Press machine for stretching aluminum shell of capacitor

Abstract

The utility model is applicable to the technical field of metal part processing, and provides a press machine for stretching an aluminum shell of a capacitor, which comprises an operating table, a rotating plate and a stretching mechanism, the rotating plate is rotatably connected onto the operating table, the stretching mechanism is provided with a plurality of lower dies fixedly mounted on the rotating plate at equal angles, and a mounting bracket is further arranged on the operating table on one side of the rotating plate; the mounting bracket is movably connected with a stretching upper die and an oil coating mechanism, the oil coating mechanism is arranged on the outer wall of the other side of the operation table relative to the mounting bracket, the oil coating mechanism is provided with a rotating assembly movably connected to the operation table, the rotating assembly is provided with an oil coating device, the device is further provided with an oil coating device, and the output end of a second electric push rod extends out. The mounting block is pushed to move downwards to press and attach the water absorption sponge full of lubricating oil to the surface of the aluminum part, the lubricating oil on the aluminum part is attached to the aluminum part, so that oiling operation on the surface of the aluminum part is completed, manual oiling is not needed, and the amount of labor needed by workers is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal part processing, and particularly relates to a press for stretching aluminum shells of capacitors. Background Technique

[0002] A press processes metal billets into parts by applying a strong pressure to the metal billets to cause plastic deformation and fracture of the metal. When manufacturing electrolytic capacitors, a shell needs to be equipped for them. Aluminum is generally selected as the material for making the shell of the capacitor. When producing the aluminum shell, an aluminum plate needs to be stamped into a specified aluminum part by a stamping machine (mechanical punch press), and then the aluminum part is stretched into a specified aluminum shell by a press (hydraulic punch press) in cooperation with a stretching die.

[0003] The Chinese utility model patent with the publication number CN216679834U, a punch press for processing aluminum shells of batteries, includes a frame body. A hydraulic push rod is fixedly installed at the top of the frame body. A top die is detachably installed at the bottom of the hydraulic push rod. A spring group is fixedly installed on the surface of the top die. A push plate is detachably installed at the bottom of the spring group. A guide wheel frame is fixedly installed in the middle of the frame body. A sheet material is movably installed at the top of the guide wheel frame. In the utility model, the top die and the bottom die are fitted together through the hydraulic push rod, so that the sheet material can be stamped into a shape. The formed part remains between the top die and the bottom die. Through the elastic spring and the push plate, the formed part can be left outside the bottom die. The rotating shaft body is driven to rotate 180° by a servo motor through a transmission mechanism, so that the bottom die with the formed part can be rotated to the lower part, and then the formed part falls off into the collection tank body for collection, solving the problem that it is inconvenient to demold and collect the formed part when the existing stamping machine processes aluminum shells.

[0004] However, the above-mentioned utility model patent has the following technical problems in actual use:

[0005] First, the above device is equipped with two sets of bottom dies on the outside of the rotating shaft body. When the rotating shaft body rotates so that one of the bottom dies is directly below the top die, the aluminum part is pressed down into the cavity at the top of the bottom die by the downward movement of the top die to complete the stretching and forming of the aluminum part. However, in actual use of the above device, it is necessary to wait for the rotating shaft body to rotate to displace one of the bottom dies to directly below the top die before the aluminum part can be placed in the lower die cavity. At the same time, the top die needs to wait for the aluminum part to be placed before it can be pressed down to complete the stretching and stamping process. During the process of waiting for the bottom die to rotate into place and placing the workpiece, the output end of the hydraulic push rod and the top die are in a standby waiting state. This method hinders the efficiency of the continuous punching of the top die.

