CN120079864B - High-precision continuous compression molding device and method for powder metallurgy blank with inner sink groove - Google Patents
High-precision continuous compression molding device and method for powder metallurgy blank with inner sink grooveInfo
- Publication number
- CN120079864B CN120079864B CN202510585350.7A CN202510585350A CN120079864B CN 120079864 B CN120079864 B CN 120079864B CN 202510585350 A CN202510585350 A CN 202510585350A CN 120079864 B CN120079864 B CN 120079864B
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- pressurizing
- pressing assembly
- powder metallurgy
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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
- B22F3/003—Apparatus, e.g. furnaces
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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
- B22F3/005—Loading or unloading powder metal objects
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
本发明公开了一种带内沉槽的粉末冶金坯件的高精密连续压制成型装置及方法，本发明涉及压制成型出带内沉槽的粉末冶金坯件的技术领域，它包括固设于工作台底表面上的液压马达，液压马达的输出轴向上贯穿工作台，且延伸端上固设有支撑于工作台台面上的旋转台，旋转台的左右端分别设置有用于对金属粉末进行压制的压制组件B和压制组件A。本发明的有益效果是：极大提高粉末冶金坯件压制质量、极大提高粉末冶金坯件压制成型效率。
The present invention discloses a high-precision continuous pressing and forming device and method for powder metallurgy blanks with inner sinking grooves, and the present invention relates to the technical field of pressing and forming powder metallurgy blanks with inner sinking grooves, which comprises a hydraulic motor fixedly arranged on the bottom surface of a workbench, the output shaft of the hydraulic motor upwardly penetrates the workbench, and a rotating table supported on the workbench table surface is fixedly arranged on the extended end, and a pressing assembly B and a pressing assembly A for pressing metal powder are respectively arranged at the left and right ends of the rotating table. The beneficial effects of the present invention are: greatly improving the pressing quality of powder metallurgy blanks and greatly improving the pressing and forming efficiency of powder metallurgy blanks.
Description
Technical Field
The invention relates to the technical field of powder metallurgy blanks with internal sink grooves formed by compression molding, in particular to a high-precision continuous compression molding device and method for powder metallurgy blanks with internal sink grooves.
Background
The structure of a powder metallurgy blank M with inner sinking grooves is shown in fig. 1-2, the whole powder metallurgy blank M1 is round, inner sinking grooves 2 with rectangular cross sections are formed on the left and right cylindrical surfaces of the powder metallurgy blank M1, the two inner sinking grooves 2 are symmetrical left and right, the two inner sinking grooves 2 are in a horizontal state, and the two inner sinking grooves 2 are used for inserting a rod piece for transmission.
The powder metallurgy blank M1 is formed by pressing a certain amount of metal powder by a pressing forming device, after a batch of powder metallurgy blanks M1 shown in fig. 1-2 are pressed, workers put the powder metallurgy blanks M1 into a sintering furnace, sinter the powder metallurgy blanks M1 by the sintering furnace, and after sintering is finished, a high-strength mechanical part is obtained.
A certain workshop uses a compression molding device shown in fig. 3 to compress a required number of powder metallurgy blanks M1, the compression molding device comprises a portal frame 3 fixedly arranged on a bottom plate, a stand column 4 fixedly arranged on the top surface of the bottom plate and two jacking cylinders 5, the two jacking cylinders 5 are respectively positioned at the left side and the right side of the stand column 4, a jacking plate 6 is welded between the acting ends of piston rods of the two jacking cylinders 5, a vertically arranged die 7 is welded in the jacking plate 6, an inner cavity 8 of the die 7 penetrates through the top surface and the bottom surface of the die 7, and an inner cavity 8 of the die 7 is sleeved at the upper end part of the stand column 4;
the top surface of the jacking plate 6 is fixedly provided with two horizontal oil cylinders 9 which are respectively positioned at the left side and the right side of the die 7, the acting ends of piston rods of the two horizontal oil cylinders 9 are fixedly provided with bar blocks 10, the inner side ends of the bar blocks 10 extend into the inner cavity 8 of the die 7, the two bar blocks 10 are opposite left and right, the top surface of a cross beam of the portal frame 3 is fixedly provided with a pressurizing oil cylinder 11, the piston rods of the pressurizing oil cylinders 11 penetrate through the cross beam downwards, the extending ends are connected with pressure heads 12, and the pressure heads 12 are positioned right above the inner cavity 8 of the die 7.
The method for pressing the powder metallurgy blank M1 by workers in a workshop by using the pressing and forming equipment comprises the following steps:
The Sa and workers pour the weighed metal powder into the inner cavity 8 of the die 7 from top to bottom in the direction shown by the arrow in fig. 4, at this time, the metal powder is supported on the top surface of the upright 4, and the inner side ends of the two bar-shaped blocks 10 are covered, so that the inner cavity 8 of the die 7 is filled with the metal powder;
Sb, a worker controls a piston rod of the pressurizing oil cylinder 11 to extend downwards, the piston rod drives the pressure head 12 to move downwards, the pressure head 12 extends into the inner cavity 8 of the die 7 from top to bottom and gradually pressurizes metal powder, and the metal powder becomes compact under pressurization;
sc, the first powder metallurgy blank M1 is taken away, and the specific operation steps are as follows:
sc1, controlling the piston rods of the two horizontal cylinders 9 to retract, wherein the piston rods drive the bar blocks 10 to move outwards, the bar blocks 10 gradually withdraw from the powder metallurgy blank M1, and when the piston rods of the horizontal cylinders 9 are completely retracted, the bar blocks 10 can be completely withdrawn from the powder metallurgy blank M1, as shown in FIG. 7;
Sc2, controlling the piston rods of the pressurizing cylinders 11 to retract upwards, driving the pressure heads 12 to retract upwards so as to reset the pressure heads 12, then controlling the piston rods of the two jacking cylinders 5 to retract downwards, driving the jacking plates 6 to move downwards, and driving the horizontal cylinders 9 and the die 7 to move downwards relative to the static powder metallurgy blank M1 by the jacking plates 6, wherein when the piston rods of the jacking cylinders 5 retract completely, the powder metallurgy blank M1 is just exposed outside the die 7, as shown in figure 8, and at the moment, a worker takes away the powder metallurgy blank M1, and the taking-away direction is shown by an arrow in figure 8;
sd, the worker repeatedly performs the steps Sa-Sc for a plurality of times, and then continuously presses and forms a plurality of powder metallurgy blanks M1.
