Pole piece pressing device

Abstract

The invention relates to the technical field of powder pressure forming, and provides a pole piece pressing device which comprises a press machine, a pressing assembly, a supporting assembly, a lifting assembly, a conveying and positioning assembly and a mold assembly. The pressing assembly is installed in the middle of the lower surface of a driving sliding block of the press machine. A supporting assembly and a lifting assembly are fixedly connected to the upper surface of a base of the press, the supporting assembly and a pressing assembly are oppositely arranged, and the axis of the supporting assembly coincides with the central axis of the pressing assembly; the conveying and positioning assembly penetrates through an opening between a driving sliding block of the press machine and the base and is in sliding connection with the lifting assembly. The mold assemblies are arranged on the conveying and positioning assembly. The conveying and positioning assembly is used for automatically conveying and positioning the mold, the pressing machine is used for automatically pressing, and stripping is automatically completed at the pressing position without secondary pressing of the pole piece; the device has the advantages of being small in occupied area, low in cost, high in universality and high in working efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of powder pressure forming, and in particular relates to a pole piece pressing device. Background Art

[0002] Powder pressed pole pieces offer advantages such as high energy density, uniform thickness, and high material utilization, making them widely used in various high-energy power batteries. Due to their thinness, the current method involves manually placing a pre-processed mold filled with powdered raw material into a press to form the pole piece. A stripping tool is then placed on the mold to release the material, and the mold is manually removed after the material has been stripped, completing the powder pressing process. This method is labor-intensive, inefficient, and unsafe.

[0003] Chinese invention patent CN105514345B discloses a device for preparing ultra-thin thermal battery electrodes, which realizes the pressing and automatic material removal of powder electrodes. However, when pressing, the core of the upper die needs to be accurately inserted into the die cavity for pressing, and the position accuracy of the upper and lower dies is extremely high. Pressing electrodes of similar sizes requires replacing the upper die according to the electrode diameter, which is cumbersome. In addition, when removing the material, the die needs to be taken out separately and placed on another material removal device, which is inefficient. Chinese utility model patent CN208101151U discloses a die-removing device for cold pressing of powder materials, which realizes the pressing and material removal of powder electrodes. The device inserts the upper die core into the lower die cavity for pressing using a guide mechanism, and the position accuracy of the upper and lower dies is extremely high. The structure of the device is relatively complex, and when switching products of similar sizes, the upper die also needs to be replaced, which is cumbersome. When removing the material, the die also needs to be taken out and placed in the material removal position for a second press to complete the material removal, which is inefficient. Furthermore, existing technologies all require a gripping device to rotate and position the mold between different workstations, which increases the footprint of the electrode pressing device and manufacturing costs. To address the shortcomings of existing technologies, this application urgently needs to address how to achieve low-cost, highly versatile, and efficient automatic pressing and material removal of powder electrodes. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a pole piece pressing device, which can realize automatic conveying, positioning, automatic pressing and automatic material return of the mold.

[0005] The specific technical solution adopted in the present invention is: The present invention provides an electrode pressing device, comprising a press, a pressing assembly, a support assembly, a lifting assembly, a conveying and positioning assembly, and a mold assembly; the pressing assembly is installed in the middle position of the lower surface of a driving slider of the press; the upper surface of the base of the press is fixedly connected with the support assembly and the lifting assembly, the support assembly and the pressing assembly are arranged opposite to each other, and the axis thereof coincides with the central axis of the pressing assembly; the conveying and positioning assembly passes through an opening between the driving slider and the base of the press and is slidably connected to the lifting assembly; the mold assembly is arranged on the conveying and positioning assembly.

[0006] Furthermore, the pressing assembly includes a first working pad, an upper pressure head and a material stripping assembly; the upper pressure head is in the shape of a cylindrical step, the bottom surface of the large cylinder is fixedly connected to the center of the lower surface of the first working pad, and the position of the small cylindrical head passes through the material stripping assembly; the material stripping assembly includes a first hydraulic cylinder, a second hydraulic cylinder and a material stripping pressing plate; the first hydraulic cylinder and the second hydraulic cylinder are symmetrically arranged on both sides of the upper pressure head along the width direction of the first working pad, and the two ends of the material stripping pressing plate are respectively fixedly connected with the output shafts of the first hydraulic cylinder and the second hydraulic cylinder through threads.

