Frequency converter shell stamping device

Abstract

The frequency converter shell stamping device particularly relates to the technical field of frequency converter production and comprises a machine shell, a plurality of machine legs are fixedly connected to the lower end of the machine shell, a containing plate is fixedly connected to the inner surface of the machine shell, an upper die is fixedly installed at the lower end of a hydraulic cylinder, and a conveying and oil spraying assembly is arranged on the inner surface of the machine shell. A cooling supporting assembly is arranged on the inner surface of the lower mold and the inner surface of the upper mold. According to the frequency converter shell stamping device, by arranging the oil spraying mechanism, lubricating oil is sprayed to the upper die and the lower die, meanwhile, an aluminum alloy plate in the moving process can be sprayed, friction can be effectively reduced, abrasion between the dies and materials in the stamping process is reduced, the service life of the dies is prolonged, and meanwhile, the production efficiency is improved. And the lubricating oil can improve the stability in the stamping process, reduce the risks of material deformation, wrinkles and cracks, and ensure the surface quality and dimensional precision of the aluminum alloy plate.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converter production, and particularly relates to a stamping device for a frequency converter housing. Background Art

[0002] The stamping technology for the aluminum alloy housing of a frequency converter is a common process for manufacturing the housing of a frequency converter. Due to its light weight, corrosion resistance, and good thermal conductivity, aluminum alloy materials are widely used in the housing design of frequency converters. Through the stamping process, aluminum alloy sheets are pressed into shape by a mold, which can quickly mass-produce housings with high precision and good stability, improve production efficiency, and reduce production costs. The aluminum alloy housing has strong electromagnetic interference resistance, can effectively protect the internal components of the frequency converter, extend its service life, and also has good heat dissipation performance.

[0003] Chinese Patent Publication No. CN202387548U discloses a stamping device for processing the housing of a frequency converter. Technical problem: When punching holes, because the surface of the frequency converter housing frame is not completely flat, the punching accuracy is inaccurate and it is easy to deviate from the position. Technical solution: A stamping device for processing the housing of a frequency converter, including a tabletop; also including a clamping block, a clamping plate, a push rod, etc.; several clamping blocks are fixedly connected to the tabletop; several clamping plates are fixedly connected to the tabletop, and the space size between all the clamping blocks and the clamping plates is the same as the size of the frequency converter housing; a push rod is fixedly connected to the left side of the tabletop. This solution drives the punching tool to move downward through a punching machine, so that the pressing plate presses the cutting area on the upper surface of the frequency converter housing to fit with the support plate. When the punching tool moves upward after punching the upper surface of the frequency converter housing, the pressing plate always has a pressing force on the upper surface of the frequency converter housing, so that the upper surface of the frequency converter housing always fits with the support plate; however, the following defects still exist in the implementation process of the above patent document:

[0004] Although the above patent can avoid the deformation of the housing during the implementation process, it is impossible to apply oil to the upper die, the lower die, and the sheet before stamping, and at the same time, it is impossible to provide stable support operation and circulating cooling operation. Summary of the Invention

[0005] The main purpose of the present invention is to provide a stamping device for a frequency converter housing, which can effectively solve the problems that it is impossible to apply oil to the upper die, the lower die, and the sheet before stamping, and at the same time, it is impossible to provide stable support operation and circulating cooling operation.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: An inverter housing stamping device includes a housing, and a plurality of feet are fixedly connected to the lower end of the housing. A placement plate is fixedly connected to the inner surface of the housing. A lower mold is fixedly installed on the upper end of the placement plate. A hydraulic cylinder is fixedly installed on the upper part of the inner surface of the housing. An upper mold is fixedly installed at the lower end of the hydraulic cylinder. A conveying and oil spraying assembly is arranged on the inner surface of the housing. A cooling and supporting assembly is jointly arranged on the inner surfaces of the lower mold and the upper mold.

[0007] Preferably, the conveying and oil spraying assembly includes a partition plate fixedly connected to the upper end of the placement plate and the inner surface of the housing. A conveying mechanism is arranged on the inner surface of the housing. A hot air mechanism is arranged at the rear part of the inner surface of the housing. An oil spraying mechanism is arranged at the right part of the inner surface of the housing.