However, such a compacting apparatus, while capable of compacting the desired powder metallurgical blank M1, often reflects the following technical drawbacks during practical use:
I. In step Sb, since the inner ends of the two bar blocks 10 are in suspended state, when the pressing head 12 presses the metal powder, the pressure of the pressing head 12 is transmitted to the inner ends of the two bar blocks 10, so that the inner ends of the two bar blocks 10 are bent and deformed downward, the deformation direction of the inner ends of the bar blocks 10 is shown by the arrow in fig. 6, and the two inner sink grooves 2 of the pressed powder metallurgy blank M1 are inclined (while the two inner sink grooves 2 of the powder metallurgy blank M1 required to be pressed are horizontal), which clearly reduces the pressing quality of the powder metallurgy blank M1, and has the technical defect of low pressing precision, and the pressed powder metallurgy blank M1 cannot meet the requirements of high-end customers.
II. In steps Sa to Sd, only after the worker fills the metal powder into the cavity 8 of the die 7, a powder metallurgy blank M1 can be pressed, that is, the press forming apparatus can only press the powder metallurgy blanks M1 one by one, and continuous pressing of the powder metallurgy blanks M1 cannot be achieved, and the customer requires 200 to 211 powder metallurgy blanks M1 each day, which certainly causes a long time to be consumed to press the required number of powder metallurgy blanks M1, thereby reducing the press forming efficiency of the powder metallurgy blanks M1.
Therefore, there is a need for a high-precision continuous press forming device and method that greatly improves the press forming quality of powder metallurgy blanks and greatly improves the press forming efficiency of powder metallurgy blanks.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-precision continuous compression molding device and a method for a powder metallurgy blank with an inner sink, which can greatly improve the compression quality and the compression molding efficiency of the powder metallurgy blank.
The invention aims at realizing the technical scheme that the high-precision continuous compression molding device for the powder metallurgy blank with the inner sink comprises a hydraulic motor fixedly arranged on the bottom surface of a workbench, an output shaft of the hydraulic motor upwards penetrates through the workbench, a rotary table supported on the table surface of the workbench is fixedly arranged on an extending end, and a compression assembly B and a compression assembly A for compressing metal powder are respectively arranged at the left end and the right end of the rotary table;
the pressing assembly A positioned at the right side end of the rotary table comprises an L-shaped support and a cushion block which are fixedly arranged on the rotary table, wherein a vertical through groove and a horizontal through groove are respectively formed in a vertical seat and a horizontal seat of the L-shaped support, two lifting cylinders which are respectively positioned at the left side and the right side of the horizontal through groove are fixedly arranged on the top surface of the L-shaped support, piston rods of the two lifting cylinders downwards penetrate through the horizontal seat, lifting seats are fixedly connected to extension ends, guide rods penetrate through the lifting seats positioned at the right side in a sliding manner, a feeding cylinder penetrating through the vertical through groove to the left side is fixedly arranged on the left end surface of the lifting seat positioned at the left side, and a frame is welded between an action end of a piston rod of the feeding cylinder and the left end part of the guide rod;
The middle part of the frame is welded with a mould penetrating through the top and bottom surfaces of the frame, two horizontal oil cylinders respectively positioned at the left side and the right side of the mould are fixedly arranged in the frame, strip-shaped blocks are fixedly arranged at the action ends of the piston rods of the two horizontal oil cylinders, and the inner side ends of the two strip-shaped blocks extend into the inner cavity of the mould;
The vertical cylinder is characterized in that an upright post positioned under the die is fixedly arranged on the top surface of the cushion block, two vertical cylinders positioned on the right side of the upright post are further fixedly arranged on the top surface of the cushion block, a butt joint die is fixedly arranged between the acting ends of piston rods of the two vertical cylinders, a step groove penetrating through the top surface of the butt joint die is formed in the butt joint die, a second pressurizing cylinder is fixedly arranged on the bottom surface of the butt joint die, a piston rod of the second pressurizing cylinder stretches into a small groove of the step groove, and a second pressurizing block in sliding fit with the step groove is fixedly arranged on the extending end.
The bottom surface of the workbench is fixedly provided with a plurality of supporting legs which are supported on the ground.
The pressing assembly A and the pressing assembly B are symmetrically arranged left and right relative to the hydraulic motor.
A guide hole is formed in the lifting seat on the right side, and the guide rod is in sliding fit with the guide hole.
The two horizontal oil cylinders are symmetrically arranged on the left and right sides of the die, the two strip-shaped blocks are symmetrical on the left and right sides of the die, and the cross sections of the strip-shaped blocks are rectangular.
The outer contour of the first pressurizing block is matched with the inner cavity of the die, the diameter of the first pressurizing block is equal to that of the second pressurizing block, the upright post is matched with the inner cavity of the die, and the large groove of the step groove is matched with the outer contour of the die.
The top surface of cushion has set firmly two vertical hydro-cylinders, has set firmly the mounting panel between the action end of two vertical hydro-cylinder piston rods, the butt joint mould welds in the middle part of mounting panel, and the butt joint mould runs through the top bottom surface of mounting panel.
The high-precision continuous compression molding device further comprises a controller, wherein the controller is electrically connected with the hydraulic motor, the lifting oil cylinder, the feeding oil cylinder, the horizontal oil cylinder, the first pressurizing oil cylinder, the vertical oil cylinder and the second pressurizing oil cylinder through signal wires.
