Die tool for preparing heat dissipation copper plate of IGBT (insulated gate bipolar transistor) module

Abstract

The invention discloses a mold tool for preparing a heat dissipation copper plate of an IGBT (Insulated Gate Bipolar Translator) module, which relates to the field of preparation of needle type heat dissipation copper plates and comprises a base plate, a bearing and moving part arranged on the base plate, and a forming device and a demolding device which are sequentially arranged at the top of the base plate and stretch across the bearing and moving part, and a plurality of needle-shaped structure forming plates which are sequentially overlapped from top to bottom are arranged at the execution end of the bearing moving part. According to the mold tool, in the rough blank copper plate forming process, low-pressure extrusion forming of a metal copper plate is achieved through the forming device, slitting treatment of an overlong needle-shaped structure is achieved through the needle-shaped structure trimming device, and the multiple stacked needle-shaped structure forming plates can be independently unloaded through the demolding device; the influence on the needle-shaped structure during demolding of the needle-shaped structure forming plate is effectively reduced, meanwhile, the demolding device can repeatedly bend the copper plate flash structure while removing the needle-shaped structure forming plate, metal fatigue can be conveniently generated at the contact position of the flash and the copper plate, and follow-up removal of the flash is facilitated.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of preparation of pin-type heat dissipation copper plates, and specifically relates to a mold tooling for preparation of heat dissipation copper plates for IGBT modules. Background Art

[0002] The needle-type heat dissipation copper plate can carry silicon carbide chips. The heat generated by the silicon carbide chips can be discharged through the needle-type heat dissipation copper plate. The unique needle-shaped structure of the needle-type heat dissipation copper plate can achieve efficient contact between the copper plate and the heat dissipation medium to achieve efficient heat dissipation. When preparing the needle-type heat dissipation copper plate, the needle-shaped structure of the copper plate is a difficult point in the preparation.

[0003] The existing mold for a pin-type heat dissipation copper plate includes a panel with a fixing groove extending through the panel along a first direction, and tool slots along a second direction around the panel; and a core assembly comprising an upper core and a lower core assembled together. The existing cold forging process for a pin-type heat dissipation substrate integrates the original forging and punching processes. By modifying the core assembly structure, the pin-type heat dissipation substrate can be processed using a single mold. This product can avoid the problem of pin column deformation caused by demolding due to uneven pin height, thereby improving the overall heat dissipation efficiency and operational reliability of power modules in the new energy vehicle field.

[0004] The products in the existing technology can avoid the problem of needle column deformation caused by demoulding when the product needles are uneven, but it is not convenient to use the demoulding process to pre-treat the copper plate flash and reduce the difficulty of subsequent flash processing. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a mold tooling for preparing an IGBT module heat dissipation copper plate to solve the technical problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mold tool for preparing an IGBT module heat dissipation copper plate, comprising a base plate, a load-bearing movable component disposed on the base plate, and a forming device and a demolding device sequentially disposed on top of the base plate and spanning the load-bearing movable component, wherein the executing end of the load-bearing movable component is provided with a plurality of needle-shaped structure forming plates sequentially stacked from top to bottom; The forming device includes two first support plates symmetrically arranged on the top of the base plate with the bearing movable member as the axis, a flash-reducing copper plate forming component arranged between the two first support plates, and a hydraulic extruder located above the flash-reducing copper plate forming component; The demoulding device includes two second support plates symmetrically arranged on the top of the base plate with the supporting moving part as the axis, a positioning ring arranged between the two second support plates, a copper plate clamping part embedded in the bottom of the positioning ring, a burr clamping part located at the top of the positioning ring, a forming plate clamping part located at the bottom of the positioning ring, and a pneumatic lifting part passing through the positioning ring, the top of the pneumatic lifting part is connected to the burr clamping part, and the bottom of the pneumatic lifting part is connected to the forming plate clamping part, and the pneumatic lifting part is used to simultaneously drive the burr clamping part and the forming plate clamping part to rise and fall, so as to realize the unloading of the needle-shaped structure forming plate while repeatedly bending the copper plate burr.

[0007] Preferably, the burr clamping component includes an annular positioning box, a toothed wall ring rotatably connected to the inner wall of the annular positioning box, a reducer provided at the top of the annular positioning box, a driving motor provided at the top of the annular positioning box and having its output end connected to the input end of the reducer, a driving gear provided at the output end of the reducer and meshing with the toothed wall ring, and a clamping block provided in an annular array at the top of the annular positioning box and slidably connected to the annular positioning box, the bottom of the clamping block being threadedly connected to the top of the toothed wall ring, and the forming plate clamping component having the same structure as the burr clamping component. In this preferred embodiment, the burr of the copper plate is stably clamped by the burr clamping component, and the forming plate clamping component is stably clamped by the forming plate forming plate.

