CN114101668A - Powder metallurgy sintering device and method applied to multi-structural-piece synchronous processing - Google Patents

Abstract

The invention discloses a powder metallurgy sintering device and a method applied to synchronous processing of multi-structural parts, wherein the powder metallurgy sintering device comprises a processing box and a multi-structural processing die; the processing box comprises a box body and a box cover, the multi-structure processing die comprises a female die and a male die, the female die is distributed with three layers of female die cavities in a laminating mode from inside to outside, a plurality of spiral heating pipes are embedded in the female die, the spiral heating pipes are sleeved outside each layer of female die cavity in a one-to-one correspondence mode, and each layer of female die cavities and the spiral heating pipes are arranged alternately; three layers of convex modules are distributed on the convex die in a stacking mode from inside to outside, each layer of convex modules corresponds to the concave die cavity of the corresponding vertical layer, and a heating block is embedded in each layer of convex die block. The powder metallurgy sintering device and the powder metallurgy sintering method applied to multi-structural-piece synchronous processing provided by the invention can finish metallurgy sintering processing of various workpieces at one time, greatly improve the processing efficiency, realize uniform heating supply and quick unloading, and are suitable for large-scale popularization.

Description

Powder metallurgy sintering device and method applied to multi-structural-piece synchronous processing

Technical Field

The invention belongs to the technical field of powder metallurgy sintering, and particularly relates to a powder metallurgy sintering device and method applied to synchronous processing of multiple structural parts.

Background

The existing metallurgical sintering processing equipment is limited by the limitations of heating environment and structural characteristics, only one workpiece can be processed at a time, the metallurgical sintering processing efficiency is low, and the productivity of the workpiece is greatly influenced. Therefore, the layout of the equipment structure and the heating environment needs to be redesigned, so as to design the metallurgical sintering equipment capable of producing workpieces in batches. Based on the reasons, the powder metallurgy sintering device and the powder metallurgy sintering method applied to multi-structural-piece synchronous processing are designed, the metallurgy sintering processing of various workpieces can be completed at one time, the processing efficiency is greatly improved, the heating supply is uniform, the discharging is rapid, and the powder metallurgy sintering device and the powder metallurgy sintering method are suitable for large-scale popularization.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the powder metallurgy sintering device and the powder metallurgy sintering method applied to multi-structural-piece synchronous processing, which can finish the metallurgy sintering processing of various workpieces at one time, greatly improve the processing efficiency, realize uniform heating supply and quick discharging, and are suitable for large-scale popularization.

The technical scheme is as follows: in order to achieve the aim, the invention provides a powder metallurgy sintering device applied to multi-structure synchronous processing, which comprises a processing box and a multi-structure processing die; the processing box comprises a box body and a box cover, the top of the box cover is provided with a vibrator and is connected with a vertical cylinder through an elastic connecting piece, the box cover can be driven by the vertical cylinder to move downwards to extend into the box body, and the box cover is in sliding sealing fit with the box body; the multi-structure processing die comprises a female die and a male die, wherein the female die is arranged in the box body, the male die is arranged at the bottom of the box cover, three layers of female die cavities are distributed on the female die in a stacking mode from inside to outside, a plurality of spiral heating pipes are embedded in the female die, the spiral heating pipes are sleeved outside each layer of female die cavity in a one-to-one correspondence mode, and each layer of female die cavity and the spiral heating pipes are alternately arranged; three layers of convex modules are distributed on the convex dies in a stacking mode from inside to outside, each layer of convex modules corresponds to the concave die cavity of the corresponding vertical layer, and a heating block is embedded in each layer of convex die block.

