Processing technology and device of polyamide-imide enameled coil

Abstract

The application discloses a processing technology of a polyamide-imide enameled coil, which comprises the following steps: inserting a winding plate and a winding part into each other, and then buckling them together on a mold core of a winding mechanism, and winding an enameled wire on the winding plate to form a hollow coil; then horizontally buckling the hollow coil on a setting machine, and extruding the hollow coil in a height direction by the setting machine to obtain a finished product hollow coil. Meanwhile, a processing device is disclosed, which comprises the winding mechanism and the setting machine, the winding mechanism comprises a mold core, an outer portion of the mold core is provided with a baffle, an end portion of the mold core is provided with a winding groove, the winding groove is detachably connected with a winding part, the winding part and the winding groove are key-connected, an end portion of the winding part is detachably connected with the winding plate, and the end portion of the winding plate extends to an axial outer side of the baffle and is mutually attached to the end portion of the mold core. The application can reduce the processing cost of the winding plate, and improve the setting effect of the hollow coil.

Description

Technical Field

[0001] This invention relates to a processing technology for hollow coils, and more particularly to a processing technology and apparatus for polyamide-imide enameled coils. Background Technology

[0002] Currently, the processing technology for hollow coils with elongated shapes and curved cross-sections involves first attaching a thin winding plate to the end of the die core on a winding machine, and then winding the coil around the outside of the winding plate by a winding mechanism to form an elongated coil semi-finished product. This semi-finished coil is then extruded by a shaping machine to form the finished hollow coil. However, existing winding and shaping machines for this type of hollow coil have several drawbacks:

[0003] Firstly, the winding plate in existing winding machines is fixed to the end of the mold core by means of threaded or snap-fit ​​connections. However, this connection method is not only easily limited by the installation structure, resulting in low axial installation accuracy or poor connection stability, but also cannot guarantee the rotational stability of the winding plate and the winding effect. Furthermore, since the winding plate and its connecting parts need to be integrally machined, when manufacturers produce winding plates of different specifications, they also need to process each connecting part accordingly, thereby increasing the raw material and processing costs of the winding plate.

[0004] Secondly, existing shaping machines mainly consist of an upper pressure block and a lower mold base. Both the lower mold base and the upper pressure block have arc-shaped shaping surfaces, which are used to bend the hollow coil into shape by pressing the two shaping surfaces together. During the pressing process, the hollow coil is simultaneously heated by external equipment, causing the self-adhesive paint layer on its surface to melt and re-solidify, thus allowing adjacent enameled wires in the hollow coil to bond together after bending. However, this shaping device has two drawbacks. First, it is difficult to position the hollow coil, causing it to shift during the pressing process. Second, because there is no corresponding limiting or adjusting mechanism between the upper pressure block and the lower mold base, the positions of the two shaping surfaces cannot be completely overlapped, resulting in misalignment during pressing and further reducing the shaping effect of the hollow coil.

[0005] Therefore, existing processing equipment for this hollow coil suffers from high winding plate processing costs and poor shaping effect of the shaping machine. Summary of the Invention

[0006] The purpose of this invention is to provide a processing technology and apparatus for polyamide-imide enameled coils. This reduces the processing cost of the winding board and improves the shaping effect of hollow coils.

[0007] The technical solution of this invention: A processing method for polyamide-imide enameled coils, comprising the following steps:

[0008] ① After the winding plate and the winding part are inserted into each other, they are fastened together on the mold core of the winding mechanism, and the enameled wire is wound on the winding plate to form a hollow coil A.

[0009] ② Horizontally fasten hollow coil A onto the shaping machine, and the shaping machine presses hollow coil A along the height direction, so that the cross-sectional shape of hollow coil A changes from rectangular to arc shape, thus obtaining the finished hollow coil.

