CN110328348B - Production method of new energy automobile motor aluminum shell - Google Patents
Production method of new energy automobile motor aluminum shell Download PDFInfo
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- CN110328348B CN110328348B CN201910566420.9A CN201910566420A CN110328348B CN 110328348 B CN110328348 B CN 110328348B CN 201910566420 A CN201910566420 A CN 201910566420A CN 110328348 B CN110328348 B CN 110328348B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005242 forging Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000004512 die casting Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000005484 gravity Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a production method of a new energy automobile motor aluminum shell, which uses the following hardware devices: the end cover die device comprises a second upper die plate, an upper die base, an upper die core, a lower die base, a second die pin, a second lower die plate, a second sliding block, a second locking block, a second core-pulling oil cylinder, a locking block oil cylinder and the like, and the motor aluminum outer shell, the motor aluminum inner shell and the motor aluminum end cover product are obtained through a production process flow of raw material → feeding → forging and pressure maintaining → product forming. The production method can obviously improve the production efficiency of the motor aluminum shell, the yield reaches more than ninety-five percent, the casting energy consumption is greatly reduced, the internal air hole shrinkage porosity defect of the motor aluminum shell is less, the structure is compact, no crack is generated, the mechanical property is good, and the stability is good.
Description
Technical Field
The invention relates to the field of new energy automobile motor manufacturing, in particular to a new energy automobile motor shell manufacturing method.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. In recent years, pure electric vehicles are used as new energy vehicles, which are supported by great force in national policy, and the development trend of the pure electric vehicles is getting better and better. At present, in order to make a driving motor for an electric vehicle or an electric motor car lighter in weight, faster in heat dissipation and better in reliability, a motor housing cast with an aluminum material is widely used. However, the drawbacks and limitations with respect to the shells cast by the prior art are also evident, mainly in: the phenomena of shrinkage porosity, shrinkage cavity and the like are easy to occur when the product is cast by the prior art; the runner and the riser are required to be considered in the design of the die, so that the weight of the casting is far greater than that of a blank product, and the loss is increased; the product forming speed is slow in the casting process, so that the production efficiency is low; the casting is filled under the condition of dead weight or low pressure, so that the compactness of the product is not high enough. Therefore, how to improve the yield, production efficiency, product reliability and loss in production of the aluminum alloy cast motor shell is still a technical problem to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the problems and the defects and provides a production method of a motor aluminum shell of a new energy automobile, which can obviously improve the production efficiency of the motor aluminum shell, enables the yield to reach more than ninety-five percent, greatly reduces the casting energy consumption, and has the advantages of less internal air hole shrinkage porosity defect, compact structure, no crack generation, good mechanical property and good stability.
The technical scheme of the invention is realized as follows: a production method of a new energy automobile motor aluminum shell is characterized in that the following hardware devices are used for implementing the production method: the die comprises an outer shell die device, an inner shell die device and an end cover die device, wherein the outer shell die device and the inner shell die device respectively comprise a punch fixing plate, a punch, a first upper die plate, a first locking block, a first sliding block, a first die core, a first core-pulling oil cylinder, a first die carrier, a first die pin, a first lower die plate and an upright post oil cylinder, wherein the punch fixing plate and the punch are fixed together, and the punch is sleeved in a punch hole formed in the first upper die plate in a penetrating manner; the first locking block is arranged on the bottom surface of the first upper template; four corners between the first upper template and the first lower template are respectively connected with an upright oil cylinder so as to drive the first locking block to move up and down; the first die leg is arranged on the first lower die plate, the first die frame is arranged on the first die leg, the first die core is arranged on the central part of the first die frame, a plurality of first slide blocks arranged around the first die core are further arranged on the first die frame, a first cavity is formed by the first slide blocks and the first die core in a surrounding mode, and each first slide block is driven by a first core-pulling oil cylinder to be arranged on the first die frame in a horizontally sliding mode; the outer side surface of each first sliding block is also provided with an outer conical surface, and the inner side of each first locking block is correspondingly provided with an inner conical surface; and an inner annular groove of a spiral structure is also arranged on the inner side wall of the first cavity of the inner shell mold device.
The end cover die device comprises a second upper die plate, an upper die frame, an upper die core, a lower die frame, a second die leg, a second lower die plate, a second sliding block, a second locking block, a second core-pulling oil cylinder and a locking block oil cylinder, wherein an upper square groove is formed in the bottom surface of the second upper die plate, an upper nesting part is further arranged on the top surface of the upper die frame, and the upper nesting part is nested with the upper square groove; the bottom surface of the upper die frame is also provided with a lower square groove, the top surface of the upper die core is also provided with a lower nesting part, and the lower nesting part is nested with the lower square groove; the lower die frame is provided with a die core groove, and the lower die core is arranged in the die core groove; a groove for accommodating the second sliding block and the second locking block is also formed beside the mold core groove and communicated with the mold core groove; the second sliding block is arranged in a groove close to the lower mold core, and the second locking block is embedded in the groove to lock the position of the second sliding block; the locking block oil cylinder is arranged below the lower die frame, and a piston rod of the locking block oil cylinder penetrates through the lower die frame and then is connected with the second locking block; the second core-pulling oil cylinder is horizontally arranged on the side surface of the lower die carrier, and a piston rod of the second core-pulling oil cylinder is connected with the second sliding block so as to push the second sliding block to horizontally slide; and the upper mold core, the lower mold core and the second sliding block are enclosed to form a closed second cavity.