[0008] Preferably, the end of the clamping block in the flash clamping component is provided with a first vertical plate, the bottom of the first vertical plate is provided with an L-shaped limit block, and the end of the clamping block in the forming plate clamping component is provided with a second vertical plate, the top of the second vertical plate is provided with a horizontal clamping plate. In this preferred embodiment, the L-shaped limit block is used to achieve clamping and driving during the bending of the copper plate flash, and the horizontal clamping plate is used to achieve stable clamping of the single-piece needle-shaped structure forming plate.

[0009] Preferably, the pneumatic lifting component includes a plurality of guide posts that penetrate the positioning ring and are distributed in an annular array, two support airbags symmetrically arranged at the top and bottom of the positioning ring and sleeved on the outside of the guide posts, an air source tube with one end connected to the support airbags, and a camera arranged at the top of the annular positioning box in the forming plate clamping component, the top of the guide posts being connected to the bottom of the annular positioning box in the burr clamping component, and the bottom of the guide posts being connected to the top of the annular positioning box in the forming plate clamping component. In this preferred embodiment, the pneumatic lifting component is used to achieve simultaneous and stable lifting of the burr clamping component and the forming plate clamping component.

[0010] Preferably, the copper plate clamping component includes a plurality of drive cylinders embedded in a circular array at the bottom of the positioning ring, and a stop block provided at the actuating end of the drive cylinder. In this preferred embodiment, the copper plate is stably fixed by the copper plate clamping component.

[0011] Preferably, the flash-reducing copper plate forming component includes a lifting plate disposed between the two first support plates, a power cylinder disposed at the bottom of the first support plates with its actuating end extending through the first support plates and connected to the bottom of the lifting plate, a square through-hole cavity plate with its top connected to the bottom of the lifting plate, a plurality of flash grooves embedded in the bottom of the square through-hole cavity plate, and a side-draw assembly disposed on the outer wall of the square through-hole cavity plate and corresponding to the positions of the flash grooves. In this preferred embodiment, the flash groove structure design in the flash-reducing copper plate forming component increases the space for metal extrusion flow, thereby reducing the pressure required for forming the rough copper plate.

[0012] Preferably, the side-drawing assembly includes a side-drawing slide groove embedded in the bottom of the square through-hole cavity plate and connected to the flash groove at one end and the outer wall of the square through-hole cavity plate at the other end, a side-drawing block slidably connected to the side-drawing slide groove, two springs symmetrically embedded in the outer wall of the square through-hole cavity plate and used to give thrust to the side-drawing block, an inclined boss provided on the outer wall of the side-drawing block, an annular drive plate sleeved on the outside of the square through-hole cavity plate, a plurality of telescopic cylinders provided on the top of the lifting plate and used to drive the annular drive plate to rise and fall, and an inclined groove embedded in the bottom of the annular drive plate and corresponding to the position of the inclined boss. In this preferred embodiment, the side-drawing assembly facilitates the elimination of the abutting friction between the flash of the copper plate and the square through-hole cavity plate, making it easier for the copper plate to be removed from the forming device.

[0013] Preferably, the molding machine further includes a needle-shaped structure trimming device disposed on the base plate and located at the bottom of the molding machine. The needle-shaped structure trimming device includes a support plate disposed on the top of the base plate, a square through-hole extending vertically through the support plate, two first linear modules symmetrically disposed on the inner wall of the square through-hole, a movable plate with two ends connected to the actuating ends of the two first linear modules, a micro-electric cylinder disposed at the bottom of the movable plate with its actuating end extending through the movable plate, and a hydraulic cutting component disposed at the actuating end of the micro-electric cylinder. In this preferred embodiment, the needle-shaped structure trimming device is used to trim overlong needle-shaped structures, and the needle-shaped structures are trimmed row by row, thereby increasing the precision of the trimming of the needle-shaped structures.

[0014] Preferably, the hydraulic slitting component includes a positioning frame disposed at the actuator end of the micro-electric cylinder, two micro-hydraulic cylinders symmetrically disposed at both ends of the positioning frame, and an L-shaped slitting blade connected to the two micro-hydraulic cylinder actuator ends at both ends. In this preferred embodiment, the hydraulic slitting component achieves stable slitting of overlong needle-like structures.

[0015] Preferably, the load-bearing moving component includes two second linear modules symmetrically arranged on the top of the base plate, a hydraulic cylinder arranged at the actuating end of the second linear module, and a load-bearing frame arranged at the actuating end of the hydraulic cylinder. In this preferred embodiment, the load-bearing moving component realizes the stable movement of the needle-shaped structure forming plate.

