CN114101670A - Metal powder hydraulic device capable of achieving double-sided stamping forming - Google Patents
Metal powder hydraulic device capable of achieving double-sided stamping forming Download PDFInfo
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- CN114101670A CN114101670A CN202111253295.XA CN202111253295A CN114101670A CN 114101670 A CN114101670 A CN 114101670A CN 202111253295 A CN202111253295 A CN 202111253295A CN 114101670 A CN114101670 A CN 114101670A
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- feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
- B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
Abstract
The invention discloses a metal powder hydraulic device capable of double-sided punch forming, which comprises a frame and a feeding device, 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 with the bottom end rail to guide holder one side, 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 synthetic model cavities.
Description
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 densifying, at the metal powder densifying 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 to the metal powder application of force even, 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 close attention to all the time.
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 machine frame is a main supporting foundation, the forming device is installed, the connection performance is improved through fastening connection, metal powder is fed through the feeding device, the metal powder is prevented from escaping through pipeline transmission and harms the body of surrounding operators, the driving device is a main power source and drives and performs extrusion forming, the upright post is fixed through the lower cross beam, the upper cross beam is fixed at the upper end of the upright post to form an included angle of ninety degrees, the supporting performance is improved, the lower cross beam is used for fixing the lower die assembly, the upper die assembly is fixed through the upper cross beam, the forming device is divided into an upper die assembly, a lower die assembly and a middle die assembly, the upper die assembly, the lower die assembly and the middle die assembly are arranged along the vertical direction, the demolding efficiency is improved through sectional type design, the guide seat is fixed on the lower cross beam, the guide seat is used for performing stamping forming through a working cavity arranged in the forming device, and the middle die assembly is subjected to sliding guide through the guide groove, the middle mold is designed in a sectional mode and comprises two mold sections, so that the middle mold is convenient to split, finished product demolding is carried out, a mold cavity is formed by two middle mold channels, the lower mold moves at the lower section of the mold cavity, the upper mold moves at the upper section of the mold cavity, double-sided stamping is carried out on metal powder, the upper-layer powder and the lower-layer powder are uniformly rubbed with the middle mold wall, and the stamping quality is improved.
Furthermore, the lower die component also comprises a lower die, the circumferential dimension of the lower die is matched with the dimension of the model cavity, the driving device comprises a jacking hydraulic cylinder, subside pneumatic cylinder and supplementary pneumatic cylinder, jacking pneumatic cylinder frame and working chamber lateral wall fastening connection, jacking pneumatic cylinder output and lower mould transmission are connected, it includes mould and fixing base to go up the mould subassembly, fixing base one side and entablature fastening connection, go up mould and lower mould axis coincidence, be equipped with the mould way in the middle of the fixing base, go up mould and last mould way sliding connection, supplementary pneumatic cylinder frame and fixing base fastening connection, the supplementary pneumatic cylinder output is equipped with the fixed plate, the fixed plate outside and last mould way sliding connection, it includes centre form and external mold to go up the mould, external mold upper end and fixed plate transmission are connected, be equipped with the die cavity on the external mold, centre form and die cavity sliding connection, subside pneumatic cylinder frame and fixed plate bottom side fastening connection, subside pneumatic cylinder output and centre form 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, the lower die is driven by outputting displacement through a jacking hydraulic cylinder, 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 guide is carried out through a fixing plate, the inner die and the outer die are driven 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, the middle area of the metal powder is subjected to punch forming, the outer die carries out sliding guide on the inner die through the die cavity, the middle of the metal powder is firstly punched through the inner die, the outer ring of the metal powder is punched through the outer ring of the outer die, and the friction force between the inner layer and the outer layer is improved through layering punching, in the pressing process, the friction force of the surface of the die and the flowing of the metal powder is greater than the dynamic friction force between the metal powder, the relative friction stroke between contact surfaces is increased through inner and outer layering, the friction is increased, the densification degree of a middle area is improved, the inner layer punching is carried out firstly, gas between the metal powder is conveniently removed, the middle layer is prevented from cracking, and the quality of finished products 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 slide way, the feeding pipe is a rigid pipe, the feeding pipe is driven to move along the feeding slide way through the feeding cylinder, so that the mounting seat is driven to contract, interference caused by descending of an upper die is prevented, the mounting seat is fixed through the feeding pipe, the spiral pipe is guided in a sliding way through