The production process flow comprises the following steps:
raw materials: melting the aluminum ingot into aluminum liquid, wherein the temperature of the aluminum liquid is 680-700 ℃; and respectively installing the outer shell mold device, the inner shell mold device and the end cover mold device on a machine table of the die-casting machine.
Charging: heating the outer shell mold device, the inner shell mold device and the end cover mold device to the working temperature of 250-300 ℃, and pouring aluminum liquid into the first cavities of the outer shell mold device and the inner shell mold device and the second cavities of the end cover mold device respectively through a liquid feeding machine; the locking block tightly sleeves the sliding block, so that the sliding block does not return when bearing high pressure.
Forging and pressure maintaining: the die casting machine respectively applies 4000-; and then, continuously applying pressure to the die device by the die casting machine for pressure maintaining for 20-30 seconds.
Molding the product: after the pressure maintaining is finished, the die-casting force of the die-casting machine returns, the locking block returns, the sliding block returns, and products are taken out from the first cavities of the outer shell die device and the inner shell die device and the second cavity of the end cover die device to obtain the motor aluminum outer shell, the motor aluminum inner shell and the motor aluminum end cover.
Producing a motor aluminum shell with one end in a sealing end structure and the other end in an open structure by die casting through a shell die device; producing an aluminum inner shell of the motor with one end in a sealing end structure and the other end in an open structure by die casting through an inner shell die device; the motor aluminum inner shell is sleeved in the motor aluminum outer shell, the motor aluminum end cover mounting cover is arranged on the end faces of the opening of the motor aluminum outer shell and the opening of the motor aluminum inner shell, and a closed cooling and heat dissipation cavity groove is formed between the outer surface of the motor aluminum inner shell and the inner surface of the motor aluminum outer shell.
The invention has the beneficial effects that: (1) by utilizing the mode of the invention, the produced motor aluminum shell has less shrinkage porosity defects of internal air holes, compact structure and good air tightness, the water channel is tested by 15MPA pressure, the air tightness is kept for 15 minutes, and the air tightness can be ensured. (2) The motor aluminum shell is molded in a pressed state, so that cracks of the motor aluminum shell are effectively prevented, and the motor aluminum shell is good in mechanical property and dimensional stability. (3) The production method of the invention achieves unprecedented height in the field of manufacturing of new energy automobile motor shells, greatly improves the production efficiency and product quality of products, greatly reduces the energy consumption of casting, and has obvious energy-saving effect. (4) The invention is different from the aluminum liquid entering mode of the traditional gravity casting and low-pressure casting process, the used mould structure is completely different, and the pressure generating mode and the pressure value for applying pressure to the aluminum liquid are different. Firstly, in terms of the mode of entering the molten aluminum, the traditional production process is to inject the molten aluminum into a mold through a pouring gate under the condition that the mold is closed. Compared with the traditional gravity casting, the aluminum liquid does not need to enter the die along a pouring channel, and no heat loss exists; compared with the traditional low-pressure casting, the method does not need a liquid lifting pipe, and does not need to increase the thickness of the product for ensuring the flow of the molten aluminum in the casting process, thereby causing loss. In addition, due to the limitations of the conventional production process in this respect, a lot of workload is increased in the subsequent further processing of the product, resulting in low production efficiency and high production cost. Therefore, in the aluminum liquid entering mode, the technical scheme of the invention is far superior to the traditional casting process in the aspects of energy saving and production efficiency.
Drawings
Fig. 1 is a schematic perspective view of an outer shell mold device and an inner shell mold device according to the present invention.
Fig. 2 is a schematic view of the assembly and disassembly structure of the outer shell mold device and the inner shell mold device according to the present invention.
Fig. 3 is a second schematic view of the assembly and disassembly structure of the outer shell mold device and the inner shell mold device of the present invention.
Fig. 4 is a schematic view of the assembling and disassembling structure of the punch fixing plate, the punch, the upper die plate and the locking block of the outer shell die device and the inner shell die device of the invention.
Fig. 5 is a schematic view of the structure of the mold frame, the slide block base, the core-pulling cylinder and the cylinder fixing plate of the outer shell mold device and the inner shell mold device of the invention.