[0008] Preferably, the conveying mechanism includes a threaded rod rotatably connected to the inner surface of the housing. A servo motor is fixedly installed at the left part of the inner surface of the housing. The output end of the servo motor is fixedly connected to a rotating rod through a coupling. A gear set is jointly fixedly connected to the outer surface of the rotating rod and the outer surface of the threaded rod. A limiting plate threadedly connected to the outer surface of the threaded rod and slidably connected to the inner surface of the placement plate is provided.

[0009] Preferably, the hot air mechanism includes a hot air box fixedly connected to the rear part of the inner surface of the housing. A connecting pipe fixedly connected to the placement plate is fixedly connected to the front end of the hot air box. A U-shaped pipe is fixedly connected to the upper end of the connecting pipe.

[0010] Preferably, the oil spraying mechanism includes a circular groove block and an oil tank respectively fixedly connected to the right part of the inner surface of the housing. A piston block is slidably connected to the inner surface of the circular groove block. A first spring fixedly connected to the left end of the piston block and the left part of the inner surface of the circular groove block is provided. A spraying pipe fixedly connected to the upper end of the placement plate after passing through and extending through the upper part of the inner surface of the circular groove block is provided. A first communicating pipe fixedly connected to the lower part of the inner surface of the oil tank after passing through and extending through the lower part of the inner surface of the circular groove block is provided. One-way valves are fixedly connected to one ends of the spraying pipe and the first communicating pipe close to each other. A push rod is fixedly connected to the lower end of the limiting plate.

[0011] Preferably, the cooling and supporting assembly includes a fixing ring fixedly connected to the lower end of the placement plate. A supporting mechanism is arranged on the inner surface of the fixing ring. A pushing mechanism is arranged on the inner surface of the upper mold. A cooling mechanism is jointly arranged on the inner surfaces of the upper mold and the upper part of the inner surface of the housing.

[0012] Preferably, the supporting mechanism includes a circular block fixedly connected to the inner surface of the fixing ring. A support rod is slidably connected to the inner surface of the lower mold. A support plate slidably connected to the inner surface of the lower mold is fixedly connected to the upper end of the support rod. A second spring is sleeved on the outer surface of the support rod. The two ends of the second spring are respectively fixedly connected to the lower end of the support plate and the lower part of the inner surface of the lower mold.

[0013] Preferably, a first piston rod which is slidably connected to the inner surface of the circular block is fixedly connected to the lower end of the support rod, an airbag is fixedly connected to the lower end of the support plate, and a second communicating pipe which is fixedly connected to the inner surface of the airbag is penetrated through and extends to the lower part of the inner surface of the circular block.

[0014] Preferably, the pushing mechanism includes two fixing blocks fixedly connected to the inner surface of the upper mold, an extrusion ring is fixedly connected to the upper part of the inner surface of the machine shell, an extrusion rod which is slidably connected to the inner surface of the upper mold is slidably connected to the inner surfaces of the two fixing blocks, third springs are sleeved on the outer surfaces of the two extrusion rods, and two ends of each of the third springs are fixedly connected to a connecting block on the extrusion rod and the upper end of the fixing block respectively.

[0015] Preferably, the cooling mechanism includes a chute block and a placement box which are fixedly connected to the upper part of the inner surface of the machine shell respectively, a second piston rod which is slidably connected to the inner surface of the chute block is fixedly connected to the upper end of the upper mold, a flow channel groove is formed in the inner surface of the upper mold, a third communicating pipe is fixedly connected to the inner surfaces of the chute block and the flow channel groove together, a fourth communicating pipe which is fixedly connected to the lower part of the inner surface of the placement box is penetrated through and extends to the inner surface of the chute block, one-way valves II are fixedly connected to one ends of the third communicating pipe and the fourth communicating pipe which are close to each other, and the placement box is communicated with the flow channel groove through a pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, by arranging an oil spraying mechanism, lubricating oil is sprayed on the upper mold and the lower mold, and at the same time, the aluminum alloy plate during the movement process can also be sprayed, which can effectively reduce friction, reduce the wear between the mold and the material during the stamping process, extend the service life of the mold. At the same time, the lubricating oil can improve the stability of the stamping process, reduce the risks of material deformation, wrinkles and cracking, ensure the surface quality and dimensional accuracy of the aluminum alloy plate. In addition, the lubricating oil can also reduce the heat accumulation during the stamping process, prevent the mold from overheating, and ensure the smooth operation of the equipment.

