CN105057636A - Steel bushing inlay casting method for motor casing front and rear end covers and front and rear end covers - Google Patents
Steel bushing inlay casting method for motor casing front and rear end covers and front and rear end covers Download PDFInfo
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- CN105057636A CN105057636A CN201510466425.6A CN201510466425A CN105057636A CN 105057636 A CN105057636 A CN 105057636A CN 201510466425 A CN201510466425 A CN 201510466425A CN 105057636 A CN105057636 A CN 105057636A
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- steel bushing
- motor casing
- rear cover
- casing front
- end covers
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 114
- 239000010959 steel Substances 0.000 title claims abstract description 114
- 238000005266 casting Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000004512 die casting Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004411 aluminium Substances 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Abstract
The invention discloses a steel bushing inlay casting method for motor casing front and rear end covers. The method comprises the steps that 1 a steel sleeve is manufactured; 2 the steel sleeve is heated through high-frequency plasma; 3 the steel sleeve is placed into a lower mold of a low-pressure casting apparatus and positioned, molten aluminum is injected into a mold from bottom to top, and the steel sleeve is covered with molten aluminum; and 4 a separation line is formed between the steel sleeve and an end cover. The invention further discloses the motor casing front and rear end covers. Compared with front and rear end covers of a permanent magnet servo motor of an existing new energy automobile, the motor casing front and rear end covers are cast with aluminum alloy under low pressure and are formed at one time, and the motor casing front and rear end covers have smooth appearance and clear arcs; because the steel sleeve is inlaid in a bearing, the problem that a bearing deforms due to heat is solved, the hardness of a bearing position is increased, and weight is reduced by 40% compared with an integrally machined steel part or a ball iron part; and a machine base is made of the same aluminum alloy as the end covers, the aluminum alloy has a better heat dissipation effect than steel parts, the motor has an attractive appearance, and labor cost is reduced by 20%.
Description
Technical field
The present invention relates to technical field prepared by motor casing end cap, be specifically related to a kind of motor casing front and rear cover edge steel bushing casting method, and implement the front and rear cover of this preparation method.
Background technology
Traditional electrical casing front and back ends lid adopt steel plate machine-shaping and Ductile Iron Casting shaping, processing cost is high, complex process, and product is heavy, and radiating effect is bad.Inlay steel bushing employing to cast for the core casting motor in electric automobile end cap, complex process.
Summary of the invention
This invention is not enough for current art, provides a kind of motor casing front and rear cover to inlay steel bushing casting method, one-shot forming, product design is smooth, camber line is clearly demarcated, position of bearings edge steel bushing, solve bearing be heated bearing position distortion problem, add the hardness of bearing position.
The present invention also provides a kind of front and rear cover implementing this casting method.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of motor casing front and rear cover edge steel bushing casting method, it is characterized in that, it comprises the following steps:
(1) prepare steel bushing, steel bushing is provided with anticreep groove and anti-slip tank;
(2) heated 8 ~ 12 seconds by high frequency plasma by steel bushing, steel bushing temperature reaches more than 400 DEG C;
(3) steel bushing after step (2) being heated to be placed in the counterdie of low-pressure die casting plant and to locate, 700 DEG C of molten aluminum water are upwards injected into mould from mold bottom, be pressurized to 800Mpa, pressurize 550MPa, make the coated steel bushing of aluminium water, aluminium water condensation forms the end cap that density is high, intensity is high, stability is high, and shaping end cap is embraced in patrix, during the demoulding, thimble ejects steel bushing from top to bottom, and end cap comes off;
(4) step (3) forms defiber between steel bushing and end cap, and bearing position runs up for a long time, and the heat of generation is delivered on bearing position steel bushing, and steel bushing has fallen thermal release in defiber position.
Described step (2) specifically also comprises following content: arrange high-frequency plasma generation equipment, be made up of two coaxial quartz tubes, outer tube sleeve has a helix tube be entwined by thin copper pipe, pass to high frequency electric, high-frequency alternating magnetic field is produced in helix tube, magnetic flux change induces electromotive force, and this electromotive force responds to generation current and corresponding heat in conducting medium, makes the steel bushing being positioned at equipment be heated to assigned temperature rapidly.
Described step (3) specifically also comprises following content: in low-pressure die casting plant, arrange the liquid level pressurizing control system based on Fuzzy Adaptive PID, fuzzy reasoning is carried out according to fuzzy control rule, online pid parameter is revised, this control system comprises PLC, analog input/output module, pressure transmitter, servo electromagnetic valve, this set-up of control system, in low-pressure die casting plant, ensures in low pressure die casting process and the force value of pressure maintaining period reaches setting numerical value.
