Automatic coil dispensing machine and automatic dispensing method

Abstract

The invention discloses an automatic coil dispensing machine and an automatic dispensing method, and is applied to the technical field of automatic coil dispensing equipment. The base is rotationally connected with an indexing rotary disc assembly and movably connected with a dispensing assembly based on a position adjusting assembly, the dispensing assembly is used for dispensing a coil located at a dispensing station, and the base is fixedly connected with a coil adjusting assembly at the dispensing station, and the coil adjusting assembly is used for driving the coil located at the dispensing station to rotate or turn over. The base is further provided with a coil conveying assembly used for achieving automatic feeding and discharging of coils. The dispensing device has the technical effects that the structure is simple, the dispensing efficiency is improved, and the multi-position dispensing requirement is met.

Description

Technical Field

[0001] This invention relates to the field of automatic coil dispensing equipment, and particularly to an automatic coil dispensing machine and an automatic dispensing method. Background Technology

[0002] In the field of electronic power, transformers, as core components for energy conversion and voltage regulation, have their performance stability closely related to the manufacturing process of the coils. To ensure that the coils do not become loose or lose insulation performance due to factors such as vibration and temperature changes during long-term operation, adhesive is usually applied at specific locations. The curing action of the adhesive fixes the windings, strengthens insulation, and assists in heat dissipation. These adhesive application locations are often distributed in multiple areas such as the coil end face, winding gaps, and lead interfaces. Moreover, the number, distribution density, and amount of adhesive required at different transformer coil models vary significantly. Currently, most coil dispensing devices on the market are single-station, single-dispensing structures. Their working principle is to apply adhesive by aligning a fixed dispensing needle with a preset position on the coil. However, when dealing with a large number of dispensing positions on transformer coils that are widely distributed, these devices reveal significant limitations: Firstly, the dispensing process relies excessively on manual intervention. After dispensing at each position, operators must manually rotate, flip, or translate the coil to adjust the relative position between the coil and the dispensing needle before starting the dispensing program again. This operating mode not only prolongs the dispensing cycle of a single coil, resulting in low production efficiency and difficulty in meeting the needs of large-scale mass production, but also increases labor intensity and significantly raises labor costs due to frequent manual intervention. Secondly, dispensing accuracy is difficult to guarantee, and problems such as dispensing position deviation and uneven adhesive amount are prone to occur. For transformer coils with high precision requirements (such as high-frequency transformers and miniature transformers for precision instruments), such errors may directly lead to insufficient adhesive coverage, increased risk of short circuits in adjacent windings, and even affect the electrical performance parameters of the coil. Therefore, it is necessary to develop a device that can achieve automated, multi-position precise dispensing and reduce manual intervention to meet the needs of multi-position dispensing for transformer coils. Summary of the Invention

[0003] The primary objective of this invention is to provide an automatic coil dispensing machine, which has the advantages of simple structure, improved dispensing efficiency, and the ability to meet dispensing needs at multiple locations.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic coil dispensing machine, comprising a base; an indexing turntable assembly is rotatably connected to the base, and a dispensing assembly for dispensing a coil located at the dispensing station is movably connected to the base based on a position adjustment assembly; a coil adjustment assembly for driving the coil located at the dispensing station to rotate or flip is fixedly connected to the base at the dispensing station; and a coil conveying assembly for realizing automatic loading and unloading of coils is also provided on the base.

[0005] The present invention is further configured such that: the indexing turntable assembly includes a rotary cylinder fixedly connected to the base in the horizontal direction and an indexing turntable fixedly connected to the rotary cylinder in the same direction, wherein at least two sets of adhesive dotting seats are uniformly provided on the indexing turntable in the circumferential direction.

[0006] The present invention is further configured such that: the position adjustment assembly includes a horizontal lead screw adjustment slide fixedly connected to the base along the X direction and an inclined lead screw adjustment slide fixedly connected to the sliding end of the horizontal lead screw adjustment slide along the Y direction; a telescopic lead screw adjustment slide is fixedly connected to the sliding end of the inclined lead screw adjustment slide; and the dispensing assembly is fixedly connected to the sliding end of the telescopic lead screw adjustment slide.

