A motor stator drip painting production line and a method for automatically sleeving

Abstract

The application discloses a motor stator drip paint automatic sleeve production line and a motor stator drip paint automatic sleeve method. The motor stator drip paint automatic sleeve production line is sequentially provided with a drip paint station, an automatic sleeve heat shrink tube station, a curing station and a powder coating station along a stator conveying direction. The drip paint station is configured to drip insulating paint on a stator winding. The automatic sleeve heat shrink tube station is configured with an automatic sleeve heat shrink tube device and is used for sleeving a heat shrink tube with a natural state on a stator outgoing end head, wherein the heat shrink tube has an inner diameter greater than a maximum radial dimension of the stator outgoing end head. The curing station is configured to high-temperature bake the stator after the drip paint, so as to solidify the insulating paint. The high-temperature baking simultaneously causes the heat shrink tube to shrink under the heat, so as to be fastened on the stator outgoing end head. The powder coating station is configured to coat insulating powder on a stator end portion and / or an outer wall. The application improves the automation degree, simplifies a process flow and reduces a cost under the premise of guaranteeing a sleeve success rate.

Description

Technical Field

[0001] This invention relates to the field of motor stator coating production line technology, and in particular to an automatic sleeve-type motor stator coating production line and automatic sleeve-type method. Background Technology

[0002] In a motor stator coating production line, there are usually a coating station, a curing station, a cooling station, a manual silicone tube fitting station, and a powder coating station, etc.

[0003] The process includes several steps: The dripping station applies insulating varnish into the gaps of the stator windings, expelling air and filling the gaps to reinforce the windings. The curing station uses high-temperature baking to cause the dripped liquid insulating varnish to undergo a chemical cross-linking reaction and harden completely, ensuring the insulation strength meets standards. The cooling station uses forced air cooling or natural cooling to bring the cured stator to room temperature, stopping the thermosetting reaction and stabilizing its dimensions. This also prevents burns to operators in subsequent stations and damage to the silicone tubing that will be installed later due to high temperatures.

[0004] At the manual silicone tube fitting station, the operator needs to utilize the elasticity of the silicone tube to forcefully fit it onto the stator lead-out end, where its inner diameter is slightly smaller than the maximum radial dimension of the stator lead-out end in its natural state. The powder coating station typically refers to applying epoxy powder or similar materials to coat the stator end and / or outer wall with an insulating powder layer.

[0005] The aforementioned motor stator coating production line still has some areas for improvement: First, the manual insertion of silicone tubes is inefficient, especially since the inner diameter of the silicone tube is smaller than the maximum radial dimension of the stator lead-out end, requiring manual force to force it in. This operation is time-consuming and labor-intensive, making this station one of the efficiency bottlenecks of the entire production line.

[0006] Secondly, the quality of manual silicone tube insertion is inconsistent. Different operators have different levels of skill and apply different amounts of force, which can easily lead to problems such as the silicone tube not being inserted properly, being crooked, or being damaged, thus affecting reliability.

[0007] To address the aforementioned issues, if an automatic sleeve is used, the silicone tube is elastic, and its inner diameter in its natural state is usually designed to be smaller than the maximum radial dimension of the stator lead-out end to ensure a tight fit after sleeve installation. However, during automatic sleeve installation, interference between the silicone tube and the stator lead-out end can easily lead to sleeve failure, resulting in poor equipment stability.

[0008] Therefore, it is necessary to research a new technical solution to address the above problems. Summary of the Invention

[0009] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide an automatic sleeved motor stator coating production line and an automatic sleeved method, which improves the degree of automation, simplifies the process flow, and reduces costs while ensuring the sleeved success rate.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: An automatic sleeve-type motor stator coating production line, wherein the following components are arranged sequentially along the stator conveying direction: The paint-drip station is configured to drip insulating varnish onto the stator windings. The automatic heat shrink tubing station is equipped with an automatic heat shrink tubing fitting device, which is used to fit heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state onto the stator lead-out end. The curing station is configured to bake the stator after the paint is applied at high temperature so that the insulating paint is cured. At the same time, the heat shrink tubing is heated and shrinks, thereby fastening it to the stator lead-out end. The powder coating station is configured to coat the stator ends and / or outer wall with insulating powder.