[0018] 2. In the present invention, by arranging a support mechanism, the aluminum alloy plate is stably supported under the combined action of the second spring and the airbag, which can effectively maintain the stability of the aluminum alloy plate during the stamping process, prevent the plate from deforming or shifting. The supporting effect of the airbag can provide a uniform force distribution during the stamping process, reduce the influence of uneven pressure on the aluminum alloy plate, so as to ensure the stamping accuracy and the surface quality of the plate. The buffering effect of the airbag can effectively absorb the impact force, extend the service life of the equipment and improve the operation efficiency.

[0019] 3. In the present invention, by providing a cooling mechanism, the exchange of water can be achieved during the movement of the upper die, which can timely reduce the temperature of the die surface and the material, prevent the hardening, adhesion or deformation of the die surface caused by excessive temperature, and at the same time avoid the deformation, cracks or surface defects of the aluminum alloy plate due to high temperature during the stamping process. The temperature control of the upper die during the stamping operation can avoid the damage to the die and the material caused by overheating, improve the stamping accuracy, extend the service life of the die, and at the same time improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the casing of the present invention;

[0021] Figure 2 is a schematic structural diagram of the overall content of the present invention;

[0022] Figure 3 is a schematic cross-sectional structural diagram of the whole of the present invention;

[0023] Figure 4 is a schematic structural diagram of the conveying and oil spraying assembly and the cooling and supporting assembly of the present invention;

[0024] Figure 5 is a schematic structural diagram of the conveying mechanism of the present invention;

[0025] Figure 6 is a schematic structural diagram of the hot air mechanism of the present invention;

[0026] Figure 7 is a schematic cross-sectional structural diagram of the oil spraying mechanism of the present invention;

[0027] Figure 8 is a schematic cross-sectional structural diagram of the supporting mechanism of the present invention;

[0028] Figure 9 is a schematic cross-sectional structural diagram of the ejecting mechanism of the present invention;

[0029] Figure 10 is a schematic cross-sectional structural diagram of the cooling mechanism of the present invention.

[0030] In the figure: 1. Machine housing; 2. Machine feet; 3. Placing plate; 4. Lower die; 5. Hydraulic cylinder; 6. Upper die; 7. Conveyor and oil spraying assembly; 71. Partition board; 72. Conveyor mechanism; 721. Threaded rod; 722. Servo motor; 723. Rotating rod; 724. Gear set; 725. Limiting plate; 73. Hot air mechanism; 731. Hot air box; 732. Connecting pipe; 733. U-shaped pipe; 74. Oil spraying mechanism; 741. Round groove block; 742. Oil tank; 743. First spring; 744. Piston block; 745. Spraying pipe; 746. First connecting pipe; 747. First one-way valve; 748. Push rod; 8. Cooling and supporting assembly; 81. Fixed ring; 82. Supporting mechanism; 821. Supporting rod; 822. Supporting plate; 823. Second spring; 824. Round block; 825. First piston rod; 826. Second connecting pipe; 827. Airbag; 83. Pushing mechanism; 831. Extrusion ring; 832. Fixed block; 833. Extrusion rod; 834. Third spring; 84. Cooling mechanism; 841. Slide groove block; 842. Placing box; 843. Second piston rod; 844. Third connecting pipe; 845. Fourth connecting pipe; 846. Second one-way valve; 847. Flow channel groove. Detailed implementation mode

[0031] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation modes.

[0032] Example 1, as Figure 1 、 Figure 2 and Figure 3 shown, a stamping device for the housing of a frequency converter, including a machine housing 1, several machine feet 2 are fixedly connected to the lower end of the machine housing 1, a placing plate 3 is fixedly connected to the inner surface of the machine housing 1, a lower die 4 is fixedly installed on the upper end of the placing plate 3, a hydraulic cylinder 5 is fixedly installed on the upper part of the inner surface of the machine housing 1, an upper die 6 is fixedly installed at the lower end of the hydraulic cylinder 5, a conveyor and oil spraying assembly 7 is arranged on the inner surface of the machine housing 1, and a cooling and supporting assembly 8 is jointly arranged on the inner surfaces of the lower die 4 and the upper die 6.

