CN213317668U

CN213317668U - Vibrating charging device for powder metallurgy isostatic compaction

Info

Publication number: CN213317668U
Application number: CN202021697429.8U
Authority: CN
Inventors: 何浩然; 刘奇; 薄新维; 王小宇; 刘成超; 王焱辉; 姚志远; 韩校宇
Original assignee: Chongqing Materials Research Institute Co Ltd
Current assignee: Chongqing Materials Research Institute Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-06-01
Anticipated expiration: 2030-08-14

Abstract

The utility model relates to a vibrating charging device for powder metallurgy isostatic compaction, which comprises two vibrating motors, the upper ends of the two vibrating motors are connected with and support a vibrating plate through springs, a positioning plate is fixed at the upper end of the vibrating plate, a plurality of charging moulds are arranged on the positioning plate, each charging mould comprises a core rod and a rubber mould, a straightening sleeve is sleeved outside the rubber mould, the core rod is positioned in the rubber mould, the lower end of the core rod is inserted into a positioning hole of the positioning plate, the lower end of the core rod is fixed with the lower end of the rubber mould through a hoop, the upper end of the rubber mould is connected with a centering piece, the upper end of the core rod passes through a centering hole arranged on the centering piece to form positioning, two upright posts are fixed on the positioning plate, a mould fixing plate and a funnel fixing plate are fixed between the two upright posts, each charging mould respectively passes through the positioning hole of the mould, the discharge port at the lower end of each funnel is correspondingly inserted into the upper end of the charging mold respectively.

Description

Vibrating charging device for powder metallurgy isostatic compaction

Technical Field

The utility model relates to an isostatic compaction field, in particular to a vibration charging devices for powder metallurgy isostatic compaction.

Background

Powder metallurgy isostatic compaction is a forming method which utilizes incompressibility and uniform pressure transmission of a liquid medium, and a formed blank is uniform in stress, uniform in density distribution and good in product performance. The isostatic compaction comprises the processes of loading, pressurizing, pressure maintaining, pressure relief and the like, wherein the loading is the process of loading powder into a mold, and the powder is uniformly loaded in the mold through mechanical compaction during loading. At present, mechanical compaction materials comprise cam type and pneumatic type compaction, wherein the cam type drives a cam to rotate by utilizing a motor through belt transmission and gear transmission, and the lifting and free falling of a mold are realized by pushing a base for fixing the mold through the cam; the pneumatic type is that the piston rod of the cylinder pushes the base of the fixed die to realize the lifting and free falling of the die by utilizing the inflation and deflation of the cylinder. Cam and cylinder all have great impact force to the base, and the density that can appear lower part powder in the mould when realizing the mould up-and-down motion through the impact is big, and powder density is gradient distribution along the vertical vibration direction, and powder density distributes inhomogeneously, and the size distribution that leads to the shaping back pressed compact is irregular from this, the straightness is relatively poor, and the uniformity of pressed compact is also poor, is unfavorable for mass production.

Disclosure of Invention

The utility model aims at prior art not enough, provide a vibration charging devices for powder metallurgy isostatic compaction, it can realize the synchronous plain bumper of feeding mold level and vertical direction through vertical vibrating motor, horizontal vibrating motor, and vibrating motor is even, steady to the plain bumper of powder, and the powder density distribution in the mould is even, and the uniformity of pressed compact is good.

