A large-tonnage powder molding machine

Abstract

The present application relates to powder forming equipment technical field, especially to a large tonnage powder forming machine, including shell, base and powder feeding assembly, characterized by further comprising die frame mechanism arranged on the base, the die frame mechanism is composed of lower die assembly, middle die assembly and upper die assembly arranged vertically from bottom to top, the lower die assembly is used for stamping to form outer step, the middle die assembly is provided with forming cavity, the upper die assembly stamps the forming cavity to form inner step, wherein the upper die drive of the upper die assembly is arranged on both sides of the die frame mechanism, the middle die assembly is staggered arranged vertically above the lower die assembly, the die frame mechanism is symmetrically provided with load bearing seat with shoulder in the middle, used for dividing the weight and stamping force of the upper die assembly and the middle die assembly. The present application has the beneficial effects of saving the vertical height of the powder forming machine, compact structure, stable stamping, and adapting to large tonnage production of high-precision complex step workpieces.

Description

Technical Field

[0001] This invention relates to the field of powder forming equipment technology, and in particular to a powder forming machine that is height-saving, has stable stamping, can form complex workpieces, and is suitable for large tonnage applications. Background Technology

[0002] Metal powder forming products require extremely high stamping pressure. Existing powder forming machines generally include an upper die and a lower die. The upper die is driven downward by an upper die drive mechanism, and the lower die is driven upward by a lower die drive mechanism. This causes the upper and lower dies to close, thereby compressing the powder in the die cavity and forming a solid workpiece. With the increasing complexity of the structure of modern workpieces, such as the need to process high-precision multi-layered stepped workpieces, existing powder forming machines require increasingly higher tonnage. However, current large-tonnage powder forming machines generally suffer from problems such as high height, large size, and low space utilization in their structural design.

[0003] For example, Chinese invention patent CN104029413B discloses a fully automatic pressing powder molding machine, including an upper punch cylinder, an upper crossbeam disposed below the upper punch cylinder, a support disposed below the upper crossbeam, a machine housing disposed below the support, and an electrical control box and a pneumatic control box disposed on the left side of the support; a second upper punch plate, a first upper punch plate, a middle template, a first floating plate, a support platform, a floating mandrel, and a second floating plate are sequentially disposed between the upper crossbeam and the machine housing. In this powder molding machine structure, the upper punch cylinder is located at the very top in the longitudinal direction, making the equipment too tall, which is a design flaw in current powder molding machines. Furthermore, the lack of longitudinal structural support strength cannot meet the requirements of large tonnage applications, and the aforementioned structure is unsuitable for processing complex stepped workpieces. Summary of the Invention

[0004] (I) Problems to be solved

[0005] To address the problems existing in the background technology, this invention proposes a large-tonnage powder forming machine, aiming to improve the structural design of existing powder forming machines, making them more compact, stable in stamping, and adaptable to the production of high-precision complex stepped workpieces at large tonnage, thereby overcoming the shortcomings of the existing technology.

[0006] (II) Technical Solution

[0007] A large-tonnage powder molding machine includes a shell, a base, and a powder feeding assembly. It also includes a mold frame mechanism mounted on the base. The mold frame mechanism consists of a lower mold assembly, a middle mold assembly, and an upper mold assembly arranged vertically from bottom to top, all centered on the base. The lower mold assembly is used to stamp out an outer step, the middle mold assembly has a forming cavity, and the upper mold assembly stamps the forming cavity to form an inner step. The upper mold drive of the upper mold assembly is located on both sides of the mold frame mechanism. The middle mold assembly is staggered and positioned vertically above the lower mold assembly. The mold frame mechanism has symmetrically arranged load-bearing seats with shoulders in the middle, which are used to distribute the weight and stamping force of the upper mold assembly and the middle mold assembly.

[0008] As a further improvement of the present invention, the upper mold assembly also includes an upper mold transmission assembly connected to the output end of the upper mold drive, which lifts the upper mold casting plate disposed on the top of the mold frame mechanism. The upper mold casting plate drives the upper template and the upper mold to perform stamping through the detachably connected upper mold punch plate and pressure sensor.

[0009] As a further improvement of the present invention, the upper mold transmission assembly includes an upper mold drive screw that is shaft-driven to the upper mold drive, and a sleeve with an embedded thread that forms a lifting engagement with the upper mold drive screw. A fixing plate is fixedly connected to one end of the sleeve. A support rod is provided between the top of the fixing plate and the upper mold casting plate. The support rod and the upper mold casting plate are adjustablely fixed by the engaging thread. A lifting ring is provided at the top of the support rod to assist in the installation of the casting plate and the support rod. Reinforcing rings are provided at both ends of the support rod that are fixed to the upper mold casting plate.