A method for high-precision continuous compression molding of powder metallurgy blanks with internal sink grooves, which comprises the following steps:
S1, filling metal powder into a pressing assembly A, wherein the specific operation steps are as follows:
S11, a worker stands on the front side of the workbench, a part of weighed metal powder is added into a step groove of a butt-joint die of the pressing assembly A from top to bottom, after the addition is finished, the part of metal powder is supported on the top surface of the second pressing block, and the small groove of the step groove is filled;
S12, controlling piston rods of two lifting cylinders of the pressing assembly A to extend downwards simultaneously, driving a lifting seat to move downwards by the piston rods, driving a feeding cylinder to move downwards by the lifting seat on the left side, simultaneously driving a guide rod to move downwards by the lifting seat on the right side, further driving a frame to synchronously move downwards, driving a die, a first pressurizing cylinder, two horizontal cylinders and two strip-shaped blocks to synchronously move downwards by the frame, controlling the lifting cylinders to close by a controller after the piston rods of the lifting cylinders extend to a set stroke, and enabling the lower end part of an inner cavity of the die to be just sleeved outside a stand column at the moment, and enabling the top surface of the stand column to be in contact with the bottom surfaces of the inner side ends of the two strip-shaped blocks;
S13, a worker adds another part of weighed metal powder into the inner cavity of the die of the pressing assembly A from top to bottom, after the addition is finished, the metal powder is supported on the top surface of the upright post, and the inner side ends of the two strip-shaped blocks are covered, so that the metal powder is finally filled into the pressing assembly A;
s2, a worker controls a hydraulic motor to start, an output shaft of the hydraulic motor drives a rotary table to rotate on a horizontal plane and cling to a table surface of a workbench, the rotary table drives a pressing assembly A and a pressing assembly B to synchronously rotate, when the rotary table rotates 180 degrees, a controller controls the hydraulic motor to be closed, at the moment, the pressing assembly A moves to the left side of the workbench, the pressing assembly B moves to the right side of the workbench, and the worker repeats the operation of the step S1 once to fill metal powder into the pressing assembly B;
s3, pressing and forming a first powder metallurgy blank N through a pressing assembly A, wherein the specific operation steps are as follows:
s31, controlling a piston rod of a first pressurizing oil cylinder of the pressing assembly A to extend downwards, wherein the piston rod drives a first pressurizing block to move downwards, the first pressurizing block extends into an inner cavity of a die from top to bottom and gradually pressurizes metal powder, and under pressurization, the metal powder becomes compact;
s32, controlling piston rods of two lifting cylinders of the pressing assembly A to retract upwards simultaneously, driving a lifting seat to move upwards, further driving a frame to move upwards synchronously, driving a die, a first pressurizing cylinder, two horizontal cylinders and two bar blocks to move upwards synchronously, gradually separating the die from a stand column, simultaneously driving an upper half blank to move upwards synchronously by the die, and enabling the die to move right above the stand column after the piston rods of the lifting cylinders are completely retracted;
S33, controlling a piston rod of a feeding oil cylinder of the pressing assembly A to extend leftwards, driving a frame to move leftwards by the piston rod, driving a die, a first pressurizing oil cylinder, two horizontal oil cylinders and two bar blocks to synchronously move leftwards by the frame, and driving an upper half blank to synchronously move leftwards by the die, wherein when the piston rod of the feeding oil cylinder extends completely, the die moves right above a step groove of the butt-joint die;
S34, controlling piston rods of two vertical cylinders of the pressing assembly A to extend upwards, enabling the piston rods to drive the mounting plate to move upwards, enabling the mounting plate to drive the butt joint die to move upwards, enabling the butt joint die to drive the second pressurizing cylinder, the second pressurizing block and metal powder in the second pressurizing block to move upwards synchronously, enabling a large groove of the butt joint die to be just sleeved at the lower end of the die after the piston rods of the vertical cylinders extend out completely, and enabling a step groove of the butt joint die to be communicated with an inner cavity of the die;
S35, controlling a piston rod of a second pressurizing oil cylinder of the pressing assembly A to extend upwards, driving a second pressurizing block to move upwards, pushing metal powder in a butt joint die into an inner cavity of a die by the second pressurizing block upwards, gradually pressing the metal powder onto an upper half blank under the gradual pressurizing of the second pressurizing block, and controlling the second pressurizing oil cylinder to be closed by a controller after the piston rod of the second pressurizing oil cylinder extends to a set stroke, so that the metal powder in the butt joint die is pressed into a lower half blank connected with the upper half blank into a whole, wherein the lower half blank and the upper half blank form a powder metallurgy blank N together, and finally, pressing and forming a first powder metallurgy blank N with two inner sinking grooves through the pressing assembly A;
S4, taking away the first powder metallurgy blank N, wherein the specific operation steps are as follows:
s41, controlling piston rods of two horizontal cylinders of the pressing assembly A to retract, wherein the piston rods drive the bar blocks to move outwards, the bar blocks gradually withdraw from the powder metallurgy blank N, and after the piston rods of the horizontal cylinders are completely retracted, the bar blocks can be completely withdrawn from the powder metallurgy blank N;
s42, controlling a piston rod of a first pressurizing oil cylinder of the pressing assembly A to retract upwards, driving a first pressurizing block to move upwards by the piston rod, separating the first pressurizing block from a powder metallurgy blank N, and then withdrawing from an inner cavity of a die;
S43, controlling a piston rod of a second pressurizing oil cylinder of the pressing assembly A to extend upwards, driving a second pressurizing block to move upwards by the piston rod, pushing a powder metallurgy blank N to move upwards by the second pressurizing block, and when the piston rod of the second pressurizing oil cylinder extends completely, ejecting the powder metallurgy blank N out of a die by the second pressurizing block, wherein a worker takes away the powder metallurgy blank N;
S5, a worker controls a hydraulic motor to start, an output shaft of the hydraulic motor drives a rotary table to rotate on a horizontal plane and cling to a table surface of a workbench, the rotary table drives a pressing assembly A and a pressing assembly B to synchronously rotate, after the rotary table rotates 180 degrees, a controller controls the hydraulic motor to be closed, at the moment, the pressing assembly A moves to the right side of the workbench, and the pressing assembly B moves to the left side of the workbench;
S6, the worker repeats the operation of the step S5 for a plurality of times, and the powder metallurgy blank N with the required number can be continuously and uninterruptedly pressed and formed through the alternately working pressing assembly A and the pressing assembly B.
The invention has the advantages of greatly improving the pressing quality of the powder metallurgy blank and greatly improving the pressing and forming efficiency of the powder metallurgy blank.
