Motor core stator-rotor self-adhesive progressive die

Abstract

This invention relates to the field of motor core manufacturing mold technology, and provides a self-adhesive progressive mold for motor core stators and rotors, including a lower mold base and an upper mold base. A stripper plate is installed at the bottom of the upper mold base, and a material track plate is installed at the top of the lower mold base. A movable material strip is provided on the material track plate, and multiple stampable silicon steel sheets are provided on the material strip. Multiple locking ring grooves are provided on the central shaft of the lower mold base. A pressure-bonding air venting assembly is provided outside the locking ring grooves, and a cooling assembly is provided between the locking ring grooves and the pressure-bonding air venting assembly. The pressure-bonding air venting assembly includes an exhaust ring port placed on the upper inner wall of the locking ring groove. In use, this invention integrates pressure-bonding air venting and anti-seepage functions, transforming the sealed groove into a controllable molding cavity with active venting, air-bonding separation, and accumulation alarm, solving the problem of gas trapped in the fully enclosed locking ring groove, forming a bubble layer.

Description

Technical Field

[0001] This invention relates to the field of mold technology for manufacturing motor cores, and more specifically, to a self-adhesive progressive mold for motor core stators and rotors. Background Technology

[0002] The self-adhesive progressive die for motor stators and rotors is a precision forming equipment used to produce motor stators and rotors. This die adopts a progressive die structure, integrating multiple processes such as stamping, lamination, heating, and bonding. It continuously feeds strips pre-coated with a hot-melt self-adhesive coating into the die, and through stamping, lamination stacking, heating to melt the coating, and pressing and curing, it integrally forms a high-precision self-adhesive core. Compared with traditional riveting or welding processes, this die achieves riveting-free and welding-free self-adhesive forming, offering advantages such as high lamination accuracy, good bonding strength, and high production efficiency. It is widely used in the mass production of stators and rotors for new energy vehicles, industrial motors, and household appliances.

[0003] In the field of motor manufacturing, the stator and rotor cores, as the core magnetic circuit components of a motor, are typically made of multiple silicon steel sheets laminated and bonded together. The lamination accuracy, bonding strength, and overall consistency directly determine the motor's energy efficiency, noise, and operational stability. To ensure that the cores are stacked without misalignment or warping and have a uniform magnetic circuit, the industry commonly uses multi-station continuous progressive dies to complete the integrated processing of lamination, positioning, and stacking, achieving high-speed, high-volume, and high-precision production of stator and rotor cores.

[0004] In the continuous progressive die production process of self-adhesive coated iron core, the surface of the strip is pre-coated with a hot-melt self-adhesive coating. After being stamped, the blanks are transported to the locking ring contour groove at the end of the die for positioning. The groove is a fully enclosed contour structure, which can ensure that the blanks are accurately centered and without offset. After the blanks enter the groove, the self-adhesive coating is melted and flowed by electromagnetic heating. Then, the upper die blanking punch applies downward force to press and seal the coating, so that the coating completes the bonding and curing of multiple blanks in a hot state, and finally realizes the integrated self-adhesive molding of the iron core without rivets or welding.

[0005] However, because the locking ring adopts a fully enclosed groove structure, the laminations are in a closed space during heating and pressing. When the self-adhesive coating melts, it releases a small amount of volatile gas. This gas remains in the gap between the laminations. When the upper die blanking punch presses down, it is simultaneously squeezed to the edge of the laminations along with the filling process of the adhesive layer from the inside out. The edge of the fully enclosed groove is a sealed dead zone, and the gas cannot escape outward. In the end, it is encapsulated and sealed at the edge of the laminations by the adhesive before curing, forming a bubble interlayer. This type of bubble will reduce the effective bonding area between the laminations, resulting in a significant lack of bonding strength at the edge of the iron core. During long-term service, the iron core is prone to defects such as micro-delamination and warping from the edge, which in turn affects the overall performance and service life of the motor.

[0006] Therefore, this application proposes a self-adhesive progressive die for motor core stator and rotor to solve the above problems. Summary of the Invention

[0007] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a self-adhesive progressive mold for motor iron core stator and rotor, which solves the problem that under the fully enclosed locking ring groove sealed structure, the self-adhesive coating melts and releases gas, and is squeezed to the sealed dead area at the edge of the laminate as the adhesive layer is pressed and cannot escape, forming a bubble interlayer, which leads to insufficient adhesive strength at the edge of the iron core and easy warping from the edge micro-delamination during long-term service.