[0010] As a further improvement of the present invention, the lower die assembly includes a lower die drive disposed in the machine base, a lower die transmission assembly shaft-connected to the output end of the lower die drive, and a lower die punch plate for stamping the outer step. The middle die assembly includes a middle die drive disposed in the machine base and at least two stages of middle die transmission assemblies, and also includes a middle die punch plate with a forming cavity that is lifted by the middle die transmission assembly.

[0011] As a further improvement of the present invention, the lower die transmission assembly includes a lower die transmission plate, a lower die transmission rod, and a lower die support column. The lower die transmission plate is provided with a threaded sleeve on its bottom surface and is connected to the lower die drive via a lower die drive screw for lifting and lowering. At least two lower die transmission rods are fixedly provided on the top surface of the lower die transmission plate and are detachably fixed to the corresponding lower die support columns. The lower die support columns are fixedly provided on the bottom surface of the lower die punch plate.

[0012] As a further improvement of the present invention, the intermediate mold transmission assembly includes an intermediate mold first transmission plate, an intermediate mold first transmission rod, an intermediate mold second transmission plate, and an intermediate mold second transmission rod. The bottom surface of the intermediate mold first transmission plate is provided with a threaded sleeve, which is connected to the intermediate mold drive via an intermediate mold drive screw for lifting. Two intermediate mold first transmission rods are fixedly disposed on the top surface of the intermediate mold first transmission plate and fixedly connected to the bottom surface of the intermediate mold second transmission plate. At least two intermediate mold second transmission rods are fixedly disposed on the intermediate mold second transmission plate and are detachably fixedly connected to the intermediate mold punch plate.

[0013] As a further improvement of the present invention, the first transmission plate of the middle mold is arranged vertically above the transmission plate of the lower mold, the middle mold punch plate is arranged vertically above the lower mold punch plate, a first fixed seat is arranged between the lower mold punch plate and the middle mold punch plate, and a second fixed seat is arranged between the lower mold punch plate and the second transmission plate of the middle mold. The first fixed seat and the second fixed seat are mounted and fixed on the shoulder of the load-bearing seat, and both the first fixed seat and the second fixed seat are provided with vertical through holes for the transmission rod to pass through.

[0014] As a further improvement of the present invention, the middle mold first transmission plate and the lower mold transmission plate are arranged in the same area in the fixed box above the machine base, which is different from the area supported by the load-bearing seat. The load-bearing seat has a cavity and guide post hole in the middle for the upper mold drive screw to pass through. The bottom of the shoulder gradually tapers to the side of the load-bearing seat to form a downward slope.

[0015] As a further improvement of the present invention, the powder feeding assembly includes a hopper and a conveying pipe fixedly disposed on the mold frame mechanism. The conveying pipe is guided by a robotic arm and communicates with the middle mold punch plate. It also includes a guide pipe that connects the middle mold punch plate and the lower mold punch plate.

[0016] As a further improvement of the present invention, the mold frame mechanism is also provided with an electrical control box, which includes a human-machine interface screen and operation buttons, and the electrical control box is electrically connected to the lower mold assembly, the middle mold assembly and the upper mold assembly.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In this invention, the upper mold drive is set on both sides of the equipment. The upper mold casting plate is lifted and lowered by the upper mold transmission assembly, thereby driving the upper template and the upper mold to complete the lifting and stamping forming. Although the transmission thread is increased, for large-tonnage powder molding machines, the top height cannot be too high. It is necessary to change the setting position and transmission method of the upper mold drive, which is beneficial to reduce the vertical height.

[0020] 2. The middle die assembly is staggered above the lower die assembly to form a lower two-stroke structure, which, together with the upper die assembly, can stamp complex stepped structures.

[0021] 3. The space-consuming first transmission plate of the middle mold and the transmission plate of the lower mold are placed in the fixed box part, which is different from the part supported by the load-bearing seat. This increases the support of the load-bearing seat for the stamping part. The structure of the load-bearing seat is compact, which helps to improve the stability and precision of the stamping equipment and enables the equipment to bear greater tonnage requirements. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall shape of the large-tonnage powder forming machine in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall internal shape of the large-tonnage powder forming machine according to an embodiment of the present invention, with the outer shell removed;

[0024] Figure 3 This is a schematic diagram of the overall structure of the mold frame mechanism in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the assembly relationship between the mold frame and the load-bearing seat in an embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional schematic diagram of the upper mold transmission assembly in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the assembly relationship between the middle mold and the lower mold in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the overall structure of the intermediate module component in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structural relationship between the fixed base and the middle and lower molds in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the overall structure of the load-bearing seat in an embodiment of the present invention.