[0006] Second, secondly, when the aluminum part is stretched and formed, a layer of lubricating oil needs to be applied to its surface to increase the lubricity during the stretching process of the aluminum part, and to avoid scratches or excessive aluminum chips generated due to breakage during the stretching of the aluminum part. The above device lacks an oiling device for the surface of the aluminum part, so the quality of the aluminum part during the stretching process cannot be guaranteed. Summary of the Utility Model

[0007] The utility model provides a press for stretching the aluminum shell of a capacitor, aiming to solve the problem that when placing aluminum parts in the above-mentioned device mentioned in the background technology, it is necessary to wait for the lower die to rotate in place before placing the aluminum parts. During the waiting process, the upper die is in a standby state. This method delays the continuous stamping and stretching efficiency of the aluminum parts. At the same time, the above-mentioned device lacks an oiling device for applying lubricating oil to the surface of the aluminum parts during stretching, so the stretching quality of the aluminum parts cannot be guaranteed.

[0008] The utility model is realized as follows: A press for stretching the aluminum shell of a capacitor includes: an operation table, on which a rotating plate is rotatably connected; a stretching mechanism, which has: a plurality of lower dies fixedly installed on the rotating plate at equal angles, and each lower die is provided with a lower die cavity for placing the aluminum parts to be processed. And an installation bracket is further arranged on the operation table on one side of the rotating plate, and a stretching upper die is movably connected to the installation bracket. The stretching upper die is used to realize the stretching process of the aluminum parts placed in the lower die cavity. And an oiling mechanism is arranged on the outer wall of the other side of the operation table relative to the installation bracket, and has: a rotating component movably connected to the operation table, and an oiling device is arranged on the rotating component. The oiling device is used to realize the oiling operation on the surface of the aluminum parts placed in the lower die cavity; In this solution, the device is provided with a plurality of lower dies at equal angles on the rotating plate, and each lower die can place the aluminum parts to be processed. When one of the lower dies moves the aluminum parts to the lower part of the upper die seat, the output end of the first electric push rod extends to push the stretching die head downward and squeeze the aluminum parts into the lower die cavity for stretching processing. After the stretching is completed, the first electric push rod pulls the stretching die head upward and disengages from the lower die cavity. At this time, the driving component controls the rotating plate to rotate to turn the next lower die to the lower part of the upper die seat. After the first electric push rod retracts and resets, the next lower die also rotates in place. At this time, the first electric push rod can push the stretching die head downward again to realize the continuous processing of the aluminum parts. In this way, the operator completes the placement of the aluminum parts before the lower die rotates to the lower part of the upper die seat, and there is no need to wait for the time of loading and unloading, which greatly shortens the idle waiting time of the device and improves the production efficiency.

[0009] In addition, the device is also provided with an oiling device. When the operator takes the stretched aluminum parts at the position of the rotating plate far from the upper die seat and then places a new aluminum part for processing, at this time, the output end of the second electric push rod extends to push the installation block downward to press the water-absorbing sponge full of lubricating oil against the surface of the aluminum part. The lubricating oil on the aluminum part adheres to the aluminum part, thus completing the oiling operation on the surface of the aluminum part. There is no need for manual oiling, which greatly reduces the labor intensity of the operator.

[0010] Preferably, the mounting bracket includes a vertical portion and a horizontal portion. The horizontal portion is integrally formed perpendicular to the top end of the vertical portion, and the vertical portion is erected on the operation table, with its bottom end fixedly connected to the top wall of the operation table. The stretching upper die has a first electric push rod fixedly installed at the top end of the horizontal portion. A die holder is also provided below the horizontal portion. The output end of the first electric push rod is fixedly connected to the die holder, and a stretching die head adapted to the lower die cavity is detachably and fixedly installed at the bottom end of the die holder. In this solution, when one of the lower dies carrying aluminum parts rotates horizontally with the rotating plate to the lower part of the die holder, the rotating plate stops rotating at this time. Subsequently, the output end of the first electric push rod extends and pushes the die holder downward. The die holder drives the stretching die head to move downward synchronously and drives the stretching die head to contact the surface of the aluminum part, and presses the aluminum part into the lower die cavity, and uses the lower die cavity to perform stretching processing on the aluminum part.