Described step (3) specifically also comprises following content: fuzzy control rule concrete methods of realizing is: △ K off-line calculation obtained
p, △ K
iwith △ K
dfuzzy control table be kept in data block DB30, DB31 and DB32 respectively, periodic interruptions tissue block OB30 calls the subprogram FC61 of inquiry fuzzy control table every 40ms, and FC61, according to the quantized value of e and ec inquiry fuzzy control table, obtains △ K
p, AK
iwith △ K
dquantized value.
In described step (2), specifically also comprise following content: heating plasma equipment is set, by the electromagnetic induction coupled plasma of heating plasma equipment, superhigh temperature Fast Heating is carried out to steel bushing.
In described step (3), specifically also comprise following content: by the CFD fluid emulation module in the ANSYS finite element software of computer and Thermal module, change of temperature field simulation model is closed in the flow field set up in the low pressure casting filling and solidification processess of the end cap embedding different temperatures steel bushing, numerical simulation calculation is adopted to obtain the flow regime of liquid metal in casting mold, pressure distribution, VELOCITY DISTRIBUTION and Temperature Distribution, the volume gas that prediction foundry goods exists, slag inclusion, the defect of shrinkage porosite and shrinkage cavity, and analyze the steel bushing temperature obtained needed for actual production, pouring pressure, with the technological parameter of pouring temperature, the technological parameter of pouring pressure is sent in liquid level pressurizing control system, control the pressure of cast.
A kind of front and rear cover implementing above-mentioned motor casing front and rear cover edge steel bushing casting method, it comprises steel bushing, and by low pressure casting, is coated on the end cap of steel bushing periphery, described steel bushing is provided with anticreep groove and anti-rotation groove, and described end cap is formed and anticreep groove and the suitable card convex of anti-rotation groove.
Described steel bushing is hollow circuit cylinder body structure, and described anticreep groove is be arranged on the circumferential groove in the middle part of steel bushing outer wall, and described anti-rotation groove is the vertical groove be arranged on steel bushing outer wall, and anti-rotation groove is communicated with anticreep groove, and the length of described anti-rotation groove is the half of steel bushing thickness.
Described steel bushing outer wall arranges many anti-rotation grooves uniformly, and many anti-rotation grooves are arranged on the same side of anticreep groove, or are arranged on the both sides of anticreep groove.
Be arranged on many anti-rotation groove alignment of the both sides of anticreep groove or shift to install.
Beneficial effect of the present invention: for the forward and backward end cap of existing new-energy automobile permanent-magnet servo motor, adopt the casting of low pressure aluminium alloy, one-shot forming, product design is smooth, camber line is clearly demarcated; In order to gain in strength, position of bearings edge steel bushing, solve bearing be heated bearing position distortion problem, add the hardness of bearing position.
Low pressure casting principle, reaches 400 degree by high frequency plasma heating steel bushing, is put on mould location, aluminium water flow is wrapped steel bushing, fuses into one, alleviate the weight of 40%, just achieve the instructions for use of product than the steel part of overall processing or G. Iron Castings.
The end cap of aluminium matter becomes defiber with steel bushing similar shape, bearing position runs up for a long time, the heat produced is delivered on bearing position steel bushing, steel bushing has fallen thermal release in defiber position, such guarantee motor operate for a long time bearing invariant position shape, do not wear and tear, support uses same materials of aluminum alloy with end cap, and aluminium alloy is than the good heat dissipation effect of steel part, motor good looking appearance, has saved the cost of labor of 20%.
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in more detail.
Accompanying drawing explanation
Fig. 1 is the steel bushing of the present embodiment and the structural representation of counterdie;
Fig. 2 is the cross-sectional view that the steel bushing of the present embodiment is placed on counterdie;
Fig. 3 is the structural representation of the steel bushing of the present embodiment;
Fig. 4 is the structural representation of the end cap of the present embodiment.
In figure: 1. steel bushing, 11. anticreep grooves, 12. anti-rotation grooves, 2. end cap, 3. counterdie.