[0007] Furthermore, the middle part of the material stripping pressure plate is a circular ring structure, a cylindrical through hole is provided in the center of the ring, and a boss is arranged in an array on the lower surface of the circular ring structure; the upper pressure head coincides with the axis of the cylindrical through hole of the material stripping pressure plate, and the small cylinder of the upper pressure head passes through the cylindrical through hole of the material stripping pressure plate and its lower end face is a certain distance lower than the lower surface of the boss.

[0008] Furthermore, the support assembly includes a second working pad and a pad block; the lower surface of the second working pad is fixedly connected to the upper surface of the press base, and the pad block is in the shape of a cylindrical step, and its large cylindrical end face is fixedly connected to the center position of the upper surface of the second working pad, and the upper surface of the small cylinder is provided with a positioning boss, and an arc structure is provided on the upper edge of the positioning boss.

[0009] Furthermore, the lifting assembly includes a power mechanism and a lifting mechanism; the lifting mechanism is fixed to the middle position of the upper surface of the press base, and the power mechanism is fixedly connected to one side of the middle edge of the press base in the width direction, and is in rolling contact with the lifting mechanism; the power mechanism includes a driving mechanism and a connecting rod assembly; the driving mechanism is fixedly connected to the middle position of the side of the press base and is rotatably connected to the connecting rod assembly fixed to the upper surface of the press base; the driving mechanism includes a first fixed plate, a cylinder, and a "Y"-shaped joint; the tail end of the cylinder is fixed to the bottom of the first fixed plate through a support The output shaft end is fixedly connected to the "Y"-shaped joint through a thread; the connecting rod assembly includes a "V"-shaped connecting rod, a fixed seat bearing, a second fixed plate and a follower bearing; the long arm end of the "V"-shaped connecting rod is rotatably connected to the "Y"-shaped joint; there are two fixed seat bearings symmetrically arranged at both ends of the "V"-shaped connecting rod and rotatably connected with the long and short arms of the "V"-shaped connecting rod at the intersection of the long and short arms; one side of the second fixed plate is fixed to the upper surface of the press base, and the other opposite side is fixedly connected to two fixed seat bearings; the follower bearing is fixedly connected to one end of the short arm of the "V"-shaped connecting rod through a thread.

[0010] Furthermore, the lifting mechanism includes a base plate, a buffer, and a guide mechanism; there are two guide mechanisms, which are symmetrically arranged on both sides of the base plate in the width direction; buffers are vertically passed through and fixed at the four corners of the base plate; the guide mechanism includes a fixed vertical plate, a linear guide rail and a connecting plate; the narrow bottom surface of the fixed vertical plate is fixedly connected to the upper surface of the press base, and its side array is provided with three linear guide rails; the back side of the connecting plate is slidably connected to the slider of the linear guide rail, and the lower narrow side surface is fixedly connected to the base plate.

[0011] Furthermore, the conveying positioning assembly includes a line body, a stopper and a sensor; the line body is composed of two conveying rails, the lower surface of which is fixed on the upper surface of the bottom plate of the lifting mechanism, and the stopper and the sensor are adjacently fixed on the inner side of one rail of the line body.

[0012] Furthermore, the mold assembly includes a tray and a mold; a limiting hole is provided in the center of the tray, and the lower end of the mold passes through the limiting hole and is movably placed on the tray.

[0013] Furthermore, the mold includes a base support, a spring, an outer mold sleeve and a mold core; the base support is provided with a mold core placement groove, a spring placement groove, a cylindrical inner cavity and a cylindrical positioning hole; the diameter of the mold core is smaller than the diameter of the small cylinder of the upper pressure head, and the mold core passes through the central circular hole of the outer mold sleeve and is placed in the mold core placement groove of the base support, one end of the spring is placed in the spring placement groove of the base support and the other end contacts the bottom surface of the outer mold sleeve, and the bottom of the outer mold sleeve is arranged in the cylindrical inner cavity of the base support and sunk a certain distance; the thickness of the cylindrical inner cavity is greater than the thickness of the cylindrical cavity formed by the outer mold sleeve and the mold core.

[0014] Furthermore, the diameter of the cylindrical positioning hole matches the diameter of the positioning boss of the pad, and a trumpet-shaped guide structure is provided at the lower portion of the cylindrical positioning hole.

