MSO coil machining apparatus and method

Abstract

To provide a device and a method for machining an MSO coil capable of shortening the machining time of the MSO coil and improving the productivity of a product.SOLUTION: An MSO coil machining apparatus according to an embodiment of the present invention may include a jig for supporting a coil base material having an opening formed at a center in a vertical direction to machine the coil base material, a multi-cutter in which a plurality of blade portions are stacked to form a horizontal slit and an inclined slit on a side surface of the coil base material supported by the jig, and a cutting tool for machining the side surface of the coil base material to connect the horizontal slit and the inclined slit.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for processing an MSO coil, and more particularly to an apparatus and method for processing a plate-shaped MSO coil having a square cross section. [Background technology]

[0002] In an electric vehicle, the motor is a very important component that determines the performance of the vehicle. Recently, various methods have been researched to improve the coil space factor (or conductor occupying ratio) of the coil wound around the rotor or stator of the motor. Typically, methods that have been used include increasing the diameter of the coil or increasing the number of windings.

[0003] However, conventional coils mainly use copper wires with circular vertical cross sections, and when the diameter of such circular coils is increased, there is a fundamental problem in that the circular cross section results in wasted space between the wound coil layers, reducing the space factor of the coil.

[0004] On the other hand, when winding a coil with too small a diameter, the number of windings per unit area increases, which can lead to problems of reduced efficiency and heat generation due to a relative increase in electrical resistance. As such, conventional electric motors have limitations in terms of efficiency and power density, which cannot be increased beyond a certain level due to their low space factor. To improve this, a technology has been developed and is being used that forms conventional coils with circular cross sections into coils with a rectangular cross section, i.e., MSO (Maximum Slot Occupy) coils.

[0005] Conventional MSO coil processing is performed using CNC and wire, but the conventional MSO coil processing process takes too long, resulting in a problem of reduced productivity. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides an MSO coil processing device and method that processes the coil base material while moving in one path using a multi-cutter, thereby reducing the processing time of the MSO coil compared to conventional methods and improving product productivity.

[0007] The problems to be solved by the present invention are not limited to the above problems, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0008] An MSO coil processing device according to one embodiment of the present invention may include a jig that supports a coil base material having an opening formed in the center in the vertical direction for processing, a multi-cutter having multiple stacked blades for forming horizontal slits and inclined slits on the side of the coil base material supported on the jig, and a cutting tool that processes the side of the coil base material to connect the horizontal slits and inclined slits.

[0009] The jigs may include a first jig supported by the coil base material to form the horizontal slit, a second jig supported by the coil base material to form the inclined slit, and a third jig supported by the coil base material to connect the horizontal slit and the inclined slit.

[0010] The first jig may include a first base plate, a first fixing plate provided on the upper surface of the first base plate and having the coil base material fixed to its upper surface, and a first cover provided on the upper end of the first fixing plate so as to pass through the opening and fix the coil base material.

[0011] The second jig may include a second base plate, a second fixing plate arranged diagonally on the upper surface of the second base plate and having the coil base material fixed to its upper surface, support plates arranged on both sides of the second fixing plate and having support legs that extend between the horizontal slits to provide support, and a second cover arranged on the upper end of the second fixing plate so as to pass through the opening and fix the coil base material.

[0012] The third jig may include a third base plate, a third fixed plate erected on the upper surface of the third base plate and having the coil base material fixed to one surface, support plates provided on both sides of the third fixed plate and having support legs extending between the horizontal slits for support, and a third cover provided on the upper end of the third fixed plate so as to pass through the opening and fix the coil base material.

[0013] The support plate may be provided with a plurality of support blocks, on which the support legs are provided, in a detachable manner.

[0014] The support blocks may have a step formed at their rear ends for connection therebetween.

[0015] The multi-cutter may include a first multi-cutter having a plurality of blade portions stacked on the side of the coil base material to form the horizontal slits, and a second multi-cutter having a plurality of blade portions stacked on the side of the coil base material to form the inclined slits.

[0016] The first multi-cutter may be formed by stacking eight blade portions, and the second multi-cutter may be formed by stacking three blade portions.

[0017] The opening may be formed to have a square cross section by drawing or extrusion.