[0016] In summary, the present invention mainly has the following beneficial effects: The mold tooling of the present invention realizes low-pressure extrusion molding of the metal copper plate through the molding device during the forming process of the rough copper plate, and realizes the slitting processing of the overlong needle-shaped structure through the needle-shaped structure trimming device. The demoulding device can unload the multiple needle-shaped structure forming plates arranged in a stacked manner separately, which can effectively reduce the demoulding force and effectively reduce the impact of the needle-shaped structure forming plates on the needle-shaped structure when demoulding. At the same time, the demoulding device can repeatedly bend the copper plate flash structure while removing the needle-shaped structure forming plates, so as to facilitate metal fatigue at the contact part between the flash and the copper plate, and facilitate the subsequent removal of the flash. The stable movement of the needle-shaped structure forming plate is achieved by carrying the moving parts; The flash-reducing copper plate forming component in the forming device increases the space for metal extrusion flow through the flash groove structure design, reduces the pressure required for forming the rough copper plate, and eliminates the friction between the copper plate flash and the square through-hole cavity plate through the side withdrawal component, making it easier for the copper plate to escape from the forming device. In the demoulding device, the copper plate is stably fixed by the copper plate clamping component, the copper plate flash is stably clamped by the flash clamping component, the needle-shaped structure forming plate is stably clamped by the forming plate clamping component, the copper plate flash is clamped and driven during bending by the L-shaped limit block, the single-piece needle-shaped structure forming plate is stably clamped by the horizontal clamping plate, and the flash clamping component and the forming plate clamping component are stably lifted and lowered simultaneously by the pneumatic lifting component; The needle structure trimming device is used to achieve slitting and trimming of overlong needle structures, and the needle structure is trimmed row by row, which increases the fineness of the needle structure trimming. The hydraulic slitting component is used to achieve stable slitting of overlong needle structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric view of the overall structure of the mold tooling of the present invention; Figure 2 This is an exploded view of the overall structure of the mold tooling of the present invention; Figure 3 This is an exploded view of the needle-shaped structure trimming device of the present invention; Figure 4 This is an exploded view of the structure of the flash-reducing copper plate forming component of the present invention; Figure 5An exploded view of the demoulding device structure of the present invention; Figure 6 A top view of the overall structure of the mold tooling of the present invention; Figure 7 This is a cross-sectional view of the overall structure of the mold tooling of the present invention; Figure 8 It is a cross-sectional view of the molding device structure of the present invention; Figure 9 This is an enlarged view of the structure at point A of the present invention; Figure 10 It is an enlarged view of the structure at B of the present invention.

[0018] Description of the drawings: 10, base plate; 11, bearing moving part; 111, second linear module; 112, hydraulic cylinder; 113, bearing frame; 12, needle-shaped structure forming plate; 20, forming device; 21, first support plate; 22, flash decompression copper plate forming component; 221, lifting plate; 222, power cylinder; 223, square through-hole cavity plate; 224, flash groove; 225, side withdrawal assembly; 2251, side withdrawal slide; 2252, side withdrawal block; 2253, spring; 2254, inclined boss; 2255, annular drive plate; 2256, telescopic cylinder; 2257, inclined groove; 23, hydraulic extruder; 30, demoulding device; 31, second support plate; 32, positioning ring; 33, flash clamping component; 331, annular Positioning box; 332, tooth wall ring; 333, reducer; 334, drive motor; 335, drive gear; 336, clamping block; 3361, first vertical plate; 3362, L-shaped limit block; 3363, second vertical plate; 3364, horizontal clamping plate; 34, forming plate clamping component; 35, pneumatic lifting component; 351, guide column rod; 352, support airbag; 353, air source pipe; 354, camera; 36, copper plate clamping component; 361, drive cylinder; 362, stop block; 40, needle-shaped structure trimming device; 41, support plate; 42, square through hole; 43, first linear module; 44, moving plate; 45, micro electric cylinder; 46, hydraulic cutting component; 461, positioning frame; 462, micro hydraulic cylinder; 463, L-shaped cutting knife. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure. Example