[0015] The beneficial effects of the present invention are: the present invention adopts a conveying and positioning component to automatically convey and position the mold, the press automatically presses, and automatically completes the material removal at the pressing position without the need for secondary pressing of the electrode; it has the advantages of small footprint, low cost, strong versatility and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structural diagram of the present invention; Figure 2 is a structural diagram of a pressing assembly of the present invention; Figure 3 It is a structural diagram of the support assembly of the present invention; Figure 4 It is a structural diagram of the lifting assembly of the present invention; Figure 5 yes Figure 4 Detailed drawing of the power mechanism structure; Figure 6 yes Figure 4 Detailed drawing of the lifting mechanism structure; Figure 7 It is a structural diagram of the conveying and positioning assembly and the mold assembly of the present invention; Figure 8 yes Figure 7 The back structure diagram of the tray of the middle mold assembly; Figure 9 is a cross-sectional structural diagram of the mold assembly of the present invention; Figure 10 yes Figure 7 The bottom support structure diagram of the mold of the mold assembly; Figure 11 This Figure 7 Exploded view of the mold assembly.

[0017] In the figure: 1-press, 2-pressing assembly, 21-first working pad, 22-upper pressure head, 23-material stripping assembly, 231-first hydraulic cylinder, 232-second hydraulic cylinder, 233-material stripping plate, 2331-cylindrical through hole, 2332-boss, 3-support assembly, 31-second working pad, 32-pad, 321-positioning boss, 3211-arc structure, 4-lifting assembly, 41-power mechanism, 411-driving mechanism, 4111-first fixed plate, 4112-cylinder, 4113-"Y" type joint, 412-connecting rod assembly, 4121-"V" type connecting rod, 4122-fixed Seat bearing, 4123-second fixed plate, 4124-follow-up bearing, 42-lifting mechanism, 421-base plate, 422-buffer, 423-guide mechanism, 4231-fixed vertical plate, 4232-linear guide rail, 4233-connecting plate, 5-conveying and positioning assembly, 51-line body, 52-stopper, 53-sensor, 6-mold assembly, 61-tray, 611-limiting hole, 62-mold, 621-bottom support, 6211-mold core placement groove, 6212-spring placement groove, 6213-cylindrical inner cavity, 6214-cylindrical positioning hole, 622-spring, 623-outer mold sleeve, 624-mold core. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0019] The first embodiment of the present invention relates to Figures 1-11 The electrode pressing device shown includes a press 1, a pressing assembly 2, a support assembly 3, a lifting assembly 4, a conveying and positioning assembly 5 and a mold assembly 6; the pressing assembly 2 is installed in the middle position of the lower surface of the driving slider of the press 1; the upper surface of the base of the press 1 is fixedly connected with the support assembly 3 and the lifting assembly 4, the support assembly 3 is arranged opposite to the pressing assembly 2, and its axis coincides with the central axis of the pressing assembly 2; the conveying and positioning assembly 5 passes through the opening between the driving slider and the base of the press 1 and is slidably connected to the lifting assembly 4; the mold assembly 6 is arranged on the conveying and positioning assembly 5; the press 1 is used to provide power for electrode pressing; the pressing assembly 2 is used to press the electrode and automatically return the material after the electrode pressing is completed; the support assembly 3 is mainly used to position and support the mold 62 during the pressing operation; the lifting assembly 4 can realize the separation and combination of the mold 62 of the mold assembly 6 and the tray 61; the conveying and positioning assembly 5 mainly plays the role of caching and conveying and positioning the mold assembly 6 between workstations; the overall structure of the electrode pressing device is simple and compact.

