Hydraulic treatment device for metal powder

Abstract

The invention relates to the technical field of powder forming, in particular to a metal powder hydraulic processing device which comprises a machine box, a hydraulic forming machine, an upper punch, a lower punch, a servo hydraulic machine and a return stroke compensation mechanism. According to the invention, the following problems existing in the process of pressing and forming powder in the prior art can be solved: the deformation of the punch cannot be compensated, so that the two ends of a pressed product are not uniform in stress, and the product is easy to be bad; a product in the pressure maintaining process cannot be subjected to secondary pressing, so that the compactness between powder cannot be ensured, and the pressing effect is influenced; according to the invention, the lower punch is upwards shored to be matched with the upper punch to carry out secondary pressing on a product, so that the compactness of metal powder is ensured, and the pressing effect on the metal powder is enhanced; and after pressing is completed, the jacking amount of the lower punch can be released, so that the return compensation amount of the lower punch can be controlled according to different pressures borne by the product, and bad products are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of powder molding, and particularly relates to a metal powder hydraulic treatment device. Background Art

[0002] The metal powder pressing and forming is widely used in manufacturing metal parts with complex shapes and high performance. The pressing and forming methods of metal powder usually include uniaxial pressing, biaxial pressing and isostatic pressing. Among them, uniaxial pressing is that the upper and lower punches move relative to each other to press the metal powder raw material.

[0003] After the upper and lower punches complete the pressing action on the metal powder, the upper and lower punches no longer continue to apply pressure. During the pressure holding process, the pressed product will spread outwards. Therefore, the side of the punch in contact with the pressed product will undergo elastic deformation, which easily causes uneven stress at both ends of the pressed product and results in cracks or delamination. Therefore, it is necessary to effectively compensate for the deformation amount of the punch to ensure the integrity of the pressed product.

[0004] In the prior art, a large number of technical solutions for metal powder pressing and forming have also been disclosed. For more accurate comparison, for example, Chinese Patent with publication number CN105058841A discloses a powder molding machine, which includes a frame, a control device and a powder filling device. A female template and an upper punch plate for installing a mold are arranged on the frame. The upper punch plate is provided with a crankshaft drive mechanism electrically connected to the control device, the female template is provided with a female template drive mechanism electrically connected to the control device, and an adjustable multi-point positioning device is arranged on the female template.

[0005] The above prior art also uses the uniaxial pressing method to press and form the powder. When in use, by arranging an adjustable multi-point positioning device on the female template, multiple functions of the powder molding machine can be conveniently completed on the same device, and it can be adapted to different product specifications, which greatly facilitates the processing of products.

[0006] However, there are still some deficiencies in the above prior art during the process of pressing and forming the powder: 1. Since the punch will deform after the powder raw material is pressed, in order to ensure the pressing effect of the product, it is necessary to release the deformation amount of the punch. However, the above prior art cannot compensate for the deformation amount of the punch, resulting in uneven stress at both ends of the pressed product, and thus the product is prone to defects.

[0007] 2. In addition, since the powder cannot be compacted immediately during the pressing process, the powder is prone to spread. Therefore, pressure holding is required. However, the above prior art cannot perform secondary pressing on the product during the pressure holding process, so the tightness between the powders cannot be ensured, affecting the pressing effect.

[0008] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing powder pressing molding methods. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a metal powder hydraulic processing device, including a chassis; a hydraulic forming machine, which is installed inside the chassis, and the hydraulic forming machine is composed of an upper punch, a mold and a lower punch arranged in sequence from top to bottom, and a cavity is opened in the middle of the mold; an upper punch is installed at the lower end of the upper punch, and a lower punch is provided at the upper end of the lower punch, and the upper punch and the lower punch cooperate with the cavity to press and form the metal powder raw material in the mold; a servo hydraulic press, which has two and is respectively arranged inside the upper punch and the lower punch, and is used to drive the upper punch and the lower punch to perform a pressing action; a return compensation mechanism is arranged inside the lower punch, and is used to compensate for the deformation of the lower punch according to the pressure applied to the product.

[0010] As a preferred technical solution of the present invention, the lower punch also includes a core rod installed at the output end of the lower servo hydraulic press, the lower punch is slidably sleeved on the outer wall of the core rod, a support seat is arranged above the servo hydraulic press, the support seat is installed on the upper end of the servo hydraulic press through a support, and a stepped hole is opened on the support seat for accommodating the core rod and the lower punch.

[0011] As a preferred technical solution of the present invention, the lower punch is slidably docked in the upper half of the stepped hole, the diameter of the lower half of the stepped hole is larger than the diameter of the core rod, and a lifting column is installed at the lower end of the core rod for supporting the lower punch upward after passing through the lower half of the stepped hole.