[0008] To solve the above technical problems, the present invention provides the following technical solution: a self-adhesive progressive die for motor core stator and rotor, comprising a lower die base and an upper die base, wherein a stripper plate is installed at the bottom of the upper die base, and a material sheet track plate is installed at the top of the lower die base, wherein a movable material strip is provided on the material sheet track plate, and a plurality of stampable silicon steel sheets are provided on the material strip; a plurality of locking ring grooves are provided on the top of the lower die base; a pressure-bonding air exhaust assembly is provided outside the locking ring grooves, and a cooling assembly is provided between the locking ring grooves and the pressure-bonding air exhaust assembly; the pressure-bonding air exhaust assembly includes: an exhaust ring port placed on the upper inner wall of the locking ring groove, and an annular embedding groove opened in the lower die base and located outside the exhaust ring port, wherein an exhaust cylinder is sealed and installed in the annular embedding groove, and a sealing interface communicating with the exhaust ring port is opened on the upper inner wall of the exhaust cylinder.

[0009] In a new embodiment, the exhaust stack is provided with an anti-seepage adhesive assembly, which includes an inclined ventilating ring plate and a collecting ring plate: the inclined ventilating ring plate is installed in the middle of the inner ring wall of the exhaust stack, and the collecting ring plate is installed in the middle of the outer ring wall of the exhaust stack; the inclined ventilating ring plate and the collecting ring plate are connected; a bearing plate is slidably installed inside the collecting ring plate, and a plurality of supporting spring columns are slidably installed at the bottom end of the collecting ring plate; the top end of the supporting spring columns is connected to the bottom end of the bearing plate.

[0010] In a new embodiment, a magnetic block is installed at the bottom of the supporting spring column, and a coil sleeve is provided at the bottom of the magnetic block. The coil sleeve is installed on the outer ring wall of the exhaust pipe. When the weight of the accumulated adhesive particles on the collecting ring plate and the bearing plate reaches a preset value, the supporting spring column is compressed and drives the magnetic block to move towards the coil sleeve, causing the magnetic flux in the coil sleeve to change and generate an induced current.

[0011] In a new embodiment, the cooling assembly includes: a cooling ring surrounding the outside of the locking ring groove, located inside the lower mold base and between the exhaust pipe and the locking ring groove; a coolant inlet connected to one end of the cooling ring; and a coolant outlet connected to the other end of the cooling ring.

[0012] In a new embodiment, a contact ring wall is installed on the inner ring wall of the exhaust pipe, and the contact ring wall is in contact with the outer wall end of the cooling ring.

[0013] In a new embodiment, a lower mold base plate is installed at the bottom end of the lower mold base; a top support plate is slidably installed in the locking ring groove, and a segmented push rod and a reset spring column are connected to the bottom end of the top support plate; the segmented push rod is installed on the top of the lower mold base plate, and the reset spring column is slidably installed on the lower mold base plate; the top support plate is used to descend piece by piece during the silicon steel sheet pressing process to accommodate the silicon steel sheets that fall into the locking ring groove in sequence.

[0014] In a new embodiment, the exhaust ring is opened on the inner wall of the locking ring groove and is located at the joint surface when two adjacent silicon steel sheets are pressed together. In use, the upper mold base drives the unloading plate base to press the silicon steel sheet into the locking ring groove. The adhesive layer between adjacent silicon steel sheets is squeezed outward, squeezing out the gas between the sheets. The gas is discharged through the exhaust ring and exhaust pipe.

[0015] In a new embodiment, the lower part of the exhaust pipe is connected to an air extraction port, and multiple air extraction ports are connected to each other through branch pipes, which are connected to an external air extraction device.

[0016] In a new embodiment, the sheet track plate is provided with an electromagnetic heating component, which includes an electromagnetic coil ring for heating the silicon steel sheet and a heat-insulating ceramic ring sleeved on the outside of the electromagnetic coil ring.

[0017] Beneficial effects: Compared with the prior art, the advantages of the present invention are: 1. This application addresses the problem that gas cannot escape and forms bubble interlayer due to the dead zone of edge sealing in the fully enclosed locking ring groove. By integrating the pressure adhesive air exhaust component and the anti-seepage adhesive component, the sealed groove is transformed into a controllable molding cavity with active air exhaust, air-adhesive separation and accumulation alarm functions, realizing the integrated high-precision molding of the self-adhesive iron core without rivets or welding.

[0018] 2. By setting up a pressure-bonding air exhaust assembly, an exhaust ring is opened in the inner wall of the locking ring groove at the height of the silicon steel sheet joint surface, and the exhaust pipe is connected to the external air extraction device to form an active exhaust channel. When the adhesive layer is squeezed outward, the gas between the sheets is extracted in time along the shortest path, ensuring that the gas is completely discharged before the adhesive layer cures. This solves the problem of gas not being able to escape due to the sealing dead zone at the edge of the fully enclosed groove, avoids the formation of air bubble interlayers, and ensures the bonding strength of the iron core edge.