Furthermore, the three layers of female die cavities sequentially comprise a large cylindrical female die cavity, a plurality of small cylindrical female die cavities and an annular female die cavity from inside to outside, and the small cylindrical female die cavities are distributed around the large cylindrical female die cavity in a circumferential array; the three layers of convex modules are sequentially a large cylindrical convex module, a plurality of small cylindrical convex modules and an annular convex module from inside to outside, and the small cylindrical convex modules are distributed around the large cylindrical convex module in a circumferential array; wherein the content of the first and second substances,

the large cylindrical male die block corresponds to the large cylindrical female die cavity, and the large cylindrical male die block and the large cylindrical female die cavity are matched to sinter and process metal powder in the die cavity into a large cylindrical workpiece in a metallurgical manner;

the small cylindrical male die block corresponds to the small cylindrical female die cavity, and the small cylindrical male die block and the small cylindrical female die cavity are matched to sinter and process metal powder in the die cavity into a small cylindrical workpiece in a metallurgical manner;

the annular convex module corresponds to the annular concave die cavity, and the annular convex module and the annular concave die cavity are matched to sinter and process metal powder in the cavity into an annular workpiece in a metallurgical manner.

Further, the bottom of each cavity is of a detachable structure; wherein the content of the first and second substances,

the detachable bottom of the large cylindrical female die cavity is a large cylindrical detachable template, the bottom part of the box body right below the large cylindrical detachable template is a large cylindrical detachable box plate, the peripheral outline of the large cylindrical detachable box plate is slightly larger than the outline of the large cylindrical detachable template, the large cylindrical detachable template and the large cylindrical detachable box plate are connected through a first connecting body integrally formed with the large cylindrical detachable template, and the bottom of the large cylindrical detachable box plate is connected with a vertical large cylindrical workpiece unloading electric push rod;

the detachable bottom of the small cylindrical concave die cavity is a small cylindrical detachable template, the bottom part of the box body right below the small cylindrical detachable template is a small cylindrical detachable box plate, the peripheral outline of the small cylindrical detachable box plate is slightly larger than that of the small cylindrical detachable template, the small cylindrical detachable template and the small cylindrical detachable box plate are connected through a second connector integrally formed with the small cylindrical detachable template, and the bottom of the small cylindrical detachable box plate is connected with a vertical small cylindrical workpiece unloading electric push rod;

the detachable bottom of the annular concave die cavity is an annular detachable template, the bottom part of the box body right below the annular detachable template is an annular detachable box plate, the peripheral contour of the annular detachable box plate is slightly smaller than that of the annular detachable template, the annular detachable template and the annular detachable box plate are connected through a third connecting body integrally formed with the annular detachable template, and the bottom of the annular detachable box plate is connected with a vertical annular workpiece unloading electric push rod;

the device also comprises a horizontal pushing and blanking mechanism positioned on the side surface of the box body and a conveying device positioned below the box body; the horizontal pushing blanking mechanisms are two same in structure and are respectively distributed at the top and the bottom of the box body, the horizontal pushing blanking mechanism at the top is used for pushing annular workpieces on the annular detachable templates to fall onto the conveying device, and the horizontal pushing blanking mechanism at the bottom is used for pushing large cylindrical workpieces on the large cylindrical detachable templates and small cylindrical workpieces on the small cylindrical detachable templates to fall onto the conveying device.

Furthermore, the port of each concave die cavity is processed by chamfering to form an expanded structure.

Furthermore, a vacuumizing port is formed in the side face of the box body, a vacuumizing valve is connected to the vacuumizing port in a butt joint mode, and the vacuumizing valve is connected with vacuumizing equipment through a vacuumizing pipeline; the top of case lid has air inlet and gas vent, the air inlet is docked and is had the admission valve, the admission valve passes through the air inlet pipe connection protective atmosphere supply equipment, the gas vent is docked and is had discharge valve.

Further, an outer supporting upright post is arranged at the bottom of the box body; the die bottom is provided with interior support post, the outer bottom of die has the bottom interval through the interior bottom that support post supported and box, the lateral surface of die has the lateral part interval with the inside wall of box.

Furthermore, the outer side surface of the female die is provided with uniform through holes to form a hollow structure, and the through holes are communicated to the cavity where the spiral heating pipe located on the outermost layer is located.

