Stator core positioning hole processing tool and machine tool

Abstract

The utility model discloses a kind of stator core positioning hole processing frock and machine tool, belong to motor machining equipment technical field;It includes: stator core, the circumferential surface of stator core is equipped with welding rib groove and keyway;Further include: positioning base and positioning die frame, positioning base includes two oppositely arranged abutting blocks, two abutting blocks are respectively inserted in two welding rib grooves of stator core, to adjust the positioning hole site of stator core to be processed to be set up upward;Positioning die frame includes positioning disc, positioning disc includes disc body, positioning key and positioning plate, disc body and one end of stator core abut, positioning key and positioning plate are perpendicular to disc body and connect with the edge of disc body, positioning key and positioning plate are spaced 2π / Nrad relative to the central axis of disc body, positioning key is inserted in keyway, and marking hole for marking the positioning hole site of stator core to be processed is equipped on positioning plate.The utility model can use the keyway of stator core as reference, and position the hole site to be processed of stator core.

Description

Technical Field

[0001] This utility model relates to the field of motor processing equipment technology, and in particular to a stator core positioning hole processing fixture and machine tool. Background Technology

[0002] In the manufacturing process of special motors, the machining of positioning holes in the stator core is a crucial step in ensuring the assembly accuracy of the motor. The positioning holes need to maintain a precise relative angular relationship with the keyway; common included angles include 90°, 120°, or 180°. This precise positional relationship directly affects the assembly quality of the stator core and the housing, thus impacting the motor's operating performance.

[0003] Currently, the machining technology for stator core keyways is relatively mature, but the machining of locating holes still faces many technical challenges. Due to the cylindrical structure of the stator core, accurate positioning is difficult when machining lateral locating holes, resulting in significant positional deviations. Traditional machining methods typically employ manual scribing for positioning, which is not only inefficient but also fails to guarantee the required angular accuracy between the locating hole and the keyway. Utility Model Content

[0004] In view of this, it is necessary to provide a stator core positioning hole machining fixture and machine tool to solve the problem that the positioning holes on the existing stator core are difficult to position.

[0005] In a first aspect, this utility model provides a stator core positioning hole machining fixture, including a stator core, wherein a weld bead groove and a keyway are provided on the circumferential surface of the stator core; and further comprising: The positioning base includes two opposing abutment blocks, which are respectively inserted into the two weld grooves of the stator core to adjust the positioning hole of the stator core to be processed to face upward. A positioning mold frame includes a positioning disk, which includes a disk body, a positioning key, and a positioning plate. The disk body abuts against one end of the stator core. The positioning key and the positioning plate are arranged perpendicular to the disk body and connected to the edge of the disk body. The positioning key and the positioning plate are spaced 2π / Nrad apart from the central axis of the disk body. The positioning key is inserted into the keyway. The positioning plate is provided with marking holes for marking the positioning holes to be processed in the stator core.

[0006] Furthermore, the positioning disk also includes N claws, which are integrally connected to the disk body. The N claws are equidistantly arranged around the central axis of the positioning disk, and the claws can engage the edge of the stator core.

[0007] Furthermore, the positioning key and the positioning plate are detachably connected to the two adjacent claws.

[0008] Furthermore, the positioning mold frame also includes an abutment plate and a tensioning member. One end of the tensioning member is fixedly connected to the disc body, and the other end of the tensioning member is threadedly connected to the abutment plate via the stator core. The disc body and the abutment plate abut against both ends of the stator core, respectively.

[0009] Furthermore, the positioning base also includes a base body, and the bottoms of the two abutting blocks are detachably connected to the base body, and the inner side of the abutting block is provided with an abutting part that is adapted to the weld groove.

[0010] Furthermore, the base body is provided with connection holes.

[0011] Secondly, this utility model provides a machine tool for processing stator core positioning holes, including the aforementioned stator core positioning hole processing fixture and a drilling machine. The drilling machine includes a bed and a drilling rig, the base body is detachably connected to the bed, and the drilling rig is positioned relative to the marking hole.

[0012] Furthermore, a moving unit is provided between the bed and the base body. The moving unit can drive the base body to move relative to the X-axis and Y-axis directions to adjust the alignment of the drilling rig with the marking hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The present invention provides a stator core positioning hole machining fixture and machine tool, which is equipped with a positioning base. The positioning base includes two opposing abutment blocks, which are respectively inserted into the two weld bead grooves of the stator core, so that the axis of the stator core is horizontally positioned and effectively supports the stator core. At the same time, by comparing the keyway position, the positioning hole to be machined on the stator core can be set upward, which facilitates subsequent drilling.