[0021] Please refer to the attached Figure 1 、2 , 4, 6, 7, 8, 9, 10, in a preferred embodiment of the present invention, a mold tool for preparing an IGBT module heat dissipation copper plate comprises a base plate 10, a load-bearing movable part 11 provided on the base plate 10, and a forming device 20 and a demoulding device 30 sequentially provided on the top of the base plate 10 and across the load-bearing movable part 11, wherein the execution end of the load-bearing movable part 11 is provided with a plurality of needle-shaped structure forming plates 12 sequentially stacked from top to bottom; the forming device 20 comprises two first support plates symmetrically provided on the top of the base plate 10 with the load-bearing movable part 11 as the axis Plate 21, a flash pressure-reducing copper plate forming component 22 provided between the two first support plates 21, and a hydraulic extruder 23 located on the upper part of the flash pressure-reducing copper plate forming component 22; the flash pressure-reducing copper plate forming component 22 includes a lifting plate 221 provided between the two first support plates 21, a power cylinder 222 provided at the bottom of the first support plate 21 and the execution end passing through the first support plate 21 and connected to the bottom of the lifting plate 221, a square through-hole cavity plate 223 with a top connected to the bottom of the lifting plate 221, and a plurality of flashes embedded in the bottom of the square through-hole cavity plate 223. The groove 224, and the side extraction component 225 provided on the outer wall of the square through-hole cavity plate 223 and corresponding to the position of the flash groove 224, the side extraction component 225 includes a side extraction slide 2251 embedded in the bottom of the square through-hole cavity plate 223 and connected to the flash groove 224 at one end and connected to the outer wall of the square through-hole cavity plate 223 at the other end, a side extraction block 2252 slidably connected to the side extraction slide 2251, two springs 2253 symmetrically embedded in the outer wall of the square through-hole cavity plate 223 and used to give thrust to the side extraction block 2252, and an inclined boss 2252 provided on the outer wall of the side extraction block 2252. 254, an annular driving plate 2255 sleeved on the outside of the square through-hole cavity plate 223, a plurality of telescopic cylinders 2256 provided on the top of the lifting plate 221 and used for driving the annular driving plate 2255 to rise and fall, and an inclined groove 2257 embedded in the bottom of the annular driving plate 2255 and corresponding to the position of the inclined boss 2254, the bearing movable component 11 includes two second linear modules 111 symmetrically provided on the top of the base plate 10, a hydraulic cylinder 112 provided at the execution end of the second linear module 111, and a bearing frame 113 provided at the execution end of the hydraulic cylinder 112.

[0022] It should be noted that, in this embodiment, when the mold tooling is used, a plurality of needle-shaped structure forming plates 12 are placed in the carrier 113, and the execution end of the carrying moving component 11 drives the needle-shaped structure forming plates 12 to move to the bottom of the forming device 20 and makes the bottom of the carrier 113 abut against the top of the support plate 41; At this time, the forming device 20 can perform extrusion forming of the rough copper plate. During the extrusion forming of the rough copper plate, the execution end of the power cylinder 222 drives the lifting plate 221 to descend until the bottom of the square through-hole cavity plate 223 abuts against the top of the needle-shaped structure forming plate 12 at the top, and the rough copper plate is placed from the top of the square through-hole cavity plate 223. The hydraulic extruder 23 is turned on to apply pressure to the rough copper plate, and the copper metal flows to fill the inner cavity of the square through-hole cavity plate 223, the flash groove 224 and the pinhole structure of the multiple needle-shaped structure forming plates 12 to complete the extrusion forming of the rough copper plate. After the forming is completed, the needle-shaped structure trimming device 40 cuts off the copper needles protruding from the bottom of the needle-shaped structure forming plate 12. After the cut, the hydraulic extruder 23 is reset, and the side extraction assembly 225 starts the side extraction work. After the side extraction is completed, the actuator end of the power cylinder 222 drives the lifting plate 221 to move upward, so that the copper plate can be ejected from the square through-hole cavity plate 223 after being formed. During the process of the copper plate being ejected from the square through-hole cavity plate 223, the electromagnetic block provided on the inner wall of the carrier 113 can electromagnetically attract the outer wall of the needle-shaped structure forming plate 12 to fix the needle-shaped structure forming plate 12. After the copper plate is released from the square through-hole cavity plate 223, the actuator end of the carrier moving member 11 drives the needle-shaped structure forming plate 12 to move to the demolding device 30. The demolding device 30 clamps and fixes the four corners of the copper plate released from the square through-hole cavity plate 223, so that the copper plate and the multiple needle-shaped structure forming plates 12 are moved out of the carrier 113. The demolding device 30 removes the needle-shaped structure forming plates 12 one by one and repeatedly bends the copper plate flash. Furthermore, when the load-bearing moving component 11 is working, the execution end of the second linear module 111 drives the load-bearing frame 113 to move, and the execution end of the hydraulic cylinder 112 drives the load-bearing frame 113 to move up and down; Furthermore, when the side pull-out assembly 225 is working, the executive end of the telescopic cylinder 2256 drives the annular drive plate 2255 to move upward. After the annular drive plate 2255 moves upward, the inclined groove 2257 no longer abuts the inclined boss 2254 and gives the inclined boss 2254 movement space. At this time, the side pull-out block 2252 slides in the side pull-out groove 2251 under the push of the spring 2253.