A method for a powder metallurgy sintering device applied to multi-structural-piece synchronous processing comprises the following specific steps:

step S1: injecting metal powder into each female die cavity, then utilizing a vertical cylinder to provide downward movement driving force to enable the box cover to move downward and extend into the box body, and keeping the male die block not extending into the female die cavity; opening a vacuum-pumping valve, firstly, utilizing vacuum-pumping equipment to slowly pump out air in the box body, then opening an air inlet valve, utilizing protective atmosphere supply equipment to slowly flush protective atmosphere into the box body, and keeping the flushing speed of the protective atmosphere to be greater than the air pumping speed until the box body and each concave die cavity are filled with the protective atmosphere;

step S2: the convex module continuously moves downwards to extend into the corresponding concave cavity and keeps a state of pressing the metal powder downwards, then, the vibrator is started to drive the box cover and the convex module to vertically vibrate together, so that the metal powder in the concave cavity is vibrated and compacted, and the vibrator is closed after the metal powder is compacted;

step S3: the female die is heated by the spiral heating pipe, and the male die is heated by the heating block, so that the surrounding high-temperature sintering operation of the metal powder in each female die cavity is realized by the matched heat transfer of the female die and the male die, and the high-temperature heating is more sufficient and uniform; meanwhile, due to the arrangement of the through holes on the side surface of the female die, heat is transferred inside and outside the female die by taking protective atmosphere as a medium, the internal environment of the box body is kept in a high-temperature state, the metallurgical sintering operation is facilitated, and the quality is improved;

the sintering workpiece in the large cylindrical female die cavity is a large cylindrical workpiece, the sintering workpiece in the small cylindrical female die cavity is a small cylindrical workpiece, and the sintering workpiece in the annular female die cavity is an annular workpiece, so that the three workpieces are sintered in a metallurgical manner at one time, and the processing efficiency is greatly improved;

step S4: after the sintering and forming of the workpiece are finished, opening an exhaust valve to deflate; then, the vertical cylinder and the three electric push rods are synchronously started, the three electric push rods are synchronously shortened while the vertical cylinder pushes down, so that the convex module is utilized to push down and movably separate the workpiece bonded in the cavity of the corresponding female die, then the three electric push rods stop, and the vertical cylinder drives the convex module to move upwards and reset; then, the large cylindrical workpiece unloading electric push rod and the small cylindrical workpiece unloading electric push rod respectively support the large cylindrical workpiece and the small cylindrical workpiece to fall below the box body, the annular workpiece unloading electric push rod pushes the annular workpiece to move upwards to the upper surface of the box body, and then the large cylindrical workpiece, the small cylindrical workpiece and the annular workpiece are pushed together to fall onto the conveying device to be conveyed by the two horizontal pushing and unloading mechanisms.

Has the advantages that: the powder metallurgy sintering device and method applied to multi-structural-piece synchronous processing have the following beneficial effects:

1) the invention can finish the metallurgical sintering processing of various workpieces at one time, and compared with the existing processing equipment for a single workpiece, the processing efficiency is greatly improved, the heating supply is uniform, the discharging is rapid, the quality is ensured, and the productivity is improved;

2) the processing method disclosed by the invention is reasonable in layout, further improves the processing efficiency and the product quality, and is suitable for large-scale popularization and application.

Drawings

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the overall structure of the present invention;

FIG. 3 is a schematic view of a half-section structure of a box body and a female die;

FIG. 4 is a schematic view of a half-section structure of the case cover and the male die;

FIG. 5 is a schematic structural view of a case cover extending into a case body to match a male die and a female die;