Detailed description of the invention
Embodiment, see Fig. 1 ~ 4, the motor casing front and rear cover edge steel bushing casting method that the present embodiment provides, it comprises the following steps:
(1) prepare steel bushing 1, steel bushing 1 is provided with anticreep groove 11 and anti-slip tank;
(2) arrange heating plasma equipment, carry out superhigh temperature Fast Heating by the electromagnetic induction coupled plasma of heating plasma equipment to steel bushing 1, by steel bushing 1 by high frequency plasma heating 8 ~ 12 seconds, steel bushing 1 temperature reaches more than 400 DEG C; High-frequency plasma generation equipment is set, be made up of two coaxial quartz tubes, outer tube sleeve has a helix tube be entwined by thin copper pipe, pass to high frequency electric, high-frequency alternating magnetic field is produced in helix tube, magnetic flux change induces electromotive force, and this electromotive force responds to generation current and corresponding heat in conducting medium, makes the steel bushing 1 of the equipment that is positioned at be heated to assigned temperature rapidly;
(3) steel bushing 1 after step (2) being heated to be placed in the counterdie 3 of low-pressure die casting plant and to locate, 700 DEG C of molten aluminum water are upwards injected into mould from mold bottom, be pressurized to 800Mpa, pressurize 550MPa, make the coated steel bushing 1 of aluminium water, aluminium water condensation forms the end cap 2 that density is high, intensity is high, stability is high, and shaping end cap 2 armfuls is in patrix, during the demoulding, thimble ejects steel bushing 1 from top to bottom, and end cap 2 comes off; Different from general low pressure casting force value 400Mpa, the present invention is pressurized to 800Mpa, pressurize 550MPa, namely ensure that end cap 2 density after coagulation forming is high, intensity is high, stability is high, ensure that end cap 2 is good with the conjugation of steel bushing 1 simultaneously, and make the end cap after coagulation forming 2 hold tightly on patrix, be convenient to the follow-up demoulding;
Liquid level pressurizing control system based on Fuzzy Adaptive PID is set in low-pressure die casting plant, fuzzy reasoning is carried out according to fuzzy control rule, online pid parameter is revised, this control system comprises PLC, analog input/output module, pressure transmitter, servo electromagnetic valve, this set-up of control system, in low-pressure die casting plant, ensures in low pressure die casting process and the force value of pressure maintaining period reaches setting numerical value;
By the CFD fluid emulation module in the ANSYS finite element software of computer and Thermal module, change of temperature field simulation model is closed in the flow field set up in the low pressure casting filling and solidification processess of the end cap 2 embedding different temperatures steel bushing 1, numerical simulation calculation is adopted to obtain the flow regime of liquid metal in casting mold, pressure distribution, VELOCITY DISTRIBUTION and Temperature Distribution, the volume gas that prediction foundry goods exists, slag inclusion, the defect of shrinkage porosite and shrinkage cavity, and analyze steel bushing 1 temperature (more than 400 DEG C) obtained needed for actual production, pouring pressure (is pressurized to 800Mpa, pressurize 550MPa), with the technological parameter of pouring temperature (700 DEG C), the technological parameter of pouring pressure is sent in liquid level pressurizing control system, control the pressure of cast,
(4) form defiber between step (3) steel bushing 1 and end cap 2, bearing position runs up for a long time, and the heat of generation is delivered on bearing position steel bushing 1, and steel bushing 1 has fallen thermal release in defiber position.
High frequency plasma heating work principle is when flowing through oxygen in pipe, gas is ionized generation electrodless discharge, form plasma arc, this plasma arc is stably constrained in the space of generator. now, the fresh oxygen flowing into generator is constantly ionized, and produces the plasma arc of 8000 ~ 11000K, and leaves the plasma constantly compound of arc region, gas around the energy warms discharged, thus make the oxygen flowing through light fixture be heated to temperature required for reaction.
Existing liquid level pressurizing control system many employings PID (ratio, differential, integration) controls, and the quality of PID control system performance depends on pid parameter K
p, K
iand K
dthe degree of accuracy, obtain K accurately
p, K
iand K
dparameter request sets up accurate Mathematical Modeling, and low pressure casting compression system is a large time delay, nonlinear time-varying system, is difficult to set up Mathematical Modeling accurately.Further, due in low pressure casting production process, the existence of the disturbing factors such as liquid level decline, temperature fluctuation and supply gas pressure change, even if obtain K more accurately
p, K
iand K
dparameter, fixing K
p, K
iand K
dparameter can not make whole control procedure reach optimum.Traditional PID liquid level pressurizing control system exists large, the actual pressuring curve of pressure oscillation in actual production can not the shortcoming such as tracing preset pressuring curve very well, causes casting quality difference and unstable.Artificial intelligence controls to combine with PID by the liquid level pressurizing control system based on Fuzzy Adaptive PID of the present invention, according to the continuous on-line amending K of the working condition of low pressure casting
p, K
iand K
dparameter, can meet different pressure divergence e and pressure divergence rate of change ec to the requirement of PID Self-tuning System, improves dynamic property and the control accuracy of low-pressure casting liquid level pressurization.