[0012] As a preferred technical solution of the present invention, an annular top support plate is movably installed on the upper end of the lower punch, the outer diameter of the annular top support plate is equal to the outer diameter of the lower punch, and a lifting ring is installed on the lower end of the annular top support plate through a plurality of circumferentially evenly distributed connecting columns, and an annular groove for accommodating the lifting ring is opened inside the lower punch.

[0013] As a preferred technical solution of the present invention, a plurality of connecting holes connected to the bottom wall of the annular groove are evenly opened circumferentially inside the lower punch, a threaded rod is passed through the inner wall of the connecting hole by a threaded connection, and the upper end of the threaded rod is rotatably connected to the lifting ring through a return compensation mechanism.

[0014] As a preferred technical solution of the present invention, a telescopic rod is installed at the lower end of the threaded rod, and a pulley is installed at the lower end of the telescopic rod. The multiple pulleys inside the lower punch are connected together by a belt. An installation groove is opened at the lower end of any connecting hole, and a driving motor connected to the pulley is arranged in the installation groove.

[0015] As a preferred technical solution of the present invention, the return stroke compensation mechanism includes a stable seat rotatably mounted on the upper end of the threaded rod. The upper end of the stable seat is provided with an actuator plate through a plurality of telescopic support rods evenly distributed circumferentially. A corrugated cylinder is installed between the stable seat and the actuator plate.

[0016] As a preferred technical solution of the present invention, an oil storage cavity is formed inside the stable seat. The telescopic support rod is composed of a sleeve, a piston pad and a top rod. The sleeve is installed at the upper end of the stable seat. A plurality of oil outlet holes communicating with the sleeve are formed at the upper end of the stable seat. The piston pad is slidably arranged inside the sleeve. A top rod is installed at the upper end of the piston pad. The upper end of the top rod slidably passes through the sleeve and is connected to the actuator plate; An annular cavity for storing hydraulic oil is formed inside the lower punch. A plurality of oil pumps corresponding to the position of the stable seat are installed inside the lower punch. The oil inlet end of the oil pump extends into the annular cavity, and the oil outlet end of the oil pump extends into the annular groove and is connected to the oil storage cavity.

[0017] As a preferred technical solution of the present invention, the upper punching part includes an upper support. A placement hole is formed at the lower end of the upper support. The upper punch is slidably butted in the placement hole. A plurality of longitudinal sliding grooves are evenly formed in the circumferential direction on the inner wall of the placement hole. A lead screw is rotatably installed in the longitudinal sliding groove. A plurality of lead screws are connected by a belt drive; A slider is sleeved on the outer wall of the lead screw by a threaded connection. The slider is slidably butted in the longitudinal sliding groove. A clamping seat is commonly installed on the opposite sides of a plurality of sliders. The upper punch is installed at the lower end of the clamping seat.

[0018] As a preferred technical solution of the present invention, an annular clamping groove is formed on the inner wall of the mold. The cross section of the annular clamping groove is a horizontally arranged triangular structure. An annular elastic sheet matched with the annular clamping groove is installed on the outer wall of the upper support; The mold is divided into an upper mold and a lower mold. The lower mold is installed at the upper end of the support seat. The upper mold is slidably installed on the lower mold. A U-shaped fixed clamp is installed on the outer wall of the lower mold. A linkage piece butted at the opening of the U-shaped fixed clamp is arranged on the outer wall of the upper mold.

[0019] In summary, the present application includes the following beneficial technical effects: First, the present invention presses and forms the metal powder raw material inside the cavity through the mutual cooperation among the upper punching part, the mold and the lower punching part. And the upward support of the lower punch can cooperate with the upper punch to perform secondary pressing on the product, so as to ensure the compactness of the metal powder and enhance the pressing effect on the metal powder; after the pressing is completed, the return stroke compensation mechanism can release the support amount at the top of the lower punch, so as to control the return stroke compensation amount of the lower punch according to the different pressures received by the product and avoid causing defects in the product.

[0020] Second, in the present invention, the hydraulic oil is discharged into the oil storage cavity by an oil pump. The hydraulic oil enters the sleeve through the oil outlet hole and applies a jacking force to the piston pad. The piston pad drives the entire assembly of the actuator plate, lifting ring, connecting column, and annular supporting piece to move slightly upward through the ejector rod, thereby realizing the secondary pressing of the product by the annular supporting piece in cooperation with the upper punch. Moreover, by controlling the small upward movement of the annular supporting piece through a hydraulic transmission method, the stability during the upward movement of the annular supporting piece and the pressing strength on the product can be improved.

[0021] Third, in the present invention, by rotating the lead screw, the upper punch can be driven to move upward or downward, thereby enabling the adjustment of the initial height of the upper punch according to actual needs. Furthermore, during the pressing process, the distance between the upper punch and the lower punch can be ensured to be adjusted, facilitating the pressing of products of different specifications.