Drawings
FIG. 1 is an isometric view of a powder metallurgy blank M;
FIG. 2 is a schematic diagram of the main section of FIG. 1;
FIG. 3 is a schematic view of a press molding apparatus used in a plant;
FIG. 4 is a schematic view of a die of a press forming apparatus filled with metal powder;
FIG. 5 is a schematic view of a press forming apparatus for press forming a first powder metallurgy blank M;
FIG. 6 is an enlarged partial view of section I of FIG. 5;
FIG. 7 is a schematic view of the two bar blocks of the press forming apparatus fully withdrawn from the powder metallurgy blank M;
FIG. 8 is a schematic view of the powder metallurgy blank M exposed outside the die;
FIG. 9 is a schematic diagram of the structure of the present invention;
FIG. 10 is a schematic diagram of the main section of FIG. 9;
FIG. 11 is a schematic structural view of the pressing assembly A;
FIG. 12 is a schematic view in main section of FIG. 11;
FIG. 13 is a schematic view of the structure of an L-shaped support;
FIG. 14 is a schematic view in elevation of FIG. 13;
FIG. 15 is a schematic view of the connection of the feed cylinder, frame, mold and first pressurization cylinder of FIG. 12;
FIG. 16 is a schematic illustration of the connection of the horizontal ram of FIG. 12 to a bar block;
FIG. 17 is a schematic illustration of the connection of the vertical cylinder, mounting plate, docking die and second pressurized cylinder;
FIG. 18 is a schematic view of the butt die of FIG. 17;
FIG. 19 is a schematic view in elevation of FIG. 18;
FIG. 20 is a schematic view of the addition of a weighed portion of metal powder into the stepped slot of the butt die of press assembly A;
FIG. 21 is a schematic view of the lower end of the cavity of the mold being sleeved outside the column;
FIG. 22 is a schematic illustration of the addition of another portion of weighed metal powder into the interior cavity of the die of pressing assembly A;
FIG. 23 is a schematic view of the press assembly A moving to the left of the table;
FIG. 24 is an enlarged partial view of section II of FIG. 23;
FIG. 25 is a schematic view of a first pressurizing block pressing metal powder in a die into an upper half blank;
FIG. 26 is an isometric view of the upper blank;
FIG. 27 is a schematic view in elevation of FIG. 25;
FIG. 28 is a bottom view of FIG. 25;
FIG. 29 is a schematic view of the mold moving directly over the posts;
FIG. 30 is a schematic view of the mold motion abutting the mold directly above the step groove;
FIG. 31 is a schematic view of a large slot of a butt-joint die sleeved at the lower end of the die;
FIG. 32 is a schematic view of a second pressurizing block pressing the metal powder in the butt die into a lower blank half integrally joined to an upper blank half;
FIG. 33 is an isometric view of a press formed powder metallurgy blank N;
FIG. 34 is a schematic view in elevation of FIG. 33;
FIG. 35 is a schematic view of the complete withdrawal of the bar from the powder metallurgy blank N;
FIG. 36 is a schematic view of the first pressurizing block exiting from the interior cavity of the mold;
FIG. 37 is a schematic view of the powder metallurgy blank N being ejected out of the mold by the second presser;
In the figure:
1-powder metallurgy blank M, 2-internal sinking groove, 3-portal frame, 4-upright post, 5-jacking cylinder, 6-jacking plate, 7-mould, 8-inner cavity, 9-horizontal cylinder, 10-bar block, 11-pressurizing cylinder and 12-pressure head;
13-workbench, 14-hydraulic motor, 15-rotary table, 16-pressing component B, 17-pressing component A, 18-L-shaped support, 19-cushion block, 20-vertical through slot, 21-horizontal through slot, 22-lifting cylinder, 23-lifting seat, 24-guide rod, 25-feeding cylinder, 26-frame, 27-bracket, 28-first pressurizing cylinder and 29-first pressurizing block;
30-vertical oil cylinders, 31-butt-joint dies, 32-step grooves, 33-second pressurizing oil cylinders and 34-second pressurizing blocks;
35-upper half blank, 36-lower half blank, 37-powder metallurgy blank N.
Detailed Description
The invention is further described below with reference to the accompanying drawings, the scope of the invention not being limited to the following:
As shown in fig. 9-19, the high-precision continuous compression molding device for the powder metallurgy blank with the inner sink comprises a hydraulic motor 14 fixedly arranged on the bottom surface of a workbench 13, an output shaft of the hydraulic motor 14 upwards penetrates through the workbench 13, a rotary table 15 supported on the table surface of the workbench 13 is fixedly arranged at the extending end, a compression assembly B16 and a compression assembly A17 for compressing metal powder are respectively arranged at the left end and the right end of the rotary table 15, and a plurality of supporting legs supported on the ground are fixedly arranged on the bottom surface of the workbench 13. The press assemblies a17 and B16 are symmetrically disposed about the hydraulic motor 14.
The pressing component A17 positioned at the right side end of the rotary table 15 comprises an L-shaped support 18 and a cushion block 19 which are fixedly arranged on the rotary table 15, vertical through grooves 20 and horizontal through grooves 21 are respectively formed in a vertical seat and a horizontal seat of the L-shaped support 18, two lifting cylinders 22 which are respectively positioned at the left side and the right side of the horizontal through grooves 21 are fixedly arranged on the top surface of the L-shaped support 18, piston rods of the two lifting cylinders 22 downwards penetrate through the horizontal seat, lifting seats 23 are fixedly connected to the extending ends, guide rods 24 penetrate through the lifting seats 23 positioned at the right side in a sliding manner, and guide holes are formed in the lifting seats 23 positioned at the right side, and the guide rods 24 are in sliding fit with the guide holes. A feeding oil cylinder 25 penetrating the vertical through groove 20 leftwards is fixedly arranged on the left end face of the lifting seat 23 positioned at the left side, and a frame 26 is welded between the acting end of a piston rod of the feeding oil cylinder 25 and the left end part of the guide rod 24.
The middle part of the frame 26 is welded with a die 7 penetrating through the top and bottom surfaces of the frame 26, two horizontal oil cylinders 9 which are respectively positioned at the left side and the right side of the die 7 are fixedly arranged in the frame 26, bar-shaped blocks 10 are respectively fixedly arranged at the action ends of piston rods of the two horizontal oil cylinders 9, the inner side ends of the two bar-shaped blocks 10 extend into an inner cavity 8 of the die 7, a bracket 27 penetrating upwards through a horizontal through groove 21 is fixedly arranged on the top surface of the frame 26, a first pressurizing oil cylinder 28 is fixedly arranged on the top wall of the bracket 27, a first pressurizing block 29 positioned right above the die 7 is fixedly arranged at the action end of a piston rod of the first pressurizing oil cylinder 28, the two horizontal oil cylinders 9 are symmetrical left and right relative to the die 7, the two bar-shaped blocks 10 are symmetrical left and right relative to the die 7, and the cross section of the bar-shaped blocks 10 is rectangular.
