A self-adhesive sheet stator core lamination press tool

Abstract

The application discloses a self-adhesive sheet stator core lamination tool, which comprises a bottom plate, a core shaft, a positioning pin, a pressing plate, a pull rod I, a gasket, a hexagonal nut, a pressing sleeve, a pressure spring, a pressing ring and a pull rod II. The core shaft is matched with a self-adhesive sheet center hole to perform radial positioning, and the positioning pin is matched with a self-adhesive sheet positioning notch to perform circumferential positioning. The pull rod I, the gasket and the hexagonal nut are used for locking the axial relative position between the pressing plate and the bottom plate. The pull rod II is threadedly connected with the core shaft and compresses the pressure spring through the pressing ring, so that the elastic force is transmitted to the pressing plate through the pressing sleeve, thereby providing elastic compensation for the lamination thickness change during the self-adhesive coating heating and curing and keeping the laminations in the axial compression state.

Description

Technical Field

[0001] This invention relates to the field of tooling for manufacturing motor stator cores, specifically a tooling for stacking self-adhesive stator cores. Background Technology

[0002] Stator cores are typically formed by stacking and fixing multiple laminations to a predetermined thickness. For laminations with a thermosetting self-adhesive coating, after stacking, they need to be heated, held, and cooled under axial pressure to cure the self-adhesive coating between adjacent laminations. This process requires not only that the laminations maintain radial and circumferential alignment during stacking and transport, but also that the laminations remain axially compressed after leaving the press and entering the heating equipment.

[0003] Existing stacking fixtures using bolts or nuts for rigid locking suffer from slight variations in lamination thickness due to changes in the self-adhesive coating state and temperature after unloading from the press and during subsequent heating and cooling processes. The rigid locking structure struggles to compensate for displacement towards the pressure plate as the lamination thickness changes, leading to a decrease in clamping force. Furthermore, without coordinated radial and circumferential positioning during assembly, transport, and heating, relative misalignment between laminations may occur. Therefore, a stacking fixture capable of maintaining lamination positioning and providing elastic clamping compensation for thickness variations is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a self-adhesive stator core stacking fixture, including multiple pull rods I, pressure springs, pressure rings, pull rods II, pressure sleeves, mandrels, multiple positioning pins, pressure plates, and base plates.

[0005] The lower end of the mandrel is supported on the base plate.

[0006] Multiple positioning pins are distributed circumferentially and inserted into the base plate for radial and circumferential positioning of the self-adhesive sheets to be stacked.

[0007] The pressure plate is sleeved on the mandrel and the positioning pin, and is used to press the stacked self-adhesive sheets tightly.

[0008] Multiple tie rods I have their lower ends connected to the base plate and their upper ends passing through the pressure plate.

[0009] The pressure sleeve is fitted onto the mandrel and pressed against the upper end face of the pressure plate.

[0010] The pressure spring is housed within a pressure sleeve.

[0011] The pressure ring is sleeved on the mandrel and pressed against the upper end of the pressure spring.

[0012] The pull rod II is screwed into the top of the mandrel, and a preload is applied to the pressure spring through the pressure ring. The elastic force of the pressure spring is transmitted to the pressure plate through the pressure sleeve, thereby bonding the self-adhesive sheet into a whole.

[0013] Furthermore, the lower end of the pull rod I is threaded to the base plate, and the upper end passes through the pressure plate and engages with the washer and hexagonal nut.

[0014] Furthermore, after the hydraulic press compresses the stacked plates to a preset pressure through the pressure sleeve, the hexagonal nut is locked to maintain the stacked state.

[0015] Furthermore, the pressure spring is sleeved on the outside of the rod portion of the pull rod II.

[0016] The lower end of the pressure spring is supported on the stepped surface of the inner hole of the pressure sleeve, and the upper end is held by the pressure ring.

[0017] Furthermore, the number and distribution of the positioning pins correspond to the positioning slots or outer circle positioning features of the self-adhesive sheet to be stacked.

[0018] Furthermore, the base plate is provided with a central hole that mates with the mandrel and a mounting hole that mates with the positioning pin.

[0019] Furthermore, the pressure plate is provided with a central hole that mates with the mandrel, a through hole that mates with the positioning pin, and a through hole that mates with the pull rod I.