Fig. 6 is a schematic view of the structure of the outer shell mold device and the inner shell mold device for assembling and disassembling the mold frame and the mold core.
Fig. 7 is a schematic perspective view of the end cap mold apparatus of the present invention.
Fig. 8 is a schematic perspective view of the end cap mold device according to the present invention in a disassembled and assembled state.
Fig. 9 is a schematic perspective view of the upper mold plate, the upper mold frame, and the upper mold core of the end cover mold device of the present invention in a disassembled state.
Fig. 10 is a schematic view of an assembled three-dimensional structure of a lower mold core, a lower mold frame, a slide block, a locking block and a limiting block of the end cover mold device of the invention.
Fig. 11 is a schematic perspective view of the lower mold core, the lower mold base, the slide block, the locking block, and the limiting block of the end cover mold device in the disassembled and assembled state.
Fig. 12 is a schematic perspective view of the lower mold frame, the thickening block, the ejector plate, the mold leg, and the lower mold plate of the end cover mold device of the present invention in a disassembled state.
Fig. 13 is a schematic perspective view of the second ejector pin mechanism of the present invention in a disassembled and assembled state.
Detailed Description
As shown in fig. 1 to 13, in the production method of the aluminum housing of the new energy automobile motor, the following hardware devices are used: outer shell mold device, inner shell mold device, end cover mold device.
As shown in fig. 1 to 6, the outer shell mold device and the inner shell mold device respectively include a punch fixing plate 1, a punch 2, a first upper mold plate 3, a first locking block 4, a first sliding block 5, a first mold core 6, a first core-pulling oil cylinder 7, a first mold base 9, a first mold foot 10, a first lower mold plate 11, an upright oil cylinder 12, and the like.
As shown in fig. 1 to 3, the punch fixing plate 1 is further provided with a U-shaped groove 200 to realize the die mounting on the upper machine platen of the die casting machine. The punch fixing plate 1 and the punch 2 are fixed together. Specifically, as shown in fig. 4, the bottom surface of the punch fixing plate 1 is further provided with a cavity groove 110, and the punch 2 is further provided with a punch connecting portion 111, and the punch connecting portion 111 is in engagement with and fixed to the cavity groove 110 to achieve the assembly connection of the punch fixing plate 1 and the punch 2.
As shown in fig. 4, the first upper die plate 3 is provided with a punch hole 101, and when the first upper die plate 3 is attached to the punch fixing plate 1, the punch 2 is inserted into the punch hole 101. The first locking block 4 is disposed on the bottom surface of the first upper mold plate 3. Generally, a mounting recess 201 is further provided on the bottom surface of the first upper template 3, and the first locking block 4 is embedded in the mounting recess 201 and fixedly assembled together by means of screws and screw holes.
As shown in fig. 1 to 3, the four corners between the first upper die plate 3 and the first lower die plate 11 are respectively connected with the upright cylinder 12 to drive the first locking block 4 to move up and down, so that the first locking block 4 embraces and separates from the first sliding block 5. Between first cope match-plate pattern 3 and the top of stand hydro-cylinder 12, and between first drag match-plate pattern 11 and the bottom of stand hydro-cylinder 12, fix the assembly through setting up screw hole, screw respectively.
As shown in fig. 1 to 3, the first mold leg 10 is disposed on the first lower mold plate 11, the first mold frame 9 is disposed on the first mold leg 10, and the first mold core 6 is disposed on a central portion of the first mold frame 9. In order to ensure that the first mold core 6 can be accurately aligned in the installation process, as shown in fig. 6, a square groove 108 is further formed in the middle of the first mold frame 9, a square nesting part 109 is correspondingly formed at the bottom of the first mold core 6, and the first mold core 6 is installed in the middle of the first mold frame 9 by nesting and fixing the square nesting part 109 and the square groove 108.
As shown in fig. 2 and 5, a plurality of first sliders 5 arranged around the first mold core 6 are further arranged on the first mold frame 9, each first slider 5 and the first mold core 6 enclose to form a first cavity 400, and each first slider 5 is driven by the first core-pulling cylinder 7 to be horizontally arranged on the first mold frame 9 in a sliding manner. In order to further optimize the assembling and connecting structure between the first sliding block 5 and the first die carrier 9, as shown in fig. 5 and 6, a sliding block groove 107 is formed in the first die carrier 9, a sliding block base 103 is further formed at the bottom of the first sliding block 5, and the sliding block base 103 is nested in the sliding block groove 107; an oil cylinder fixing plate 8 is further arranged at the end face position, located in the slider groove 107, of the first die carrier 9, the first core pulling oil cylinder 7 is installed on the oil cylinder fixing plate 8, a first connecting block 104 is further arranged on a piston rod of the first core pulling oil cylinder 7, a first connecting groove 105 is correspondingly arranged on the slider base 103, and the first connecting block 104 is embedded in the first connecting groove 105 to achieve driving connection between the first core pulling oil cylinder 7 and the first slider 5.
