CN116393586B - Motor shell axial double-layer laminated material forming process - Google Patents
Motor shell axial double-layer laminated material forming process Download PDFInfo
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- CN116393586B CN116393586B CN202310668023.9A CN202310668023A CN116393586B CN 116393586 B CN116393586 B CN 116393586B CN 202310668023 A CN202310668023 A CN 202310668023A CN 116393586 B CN116393586 B CN 116393586B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000002648 laminated material Substances 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 36
- 239000011265 semifinished product Substances 0.000 claims abstract description 29
- 238000007493 shaping process Methods 0.000 claims abstract description 18
- 239000000047 product Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims description 16
- 239000010410 layer Substances 0.000 description 11
- 238000003475 lamination Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention provides a motor housing axial double-layer material forming process, and belongs to the technical field of forming processes. The forming process comprises the following steps: step 10, stretching and forming the raw material sheet to obtain a first semi-finished shell; step 20, shaping the first semi-finished shell to obtain a second semi-finished shell; step 30, cutting off the bottom edge of the second semi-finished product shell to obtain a third semi-finished product shell; and step 40, stretching the side wall shell of the third semi-finished product shell along the radial direction far away from the axis, so that the side wall shell is overlapped in the axial direction to form a material overlapping part, and a finished product shell meeting the preset requirements is obtained. The motor shell axial double-layer material forming process improves the dimensional accuracy of products.
Description
Technical Field
The invention belongs to the technical field of forming processes, and particularly relates to a motor housing axial double-layer lamination forming process.
Background
The existing motor shell axial double-layer material stretching process enables the wall thickness of the motor shell to be uneven after stretching and the stretching height of the shell before material lamination to be unstable, so that excessive material allowance is caused, and meanwhile, the fluctuation of the outer diameter size of a material lamination part is large, so that the outer diameter and the inner diameter of the shell of the material lamination part cannot be controlled accurately. The plane of the stacked material cannot be pressed in place, so that gaps are easy to generate at the stacked material position, waste liquid in the gaps cannot be discharged in the electroplating pretreatment process, and the poor proportion of the electroplated product is high. When the stacking mold is designed, the boundary line of the upper mold and the lower mold is selected on the largest arc of the outer diameter of the stacking, so that the outer surface of the stacking part is provided with a joint mark.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the motor shell axial double-layer material forming process is provided, and the dimensional accuracy of the product is improved.
In order to solve the technical problems, the invention provides a motor housing axial double-layer lamination forming process, which comprises the following steps:
step 10, stretching and forming the raw material sheet to obtain a first semi-finished shell; the first semi-finished product shell is cylindrical, and the top end of the first semi-finished product shell is provided with a bearing chamber; the error between the inner diameter of the first semi-finished product shell and the inner diameter of the preset shell is within a preset error range, the error between the inner diameter of the bearing chamber of the first semi-finished product shell and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber of the first semi-finished product shell and the outer diameter of the preset bearing chamber is within a preset error range;
step 20, shaping the first semi-finished shell to obtain a second semi-finished shell; the error between the height of the second semi-finished product shell and the height before the preset stacking is within a preset error range;
step 30, cutting off the bottom edge of the second semi-finished product shell to obtain a third semi-finished product shell;
and step 40, stretching the side wall shell of the third semi-finished product shell along the radial direction far away from the axis, so that the side wall shell is overlapped in the axial direction to form a material overlapping part, and a finished product shell meeting the preset requirements is obtained.
As a further improvement of the present invention, in the step 30, a bottom edge of the second semi-finished casing is cut off by a fine blanking process.
As a further improvement of the present invention, in the step 10, the raw material sheet is stretched to form a cylindrical shell; stretching the cylindrical shell at least twice, wherein each stretching reduces the inner diameter of the cylindrical shell, and increases the height of the cylindrical shell until the error between the inner diameter of the cylindrical shell and the inner diameter of the preset shell is within a preset error range; and then stretching the top end of the cylindrical shell to form a bearing chamber meeting preset requirements, so that the error between the inner diameter of the bearing chamber and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber and the outer diameter of the preset bearing chamber is within a preset error range, thereby obtaining the first semi-finished shell.