[0011] As a preferred embodiment, the automatic heat shrink tubing station is equipped with a detection mechanism, which is configured to detect whether the stator lead-out end is fitted with the heat shrink tubing; a manual installation platform is connected to one side of the output end of the automatic heat shrink tubing station, and is configured such that: when the detection mechanism detects a stator without heat shrink tubing, the stator is transported to the manual installation platform, where heat shrink tubing is manually applied, and then the stator returns to the conveyor line connecting the automatic heat shrink tubing station and the curing station.

[0012] As a preferred embodiment, the automatic heat shrink tubing station is also equipped with an alarm. The alarm is configured to: if N stators are continuously detected to be missing heat shrink tubing, the alarm will be activated to issue an alarm, and the automatic heat shrink tubing equipment will be stopped by the control system, where N is a natural number greater than or equal to 2.

[0013] As a preferred embodiment, the automatic heat shrink tubing fitting device includes a heat shrink tubing cutting mechanism and a tubing clamping and positioning mechanism; the heat shrink tubing cutting mechanism includes an automatically opening and closing cutting blade assembly, and the tubing clamping and positioning mechanism includes two automatically opening and closing clamping jaws; the cutting blade assembly is located above the clamping jaws; The automatic heat shrink tubing fitting device is configured as follows: When the lower end of the heat shrink tubing extends below the gripper to a set length, the gripper clamps the heat shrink tubing, and the shearing blade assembly cuts the heat shrink tubing into a predetermined section of heat shrink tubing; subsequently, the gripper lowers while clamping the heat shrink tubing, so that the predetermined section of heat shrink tubing is fitted onto the stator lead-out end.

[0014] As a preferred embodiment, the automatic heat shrink tubing fitting device further includes: First mounting bracket; A Y-axis displacement drive unit is configured to drive the first mounting bracket to move along the Y-axis; a vertical plate is disposed on the first mounting bracket; The Z-axis drive unit and Z-axis guide rail are mounted on the vertical plate; The second mounting bracket is slidably disposed on the Z-axis guide rail, and the Z-axis drive unit is configured to drive the second mounting bracket to move along the Z-axis guide rail. A heat shrink tubing reel, mounted on the first mounting bracket, is used for winding heat shrink tubing; The tube feeding guide assembly, guide wheel group, and guide wheel drive unit are all mounted on the second mounting frame. The guide wheel group includes several guide wheels arranged correspondingly on the left and right sides, forming a tube feeding gap between them. The guide wheel drive unit drives the guide wheels to rotate. The heat shrink tubing cutting mechanism and the tube clamping and positioning mechanism are both mounted on the second mounting frame. The tube feeding gap, the cutting area of ​​the cutting blade assembly, and the clamping areas of the two grippers are arranged opposite each other from top to bottom. The release end of the heat shrink tubing extends through the tube feeding guide assembly and passes sequentially through the tube feeding gap, the cutting area, and the clamping area.

[0015] As a preferred embodiment, the tube feeding guide assembly has multiple guide clips or guide tubes, the release end of the heat shrink tubing passes through the multiple guide clips or guide tubes, and at least one of the guide clips or guide tubes is located directly above the shearing zone for positioning the heat shrink tubing during shearing.

[0016] As a preferred embodiment, the automatic heat shrink tubing fitting device further includes an X-axis displacement drive unit, which is configured to drive the tube clamping and positioning mechanism to move along the X-axis to a position directly above the corresponding stator lead-out end.

[0017] As a preferred embodiment, the automatic heat shrink tubing fitting device is configured to perform the following cyclical actions: When the pallet loaded with the stator is delivered to the automatic heat shrink tubing station along the conveyor line, the Y-axis displacement drive unit drives the first mounting bracket to move along the Y-axis, so that the lower end of the heat shrink tubing is aligned with the upper part of the corresponding stator lead-out end. The guide wheel drive unit controls the guide wheel assembly to rotate in order to release a heat shrink tubing of a set length; The grippers clamp the heat shrink tubing, and the shearing blade assembly cuts the heat shrink tubing. The Z-axis drive unit drives the second mounting bracket to descend along the Z-axis guide rail, so that the cut-off predetermined section of heat shrink tubing is fitted downwards onto the corresponding stator lead-out end; When the gripper is released, the Z-axis drive unit drives the second mounting bracket to rise and reset, and the Y-axis displacement drive unit drives the first mounting bracket to reset along the Y-axis.

