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CN-121755636-B - Rotor sectional riveting device and riveting method thereof

CN121755636BCN 121755636 BCN121755636 BCN 121755636BCN-121755636-B

Abstract

The invention discloses a rotor sectional riveting device and a riveting method thereof, comprising a riveting mechanism, a pressing mechanism, a bearing platform with a riveting station and a riveting unit which are matched, a travel sleeve which is sleeved at the top end of a riveting head and is internally provided with a rebound mechanism, a measuring unit for detecting displacement of the travel sleeve, and a controller which is internally provided with a PID algorithm, wherein the controller is used for linking the mechanisms to realize signal transmission and action control. The invention is provided with three embodiments of single rivet joint rotation type, multi-rivet joint grouping type and multi-rivet joint adjustable type, can detect rivet position deviation in real time and dynamically calibrate rivet joint positions, realizes rivet sequential or grouping and sectionally riveting, has high automation degree, can be integrated in an intelligent assembly line of a variable frequency rotor, adapts to workpieces with different specifications, effectively improves riveting yield and production efficiency, and has strong practicability.

Inventors

  • ZHANG JINGFANG
  • CHEN ZHENHUA
  • WU HAIMING
  • FANG JIAHAO
  • SHEN YANG

Assignees

  • 嘉兴格睿德智能装备有限公司

Dates

Publication Date
20260508
Application Date
20260305

Claims (10)

  1. 1. A rotor segment riveting device comprising a riveting mechanism (100), characterized in that: The riveting mechanism (100) is provided with a pressing mechanism (110), a bearing platform (120) provided with a riveting station (121) and a riveting unit (130), a power output end of the pressing mechanism (110) is provided with a pressure head (111), and the axis of the riveting station (121) is overlapped with that of the pressure head (111); the riveting unit (130) comprises at least one servo driving unit (131) and a riveting head (132), and the power output end of the servo driving unit (131) is connected with the riveting head (132); The riveting mechanism (100) further comprises a travel sleeve (150), a measuring unit (160) and a controller, wherein the travel sleeve (150) is sleeved outside the top end of the riveting head (132), a rebound mechanism (151) is arranged in the travel sleeve (150), the rebound mechanism (151) applies vertical upward thrust to the travel sleeve (150), and a through hole I for the riveting head (132) and the travel sleeve (150) to pass through is formed in the surface of the riveting station (121); The measuring unit (160) is used for detecting the displacement of the travel sleeve (150) in the vertical direction, a PID algorithm and a servo control system are arranged in the controller, and the controller is electrically connected with the pressing mechanism (110), the servo driving unit (131) and the measuring unit (160) respectively.
  2. 2. The rotor segment riveting device of claim 1, wherein the maximum height difference between the top end of the travel sleeve (150) and the top end of the rivet head (132) is greater than the length of the rivet exposed out of the bottom of the rotor.
  3. 3. The rotor segment riveting device according to claim 2, wherein a bushing (122) is arranged above the riveting station (121), and the diameter of the inner edge of the bushing (122) is larger than that of the pressing head (111) and the outer edge of the rotor; a positioning column (123) and a bottom bracket (124) are arranged in the bushing (122), and the axis of the positioning column (123) coincides with the axis of the riveting station (121) and the axis of the bushing (122); The bottom support (124) is sleeved outside the positioning column (123), a first hole corresponding to the rivet on the rotor is formed in the bottom support (124), and the inner diameter of the first hole is the same as that of the first through hole.
  4. 4. The rotor segment riveting device according to claim 1, wherein the riveting mechanism (100) further comprises an ejector unit (140), the ejector unit (140) being located between the bearing platform (120) and the riveting unit (130); the ejection unit (140) is composed of a plurality of ejector rods (141), a spring for pushing the ejection unit (140) to vertically move upwards is arranged at the bottom of the ejection unit, and a second through hole for the ejector rods (141) to pass through is formed in the riveting station (121).
  5. 5. The rotor segment riveting device according to claim 1, wherein the riveting unit (130) further comprises a first limiting rod (133) and a linear bearing (134), the top of the first limiting rod (133) is fixedly connected with the bottom end of the riveting head (132), and the first limiting rod (133) is inserted into the linear bearing (134).
  6. 6. A rotor segment riveting method applied to the rotor segment riveting device as claimed in any one of claims 1 to 5, characterized by comprising the following steps: s1, transferring a rotor after rivet insertion to a riveting station (121), wherein the top end surfaces of a plurality of rivet joints (132) are flush at the moment, and a plurality of stroke sleeves (150) are in a maximum ejection state and the top end surfaces are flush; s2, the controller controls the pressing mechanism (110) to drive the pressing head (111) to slowly move downwards, the rotor is slowly pressed into the bushing (122), the bottom of the rotor is preferentially contacted with the stroke sleeve (150) and is driven to move downwards, and the measuring unit (160) measures displacement change and time nodes of the stroke sleeves (150) in real time and feeds back the displacement change and time nodes to the controller; S3, the controller judges the deviation value around the rivet according to the time node of the displacement change of the travel sleeve (150), records the displacement difference, compares the output signal parameter of the measuring unit (160) with the corresponding parameter of the standard test piece, calculates a dynamic adjustment value and outputs a dynamic calibration signal; S4, the controller executes a calibration program, outputs a control signal of the servo driving unit (131) according to the displacement difference value, and controls the servo driving unit (131) to output the same output quantity as the displacement difference value so as to adjust the position of the rivet joint (132); S5, after calibration is completed, the controller controls the press-in mechanism (110) to rapidly output, the bottom of the rivet is contacted with the top of the rivet joint (132) through the pressing force against the rotor, and the bottom of the rivet expands and curls to form a riveting part; and S6, after the riveting is finished, the pressing mechanism (110) is reset, the ejector rod (141) is ejected by the ejection unit (140) through spring force, and the rotor after the riveting is finished is ejected out of the bushing (122) and transported and output.
  7. 7. The method according to claim 6, wherein the output signal parameters of the measuring unit (160) in step S3 include an output signal time, an output signal value, and a stop time of the output signal.
  8. 8. The method of claim 6, wherein in step S4, the controller records the moving distance of the stroke sleeve (150) according to the action time difference between the stroke sleeve (150) and the standard test piece, thereby controlling the moving distance of the rivet head (132).
  9. 9. The method of rotor segment riveting as claimed in claim 8, wherein the controller controls the rivet head (132) to vertically move downward by a distance corresponding to the moving distance when the moving time of the stroke sleeve (150) is earlier than the moving time of a standard test piece.
  10. 10. The method of rotor segment riveting as claimed in claim 8, wherein the controller controls the rivet head (132) to vertically move upward by a distance corresponding to the movement distance when the movement time of the stroke sleeve (150) is later than the movement time of a standard test piece.