[0014] (2) A stator core positioning hole machining fixture and machine tool of the present invention are provided with a positioning mold frame, which includes a positioning disk, a positioning key and a positioning plate. The positioning disk abuts against one end of the stator core and is relatively flush with the end of the stator core, serving as the initial axial reference of the stator core. The positioning key and the positioning plate are set perpendicular to the disk and connected to the edge of the disk. The positioning key and the positioning plate are set at a distance of 2π / N rad from the central axis of the disk, where N is 1, 2, 3 or 4, so that the included angle between the positioning key and the positioning plate is 2π rad, π rad, 2π / 3 or π / 2 rad. By machining the keyway precisely, the positioning plate is positioned exactly above the stator core. The positioning plate is provided with a marking hole, the distance between the marking hole and the initial reference is a set distance, realizing the axial positioning of the marking hole. The marking hole can mark the positioning hole position to be machined on the stator core, providing precise positioning for the machining positioning of the drilling machine. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the positioning base, the positioning mold frame, and the stator core in this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the connection structure between the positioning base, the positioning mold frame, and the stator core in this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the connection structure between the positioning base, the positioning mold frame, and the stator core in this utility model. Figure 3 ; Figure 5 This is a schematic diagram of the connection structure between the positioning base, the positioning mold frame, and the stator core in this utility model. Figure 4 ; Figure 6 This is a schematic diagram of the positioning mold frame in this utility model; Figure 7 This is a schematic diagram of the stator core structure in this utility model.

[0016] In the diagram, 100 is the stator core; 110 is the weld bead groove; 120 is the keyway; and 130 is the positioning hole to be machined. 200. Positioning base; 210. Abutment block; 211. Abutment part; 220. Base body; 221. Connecting hole; 300. Positioning mold frame; 310. Positioning disc; 311. Disc body; 312. Positioning key; 313. Positioning plate; 313a. Marking hole; 314. Claw; 320. Abutment plate; 330. Tensioner; 400. Drilling machine; 410. Machine bed; 420. Drilling rig; 430. Moving unit. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0018] This embodiment describes a stator core positioning hole machining fixture and machine tool, which relates to the field of motor processing equipment technology. It is equipped with a positioning base 200 and a positioning mold 300. The positioning base 200 and the positioning mold 300 can use the keyway 120 of the stator core 100 as a reference to position the hole to be machined in the stator core 100.

[0019] Please see Figures 1 to 7 This embodiment of a stator core positioning hole machining fixture includes a stator core 100. The stator core 100 has a weld bead groove 110 and a keyway 120 on its circumferential surface. The keyway 120 and the positioning hole have a relative angle (90°, 120°, or 180°). The stator core positioning hole machining fixture also includes a positioning base 200 and a positioning mold 300. The positioning base 200 can support and circumferentially position the stator, and the positioning mold 300 can circumferentially position the stator and mark the positioning hole positions 130 to be machined.

[0020] The positioning base 200 includes two opposing abutment blocks 210, which are respectively inserted into the two weld bead grooves 110 of the stator core 100, so that the axis of the stator core 100 is horizontally positioned and provides effective support for the stator core 100. At the same time, by comparing the position of the keyway 120, the positioning hole 130 to be processed in the stator core 100 can be set upward, which facilitates subsequent drilling.

[0021] The positioning mold frame 300 includes a positioning disk 310, which includes a disk body 311, a positioning key 312, and a positioning plate 313. The disk body 311 abuts against one end of the stator core 100, and the ends of the disk body 311 and the stator core 100 are relatively flush, serving as the initial axial reference for the stator core 100. The positioning key 312 and the positioning plate 313 are set perpendicular to the disk body 311 and connected to the edge of the disk body 311. The positioning key 312 and the positioning plate 313 are set at a distance of 2π / N rad from the central axis of the disk body 311, where N is 1, 2, 3, or 4, so that the included angle between the positioning key 312 and the positioning plate 313 is 2π rad, π rad, 2π / 3, or π / 2 rad. By precisely machining the keyway 120, the positioning plate 313 is positioned directly above the stator core 100. The positioning plate 313 is provided with a marking hole 313a. The distance between the marking hole 313a and the initial reference is a set distance, thereby achieving axial positioning of the marking hole 313a. The marking hole 313a can mark the positioning hole 130 to be machined on the stator core 100, thus providing precise positioning for the machining positioning of the drilling rig 420.