[0033] In the process of implementing this embodiment, the cut aluminum alloy plate of the frequency converter housing is placed in the conveyor and oil spraying assembly 7, the conveyor and oil spraying assembly 7 is used to load the aluminum alloy plate of the frequency converter housing, and the outer surface of the aluminum alloy plate is blown during the loading process, which can clean the dust and increase the temperature of the aluminum alloy plate at the same time. Then, when it moves between the upper die 6 and the lower die 4, lubricating oil is sprayed on the outer surfaces of the upper die 6 and the lower die 4. Then, the hydraulic cylinder 5 drives the upper die 6 to stamp the aluminum alloy plate placed on the lower die 4, and the aluminum alloy plate is supported by the cooling and supporting assembly 8 during the stamping process. After the stamping is completed, the formed frequency converter housing is pushed, and the upper die 6 is cooled cyclically during the upward movement of the upper die 6.

[0034] The hydraulic cylinder 5, the lower die 4, and the upper die 6 mentioned above all belong to mature stamping technical means and equipment in the existing stamping technology. In this solution, their internal structures, principles, and connection methods will not be elaborated further.

[0035] Specifically, in order to spray oil on the outer shell of the frequency converter before stamping, referring to Figure 4 , Figure 5 , Figure 6 and Figure 7 , in this embodiment, the conveying and oil spraying assembly 7 includes a partition plate 71 fixedly connected to the upper end of the placing plate 3 and the inner surface of the casing 1. A conveying mechanism 72 is arranged on the inner surface of the casing 1, a hot air mechanism 73 is arranged at the rear part of the inner surface of the casing 1, and an oil spraying mechanism 74 is arranged at the right part of the inner surface of the casing 1.

[0036] Furthermore, referring to Figure 4 and Figure 5 , in this embodiment, the conveying mechanism 72 includes a threaded rod 721 rotatably connected to the inner surface of the casing 1. A servo motor 722 is fixedly installed on the left part of the inner surface of the casing 1. The output end of the servo motor 722 is fixedly connected to a rotating rod 723 through a coupling. A gear set 724 is fixedly connected to the outer surfaces of the rotating rod 723 and the threaded rod 721. A limiting plate 725 threadedly connected to the outer surface of the threaded rod 721 and slidably connected to the inner surface of the placing plate 3 is provided.

[0037] Furthermore, referring to Figure 4 and Figure 6 , in this embodiment, the hot air mechanism 73 includes a hot air box 731 fixedly connected to the rear part of the inner surface of the casing 1. A connecting pipe 732 fixedly connected to the hot air box 731 and the placing plate 3 is provided at the front end of the hot air box 731. A U-shaped pipe 733 is fixedly connected to the upper end of the connecting pipe 732.

[0038] During the implementation process, the cut aluminum alloy plate is placed on the inner surface of the limiting plate 725. Subsequently, the output end of the servo motor 722 is started to drive the rotating rod 723 to rotate through the coupling. Under the driving action of the gear set 724, the threaded rod 721 is driven to rotate. Since the threaded rod 721 and the limiting plate 725 are threadedly connected, the limiting plate 725 can slide on the inner surface of the placing plate 3, driving the aluminum alloy plate to move to the right. During the movement, hot air generated by the hot air box 731 is blown out through the connecting pipe 732 and the U-shaped pipe 733 to blow the outer surface of the aluminum alloy plate. On the one hand, it can clean the dust and debris attached to the outer surface of the aluminum alloy plate to avoid surface defects caused by debris during stamping. On the other hand, it can preheat the aluminum alloy plate to increase the temperature of the aluminum alloy plate, reduce the thermal stress during subsequent stamping operations, and reduce the deformation caused by the temperature difference, thereby improving the stamping accuracy and the quality of the finished product.

[0039] The hot air box 731 mentioned above is a mature technical means and equipment in the prior art. In this solution, its function of generating hot air is utilized, and its internal structure, principle, and connection method are described.

[0040] The servo motor 722 mentioned above is a mature driving technical means and equipment in the prior art. In this solution, its output end rotates forward and backward through a coupling and can be locked in time after rotating a set number of turns. Its internal structure, principle, and connection method will not be described further.