[0019] 3. By setting up a cooling component and using the contact ring wall to transfer the cooling effect of the cooling ring to the inside of the exhaust pipe: on the one hand, the molten adhesive layer in the locking ring groove is quickly solidified and shaped to prevent the groove from being deformed by heat and affecting the positioning accuracy; on the other hand, the adhesive liquid that seeps into the exhaust pipe is quickly solidified into granules during the entry process to avoid adhesion and blockage, and is also convenient for subsequent collection.

[0020] 4. By setting up an anti-seepage adhesive component, an inclined ventilating ring plate and a support plate are installed inside the exhaust stack. The inclined ventilating ring plate, which is breathable but does not leak adhesive, intercepts the adhesive particles that have solidified by the cooled components, causing them to roll onto the support plate to achieve air-adhesive separation. This solves the problem of adhesive particles entering the external air extraction system with the airflow and causing blockage, and ensures the long-term stable operation of the exhaust system.

[0021] 5. When the weight of the adhesive particles on the support plate reaches the preset threshold, the support spring column is compressed, which drives the magnetic block to approach the coil ring, generating an induced current to trigger an alarm signal. This structure uses mechanical gravity sensing and non-contact electromagnetic signal output to solve the problem of difficulty in real-time monitoring and delayed cleaning of adhesive particle accumulation. In particular, it can provide timely warning of abnormal leakage of adhesive layer, avoid failure of the exhaust system, and provide defect conditions for timely improvement of adhesive layer pressing process. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the disassembled structure of the lower mold base and the upper mold base of the present invention.

[0024] Figure 3 This is a schematic diagram of the positional state of the unloading plate seat according to the present invention.

[0025] Figure 4 This is a front view of the lower mold base and upper mold base in the mold-closing state according to the present invention.

[0026] Figure 5 This is a schematic diagram of the locking ring groove position structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the annular embedded groove position structure of the present invention.

[0028] Figure 7 For the present invention Figure 5 Enlarged view of the structure at point A.

[0029] Figure 8 This is a schematic diagram of the diffusion state of the adhesive layer in this invention.

[0030] Figure 9 This is a schematic diagram of the exhaust stack structure of the present invention.

[0031] Figure 10This is a schematic diagram of the cooling component structure of the present invention.

[0032] Figure 11 This is a schematic diagram of the exhaust ring port and adhesive layer position structure of the present invention.

[0033] Figure 12 This is a schematic diagram of the electromagnetic heating component of the present invention.

[0034] The attached diagram is labeled as follows: 1. Lower mold base; 11. Material track plate; 12. Lower mold bottom plate; 2. Upper mold base; 21. Stripper plate base; 3. Locking ring groove; 31. Top support plate; 32. Segmented top rod; 33. Return spring post; 4. Pressure-bonded air exhaust assembly; 41. Exhaust ring port; 42. Annular embedded groove; 43. Exhaust pipe; 431. Air extraction port; 432. Branch pipe; 44. Sealing port; 45. Contact ring wall; 5. Cooling components; 51. Cooling ring; 52. Coolant inlet; 53. Coolant outlet; 6. Leak-proof adhesive assembly; 61. Inclined ventilated ring plate; 62. Collection ring plate; 63. Bearing plate; 64. Supporting spring column; 65. Magnetic block; 66. Coil ring sleeve; 7. Electromagnetic heating component; 71. Electromagnetic coil ring; 72. Heat-insulating ceramic ring. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] This application provides a self-adhesive progressive mold for motor core stator and rotor, which solves the problem that in a fully enclosed locking ring groove sealed structure, the self-adhesive coating melts and releases gas, which is then squeezed into the sealed dead zone at the edge of the laminate as the adhesive layer is pressed, forming air bubbles that cannot escape. This results in insufficient adhesive strength at the edge of the core and easy warping from the edge during long-term service. In use, by integrating the functions of pressing adhesive air venting and preventing adhesive leakage, the sealed groove is transformed into a controllable molding cavity with active venting, air-adhesive separation, and accumulation alarm, thus solving the problem of gas not being able to escape from the fully enclosed locking ring groove and forming air bubbles.

[0037] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0038] Example 1, please refer to Figures 1-11This application provides a self-adhesive progressive die for a motor core stator and rotor, including a lower die base 1 and an upper die base 2. A stripper plate 21 is installed at the bottom of the upper die base 2, and a material track plate 11 is installed at the top of the lower die base 1. A movable material strip is provided on the material track plate 11, and multiple stampable silicon steel sheets are provided on the material strip. Multiple locking ring grooves 3 are provided on the top of the lower die base 1. A pressure-bonding air exhaust assembly 4 is provided outside the locking ring grooves 3, and a cooling assembly 5 is provided between the locking ring grooves 3 and the pressure-bonding air exhaust assembly 4. The pressure-bonding air exhaust assembly 4 includes: an exhaust ring port 41 placed on the upper inner wall of the locking ring groove 3, and an annular embedding groove 42 opened in the lower die base 1 and located outside the exhaust ring port 41. An exhaust cylinder 43 is sealed and installed in the annular embedding groove 42, and a sealing interface 44 communicating with the exhaust ring port 41 is opened on the upper inner wall of the exhaust cylinder 43.