The technical scheme of the utility model is that: a vibration charging device for powder metallurgy isostatic compaction comprises two vibration motors, wherein one vibration motor is a vertical vibration motor, the other vibration motor is a horizontal vibration motor, the upper ends of the two vibration motors are connected and supported with a vibration plate through springs, a positioning plate is fixed at the upper end of the vibration plate, a plurality of charging dies are installed on the positioning plate, each charging die comprises a core rod and a rubber die, a straightening sleeve is sleeved outside the rubber die, the core rod is positioned in the rubber die, the lower end of the core rod is inserted into a positioning hole formed in the positioning plate, the lower end of the core rod and the lower end of the rubber die are fixed through a hoop to form a charging blind hole in the rubber die, the upper end of the rubber die is connected with a centering piece, the upper end of the core rod penetrates through a centering hole formed in the centering piece to be positioned, the centering piece is provided with a plurality of leakage holes for powder to penetrate through to fall, from supreme fixed die fixing plate, the funnel fixed plate in proper order down between two stands, it is fixed that each mould of feeding passes the locating hole that the fixed die fixing plate set up respectively and forms, be fixed with a plurality of funnels on the funnel fixed plate, the upper end of each funnel cooperates respectively in the mounting hole that the funnel fixed plate set up, and the lower extreme discharge gate of each funnel corresponds the upper end that inserts the mould of feeding respectively and is arranged in to the rubber mold feed.

The centering piece is an inwards concave pipe cap, the upper end of the pipe cap is buckled at the upper end of the rubber mold, the inwards concave part extending downwards of the pipe cap is in a U-shaped mode and is located in a charging blind hole of the rubber mold, the center of the circle of the bottom of the U-shaped inwards concave part is provided with a centering hole for positioning a core rod, and the bottom of the U-shaped inwards concave part is provided with a plurality of leakage holes for powder to fall.

The upper end of pipe cap is fixed in rubber mold upper end through some pressing sleeves of pipe cap overcoat, pressing sleeve axle center sets up the through-hole of stepping down, the lower extreme discharge gate of funnel passes the through-hole of stepping down that presses the cover and inserts in the indent of pipe cap.

The two vibration motors are staggered front and back and are respectively positioned below two opposite corners of the vibration plate, and the springs at the upper ends of the two vibration motor shells are symmetrically supported on the opposite corners of the vibration plate.

The spring is an air spring.

The two stand columns respectively penetrate through via holes formed in the die fixing plate and the funnel fixing plate and fix the die fixing plate and the funnel fixing plate through the limiting clamp.

The lower end of the core rod is provided with a flange, the hoop hoops the lower end of the rubber mold to fix the rubber mold on the flange of the core rod, the lower end of the flange is provided with an axially extending positioning section, and the positioning section is inserted into a positioning hole of the positioning plate.

Adopt above-mentioned technical scheme: the feeding device comprises two vibrating motors, wherein one vibrating motor is a vertical vibrating motor, the other vibrating motor is a horizontal vibrating motor, the upper ends of the two vibrating motors are connected with and support a vibrating plate through springs, a positioning plate is fixed at the upper end of the vibrating plate, a plurality of feeding molds are installed on the positioning plate, each feeding mold comprises a core rod and a rubber mold, a straightening sleeve is sleeved outside the rubber mold, the core rod is positioned in the rubber mold, the lower end of the core rod is inserted into a positioning hole formed in the positioning plate, the lower end of the core rod and the lower end of the rubber mold are fixed through a hoop to form a feeding blind hole in the rubber mold, the upper end of the rubber mold is connected with a centering piece, the upper end of the core rod penetrates through a centering hole formed in the centering piece to be positioned, the centering piece is provided with a plurality of leakage holes for powder to penetrate through to fall, two vertical upwards, The funnel fixed plate, each mould of feeding pass the locating hole that the mould fixed plate set up respectively and form fixedly, be fixed with a plurality of funnels on the funnel fixed plate, the upper end of each funnel cooperates respectively in the mounting hole that the funnel fixed plate set up, and the lower extreme discharge gate of each funnel corresponds the upper end that inserts the mould of feeding respectively and is arranged in to the rubber mold feed. The vertical vibrating motor of this device, horizontal vibrating motor can make the device realize the vibration of level and vertical direction simultaneously, two vibrating motors can transmit even vibration to the vibration board through the spring, the mould of feeding of fixing on the locating plate in the in-process of feeding can vibrate with the vibration board is even together, the synchronous plain bumper of mould level and vertical direction of feeding is realized, make the powder that gets into in the rubber mold blind hole of feeding obtain even plain bumper in all directions, do not have any impact, powder density distribution in the mould is even. The powder in the charging die of the device is more beneficial to controlling the size and the flatness of a pressed compact, can improve the consistency and the stability of a product, and is beneficial to batch production. Moreover, the device has stable structure, the funnel fixing plate, the mold fixing plate and the positioning plate are well fixed to the upper part, the middle part and the lower part of the charging mold, stable transmission of vibration is guaranteed, and the effect of uniform compaction of powder is increased. In addition, the device is wide in application range, the die fixing plate and the funnel fixing plate can be adjusted up and down on the stand column according to charging dies of different sizes, and production cost is reduced.

