A vacuum dipping equipment and a vacuum dipping method

Abstract

The present invention discloses a vacuum paint dripping device, which includes a vacuum chamber with a vacuum inner cavity therein; a paint dripping and rotating device located in the vacuum inner cavity; the paint dripping and rotating device includes a product clamping mechanism, a rotation driving unit for driving the product clamping mechanism to rotate, and a swing driving unit for driving the product clamping mechanism to swing; a paint dripping needle head adjusting device, which includes a paint dripping rack, a paint dripping head, and a multi-axis displacement mechanism for driving the displacement of the paint dripping head, the paint dripping head is located in the vacuum inner cavity, and the driving mechanism of the multi-axis displacement mechanism is located outside the vacuum chamber. Thus, through the settings of the vacuum chamber, the paint dripping and rotating device, and the paint dripping needle head adjusting device, it is realized to clamp the product in a vacuum environment and cooperate with rotation and swing actions as needed, and the paint dripping head can be displaced in multiple axes to drip paint on the product, which is beneficial to improving the paint dripping penetration effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dipping equipment, and in particular to a vacuum dipping equipment and a vacuum dipping method. Background Art

[0002] As the core component of an electric motor, the quality of the stator of the motor determines the working performance and service life of the motor. When producing the stator, insulating paint needs to be filled into the internal voids of the stator to keep the insulation between the internal windings of the stator and between the windings and the slot walls, improving the electrical performance and mechanical strength of the stator. Currently, there are two common methods: dipping and dropping.

[0003] CN 202094773 U discloses a new type of dropping machine, which includes a box body and an electric control box. A paint tank and an exhaust pipe are provided on the box body, and an exhaust fan is provided inside the exhaust pipe; a vacuum dropping control device and a rotating tooling support are provided inside the box body. The rotating shaft of the rotating tooling support is connected to the motor, and the paint tank is communicated with the vacuum dropping control device through a dropping pipe; the electric control box is connected to the motor and the vacuum dropping control device through wires. For this dropping machine solution, it is relatively difficult to implement during implementation, and the controllability is not ideal. It is difficult to control the vacuum degree using the exhaust fan. Moreover, the vacuum dropping control device and the rotating tooling support limit the placement angle and dropping position of the product, with poor flexibility and limited dropping effect.

[0004] In addition, although a multi-axis mobile dropping device is generally used for automatic dropping at present, for example, CN216356401U discloses a dropping device for an electric motor stator, which includes a platform. A general frame is fixedly installed at the upper left end of the platform, an electric control cabinet is provided at the left end of the general frame, a gel furnace is provided at the upper right end of the platform, a rotating tensioning mechanism is installed in the middle of the general frame, a rotating bracket is provided on the rotating tensioning mechanism and is connected to the general frame through inclined supports on both sides, and a mobile dropping mechanism is fixedly installed at the uppermost end of the general frame. The mobile dropping mechanism is a three-axis mechanism, and a dropping gun is fixedly installed at the head below the Z-axis slide. Its three-axis mechanism uses a servo motor to control the three-axis movement to accurately control the movement position. However, if considering dropping paint in a vacuum environment, the three-axis mechanism is inconvenient for heat dissipation in the vacuum chamber and is also inconvenient for maintenance and repair.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0006] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present invention is to provide a vacuum dropping equipment and a vacuum dropping method. Through the settings of a vacuum chamber, a dropping rotation device, and a dropping needle adjustment device, it realizes clamping the product in a vacuum environment and rotating and swinging as needed. The dropping head can be displaced in multiple axes to drop paint on the product, which is beneficial to improving the dropping penetration effect.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A vacuum dipping equipment, comprising

[0009] A vacuum cavity, which has a vacuum inner cavity inside;

[0010] A dipping and rotating device, which is located in the vacuum inner cavity; the dipping and rotating device includes a product clamping mechanism, a rotation driving unit for driving the product clamping mechanism to rotate, and a swing driving unit for driving the product clamping mechanism to swing;

[0011] A dipping needle adjusting device, which includes a dipping rack, a dipping head, and a multi-axis displacement mechanism for driving the displacement of the dipping head. The dipping head is located in the vacuum inner cavity, and the driving mechanism of the multi-axis displacement mechanism is located outside the vacuum cavity.

[0012] As a preferred solution, an IH heating device is further provided in the vacuum inner cavity, and the IH heating device includes an electromagnetic induction coil.

[0013] As a preferred solution, the electromagnetic induction coil is further connected to a heating driving unit, and the heating driving unit drives the displacement of the electromagnetic induction coil. The heating driving unit includes a first X-axis lead screw, a first X-axis sliding part that can be displaced along the X-axis under the linkage of the first X-axis lead screw, and a first X-axis driving mechanism for driving the rotation of the first X-axis lead screw. The electromagnetic induction coil is connected to the first X-axis sliding part. Both the first X-axis lead screw and the first X-axis sliding part are located in the vacuum inner cavity, and the first X-axis driving mechanism is located outside the vacuum cavity.

