A processing technology and device suitable for a new energy motor shell assembly

Abstract

This invention discloses a processing technology and apparatus suitable for new energy vehicle motor housing assemblies, belonging to the field of new energy vehicle manufacturing technology. The process includes the following steps: rough machining of the wing plate and the second open end; rough machining of the combined end face of the steel sleeve flush with the stepped hole; rough machining of the small-diameter inner ring wall of the steel sleeve; finish machining of the first reference surface and the end face of the stepped hole away from the receiving chamber; and finish machining of the outer wall surface of the motor housing assembly between the wing plate and the first open end; finish machining of the bottom end face of the steel sleeve, semi-finish machining of the inner wall surface of the steel sleeve, and then finish machining of the inner wall surface of the steel sleeve; further finish machining of the small-diameter inner ring wall of the steel sleeve and the through hole on the bottom plate; and inspection of the through hole. The processing technology and apparatus provided by this invention can adapt to motor housing assemblies with localized reinforcement requirements. It can not only achieve accurate machining of the aluminum alloy area of ​​the motor housing assembly, but also complete high-precision machining of the reinforced area, thereby ensuring the finished quality of the motor housing assembly.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle manufacturing technology, specifically relating to a processing technology and apparatus suitable for new energy motor housing assemblies. Background Technology

[0002] With the rapid development of new energy vehicles and the improvement of people's living standards, new energy vehicles have been widely used in daily life and industrial production, and their application fields and forms are becoming more and more diverse.

[0003] Existing electric vehicle motor housing assemblies are generally made of aluminum alloy castings, which are large in size and complex in structure. At the same time, the processing requirements of the parts are also high. As the speed of electric vehicles increases rapidly, the structural strength requirements that the motor, as one of the core components driving the vehicle, needs to meet are also increasing day by day.

[0004] For electric motors in new energy vehicles with high speed requirements, the die-cast aluminum alloy motor housing assembly has a problem of insufficient local strength, especially at the motor bearing mounting location. The motor housing assembly needs to withstand high loads, and traditional aluminum alloy castings are prone to deformation damage in this area. Adding metal areas of other materials to the motor bearing mounting area would increase the complexity of the motor housing assembly structure, and the existing machining processes cannot achieve the high-precision machining required for motor housing assemblies with localized reinforcement. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a processing technology and apparatus suitable for new energy motor housing assemblies. It can adapt to motor housing assemblies with local reinforcement requirements, and can not only achieve accurate processing of the aluminum alloy area of ​​the motor housing assembly, but also complete high-precision processing of the local reinforcement area, thereby ensuring the finished product quality of the motor housing assembly.

[0006] To achieve the above objectives, the present invention provides a processing technology suitable for new energy motor housing assemblies, used for processing motor housing assemblies with locally reinforced areas, the processing technology including the following steps: S1. Mount the motor housing assembly blank onto the first machining fixture; The motor housing assembly has an axially extending receiving chamber inside. One end of the receiving chamber is a first open end. A wing plate is provided around the first open end. The wing plate has a first reference surface facing the first open end. The other end of the receiving chamber is provided with a bottom plate with a locally reinforced area. Both sides of the base plate are provided with connected stepped holes, and the stepped holes are provided with steel sleeves with local reinforcement function on the inner ring wall of the receiving chamber; a transmission chamber is provided on the other side of the base plate away from the first opening end, and a second opening end is provided at the end of the transmission chamber. S1. Mount the motor housing assembly blank onto the first machining fixture; S2, rough-machined wing plate and second opening end; Positioning holes are machined on the wing plate; several hole end faces and a rough textured surface are machined on the second opening end; S3, rough-machined steel sleeve and stepped hole flush combined end face; The machining allowance of the combined end face is 1mm, and it is cut in 3 layers. The machining parameters are: rotation speed S1250r / min and feed F1000mm / min. S4. Mount the motor housing assembly onto the second machining fixture; S5. Machining several through holes on the wing plate, and machining an annular groove and several annular surfaces on the inner peripheral wall of the receiving cavity; S6. Roughly machine the large-diameter inner ring wall of the steel sleeve and the bent ribs on the base plate, and rough machine the small-diameter inner ring wall of the steel sleeve. The roughing of the inner ring wall of the large diameter of the steel sleeve is carried out using a φ32 corn milling cutter with 18 carbide inserts. The machining parameters are: rotation speed S1500r / min and feed F800mm / min. S7. Mount the motor housing assembly onto the third machining fixture; S8. Finish machine the end face of the first reference surface and the stepped hole that is away from the receiving chamber; and finish machine the outer wall surface of the motor housing layer between the wing plate and the first opening end; S9. Use a cermet end mill to finish the bottom end face of the steel sleeve, and use a rough boring tool to semi-finish the inner wall surface of the steel sleeve. Then use a cermet reamer to finish the inner wall surface of the steel sleeve. Finally, use a boring tool at different speeds and feed rates to finish the small diameter inner ring wall surface of the steel sleeve and the through hole on the base plate. S10. Detect the through hole and determine whether the machining accuracy of the through hole meets the pre-fabrication requirements; if yes, then complete the machining; if no, then determine the compensation machining parameters according to the detection structure, and compensate the machining of the through hole according to the compensation machining parameters.

[0007] As a further preferred embodiment of the present invention, S2 further includes the following steps: machining a bowl-shaped plug hole, a bowl-shaped plug hole clearance, and a plurality of screw hole end faces on the end face of the second open end.

[0008] As a further preferred embodiment of the present invention, S5 includes the following steps: Several first through holes are precision machined on the flange, several second through holes are rough machined, several first waist-shaped holes are semi-finished, and first blind holes are precision machined. A circular arc is machined on the inner peripheral wall of the receiving chamber to create a clearance. Multiple first annular surfaces, second annular surfaces, and third annular surfaces of different diameters are rough machined on the inner peripheral wall of the receiving chamber, and an annular groove between the first annular surfaces and the second annular surfaces is finish machined.

[0009] As a further preferred embodiment of the present invention, S5 further includes the following step: A connecting hole is machined on the inner wall of the receiving cavity to connect with the first blind hole; The stepped hole is rough-machined on the side wall of the transmission chamber, and the third and fourth through holes are finished on the base plate.

[0010] As a further preferred embodiment of the present invention, the finishing of the first reference surface includes the following steps: A φ50 cutter head is equipped with two PCD right-angle cutting tools and six PCD precision cutting tools to finish the first reference surface, and a φ50 polishing brush is used to remove burrs on the first reference surface.