[0010] The processing apparatus used in the aforementioned processing technology for polyamide-imide enameled coils includes a winding mechanism and a setting machine. The winding mechanism includes a mold core, with a retaining edge sleeved on the outside of the mold core. A winding groove is provided at the end of the mold core, and a winding part is detachably connected inside the winding groove. The winding part and the winding groove are keyed together. A winding plate is detachably connected to the end of the winding part. The end of the winding plate extends to the axial outer side of the retaining edge and fits against the end of the mold core. The maximum width of the winding plate is consistent with the inner diameter of the retaining edge. The setting machine includes a lower mold base, a setting groove on the lower mold base, an insertion part in the middle of the setting groove, a telescopic rod above the lower mold base, an upper pressure block connected to the lower end of the telescopic rod, an arc-shaped setting surface at the bottom of the upper pressure block, and a slot for the insertion part in the middle of the setting surface.

[0011] In the aforementioned processing device, the lower end of the lower mold base is detachably connected to an intermediate block. The lower mold base has a long strip-shaped first mounting groove in the middle of the shaping groove. The lower end of the insertion part is fastened to the first mounting groove, and the upper end of the insertion part extends to the top of the shaping groove.

[0012] In the aforementioned processing device, the lower mold bases on both sides of the shaping groove are connected to the intermediate block by screws. The bottom of the lower mold base is provided with a second mounting groove located outside the screws, and a compression spring is provided in the second mounting groove. A guide rod is connected to one side of the lower mold base. The lower end of the guide rod extends to the outside of the lower mold base and slides to connect with the intermediate block. The intermediate block is provided with a guide groove that matches the guide rod. The end of the guide rod is provided with a pressing plate that passes through the guide groove and extends to the outside of the intermediate block.

[0013] In the aforementioned processing device, the top of the intermediate block is provided with a third winding groove, a pressure plate is provided between the lower mold base and the intermediate block, the lower end of the insertion part is provided with a first step, the lower end of the first step is fastened to the third winding groove, the upper end of the first step is in contact with the pressure plate, and the lower end of the compression spring is in contact with the pressure plate; the pressure plate is provided with a limiting opening for the insertion part to pass through, the length of the limiting opening is the same as the first mounting groove and is greater than the length of the insertion part.

[0014] In the aforementioned processing device, the lower end of the intermediate block is bolted to a base, and the intermediate block is provided with multiple mounting ports for mating bolts around its perimeter. The mounting ports are U-shaped and arranged side by side perpendicular to the length direction of the insertion part.

[0015] In the aforementioned processing device, the end of the winding part is provided with a groove, one end of which completely penetrates the winding part, and the other end of the winding part is provided with a slot, which is connected to the groove; the end of the winding plate is provided with a fitting part that slides to connect the groove, and the end of the fitting part is provided with a locking block that engages with the slot.

[0016] In the aforementioned processing device, the two ends of the winding plate form arc surfaces, and the middle part of the winding plate is provided with a second step located in the winding groove.

[0017] In the aforementioned processing device, a positioning hole is provided in the middle of the winding section, and a ball-joint pin is provided on the mold core outside the positioning hole. The steel ball of the ball-joint pin extends into the winding groove and engages with the positioning hole.

[0018] Compared with the prior art, the present invention has the following characteristics:

[0019] (1) By detachably connecting the winding part to the mold core and making the ends of the winding plate and the mold core fit together, the present invention can axially position the winding part, ensuring the positional stability of the winding plate and the winding effect; by optimizing the connection structure between the winding plate and the winding part, the present invention can realize the individual disassembly and replacement of the winding plate, thereby reducing the production cost of the winding part and facilitating the disassembly and assembly of the manufacturer.

[0020] (2) By cooperating with the plug and slot in the shaping machine, the hollow coil can be positioned by the plug, so that the hollow coil is located in the middle of the shaping groove after being sleeved. On the other hand, the lower mold base and the upper pressure block can be limited when pressed together, thereby improving the shaping effect of the present invention.