The top surface of the cushion block 19 is fixedly provided with a stand column 4 positioned right below the die 7, the top surface of the cushion block 19 is also fixedly provided with two vertical oil cylinders 30 positioned on the right side of the stand column 4, a butt joint die 31 is fixedly arranged between the acting ends of piston rods of the two vertical oil cylinders 30, a step groove 32 penetrating through the top surface and the bottom surface of the butt joint die 31 is formed in the butt joint die 31, the bottom surface of the butt joint die 31 is fixedly provided with a second pressurizing oil cylinder 33, a piston rod of the second pressurizing oil cylinder 33 extends into a small groove of the step groove 32, and the extending end is fixedly provided with a second pressurizing block 34 in sliding fit with the step groove 32. Two vertical oil cylinders 30 are fixedly arranged on the top surface of the cushion block 19, a mounting plate is fixedly arranged between the acting ends of piston rods of the two vertical oil cylinders 30, the butt-joint die 31 is welded in the middle of the mounting plate, and the butt-joint die 31 penetrates through the top surface and the bottom surface of the mounting plate.
The outer contour of the first pressurizing block 29 is matched with the inner cavity 8 of the die 7, the diameter of the first pressurizing block 29 is equal to that of the second pressurizing block 34, the upright post 4 is matched with the inner cavity 8 of the die 7, and the large groove of the step groove 32 is matched with the outer contour of the die 7.
The high-precision continuous compression molding device further comprises a controller, wherein the controller is electrically connected with the hydraulic motor 14, the lifting oil cylinder 22, the feeding oil cylinder 25, the horizontal oil cylinder 9, the first pressurizing oil cylinder 28, the vertical oil cylinder 30 and the second pressurizing oil cylinder 33 through signal wires, a worker can control the starting or closing of the hydraulic motor 14 through the controller, and meanwhile, the lifting oil cylinder 22, the feeding oil cylinder 25, the horizontal oil cylinder 9, the first pressurizing oil cylinder 28, the vertical oil cylinder 30 and the second pressurizing oil cylinder 33 can be controlled to extend or retract through piston rods, so that the operation of the worker is facilitated, and the high-automation-degree hydraulic continuous compression molding device is characterized.
A method for high-precision continuous compression molding of powder metallurgy blanks with internal sink grooves, which comprises the following steps:
S1, filling metal powder into a pressing assembly A17, wherein the specific operation steps are as follows:
S11, a worker stands on the front side of the workbench 13, a part of weighed metal powder is added into the step groove 32 of the butt-joint die 31 of the pressing assembly A17 from top to bottom, the adding direction is shown by an arrow in FIG. 20, when the adding is finished, the part of metal powder is supported on the top surface of the second pressing block 34, and the small groove of the step groove 32 is filled;
S12, controlling piston rods of two lifting cylinders 22 of a pressing assembly A17 to extend downwards simultaneously, driving a lifting seat 23 to move downwards, driving a feeding cylinder 25 to move downwards by the lifting seat 23 positioned on the left side, simultaneously driving a guide rod 24 to move downwards by the lifting seat 23 positioned on the right side, further driving a frame 26 to synchronously move downwards, driving a die 7, a first pressurizing cylinder 28, two horizontal cylinders 9 and two bar blocks 10 to synchronously move downwards by the frame 26, controlling the lifting cylinders 22 to be closed by a controller after the piston rods of the lifting cylinders 22 extend to a set stroke, at the moment, just sleeving the lower end part of an inner cavity 8 of the die 7 outside a stand column 4, as shown in FIG. 21, and enabling the top surface of the stand column 4 to be in contact with the bottom surfaces of the inner side ends of the two bar blocks 10;
S13, a worker adds another part of weighed metal powder into the inner cavity 8 of the die 7 of the pressing assembly A17 from top to bottom, the adding direction is shown by an arrow in FIG. 22, when the adding is finished, the part of metal powder is supported on the top surface of the upright post 4, and the inner side ends of the two strip-shaped blocks 10 are covered, so that the pressing assembly A17 is finally filled with the metal powder;
S2, a worker controls the hydraulic motor 14 to start, an output shaft of the hydraulic motor 14 drives the rotary table 15 to rotate on a horizontal plane and cling to the table surface of the workbench 13, the rotary table 15 drives the pressing assembly A17 and the pressing assembly B16 to synchronously rotate, after the rotary table 15 rotates 180 degrees, the controller controls the hydraulic motor 14 to be closed, at the moment, the pressing assembly A17 moves to the left side of the workbench 13 as shown in fig. 23-24, the pressing assembly B16 moves to the right side of the workbench 13, and the worker repeats the operation of the step S1 once to fill metal powder into the pressing assembly B16;
S3, pressing and forming a first powder metallurgy blank N through a pressing assembly A17, wherein the specific operation steps are as follows:
S31, controlling a piston rod of a first pressurizing oil cylinder 28 of a pressing assembly A17 to extend downwards, driving a first pressurizing block 29 to move downwards, enabling the first pressurizing block 29 to extend into an inner cavity 8 of a die 7 from top to bottom and gradually pressurizing metal powder, and compacting the metal powder under pressurization, wherein when the piston rod of the first pressurizing oil cylinder 28 extends downwards to a set stroke, a controller controls the first pressurizing oil cylinder 28 to be closed, so that the metal powder in the die 7 is pressed into an upper half blank 35 with two inner sinking grooves 2, and the structure of the pressed upper half blank 35 is shown in fig. 26-28;
S32, controlling piston rods of two lifting cylinders 22 of a pressing assembly A17 to retract upwards simultaneously, driving a lifting seat 23 to move upwards, driving a frame 26 to move upwards synchronously, driving a die 7, a first pressurizing cylinder 28, two horizontal cylinders 9 and two bar-shaped blocks 10 to move upwards synchronously, gradually disengaging the die 7 from a stand column 4, simultaneously, driving an upper half blank 35 to move upwards synchronously by the die 7, and after the piston rods of the lifting cylinders 22 are completely retracted, moving the die 7 to be right above the stand column 4, as shown in FIG. 29;