[0022] Fourth, in the present invention, when controlling the upward movement of the upper support, under the combined action of the annular elastic piece and the annular clamping groove, the upper die and the product can be driven to move slightly upward as a whole, facilitating the removal of the product from the top of the lower punch, avoiding adhesion, and ensuring the integrity of the product. Subsequently, the upper punch continues to move upward and separates from the product, facilitating the removal of the product from the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the drawings and embodiments.

[0024] Figure 1 is a schematic structural diagram of the present invention.

[0025] Figure 2 is a schematic structural diagram of the hydraulic forming machine of the present invention.

[0026] Figure 3 is a schematic internal structural diagram of the hydraulic forming machine of the present invention.

[0027] Figure 4 is a schematic structural diagram of the lower punching part of the present invention.

[0028] Figure 5 is a schematic first internal structural diagram of the lower punch of the present invention.

[0029] Figure 6 is a schematic second internal structural diagram of the lower punch of the present invention.

[0030] Figure 7 is the present invention Figure 6 partial enlarged view of A.

[0031] Figure 8 is a schematic structural diagram of the upper punching part of the present invention.

[0032] Figure 9 is a working state diagram between the upper punching part and the die of the present invention.

[0033] Figure 10 This is the initial state diagram between the upper punch part of the present invention and the mold.

[0034] In the figure, 1. Chassis; 2. Hydraulic forming machine; 3. Upper punch part; 31. Upper punch head; 32. Upper support; 321. Annular elastic piece; 33. Placing hole; 34. Lead screw; 35. Slide block; 36. Clamping seat; 4. Mold; 41. Cavity; 42. Annular clamping groove; 43. Upper mold; 44. Lower mold; 45. U-shaped fixing clamp; 46. Linking piece; 5. Lower punch part; 51. Lower punch head; 511. Annular top support piece; 512. Connecting column; 513. Lifting ring; 514. Annular groove; 515. Threaded rod; 516. Telescopic rod; 517. Belt pulley; 518. Belt; 519. Driving motor; 52. Mandrel; 53. Support seat; 54. Support column; 55. Step hole; 56. Jacking column; 6. Return stroke compensation mechanism; 61. Stable seat; 62. Telescopic support rod; 621. Sleeve; 622. Piston pad; 623. Thrust rod; 63. Execution plate; 64. Corrugated cylinder; 65. Oil storage cavity; 66. Oil outlet hole; 67. Annular cavity; 68. Oil pump; 69. Controller; 7. Servo hydraulic press. Specific embodiments

[0035] The following combines the attached Figures 1-10 to describe the embodiments of the present invention in detail.

[0036] The embodiment of the present application discloses a metal powder hydraulic treatment device. It should be noted that the metal powder hydraulic treatment device of the present application is mainly applied in the process of pressing and forming metal powder. In terms of technical effects, it can perform secondary pressing on the product through the upward support of the lower punch head 51 after the metal powder raw material is pressed and formed, so as to ensure the compactness of the metal powder and enhance the pressing effect on the metal powder; especially after the pressing is completed, it can release the support amount at the top of the lower punch head 51, so as to control the return stroke compensation amount of the lower punch head 51 according to the different pressures received by the product and avoid causing defects in the product; further, the metal powder hydraulic treatment device of the present application can also adjust the initial height of the upper punch head 31, and then ensure that the distance between the upper punch head 31 and the lower punch head 51 can be adjusted during the pressing process, so as to press products of different specifications.

[0037] Refer to Figure 1 、 Figure 2 and Figure 5As shown in the figure, a hydraulic processing device for metal powder includes a chassis 1; a hydraulic molding machine 2 installed inside the chassis 1. The hydraulic molding machine 2 is composed of an upper punch part 3, a mold 4, and a lower punch part 5 arranged in sequence from top to bottom. A cavity 41 is formed in the middle of the mold 4; an upper punch 31 is installed at the lower end of the upper punch part 3, and a lower punch 51 is arranged at the upper end of the lower punch part 5. The upper punch 31 and the lower punch 51 cooperate with the cavity 41 to press and form the metal powder raw material in the mold 4; there are two servo hydraulic presses 7, which are respectively arranged inside the upper punch part 3 and the lower punch part 5, and are used to drive the upper punch 31 and the lower punch 51 to perform pressing actions; a return stroke compensation mechanism 6 is arranged inside the lower punch 51, and is used to compensate for the deformation amount of the lower punch 51 according to the pressure received by the product.

