A powder cold pressing device and method for hard alloy processing

Abstract

The invention relates to the technical field of powder cold pressing, and discloses a powder cold pressing device and method for cemented carbide processing, which solves the problem that metal powder is easily scattered on the outer surface of an operating table and a lower mold during the process of adding metal powder into the cavity of a lower mold, and the problem that the accuracy of adding metal powder is high. The invention comprises an operating table, a base is provided below the operating table, the base and the operating table are connected by supporting legs, a feeding trough is provided on the operating table, a feeding hole is provided on the inner wall of the feeding trough, a feeding pipe matched with the feeding hole is fixedly connected to the operating table, a first through hole is provided on the bottom inner wall of the feeding trough, and a lifting sleeve is provided above the base; the metal powder is prevented from being scattered on various positions on the operating table, which is convenient for later use, and at the same time ensures that a sufficient amount of metal powder is added to the cavity of the lower mold, and the metal powder overflowing from the cavity of the lower mold is scraped off, thereby improving the accuracy of adding metal powder.

Description

Technical Field

[0001] The invention belongs to the technical field of powder cold pressing, and in particular relates to a powder cold pressing device and method for hard alloy processing. Background Art

[0002] With the rapid development of petrochemical, mining, smelting, mechanical processing and transportation, the demand for high modulus, high strength, high hardness, wear resistance and corrosion resistance materials is becoming more and more urgent. The cold pressing device can press the loose powder composed of particles into a blank with a certain shape, size, strength and density under a certain pressure and instrument at room temperature. It is generally widely used in powder metallurgy, ceramic industry and tablet production. In the processing of existing cemented carbide, metal powder is placed in the cavity of the lower mold, and then the metal powder in the lower mold is pressed by the pressing molding mechanism to finally obtain a cold-pressed molded part. In the process of adding metal powder to the cavity of the lower mold, the metal powder is easy to spill on the outer surface of the operating table and the lower mold, and the staff needs to clean it regularly in the later stage. In addition, when more metal powder is added, the density and weight of the molded part will increase, and when less metal powder is added, the density and weight of the molded part will decrease, and the accuracy of adding metal powder is required to be high. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a powder cold pressing device and method for cemented carbide processing, which effectively solves the problem that in the process of adding metal powder into the cavity of the lower mold in the above background technology, the metal powder is easily spilled on the outer surface of the operating table and the lower mold, and the high precision requirement for adding metal powder.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a powder cold pressing device for cemented carbide processing, comprising an operating table, a base is provided below the operating table, the base and the operating table are connected by supporting legs, a feeding trough is provided on the operating table, a feeding hole is provided on the inner wall of the feeding trough, a feeding pipe matching with the feeding hole is fixedly connected to the operating table, a first through hole is provided on the bottom inner wall of the feeding trough, a lifting sleeve is provided above the base, the top of the lifting sleeve passes through the first through hole, and the lifting sleeve and the base are connected by a lifting member, a lower mold is provided in the lifting sleeve, a partition is provided below the lower mold, the partition and the inner wall of the lifting sleeve are fixedly connected, a mounting plate is provided on the top of the partition, the mounting plate and the lower mold are connected by a locking positioning member, an ejection unit matching with the lower mold is provided on the mounting plate, a movable ring is provided below the partition, and a movable ring is provided below the partition. The movable ring and the mounting plate are fixedly connected by at least two connecting columns, and the connecting column passes through the partition, and the outer sleeve of the connecting column is provided with a first spring, and the two ends of the first spring are respectively abutted against the movable ring and the partition, a double-sided rack is provided in the lifting sleeve, and the bottom end of the double-sided rack is fixedly connected to the base, and the outer sleeve of the double-sided rack is provided with a movable seat, and the movable seat and the lifting sleeve are connected by a sliding unit, and two impact plates are provided above the movable seat, and the impact plate and the movable seat are connected by an elastic member, and a shaking impactor matching the movable seat is provided on the lifting sleeve, and a stopping structure matching the impact plate is provided on the double-sided rack, and the top of the impact plate contacts with the bottom of the movable ring, and a scraper is provided on the top of the lifting sleeve, and a pressing plate is fixedly connected to one of the impact plates, and the scraper and the pressing plate are connected by a pressing reciprocating toggle assembly, and a pressing molding mechanism is provided on the operating table.

[0005] Preferably, the pressing and reciprocating toggle assembly includes a first support plate arranged at the bottom of the pressing plate, at least two guide columns are fixedly connected to the first support plate, the outer sleeve of the guide column is provided with a first fixing plate and a second spring, the first fixing plate and the inner wall of the lifting sleeve are fixedly connected, the two ends of the second spring are respectively fixedly connected to the first support plate and the first fixing plate, the first support plate is fixedly connected with a first bracket, a single-sided rack is fixedly connected to the first bracket, a first rotating shaft is provided on one side of the single-sided rack, a second bracket is provided on the outer sleeve of the first rotating shaft, a bearing is provided at the connection between the first rotating shaft and the second bracket, the second bracket is fixedly connected to the inner wall of the lifting sleeve, one end of the first rotating shaft is fixedly connected with a first gear meshing with the single-sided rack, and the other end of the first rotating shaft is connected to the scraper through a meshing member.

[0006] Preferably, the engaging member includes a first bevel gear fixedly mounted on the first rotating shaft, a first groove is formed on the inner wall of the lifting sleeve, and the first bevel gear is located in the first groove, a second bevel gear meshing with the first bevel gear is formed in the first groove, a second rotating shaft is fixedly connected to the second bevel gear, the top end of the second rotating shaft is fixedly connected to the scraper, and a bearing is provided at the connection between the second rotating shaft and the lifting sleeve.

[0007] Preferably, the stopping structure includes a stopping plate fixedly mounted on the top end of the double-sided rack, two second supporting plates are provided below the stopping plate, and the two second supporting plates are fixedly connected to the two impact plates respectively.

