold (3112) is provided with the fixing plate, the fastening hydraulic cylinder (3111) is slidably connected with the sedimentation hydraulic cylinder (3111), and the output end of the hydraulic cylinder (42) is connected with the bottom side of the fixing plate (3111);

feeding device (2) includes inlet pipe (21), distribution seat (22), spiral pipe (23), mount pad (24) and transmission pipe (25), guide holder (322) one side is equipped with the material loading slide, material loading slide and working chamber (3222) intercommunication, material loading slide one side are equipped with the opening, inlet pipe (21) one end passes the opening of material loading slide, be equipped with material loading cylinder (26) in the material loading slide, material loading cylinder (26) output and inlet pipe (21) transmission are connected, opening one end and mount pad (24) fastening connection are kept away from in inlet pipe (21), be equipped with the perforating hole on mount pad (24), follow the perforating hole is equipped with spout (241), spout (241) spiral setting, spiral pipe (23) and spout (241) sliding connection, spiral pipe (23) upside are equipped with distribution seat (22), be equipped with distribution chamber (222) on distribution seat (22), distribution chamber (222) and spiral pipe (23) intercommunication, inlet pipe (21) one side is equipped with discharge gate (211), transmission pipe (25) one end and transmission pipe (222) intercommunication are equipped with discharge gate (222) through discharge gate (211) through-hole (222).

2. The double-sided impact moldable metal powder hydraulic apparatus of claim 1, wherein: the feeding device (2) further comprises a floating block (27) and a return spring (28), a pipe hole is formed in the floating block (27), one end of the transmission pipe (25) is fixedly connected with the pipe hole of the floating block (27), a blending groove (212) is formed in the lower side of the discharge hole (211), the floating block (27) is arranged in the blending groove (212), the floating block (27) is slidably connected with the blending groove (212), the return spring (28) is arranged at one end, close to the mounting seat (24), of the floating block (27), one end, far away from the floating block (27), of the return spring (28) is fixedly connected with the wall surface of the blending groove (212), a clamping groove (221) is formed in the outer side of the distribution seat (22), and part of the transmission pipe (25) is wound in the clamping groove (221).

3. The double-sided impact moldable metal powder hydraulic apparatus of claim 1, wherein: well mould subassembly (33) still includes ring gear (332), mould lamella (3311) outside is equipped with well mould pneumatic cylinder (333), well mould pneumatic cylinder (333) are kept away from mould lamella (3311) one side and guide way (3221) sliding connection, and well mould pneumatic cylinder (333) output and mould lamella (3311) transmission are connected, two well mould pneumatic cylinder (333) are through ring gear (332) connection.

4. The metal powder hydraulic device capable of double-sided press molding according to claim 1, characterized in that: guide way (3221) one side is equipped with the mounting groove, drive arrangement (4) still include rotating electrical machines (45), in the mounting groove was arranged in rotating electrical machines (45), rotating electrical machines (45) output was equipped with gear (46), gear (46) and ring gear (332) flank of tooth meshing, rotating electrical machines (45) are through gear (46) and ring gear (332) transmission connection.

5. The metal powder hydraulic device capable of double-sided press molding according to claim 2, characterized in that: the clamping groove (221) is spirally arranged, and the rotating direction of the clamping groove (221) is opposite to that of the spiral pipe (23).

6. The double-sided impact moldable metal powder hydraulic device of claim 5, characterized in that: the surface roughness of the spiral pipe (23) is gradually reduced from top to bottom.