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Auto-Feeding MFDC Projection Welder for Piston Rod Ring Assembly
Heavy-Duty MFDC Projection Welding Workstation with Dual-Path Rod and Ring Auto-Feeding — Servo Force Control, 40-250KVA, Galvanized and Stainless Steel Capable
Feeding
Dual-Path Rod + Ring
Force Control
Servo / Proportional
Power
40 - 250 KVA
Application
Piston Rod Retaining Rings
Why Piston Rod Ring Welding Demands Precision Force Control
Automotive piston rod assemblies present a unique welding challenge: the retaining ring must be projection-welded onto the rod with sufficient strength to withstand millions of load cycles in service, yet the heat input and electrode force must be precisely controlled to avoid distorting the precision-ground rod surface. A single over-pressurised weld can scrap a machined rod worth significantly more than the welding operation itself.
This Xinwei MFDC projection welding workstation solves the problem through three integrated systems. The dual-path automatic feeding system independently delivers rods and rings to the welding position. The servo or proportional valve force control system maintains the exact programmed electrode force throughout each weld cycle, compensating for part tolerances. The MFDC power source provides concentrated heat input with minimal spatter, protecting the rod surface finish while ensuring full-strength projection weld nuggets on galvanized and stainless steel materials.
Key Engineering Features
1. Dual-Path Independent Feeding: Rods and Rings Delivered in Sync
The system features two separate automatic feeding paths: one for piston rods and one for retaining rings. Each path independently singulates and positions its component. The synchronised delivery ensures that both parts arrive at the welding fixture in the correct orientation and sequence, ready for the projection welding cycle. This eliminates the manual coordination step that creates bottlenecks in semi-automatic stations.
2. Servo or Proportional Valve Force Control: Protecting Precision Surfaces
Unlike pneumatic-only systems where force can vary with air supply pressure, the servo or proportional valve system maintains closed-loop force control. The electrode applies exactly the programmed force, no more. This is critical for piston rods where the ground surface must remain undamaged. The system compensates for minor part thickness variations without exceeding the safe force window.
3. MFDC with Concentrated Heat Input: Strong Welds, Clean Surfaces
The Medium Frequency Direct Current power source (40-250KVA) delivers a precisely controlled waveform that concentrates heat at the projection contact points. This creates full-strength weld nuggets while minimising the heat-affected zone. For galvanized sheet components, the controlled heat input prevents excessive zinc burn-off that can compromise corrosion resistance. The result is a strong projection weld with a clean surrounding surface.
4. Complete Workstation: Integrated Feeding, Welding, and Quality Control
The 2600mm-long workstation integrates feeding, welding, and optional inspection into a single production cell. The intelligent HMI provides production monitoring, recipe management for different rod/ring combinations, and fault diagnostics. This turnkey approach means the cell can be deployed on the production floor with minimal integration engineering on the customer side.
Application Focus: Automotive Suspension and Steering Components
This workstation is purpose-engineered for the projection welding of piston rods to retaining rings in automotive suspension (shock absorbers, struts) and steering system components. The dual-path feeding, precision force control, and MFDC technology directly address the quality and throughput requirements of Tier-1 and Tier-2 automotive suppliers producing these safety-critical assemblies.
Technical Specifications
Parameter
Specification
Rated Capacity
40 - 250 KVA
Input Voltage
220V / 380V / 415V (3-phase)
Duty Cycle
50%
Welding Technology
MFDC Inverter (Medium Frequency DC)
Force Control
Servo or proportional valve (closed-loop)
Feeding System
Dual-path automatic: rods + rings
Welding Materials
Carbon Steel, Stainless Steel, Galvanized
Dimensions
2600 x 1600 x 1900mm
Weight
1900kg
Warranty
1 Year
Certifications
CE, RoHS, ISO
Ready to Upgrade Your Piston Rod Assembly Line?
Send us your piston rod and retaining ring samples for a free welding test with process parameter documentation.
Joe@xwweld.com | +86-13378111895
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2003
Total Annual:
$35000000-$50000000
Employee Number:
70~95
Ecer Certification:
Verified Supplier
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