[0008] Preferably, the elastic member includes two slide plates fixedly mounted on the movable seat, a second groove is opened on the impact plate, the top ends of the two slide plates are respectively located in the two second grooves, and the top of the slide plate and the top inner wall of the second groove are connected by a third spring.

[0009] Preferably, the sliding unit comprises a guide block fixedly mounted on the movable seat, a guide groove is provided on the inner wall of the lifting sleeve, and the guide block is located in the guide groove.

[0010] Preferably, the shaking impactor includes two third rotating shafts arranged under the movable seat, the two third rotating shafts are respectively located on both sides of the double-sided rack, the outer sleeve of the third rotating shaft is provided with a second fixed plate, the connection between the third rotating shaft and the second fixed plate is provided with a bearing, the second fixed plate and the inner wall of the lifting sleeve are fixedly connected, the outer fixed sleeve of the third rotating shaft is provided with a second gear meshing with the double-sided rack, the outer fixed sleeve of the third rotating shaft is provided with a turntable, and a plurality of protrusions are fixedly connected to the turntable.

[0011] Preferably, the ejection unit includes a lifting plate arranged below the partition, the partition is provided with a second through hole, the lifting plate is fixedly connected with a first hydraulic telescopic rod and an ejection column, the first hydraulic telescopic rod and the ejection column both pass through the second through hole, the top end of the first hydraulic telescopic rod is fixedly connected with the bottom of the mounting plate, an ejection hole is provided on the inner wall of the cavity of the lower mold, the ejection column passes through the mounting plate, and the top end of the ejection column is located in the ejection hole, the locking positioning piece includes two mounting strips fixedly installed at the bottom of the lower mold, the mounting plate is provided with two third grooves and two movable holes, the movable holes and the third The grooves are connected through a third through hole, and the two mounting strips are respectively located in the two third grooves. Slots are respectively provided on the sides of the two mounting strips that are away from each other, and plug blocks are provided in the slots, and the plug blocks pass through the third through hole. One side of the plug block and the inner wall of one side of the movable hole are connected through a fourth spring, and an inclined plate located in the movable hole is fixedly connected to the plug block. Two fourth through holes are provided on the partition plate, and a top plate is provided in the fourth through hole. The top end of the top plate is in contact with the corresponding inclined plate, and the bottom end of the top plate is fixedly connected to a movable plate, and the top of the movable plate and the bottom of the mounting plate are connected through a second hydraulic telescopic rod.

[0012] Preferably, the lifting member includes a support plate fixedly mounted on the lifting sleeve, the support plate and the top of the base are connected by a third hydraulic telescopic rod, the press-forming mechanism includes a support seat arranged above the operating table, the support seat and the operating table are connected by a number of support columns, the bottom of the support seat is fixedly connected to a fourth hydraulic telescopic rod, the bottom end of the fourth hydraulic telescopic rod is fixedly connected to the lifting seat, and the bottom of the lifting seat is fixedly connected to the upper mold.

[0013] The present invention also provides a powder cold pressing method for cemented carbide processing, comprising the powder cold pressing device for cemented carbide processing as described above, comprising the following steps:

[0014] Step 1: The staff adds metal powder into the upper trough through the feed pipe and the feed hole, and the metal powder is added into the lower mold. The lifting sleeve is driven upward by the lifting member, and the lifting sleeve drives the partition and the lower mold to move upward;

[0015] Step 2: During the upward movement of the lifting sleeve, the movable seat is periodically impacted by the shaking impactor to make the movable seat vibrate in the vertical direction. The movable seat drives the impact plate to hit the bottom of the movable ring through the elastic member. The movable ring and the connecting column vibrate in the vertical direction relative to the partition plate, thereby making the lower mold vibrate in the vertical direction. By vibrating the lower mold in the vertical direction, the metal powder is evenly distributed in the cavity of the lower mold.

[0016] Step 3: When the lower mold moves up to the preset height, the top of the lower mold passes through the metal powder pile in the feeding trough, and the position of the impact plate is limited by the stop structure to stop the impact plate from moving up vertically. When the impactor is shaken to periodically impact the movable seat again, the impact plate will no longer impact the movable ring, so that the lower mold is fixed relative to the lifting sleeve at this time;

[0017] Step 4: As the lifting sleeve continues to move upward, the pressing plate drives the scraper to rotate by pressing the reciprocating toggle assembly, so that the scraper scrapes off the metal powder overflowing from the cavity of the lower mold. After the metal powder overflowing from the cavity of the lower mold is scraped off, the lifting member stops driving the lifting sleeve to move upward, and the lower mold and the lifting sleeve move up to a preset height, and the metal powder in the lower mold is cold pressed by the pressing molding mechanism;

[0018] Step 5: After the pressing molding mechanism performs cold pressing on the metal powder in the lower mold, the lifting sleeve and the lower mold are driven downward by the lifting member. During the downward movement of the lifting sleeve relative to the impact plate, the pressing plate drives the scraper to rotate in the opposite direction by pressing the reciprocating toggle assembly, so that the scraper is reset to the initial position;

[0019] Step 6: As the lifting sleeve continues to move downward, when the stop structure no longer limits the position of the impact plate, the impact plate moves downward synchronously with the lifting sleeve. As the lifting sleeve continues to move downward, the impactor hits the movable seat again through the shaking impactor, and the movable seat drives the lower mold to shake in the vertical direction through the impact plate, so that the inner wall of the cavity of the lower mold is separated from the molded part;