Fuzzy control rule concrete methods of realizing is: △ K off-line calculation obtained
p, △ K
iwith △ K
dfuzzy control table be kept in data block DB30, DB31 and DB32 respectively, periodic interruptions tissue block OB30 calls the subprogram FC61 of inquiry fuzzy control table every 40ms, and FC61, according to the quantized value of e and ec inquiry fuzzy control table, obtains △ K
p, AK
iwith △ K
dquantized value.
For the forward and backward end cap 2 of existing new-energy automobile permanent-magnet servo motor, adopt the casting of low pressure aluminium alloy, one-shot forming, product design is smooth, camber line is clearly demarcated; In order to gain in strength, position of bearings edge steel bushing 1, solve bearing be heated bearing position distortion problem, add the hardness of bearing position.
Low pressure casting principle, reaches 400 degree by high frequency plasma heating steel bushing 1, is put on mould location, aluminium water flow is wrapped steel bushing 1, fuses into one, alleviate the weight of 40%, just achieve the instructions for use of product than the steel part of overall processing or G. Iron Castings.
The end cap 2 of aluminium matter becomes defiber with steel bushing 1 similar shape, bearing position runs up for a long time, the heat produced is delivered on bearing position steel bushing 1, steel bushing 1 has fallen thermal release in defiber position, such guarantee motor operate for a long time bearing invariant position shape, do not wear and tear, support uses same materials of aluminum alloy with end cap 2, and aluminium alloy is than the good heat dissipation effect of steel part, motor good looking appearance, has saved the cost of labor of 20%.
The present embodiment also provides a kind of front and rear cover 2, and it comprises steel bushing 1, and by low pressure casting, be coated on the end cap 2 of steel bushing 1 periphery, described steel bushing 1 is provided with anticreep groove 11 and anti-rotation groove 12, and described end cap 2 is formed and anticreep groove 11 and the suitable card convex of anti-rotation groove 12.
Described steel bushing 1 is hollow circuit cylinder body structure, described anticreep groove 11 is for being arranged on the circumferential groove in the middle part of steel bushing 1 outer wall, described anti-rotation groove 12 is for being arranged on the vertical groove on steel bushing 1 outer wall, and anti-rotation groove 12 is communicated with anticreep groove 11, and the length of described anti-rotation groove 12 is the half of steel bushing 1 thickness.
Described steel bushing 1 outer wall arranges many anti-rotation grooves 12 uniformly, and many anti-rotation grooves 12 are arranged on the same side of anticreep groove 11, or are arranged on the both sides of anticreep groove 11.
Many the anti-rotation grooves 12 being arranged on the both sides of anticreep groove 11 align or shift to install.
The present invention is not limited to above-mentioned embodiment, adopts or approximation method identical with the above embodiment of the present invention or device, and other motor casing front and rear covers edge steel bushing casting method obtained and front and rear cover, all within protection scope of the present invention.
Claims (10)
1. a motor casing front and rear cover edge steel bushing casting method, it is characterized in that, it comprises the following steps:
(1) prepare steel bushing, steel bushing is provided with anticreep groove and anti-slip tank;
(2) heated 8 ~ 12 seconds by high frequency plasma by steel bushing, steel bushing temperature reaches more than 400 DEG C;
(3) steel bushing after step (2) being heated to be placed in the counterdie of low-pressure die casting plant and to locate, 700 DEG C of molten aluminum water are upwards injected into mould from mold bottom, be pressurized to 800Mpa, pressurize 550MPa, make the coated steel bushing of aluminium water, aluminium water condensation forms the end cap that density is high, intensity is high, stability is high, and shaping end cap is embraced in patrix, during the demoulding, thimble ejects steel bushing from top to bottom, and end cap comes off;
(4) step (3) forms defiber between steel bushing and end cap, and bearing position runs up for a long time, and the heat of generation is delivered on bearing position steel bushing, and steel bushing has fallen thermal release in defiber position.
2. motor casing front and rear cover edge steel bushing casting method according to claim 1, it is characterized in that, described step (2) specifically also comprises following content: arrange high-frequency plasma generation equipment, be made up of two coaxial quartz tubes, outer tube sleeve has a helix tube be entwined by thin copper pipe, pass to high frequency electric, high-frequency alternating magnetic field is produced in helix tube, magnetic flux change induces electromotive force, this electromotive force responds to generation current and corresponding heat in conducting medium, makes the steel bushing being positioned at equipment be heated to assigned temperature rapidly.