FIG. 6 is a schematic view showing a large cylindrical workpiece, a small cylindrical workpiece, and an annular workpiece being horizontally pushed and blanked.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, a powder metallurgy sintering apparatus for simultaneous processing of multiple structural members includes a processing box 1 and a multiple structural processing die 2; the processing box 1 comprises a box body 11 and a box cover 12, a vibrator 3 is arranged at the top of the box cover 12, and a vertical cylinder 5 is connected with the box cover 12 through an elastic connecting piece 4, the box cover 12 can be driven by the vertical cylinder 5 to move downwards and extend into the box body 11, and the box cover 12 is in sliding sealing fit with the box body 11; a vacuumizing port 11.1 is formed in the side face of the box body 11, a vacuumizing valve 11.2 is butted on the vacuumizing port 11.1, and the vacuumizing valve 11.2 is connected with vacuumizing equipment 11.4 through a vacuumizing pipeline 11.3; the top of the box cover 12 is provided with an air inlet 12.1 and an air outlet 12.2, the air inlet 12.1 is butted with an air inlet valve 12.3, the air inlet valve 12.3 is connected with a protective atmosphere supply device 12.5 through an air inlet pipeline 12.4, and the air outlet 12.2 is butted with an air outlet valve 12.6; the multi-structure processing die 2 comprises a female die 21 arranged in a box body 11 and a male die 22 arranged at the bottom of a box cover 12, wherein the female die 21 is provided with three layers of female die cavities 210 in a laminated mode from inside to outside, a plurality of spiral heating pipes 23 are embedded in the female die 21, the spiral heating pipes 23 are correspondingly sleeved outside each layer of female die cavity 20 one by one, and each layer of female die cavities 210 and the spiral heating pipes 23 are alternately arranged; three layers of male die blocks 220 are distributed on the male die 22 from inside to outside in a stacking mode, each layer of male die blocks 220 corresponds to the female die cavities 210 of the corresponding vertical layer, and heating blocks 24 are embedded in each layer of male die blocks 220. The invention can finish the metallurgical sintering processing of various workpieces at one time, greatly improves the processing efficiency compared with the existing processing equipment of a single workpiece, has uniform heating supply and quick unloading, ensures the quality and improves the productivity.

As shown in FIG. 6, in the present invention, three layers of said cavity 210 are, from inside to outside, a large cylindrical cavity 2101, a plurality of small cylindrical cavities 2102 and an annular cavity 2103, said small cylindrical cavities 2102 being circumferentially arranged around said large cylindrical cavity 2101; the three layers of convex modules 220 are sequentially a large cylindrical convex module 2201, a plurality of small cylindrical convex modules 2202 and an annular convex module 2203 from inside to outside, and the small cylindrical convex modules 2202 are distributed around the large cylindrical convex module 2201 in a circumferential array; the large cylindrical convex module 2201 corresponds to the large cylindrical female die cavity 2101, and the large cylindrical convex module and the large cylindrical female die cavity are matched to sinter and process metal powder in the female die cavity into a large cylindrical workpiece 100; the small cylindrical male die block 2202 corresponds to the small cylindrical female die cavity 2102, and the small cylindrical male die block and the small cylindrical female die cavity are matched to sinter and process metal powder in the die cavity into a small cylindrical workpiece 200; the annular male die block 2203 corresponds to the annular female die cavity 2103, and the two are matched to sinter and process metal powder in the die cavity into an annular workpiece 300. According to the invention, three common processing workpieces, namely the large cylindrical workpiece 100, the small cylindrical workpiece 200 and the annular workpiece 300, are preferably selected for metallurgical sintering, the quantity is controllable, the position layout is reasonable, and the processing quality of each workpiece is ensured.