[0031] In the diagram: 1-Base, 2-Middle die assembly, 201-Middle die drive, 202-Middle die drive screw, 203-Middle die first transmission plate, 204-Middle die first transmission rod, 205-Middle die second transmission plate, 206-Middle die second transmission rod, 207-Middle die punch plate, 208-Support column, 3-Lower die assembly, 301-Lower die drive, 302-Lower die drive screw, 303-Lower die transmission plate, 304-Lower die transmission rod, 305-Lower die support column, 306-Lower die punch plate, 307-First fixed seat, 308-Second fixed seat, 4-Upper die assembly, 401-Upper die drive, 402-Upper die drive... 403-Support rod, 404-Upper mold casting plate, 405-Pressure sensor, 406-Upper mold punch plate, 407-Sleeve, 408-Fixing plate, 409-Lifting ring, 410-Reinforcing ring, 411-Upper template, 412-Upper mold, 5-Powder feeding assembly, 501-Hopper, 502-Feeding pipe, 503-Robot arm, 504-Forming cavity, 505-Feeding pipe, 6-Shell, 7-Bearing seat, 701-Shoulder, 702-Lower inclined surface, 703-Guide post hole, 704-Cavity, 8-Electrical control box, 801-Operating panel, 802-Operating button, 9-Fixing box, 901-Box side cavity. Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the following description.

[0033] Example

[0034] Please refer to Figure 1-3 To improve the structural design of existing powder molding machines, making them more compact, stable in stamping, and adaptable to the production of high-precision, complex stepped workpieces at large tonnage, this invention proposes a large-tonnage powder molding machine, including a housing 6, a base 1, and a powder feeding assembly 5. It also includes an electrical control box 8 disposed on the upper side of the housing 6. The electrical control box 8 includes a human-machine interface screen 801 and operation buttons 802 below it. The main structure of the powder molding machine is a mold frame mechanism fixed on the base 1 by screws. The mold frame mechanism is composed of a lower mold assembly 3, a middle mold assembly 2, and an upper mold assembly 4 arranged vertically from bottom to top with the same center. The lower die assembly 3 moves from bottom to top to stamp and form the outer step of the workpiece. The middle die assembly 2 is provided with a forming cavity 504 and is driven to move from bottom to top to stamp. The upper die assembly 4 performs stamping operations on the middle die assembly 2 and the lower die assembly 3 from top to bottom, stamping the metal powder in the forming cavity 504 to form the inner step of the workpiece. The structural components of the middle die assembly 2 are staggered and arranged vertically above the structural components of the lower die assembly 3. The die frame mechanism is symmetrically provided with a load-bearing seat 7 with a shoulder 701 in the middle to distribute the weight and stamping force of the upper die assembly 4 and the middle die assembly 2.

[0035] Specifically, please combine Figure 3-5 To limit the vertical height of the large-tonnage powder molding machine, the upper mold drive 401, originally designed to be on top of the powder molding machine, is set on both sides of the mold frame mechanism, symmetrically arranged on both sides. The specific number of motors of the upper mold drive 401 can be adjusted according to the tonnage of the powder molding machine. Although the number of transmission threads is increased, this drive design makes the punching force of the upper mold assembly 4 of the powder molding machine more stable and powerful. The upper mold assembly 4 includes an upper mold transmission assembly connected to the output end of the upper mold drive 401, an upper mold casting plate 404 that is lifted and set on the top of the mold frame mechanism, an upper mold punching plate 406 and a pressure sensor 405 fixedly connected to the bottom surface of the upper mold casting plate 404, and the other end of the pressure sensor is fixedly connected to the upper template 411 and the upper mold 412 for punching.

[0036] The upper mold transmission assembly includes an upper mold drive screw 402 that is shaft-driven connected to the upper mold drive 401, and a sleeve 407 with embedded threads that form a lifting engagement with the upper mold drive screw 402. The upper mold drive screw passes through the cavity 704 and guide post hole 703 of the support seat 7 and is threadedly engaged with the sleeve 407. One end of the sleeve is fixed to the support seat 7, and the other end is fixedly connected to a fixing plate 408. A support rod 403 is provided between the top of the fixing plate 408 and the upper mold casting plate 404. The support rod 403 and the upper mold casting plate 404 are adjustablely fixed by engaging threads. A lifting ring 409 is provided at the top of the support rod 403 to assist in the installation of the upper mold casting plate 404 and the support rod 403. Reinforcing rings 410 are provided at both ends of the support rod 403 that are fixed to the upper mold casting plate 404.