[0007] The present invention is further configured such that: the dispensing assembly includes an inclined sliding plate fixedly connected to the sliding end of the telescopic screw adjusting slide along an inclined direction and an automatic dispensing valve fixedly connected to the inclined sliding plate, a dispensing tube fixedly connected to the automatic dispensing valve, and at least one dispensing cylinder for dispensing glue to the automatic dispensing valve fixedly connected to the base.

[0008] The present invention is further configured such that the angle between the inclined sliding plate and the horizontal plane is between 15° and 35°.

[0009] The present invention is further configured such that: the coil adjustment assembly includes a rotating block symmetrically rotatably connected to the dispensing base along the horizontal direction, and a coil mounting base rotatably connected between the rotating blocks for mounting the coil; a first driving bevel gear with its axis arranged along the horizontal direction is coaxially fixedly connected to the rotating mounting base; a lifting cylinder is fixedly connected to the base along the vertical direction; a horizontal lifting seat is fixedly connected to the telescopic end of the lifting cylinder along the horizontal direction; a rotary drive motor is fixedly connected to the horizontal lifting seat along the vertical direction; a horizontal rotating seat is fixedly connected to the rotating end of the rotary drive motor; the horizontal rotating seat is connected to the rotating block through a plug-in assembly, thereby driving the rotating block to rotate; and a second driving bevel gear that cooperates with the first driving bevel gear is movably connected to the horizontal rotating seat along the vertical direction based on the lifting cylinder.

[0010] The present invention is further configured such that: the plug-in assembly includes at least two arc-shaped connecting blocks fixedly connected to the horizontal rotating seat along the vertical direction, and a plurality of plug-in blocks fixedly connected to the arc-shaped connecting blocks away from the horizontal rotating seat at uniform intervals along the direction. The head of the plug-in block is conical, and the bottom of the rotating block is uniformly provided with a plurality of plug-in grooves that cooperate with the plug-in blocks along the circumferential direction. The inner wall of the dispensing seat is provided with a rotating sliding groove along the circumferential direction, and a rotating sliding block is fixedly connected to the side wall of the rotating block and slidably connected in the rotating sliding groove.

[0011] The present invention is further configured such that: the coil mounting base is provided with a coil mounting groove for positioning the coil, and the opening end of the rotating mounting groove has a flared structure.

[0012] The present invention is further configured such that: the coil conveying assembly includes a coil feeding conveyor line and a coil unloading conveyor line fixedly connected to the base along the horizontal direction; a vertical lead screw lifting slide is also fixedly connected to the base along the vertical direction; a first horizontal lead screw conveying slide is fixedly connected to the sliding end of the vertical lead screw lifting slide along the X direction; a second horizontal lead screw conveying slide is fixedly connected to the sliding end of the first horizontal lead screw conveying slide along the Y direction; a clamping cylinder is fixedly connected to the sliding end of the second horizontal lead screw conveying slide; and a coil clamping block for clamping the coil is fixedly connected to the clamping end of the clamping cylinder.

[0013] The second objective of this invention is to provide an automatic coil dispensing method, which has the advantages of simple structure, improved dispensing efficiency, and meeting the dispensing needs of multiple locations.

[0014] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic coil dispensing method, using an automatic coil dispensing machine as described in any of the above technical solutions, comprising: Step 1, the coil conveying assembly conveys the coil to the preparation station of the indexing turntable assembly, and the indexing turntable assembly conveys the coil located at the preparation station to the dispensing station. Step 2: The coil adjustment assembly rotates, flips, or rotates and flips the coil simultaneously to adjust its position. Step 3: While adjusting the coil position, the position adjustment component adjusts the position of the dispensing component to achieve dispensing at the specified position on the coil; Step 4: After the dispensing is completed, the indexing turntable assembly will swap the positions of the coil located at the dispensing station and the coil located at the preparation station. The coil conveying assembly will unload the coil after dispensing and convey the coil without dispensing to the preparation station of the indexing turntable assembly.