[0018] A method for processing an MSO coil according to another embodiment of the present invention may include the steps of forming an opening with a rectangular cross section in the vertical direction in the center of a coil base material, forming horizontal slits on three of the side surfaces of the coil base material using a multi-cutter having multiple blade portions stacked on them, forming inclined slits on the remaining side surfaces of the coil base material using the multi-cutter having multiple blade portions stacked on them, and processing the side surfaces of the coil base material to connect the horizontal slits and the inclined slits.

[0019] The multi-cutter may form the horizontal slit and the inclined slit while moving in one path. [Effects of the Invention]

[0020] According to one embodiment of the present invention, the coil base material is processed using a multi-cutter while moving along a single path, which makes it possible to shorten the processing time for MSO coils compared to conventional methods and improve product productivity. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 10 shows an MSO coil with an opening machined therein according to one embodiment of the present invention. [Figure 2] FIG. 10 shows horizontal slits machined into an MSO coil according to one embodiment of the present invention. [Figure 3] FIG. 10 shows an MSO coil with angled slits fabricated in accordance with one embodiment of the present invention. [Figure 4] FIG. 10 is a diagram showing how the horizontal slits and the inclined slits of the MSO coil are processed to be connected together according to one embodiment of the present invention. [Figure 5] 2 is a diagram showing a first jig of an MSO coil processing device according to an embodiment of the present invention. FIG. [Figure 6] 1 is a diagram showing a first multi-cutter of an MSO coil processing device according to an embodiment of the present invention. FIG. [Figure 7]FIG. 10 is a diagram showing the cutting of horizontal slits in the MSO coil using the first multi-cutter. [Figure 8] FIG. 2 is a diagram showing a second jig of the MSO coil processing device according to one embodiment of the present invention. [Figure 9] 10 is a diagram showing a second multi-cutter of an MSO coil processing device according to one embodiment of the present invention. FIG. [Figure 10] FIG. 10 is a diagram showing the cutting of inclined slits in the MSO coil using a second multi-cutter. [Figure 11] FIG. 10 is a diagram showing a third jig of the MSO coil processing device according to one embodiment of the present invention. [Figure 12] 1 is a diagram showing a state in which a support plate of an MSO coil processing device according to an embodiment of the present invention supports a coil base material. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] Since the present invention can be modified in various ways and can have various embodiments, a specific embodiment will be described in detail by way of example in the drawings. However, this does not limit the present invention to the specific embodiment, but should be understood as including all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention. In describing the present invention, if it is determined that a detailed description of related publicly known technology may obscure the gist of the present invention, the detailed description will be omitted.

[0023] Terms such as first and second may be used to describe various components, but the components should not be limited by these terms. These terms are used only to distinguish one component from another.

[0024] The terms used in this application are merely used to describe particular embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly dictates otherwise. It should be understood that, in this application, the terms "comprise" or "have" specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0025] Furthermore, throughout the specification, when the term "connected" is used, it does not only mean that two or more components are directly connected, but also that two or more components are indirectly connected via other components, that they are electrically connected as well as physically, or that components designated by different names depending on their position or function are integrated.

[0026] Hereinafter, an embodiment of an MSO coil processing apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the accompanying drawings, the same or corresponding components will be designated by the same drawing numbers, and duplicate descriptions thereof will be omitted.

[0027] FIG. 1 is a diagram showing an MSO coil having an opening formed therein according to one embodiment of the present invention, FIG. 2 is a diagram showing an MSO coil having a horizontal slit formed therein according to one embodiment of the present invention, FIG. 3 is a diagram showing an MSO coil having an inclined slit formed therein according to one embodiment of the present invention, and FIG. 4 is a diagram showing an MSO coil having a horizontal slit and an inclined slit formed therein so as to be connected to each other according to one embodiment of the present invention.

[0028] First, referring to Figure 1, in order to process the MSO coil, an opening 2 is formed in a rectangular parallelepiped coil preform 1. The opening 2 is formed in the center of the coil preform 1 with a rectangular cross section extending vertically, and can be processed by a method such as drawing or extrusion. Each surface of the coil preform 1 with the opening 2 thus formed is polished to process the side walls.