[0039] In a preferred embodiment of this solution, this application addresses the problem that the gas cannot escape and forms an air bubble layer due to the dead zone at the edge of the fully enclosed locking ring groove 3. By integrating the pressure adhesive air venting component 4 and the anti-seepage adhesive component 6, the sealed locking ring groove 3 is transformed into a controllable molding cavity with active air venting, air-adhesive separation and accumulation alarm functions, thus achieving high-precision integrated molding of the self-adhesive iron core without rivets or welding.

[0040] Specifically, the workflow for the self-adhesive entry mold of the motor core stator and rotor is as follows: First, the mold is divided into upper and lower mold bases 1 and upper mold base 2. The upper mold base 2 is the moving mold, which is fixed on the table of the punch press and performs reciprocating stamping action with the punch press to complete one punch. The lower mold base 1 is the fixed mold, which is fixed on the lower worktable of the punch press and is stationary. The mold is fixed by using mold locking screws or hydraulic mold locking devices. At the same time, the strip is a self-adhesive coated strip, and at least one of its upper and lower surfaces is provided with a layer of self-adhesive coating film. This film is solid at room temperature and melts after heating to achieve automatic adhesion. First, the material strip moves smoothly forward on the material sheet track plate 11, accurately conveying the silicon steel sheet to be stamped to the top of the locking ring groove 3. During the conveying process, the material strip will pass through the electromagnetic heating component 7 in sequence. After the electromagnetic coil ring 71 is energized, it generates an alternating magnetic field, which induces eddy currents in the material strip, causing the material strip to heat up rapidly. This, in turn, drives the pre-coated hot melt self-adhesive coating on the surface to melt from a solid state to a fluid state. The heat-insulating ceramic ring 72 sleeved on the outside of the electromagnetic coil ring 71 can effectively block the heat from dissipating to other parts of the mold, ensuring heating efficiency, while preventing other parts of the mold from being damaged by high temperature, and ensuring that the self-adhesive coating reaches the best melting state. Second, the upper mold base 2 moves downward, driving the unloading plate base 21 to press the silicon steel sheet on the strip, separating the silicon steel sheet from the strip. The separated silicon steel sheet falls into the locking ring groove 3 under the pressing action of the unloading plate base 21 (the locking ring groove 3 is a fully enclosed contour structure used to circumferentially limit the silicon steel sheet), and is placed stably on the top support plate 31. The segmented push rod 32 is set below the top support plate 31. The segmented push rod 32 is slidably installed in the lower mold base 1 and the lower mold base plate 12. Each time a silicon steel sheet falls in, under the pressing force of the upper mold, the top support plate 31 compresses the reset spring column 33 and pushes the segmented push rod 32 to descend synchronously by the thickness of one silicon steel sheet, reserving sufficient space for the next silicon steel sheet to fall in. The reset spring column 33 provides stable buffering force during the pressing process, ensuring that the silicon steel sheets are accurately stacked layer by layer in the locking ring groove 3, avoiding mis-stacking and offset problems. Third, the upper mold base 2 continues to press down, and the adhesive layer between adjacent silicon steel sheets is squeezed outward, squeezing the gas between the sheets outward. Since the exhaust ring 41 is opened on the inner wall of the locking ring groove 3 and is located at the corresponding height of the joint surface of the two adjacent silicon steel sheets, the overflowing gas just enters the exhaust ring 41, enters the exhaust cylinder 43 through the sealing interface 44, and is then sucked out by the external air extraction device through the air extraction interface 431 and the branch pipe 432. This process ensures that the gas between the sheets is extracted in time before the adhesive layer is cured, avoiding the formation of air bubble sandwich in the adhesive layer; Fourth, after pressing and venting are completed, the cooling component 5 begins to cool and solidify the molten adhesive layer that has been pressed. The coolant enters the cooling ring 51 through the coolant inlet 52 and circulates along the cooling ring 51, eventually exiting from the coolant outlet 53. The cooling ring 51 is arranged around the outside of the locking ring groove 3 and is located between the venting cylinder 43 and the locking ring groove 3. It can uniformly cool the silicon steel sheet in the locking ring groove 3, so that the molten adhesive layer can be quickly solidified and shaped, ensuring the bonding strength of the iron core edge. At the same time, the cooling effect of the cooling ring 51 is transferred to the inside of the venting cylinder 43 through the contact ring wall 45, so that the inside of the venting cylinder 43 maintains a low temperature environment. The adhesive entering it begins to cool before dripping and quickly solidifies into granules during the falling process. Fifth, during the gas discharge process, on the one hand, the upper mold base 2 continuously presses down, causing the molten adhesive layer between adjacent silicon steel sheets to be squeezed outward and expand, and some of the adhesive is pushed to the vicinity of the exhaust ring 41; on the other hand, the external air extraction device forms a negative pressure in the exhaust cylinder 43, generating a directional airflow. The self-adhesive liquid in the molten state may be carried into the exhaust cylinder 43 under the dual action of the impact pressure and the airflow. At this time, the anti-seepage adhesive component 6 in the exhaust cylinder 43 begins to play its role. The inclined ventilated ring plate 61 allows the gas to pass through smoothly, while effectively blocking the adhesive particles formed after being cooled and solidified by the above-mentioned cooling component 5. The particles roll down along the inclined ventilated ring plate 61 onto the bearing plate 63 of the collection ring plate 62, realizing gas-adhesive separation and preventing the solidified adhesive particles from entering the external air extraction system and causing blockage. Simultaneously, as the production process continues, when the weight of the adhesive particles on the support plate 63 reaches a preset value, it presses down on the support spring column 64, compressing the support spring column 64 and causing the support plate 63 to move downwards. This, in turn, causes the magnetic block 65 installed at the bottom to move towards the coil sleeve 66. The movement of the magnetic block 65 causes a change in the magnetic flux within the coil sleeve 66, thereby generating an induced current and triggering an externally connected alarm signal. This prompts the operator to remove the exhaust pipe 43 and promptly clean the adhesive particles on the support plate 63 to ensure the normal operation of the mold. Sixth, finally, under the action of the external drive, the segmented push rod 32 pushes the top support plate 31 upward, and smoothly pushes the stack of formed iron cores out of the locking ring groove 3, completing the complete forming process of one iron core. Then, the segmented push rod 32 resets, and the top support plate 31 returns to the initial position accurately under the elastic force of the reset spring column 33. The material strip continues to be conveyed forward and enters the next round of silicon steel sheet stamping, stacking and forming process, realizing the continuous automated production of motor iron cores.