[0023] Please refer to the attached Figure 2 、 5As shown in , 7, in another preferred embodiment of the present invention, the demoulding device 30 includes two second support plates 31 symmetrically arranged on the top of the base plate 10 with the carrying moving part 11 as the axis, a positioning ring 32 arranged between the two second support plates 31, a copper plate clamping part 36 embedded in the bottom of the positioning ring 32, a burr clamping part 33 located at the top of the positioning ring 32, a forming plate clamping part 34 located at the bottom of the positioning ring 32, and a pneumatic lifting part 35 passing through the positioning ring 32, the top of the pneumatic lifting part 35 is connected to the burr clamping part 33, and the bottom of the pneumatic lifting part 35 is connected to the forming plate clamping part 34 The pneumatic lifting component 35 is used to simultaneously drive the burr clamping component 33 and the forming plate clamping component 34 to rise and fall, so as to realize the repeated bending of the copper plate burr while unloading the needle-shaped structure forming plate 12. The burr clamping component 33 includes an annular positioning box 331, a toothed wall ring 332 rotatably connected to the inner wall of the annular positioning box 331, a reducer 333 provided at the top of the annular positioning box 331, a driving motor 334 provided at the top of the annular positioning box 331 and having its output end connected to the input end of the reducer 333, a driving gear 335 provided at the output end of the reducer 333 and meshing with the toothed wall ring 332, and an annular array provided on the annular positioning box 33 1 and a clamping block 336 slidably connected to the annular positioning box 331. The bottom of the clamping block 336 is threadedly connected to the top of the toothed wall ring 332. The forming plate clamping component 34 has the same structure as the burr clamping component 33. The end of the clamping block 336 in the burr clamping component 33 is provided with a first vertical plate 3361, and the bottom of the first vertical plate 3361 is provided with an L-shaped limit block 3362. The end of the clamping block 336 in the forming plate clamping component 34 is provided with a second vertical plate 3363, and the top of the second vertical plate 3363 is provided with a horizontal clamping plate 3364. The pneumatic lifting component 35 includes a plurality of guide rods 351 that are symmetrically arranged in an annular array and pass through the positioning ring 32. Two support air bags 352 are arranged at the top and bottom of the positioning ring 32 and are sleeved on the outside of the guide column rod 351, one end of which is connected to the air source tube 353 of the support air bag 352, and a camera 354 is arranged at the top of the annular positioning box 331 in the forming plate clamping component 34, the top of the guide column rod 351 is connected to the bottom of the annular positioning box 331 in the burr clamping component 33, and the bottom of the guide column rod 351 is connected to the top of the annular positioning box 331 in the forming plate clamping component 34, and the copper plate clamping component 36 includes a plurality of drive cylinders 361 in a circular array embedded in the bottom of the positioning ring 32, and a stop block 362 provided at the execution end of the drive cylinder 361.

[0024] It should be noted that, in the present embodiment, when the demoulding device 30 is working, after the carrying moving component 11 moves the needle-shaped structure forming plate 12 to the specified position, the copper plate clamping component 36 clamps the four top corners of the copper plate to fix the copper plate. After the copper plate is fixed, the carrying moving component 11 execution end drives the carrying frame 113 to descend and reset. At this time, the burr clamping component 33 clamps the burr of the copper plate, and the forming plate clamping component 34 clamps the multiple needle-shaped structure forming plates 12 in sequence from bottom to top to realize the sequential demoulding of the multiple needle-shaped structure forming plates 12. The execution end of the pneumatic lifting component 35 simultaneously drives the burr clamping component 33 and the forming plate clamping component 34 to rise and fall. During the reciprocating lifting process of the burr clamping component 33, the burr of the copper plate is repeatedly bent. During the reciprocating lifting process of the forming plate clamping component 34, the multiple needle-shaped structure forming plates 12 are demoulded one by one. Furthermore, the working principle of the forming plate clamping component 34 is consistent with that of the flash clamping component 33. Taking the operation of the flash clamping component 33 as an example, the driving motor 334 drives the reducer 333 to work at the execution end, and the reducer 333 drives the toothed wall ring 332 to rotate through the driving gear 335. The top of the toothed wall ring 332 drives multiple clamping blocks 336 to move through the thread. The L-shaped limit block 3362 can continuously abut the copper plate flash during the lifting process, and the horizontal clamping plate 3364 is convenient for clamping the outer wall of the single needle-shaped structure forming plate 12; Furthermore, when the pneumatic lifting component 35 is working, the input end of the air source pipe 353 can be connected to the pressure air source system. When the air source system is turned on, the supporting airbag 352 can be inflated, and the supporting airbag 352 located at the top of the positioning ring 32 can expand the burr clamping component 33 and the forming plate clamping component 34 to move upward, and the supporting airbag 352 located at the bottom of the positioning ring 32 can expand the burr clamping component 33 and the forming plate clamping component 34 to move downward. The controller receives the image information of the horizontal clamping plate 3364 taken by the camera 354, and turns on the pressure air source system of the corresponding supporting airbag 352 after analysis. Furthermore, when the copper plate clamping component 36 is working, the actuator end of the driving cylinder 361 drives the stop block 362 to move, and the stop block 362 squeezes the top corner of the copper plate.