Furthermore, an outer tapered surface 106 is provided on the outer side surface of each first slider 5, and an inner tapered surface 102 is correspondingly provided on the inner side of the first locking piece 4. An inner ring groove 4001 of a spiral structure is further arranged on the inner side wall of the first cavity 400, and the inner ring groove 4001 can enable the outer surface of the processed motor inner shell to form a heat dissipation concave ring groove structure for cooling liquid to flow along.
In order to facilitate people to take out die-cast products from the mold, as shown in fig. 3 and 13, the die-cast product molding apparatus further includes a first thimble mechanism 13, the first thimble mechanism 13 is disposed between the first mold frame 9 and the first mold leg 10, the first thimble mechanism 13 is composed of a first thimble fixing plate 131, a first thimble 132, a first thimble pressing plate 133, a first thimble guide column 134, and a first thimble guide sleeve 135, and the first thimble 132 penetrates through the first mold frame 9 and is disposed on the first mold core 6.
The operation principle and process of the outer shell mold device and the inner shell mold device are roughly as follows: when the punch fixing device is used, the outer shell die device and the inner shell die device are respectively arranged on machine tables of two die-casting machines, the first lower die plate 11 and the machine tables are fixed, and then the punch fixing plate 1 is fixed on the upper machine table. The upper machine platen is connected with a piston rod of a main oil cylinder to drive the punch fixing plate 1 to move up and down, so that the die is installed on the machine platen of the die-casting machine.
And when the machine runs, the main oil cylinder on the machine table drives the punch fixing plate 1 to move upwards to a preset position. Then, the molten aluminum is poured into a first cavity 400 enclosed by the first slide blocks 5 and the first mold core 6 by the feeding machine. After the aluminium liquid that falls finishes, the master cylinder drive drift fixed plate 1 downstream on the board, make drift 2 stretch into first die cavity 400 downwards, extrude to drift fixed plate 1 compress tightly first cope match-plate pattern 3, first locking piece 4 pushes down the cover on the round platform that a plurality of first sliders 5 enclose and close, because the interact of the interior conical surface 102 of first locking piece 4 and the outer conical surface 106 of first slider 5, the pressure that the master cylinder on the board was applyed is big more, first locking piece 4 is just bigger to the locking dynamics of first slider 5. Thus, it is well ensured that the first slide 5 is always in the correct position under a pressure of several thousand tons; during this process, the set maximum pressure is maintained for 25-30 seconds, referred to as the dwell phase. Meanwhile, the aluminum liquid is solidified and formed at this stage due to the temperature drop. After the product is formed, the main oil cylinder returns upwards, the pressure is removed, and the punch fixing plate 1 moves upwards and reaches a preset position. Then, the four upright cylinders 12 push the first upper die plate 3 upward, and rise until the first locking block 4 is separated from the first slide block 5 to a preset position. At this time, the lowest bottom surface of the first locking piece 4 is higher than the top surface of the first slider 5 by a product height to facilitate the removal of the product. Next, each first core-pulling oil cylinder 7 pulls each first sliding block 5 and the sliding block base 7 to slide outwards, and each first sliding block 5 is separated from each other and also separated from the product. Then, the lower ejection cylinder of the machine moves upward, the first push thimble 132 moves upward to jack up the motor housing product, so that the product is separated from the first mold core 6, and the housing product is taken out. The next die-casting process is carried out, each first core-pulling oil cylinder 7 drives the slide block base 103 to drive the first slide block 5 to slide and polymerize towards the center of the first die core 6, the first slide block 5 is in contact with the die core, the four upright post oil cylinders 12 move downwards to drive the first upper die plate 3 to move downwards, the first locking block 4 presses downwards to be sleeved on a circular table formed by enclosing the first slide blocks 5, the molten aluminum is poured into the first cavity 400 by the molten aluminum feeding machine, then the main oil cylinders on the machine table drive the punch fixing plate 1 to move downwards, the processes are repeated, and the motor inner shell and the motor outer shell are processed and produced, wherein the section diameter of the motor outer shell is larger than that of the inner shell, so that the motor inner shell can be sleeved in the motor outer shell greatly. Thus, in manufacturing both mold devices, the first cavity 400 of the outer shell mold device must be larger than the first cavity 400 of the inner shell mold device.