[0021] (3) By specifically defining the connection structure between the lower mold base, the intermediate block, and the insertion part, the insertion part can be replaced and its position adjusted during installation, thereby achieving length adjustment and positioning of the insertion part; by cooperating with the installation port, the lateral position of the intermediate block can be adjusted and fixed, thereby achieving horizontal adjustment and positioning of the lower mold base, ensuring the pressing stability between the upper pressure block and the lower mold base; under the above cooperation, the horizontal position of the shaping groove and the insertion part can be adjusted with the upper pressure block, further improving the pressing stability and shaping effect of the shaping machine;

[0022] (4) Through the structural cooperation of the lower mold base, the intermediate block and the compression spring, the lower mold base can be axially lowered during the molding process as the upper pressure block is pressed down, and after the pressing is completed, the hollow coil is reset together with the separation of the upper pressure block; on this basis, through the cooperation of the guide rod and the pressing plate, the operator can press the lower mold base with the pressing plate when picking up, so that the hollow coil is separated from the shaping groove, which is convenient for the operator to pick up;

[0023] Therefore, the present invention can reduce the processing cost of the winding board and improve the shaping effect of the hollow coil. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the winding mechanism;

[0025] Figure 2 yes Figure 1 The left view;

[0026] Figure 3 This is a structural diagram of the stenter in its initial state;

[0027] Figure 4 This is a schematic diagram of the structure of the shaping machine when the upper pressure block is fully pressed together;

[0028] Figure 5 This is a schematic diagram of the shaping machine after pressing is completed;

[0029] Figure 6 It is a drawing of the finished hollow coil;

[0030] Figure 7 This is a cross-sectional view of the finished hollow coil.

[0031] The markings in the attached diagram are as follows: 1-mold core, 2-stop edge, 3-winding groove, 4-winding part, 5-winding plate, 6-lower mold base, 7-shaping groove, 8-insertion part, 9-telescopic rod, 10-upper pressure block, 11-slot, 12-intermediate block, 13-first mounting groove, 14-second mounting groove, 15-compression spring, 16-guide rod, 17-guide groove, 18-pressing plate, 19-pressure piece, 20-first step part, 21-limiting port, 22-base, 23-mounting port, 24-sliding groove, 25-bayonet, 26-fitting part, 27-block, 28-second step part, 29-positioning hole, 30-ball pin. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0033] Example. A processing method for polyamide-imide enameled coils includes the following steps:

[0034] ① After the winding plate and the winding part are inserted into each other, they are fastened together on the mold core of the winding mechanism, and the enameled wire is wound on the winding plate to form a hollow coil A.

[0035] ② Horizontally fasten hollow coil A onto the shaping machine, and the shaping machine extrudes hollow coil A along the height direction, so that the cross-sectional shape of hollow coil A changes from rectangular to arc shape, resulting in the finished hollow coil. The overall shape of the finished hollow coil is long and the cross-sectional shape is arc shape.

[0036] In step ①, the surface of the enameled wire is sequentially coated with a polyamide-imide varnish layer and a self-adhesive varnish layer. The self-adhesive varnish layer is made by coating a conventional hollow coil with self-adhesive varnish that can be re-melted. This allows the self-adhesive varnish layer on the surface of the hollow coil to be re-melted and re-cured by hot air heating during the shaping process, so that the enameled wires in the hollow coil can be re-bonded and shaped after bending.

[0037] The processing apparatus used in the processing of the polyamide-imide enameled coil described above is configured as follows: Figure 1 As shown, the device includes a winding mechanism and a shaping machine. The winding mechanism includes a mold core 1, with a retaining edge 2 sleeved on the outside of the mold core 1. The mold core 1 and the retaining edge 2 are winding components in a conventional winding machine. The end of the mold core 1 has a winding groove 3, and a winding part 4 is detachably connected inside the winding groove 3. The winding part 4 and the winding groove 3 are keyed together. The end of the winding part 4 is detachably connected to a winding plate 5. The end of the winding plate 5 extends to the axial outer side of the retaining edge 2 and fits against the end of the mold core 1. The maximum width of the winding plate 5 is equal to the inner hole of the retaining edge 2. The diameter is consistent, and the end of the retaining edge 2 can be connected to push plates with different inner hole sizes, so that the push plates can cooperate with winding plates 5 of different specifications to achieve the pushing function; the shaping machine includes a lower mold base 6, a shaping groove 7 is provided on the lower mold base 6, an insertion part 8 is provided in the middle of the shaping groove 7, and a telescopic rod 9 is provided above the lower mold base 6. The telescopic rod 9 can be a cylinder or an electric push rod. The lower end of the telescopic rod 9 is connected to an upper pressure block 10. The bottom of the upper pressure block 10 is provided with an arc-shaped shaping surface, and the middle of the shaping surface is provided with a slot 11 that matches the insertion part 8.