[0015] In summary, the present invention has the following beneficial effects: 1. The coil conveying assembly, through the cooperation of a vertical screw lifting slide, a first horizontal screw conveying slide, a second horizontal screw conveying slide, and a clamping cylinder, can automatically clamp un-glued coils from the coil feeding conveyor line to the preparation position of the indexing turntable assembly, and clamp glued coils from the dispensing seat to the coil unloading conveyor line. The entire process requires no manual handling. The coil adjustment assembly eliminates the need for manual rotation or flipping of the coil: when coil rotation is required, the lifting cylinder raises the horizontal lifting seat, causing the arc-shaped connecting block and insertion block on the horizontal rotating seat to insert into the insertion slot at the bottom of the rotating block. At this time, the rotation drive motor drives the horizontal rotating seat to rotate, and the interaction between the insertion block and the insertion slot drives the rotating block to rotate, thereby causing the coil mounting seat and coil to rotate horizontally. When coil flipping is required, the lifting cylinder raises the second drive bevel gear, causing it to align with the coil... The first drive bevel gear on the coil mounting base engages, and the power of the rotary drive motor drives the coil mounting base to rotate around the horizontal axis through the bevel gear transmission. By adjusting the lifting height of the lifting cylinder, the coil can be rotated or rotated independently, or rotated and rotated simultaneously, completely replacing manual adjustment and reducing labor intensity and cost. The position adjustment component, through three-stage adjustment of the horizontal screw adjustment slide, the tilt screw adjustment slide, and the telescopic screw adjustment slide, can drive the dispensing component to achieve position adjustment. Combined with the precise control of the coil posture by the coil adjustment component, it can accurately align multiple dispensing positions such as the coil end face, winding gap, and lead interface, ensuring uniform glue amount and accurate positioning, effectively reducing the risk of short circuit between adjacent windings, improving the electrical performance stability of the coil, with a simple structure, improved dispensing efficiency, and meeting the dispensing needs of multiple positions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram of the indexing turntable assembly and the coil adjustment assembly in this embodiment; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 yes Figure 2 Enlarged diagram of part B; Figure 5 This is a partial structural schematic diagram of the coil adjustment assembly in this embodiment.

[0017] Reference numerals: 1. Base; 2. Indexing turntable assembly; 22. Indexing rotary table; 23. Dispensing seat; 3. Position adjustment assembly; 31. Horizontal lead screw adjusting slide; 32. Inclined lead screw adjusting slide; 33. Telescopic lead screw adjusting slide; 4. Dispensing assembly; 41. Inclined sliding plate; 42. Automatic dispensing valve; 43. Dispensing tube; 44. Dispensing cylinder; 5. Coil adjustment assembly; 51. Rotating block; 52. Coil mounting base; 53. First drive bevel gear; 54. Lifting electric cylinder; 55. Horizontal lifting seat; 56. Rotary drive motor 57. Horizontal rotating seat; 58. Plug-in assembly; 581. Arc-shaped connecting block; 582. Plug-in block; 583. Plug-in slot; 59. Lifting cylinder; 510. Second drive bevel gear; 511. Rotary sliding groove; 512. Rotary sliding block; 513. Coil mounting slot; 6. Coil conveying assembly; 61. Coil feeding conveyor line; 62. Coil unloading conveyor line; 63. Vertical screw lifting slide; 64. First horizontal screw conveying slide; 65. Second horizontal screw conveying slide; 66. Clamping cylinder; 67. Coil clamping block. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example 1: refer to Figures 1 to 5 An automatic coil dispensing machine includes a base 1, an indexing turntable assembly 2 rotatably connected to the base 1, and a dispensing assembly 4 movably connected to the base 1 based on a position adjustment assembly 3 for dispensing a coil located at a dispensing station. A coil adjustment assembly 5 is fixedly connected to the base 1 at the dispensing station for rotating or flipping the coil located at the dispensing station. The position of the dispensing is adjusted by the position adjustment assembly 3, and the coil is rotated or flipped by the coil adjustment assembly 5 to achieve precise alignment of the coil end face, winding gap, lead wire interface, and other dispensing positions. A coil conveying assembly 6 is also provided on the base 1 for automatic loading and unloading of the coil.

[0020] refer to Figure 2 Specifically, the indexing turntable assembly 2 includes a rotary cylinder fixedly connected to the base 1 along the horizontal direction and an indexing turntable 22 fixedly connected to the rotary cylinder on the same axis. At least two sets of dispensing seats 23 are evenly arranged on the indexing turntable 22 along the circumferential direction. In this embodiment, the indexing turntable 22 has two dispensing seats 23. The rotary cylinder rotates the indexing turntable 22 180° at a time. The position closer to the dispensing assembly 4 is the dispensing position, and the position farther from the dispensing assembly 4 is the preparation position. The coil adjustment assembly 5 is located at the dispensing position.