[0022] During operation, the stator core 100 is placed on the positioning base 200, and the two abutment blocks 210 are inserted into the symmetrically distributed weld bead grooves 110 to eliminate radial offset errors. The positioning mold frame 300 is installed on the end face of the stator core 100. After the positioning key 312 is inserted into the keyway 120, the positioning plate 313 automatically reaches the predetermined angle position. The central axis of the marking hole 313a coincides with the design axis of the positioning hole, and the drill bit passes through this hole to complete the machining of the positioning hole.

[0023] In some embodiments, please refer to Figures 2 to 5The positioning disk 310 also includes N jaws 314, which are integrally connected to the disk body 311 to ensure the connection strength between the jaws 314 and the chuck. The N jaws 314 are equidistantly arranged around the central axis of the positioning disk 310. The relative engagement of the jaws 314 with the stator core 100 provides a stable clamping effect on the stator core 100, eliminating the positional deviation of the positioning holes caused by uneven clamping force. At the same time, the adaptive cooperation between the jaws 314 and the core tooth grooves significantly improves the positional accuracy of the positioning hole machining and the batch processing efficiency.

[0024] In practical implementation, the jaws 314 are clamping structures extending circumferentially along the chuck body 311. They can be integrally cast with the chuck or bent into shape. The ends of the jaws 314 form clamping surfaces that match the edge curvature of the stator core 100. The jaws 314 are evenly distributed at an angle along the central axis of the positioning disk 310, specifically arranged in a circumferentially even manner. For example, when N is 4, adjacent jaws 314 are spaced 90 degrees apart.

[0025] When the positioning disk 310 abuts against the end face of the stator core 100, the clamping force formed by the multiple jaws 314 through equal-distance distribution acts uniformly on the outer edge of the stator core 100. When the number N of jaws 314 is set to be an integer multiple of the number of slots in the stator core 100, for example, N is 1 / 3 or 1 / 4 of the number of slots in the stator core 100, the jaws 314 can accurately engage with the gaps between the teeth of the core to achieve circumferential positioning. Through the integrated connection between the jaws 314 and the disk body 311, the assembly gap of traditional split fixtures can be eliminated, ensuring that the stator core 100 does not undergo axial displacement during processing.

[0026] In some embodiments, please refer to Figure 2 The positioning key 312 and the positioning plate 313 are detachably connected to the two adjacent claws 314 respectively. The detachable connection enables quick assembly and disassembly of the positioning key 312, the positioning plate 313 and the claws 314, which not only maintains the versatility of the main structure of the mold frame, but also flexibly adapts to various keyway 120 distribution parameters.

[0027] In practical implementation, the positioning key 312 and positioning plate 313 are fixed to the jaws 314 through a separable mechanical structure. This can be achieved using bolt or pin connections. For example, threaded holes can be provided on the side of the jaws 314, and through holes can be provided on the bottom of the positioning key 312. Bolts are then screwed through the through holes and into the threaded holes for fixation. This structure allows the positions of the positioning key 312 and positioning plate 313 on the jaws 314 to be independently adjusted to accommodate the distribution requirements of keyways 120 in stator cores 100 of different sizes.

[0028] When it is necessary to adjust the mating position of the positioning key 312 and the keyway 120, the bolts can be loosened to allow the positioning key 312 to move along the length of the jaw 314. After the positioning key 312 is inserted into the keyway 120, the bolts are tightened again. The positioning plate 313 is connected to another jaw 314 in the same way. The position of its marking hole 313a is automatically adjusted according to the spacing of the jaws 314 to ensure that the marking hole 313a always maintains a preset angle relationship with the keyway 120. When the positioning plate 313 and the positioning key 312 are worn or damaged, only the positioning key 312 and the positioning plate 313 of the corresponding size need to be replaced, without replacing the entire positioning mold frame 300.

[0029] In some embodiments, please refer to Figure 6 The positioning mold frame 300 also includes an abutment plate 320 and a tensioning member 330. One end of the tensioning member 330 is fixedly connected to the disc body 311, and the other end of the tensioning member 330 passes through the stator core 100 and is threadedly connected to the abutment plate 320. The disc body 311 and the abutment plate 320 abut against the two ends of the stator core 100 respectively, so that the disc body 311 can always be tightly fitted with the end of the stator core 100, ensuring that the axial initial reference of the stator core 100 is tangent to the disc body 311.

[0030] In the specific implementation process, the abutment plate 320 is a plate-shaped structure that contacts the end face of the stator core 100. It can be a metal plate with threaded holes, which is used to provide reverse support force and cooperate with the tensioning member 330 to form a clamping effect.