[0038] In the specific implementation process, first, the servo hydraulic press 7 controls the lower punch part 5 to move upward, so that the lower punch 51 is inserted into the bottom of the cavity 41. Secondly, the metal powder raw material is poured into the cavity 41. Then, the servo hydraulic press 7 controls the upper punch part 3 to move downward and insert into the cavity 41. Through the mutual cooperation between the upper punch part 3, the mold 4, and the lower punch part 5, the metal powder raw material inside the cavity 41 can be pressed and formed.

[0039] During the pressing process, the gaps between the metal powders gradually decrease and become more compact, but the diameter of the cavity 41 remains unchanged. Therefore, the distance between the upper punch part 3 and the lower punch part 5 gradually decreases. During this period, in order to further improve the pressing effect on the metal powder, in this embodiment, the top of the lower punch 51 undergoes elastic deformation and slightly supports upward, so that the lower punch 51 cooperates with the upper punch 31 to perform secondary pressing on the product, thereby being able to adjust the arrangement positions between the metal powders, further removing the gaps between the metal powders, ensuring the compactness of the metal powder, enabling it to have sufficient strength after pressing, and further enhancing the pressing effect on the metal powder.

[0040] In addition, it should be noted that during the secondary pressing process, the product has an inherent expansion requirement due to the secondary extrusion. If the wall thickness of the product is relatively thin, it is easy to generate cracks or delamination under pressure during the secondary pressing process. The return stroke compensation mechanism 6 can release the support amount at the top of the lower punch 51, causing the top of the lower punch 51 to move downward, so as to control the return stroke compensation amount of the lower punch 51 according to the different pressures received by the product and avoid causing defects in the product.

[0041] After the pressing is completed, the servo hydraulic press 7 controls the upper punch 31 to move upward and take it out of the cavity 41, so that the upper punch 31 drives the mold 4 and the product as a whole to move upward slightly, facilitating the removal of the product from the top of the lower punch 51 and avoiding adhesion that affects the blanking; then the upper punch 31 continues to move upward and separates from the product, facilitating the removal of the product from the mold 4.

[0042] Refer to Figure 3 andFigure 4 As shown in the figure, in order to facilitate the pressing and forming of the metal powder raw material by the upper punch part 3, in this embodiment, the lower punch part 5 further includes a mandrel 52 installed at the output end of the lower servo hydraulic press 7. The lower punch head 51 is slidably sleeved on the outer wall of the mandrel 52. A support seat 53 is arranged above the servo hydraulic press 7. The support seat 53 is installed at the upper end of the servo hydraulic press 7 through a support column 54. A stepped hole 55 for accommodating the mandrel 52 and the lower punch head 51 is provided on the support seat 53.

[0043] Further, in this embodiment, the lower punch head 51 is slidably butted with the upper half of the stepped hole 55. The diameter of the lower half of the stepped hole 55 is larger than the diameter of the mandrel 52. A jacking column 56 for jacking up the lower punch head 51 upward after passing through the lower half of the stepped hole 55 is installed at the lower end of the mandrel 52.

[0044] In the specific implementation process, the servo hydraulic press 7 is started. The servo hydraulic press 7 drives the mandrel 52 and the jacking column 56 to move upward as a whole, so that the mandrel 52 is inserted into the cavity 41 to form a core for pressing the metal powder. When the jacking column 56 passes through the stepped hole 55 and abuts against the lower end of the lower punch head 51, the jacking column 56 can jack up the lower punch head 51, so that the lower punch head 51 is inserted into the bottom of the cavity 41, so as to facilitate the cooperation with the upper punch head 31 to press and form the metal powder raw material in the cavity 41.

[0045] Refer to Figure 5 and Figure 6 As shown in the figure, in order to facilitate the secondary pressing of the product to enhance the pressing effect, it is necessary for the top of the lower punch head 51 to be able to jack up. Based on this, in this embodiment, an annular jacking piece 511 is movably installed at the upper end of the lower punch head 51. The outer diameter of the annular jacking piece 511 is equal to the outer diameter of the lower punch head 51. A lifting ring 513 is installed at the lower end of the annular jacking piece 511 through a plurality of connecting columns 512 evenly distributed in the circumferential direction. An annular groove 514 for accommodating the lifting ring 513 is provided inside the lower punch head 51.

[0046] Further, in order to be able to control the automatic jacking of the annular jacking piece 511 to achieve secondary pressing, in this embodiment, a plurality of connecting holes communicating with the inner bottom wall of the annular groove 514 are evenly opened in the circumferential direction inside the lower punch head 51. A threaded rod 515 is inserted through the inner wall of the connecting hole by means of threaded connection. The upper end of the threaded rod 515 is rotatably connected with the lifting ring 513 through a return stroke compensation mechanism 6.