[0038] The lower end of the lower mold base 6 is detachably connected to the middle block 12. The lower mold base 6 has a long strip-shaped first mounting groove 13 in the middle of the shaping groove 7. The lower end of the plug-in part 8 is fastened to the first mounting groove 13, and the upper end of the plug-in part 8 extends to the top of the shaping groove 7.

[0039] The lower mold bases 6 on both sides of the shaping groove 7 are connected to the intermediate block 12 by screws. The bottom of the lower mold base 6 is provided with a second mounting groove 14 located outside the screw, and a compression spring 15 is provided in the second mounting groove 14. A guide rod 16 is connected to one side of the lower mold base 6. The guide rod 16 and the screw are staggered. The lower end of the guide rod 16 extends to the outside of the lower mold base 6 and slides to connect with the intermediate block 12. The intermediate block 12 is provided with a guide groove 17 that matches the guide rod 16. The guide groove 17 is U-shaped and one end is connected to the outside. The end of the guide rod 16 is provided with a pressing plate 18 that passes through the guide groove 17 and extends to the outside of the intermediate block 12. When the shaping machine is in the natural state, there is a gap between the bottom surface of the lower mold base 6 and the top surface of the intermediate block 12.

[0040] The top of the intermediate block 12 is provided with a third winding groove 3. A pressure plate 19 is provided between the lower mold base 6 and the intermediate block 12. The lower end of the insertion part 8 is provided with a first step part 20. The lower end of the first step part 20 is fastened to the third winding groove 3. The upper end of the first step part 20 is in contact with the pressure plate 19. The lower end of the compression spring 15 is in contact with the pressure plate 19. The pressure plate 19 is provided with a limiting opening 21 for the insertion part 8 to pass through. The length of the limiting opening 21 is the same as that of the first mounting groove 13 and is greater than the length of the insertion part 8.

[0041] The lower end of the intermediate block 12 is bolted to a base 22, which is fixed on the frame of the shaping machine. The intermediate block 12 is provided with multiple mounting ports 23 for mating bolts around its perimeter. The mounting ports 23 are U-shaped and one end is connected to the outside. Each mounting port 23 is arranged in a row perpendicular to the length direction of the insertion part 8.

[0042] The winding part 4 has a groove 24 at one end, which completely passes through the winding part 4. The other end of the winding part 4 has a slot 25, which is connected to the groove 24. The winding plate 5 has a fitting part 26 that slides through the groove 24. The fitting part 26 has a locking block 27 that engages with the slot 25. When the locking block 27 and the slot 25 are fully engaged, the outer end of the fitting part 26 passes through the groove 24 and fits against the inner wall of the winding groove 3.

[0043] The two ends of the winding plate 5 form arc surfaces, and the middle part of the winding plate 5 is provided with a second step portion 28 located in the winding groove 3.

[0044] The winding section 4 has a positioning hole 29 in the middle, and a ball-bearing pin 30 is provided on the mold core 1 outside the positioning hole 29. The steel ball of the ball-bearing pin 30 extends into the winding groove 3 and engages with the positioning hole 29.