[0011] Preferably, a driving component for controlling the horizontal rotation of the rotating plate is further provided at the bottom of the operation table. The driving component has a support plate horizontally fixedly connected to the bottom of the operation table through a plurality of support rods. A rotating shaft is erected and fixedly connected to the center of the rotating plate. The bottom end of the rotating shaft penetrates the operation table and is rotatably connected to the support plate. A first motor is also fixedly connected to the bottom of the support plate, and a first gear is fixedly installed at its output end. A second gear is fixedly connected to the outer wall of the rotating shaft. The first gear and the second gear are meshed and connected. In this solution, the output end of the first motor drives the first gear to rotate. The first gear transfers the rotational kinetic energy to the second gear. Since the second gear is fixedly connected to the rotating shaft and the rotating shaft is fixedly connected to the rotating plate, when the rotating shaft rotates, it will drive the rotating plate to rotate horizontally, so as to control the plurality of lower dies fixedly connected thereto to rotate to the lower part of the die holder in sequence to achieve continuous processing of aluminum parts.

[0012] Preferably, the rotating component includes a rotating column erected on one side of the rotating plate and rotatably connected to the operation table. A third gear is fixedly installed on the outer wall of the rotating column, and a connecting plate parallel to the top wall of the operation table is also fixedly connected to the outer wall of the top end of the rotating column. The oiling device is arranged on the connecting plate. A second motor is also fixedly connected to the bottom wall of the operation table, and a fourth gear is fixedly installed at its output end. The third gear and the fourth gear are meshed. In this solution, when the output end of the second motor rotates, it drives the fourth gear to rotate. The fourth gear is meshed with the third gear, so the rotational kinetic energy will be transferred to the third gear and the rotating column to control the rotation of the rotating column. When the rotating column rotates, it controls the horizontal rotation of the connecting plate, and rotates the oiling devices at both ends thereof to the upper part of the corresponding lower die and the upper part of the oil storage tank respectively.

[0013] Preferably, the third gear is a half gear; in this solution, by setting the third gear as a half gear, the rotation angle of the rotating column can be effectively controlled, so that the oiling devices at both ends of the connecting plate can be respectively located above the corresponding lower die and the oil storage tank after rotation, facilitating the subsequent oiling devices on both sides to apply lubricating oil to the aluminum parts in the lower die cavity or replenish the lubricating oil in the water-absorbing sponge from the oil storage tank.

[0014] Preferably, the oiling device includes: an oil storage tank disposed on the other side of the rotating column relative to the rotating plate, an oil storage groove is opened on the top wall thereof, and second electric push rods are fixedly installed on the top walls at both ends of the connecting plate. A mounting block located below the connecting plate is fixedly connected to the output end of each second electric push rod, and a water-absorbing sponge is detachably connected in the mounting block; in this solution, when one side of the oiling device rotates along the connecting plate to the upper part of the oil storage tank, the output end of the second electric push rod extends to push the mounting block downward, and the mounting block drives the water-absorbing sponge to enter the oil storage groove to absorb lubricating oil. Then the output end of the second electric push rod contracts to pull the water-absorbing sponge out of the lubricating oil, and then it rotates along the connecting plate to the upper part of the rotating plate and corresponds to one of the lower dies. Then the output end of the second electric push rod extends to push the water-absorbing sponge downward to fit on the aluminum part, and the lubricating oil is applied to the aluminum part to complete the oiling operation on it.

[0015] Compared with the prior art, the beneficial effects of the present utility model are: A press for stretching the aluminum shell of a capacitor of the present utility model:

[0016] 1. In this device, a plurality of lower dies are equiangularly arranged on the rotating plate, and aluminum parts to be processed can be placed in each lower die. When one of the lower dies carrying the aluminum part moves below the upper die base, the output end of the first electric push rod extends to push the stretching die head downward and squeeze the aluminum part into the lower die cavity for stretching processing. After the stretching is completed, the first electric push rod pulls the stretching die head upward and disengages it from the lower die cavity. At this time, the driving component controls the rotation of the rotating plate to rotate the next lower die to below the upper die base. After the first electric push rod retracts and resets, the next lower die also rotates into place. At this time, the first electric push rod can push the stretching die head downward again to realize continuous processing of the aluminum parts. In this way, the operator completes the placement of the aluminum parts before the lower die rotates to below the upper die base, without waiting for the time of loading and unloading, greatly shortening the idle waiting time of this device and improving the production efficiency.