[0041] The gear set 724 mentioned above is composed of two bevel gears in the prior art.

[0042] Further, referring to Figure 4 、 Figure 5 and Figure 7 In this embodiment, the oil injection mechanism 74 includes a circular groove block 741 and an oil tank 742 fixedly connected to the right part of the inner surface of the machine shell 1 respectively. A piston block 744 is slidably connected to the inner surface of the circular groove block 741. A first spring 743 fixedly connected to the left end of the piston block 744 is fixedly connected to the left part of the inner surface of the circular groove block 741. The upper part of the inner surface of the circular groove block 741 penetrates and extends to the upper end of the placement plate 3 and is fixedly connected with a spraying pipe 745. The lower part of the inner surface of the circular groove block 741 penetrates and extends to the lower part of the inner surface of the oil tank 742 and is fixedly connected with a first communication pipe 746. One-way valves 747 are fixedly connected to one ends of the spraying pipe 745 and the first communication pipe 746 close to each other. A push rod 748 is fixedly connected to the lower end of the limiting plate 725.

[0043] As can be seen from the above, during the process of the limiting plate 725 moving to the right, it will drive the push rod 748 to insert into the inner cavity of the circular groove block 741, push the piston block 744 to move to the right in the inner cavity of the circular groove block 741, and the first spring 743 is in a stretched state. Subsequently, the piston block 744 will squeeze the lubricating oil in the inner cavity of the circular groove block 741 to spray out through the spraying pipe 745 and the upper one-way valve 747, spray lubricating oil on the upper die 6 and the lower die 4, and at the same time, it can also spray the aluminum alloy plate during the movement process, which can effectively reduce friction, reduce the wear between the die and the material during the stamping process, extend the service life of the die. At the same time, the lubricating oil can improve the stability of the stamping process, reduce the risk of material deformation, wrinkles, and cracking, ensure the surface quality and dimensional accuracy of the aluminum alloy plate. In addition, the lubricating oil can also reduce the heat accumulation during the stamping process, prevent the die from overheating, and ensure the smooth operation of the equipment.

[0044] Secondly, during the process of the limit plate 725 moving leftward, the push rod 748 will gradually move away from the inner cavity of the circular groove block 741, causing the piston block 744 to reset under the tensile reaction force of the first spring 743. During the reset process, due to the action of positive and negative pressure differences, the lubricating oil in the fuel tank 742 will enter the inner cavity of the circular groove block 741 through the first connecting pipe 746 and the first one-way valve 747 located at the lower part, preparing for the next stamping and oil injection.

[0045] The two first one-way valves 747 mentioned above are mature one-way control technical means and equipment in the prior art. In this solution, they are used to control the flow direction of the liquid, and the flow directions of the two first one-way valves 747 are opposite. Therefore, their internal structures, principles, and connection methods will not be elaborated further.

[0046] Embodiment 2: On the basis of Embodiment 1, this embodiment adds a cooling and supporting component 8 for supporting the stamping of the frequency converter housing and cooling the upper die 6, so as to achieve the purpose of supporting the stamping of the frequency converter housing and cooling the upper die 6.

[0047] Specifically, in order to support the stamping of the frequency converter housing and cool the upper die 6, referring to Figure 4 、 Figure 8 、 Figure 9 and Figure 10 , in this embodiment, the cooling and supporting component 8 includes a fixing ring 81 fixedly connected to the lower end of the placing plate 3. A supporting mechanism 82 is arranged on the inner surface of the fixing ring 81. A pushing mechanism 83 is arranged on the inner surface of the upper die 6. A cooling mechanism 84 is jointly arranged on the inner surface of the upper die 6 and the upper part of the inner surface of the machine shell 1.

[0048] Furthermore, referring to Figure 4 and Figure 8 , in this embodiment, the supporting mechanism 82 includes a circular block 824 fixedly connected to the inner surface of the fixing ring 81. A support rod 821 is slidably connected to the inner surface of the lower die 4. The upper end of the support rod 821 is fixedly connected to a support plate 822 that is slidably connected to the inner surface of the lower die 4. A second spring 823 is sleeved on the outer surface of the support rod 821. The two ends of the second spring 823 are respectively fixedly connected to the lower end of the support plate 822 and the lower part of the inner surface of the lower die 4.