[0047] Further, in this embodiment, a telescopic rod 516 is installed at the lower end of the threaded rod 515. A pulley 517 is installed at the lower end of the telescopic rod 516. Multiple pulleys 517 inside the lower punch 51 are connected together by a belt 518. An installation groove is provided at the lower end of any one of the connection holes. A drive motor 519 connected to the pulley 517 is arranged in the installation groove. It should be noted that the telescopic rod 516 adopted in this embodiment is a multi-section telescopic structure, and only sliding is allowed between adjacent two telescopic sections of the telescopic rod 516, and rotation is not allowed, so that the pulley 517 can transmit torque to the threaded rod 515 through the telescopic rod 516, and then drive the threaded rod 515 to rotate.

[0048] In the specific implementation process, the drive motor 519 is started. The drive motor 519 drives the pulley 517 connected thereto to rotate. This pulley 517 drives other pulleys 517 to rotate synchronously through the belt 518, so that the pulley 517 drives the threaded rod 515 to rotate through the telescopic rod 516. Thus, the threaded rod 515 can drive the lifting ring 513 to move up or down. The lifting ring 513 drives the annular top support piece 511 to move synchronously through the connecting column 512, so as to facilitate adjusting the initial height of the annular top support piece 511. The initial height of the annular top support piece 511 can determine the distance from the upper punch 31. In this way, the height of the cavity 41 can be adjusted, and further, the height of the product can be adjusted according to the actual production requirements.

[0049] During the pressing process of the upper punch 31 and the lower punch 51 on the metal powder raw material, the fine adjustment member can control the annular top support piece 511 to upwardly support and cooperate with the upper punch 31 to perform secondary pressing on the product. Subsequently, the fine adjustment member controls the annular top support piece 511 to move downward for return compensation.

[0050] Refer to Figure 6 and Figure 7 As shown in the figure, in order to facilitate controlling the annular top support piece 511 to slightly move upward for secondary pressing after the product pressing is completed, in this embodiment, the return compensation mechanism 6 includes a stable seat 61 rotatably installed at the upper end of the threaded rod 515. An actuator plate 63 is installed at the upper end of the stable seat 61 through a plurality of telescopic support rods 62 evenly distributed in the circumferential direction. A corrugated tube 64 is installed between the stable seat 61 and the actuator plate 63. The corrugated tube 64 can protect the plurality of telescopic support rods 62, and the corrugated tube 64 can adaptively expand and contract when the distance between the stable seat 61 and the actuator plate 63 changes.

[0051] Furthermore, in this embodiment, an oil storage cavity 65 is formed inside the stabilizing base 61. The telescopic support rod 62 is composed of a sleeve 621, a piston gasket 622, and a push rod 623. The sleeve 621 is installed at the upper end of the stabilizing base 61. A plurality of oil outlet holes 66 communicating with the sleeve 621 are formed at the upper end of the stabilizing base 61. The piston gasket 622 is slidably arranged inside the sleeve 621. The push rod 623 is installed at the upper end of the piston gasket 622. The upper end of the push rod 623 slidably passes through the sleeve 621 and is connected to the actuator plate 63. An annular cavity 67 for storing hydraulic oil is formed inside the lower punch 51. A plurality of oil pumps 68 corresponding to the position of the stabilizing base 61 are installed inside the lower punch 51. The oil inlet end of the oil pump 68 extends into the annular cavity 67. The oil outlet end of the oil pump 68 extends into the annular groove 514 and is communicated with the oil storage cavity 65. A controller 69 electrically connected between the plurality of oil pumps 68 is installed inside the lower punch 51. The controller 69 is a prior art technology, mainly used to control the start and stop of the oil pump 68, which will not be elaborated here.

[0052] In the specific implementation process, the controller 69 energizes and starts the oil pump 68. The oil pump 68 pumps out the hydraulic oil in the annular cavity 67 and discharges it into the oil storage cavity 65, so that the hydraulic oil in the oil storage cavity 65 enters the sleeve 621 through the oil outlet holes 66. Thus, the hydraulic oil applies a jacking force to the piston gasket 622. The piston gasket 622 drives the actuator plate 63 to move upward through the push rod 623. The actuator plate 63 drives the lifting ring 513, the connecting column 512, and the annular top support piece 511 to move upward slightly as a whole, thereby realizing the secondary pressing of the product by the annular top support piece 511 in cooperation with the upper punch 31. And by using hydraulic oil as the transmission medium, the stability of the upward movement of the annular top support piece 511 and the pressing strength on the product can be improved.

[0053] After the specified duration of the secondary pressing of the product, the oil pump 68 slowly pumps out the hydraulic oil in the oil storage cavity 65, so that the hydraulic oil in the sleeve 621 is pumped out and drives the push rod 623 to move downward through the piston gasket 622. The push rod 623 drives the lifting ring 513, the connecting column 512, and the annular top support piece 511 to move downward synchronously, thereby releasing the top support amount at the top of the lower punch 51. And by controlling the different downward movement distances of the annular top support piece 511, the return compensation amount of the annular top support piece 511 can be controlled according to the different pressures received by the product, avoiding product defects.