[0020] Compared with existing technologies, the mandrel and the center hole of the self-adhesive sheet are matched, and the positioning pin and the positioning slot of the self-adhesive sheet are matched, so that the stacked stampings are kept radially and circumferentially aligned during assembly, transportation and heating, which helps to reduce the relative misalignment between the stampings.

[0021] The pressure spring applies axial pressure to the pressure plate through the pressure sleeve and can compensate for the displacement of the pressure plate as the thickness changes within its elastic working stroke. This reduces the attenuation of clamping force caused by the change in thickness after rigid locking, which is beneficial to maintaining continuous clamping during the curing of the self-adhesive coating.

[0022] Multiple tie rods I, in conjunction with hexagonal nuts, lock the stacked position. The pressure sleeve, pressure spring, pressure ring, and tie rod II form an adjustable preload structure, facilitating tooling assembly, stacking locking, and pressure release disassembly. Attached Figure Description

[0023] Figure 1 This is an assembly structure diagram of a self-adhesive stator core stacking fixture.

[0024] Figure 2 For tie rod I;

[0025] Figure 3 For pressure ring;

[0026] Figure 4 It is pull rod II.

[0027] Figure 5 For pressure sleeve.

[0028] Figure 6 For the spindle.

[0029] Figure 7 For positioning pins.

[0030] Figure 8 It is a pressure plate.

[0031] Figure 9 It serves as the base plate.

[0032] Figure 10 This is a schematic diagram of a self-adhesive stator core. Detailed Implementation

[0033] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0034] Example 1:

[0035] See Figures 1 to 10 A self-adhesive stator core stacking fixture includes multiple washers 101, multiple hexagonal nuts 102, multiple pull rods I 103, pressure springs 104, pressure rings 105, pull rods II 106, pressure sleeves 107, mandrels 108, multiple positioning pins 109, pressure plates 110, and base plates 111.

[0036] The lower end of the mandrel 108 is supported on the base plate 111.

[0037] Multiple positioning pins 109 are distributed circumferentially and inserted into the base plate 111 for radial and circumferential positioning of the self-adhesive sheets to be stacked.

[0038] The pressure plate 110 is sleeved on the mandrel 108 and the positioning pin 109, and is used to press the stacked self-adhesive sheets.

[0039] The lower ends of multiple tie rods I103 are connected to the base plate 111, and the upper ends pass through the pressure plate 110.

[0040] The pressure sleeve 107 is sleeved on the mandrel 108 and pressed against the upper end face of the pressure plate 110.

[0041] The pressure spring 104 is housed within the pressure sleeve 107.

[0042] The pressure ring 105 is sleeved on the spindle 108 and pressed against the upper end of the pressure spring 104.

[0043] The pull rod II 106 is screwed into the top of the mandrel 108, and a preload is applied to the pressure spring 104 through the pressure ring 105. The elastic force of the pressure spring 104 is transmitted to the pressure plate 110 through the pressure sleeve 107, thereby bonding the self-adhesive sheet into a whole.

[0044] Example 2:

[0045] A self-adhesive stator core stacking fixture, with the same technical content as in Embodiment 1, further wherein the lower end of the pull rod I 103 is threadedly connected to the base plate 111, and the upper end passes through the pressure plate 110 and engages with the washer 101 and the hexagonal nut 102.

[0046] Example 3:

[0047] A self-adhesive stator core stacking fixture, with the same technical content as any one of Embodiments 1-2, further wherein after the hydraulic press presses the stacked sheets to a preset pressure through the pressure sleeve 107, the hexagonal nut 102 is locked to maintain the stacking state.

[0048] Example 4:

[0049] A self-adhesive stator core stacking fixture, with the same technical content as any one of embodiments 1-3, further wherein the pressure spring 104 is sleeved on the outside of the rod portion of the pull rod II 106.

[0050] The lower end of the pressure spring 104 is supported on the inner stepped surface of the pressure sleeve 107, and the upper end is held by the pressure ring 105.

[0051] Example 5:

[0052] A self-adhesive sheet stator core stacking fixture, with the same technical content as any one of embodiments 1-4, further wherein the number and distribution position of the positioning pins 109 correspond to the positioning slots or outer circle positioning features of the self-adhesive sheet to be stacked.

[0053] Example 6:

[0054] A self-adhesive stator core stacking fixture, with the same technical content as any one of embodiments 1-5, further wherein the base plate 111 is provided with a center hole that mates with the mandrel 108 and a mounting hole that mates with the positioning pin 109.