[0041] In this embodiment, please refer to Figures 7-11 As shown, the exhaust stack 43 is equipped with an anti-seepage adhesive assembly 6, which includes an inclined ventilating ring plate 61 and a collecting ring plate 62. The inclined ventilating ring plate 61 is installed in the middle of the inner ring wall of the exhaust stack 43, and the collecting ring plate 62 is installed in the middle of the outer ring wall of the exhaust stack 43. The inclined ventilating ring plate 61 and the collecting ring plate 62 are connected. A bearing plate 63 is slidably installed in the collecting ring plate 62, and a plurality of supporting spring columns 64 are slidably installed at the bottom end of the collecting ring plate 62. The top end of the supporting spring column 64 is connected to the bottom end of the bearing plate 63.

[0042] Further, in this embodiment, please refer to Figure 7 and Figure 11 As shown, a magnetic block 65 is installed at the bottom of the supporting spring column 64, and a coil sleeve 66 is provided at the bottom of the magnetic block 65. The coil sleeve 66 is installed on the outer ring wall of the exhaust pipe 43. When the weight of the accumulated adhesive particles on the collecting ring plate 62 and the bearing plate 63 reaches a preset value, the supporting spring column 64 is compressed and drives the magnetic block 65 to move towards the coil sleeve 66, causing the magnetic flux in the coil sleeve 66 to change and generate an induced current.

[0043] In the preferred embodiment of this solution, by setting up an inclined permeable ring plate 61, a collecting ring plate 62, a supporting plate 63, a supporting spring column 64, a magnetic block 65, and a coil sleeve 66, when a negative pressure airflow is introduced into the exhaust stack 43, the gas-adhesive mixture is efficiently separated by the inclined permeable ring plate 61, allowing the gas to pass smoothly. The adhesive particles that have cooled and solidified are intercepted and roll down along the inclined permeable ring plate 61 onto the supporting plate 63, preventing the adhesive from entering the external air extraction device with the airflow. As the production process continues, the weight of the adhesive particles accumulated on the supporting plate 63 gradually increases. When it reaches a preset threshold, the supporting plate 63 overcomes the elastic force of the supporting spring column 64 and moves downward, causing the magnetic block 65 to move downward. This causes the magnetic block 65 to move closer to the coil sleeve 66, causing a sudden change in the magnetic flux within the coil sleeve 66 and generating an induced current, triggering the externally electrically connected controller and activating an alarm signal. Through the physical interception and rolling guidance of the inclined vent ring plate 61, the gas-glue separation achieves consumable-free and maintenance-free operation. At the same time, through the gravity-sensing accumulation detection mechanism composed of the bearing plate 63 and the supporting spring column 64, combined with the non-contact signal triggering of the magnetic block 65 and the coil ring 66, the accumulation of glue particles is automatically sensed and alarmed in real time. In particular, when abnormal glue leakage occurs and a large amount of glue enters the exhaust pipe 43, the weight change of the bearing plate 63 is sensitive, which can promptly reflect the abnormal state and trigger the alarm, effectively avoiding exhaust system failure or mold failure due to excessive glue accumulation. In addition, the detection structure adopts pure mechanical gravity sensing and electromagnetic induction non-contact signal output, which can adapt to the high temperature, high humidity and glue-containing environment inside the exhaust pipe 43, providing a guarantee for the long-term continuous and stable operation of the mold.