The centering piece is an inwards concave pipe cap, the upper end of the pipe cap is buckled at the upper end of the rubber mold, the inwards concave part extending downwards of the pipe cap is in a U-shaped mode and is located in a charging blind hole of the rubber mold, the center of the circle of the bottom of the U-shaped inwards concave part is provided with a centering hole for positioning a core rod, and the bottom of the U-shaped inwards concave part is provided with a plurality of leakage holes for powder to fall. The U-shaped inner concave part extends towards the charging blind hole of the rubber mold so as to facilitate centering of the centering piece on the core rod, the upper end of the core rod is matched in the centering hole of the centering piece, the core rod can be ensured to be positioned at the axis of the rubber mold, the position precision of the core rod is ensured, and the arranged leakage hole can ensure that powder normally falls into the charging blind hole of the rubber mold. The upper end of pipe cap is fixed in rubber mold upper end through some pressing sleeves of pipe cap overcoat, pressing sleeve axle center sets up the through-hole of stepping down, the lower extreme discharge gate of funnel passes the through-hole of stepping down that presses the cover and inserts in the indent of pipe cap. The pressing sleeve is used for fixing the centering piece, and the stability of connection between the centering piece and the rubber mold can be guaranteed. The set abdicating through hole can be used for inserting the funnel, so that powder in the funnel can fall into the rubber mold from the discharge hole.

The two vibration motors are staggered front and back and are respectively positioned below two opposite corners of the vibration plate, and the springs at the upper ends of the two vibration motor shells are symmetrically supported on the opposite corners of the vibration plate. Two vibrating motors that misplace from beginning to end not only are better to the vibration of vibrating plate, and the spring of two vibrating motor upper ends is also better to the support of vibrating plate, has increased the steady and the homogeneity of vibrating plate vibration.

The spring is an air spring which is made of the compressibility of air in the closed container, not only can the support of the vibrating plate be good and the vibrating plate can adapt to different load requirements, but also stable flexible transmission can be realized, and the vibration is more stable.

The two stand columns respectively penetrate through via holes formed in the die fixing plate and the funnel fixing plate and fix the die fixing plate and the funnel fixing plate through the limiting clamp. The limiting clamp is good in limiting of the two fixing plates, the installation of the limiting clamp is simple and rapid, the limiting clamp is convenient for up-and-down sliding adjustment of the mold fixing plate and the funnel fixing plate on the stand column, and convenience is brought to use of the device.

The lower end of the core rod is provided with a flange, the hoop hoops the lower end of the rubber mold to fix the rubber mold on the flange of the core rod, the lower end of the flange is provided with an axially extending positioning section, and the positioning section is inserted into a positioning hole of the positioning plate. The diameter of the flange at the lower end of the core rod is matched with that of the charging blind hole of the rubber mold, the flange facilitates connection between the lower end of the rubber mold and the lower end of the core rod, the positioning section at the lower end of the flange is easy to process, and the charging device is convenient to fix on the positioning plate.

The vibrating charging device for powder metallurgy isostatic compaction is stable in structure, the powder can be uniformly compacted in all directions through the two vibrating motors, no impact is caused, and the density distribution of the powder in the die is uniform. The powder in the charging die of the device is more beneficial to controlling the size and the flatness of a pressed compact, can improve the consistency and the stability of a product, and is beneficial to batch production. And the vibration transmission of this device is steady, and its application scope is also wide, uses portably, and mould fixed plate, funnel fixed plate can be adjusted from top to bottom at the stand according to the mould of feeding of different sizes, have reduced manufacturing cost.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the centering member;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic diagram of two vibration motors arranged in a staggered manner in front and back;

FIG. 5 is a schematic view of the mandrel flange engaging the lower end of the rubber mold;

fig. 6 is a schematic view of the charging mold after charging is completed.