[0031] The tensioning member 330 is a fastening component used to connect the disc body 311 and the abutment plate 320. Specifically, it can be implemented by bolts or screws. The clamping force is adjusted by the threaded connection so that the disc body 311 and the abutment plate 320 apply axial pressure to both ends of the stator core 100.

[0032] A nut is welded onto the abutment plate 320, and the end of the tensioning member 330 is screwed into the nut to facilitate adjustment of the clamping force and ensure the fixed stability between the positioning mold frame 300 and the stator core 100.

[0033] When the tensioning member 330 passes through the stator core 100 and is threadedly connected to the abutment plate 320, tightening the tensioning member 330 allows the disc body 311 and the abutment plate 320 to press against both ends of the stator core 100 respectively, thereby fixing the positioning mold frame 300 and the stator core 100 as a whole. During this process, the disc body 311 and the abutment plate 320 form a two-way clamping structure, effectively limiting the axial displacement or circumferential deflection of the stator core 100 that may occur during processing, ensuring that the marking hole 313a of the positioning hole 130 to be processed remains aligned with the drilling rig 420.

[0034] In some embodiments, please refer to Figure 3 and Figure 4The positioning base 200 also includes a base body 220. The bottoms of the two abutment blocks 210 are detachably connected to the base body 220. By combining the detachable abutment blocks 210 with the base body 220, the shape of the abutment part 211 can be quickly adjusted. The inner side of the abutment block 210 is provided with an abutment part 211 that is adapted to the weld bead groove 110. The tight contact between the abutment part 211 and the weld bead groove 110 effectively eliminates the installation gap of the stator core 100.

[0035] In practical implementation, the base body 220 is the basic structure for supporting the abutment block 210. It can be made of cast iron or welded steel plate, and its function is to provide a stable installation reference for the abutment block 210. The abutment block 210 is fixed to the base body 220 by bolts or pins. Specifically, a threaded hole and bolt connection can be used to facilitate the replacement of abutment blocks 210 with appropriate sizes according to the weld bead groove 110. The abutment part 211 is the contact surface on the inner side of the abutment block 210 that matches the shape of the weld bead groove 110. Specifically, it can be an arc-shaped protrusion with the same curvature as the weld bead groove 110. Its function is to restrict the radial displacement of the stator core 100 by tightly fitting against the inner wall of the weld bead groove 110.

[0036] During operation, the base body 220 serves as a support platform and is fixed to the machine tool bed 410 via connecting holes 221. Two abutment blocks 210 are bolted to both sides of the base body 220, with their inner abutment portions 211 embedded in the weld bead grooves 110 of the stator core 100, ensuring that the holes to be machined on the stator core 100 remain vertically upward. When machining stator cores 100 of different specifications, the matching relationship between the abutment portions 211 and the weld bead grooves 110 can be adjusted by replacing the abutment blocks 210 to ensure positioning accuracy.

[0037] In some embodiments, please refer to Figure 2 The base body 220 is provided with a connection hole 221. By providing the connection hole 221 on the base body 220, the positioning base 200 and the machine tool bed 410 are reliably connected, eliminating positioning errors caused by insufficient clamping force or vibration.

[0038] The connecting hole 221 is a hole structure used to fix the base body 220 to the external equipment. It can be a threaded hole or a through hole, and can be detachably connected to the external equipment by bolts.

[0039] When the positioning base 200 is installed on the machine tool, the connecting hole 221 is aligned with the threaded hole on the bed 410, and the bolt passes through the connecting hole 221 and is screwed into the threaded hole of the bed 410 to complete the fastening. Thus, the base body 220 and the bed 410 form a rigid connection, which prevents the positioning base 200 from shifting due to vibration or force during processing, and ensures that the stator core 100 remains stable during drilling.

[0040] This embodiment discloses a machine tool for machining stator core positioning holes, including a stator core positioning hole machining fixture and a drilling machine 400. The drilling machine 400 includes a bed 410 and a drilling rig 420. The base body 220 is detachably connected to the bed 410. An existing drilling machine 400 can be modified by installing the machining fixture and the drilling machine 400 together. The drilling rig 420 is positioned relative to the marking hole 313a, and the drilling rig 420 can directly drill positioning holes on the stator core 100 targeting the marking hole 313a.