[0018] As a preferred embodiment, the paint dripping station, the curing station, and the powder coating station are arranged sequentially along the Y-axis; The automatic heat shrink tubing station is connected to the paint dripping station and the curing station via two parallel X-axis conveying lines and a second X-axis conveying line, respectively, so that the automatic heat shrink tubing station is staggered from the paint dripping station and the curing station in the X-axis. A transition conveyor line connects the end of the first X-axis conveyor line to the beginning of the second X-axis conveyor line. One side of the second X-axis conveyor line is connected to the manual installation platform, which extends along the Y-axis in a direction away from the automatic heat shrink tubing equipment.

[0019] An automated sleeve-insertion method for a motor stator coating production line includes the following steps: Step S1: The stator after the insulating varnish has been applied is transported to the automatic heat shrink tubing application station; Step S2: At the automatic heat shrink tubing station, a heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state is fitted onto the stator lead-out end. Step S3: The stator with the heat shrink tubing attached is transported to the curing station, where the insulating varnish is cured and baked at high temperature. The heat from the high-temperature curing and baking process causes the heat shrink tubing to shrink and thus fasten it to the stator lead-out end. Step S4: The cured and heat-shrinkable stator is transported to the powder coating station. With the stator lead-out end covered by the heat-shrinkable tube, insulating powder is applied to the stator end and / or outer wall.

[0020] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it breaks through the traditional process of curing before tubing and manually inserting small tubing. It adopts a new process mode of first inserting large-diameter heat shrink tubing and then using the original high-temperature synchronous heat shrinking process on the production line. This cleverly reuses the heat energy of the curing station, eliminating the need for additional heat shrinking heating equipment, saving energy consumption and station space, and also saving the time occupied by the heat shrinking process. Since the inner diameter of the heat shrink tubing is larger than the maximum radial dimension of the lead-out end in its natural state, the heat shrink tubing can be easily inserted, resulting in a high success rate and efficiency of automatic tubing. This solves the efficiency bottleneck problem caused by manually forcibly inserting small-diameter silicone tubing using elasticity. Furthermore, after high-temperature curing and baking, the heat shrink tubing tightly wraps around the periphery of the stator lead-out end, providing more reliable protection and better consistency than manual operation.

[0021] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a flow chart of multiple stations in the automatic sleeve motor stator coating production line of the present invention; Figure 2 This is a diagram showing the layout of multiple workstations in an automatic sleeve motor stator coating production line according to an embodiment of the present invention. Figure 3 This is a top view of the equipment and conveyor line configured in the automatic heat shrink tubing station according to an embodiment of the present invention. Figure 4 This is a perspective view of the equipment and conveyor line configured at the automatic heat shrink tubing station according to an embodiment of the present invention; Figure 5 yes Figure 4 A magnified view of the area at F1; Figure 6 This is a perspective view of an automatic heat shrink tubing fitting device and testing mechanism according to an embodiment of the present invention; Figure 7 yes Figure 6 Side view of the structure shown; Figure 8 yes Figure 4 A magnified view of the area at F2; Figure 9 yes Figure 8 A magnified view of a portion at F3; Figure 10 yes Figure 9 A magnified view of the area at F4; Figure 11 This is a flowchart illustrating the automatic sleeve method for a motor stator coating production line according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached drawings: W1, spraying station; W2, automatic heat shrink tubing application station; W3, curing station; W4, powder coating station; 1, first X-axis conveyor line; 2, second X-axis conveyor line; 3, transition conveyor line; 4, manual loading platform; 5, lifting connection platform; 51, receiving platform body; 52, Y-axis conveyor bar; 100, automatic heat shrink tubing application equipment; 200, detection mechanism; 101, heat shrink tubing reel; 102, Z-axis drive unit; 103, guide wheel drive unit; 104, Y-axis displacement drive unit; 105, guide wheel assembly; 106, first mounting frame; 107, upright plate; 108, second mounting frame; 109, tubing feeding guide assembly; 110, heat shrink tubing cutting mechanism; 111, tubing clamping and positioning mechanism. Detailed Implementation

[0024] Please refer to Figures 1 to 11 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0025] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] An automated heat shrink tubing production line for motor stators includes, sequentially along the stator conveying direction, a heat shrink tubing station W1, an automatic heat shrink tubing station W2, a curing station W3, and a powder coating station W4. Each station is equipped with its own controller, which communicates with each other or via a host computer to coordinate the production line's rhythm.

[0027] The dripping station W1 is configured to drip insulating varnish onto the stator winding. Using dripping equipment to drip insulating varnish onto the stator winding is a mature technology, which will not be elaborated here.