s33, controlling a piston rod of a feeding oil cylinder 25 of a pressing assembly A17 to extend leftwards, driving a frame 26 to move leftwards by the piston rod, driving a die 7, a first pressurizing oil cylinder 28, two horizontal oil cylinders 9 and two bar blocks 10 to synchronously move leftwards by the frame 26, driving an upper half blank 35 to synchronously move leftwards by the die 7, and after the piston rod of the feeding oil cylinder 25 extends completely, enabling the die 7 to move right above a step groove 32 of a butt joint die 31, as shown in FIG. 30;
S34, controlling piston rods of two vertical oil cylinders 30 of a pressing assembly A17 to extend upwards, driving a mounting plate to move upwards by the piston rods, driving a butt joint die 31 to move upwards by the mounting plate, driving a second pressurizing oil cylinder 33, a second pressurizing block 34 and metal powder in the second pressurizing block to move upwards synchronously by the butt joint die 31, and when the piston rods of the vertical oil cylinders 30 extend completely, covering a large groove of the butt joint die 31 at the lower end part of a die 7 just as shown in FIG. 31, and communicating a step groove 32 of the butt joint die 31 with an inner cavity 8 of the die 7;
S35, controlling a piston rod of a second pressurizing oil cylinder 33 of a pressing assembly A17 to extend upwards, driving a second pressurizing block 34 to move upwards, pushing metal powder in a butt joint die 31 into an inner cavity of a die 7 by the second pressurizing block 34 upwards, gradually pressing the metal powder onto an upper half blank 35 under the gradual pressurizing of the second pressurizing block 34, controlling the second pressurizing oil cylinder 33 to be closed by a controller after the piston rod of the second pressurizing oil cylinder 33 extends to a set stroke, so as to press the metal powder in the butt joint die 31 into a lower half blank 36 connected with the upper half blank 35 into a whole, wherein the lower half blank 36 and the upper half blank 35 jointly form a powder metallurgy blank N37, and finally pressing the first powder metallurgy blank N37 with two inner sink grooves 2 through the pressing assembly A17, wherein the pressed powder metallurgy blank N37 has the structure shown in figures 33-34;
Wherein, in step S31, when the first pressurizing block 29 is pressing the metal powder in the die 7 into the upper half blank 35, the top surface of the upright 4 always contacts with the bottom surfaces of the inner side ends of the two bar blocks 10, the upright 4 supports the inner side ends of the two bar blocks 10 and overcomes the pressure from the first pressurizing block 29, thereby effectively avoiding the downward bending deformation of the two bar blocks 10 by the force applied by the first pressurizing block 29, and in step S35, when the second pressurizing block 34 is pressing the metal powder in the butt die 31 into the lower half blank 36, the inner side ends of the two bar blocks 10 are blocked by the upper half blank 35 and the first pressurizing block 29, thereby overcoming the pressure from the second pressurizing block 34, effectively avoiding the upward bending deformation of the inner side ends of the two bar blocks 10 by the force applied by the second pressurizing block 34, and further ensuring that the two inner sinking grooves 2 in the powder metallurgy N37 composed of the upper half blank 35 and the lower half blank 36 are in a horizontal state.
Therefore, compared with the powder metallurgy blank M1 pressed by the high-precision continuous pressing device shown in fig. 3-8, the two inner sinking grooves 2 in the pressed powder metallurgy blank N37 are in a horizontal state and have no inclination, so that the pressing quality of the powder metallurgy blank is greatly improved, the technical advantage of higher pressing precision is achieved, and the pressed powder metallurgy blank can meet the requirements of high-end customers.
S4, taking away the first powder metallurgy blank N37, wherein the specific operation steps are as follows:
S41, controlling piston rods of two horizontal oil cylinders 9 of the pressing assembly A17 to retract, wherein the piston rods drive the bar blocks 10 to move outwards, the bar blocks 10 gradually withdraw from the powder metallurgy blank N37, and after the piston rods of the horizontal oil cylinders 9 are completely retracted, the bar blocks 10 can be completely withdrawn from the powder metallurgy blank N37, as shown in FIG. 35;
s42, controlling a piston rod of a first pressurizing oil cylinder 28 of a pressing assembly A17 to retract upwards, driving a first pressurizing block 29 to move upwards by the piston rod, separating the first pressurizing block 29 from a powder metallurgy blank N37, and then withdrawing from an inner cavity 8 of a die 7, as shown in FIG. 36;
s43, controlling a piston rod of a second pressurizing oil cylinder 33 of the pressing assembly A17 to extend upwards, driving a second pressurizing block 34 to move upwards by the piston rod, pushing a powder metallurgy blank N37 to move upwards by the second pressurizing block 34, and when the piston rod of the second pressurizing oil cylinder 33 extends completely, just pushing the powder metallurgy blank N37 out of the die 7 by the second pressurizing block 34, as shown in FIG. 37, taking the powder metallurgy blank N37 away by a worker, wherein the taking-away direction is shown by an arrow in FIG. 37;
S5, a worker controls the hydraulic motor 14 to start, an output shaft of the hydraulic motor 14 drives the rotary table 15 to rotate on a horizontal plane and cling to the table surface of the workbench 13, the rotary table 15 drives the pressing assembly A17 and the pressing assembly B16 to synchronously rotate, when the rotary table 15 rotates 180 degrees, the controller controls the hydraulic motor 14 to be closed, at the moment, the pressing assembly A17 moves to the right side of the workbench 13, and the pressing assembly B16 moves to the left side of the workbench 13;
S6, the worker repeats the operation of the step S5 for a plurality of times, so that the powder metallurgy blank N37 with the required number can be continuously and uninterruptedly pressed and formed through the pressing assembly A17 and the pressing assembly B16 which work alternately.