[0020] Step 7: When the lifting sleeve descends to the preset position, the lifting member stops driving the lifting sleeve downward, and the molded part in the lower mold is ejected by the ejection unit. After the molded part in the lower mold is taken out, the lifting member drives the lifting sleeve to continue to move downward again, so that the lifting sleeve and the lower mold are restored to their initial positions, and the next powder cold pressing process can be carried out again.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The staff adds metal powder into the feed trough through the feed pipe and the feed hole. The metal powder is added into the lower mold, and the lifting sleeve is driven to move upward by the lifting member. The lifting sleeve drives the partition and the lower mold to move upward. During the upward movement of the lifting sleeve, the movable seat is periodically hit by the shaking impactor to make the movable seat shake in the vertical direction. The movable seat drives the impact plate to hit the bottom of the movable ring through the elastic member. The movable ring and the connecting column shake vertically relative to the partition, thereby making the lower mold shake vertically. By shaking the lower mold in the vertical direction, the metal powder is evenly distributed in the cavity of the lower mold. When the lower mold moves up to a preset height, the top of the lower mold The end of the metal powder passes through the metal powder pile in the feeding chute, and the position of the impact plate is limited by the stop structure to stop the impact plate from moving up in the vertical direction. When the shaking impactor periodically hits the movable seat again, the impact plate will no longer hit the movable ring, so that the lower mold is fixed relative to the lifting sleeve at this time. As the lifting sleeve continues to move upward, the pressing plate drives the scraper to rotate by pressing the reciprocating toggle assembly, so that the scraper scrapes off the metal powder overflowing from the cavity of the lower mold. After the metal powder overflowing from the cavity of the lower mold is scraped off, the lifting part stops driving the lifting sleeve to move upward, and the lower mold and the lifting sleeve move up to a preset height. The metal powder in the lower mold is pressed by the pressing molding mechanism. After the metal powder in the lower mold is cold pressed by the pressing molding mechanism, the lifting sleeve and the lower mold are driven downward by the lifting member. During the downward movement of the lifting sleeve relative to the impact plate, the pressing plate drives the scraper to rotate in the opposite direction by pressing the reciprocating toggle assembly to reset the scraper to the initial position. As the lifting sleeve continues to move downward, when the stop structure no longer limits the position of the impact plate, the impact plate moves downward synchronously with the lifting sleeve. As the lifting sleeve continues to move downward, the impactor hits the movable seat again through the shaking impactor. The movable seat drives the lower mold to shake in the vertical direction through the impact plate to separate the inner wall of the cavity of the lower mold from the molded part. When the lifting sleeve drops to the preset position, The lifting member stops driving the lifting sleeve to move downward, and the molded part in the lower mold is ejected by the ejection unit. After the molded part in the lower mold is taken out, the lifting member drives the lifting sleeve to move downward again, so that the lifting sleeve and the lower mold are reset to the initial position, and the next powder cold pressing process can be carried out again. The metal powder is stored in the feeding trough, and the metal powder is added to the cavity of the lower mold in the feeding trough to prevent the metal powder from being scattered at various positions on the operating table, which is convenient for later use. At the same time, it is ensured that a sufficient amount of metal powder is added to the cavity of the lower mold, and the metal powder overflowing from the cavity of the lower mold is scraped off, thereby improving the accuracy of adding metal powder;

[0023] (2) When the lifting sleeve moves upward, the lifting sleeve drives the impact plate to move upward synchronously through the elastic member. When the second support plate on the impact plate contacts the bottom of the stop plate, the impact plate is stationary relative to the double-sided rack and the base. As the lifting sleeve continues to move upward, the impact plate will no longer move in the vertical direction. At the same time, as the lifting sleeve continues to move upward, a pressing plate on one of the impact plates presses the first support plate, and the first support plate, the first bracket and the single-sided rack stop following the lifting sleeve to move upward. The guide column moves downward relative to the first fixed plate, and the second spring is in a stretched state. When the lifting sleeve moves upward, the first gear on the lifting sleeve rolls on the single-sided rack, and the first gear drives the first rotating shaft and the first bevel gear to rotate. The first bevel gear drives the second rotating shaft and the scraper to rotate through the second bevel gear, and the metal powder overflowing from the cavity of the lower mold is scraped off by the scraper. When the lifting sleeve moves downward, the second spring drives the first support plate to move upward relative to the first fixed plate, and the first support plate and the first bracket drive the single-sided rack to move upward, and the single-sided rack drives the first gear to rotate in the opposite direction, so that the scraper rotates in the opposite direction, and finally the scraper is reset to its initial position;

[0024] (3) When the stop structure limits the position of the impact plate and the impact plate cannot move up vertically with the lifting sleeve, as the movable seat and the lifting sleeve continue to move up, the movable seat pushes the slide plate to move up relative to the impact plate, and the third spring is in a compressed state. When the lifting sleeve and the movable seat move down, the length of the third spring becomes longer. When the stop structure no longer limits the position of the impact plate and the movable seat shakes in the vertical direction, the impact plate can vertically hit the movable ring. The guide block and the guide groove are designed to enable the movable seat to move smoothly in the vertical direction relative to the lifting sleeve. When the lifting sleeve moves vertically, the lifting sleeve drives the third rotating shaft to move vertically through the second fixed plate. The second gear rolls on the double-sided rack to make the second gear and the third rotating shaft rotate. The third rotating shaft drives the turntable to rotate. When the protrusion on the turntable hits the bottom of the movable seat, the movable seat drives the impact plate to move vertically through the slide plate and the third spring, so that the impact plate hits the bottom of the movable ring.

[0025] (4) The lifting plate is driven to move in the vertical direction by the first hydraulic telescopic rod, and the lifting plate drives the ejection column to move upward relative to the ejection hole, so that the molded part in the lower mold can be driven upward by the ejection column, and the movable plate and the top plate are driven to move upward by the second hydraulic telescopic rod. The top plate moves on the inclined surface of the inclined plate, and the top plate pushes the inclined plate to move horizontally. The inclined plate drives the plug block to move, and the fourth spring is in a compressed state. When one end of the plug block is disengaged from the slot, the restriction on the position of the mounting strip and the lower mold can be released. The staff drives the lower mold to move upward so that the mounting strip is disengaged from the third groove and the ejection column is disengaged from the ejection hole, and the removal of the lower mold can be completed;

[0026] (5) The height of the lifting sleeve can be adjusted by driving the support plate and the lifting sleeve to move vertically through the third hydraulic telescopic rod, and the metal powder in the lower mold can be pressed by the upper mold by driving the lifting seat and the upper mold to move vertically through the fourth hydraulic telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0028] In the attached picture:

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the cutaway operation table of the present invention;

[0031] Figure 3 For the present invention Figure 2 A local enlarged schematic diagram of the middle A;

[0032] Figure 4 It is a schematic diagram of the structure of the partition cutaway of the present invention;

[0033] Figure 5 It is a schematic structural diagram of the cutaway mold of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the stop structure of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the impact plate cut away in the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the shaking impactor of the present invention.