[0054] Refer to Figure 8As shown in the figure, in order to facilitate the cooperation of the lower punch 51 to press and form the metal powder, in this embodiment, the upper punch part 3 includes an upper support 32. A placement hole 33 is opened at the lower end of the upper support 32. The upper punch 31 is slidably butted in the placement hole 33. A plurality of longitudinal chutes are evenly opened in the circumferential direction of the inner wall of the placement hole 33. A lead screw 34 is rotatably installed in the longitudinal chute. A plurality of lead screws 34 are connected by a belt drive; a slider 35 is sleeved on the outer wall of the lead screw 34 by a threaded connection. The slider 35 is slidably butted in the longitudinal chute. A clamping seat 36 is commonly installed on the opposite sides of the plurality of sliders 35. The upper punch 31 is detachably installed at the lower end of the clamping seat 36, so as to facilitate the replacement of the upper punch 31 according to the product specifications. It should be noted that a through hole is opened at the lower end of one of the longitudinal chutes, and the lower end of the lead screw 34 in this longitudinal chute is installed with an adjusting screw passing through the through hole.

[0055] In the specific implementation process, by rotating the adjusting screw, the adjusting screw drives the connected lead screw 34 to rotate. The lead screw 34 drives other lead screws 34 to rotate synchronously by means of a belt drive. While the lead screw 34 rotates, it drives the slider 35, the clamping seat 36 and the upper punch 31 to move up or down as a whole, so that the initial height of the upper punch 31 can be adjusted according to actual needs, and then the distance between the upper punch 31 and the lower punch 51 can be ensured to be adjusted during the pressing process, so as to facilitate the pressing of products of different specifications.

[0056] Refer to Figure 9 and Figure 10 As shown in the figure, in order to facilitate the rapid discharge of the pressed product, in this embodiment, driving the mold 4 to move up slightly by the upper punch 31 can separate the product from the lower punch 51, and then separate the upper punch 31 from the product. Specifically, an annular clamping groove 42 is opened on the inner wall of the mold 4. The cross-section of the annular clamping groove 42 is a horizontally placed triangular structure. An annular elastic piece 321 matched with the annular clamping groove 42 is installed on the outer wall of the upper support 32, and the side of the annular elastic piece 321 close to the upper support 32 is a hollow structure. The annular elastic piece 321 can elastically deform under the action of an external force, so that the upper and lower sides of the annular elastic piece 321 can converge toward the side close to the upper support 32 under the action of an external force.

[0057] Furthermore, in this embodiment, the mold 4 is divided into an upper mold 43 and a lower mold 44. The lower mold 44 is installed at the upper end of the support seat 53 and does not move. The upper mold 43 is slidably installed on the lower mold 44, and the cavity 41 is located inside the upper mold 43. A U-shaped fixed clamp 45 is installed on the outer wall of the lower mold 44. The opening of the U-shaped fixed clamp 45 faces the upper mold 43. A linkage piece 46 docked at the opening of the U-shaped fixed clamp 45 is arranged on the outer wall of the upper mold 43. The linkage piece 46 is located between the upper and lower horizontal sections of the U-shaped fixed clamp 45.

[0058] In a specific implementation process, when the servo hydraulic press 7 controls the upper punch 31 to move downward to press the metal powder raw material, the annular elastic piece 321 on the outer wall of the upper support 32 abuts against the annular card slot 42 (shown in Figure 9 ). After the product pressing is completed, the servo hydraulic press 7 controls the upper punch 31 to move upward and take it out of the cavity 41, so that the upper support 32 can drive the upper die 43 and the product as a whole to move upward slightly through the cooperation of the annular elastic piece 321 and the annular card slot 42, so as to facilitate taking the product off the top of the lower punch 51, avoid adhesion, and ensure the integrity of the product; when the linkage piece 46 on the side wall of the upper die 43 contacts the horizontal section on the upper side of the U-shaped fixed clamp 45, the upper die 43 is restricted and cannot move upward continuously, so that the upper support 32 drives the annular elastic piece 321 to separate from the annular card slot 42 (shown in Figure 10 ), and the upper die 43 drives the product to move downward and reset under the action of gravity, so that the upper punch 31 is separated from the product, facilitating the taking out of the product.

[0059] During operation: The first step: Start the drive motor 519. The drive motor 519 drives the belt pulley 517 to rotate. The belt pulley 517 drives the threaded rod 515 to rotate through the telescopic rod 516. Thus, the threaded rod 515 can drive the lifting ring 513 to move up or down. The lifting ring 513 drives the annular top support piece 511 to move synchronously through the connecting column 512, so as to adjust the initial height of the annular top support piece 511, thereby being able to adjust the height of the cavity 41, and further facilitating the adjustment of the height of the product according to the actual production requirements.