[0021] refer to Figure 1Specifically, the position adjustment component 3 includes a horizontal lead screw adjustment slide 31 fixedly connected to the base 1 along the X direction and an inclined lead screw adjustment slide 32 fixedly connected to the sliding end of the horizontal lead screw adjustment slide 31 along the Y direction. A telescopic lead screw adjustment slide 33 is fixedly connected to the sliding end of the inclined lead screw adjustment slide 32. The dispensing component 4 is fixedly connected to the sliding end of the telescopic lead screw adjustment slide 33. The position adjustment component 3 can drive the dispensing component 4 to achieve position adjustment through the three-stage adjustment of the horizontal lead screw adjustment slide 31, the inclined lead screw adjustment slide 32 and the telescopic lead screw adjustment slide 33.

[0022] refer to Figure 1 Specifically, the dispensing assembly 4 includes an inclined sliding plate 41 fixedly connected along an inclined direction to the sliding end of the telescopic screw adjusting slide 33, and an automatic dispensing valve 42 fixedly connected to the inclined sliding plate 41. A dispensing tube 43 is fixedly connected to the automatic dispensing valve 42. At least one glue supply cylinder 44 for supplying glue to the automatic dispensing valve 42 is fixedly connected to the base 1. The glue supply cylinder 44 automatically supplies glue to the automatic dispensing valve 42. During dispensing, the dispensing tube 43 dispenses glue in an inclined state relative to the dispensing seat 23. In this embodiment, the angle between the inclined sliding plate 41 and the horizontal plane is between 15° and 35°, preferably 25°.

[0023] refer to Figures 2 to 5Specifically, the coil adjustment assembly 5 includes a rotating block 51 symmetrically rotatably connected to the dispensing base 23 along the horizontal direction, and a coil mounting base 52 rotatably connected between the rotating blocks 51 for mounting the coil. The coil mounting base 52 has a coil mounting groove 513 for positioning the coil, and the opening end of the rotating mounting groove is flared to facilitate coil installation. A first drive bevel gear 53 with its axis aligned horizontally is coaxially fixed to the rotating mounting base. A lifting cylinder 54 is fixedly connected vertically to the base 1. A horizontal lifting seat 55 with its horizontal orientation is fixedly connected to the extension end of the lifting cylinder 54. A rotary drive motor 56 is fixedly connected vertically to the horizontal lifting seat 55. A horizontal rotating seat 57 is fixedly connected to the rotating end of the rotary drive motor 56. The horizontal rotating seat 57 and the rotating block 51 are connected via a plug-in assembly 58, thereby driving the rotating block 51. The rotating assembly 58 includes at least two arc-shaped connecting blocks 581 fixedly connected to the horizontal rotating base 57 along the vertical direction based on the lifting cylinder 59, and several insertion blocks 582 fixedly connected to the arc-shaped connecting blocks 581 away from the horizontal rotating base 57 at evenly spaced intervals. The heads of the insertion blocks 582 are tapered to facilitate insertion. The bottom of the rotating block 51 has several evenly spaced intervals along the circumferential direction. The insertion groove 583 that mates with the insertion block 582 has a rotating sliding groove 511 formed along the circumferential direction on the inner wall of the dispensing base 23. A rotating sliding block 512 that is slidably connected to the side wall of the rotating block 51 and is fixedly connected to the rotating sliding groove 511. When the coil needs to be rotated, the lifting cylinder 54 drives the rotary drive motor 56 and the horizontal rotating seat 57 to rise until the insertion block 582 fixedly connected to the arc-shaped connecting block 581 is inserted into the insertion groove 583 of the rotating block 51, thereby realizing the connection between the horizontal rotating seat 57 and the rotating block 51. Subsequently, the rotary drive motor 56 drives the horizontal rotating seat 57 to rotate, thereby driving the rotating block 51 and the coil fixedly connected in the coil mounting slot 513 to rotate in the horizontal direction. When it is necessary to flip the motor, the lifting cylinder 59 drives the second drive bevel gear 510 to rise and mesh with the first drive bevel gear 53, thereby driving the coil to flip. At the same time, by adjusting the lifting height of the lifting cylinder 54, the coil can be driven to rotate or flip independently, and the coil can also be driven to rotate and flip synchronously, making the structure more compact.