[0028] The automatic heat shrink tubing station W2 is equipped with an automatic heat shrink tubing device 100, used to apply heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state to the stator lead-out end. The automatic heat shrink tubing station W2 is equipped with a detection mechanism 200, which is configured to detect whether the stator lead-out end is fitted with heat shrink tubing. The detection mechanism 200 typically uses a photographic detection method, including CCD. A manual installation platform 4 is connected to one side of the output end of the automatic heat shrink tubing station W2, and is configured such that when the detection mechanism 200 detects a stator without heat shrink tubing, the stator is transported to the manual installation platform 4, where heat shrink tubing is manually applied, and then the stator returns to the conveyor line (specifically, the second X-axis conveyor line 2 described below) connecting the automatic heat shrink tubing station W2 and the curing station W3.

[0029] The curing station W3 is configured to bake the stator after the varnish has been applied at a high temperature to cure the insulating varnish. Simultaneously, the heat-shrink tubing shrinks due to heat, thus securing it to the stator lead-out end. Using a curing oven to bake the stator after the varnish has been applied at a high temperature is a mature technology and will not be elaborated upon here.

[0030] The powder coating station W4 is configured to coat the stator ends and / or outer wall with insulating powder. Using stator powder coating equipment is a mature technology and will not be elaborated upon here.

[0031] In this embodiment, the paint dripping station W1, the curing station W3, and the powder coating station W4 are arranged sequentially along the Y-axis. The automatic heat shrink tubing application station W2 is connected to the paint dripping station W1 and the curing station W3 respectively via two parallel first X-axis conveying lines 1 and 2, so that the automatic heat shrink tubing application station W2 is completely staggered from the paint dripping station W1 and the curing station W3 in the X-axis. A transition conveying line 3 is connected between the end of the first X-axis conveying line 1 and the beginning of the second X-axis conveying line 2. A manual application platform 4 extending along the Y-axis away from the automatic heat shrink tubing application equipment 100 is connected to one side of the second X-axis conveying line 2. Even if a very small number of cases of missed application occur, they can be intercepted and remedied before entering the curing station W3, preventing stators without heat shrink tubing from flowing into subsequent stations and causing rework or scrap.

[0032] Here, at the input and output ends of the first X-axis conveyor line 1 and the input and output ends of the second X-axis conveyor line 2, corresponding lifting connecting platforms 5 are provided. Each lifting connecting platform 5 has a receiving platform body 51 and Y-axis conveyor bars 52 located at both ends of the receiving platform body 51 along the X-axis. The Y-axis conveyor bars are self-powered and also have a lifting drive to drive the receiving platform and the Y-axis conveyor bars to rise and fall together. For example, at the input end of the first X-axis conveyor line 1, the corresponding lifting connecting platform rises above the conveying height of the first X-axis conveyor line 1. After reaching a set height, it uses its own Y-axis conveyor bar to guide the stator tray from the output end of the paint dripping station W1 onto the lifting connecting platform, and then descends to be level with the conveying height of the first X-axis conveyor line 1, so that the stator tray is conveyed along the first X-axis conveyor line 1. At the output ... The feed bar guides the stator pallet from the lifting connecting platform to the transition conveyor line 3, and then descends to be level with the conveying height of the first X-axis conveyor line 1, so that the stator pallet is conveyed along the transition conveyor line 3. At the input end of the second X-axis conveyor line 2, the corresponding lifting connecting platform rises above the conveying height of the second X-axis conveyor line 2. After reaching the set height, it uses its own Y-axis feed bar to guide the stator pallet from the transition conveyor line 3 to the lifting connecting platform, and then descends to be level with the conveying height of the second X-axis conveyor line 2, so that the stator pallet is conveyed along the second X-axis conveyor line 2. If a stator is found to be missing heat shrink tubing, a corresponding lifting connecting platform is set at the input end of the manual installation platform 4 on the second X-axis conveyor line 2. It rises above the conveying height of the second X-axis conveyor line 2. After reaching the set height, it uses its own Y-axis feed bar to guide the stator pallet from the second X-axis conveyor line 2 to the manual installation platform 4. If normal, it continues to be input along the second X-axis conveyor line 2. The manual installation platform 4 is equipped with a Y-axis conveyor line, which guides the stator tray along the platform. After the heat shrink tubing is manually fitted, pressing the operation button switches the rotation direction of the Y-axis conveyor line's forward and reverse motors. This guides the stator tray along the platform towards the lifting connection platform located at the input end of the second X-axis conveyor line 2, where it is then guided back to the second X-axis conveyor line 2 for normal output. Additionally, the lifting connection platform at the output end of the second X-axis conveyor line 2 rises above its set height, and then uses its own Y-axis conveyor bar to guide the stator tray from the lifting connection platform to the input end of the curing station W3.