[0011] As a further preferred embodiment of the present invention, S8 further includes the following step: Relief grooves are made on both sides of the third annular surface to finish the first, second, and third annular surfaces.

[0012] As a further preferred embodiment of the present invention, a plurality of second through holes and a plurality of first waist-shaped holes are precision machined on the wing plate.

[0013] As a further preferred embodiment of the present invention, the processing technology further includes the following steps: S11. Mount the motor housing assembly onto the fourth machining fixture; S12, Rotary motor housing assembly, with several end faces machined on the outer wall surface of the motor housing assembly, and the stamped steel surface precision machined; S13. Finish machining several third threaded holes on the outer wall surface of the wing plate; S14. Finish machine the second oblong hole on the side wall of the transmission chamber, and finish machine the through hole and threaded hole on the outer end face of the second oblong hole; then machine the bevel at the first threaded hole at the second opening end.

[0014] As a further preferred embodiment of the present invention, in step S9, the small-diameter inner ring wall of the steel sleeve is precision machined using a boring tool equipped with two PCD cutting inserts, and the machining parameters are a rotational speed of S2000 r / min and a feed rate of F400 mm / min.

[0015] This invention also discloses a processing apparatus suitable for new energy motor housing assemblies, which processes the motor housing assembly using the aforementioned processing technology suitable for new energy motor housing assemblies. The processing apparatus includes: The first machining fixture includes a first mounting plate, a plurality of first locating pins, a plurality of first supports, and a plurality of first clamping components; wherein, the first mounting plate is rotatable about the A-axis and is provided with a first machining hole penetrating the plate body; each of the first locating pins, each of the first supports, and each of the first clamping components are arranged circumferentially on the first mounting plate in the outer peripheral area of ​​the first machining hole for locking the motor housing assembly; and the first mounting plate is also provided with a plurality of peripheral machining holes for machining the areas on both sides of the wing plate; The second machining fixture includes a second mounting plate, a plurality of second locating pins, a plurality of second supports, and a plurality of second clamping components. The second mounting plate is rotatable about axis A and has a second machining hole penetrating the plate. Each second locating pin, each second support, and each second clamping component is circumferentially arranged on the second mounting plate outside the second machining hole area to lock the motor housing assembly. A pad is provided between each second clamping component and the second mounting plate to adjust the height of the second clamping block. The third machining fixture includes a third mounting plate, a plurality of third positioning pins, a plurality of third supports, and a plurality of third clamping components; wherein, the third mounting plate is perpendicular to the horizontal plane and can rotate about the B-axis, and the third mounting plate is provided with a third machining hole penetrating the plate body; each of the third positioning pins, each of the third supports, and each of the third clamping components are arranged circumferentially on the third mounting plate in the outer peripheral area of ​​the third machining hole, for locking the motor housing assembly.

[0016] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The processing technology of the present invention applicable to the new energy motor housing assembly includes the following steps: rough machining of the wing plate and the second open end; rough machining of the combined end face of the steel sleeve and the stepped hole flush; machining several through holes on the wing plate, and machining annular grooves and several annular surfaces on the inner peripheral wall of the receiving cavity; rough machining of the large-diameter inner ring wall of the steel sleeve and the curved ribs on the bottom plate, and rough machining of the small-diameter inner ring wall of the steel sleeve; finishing machining of the first reference surface and the end face of the stepped hole away from the receiving cavity; finishing machining of the outer wall of the motor housing assembly between the wing plate and the first open end; finishing machining of the bottom end face of the steel sleeve with a metal ceramic milling cutter, and semi-finishing machining of the inner wall surface of the steel sleeve with a rough boring cutter, and then finishing machining of the inner wall surface of the steel sleeve with a metal ceramic reamer; then finishing machining of the small-diameter inner ring wall surface of the steel sleeve and the through hole on the bottom plate with a boring cutter at different speeds and feed rates; and inspecting the through hole. This processing technology can adapt to motor housing assemblies with localized reinforcement requirements. It can not only accurately process the aluminum alloy areas of the motor housing assembly, but also complete high-precision processing of the reinforced areas, thereby ensuring the finished quality of the motor housing assembly.

[0017] (2) The processing technology and apparatus of the present invention, applicable to the new energy motor housing assembly, has high processing precision and good finished product quality. It employs corresponding roughing and finishing processes for different areas of the steel sleeve and its associated areas on the motor housing assembly. Furthermore, it selects appropriate roughing and finishing tools and parameters based on the processing requirements of the steel sleeve and associated areas, achieving high-precision processing of the steel sleeve area and its associated areas on the motor housing assembly. This ensures efficient processing of the motor housing assembly while significantly improving the finished product quality. Combined with the online measuring tool for the through holes on the corresponding base plate, the processing accuracy of the through holes is ensured, further improving the finished product quality. It has good prospects for promotion and application value. Attached Figure Description

