The thermal-magnetic assembly is the key protection unit in circuit breakers and motor protectors, enabling overload and short-circuit tripping. Its performance makes assembly efficiency and reliability critical. Our fully automated line integrates auto-feeding, welding, and in-process inspection, achieving a cycle time under 4 seconds and greatly boosting product quality and output.
Key Processes
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Automatic feeding with compatibility for multiple materials
Insertion mechanism ensures excellent synchronization and efficiency
Various welding processes (optional), such as resistance welding, argon arc
welding, and induction welding, with welding parameter monitoring
Product Features
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Independently developed key process hardware.
Standardized and modularized production line framework and key processes, optimized layout for ease of maintenance.
High equipment efficiency with a cycle time of less than 4 seconds.
Reliable design with high stability and product yield.
Alarm indications during the process guide maintenance personnel directly to specific stations for quick inspection and troubleshooting.
Universal and visual software operation platform.
Comprehensive MES integration, clearly displaying process data (e.g., CT, OEE, FPY, OUTPUT, etc.), and capable of interfacing with factory-level MES.
MCB Thermal Trip Automation Welding Lines
Machine A.Bimetallic Hot Riveting Welding Equipment
Step1.Loading Components
Component feeding is a key pre-process in automated MCB assembly, directly impacting performance and efficiency.
1.Moving Contact:
Ensures precise alignment with fixed contacts for reliable switching and stable arc control.
2.Thermal Rivet Parts:
Provide a stable base for riveting, improving structural strength and long-term reliability.
3.Bimetal Strip:
Enables accurate installation of the overload sensing element for precise thermal tripping.
4.Torsion Spring:
Supplies stable reset torque for fast recovery after tripping and longer service life.
5.Copper Wire:
Ensures secure electrical connections, reduces contact resistance, and enhances safety.
Dual-component welding is a key process in MCB core assembly, forming stable electrical and mechanical connections that determine conductivity, protection sensitivity, and durability.
1.Copper Wire + Moving Contact: Creates a low-resistance connection for stable current flow, reducing overheating and arc erosion.
2.Bimetal Strip + Copper Wire: Ensures reliable current flow through the bimetal for accurate thermal sensing and overload tripping.
3.Moving Contact + Bimetal: Enhances mechanical strength and electrical continuity, preventing loosening during operation.
4.Moving Contact + Bimetal Positioning (with Thermal Rivet): Ensures precise alignment as a basis for accurate welding and assembly.
5.Thermal Rivet + Moving Contact: Secures the final structure, improving mechanical stability and long-term reliability.
connecting tab welding equipment fuses these three components
into a Thermal system assembly
MCB Thermal Trip Automation Welding Line
Machine E.Pendulum Device
The palletizing device features a built-in robotic arm.
Its gripper can precisely, efficiently, and flexibly pick and place welded thermal system components,
securely positioning them into the storage tray in a neat and orderly manner.
This helps reduce manual placement errors and improves production efficiency.
We believe that through our manufacturing strengths and service commitment, we are able to provide our customers with superior products and an unparalleled service experience.