[0020] The second embodiment of the present invention is basically the same as the first embodiment, mainly in that the scheme of the pressing component 2 is optimized. Figure 1 、 Figure 2 and Figures 9-11 As shown, the pressing assembly 2 includes a first working pad 21, an upper pressing head 22 and a material stripping assembly 23; the upper pressing head 22 is in the shape of a cylindrical step, the bottom surface of the large cylinder is fixedly connected to the center of the lower surface of the first working pad 21, and the position of the small cylindrical head passes through the material stripping assembly 23, the material stripping assembly 23 includes a first hydraulic cylinder 231, a second hydraulic cylinder 232 and a material stripping pressing plate 233; the first hydraulic cylinder 231 and the second hydraulic cylinder 232 are symmetrically arranged on both sides of the upper pressing head 22 along the width direction of the first working pad 21, and the material stripping pressing plate The two ends of 233 are respectively connected to the output shafts of the first hydraulic cylinder 231 and the second hydraulic cylinder 232 with threads; the upper pressure head 22 is used to press and form the powder in the cavity formed by the outer mold sleeve 623 and the mold core 624. Since the powder is squeezed against the inner wall of the outer mold sleeve 623 during the pressing process and adheres to the inner wall of the outer mold sleeve 623, it is necessary to use the material stripping plate 233 to press the outer mold sleeve 623 when the upper pressure head 22 has completed the pressing but has not yet left the upper surface of the outer mold sleeve 623 to separate the formed pole piece from the inner wall of the outer mold sleeve 623 to complete a press and stripping operation. The first hydraulic cylinder 231 and the second hydraulic cylinder 232 provide the power required for stripping. At the same time, the two symmetrically arranged hydraulic cylinders can ensure that the outer mold sleeve 623 is evenly stressed to ensure that the pole piece is not damaged during stripping.

[0021] The middle part of the material stripping pressure plate 233 is a circular ring structure, with a cylindrical through hole 2331 provided in the center of the ring, and an array of bosses 2332 on the lower surface of the circular ring structure; the upper pressure head 22 coincides with the axis of the cylindrical through hole 2331 of the material stripping pressure plate 233; in order to ensure that the material stripping pressure plate 233 does not contact the outer mold sleeve 623 during the pressing and forming of the electrode, the small cylinder of the upper pressure head 22 passes through the cylindrical through hole 2331 of the material stripping pressure plate 233 and its lower end face is lower than the lower surface of the boss 2332 by a certain distance, and the boss 2332 is convenient for high-precision processing, ensuring the flatness of the material stripping surface, and at the same time can also reduce the contact area during material stripping and increase the pressure, further ensuring the quality of material stripping.

[0022] The third embodiment of the present invention is basically the same as the first embodiment, mainly in that the support assembly 3 is optimized. Figure 1 、 Figure 3 、 Figure 9As shown, the support assembly 3 includes a second working pad 31 and a pad 32; the lower surface of the second working pad 31 is fixedly connected to the upper surface of the base of the press 1, and the pad 32 is in the shape of a cylindrical step, and its large cylindrical end face is fixedly connected to the center position of the upper surface of the second working pad 31, and the upper surface of the small cylinder is provided with a positioning boss 321, and an arc structure 3211 is provided on the upper edge of the positioning boss 321; the second working pad 31 is mainly used to support the pad 32, and the pad 32 is used to support the mold 62 when the pole piece is pressed, wherein the positioning boss 321 is used to position the mold 62 to ensure that the mold 62 is positioned at the pressure center during pressing, so that no eccentric load is generated, which can improve the uniformity of the force on the pole piece, thereby improving the pressing quality; the arc structure 3211 plays a guiding role to facilitate the insertion of the positioning boss 321 into the cylindrical positioning hole 6214. The fourth embodiment of the present invention is basically the same as the first embodiment, mainly in that the lifting component 4 is optimized. Figure 1 、 Figure 4-11As shown, the lifting assembly 4 includes a power mechanism 41 and a lifting mechanism 42; the lifting mechanism 42 is fixed to the middle position of the upper surface of the base of the press 1, and the power mechanism 41 is fixedly connected to one side of the middle edge of the width direction of the base of the press 1, and is in rolling contact with the lifting mechanism 42; the power mechanism 41 is used to drive the lifting mechanism 42 to move up and down, thereby realizing the up and down movement of the conveying positioning assembly 5 on the lifting mechanism 42, and then realizing the separation and combination of the tray 61 and the mold 62 in the mold assembly 6, ensuring that the tray 61 and the mold 62 are separated during pressing, and the mold is positioned and placed on the pad 32 of the support assembly 3, so that when the mold 62 is pressurized, the conveyor The positioning assembly 5 will not bear pressure. After the pressing is completed, the tray 61 and the mold 62 are combined to transport the mold 62 to the next station. The power mechanism 41 includes a driving mechanism 411 and a connecting rod assembly 412. The driving mechanism 411 is fixedly connected to the middle position of the side of the press 1 base and is rotatably connected to the connecting rod assembly 412 fixed to the upper surface of the press 1 base. The driving mechanism 411 includes a first fixed plate 4111, a cylinder 4112, and a "Y"-shaped joint 4113. The tail end of the cylinder 4112 is fixed to the lower end of the first fixed plate 4111 through a support, and the output shaft end is connected to the "Y"-shaped joint 4113 through a thread. The connecting rod assembly 412 comprises a V-shaped connecting rod 4121, a fixed seat bearing 4122, a second fixed plate 4123 and a follower bearing 4124; the long arm end of the V-shaped connecting rod 4121 is rotatably connected to the Y-shaped joint 4113; the two fixed seat bearings 4122 are symmetrically arranged at both ends of the V-shaped connecting rod 4121 and are rotatably connected at the intersection of the long and short arms of the V-shaped connecting rod 4121 through a rotating shaft; one side of the second fixed plate 4123 is fixed to the upper surface of the base of the press 1, and the other side opposite to it is fixedly connected to two fixed seat bearings 4122; the follower bearing 4124 is fixedly connected to the "V"-shaped connecting rod 4121 by a thread. One end of the short arm of the V"-shaped connecting rod 4121; in the initial position, the cylinder 4112 is in a retracted state, and the lifting mechanism 42 is in a jacked-up state. When the pressing operation is performed, the cylinder 4112 extends to drive the "V"-shaped connecting rod 4121 to swing the lifting mechanism 42 to lower the tray 61 and separate the mold 62, so that the mold 62 is positioned and placed on the pad 32 of the support assembly 3. The "V"-shaped connecting rod drives the short arm to rotate through the long arm to pry the lifting mechanism 42 through the lever to save effort. The driving mechanism 411 and the lifting mechanism 42 are in contact through the follower bearing 4124 to play a floating contact role, which can effectively protect the lifting mechanism 42 from being stuck.