[0049] Furthermore, referring to Figure 4 and Figure 8 , in this embodiment, the lower end of the support rod 821 is fixedly connected to a piston rod 825 that is slidably connected to the inner surface of the circular block 824. The lower end of the support plate 822 is fixedly connected to an airbag 827. A second connecting pipe 826 is fixedly connected to the inner surface of the circular block 824 and penetrates through and extends to the inner surface of the airbag 827.

[0050] During the implementation process, when the aluminum alloy plate moves directly above the lower die 4, the hydraulic cylinder 5 is activated at this time to drive the upper die 6 to move downward, performing a stamping operation on the aluminum alloy plate. As a result, the aluminum alloy plate will squeeze the support plate 822 downward, pushing the support rod 821 downward. The second spring 823 is in a compressed state, causing the first piston rod 825 to slide downward on the inner surface of the circular block 824, squeezing the air in the circular block 824 to enter the inside of the airbag 827 through the second connecting pipe 826, filling the airbag 827, and then performing a support operation on the position of the support plate 822. During the downward pressing process of the aluminum alloy plate, a concave frame is formed by the extrusion of the inner surface of the lower die 4, which can effectively maintain the stability of the aluminum alloy plate during the stamping process, preventing the sheet from deforming or shifting. The supporting effect of the airbag 827 can provide a uniform force distribution during the stamping process, reducing the influence of uneven pressure on the aluminum alloy plate, thereby ensuring the stamping accuracy and the surface quality of the sheet. The buffering effect of the airbag 827 can effectively absorb the impact force, extend the service life of the equipment, and improve the operation efficiency.

[0051] Secondly, after the stamping forming is completed, the aluminum alloy plate with the concave frame formed by extrusion will be stuck on the upper die 6. Subsequently, the upper die 6 will move upward. Under the compression reaction force of the second spring 823, the support plate 822 and the first piston rod 825 will return to their initial states.

[0052] The above-mentioned second connecting pipe 826 is a flexible pipe.

[0053] Further, referring to Figure 4 and Figure 9 In this embodiment, the ejection mechanism 83 includes two fixing blocks 832 fixedly connected to the inner surface of the upper die 6. An extrusion ring 831 is fixedly connected to the upper part of the inner surface of the machine shell 1. The inner surfaces of the two fixing blocks 832 are both slidably connected with extrusion rods 833 that are slidably connected to the inner surface of the upper die 6. Springs 834 are sleeved on the outer surfaces of the two extrusion rods 833, and the two ends of the two springs 834 are respectively fixedly connected to the connecting blocks on the extrusion rods 833 and the upper ends of the fixing blocks 832.

[0054] During the implementation process, when the upper end of the extrusion rod 833 contacts the lower end of the extrusion ring 831 during the upward movement of the upper die 6, at this time, it will push the extrusion rod 833 to slide downward on the inner surface of the upper die 6, causing the spring 834 to be in a compressed state. The lower end of the extrusion rod 833 will extend out of the inner cavity of the upper die 6, pushing the formed frequency converter housing stuck on the outer surface of the upper die 6 away from the upper die 6, facilitating the user to perform blanking.

[0055] Further, referring to Figure 4 and Figure 10, in this embodiment, the cooling mechanism 84 includes a chute block 841 and a placement box 842 fixedly connected to the upper part of the inner surface of the machine shell 1 respectively. A second piston rod 843 slidably connected to the inner surface of the chute block 841 is fixedly connected to the upper end of the upper die 6. A flow channel groove 847 is formed in the inner surface of the upper die 6. A third connecting pipe 844 is fixedly connected to the inner surfaces of the chute block 841 and the flow channel groove 847. A fourth connecting pipe 845 is fixedly connected to the inner surface of the chute block 841 and penetrates and extends to the lower part of the inner surface of the placement box 842. One-way valves II 846 are fixedly connected to one ends of the third connecting pipe 844 and the fourth connecting pipe 845 close to each other. The placement box 842 is connected to the flow channel groove 847 through a pipeline.