As a further improvement of the present invention, in the step 10, extrusion stretch forming is performed by using different forming dies for each stretch.
In step 40, the third semi-finished shell is extruded by the stacking mold under pressure to form a stacking portion at a predetermined height position of the third semi-finished shell, and the stacking portion is subjected to overpressure to bond two shells of the stacking portion, so that an error between an outer diameter of the stacking portion and a predetermined stacking outer diameter is within a predetermined error range, and a finished shell meeting a predetermined requirement is obtained.
As a further improvement of the invention, the stacking mould comprises an upper mould entering block and a lower mould entering block which are matched;
in step 40, when the upper molding block and the lower molding block are closed, the bottom end of the upper molding block is flush with the bottom end of the stacking portion, and the top end of the lower molding block is flush with the bottom end of the stacking portion.
As a further improvement of the present invention, the step 40 further includes:
and removing burrs on the bottom edge of the third semi-finished shell.
In step 40, the third semi-finished shell is extruded by the stacking mold to remove burrs at the bottom edge of the third semi-finished shell, and the stacking portion with the outer diameter being the preset stacking outer diameter is formed at the preset height position of the third semi-finished shell, so as to obtain the finished shell meeting the preset requirement.
As a further improvement of the invention, the stacking mould comprises an upper mould entering block and a lower mould entering block which are matched; the lower die inlet block is provided with a chamfer at a position corresponding to the bottom of the third semi-finished product shell;
in step 40, the bottom edge burr of the third semi-finished shell is removed by chamfering the lower mold insert.
In step 40, the sidewall shell of the third semi-finished shell is stretched in a direction away from the axis in a radial direction, so that the inner diameter of the third semi-finished shell and the inner diameter and the outer diameter of the bearing chamber are kept unchanged when the sidewall shells are overlapped in the axial direction to form the overlapped part, and a finished shell meeting preset requirements is obtained.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the double-layer stacking forming process for the bearing chamber of the motor shell, raw material sheets are stretched to obtain a first semi-finished shell with the bearing chamber, and the inner diameter of the first semi-finished shell and the inner diameter and the outer diameter of the bearing chamber meet preset requirements; according to the preset stacking outer diameter and the preset shell height, calculating to obtain a preset stacking front height, and shaping the first semi-finished shell so that the shell height and the preset stacking front height are within a preset error range to obtain a second semi-finished shell; then cutting off the bottom edge of the second semi-finished product shell to obtain a third semi-finished product shell; and finally, axially superposing the third semi-finished shell to form a superposition part meeting the requirements, thereby obtaining the finished shell. According to the method, the shell with the bearing chamber is formed by stretching and forming, then stacking and forming are carried out, and the finished shell is obtained by stretching and forming for multiple times, so that materials can flow more stably in the forming process, the reduction rate of the wall thickness of the shell is reduced, the thickness requirement on a raw material sheet is reduced, raw materials are saved, and the cost is reduced. Before stacking, the inner diameter of the shell and the inner diameter of the bearing chamber are enabled to meet preset requirements, then the height of the shell is shaped according to the preset height before stacking, the volume stability before stacking is ensured, the inner diameter of the shell is ensured not to be influenced by material flow during stacking, the outer diameter of stacking and the height of the shell after stacking are easier to control, the finished shell is ensured to meet the preset requirements, and the deviation between the inner diameter of the finished shell and the preset inner diameter is within 0.05 mm.