[0037] Please see Figure 3 and Figure 6 The drives of the lower die assembly 3 and the middle die assembly 2 are both located within the base 1. The lower die drive 301 consists of three servo motors, and the middle die drive 201 consists of two servo motors. The lower die assembly 3 also includes a lower die transmission assembly and a lower die punch plate 306 for stamping the outer step, which are connected to the output shaft of the lower die drive 301. The lower die transmission assembly includes a lower die transmission plate 303, a lower die transmission rod 304, and a lower die support column 305. The bottom surface of the lower die transmission plate 303 is provided with a threaded sleeve, which is connected to the lower die drive 301 by a lower die drive screw 302 for lifting. Four lower die transmission rods 304 are fixedly installed on the top surface of the lower die transmission plate 303 and are detachably fixed to the corresponding lower die support columns 305. The lower die support columns 305 are fixedly installed on the bottom surface of the lower die punch plate 306.

[0038] Please see Figure 3 and Figure 78, 9, The intermediate mold assembly 2 includes an intermediate mold drive 201 and a two-stage intermediate mold transmission assembly disposed within the base 1, and also includes an intermediate mold punch plate 207 with a forming cavity 504 which is lifted by the intermediate mold transmission assembly. The intermediate mold transmission assembly includes an intermediate mold first transmission plate 203, an intermediate mold first transmission rod 204, an intermediate mold second transmission plate 205, and an intermediate mold second transmission rod 206. The bottom surface of the intermediate mold first transmission plate 203 is provided with a threaded sleeve, which is connected to the intermediate mold drive 201 by an intermediate mold drive screw 202 for lifting and lowering. Two intermediate mold first transmission rods 204 are fixedly installed on the top surface of the 203 and fixedly connected to the bottom surface of the intermediate mold second transmission plate 205. Four intermediate mold second transmission rods 206 are fixedly installed on the intermediate mold second transmission plate 205 and detachably fixedly connected to the intermediate mold punch plate 207. The intermediate mold first transmission plate 203 is located vertically above the lower mold transmission plate 303. The two transmission plates are located in the same area in a fixed box above the machine base 1. The side of the fixed box 9 has a box side cavity to accommodate the upper mold drive 401, and the area supported by the load-bearing seat 7 is... In this arrangement, the load-bearing base 7 is fixedly mounted on the fixed box. The space between the two load-bearing bases 7 is small. To make the structure compact and the stamping stable, the first transmission plate 203 of the middle die, originally located between the two load-bearing bases 7, is moved to the inside of the fixed box 9, reducing the gap on the load-bearing bases 7 and saving space. The middle die punch plate 207 is positioned vertically above the lower die punch plate 306. A first fixed seat 307 is provided between the lower die punch plate 306 and the middle die punch plate 207. A second fixed seat 308 is provided between the lower die punch plate 306 and the second transmission plate 205 of the middle die. The first fixed seat 307 and the second fixed seat 308 are mounted and fixed on the shoulder 701 of the load-bearing seat 7. Both the first fixed seat 307 and the second fixed seat 308 have vertical through holes for the transmission rod to pass through. The load-bearing seat 7 has a cavity 704 and a guide post hole 703 in the middle for the upper mold drive screw 402 to pass through. The bottom of the shoulder 701 gradually tapers to the side of the load-bearing seat 7 to form a downward slope 702. This structural design can save as much gap space as possible between the two load-bearing seats 7, allowing the transmission components of the middle mold assembly 2 and the lower mold assembly 3 to pass through.

[0039] Please see Figure 8 The powder feeding assembly 5 includes a hopper 501 and a conveying pipe 502 fixedly mounted on the mold frame mechanism. The conveying pipe 502 is guided by a robotic arm 503 and connected to the middle mold punch plate 207. It also includes a guide pipe 505 connecting the middle mold punch plate 207 and the lower mold punch plate 306. The electrical control box 8 is electrically connected to the lower mold assembly 3, the middle mold assembly 2, and the upper mold assembly 4 to control the stamping process of the three components and produce workpieces with different stepped structures.