[0014] As a preferred solution, a first sealing seat is provided between the first X-axis driving mechanism and the outside of the vacuum cavity; and / or: a first universal coupling is connected between the first X-axis driving mechanism and the first X-axis lead screw.

[0015] As a preferred solution, the multi-axis displacement mechanism includes a second X-axis module, a Z-axis module, a second X-axis driving mechanism, a Z-axis driving mechanism, and a telescopic universal coupling; the second X-axis module is installed on the paint dripping rack, and the second X-axis module includes a second X-axis lead screw and a second X-axis sliding part that can be driven by the second X-axis lead screw to displace along the X-axis, and the second X-axis driving mechanism is connected to the second X-axis lead screw to drive the second X-axis lead screw to rotate; the Z-axis module is connected to the second X-axis sliding part, the Z-axis module includes a Z-axis lead screw and a Z-axis sliding part that can be driven by the Z-axis lead screw to displace along the Z-axis, the paint dripping head is connected to the Z-axis sliding part, the lower end of the telescopic universal coupling is connected to the upper end of the Z-axis lead screw, and the upper end of the telescopic universal coupling is connected to the Z-axis driving mechanism, and the Z-axis driving mechanism drives the telescopic universal coupling to rotate around the Z-axis to synchronously drive the Z-axis lead screw to rotate. Through the ingenious design of the structure of the multi-axis displacement mechanism, the X-axis driving mechanism and the Z-axis driving mechanism can be placed outside, which is convenient for the setting of the vacuum cavity. At the same time, the operation, regulation, maintenance and repair of the X-axis driving mechanism and the Z-axis driving mechanism are more convenient. When the X-axis driving mechanism and the Z-axis driving mechanism adopt motors, the problem of inconvenient heat dissipation of the motors in the vacuum cavity is also avoided.

[0016] As a preferred solution, a second universal coupling is further connected between the second X-axis driving mechanism and the second X-axis lead screw.

[0017] As a preferred solution, the paint dripping and rotating device further includes a rotating inner frame and a swinging outer frame, the product clamping mechanism is arranged on the rotating inner frame, the rotation driving unit controls the rotating inner frame to be rotatable relative to the swinging outer frame, and the swinging driving unit controls the swinging outer frame to swing back and forth.

[0018] As a preferred solution, the product clamping mechanism includes a movable clamping part and a fixed clamping part, a first reset elastic part is arranged between the movable clamping part and the rotating inner frame, and the reset elastic force of the first reset elastic part acts on the movable clamping part, so that the movable clamping part has a tendency to displace towards the fixed clamping part; a clamping and loosening mechanism is arranged for the movable clamping part, and the clamping and loosening mechanism drives the movable clamping part to displace away from the fixed clamping part to switch to the loosening state.

[0019] As a preferred solution, a self-locking mechanism and a self-locking opening mechanism are further provided on the rotating inner frame. The movable clamping member has a locked portion. The self-locking mechanism acts on the locked portion to lock the current position of the movable clamping member in the clamped state. The self-locking opening mechanism controls the self-locking mechanism to release the action on the locked portion. The self-locking mechanism is used to lock the current position of the movable clamping member in the clamped state, preventing sudden failure of the elastic member during use and accidents. Moreover, the self-locking mechanism locks the current position of the movable clamping member in the clamped state, ensuring that the state where the product is jointly clamped by the fixed clamping member and the movable clamping member remains accurate and ideal, which is beneficial to ensuring the rotation position accuracy of the product and better ensuring the dipping quality.

[0020] A vacuum dipping method, based on the vacuum dipping device described in any one of the preceding items, includes the following steps:

[0021] First, open the openable door of the vacuum chamber, place the product into the dipping and rotating device, and the product is clamped and fixed by the product clamping mechanism; then close the openable door, and the vacuum pump evacuates the vacuum chamber.

[0022] In a vacuum environment, the electromagnetic induction coil extends forward into the product to heat the product for a period of time. Then, cooling water flows into the hollow metal tube of the electromagnetic induction coil to cool the product to a set temperature. Then, the rotation drive unit drives the product to rotate around its own axis, and at the same time, the swing drive unit drives the product to swing to different inclination angles, and the dipping head faces the product for dipping. After dipping is completed, stop dipping and perform the step of hanging paint for a period of time. Then, the electromagnetic induction coil extends forward into the product again to heat the product to cure the insulating paint.

[0023] Finally, open the openable door of the vacuum chamber again and take out the product.

[0024] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it mainly realizes clamping the product in a vacuum environment and cooperating with rotation and swing actions as needed through the settings of the vacuum chamber, the dipping and rotating device, and the dipping needle head adjustment device. The dipping head can be displaced in multiple axes to dip the product, which is beneficial to improving the dipping penetration effect. In addition, for the vacuum dipping method, the dipping effect is good, the degree of automation is high, it is suitable for full automation, reduces the turnover between processes, and is beneficial to improving the dipping efficiency.