[0044] In this embodiment, please refer to Figure 5 and Figure 10 As shown, the cooling assembly 5 includes: a cooling ring 51, which is arranged around the outside of the locking ring groove 3, located inside the lower mold base 1 and between the exhaust pipe 43 and the locking ring groove 3; a coolant inlet 52, which is connected to one end of the cooling ring 51; and a coolant outlet 53, which is connected to the other end of the cooling ring 51.

[0045] Further, in this embodiment, please refer to Figure 7 and Figure 11 As shown, a contact ring wall 45 is installed on the inner ring wall of the exhaust pipe 43, and the contact ring wall 45 is in contact with the outer wall end of the cooling ring 51.

[0046] In a preferred embodiment of this solution, by setting a cooling ring 51, a coolant inlet 52, and a coolant outlet 53, the coolant enters the cooling ring 51 through the coolant inlet 52, circulates along the cooling ring 51, and is discharged from the coolant outlet 53. During the flow, it continuously carries away the heat from the locking ring groove 3 area. Since the cooling ring 51 is arranged around the outside of the locking ring groove 3, it can uniformly cool the silicon steel sheets stacked in the groove in a circumferential direction. At the same time, the cooling ring 51 is located between the exhaust pipe 43 and the locking ring groove 3, and its cooling effect is transferred to the inside of the exhaust pipe 43 through the contact ring wall 45, so that the inside of the exhaust pipe 43 maintains a low temperature environment. Secondly, the cooling ring 51 and the exhaust pipe 43 form a diffusion path through the contact ring wall 45, which simultaneously transmits the cooling effect to the interior of the exhaust pipe 43, so that the curing of the main adhesive layer and the cooling of the exhaust pipe 43 are combined into one, eliminating the need for additional cooling devices. Moreover, the low temperature environment inside the exhaust pipe 43 causes the molten adhesive to begin cooling before dripping and to quickly solidify into granules during the fall, effectively preventing the adhesive from sticking to the inner wall of the exhaust pipe 43 or flowing into the external air extraction system and causing blockage. This creates favorable conditions for the long-term stable operation of the anti-seepage adhesive component 6.

[0047] In this embodiment, please refer to Figure 5 As shown, a lower mold base plate 12 is installed at the bottom of the lower mold base 1; a top support plate 31 is slidably installed in the locking ring groove 3, and a segmented push rod 32 and a reset spring column 33 are connected to the bottom of the top support plate 31; the segmented push rod 32 is installed on the top of the lower mold base plate 12, and the reset spring column 33 is slidably installed on the lower mold base plate 12; the top support plate 31 is used to descend piece by piece during the silicon steel sheet pressing process to accommodate the silicon steel sheets that fall into the locking ring groove 3 in sequence.

[0048] In the preferred embodiment of this solution, by setting a top support plate 31, segmented push rods 32, and a return spring post 33, the stamped silicon steel sheets fall sequentially into the locking ring groove 3 and are stacked on the top support plate 31. Each time a silicon steel sheet falls in, under the combined force of the upper die, the top support plate 31 compresses the return spring post 33 and pushes the segmented push rod 32 to descend synchronously by the thickness of one silicon steel sheet, reserving sufficient space for the subsequent silicon steel sheets to fall in. When the silicon steel sheets are stacked to a set number and have completed bonding and curing, the segmented push rod 32 pushes the top support plate 31 upward, pushing the formed iron core out of the locking ring groove 3. Then the segmented push rod 32 resets, and the top support plate 31 accurately returns to its initial position under the elastic force of the return spring post 33. Through the coordinated operation of the segmented top rod 32 and the reset spring column 33, the top support plate 31 is accurately lowered piece by piece during the stamping process. The thickness of each silicon steel sheet is lowered to be consistent with the actual thickness of the silicon steel sheet, ensuring that the locking ring groove 3 always reserves precise space for subsequent stamping. Structurally, this ensures the precise stacking of silicon steel sheets layer by layer in the groove, effectively avoiding the problems of mis-stacking and offset.