Drawings
FIG. 1 is a flow chart of a process for forming an axial dual layer laminate for a motor housing according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first semi-finished housing according to an embodiment of the present invention;
FIG. 3 is a schematic view of a second semi-manufactured chassis according to the method of the present invention;
FIG. 4 is a schematic view of a third semi-manufactured chassis according to the method of the present invention;
FIG. 5 is a schematic view of the structure of a finished chassis according to the method of the present invention;
FIG. 6 is a diagram showing a closed-mold state when shaping is performed by using a shaping mold in step 20 of the method according to the embodiment of the present invention;
fig. 7 is a mold closing state diagram of the stacking mold used in step 40 of the method according to the embodiment of the present invention.
The drawings are as follows: the first semi-finished machine shell 1, the bearing chamber 12, the second semi-finished machine shell 2, the third semi-finished machine shell 3, the finished machine shell 4, the stacking portion 42, the upper die insert block 54, the upper die pad block 55, the upper die push block 56, the lower die float block 57, the male die 58, the lower die insert block 59, the bearing chamber punch 510, the shaping male die 61, the shaping female die plate 62 and the shaping push block 63.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides a motor housing axial double-layer lamination forming process, which is shown in fig. 1 and comprises the following steps:
and 10, stretching and forming the raw material sheet to obtain the first semi-finished shell 1. As shown in fig. 2, the first semi-finished casing 1 has a cylindrical shape, and has a bearing chamber 12 at the top end. The error between the inner diameter of the first semi-finished casing 1 and the inner diameter of the preset casing is within a preset error range, the error between the inner diameter of the bearing chamber 12 of the first semi-finished casing and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber 12 of the first semi-finished casing and the outer diameter of the preset bearing chamber is within a preset error range.
Wherein, the raw material sheet can be round, elliptic or rectangular, preferably round, so that the drawing is convenient to form a cylindrical shell, the material flow is facilitated, and the thinning condition of the material in the drawing process is reduced.
And step 20, shaping the first semi-finished shell 1 to obtain a second semi-finished shell 2. As shown in fig. 3, the error between the height of the second semi-finished casing 2 and the height before the preset stacking is within a preset error range.
Specifically, the first semi-finished casing 1 is shaped by a shaping die. As shown in fig. 6, the shaping mold comprises a shaping male mold 61, a shaping female mold plate 62 and a shaping push block 63, and the height of the shaped second semi-finished shell is ensured to meet the preset requirement by adjusting the thickness of the shaping female mold plate, the height of the shaping push block and the height of the shaping male mold. The height before the preset stacking is calculated according to the material volume of the finished shell, and fine adjustment is carried out in the process of testing the die.
Step 30, cutting off the bottom edge of the second semi-finished casing 2 to obtain a third semi-finished casing 3, as shown in fig. 4.
And step 40, stretching the side wall shell of the third semi-finished shell 3 along the radial direction far away from the axis direction, so that the side wall shells are overlapped in the axial direction to form a material overlapping part 42, and the finished shell 4 meeting the preset requirements is obtained, as shown in fig. 5.
According to the method, the shell with the bearing chamber is formed by stretching and forming, then stacking and forming are carried out, and the finished shell is obtained by stretching and forming for multiple times, so that materials can flow more stably in the forming process, the reduction rate of the wall thickness of the shell is reduced, the thickness requirement on a raw material sheet is reduced, raw materials are saved, and the cost is reduced. Before stacking, the method of the embodiment of the invention enables the inner diameter of the shell and the inner diameter and the outer diameter of the bearing to meet preset requirements, then the height of the shell is shaped according to the preset height before stacking, the volume stability before stacking is ensured, the inner diameter of the shell is not influenced by material flow when stacking is ensured, the outer diameter of stacking and the height of the shell after stacking are easier to control, the finished shell is ensured to meet the preset requirements, and the deviation between the inner diameter of the finished shell and the preset inner diameter is within 0.05 mm.
Preferably, in step 30, the bottom edge of the second semi-finished casing is cut off using a fine blanking process. The fine impact extrusion breaking process can ensure that the outer edge of the shell can not protrude, and avoid scraps in the subsequent hemming process.