[0025] To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments. Description of the Drawings

[0026] Figure 1 It is a three-dimensional view of the vacuum dipping device according to the embodiment of the present invention;

[0027] Figure 2 It is a cross-sectional view of the vacuum dipping equipment according to an embodiment of the present invention;

[0028] Figure 3 It is a connection diagram of the IH heating device and the water cooling device according to an embodiment of the present invention;

[0029] Figure 4 It is a three-dimensional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0030] Figure 5 It is another three-dimensional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0031] Figure 6 It is the first cross-sectional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0032] Figure 7 It is the second cross-sectional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0033] Figure 8 It is the third cross-sectional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0034] Figure 9 It is a partial structure view of the paint dripping and rotating device according to an embodiment of the present invention;

[0035] Figure 10 It is the fourth cross-sectional view of the paint dripping and rotating device according to an embodiment of the present invention;

[0036] Figure 11 It is a force analysis view when the self-locking mechanism of the paint dripping and rotating device according to an embodiment of the present invention needs to be opened;

[0037] Figure 12 It is the front view of another embodiment of the paint dripping and rotating device of the present invention;

[0038] Figure 13 It is a three-dimensional view of the first embodiment of the paint dripping needle adjusting device of the present invention;

[0039] Figure 14 It is an application view of the first embodiment of the paint dripping needle adjusting device of the present invention;

[0040] Figure 15 It is an application view of the second embodiment of the paint dripping needle adjusting device of the present invention.

[0041] Description of the attached drawing signs: Rotating inner frame 1, rotating drive unit 2, swinging outer frame 4, swinging drive unit 5, clamping mechanism 6, clamping and releasing mechanism 7, second servo motor 8, gear 9, tooth ring part 10, rotating shaft part 11, side frame 12, first servo motor 13, universal coupling 14, sealing seat 15, speed reducer 16, fixed clamping part 17, movable clamping part 18, first reset elastic part 19, connecting through groove 20, connecting part 21, self-locking mechanism 22, self-locking opening mechanism 23, locking groove 24, locking part 25, second reset elastic part 26, first inclined surface 27, claw 28, stop part 29, temperature sensor 30, paint dripping rack 31, paint dripping head 32, X-axis module 33, Z-axis module 34, telescopic universal coupling 35, adjusting handwheel 36, upper end cross universal coupling 37, telescopic cylinder 38, lower end cross universal coupling 39, vacuum cavity 310, housing 311, sealing seat 312, motor 313, second universal coupling 314, vacuum pump 315, IH heating device 100, electromagnetic induction coil 101, energized hose 102, heating drive unit 103, first X-axis sliding part 104, first X-axis drive mechanism 105, first extension pipe 106, second extension pipe 107, paint dripping rotation device 200, paint dripping needle adjusting device 300, cold water device 400, electric control device 500, front vacuum inner cavity A, rear vacuum inner cavity B. Detailed implementation manners

[0042] Please refer to Figures 1 to 15 as shown, which shows the specific structure of the embodiment of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0044] A vacuum paint dripping device includes a vacuum cavity 310, an IH heating device 100, a paint dripping rotation device 200 and a paint dripping needle adjusting device 300. The vacuum cavity 310, the IH heating device 100, the paint dripping rotation device 200 and the paint dripping needle adjusting device 300 are respectively connected to an electric control device 500 to achieve intelligent control of the system.

[0045] The vacuum chamber 310 is generally cube-shaped, but can also be flexibly designed into other shapes as long as it has a vacuum inner cavity. An openable door is provided on its outer side for easy access to products, and a transparent observation window can also be provided; a vacuum pump 315 is provided outside the vacuum chamber 310, and the vacuum pump 315 evacuates the vacuum inner cavity; in this embodiment, the vacuum inner cavity can be divided into a front vacuum inner cavity A and a rear vacuum inner cavity B, and the front vacuum inner cavity A and the rear vacuum inner cavity B are arranged front and back and communicate with each other.

