Positioning disc and motor shell machining jig

Abstract

The utility model provides a kind of positioning disc and motor shell machine tooling jig, it is related to motor machining technical field.Positioning disc is used to position clamping motor shell workpiece on machine tool chuck, positioning disc includes positioning disc body and multiple connecting holes, positioning disc body has central axis;Every connecting hole is through positioning disc body along central axis direction, multiple connecting holes are used to in installation state, with the installation fixed hole on the end face of motor shell workpiece one-to-one correspondence, and through connecting piece detachable connection.Motor shell machine tooling jig includes positioning disc, connecting piece and machine tool chuck.In the motor shell workpiece processing process, positioning disc is directly clamped by machine tool chuck, to realize the positioning of motor shell workpiece, instead of directly using pressing plate to exert the positioning mode of pressure.This mode effectively reduces the deformation of motor shell workpiece in processing process, reduces the rebound effect after unclamping, to improve the precision of motor shell workpiece after processing, to meet drawing requirement.

Description

Technical Field

[0001] This utility model relates to the field of motor processing technology, and in particular to a positioning plate and a motor housing machining fixture. Background Technology

[0002] In the field of motor machining technology, the motor housing is a key structural component, and its machining accuracy, especially the accuracy of the internal cavity dimensions, directly affects the performance, efficiency, and service life of the motor. Currently, in the machining process of motor housings, pressure plates are commonly used to apply pressure to the workpiece to position it, thereby completing the turning and milling of the internal cavity and end faces.

[0003] However, for relatively soft materials such as aluminum motor housings, the pressure from the pressure plate can cause uneven stress distribution on the workpiece surface, leading to elastic deformation. During machining, the workpiece is cut in this "pre-deformed" state, and the internal cavity dimensions temporarily appear to be acceptable. But once machining is complete and the pressure plate is removed, the stress accumulated inside the workpiece is released, causing a springback effect that affects the geometric accuracy of the machined workpiece's internal cavity, making it difficult to meet the 0.02 mm cylindricity requirement in the drawings.

[0004] Therefore, how to effectively reduce the deformation of motor housing workpieces during processing, thereby improving the processing accuracy after processing, has become a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0005] This invention addresses the technical problem of effectively reducing deformation of motor housing workpieces during machining, thereby improving machining accuracy. It provides a positioning disc and a machining fixture for motor housings.

[0006] A positioning disc for positioning and clamping a motor housing workpiece on a machine tool chuck, comprising: The positioning disc body has a central axis; Multiple connecting holes are provided, each of which penetrates the positioning disk body along the central axis. These multiple connecting holes are used to correspond one-to-one with the mounting and fixing holes on the end face of the motor housing workpiece in the installed state, and are detachably connected by connectors.

[0007] Furthermore, the plurality of connecting holes are arranged at equal angular intervals around the central axis along the circumference of the positioning disk body.

[0008] Furthermore, the number of connection holes is seven.

[0009] Furthermore, the outer peripheral wall of the positioning disk body is provided with an annular conical surface that gradually expands from top to bottom along the central axis.

[0010] Furthermore, the positioning disk body is provided with a positioning pin hole along the central axis direction, and the positioning pin hole is used to cooperate with the positioning hole provided on the end face of the motor housing workpiece for positioning.

[0011] Furthermore, the positioning disk body is made of steel.

[0012] On the other hand, this utility model also provides a machining fixture for motor housings, comprising: The positioning disk described in any of the above embodiments; A connector is disposed between the connecting hole and the mounting hole for detachably connecting the positioning plate and the motor housing workpiece. A machine tool chuck, wherein the jaws of the machine tool chuck are used to clamp the positioning plate.

[0013] Furthermore, the connecting element is a bolt.

[0014] Furthermore, the machining fixture for the motor housing also includes a positioning pin, which is configured to pass sequentially through the positioning pin hole on the positioning plate body and the positioning hole on the end face of the motor housing workpiece.

[0015] Furthermore, the clamping surface of the claw and the annular conical surface of the outer peripheral wall of the positioning disk body are mating surfaces.

[0016] Compared with the prior art, the positioning disk provided in this embodiment of the utility model has at least the following technical effects: The positioning plate includes a positioning plate body and multiple connecting holes. The positioning plate body has a central axis; each connecting hole penetrates the positioning plate body along the central axis. These multiple connecting holes, in the installed state, correspond one-to-one with the mounting holes on the end face of the motor housing workpiece and are detachably connected via connectors. During the machining of the motor housing workpiece, the positioning plate is directly clamped by the machine tool chuck, thereby achieving positioning of the motor housing workpiece, instead of using a pressure plate to apply pressure. This method effectively reduces deformation of the motor housing workpiece during machining and minimizes the springback effect after unclamping, thus improving the machining accuracy of the motor housing workpiece and ensuring it meets the drawing requirements.

[0017] Since the motor housing machining fixture includes the positioning plate of any of the above embodiments, it at least has the technical effects of the positioning plate, which will not be elaborated here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the positioning disk in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the motor housing workpiece in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a motor housing machining fixture in one embodiment of the present invention; Figure 4 for Figure 3 A top-view structural diagram; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure at point AA; Figure 6 for Figure 5 A magnified view of a portion at point A.

