MDSC‑8000S Application Case | Anti‑overlap Detection for Robot Feeding in Automotive Component Welding Line

I. Project Background

An automotive parts manufacturer specializes in the welding production of automotive body structural parts. Its production line adopts an automatic manipulator feeding mode, with the core processing material being steel plates with a thickness of 0.8–1.5 mm. In the welding process, accurate single-sheet feeding of steel plates is a critical prerequisite for ensuring welding quality.

However, in actual production, issues such as oil contamination and electrostatic adsorption on the steel plate surface often cause the manipulator to grab overlapping double or multiple sheets during the feeding process. Once overlapping plates enter the welding station, a series of production problems arise:

1. The welding current cannot penetrate multiple layers, resulting in incomplete welding, false welding, and a sharp increase in defective products.

2. The thickness of overlapping plates exceeds the adaptation range of welding fixtures, causing fixture wear, positioning deviation of welding robots, and even damage to core equipment such as welding torches in severe cases.

3. Manual inspection and removal of overlapping plates require production downtime, reducing the automation efficiency of the production line and increasing labor costs.

To resolve this production pain point, the enterprise needs to equip a high-precision, high-response anti-overlap detection solution for sheet feeding, to realize real-time single/double-sheet detection before welding.

II. Demand Analysis

1. Detection Accuracy: Accurately identify single and double sheets of steel plates with a thickness of 0.8–1.5 mm.

2. Adaptation to Automated Production Lines: The detection equipment must be seamlessly integrated with the manipulator feeding process, with fast response to match the high-speed production rhythm without affecting cycle time.

3. Easy Installation: The equipment must feature a compact structure for easy integration on the manipulator or feeding station, without large-scale modification of the existing production line.

III. Solution

After in-depth communication with the customer and on-site testing, ATONM engineers finalized the ATOM Single-Probe Double-Sheet Detector MDSC-8000S as the core detection device, building an anti-overlap detection system for welding feeding in automotive parts manufacturing.

(I) Core Advantages of the Equipment

1. Precise Adaptation to Thickness Range

Designed for magnetic metals, the MDSC-8000S single-probe double-sheet detector detects materials from 0.2 to 4.0 mm thick. Equipped with a dedicated detection probe, it uses the electromagnetic induction principle to capture inductance differences between single and double steel plates, achieving accurate single/double-sheet identification.

2. Single-Side Installation for Line Layout

The single-probe design eliminates the need for through-beam installation. It can be directly integrated on the manipulator feeding fixture without modifying the existing mechanical structure, greatly reducing installation and reconstruction costs while saving production line space.

3. Excellent Anti-Interference Performance

Built with Atonm’s proprietary MultisCom optimization algorithm and anti-interference circuit design, it effectively filters interference from factory electromagnetic noise, oil contamination, and other factors, ensuring stable and reliable detection in complex industrial environments.

4. Fast Response for Production Cycle

With a high response speed of up to 200 pcs/min, it meets the demands of high-speed production lines. Detection results are fed back to the manipulator control system in real time, enabling seamless “detection-judgment-execution” and avoiding efficiency losses from detection delays.

5. Intelligent Adaptation to Multiple Materials

Supports detection of various magnetic metals including steel, iron, and galvanized steel. With a self-learning function, it requires no manual thickness setting and can be commissioned in only 4 steps.

Equipped with a MODBUS RTU 485 communication module, it allows quick parameter switching via recipe settings, adapting to the enterprise’s multi-category parts production.

(II) System Workflow

1. Feeding Triggers Detection: When the manipulator grabs the steel plate and moves it to the welding feeding station, the MDSC-8000S detector is activated, and the probe scans the plate in real time.

2. Signal Analysis and Judgment: The detector collects inductance signals via eddy current induction and analyzes signal characteristics through the built-in algorithm to determine whether the grabbed plate is single or double.

3. Signal Output and Execution

 - If judged as a single sheet, the detector sends a “PASS” signal to the manipulator control system, and the welding process starts.

 - If judged as double or more sheets, the detector immediately outputs an “OVERLAP” alarm signal, triggering a buzzer and indicator light. The manipulator pauses operation upon receiving the signal, transfers the overlapping plates to the scrap or manual handling area, and resumes production after the fault is resolved.

IV. Project Summary

By introducing the Atonm contact-type single-probe double-sheet detector MDSC-8000S, this project solves the industry pain point of overlapping steel plate feeding in automotive parts welding production lines.

The solution delivers not only high-precision and high-stability detection performance but also easy installation and strong adaptability. It improves product quality and production efficiency while reducing equipment operation and maintenance costs, providing a replicable application model for the automation and intelligent upgrading of automotive parts manufacturers.