[0060] Rotate the lead screw 34 to drive the slider 35, the clamping seat 36 and the upper punch 31 as a whole to move up or down, so as to be able to adjust the initial height of the upper punch 31 according to the actual needs, and further ensure that the distance between the upper punch 31 and the lower punch 51 can be adjusted during the pressing process, so as to facilitate the pressing of products of different specifications.

[0061] The second step: Start the servo hydraulic press 7. The servo hydraulic press 7 controls the lower punch 51 to move upward, so that the lower punch 51 is inserted into the bottom of the cavity 41. Secondly, pour the metal powder raw material into the cavity 41, and then control the upper punch 31 to move downward and insert it into the cavity 41 through the servo hydraulic press 7. Through the mutual cooperation among the upper punch 31, the die 4 and the lower punch 51, the metal powder raw material inside the cavity 41 can be pressed into shape.

[0062] Step 3: During the pressing process of the metal powder raw material, the controller 69 energizes and starts the oil pump 68. The oil pump 68 pumps out the hydraulic oil in the annular cavity 67 and discharges it into the oil storage cavity 65, so that the hydraulic oil in the oil storage cavity 65 enters the sleeve 621 through the oil outlet hole 66. Thus, the hydraulic oil exerts a jacking force on the piston pad 622. The piston pad 622 drives the actuator plate 63 to move upward through the ejector rod 623. The actuator plate 63 drives the lifting ring 513, the connecting column 512 and the annular support piece 511 to move upward slightly as a whole, thereby realizing the secondary pressing of the product by the annular support piece 511 in cooperation with the upper punch 31, so as to adjust the arrangement position between the metal powders, further remove the gaps between the metal powders, ensure the compactness of the metal powders, and make it have sufficient strength after pressing, and then enhance the pressing effect on the metal powders.

[0063] After the specified duration of the secondary pressing of the product, the oil pump 68 slowly pumps out the hydraulic oil in the oil storage cavity 65, so that the hydraulic oil in the sleeve 621 is pumped out and drives the ejector rod 623 to move downward through the piston pad 622. The ejector rod 623 drives the lifting ring 513, the connecting column 512 and the annular support piece 511 to move downward synchronously, thereby releasing the support amount at the top of the lower punch 51, and by controlling the different downward movement distances of the annular support piece 511, the return compensation amount of the annular support piece 511 can be controlled according to the different pressures received by the product, avoiding causing defects in the product.

[0064] Step 4: After pressing is completed, the servo hydraulic press 7 drives the upper punch 31 to move upward through the upper support 32 and takes it out of the cavity 41. The upper support 32 can drive the upper die 43 and the product to move upward slightly as a whole through the annular elastic piece 321 in cooperation with the annular card slot 42, so as to facilitate taking the product off the top of the lower punch 51, avoiding adhesion and ensuring the integrity of the product; when the linkage piece 46 on the side wall of the upper die 43 contacts the horizontal section on the upper side of the U-shaped fixed clamp 45, the upper die 43 is restricted and cannot continue to move upward, so that the upper support 32 drives the annular elastic piece 321 to separate from the annular card slot 42, and the upper die 43 drives the product to move downward and reset under the action of gravity, so that the upper punch 31 is separated from the product, facilitating taking out the product.

[0065] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

[0066] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A metal powder hydraulic treatment device, characterized in that, Comprising: A chassis (1); A hydroforming machine (2), installed inside the chassis (1). The hydroforming machine (2) is composed of an upper punching part (3), a die (4), and a lower punching part (5) arranged in sequence from top to bottom. A cavity (41) is formed in the middle of the die (4); An upper punch (31), installed at the lower end of the upper punching part (3). A lower punch (51) is arranged at the upper end of the lower punching part (5). The upper punch (31) and the lower punch (51) cooperate with the cavity (41) to press and form the metal powder raw material in the die (4); A servo hydraulic press (7), with two of them respectively arranged inside the upper punching part (3) and the lower punching part (5), used to drive the upper punch (31) and the lower punch (51) to perform the pressing action; A return stroke compensation mechanism (6), arranged inside the lower punch (51), used to compensate for the deformation amount of the lower punch (51) according to the pressure received by the product.

2. The metal powder hydraulic treatment device according to claim 1, wherein: The lower punching part (5) further includes a mandrel (52) installed at the output end of the lower servo hydraulic press (7). The lower punch (51) is slidably sleeved on the outer wall of the mandrel (52). A support seat (53) is arranged above the servo hydraulic press (7). The support seat (53) is installed at the upper end of the servo hydraulic press (7) through a pillar (54). A stepped hole (55) for accommodating the mandrel (52) and the lower punch (51) is formed in the support seat (53).