[0046] The IH heating device 100 is arranged in the vacuum inner cavity, and the IH heating device 100 includes an electromagnetic induction coil 101. The electrical connection wire of the electromagnetic induction coil 101 is an energized hose 102, which is convenient for cooperating with the movement requirement, that is, it is convenient for the electromagnetic induction coil 101 to move forward into the interior of the product clamped by the paint dripping and rotating device 200. After the heating and cooling processes are completed, it can be reset backward. The stator includes silicon steel sheets and copper wire windings. When the electromagnetic induction coil works, the alternating current flowing through the electromagnetic induction coil generates an alternating magnetic field passing through the stator, causing the stator to generate eddy currents for heating. The axial direction of the electromagnetic induction coil 101 is horizontally arranged, which is equivalent to being arranged horizontally in the vacuum inner cavity, and the axial direction of the stator is also the horizontal direction, that is, both are in the X-axis direction. The electromagnetic induction coil 101 is also connected to a heating drive unit 103, and the heating drive unit 103 drives the electromagnetic induction coil 101 to displace along the axial direction of the product. The heating drive unit 103 includes a first X-axis lead screw, a first X-axis sliding part 104 that can be displaced along the X-axis under the linkage of the first X-axis lead screw, and a first X-axis drive mechanism 105 that drives the first X-axis lead screw to rotate. The first X-axis lead screw and the first X-axis sliding part form a first X-axis module. The electromagnetic induction coil 101 is connected to the first X-axis sliding part 104. The first X-axis lead screw and the first X-axis sliding part are both located in the vacuum inner cavity, and the first X-axis drive mechanism 105 is located outside the vacuum chamber. A first sealing seat is provided between the first X-axis drive mechanism and the outside of the vacuum chamber; and / or: a first universal coupling is connected between the first X-axis drive mechanism and the first X-axis lead screw. The first X-axis drive mechanism is an adjustment handwheel or a motor. In this embodiment, it is a servo motor. The output end of the servo motor is connected to a coaxial transfer shaft through a coupling. The coaxial transfer shaft passes through the sealing seat 15 and the bearing. A Y-shaped sealing ring is provided between the sealing seat 15 and the coaxial transfer shaft, and an O-shaped sealing ring is provided between the sealing seat and the bearing. One end of the first universal coupling is connected to the coaxial transfer shaft, and the other end is connected to the first X-axis lead screw. In addition, a cold water device is provided outside the vacuum chamber. The electromagnetic induction coil is in the shape of a hollow metal tube wound in a spiral, and the cold water device supplies cold water to flow through the inside of the hollow metal tube of the electromagnetic induction coil. As Figure 3As shown, one end of the electromagnetic induction coil 101 is connected to the cold water device 400 (also referred to as the water cooling device) through the first extension pipe 106, and the other end of the electromagnetic induction coil 101 is connected to the cold water device 400 (also referred to as the water cooling device) through the second extension pipe 107. In this way, a loop is formed. As shown by the arrow indication direction, the cold water flowing out of the cold water device 400 flows along the inside of the electromagnetic induction coil 101 through the first extension pipe 106. At this time, the electromagnetic induction coil 101 acts as a metal heat conductor, which conducts the heat of the product to the cold water inside. The temperature of the cold water rises. At the other end of the electromagnetic induction coil 101, the heated water flows back to the cold water device 400 through the second extension pipe 107. After being cooled in the cold water device 400, it circulates again through the first extension pipe 106 and enters the electromagnetic induction coil 101. In this way, a loop is formed for continuous cyclic cooling and temperature reduction. The hollow metal pipe is usually a hollow seamless copper pipe. The circulating water flow inside the hollow copper pipe is in full contact with the cooling water, which can effectively improve the cooling efficiency. The whole device is simple and easy to operate, and has a high cooling efficiency.

[0047] The paint dripping and rotating device 200 is located in the vacuum inner cavity, specifically in the front vacuum inner cavity A; the paint dripping and rotating device includes a product clamping mechanism, a rotation driving unit for driving the product clamping mechanism to rotate, and a swing driving unit for driving the product clamping mechanism to swing; the paint dripping and rotating device also includes a rotating inner frame and a swinging outer frame. The product clamping mechanism is arranged on the rotating inner frame. The rotation driving unit controls the rotating inner frame to be rotatable relative to the swinging outer frame, and the swing driving unit controls the swinging outer frame to swing back and forth. The product clamping mechanism includes a movable clamping member and a fixed clamping member. A first reset elastic member is arranged between the movable clamping member and the rotating inner frame. The reset elastic force of the first reset elastic member acts on the movable clamping member, so that the movable clamping member has a tendency to displace towards the fixed clamping member; a clamping and loosening mechanism is arranged for the movable clamping member, and the clamping and loosening mechanism drives the movable clamping member to displace away from the fixed clamping member to switch to the loosening state. A self-locking mechanism and a self-locking opening mechanism are also arranged on the rotating inner frame. The movable clamping member has a locked part, and the self-locking mechanism acts on the locked part to lock the current position of the movable clamping member in the clamped state, and the self-locking opening mechanism controls the self-locking mechanism to release the action on the locked part. Specifically:

[0048] The paint dripping and rotating device 200 includes a rotating inner frame 1, a rotation driving unit 2, a swinging outer frame 4, a swing driving unit 5, a clamping mechanism 6, and a clamping and loosening mechanism 7.

[0049] The rotating inner frame 1 is arranged inside the swinging outer frame 4, and the rotating inner frame 1 is rotatable relative to the swinging outer frame 4 so as to Figure 1With the defined direction as a reference, the rotating inner frame 1 can rotate around a horizontal axis in the front-rear direction within a vertical plane.

[0050] The rotation driving unit 2 includes a servo motor (defined as the second servo motor 8 in this text). The second servo motor 8 can be a vacuum servo motor. The output end of the second servo motor 8 is connected with a gear 9. The outer periphery of the rotating inner frame 1 has a toothed ring portion 10. The gear 9 is in meshing transmission connection with the toothed ring portion 10 to directly drive the toothed ring portion 10 by the gear 9, so that the rotating inner frame 1 rotates. Directly driving the toothed ring portion 10 by the gear 9 makes the transmission more accurate and reliable, and occupies less space.