[0023] The lifting mechanism 42 includes a bottom plate 421, a buffer 422, and a guide mechanism 423; there are two guide mechanisms 423, which are symmetrically arranged on both sides of the bottom plate 421 in the width direction; the four corners of the bottom plate 421 are respectively vertically passed downward and fixed with buffers 422; the symmetrical arrangement of the guide mechanisms 423 can make the lifting mechanism 42 move up and down with uniform force and smoother movement; the buffers 422 provide cushioning when the lifting mechanism descends to make the movement more stable, thereby protecting the powder in the front pressing mold 62 from being damaged when the lifting mechanism descends into place. The vibration of the vertical plate 4231 destroys the uniform distribution of the powder; the guiding mechanism 423 includes a fixed vertical plate 4231, a linear guide rail 4232 and a connecting plate 4233; the narrow side bottom surface of the fixed vertical plate 4231 is fixedly connected to the upper surface of the base of the press 1, and its side array is provided with three linear guide rails 4232; the back surface of the connecting plate 4233 is slidably connected to the slider of the linear guide rail 4232, and the lower narrow side surface is fixedly connected to the bottom plate 421; the linear guide rail 4232 starts the guiding function, which is mainly to make the lifting mechanism 42 move up and down smoother.

[0024] The fifth embodiment of the present invention is basically the same as the first embodiment, mainly in that the scheme of the conveying and positioning component 5 is optimized. Figure 1 、 Figure 7 As shown, the conveying and positioning component 5 includes a line body 51, a stopper 52 and a sensor 53; the line body 51 is composed of two conveying rails, the lower surface of which is fixed on the upper surface of the bottom plate 421 of the lifting mechanism 42, and the stopper 52 and the sensor 53 are adjacently fixed on the inner side of one track of the line body 51; the conveying and positioning component 5 conveys the mold assembly 6 through the line body 51, wherein when the sensor 53 senses the mold assembly 6 at the pressing position, the stopper 52 stops the mold assembly 6 to achieve precise positioning of the mold 62.

[0025] The sixth embodiment of the present invention is basically the same as the first embodiment, and is mainly optimized. Figures 1-9 The mold assembly 6 includes a tray 61 and a mold 62; a limiting hole 611 is provided in the center of the tray 61, and the lower end of the mold 62 passes through the limiting hole 611 and is movably placed on the tray 61.

