Rotor Commutator Butt Welding Machine for Automotive Tailgate Motor Copper Wires

The rotor is the heart of a tailgate motor, and the copper-wire-to-commutator joint is the step where its quality is decided. For a manufacturer of new energy vehicle and automotive components, PDKJ built a customized rotor commutator welding machine - automatic positioning, clamping, rotation and butt welding in one continuous sequence. The machine has completed installation and commissioning and is producing in the customer's workshop, welding copper wires on rear tailgate motors.

Application Overview

Customer Welding Requirements

Customer Background

The customer develops and manufactures new energy vehicle and automotive components, with products used in electric drive systems, motors and intelligent vehicle applications. Rotor welding is a key operation in their motor production, directly tied to product performance.

Project Background

As demand grew, the customer wanted to upgrade the tailgate motor production process with automation - raising welding efficiency while guaranteeing weld quality and part-to-part consistency for batch manufacturing. After detailed communication and product evaluation, PDKJ tailored this rotor commutator welding solution to the workpiece and the process.

Pain Points and Requirements

Three requirements came up repeatedly during project discussions, and they define what the machine had to deliver:

• Stable weld quality. The copper wire to commutator joint is a critical process: the customer needed stable output from the equipment so quality no longer fluctuated with human factors.
• Continuous multi-point welding. One rotor needs several welds. Doing them one by one with manual adjustment is slow and puts consistency at risk - the machine had to weld continuously around the part.
• Fast product changeover. The customer runs several rotor specifications, so the machine had to switch models quickly with minimal stoppage.

The Rotor Commutator Butt Welding Machine

The machine combines automatic positioning, clamping, rotation and butt welding into one sequence built around the rotor's geometry:

Manual load and position -> Two-hand start -> Pneumatic clamping -> Pressure applied and butt weld completed -> Automatic rotation to the next joint -> Cycle repeats -> Automatic release and unload

The rotor commutator butt welding machine installed in the customer's workshop.

1. Consistent welds, position by position. Pneumatic clamping and the automatic rotation mechanism put every weld point exactly where the program sets it, removing manual positioning error from the loop.

2. A cycle built for batch output. The standard welding cycle is 30 seconds or less per rotor, with output up 25% over the previous equipment. At start-up the machine supports an adjustable 5-piece pre-weld program that stabilizes the electrode condition before production welding begins.

Operating position with the rotor tray: the operator loads parts while the machine handles clamping, rotation and welding.

1. Changeover by program and fixture, not by re-engineering. Welding parameters support multiple stored product programs recalled with one touch, and different rotor specifications switch by exchanging the corresponding positioning fixture - raising equipment utilization across the product range.

2. Automation with safety built in. Clamping, positioning, rotation and welding run automatically, cutting manual effort, while the safety light curtain, two-hand start and three-color warning tower protect the operator throughout the cycle.

How the Machine Solves the Customer's Pain Points

1. Quality stops depending on the operator's hands.. Programmed positions and controlled pressure make the joint repeatable shift after shift.

2. Multi-point welding runs as one continuous sequence.. Automatic rotation between joints replaces manual re-adjustment, protecting both speed and consistency.

3. Model changes take minutes, not hours.. Stored programs plus interchangeable fixtures keep changeover downtime off the production plan.

4. The pre-weld program protects the first pieces.. The adjustable 5-piece pre-weld routine brings the electrodes to a stable state before real production parts are welded.

Why Choose a Customized Commutator Welding Machine?

A rotor couples many small joints with tight position requirements - exactly the case where a general-purpose machine falls short. Building the clamping, rotation and butt welding sequence around the actual commutator is what turns welding from a skilled manual job into a stable production process.

Key Advantages

• Automatic clamp, rotate, weld and release sequence for multi-joint rotors.
• Welding cycle of 30 s or less with output up 25% versus the previous equipment.
• Adjustable 5-piece pre-weld program stabilizing electrode condition at start-up.
• Multi-program storage with one-touch recall; fixture-based model changeover.
• Safety light curtain, two-hand start and three-color warning tower as standard.

Potential Applications

The same solution pattern covers other wound-armature work: micro motor rotors, pump motors, blower motors, power tool motors and similar copper-wire-to-commutator joints in automotive and appliance manufacturing.

Delivery and Support

The standard delivery cycle was 60 working days, with rotor sample welding completed before shipment. After arrival, PDKJ engineers completed on-site installation and commissioning, ran hands-on training for the operators, and optimized the welding parameters together with the customer's team. The machine has been running stably since, with multiple batches of motor copper wire welding completed on it.

The machine's position in the customer's motor assembly workshop.

PDKJ continues to provide customized laser welding and resistance welding solutions based on different materials, workpiece structures, welding requirements, and production applications.

Related Products

• Capacitor Discharge (convex) Spot Welding Machine
• Medium Frequency Row Spot Welding Machine
• Double Head Spot Welding Machine
• DTB-80 Industrial Vertical Medium Frequency Inverter Spot Welder
• Platform Type Intermediate-Frequency Inverter Seamless Spot Welding Machine

Contact PDKJ

Welding copper wires onto commutators or other motor joints? Send us the part details - PDKJ will design the clamping, rotation and welding sequence around your rotor, with sample welding before shipment.

WhatsApp: +86 136 1279 3248

Email: pdkj101@gd-pw.com

Website: https://www.spotlaserwelding.com/contactus.html

Address: 1-2F, Building 3, Qichen Industrial Park, No. 26 Luxi 1st Road, Liaobu Town, Dongguan City, Guangdong Province, China

Guangdong Pudian Automation Technology Co., Ltd (PDKJ) - 20 years in resistance spot welding machines, laser welding machines and automated welding equipment.