As can be seen from steps S1 to S6, the high-precision continuous compression molding device can continuously and continuously compress the powder metallurgy blank N37 through the alternate working compression assembly A17 and the alternate working compression assembly B16 by the linkage cooperation of the hydraulic motor 14, the compression assembly A17 and the compression assembly B16. Therefore, compared with the pressing method shown in fig. 3-8, the high-precision continuous pressing device realizes continuous pressing of the powder metallurgy blank N37 with the quantity required by customers in a short time, and does not need workers to press the powder metallurgy blank piece by piece, so that the pressing efficiency of the powder metallurgy blank is greatly improved.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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 high-precision continuous compression molding device for the powder metallurgy blank with the inner sink is characterized by comprising a hydraulic motor (14) fixedly arranged on the bottom surface of a workbench (13), wherein an output shaft of the hydraulic motor (14) upwards penetrates through the workbench (13), a rotary table (15) supported on the table top of the workbench (13) is fixedly arranged at the extending end, and a compression assembly B (16) and a compression assembly A (17) for compressing metal powder are respectively arranged at the left end and the right end of the rotary table (15);
The pressing assembly A (17) positioned at the right side end of the rotary table (15) comprises an L-shaped support (18) and a cushion block (19) which are fixedly arranged on the rotary table (15), vertical through grooves (20) and horizontal through grooves (21) are respectively formed in a vertical seat and a horizontal seat of the L-shaped support (18), two lifting cylinders (22) which are respectively positioned at the left side and the right side of the horizontal through grooves (21) are fixedly arranged on the top surface of the L-shaped support (18), piston rods of the two lifting cylinders (22) downwards penetrate through the horizontal seat, lifting seats (23) are fixedly connected to the extending ends, a guide rod (24) is fixedly penetrated in a sliding manner in the lifting seat (23) positioned at the right side, a feeding cylinder (25) which penetrates through the vertical through grooves (20) to the left side is fixedly arranged on the left end face of the lifting seat (23) positioned at the left side, and a frame (26) is welded between the acting end of the piston rod of the feeding cylinder (25) and the left end of the guide rod (24);
The middle part of the frame (26) is welded with a die (7) penetrating through the top and bottom surfaces of the frame (26), two horizontal oil cylinders (9) which are respectively positioned at the left side and the right side of the die (7) are fixedly arranged in the frame (26), bar-shaped blocks (10) are fixedly arranged at the action ends of piston rods of the two horizontal oil cylinders (9), the inner side ends of the two bar-shaped blocks (10) extend into an inner cavity (8) of the die (7), a bracket (27) penetrating through a horizontal through groove (21) upwards is fixedly arranged on the top surface of the frame (26), a first pressurizing oil cylinder (28) is fixedly arranged on the top wall of the bracket (27), and a first pressurizing block (29) positioned right above the die (7) is fixedly arranged at the action end of the piston rod of the first pressurizing oil cylinder (28);
The vertical type die comprises a die (7), a cushion block (19), a vertical column (4) arranged right below the die (7) and two vertical oil cylinders (30) arranged right on the vertical column (4), a butt joint die (31) is fixedly arranged between the acting ends of piston rods of the two vertical oil cylinders (30), a step groove (32) penetrating through the top surface of the butt joint die (31) is formed in the butt joint die (31), a second pressurizing oil cylinder (33) is fixedly arranged on the bottom surface of the butt joint die (31), a piston rod of the second pressurizing oil cylinder (33) stretches into a small groove of the step groove (32), and a second pressurizing block (34) in sliding fit with the step groove (32) is fixedly arranged on the extending end;
the outer contour of the first pressurizing block (29) is matched with the inner cavity (8) of the die (7), the diameter of the first pressurizing block (29) is equal to that of the second pressurizing block (34), the upright post (4) is matched with the inner cavity (8) of the die (7), and the large groove of the step groove (32) is matched with the outer contour of the die (7).
2. The high-precision continuous compression molding device for powder metallurgy blanks with inner sink grooves according to claim 1, wherein a plurality of supporting legs supported on the ground are fixedly arranged on the bottom surface of the workbench (13).
3. A high-precision continuous press forming device for powder metallurgy blanks with sink grooves according to claim 2, wherein the press assembly A (17) and the press assembly B (16) are symmetrically arranged left and right with respect to the hydraulic motor (14).
4. A high-precision continuous compression molding device for a powder metallurgy blank with an inner sink groove according to claim 3, wherein a guide hole is formed in a lifting seat (23) on the right side, and the guide rod (24) is in sliding fit with the guide hole.
5. The high-precision continuous compression molding device for powder metallurgy blanks with inner sink grooves according to claim 4, wherein the two horizontal oil cylinders (9) are symmetrically arranged on the left and right sides of the die (7), the two strip-shaped blocks (10) are symmetrically arranged on the left and right sides of the die (7), and the cross section of each strip-shaped block (10) is rectangular.
6. The high-precision continuous compression molding device for the powder metallurgy blank with the inner sink groove, as set forth in claim 5, is characterized in that two vertical oil cylinders (30) are fixedly arranged on the top surface of the cushion block (19), a mounting plate is fixedly arranged between the acting ends of piston rods of the two vertical oil cylinders (30), the butt joint die (31) is welded in the middle of the mounting plate, and the butt joint die (31) penetrates through the top surface and the bottom surface of the mounting plate.
7. The high-precision continuous press forming device for powder metallurgy blanks with inner sink grooves according to claim 6, wherein the high-precision continuous press forming device further comprises a controller, and the controller is electrically connected with the hydraulic motor (14), the lifting oil cylinder (22), the feeding oil cylinder (25), the horizontal oil cylinder (9), the first pressurizing oil cylinder (28), the vertical oil cylinder (30) and the second pressurizing oil cylinder (33) through signal wires.