[0018] Figure 1 This is a process flow diagram of the processing technology applicable to the housing assembly of a new energy motor in the embodiments of the present invention; Figure 2 This is a three-dimensional view of the motor housing assembly from a first perspective of the processing device applicable to the new energy motor housing assembly in this embodiment of the invention; Figure 3 This is a cross-sectional view of a motor housing assembly, which is a processing device applicable to new energy motor housing assemblies in this embodiment of the invention. Figure 4 This is a three-dimensional view of the motor housing assembly from a second perspective of the processing device applicable to the new energy motor housing assembly in this embodiment of the invention; Figure 5 This is a three-dimensional view of the motor housing assembly from a third perspective of the processing device applicable to the new energy motor housing assembly in this embodiment of the invention; Figure 6 This is a three-dimensional view of the motor housing assembly from the fourth perspective of the processing device applicable to the new energy motor housing assembly in this embodiment of the invention; Figure 7 This is a perspective view of the first processing fixture of the processing device applicable to the housing assembly of a new energy motor in an embodiment of the present invention; Figure 8 This is a perspective view of the first processing fixture of the processing device for processing new energy motor housing assemblies in an embodiment of the present invention after clamping; Figure 9 This is a perspective view of the second processing fixture of the processing device applicable to the housing assembly of a new energy motor in an embodiment of the present invention; Figure 10 This is a perspective view of the second processing fixture of the processing device for processing new energy motor housing assemblies in an embodiment of the present invention after clamping; Figure 11 This is a perspective view of the third processing fixture of the processing device applicable to the new energy motor housing assembly in this embodiment of the invention; Figure 12 This is a perspective view of the third processing fixture of the processing device for new energy motor housing assembly after clamping in an embodiment of the present invention; Figure 13 This is a perspective view of the fourth processing fixture of the processing device applicable to the housing assembly of a new energy motor in this embodiment of the invention; Figure 14 This is a perspective view of the fourth processing fixture of the processing device for new energy motor housing assembly after clamping, as described in this embodiment of the invention.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Motor housing assembly; 101. Wing plate; 102. Steel sleeve; 103. Positioning hole; 104. First through hole; 105. Second through hole; 106. Third through hole; 107. Fourth through hole; 108. First threaded hole; 109. Second threaded hole; 110. Third threaded hole; 111. Fourth threaded hole; 112. First annular surface; 113. Second annular surface; 114. Third annular surface; 115. First reference surface; 116. Second reference surface; 117. Through hole; 118. First waist-shaped hole; 119. Second waist-shaped hole; 120. Cup plug hole; 121. First blind hole; 122. Pin post; 123. Stamped surface; 124. Base plate; 125. Annular groove; 2. First machining fixture; 201. First mounting plate; 202. First locating pin; 203. First support; 204. First machining hole; 205. Peripheral machining hole; 3. Second machining fixture; 301. Second mounting plate; 302. Second locating pin; 303. Second support; 304. Second machining hole; 4. Third machining fixture; 401. Third mounting plate; 402. Third locating pin; 403. Third support; 404. Third machining hole; 5. Fourth machining fixture; 501. Fourth mounting plate; 502. Fourth locating pin; 6. Lever-type hydraulic cylinder; 7. Angle cylinder; 8. Support base; 9. Limiting rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Example: Please see Figures 1-14 The processing technology and apparatus for new energy motor housing assemblies in the preferred embodiment of the present invention can adapt to motor housing assemblies 1 with local reinforcement requirements. It can not only achieve accurate processing of the aluminum alloy area of ​​motor housing assembly 1, but also complete high-precision processing of the local reinforcement area, thereby ensuring the finished product quality of motor housing assembly 1.

[0026] Specifically, such as Figures 2-6 As shown in the preferred embodiment of this application, the motor housing assembly 1 has an axially extending receiving chamber. One end of the receiving chamber is a first open end, and a wing plate 101 is provided around the periphery of the first open end. The wing plate 101 has a first reference surface 115 facing the first open end. The other end of the receiving chamber is provided with a base plate 124 having a locally reinforced area. Both sides of the base plate 124 are provided with communicating stepped holes. A steel sleeve 102 with a locally reinforced function is provided on the inner annular wall surface of the receiving chamber, and the inner wall surface of the steel sleeve 102 is a second reference surface 116. A transmission chamber is provided on the other side of the base plate 124 away from the first open end, and the end of the transmission chamber is provided with a second open end having an annular textured surface. Preferably, the steel sleeve 102 is made of 45# steel with a hardness of HRC35, and the motor housing assembly 1 is formed by die casting of aluminum alloy.

[0027] Furthermore, such as Figure 1 As described above, the processing technology includes the following steps: S1. Mount the motor housing assembly 1 blank onto the first machining fixture 2.

[0028] S2, rough-machined wing plate 101, and second opening end.

[0029] Preferably, positioning holes 103 are machined on the wing plate 101. Several hole end faces and a rough textured surface are machined on the second opening end.

[0030] S3, rough-machine the combined end face of the steel sleeve 102 flush with the stepped hole.

[0031] More preferably, the machining allowance of the combined end face is 1mm, and it is cut in 3 layers. The machining parameters are a rotational speed of S1250r / min and a feed rate of F1000mm / min. Preferably, the combined end face is machined using a φ25 milling cutter bar with 3 carbide inserts. The φ80 combined end face is machined after the first machining fixture 2 is rotated 180°.

[0032] S4. Mount the motor housing assembly 1 onto the second machining fixture 3.

[0033] S5. Several through holes are machined on the wing plate 101, and an annular groove 125 and several annular surfaces are machined on the inner peripheral wall of the receiving cavity.

[0034] S6. Roughly machine the large-diameter inner ring wall of the steel sleeve 102 and the bent ribs on the base plate 124, and rough machine the small-diameter inner ring wall of the steel sleeve.

[0035] Preferably, the rough machining of the large-diameter inner ring wall of the steel sleeve 102 is performed using a φ32 corn milling cutter equipped with 18 carbide inserts, with machining parameters of a rotational speed S of 1500 r / min and a feed rate F of 800 mm / min. More preferably, the rough machining of the small-diameter inner ring wall of the steel sleeve 102 is performed using a carbide milling cutter, held at 0° in the second machining fixture 3, with machining parameters of a rotational speed S of 2000 r / min and a feed rate F of 500 mm / min.

[0036] S7. Mount the motor housing assembly 1 onto the third machining fixture 4.

[0037] S8. Finish machine the first reference surface 115 and the end face of the stepped hole that is away from the receiving chamber. And finish machine the outer wall surface of the motor housing layer between the wing plate 101 and the first opening end.

[0038] S9. Use a cermet end mill to finish machine the bottom end face of the steel sleeve 102, and use a rough boring tool to semi-finish machine the inner wall surface of the steel sleeve 102. Then use a cermet reamer to finish machine the inner wall surface of the steel sleeve 102. Then use a boring tool at different speeds and feed rates to finish machine the small diameter inner ring wall surface of the steel sleeve and the through hole 117 on the base plate 124.

[0039] S10. Inspect the through hole 117 and determine whether the machining accuracy of the through hole 117 meets the pre-fabrication requirements. If yes, then complete the machining. If not, determine the compensation machining parameters according to the inspection structure and compensate the machining of the through hole 117 according to the compensation machining parameters.

[0040] Further, in a preferred embodiment of this application, the rough machining of the wing plate 101 includes machining several clearance surfaces and machining positioning holes 103. Specifically, a φ32 milling cutter bar with 4 PCD inserts is used to machine 6 clearance surfaces while the first machining fixture 2 is held at 0°. Then, the first machining fixture 2 is rotated 180° around axis A to finish machine 3 clearance surfaces on the back of the motor housing assembly 1, with machining parameters of rotational speed S 8000 r / min and feed F 1200 mm / min.

[0041] Furthermore, in a preferred embodiment of this application, machining the second open end with several hole end faces and rough machining the textured surface includes the following steps: The machining of several hole end faces is carried out using a φ63 cutter head with 10 PCD cutting inserts. With the first machining fixture 2 held at 0°, the end face of one M14 thread, one φ22 cup plug hole 120, one E-70 hole end face, and the textured surface are finished. The machining parameters are: rotation speed S 9000 r / min and feed F 6000 mm / min.