As shown in fig. 7 to 12, the end cover mold device includes a second upper mold plate 31, an upper mold frame 32, an upper mold core 33, a lower mold core 34, a lower mold frame 35, a second mold leg 36, a second lower mold plate 37, a second slider 305, a second locking block 306, a second core-pulling cylinder 307, a locking block cylinder 308, and the like. The assembly connection relationship of each component is as follows:
as shown in fig. 9, the second upper die plate 31 is provided with a U-shaped groove 200 to realize the mounting connection on the platen of the die casting machine. Guide sleeves 38 are further provided at four corners of the second upper mold plate 31, respectively, to achieve a correct alignment of the second upper mold plate 31 and the lower mold frame 35 with the guide posts 39 when the mold is closed. As shown in fig. 9, an upper groove 311 is formed on the bottom surface of the second upper mold plate 31, and an upper nesting portion 321 is formed on the top surface of the upper mold frame 32, and the upper nesting portion 321 is nested in the upper groove 311, so that the upper mold frame 32 is fixed at a correct position.
Similarly, the bottom surface of the upper mold frame 32 is also provided with a lower square groove 322, and the top surface of the upper mold core 33 is also provided with a lower nesting part which is nested with the lower square groove 322 so as to fix the upper mold core 33 at a correct position.
As shown in fig. 8 or 11, a core groove 351 is formed in the lower mold frame 35, and the lower core 34 is installed in the core groove 351; a groove 352 for accommodating the second slider 305 and the second locking block 306 is further provided beside the mold core groove 351, and the groove 352 is communicated with the mold core groove 351. As shown in fig. 10, the second slider 305 is mounted in a groove 352 near the lower core 34, and the second locking block 306 is inserted into the groove 352 to lock the position of the second slider 305. The locking block oil cylinder 308 is arranged below the lower die frame 35, a piston rod of the locking block oil cylinder 308 penetrates through the lower die frame 35 and then is connected with the second locking block 306, so that the locking block oil cylinder 308 drives the second locking block 306 to move up and down, one side face of the second locking block 306 is in contact with the lower die frame 35, and the other side face of the second locking block 306 is in contact with the second sliding block 305, so that the second sliding block 305 is extruded. The confronting sides on both sides of the second clamp block 306 are tapered to lock the slide position during closing.
As shown in fig. 8, 10, and 11, the second core-pulling cylinder 307 is horizontally disposed on a side surface of the lower mold frame 35, and a piston rod of the second core-pulling cylinder 307 is connected to the second slider 305 to push the second slider 305 to horizontally slide. The upper mold core 33, the lower mold core 34 and the second slide block 305 enclose to form a closed second cavity 401.
As shown in fig. 8, 10, and 11, the recess 352 of the lower mold frame 35 is further provided with a stop block 309 at each of two ends of the second sliding block 305, and the stop blocks are used to keep the second sliding block 305 at a correct position without being shifted during the moving process.
In order to enable the second slider 305 and the second core pulling cylinder 307 to be simply and reliably connected together, as shown in fig. 11, a connecting groove 3051 is further provided on a side surface of the second slider 305, and a second connecting block 3071 is further provided on a piston rod of the second core pulling cylinder 307, and the second connecting block 3071 is in engagement with the connecting groove 3051. The modeling structure of the connecting block is processed to be just matched with the modeling of the connecting groove 3051.
As shown in fig. 7 and 8, two second mold legs 36 are further disposed between the lower mold frame 35 and the second lower mold plate 37, and a thickening block 371 is further disposed between the second mold legs 36 and the lower mold frame 35. The thickening block 371 is attached to the bottom of the lower die frame 35 to support the lower die frame 35 and ensure that the lower die frame does not deform under thousands of tons of pressure. As shown in fig. 12 and 13, a second thimble mechanism 130 is further disposed between the two second mold legs 36 at the bottom of the thickened block 371, the second thimble mechanism 130 is composed of a second thimble fixing plate 1301, a second thimble 1302, a second thimble pressing plate 1303, a second thimble guide pillar 1304, and a second thimble guide sleeve 1305, and the second thimble 1302 sequentially passes through the thickened block 371 and the lower mold frame 35 and is disposed to be inserted into the lower mold core 34. Sufficient space is reserved between the second mold foot 36 fixed to the thickening block 371 and the second lower mold plate 37 to provide space for the second needle fixing plate 1301, the second needle pressing plate 1303 and the second needle 1302, and simultaneously, the second mold foot plays a role of raising the mold.
In order to further make the overall structure of the end cover mold device more compact, as shown in fig. 7 and 8, the locking block cylinder 308 is vertically arranged in a cavity 500 formed between two second mold legs 36 at the bottom of the thickened block 371, and a piston rod of the locking block cylinder 308 sequentially passes through the thickened block 371 and the lower mold frame 35 and then is connected with the bottom surface of the second locking block 306.