the sliding groove, the distribution seat is provided with a distribution cavity, the distribution cavity is communicated with the discharge hole 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, the sprayed high-speed metal powder airflow generates reverse acting force on the spiral pipe, so that the spiral pipe spirally rises along the sliding groove, and the spiral pipe is driven to rotate, the centrifugal force that the spiral pipe rotated the production, make great metal powder and less metal powder carry out the layering, the instantaneous rotational speed of spiral 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 marginal 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, the metal powder of big granule is punched press through the great compressive stress of marginal layer, the deformation degree of large granule metal powder is increased, 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 hole, the floating block is arranged in the blending groove and is in sliding connection with the blending groove, the reset spring is arranged at one end, close to the mounting seat, of the floating block, the reset spring is far away from one end of the floating block and 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 by sliding 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 by the floating block to move, the gradient of the transmission pipe is ensured, so that 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 compression state, when the spiral pipe moves upwards spirally, the transmission pipe is gradually separated from the clamping groove, the winding number 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 ejecting 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 in spiral ascending rotating speed, and the instantaneous centrifugal force obtained by large-particle metal powder is increased, along with the accumulation of metal powder in the model cavity, the distance between the spiral pipe and the metal powder surface layer is reduced, the centrifugal distance of the unit height of the large-particle metal powder is increased by increasing the centrifugal force, and the metal powder layers with 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, the middle die hydraulic cylinder is arranged on the outer side of the die section, one side of the middle die hydraulic cylinder, far away from the die section, is in sliding connection with the guide groove, and the output end of the middle die hydraulic cylinder is in transmission connection with the die section.
Carry on spacingly through the ring gear to two well mould pneumatic cylinders, lead to the mould pneumatic cylinder through the guide way, well mould pneumatic cylinder output displacement drives the mould lamella and removes to make two mould lamella combinations and separation, improve drawing of patterns efficiency.
Furthermore, one side of the guide groove is provided with a mounting groove, the driving device further comprises a rotating motor, the rotating motor is arranged in the mounting groove, the output end of the rotating motor is provided with a gear, 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 draw-in groove passes through the spiral setting, makes transmission pipe winding part and the distribution seat in the draw-in groove closely laminate to improve transmission pipe transmission sensitivity, when the spiral pipe upwards rotates, the transmission pipe pine takes off in the draw-in groove, and reset spring adjusts transmission pipe gradient rapidly.
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-allocation groove, 22-distribution seat, 221-clamping groove, 222-distribution 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, 3311-die flap, 3312-middle mold channel, 332-gear ring, 333-middle mold hydraulic cylinder, 4-driving device, 41-jacking hydraulic cylinder, 42-settlement 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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, wherein 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 comprises a vertical column 11, an upper cross beam 12 is disposed at the upper end of the vertical column 11, a lower cross beam 13 is disposed at the lower end of the vertical 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 a space, the lower die assembly 32 comprises a guide seat 322, one side of the guide seat 322 is fastened to one end of the lower cross beam 13 far away from the vertical column 11, 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 1, the middle die assembly 33 is disposed in the guide groove 3221, the middle mold assembly 33 comprises a middle mold 331, the middle mold 331 comprises two mold sections 3311, a middle mold channel 3312 is arranged on the mold sections 3311, and the two middle mold channels 3312 compose a mold 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 fed through the feeding device 2, the metal powder is prevented from escaping through pipeline transmission and harms the body of surrounding operators, the driving device 4 is a main power source and drives and performs extrusion forming, the upright post is fixed through the lower cross beam 13, the upper cross beam 12 is fixed at the upper end of the upright post 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 which are arranged along the vertical direction, the demolding efficiency is improved through sectional design, the guide seat 322 is fixed on the lower cross beam 13 and performs stamping forming through the internally arranged working cavity 3222, the middle die component 33 is guided in a sliding mode through the guide groove 3221, the middle die 331 is designed in a sectional mode and is composed of two die sections 3311, the middle die component is convenient to split and demold finished products, two middle die channels 3312 form a die cavity, the lower die moves at the lower section of the die cavity, the upper die moves at the upper section of the die cavity, metal powder is punched in a double-sided mode, the upper layer powder and the lower layer powder are made to be even in friction with the middle die wall, and the punching quality is improved.
