Motor rotor structure press mounting and laser marking system and method
By integrating laser marking and pressing processes, and utilizing the mapping relationship during pressing to achieve automatic focusing of the laser marking device, the problems of reduced production cycle and increased equipment costs have been solved, thereby improving production efficiency and saving costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHIXIN TECH CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-07-21
AI Technical Summary
Existing laser marking systems for motor rotor structures require an additional focusing process after the motor rotor structure is transported to the laser marking device, which reduces the production cycle time and increases equipment and debugging costs when using automatic focusing.
By integrating the laser marking process with the pressing process, and utilizing the correspondence between the pressing head's downward stroke and the top surface of the rotor end plate during the pressing process, the mapping relationship is pre-stored in the control unit to achieve automatic focusing of the laser marking device, avoiding additional hardware additions and focusing processes.
It improves production cycle time, saves equipment and debugging costs, and enables automatic focusing of the laser marking device without the need for additional hardware investment.
Smart Images
Figure CN121289767B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of laser technology, and specifically relates to a press-fitting and laser marking system and method for an electric motor rotor structure. Background Technology
[0002] With the rapid development of new energy vehicles, the demand for motors in new energy vehicles is becoming more diversified. As the core component of motors, the types of motor rotor structures are also increasing. Among them, after the press-fitting of the motor rotor structure is completed (usually after the rotor pressure ring of the motor rotor structure is pressed onto the rotor assembly of the motor rotor structure), the use of a laser marking machine to engrave the rotor QR code information on the rotor end plate of the rotor assembly (including the assembled rotor shaft, rotor core and rotor end plate) is an essential process before the motor rotor structure is off the production line.
[0003] However, due to the overlapping tolerances between different motor rotor structures, when using a laser marking machine to mark the rotor end plate, the elevation of the laser marking machine's focal point often deviates significantly from the elevation of the top surface of the rotor end plate. This results in blurry QR code printing that cannot be recognized by the camera. To solve this problem, existing laser marking systems for motor rotor structures typically use manual focusing (manually adjusting the elevation or focal length of the laser marking unit) or automatic focusing (adding an automatic focusing component to the laser marking machine, such as adding a ranging component to one side of the laser marking machine's scanning head to automatically adjust the elevation or focal length of the laser marking unit) to position the focal point of the laser marking unit on the top surface of the rotor end plate.
[0004] However, this also means that existing laser marking systems for motor rotor structures require an additional focusing process after the motor rotor structure is transported to the laser marking device, which reduces the production cycle time. Furthermore, when using automatic focusing, existing laser marking systems for motor rotor structures require additional automatic focusing components, which increases equipment and debugging costs. Summary of the Invention
[0005] This invention provides a pressing and laser marking system and method for motor rotor structures, which solves the problem that existing laser marking systems for motor rotor structures require an additional focusing process after the motor rotor structure is transported to the laser marking device, which reduces the production cycle. Furthermore, existing laser marking systems for motor rotor structures that use automatic focusing require additional automatic focusing components, which increases equipment and debugging costs.
[0006] The technical solution adopted in this invention is: a press-fitting and laser marking system for an electric motor rotor structure, comprising: a laser marking device, a control unit, a conveying unit, and a press-fitting device; The control unit pre-stores a first mapping relationship between the elevation of the focal position of the laser marking device and the pressing stroke of the pressing head of the pressing device; The conveying unit is used to convey the base and the rotor assembly of the motor rotor structure positioned on the base to the pressing station below the pressing device; The pressing device is used to press the rotor pressure ring of the motor rotor structure onto the rotor assembly at the pressing station, thereby completing the pressing of the motor rotor structure and sending the pressing stroke information of the pressing head to the control unit. The conveying unit is also used to convey the base and the pressed motor rotor structure to the marking station below the laser marking machine; The control unit is used to control the laser marking device to adjust the elevation of the focal position according to the downward stroke information and the first mapping relationship, and to position the focal position of the laser marking device to the top surface of the rotor end plate of the rotor assembly on the marking station; The laser marking device is used to laser mark the top surface of the rotor end plate.