[0037] In the figure: 1, operating table; 2, base; 3, supporting leg; 4, loading trough; 5, feeding hole; 6, feeding pipe; 7, first through hole; 8, lifting sleeve; 9, lower mold; 10, partition; 11, mounting plate; 12, movable ring; 13, connecting column; 14, first spring; 15, double-sided rack; 16, movable seat; 17, impact plate; 18, scraper; 19, pressing plate; 20, first supporting plate; 21, first bracket; 22, single-sided rack; 23, first groove; 24, first bevel gear; 25, first rotating shaft; 26, second bevel gear; 27, second rotating shaft; 28, first gear; 29, second bracket; 30, guide column; 31, first fixing plate; 32, second spring; 33, stop plate; 34, second supporting plate; 35, guide block; 36, guide groove; 37, slide plate; 38, second groove; 39, third spring; 40, third rotating shaft; 41, second fixed plate; 42, second gear; 43, turntable; 44, convex block; 45, lifting plate; 46, second through hole; 47, first hydraulic telescopic rod; 48, ejection hole; 49, ejection column; 50, mounting strip; 51, third groove; 52, movable hole; 53, third through hole; 54, plug block; 55, fourth spring; 56, slot; 57, tilting plate; 58, fourth through hole; 59, top plate; 60, movable plate; 61, second hydraulic telescopic rod; 62, support plate; 63, third hydraulic telescopic rod; 64, support seat; 65, support column; 66, fourth hydraulic telescopic rod; 67, lifting seat; 68, upper mold. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] Embodiment 1, by Figures 1 to 8The present invention comprises an operating table 1, a base 2 is provided below the operating table 1, the base 2 and the operating table 1 are connected by supporting legs 3, a feeding trough 4 is provided on the operating table 1, a feeding hole 5 is provided on the inner wall of the feeding trough 4, a feeding pipe 6 matched with the feeding hole 5 is fixedly connected to the operating table 1, a first through hole 7 is provided on the bottom inner wall of the feeding trough 4, a lifting sleeve 8 is provided above the base 2, the top of the lifting sleeve 8 passes through the first through hole 7, and the lifting sleeve 8 and the base 2 are connected by a lifting member, a lower mold 9 is provided in the lifting sleeve 8, and a partition is provided below the lower mold 9. The plate 10 is fixedly connected to the inner wall of the lifting sleeve 8, a mounting plate 11 is provided on the top of the partition 10, the mounting plate 11 and the lower mold 9 are connected by a locking positioning piece, and an ejection unit matched with the lower mold 9 is provided on the mounting plate 11, a movable ring 12 is provided below the partition 10, the movable ring 12 and the mounting plate 11 are fixedly connected by at least two connecting columns 13, and the connecting column 13 passes through the partition 10, and the outer sleeve of the connecting column 13 is provided with a first spring 14, and the two ends of the first spring 14 are respectively abutted against the movable ring 12 and the partition 10, and the lifting sleeve 8 A double-sided rack 15 is provided inside, the bottom end of the double-sided rack 15 is fixedly connected to the base 2, a movable seat 16 is provided on the outer sleeve of the double-sided rack 15, the movable seat 16 and the lifting sleeve 8 are connected by a sliding unit, two impact plates 17 are provided above the movable seat 16, the impact plates 17 and the movable seat 16 are connected by elastic members, a shaking impactor matched with the movable seat 16 is provided on the lifting sleeve 8, a stopper structure matched with the impact plate 17 is provided on the double-sided rack 15, the top of the impact plate 17 is in contact with the bottom of the movable ring 12, and a scraper is provided on the top of the lifting sleeve 8 18, a pressing plate 19 is fixedly connected to one of the impact plates 17, the scraper 18 and the pressing plate 19 are connected by a pressing reciprocating toggle assembly, and a pressing molding mechanism is provided on the operating table 1; the metal powder is stored in the feeding trough 4, and the metal powder is added to the cavity of the lower mold 9 in the feeding trough 4 to prevent the metal powder from spilling on various positions on the operating table 1, which is convenient for later use, and at the same time ensures that a sufficient amount of metal powder is added to the cavity of the lower mold 9, and the metal powder overflowing from the cavity of the lower mold 9 is scraped off, thereby improving the accuracy of adding metal powder.