Preferably, in step 10, the sheet of material is first stretched to form an initial cylindrical shell. And stretching the initial cylindrical shell, reducing the inner diameter of the initial cylindrical shell, and increasing the height of the initial cylindrical shell to obtain the initial shell, wherein the error between the inner diameter of the initial shell and the inner diameter of the preset shell is within a preset error range. And then stretching the top end of the initial shell to form a bearing chamber 12 meeting the preset requirement, so that the error between the inner diameter of the bearing chamber and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber and the outer diameter of the preset bearing chamber is within a preset error range, thereby obtaining the first semi-finished shell 1.
Further preferably, in step 10, each stretching is extrusion-stretch-molded using a different molding die.
In the embodiment, a thinning and stretching process is adopted, the raw material sheet is stretched and molded according to the thinning rate of 8%t to form a first semi-finished shell, the wall thickness of the molded shell is ensured to be uniform and stable, and the wall thickness difference can be controlled within 0.03 mm.
Preferably, in step 40, the third semi-finished product shell 3 is extruded by using a stacking mold through pressure, so that a stacking portion is formed at a preset height position of the third semi-finished product shell, and the stacking portion is subjected to overpressure, so that two layers of shells of the stacking portion are attached, and an error between the outer diameter of the stacking portion and a preset stacking outer diameter is within a preset error range, so as to obtain the finished product shell 4 meeting preset requirements.
In the method, the material stacking part is formed by extrusion molding of the material stacking die, and the round angle between the two layers of shells of the material stacking part is reduced by overpressure, namely, the outer wall of the joint of the two layers of shells of the material stacking part forms a smaller arc, so that the material is extruded more tightly, the two layers of shells of the material stacking part are attached, and the seamless material stacking part is ensured. Specifically, the stacking mold is provided with a stacking cavity for forming a stacking part, and the depth of the stacking cavity is designed according to the wall thickness of the shell of the third semi-finished shell, so that the material is pressed during stacking to ensure that no gap exists between the shells on two sides of the stacking part. For example, the wall thickness of the shell of the third semi-finished product shell is 1.6mm, the thickness of the stacking part after theoretical stacking is 3.2mm, and the depth of the stacking cavity of the stacking die is 3.15mm to realize seamless stacking, so that the material is over-pressed.
Preferably, as shown in fig. 7, the stacking mold includes an upper molding block 54 and a lower molding block 59, and a stacking cavity for forming a stacking portion is provided at the bottom end of the upper molding block 54.
In step 40, when the upper and lower molding blocks 54 and 59 are closed, the bottom end face of the upper molding block is flush with the bottom end face of the formed stack portion, and the top end face of the lower molding block is flush with the bottom end face of the formed stack portion.
In the method of the embodiment, in the stacking procedure, a stacking cavity for forming a stacking part is arranged in an upper die-in block, the interface between the upper die-in block and a lower die-in block is positioned at the end face of the bottom end of the stacking part, and when materials are radially moved after being axially extruded, the outer edge of the stacking part cannot generate a circle of indentation due to contact with the interface.
Preferably, in step 40, the inner diameter of the third semi-finished casing 3, the inner diameter of the bearing chamber and the outer diameter of the bearing chamber are kept unchanged, and the sidewall casing of the third semi-finished casing is stretched in a direction away from the axis in the radial direction, so that the sidewall casing is overlapped in the axial direction to form the overlapped part 42, and the finished casing 4 meeting the preset requirements is obtained.
Specifically, as shown in fig. 7, the stacking mold includes an upper mold assembly and a lower mold assembly, and the upper mold assembly is connected with the punch press. The upper die assembly includes an upper die entry block 54, an upper die pad block 55 and an upper die push block 56, and the lower die assembly includes a lower die entry block 59, a lower die float block 57, a punch 58 and a bearing chamber punch 510.