[0020] Reference numerals: 10, positioning plate; 101, positioning plate body; 102, connecting hole; 103, annular conical surface; 104, positioning pin hole; 20, motor housing workpiece; 201, mounting and fixing hole; 202, positioning hole; 30, machine tool chuck; 301, jaw; 3011, clamping surface. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0023] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0024] In the field of motor machining technology, the motor housing is a key structural component, and its machining accuracy, especially the accuracy of the internal cavity dimensions, directly affects the performance, efficiency, and service life of the motor. Currently, in the machining process of motor housings, pressure plates are commonly used to apply pressure to the workpiece to position it, thereby completing the turning and milling of the internal cavity and end faces.

[0025] However, for relatively soft materials such as aluminum motor housings, the pressure from the pressure plate can cause uneven stress distribution on the workpiece surface, leading to elastic deformation. During machining, the workpiece is cut in this "pre-deformed" state, and the internal cavity dimensions temporarily appear to be acceptable. But once machining is complete and the pressure plate is removed, the stress accumulated inside the workpiece is released, causing a springback effect that affects the geometric accuracy of the machined workpiece's internal cavity, making it difficult to meet the 0.02 mm cylindricity requirement in the drawings.

[0026] Therefore, how to effectively reduce the deformation of motor housing workpieces during processing, thereby improving the processing accuracy after processing, has become a technical problem that technicians in this field urgently need to solve.

[0027] Please refer to the attached document. Figure 1 and attached Figure 2 As shown, one embodiment of the present invention provides a positioning disk for positioning and clamping a motor housing workpiece 20 on a machine tool chuck 30. The positioning disk 10 includes a positioning disk body 101 and a plurality of connecting holes 102. The positioning disk body 101 has a central axis. Each connecting hole 102 penetrates the positioning disk body 101 along the central axis. The plurality of connecting holes 102 are used to correspond one-to-one with the mounting and fixing holes 201 on the end face of the motor housing workpiece 20 in the installed state, and are detachably connected by connectors.

[0028] In this embodiment, the positioning disk 10 includes a positioning disk body 101 and multiple connecting holes 102. The positioning disk body 101 has a central axis. Each connecting hole 102 penetrates the positioning disk body 101 along the central axis. The multiple connecting holes 102 are used to correspond one-to-one with the mounting holes 201 on the end face of the motor housing workpiece 20 in the installed state, and are detachably connected by connectors. During the machining of the motor housing workpiece 20, the positioning disk 10 is directly clamped by the machine tool chuck 30, thereby achieving the positioning of the motor housing workpiece 20, instead of directly using a pressure plate to apply pressure. This method effectively reduces the deformation of the motor housing workpiece 20 during machining and reduces the springback effect after unclamping, thereby improving the accuracy of the machined motor housing workpiece 20 and making it meet the drawing requirements.

[0029] In some optional embodiments, multiple connecting holes 102 are arranged at equal angular intervals around the central axis along the circumference of the positioning disk body 101. This design makes the preload of the connector evenly distributed along the circumference, thereby effectively reducing the local deformation of the end face of the motor housing workpiece 20 and further improving the machining accuracy of the motor housing workpiece 20.

[0030] In some optional embodiments, the number of connecting holes 102 is the same as the number of mounting and positioning holes 202 on the end face of the motor housing workpiece 20. In the installed state, the connecting holes 102 correspond one-to-one with the mounting and fixing holes 201. For example, there are 7 connecting holes 102, which correspond one-to-one with the 7 mounting and fixing holes 201 on the end face of the motor housing workpiece 20, and are detachably connected by connectors.

[0031] In some optional embodiments, the outer peripheral wall of the positioning disk body 101 is provided with an annular conical surface 103 that gradually expands from top to bottom along the central axis.

[0032] In some optional embodiments, the positioning disc body 101 is provided with positioning pin holes 104 along the central axis direction. The positioning pin holes 104 are used to engage with positioning holes 202 provided on the end face of the motor housing workpiece 20 for positioning. The number of positioning pin holes 104 can be, but is not limited to, two. The positioning pin holes 104 enable the circumferential positioning accuracy of the motor housing workpiece 20 to be ≤0.02mm.

[0033] In some optional embodiments, the positioning disk body 101 is made of steel, which has excellent strength and rigidity, ensuring that the positioning disk 10 maintains good dimensional stability during the machining of the motor housing workpiece 20. When subjected to external forces, the positioning disk 10 hardly deforms, thereby effectively reducing positioning errors caused by deformation.

[0034] In addition, please refer to the appendix. Figure 3 To be continued Figure 6As shown, one embodiment of this utility model provides a machining fixture for a motor housing, including a positioning plate 10, a connecting member, and a machine tool chuck 30 as described in any of the above embodiments. The connecting member is disposed between a connecting hole 102 and a mounting hole 201, for detachably connecting the positioning plate 10 to the motor housing workpiece 20. The jaws 301 of the machine tool chuck 30 are used to clamp the positioning plate 10. Since the machining fixture for the motor housing includes the positioning plate 10 as described in any of the above embodiments, it at least possesses the technical effects of the positioning plate 10, which will not be elaborated further here. The machine tool chuck 30 is a three-jaw chuck.