[0042] Further preferably, in the preferred embodiment of this application, the positioning holes 103 on the wing plate 101 are machined using a PCD drill reamer. Two φ9 positioning holes 103 are machined in the first machining fixture 2 while it is held at 180°. The machining parameters are a rotational speed of 5000 r / min and a feed rate of 800 mm / min.

[0043] More specifically, in the preferred embodiment of this application, a plurality of first threaded holes 108 and a plurality of second threaded holes 109 need to be machined in the region of the second opening end.

[0044] Specifically, the first threaded hole 108 is machined using a carbide step drill and an M14*2 wire thread tap. The first machining fixture 2 is held at 0°. The threaded hole with a bottom depth of 48mm is machined using the M14*2 wire thread tap. The machining parameters for the step drill are a rotational speed of 5500 r / min and a feed rate of 1500 mm / min. The machining parameters for the wire thread tap are a rotational speed of 1200 r / min and a feed rate of 2400 mm / min.

[0045] The second threaded hole 109 was machined using a carbide step drill and an M6*1 forming tap. Then, the first machining fixture 2 was rotated 0° around axis A to machine 15 threaded holes with a bottom hole depth of 19mm and 1 threaded hole with a bottom hole depth of 11mm. The machining parameters for the step drill were a rotational speed of S6500r / min and a feed rate of F1500mm / min. The machining parameters for the forming tap were a rotational speed of S1200r / min and a feed rate of F1200mm / min.

[0046] Furthermore, in a preferred embodiment of this application, S2 further includes the following steps: machining a bowl-shaped plug hole 120, a bowl-shaped plug hole 120 being cleared, and a plurality of screw hole end faces on the end face of the second open end.

[0047] Specifically, the cup-shaped plug hole 120 is machined using a carbide step drill. With the first machining fixture 2 at 0°, one φ22 H9 cup-shaped plug hole 120 is rough-machined using the following parameters: rotation speed S 3500 r / min, feed rate F 1200 mm / min. The clearance below the cup-shaped plug hole 120 and the end faces of several threaded holes are machined using a carbide T-slot end mill. With the first machining fixture 2 at 0°, the clearance below the φ22 H9 cup-shaped plug hole 120, the square end face, and the end faces of three threaded holes are machined. The machining parameters for the clearance below the φ22 H9 cup-shaped plug hole 120 are: rotation speed S 3500 r / min, feed rate F 100 mm / min. The machining parameters for the square end face and the end faces of the three threaded holes are: rotation speed S 3500 r / min, feed rate F 1500 mm / min.

[0048] Furthermore, in a preferred embodiment of this application, after step S3, the method further includes: using a φ4 twist drill at the second open end, and then rotating the first machining fixture 2 around axis A to 53° to machine a φ4 oblique hole. This hole is not pre-cast and is oblique. When the tool is fed in, it needs to be fed slowly. The machining parameters are rotation speed S5000r / min and feed F100mm / min.

[0049] Furthermore, in a preferred embodiment of this application, S5 includes the following steps: Several first through holes 104 are precision machined on the wing plate 101, several second through holes 105 are rough machined, several first waist-shaped holes 118 are semi-finished and several first blind holes 121 are finished.

[0050] Specifically, using a carbide step drill, with the fixture at 0°, finish machining 8 first through holes 104 (excluding 2 positioning holes 103) and rough machining 3 φ10*11 waist-shaped holes. The machining parameters are: rotation speed S 7500 r / min and feed F 1800 mm / min.

[0051] Using a carbide step drill, with the second machining fixture 3 at 0°, rough-machine four second through holes 105. The machining parameters are: rotation speed S 7500 r / min and feed F 1800 mm / min.

[0052] Using a carbide end mill, with the second machining fixture 3 held at 0°, the three first oblong holes 118 are semi-finished. The machining parameters are: rotation speed S 3000 r / min and feed F 1000 mm / min.

[0053] Using a carbide step drill, with the second machining fixture 3 at 0°, a first blind hole 121 is finished. The machining parameters are: rotation speed S 4500 r / min and feed F 1000 mm / min.

[0054] Furthermore, step S5 also includes machining an arc-shaped clearance on the inner peripheral wall of the receiving chamber, rough machining multiple first annular surfaces 112, second annular surfaces 113 and third annular surfaces 114 with different diameters on the inner peripheral wall of the receiving chamber, and finishing machining an annular groove 125 between the first annular surfaces 112 and the second annular surfaces 113.

[0055] Specifically, a carbide reamer is used to finish the arc clearance while the second machining fixture 3 is held at 0°. The machining parameters are: rotation speed S 3000 r / min and feed F 500 mm / min.

[0056] Using a φ63 corn end mill with 14 carbide inserts, and holding it at 0° in the second machining fixture 3, perform helical machining to rough machine the first annular surface 112 of φ230, the second annular surface 113 of φ230.6, and the third annular surface 114 of φ226. The machining parameters are: rotational speed S 8000 r / min and feed F 2500 mm / min.

[0057] Using a PCD T-type milling cutter, with the second machining fixture 3 held at 0°, finish the φ230.6 annular groove 125. The machining parameters are: rotational speed S 3500 r / min and feed F 1500 mm / min.

[0058] Step S5 also includes rough machining of the first reference plane 115 and the end face of the first opening end. A φ63 cutter head is used, equipped with two PCD right-angle cutting tools and eight PCD coarse cutting tools. The second machining fixture 3 is held at 0° to rough machine the first reference plane and the end face of the first opening end. The machining parameters are: rotational speed S9000 r / min and feed rate F8000 mm / min.

[0059] Furthermore, in a preferred embodiment of this application, the following step is included after step S6: Using a carbide step drill, the second machining fixture 3 is rotated 70.9° around axis A to finish-machine a φ10 connecting hole on the inner wall of the receiving cavity. The machining parameters are a rotational speed of S4500 r / min and a feed rate of F700 mm / min. Preferably, the connecting hole is connected to the first blind hole 121.

[0060] The rough machining of the stepped hole is located on the side wall of the transmission chamber. Specifically, a rough boring tool is used with 4 carbide inserts. Then, the second machining fixture 3 is rotated 180° around axis A to finish machining one φ39 hole and rough machining one φ70 hole. The machining parameters are: rotation speed S 4500 r / min and feed F 700 mm / min.

[0061] Using a carbide step drill, with the second machining fixture 3 held at 180°, a third through hole 106 is finished. The machining parameters are: rotation speed S 6000 r / min and feed F 1000 mm / min.