[0026] The mold 62 includes a base 621, a spring 622, an outer mold sleeve 623 and a mold core 624; the base 621 is provided with a mold core placement groove 6211, a spring placement groove 6212, a cylindrical inner cavity 6213 and a cylindrical positioning hole 6214; in order to improve the versatility of the equipment and reduce the time for switching products, the diameter of the mold core 624 is smaller than the diameter of the small cylinder of the upper pressure head 22, so that the upper pressure head 22 does not need to be replaced when producing pole pieces with a smaller diameter than the small cylinder of the upper pressure head 22; the mold core 624 passes through the central circular hole of the outer mold sleeve 623 and is placed in the mold core placement groove 6211 of the base 621, one end of the spring 622 is placed in the spring placement groove 6212 of the base 621 and the other end contacts the bottom surface of the outer mold sleeve 623; in the mold 62 In order to ensure that the outer mold sleeve 623 does not shake in the bottom support 621 during movement, the bottom of the outer mold sleeve 623 is set in the cylindrical inner cavity 6213 of the bottom support 621 and sunk a certain distance; the cavity formed by the mold core 624 and the outer mold sleeve 623 is used to store powder raw materials, and the spring 622 is used to support the outer mold sleeve 623, so that the upper pressure head 22, which is larger than the mold core 624, acts on the upper surface of the outer mold sleeve 623 when pressing down, the spring 622 is compressed, and the outer mold sleeve 623 descends until the upper pressure head 22 presses the powder into thin sheets; the thickness of the cylindrical inner cavity 6213 of the bottom support 621 is greater than the thickness of the cylindrical concave cavity formed by the outer mold sleeve 623 and the mold core 624, ensuring that the outer mold sleeve 623 can still move downward after the powder is formed into pole pieces, reserving sufficient material withdrawal stroke.

[0027] The diameter of the cylindrical positioning hole 6214 matches the diameter of the positioning boss 321 of the pad 32. In order to ensure smooth docking between the cylindrical positioning hole 6214 of the base 621 of the mold 62 and the positioning boss 321, a trumpet-shaped guide structure is provided at the bottom of the cylindrical positioning hole 6214.

[0028] Based on this, a typical working process of the present invention is: When the present invention is implemented, Figure 1-11As shown; first, after the previous process completes the filling and leveling of the powder raw materials of the mold 62, the conveying and positioning component 5 transports the mold assembly 6 to the inside of the press 1, and when the tray 61 of the mold assembly 6 is detected by the sensor 53 on the inside of the wire body 51, the stopper 52 extends to stop the tray 61, and then triggers the cylinder 4112 of the lifting mechanism 42 to extend, and pushes the "V"-shaped connecting rod 4121 to rotate counterclockwise around the axis of the fixed seat bearing 4122 through the "Y"-shaped joint of the output shaft of the cylinder 4112 to a certain angle, so that the lifting mechanism 42 descends; at this time, the mold assembly 6 on the conveying and positioning component 5 also descends with the lifting mechanism 42, when the base 621 of the mold 62 is smoothly docked with the positioning boss 321 of the pad 32 through the cylindrical positioning hole 6214. , the mold 62 falls on the pad 32 of the support assembly 3, and then the conveying and positioning assembly 5 drives the tray 61 to continue to descend until it reaches the descending stroke, thereby realizing the separation of the mold 62 of the mold assembly 6 from the tray 61; then the driving slider of the press 1 drives the upper ram 22 of the pressing assembly 2 to move downward, and the lower surface of the upper ram 22 first contacts the upper surface of the outer die sleeve 623 of the mold 62; the outer die sleeve 623 moves downward under the action of the upper ram 22 until the outer die sleeve 623 and the die core 624 form a cylindrical cavity and the powder raw material is pressed into a thin sheet. At this time, the edge of the powder raw material adheres to the inner wall of the outer die sleeve 623 due to the large extrusion force; after the powder raw material is pressed into a thin sheet, it is supported by the die core 624, and the upper ram 22 cannot continue to descend, but the cylindrical cavity The thickness of the column cavity 6213 is greater than the thickness of the cylindrical cavity formed by the outer mold sleeve 623 and the mold core 624. Therefore, after the powder raw material is pressed into a thin sheet, the outer mold sleeve 623 has not reached the bottom of the cylindrical cavity 6213, and there is still enough material withdrawal stroke; before the upper pressure head 22 is reset upward, the first hydraulic cylinder 231 and the second hydraulic cylinder 232 drive the material withdrawal pressure plate 233 to apply downward pressure to the upper surface of the outer mold sleeve 623. At this time, the spring 622 continues to compress the outer mold sleeve 623 to continue to move downward beyond the thickness of the electrode, and the electrode is released from adhesion. At this time, the electrode is still pressed by the upper pressure head 22, and then the first hydraulic cylinder 231 and the second hydraulic cylinder 232 retract and return to their original position, and the outer mold sleeve 623 is reset under the action of the spring 622, and finally the upper pressure head 22 is moved upward again The pole piece is reset to complete the electrode return, and the pole piece exists in a free state in the cavity formed by the outer mold sleeve 623 and the mold core 624, which is convenient for subsequent removal; then the cylinder 4112 of the lifting mechanism 42 retracts, and the "V"-shaped connecting rod 4121 is pulled clockwise around the axis of the fixed seat bearing 4122 by the "Y"-shaped joint of the output shaft of the cylinder 4112 to reset the lifting mechanism 42. At this time, the tray 61 on the conveying and positioning assembly 5 also rises with the lifting mechanism 42, and then the mold 62 of the mold assembly 6 is combined with the tray 61. After the conveying and positioning assembly 5 is reset, the stopper 52 retracts and returns to its original position, and the mold assembly 6 is released and transported to the processing station of the next process, and the cycle is repeated in sequence to realize automatic pressing, automatic material return and automatic conveying of the pole piece.