[0056] During the implementation process, when the upper die 6 moves upward, it will drive the second piston rod 843 to slide upward on the inner surface of the chute block 841, pushing the cold water in the inner cavity of the chute block 841 into the inner cavity of the flow channel groove 847 through the third connecting pipe 844 and the one-way valve II 846 on the third connecting pipe 844. Under the action of heat transfer, the heat generated during the stamping process of the upper die 6 is absorbed. At the same time, the water that originally absorbed heat in the flow channel groove 847 will return to the placement box 842 through the pipeline under the action of extrusion, realizing the exchange of water, being able to timely reduce the temperature of the die surface and the material, preventing the die surface from hardening, adhering or deforming due to too high temperature, and at the same time avoiding the deformation, cracks or surface defects of the aluminum alloy plate during the stamping process due to high temperature, controlling the temperature of the upper die 6 during the stamping operation, avoiding damage to the die and the material caused by overheating, improving the stamping accuracy, extending the service life of the die, and at the same time improving the production efficiency.

[0057] Secondly, when the upper die 6 moves downward, it will drive the second piston rod 843 to slide downward on the inner surface of the chute block 841. Under the action of positive and negative pressure difference, the cooled water in the placement box 842 enters the inner cavity of the chute block 841 through the fourth connecting pipe 845 and the one-way valve II 846 on the fourth connecting pipe 845, realizing the circulating cooling of water.

[0058] The two one-way valves II 846 mentioned above are mature one-way control technical means and equipment in the prior art. In this solution, it is used to control the flow direction of the liquid, and it is ensured that the flow directions of the two one-way valves II 846 are opposite. The internal structure, principle and connection method thereof will not be elaborated anymore.

[0059] The third connecting pipe 844 and the pipelines connecting the placement box 842 and the flow channel groove 847 mentioned above are all soft pipelines.

[0060] The placement box 842 mentioned above is made of mature heat dissipation materials in the prior art, and the specific material type thereof will not be elaborated anymore.

[0061] Workflow: During use, the aluminum alloy plate of the frequency converter housing is fed through the conveying mechanism 72. During the feeding process, blowing operations are carried out through the hot air mechanism 73. When it moves to the set position, the upper die 6, the lower die 4, and the aluminum alloy plate are sprayed with lubricating oil through the oil spraying mechanism 74. During the stamping process, the lower end of the stamping aluminum alloy plate is stably supported through the supporting mechanism 82. After stamping and forming, the formed frequency converter housing stuck to the outer surface of the upper die 6 is detached through the pushing mechanism 83. At the same time, during the upward movement of the upper die 6, the upper die 6 is water-cooled through the cooling mechanism 84.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A stamping device for a frequency converter housing, including a machine housing (1), characterized in that: A plurality of feet (2) are fixedly connected to the lower end of the casing (1). A placement plate (3) is fixedly connected to the inner surface of the casing (1). A lower mold (4) is fixedly installed on the upper end of the placement plate (3). A hydraulic cylinder (5) is fixedly installed on the upper part of the inner surface of the casing (1). An upper mold (6) is fixedly installed at the lower end of the hydraulic cylinder (5). A conveying and oil spraying assembly (7) is arranged on the inner surface of the casing (1). A cooling and supporting assembly (8) is jointly arranged on the inner surfaces of the lower mold (4) and the upper mold (6).

2. The stamping device for the frequency converter housing according to claim 1, characterized in that: The conveying and oil spraying assembly (7) includes a partition plate (71) fixedly connected to the upper end of the placement plate (3) and the inner surface of the casing (1). A conveying mechanism (72) is arranged on the inner surface of the casing (1). A hot air mechanism (73) is arranged at the rear of the inner surface of the casing (1). An oil spraying mechanism (74) is arranged on the right part of the inner surface of the casing (1).

3. A stamping device for the housing of a frequency converter according to claim 2, characterized in that: The conveying mechanism (72) includes a threaded rod (721) rotatably connected to the inner surface of the casing (1). A servo motor (722) is fixedly installed on the left part of the inner surface of the casing (1). The output end of the servo motor (722) is fixedly connected to a rotating rod (723) through a coupling. A gear set (724) is fixedly connected to the outer surfaces of the rotating rod (723) and the threaded rod (721). A limiting plate (725) threadedly connected to the outer surface of the threaded rod (721) and slidably connected to the inner surface of the placement plate (3).