[0040] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A large-tonnage powder forming machine, comprising a shell, a base, and a powder feeding assembly, characterized in that: It also includes a mold frame mechanism mounted on the machine base, the mold frame mechanism being composed of a lower mold assembly, a middle mold assembly, and an upper mold assembly arranged vertically from bottom to top with the same center; The lower die assembly is used to stamp and form an outer step. The middle die assembly is provided with a forming cavity. The middle die assembly is driven to move from bottom to top for stamping. The middle die assembly includes a middle die drive and at least two stages of middle die transmission assembly disposed in the machine base. It also includes a middle die punch plate with a forming cavity. The middle die punch plate is lifted by the middle die transmission assembly. The upper die assembly performs stamping operations from top to bottom on the middle die assembly and the lower die assembly, stamping the metal powder in the forming cavity to form the inner step of the workpiece. The upper die assembly includes an upper die drive, wherein the upper die drive of the upper die assembly is arranged on both sides of the die frame mechanism, the middle die assembly is staggered and arranged vertically above the lower die assembly to form a lower two-punch structure, and the middle part of the die frame mechanism is symmetrically provided with a load-bearing seat with a shoulder to distribute the weight and punching force of the upper die assembly and the middle die assembly. The lower die assembly includes a lower die drive housed in the machine base, a lower die transmission assembly shaft-connected to the output end of the lower die drive, and a lower die punch plate for stamping the outer step. The lower die transmission assembly includes a lower die transmission plate, a lower die transmission rod, and a lower die support column. The lower die transmission plate has a threaded sleeve on its bottom surface and is connected to the lower die drive via a lower die drive screw for lifting. At least two lower die transmission rods are fixedly mounted on the top surface of the lower die transmission plate and are detachably fixed to the corresponding lower die support columns. The lower die support columns are fixedly mounted on the bottom surface of the lower die punch plate. The intermediate mold transmission assembly includes a first intermediate mold transmission plate, a first intermediate mold transmission rod, a second intermediate mold transmission plate, and a second intermediate mold transmission rod. The bottom surface of the first intermediate mold transmission plate is provided with a threaded sleeve, which is connected to the intermediate mold drive via a middle mold drive screw for lifting. Two first intermediate mold transmission rods are fixedly installed on the top surface of the first intermediate mold transmission plate. The first intermediate mold transmission rods are fixedly connected to the bottom surface of the second intermediate mold transmission plate. At least two second intermediate mold transmission rods are fixedly installed on the second intermediate mold transmission plate. The second intermediate mold transmission rods are detachably fixedly connected to the intermediate mold punch plate. The first transmission plate of the middle mold is vertically above the transmission plate of the lower mold, and the middle punch plate is vertically above the punch plate of the lower mold. A first fixed seat is provided between the punch plate of the lower mold and the punch plate of the middle mold, and a second fixed seat is provided between the punch plate of the lower mold and the second transmission plate of the middle mold. The first and second fixed seats are mounted and fixed on the shoulder of the support base. Both the first and second fixed seats have vertical through holes for the transmission rod to pass through. The first transmission plate of the middle mold and the lower mold transmission plate are located in the same area in the fixed box above the machine base, which is separate from the area supported by the support base.

2. The large-tonnage powder forming machine according to claim 1, characterized in that: The upper mold assembly also includes an upper mold transmission assembly connected to the output end of the upper mold drive, which lifts the upper mold casting plate disposed on the top of the mold frame mechanism. The upper mold casting plate drives the upper template and the upper mold to perform stamping through a detachably connected upper mold punch plate and a pressure sensor.

3. The large-tonnage powder forming machine according to claim 2, characterized in that; The upper mold transmission assembly includes an upper mold drive screw that is shaft-driven to the upper mold drive, and a sleeve with an embedded thread that forms a lifting engagement with the upper mold drive screw. A fixing plate is fixedly connected to one end of the sleeve. A support rod is provided between the top of the fixing plate and the upper mold casting plate. The support rod and the upper mold casting plate are adjustablely fixed by the engaging thread. A lifting ring is provided at the top of the support rod to assist in the installation of the upper mold casting plate and the support rod. Reinforcing rings are provided at both ends of the support rod that are fixed to the upper mold casting plate.

4. The large-tonnage powder forming machine according to claim 1, characterized in that: The powder feeding assembly includes a feeding pipe and a hopper fixedly mounted on the mold frame mechanism. The feeding pipe is guided by a robotic arm and connected to the middle mold punch plate. It also includes a feed pipe connecting the middle mold punch plate and the lower mold punch plate.

5. The large-tonnage powder forming machine according to claim 1, characterized in that: The mold frame mechanism is also equipped with an electrical control box, which includes a human-machine interface screen and operation buttons. The electrical control box is electrically connected to the lower mold assembly, the middle mold assembly, and the upper mold assembly.

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