[0007] The press-fitting and laser marking system for the motor rotor structure integrates the laser marking and press-fitting processes. By utilizing the correspondence between the downward stroke of the press head during press-fitting and the top surface of the rotor end plate of the rotor assembly transported to the marking station, it determines the first mapping relationship between the elevation of the laser marking device's focal point and the downward stroke of the press head. This first mapping relationship is pre-stored in the control unit. By having the press-fitting device send the downward stroke information to the control unit simultaneously with the press-fitting of the motor rotor structure, the control unit can immediately control the laser marking device to automatically focus (i.e., adjust the elevation of the focal point) after the press-fitting process is completed, combining the pre-stored first mapping relationship with the received downward stroke information. This allows the focusing process to be completed in advance during the press head's reset and upward movement, or during the transport of the press-fitted motor rotor structure to the marking station, eliminating the need to wait until the motor rotor structure is transported to the marking station before performing the focusing process, effectively improving production cycle time.
[0008] In terms of hardware, by integrating the functions of the control unit into the control module of the laser marking device, the pressing and laser marking system of the motor rotor structure provided by this invention can realize the automatic focusing function. At the same time, only the software of the control module of the laser marking device needs to be upgraded, without adding additional hardware, thus saving equipment costs and debugging costs.
[0009] In the press-fitting and laser marking system for the motor rotor structure provided by this invention, the method by which the laser marking device adjusts the elevation of its focal point is determined by the type of laser marking device used (height adjustable or focal length adjustable). Since different types of laser marking devices have different methods for adjusting the elevation of their focal point, the press-fitting and laser marking system for the motor rotor structure provided by this invention also offers different technical solutions, including but not limited to: In one technical solution, the laser marking device includes a lifting device and a first laser marking unit mounted on the lifting device; the first laser marking unit is disposed above the marking station; the first laser marking unit is used to emit marking laser downwards; The lifting device is used to drive the first laser marking unit to move up and down in the vertical direction; The control unit is used to control the lifting device to drive the first laser marking unit to move vertically according to the downward stroke information and the first mapping relationship, so as to position the focal position of the first laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
[0010] In another technical solution, the laser marking device includes a second laser marking unit disposed above the marking station; The second laser marking unit is used to emit a marking laser downwards and can adjust the focal length of the emitted marking laser; The control unit is used to control the second laser marking unit to adjust the focal length of the emitted marking laser according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate of the rotor assembly on the marking station.
[0011] Furthermore, the second laser marking unit includes a laser, an optical path assembly, and a scanning galvanometer, which are installed in sequence. The laser is used to generate a marking laser. The marking laser is emitted from the laser, passes through the optical path assembly, is incident on the scanning galvanometer, and is then reflected by the scanning galvanometer before being emitted downwards. The optical path assembly is used to adjust the focal length of the marking laser. The control unit is used to control the optical path assembly to adjust the focal length of the marking laser according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
[0012] The specific structure of the optical path component and the method of adjusting the focal length of the marking laser through the optical path component are conventional technologies in the field of laser marking technology, and will not be described in detail in this invention.
[0013] Furthermore, the conveying unit is a conveying line, which is used to convey the base and the rotor assembly of the motor rotor structure positioned on the base to the pressing station below the pressing device; the conveying line is also used to move the base and the pressed motor rotor structure to the marking station below the laser marking machine.
[0014] The base and the completed motor rotor structure are moved from the pressing station to the marking station using the conveyor line, so that the elevation of the top surface of the rotor end plate of the completed motor rotor structure remains consistent from pressing to laser marking, which can effectively simplify the calibration of the first mapping relationship.