The working principle and process of the end cover die device of the invention are roughly as follows:
the end cover die device is installed on an upper machine table of a die-casting machine, a second upper die plate 31 is fixed with the upper machine table plate, a second lower die plate 37 is fixed with a lower machine table plate of the die-casting machine, and a second ejector pin pressing plate 1303 is connected with a lower ejection oil cylinder of the machine table. Firstly, the main oil cylinder of the machine station drives the second upper template 31, the upper mold frame 32, the upper mold core 33 and the like to move upwards to reach the designated positions, so that the mold is in an open state. At this time, the molten aluminum is directly poured into the cavity enclosed by the lower mold core 34 and the second slide block 305 by the feeding machine, as shown in fig. 10. After the soup feeder finishes the action, a piston rod of a main oil cylinder of the machine moves downwards to drive the second upper template 31, the upper mold frame 32, the upper mold core 33 and the like to move downwards, so that the upper mold core 33 extrudes a cavity surrounded by the lower mold core 34 and the second slide block 305, the upper mold frame 32 and the lower mold core 34 are completely attached, and the set maximum pressure is maintained for 25-30 seconds (the process is called as a pressure maintaining stage). Meanwhile, the aluminum liquid is solidified at the stage and is formed. After the product is formed, the pressure of the main oil cylinder of the machine is relieved, and the four upright oil cylinders on the machine push the upper machine plate upwards to drive the second upper template 31, the upper mold frame 32 and the upper mold core 33 to move upwards and reach the designated positions. At this time, the latch block cylinder 308 pushes the second latch block 306 upward to reach a position higher than the second slide block 305, and the second core-pulling cylinder 307 drives the second slide block 305 to retreat to reach a specified position. Then, a lower ejection cylinder of the machine table pushes the second thimble pressing plate 1303, the second thimble fixing plate 1301, and the second thimble 1302 upward, so that the second thimble 1302 separates the product from the lower mold core 34, and the product is taken out. After the product is taken out, the mold is closed again, the ejection cylinder under the machine table retracts to drive the second ejector pin press plate 1303, the second ejector pin fixing plate 1301 and the second ejector pin 1302 to retract to the lowest position, the second core pulling cylinder 307 drives the second slide block 305 to be in contact with the lower mold core 34, then the locking block cylinder 308 pulls the second locking block 306 downwards to be in contact with the second slide block 305 and the lower mold frame 35 respectively, so that the second slide block 305 is always kept at the correct position under the pressure of thousands of tons, that is, as shown in fig. 10, after the product is taken out, the molten aluminum is poured into the cavity formed by the lower mold core 34 and the second slide block 305 by the feeding machine again. The above procedures are circulated, and the motor shell end cover is processed and produced.
The production process flow comprises the following steps:
raw materials: melting the aluminum ingot into aluminum liquid, wherein the temperature of the aluminum liquid is 680-700 ℃; and respectively installing the outer shell mold device, the inner shell mold device and the end cover mold device on a machine table of the die-casting machine.
Charging: heating the outer shell mold device, the inner shell mold device and the end cover mold device to the working temperature of 250-300 ℃, and pouring aluminum liquid into the first cavities 400 of the outer shell mold device and the inner shell mold device and the second cavities 401 of the end cover mold device respectively through a feeding machine; the locking block tightly sleeves the sliding block, so that the sliding block does not return when bearing high pressure.
Forging and pressure maintaining: the die casting machine respectively applies 4000-; and then, continuously applying pressure to the die device by the die casting machine for pressure maintaining for 20-30 seconds.
Molding the product: after the pressure maintaining is finished, the die-casting force of the die-casting machine returns, the locking block returns, the sliding block returns, and products are taken out from the first cavities 400 of the outer shell die device and the inner shell die device and the second cavities 401 of the end cover die device to obtain the motor aluminum outer shell, the motor aluminum inner shell and the motor aluminum end cover.
Producing a motor aluminum shell with one end in a sealing end structure and the other end in an open structure by die casting through a shell die device; producing an aluminum inner shell of the motor with one end in a sealing end structure and the other end in an open structure by die casting through an inner shell die device; the motor aluminum inner shell is sleeved in the motor aluminum outer shell, the motor aluminum end cover mounting cover is arranged on the end faces of the opening of the motor aluminum outer shell and the opening of the motor aluminum inner shell, and a closed cooling and heat dissipation cavity groove is formed between the outer surface of the motor aluminum inner shell and the inner surface of the motor aluminum outer shell.