[0062] Using a carbide step drill, with the second machining fixture 3 held at 180°, a fourth through hole 107 is finished. The machining parameters are: rotation speed S 6500 r / min and feed F 900 mm / min.

[0063] Furthermore, in a preferred embodiment of this application, finishing the first reference surface 115 includes the following steps: A φ50 cutter head equipped with two PCD right-angle cutting tools and six PCD precision cutting tools is used. A third machining fixture 4 rotates around axis A to 0° to finish-machine the first datum surface 115, and a φ50 polishing brush is used to remove burrs from the first datum surface. Preferably, the machining parameters for finishing the first datum surface 115 are a rotational speed of S = 9000 r / min and a feed rate of F = 8000 mm / min. More preferably, the machining parameters for removing burrs from the first datum surface using the polishing brush are a rotational speed of S = 1000 r / min and a feed rate of F = 8000 mm / min. Further preferably, in the preferred embodiment of this application, the end face of the stepped hole away from the receiving chamber is machined using a φ50 cutter head equipped with 2 PCD right-angle cutting tools and 6 PCD precision cutting tools. The third machining fixture 4 is rotated 180° around axis A, and the machining parameters are a rotational speed S of 9000 r / min and a feed rate F of 8000 mm / min.

[0064] More specifically, in the preferred embodiment of this application, the outer wall surface of the motor housing layer between the precision-machined wing plate 101 and the first opening end is machined using a precision boring tool with two PCD cutting inserts. Then, the third machining fixture 4 is rotated to 0° around axis A to finish-machine the outer wall surface of the motor housing layer between the precision-machined wing plate 101 and the first opening end with a diameter of φ238. The machining parameters are a rotational speed of S2000r / min and a feed rate of F200mm / min.

[0065] Furthermore, in a preferred embodiment of this application, S8 further includes the following steps: opening relief grooves on both sides of the third annular surface 114, and finishing the first annular surface 112, the second annular surface 113 and the third annular surface 114.

[0066] Further preferably, in the preferred embodiment of this application, the finishing of the first annular surface 112, the second annular surface 113, and the third annular surface 114 includes the following steps: (The steps are not described in the provided text.) Using a PCD slot end mill, with the third machining fixture 4 held at 0°, finish the bottom surfaces of the holes φ230 first annular surface 112 and φ226 third annular surface 114, as well as the relief groove. The machining parameters are: rotation speed S 8000 r / min and feed F 3000 mm / min.

[0067] Using a rough boring tool with 6 PCD inserts, and holding it at 0° in the third machining fixture 4, perform semi-finish machining on the chamfer of the opening of the φ226 third annular surface 114, the φ230 first annular surface 112, and the φ230 first annular surface 112. Leave a machining allowance of 0.2mm on each side for finishing. The machining parameters are: rotation speed S 3000r / min, feed F 800mm / min.

[0068] Using a precision boring tool with four PCD inserts, and holding it at 0° in the third machining fixture 4, finish machine a φ230 first annular surface 112 and a φ226 third annular surface 114, with a machining allowance of 0.2mm. Machining is performed in the same sequence and at the same angle. The machining parameters are a rotational speed of 3000 r / min and a feed rate of 800 mm / min. This ensures that the first annular surface 112 and the second annular surface 113 meet the high precision requirements of a positional accuracy of 0.05mm and a perpendicularity of 0.06mm.

[0069] Furthermore, in a preferred embodiment of this application, the finishing of the bottom end face of the steel sleeve 102 using a cermet milling cutter specifically includes the following steps: Using a cermet end mill, with the third machining fixture 4 at 0°, finish the bottom end face of the steel sleeve 102. The machining parameters are: rotation speed S 8000 r / min and feed F 400 mm / min.

[0070] Furthermore, in a preferred embodiment of this application, the semi-finishing of the inner wall surface of the steel sleeve 102 using a rough boring tool specifically includes the following steps: Using a rough boring tool with 4 carbide inserts, and holding it at 0° in the third machining fixture 4, semi-finish the inner wall of a φ80 steel sleeve 102, leaving a machining allowance of 0.08mm on each side for finishing. The machining parameters are: rotation speed S 700r / min, feed F 300mm / min.

[0071] Furthermore, in a preferred embodiment of this application, the finishing of the inner wall surface of the steel sleeve 102 using a cermet reamer specifically includes the following steps: Using a cermet reamer, with the third machining fixture 4 at 0°, finish the inner wall and chamfer of the φ80 steel sleeve 102. The machining allowance is 0.08mm, and the tool life is around 2000 pieces. This ensures the hole diameter is φ80 (0 / +0.019)mm and the cylindricity is 0.012mm. The machining parameters are: spindle speed S 550r / min and feed rate F 400mm / min (the 80mm hole here does not require finishing of the bottom surface).

[0072] Furthermore, in a preferred embodiment of this application, the finishing of the small-diameter inner ring wall of the steel sleeve and the through hole 117 on the base plate 124 using a boring bar at different speeds and feed rates specifically includes the following steps: Using a boring bar with two PCD inserts, and holding it at 0° in the third machining fixture 4, finish machine the inner wall of the small diameter of the φ69 steel sleeve and the through hole 117 on the φ39 base plate 124. When machining the through hole 117 on the φ39 base plate 124, the machining parameters are: rotation speed S 2000 r / min, feed F 400 mm / min. When machining the inner wall of the small diameter of the φ69 steel sleeve, the material for the φ69 hole is 45# steel, and the machining parameters are: rotation speed S 600 r / min, feed F 100 mm / min.

[0073] Furthermore, in a preferred embodiment of this application, a plurality of second through holes 105 and a plurality of first oblong holes 118 are precision machined on the wing plate 101, which specifically includes the following steps: Using a PCD reamer, with the third machining fixture 4 at 0°, finish machine the four second through holes 105, ensuring a hole diameter of φ8 (+0.015 / +0.03) mm and a position accuracy of 0.05. The machining parameters are: rotation speed S 8000 r / min and feed F 1600 mm / min.

[0074] Using a PCD end mill, with the third machining fixture 4 held at 0°, finish machine three φ10*11 first waist-shaped holes 118, ensuring the hole diameter is φ10 (0 / +0.016) mm * 11 (-0.092 / +0.108) mm and the positional accuracy is 0.05. This hole is machined in one cut. The tool diameter is φ10.008 (0 / +0.003) mm, and the machining parameters are: spindle speed S 3500 r / min and feed F 400 mm / min.

[0075] Furthermore, in a preferred embodiment of this application, step S10 is followed by: The precision-machined stepped hole is located on the side wall of the transmission chamber.