[0040] Embodiment 2, based on embodiment 1, Figure 2 , Figure 3 and Figure 6It is given that the pressing and reciprocating toggle assembly includes a first support plate 20 arranged at the bottom of the pressing plate 19, at least two guide columns 30 are fixedly connected to the first support plate 20, the outer sleeve of the guide column 30 is provided with a first fixing plate 31 and a second spring 32, the first fixing plate 31 is fixedly connected to the inner wall of the lifting sleeve 8, and the two ends of the second spring 32 are respectively fixedly connected to the first support plate 20 and the first fixing plate 31, the first support plate 20 is fixedly connected to the first bracket 21, the first bracket 21 is fixedly connected to the single-sided rack 22, one side of the single-sided rack 22 is provided with a first rotating shaft 25, the outer sleeve of the first rotating shaft 25 is provided with a second bracket 29, a bearing is provided at the connection between the first rotating shaft 25 and the second bracket 29, the second bracket 29 is fixedly connected to the inner wall of the lifting sleeve 8, and one end of the first rotating shaft 25 is fixedly connected to A first gear 28 meshed with the single-sided rack 22, the other end of the first rotating shaft 25 is connected to the scraper 18 through a meshing member, the meshing member includes a first bevel gear 24 fixedly mounted on the first rotating shaft 25, a first groove 23 is provided on the inner wall of the lifting sleeve 8, and the first bevel gear 24 is located in the first groove 23, a second bevel gear 26 meshed with the first bevel gear 24 is provided in the first groove 23, a second rotating shaft 27 is fixedly connected to the second bevel gear 26, the top end of the second rotating shaft 27 is fixedly connected to the scraper 18, and a bearing is provided at the connection between the second rotating shaft 27 and the lifting sleeve 8, the stopping structure includes a stopping plate 33 fixedly mounted on the top end of the double-sided rack 15, two second supporting plates 34 are provided below the stopping plate 33, and the two second supporting plates 34 are respectively fixedly connected to the two impact plates 17;

[0041] When the lifting sleeve 8 moves up, the lifting sleeve 8 drives the impact plate 17 to move up synchronously through the elastic member. When the second support plate 34 on the impact plate 17 contacts the bottom of the stop plate 33, the impact plate 17 is stationary relative to the double-sided rack 15 and the base 2. As the lifting sleeve 8 continues to move up, the impact plate 17 will no longer move in the vertical direction. At the same time, as the lifting sleeve 8 continues to move up, the pressing plate 19 on one of the impact plates 17 presses the first support plate 20, and the first support plate 20, the first bracket 21 and the single-sided rack 22 stop following the lifting sleeve 8 to move up. The guide column 30 moves down relative to the first fixed plate 31, and the second spring 32 is in a stretched state. When the lifting sleeve 8 moves downward, the first gear 28 on the lifting sleeve 8 rolls on the single-sided rack 22, the first gear 28 drives the first rotating shaft 25 and the first bevel gear 24 to rotate, the first bevel gear 24 drives the second rotating shaft 27 and the scraper 18 to rotate through the second bevel gear 26, and the metal powder overflowing from the cavity of the lower mold 9 is scraped off by the scraper 18. When the lifting sleeve 8 moves downward, the second spring 32 drives the first support plate 20 to move upward relative to the first fixed plate 31, the first support plate 20 and the first bracket 21 drive the single-sided rack 22 to move upward, and the single-sided rack 22 drives the first gear 28 to rotate in the opposite direction, so that the scraper 18 rotates in the opposite direction, and finally the scraper 18 returns to its initial position.

[0042] Embodiment 3, based on embodiment 1, Figure 2 , Figure 6 , Figure 7 and Figure 8 The elastic member includes two slide plates 37 fixedly mounted on the movable seat 16, a second groove 38 is provided on the impact plate 17, the top ends of the two slide plates 37 are respectively located in the two second grooves 38, the top of the slide plate 37 and the inner wall of the top of the second groove 38 are connected by a third spring 39, the sliding unit includes a guide block 35 fixedly mounted on the movable seat 16, a guide groove 36 is provided on the inner wall of the lifting sleeve 8, and the guide block 35 is located in the guide groove 36, the shaking impactor includes two third rotating shafts 40 arranged below the movable seat 16, the two third rotating shafts 40 are respectively located on both sides of the double-sided rack 15, the outer sleeve of the third rotating shaft 40 is provided with a second fixed plate 41, the connection between the third rotating shaft 40 and the second fixed plate 41 is provided with a bearing, the second fixed plate 41 is fixedly connected to the inner wall of the lifting sleeve 8, the outer fixed sleeve of the third rotating shaft 40 is provided with a second gear 42 meshing with the double-sided rack 15, the outer fixed sleeve of the third rotating shaft 40 is provided with a rotating disk 43, and a plurality of protrusions 44 are fixedly connected to the rotating disk 43;

[0043] When the stop structure limits the position of the impact plate 17, the impact plate 17 cannot move up vertically with the lifting sleeve 8, as the movable seat 16 and the lifting sleeve 8 continue to move up, the movable seat 16 pushes the slide plate 37 to move up relative to the impact plate 17, and the third spring 39 is in a compressed state. When the lifting sleeve 8 and the movable seat 16 move down, the length of the third spring 39 becomes longer. When the stop structure no longer limits the position of the impact plate 17, when the movable seat 16 shakes in the vertical direction, the impact plate 17 can vertically impact the movable ring 12. Through the design of the guide block 35 and the guide groove 36, the movable ring 12 can be moved upward to prevent the movable ring 12 from moving upward. The movable seat 16 moves smoothly in the vertical direction relative to the lifting sleeve 8. When the lifting sleeve 8 moves in the vertical direction, the lifting sleeve 8 drives the third rotating shaft 40 to move in the vertical direction through the second fixed plate 41. The second gear 42 rolls on the double-sided rack 15 to make the second gear 42 and the third rotating shaft 40 rotate. The third rotating shaft 40 drives the turntable 43 to rotate. When the protrusion 44 on the turntable 43 hits the bottom of the movable seat 16, the movable seat 16 drives the impact plate 17 to move in the vertical direction through the slide plate 37 and the third spring 39, so that the impact plate 17 hits the bottom of the movable ring 12.