Claims (9)
1. A production method of a new energy automobile motor aluminum shell is characterized by comprising the following steps: the production method is implemented by using the following hardware devices: outer shell mold device, inner shell mold device, end cap mold device, wherein
The outer shell die device and the inner shell die device respectively comprise a punch fixing plate (1), a punch (2), a first upper die plate (3), a first locking block (4), a first sliding block (5), a first die core (6), a first core-pulling oil cylinder (7), a first die carrier (9), a first die pin (10), a first lower die plate (11) and an upright post oil cylinder (12), wherein the punch fixing plate (1), the punch (2), the first upper die plate (3), the first locking block, the first sliding block (5), the first die core (6), the first core-pulling oil cylinder (7), the first die carrier (9), the first die pin (10), the first lower die plate (11) and the upright post oil cylinder (12) are arranged in sequence, and the inner shell die device and the upright post oil cylinder are arranged in sequence
The punch fixing plate (1) is fixed with the punch (2), and the punch (2) is sleeved in a punch hole (101) formed in the first upper template (3); the first locking block (4) is arranged on the bottom surface of the first upper template (3); four corners between the first upper template (3) and the first lower template (11) are respectively connected with upright cylinder (12) to drive the first locking block (4) to move up and down;
the first die leg (10) is arranged on the first lower die plate (11), the first die frame (9) is arranged on the first die leg (10), the first die core (6) is arranged on the central part of the first die frame (9), a plurality of first sliding blocks (5) arranged around the first die core (6) are further arranged on the first die frame (9), each first sliding block (5) and the first die core (6) are enclosed to form a first cavity (400), and each first sliding block (5) is driven by the first core-pulling oil cylinder (7) to be arranged on the first die frame (9) in a horizontal sliding motion manner; the outer side surface of each first sliding block (5) is also provided with an outer conical surface (106), and the inner side of each first locking block (4) is correspondingly provided with an inner conical surface (102);
an inner ring groove (4001) with a spiral structure is also arranged on the inner side wall of the first cavity (400) of the inner shell mold device;
the end cover die device comprises a second upper die plate (31), an upper die frame (32), an upper die core (33), a lower die core (34), a lower die frame (35), a second die foot (36), a second lower die plate (37), a second sliding block (305), a second locking block (306), a second core-pulling oil cylinder (307) and a locking block oil cylinder (308), wherein the second upper die plate (31), the upper die frame (32), the upper die core (33), the lower die core (34), the lower die frame (35), the second die foot (36), the second lower die plate (37), the second sliding block (305), the second locking block (306), the second core-pulling oil cylinder (307) and the locking block oil cylinder (308) are arranged in sequence, and the end cover die device is characterized in that
The bottom surface of the second upper template (31) is provided with an upper groove (311), the top surface of the upper die carrier (32) is also provided with an upper nesting part (321), and the upper nesting part (321) is nested with the upper groove (311);
the bottom surface of the upper die carrier (32) is also provided with a lower square groove (322), the top surface of the upper die core (33) is also provided with a lower nested part, and the lower nested part is nested with the lower square groove (322);
a die core groove (351) is formed in the lower die frame (35), and the lower die core (34) is installed in the die core groove (351); a groove (352) for accommodating the second sliding block (305) and the second locking block (306) is also formed beside the mold core groove (351), and the groove (352) is communicated with the mold core groove (351);
the second sliding block (305) is arranged in a groove (352) close to the lower mold core (34), and the second locking block (306) is embedded in the groove (352) to lock the position of the second sliding block (305); the locking block oil cylinder (308) is arranged below the lower die carrier (35), and a piston rod of the locking block oil cylinder (308) penetrates through the lower die carrier (35) and then is connected with the second locking block (306);
the second core-pulling oil cylinder (307) is horizontally arranged on the side surface of the lower die carrier (35), and a piston rod of the second core-pulling oil cylinder (307) is connected with the second sliding block (305) so as to push the second sliding block (305) to horizontally slide; the upper mold core (33), the lower mold core (34) and the second sliding block (305) are enclosed to form a closed second cavity (401);
the production process flow comprises the following steps:
raw materials: melting the aluminum ingot into aluminum liquid, wherein the temperature of the aluminum liquid is 680-700 ℃; respectively installing an outer shell mold device, an inner shell mold device and an end cover mold device on a machine table of a die-casting machine;
charging: heating the outer shell mold device, the inner shell mold device and the end cover mold device to the working temperature of 250-300 ℃, and pouring aluminum liquid into a first cavity (400) of the outer shell mold device and the inner shell mold device and a second cavity (401) of the end cover mold device respectively through a feeding machine; the locking block tightly sleeves the sliding block, so that the sliding block does not return when bearing high pressure;
forging and pressure maintaining: the die casting machine respectively applies 4000-; then, continuously applying pressure to the die device by a die casting machine for pressure maintaining for 20-30 seconds;
molding the product: after pressure maintaining is finished, the die-casting force of the die-casting machine returns, the locking block returns, the sliding block returns, and products are taken out from a first cavity (400) of the outer shell die device and the inner shell die device and a second cavity (401) of the end cover die device to obtain a motor aluminum outer shell, a motor aluminum inner shell and a motor aluminum end cover;
producing a motor aluminum shell with one end in a sealing end structure and the other end in an open structure by die casting through a shell die device; producing an aluminum inner shell of the motor with one end in a sealing end structure and the other end in an open structure by die casting through an inner shell die device; the motor aluminum inner shell is sleeved in the motor aluminum outer shell, the motor aluminum end cover mounting cover is arranged on the end faces of the opening of the motor aluminum outer shell and the opening of the motor aluminum inner shell, and a closed cooling and heat dissipation cavity groove is formed between the outer surface of the motor aluminum inner shell and the inner surface of the motor aluminum outer shell.
2. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: a sliding block groove (107) is formed in the first die carrier (9), a sliding block base (103) is further arranged at the bottom of the first sliding block (5), and the sliding block base (103) is nested in the sliding block groove (107); the end face position that lies in slider groove (107) on first die carrier (9) still is provided with hydro-cylinder fixed plate (8), first hydro-cylinder (7) of loosing core is installed on hydro-cylinder fixed plate (8), still be equipped with first connecting block (104) on the piston rod of first hydro-cylinder (7) of loosing core, be equipped with first connecting groove (105) on slider base (103) correspondingly, first connecting block (104) are set in first connecting groove (105) to realize the drive between first hydro-cylinder (7) of loosing core and first slider (5) and be connected.
3. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: the middle part of the first die carrier (9) is also provided with a square groove (108), the bottom of the first die core (6) is correspondingly provided with a square nesting part (109), and the first die core (6) is nested and fixed with the square groove (108) through the square nesting part (109) to be installed on the middle part of the first die carrier (9).
4. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: the bottom surface of the punch fixing plate (1) is also provided with a concave cavity groove (110), the punch (2) is also provided with a punch connecting part (111), and the punch connecting part (111) is embedded and fixed with the concave cavity groove (110) so as to realize the assembly connection of the punch fixing plate (1) and the punch (2).
5. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: and limiting blocks (309) are respectively arranged at two ends of the second sliding block (305) in the groove (352) of the lower die carrier (35).
6. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: the side face of the second sliding block (305) is further provided with a second connecting groove (3051), a piston rod of the second core-pulling oil cylinder (307) is further provided with a second connecting block (3071), and the second connecting block (3071) is connected with the second connecting groove (3051) in an embedded mode.
7. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: still be equipped with two second mould feet (36) between lower die carrier (35) and second lower bolster (37), still be equipped with thickening piece (371) between second mould foot (36) and lower die carrier (35), still be equipped with second thimble mechanism (130) between two second mould feet (36) that lie in thickening piece (371) bottom, this second thimble mechanism (130) comprises second thimble fixed plate (1301), second thimble (1302), second thimble clamp plate (1303), second roof guide pillar (1304), second roof guide pin bushing (1305), second thimble (1302) pass thickening piece (371), lower die carrier (35) according to the preface and be the cover and set up on lower die core (34).
8. The production method of the new energy automobile motor aluminum shell according to claim 7, characterized in that: the locking block oil cylinder (308) is vertically arranged in a cavity groove (500) formed between two second die feet (36) positioned at the bottom of the thickening block (371), and a piston rod of the locking block oil cylinder (308) sequentially penetrates through the thickening block (371) and the lower die frame (35) and then is connected with the bottom surface of the second locking block (306).
9. The production method of the new energy automobile motor aluminum shell as claimed in claim 1, characterized in that: the mould structure is characterized by further comprising a first ejector pin mechanism (13), wherein the first ejector pin mechanism (13) is arranged between the first mould base (9) and the first mould foot (10), the first ejector pin mechanism (13) is composed of a first ejector pin fixing plate (131), a first ejector pin (132), a first ejector pin pressing plate (133), a first top plate guide pillar (134) and a first top plate guide sleeve (135), and the first ejector pin (132) penetrates through the first mould base (9) to be arranged on the first mould core (6) in a penetrating mode.
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| CN110802213A (en) * | 2019-11-29 | 2020-02-18 | 浙江拓卡斯科技股份有限公司 | New energy electric automobile controller shell casting mold and working method thereof |
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| CN112531988B (en) * | 2020-11-24 | 2023-01-03 | 南京金志精密机电有限公司 | Rotor die-casting sheath and application method thereof |
| CN112713734A (en) * | 2020-12-22 | 2021-04-27 | 苏州广型模具有限公司 | A movable mould mechanism for shaping new forms of energy motor casing |
| CN113000820B (en) * | 2021-03-10 | 2023-03-31 | 昆明理工大学 | Die for semi-solid aluminum alloy extrusion motor shell |
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| CN114226685B (en) * | 2021-12-25 | 2024-05-03 | 中芯晟捷(江苏)精密科技有限公司 | Internal support heat dissipation device for welding aluminum alloy die castings |
| CN114330022A (en) * | 2022-01-14 | 2022-04-12 | 无锡锡南科技股份有限公司 | Design method of new energy motor casing heat exchange equalization die |
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