[0029] 2, horizontal slits 4 can be cut on three of the side surfaces of the coil preform 1 using a first multi-cutter 10, which will be described later. Here, the horizontal slits 4 can be cut all at once by moving the first multi-cutter 10, which is made up of multiple blades 12, in one direction.

[0030] 3, the remaining side of the coil preform 1 can be machined with an inclined slit 6 using a second multi-cutter 20. Here, the inclined slit 6 can also be machined at once by moving the second multi-cutter 20, which is made up of multiple blades 22, in one direction.

[0031] 4, the side of the coil preform 1 can be machined to connect the horizontal slits 4 and the inclined slits 6 of the coil preform 1. At this time, the side of the coil preform 1 can be machined using a cutting tool (not shown). As the cutting tool, for example, a tool such as an end mill can be used, and since this is a well-known configuration, a detailed description thereof will be omitted.

[0032] The jigs supported by the coil base material 1 for processing the MSO coil may include a first jig 30 supported by the coil base material 1 for forming the horizontal slit 4, a second jig 40 supported by the coil base material 1 for forming the inclined slit 6, and a third jig 60 supported by the coil base material 1 for connecting the horizontal slit 4 and the inclined slit 6.

[0033] As described above, the process of machining the coil preform 1 will be described below, focusing on the first jig 30, the second jig 40, and the third jig 60. Fig. 5 is a diagram showing a first jig of an MSO coil machining apparatus according to one embodiment of the present invention, Fig. 6 is a diagram showing a first multi-cutter of an MSO coil machining apparatus according to one embodiment of the present invention, and Fig. 7 is a diagram showing machining horizontal slits in the MSO coil using the first multi-cutter.

[0034] The first jig 30 may include a first base plate 32, a first fixing plate 34 provided on the upper surface of the first base plate 32 and having the coil base material 1 fixed to its upper surface, and a first cover 38 provided on the upper end of the first fixing plate 34 so as to pass through the opening 2 and fix the coil base material 1.

[0035] The first fixing plate 34 can be fixed to the upper surface of the first base plate 32 by a first key plate 36 to prevent movement in the longitudinal direction. The first key plate 36 is slidably provided on the upper surface of the first base plate 32 of the first fixing plate 34 and is inserted into the side surface of the first fixing plate 34 in the width direction, thereby restricting movement of the first fixing plate 34 in the longitudinal direction.

[0036] The coil preform 1 is supported on the upper surface of the first fixing plate 34, and the upper surface of the coil preform 1 is covered by a first cover 38 and can be fixed to the first fixing plate 34. In this state where it is supported by the first jig 30, three of the side surfaces of the coil preform 1 remain exposed to the outside.

[0037] At this time, the first multi-cutter 10 can be used to cut horizontal slits 4 into the side surfaces of the coil preform 1. The first multi-cutter 10 is configured by stacking multiple blade sections 12, and because the blade sections 12 are stacked in this manner, it is possible to cut horizontal slits 4 into multiple layers while moving along one path on three side surfaces of the coil preform 1, as shown in FIG.

[0038] FIG. 8 is a diagram showing a second jig of an MSO coil processing apparatus according to one embodiment of the present invention, FIG. 9 is a diagram showing a second multi-cutter of an MSO coil processing apparatus according to one embodiment of the present invention, and FIG. 10 is a diagram showing the processing of an inclined slit in an MSO coil using the second multi-cutter.

[0039] The second jig 40 may include a second base plate 42, a second fixing plate 44 arranged diagonally on the upper surface of the second base plate 42 and having the coil base material 1 fixed to its upper surface, a support plate 50 arranged on both sides of the second fixing plate 44 and having support legs 54 extending between and supporting the horizontal slits 4, and a second cover 48 arranged on the upper end of the second fixing plate 44 so as to pass through the opening 2 and fix the coil base material 1.

[0040] In this embodiment, the second base plate 42 is provided obliquely on the upper surface of the inclined plate 41, but this is merely an example, and the second fixing plate 44 may be provided obliquely on the second base plate 42 itself. What is important is that the second fixing plate 44 must be provided obliquely.