Detailed Description

Referring to fig. 1 to 6, a vibration charging device for powder metallurgy isostatic compaction comprises two vibration motors 1, wherein one vibration motor is a vertical vibration motor, the other vibration motor is a horizontal vibration motor, and the upper ends of the two vibration motors 1 are connected and supported with a vibration plate 3 through springs 2. The two vibration motors 1 are staggered front and back and are respectively positioned below two opposite angles of the vibration plate 3, and the springs 2 at the upper ends of the two vibration motors 1 are symmetrically supported on the opposite angles of the vibration plate 3. The vertical vibration motor and the horizontal vibration motor which are staggered from front to back not only can better vibrate the vibration plate 3, but also the springs 2 at the upper ends of the two vibration motors 1 can better support the vibration plate 3, so that the stability and the uniformity of the vibration plate 3 are improved. The spring 2 is an air spring which is made of the compressibility of air in a closed container, the vibration plate 3 is well supported, different load requirements can be met, stable flexible transmission can be achieved, and vibration is more stable. The upper end of the vibrating plate 3 is fixed with a positioning plate 4 through bolts, a plurality of charging molds are mounted on the positioning plate 4, each charging mold comprises a core rod 5 and a rubber mold 6, the core rod 5 is made of steel, a straightening sleeve 7 is sleeved outside the rubber mold 6, the core rod 5 is located in the rubber mold 6, and the lower end of the core rod 5 and the lower end of the rubber mold 6 are fixed through a hoop 16 to enable a charging blind hole 6-1 to be formed in the rubber mold 6. The lower end of the core rod 5 is provided with a flange 5-2, the hoop 16 is hooped at the lower end of the rubber mold 6 to fix the rubber mold 6 on the flange 5-2 of the core rod 5, the lower end of the flange 5-2 is provided with an axially extending positioning section 5-1, and the positioning section 5-1 is inserted into a positioning hole of the positioning plate 4. The diameter of the flange 5-2 at the lower end of the core rod 5 is matched with the diameter of the charging blind hole 6-1 of the rubber mold 6, the flange 5-2 facilitates the connection between the lower end of the rubber mold 6 and the lower end of the core rod 5, and the positioning section 5-1 at the lower end of the flange 5-2 is simple to process and facilitates the fixation of the charging device on the positioning plate 4. The upper end of the rubber die 6 is connected with a pair of centering pieces 13, and the upper end of the core rod 5 is positioned through a centering hole 13-2 arranged on the centering pieces 13. The centering piece 13 is an inwards concave pipe cap, the brim at the upper end of the pipe cap is buckled at the upper end of the rubber mold 6, an inwards concave part 13-1 extending downwards of the pipe cap is U-shaped and is positioned in the blind charging hole 6-1 of the rubber mold 6, and the diameter of the outer circumference of the inwards concave part 13-1 is matched with the diameter of the blind charging hole 6-1. The center of the bottom of the U-shaped concave part 13-1 is provided with a centering hole 13-2 for positioning the core rod 5, and the bottom of the U-shaped concave part 13-1 is provided with a plurality of leakage holes 13-3 for powder 14 to fall. The U-shaped inner concave part 13-1 extends into the charging blind hole 6-1 of the rubber mold so as to facilitate the centering of the centering piece 13 on the core rod 5, the upper end of the core rod 5 is matched in the centering hole 13-2 of the centering piece 13, the core rod 5 can be ensured to be positioned at the axis of the rubber mold 6, the position precision of the core rod 5 is ensured, and the arranged leakage hole 13-3 can ensure that the powder 14 can normally fall into the charging blind hole 6-1 of the rubber mold 6. The upper end of the pipe cap is fixed at the upper end of the rubber mold 6 through a pressing sleeve 11 sleeved outside the cap edge, an abdicating through hole is formed in the axis of the pressing sleeve 11, and a lower end discharge port of the funnel 12 penetrates through the abdicating through hole of the pressing sleeve 11 and is inserted into an inner concave part 13-1 of the pipe cap. The pressing sleeve 11 is used for fixing the centering piece 13, and can ensure the stability of connection between the centering piece 13 and the rubber mold 6. The relief through-hole is provided for the hopper 12 to be inserted so that the powder 14 in the hopper 12 can fall from the discharge opening into the rubber mold 6. Two upright posts 9 extending vertically upwards are fixed on the positioning plate 4, a mold fixing plate 8 and a funnel fixing plate 10 are sequentially fixed between the two upright posts 9 from bottom to top, and the mold fixing plate 8, the funnel fixing plate 10 and the positioning plate 4 are made of plastics. The through hole that supplies stand 9 to pass that all sets up on mould fixed plate 8, the funnel fixed plate 10, two stands 9 are respectively through spacing clamp 15 axial fixity mould fixed plate 8, funnel fixed plate 10. The limiting clamp 15 is good in limiting of the two fixing plates, the installation is simple and rapid, the limiting clamp 15 further facilitates up-and-down sliding adjustment of the mold fixing plate 8 and the funnel fixing plate 10 on the stand column 9, and convenience is brought to use of the device. Each charging mold penetrates through a positioning hole formed in the mold fixing plate 8 to be fixed, a plurality of funnels 12 are fixed on the funnel fixing plate 10, upper end feed ports of the funnels 12 are matched in mounting holes formed in the funnel fixing plate 10 respectively, and lower end discharge ports of the funnels 12 are inserted into upper ends of the charging molds correspondingly respectively and used for feeding materials into the rubber molds 6.