[0033] Since both the paint-drip station W1 and the curing station W3 involve high-temperature environments, the automatic heat-shrink tubing station W2 is positioned far away to protect the heat-shrink tubing. This also prevents heat from negatively impacting the precision guide wheel assembly, shearing blade assembly, grippers, and other mechanisms within the automatic heat-shrink tubing equipment 100, as well as the entire roll of heat-shrink tubing material on the tubing reel (e.g., shrinkage or softening deformation, leading to poor tubing supply, inaccurate cutting length, or even failure to feed tubing properly). This ensures the reliable operation of the automatic heat-shrink tubing equipment 100. Furthermore, it allows for sufficient extension space for the manual installation platform 4. With an open area on the side of the main conveyor line along the Y-axis, the platform 4 has ample room to extend, allowing operators to work safely and comfortably. Simultaneously, it better matches the cycle time of the paint-drip station W1 and the curing station W3. Conveying direction: Paint dripping station W1 → First X-axis conveyor line 1 → Automatic heat shrink tubing station W2 (including inspection) → Transition conveyor line → Second X-axis conveyor line 2. Stators with missing heat shrink tubing branch off from the side of the second X-axis conveyor line 2 in the Y direction and enter the manual installation platform 4. Stators with normal operation continue along the second X-axis conveyor line 2. The two paths do not interfere with each other, balancing automation efficiency with the flexibility of manual intervention. This ensures stable operation of the automatic heat shrink tubing equipment 100 in a clean, ambient temperature environment, provides workspace for manual repairs, and also achieves buffering decoupling and abnormal flow diversion between processes.

[0034] Furthermore, the automatic heat shrink tubing station W2 is also equipped with an alarm. The alarm is configured to: if N consecutive stators are found to have missed heat shrink tubing, the alarm will be triggered and the automatic heat shrink tubing equipment 100 will be stopped by the control system. Here, N is a natural number greater than or equal to 2. In this embodiment, N=3 is set, and the manual installation platform 4 can accommodate 2 trays.

[0035] In this embodiment, the automatic heat shrink tubing station W2 is equipped with one or more automatic heat shrink tubing equipment 100 arranged side by side along the X-axis; the automatic heat shrink tubing station W2 is also equipped with a lifting mechanism, which is configured to lift and position the tray when the tray loaded with the stator is transported to the automatic heat shrink tubing station W2. The automatic heat shrink tubing fitting device 100 includes a heat shrink tubing cutting mechanism 110 and a tubing clamping and positioning mechanism 111. The heat shrink tubing cutting mechanism 110 includes an automatically opening and closing cutting blade assembly, and the tubing clamping and positioning mechanism 111 includes two automatically opening and closing grippers. The cutting blade assembly is located above the grippers. The automatic heat shrink tubing fitting device 100 is configured such that when the lower end of the heat shrink tubing extends below the grippers to a set length, the grippers clamp the heat shrink tubing, and the cutting blade assembly cuts the heat shrink tubing to form a predetermined section of heat shrink tubing. Subsequently, the grippers, clamping the heat shrink tubing, descend, allowing the predetermined section of heat shrink tubing to be fitted onto the stator lead-out end. Because the grippers have already clamped the heat shrink tubing during cutting, the predetermined section of heat shrink tubing will not fall or shift due to gravity or elastic recoil after cutting. The grippers maintain the clamping state as the tubing descends, ensuring that the heat shrink tubing is always constrained during the descent, accurately fitting onto the lead-out end. The tubing positioning accuracy is high, and the failure rate is extremely low.