[0045] The working principle of this invention is as follows: When processing the hollow coil, one end of the winding part 4 is first inserted into the winding groove 3 of the mold core 1, and the inner end of the winding plate 5 and the end face of the mold core 1 are made to fit together. After the winding part 4 is inserted, the positioning hole 29 on its inner side engages with the ball pin 30 in the mold core 1, thus realizing the insertion and fixation of the winding part 4. After the winding part 4 is installed, the winding plate 5 extending to the outside of the mold core 1 serves as the winding part to wind the enameled wire, so that the enameled wire can form a long hollow coil after winding. After the winding is completed, the retaining edge 2 extends out and pushes the hollow coil on the winding plate 5, so that the hollow coil can detach from the winding plate 5 and fall off naturally after being pushed. When the specifications of the winding plate 5 need to be changed, the operator can pull out the winding part 4 and then directly pull the winding plate 5 out of the slide groove 24, thereby realizing the individual replacement of the winding plate 5; when the locking block 27 is inserted into the locking slot 25, the winding plate 5 can be fixed by inserting it into the winding groove 3, thus ensuring the positional accuracy of the winding plate 5.

[0046] After the hollow coil is wound and formed, the operator places it in the shaping groove 7 and positions it by engaging the inner hole of the hollow coil with the insertion part 8. After the hollow coil is inserted, the telescopic rod 9 drives the upper pressure block 10 to press down and bend the hollow coil, so that the upper and lower surfaces of the hollow coil are respectively attached to the shaping groove 7 and the shaping surface, achieving the bending effect. During the pressing process, the slot 11 at the bottom of the upper pressure block 10 first engages with the insertion part 8, thereby using the insertion part 8 to limit the position of the upper pressure block 10 and ensure the positional accuracy of the upper pressure block 10 during the pressing process. When the upper pressure block 10 contacts the hollow coil, the lower mold base 6 descends along with the hollow coil under the downward pressure, and drives the compression spring 15 to contract. After the lower mold base 6 moves to the bonding plate 19, the shaping groove 7 reaches the low position, and the upper pressure block 10 continues to press down to bend the hollow coil. When the slot 11 is pressed down to fully engage with the insertion part 8, the upper pressure block 10 reaches the low position and is pressed into shape. Then, the telescopic rod 9 contracts to drive the upper pressure block 10 to reset, so that the lower mold base 6 drives the hollow coil to rise together under the spring action of the slide groove 24, so that the hollow coil moves up to the initial engagement position.

[0047] After the lower mold base 6 is reset, the operator first presses the pressing plate 18, causing the pressing plate 18 to guide the lower mold base 6 to descend again via the guide rod 16. The hollow coil will bend and deform, forming a friction limit with the insertion part 8, thus maintaining its original height position and separating from the shaping groove 7. At this time, the operator can directly extract the hollow coil, avoiding the increased difficulty of picking up the hollow coil if it is completely attached to the shaping groove 7. If the friction limit between the hollow coil and the insertion part 8 is small, the hollow coil will directly detach from the insertion part 8 and pop out under the rebound action of the lower mold base 6, thereby effectively reducing the difficulty of picking up the hollow coil.

[0048] When the inner hole length of hollow coils of different specifications changes, the manufacturer can also replace the plug part 8, and after the plug part 8 is positioned, the horizontal position is limited by the cooperation of the pressure plate 19 and the pressure spring 15, so as to prevent the plug part 8 from moving after installation and improve its pressing stability.