The vertical vibrating motor and the horizontal vibrating motor of the device can enable the device to simultaneously realize the vibration in the horizontal direction and the vertical direction, two vibrating motors 1 can transmit the uniform vibration to the vibrating plate 3 through the air springs, the charging mold fixed on the positioning plate 4 can uniformly vibrate together with the vibrating plate 3 in the charging process, the horizontal and vertical synchronous compaction of the charging mold is realized, the powder 14 entering the rubber mold charging blind hole 6-1 is uniformly compacted in all directions, no impact is caused, and the density distribution of the powder 14 in the mold is uniform. After the powder 14 is filled into 2/3 of the blind loading hole 6-1 of the rubber mold 6, the powder 14 positions the core rod 5, so that the core rod 5 does not need to be limited by the centering piece 13. At the moment, the two vibrating motors 1 are closed, the funnel fixing plate 10 and the funnel 12 are taken down firstly, then the pressing sleeves 11 on the charging molds are taken down, finally the centering piece 13 is taken down, and the funnel 12 and the funnel fixing plate 10 are installed, so that the lower end of the funnel 12 is directly inserted into the charging blind hole 6-1 of the rubber mold 6. The vibrating motor 1 is started to continue charging, the funnel fixing plate 10 and the funnel 12 are taken down after charging, the charging blind hole 6-1 of the rubber mold 6 is blocked by the plug 17 at the upper end of each charging mold, and the plug 17 is hooped by the hoop to finish charging, so that the obtained powder has good size. The mould after the completion of feeding is put into isostatic pressing equipment and is used for compression moulding, and powder 14 in the mould of this device feeding more is favorable to the control of pressed compact size and straightness, can improve uniformity, the stability of product, is favorable to batch production. Moreover, the device has stable structure, the funnel fixing plate 10, the die fixing plate 8 and the positioning plate 4 are well fixed on the upper part, the middle part and the lower part of the charging die, stable transmission of vibration is guaranteed, and the effect of uniform compaction of the powder 14 is increased. In addition, the device has wide application range, the die fixing plate 8 and the funnel fixing plate 10 can be adjusted up and down on the upright post 9 according to charging dies with different sizes, and the production cost is reduced.