[0044] Embodiment 4, based on embodiment 1, Figure 4 and Figure 5The ejection unit includes a lifting plate 45 arranged below the partition 10, a second through hole 46 is provided on the partition 10, a first hydraulic telescopic rod 47 and an ejection column 49 are fixedly connected to the lifting plate 45, the first hydraulic telescopic rod 47 and the ejection column 49 both pass through the second through hole 46, the top of the first hydraulic telescopic rod 47 is fixedly connected to the bottom of the mounting plate 11, an ejection hole 48 is provided on the inner wall of the cavity of the lower mold 9, the ejection column 49 passes through the mounting plate 11, and the top of the ejection column 49 is located in the ejection hole 48, the locking positioning member includes two mounting strips 50 fixedly installed at the bottom of the lower mold 9, and the mounting plate 11 is provided with two third grooves 51 and two movable holes 52, and the movable holes 52 and the third grooves 51 are connected. The two mounting bars 50 are connected through the third through hole 53, and are respectively located in the two third grooves 51. The two mounting bars 50 are respectively provided with slots 56 on the sides away from each other. The slots 56 are provided with plug blocks 54, and the plug blocks 54 pass through the third through hole 53. One side of the plug block 54 and the inner wall of one side of the movable hole 52 are connected by a fourth spring 55. The plug block 54 is fixedly connected with an inclined plate 57 located in the movable hole 52. The partition plate 10 is provided with two fourth through holes 58. The fourth through holes 58 are provided with a top plate 59. The top of the top plate 59 is in contact with the corresponding inclined plate 57. The bottom end of the top plate 59 is fixedly connected with a movable plate 60. The top of the movable plate 60 and the bottom of the mounting plate 11 are connected by a second hydraulic telescopic rod 61.

[0045] The lifting plate 45 is driven to move in the vertical direction by the first hydraulic telescopic rod 47, and the lifting plate 45 drives the ejection column 49 to move upward relative to the ejection hole 48, so that the molded part in the lower mold 9 can be driven to move upward by the ejection column 49, and the movable plate 60 and the top plate 59 are driven to move upward by the second hydraulic telescopic rod 61. The top plate 59 moves on the inclined surface of the inclined plate 57, and the top plate 59 pushes the inclined plate 57 to move horizontally. The inclined plate 57 drives the plug block 54 to move, and the fourth spring 55 is in a compressed state. When one end of the plug block 54 is disengaged from the slot 56, the position restriction of the mounting strip 50 and the lower mold 9 can be released. The staff drives the lower mold 9 to move upward to disengage the mounting strip 50 from the third groove 51, and the ejection column 49 is disengaged from the ejection hole 48, so that the removal of the lower mold 9 is completed.

[0046] Embodiment 5, based on embodiment 1, Figure 1It is given that the lifting member includes a support plate 62 fixedly mounted on the lifting sleeve 8, the support plate 62 and the top of the base 2 are connected by a third hydraulic telescopic rod 63, the pressing and forming mechanism includes a support seat 64 arranged above the operating table 1, the support seat 64 and the operating table 1 are connected by a plurality of support columns 65, the bottom of the support seat 64 is fixedly connected with a fourth hydraulic telescopic rod 66, the bottom end of the fourth hydraulic telescopic rod 66 is fixedly connected with a lifting seat 67, and the bottom of the lifting seat 67 is fixedly connected with an upper mold 68; the support plate 62 and the lifting sleeve 8 are driven to move in the vertical direction by the third hydraulic telescopic rod 63, so as to adjust the height of the lifting sleeve 8, and the lifting seat 67 and the upper mold 68 are driven to move in the vertical direction by the fourth hydraulic telescopic rod 66, so as to press the metal powder in the lower mold 9 through the upper mold 68.

[0047] A powder cold pressing method for cemented carbide processing of this embodiment includes the powder cold pressing device for cemented carbide processing as described above, and includes the following steps:

[0048] Step 1: The staff adds metal powder into the upper trough 4 through the feed pipe 6 and the feed hole 5, and the metal powder is added into the lower mold 9. The lifting sleeve 8 is driven upward by the lifting member, and the lifting sleeve 8 drives the partition 10 and the lower mold 9 to move upward;

[0049] Step 2: During the upward movement of the lifting sleeve 8, the movable seat 16 is periodically impacted by the shaking impactor to make the movable seat 16 vibrate vertically. The movable seat 16 drives the impact plate 17 to impact the bottom of the movable ring 12 through the elastic member. The movable ring 12 and the connecting column 13 vibrate vertically relative to the partition plate 10, thereby making the lower mold 9 vibrate vertically. By vibrating the lower mold 9 vertically, the metal powder is evenly distributed in the cavity of the lower mold 9.

[0050] Step 3: When the lower mold 9 moves up to a preset height, the top of the lower mold 9 passes through the metal powder pile in the feeding trough 4, and the position of the impact plate 17 is limited by the stop structure, so that the impact plate 17 stops moving up in the vertical direction, and when the shaking impactor periodically hits the movable seat 16 again, the impact plate 17 will no longer hit the movable ring 12, so that the lower mold 9 is fixed relative to the lifting sleeve 8 at this time;

[0051] Step 4: As the lifting sleeve 8 continues to move upward, the pressing plate 19 drives the scraper 18 to rotate by pressing the reciprocating toggle assembly, so that the scraper 18 scrapes off the metal powder overflowing from the cavity of the lower mold 9. After the metal powder overflowing from the cavity of the lower mold 9 is scraped off, the lifting member stops driving the lifting sleeve 8 to move upward, and the lower mold 9 and the lifting sleeve 8 move up to a preset height, and the metal powder in the lower mold 9 is cold pressed by the pressing molding mechanism;

[0052] Step 5: After the pressing molding mechanism performs cold pressing on the metal powder in the lower mold 9, the lifting sleeve 8 and the lower mold 9 are driven downward by the lifting member. During the downward movement of the lifting sleeve 8 relative to the impact plate 17, the pressing plate 19 drives the scraper 18 to rotate in the opposite direction by pressing the reciprocating toggle assembly, so that the scraper 18 is reset to the initial position;

[0053] Step 6: As the lifting sleeve 8 continues to move downward, when the stop structure no longer limits the position of the impact plate 17, the impact plate 17 moves downward synchronously with the lifting sleeve 8. As the lifting sleeve 8 continues to move downward, the impactor hits the movable seat 16 again through the shaking impactor. The movable seat 16 drives the lower mold 9 to shake in the vertical direction through the impact plate 17, so that the inner wall of the cavity of the lower mold 9 is separated from the molded part;