As shown in fig. 3 and 6, the bottom of each cavity 210 is a detachable structure; the detachable bottom of the large cylindrical female die cavity 2101 is a large cylindrical detachable template 21010, the bottom part of the box body 11 right below the large cylindrical detachable template 21010 is a large cylindrical detachable box plate 112, the peripheral outline of the large cylindrical detachable box plate 112 is slightly larger than the outline of the large cylindrical detachable template 21010, the large cylindrical detachable template 21010 and the large cylindrical detachable box plate 112 are connected through a first connecting body 21011 integrally formed with the large cylindrical detachable template 21010, and the bottom of the large cylindrical detachable box plate 112 is connected with a vertical large cylindrical workpiece discharging electric push rod 6; the detachable bottom of the small cylindrical cavity 2102 is a small cylindrical detachable template 21020, the bottom of the box body 11 right below the small cylindrical detachable template 21020 is a small cylindrical detachable box plate 113, the peripheral profile of the small cylindrical detachable box plate 113 is slightly larger than that of the small cylindrical detachable template 21020, the small cylindrical detachable template 21020 and the small cylindrical detachable box plate 113 are connected through a second connector 21021 integrally formed with the small cylindrical detachable template 21020, and the bottom of the small cylindrical detachable box plate 113 is connected with a vertical small cylindrical workpiece unloading electric push rod 7; the detachable bottom of the annular cavity 2103 is an annular detachable template 21030, the bottom of the box body 11 right below the annular detachable template 21030 is an annular detachable box plate 114, the peripheral contour of the annular detachable box plate 114 is slightly smaller than that of the annular detachable template 21030, the annular detachable template 21030 is connected with the annular detachable box plate 114 through a third connector 21031 integrally formed with the annular detachable template 21030, and the bottom of the annular detachable box plate 114 is connected with a vertical annular workpiece unloading electric push rod 8; the device also comprises a horizontal pushing blanking mechanism 9 positioned on the side surface of the box body 11 and a conveying device 10 positioned below the box body 11; the two horizontal pushing blanking mechanisms 9 are the same in structure and are respectively distributed at the top and the bottom of the box body 11, the horizontal pushing blanking mechanism 9 at the top is used for pushing the annular workpiece 300 on the annular detachable template 21030 to fall onto the conveying device 10, and the horizontal pushing blanking mechanism 9 at the bottom is used for pushing the large cylindrical workpiece 100 on the large cylindrical detachable template 21010 and the small cylindrical workpiece 200 on the small cylindrical detachable template 21020 to fall onto the conveying device 10. The workpiece unloading is accurate and rapid, the subsequent processing of the workpiece is facilitated, and the efficiency is improved.

The end of each cavity 210 is chamfered to form an expanded structure, which facilitates the injection of metal powder.

The bottom of the box body 11 is provided with an outer supporting upright post 111; the bottom of the female die 21 is provided with an inner support upright post 211, the outer bottom of the female die 21 is supported by the support upright post 211 to form a bottom space with the inner bottom of the box body 11, and the outer side face of the female die 21 and the inner side wall of the box body 11 form a side space. More specifically, even through-hole 21.1 has been seted up to the lateral surface of die 21 and has constituted hollow out construction form, through-hole 21.1 switches on to being located outmost the cavity that spiral heating pipe 23 is located to make the internal environment of box 11 also keep the high temperature state, more be favorable to metallurgical sintering operation, improve quality.

A method for a powder metallurgy sintering device applied to multi-structural-piece synchronous processing comprises the following specific steps:

step S1: injecting metal powder into each concave die cavity 210, and then providing downward moving driving force by using the vertical cylinder 5 to enable the box cover 12 to move downward and extend into the box body 11 and keep the convex die block 220 not extending into the concave die cavity 210; opening a vacuum-pumping valve 11.2, firstly, slowly pumping out air in the box body 11 by using a vacuum-pumping device 11.4, then, opening an air inlet valve 12.3, slowly filling protective atmosphere into the box body 11 by using a protective atmosphere supply device 12.5, and keeping the filling speed of the protective atmosphere to be greater than the air pumping-out speed until the box body 11 and each concave cavity 210 are filled with the protective atmosphere;

step S2: the convex die block 220 continuously moves downwards to extend into the corresponding concave die cavity 210 and keeps a state of pressing down the metal powder, then, the vibrator 3 is started to drive the box cover 12 and the convex die block 220 to vertically vibrate together, so that the metal powder in the concave die cavity 210 is vibrated and compacted, and the vibrator 3 is closed after compaction;