[0076] Finish the textured surface on the second opening end.

[0077] Several pin posts 122 and cup plug holes 120 are machined at the end of the transmission chamber, and several inclined drill holes are machined between the small diameter inner ring wall of the steel sleeve 102 and the base plate 124.

[0078] Furthermore, the stepped hole is finished on the side wall of the transmission chamber. It is machined using a precision boring tool with two PCD cutting inserts. The tool is held at 180° in the third machining fixture 4. The φ62 stepped hole is finished on the side wall of the transmission chamber and the chamfer. The machining parameters are: rotation speed S 3000 r / min and feed F 200 mm / min.

[0079] Further, the textured surface on the second opening end is finished using a φ63 cutter head equipped with 2 PCD pointed cutting tools and 8 PCD precision cutting tools. The pointed cutting tools need to be adjusted on the cutter head to be 0.008mm higher than the precision cutting tools to achieve the required texture. The surface is held at 180° in the third machining fixture 4 for finishing. The machining parameters are: rotational speed S 6000 r / min, feed F 4500 mm / min.

[0080] Furthermore, several pin posts 122 and cup-shaped plug holes 120 are machined at the end of the transmission chamber, and several inclined drill holes are machined between the small-diameter inner ring wall of the steel sleeve 102 and the base plate 124, which includes the following steps: Using the PCD tool holder, and holding the third machining fixture 4 at a 180° angle, machine two φ6 pin posts 122. The machining parameters are: rotation speed S 8000 r / min and feed F 500 mm / min.

[0081] Using a PCD end mill, with the third machining fixture 4 held at 180°, clear the corners near the two φ6 pin posts 122. The machining parameters are: rotation speed S 9000 r / min and feed F 2500 mm / min.

[0082] Using a PCD reamer, and holding it at 180° in the third machining fixture 4, machine a φ22 cup plug hole 120. The machining parameters are: rotation speed S 3500 r / min and feed F 600 mm / min.

[0083] Using a φ4 twist drill with a coating to improve tool life, the third machining fixture 4 is rotated 44° around the B-axis to machine several inclined holes between the small-diameter inner ring wall of the steel sleeve 102 and the base plate 124. Part of the hole opening is made of 45# steel, and the tool is relatively long. First, a 5mm deep centering hole is created using the following parameters: rotation speed S 2500 r / min, feed F 100 mm / min. Then, another twist drill is used to drill through the hole using the following parameters: rotation speed S 2000 r / min, feed F 200 mm / min.

[0084] More preferably, the processing technology further includes the following steps: S11. Mount the motor housing assembly 1 onto the fourth machining fixture 5.

[0085] S12, Rotary motor housing assembly 1, with several end faces machined on the outer wall surface of the motor housing assembly 1, and the stamped steel surface 123 precision machined.

[0086] Specifically, a φ20 tool holder is used, equipped with two PCD precision cutting inserts. Then, the fourth machining fixture 5 is rotated around the B axis by 0°, 53°, and -127° respectively to finish the five end faces on the side. The machining parameters are a rotational speed of 8000 r / min and a feed rate of 1500 mm / min.

[0087] Using a φ32 tool holder with 4 PCD precision cutting inserts, and holding it at -90° in the fourth machining fixture 5, finish the steel stamp surface 123. The machining parameters are: rotation speed S 7000 r / min and feed F 2000 mm / min.

[0088] Using a φ63 polishing brush, and holding the fourth machining fixture 5 at 0°, finish the steel stamp surface 123. The machining parameters are: rotation speed S 1000 r / min and feed F 4000 mm / min.

[0089] S13. Several third threaded holes 110 are precision machined on the outer wall surface of the wing plate 101.

[0090] Specifically, using a carbide step drill and an M6*1 forming tap, and holding the machine in the fourth machining fixture 5 at a -90° angle, a third threaded hole 110 with a bottom hole depth of 19mm is machined. The machining parameters for the step drill are a rotational speed of S 6500 r / min and a feed rate of F 1500 mm / min. The machining parameters for the forming tap are a rotational speed of S 1200 r / min and a feed rate of F 1200 mm / min. Using a forming tap can increase the strength of the threaded hole and reduce aluminum chips in the threaded hole, thereby improving the cleanliness requirements of the product.

[0091] S14. Finish machine the second oblong hole 119 on the side wall of the transmission chamber, and finish machine the through hole and threaded hole on the outer end face of the second oblong hole 119. Then, machine the bevel at the first threaded hole 108 at the second opening end.

[0092] Specifically, using a carbide step drill and an M4*0.7 forming tap, and holding the fourth machining fixture 5 at 0°, a fourth threaded hole 111 with a bottom hole depth of 14mm is machined. The machining parameters for the step drill are a rotational speed of S6500r / min and a feed rate of F800mm / min. The machining parameters for the forming tap are a rotational speed of S1200r / min and a feed rate of F840mm / min. Using a forming tap can increase the strength of the threaded hole and reduce aluminum chips in the threaded hole, thereby improving the cleanliness requirements of the product.

[0093] Using a carbide step drill, with the fourth machining fixture 5 at 0°, machine a φ3 through hole. The machining parameters are: rotation speed S 6500 r / min and feed F 800 mm / min.

[0094] Using a carbide end mill, with the fourth machining fixture 5 at 0°, rough machine a φ28.5 second oblong hole 119. Machining parameters: speed S 6000 r / min, feed F 800 mm / min.

[0095] Using a PCD end mill, with the fourth machining fixture 5 at 0°, finish machine a φ28.5 second oblong hole 119. Machining parameters: speed S 6000 r / min, feed F 1000 mm / min.

[0096] Using a carbide end mill, the fourth machining fixture 5B axis is rotated to -80.25° to finish the 15° bevel next to the end face of the M14 threaded hole. The machining parameters are: speed S 4000 r / min and feed F 500 mm / min.

[0097] Furthermore, in a preferred embodiment of this application, a processing apparatus suitable for a new energy motor housing assembly 1 is also disclosed. This apparatus uses the aforementioned processing technology suitable for a new energy motor housing assembly 1 to process the motor housing assembly 1. The processing apparatus includes: The first machining fixture 2 includes a first mounting plate 201, a plurality of first locating pins 202, a plurality of first supports 203, and a plurality of first clamping components. The first mounting plate 201 is rotatable about axis A and has a first machining hole 204 penetrating the plate. Each first locating pin 202, each first support 203, and each first clamping component are arranged circumferentially on the first mounting plate 201 outside the first machining hole 204 to lock the motor housing assembly 1.