3. The metal powder hydraulic treatment device according to claim 2, wherein: The lower punch (51) is slidably butted against the upper half of the stepped hole (55). The diameter of the lower half of the stepped hole (55) is larger than the diameter of the mandrel (52). A jacking column (56) for jacking up the lower punch (51) after passing through the lower half of the stepped hole (55) is installed at the lower end of the mandrel (52).

4. A metal powder hydraulic treatment device according to claim 1, characterized in that: An annular top support piece (511) is movably installed at the upper end of the lower punch (51). The outer diameter of the annular top support piece (511) is equal to the outer diameter of the lower punch (51). A lifting ring (513) is installed at the lower end of the annular top support piece (511) through a plurality of circumferentially uniformly distributed connecting columns (512). An annular groove (514) for accommodating the lifting ring (513) is formed inside the lower punch (51).

5. The metal powder hydraulic treatment device according to claim 4, characterized in that: A plurality of connecting holes communicating with the inner bottom wall of the annular groove (514) are circumferentially and uniformly formed inside the lower punch (51). A threaded rod (515) is threadedly connected through the inner wall of the connecting hole. The upper end of the threaded rod (515) is rotatably connected to the lifting ring (513) through the return stroke compensation mechanism (6).

6. The metal powder hydraulic treatment device according to claim 5, characterized in that: A telescopic rod (516) is installed at the lower end of the threaded rod (515). A pulley (517) is installed at the lower end of the telescopic rod (516). A plurality of pulleys (517) inside the lower punch (51) are connected together through a belt (518). An installation groove is formed at the lower end of any one of the connecting holes. A driving motor (519) connected to the pulley (517) is arranged inside the installation groove.

7. A metal powder hydraulic treatment device according to claim 5, characterized in that: The return stroke compensation mechanism (6) includes a stable seat (61) rotatably installed at the upper end of the threaded rod (515). An execution plate (63) is installed at the upper end of the stable seat (61) through a plurality of circumferentially uniformly distributed telescopic support rods (62). A corrugated tube (64) is installed between the stable seat (61) and the execution plate (63).

8. A metal powder hydraulic treatment device according to claim 7, characterized in that: An oil storage cavity (65) is formed inside the stabilizing base (61). The telescopic support rod (62) consists of a sleeve (621), a piston pad (622), and a push rod (623). The sleeve (621) is installed at the upper end of the stabilizing base (61). A plurality of oil outlet holes (66) communicating with the sleeve (621) are formed at the upper end of the stabilizing base (61). The piston pad (622) is slidably arranged inside the sleeve (621). A push rod (623) is installed at the upper end of the piston pad (622). The upper end of the push rod (623) slidably passes through the sleeve (621) and is connected to the actuator plate (63). An annular cavity (67) for storing hydraulic oil is formed inside the lower punch (51). A plurality of oil pumps (68) corresponding to the position of the stabilizing base (61) are installed inside the lower punch (51). The oil inlet end of the oil pump (68) extends into the annular cavity (67), and the oil outlet end of the oil pump (68) extends into the annular groove (514) and is connected to the oil storage cavity (65).

9. A metal powder hydraulic treatment device according to claim 1, characterized in that: The upper punching part (3) includes an upper support (32). A placement hole (33) is formed at the lower end of the upper support (32). The upper punch (31) is slidably butted inside the placement hole (33). A plurality of longitudinal sliding grooves are evenly formed in the circumferential direction of the inner wall of the placement hole (33). A lead screw (34) is rotatably installed in the longitudinal sliding groove. A plurality of lead screws (34) are connected by a belt drive. A slider (35) is sleeved on the outer wall of the lead screw (34) by a threaded connection. The slider (35) is slidably butted in the longitudinal sliding groove. A clamping seat (36) is jointly installed on the opposite sides of a plurality of sliders (35). The upper punch (31) is installed at the lower end of the clamping seat (36).

10. A metal powder hydraulic treatment device according to claim 9, characterized in that: An annular clamping groove (42) is formed on the inner wall of the mold (4). The cross-section of the annular clamping groove (42) is a horizontally arranged triangular structure. An annular elastic sheet (321) matched with the annular clamping groove (42) is installed on the outer wall of the upper support (32). The mold (4) is divided into an upper mold (43) and a lower mold (44). The lower mold (44) is installed at the upper end of the support seat (53). The upper mold (43) is slidably installed on the lower mold (44). A U-shaped fixed clamp (45) is installed on the outer wall of the lower mold (44). A linkage piece (46) butted at the opening of the U-shaped fixed clamp (45) is arranged on the outer wall of the upper mold (43).

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