8. A method for high-precision continuous press forming of a powder metallurgy blank with an internal sink, which is characterized in that the method comprises the following steps:
s1, filling metal powder into a pressing assembly A (17), wherein the specific operation steps are as follows:
S11, a worker stands on the front side of a workbench (13), a part of weighed metal powder is added into a step groove (32) of a butt-joint die (31) of a pressing assembly A (17) from top to bottom, after the addition is finished, the part of metal powder is supported on the top surface of a second pressing block (34), and the small groove of the step groove (32) is filled;
S12, controlling piston rods of two lifting cylinders (22) of a pressing assembly A (17) to extend downwards simultaneously, driving a lifting seat (23) to move downwards, driving a feeding cylinder (25) to move downwards by the lifting seat (23) positioned on the left side, simultaneously driving a guide rod (24) to move downwards by the lifting seat (23) positioned on the right side, further driving a frame (26) to synchronously move downwards, driving a die (7), a first pressurizing cylinder (28), two horizontal cylinders (9) and two bar blocks (10) to synchronously move downwards by the frame (26), controlling the lifting cylinders (22) to be closed by a controller after the piston rods of the lifting cylinders (22) extend to a set stroke, and at the moment, enabling the lower end part of an inner cavity (8) of the die (7) to be just sleeved outside a stand column (4) and enabling the top surface of the stand column (4) to be in contact with the bottom surfaces of the inner side ends of the two bar blocks (10);
s13, a worker adds another part of weighed metal powder into an inner cavity (8) of a die (7) of the pressing assembly A (17) from top to bottom, after the addition is finished, the part of metal powder is supported on the top surface of the upright post (4), and the inner side ends of the two strip-shaped blocks (10) are covered, so that the pressing assembly A (17) is finally filled with the metal powder;
S2, a worker controls a hydraulic motor (14) to start, an output shaft of the hydraulic motor (14) drives a rotary table (15) to rotate on a horizontal plane and clings to a table surface of a workbench (13), the rotary table (15) drives a pressing assembly A (17) and a pressing assembly B (16) to synchronously rotate, when the rotary table (15) rotates for 180 degrees, a controller controls the hydraulic motor (14) to be closed, at the moment, the pressing assembly A (17) moves to the left side of the workbench (13), the pressing assembly B (16) moves to the right side of the workbench (13), and the worker repeats the operation of the step S1 once to fill metal powder into the pressing assembly B (16);
s3, pressing and forming a first powder metallurgy blank N through a pressing assembly A (17), wherein the specific operation steps are as follows:
S31, controlling a piston rod of a first pressurizing oil cylinder (28) of a pressing assembly A (17) to extend downwards, driving a first pressurizing block (29) to move downwards, enabling the first pressurizing block (29) to extend into an inner cavity (8) of a die (7) from top to bottom and gradually pressurizing metal powder, and enabling the metal powder to be compact under pressurization;
S32, controlling piston rods of two lifting cylinders (22) of a pressing assembly A (17) to retract upwards simultaneously, driving a lifting seat (23) to move upwards, further driving a frame (26) to move upwards synchronously, driving a die (7), a first pressurizing cylinder (28), two horizontal cylinders (9) and two bar blocks (10) to move upwards synchronously, gradually separating the die (7) from a stand column (4), simultaneously, driving an upper half blank (35) to move upwards synchronously by the die (7), and enabling the die (7) to move right above the stand column (4) after the piston rods of the lifting cylinders (22) are completely retracted;
S33, controlling a piston rod of a feeding oil cylinder (25) of a pressing assembly A (17) to extend leftwards, driving a frame (26) to move leftwards by the piston rod, driving a die (7), a first pressurizing oil cylinder (28), two horizontal oil cylinders (9) and two bar-shaped blocks (10) to synchronously move leftwards, driving an upper half blank (35) to synchronously move leftwards by the die (7), and enabling the die (7) to move right above a step groove (32) of a butt joint die (31) after the piston rod of the feeding oil cylinder (25) extends completely;
S34, controlling piston rods of two vertical oil cylinders (30) of a pressing assembly A (17) to extend upwards, driving a mounting plate to move upwards by the piston rods, driving a butt joint die (31) to move upwards by the mounting plate, driving a second pressurizing oil cylinder (33), a second pressurizing block (34) and metal powder in the second pressurizing block to move upwards synchronously by the butt joint die (31), and when the piston rods of the vertical oil cylinders (30) extend completely, sleeving a large groove of the butt joint die (31) at the lower end part of a die (7) just, and communicating a step groove (32) of the butt joint die (31) with an inner cavity (8) of the die (7);
S35, controlling a piston rod of a second pressurizing oil cylinder (33) of the pressing assembly A (17) to extend upwards, driving a second pressurizing block (34) to move upwards by the piston rod, pushing metal powder in a butt joint die (31) into an inner cavity of a die (7) upwards by the second pressurizing block (34), gradually pressing the metal powder onto an upper half blank (35) under the gradual pressurizing of the second pressurizing block (34), and controlling the second pressurizing oil cylinder (33) to be closed by a controller after the piston rod of the second pressurizing oil cylinder (33) extends to a set stroke, so that the metal powder in the butt joint die (31) is pressed into a lower half blank (36) connected with the upper half blank (35) into a whole, and forming a powder metallurgy blank N (37) by the lower half blank (36) and the upper half blank (35) together, so that the first powder metallurgy blank N (37) with two inner sinking grooves (2) is finally pressed and formed by the pressing assembly A (17);
s4, taking away a first powder metallurgy blank N (37), wherein the specific operation steps are as follows:
S41, controlling piston rods of two horizontal cylinders (9) of the pressing assembly A (17) to retract, wherein the piston rods drive the bar blocks (10) to move outwards, the bar blocks (10) gradually withdraw from the powder metallurgy blank N (37), and when the piston rods of the horizontal cylinders (9) are completely retracted, the bar blocks (10) can be completely withdrawn from the powder metallurgy blank N (37);
S42, controlling a piston rod of a first pressurizing oil cylinder (28) of the pressing assembly A (17) to retract upwards, driving a first pressurizing block (29) to move upwards by the piston rod, separating the first pressurizing block (29) from a powder metallurgy blank N (37) firstly, and then withdrawing from an inner cavity (8) of the die (7);
S43, controlling a piston rod of a second pressurizing oil cylinder (33) of the pressing assembly A (17) to extend upwards, driving a second pressurizing block (34) to move upwards by the piston rod, pushing a powder metallurgy blank N (37) to move upwards by the second pressurizing block (34), and when the piston rod of the second pressurizing oil cylinder (33) extends completely, just pushing the powder metallurgy blank N (37) out of a die (7) by the second pressurizing block (34), and taking the powder metallurgy blank N (37) away by a worker;
S5, a worker controls a hydraulic motor (14) to start, an output shaft of the hydraulic motor (14) drives a rotary table (15) to rotate on a horizontal plane and cling to a table surface of a workbench (13), the rotary table (15) drives a pressing assembly A (17) and a pressing assembly B (16) to synchronously rotate, when the rotary table (15) rotates for 180 degrees, a controller controls the hydraulic motor (14) to be closed, at the moment, the pressing assembly A (17) moves to the right side of the workbench (13) and the pressing assembly B (16) moves to the left side of the workbench (13), then the worker fills new metal powder in the pressing assembly A (17) again, and then the worker repeats the operation of steps S3-S4 once, so that a second powder metallurgy blank N (37) is pressed through the pressing assembly B (16);
S6, the worker repeats the operation of the step S5 for a plurality of times, so that the powder metallurgy blank N (37) with the required number can be continuously and uninterruptedly pressed by the pressing assembly A (17) and the pressing assembly B (16) which work alternately.
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| CN120079864A (en) | 2025-06-03 |
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