[0054] Step seven: When the lifting sleeve 8 descends to the preset position, the lifting member stops driving the lifting sleeve 8 to move downward, and the molded part in the lower mold 9 is ejected by the ejection unit. After the molded part in the lower mold 9 is taken out, the lifting member drives the lifting sleeve 8 to move downward again, so that the lifting sleeve 8 and the lower mold 9 are restored to their initial positions, and the next powder cold pressing process can be carried out again.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder cold pressing device for hard alloy processing, comprising an operating table (1), characterized in that: A base (2) is provided below the operating table (1), the base (2) and the operating table (1) are connected via supporting legs (3), a feeding trough (4) is provided on the operating table (1), a feeding hole (5) is provided on the inner wall of the feeding trough (4), a feeding pipe (6) matched with the feeding hole (5) is fixedly connected to the operating table (1), a first through hole (7) is provided on the bottom inner wall of the feeding trough (4), a lifting sleeve (8) is provided above the base (2), the top end of the lifting sleeve (8) passes through the first through hole (7), and the lifting sleeve (8) and the base (2) are connected by A lifting member is connected, a lower mold (9) is provided in the lifting sleeve (8), a partition (10) is provided below the lower mold (9), the partition (10) and the inner wall of the lifting sleeve (8) are fixedly connected, a mounting plate (11) is provided on the top of the partition (10), the mounting plate (11) and the lower mold (9) are connected through a locking positioning member, an ejection unit matching the lower mold (9) is provided on the mounting plate (11), a movable ring (12) is provided below the partition (10), and the movable ring (12) and the mounting plate (11) are fixedly connected through at least two connecting columns (13), and The connecting column (13) passes through the partition (10), and the outer sleeve of the connecting column (13) is provided with a first spring (14), and the two ends of the first spring (14) are respectively in contact with the movable ring (12) and the partition (10). A double-sided rack (15) is provided inside the lifting sleeve (8), and the bottom end of the double-sided rack (15) is fixedly connected to the base (2). The outer sleeve of the double-sided rack (15) is provided with a movable seat (16), and the movable seat (16) and the lifting sleeve (8) are connected through a sliding unit. Two impact plates (17) are provided above the movable seat (16), and the impact plates (17) ) and a movable seat (16) are connected by an elastic member, a shaking impactor matched with the movable seat (16) is provided on the lifting sleeve (8), a stop structure matched with the impact plate (17) is provided on the double-sided rack (15), the top of the impact plate (17) is in contact with the bottom of the movable ring (12), a scraper (18) is provided on the top of the lifting sleeve (8), a pressing plate (19) is fixedly connected to one of the impact plates (17), the scraper (18) and the pressing plate (19) are connected by a pressing reciprocating toggle assembly, and a pressing molding mechanism is provided on the operating table (1); The pressing and reciprocating toggle assembly comprises a first support plate (20) arranged at the bottom of the pressing plate (19), at least two guide columns (30) are fixedly connected to the first support plate (20), the outer sleeve of the guide column (30) is provided with a first fixing plate (31) and a second spring (32), the first fixing plate (31) and the inner wall of the lifting sleeve (8) are fixedly connected, the two ends of the second spring (32) are respectively fixedly connected to the first support plate (20) and the first fixing plate (31), the first support plate (20) is fixedly connected to the first bracket (21), and the first bracket (32) is fixedly connected to the first support plate (20). A single-sided rack (22) is fixedly connected to the frame (21), a first rotating shaft (25) is provided on one side of the single-sided rack (22), a second bracket (29) is sleeved on the outside of the first rotating shaft (25), a bearing is provided at the connection between the first rotating shaft (25) and the second bracket (29), the second bracket (29) and the inner wall of the lifting sleeve (8) are fixedly connected, one end of the first rotating shaft (25) is fixedly connected to a first gear (28) meshing with the single-sided rack (22), and the other end of the first rotating shaft (25) is connected to the scraper (18) via a meshing member; The stop structure comprises a stop plate (33) fixedly mounted on the top end of the double-sided rack (15), two second support plates (34) are provided below the stop plate (33), and the two second support plates (34) are respectively fixedly connected to the two impact plates (17); The shaking impactor comprises two third rotating shafts (40) arranged below the movable seat (16), the two third rotating shafts (40) are respectively located on both sides of the double-sided rack (15), the outer sleeve of the third rotating shaft (40) is provided with a second fixing plate (41), the connection between the third rotating shaft (40) and the second fixing plate (41) is provided with a bearing, the second fixing plate (41) and the inner wall of the lifting sleeve (8) are fixedly connected, the outer fixing sleeve of the third rotating shaft (40) is provided with a second gear (42) meshing with the double-sided rack (15), and the outer fixing sleeve of the third rotating shaft (40) is provided with a rotating disk (43), and a plurality of protrusions (44) are fixedly connected to the rotating disk (43); The ejection unit comprises a lifting plate (45) arranged below the partition (10), the partition (10) being provided with a second through hole (46), the lifting plate (45) being fixedly connected with a first hydraulic telescopic rod (47) and an ejection column (49), the first hydraulic telescopic rod (47) and the ejection column (49) both passing through the second through hole (46), the top end of the first hydraulic telescopic rod (47) being fixedly connected with the bottom of the mounting plate (11), the inner wall of the cavity of the lower mold (9) being provided with an ejection hole (48), the ejection column (49) passing through the mounting plate (11), and the top end of the ejection column (49) being located in the ejection hole (48), the locking positioning member comprising two mounting bars (50) fixedly mounted on the bottom of the lower mold (9), the mounting plate (11) being provided with two third grooves (51) and two movable holes (52), the movable holes (52) and the third grooves (51) being connected by the third grooves (51 ... The three through holes (53) are connected, the two mounting bars (50) are respectively located in the two third grooves (51), and the two mounting bars (50) are respectively provided with slots (56) on the sides away from each other. The slots (56) are provided with plug blocks (54), and the plug blocks (54) pass through the third through holes (53). One side of the plug block (54) and the inner wall of one side of the movable hole (52) are connected by a fourth spring (55). The plug block (54) is fixedly connected with an inclined plate (57) located in the movable hole (52). Two fourth through holes (58) are provided on the partition plate (10). A top plate (59) is provided in the fourth through holes (58). The top end of the top plate (59) contacts the corresponding inclined plate (57). The bottom end of the top plate (59) is fixedly connected with a movable plate (60). The top of the movable plate (60) and the bottom of the mounting plate (11) are connected by a second hydraulic telescopic rod (61).