[0024] refer to Figure 1Specifically, the coil conveying assembly 6 includes a coil feeding conveyor line 61 and a coil unloading conveyor line 62, which are fixedly connected to the base 1 in the horizontal direction. A vertical lead screw lifting slide 63, arranged in the vertical direction, is also fixedly connected to the base 1. A first horizontal lead screw conveying slide 64, arranged in the X direction, is fixedly connected to the sliding end of the vertical lead screw lifting slide 63. A second horizontal lead screw conveying slide 65, arranged in the Y direction, is fixedly connected to the sliding end of the first horizontal lead screw conveying slide 64. A clamping device is fixedly connected to the sliding end of the second horizontal lead screw conveying slide 65. The cylinder 66 has a clamping end fixedly connected to a coil clamping block 67 for clamping the coil. The coil conveying assembly 6, through the cooperation of the vertical screw lifting slide 63, the first horizontal screw conveying slide 64, the second horizontal screw conveying slide 65 and the clamping cylinder 66, can automatically clamp the un-glued coil from the coil loading conveyor line 61 to the preparation position of the indexing turntable assembly 2, and clamp the glued coil from the glue dispensing seat 23 to the coil unloading conveyor line 62. The whole process does not require manual handling, which greatly reduces the cost of manual loading and unloading and improves the efficiency of coil loading and unloading.

[0025] Example 2: An automatic coil dispensing method, using an automatic coil dispensing machine as shown in Example 1, includes: Step 1: The coil conveying assembly 6 conveys the coil to the preparation station of the indexing turntable assembly 2, and the indexing turntable assembly 2 conveys the coil located at the preparation station to the dispensing station. Step 2: The coil adjustment component 5 rotates, flips, or rotates and flips the coil simultaneously to adjust its position. Step 3: While adjusting the coil position, the position adjustment component 3 adjusts the position of the dispensing component 4 to achieve dispensing at the specified position of the coil; Step 4: After the dispensing is completed, the indexing turntable assembly 2 will swap the positions of the coil located at the dispensing station and the coil located at the preparation station. The coil conveying assembly 6 will unload the coil after the dispensing is completed and convey the coil without dispensing to the preparation station of the indexing turntable assembly 2.

[0026] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic coil dispensing machine, comprising a base (1); characterized in that, The base (1) is rotatably connected to an indexing turntable assembly (2) and a dispensing assembly (4) for dispensing glue to a coil located at the dispensing station is movably connected to a position adjustment assembly (3). The base (1) is fixedly connected to a coil adjustment assembly (5) for driving the coil located at the dispensing station to rotate or flip. The base (1) is also provided with a coil conveying assembly (6) for realizing automatic loading and unloading of coils.

2. The automatic coil dispensing machine according to claim 1, characterized in that, The indexing turntable assembly (2) includes a rotary cylinder fixedly connected to the base (1) in the horizontal direction and an indexing turntable (22) fixedly connected to the rotary cylinder in the coaxial direction. At least two sets of adhesive dotting seats (23) are uniformly provided on the indexing turntable (22) in the circumferential direction.

3. The automatic coil dispensing machine according to claim 1, characterized in that, The position adjustment assembly (3) includes a horizontal lead screw adjustment slide (31) fixedly connected to the base (1) along the X direction and an inclined lead screw adjustment slide (32) fixedly connected to the sliding end of the horizontal lead screw adjustment slide (31) along the Y direction. A telescopic lead screw adjustment slide (33) is fixedly connected to the sliding end of the inclined lead screw adjustment slide (32). The dispensing assembly (4) is fixedly connected to the sliding end of the telescopic lead screw adjustment slide (33).