Description

Rotor sectional riveting device and riveting method thereof Technical Field The invention relates to the technical field of motors, in particular to a rotor sectional riveting device and a riveting method thereof. Background The rotor is used as a core component of the motor, and the assembly quality of the rotor directly determines the operation stability and the service life of the motor. The magnetic core of the rotor is formed by stacking a plurality of pieces, and after the magnetic core, the upper magnetic isolation sheet and the lower magnetic isolation sheet are assembled, the magnetic core is influenced by factors such as stacking tolerance, component machining precision and the like, and the problem of non-uniformity of the whole thickness of an assembled workpiece is particularly prominent in the mass production process of the rotor. In the assembly process of the rotor, rivet riveting is a key step for realizing the fixed connection of all parts, and in the prior art, a process of simultaneously riveting multiple rivets is mostly adopted, namely, riveting operation is finished on all rivets on a workpiece at one time through a riveting mechanism. In the prior art, in the riveting process of the same batch, a plurality of rivets are usually arranged on one rotor, and in order to improve the riveting efficiency, a person skilled in the art usually selects a one-time riveting process, that is, one pressing head acts on the plurality of rivets at the same time, so as to realize that the plurality of rivets finish the riveting operation at the same time. Although the above technical method can improve riveting efficiency, when the rotor workpiece with uneven thickness is subjected to uniform riveting stroke, the riveting method can cause that part of rivets cannot form effective butt joint with rivet joints due to the height difference of all parts of the workpiece, the problems of incomplete riveting and insufficient outward turning angle of the rivets occur, and part of rivets cannot even form effective riveting parts, so that connection looseness of all parts of the rotor is caused. In order to solve the problems, some technologies try to improve the riveting effect by increasing the riveting pressure, but the local deformation of the workpiece is easily caused by the mode, so that the deviation of the rotor assembly precision is further aggravated, and the technology adapts to the thickness difference of the workpiece by manually adjusting the position of the rivet joint, but the efficiency is low, the mass production requirement of the intelligent assembly line of the rotor cannot be met, the error of manual operation is large, and the consistency of the riveting quality is difficult to ensure. Meanwhile, the existing riveting device lacks the functions of real-time detection and dynamic calibration of the position deviation of the workpiece rivet, the working positions of all the rivet joints cannot be adjusted according to the actual thickness difference of the workpiece, and the precision and the suitability of the riveting process are poor. Therefore, for the person skilled in the art, how to adapt to the non-uniform thickness of the rotor under the condition that the pressing stroke is kept unchanged in the riveting process, and finally, a riveting process capable of performing adaptive adjustment in real time is formed, so that the technical problems of unreasonable riveting, inconsistent quality and poor suitability in the prior art are solved, and the production requirements of the intelligent assembly line of the rotor are met, and the assembly quality of the rotor is improved. Disclosure of Invention The invention aims to provide a rotor sectional riveting device and a riveting method thereof, which are used for solving the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: the rotor sectional riveting device comprises a riveting mechanism, wherein the riveting mechanism is provided with a press-in mechanism, a bearing platform provided with a riveting station and a riveting unit, a pressure head is arranged at the power output end of the press-in mechanism, and the riveting station is overlapped with the axial lead of the pressure head; the riveting unit comprises at least one servo driving unit and a riveting head, and the power output end of the servo driving unit is connected with the riveting head; The riveting mechanism further comprises a travel sleeve, a measuring unit and a controller, wherein the travel sleeve is sleeved outside the top end of the riveting head, a rebound mechanism is arranged in the travel sleeve, the rebound mechanism applies vertical upward thrust to the travel sleeve, and a through hole I for the riveting head and the travel sleeve to pass through is formed in the surface of the riveting station; The measuring unit is used for detecting the displacement of the tra