4. A stamping device for the housing of a frequency converter according to claim 2, characterized in that: The hot air mechanism (73) includes a hot air box (731) fixedly connected to the rear of the inner surface of the casing (1). A connecting pipe (732) fixedly connected to the hot air box (731) and fixedly connected to the placement plate (3) is arranged at the front end of the hot air box (731). A U-shaped pipe (733) is fixedly connected to the upper end of the connecting pipe (732).

5. The stamping device for the inverter housing according to claim 3, characterized in that: The oil spraying mechanism (74) includes a circular groove block (741) and an oil tank (742) respectively fixedly connected to the right part of the inner surface of the casing (1). A piston block (744) is slidably connected to the inner surface of the circular groove block (741). A first spring (743) fixedly connected to the left end of the piston block (744) and fixedly connected to the left part of the inner surface of the circular groove block (741) is arranged. A spraying pipe (745) fixedly connected to the upper part of the inner surface of the circular groove block (741) and extending through and to the upper end of the placement plate (3) is arranged. A first communicating pipe (746) fixedly connected to the lower part of the inner surface of the circular groove block (741) and extending through and to the lower part of the inner surface of the oil tank (742) is arranged. One-way valves (747) are fixedly connected to the ends of the spraying pipe (745) and the first communicating pipe (746) close to each other. A push rod (748) is fixedly connected to the lower end of the limiting plate (725).

6. The stamping device for the frequency converter housing according to claim 1, characterized in that: The cooling and supporting assembly (8) includes a fixing ring (81) fixedly connected to the lower end of the placement plate (3). A supporting mechanism (82) is arranged on the inner surface of the fixing ring (81). A pushing mechanism (83) is arranged on the inner surface of the upper mold (6). A cooling mechanism (84) is jointly arranged on the inner surfaces of the upper mold (6) and the upper part of the inner surface of the casing (1).

7. The stamping device for the inverter housing according to claim 6, characterized in that: The support mechanism (82) includes a circular block (824) fixedly connected to the inner surface of the fixed ring (81). A support rod (821) is slidably connected to the inner surface of the lower mold (4). The upper end of the support rod (821) is fixedly connected to a support plate (822) that is slidably connected to the inner surface of the lower mold (4). A second spring (823) is sleeved on the outer surface of the support rod (821), and the two ends of the second spring (823) are respectively fixedly connected to the lower end of the support plate (822) and the lower part of the inner surface of the lower mold (4).

8. The stamping device for the frequency converter housing according to claim 7, wherein: The lower end of the support rod (821) is fixedly connected to a first piston rod (825) that is slidably connected to the inner surface of the circular block (824). The lower end of the support plate (822) is fixedly connected to an airbag (827). A second connecting pipe (826) is fixedly connected to the lower part of the inner surface of the circular block (824) and penetrates and extends to the inner surface of the airbag (827).

9. The stamping device for the outer shell of a frequency converter according to claim 6, characterized in that: The pushing mechanism (83) includes two fixed blocks (832) fixedly connected to the inner surface of the upper mold (6). An extrusion ring (831) is fixedly connected to the upper part of the inner surface of the machine shell (1). The inner surfaces of the two fixed blocks (832) are both slidably connected to an extrusion rod (833) that is slidably connected to the inner surface of the upper mold (6). A third spring (834) is sleeved on the outer surface of each of the two extrusion rods (833), and the two ends of the third spring (834) are respectively fixedly connected to the connecting block on the extrusion rod (833) and the upper end of the fixed block (832).

10. A stamping device for the housing of a frequency converter according to claim 6, characterized in that: The cooling mechanism (84) includes a chute block (841) and a placement box (842) respectively fixedly connected to the upper part of the inner surface of the machine shell (1). The upper end of the upper mold (6) is fixedly connected to a second piston rod (843) that is slidably connected to the inner surface of the chute block (841). A flow channel groove (847) is formed in the inner surface of the upper mold (6). A third connecting pipe (844) is fixedly connected to the inner surfaces of the chute block (841) and the flow channel groove (847). A fourth connecting pipe (845) is fixedly connected to the lower part of the inner surface of the chute block (841) and penetrates and extends to the inner surface of the placement box (842). One-way valves (846) are fixedly connected to the ends of the third connecting pipe (844) and the fourth connecting pipe (845) that are close to each other. The placement box (842) is connected to the flow channel groove (847) through a pipeline.

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