[0015] The present invention also provides a method for press-fitting and laser marking of a motor rotor structure, wherein the method for press-fitting and laser marking of a motor rotor structure is based on the press-fitting and laser marking system for a motor rotor structure provided by the present invention; The pressing and laser marking method for the motor rotor structure includes: The base and the rotor assembly of the motor rotor structure positioned on the base are transported to the pressing station below the pressing device using a conveying unit; The press-fitting device is used to press the rotor pressure ring of the motor rotor structure onto the rotor assembly at the press-fitting station, thereby completing the press-fitting of the motor rotor structure and sending the pressing stroke information of the press head of the press-fitting device to the control unit. The base and the pressed motor rotor structure are transported to the marking station below the laser marking machine using a conveying unit. The control unit controls the laser marking machine to adjust the elevation of the focal position based on the received pressing stroke information and the pre-stored first mapping relationship, so as to position the focal position of the laser marking machine on the top surface of the rotor end plate of the rotor assembly at the marking station. The top surface of the rotor end plate is laser-marked using the laser marking device.
[0016] In the press-fitting and laser marking method for the motor rotor structure provided by this invention, the method for adjusting the elevation of the focal position of the laser marking device is determined according to the type of laser marking device used (height adjustable or focal length adjustable). Since different types of laser marking devices have different methods for adjusting the elevation of the focal position, the press-fitting and laser marking method for the motor rotor structure provided by this invention also provides different technical solutions, including but not limited to: In one technical solution, the method by which the control unit controls the laser marking device to adjust the elevation of the focal position includes: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the lifting device of the laser marking machine according to the target elevation value to drive the first laser marking unit of the laser marking machine to move vertically, so as to position the focal position of the first laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
[0017] In another technical solution, the method by which the control unit controls the laser marking device to adjust the elevation of the focal position includes: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the second laser marking unit of the laser marking machine to adjust the focal length of the emitted marking laser according to the target elevation value, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate of the rotor assembly at the marking station.
[0018] Furthermore, the method by which the control unit controls the second laser marking unit to adjust the focal length of the emitted marking laser according to the target elevation value includes: A second mapping relationship is established between the focal position of the laser marking device and the focal length of the second laser marking unit, and the second mapping relationship is pre-stored in the control unit; The control unit obtains the target focal length value of the second laser marking unit based on the target elevation value and the pre-stored second mapping relationship; The control unit controls the second laser marking unit to adjust the focal length of the marking laser emitted based on the obtained target focal length value.
[0019] Furthermore, the conveying unit is configured as a conveyor line; The base and the rotor assembly of the motor rotor structure positioned on the base are transported to the pressing station below the pressing device using the conveyor line; The base and the completed press-fitted motor rotor structure are moved to the marking station below the laser marking machine using the conveyor line. Attached Figure Description
[0020] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the press-fitting and laser marking system for the motor rotor structure in Example 1; Figure 2 This is a flowchart of the press-fitting and laser marking method for the motor rotor structure in Example 2; Among them, 1—conveyor line, 2—base, 3—rotor core, 4—rotor end plate, 5—rotor pressure ring, 6—pressing device, 7—first laser marking unit, and 8—lifting device. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0023] Example 1: like Figure 1 As shown, this embodiment 1 provides a press-fitting and laser marking system for an electric motor rotor structure, including: a laser marker, a control unit, a conveying unit, and a press-fitting device 6; The control unit has a pre-stored first mapping relationship between the elevation of the focal position of the laser marking device and the pressing stroke of the pressing head of the pressing device 6; The conveying unit is used to convey the base 2 and the rotor assembly of the motor rotor structure positioned on the base 2 to the pressing station below the pressing device 6; The pressing device 6 is used to press the rotor pressure ring 5 of the motor rotor structure onto the rotor assembly at the pressing station, complete the pressing of the motor rotor structure, and send the pressing stroke information of the pressing head to the control unit. The conveying unit is also used to transport the base 2 and the completed press-fitted motor rotor structure to the marking station below the laser marking machine; The control unit is used to control the laser marking device to adjust the elevation of the focal position according to the downward stroke information and the first mapping relationship, and to position the focal position of the laser marking device on the top surface of the rotor end plate 4 of the rotor assembly on the marking station. The laser marking machine is used to laser mark the top surface of the rotor end plate 4.