When the mold is closed, the manipulator places the third semi-finished shell into the lower mold assembly, the male mold 58 fixes the shell inner diameter, the bearing chamber punch 510 fixes the bearing chamber inner diameter, and the lower mold insert 59 axially supports the bottom of the shell and radially controls the outer diameter of the shell. The upper die assembly is depressed, and first the upper die pad 55 contacts the top of the housing for support, the upper insert block 54 contacts the shoulder of the housing for support, and the upper push block 56 contacts the top of the bearing housing for support. Through the stroke change that the punch press pushed down, go up the mould and go into the module 54 and extrude the unnecessary material of casing axial to radial movement, the punch press pushes down the stroke back in place, goes up the mould and goes into the module and close with the lower mould, goes into the terminal surface butt of module bottom and lower mould top promptly, and the casing axial forms the material portion of folding.
When the die is opened, the punch is lifted, and a spring device is arranged on the back surface of the upper die cushion block 55, so that the stacked shell can be smoothly pulled out from the upper die insert block 54. The back of the upper die pushing block 56 is provided with a spring device, and after the die is opened, the bearing chamber part of the shell is smoothly separated from the upper die pad block 55 by the spring force. The lower die floating block 57 releases the shell from the bearing chamber punch 510 after die opening, a nitrogen spring is arranged on the back surface of the male die 58, and the shell is smoothly released from the lower die entering block 59 by the force of the nitrogen spring after die opening. Therefore, the finished product shell can be smoothly separated from the stacking die, and the manipulator can conveniently grasp the finished product shell smoothly and convey the finished product shell to the next station.
Preferably, step 40 further includes:
the bottom edge of the third semi-finished casing 3 is deburred.
Further preferably, in step 40, the third semi-finished casing 3 is pressed by using a stacking mold, so that a stacking portion with an outer diameter being a preset stacking outer diameter is formed at a preset height position of the third semi-finished casing, and burrs at the bottom edge of the third semi-finished casing 3 are removed, so as to obtain a finished casing 4 meeting preset requirements.
Further preferably, the stacking die comprises an upper die-in block 54 and a lower die-in block 59 which are matched, and as shown in fig. 7, a chamfer is arranged at a position of the lower die-in block 59 corresponding to the bottom of the third semi-finished shell.
In step 40, the bottom edge of the third semi-finished casing 3 is deburred during the pressing of the mold by chamfering of the lower mold block 59.
In the above embodiment, the same nesting mold is utilized, and in the same extrusion molding process, the stacking portion with the outer diameter being the preset stacking outer diameter is formed at the preset height position of the third semi-finished product shell, and the bottom edge burrs of the third semi-finished product shell 3 are removed at the same time, so that the process flow is simplified, and the molding efficiency is improved.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention.
Claims (5)
1. The process for forming the motor housing axial double-layer laminated material is characterized by comprising the following steps of:
step 10, stretching and forming the raw material sheet to obtain a first semi-finished shell (1); the first semi-finished shell (1) is cylindrical, and the top end of the first semi-finished shell is provided with a bearing chamber (12); the error between the inner diameter of the first semi-finished shell (1) and the inner diameter of the preset shell is within a preset error range, the error between the inner diameter of the bearing chamber (12) of the first semi-finished shell and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber (12) of the first semi-finished shell and the outer diameter of the preset bearing chamber is within a preset error range;
step 20, shaping the first semi-finished shell (1) to obtain a second semi-finished shell (2); the error between the height of the second semi-finished shell (2) and the height before the preset stacking is within a preset error range;
step 30, cutting off the bottom edge of the second semi-finished shell (2) to obtain a third semi-finished shell (3);
step 40, stretching the side wall shell of the third semi-finished product shell (3) along the radial direction far away from the axis direction, so that the side wall shell is overlapped in the axial direction to form a material overlapping part (42), and a finished product shell (4) meeting the preset requirements is obtained; the wall thickness of the shell of the third semi-finished shell is 1.6mm;
