The "Critical Link" in Electric Compressor Assembly: Stator Hot Sleeving Press-Fitting Process
The "Critical Link" in Electric Compressor Assembly: Stator Hot Sleeving Press-Fitting Process
Recent winter tests conducted by multiple authoritative media outlets reveal that measuring range solely by battery capacity is no longer accurate. The vehicle's thermal management capability is becoming a key factor influencing range performance and driving comfort .Systems such as the heat pump, cooling circuits, and cooling/heating efficiency need to work in synergy. As a core component, the performance and assembly quality of the electric compressor are crucial to the system's thermal management efficiency and reliability .Principle of Stator Hot Sleeving ProcessIn the assembly process of an electric compressor, stator hot sleeving is typically the initial and critical step. Its principle involves briefly heating the housing (approximately 20 seconds, subject to process validation), utilizing metal's thermal expansion and contraction to slightly expand the inner diameter, creating an assembly gap for pressing the stator in .After the housing returns to ambient temperature, an interference fit forms a stable bonding force. This not only enhances concentricity and structural rigidity but also optimizes the heat conduction path and suppresses vibration, laying a solid foundation for the compressor's efficiency and lifespan under hot and cold cycling conditions ."Visual Assembly" in High-Precision Servo PressesThe press-fitting step following hot sleeving relies on high-precision servo presses .Servo presses can monitor and record the press-fitting force-displacement curve throughout the process. They provide timely alarms or stops when the curve deviates from the set window, avoiding potential issues such as scratching, eccentric pressing, or insufficient insertion .Simultaneously, based on the housing temperature and actual expansion amount, they can dynamically adjust the insulation/heating time and press-fitting speed, ensuring process window stability and improving first-pass yield and batch consistency .Thermal management is becoming a core competitiveness of new energy vehicles. Assembly processes, represented by stator hot sleeving, achieve high-quality interference fits through metal's thermal expansion and contraction, establishing a solid foundation for the efficiency, reliability, and longevity of electric compressors .The visualization and adaptive control of high-precision servo presses upgrade assembly from experience-driven to data-driven, ensuring a controlled process, traceable results, and optimizable cycle times. The dual drive of process and equipment ultimately translates into a perceptible upgrade in vehicle winter performance and the sustained leading edge of enterprise manufacturing competitiveness .
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Leetx specializes in the field of intelligent assembly, providing comprehensive solutions for manufacturing processes. Its business covers the entire process of R&D, production, and sales of high-end manufacturing assembly products. Its product portfolio includes tightening systems, automatic screw feeding systems, servo press-fitting systems, etc., widely used in industries such as automotive vehicle manufacturing, automotive components, aviation, 3C electronics, rail transportation, and engineering machinery. With mature solutions in assembly connection technologies like tightening, press-fitting, and screw feeding, Leetx is committed to being a significant force driving the advancement of high-end manufacturing.