Claims

1. A vibrating charging device for powder metallurgy isostatic compaction is characterized in that: the device comprises two vibrating motors (1), wherein one vibrating motor is a vertical vibrating motor, the other vibrating motor is a horizontal vibrating motor, the upper ends of the two vibrating motors (1) are connected and supported with a vibrating plate (3) through springs (2), a positioning plate (4) is fixed at the upper end of the vibrating plate (3), a plurality of charging molds are installed on the positioning plate (4), each charging mold comprises a core rod (5) and a rubber mold (6), a straightening sleeve (7) is sleeved outside the rubber mold (6), the core rod (5) is positioned in the rubber mold (6), the lower end of the core rod (5) is inserted into the positioning hole formed in the positioning plate (4), the lower end of the core rod (5) and the lower end of the rubber mold (6) are fixed through a hoop (16) to form a charging blind hole (6-1) in the rubber mold (6), and the upper end of the rubber mold (6) is connected with a, the upper end of plug (5) passes centering hole (13-2) that centering piece (13) set up and forms the location, centering piece (13) are equipped with a plurality of confession powder and pass weeping holes (13-3) of whereabouts, be fixed with two vertical upwards extending stand (9) on locating plate (4), from supreme fixed die fixing plate (8), funnel fixed plate (10) in proper order down between two stand (9), and the location hole that each mould of feeding passed mould fixed plate (8) respectively sets up forms fixedly, be fixed with a plurality of funnels (12) on funnel fixed plate (10), the upper end of each funnel (12) cooperates respectively in the mounting hole that funnel fixed plate (10) set up, and the lower extreme discharge gate of each funnel (12) corresponds the upper end that inserts the mould of feeding respectively and is arranged in to rubber mold (6).

2. The vibrating charging device for powder metallurgy isostatic pressing according to claim 1, wherein: the centering piece (13) is an inwards concave pipe cap, the upper end of the pipe cap is buckled at the upper end of the rubber mold (6), an inwards concave part (13-1) extending downwards of the pipe cap is U-shaped and is positioned in a charging blind hole (6-1) of the rubber mold (6), the center of the circle at the bottom of the U-shaped inwards concave part (13-1) is provided with a centering hole (13-2) for positioning the core rod (5), and the bottom of the U-shaped inwards concave part (13-1) is provided with a plurality of leakage holes (13-3) for powder to fall.

3. The vibrating charging device for powder metallurgy isostatic pressing according to claim 2, wherein: the upper end of pipe cap is fixed in rubber mold (6) upper end through some pressing sleeve (11) of pipe cap overcoat, pressing sleeve (11) axle center and setting up the through-hole of stepping down, the lower extreme discharge gate of funnel (12) passes the through-hole of stepping down that presses sleeve (11) and inserts in interior concave part (13-1) of pipe cap.

4. The vibrating charging device for powder metallurgy isostatic pressing according to claim 1, wherein: the two vibrating motors (1) are staggered front and back and are respectively positioned below two opposite angles of the vibrating plate (3), and the springs (2) at the upper ends of the shells of the two vibrating motors (1) are symmetrically supported on the opposite angles of the vibrating plate (3).

5. The vibrating charging device for powder metallurgy isostatic pressing according to claim 1, wherein: the spring (2) is an air spring.

6. The vibrating charging device for powder metallurgy isostatic pressing according to claim 1, wherein: two columns (9) respectively pass through the through holes arranged on the die fixing plate (8) and the funnel fixing plate (10) and fix the die fixing plate (8) and the funnel fixing plate (10) through the limiting clamp (15).

7. The vibrating charging device for powder metallurgy isostatic pressing according to claim 1, wherein: the lower end of the core rod (5) is provided with a flange (5-2), the hoop (16) hoops the lower end of the rubber mold (6) to fix the rubber mold (6) on the flange (5-2) of the core rod (5), the lower end of the flange (5-2) is provided with an axially extending positioning section (5-1), and the positioning section (5-1) is inserted into a positioning hole of the positioning plate (4).