[0041] The second fixing plate 44 can be fixed to the upper surface of the second base plate 42 by a second key plate 46 to prevent movement in the longitudinal direction. The second key plate 46 is slidably provided on the upper surface of the second base plate 42 of the second fixing plate 44 and is inserted into the side surface of the second fixing plate 44 in the width direction, thereby restricting movement of the second fixing plate 44 in the longitudinal direction.

[0042] The coil preform 1 is supported on the upper surface of the second fixing plate 44, and the upper surface of the coil preform 1 is covered by a second cover 48 and can be fixed to the second fixing plate 44. Furthermore, support plates 50 may be provided on both sides of the second fixing plate 44. When supported by the second jig 40 in this manner, both longitudinal side surfaces of the coil preform 1 are fixed by the support plates 50, and one widthwise side surface remains exposed to the outside.

[0043] At this time, the second multi-cutter 20 can be used to cut the inclined slits 6 on the side of the coil preform 1. The second multi-cutter 20 is configured by stacking multiple blade portions 22, and because the blade portions 22 are stacked in this manner, it is possible to cut the inclined slits 6 in multiple layers while moving one side of the coil preform 1 in a single path, as shown in FIG. 10. In addition, because the coil preform 1 is positioned at an angle by the second fixed plate 44, the inclined slits 6 can be easily cut according to specifications while moving the second multi-cutter 20 horizontally.

[0044] As an example, the first multi-cutter 10 may be formed by stacking eight blade portions 12, and the second multi-cutter 20 may be formed by stacking three blade portions 22, and processing can be performed using different numbers of blade portions 12, 22 depending on the thickness and performance of the coil base material 1.

[0045] FIG. 11 is a diagram showing a third jig of an MSO coil processing device according to an embodiment of the present invention.

[0046] The third jig 60 may include a third base plate 62, a third fixed plate 64 erected on the upper surface of the third base plate 62 and having the coil base material 1 fixed to one side, support plates 50 provided on both sides of the third fixed plate 64 and equipped with support legs 54 extending between and supporting the horizontal slits 4, and a third cover 68 provided on the upper end of the third fixed plate 64 so as to pass through the opening 2 and fix the coil base material 1.

[0047] In this embodiment, the third base plate 62 is erected on the upper surface of the horizontal plate 61, but this is merely an example, and the third base plate 62 may be formed integrally with the horizontal plate 61.

[0048] The third fixing plate 64 can be fixed to one surface of the third base plate 62 by a third key plate 66 to prevent movement in the longitudinal direction. The third key plate 66 is slidably provided on one surface of the third base plate 62 of the third fixing plate 64, and is inserted into the side surface of the third fixing plate 64 in the width direction, thereby restricting movement of the third fixing plate 64 in the longitudinal direction.

[0049] The coil preform 1 is supported on one surface of the third fixing plate 64, and the upper surface of the coil preform 1 is covered by a third cover 68 and can be fixed to the third fixing plate 64. Furthermore, a support plate 50 may be provided on each side of the third fixing plate 64. When supported by the third jig 60 in this manner, both side surfaces in the longitudinal direction of the coil preform 1 are fixed by the support plates 50, and one side surface in the width direction (upper surface) remains exposed to the outside.

[0050] At this time, a cutting tool can be used to process the coil preform 1 so as to connect the horizontal slits 4 and the inclined slits 6 formed on the side surface of the coil preform 1. Here, as the cutting tool, a tool such as an end mill can be used as described above.

[0051] FIG. 12 is a diagram showing a state in which a support plate 50 of an MSO coil processing apparatus according to an embodiment of the present invention supports a coil preform.

[0052] Referring to Figure 12, when fixing the coil preform 1 having the slits 4 and 6 formed therein, the support plate 50 prevents the coil preform 1 from flowing into the space formed between the slits 4 and 6, thereby enabling the coil preform 1 to be processed in a stably supported state.

[0053] A plurality of support blocks 52 may be detachably provided on the support plate 50. That is, the support blocks 52 may be provided on the support plate 50 so as to be stacked in multiple layers, thereby enabling the support function to be performed by stacking the support blocks in various ways depending on the size of the coil preform 1, etc.