[0036] The automatic heat shrink tubing fitting device 100 further includes: a first mounting frame 106, a Y-axis displacement drive unit 104, a vertical plate 107, a Z-axis drive unit 102, a Z-axis guide rail, a second mounting frame 108, a heat shrink tubing reel 101, a tubing feeding guide assembly 109, a guide wheel assembly 105, and a guide wheel drive unit 103; the Y-axis displacement drive unit 104 is configured to drive the first mounting frame 106 to move along the Y-axis, thereby aligning the stator lead-out end in the Y direction; the vertical plate is mounted on the first mounting frame 106; the Z-axis drive unit 102 and the Z-axis guide rail are mounted on the vertical plate 107; the second mounting frame 108 is slidably mounted on the Z-axis guide rail, and the Z-axis drive unit 102 is configured to drive the second mounting frame 108 to move along the Z-axis guide rail, resulting in fast response speed and high positioning accuracy. A heat shrink tubing reel 101 is mounted on the first mounting bracket 106 for winding heat shrink tubing. A tubing feeding guide assembly 109, a guide wheel assembly 105, a guide wheel drive unit 103, a heat shrink tubing cutting mechanism 110, and a tubing clamping and positioning mechanism 111 are all mounted on the second mounting bracket 108. The guide wheel assembly 105 includes several guide wheels arranged correspondingly on the left and right sides, forming a tubing feeding gap between them. The guide wheel drive unit 103 drives the guide wheels to rotate. The tubing feeding gap, the cutting area of ​​the cutting blade assembly, and the clamping areas of the two grippers are arranged facing each other from top to bottom, ensuring a straight and smooth path for the heat shrink tubing to avoid bending and deformation. The release end of the heat shrink tubing extends through the tubing feeding guide assembly 109 and passes sequentially through the tubing feeding gap, the cutting area, and the clamping area. The tubing guide assembly 109 has multiple guide clamps or guide cylinders 1091. The release end of the heat shrink tubing passes through the multiple guide clamps or guide cylinders 1091, constraining it along the entire path of the heat shrink tubing to prevent twisting or bending during transport. At least one of the guide clamps or guide cylinders 1091 is located directly above the shearing zone, providing proximity support to position the heat shrink tubing during shearing, preventing lateral slippage or deformation under pressure due to shearing force, ensuring a clean cut and precise shearing length. The automatic heat shrink tubing fitting device 100 is configured to perform the following cyclic actions, achieving a high degree of automation with short cycle time and high efficiency: 1. When the tray loaded with the stator is delivered to the automatic heat shrink tubing station W2 along the conveyor line, the Y-axis displacement drive unit 104 drives the first mounting bracket 106 to move along the Y-axis, so that the lower end of the heat shrink tubing is aligned with the upper part of the corresponding stator lead-out end. 2. The guide wheel drive unit 103 controls the guide wheel assembly 105 to rotate in order to release a heat shrink tubing of a set length; 3. The grippers clamp the heat shrink tubing, and the shearing blade assembly cuts the heat shrink tubing; 4. The Z-axis drive unit 102 drives the second mounting bracket 108 to descend along the Z-axis guide rail, so that the cut predetermined section of heat shrink tubing is fitted downwards onto the corresponding stator lead-out end. 5. When the gripper is released, the Z-axis drive unit 102 drives the second mounting bracket 108 to rise and reset, and the Y-axis displacement drive unit 104 drives the first mounting bracket 106 to reset along the Y-axis.

[0037] The same stator can pass through multiple automatic heat shrink tubing devices 100 to apply heat shrink tubing to all of its stator lead-out ends one by one.

[0038] In other embodiments, the automatic heat shrink tubing fitting device 100 further includes an X-axis displacement drive unit, which is disposed on the second mounting bracket 108. The X-axis displacement drive unit is configured to drive the tubing clamping and positioning mechanism 111 to move along the X-axis, thereby moving the cut predetermined section of heat shrink tubing to a position directly above the corresponding stator lead-out end, and then performing a lowering tubing fitting action. This allows for the sequential fitting of heat shrink tubing to multiple stator lead-out ends on the same stator. Of course, multiple such automatic heat shrink tubing fitting devices 100 with X-axis displacement drive units can also be arranged side-by-side along the X-axis, allowing multiple stators to be fitted simultaneously at the automatic heat shrink tubing fitting station W2.

[0039] Next, an automatic sleeve method for a motor stator coating production line is provided. In this embodiment, the method is implemented based on the aforementioned automatic sleeve method for a motor stator coating production line, and includes the following steps: Step S1: The stator after the insulating varnish has been applied is transported to the automatic heat shrink tubing station W2; Step S2: At the automatic heat shrink tubing station W2, a heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state is fitted onto the stator lead-out end. Step S3: The stator with the heat shrink tubing attached is transported to the curing station W3. The insulating varnish is cured and baked at high temperature at the curing station W3, and the heat from the high temperature curing and baking is used to heat and shrink the heat shrink tubing, thereby fastening it to the stator lead-out end. Step S4: The cured and heat-shrinkable stator is transported to the powder coating station W4. With the stator lead-out end covered by the heat-shrinkable tube, insulating powder is applied to the stator end and / or outer wall.