[0024] The press-fitting and laser marking system for the motor rotor structure integrates the laser marking and press-fitting processes. By utilizing the correspondence between the downward stroke of the press head during press-fitting and the top surface of the rotor end plate 4 of the rotor assembly transported to the marking station, a first mapping relationship is established between the elevation of the laser marking device's focal point and the downward stroke of the press head of the press-fitting device 6. This first mapping relationship is pre-stored in the control unit. By having the press-fitting device 6 send downward stroke information to the control unit simultaneously with the press-fitting of the motor rotor structure, the control unit can immediately control the laser marking device to automatically focus (i.e., adjust the elevation of the focal point) after the press-fitting process is completed, combining the pre-stored first mapping relationship with the received downward stroke information. This allows the focusing process to be completed in advance during the press head's reset and upward movement, or during the transport of the press-fitted motor rotor structure to the marking station, eliminating the need to wait until the motor rotor structure is transported to the marking station before performing the focusing process, effectively improving production cycle time.
[0025] In terms of hardware, by integrating the functions of the control unit into the control module of the laser marking device, the pressing and laser marking system of the motor rotor structure provided by this invention can realize the automatic focusing function. At the same time, only the software of the control module of the laser marking device needs to be upgraded, without adding additional hardware, thus saving equipment costs and debugging costs.
[0026] Among them, such as Figure 1 As shown, the motor rotor structure includes a rotor assembly and a rotor pressure ring 5; The rotor assembly includes a rotor shaft, a rotor core 3 sleeved outside the rotor shaft, and a rotor end plate 4, with the rotor end plate 4 attached to the top surface of the rotor core 3.
[0027] In the press-fitting and laser marking system for the motor rotor structure provided in Embodiment 1, the method of adjusting the elevation of the focal position of the laser marking device is determined according to the type of laser marking device used (height adjustable or focal length adjustable). Since different types of laser marking devices have different methods of adjusting the elevation of the focal position, the press-fitting and laser marking system for the motor rotor structure provided by this invention also provides different technical solutions. In Embodiment 1, two of these solutions will be described.
[0028] Option 1: like Figure 1 As shown, the laser marking machine includes a lifting device 8 and a first laser marking unit 7 mounted on the lifting device 8; the first laser marking unit 7 is located above the marking station; the first laser marking unit 7 is used to emit marking laser downwards; The lifting device 8 is used to drive the first laser marking unit 7 to move up and down in the vertical direction; The control unit is used to control the lifting device 8 to drive the first laser marking unit 7 to move vertically according to the downward stroke information and the first mapping relationship, so as to position the focal position of the first laser marking unit 7 to the top surface of the rotor end plate 4 of the rotor assembly on the marking station.
[0029] Option 2: The laser marking device includes a second laser marking unit (not shown) positioned above the marking station. The second laser marking unit is used to emit marking laser downwards and can adjust the focal length of the emitted marking laser. The control unit is used to control the second laser marking unit to adjust the focal length of the marking laser emitted by the second laser marking unit according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate 4 of the rotor assembly on the marking station.
[0030] Specifically, in the above-mentioned Scheme 2, the second laser marking unit includes a laser, an optical path assembly, and a scanning galvanometer installed in sequence; The laser is used to generate the marking laser. The marking laser is emitted from the laser, passes through the optical path assembly, is incident on the scanning galvanometer, and is then reflected by the scanning galvanometer before being emitted downwards. The optical path assembly is used to adjust the focal length of the marking laser. The control unit is used to control the optical path assembly to adjust the focal length of the marking laser according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate 4 of the rotor assembly on the marking station.