[0049] In this embodiment, please refer to Figure 11 As shown, the exhaust ring port 41 is opened on the inner wall of the locking ring groove 3 and is located at the joint surface when two adjacent silicon steel sheets are pressed together. In use, the upper mold base 2 drives the unloading plate base 21 to press the silicon steel sheet into the locking ring groove 3. The adhesive layer between adjacent silicon steel sheets is squeezed outward, squeezing out the gas between the sheets. The gas is discharged through the exhaust ring port 41 and the exhaust pipe 43.

[0050] In the preferred embodiment of this solution, by setting an exhaust ring port 41, the upper mold base 2 drives the unloading plate base 21 to press the silicon steel sheet into the locking ring groove 3. The upper mold base 2 continues to press down, causing the adhesive layer between adjacent silicon steel sheets to be squeezed outward and expand. The gas between the sheets is squeezed outward. Since the exhaust ring port 41 is opened at the corresponding height of the joint surface, the overflowing gas just enters the exhaust ring port 41 and is discharged through the exhaust pipe 43. By precisely opening the exhaust ring port 41 at the joint surface of adjacent silicon steel sheets, the exhaust path and the gas overflow path are matched to the shortest possible value. This allows the gas between the sheets to enter the exhaust ring port 41 the moment it overflows under pressure, without having to pass through other areas. This effectively avoids the gas from being trapped in the adhesive layer or being discharged in a roundabout way, and structurally ensures the timeliness and thoroughness of the exhaust. Secondly, the exhaust ring 41 is integrated into the inner wall of the locking ring groove 3 and is integrated with the fully enclosed contour positioning structure. There is no need to add an extra exhaust component or occupy mold space. While ensuring the precise alignment of the silicon steel sheet, the exhaust function is embedded and integrated, simplifying the mold structure.

[0051] In this embodiment, please refer to Figure 9 As shown, the lower part of the exhaust pipe 43 is connected to an air extraction port 431, and multiple air extraction ports 431 are connected to each other through branch pipes 432, which are connected to an external air extraction device.

[0052] In the preferred embodiment of this solution, by setting up an air extraction port 431 and a branch pipe 432, after the external air extraction device is started, the branch pipe 432 and multiple air extraction ports 431 are used to simultaneously extract each exhaust pipe 43, so that each locking ring groove 3 area forms an independent negative pressure environment, and the inter-plate gas generated at each workstation is extracted in time. By connecting multiple air extraction ports 431 and branch pipes 432 in parallel, synchronous air extraction at multiple workstations is achieved, ensuring that the exhaust pressure in each locking ring groove 3 remains consistent, avoiding incomplete exhaust in some areas due to uneven air extraction between workstations, and ensuring the balance and consistency of exhaust at each workstation from a system perspective. Meanwhile, the air extraction port 431 is located at the lower part of the exhaust pipe 43, so that the airflow direction and the direction of adhesive dripping form a reasonable air path, avoiding secondary disturbance to the dripping adhesive during air extraction. At the same time, it is conducive to forming a stable negative pressure field in the exhaust pipe 43, improving the gas discharge efficiency, and creating stable airflow conditions for the gas-adhesive separation of the anti-seepage adhesive component 6.

[0053] In this embodiment, reference Figure 5 and Figure 12 The material track plate 11 is provided with an electromagnetic heating component 7, which includes an electromagnetic coil ring 71 for heating silicon steel sheets and a heat-insulating ceramic ring 72 sleeved on the outside of the electromagnetic coil ring 71.