step S3: the female die 21 is heated by the spiral heating pipe 23, and the male die 22 is heated by the heating block 24, so that the surrounding high-temperature sintering operation of the metal powder in each female die cavity 210 is realized by the matched heat transfer of the female die 21 and the male die 22, and the high-temperature heating is more sufficient and uniform; meanwhile, due to the arrangement of the through holes 21.1 on the side surface of the female die 21, the heat transfer is carried out by taking the protective atmosphere as a medium inside and outside the female die 21, so that the internal environment of the box body 11 is kept in a high-temperature state, the metallurgical sintering operation is facilitated, and the quality is improved;

the sintered workpiece in the large cylindrical female die cavity 2101 is a large cylindrical workpiece 100, the sintered workpiece in the small cylindrical female die cavity 2102 is a small cylindrical workpiece 200, and the sintered workpiece in the annular female die cavity 2103 is an annular workpiece 300, so that the metallurgical sintering of the three workpieces is completed at one time, and the processing efficiency is greatly improved;

step S4: after the sintering and forming of the workpiece are finished, opening an exhaust valve 12.6 for air release; then, the vertical cylinder 5 and the three electric push rods are started synchronously, and when the vertical cylinder 5 pushes down, the three electric push rods are shortened synchronously, so that the convex module 220 is utilized to push down and separate the workpiece adhered in the corresponding concave die cavity 210, and then the three electric push rods are stopped, and the vertical cylinder 5 drives the convex module 220 to move upwards and reset; next, the large cylindrical workpiece unloading electric push rod 6 and the small cylindrical workpiece unloading electric push rod 7 respectively support the large cylindrical workpiece 100 and the small cylindrical workpiece 200 to fall below the box body 11, the annular workpiece unloading electric push rod 8 pushes the annular workpiece 300 to move upwards to the upper surface of the box body 11, and then the large cylindrical workpiece 100, the small cylindrical workpiece 200 and the annular workpiece 300 are pushed together by the two horizontal pushing and unloading mechanisms 9 to fall onto the conveying device 10 for conveying.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (8)

1. The utility model provides a be applied to powder metallurgy sintering device of synchronous processing of multi-structure spare which characterized in that: comprises a processing box (1) and a multi-structure processing die (2); the processing box (1) comprises a box body (11) and a box cover (12), a vibrator (3) is arranged at the top of the box cover (12) and is connected with a vertical cylinder (5) through an elastic connecting piece (4), the box cover (12) can be driven by the vertical cylinder (5) to move downwards to stretch into the box body (11), and the box cover (12) is in sliding sealing fit with the box body (11); the multi-structure processing die (2) comprises a female die (21) arranged in a box body (11) and a male die (22) arranged at the bottom of a box cover (12), wherein three layers of female die cavities (210) are distributed in the female die (21) from inside to outside in a stacking mode, a plurality of spiral heating pipes (23) are embedded in the female die (21), the spiral heating pipes (23) are correspondingly sleeved outside each layer of female die cavity (20) one by one, and each layer of female die cavity (210) and the spiral heating pipes (23) are alternately arranged; three layers of convex mould blocks (220) are distributed on the convex mould (22) from inside to outside in a stacking mode, each layer of convex mould blocks (220) correspond to the concave mould cavities (210) of the corresponding vertical layer, and a heating block (24) is embedded in each layer of convex mould blocks (220).

2. The powder metallurgy sintering device applied to multi-structural-piece synchronous processing is characterized in that: the three layers of female die cavities (210) are sequentially provided with a large cylindrical female die cavity (2101), a plurality of small cylindrical female die cavities (2102) and an annular female die cavity (2103) from inside to outside, and the small cylindrical female die cavities (2102) are distributed around the large cylindrical female die cavity (2101) in a circumferential array; the three layers of convex modules (220) are sequentially provided with a large cylindrical convex module (2201), a plurality of small cylindrical convex modules (2202) and an annular convex module (2203) from inside to outside, and the small cylindrical convex modules (2202) are distributed around the large cylindrical convex module (2201) in a circumferential array; wherein the content of the first and second substances,

the large cylindrical convex module (2201) corresponds to the large cylindrical concave die cavity (2101), and the large cylindrical convex module and the large cylindrical concave die cavity are matched to sinter and process metal powder in the die cavity into a large cylindrical workpiece (100);

the small cylindrical male die block (2202) corresponds to the small cylindrical female die cavity (2102), and the small cylindrical male die block and the small cylindrical female die cavity are matched to sinter and process metal powder in the die cavity into a small cylindrical workpiece (200);

the annular convex die block (2203) corresponds to the annular concave die cavity (2103), and the annular convex die block and the annular concave die cavity are matched to sinter and process metal powder in the die cavity into an annular workpiece (300) in a metallurgical manner.