[0029] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pole piece pressing device, characterized in that: The invention comprises a press (1), a pressing assembly (2), a support assembly (3), a lifting assembly (4), a conveying and positioning assembly (5) and a die assembly (6); the pressing assembly (2) is mounted at the middle position of the lower surface of the driving slider of the press (1); the upper surface of the base of the press (1) is fixedly connected with the support assembly (3) and the lifting assembly (4); the support assembly (3) and the pressing assembly (2) are arranged opposite to each other, and the axis thereof coincides with the central axis of the pressing assembly (2); the conveying and positioning assembly (5) passes through the opening between the driving slider and the base of the press (1) and is slidably connected to the lifting assembly (4); the die assembly (6) is arranged on the conveying and positioning assembly (5).

2. The pole piece pressing device according to claim 1, characterized in that: The pressing assembly (2) comprises a first working pad (21), an upper pressing head (22) and a material stripping assembly (23); the upper pressing head (22) is in the shape of a cylindrical step, the bottom surface of the large cylinder is fixedly connected to the center of the lower surface of the first working pad (21), and the head of the small cylinder passes through the material stripping assembly (23); the material stripping assembly (23) comprises a first hydraulic cylinder (231), a second hydraulic cylinder (232) and a material stripping pressing plate (233); the first hydraulic cylinder (231) and the second hydraulic cylinder (232) are symmetrically arranged on both sides of the upper pressing head (22) along the width direction of the first working pad (21), and the two ends of the material stripping pressing plate (233) are respectively threadedly fixedly connected to the output shafts of the first hydraulic cylinder (231) and the second hydraulic cylinder (232).

3. The pole piece pressing device according to claim 2, characterized in that: The middle part of the material-removing pressing plate (233) is a circular ring structure, a cylindrical through hole (2331) is provided at the center of the circular ring, and a boss (2332) is arranged in an array on the lower surface of the circular ring structure; the upper pressing head (22) coincides with the axis of the cylindrical through hole (2331) of the material-removing pressing plate (233), and the small cylinder of the upper pressing head (22) passes through the cylindrical through hole (2331) of the material-removing pressing plate (233) and its lower end surface is lower than the lower surface of the boss (2332) by a certain distance.

4. The pole piece pressing device according to claim 1, characterized in that: The support assembly (3) comprises a second working pad (31) and a pad (32); the lower surface of the second working pad (31) is fixedly connected to the upper surface of the press (1) base, and the pad (32) is in the shape of a cylindrical step, with its large cylindrical end surface fixedly connected to the center position of the upper surface of the second working pad (31), and the upper surface of the small cylinder is provided with a positioning boss (321), and an arc structure (3211) is provided on the upper edge of the positioning boss (321).