[0025] Please refer to the attached Figure 2 、 3As shown in , 7, in another preferred embodiment of the present invention, it also includes a needle-shaped structure trimming device 40 provided on the base plate 10 and located at the bottom of the forming device 20, the needle-shaped structure trimming device 40 includes a support plate 41 provided on the top of the base plate 10, a square through hole 42 vertically passing through the support plate 41, two first linear modules 43 symmetrically provided on the inner wall of the square through hole 42, a movable plate 44 whose two ends are respectively connected to the execution ends of the two first linear modules 43, a micro-electric cylinder 45 provided at the bottom of the movable plate 44 and whose execution end passes through the movable plate 44, and a hydraulic cutting component 46 provided at the execution end of the micro-electric cylinder 45, the hydraulic cutting component 46 includes a positioning frame 461 provided at the execution end of the micro-electric cylinder 45, two micro-hydraulic cylinders 462 symmetrically provided at both ends of the positioning frame 461, and an L-shaped cutting knife 463 whose two ends are respectively connected to the execution ends of the two micro-hydraulic cylinders 462.

[0026] It should be noted that in this embodiment, when the needle-shaped structure trimming device 40 is working, the executing end of the first linear module 43 drives the movable plate 44 to move, and the executing end of the micro electric cylinder 45 drives the hydraulic cutting component 46 to rise and fall. After the hydraulic cutting component 46 reaches the specified position, it cuts the copper needle. During cutting, the executing end of the micro hydraulic cylinder 462 drives the L-shaped cutting knife 463 to move, and the L-shaped cutting knife 463 cuts the copper needle.