[0017] 2. This device is also provided with an oiling device. When the operator takes the stretched aluminum part at the position of the rotating plate far from the upper die base and then places a new aluminum part waiting for processing, at this time, the output end of the second electric push rod extends to push the mounting block downward to press the water-absorbing sponge full of lubricating oil against the surface of the aluminum part, and the lubricating oil on the aluminum part adheres to the aluminum part, thus completing the oiling operation on the surface of the aluminum part without manual oiling, greatly reducing the labor intensity of the operator. Brief Description of the Drawings

[0018] Figure 1 is the front view of the present utility model;

[0019] Figure 2 of the present utility model Figure 1 is an enlarged view of the structure at A in the present utility model;

[0020] Figure 3 is the side view of the rotating assembly in the present utility model;

[0021] In the figure:

[0022] 1. Operating table; 11. Rotating plate; 12. Driving assembly; 121. Support rod; 122. Support plate; 123. Rotating shaft; 124. First motor; 125. First gear; 126. Second gear;

[0023] 2. Stretching mechanism; 21. Lower die; 22. Mounting bracket; 221. Vertical part; 222. Horizontal part; 23. Stretching upper die; 231. First electric push rod; 232. Upper die base; 233. Stretching die head;

[0024] 3. Oil coating mechanism; 31. Rotating assembly; 311. Rotating column; 312. Third gear; 313. Fourth gear; 314. Connecting plate; 315. Second motor; 32. Oil coating device; 321. Oil storage tank; 322. Second electric push rod; 323. Mounting block; 324. Absorbent sponge. Detailed Description of the Preferred Embodiment

[0025] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0026] Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0027] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Please refer to Figures 1-3 , the present utility model provides a technical solution: a press for stretching the aluminum shell of a capacitor, including: an operating table 1, on which a rotating plate 11 is rotatably connected, a stretching mechanism 2, which has: a plurality of lower dies 21 fixedly installed on the rotating plate 11 at equal angles, and each lower die 21 is provided with a lower die cavity for placing the aluminum parts to be processed. And on the operating table 1 on one side of the rotating plate 11, there is also an installation bracket 22, and a stretching upper die 23 is movably connected to the installation bracket 22. The stretching upper die 23 is used to stretch the aluminum parts placed in the lower die cavity. And an oiling mechanism 3, which is arranged on the outer wall of the other side of the operating table 1 relative to the installation bracket 22, and has: a rotating assembly 31 movably connected to the operating table 1, and an oiling device 32 is arranged on the rotating assembly 31. The oiling device 32 is used to perform an oiling operation on the surface of the aluminum parts placed in the lower die cavity.

[0031] Specifically, in this device, to facilitate the stretching process of aluminum parts of different sizes or to stretch the aluminum parts into specified specifications, both the stretching die head 233 and the lower die 21 are detachably connected to the upper die base 232 and the rotating plate 11. Among them, a ring-shaped block is fixedly connected to the outer side of the lower die 21, and a plurality of through holes are equiangularly arranged on the ring-shaped block. Moreover, a plurality of installation areas for placing the lower die 21 are provided on the rotating plate 11. A fixing hole is correspondingly arranged in each installation area for each through hole. A locking bolt passes through the through hole, and the threaded section of the locking bolt is screwed into the fixing hole to achieve the assembly of the lower die 21. Similarly, a slot is also opened on the stretching die head 233, and a connection hole corresponding to the slot is opened in the upper die base 232. A locking bolt passes through the slot, and its threaded section is screwed into the connection hole to complete the assembly of the stretching die head 233. Subsequently, only by disassembling the bolt can the stretching die head 233 and the lower die 21 be replaced.