3. The powder metallurgy sintering device applied to multi-structural-piece synchronous processing is characterized in that: the bottom of each concave die cavity (210) is of a detachable structure; wherein the content of the first and second substances,

the detachable bottom of the large cylindrical female die cavity (2101) is a large cylindrical detachable template (21010), the bottom part of the box body (11) right below the large cylindrical detachable template (21010) is a large cylindrical detachable box plate (112), the peripheral outline of the large cylindrical detachable box plate (112) is slightly larger than the outline of the large cylindrical detachable template (21010), the large cylindrical detachable template (21010) and the large cylindrical detachable box plate (112) are connected through a first connecting body (21011) integrally formed with the large cylindrical detachable template (21010), and the bottom of the large cylindrical detachable box plate (112) is connected with a vertical large cylindrical workpiece unloading electric push rod (6);

the detachable bottom of the small cylindrical concave die cavity (2102) is a small cylindrical detachable template (21020), the bottom part of the box body (11) right below the small cylindrical detachable template (21020) is a small cylindrical detachable box plate (113), the peripheral profile of the small cylindrical detachable box plate (113) is slightly larger than that of the small cylindrical detachable template (21020), the small cylindrical detachable template (21020) and the small cylindrical detachable box plate (113) are connected through a second connector (21021) integrally formed with the small cylindrical detachable template (21020), and the bottom of the small cylindrical detachable box plate (113) is connected with a vertical small cylindrical workpiece unloading electric push rod (7);

the detachable bottom of the annular concave die cavity (2103) is an annular detachable template (21030), the bottom part of the box body (11) right below the annular detachable template (21030) is an annular detachable box plate (114), the peripheral profile of the annular detachable box plate (114) is slightly smaller than that of the annular detachable template (21030), the annular detachable template (21030) is connected with the annular detachable box plate (114) through a third connector (21031) integrally formed with the annular detachable template (21030), and the bottom of the annular detachable box plate (114) is connected with a vertical annular workpiece unloading electric push rod (8);

the device also comprises a horizontal pushing blanking mechanism (9) positioned on the side surface of the box body (11) and a conveying device (10) positioned below the box body (11); the horizontal pushing blanking mechanism (9) is two with the same structure and is respectively distributed at the top and the bottom of the box body (11), the horizontal pushing blanking mechanism (9) at the top is used for pushing an annular workpiece (300) on an annular detachable template (21030) down to the conveying device (10), and the horizontal pushing blanking mechanism (9) at the bottom is used for pushing a large cylindrical workpiece (100) on a large cylindrical detachable template (21010) and a small cylindrical workpiece (200) on a small cylindrical detachable template (21020) down to the conveying device (10).

4. A powder metallurgy sintering device for multi-structural-piece simultaneous processing according to claim 1, 2 or 3, wherein: the port of each concave die cavity (210) is processed by chamfering to form an expanded structure.

5. The powder metallurgy sintering device applied to multi-structural-piece synchronous processing according to claim 3, is characterized in that: a vacuumizing port (11.1) is formed in the side face of the box body (11), a vacuumizing valve (11.2) is butted to the vacuumizing port (11.1), and the vacuumizing valve (11.2) is connected with vacuumizing equipment (11.4) through a vacuumizing pipeline (11.3); the top of case lid (12) has air inlet (12.1) and gas vent (12.2), air inlet (12.1) is to having admission valve (12.3), admission valve (12.3) are through admission pipeline (12.4) connection protective atmosphere supply equipment (12.5), gas vent (12.2) are to having discharge valve (12.6).