[0040] It should be noted that in actual implementation, the original cooling station can be eliminated as needed. In traditional technology, the cooling station is located after the curing station W3 to cool the high-temperature stator and protect the operators and silicone tubing. However, the heat shrink tubing is applied before entering the curing oven. By eliminating the cooling station, the stator, after being coated with paint, enters the automatic heat shrink tubing application station W2 with residual heat (or room temperature) and then immediately enters the high-temperature curing oven. This ensures full utilization of heat and avoids unnecessary cooling steps. Due to the difference in thermal expansion coefficients between the metal stator and the liquid insulating paint, the new process results in superior insulation strength and adhesion.

[0041] The key design feature of this invention lies in its breakthrough from the traditional process of curing before tubing and manually applying small tubing. It adopts a novel process mode of first applying large-diameter heat shrink tubing, then utilizing the existing high-temperature synchronous heat shrinking process on the production line. This cleverly reuses the heat energy of the curing station W3, eliminating the need for additional heat shrinking heating equipment, saving energy and workstation space, and eliminating the time required for the separate heat shrinking step. Since the inner diameter of the heat shrink tubing is naturally larger than the maximum radial dimension of the lead-out end, the tubing can be easily fitted, resulting in a high success rate and efficiency of automatic tubing. This solves the efficiency bottleneck caused by manually forcibly applying small-diameter silicone tubing using its elasticity. Furthermore, after high-temperature curing and baking, the heat shrink tubing tightly wraps around the periphery of the stator lead-out end, providing more reliable protection and better consistency than manual operation. Therefore, while ensuring a high success rate of tubing application, it improves automation, increases production efficiency, simplifies the process flow, and creates a more compact and concise production line layout, which helps reduce costs.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic sleeve-type motor stator coating production line, characterized in that, It is arranged sequentially along the stator conveying direction as follows: The paint-drip station is configured to drip insulating varnish onto the stator windings. The automatic heat shrink tubing station is equipped with an automatic heat shrink tubing fitting device, which is used to fit heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state onto the stator lead-out end. The curing station is configured to perform high-temperature curing and baking on the stator after the paint is applied, so that the insulating paint is cured. At the same time, the heat shrink tubing is heated and shrinks, thereby fastening it to the stator lead-out end. The powder coating station is configured to coat the stator ends and / or outer wall with insulating powder. The automatic heat shrink tubing fitting device includes a heat shrink tubing cutting mechanism and a tubing clamping and positioning mechanism. The heat shrink tubing cutting mechanism includes an automatically opening and closing cutting blade assembly, and the tubing clamping and positioning mechanism includes two automatically opening and closing grippers. The cutting blade assembly is located above the grippers. The automatic heat shrink tubing fitting device is configured such that when the lower end of the heat shrink tubing extends below the grippers to a set length, the grippers clamp the heat shrink tubing, and the cutting blade assembly cuts the heat shrink tubing to form a predetermined section of heat shrink tubing. Subsequently, the grippers, clamping the heat shrink tubing, descend, causing the predetermined section of heat shrink tubing to be fitted onto the stator lead-out end. The automatic heat shrink tubing fitting equipment also includes: First mounting bracket; The Y-axis displacement drive unit is configured to drive the first mounting bracket to move along the Y-axis. An upright plate is mounted on the first mounting bracket; The Z-axis drive unit and Z-axis guide rail are mounted on the vertical plate; The second mounting bracket is slidably disposed on the Z-axis guide rail, and the Z-axis drive unit is configured to drive the second mounting bracket to move along the Z-axis guide rail. A heat shrink tubing reel, mounted on the first mounting bracket, is used for winding heat shrink tubing; The tube feeding guide assembly, guide wheel group, and guide wheel drive unit are all mounted on the second mounting frame. The guide wheel group includes several guide wheels arranged correspondingly on the left and right sides, forming a tube feeding gap between them. The guide wheel drive unit drives the guide wheels to rotate. The heat shrink tubing cutting mechanism and the tube clamping and positioning mechanism are both mounted on the second mounting frame. The tube feeding gap, the cutting area of ​​the cutting blade assembly, and the clamping areas of the two grippers are arranged opposite each other from top to bottom. The release end of the heat shrink tubing extends through the tube feeding guide assembly and passes sequentially through the tube feeding gap, the cutting area, and the clamping area.