4. The automatic coil dispensing machine according to claim 3, characterized in that, The dispensing assembly (4) includes an inclined sliding plate (41) fixedly connected to the sliding end of the telescopic screw adjusting slide (33) along the inclined direction and an automatic dispensing valve (42) fixedly connected to the inclined sliding plate (41). A dispensing tube (43) is fixedly connected to the automatic dispensing valve (42), and at least one glue supply cylinder (44) for supplying glue to the automatic dispensing valve (42) is fixedly connected to the base (1).

5. An automatic coil dispensing machine according to claim 4, characterized in that, The angle between the inclined sliding plate (41) and the horizontal plane is between 15° and 35°.

6. The automatic coil dispensing machine according to claim 2, characterized in that, The coil adjustment assembly (5) includes a rotating block (51) symmetrically rotatably connected to the dispensing base (23) along the horizontal direction, and a coil mounting base (52) rotatably connected between the rotating block (51) for mounting the coil. A first drive bevel gear (53) with its axis arranged along the horizontal direction is coaxially fixedly connected to the rotating mounting base. A lifting cylinder (54) is fixedly connected to the base (1) along the vertical direction. A horizontal lifting seat (55) arranged along the horizontal direction is fixedly connected to the telescopic end of the lifting cylinder (54). A rotary drive motor (56) is fixedly connected to the horizontal lifting seat (55) along the vertical direction. A horizontal rotating seat (57) is fixedly connected to the rotating end of the rotary drive motor (56). The horizontal rotating seat (57) is connected to the rotating block (51) based on the plug-in component (58) to drive the rotating block (51) to rotate. A second drive bevel gear (510) that cooperates with the first drive bevel gear (53) is movably connected to the horizontal rotating seat (57) along the vertical direction based on the lifting cylinder (59).

7. An automatic coil dispensing machine according to claim 6, characterized in that, The plug-in assembly (58) includes at least two arc-shaped connecting blocks (581) fixedly connected to the horizontal rotating seat (57) along the vertical direction, and a plurality of plug-in blocks (582) fixedly connected at even intervals along the direction to one end of the arc-shaped connecting blocks (581) away from the horizontal rotating seat (57). The head of the plug-in block (582) is conical. The bottom of the rotating block (51) is evenly provided with a plurality of plug-in grooves (583) that cooperate with the plug-in block (582) along the circumferential direction. The inner wall of the dispensing seat (23) is provided with a rotating sliding groove (511) along the circumferential direction. The side wall of the rotating block (51) is fixedly connected with a rotating sliding block (512) that is slidably connected in the rotating sliding groove (511).

8. The automatic coil dispensing machine according to claim 7, characterized in that, The coil mounting base (52) is provided with a coil mounting groove (513) for positioning the coil, and the opening end of the rotating mounting groove has a flared structure.

9. An automatic coil dispensing machine according to claim 1, characterized in that, The coil conveying assembly (6) includes a coil feeding conveyor line (61) and a coil unloading conveyor line (62) fixedly connected to the base (1) along the horizontal direction. A vertical screw lifting slide (63) is also fixedly connected to the base (1) along the vertical direction. A first horizontal screw conveying slide (64) is fixedly connected to the sliding end of the vertical screw lifting slide (63) along the X direction. A second horizontal screw conveying slide (65) is fixedly connected to the sliding end of the first horizontal screw conveying slide (64) along the Y direction. A clamping cylinder (66) is fixedly connected to the sliding end of the second horizontal screw conveying slide (65). A coil clamping block (67) for clamping the coil is fixedly connected to the clamping end of the clamping cylinder (66).

10. An automatic coil dispensing method, using an automatic coil dispensing machine as described in any one of claims 1-9, characterized in that, include: Step 1: The coil conveying assembly (6) conveys the coil to the preparation station of the indexing turntable assembly (2), and the indexing turntable assembly (2) conveys the coil located at the preparation station to the dispensing station. Step 2: The coil adjustment assembly (5) rotates, flips, or rotates and flips the coil simultaneously to adjust its position. Step 3: While adjusting the coil position, the position adjustment component (3) adjusts the position of the dispensing component (4) to achieve dispensing at the specified position of the coil; Step 4: After dispensing, the indexing turntable assembly (2) swaps the positions of the coil located at the dispensing station and the coil located at the preparation station. The coil conveying assembly (6) unloads the coil after dispensing and conveys the undispensed coil to the preparation station of the indexing turntable assembly (2).

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