As shown in fig. 1 to 6, the lower mold assembly 32 further includes a lower mold 321, the circumference of the lower mold 321 is matched with the mold cavity, the driving device 4 includes a jacking hydraulic cylinder 41, a settling hydraulic cylinder 42 and an auxiliary hydraulic cylinder 43, the outer frame of the jacking hydraulic cylinder 41 is fastened to the side wall of the working cavity 3222, the output end of the jacking hydraulic cylinder 41 is connected to the lower mold 321 in a transmission manner, 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 beam 12, the axes of the upper mold 311 and the lower mold 321 are overlapped, an upper mold 3121 is disposed in the middle of the fixed seat 312, the upper mold 311 is slidably connected to the upper mold 3121, the outer frame of the auxiliary hydraulic cylinder 43 is fastened to the fixed seat 312, the output end of the auxiliary hydraulic cylinder 43 is provided with a fixed plate 44, the outer side of the fixed plate 44 is slidably connected to the upper mold 3121, the upper mold 311311 includes an inner mold 3112 and an outer mold 3112, the upper end of the outer mold 3112 is connected to the fixed plate 44 in a transmission manner, a mold cavity is disposed on the outer mold 2, centre form 3111 and die cavity sliding connection, subside pneumatic cylinder 42 frame and fixed plate 44 bottom side fastening connection, subside pneumatic cylinder 42 output and centre form 3111 transmission connection.
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 vertical direction in the mold cavity, 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 inner mold 3111 and the outer mold 3112 are driven to move in the vertical direction through the fixing plate 44 for metal powder molding, 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 middle area of the metal powder is subjected to punch molding, the outer mold 3112 slides to guide the inner mold 3111 through the mold cavity, the middle of the metal powder is firstly punched through the inner mold 3111, the outer mold 3112 punches the outer ring of the metal powder, through layering punching press, improve the internal and external interlaminar frictional force, in the pressing process, the frictional force that mould lamella 3311 surface and metal powder flow is greater than the kinetic friction power between the metal powder, through internal and external layering, increases the relative friction stroke between the contact surface, increases the friction, improves the degree of densification of middle zone, advanced internal row punching press is convenient for get rid of the gas between the metal powder, prevents that the intermediate level from appearing the crack, improves finished product quality.
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 provided on one side of a guide seat 322, the feeding chute is communicated with a working chamber 3222, an opening is provided 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 provided 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 connected with the mounting seat 24 in a fastening manner, a through hole is provided on the mounting seat 24, a chute 241 is provided along an inner wall surface of the through hole, the spiral pipe 241 is spirally provided, the spiral pipe 23 is connected with the chute 241 in a sliding manner, the distribution seat 22 is provided on the upper side of the spiral pipe 23, the distribution cavity 222 is communicated with the spiral pipe 23, a discharge port 211 is provided on one side of the feeding pipe 21, one end of the transmission pipe 25 is communicated with the discharge port 211, a through hole is provided on one side of the distribution cavity 222, the end of the conveying pipe 25 far away from the discharge hole 211 is communicated with the distribution cavity 222 through a through hole.