2. The automatic sleeve-type motor stator coating production line according to claim 1, characterized in that, The automatic heat shrink tubing station is equipped with a detection mechanism, which is configured to detect whether the stator lead-out end is fitted with the heat shrink tubing. A manual installation platform is connected to one side of the output end of the automatic heat shrink tubing station, and is configured such that when the detection mechanism detects a stator without heat shrink tubing, the stator is transported to the manual installation platform, where heat shrink tubing is manually applied, and then the stator is returned to the conveyor line connecting the automatic heat shrink tubing station and the curing station.

3. The automatic sleeve-type motor stator coating production line according to claim 2, characterized in that, The automatic heat shrink tubing station is also equipped with an alarm. The alarm is configured to issue an alarm if N stators are continuously detected to be missing heat shrink tubing, and the control system will control the automatic heat shrink tubing equipment to stop. Here, N is a natural number greater than or equal to 2.

4. The automatic sleeve-type motor stator coating production line according to claim 1, characterized in that, The tube feeding guide assembly has multiple guide clips or guide tubes, and the release end of the heat shrink tubing passes through the multiple guide clips or guide tubes. At least one of the guide clips or guide tubes is located directly above the shearing zone, for positioning the heat shrink tubing during shearing.

5. The automatic sleeve-type motor stator coating production line according to claim 1, characterized in that, The automatic heat shrink tubing fitting device further includes an X-axis displacement drive unit, which is configured to drive the tube clamping and positioning mechanism to move along the X-axis to move the cut predetermined section of heat shrink tubing to a position directly above the stator lead-out end.

6. The automatic sleeve-type motor stator coating production line according to claim 1, characterized in that, The automatic heat shrink tubing fitting device is configured to perform the following cyclical actions: When the pallet loaded with the stator is delivered to the automatic heat shrink tubing station along the conveyor line, the Y-axis displacement drive unit drives the first mounting bracket to move along the Y-axis, so that the lower end of the heat shrink tubing is aligned with the upper part of the corresponding stator lead-out end. The guide wheel drive unit controls the guide wheel assembly to rotate in order to release a heat shrink tubing of a set length; The grippers clamp the heat shrink tubing, and the shearing blade assembly cuts the heat shrink tubing. The Z-axis drive unit drives the second mounting bracket to descend along the Z-axis guide rail, so that the cut-off predetermined section of heat shrink tubing is fitted downwards onto the corresponding stator lead-out end; When the gripper is released, the Z-axis drive unit drives the second mounting bracket to rise and reset, and the Y-axis displacement drive unit drives the first mounting bracket to reset along the Y-axis.

7. The automatic sleeve-type motor stator coating production line according to claim 2, characterized in that, The paint dripping station, the curing station, and the powder coating station are arranged sequentially along the Y-axis; The automatic heat shrink tubing station is connected to the paint dripping station and the curing station via two parallel X-axis conveying lines and a second X-axis conveying line, respectively, so that the automatic heat shrink tubing station is staggered from the paint dripping station and the curing station in the X-axis. A transition conveyor line connects the end of the first X-axis conveyor line to the beginning of the second X-axis conveyor line. One side of the second X-axis conveyor line is connected to the manual installation platform, which extends along the Y-axis in a direction away from the automatic heat shrink tubing equipment.

8. An automatic sleeve method for a motor stator coating production line, characterized in that, The automatic sleeved motor stator coating production line according to any one of claims 1 to 7 performs automatic sleeved motor stator coating, the method comprising the following steps: Step S1: The stator after the insulating varnish has been applied is transported to the automatic heat shrink tubing application station; Step S2: At the automatic heat shrink tubing station, a heat shrink tubing with an inner diameter larger than the maximum radial dimension of the stator lead-out end in its natural state is fitted onto the stator lead-out end. Step S3: The stator with the heat shrink tubing attached is transported to the curing station, where the insulating varnish is cured and baked at high temperature. The heat from the high-temperature curing and baking process causes the heat shrink tubing to shrink and thus fasten it to the stator lead-out end. Step S4: The cured and heat-shrinkable stator is transported to the powder coating station. With the stator lead-out end covered by the heat-shrinkable tube, insulating powder is applied to the stator end and / or outer wall.

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