[0051] Rotating shaft portions 11 are arranged on the left and right outer sides of the swinging outer frame 4. The rotating shaft portions 11 are supported on the side frames 12 on both sides. A temperature sensor 30 is arranged at the rear side of the swinging outer frame.

[0052] The swinging driving unit 5 controls the swinging outer frame 4 to swing back and forth around a horizontal axis in the left-right direction. The swinging driving unit 5 includes a first servo motor 13. The output end of the first servo motor 13 is connected to a rotating shaft portion 11 on one side through a universal coupling 14 to drive the swinging outer frame 4 to rotate and swing around the rotating shaft portion 11. Driving the rotating shaft portion 11 to rotate by the first servo motor 13, combined with the setting of the universal coupling 14, enables more accurate control of the rotation angle of the swinging outer frame 4. Moreover, it does not need to occupy the tabletop of the machine, occupies less space, makes the whole device more compact, and is beneficial to the storage and management of workshop equipment. The universal coupling 14 is a cross universal coupling 14, which has a first swinging shaft extending in the up-down direction and a second swinging shaft extending in the front-rear direction. The output axis direction of the first servo motor 13 and the axis direction of the rotating shaft portion 11 are both arranged to extend in the left-right direction. And, the outer end of the cross universal coupling 14 is connected with a sealing seat 15. Using the sealing seat 15 to form a sealed connection with the vacuum housing, the first servo motor 13 is connected with a speed reducer 16 and then connected to the sealing seat 15. It is equivalent that the power output end of the speed reducer 16 is arranged through the sealing seat 15, with good sealing performance and convenient and reliable installation and positioning.

[0053] The clamping mechanism 6 is arranged on the rotating inner frame 1. The clamping mechanism 6 includes a fixed clamping member 17 and a movable clamping member 18. A product placement space is formed between the movable clamping member 18 and the fixed clamping member 17. Usually, the movable clamping member 18 is arranged above, and the fixed clamping member 17 is arranged below the movable clamping member 18. The fixed clamping member 17 can be one, that is, the movable clamping member 18 and the fixed clamping member 17 are arranged vertically opposite, as Figure 13 shown. The fixed clamping member 17 can also be arranged in two, and the two fixed clamping members 17 are arranged left and right to be arranged in a triangular positional relationship with the movable clamping member 18.

[0054] The clamping and releasing mechanism 7 drives the movable clamping member 18 to displace away from the fixed clamping member 17 (also referring to reciprocating radial displacement in this embodiment) to switch to the release state; the rotation driving unit 2 controls the rotation of the rotating inner frame 1 relative to the swinging outer frame 4 about a horizontal axis in the front-rear direction. A first reset elastic member 19 is provided between the movable clamping member 18 and the rotating inner frame 1. The first reset elastic member 19 can be a compression spring extending in the front-rear direction. The reset elastic force of the first reset elastic member 19 acts on the movable clamping member 18, causing the movable clamping member 18 to have a tendency to displace towards the fixed clamping member 17 to clamp the product.

[0055] The clamping and releasing mechanism 7 is provided on the swinging outer frame 4, such as the top of the swinging outer frame 4, and it can use a cylinder as the power source. The clamping and releasing mechanism 7 has a connecting through groove 20 (such as a T-shaped groove) that penetrates along the circumferential direction of the rotation of the rotating inner frame 1. The upper end of the movable clamping member 18 has a connecting portion 21 (such as a T-shaped connecting portion). After the connecting portion 21 rotates and extends into the connecting through groove 20, it can form a connection with the inner wall surface of the connecting through groove 20, so as to facilitate the clamping and releasing mechanism 7 to pull the movable clamping member 18 upward. In comparison, the cooperation of the T-shaped groove and the T-shaped connecting portion (or the L-shaped groove and the L-shaped connecting portion) realizes the connection and positioning relationship between the two from the component structure. The structure is simple and easy to produce. If there are no limitations on the specific shapes of the accessory structures, an electromagnet form can also be used. When the connecting portion 21 rotates and extends into the connecting through groove 20, the electromagnetic member has a magnetic attraction force to hold the connecting portion 21 to achieve connection and positioning, and when it needs to rotate and extend out, the power is cut off and there is no magnetic attraction force.

[0056] A self-locking mechanism 22 and a self-locking release mechanism 23 are also provided on the rotating inner frame 1;

[0057] The movable clamping member 18 has a locked portion. For example, the locked portion is a locking groove 24 formed on the movable clamping member 18. The locking groove 24 extends in the front-rear direction. The self-locking mechanism 22 acts on the locked portion to lock the current position of the movable clamping member 18 in the clamped state. The self-locking release mechanism 23 controls the self-locking mechanism 22 to release the action on the locked portion, so that the movable clamping member 18 can be driven by the clamping and releasing mechanism 7 to switch to the release state. When the rotating inner frame 1 rotates, the clamping mechanism 6, the product to be clamped, the self-locking mechanism 22, and the self-locking release mechanism 23 rotate together with the rotating inner frame 1.