The metal powder is input through the feeding pipe 21, the metal powder is transmitted through the fan, so that the metal powder forms high-speed airflow and is blown into the feeding pipe 21, the input efficiency is improved, the feeding cylinder 26 is fixed through the 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, so as to drive the mounting seat 24 to contract, interference on the descending of the upper die 311 is prevented, the mounting seat 24 is fixed through the feeding pipe 21, the spiral pipe 23 is guided in a sliding manner through the sliding groove 241, the distribution seat 22 is provided with a distribution cavity 222, the distribution cavity 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 into 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, and the sprayed high-speed metal powder airflow generates reverse acting force on the spiral pipe 23, the spiral tube 23 is spirally lifted along the chute 241 to drive 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 is large, the larger metal powder is thrown to one side close to the wall surface of the middle die way 3312 and is positioned at the edge layer, the smaller powder is left at the middle layer, the friction between the metal powder and the wall surface of the middle die way 3312 is large, and 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 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 regulating groove 212 is formed in the lower side of the discharge hole 211, the floating block 27 is arranged in the regulating groove 212, the floating block 27 is slidably connected with the regulating groove 212, the return spring 28 is arranged at one end of the floating block 27 close to the mounting seat 24, one end of the return spring 28 far away from the floating block 27 is fixedly connected with the wall surface of the regulating 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.
The floating block 27 is guided by sliding through the adjusting groove 212, the transmission pipe 25 is driven to move by the floating block 27 along with the upward movement of the spiral pipe 23 at the upper end of the transmission pipe 25, the inclination of the transmission pipe 25 is ensured, thereby reducing the friction area, preventing the overlarge inclination angle, reducing the kinetic energy loss of the metal powder in the transmission pipe 25, ensuring the transmission speed of the metal powder, the initial state of the reset spring 28 is a compression state, when the spiral pipe 23 spirally moves upwards, the transmission pipe 25 gradually separates from the clamping groove 221, reducing the winding number of turns of the transmission pipe 25 on the clamping groove 221, reducing the friction loss of the kinetic energy, improving the airflow flowing speed of the metal powder in the transmission pipe 25, increasing the linear distance of the transmission pipe 25 from the floating block 27 to the clamping groove 221, improving the transmission smoothness, improving the ejection speed of the metal powder at the outlet at the bottom end of the spiral pipe 23, and enhancing the reverse acting force obtained by the spiral pipe 23, thereby make spiral pipe 23 spiral rising rotational speed increase, the instantaneous centrifugal force that the large granule metal powder obtained increases, and along with model intracavity metal powder piles up, the interval on spiral pipe 23 and metal powder top layer reduces, improves the centrifugal distance of large granule metal powder unit height through increasing centrifugal force, makes the not metal powder layering of co-altitude keep unanimous.
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, the 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 in transmission connection with 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, one side of the guiding groove 3221 is provided with a mounting groove, the driving device 4 further includes a rotating electrical machine 45, the rotating electrical machine 45 is disposed in the mounting groove, the output end of the rotating electrical machine 45 is provided with a gear 46, the gear 46 is engaged with the tooth surface of the gear ring 332, and the rotating electrical machine 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, the instantaneous rotating speed of the spiral pipe 23 is increased along with the reduction of roughness, 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 transmitted by the fan, so that the metal powder forms a high-speed airflow and is blown into the feeding pipe 21, and is sprayed out by the spiral pipe 23, a reverse acting force is generated to lead the spiral pipe 23 to spirally rise along the chute 241, thereby driving the spiral pipe to rotate, the centrifugal force generated by the rotation of the spiral pipe 23 leads the larger metal powder and the smaller metal powder to be layered, 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 powder is left at the middle layer, the friction between the metal powder and the wall surface of the middle die 3312 is large, the flowing property is poor, when the metal powder is punched by the upper die 311 and the lower die 321, the local compressive stress is large, the large metal powder is punched by the larger compressive stress at the edge layer, and the deformation degree of the large metal powder is increased, thereby improving mechanical engagement; 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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (8)
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), wherein 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), be equipped with working chamber (3222) on guide holder (322), lower mould (321) circumference size and model chamber size adaptation, drive arrangement (4) are including jacking pneumatic cylinder (41), subsides pneumatic cylinder (42) and auxiliary hydraulic cylinder (43), jacking pneumatic cylinder (41) frame and working chamber (3222) lateral wall fastening connection, and jacking pneumatic cylinder (41) output and lower mould (321) transmission are connected, go up mould subassembly (31) including mould (311) and fixing base (312), fixing base (312) one side and entablature (12) fastening connection, go up mould (311) and lower mould (321) axis coincidence.