[0031] The specific structure of the optical path components and the method of adjusting the focal length of the marking laser through the optical path components are conventional technologies in the field of laser marking technology, and will not be described in detail in this invention.
[0032] Preferred, such as Figure 1 As shown, in this embodiment 1, the conveying unit is the conveying line 1. The conveying line 1 is used to convey the base 2 and the rotor assembly of the motor rotor structure positioned on the base 2 to the pressing station below the pressing device 6. The conveying line 1 is also used to move the base 2 and the pressed motor rotor structure to the marking station below the laser marking machine.
[0033] By using conveyor line 1 to move base 2 and the completed press-fit motor rotor structure from the press-fit station to the marking station, the elevation of the top surface of the rotor end plate 4 of the completed press-fit motor rotor structure remains consistent from press-fit to laser marking, which can effectively simplify the calibration of the first mapping relationship.
[0034] Example 2: This embodiment 2 provides a method for press-fitting and laser marking of a motor rotor structure, which is based on the press-fitting and laser marking system for a motor rotor structure provided in embodiment 1. like Figure 2 As shown, the press-fitting and laser marking methods for the motor rotor structure include: The base 2 and the rotor assembly of the motor rotor structure positioned on the base 2 are transported to the pressing station below the pressing device 6 using the conveying unit; The rotor ring 5 of the motor rotor structure is pressed onto the rotor assembly at the pressing station using the pressing device 6, thus completing the pressing of the motor rotor structure and sending the pressing stroke information of the pressing head of the pressing device 6 to the control unit. The base 2 and the completed press-fit motor rotor structure are transported to the marking station below the laser marking machine by the conveying unit. The control unit controls the laser marking machine to adjust the elevation of the focal position according to the received pressing stroke information and the pre-stored first mapping relationship, so as to position the focal position of the laser marking machine on the top surface of the rotor end plate 4 of the rotor assembly on the marking station. Laser marking is performed on the top surface of rotor end plate 4 using a laser marking machine.
[0035] In the press-fitting and laser marking method for the motor rotor structure provided in Embodiment 2, the method for adjusting the elevation of the focal point of the laser marking device is determined by the type of laser marking device used (height adjustable or focal length adjustable). Since different types of laser marking devices have different methods for adjusting the elevation of the focal point, the press-fitting and laser marking method for the motor rotor structure provided by this invention also provides different technical solutions. In Embodiment 2, one solution is proposed for each of the two solutions proposed in Embodiment 1 (i.e., the aforementioned Solution 1 and Solution 2): Option A (corresponding to Option 1 in Implementation Example 1): The methods by which the control unit controls the laser marking device to adjust the elevation of the focal point include: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the lifting device 8 of the laser marking machine according to the target elevation value to drive the first laser marking unit 7 of the laser marking machine to move vertically, so as to position the focal position of the first laser marking unit 7 on the top surface of the rotor end plate 4 of the rotor assembly on the marking station.
[0036] Option B (corresponding to Option 2 in Implementation Example 1): The methods by which the control unit controls the laser marking device to adjust the elevation of the focal point include: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the second laser marking unit of the laser marking machine to adjust the focal length of the emitted marking laser according to the target elevation value, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate 4 of the rotor assembly on the marking station.
[0037] Specifically, in the above scheme B, the method by which the control unit controls the second laser marking unit to adjust the focal length of the emitted marking laser according to the target elevation value includes: A second mapping relationship is established between the focal position of the laser marking device and the focal length of the second laser marking unit, and the second mapping relationship is pre-stored in the control unit; The control unit obtains the target focal length value of the second laser marking unit based on the target elevation value and the pre-stored second mapping relationship; The control unit controls the second laser marking unit to adjust the focal length of the marking laser emitted based on the obtained target focal length value.