2. The powder cold pressing device for cemented carbide processing according to claim 1, characterized in that: The meshing member comprises a first bevel gear (24) fixedly mounted on a first rotating shaft (25); a first groove (23) is formed on an inner wall of the lifting sleeve (8), and the first bevel gear (24) is located in the first groove (23); a second bevel gear (26) meshing with the first bevel gear (24) is provided in the first groove (23); a second rotating shaft (27) is fixedly connected to the second bevel gear (26); a top end of the second rotating shaft (27) is fixedly connected to the scraper (18); and a bearing is provided at a connection between the second rotating shaft (27) and the lifting sleeve (8).

3. The powder cold pressing device for cemented carbide processing according to claim 1, characterized in that: The elastic member comprises two slide plates (37) fixedly mounted on the movable seat (16); a second groove (38) is formed on the impact plate (17); the top ends of the two slide plates (37) are respectively located in the two second grooves (38); the top of the slide plates (37) and the inner wall of the top of the second groove (38) are connected via a third spring (39).

4. The powder cold pressing device for cemented carbide processing according to claim 1, characterized in that: The sliding unit comprises a guide block (35) fixedly mounted on the movable seat (16); a guide groove (36) is provided on the inner wall of the lifting sleeve (8), and the guide block (35) is located in the guide groove (36).

5. The powder cold pressing device for cemented carbide processing according to claim 1, characterized in that: The lifting member comprises a support plate (62) fixedly mounted on the lifting sleeve (8), the support plate (62) and the top of the base (2) being connected via a third hydraulic telescopic rod (63), the press-molding mechanism comprises a support seat (64) arranged above the operating table (1), the support seat (64) and the operating table (1) being connected via a plurality of support columns (65), the bottom of the support seat (64) being fixedly connected to a fourth hydraulic telescopic rod (66), the bottom end of the fourth hydraulic telescopic rod (66) being fixedly connected to a lifting seat (67), and the bottom of the lifting seat (67) being fixedly connected to an upper mold (68).

6. A method for cold pressing a powder for hard alloy processing, comprising the device for cold pressing a powder for hard alloy processing as claimed in claim 1, characterized in that: The following steps are involved: Step 1: A worker adds metal powder into the upper trough (4) through the feed pipe (6) and the feed hole (5), and the metal powder is added into the lower mold (9). The lifting sleeve (8) is driven upward by the lifting member, and the lifting sleeve (8) drives the partition plate (10) and the lower mold (9) to move upward; Step 2: During the upward movement of the lifting sleeve (8), the movable seat (16) is periodically impacted by the shaking impactor, so that the movable seat (16) is vertically shaken, and the movable seat (16) drives the impact plate (17) to impact the bottom of the movable ring (12) through the elastic member, and the movable ring (12) and the connecting column (13) are vertically shaken relative to the partition plate (10), thereby causing the lower mold (9) to be vertically shaken. By vertically shaking the lower mold (9), the metal powder is evenly distributed in the mold cavity of the lower mold (9); Step 3: When the lower mold (9) moves up to a preset height, the top end of the lower mold (9) passes through the metal powder pile in the feeding trough (4), and the position of the impact plate (17) is limited by the stop structure, so that the impact plate (17) stops moving up in the vertical direction, and when the shaking impactor periodically impacts the movable seat (16) again, the impact plate (17) will no longer impact the movable ring (12), so that the lower mold (9) is fixed relative to the lifting sleeve (8) at this time; Step 4: As the lifting sleeve (8) continues to move upward, the pressing plate (19) drives the scraper (18) to rotate by pressing the reciprocating toggle assembly, so that the scraper (18) scrapes off the metal powder overflowing from the cavity of the lower mold (9). After the metal powder overflowing from the cavity of the lower mold (9) is scraped off, the lifting member stops driving the lifting sleeve (8) to move upward, and the lower mold (9) and the lifting sleeve (8) move upward to a preset height, and the metal powder in the lower mold (9) is cold pressed by the pressing molding mechanism; Step 5: After the metal powder in the lower mold (9) is cold-pressed by the pressing molding mechanism, the lifting sleeve (8) and the lower mold (9) are driven downward by the lifting member. During the downward movement of the lifting sleeve (8) relative to the impact plate (17), the pressing plate (19) drives the scraper (18) to rotate in the opposite direction by pressing the reciprocating toggle assembly, so that the scraper (18) is reset to the initial position; Step 6: As the lifting sleeve (8) continues to move downward, when the stop structure no longer limits the position of the impact plate (17), the impact plate (17) moves downward synchronously with the lifting sleeve (8). As the lifting sleeve (8) continues to move downward, the impactor impacts the movable seat (16) again through the shaking impact plate (17). The movable seat (16) drives the lower mold (9) to shake in the vertical direction through the impact plate (17), so that the inner wall of the cavity of the lower mold (9) is separated from the molded part; Step 7: When the lifting sleeve (8) descends to the preset position, the lifting member stops driving the lifting sleeve (8) to move downward, and the molded part in the lower mold (9) is ejected by the ejection unit. After the molded part in the lower mold (9) is taken out, the lifting member drives the lifting sleeve (8) to continue moving downward again, so that the lifting sleeve (8) and the lower mold (9) are reset to the initial position, and the next powder cold pressing process can be carried out again.

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