[0058] The locking groove 24 locking groove 24 said self-locking mechanism 22 includes a locking piece 25 and a second resetting elastic piece 26, the second resetting elastic piece 26 can be a pressure spring extending up and down, the locking piece 25 can be arranged to move forward and backward relative to the movable clamping piece 18, the second resetting elastic piece 26 is arranged between the movable clamping piece 18 and the locking piece 25, the resetting elastic force of the second resetting elastic piece 26 acts on the locking piece 25, so that the locking piece 25 has the tendency to move toward the locking groove 24 to extend into the locking groove 24. The structure of this kind of self-locking mechanism 22 is simple and ingenious, and it is easy to implement. The self-locking opening mechanism 23 pulls and controls the locking piece 25 to overcome the resetting elastic force of the second resetting elastic piece 26 and displace it from the locking groove 24.

[0059] like Figure 11 As shown, the inner bottom surface of the locking groove 24 is a first inclined surface 27 which is gradually lowered along the disengagement direction of the locking member 25. Correspondingly, the bottom surface of the locking member 25 is a second inclined surface adapted to the first inclined surface 27. The inclination angles of the two are the same or very close. The inclination angle θ of the first inclined surface 27 is 3 to 10 degrees, for example, 4 degrees. Then, the force F1 required for the self-locking opening mechanism 23 to pull and control the displacement of the locking member 25 is F0×sinθ+F0×μ, wherein F0=product gravity+centrifugal force=Mg+M×V 2 / R, M represents the mass of the product, g represents the acceleration of gravity, V represents the rotation speed of the product (also refers to the rotation speed of the rotating inner frame 1), R represents the rotation radius, and μ represents the friction coefficient.

[0060] The self-locking opening mechanism 23 is a first cylinder, which is driven and connected with a hook 28. The outer end of the locking member 25 is provided with a stopper 29. The hook 28 is hooked on the stopper 29 to pull the locking member 25 outward so that the locking member 25 is separated from the locking groove 24. When locking is required, the first cylinder first drives the hook 28 to reset inward to keep a distance with the stopper 29. Then, the locking member 25 is displaced inward and extends into the locking groove 24 under the reset action of the first reset elastic member 19, and the distance between the stopper 29 and the hook 28 becomes smaller or the hook 28 contacts the stopper 29. By utilizing the telescopic action of the hook 28 of the first cylinder, the two states of unlocking and avoiding inward for automatic locking of the self-locking mechanism 22 are switched. The structure is simple and easy to control, so that the setting of the self-locking mechanism 22 and the self-locking opening mechanism 23 does not need to increase too much cost, which is convenient for popularization and application.

[0061] In the product locking state, the locking member 25 extends into the locking groove 24. The current position of the locking movable clamping member 18 in the clamping state ensures that during rotation, the relative positions of the movable clamping member 18 and the product are stable. When the movable clamping member 18 rotates to extend into the locking groove 24, if it is necessary to prepare for loosening the product, first, the claw 28 of the self-locking opening mechanism 23 pulls the locking member 25 outwards to disengage the locking member 25 from the locking groove 24. Then, the clamping and loosening mechanism 7 pulls the movable clamping member 18 upwards to loosen the product. At this time, the product can be taken out.

[0062] The paint dripping needle head adjusting device 300 includes a paint dripping rack 31, a paint dripping head 32, and a multi-axis displacement mechanism for driving the displacement of the paint dripping head 32. The paint dripping head is located in the vacuum inner cavity, specifically in the front vacuum inner cavity A. The paint dripping rack 31 can adopt a vertical rack, which has a simple structure and occupies a small space. The multi-axis displacement mechanism includes a second X-axis module 33, a Z-axis module 34, a second X-axis driving mechanism, a Z-axis driving mechanism, and a telescopic universal coupling 35. The second X-axis module 33 is installed on the paint dripping rack 31. The second X-axis module 33 includes a second X-axis lead screw and a second X-axis sliding part that can be driven by the second X-axis lead screw to displace along the second X-axis. The second X-axis driving mechanism is connected to the second X-axis lead screw to drive the second X-axis lead screw to rotate. The second X-axis module 33 further includes an X-direction guide rail, and the second X-axis sliding part also has an X-direction guide rail adaptation part, which is slidably arranged along the X-direction guide rail. In this way, the smoothness and reliability of the second X-axis sliding part during displacement along the second X-axis can be improved. In the first embodiment, the second X-axis driving mechanism is an adjusting handwheel. Further, a second universal coupling 314 is also connected between the second X-axis driving mechanism and the second X-axis lead screw. It can adopt a cross universal coupling, which has better concentricity and operates more flexibly. The second X-axis driving mechanism extends into or passes through the corresponding seal seat to form a connection with the outer end of the universal coupling. The Z-axis module 34 is connected to the second X-axis sliding part, so that the entire Z-axis module 34 can displace along the second X-axis together with the second X-axis sliding part. The Z-axis module 34 includes a Z-axis lead screw and a Z-axis sliding part that can be driven by the Z-axis lead screw to displace along the Z-axis. The paint dripping head 32 is connected to the Z-axis sliding part. The lower end of the telescopic universal coupling 35 is connected to the upper end of the Z-axis lead screw, and the upper end of the telescopic universal coupling 35 is connected to the Z-axis driving mechanism. The Z-axis driving mechanism drives the telescopic universal coupling 35 to rotate around the Z-axis to synchronously drive the Z-axis lead screw to rotate. The Z-axis module 34 further includes a Z-direction guide rail, and the Z-axis sliding part also has a Z-direction guide rail adaptation part, which is slidably arranged along the Z-direction guide rail. In this way, the smoothness and reliability of the Z-axis sliding part during displacement along the second X-axis can be improved. In the first embodiment, the Z-axis driving mechanism is an adjusting handwheel 36. The telescopic universal coupling 35 includes an upper cross universal coupling 37, a telescopic cylinder 38, and a lower cross universal coupling 39. The upper cross universal coupling 37 and the lower cross universal coupling 39 are respectively connected to the upper and lower ends of the telescopic cylinder 38.