[0035] In some alternative embodiments, the connector can be, but is not limited to, bolts. In practice, a suitable connector can be selected based on specific assembly requirements and the operating environment.

[0036] In some optional embodiments, the motor housing machining fixture also includes a locating pin configured to pass sequentially through a locating pin hole 104 on the locating plate body 101 and a locating hole 202 on the end face of the motor housing workpiece 20.

[0037] In some optional embodiments, the clamping surface 3011 and the annular conical surface 103 of the outer peripheral wall of the positioning disk body 101 are mating surfaces. Specifically, the clamping surface 3011 is configured as a conical structure that mates with the annular conical surface 103. When the chuck 301 tightens radially, the conical structure contacts the annular conical surface, and the conical slope can apply a downward pull force toward the chuck seat to the positioning disk 10 while radially clamping it, thereby ensuring the stability and safety of the motor housing workpiece 20 during processing and effectively preventing the risk of the motor housing workpiece 20 falling off.

[0038] The method of using the motor housing machining fixture provided in this embodiment of the utility model is as follows: Install the positioning plate: First, align the positioning plate with the motor housing workpiece. Then, pass the positioning pins through the positioning holes on the positioning plate and the mounting holes on the end face of the motor housing workpiece to achieve circumferential positioning, ensuring that the connecting holes correspond one-to-one with the mounting holes. Subsequently, use bolts to fix the connecting holes and the mounting holes to ensure a stable connection between the positioning plate and the motor housing workpiece.

[0039] Overall clamping: Flip the connected "motor housing workpiece-positioning plate" assembly so that the positioning plate faces downward, and then hoist it into the machine tool chuck of the vertical lathe. Start the drive mechanism of the machine tool chuck, and the jaws tighten radially. While radially clamping the positioning plate, a downward pull force is applied to the positioning plate toward the chuck seat, thereby ensuring the stability and safety of the motor housing workpiece during the machining process.

[0040] Machining execution: Start the machine tool and machine the inner cavity of the motor housing workpiece according to the preset program. During the machining process, the friction and downward force generated by the conical surface contact work together to resist the cutting force, preventing the motor housing workpiece from loosening or shifting.

[0041] The motor housing machining fixture provided in this embodiment of the utility model has at least the following technical effects: (1) Reduce workpiece deformation: By connecting the motor housing workpiece and the positioning plate into a whole for processing, the pressure applied directly to the workpiece is reduced, and the deformation caused by clamping is effectively avoided, thereby ensuring the machining accuracy of the inner cavity cylindricity and meeting the drawing requirements.

[0042] (2) Improve processing stability: The positioning plate with the cone angle design and the machine tool chuck cooperate to keep the workpiece stable during processing and prevent processing errors caused by vibration or loosening.

[0043] (3) Easy to operate: After the positioning plate is manually installed on the workpiece, it is flipped over and installed on the machine tool. The machine tool's three-jaw chuck clamps the positioning plate and the processing can be started. The operation is simple and convenient, which improves production efficiency.

[0044] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A positioning disc for positioning and clamping a motor housing workpiece on a machine tool chuck, characterized in that, include: The positioning disc body has a central axis; Multiple connecting holes are provided, each of which penetrates the positioning disk body along the central axis. These multiple connecting holes are used to correspond one-to-one with the mounting and fixing holes on the end face of the motor housing workpiece in the installed state, and are detachably connected by connectors.

2. The positioning disk according to claim 1, characterized in that, The plurality of connecting holes are arranged at equal angular intervals around the central axis along the circumference of the positioning disk body.

3. The positioning disk according to claim 1, characterized in that, The number of connection holes is 7.

4. The positioning disk according to claim 1, characterized in that, The outer peripheral wall of the positioning disk body is provided with an annular conical surface that gradually expands from top to bottom along the central axis.

5. The positioning disk according to claim 1, characterized in that, The positioning disk body is provided with a positioning pin hole along the central axis direction. The positioning pin hole is used to cooperate with the positioning hole provided on the end face of the motor housing workpiece for positioning.

6. The positioning disk according to claim 1, characterized in that, The positioning disk body is made of steel.

7. A machining fixture for an electric motor housing, characterized in that, include: The positioning disk according to any one of claims 1 to 6; A connector is disposed between the connecting hole and the mounting hole for detachably connecting the positioning plate and the motor housing workpiece. A machine tool chuck, wherein the jaws of the machine tool chuck are used to clamp the positioning plate.

8. The machining fixture for motor housing according to claim 7, characterized in that, The connecting component is a bolt.

9. The machining fixture for motor housing according to claim 7, characterized in that, It also includes a positioning pin, which is configured to pass sequentially through the positioning pin hole on the positioning disk body and the positioning hole on the end face of the motor housing workpiece.

10. The machining fixture for motor housing according to claim 7, characterized in that, The clamping surface of the claw and the annular conical surface of the outer peripheral wall of the positioning disk body are mating surfaces.

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