in the step 40, the third semi-finished product shell (3) is extruded by using a stacking die through pressure, so that a stacking part is formed at a preset height position of the third semi-finished product shell, and the stacking part is subjected to overpressure, so that two layers of shells of the stacking part are attached, and an error between the outer diameter of the stacking part and the preset stacking outer diameter is within a preset error range, so that a finished product shell (4) meeting preset requirements is obtained;
the stacking die comprises an upper die inlet block (54) and a lower die inlet block (59) which are matched, and a stacking cavity for forming a stacking part is formed at the bottom end of the upper die inlet block (54);
in the step 40, when the upper molding block (54) and the lower molding block (59) are closed, the bottom end of the upper molding block is flush with the bottom end of the stacking portion, and the top end of the lower molding block is flush with the bottom end of the stacking portion;
specifically, the manipulator puts the third semi-finished shell into a lower die assembly, a male die (58) fixes the inner diameter of the shell, a bearing chamber punch (510) fixes the inner diameter of the bearing chamber, a lower die inlet block (59) axially supports the bottom of the shell, and radially controls the outer diameter of the shell; the upper die assembly is pressed down, firstly, an upper die cushion block (55) contacts the top of the shell to play a supporting role, an upper die insert block (54) contacts the shoulder of the shell to play a supporting role, and an upper die push block (56) contacts the top end of the bearing chamber to play a supporting role; the upper die inlet block (54) extrudes redundant materials axially of the shell to move radially through the change of the downward stroke of the punch, and after the downward stroke of the punch is in place, the upper die inlet block and the lower die inlet block are closed, the end face of the bottom end of the upper die inlet block is abutted with the end face of the top end of the lower die inlet block, and a material stacking part is axially formed on the shell;
the step 40 further includes:
removing burrs on the bottom edge of the third semi-finished shell (3);
in the step 40, the third semi-finished product shell (3) is extruded by using a stacking die through pressure, burrs at the bottom edge of the third semi-finished product shell (3) are removed, and meanwhile, a stacking part with the outer diameter being a preset stacking outer diameter is formed at the preset height position of the third semi-finished product shell, so that a finished product shell (4) meeting preset requirements is obtained;
the lower die inlet block (59) is provided with a chamfer at a position corresponding to the bottom of the third semi-finished product shell;
in the step 40, the bottom edge burrs of the third semi-finished shell (3) are removed by chamfering of the lower die-in block (59).
2. The process of claim 1, wherein in step 30, the bottom edge of the second semi-finished shell is cut by a fine blanking process.
3. The process for forming an axial double-layer laminated material for a motor casing according to claim 1, wherein in step 10, a raw material sheet is stretched to form a cylindrical casing; stretching the cylindrical shell at least twice, wherein each stretching reduces the inner diameter of the cylindrical shell, and increases the height of the cylindrical shell until the error between the inner diameter of the cylindrical shell and the inner diameter of the preset shell is within a preset error range; and then stretching the top end of the cylindrical shell to form a bearing chamber (12) meeting preset requirements, so that the error between the inner diameter of the bearing chamber and the inner diameter of the preset bearing chamber is within a preset error range, and the error between the outer diameter of the bearing chamber and the outer diameter of the preset bearing chamber is within a preset error range, thereby obtaining the first semi-finished shell (1).
4. A process for forming an axial double laminate for a motor casing according to claim 3, wherein in step 10, each stretching is extrusion-stretch-formed using a different forming die.
5. The process for forming the axial double-layer laminated material of the motor housing according to claim 1, wherein in the step 40, the sidewall shell of the third semi-finished product housing is stretched in a direction away from the axis in a radial direction, so that when the sidewall shell is overlapped in the axial direction to form the laminated portion (42), the inner diameter of the third semi-finished product housing (3) and the inner diameter and the outer diameter of the bearing chamber are kept unchanged, and the finished product housing (4) meeting preset requirements is obtained.
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| CN202310668023.9A CN116393586B (en) | 2023-06-07 | 2023-06-07 | Motor shell axial double-layer laminated material forming process |
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