[0063] Such as Figure 14As shown, the paint dripping rack 31, the paint dripping head 32, the second X-axis module 33, the Z-axis module 34, and the telescopic universal coupling 35 are all located inside the vacuum chamber 310, and the second X-axis driving mechanism and the Z-axis driving mechanism are located outside the vacuum chamber 310. The outside of the vacuum chamber 310 is covered with a housing 311. A sealing seat 312 is provided between the second X-axis driving mechanism and / or the Z-axis driving mechanism and the housing 311. The Z-axis driving mechanism extends into or passes through the corresponding sealing seat 312 to form a connection with the upper end of the telescopic universal coupling 35. The second X-axis driving mechanism is located on the circumferential side of the housing 311, and the Z-axis driving mechanism is located on the top of the housing 311.

[0064] As Figure 15 shown, in the second embodiment, the second X-axis driving mechanism and the Z-axis driving mechanism are motors 313. Usually, both the second X-axis driving mechanism and the Z-axis driving mechanism are adjustment handwheels for a manual operation mode, or both the second X-axis driving mechanism and the Z-axis driving mechanism are motors for an automatic operation mode.

[0065] Next, a vacuum paint dripping method is introduced. Based on the above-mentioned vacuum paint dripping equipment, it includes the following steps:

[0066] First, open the opening and closing door body of the vacuum chamber. The clamping and releasing mechanism pulls upward to drive the movable clamping member to displace away from the fixed clamping member to switch to the release state. The manipulator extends into the vacuum inner cavity and places the product into the paint dripping and rotating device. The clamping and releasing mechanism resets downward so that the movable clamping member resets downward. At the same time, under the reset elastic force of the first reset elastic member, the movable clamping member and the fixed clamping member clamp the product. The self-locking mechanism acts on the locked part to lock the current position of the movable clamping member in the clamped state, and the product is clamped and fixed by the product clamping mechanism. Then the manipulator withdraws and closes the opening and closing door body, and the vacuum pump evacuates the vacuum chamber.

[0067] In a vacuum environment, the electromagnetic induction coil extends forward into the (stator) product to heat the product for a period of time. Then, cooling water flows into the hollow metal tube inside the electromagnetic induction coil to cool the product to a set temperature, such as room temperature. Then, the electromagnetic induction coil resets backward and withdraws from the product. The rotation driving unit drives the product to rotate around its own axis, and at the same time, the swing driving unit drives the product to swing to different tilt angles. The paint dripping head faces the product to drip paint. After the paint dripping is completed, the paint dripping stops, and the paint hanging step is carried out for a period of time. Then, the electromagnetic induction coil extends forward into the product again to heat the product to completely cure the insulating paint.

[0068] Finally, the self-locking opening mechanism controls the self-locking mechanism to release the action on the locked part, and the clamping and loosening mechanism pulls upward to drive the movable clamping member to displace away from the fixed clamping member, so as to switch to the loosening state, open the openable door of the vacuum chamber again, and the manipulator extends into the vacuum inner cavity again to take out the product.

[0069] The key design of the present invention lies in that mainly through the settings of the vacuum chamber, the paint dripping and rotating device, and the paint dripping needle adjusting device, it realizes clamping the product in a vacuum environment and cooperating with rotation and swinging actions as required. The paint dripping head can displace in multiple axes to drip paint on the product, which is beneficial to improving the paint dripping penetration effect. Moreover, the vacuum paint dripping method has good paint dripping effect, high automation degree, is suitable for full automation, reduces the turnover between processes, and is beneficial to improving the paint dripping efficiency.