[0054] A plurality of support legs 54 may protrude and extend from the front surface of the support block 52. The support legs 54 may be inserted between the horizontal slits 4 to support the coil preform 1. The thickness of the support legs 54 may be appropriately designed according to the layer spacing of the coil preform 1. In addition, the rear side of the support plate 50 is supported by a cylinder or the like, so that it can support the coil preform 1 while moving in the front-rear direction. Meanwhile, a step portion 56 for connecting the support blocks 52 to each other may be formed at the rear end thereof.

[0055] Although the present invention has been described above with reference to specific embodiments, it will be understood by those skilled in the art that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention as defined in the claims. [Explanation of symbols]

[0056] 1: Coil base material 2: Opening 4: Horizontal slit 6: Inclined slit 10: First multi-cutter 12: Blade part 20: Second multi-cutter 22: Blade part 30: First jig 32: First base plate 34: First fixing plate 36: First key plate 38: First cover 40: Second jig 41: Inclined plate 42: Second base plate 44: Second fixing plate 46: Second key plate 48: 2nd cover 50: Support plate 52: Support block 54:Support leg 56: Step 60: Third jig 61: Horizontal plate 62: Third base plate 64: Third fixed plate 66: 3rd key plate 68: Third Cover 70:Cutting tools

Claims

1. a jig for supporting a coil base material having an opening formed at the center in the vertical direction for processing; a multi-cutter having a plurality of blades stacked on top of each other to form horizontal slits and inclined slits on the side surface of the coil preform supported by the jig; a cutting tool that processes a side surface of the coil base material to connect the horizontal slit and the inclined slit.

2. The jig is a first jig for supporting the coil preform to form the horizontal slit; a second jig for supporting the coil preform to form the inclined slit; 2. The MSO coil processing device according to claim 1, further comprising: a third jig for supporting the coil preform so as to connect the horizontal slits and the inclined slits.

3. The first jig is a first base plate; a first fixing plate provided on an upper surface of the first base plate, the first fixing plate having the coil base material fixed to an upper surface thereof; 3. The MSO coil processing device according to claim 2, further comprising: a first cover provided on an upper end of the first fixing plate so as to pass through the opening and fix the coil preform.

4. The second jig is A second base plate; a second fixing plate provided obliquely on an upper surface of the second base plate, the second fixing plate having the coil base material fixed to an upper surface thereof; support plates provided on both sides of the second fixing plate and having support legs extending between the horizontal slits for support; 3. The MSO coil processing device according to claim 2, further comprising: a second cover provided on an upper end of the second fixing plate so as to pass through the opening and fix the coil preform.

5. The third jig is A third base plate; a third fixing plate that is erected on an upper surface of the third base plate and has the coil base material fixed to one surface thereof; support plates provided on both sides of the third fixing plate and having support legs extending between the horizontal slits for support; 3. The MSO coil processing device according to claim 2, further comprising: a third cover provided on an upper end of the third fixing plate so as to pass through the opening and fix the coil preform.

6. 6. The MSO coil processing device according to claim 4, wherein a plurality of support blocks, each having the support legs, are detachably mounted on the support plate.

7. 7. The MSO coil processing apparatus according to claim 6, wherein a step portion for connecting the support blocks is formed at the rear end of the support blocks.

8. The multi-cutter is a first multi-cutter having a plurality of stacked blade portions that form the horizontal slits on the side surface of the coil preform; 2. The MSO coil processing device according to claim 1, further comprising: a second multi-cutter having a plurality of stacked blade portions that form the inclined slits on the side surface of the coil base material.

9. 9. The MSO coil processing device according to claim 8, wherein the first multi-cutter is formed by stacking eight blade portions, and the second multi-cutter is formed by stacking three blade portions.

10. The MSO coil processing device according to claim 1 , wherein the opening is formed to have a square cross section by drawing or extrusion.

11. forming an opening having a rectangular cross section in the vertical direction at the center of the coil preform; forming horizontal slits on three of the side surfaces of the coil preform using a multi-cutter having a plurality of blades stacked on top of each other; forming an inclined slit on the remaining side surface of the coil preform using the multi-cutter having a plurality of blade portions stacked thereon; and processing a side surface of the coil preform to connect the horizontal slit and the inclined slit.

12. The method for processing an MSO coil according to claim 11, wherein the multi-cutter forms the horizontal slit and the inclined slit while moving in one path.

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