[0098] The second machining fixture 3 includes a second mounting plate 301, a plurality of second locating pins 302, a plurality of second supports 303, and a plurality of second clamping members. The second mounting plate 301 is rotatable about axis A and has a second machining hole 304 penetrating the plate. Each second locating pin 302, each second support 303, and each second clamping member are arranged circumferentially on the second mounting plate 301 outside the second machining hole 304 to lock the motor housing assembly 1.

[0099] The third machining fixture 4 includes a third mounting plate 401, a plurality of third locating pins 402, a plurality of third supports 403, and a plurality of third clamping components. The third mounting plate 401 is perpendicular to the horizontal plane and can rotate about axis B. The third mounting plate 401 has a third machining hole 404 penetrating the plate. Each third locating pin 402, each third support 403, and each third clamping component are arranged circumferentially on the third mounting plate 401 outside the third machining hole 404, for locking the motor housing assembly 1.

[0100] Furthermore, in a preferred embodiment of this application, the processing apparatus further includes a fourth processing fixture 5, which includes a fourth mounting plate 501, a plurality of fourth positioning pins 502, and a plurality of fourth clamping members. The fourth mounting plate 501 is rotatable about the B-axis. Each fourth positioning pin 502 and each fourth clamping member is arranged circumferentially on the fourth mounting plate 501 in the outer peripheral region of the fourth processing hole, for locking the motor housing assembly 1.

[0101] Further preferably, in the preferred embodiment of this application, the first mounting plate 201 is provided with two support plates perpendicular to the top surface at both ends. At the same time, the two support plates are fixedly connected to the rotating shaft of the rotating mechanism on both sides, and the rotating shaft extends along the A-axis direction, so that the first mounting plate 201 can rotate around the A-axis direction, thereby enabling the cutting mechanism to perform processing on both sides of the first opening end and the second opening end of the motor housing assembly 1.

[0102] More specifically, in a preferred embodiment of this application, a plurality of peripheral machining holes 205 corresponding to the positions of the wing plate 101 are also provided on the first mounting plate 201. Preferably, each peripheral machining hole 205 corresponds to the position of the positioning hole 103 and the clearance surface, that is, the projections of the positioning hole 103 and the clearance surface in the C-axis direction fall within the range of the peripheral machining holes 205, thereby ensuring that after the first mounting plate 201 is rotated 180°, the cutting mechanism can easily achieve accurate machining of the back area of ​​the wing plate 101 of the motor housing assembly 1 through the peripheral machining holes 205.

[0103] Furthermore, in the preferred embodiment of this application, the first positioning pin 202, the second positioning pin 302, the third positioning pin 402, and the fourth positioning pin 502 all have the same structure. Accordingly, they all include positioning diamond pins and positioning round pins, which are used to support the positioning holes 103 provided on the wing plate 101.

[0104] Further preferably, in the preferred embodiment of this application, the first support 203, the second support 303, the third support 403, and the fourth support have the same structure. Each support can adaptively adjust the movement of its end according to the position of the wing plate 101, and after the end of the support contacts the wing plate 101, it provides stable support to the wing plate 101. Preferably, the first support 203, the second support 303, the third support 403, and the fourth support are all hydraulic supports.

[0105] More specifically, in the preferred embodiment of this application, the first, second, third, and fourth clamping components have the same structure, each including a lever-type clamping assembly and / or a corner-type clamping assembly. The lever-type clamping assembly includes a support base 8 and a lever-type hydraulic cylinder 6. The lever-type hydraulic cylinder 6 includes a cylinder extension rod and a hydraulic pressure rod. The cylinder extension rod lifts one end of the hydraulic pressure rod, allowing the other end of the hydraulic pressure rod to clamp the wing plate 101 onto the support base 8. The corner-type clamping assembly includes a support base 8 and a corner cylinder 7. A pressure block is provided on the rotating shaft of the corner cylinder 7. The rotating shaft can drive the pressure block to be positioned on top of the support base 8 or disengaged from the top of the support base 8, thereby allowing the pressure block to clamp the wing plate 101 onto the support base 8.

[0106] Furthermore, in a preferred embodiment of this application, the first processing fixture 2, the second processing fixture 3, the third processing fixture 4 and the fourth processing fixture 5 each further include a plurality of limiting support rods 9, which are disposed on the mounting plate, and the ends of the limiting support rods 9 away from the mounting plate can abut against the outer peripheral wall surface of the wing plate 101.

[0107] More preferably, in the preferred embodiment of this application, a sequence valve is provided on the first mounting plate 201, the second mounting plate 301, the third mounting plate 401 and the fourth mounting plate 501 to control the movement of the support and the clamping component.

[0108] More specifically, in the preferred embodiment of this application, pads are provided on both the second mounting plate 301 and the third mounting plate 401. The second support 303, the third support 403, the second clamping member, and the third clamping member are all disposed on the pads to ensure stable clamping support of the motor housing assembly 1 when the wing plate 101 is far from the mounting plate. Furthermore, two inclined hydraulic supports are provided in the third machining hole 404 and the second machining hole 304 to support the area of ​​the second opening end of the motor housing assembly 1 when the wing plate 101 is far from the mounting plate.

[0109] Furthermore, in a preferred embodiment of this application, the third processing fixture 4 further includes a rotating base, the rotating shaft of which is fixedly connected to the bottom end face of the third mounting plate 401, for driving the third mounting plate 401 to rotate around the B-axis.

[0110] The processing technology and apparatus for new energy motor housing assemblies in this invention offer high processing precision and excellent finished product quality. By employing corresponding roughing and finishing processes for different areas of the steel sleeve 102 and its associated areas on the motor housing assembly 1, and by selectively choosing roughing and finishing tools and parameters based on the processing requirements of the steel sleeve 102 and its associated areas, high-precision processing of the steel sleeve 102 and its associated areas on the motor housing assembly 1 is achieved. This ensures processing efficiency of the motor housing assembly 1 while significantly improving the finished product quality. Furthermore, the online measuring tool corresponding to the through hole 117 on the base plate 124 ensures the processing accuracy of the through hole 117, further enhancing the finished product quality. This invention has good prospects for promotion and application value.