[0054] In a preferred embodiment of this scheme, the electromagnetic heating component 7 is arranged above or to the side of the material track plate 11 and is set along the material conveying path. The electromagnetic coil ring 71 is made of annular copper tube. After being energized, it generates a high-frequency alternating magnetic field. When the material strip with a self-adhesive coating on its surface passes under the electromagnetic coil ring 71, the alternating magnetic field induces eddy currents in the material strip, causing the material strip to heat up rapidly. The heat is then conducted to the self-adhesive coating on its surface, causing the coating to change from a solid state at room temperature to a molten state. Secondly, the heat-insulating ceramic ring 72 is sleeved on the outside of the electromagnetic coil ring 71 and is made of high-temperature resistant ceramic material. It is used to block the heat generated by the electromagnetic coil ring 71 from being transferred to other parts of the mold, and to prevent the upper mold base 2, lower mold base 1 and surrounding structures from rising in temperature due to heat radiation or heat conduction. This ensures that the heating energy is concentrated in the strip area, improves heating efficiency, and at the same time protects the mold body and precision mating parts from the effects of heat deformation, ensuring stamping accuracy. The electromagnetic heating component 7 adopts a non-contact heating method, which has fast heating speed, uniform temperature, and high control precision. It can achieve instantaneous and uniform melting of the self-adhesive coating, providing stable process conditions for subsequent pressing and bonding. In addition, by adjusting the frequency and power of the current of the electromagnetic coil ring 71, it can flexibly adapt to silicon steel sheets of different thicknesses and materials and self-adhesive coatings of different melting temperatures, meeting the production needs of motor cores of various specifications.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-adhesive progressive die for a motor core stator and rotor, comprising a lower die base (1) and an upper die base (2), wherein a stripper plate base (21) is installed at the bottom of the upper die base (2), and a sheet track plate (11) is installed at the top of the lower die base (1), wherein a movable strip is provided on the strip, and a plurality of stampable silicon steel sheets are provided on the strip; characterized in that: The lower mold base (1) is provided with multiple locking ring grooves (3) on its top. The locking ring groove (3) is provided with a pressure-bonding air exhaust assembly (4) outside, and a cooling assembly (5) is provided between the locking ring groove (3) and the pressure-bonding air exhaust assembly (4). The pressure bonding air exhaust assembly (4) includes: An exhaust ring port (41) is placed on the upper inner wall of the locking ring groove (3), and an annular embedding groove (42) is opened in the lower mold base (1) and located outside the exhaust ring port (41). An exhaust cylinder (43) is sealed and installed in the annular embedding groove (42). A sealing interface (44) communicating with the exhaust ring port (41) is opened on the upper inner wall of the exhaust cylinder (43).

2. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The exhaust stack (43) is equipped with an anti-seepage adhesive assembly (6), which includes an inclined permeable ring plate (61) and a collection ring plate (62). An inclined permeable ring plate (61) is installed in the middle of the inner ring wall of the exhaust pipe (43), and a collecting ring plate (62) is installed in the middle of the outer ring wall of the exhaust pipe (43). The inclined permeable ring plate (61) and the collecting ring plate (62) are connected. A bearing plate (63) is slidably installed inside the collecting ring plate (62), and a plurality of supporting spring columns (64) are slidably installed at the bottom end of the collecting ring plate (62), with the top end of the supporting spring column (64) connected to the bottom end of the bearing plate (63).

3. The self-adhesive progressive die for motor core stator and rotor as described in claim 2, characterized in that, A magnetic block (65) is installed at the bottom of the supporting spring column (64), and a coil ring (66) is provided at the bottom of the magnetic block (65). The coil ring (66) is installed on the outer ring wall of the exhaust pipe (43). When the weight of the accumulated adhesive particles on the collecting ring plate (62) and the bearing plate (63) reaches the preset value, the supporting spring column (64) is compressed and drives the magnetic block (65) to move towards the coil ring (66), causing the magnetic flux in the coil ring (66) to change and generate an induced current.

4. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The cooling assembly (5) includes: Cooling ring (51) is arranged around the outside of locking ring groove (3), located inside the lower mold base (1) and between exhaust pipe (43) and locking ring groove (3); A coolant inlet (52) is connected to one end of the cooling ring (51); Coolant outlet (53) is connected to the other end of the cooling ring (51).

5. The self-adhesive progressive die for motor core stator and rotor as described in claim 4, characterized in that, A contact ring wall (45) is installed on the inner ring wall of the exhaust pipe (43), and the contact ring wall (45) is in contact with the outer wall end of the cooling ring (51).

6. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The lower mold base (1) is equipped with a lower mold base plate (12) at its bottom end. A top support plate (31) is slidably installed in the locking ring groove (3), and a segmented top rod (32) and a reset spring column (33) are connected to the bottom end of the top support plate (31). The segmented push rod (32) is installed on the top of the lower mold base plate (12), and the reset spring column (33) is slidably installed on the lower mold base plate (12); The top support plate (31) is used to descend piece by piece during the pressing of silicon steel sheets to accommodate the silicon steel sheets that fall into the locking ring groove (3) in sequence.

7. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The exhaust ring port (41) is opened on the inner wall of the locking ring groove (3) and is located at the joint surface when two adjacent silicon steel sheets are pressed together; When in use, the upper mold base (2) drives the unloading plate base (21) to press the silicon steel sheet into the locking ring groove (3). The adhesive layer between adjacent silicon steel sheets is squeezed outward, squeezing out the gas between the sheets. The gas is discharged through the exhaust ring port (41) and the exhaust pipe (43).

8. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The lower part of the exhaust pipe (43) is connected to an air extraction port (431), and multiple air extraction ports (431) are connected to each other through a branch pipe (432), which is connected to an external air extraction device.

9. The self-adhesive progressive die for motor core stator and rotor as described in claim 1, characterized in that, The material track plate (11) is provided with an electromagnetic heating component (7), which includes an electromagnetic coil ring (71) for heating silicon steel sheets and a heat-insulating ceramic ring (72) sleeved on the outside of the electromagnetic coil ring (71).

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