[0038] Preferably, in this embodiment 2, the conveying unit is configured as conveyor line 1; The base 2 and the rotor assembly of the motor rotor structure positioned on the base 2 are transported to the pressing station below the pressing device 6 using the conveyor line 1; The base 2 and the completed press-fitted motor rotor structure are moved to the marking station below the laser marking machine using conveyor line 1.
[0039] The press-fitting and laser marking system and method for motor rotor structure provided by this invention have at least the following technical effects or advantages: 1. The press-fitting and laser marking system for the motor rotor structure integrates the laser marking and press-fitting processes of the motor rotor structure. By utilizing the correspondence between the downward stroke of the press head during press-fitting and the top surface of the rotor end plate 4 of the rotor assembly transported to the marking station, the system calibrates the first mapping relationship between the elevation of the focal position of the laser marker and the downward stroke of the press head of the press-fitting device 6, and stores this first mapping relationship in the control unit. By having the press-fitting device 6 send the downward stroke information to the control unit while completing the press-fitting of the motor rotor structure, the control unit can immediately control the laser marker to automatically focus (i.e., control the laser marker to adjust the elevation of the focal position) after the press-fitting process is completed, based on the pre-stored first mapping relationship and the received downward stroke information. This allows the focusing process to be completed in advance during the process of the press head resetting and moving upward, or during the process of transporting the press-fitted motor rotor structure to the marking station, without having to wait until the motor rotor structure is transported to the marking station to perform the focusing process, thus effectively improving the production cycle time.
[0040] 2. In terms of hardware, by integrating the functions of the control unit into the control module of the laser marking device, the pressing and laser marking system of the motor rotor structure provided by this invention can realize the automatic focusing function. At the same time, only the software of the control module of the laser marking device needs to be upgraded, without adding additional hardware, thus saving equipment costs and debugging costs.
[0041] 3. Using conveyor line 1, the base 2 and the completed press-fit motor rotor structure are moved from the press-fit station to the marking station, so that the elevation of the top surface of the rotor end plate 4 of the completed press-fit motor rotor structure remains consistent from press-fit to laser marking, which can effectively simplify the calibration of the first mapping relationship.
[0042] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.
Claims
1. A press-fitting and laser marking system for an electric motor rotor structure, characterized in that, include: Laser marking device, control unit, conveying unit and pressing device; The control unit pre-stores a first mapping relationship between the elevation of the focal position of the laser marking device and the pressing stroke of the pressing head of the pressing device; The conveying unit is used to convey the base and the rotor assembly of the motor rotor structure positioned on the base to the pressing station below the pressing device; The pressing device is used to press the rotor pressure ring of the motor rotor structure onto the rotor assembly at the pressing station, thereby completing the pressing of the motor rotor structure and sending the pressing stroke information of the pressing head to the control unit. The conveying unit is also used to convey the base and the pressed motor rotor structure to the marking station below the laser marking machine; The control unit is used to control the laser marking device to adjust the elevation of the focal position according to the downward stroke information and the first mapping relationship, and to position the focal position of the laser marking device to the top surface of the rotor end plate of the rotor assembly on the marking station; The laser marking device is used to laser mark the top surface of the rotor end plate.
2. The press-fitting and laser marking system for the motor rotor structure according to claim 1, characterized in that: The laser marking device includes a lifting device and a first laser marking unit mounted on the lifting device; the first laser marking unit is located above the marking station; the first laser marking unit is used to emit marking laser downwards; The lifting device is used to drive the first laser marking unit to move up and down in the vertical direction; The control unit is used to control the lifting device to drive the first laser marking unit to move vertically according to the downward stroke information and the first mapping relationship, so as to position the focal position of the first laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
3. The press-fitting and laser marking system for the motor rotor structure according to claim 1, characterized in that: The laser marking device includes a second laser marking unit disposed above the marking station; The second laser marking unit is used to emit a marking laser downwards and can adjust the focal length of the emitted marking laser; The control unit is used to control the second laser marking unit to adjust the focal length of the emitted marking laser according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate of the rotor assembly on the marking station.