6. The powder metallurgy sintering device applied to multi-structural-piece synchronous processing is characterized in that: the bottom of the box body (11) is provided with an outer supporting upright post (111); the utility model discloses a refrigerator box, including die (21), support stand (211) in die (21) bottom is provided with, the outer bottom of die (21) is supported through support stand (211) and is had the bottom interval with the interior bottom of box (11), the lateral surface of die (21) has the lateral part interval with the inside wall of box (11).

7. The powder metallurgy sintering device applied to multi-structural-piece synchronous processing is characterized in that: even through-hole (21.1) are seted up to the lateral surface of die (21) and constitute hollow out construction form, through-hole (21.1) switch on to be located outermost the cavity that spiral heating pipe (23) were located.

8. The method of claim 7, wherein the sintering device comprises a sintering chamber, and a sintering chamber, wherein the sintering chamber comprises: the method comprises the following specific steps:

step S1: injecting metal powder into each concave die cavity (210), then utilizing a vertical cylinder (5) to provide downward moving driving force to enable a box cover (12) to move downward to extend into a box body (11), and keeping a convex die block (220) not to extend into the concave die cavity (210); opening a vacuum-pumping valve (11.2), firstly, slowly pumping out air in the box body (11) by using a vacuum-pumping device (11.4), then, opening an air inlet valve (12.3), slowly filling protective atmosphere into the box body (11) by using a protective atmosphere supply device (12.5), and keeping the filling speed of the protective atmosphere to be greater than the air pumping-out speed until the box body (11) and each concave die cavity (210) are filled with the protective atmosphere;

step S2: the male die block (220) continuously moves downwards to extend into the corresponding female die cavity (210) and keeps a state of pressing down the metal powder, then, the vibrator (3) is started to drive the box cover (12) and the male die block (220) to vertically vibrate together, so that the metal powder in the female die cavity (210) is vibrated and compacted, and the vibrator (3) is closed after compaction;

step S3: the female die (21) is heated by a spiral heating pipe (23), the male die (22) is heated by a heating block (24), and therefore the metal powder in each female die cavity (210) is surrounded by high-temperature sintering operation by means of matching heat transfer of the female die (21) and the male die (22), and high-temperature heating is more sufficient and uniform; meanwhile, due to the arrangement of the through holes (21.1) on the side surface of the female die (21), the heat transfer is carried out by taking the protective atmosphere inside and outside the female die (21) as a medium, so that the internal environment of the box body (11) is kept in a high-temperature state, the metallurgical sintering operation is facilitated, and the quality is improved;

the sintering workpiece in the large cylindrical concave die cavity (2101) is a large cylindrical workpiece (100), the sintering workpiece in the small cylindrical concave die cavity (2102) is a small cylindrical workpiece (200), and the sintering workpiece in the annular concave die cavity (2103) is an annular workpiece (300), so that the three workpieces are sintered in one step, and the processing efficiency is greatly improved;

step S4: after the sintering and forming of the workpiece are finished, opening an exhaust valve (12.6) for air release; then, the vertical cylinder (5) and the three electric push rods are started synchronously, the three electric push rods are shortened synchronously while the vertical cylinder (5) pushes down, so that the workpieces bonded in the corresponding cavity (210) are pushed down to be separated movably by the aid of the convex module (220), then the three electric push rods are stopped, and the vertical cylinder (5) drives the convex module (220) to move upwards for resetting; then, a large cylindrical workpiece unloading electric push rod (6) and a small cylindrical workpiece unloading electric push rod (7) respectively support the large cylindrical workpiece (100) and the small cylindrical workpiece (200) to descend below the box body (11), an annular workpiece unloading electric push rod (8) pushes the annular workpiece (300) to move upwards to the upper surface of the box body (11), and then the large cylindrical workpiece (100), the small cylindrical workpiece (200) and the annular workpiece (300) are pushed and dropped onto a conveying device (10) together by utilizing two horizontal pushing and unloading mechanisms (9) to be conveyed.

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