[0070] The above are only the preferred embodiments of the present invention, and do not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A vacuum dipping equipment, characterized in that: including a vacuum chamber with a vacuum inner cavity inside; a paint dripping and rotating device located in the vacuum inner cavity, which includes a rotating inner frame, a swinging outer frame, a product clamping mechanism, a rotation driving unit for driving the product clamping mechanism to rotate, and a swinging driving unit for driving the product clamping mechanism to swing; the product clamping mechanism is arranged on the rotating inner frame, the rotation driving unit controls the rotating inner frame to be rotatable relative to the swinging outer frame, and the swinging driving unit controls the swinging outer frame to swing back and forth; the product clamping mechanism includes a movable clamping member and a fixed clamping member, and a first reset elastic member is arranged between the movable clamping member and the rotating inner frame, and the reset elastic force of the first reset elastic member acts on the movable clamping member, so that the movable clamping member has a tendency to displace towards the fixed clamping member; a clamping and loosening mechanism is arranged for the movable clamping member, and the clamping and loosening mechanism drives the movable clamping member to displace away from the fixed clamping member to switch to the loosening state; a self-locking mechanism and a self-locking opening mechanism are also arranged on the rotating inner frame, the movable clamping member has a locked part, the self-locking mechanism acts on the locked part to lock the current position of the movable clamping member in the clamping state, and the self-locking opening mechanism controls the self-locking mechanism to release the action on the locked part; a paint dripping needle adjusting device, which includes a paint dripping frame, a paint dripping head, and a multi-axis displacement mechanism for driving the paint dripping head to displace, the paint dripping head is located in the vacuum inner cavity, and the driving mechanism of the multi-axis displacement mechanism is located outside the vacuum chamber; the multi-axis displacement mechanism includes a second X-axis module, a Z-axis module, a second X-axis driving mechanism, a Z-axis driving mechanism, and a telescopic universal coupling; the second X-axis module is installed on the paint dripping frame, the second X-axis module includes a second X-axis lead screw and a second X-axis sliding part that can be driven by the second X-axis lead screw to displace along the X-axis, and the second X-axis driving mechanism is connected to the second X-axis lead screw to drive the second X-axis lead screw to rotate; the Z-axis module is connected to the second X-axis sliding part, the Z-axis module includes a Z-axis lead screw and a Z-axis sliding part that can be driven by the Z-axis lead screw to displace along the Z-axis, the paint dripping head is connected to the Z-axis sliding part, the lower end of the telescopic universal coupling is connected to the upper end of the Z-axis lead screw, and the upper end of the telescopic universal coupling is connected to the Z-axis driving mechanism, and the Z-axis driving mechanism drives the telescopic universal coupling to rotate around the Z-axis to synchronously drive the Z-axis lead screw to rotate.

2. A vacuum dipping paint device according to claim 1, characterized in that: An IH heating device is also arranged in the vacuum inner cavity, and the IH heating device includes an electromagnetic induction coil.

3. A vacuum dipping paint device according to claim 2, characterized in that: The electromagnetic induction coil is also connected with a heating driving unit, and the heating driving unit drives the electromagnetic induction coil to displace. The heating driving unit includes a first X-axis lead screw, a first X-axis sliding part that can be driven by the first X-axis lead screw to displace along the X-axis, and a first X-axis driving mechanism for driving the first X-axis lead screw to rotate. The electromagnetic induction coil is connected to the first X-axis sliding part, the first X-axis lead screw and the first X-axis sliding part are both located in the vacuum inner cavity, and the first X-axis driving mechanism is located outside the vacuum chamber.

4. A vacuum dipping equipment according to claim 3, characterized in that: A first sealing seat is arranged between the first X-axis driving mechanism and the outside of the vacuum chamber; and / or: a first universal coupling is connected between the first X-axis driving mechanism and the first X-axis lead screw.

5. A vacuum dipping paint device according to claim 1, characterized in that: A second universal coupling is also connected between the second X-axis driving mechanism and the second X-axis lead screw.

6. A vacuum dipping method, characterized in that: Based on the vacuum dipping equipment described in any one of claims 1 to 5, it includes the following steps: First, open the opening and closing door of the vacuum chamber, place the product into the dipping and rotating device, and the product is clamped and fixed by the product clamping mechanism; then close the opening and closing door, and the vacuum pump evacuates the vacuum chamber. In a vacuum environment, the electromagnetic induction coil extends forward into the product to heat the product for a period of time, then cooling water flows into the hollow metal tube of the electromagnetic induction coil to cool the product to the set temperature. Then, the rotation drive unit drives the product to rotate around its own axis, and at the same time, the swing drive unit drives the product to swing to different tilt angles, and the paint dripping head drips paint towards the product. After the paint dripping is completed, stop the paint dripping and perform the paint hanging step for a period of time. Then, the electromagnetic induction coil extends forward into the product again to heat the product to cure the insulating paint. Finally, open the opening and closing door of the vacuum chamber again and take out the product.

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