[0041] In the specific implementation process, the drilling machine 400 is a device used to drill holes in the workpiece. Specifically, the drilling machine 400 is a drilling and milling machine. The bed of the drilling machine 400 and the base body 220 are connected by bolts to achieve relative fixation between the two.

[0042] In some embodiments, a moving unit 430 is provided between the bed 410 and the base body 220, which can drive the base body 220 to move relative to the X-axis and Y-axis directions. The position of the base body 220 can be directly adjusted via the moving unit 430, eliminating the need for repeated disassembly and reassembly of the stator core 100, significantly improving processing efficiency. Furthermore, the two-dimensional moving mechanism can eliminate the influence of stator core 100 assembly errors on processing accuracy, avoiding positioning hole misalignment due to accumulated errors.

[0043] In the specific implementation process, the moving unit 430 is an adjustable mechanism that connects the bed body 410 and the base body 220. Specifically, it can adopt a ball screw pair or a linear guide pair, and control the displacement of the base body 220 in the plane through a drive device.

[0044] The X-axis and Y-axis refer to two mutually perpendicular axes in a planar coordinate system. Specifically, they can be moved independently in both directions through an orthogonally arranged guide rail structure to adjust the position of the base body 220 in the horizontal plane.

[0045] Specifically, the moving unit 430 may include an X-axis slide and a Y-axis slide, which are connected in series via cross roller guides. For example, the X-axis slide is fixed to the surface of the bed 410, the Y-axis slide is mounted on the X-axis slide, and the base body 220 is connected to the Y-axis slide. The displacement of the X-axis and Y-axis can be adjusted manually or electrically to achieve precise positioning in a two-dimensional plane.

[0046] Once the marking hole 313a of the positioning mold 300 determines the position 130 to be machined, the moving unit 430 drives the base body 220 through displacement in the X and Y axes, causing the stator core 100 to move as a whole until the central axis of the marking hole 313a coincides with the machining axis of the drilling machine 420. At this point, the drilling machine 420 can directly drill along the marking hole 313a without the need for repeated manual adjustments to the clamping position of the stator core 100. During this process, the planar bidirectional movement function of the moving unit 430 enables precise calibration of the positioning hole machining reference.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A tooling for machining positioning holes in a stator core, comprising a stator core, wherein a weld bead groove and a keyway are provided on the circumferential surface of the stator core; characterized in that, Also includes: The positioning base includes two opposing abutment blocks, which are respectively inserted into the two weld grooves of the stator core to adjust the positioning hole of the stator core to be processed to face upward. A positioning mold frame includes a positioning disk, which includes a disk body, a positioning key, and a positioning plate. The disk body abuts against one end of the stator core. The positioning key and the positioning plate are arranged perpendicular to the disk body and connected to the edge of the disk body. The positioning key and the positioning plate are spaced 2π / Nrad apart from the central axis of the disk body. The positioning key is inserted into the keyway. The positioning plate is provided with marking holes for marking the positioning holes to be processed in the stator core.

2. The stator core positioning hole machining fixture according to claim 1, characterized in that, The positioning disk also includes N claws, which are integrally connected to the disk body. The N claws are equidistantly arranged around the central axis of the positioning disk, and the claws can engage the edge of the stator core.

3. The stator core positioning hole machining fixture according to claim 2, characterized in that, The positioning key and the positioning plate are detachably connected to the two adjacent claws.

4. The stator core positioning hole machining fixture according to claim 1, characterized in that, The positioning mold frame also includes an abutment plate and a tensioning member. One end of the tensioning member is fixedly connected to the disc body, and the other end of the tensioning member is threadedly connected to the abutment plate via the stator core. The disc body and the abutment plate abut against both ends of the stator core, respectively.

5. The stator core positioning hole machining fixture according to claim 1, characterized in that, The positioning base also includes a base body, and the bottoms of the two abutting blocks are detachably connected to the base body. The inner side of the abutting block is provided with an abutting part that is adapted to the weld groove.

6. The stator core positioning hole machining fixture according to claim 5, characterized in that, The base body is provided with connection holes.

7. A machine tool for machining positioning holes in stator cores, characterized in that, The invention includes a stator core positioning hole machining fixture and a drilling machine as described in any one of claims 1-6, wherein the drilling machine includes a bed and a drilling rig, the base body is detachably connected to the bed, and the drilling rig is positioned relative to the marking hole.

8. The machine tool for machining stator core positioning holes according to claim 7, characterized in that, A moving unit is provided between the bed and the base body. The moving unit can drive the base body to move relative to the X-axis and Y-axis directions to adjust the alignment of the drilling rig with the marking hole.

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