3. motor casing front and rear cover edge steel bushing casting method according to claim 1, it is characterized in that, described step (3) specifically also comprises following content: in low-pressure die casting plant, arrange the liquid level pressurizing control system based on Fuzzy Adaptive PID, fuzzy reasoning is carried out according to fuzzy control rule, online pid parameter is revised, this control system comprises PLC, analog input/output module, pressure transmitter, servo electromagnetic valve, this set-up of control system is in low-pressure die casting plant, ensure in low pressure die casting process and the force value of pressure maintaining period reaches setting numerical value.
4. motor casing front and rear cover edge steel bushing casting method according to claim 3, it is characterized in that, described step (3) specifically also comprises following content: fuzzy control rule concrete methods of realizing is: △ K off-line calculation obtained
p, △ K
iwith △ K
dfuzzy control table be kept in data block DB30, DB31 and DB32 respectively, periodic interruptions tissue block OB30 calls the subprogram FC61 of inquiry fuzzy control table every 40ms, and FC61, according to the quantized value of e and ec inquiry fuzzy control table, obtains △ K
p, AK
iwith △ K
dquantized value.
5. motor casing front and rear cover edge steel bushing casting method according to claim 1, it is characterized in that, in described step (2), specifically also comprise following content: heating plasma equipment is set, by the electromagnetic induction coupled plasma of heating plasma equipment, superhigh temperature Fast Heating is carried out to steel bushing.
6. motor casing front and rear cover edge steel bushing casting method according to claim 3, it is characterized in that, in described step (3), specifically also comprise following content: by the CFD fluid emulation module in the ANSYS finite element software of computer and Thermal module, change of temperature field simulation model is closed in the flow field set up in the low pressure casting filling and solidification processess of the end cap embedding different temperatures steel bushing, numerical simulation calculation is adopted to obtain the flow regime of liquid metal in casting mold, pressure distribution, VELOCITY DISTRIBUTION and Temperature Distribution, the volume gas that prediction foundry goods exists, slag inclusion, the defect of shrinkage porosite and shrinkage cavity, and analyze the steel bushing temperature obtained needed for actual production, pouring pressure, with the technological parameter of pouring temperature, the technological parameter of pouring pressure is sent in liquid level pressurizing control system, control the pressure of cast.
7. one kind implements the claims the front and rear cover of one of 1 to 6 described motor casing front and rear cover edge steel bushing casting method, it is characterized in that, it comprises steel bushing, and pass through low pressure casting, be coated on the end cap of steel bushing periphery, described steel bushing is provided with anticreep groove and anti-rotation groove, and described end cap is formed and anticreep groove and the suitable card convex of anti-rotation groove.
8. front and rear cover according to claim 7, it is characterized in that, described steel bushing is hollow circuit cylinder body structure, described anticreep groove is be arranged on the circumferential groove in the middle part of steel bushing outer wall, described anti-rotation groove is the vertical groove be arranged on steel bushing outer wall, anti-rotation groove is communicated with anticreep groove, and the length of described anti-rotation groove is the half of steel bushing thickness.
9. front and rear cover according to claim 8, is characterized in that, described steel bushing outer wall arranges many anti-rotation grooves uniformly, and many anti-rotation grooves are arranged on the same side of anticreep groove, or are arranged on the both sides of anticreep groove.
10. front and rear cover according to claim 9, is characterized in that, is arranged on many anti-rotation groove alignment of the both sides of anticreep groove or shifts to install.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109570481A (en) * | 2018-03-01 | 2019-04-05 | 北京航大新材科技有限公司 | A kind of pneumatic melt transport packet system and melt conveying method |
| CN109722575A (en) * | 2019-01-30 | 2019-05-07 | 山东鸿源新材料有限公司 | The production technology of new-energy automobile driving motor end cap |
| CN109732061A (en) * | 2019-02-22 | 2019-05-10 | 秦皇岛中秦渤海轮毂有限公司 | A kind of built-in steel bushing aluminium casting cast moulding method |
| CN110328348A (en) * | 2019-06-27 | 2019-10-15 | 广东银迪压铸有限公司 | A kind of production method of New energy automobile motor aluminum enclosure |
| CN112658228A (en) * | 2020-12-30 | 2021-04-16 | 江苏文灿压铸有限公司 | Low-pressure casting process of motor casing of new energy automobile |
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