Claims

1. A processing method for polyamide-imide enameled coils, characterized in that... This includes the following steps: ① After the winding plate and the winding part are inserted into each other, they are fastened together on the mold core of the winding mechanism, and the enameled wire is wound on the winding plate to form a hollow coil A. ② Horizontally fasten hollow coil A onto the shaping machine, and the shaping machine presses hollow coil A along the height direction, so that the cross-sectional shape of hollow coil A changes from rectangular to arc shape, thus obtaining the finished hollow coil; The processing of this polyamide-imide enameled coil is carried out by a processing device, which includes a winding mechanism and a shaping machine. The winding mechanism includes a mold core (1), a retaining edge (2) is sleeved on the outside of the mold core (1), and a winding groove (3) is provided at the end of the mold core (1). A winding part (4) is detachably connected in the winding groove (3). The winding part (4) and the winding groove (3) are keyed together. A winding plate (5) is detachably connected to the end of the winding part (4). The end of the winding plate (5) extends to the shaft of the retaining edge (2). Outward and in contact with the end of the mold core (1), the maximum width of the winding plate (5) is consistent with the inner hole diameter of the side guard (2); the shaping machine includes a lower mold base (6), a shaping groove (7) is provided on the lower mold base (6), a plug-in part (8) is provided in the middle of the shaping groove (7), a telescopic rod (9) is provided above the lower mold base (6), an upper pressure block (10) is connected to the lower end of the telescopic rod (9), an arc-shaped shaping surface is provided at the bottom of the upper pressure block (10), and a slot (11) for the plug-in part (8) is provided in the middle of the shaping surface.

2. The processing technology of a polyamide-imide enameled coil according to claim 1, characterized in that: The lower end of the lower mold base (6) is detachably connected to the middle block (12). The lower mold base (6) has a long strip-shaped first mounting groove (13) in the middle of the shaping groove (7). The lower end of the plug-in part (8) is fastened to the first mounting groove (13), and the upper end of the plug-in part (8) extends to the top of the shaping groove (7).

3. The processing technology of a polyamide-imide enameled coil according to claim 2, characterized in that: The lower mold bases (6) on both sides of the shaping groove (7) are connected to the middle block (12) by screws. The bottom of the lower mold base (6) is provided with a second mounting groove (14) located outside the screw. A compression spring (15) is provided in the second mounting groove (14). A guide rod (16) is connected to one side of the lower mold base (6). The lower end of the guide rod (16) extends to the outside of the lower mold base (6) and slides to connect with the middle block (12). The middle block (12) is provided with a guide groove (17) that matches the guide rod (16). The end of the guide rod (16) is provided with a pressing plate (18) that passes through the guide groove (17) and extends to the outside of the middle block (12).

4. The processing technology of a polyamide-imide enameled coil according to claim 3, characterized in that: The top of the intermediate block (12) is provided with a third winding groove (3), and a pressure plate (19) is provided between the lower mold base (6) and the intermediate block (12). The lower end of the plug-in part (8) is provided with a first step part (20). The lower end of the first step part (20) is fastened to the third winding groove (3), and the upper end of the first step part (20) is in contact with the pressure plate (19). The lower end of the compression spring (15) is in contact with the pressure plate (19). The pressure plate (19) is provided with a limiting port (21) for the plug-in part (8) to pass through. The length of the limiting port (21) is the same as that of the first mounting groove (13) and is greater than that of the plug-in part (8).

5. The processing technology of a polyamide-imide enameled coil according to claim 2, characterized in that: The lower end of the intermediate block (12) is bolted to a base (22). The intermediate block (12) has multiple mounting ports (23) for matching bolts around its perimeter. The mounting ports (23) are U-shaped and are arranged side by side perpendicular to the length direction of the insertion part (8).

6. The processing method of a polyamide-imide enameled coil according to claim 1, characterized in that: The winding part (4) has a groove (24) at one end, which completely penetrates the winding part (4). The winding part (4) at the other end of the groove (24) has a slot (25), and the slot (25) and the groove (24) are connected to each other. The winding plate (5) has a fitting part (26) that slides and connects to the groove (24) at one end, and a locking block (27) that engages and connects to the slot (25) at one end.

7. The processing method for a polyamide-imide enameled coil according to claim 1, characterized in that: The two ends of the winding plate (5) form arc surfaces, and the middle part of the winding plate (5) is provided with a second step (28) located in the winding groove (3).

8. The processing method of a polyamide-imide enameled coil according to claim 1, characterized in that: The winding part (4) is provided with a positioning hole (29) in the middle. The mold core (1) outside the positioning hole (29) is provided with a ball pin (30). The steel ball of the ball pin (30) extends into the winding groove (3) and engages with the positioning hole (29).

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