[0055] Example 7:

[0056] A self-adhesive stator core stacking fixture, with the same technical content as any one of embodiments 1-6, further wherein the pressure plate 110 is provided with a center hole that mates with the mandrel 108, a through hole that mates with the positioning pin 109, and a through hole that mates with the pull rod I 103.

[0057] Example 8:

[0058] A self-adhesive stator core stacking fixture includes multiple washers 101, multiple hexagonal nuts 102, multiple pull rods I 103, pressure springs 104, pressure rings 105, pull rods II 106, pressure sleeves 107, mandrels 108, multiple positioning pins 109, pressure plates 110 and base plates 111.

[0059] The lower end of the mandrel 108 engages with the center hole of the base plate 111. The mandrel 108 passes through the center hole of the self-adhesive sheet to be stacked along the axial direction to radially position the self-adhesive sheet.

[0060] Multiple positioning pins 109 are installed on the base plate 111 at intervals along the circumference of the spindle 108. The positioning part of the positioning pin 109 cooperates with the positioning groove of the self-adhesive sheet to perform circumferential positioning of the self-adhesive sheet.

[0061] The pressure plate 110 is located above the stacked self-adhesive sheet and is sleeved on the mandrel 108 and the plurality of positioning pins 109;

[0062] The lower ends of the multiple pull rods I 103 are respectively connected to the base plate 111, and the upper ends pass through the pressure plate 110. The washers 101 and hexagonal nuts 102 are sequentially installed on the upper ends of the corresponding pull rods I 103 to restrict the pressure plate 110 from moving upward relative to the base plate 111.

[0063] The pressure sleeve 107 is sleeved on the upper part of the mandrel 108 and abuts against the upper end face of the pressure plate 110;

[0064] The pressure spring 104 is housed in the pressure sleeve 107 and sleeved on the rod portion of the pull rod II 106. The pressure ring 105 is located above the pressure spring 104 and sleeved on the rod portion of the pull rod II 106.

[0065] The rod portion of the pull rod II 106 passes through the center holes of the pressure ring 105, the pressure spring 104 and the pressure sleeve 107 in sequence and is threaded to the top end of the spindle 108. The limiting part of the pull rod II 106 presses against the pressure ring 105, so that the pressure spring 104 is in a compressed state.

[0066] The elastic force of the pressure spring 104 is transmitted to the pressure plate 110 through the pressure sleeve 107 to keep the stacked self-adhesive sheets in an axially compressed state during the heating and curing of the self-adhesive coating.

[0067] The lower end of the pull rod I103 is threaded to the base plate 111; there are four pull rods I103, which are evenly spaced along the circumference of the spindle 108.

[0068] The upper end of the pressure sleeve 107 is provided with a pressure-bearing surface for external press to apply pressure; when the pressure plate 110 is pressed to the overlapping position, the hexagonal nut 102 can be tightened along the pull rod I 103 onto the washer 101 to lock the axial relative position between the pressure plate 110 and the base plate 111.

[0069] The inner hole of the pressure sleeve 107 is provided with a stepped surface, and the lower end of the pressure spring 104 is supported on the stepped surface;

[0070] The upper end of the pressure spring 104 is held by the pressure ring 105, and the pre-compression of the pressure spring 104 can be adjusted by adjusting the depth of the pull rod II 106 screwed into the spindle 108.

[0071] The number and distribution of the positioning pins 109 correspond to the positioning slots of the self-adhesive sheets to be stacked.

[0072] The base plate 111 is provided with a center hole that mates with the spindle 108 and a mounting hole that mates with the positioning pin 109.

[0073] The pressure plate 110 is provided with a center hole that mates with the spindle 108, a through hole that mates with the positioning pin 109, and a through hole that mates with the pull rod I 103.

[0074] The stiffness, free height, allowable compression, and allowable operating temperature of the pressure spring 104 are selected based on the required axial clamping force of the laminated sheets, the expected change in thickness, and the curing temperature of the self-adhesive coating. The initial compression is set by adjusting the screw-in depth of the pull rod II 106, and the compression of the pressure spring 104 is kept within the allowable operating stroke during heating, heat preservation, and cooling. The lamination pressure, curing temperature, and curing time are determined according to the process requirements of the self-adhesive sheets and their coatings used.

[0075] Example 9:

[0076] This embodiment discloses a self-adhesive stator core stacking fixture, which is composed of four washers 101, four hexagonal nuts 102, four pull rods I 103, one pressure spring 104, one pressure ring 105, one pull rod II 106, one pressure sleeve 107, one mandrel 108, eight positioning pins 109, one pressure plate 110, and one base plate 111.

