CN-122007806-A - Laminated iron core production method, production equipment and laminated iron core

CN122007806ACN 122007806 ACN122007806 ACN 122007806ACN-122007806-A

Abstract

The invention discloses a laminated iron core production method, production equipment and a laminated iron core, comprising the following steps of obtaining blanking patterns and initial cutting and welding paths of iron core material strips; the method comprises the steps of firstly, carrying out initial cutting and welding on iron core material strips to be connected, identifying local reinforcement sections distributed along the initial cutting and welding path based on blanking patterns, determining geometric patterns of path sections corresponding to each local reinforcement section to generate a target cutting and welding path, and carrying out cutting and welding on the iron core material strips to be connected according to the target cutting and welding path. According to the invention, the cutting and welding stress distribution is optimized through the accurate and intelligent local lifting of the welding strength, so that the integral strength of the welding seam is effectively enhanced, the stress concentration during blanking is dispersed, the failure problems of cracks, fractures and the like of the welding seam in the blanking process are avoided, and the structural stability of the connecting part of the iron core material belt is improved.

Inventors

TAN YOUCHUN
XIANG YUAN
CAO ZHONGWEI
WU GUANGLEI

Assignees

苏州范斯特机械科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (10)

1. The production method of the laminated iron core is characterized by comprising the following steps of: Obtaining a blanking pattern of an iron core material belt and an initial cutting and welding path; Identifying localized reinforcement segments distributed along the initial cutoff path based on the blanking profile; determining the geometric style of the path segment corresponding to each local reinforcement segment to generate a target cutting and welding path; and cutting and welding the iron core material strips to be connected according to the target cutting and welding path.
2. The laminated core production method of claim 1, wherein the step of identifying locally strengthened segments distributed along the initial cutoff path based on the blanking pattern comprises: Determining easily broken risk points on the initial cutting and welding path according to the blanking pattern; identifying and marking welding strengthening points on the initial cutting and welding path based on each easy-to-break sub-risk point; a continuous path segment defined by adjacent weld strengthening points is determined as the localized strengthening segment.
3. The laminated core production method as claimed in claim 2, wherein the step of determining the risk point of easy breakage on the initial cutoff path from the blanking pattern comprises: Obtaining the minimum clearance position between stamping positions of adjacent iron core chips on two sides of the initial cutting and welding path in the blanking pattern; and determining a vertical projection point of the minimum clearance position on the initial cutting and welding path as the easy-fracture risk point.
4. The laminated core production method of claim 2, wherein the step of identifying and marking weld reinforcement points on the initial cutoff path based on each of the breakable sub-risk points comprises: Identifying path points meeting preset conditions to two sides along the initial cutting and welding path by taking the easy-to-break risk points as references, and taking the path points meeting preset conditions as welding strengthening points; The preset conditions comprise that the distance between the welding strengthening point and the corresponding easy-to-break risk point is larger than or equal to a first preset value, and the minimum gap between the welding strengthening point and the stamping position profile of the adjacent iron core chip is larger than or equal to a second preset value.
5. The method of claim 1, wherein the geometric pattern comprises one or more of a wave, a zigzag, and an arc.
6. The laminated core production method as claimed in claim 5, further comprising the step of: And matching the local reinforcement section with a corresponding target geometric pattern based on the risk level of the easy-to-break risk point corresponding to the local reinforcement section.
7. The laminated core production method as claimed in claim 1, further comprising the step of: Acquiring thickness information of the iron core material belt; And shape parameters of the geometric patterns matched for the local reinforcement sections based on the thickness information.
8. The laminated core production method according to claim 1, wherein the step of performing cutting and welding of the core material strips to be connected according to the target cutting and welding path comprises: in the welding process, acquiring a welding position in real time; and when the welding position is positioned in the local strengthening section, adjusting laser welding process parameters.
9. A laminated iron core production device, which is characterized by being used for realizing the laminated iron core production method according to any one of claims 1-8, wherein the laminated iron core production device at least comprises an unreeling device, a cutting and welding device and a stamping forming device which are sequentially arranged.
10. A laminated core, characterized in that the laminated core is manufactured by the laminated core manufacturing apparatus according to claim 9.

Description

Laminated iron core production method, production equipment and laminated iron core Technical Field The invention relates to the technical field of laminated iron core manufacturing, in particular to a laminated iron core production method, production equipment and a laminated iron core. Background The performance of the motor core, which is a core component of a motor stator and a motor rotor, directly determines the energy efficiency and the operation stability of the motor, and the motor core is usually formed by laminating iron core sheets punched from an iron core material belt. Because the iron core material is supplied in a coiled manner, a plurality of coiled iron core material belts need to be connected end to end in the production process so as to ensure the continuity and the efficiency of production. However, if the butt weld occurs in the effective area of the final stamped iron core sheet, the consistency of the electromagnetic properties thereof is destroyed, resulting in poor products. Therefore, how to control the weld position and avoid the weld position from appearing on the finished product becomes a key technical problem in the field. Existing solutions exist to keep the weld away from the stamped area of the iron core piece by designing a special cutting path. For example, publication No. CN120155743a discloses a method and apparatus for connecting a material strip of a motor lamination, which is to plan a fold line formed by connecting a plurality of line segments end to end as a cutting path by detecting a flatness failure area (i.e., a waste area) formed by curling the head and the tail of a plate, so that each line segment of the path penetrates through the width of the plate and passes through the midpoint of the punching positions of two adjacent laminations, thereby ensuring that a weld seam does not fall on the position to be punched. The method effectively solves the problem of weld joint positioning, however, in the design of high-density and miniaturized iron core layout, in order to maximize the material utilization rate, the overlapping edges or gaps between stamping positions of adjacent iron core sheets are often designed to be very small, under the high-density layout, the pre-planned cutting and welding paths need to pass through or to be close to the extremely narrow areas, the shearing and tearing stresses born by the areas in the instant of punching are the most concentrated, the weak points with the highest risk of fracture failure are the most concentrated, and how to increase the welding strength of the iron core material belt weld joint so as to avoid the occurrence of fracture at the weld joint during punching is the problem to be solved at present. Therefore, there is a need to provide a new way to solve the above technical problems. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a laminated iron core production method, production equipment and a laminated iron core. The technical scheme of the invention is summarized as follows: A first object of the present invention is to provide a laminated core production method, in a cutting and welding process of a core material tape, comprising the steps of: Obtaining a blanking pattern of an iron core material belt and an initial cutting and welding path; Identifying localized reinforcement segments distributed along the initial cutoff path based on the blanking profile; determining the geometric style of the path segment corresponding to each local reinforcement segment to generate a target cutting and welding path; and cutting and welding the iron core material strips to be connected according to the target cutting and welding path. Preferably, the step of identifying the localized reinforcement segments distributed along the initial cutoff path based on the blanking pattern comprises: Determining easily broken risk points on the initial cutting and welding path according to the blanking pattern; identifying and marking welding strengthening points on the initial cutting and welding path based on each easy-to-break sub-risk point; a continuous path segment defined by adjacent weld strengthening points is determined as the localized strengthening segment. Preferably, the step of determining the easily broken risk point on the initial cutting and welding path according to the blanking pattern comprises the following steps: Obtaining the minimum clearance position between stamping positions of adjacent iron core chips on two sides of the initial cutting and welding path in the blanking pattern; and determining a vertical projection point of the minimum clearance position on the initial cutting and welding path as the easy-fracture risk point. Preferably, the step of identifying and marking the welding reinforcement point on the initial cut-and-weld path based on each of the frangible score risk points includes: Identifying path points meeting preset conditions to two sides