5. The pole piece pressing device according to claim 4, characterized in that: The lifting assembly (4) includes a power mechanism (41) and a lifting mechanism (42); the lifting mechanism (42) is fixed to the middle position of the upper surface of the press (1) base, and the power mechanism (41) is fixedly connected to one side of the middle edge of the press (1) base in the width direction and is in rolling contact with the lifting mechanism (42); the power mechanism (41) includes a driving mechanism (411) and a connecting rod assembly (412); the driving mechanism (411) is fixedly connected to the middle position of the side of the press (1) base and is rotatably connected to the connecting rod assembly (412) fixed to the upper surface of the press (1) base; the driving mechanism (411) includes a first fixed plate (4111), a cylinder (4112), and a "Y"-shaped joint (4113); the tail end of the cylinder (4112) is fixed to the lower end of the first fixed plate (4111) through a support. The output shaft end is fixedly connected to the "Y"-shaped joint (4113) through a thread; the connecting rod assembly (412) includes a "V"-shaped connecting rod (4121), a fixed seat bearing (4122), a second fixed plate (4123) and a follower bearing (4124); the long arm end of the "V"-shaped connecting rod (4121) is rotatably connected to the "Y"-shaped joint (4113); the fixed seat bearing (4122) is symmetrically arranged at both ends of the "V"-shaped connecting rod (4121) and is rotatably connected to the long and short arms of the "V"-shaped connecting rod (4121) through a rotating shaft; one side of the second fixed plate (4123) is fixed to the upper surface of the base of the press (1), and the other side opposite to it is fixedly connected to the two fixed seat bearings (4122); the follower bearing (4124) is fixedly connected to one end of the short arm of the "V"-shaped connecting rod (4121) through a thread.

6. The pole piece pressing device according to claim 5, characterized in that: The lifting mechanism (42) includes a base plate (421), a buffer (422), and a guide mechanism (423); there are two guide mechanisms (423) symmetrically arranged on both sides of the base plate (421) in the width direction; the four corner positions of the base plate (421) respectively pass vertically downward and are fixed with buffers (422); the guide mechanism (423) includes a fixed vertical plate (4231), a linear guide rail (4232) and a connecting plate (4233); the narrow side bottom surface of the fixed vertical plate (4231) is fixedly connected to the upper surface of the base of the press (1), and three linear guide rails (4232) are arranged in an array on its side; the back surface of the connecting plate (4233) is slidably connected to the slider of the linear guide rail (4232), and the lower narrow side surface is fixedly connected to the base plate (421).

7. The pole piece pressing device according to claim 6, characterized in that: The conveying positioning assembly (5) comprises a line body (51), a stopper (52) and a sensor (53); the line body (51) is composed of two conveying rails, the lower surface of which is fixed to the upper surface of the bottom plate (421) of the lifting mechanism (42), and the stopper (52) and the sensor (53) are adjacently fixed to the inner side surface of one rail of the line body (51).

8. The pole piece pressing device according to claim 1, characterized in that: The mold assembly (6) comprises a tray (61) and a mold (62); a limiting hole (611) is provided at the center of the tray (61), and the lower end of the mold (62) passes through the limiting hole (611) and is movably placed on the tray (61).

9. The pole piece pressing device according to claim 8, characterized in that: The mold (62) comprises a bottom support (621), a spring (622), an outer mold sleeve (623) and a mold core (624); the bottom support (621) is provided with a mold core placement groove (6211), a spring placement groove (6212), a cylindrical inner cavity (6213) and a cylindrical positioning hole (6214); the diameter of the mold core (624) is smaller than the diameter of the small cylinder of the upper pressure head (22), and the mold core (624) passes through the central circular hole of the outer mold sleeve (623) and is placed on the bottom support (621). One end of the spring (622) is placed in the spring placement groove (6212) of the bottom support (621), and the other end contacts the bottom surface of the outer mold sleeve (623). The bottom of the outer mold sleeve (623) is set in the cylindrical inner cavity (6213) of the bottom support (621) and sinks a certain distance. The thickness of the cylindrical inner cavity (6213) is greater than the thickness of the cylindrical cavity formed by the outer mold sleeve (623) and the mold core (624).

10. The pole piece pressing device according to claim 9, characterized in that: The diameter of the cylindrical positioning hole (6214) matches the diameter of the positioning boss (321) of the pad (32), and a trumpet-shaped guide structure is provided at the bottom of the cylindrical positioning hole (6214).

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