[0027] The working principle of the present invention is: The electrical components in the present invention are all triggered to operate by the PLC controller; When the mold tooling is used, multiple needle-shaped structure forming plates 12 are placed in the carrier 113, and the execution end of the carrying moving component 11 drives the needle-shaped structure forming plates 12 to move to the bottom of the forming device 20 and makes the bottom of the carrier 113 abut against the top of the support plate 41; At this time, the forming device 20 can perform extrusion forming of the rough copper plate. During the extrusion forming of the rough copper plate, the execution end of the power cylinder 222 drives the lifting plate 221 to descend until the bottom of the square through-hole cavity plate 223 abuts against the top of the needle-shaped structure forming plate 12 at the top, and the rough copper plate is placed from the top of the square through-hole cavity plate 223. The hydraulic extruder 23 is turned on to apply pressure to the rough copper plate, and the copper metal flows to fill the inner cavity of the square through-hole cavity plate 223, the flash groove 224 and the pinhole structure of the multiple needle-shaped structure forming plates 12 to complete the extrusion forming of the rough copper plate. After the forming is completed, the needle-shaped structure trimming device 40 cuts off the copper needles protruding from the bottom of the needle-shaped structure forming plate 12. After the cut, the hydraulic extruder 23 is reset, and the side extraction assembly 225 starts the side extraction work. After the side extraction is completed, the actuator end of the power cylinder 222 drives the lifting plate 221 to move upward, so that the copper plate can be ejected from the square through-hole cavity plate 223 after being formed. During the process of the copper plate being ejected from the square through-hole cavity plate 223, the electromagnetic block provided on the inner wall of the carrier 113 can electromagnetically attract the outer wall of the needle-shaped structure forming plate 12 to fix the needle-shaped structure forming plate 12. After the copper plate is released from the square through-hole cavity plate 223, the actuator end of the carrier moving member 11 drives the needle-shaped structure forming plate 12 to move to the demolding device 30. The demolding device 30 clamps and fixes the four corners of the copper plate released from the square through-hole cavity plate 223, so that the copper plate and the multiple needle-shaped structure forming plates 12 are moved out of the carrier 113. The demolding device 30 removes the needle-shaped structure forming plates 12 one by one and repeatedly bends the copper plate flash. When the load-carrying moving component 11 is working, the execution end of the second linear module 111 drives the load-carrying frame 113 to move, and the execution end of the hydraulic cylinder 112 drives the load-carrying frame 113 to move up and down; When the side-drawing assembly 225 is working, the actuator end of the telescopic cylinder 2256 drives the annular driving plate 2255 to move upward. After the annular driving plate 2255 moves upward, the inclined groove 2257 no longer abuts the inclined boss 2254, giving the inclined boss 2254 room to move. At this time, the side-drawing block 2252 slides in the side-drawing groove 2251 under the push of the spring 2253. When the demoulding device 30 is working, after the carrying moving part 11 moves the needle-shaped structure forming plate 12 to the specified position, the copper plate clamping part 36 clamps the four top corners of the copper plate to fix the copper plate. After the copper plate is fixed, the carrying moving part 11 execution end drives the carrying frame 113 to descend and reset. At this time, the burr clamping part 33 clamps the burr of the copper plate, and the forming plate clamping part 34 clamps the multiple needle-shaped structure forming plates 12 in sequence from bottom to top to realize the sequential demoulding of the multiple needle-shaped structure forming plates 12. The execution end of the pneumatic lifting part 35 drives the burr clamping part 33 and the forming plate clamping part 34 to rise and fall at the same time. During the reciprocating lifting process of the burr clamping part 33, the burr of the copper plate is repeatedly bent. During the reciprocating lifting process of the forming plate clamping part 34, the multiple needle-shaped structure forming plates 12 are demoulded one by one. The working principle of the forming plate clamping component 34 is consistent with that of the flash clamping component 33. Taking the working of the flash clamping component 33 as an example, the driving motor 334 drives the reducer 333 to work at the execution end, and the reducer 333 drives the toothed wall ring 332 to rotate through the driving gear 335. The top of the toothed wall ring 332 drives multiple clamping blocks 336 to move through the thread. The L-shaped limit block 3362 can continuously abut the copper plate flash during the lifting process, and the horizontal clamping plate 3364 is convenient for clamping the outer wall of the single needle-shaped structure forming plate 12; When the pneumatic lifting component 35 is working, the input end of the air source pipe 353 can be connected to the pressure air source system. When the air source system is turned on, the supporting airbag 352 can be inflated, and the supporting airbag 352 located at the top of the positioning ring 32 can expand the burr clamping component 33 and the forming plate clamping component 34 to move upward, and the supporting airbag 352 located at the bottom of the positioning ring 32 can expand the burr clamping component 33 and the forming plate clamping component 34 to move downward. The controller receives the image information of the horizontal clamping plate 3364 taken by the camera 354, and turns on the pressure air source system of the corresponding supporting airbag 352 after analysis; When the copper plate clamping component 36 is working, the actuator end of the driving cylinder 361 drives the stop block 362 to move, and the stop block 362 squeezes the top corner of the copper plate; When the needle-shaped structure trimming device 40 is working, the executing end of the first linear module 43 drives the movable plate 44 to move, and the executing end of the micro electric cylinder 45 drives the hydraulic cutting component 46 to rise and fall. After the hydraulic cutting component 46 reaches the specified position, it cuts the copper needle. During cutting, the executing end of the micro hydraulic cylinder 462 drives the L-shaped cutting knife 463 to move, and the L-shaped cutting knife 463 cuts the copper needle.

[0028] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A mold tool for preparing an IGBT module heat dissipation copper plate, comprising a base plate (10), a load-bearing movable component (11) provided on the base plate (10), and a forming device (20) and a demoulding device (30) sequentially provided on the top of the base plate (10) and spanning the load-bearing movable component (11), characterized in that: The carrying moving component (11) is provided with a plurality of needle-shaped structure forming plates (12) stacked in sequence from top to bottom at the execution end; The forming device (20) comprises two first support plates (21) symmetrically arranged on the top of the base plate (10) with the bearing moving part (11) as an axis, a flash-reducing copper plate forming part (22) arranged between the two first support plates (21), and a hydraulic extruder (23) located above the flash-reducing copper plate forming part (22); The demoulding device (30) comprises two second support plates (31) symmetrically arranged on the top of the base plate (10) with the supporting moving part (11) as the axis, a positioning ring (32) arranged between the two second support plates (31), a copper plate clamping part (36) embedded in the bottom of the positioning ring (32), a burr clamping part (33) located at the top of the positioning ring (32), a forming plate clamping part (34) located at the bottom of the positioning ring (32), and a pneumatic lifting part (35) passing through the positioning ring (32), the top of the pneumatic lifting part (35) being connected to the burr clamping part (33), the bottom of the pneumatic lifting part (35) being connected to the forming plate clamping part (34), and the pneumatic lifting part (35) being used to simultaneously drive the burr clamping part (33) and the forming plate clamping part (34) to rise and fall, so as to realize repeated bending of the copper plate burr while unloading the needle-shaped structure forming plate (12).

2. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 1, characterized in that: The burr clamping component (33) comprises an annular positioning box (331), a toothed wall ring (332) rotatably connected to the inner wall of the annular positioning box (331), a reducer (333) provided at the top of the annular positioning box (331), a driving motor (334) provided at the top of the annular positioning box (331) and having its output end connected to the input end of the reducer (333), a driving gear (335) provided at the output end of the reducer (333) and meshing with the toothed wall ring (332), and a clamping block (336) provided in an annular array at the top of the annular positioning box (331) and slidably connected to the annular positioning box (331), the bottom of the clamping block (336) being threadedly connected to the top of the toothed wall ring (332). The forming plate clamping component (34) has the same structure as the burr clamping component (33).

3. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 2, characterized in that: A first vertical plate (3361) is provided at the end of the clamping block (336) in the flash clamping component (33), and an L-shaped limit block (3362) is provided at the bottom of the first vertical plate (3361). A second vertical plate (3363) is provided at the end of the clamping block (336) in the forming plate clamping component (34), and a horizontal clamping plate (3364) is provided at the top of the second vertical plate (3363).

4. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 2, characterized in that: The pneumatic lifting component (35) includes a plurality of guide pillars (351) that are inserted through the positioning ring (32) and distributed in a circular array, two support air bags (352) that are symmetrically arranged at the top and bottom of the positioning ring (32) and sleeved on the outside of the guide pillars (351), an air source tube (353) whose one end is connected to the support air bag (352), and a camera (354) that is arranged at the top of the annular positioning box (331) in the forming plate clamping component (34), the top of the guide pillar (351) is connected to the bottom of the annular positioning box (331) in the burr clamping component (33), and the bottom of the guide pillar (351) is connected to the top of the annular positioning box (331) in the forming plate clamping component (34).

5. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 1, characterized in that: The copper plate clamping component (36) comprises a plurality of driving cylinders (361) in an annular array embedded in the bottom of the positioning ring (32), and a stop block (362) provided at the execution end of the driving cylinder (361).

6. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 1, characterized in that: The flash-reducing copper plate forming component (22) comprises a lifting plate (221) arranged between the two first support plates (21), a power cylinder (222) arranged at the bottom of the first support plate (21) and having an execution end passing through the first support plate (21) and connected to the bottom of the lifting plate (221), a square through-hole cavity plate (223) whose top is connected to the bottom of the lifting plate (221), a plurality of flash grooves (224) embedded in the bottom of the square through-hole cavity plate (223), and a side drawer assembly (225) arranged on the outer wall of the square through-hole cavity plate (223) and corresponding to the position of the flash grooves (224).

7. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 6, characterized in that: The side draw assembly (225) comprises a side draw chute (2251) embedded in the bottom of the square through-hole cavity plate (223) and connected to the burr groove (224) at one end and the outer wall of the square through-hole cavity plate (223) at the other end, a side draw block (2252) slidably connected to the side draw chute (2251), and two springs (2253) symmetrically embedded in the outer wall of the square through-hole cavity plate (223) and used to give thrust to the side draw block (2252). , an inclined boss (2254) provided on the outer wall of the side drawer block (2252), an annular drive plate (2255) sleeved on the outside of the square through-hole cavity plate (223), a plurality of telescopic cylinders (2256) provided on the top of the lifting plate (221) and used for driving the annular drive plate (2255) to rise and fall, and an inclined groove (2257) embedded in the bottom of the annular drive plate (2255) and corresponding to the position of the inclined boss (2254).

8. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 1, characterized in that: The invention also includes a needle-shaped structure trimming device (40) provided on the base plate (10) and located at the bottom of the forming device (20), wherein the needle-shaped structure trimming device (40) includes a support plate (41) provided on the top of the base plate (10), a square through hole (42) vertically penetrating the support plate (41), two first linear modules (43) symmetrically provided on the inner wall of the square through hole (42), a movable plate (44) with two ends respectively connected to the execution ends of the two first linear modules (43), a micro electric cylinder (45) provided at the bottom of the movable plate (44) and with the execution end penetrating the movable plate (44), and a hydraulic cutting component (46) provided at the execution end of the micro electric cylinder (45).

9. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 8, characterized in that: The hydraulic slitting component (46) comprises a positioning frame (461) provided at the execution end of the micro electric cylinder (45), two micro hydraulic cylinders (462) symmetrically provided at both ends of the positioning frame (461), and an L-shaped slitting knife (463) with both ends respectively connected to the execution ends of the two micro hydraulic cylinders (462).

10. The mold tooling for preparing the IGBT module heat dissipation copper plate according to claim 1, characterized in that: The bearing movable component (11) comprises two second linear modules (111) symmetrically arranged on the top of the base plate (10), a hydraulic cylinder (112) arranged at the execution end of the second linear module (111), and a bearing frame (113) arranged at the execution end of the hydraulic cylinder (112).

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