[0111] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A processing technology applicable to new energy motor housing assemblies, used for processing motor housing assemblies with locally reinforced areas, characterized in that, The processing technology includes the following steps: S1. Mount the motor housing assembly blank onto the first machining fixture; The motor housing assembly has an axially extending receiving chamber inside. One end of the receiving chamber is a first open end. A wing plate is provided around the first open end. The wing plate has a first reference surface facing the first open end. The other end of the receiving chamber is provided with a bottom plate with a locally reinforced area. Both sides of the base plate are provided with connected stepped holes, and the stepped holes are provided with steel sleeves with local reinforcement function on the inner ring wall of the receiving chamber; a transmission chamber is provided on the other side of the base plate away from the first opening end, and a second opening end is provided at the end of the transmission chamber. S2, rough-machined wing plate and second opening end; Positioning holes are machined on the wing plate; several hole end faces and a rough textured surface are machined on the second opening end; S3, rough-machined steel sleeve and stepped hole flush combined end face; The machining allowance of the combined end face is 1mm, and it is cut in 3 layers. The machining parameters are: rotation speed S1250r / min and feed F1000mm / min. S4. Mount the motor housing assembly onto the second machining fixture; S5. Machining several through holes on the wing plate, and machining an annular groove and several annular surfaces on the inner peripheral wall of the receiving cavity; S6. Roughly machine the large-diameter inner ring wall of the steel sleeve and the bent ribs on the base plate, and rough machine the small-diameter inner ring wall of the steel sleeve. The roughing of the inner ring wall of the large diameter of the steel sleeve is carried out using a φ32 corn milling cutter with 18 carbide inserts. The machining parameters are: rotation speed S1500r / min and feed F800mm / min. S7. Mount the motor housing assembly onto the third machining fixture; S8. Finish machine the end face of the first reference surface and the stepped hole that is away from the receiving chamber; and finish machine the outer wall surface of the motor housing layer between the wing plate and the first opening end; S9. Use a cermet end mill to finish the bottom end face of the steel sleeve, and use a rough boring tool to semi-finish the inner wall surface of the steel sleeve. Then use a cermet reamer to finish the inner wall surface of the steel sleeve. Finally, use a boring tool at different speeds and feed rates to finish the small diameter inner ring wall surface of the steel sleeve and the through hole on the base plate. S10. Detect the through hole and determine whether the machining accuracy of the through hole meets the pre-fabrication requirements; if yes, then complete the machining; if no, then determine the compensation machining parameters according to the detection structure, and compensate the machining of the through hole according to the compensation machining parameters.

2. The processing technology applicable to new energy motor housing assemblies according to claim 1, wherein, The S2 further includes the following steps: machining a bowl-shaped plug hole, a bowl-shaped plug hole clearance, and several screw hole end faces on the end face of the second open end.

3. The processing technology applicable to new energy motor housing assemblies according to claim 1, wherein, S5 includes the following steps: Several first through holes are precision machined on the flange, several second through holes are rough machined, several first waist-shaped holes are semi-finished, and first blind holes are precision machined. A circular arc is machined on the inner peripheral wall of the receiving chamber to create a clearance. Multiple first annular surfaces, second annular surfaces, and third annular surfaces of different diameters are rough machined on the inner peripheral wall of the receiving chamber, and an annular groove between the first annular surfaces and the second annular surfaces is finish machined.

4. The processing technology applicable to new energy motor housing assemblies according to claim 3, wherein, S5 further includes the following steps: A connecting hole is machined on the inner wall of the receiving cavity to connect with the first blind hole; The stepped hole is rough-machined on the side wall of the transmission chamber, and the third and fourth through holes are finished on the base plate.

5. The processing technology applicable to new energy motor housing assemblies according to any one of claims 1 to 4, wherein, The finishing of the first reference surface includes the following steps: A φ50 cutter head is equipped with two PCD right-angle cutting tools and six PCD precision cutting tools to finish the first reference surface, and a φ50 polishing brush is used to remove burrs on the first reference surface.

6. The processing technology applicable to new energy motor housing assemblies according to claim 5, wherein, S8 further includes the following steps: Relief grooves are made on both sides of the third annular surface to finish the first, second, and third annular surfaces.

7. The processing technology applicable to new energy motor housing assemblies according to any one of claims 1 to 4, wherein, Several second through holes and several first waist-shaped holes are precision machined on the wing plate.

8. The processing technology applicable to new energy motor housing assemblies according to any one of claims 1 to 4, wherein, The processing technology also includes the following steps: S11. Mount the motor housing assembly onto the fourth machining fixture; S12, Rotary motor housing assembly, with several end faces machined on the outer wall surface of the motor housing assembly, and the stamped steel surface precision machined; S13. Finish machining several third threaded holes on the outer wall surface of the wing plate; S14. Finish machine the second oblong hole on the side wall of the transmission chamber, and finish machine the through hole and threaded hole on the outer end face of the second oblong hole; then machine the bevel at the first threaded hole at the second opening end.

9. The processing technology applicable to new energy motor housing assemblies according to any one of claims 1 to 4, wherein, In S9, the small-diameter inner ring wall of the steel sleeve is precision machined using a boring tool equipped with two PCD cutting inserts. The machining parameters are a rotational speed of S2000 r / min and a feed rate of F400 mm / min.

10. A processing device suitable for new energy motor housing assemblies, characterized in that, The processing method for processing motor housing assemblies according to any one of claims 1 to 9 is used to process the motor housing assembly, wherein the processing apparatus comprises: The first machining fixture includes a first mounting plate, a plurality of first locating pins, a plurality of first supports, and a plurality of first clamping components; wherein, the first mounting plate is rotatable about the A-axis and is provided with a first machining hole penetrating the plate body; each of the first locating pins, each of the first supports, and each of the first clamping components are arranged circumferentially on the first mounting plate in the outer peripheral area of ​​the first machining hole for locking the motor housing assembly; and the first mounting plate is also provided with a plurality of peripheral machining holes for machining the areas on both sides of the wing plate; The second machining fixture includes a second mounting plate, a plurality of second locating pins, a plurality of second supports, and a plurality of second clamping members. The second mounting plate is rotatable about axis A and has a second machining hole penetrating the plate. Each second locating pin, each second support, and each second clamping member is circumferentially arranged on the second mounting plate outside the second machining hole area to lock the motor housing assembly. A pad is provided between each second clamping member and the second mounting plate to adjust the height of the second clamping member. The third machining fixture includes a third mounting plate, a plurality of third positioning pins, a plurality of third supports, and a plurality of third clamping components; wherein, the third mounting plate is perpendicular to the horizontal plane and can rotate about the B-axis, and the third mounting plate is provided with a third machining hole penetrating the plate body; each of the third positioning pins, each of the third supports, and each of the third clamping components are arranged circumferentially on the third mounting plate in the outer peripheral area of ​​the third machining hole, for locking the motor housing assembly.

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