2. The metal powder hydraulic device capable of double-sided press molding according to claim 1, characterized in that: 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 die assembly (33) is arranged in the guide groove (3221), the middle die assembly (33) comprises a middle die (331), the middle die (331) comprises two die sections (3311), a middle die channel (3312) is arranged on each die section (3311), the two middle die channels (3312) form a die cavity, the middle of the fixing seat (312) is provided with an upper die channel (3121), the upper die (311) is slidably connected with the upper die channel (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 die channel (3121), the upper die (311) comprises an inner die (3111) and an outer die (3112), and the upper end of the outer die (3112) is in transmission connection with the fixing plate (3112), the outer die (3112) is provided with a die cavity, the inner die (3111) is connected with the die cavity in a sliding mode, the outer frame of the sedimentation hydraulic cylinder (42) is fixedly connected with the bottom side of the fixed plate (44), and the output end of the sedimentation hydraulic cylinder (42) is in transmission connection with the inner die (3111).
3. The metal powder hydraulic device capable of double-sided press molding according to claim 2, characterized in that: the feeding device (2) comprises a feeding pipe (21), a distribution seat (22), a spiral pipe (23), a mounting seat (24) and a transmission pipe (25), a feeding slide way is arranged on one side of the guide seat (322), the feeding slide way is communicated with a working cavity (3222), an opening is formed in one side of the feeding slide way, one end of the feeding pipe (21) penetrates through the opening of the feeding slide way, a feeding cylinder (26) is arranged in the feeding slide way, the output end of the feeding cylinder (26) is in transmission connection with the feeding pipe (21), one end of the feeding pipe (21) far away from the opening is in fastening connection with the mounting seat (24), a through hole is formed in the mounting seat (24), a sliding groove (241) is formed in the inner wall surface of the through hole, the sliding groove (241) is spirally arranged, the spiral pipe (23) is in sliding connection with the sliding groove (241), the distribution seat (22) is arranged on the upper side of the spiral pipe (23), a distribution cavity (222) is formed in the distribution seat (22), the distribution cavity (222) is communicated with the spiral pipe (23), a discharge hole (211) is formed in one side of the feeding pipe (21), one end of the conveying pipe (25) is communicated with the discharge hole (211), a through hole is formed in one side of the distribution cavity (222), and one end, far away from the discharge hole (211), of the conveying pipe (25) is communicated with the distribution cavity (222) through the through hole.
4. The metal powder hydraulic device capable of double-sided press molding according to claim 3, characterized in that: 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).
5. The metal powder hydraulic device capable of double-sided press molding according to claim 2, characterized in that: well mould subassembly (33) still includes ring gear (332), two well mould pneumatic cylinder (333) are connected through 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.
6. The metal powder hydraulic device capable of double-sided press molding according to claim 2, 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.
7. The metal powder hydraulic device capable of double-sided press molding according to claim 4, 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).
8. The metal powder hydraulic device capable of double-sided press molding according to claim 7, characterized in that: the surface roughness of the spiral pipe (23) is gradually reduced from top to bottom.
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| CN202111253295.XA CN114101670B (en) | 2021-10-27 | 2021-10-27 | Metal powder hydraulic device capable of achieving double-sided stamping forming |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114871387A (en) * | 2022-04-21 | 2022-08-09 | 上海嘉朗实业南通智能科技有限公司 | Uniform-speed cooling equal-stress aluminum alloy casting mold device |
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| CN114101670B (en) | 2022-11-18 |
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