[0077] like Figure 1As shown, first place the base plate 111 on the mandrel 108 and insert eight positioning pins 109 into the base plate 111; then place the arranged self-adhesive sheet, install the pressure plate 110, install four tie rods I 103, install four washers 101, and install four hexagonal nuts 102 to tighten; then place it in the hydraulic press, install the pressure sleeve 107 to press it, and then tighten the hexagonal nuts 102; first install the pressure spring 104 into the pressure sleeve 107, then install the pressure ring 105 onto the pressure sleeve 107, and finally screw the tie rod II 106 into the mandrel 108; after assembly, place it in an oven for heating, and then cool it to bond the self-adhesive sheet into a whole to form the stator core.

[0078] The self-adhesive stator core stacking fixture is assembled from eleven parts, requiring materials with sufficient strength and rigidity. First: Tie rod I 103 and pressure sleeve 107 are machined using tempering, turning, milling, and fitting; pressure ring 105 is machined using tempering and turning; tie rod II 106 is machined using tempering, turning, and fitting; mandrel 108 and positioning pin 109 are machined using turning, quenching, and grinding; pressure plate 110 is machined using tempering, turning, surface grinding, fitting, wire cutting, and fitting; base plate 111 is machined using tempering, turning, surface grinding, fitting, wire cutting, milling, and fitting; next, standard washers 101 and hexagonal nuts 102 are selected, and a purchased pressure spring 104 is selected; finally, according to... Figure 1 assembly.

Claims

1. A self-adhesive sheet stator core lamination press tool characterized by: Includes multiple pull rods I (103), pressure springs (104), pressure rings (105), pull rods II (106), pressure sleeves (107), spindles (108), multiple positioning pins (109), pressure plates (110), and base plates (111); The lower end of the mandrel (108) is supported on the base plate (111); Multiple positioning pins (109) are distributed circumferentially and inserted into the base plate (111) for radial and circumferential positioning of the self-adhesive sheets to be stacked; The pressure plate (110) is sleeved on the mandrel (108) and the positioning pin (109) for pressing the stacked self-adhesive sheets; Multiple tie rods I (103) are connected at their lower ends to the base plate (111) and at their upper ends to pass through the pressure plate (110). The pressure sleeve (107) is sleeved on the mandrel (108) and pressed against the upper end face of the pressure plate (110); The pressure spring (104) is housed within the pressure sleeve (107); The pressure ring (105) is sleeved on the mandrel (108) and pressed against the upper end of the pressure spring (104); The pull rod II (106) is screwed into the top of the mandrel (108) and applies pre-pressure to the pressure spring (104) through the pressure ring (105). The elastic force of the pressure spring (104) is transmitted to the pressure plate (110) through the pressure sleeve (107), thereby bonding the self-adhesive sheet into a whole.

2. The self-adhesive lamination tooling for a stator core stack according to claim 1, characterized by, The lower end of the pull rod I (103) is threaded to the base plate (111), and the upper end passes through the pressure plate (110) and engages with the washer (101) and the hexagonal nut (102).

3. The self-adhesive lamination tooling for a stator core stack according to claim 2, characterized by, After the hydraulic press compresses the stacked plates to the preset pressure through the pressure sleeve (107), the hexagonal nut (102) is locked to maintain the stacked state.

4. The self-adhesive lamination tooling for a stator core stack according to claim 1, wherein The pressure spring (104) is sleeved on the outside of the rod portion of the pull rod II (106); The lower end of the pressure spring (104) is supported on the inner hole step surface of the pressure sleeve (107), and the upper end is held by the pressure ring (105).

5. The self-adhesive lamination fixture for a stator core stack according to claim 1, characterized by, The number and distribution of the positioning pins (109) correspond to the positioning slots or outer circle positioning features of the self-adhesive sheet to be stacked.

6. The self-adhesive lamination fixture for a stator core stack according to claim 1, characterized by, The base plate (111) is provided with a center hole that mates with the spindle (108) and a mounting hole that mates with the positioning pin (109).

7. The self-adhesive lamination tooling fixture of claim 1, wherein, The pressure plate (110) is provided with a center hole that mates with the spindle (108), a through hole that mates with the positioning pin (109), and a through hole that mates with the pull rod I (103).

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