[0032] Furthermore, the mounting bracket 22 includes: a vertical portion 221 and a horizontal portion 222. The horizontal portion 222 is integrally formed perpendicularly at the top end of the vertical portion 221, and the vertical portion 221 is erected on the operating table 1, and its bottom end is fixedly connected to the top wall of the operating table 1. The stretching upper die 23 has: a first electric push rod 231 fixedly installed at the top end of the horizontal portion 222. Moreover, an upper die base 232 is arranged below the horizontal portion 222. The output end of the first electric push rod 231 is fixedly connected to the upper die base 232, and a stretching die head 233 adapted to the lower die cavity is detachably and fixedly installed at the bottom end of the upper die base 232.

[0033] Furthermore, a driving assembly 12 for controlling the horizontal rotation of the rotating plate 11 is also arranged at the bottom of the operating table 1. The driving assembly 12 has: a support plate 122 horizontally fixedly connected to the bottom of the operating table 1 through a plurality of support rods 121. A rotating shaft 123 is fixedly connected vertically at the center of the rotating plate 11. The bottom end of the rotating shaft 123 penetrates the operating table 1 and is rotatably connected to the support plate 122. A first motor 124 is also fixedly connected to the bottom of the support plate 122, and a first gear 125 is fixedly installed on its output end. A second gear 126 is fixedly connected to the outer wall of the rotating shaft 123, and the first gear 125 and the second gear 126 are meshed and connected.

[0034] Furthermore, the rotating assembly 31 includes: a rotating column 311 erected on one side of the rotating plate 11 and rotatably connected to the operating table 1. A third gear 312 is fixedly installed on the outer wall of the rotating column 311. Moreover, a connecting plate 314 parallel to the top wall of the operating table 1 is fixedly connected to the top outer wall of the rotating column 311. The oiling device 32 is arranged on the connecting plate 314. A second motor 315 is also fixedly connected to the bottom wall of the operating table 1, and a fourth gear 313 is fixedly installed on its output end. The third gear 312 and the fourth gear 313 are meshed.

[0035] Further, the third gear 312 is a half gear.

[0036] Further, the oiling device 32 includes: an oil storage tank 321 disposed on the other side of the rotating column 311 relative to the rotating plate 11, an oil storage groove is formed on its top wall, and second electric push rods 322 are fixedly installed on the top walls at both ends of the connecting plate 314. An installation block 323 located below the connecting plate 314 is fixedly connected to the output end of each second electric push rod 322, and a water-absorbing sponge 324 is detachably connected inside the installation block 323.

[0037] Specifically, the water-absorbing sponge 324 can be fixedly installed at the bottom of the installation block 323 by magnetic attraction or bonding. The magnetic attraction method is: a first magnetic member is fixedly installed at the bottom of the installation block 323, and a second magnetic member is fixedly connected to the top wall of the water-absorbing sponge 324. The first magnetic member and the second magnetic member have opposite magnetic polarities and are magnetically adsorbed to each other. Therefore, when the water-absorbing sponge 324 approaches the installation block 323, the first magnetic member will adsorb the second magnetic member to complete the installation of the water-absorbing sponge 324; or the bonding method is: a magic tape rough surface is provided at the bottom of the installation block 323, and a magic tape hook surface is provided on the top wall of the water-absorbing sponge 324. The assembly of the water-absorbing sponge 324 is realized through the connection of the magic tape hook surface and the rough surface.

[0038] The working principle and usage process of the present utility model are as follows:

[0039] The aluminum parts to be processed are sequentially placed in the lower die cavities formed on each lower die 21. Subsequently, the output end of the first motor 124 controls the rotation of the rotating plate 11 through the first gear 125, the second gear 126, and the rotating shaft 123, so that the lower die 21 sequentially passes through the oiling device 32 and the stretching die head 233 and then returns to the original position;

[0040] When the lower die 21 moves to the position of the oiling device 32, the output end of the second electric push rod 322 extends, pushing the water-absorbing sponge 324 full of lubricating oil downward. The water-absorbing sponge 324 contacts the surface of the aluminum part, and the lubricating oil is applied to the surface of the aluminum part as the installation block 323 presses down;

[0041] When the lower die 21 moves below the stretching die head 233, the output end of the first electric push rod 231 extends to push the upper die base 232 downward. The upper die base 232 drives the stretching die head 233 to move downward and extrude the aluminum part so that it enters the lower die cavity, and the stretching and forming of the aluminum part is realized by the cooperation of the stretching die head 233 and the lower die cavity.