4. The press-fitting and laser marking system for the motor rotor structure according to claim 3, characterized in that: The second laser marking unit includes a laser, an optical path assembly, and a scanning galvanometer installed in sequence; The laser is used to generate a marking laser. The marking laser is emitted from the laser, passes through the optical path assembly, is incident on the scanning galvanometer, and is then reflected by the scanning galvanometer before being emitted downwards. The optical path assembly is used to adjust the focal length of the marking laser. The control unit is used to control the optical path assembly to adjust the focal length of the marking laser according to the downward stroke information and the first mapping relationship, so as to position the focal position of the second laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
5. The press-fitting and laser marking system for the motor rotor structure according to claim 1, characterized in that: The conveying unit is a conveyor line, which is used to convey the base and the rotor assembly of the motor rotor structure positioned on the base to the pressing station below the pressing device; the conveyor line is also used to move the base and the pressed motor rotor structure to the marking station below the laser marking machine.
6. A method for press-fitting and laser marking a motor rotor structure, characterized in that: The pressing and laser marking method for the motor rotor structure is implemented using the pressing and laser marking system for the motor rotor structure as described in any one of claims 1-5; The pressing and laser marking method for the motor rotor structure includes: The base and the rotor assembly of the motor rotor structure positioned on the base are transported to the pressing station below the pressing device using a conveying unit; The press-fitting device is used to press the rotor pressure ring of the motor rotor structure onto the rotor assembly at the press-fitting station, thereby completing the press-fitting of the motor rotor structure and sending the pressing stroke information of the press head of the press-fitting device to the control unit. The base and the completed press-fitted motor rotor structure are transported to the marking station below the laser marking machine using a conveying unit. The control unit controls the laser marking machine to adjust the elevation of the focal position based on the received pressing stroke information and the pre-stored first mapping relationship, so as to position the focal position of the laser marking machine on the top surface of the rotor end plate of the rotor assembly at the marking station. The top surface of the rotor end plate is laser-marked using the laser marking device.
7. The method for press-fitting and laser marking the motor rotor structure according to claim 6, characterized in that: The method by which the control unit controls the laser marking device to adjust the elevation of the focal position includes: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the lifting device of the laser marking machine according to the target elevation value to drive the first laser marking unit of the laser marking machine to move vertically, so as to position the focal position of the first laser marking unit to the top surface of the rotor end plate of the rotor assembly on the marking station.
8. The method for press-fitting and laser marking the motor rotor structure according to claim 6, characterized in that: The method by which the control unit controls the laser marking device to adjust the elevation of the focal position includes: The control unit uses the received downward stroke information and the pre-stored first mapping relationship to obtain the target elevation value of the focal position of the laser marking device; The control unit controls the second laser marking unit of the laser marking machine to adjust the focal length of the emitted marking laser according to the target elevation value, so as to position the focal position of the second laser marking unit on the top surface of the rotor end plate of the rotor assembly at the marking station.
9. The method for press-fitting and laser marking of the motor rotor structure according to claim 8, characterized in that: The method by which the control unit controls the second laser marking unit to adjust the focal length of the emitted marking laser according to the target elevation value includes: A second mapping relationship is established between the focal position of the laser marking device and the focal length of the second laser marking unit, and the second mapping relationship is pre-stored in the control unit; The control unit obtains the target focal length value of the second laser marking unit based on the target elevation value and the pre-stored second mapping relationship; The control unit controls the second laser marking unit to adjust the focal length of the marking laser emitted based on the obtained target focal length value.
10. The method for press-fitting and laser marking of the motor rotor structure according to claim 6, characterized in that: The conveying unit is configured as a conveyor line; The base and the rotor assembly of the motor rotor structure positioned on the base are transported to the pressing station below the pressing device using the conveyor line; The base and the completed press-fitted motor rotor structure are moved to the marking station below the laser marking machine using the conveyor line.
Citation Information
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