[0042] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A press for stretching capacitor aluminum shell, characterized by: include: An operating table (1) on which a rotating plate (11) is rotatably connected; The stretching mechanism (2) comprises: A plurality of lower dies (21) are fixedly mounted on the rotating plate (11) at equal angles, each of the lower dies (21) is provided with a lower die cavity for placing an aluminum part to be processed, and a mounting bracket (22) is also provided on the operating table (1) on one side of the rotating plate (11), and a stretching upper die (23) is movably connected to the mounting bracket (22), and the stretching upper die (23) is used to realize stretching processing of the aluminum part placed in the lower die cavity; and an oiling mechanism (3), which is arranged on the outer wall of the operating table (1) on the other side relative to the mounting bracket (22) and has: A rotating assembly (31) is movably connected to the operating table (1), and an oiling device (32) is provided on the rotating assembly (31). The oiling device (32) is used to implement an oiling operation on the surface of an aluminum part placed in the lower mold cavity.

2. A press machine for stretching an aluminum shell of a capacitor as claimed in claim 1, characterized in that: The mounting bracket (22) comprises: A vertical portion (221) and a horizontal portion (222), wherein the horizontal portion (222) is vertically integrally formed at the top of the horizontal portion (222), and the vertical portion (221) is vertically arranged on the operating table (1), and its bottom end is fixedly connected to the top wall of the operating table (1); The stretching upper die (23) has: A first electric push rod (231) is fixedly mounted on the top of the horizontal portion (222), and an upper die seat (232) is also provided below the horizontal portion (222); the output end of the first electric push rod (231) is fixedly connected to the upper die seat (232), and a stretching die head (233) adapted to the lower die cavity is detachably fixedly mounted on the bottom end of the upper die seat (232).

3. A press machine for stretching an aluminum shell of a capacitor as claimed in claim 1, characterized in that: The bottom of the operating table (1) is also provided with a driving assembly (12) for controlling the horizontal rotation of the rotating plate (11), and the driving assembly (12) has: A support plate (122) is horizontally fixedly connected to the bottom of the operating table (1) through a plurality of support rods (121); a rotating shaft (123) is vertically fixedly connected to the center of the rotating plate (11); the bottom end of the rotating shaft (123) passes through the operating table (1) and is rotatably connected to the support plate (122); A first motor (124) is also fixedly connected to the bottom of the support plate (122), and a first gear (125) is fixedly installed on the output end of the first motor. A second gear (126) is fixedly connected to the outer wall of the rotating shaft (123), and the first gear (125) and the second gear (126) are meshingly connected.

4. A press machine for stretching an aluminum shell of a capacitor as claimed in claim 1, characterized in that: The rotating assembly (31) comprises: A rotating column (311) vertically arranged on one side of the rotating plate (11) and rotatably connected to the operating table (1), a third gear (312) being fixedly mounted on the outer wall of the rotating column (311), and a connecting plate (314) parallel to the top wall of the operating table (1) being fixedly connected to the top outer wall of the rotating column (311), and the oiling device (32) being arranged on the connecting plate (314); A second motor (315) is also fixedly connected to the bottom wall of the operating table (1), and a fourth gear (313) is fixedly mounted on the output end of the second motor. The third gear (312) and the fourth gear (313) are meshed with each other.

5. A press machine for stretching an aluminum shell of a capacitor as claimed in claim 4, characterized in that: The third gear (312) is a half gear.

6. A press machine for stretching an aluminum shell of a capacitor as claimed in claim 4, characterized in that: The oiling device (32) comprises: An oil storage tank (321) is arranged on the other side of the rotating column (311) relative to the rotating plate (11), and an oil storage groove is opened on its top wall, and second electric push rods (322) are fixedly installed on the top walls of both ends of the connecting plate (314), and the output end of each second electric push rod (322) is fixedly connected to a mounting block (323) located below the connecting plate (314), and a water-absorbing sponge (324) is detachably connected to the mounting block (323).

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