Features & Process Advantages

What truly distinguishes this equipment from conventional necking machines is not a single feature, but an integrated system of design choices that collectively elevate performance, reliability, and operator convenience. Below we examine these features in detail.

1. True Synchronized Dual-End Forming

The most obvious advantage is the ability to process both tube ends simultaneously. However, synchronization is not merely about starting at the same time. The machine employs closed-loop position feedback via linear transducers on each hydraulic cylinder, comparing actual positions 2000 times per second. If one head advances even 0.01 mm ahead of the other, the proportional valve instantly adjusts flow to rebalance. This ensures that the tube experiences equal axial forces from both ends, preventing buckling or bowing—a common failure when using two independent single-head machines in tandem.

2. Progressive Multi-Stage Necking

A single large reduction—for example, shrinking a 50 mm tube to 35 mm in one pass—tends to create wrinkling on the inside radius and excessive wall thickening. Our machine supports programmable multi-stage necking, where the operator defines up to 4 intermediate diameters and corresponding feed rates. The controller automatically sequences these stages with brief dwell intervals, allowing the material to flow plastically rather than tear. This technique reduces scrap rates from typical 5–8 % down to under 1.5 % for challenging materials like 304 stainless steel.

3. Quick-Change Tooling System

Tooling changeover has historically been a major downtime contributor. We have addressed this with a patent-pending collar-lock system that secures the die using a single hexagonal nut rather than multiple bolts. With a dedicated spanner wrench, an operator can replace both left and right dies in under 5 minutes. Additionally, each die set is pre-aligned to a common centerline reference, so no time-consuming trial-and-error adjustments are needed after installation. For shops running frequent changeovers, we recommend purchasing a second tooling holder set to pre-mount dies offline, reducing changeover to under 2 minutes.

4. Recipe Management & Data Logging

The HMI stores not only process parameters but also tooling IDs, material grades, and operator initials. Each completed batch generates a production log, recording the exact settings used and any deviations flagged during the run. This feature is invaluable for ISO 9001 or IATF 16949 traceability requirements. Furthermore, the system allows exporting logs via USB or network to a central quality management database, eliminating manual data entry and transcription errors.

5. Automatic Lubrication & Condition Monitoring

Proper lubrication of guideways, slide blocks, and pivot points is critical for maintaining accuracy over long production runs. The machine includes a programmable automatic lubrication pump that dispenses measured grease doses to 12 individual points at preset intervals. A pressure sensor confirms each lubrication cycle and alerts the operator if any line is blocked. Simultaneously, the control system monitors hydraulic pump motor current, oil temperature, and tank level. If any parameter trends outside normal bounds, a predictive maintenance alert appears, allowing scheduled intervention before a breakdown occurs.

6. Anti-Wrinkle Pressure Control

During necking, the unsupported tube wall between the clamp and the die tends to collapse inward, forming wrinkles. To counteract this, our hydraulic circuit includes an independent axial pressure backup system that applies a counterforce through the tailstock. This pressure is automatically modulated based on the instantaneous forming force, effectively supporting the tube wall from inside. The result is a smooth, wrinkle-free internal surface without requiring a mandrel—a significant cost saving for tooling.

7. Energy-Saving Standby Mode

Hydraulic machines often waste energy during idle periods between cycles. This unit features an intelligent standby function that reduces pump motor speed to 30 % of rated RPM after 20 seconds of inactivity, cutting energy consumption by 65 %. When the operator places the next tube and presses the start button, the motor ramps back to full speed within 0.8 seconds, ensuring no delay in cycle start. Over a typical 8-hour shift with 60 % utilization, this translates to electricity savings of approximately 12–15 kWh.

8. Dual-Hand Safety Control

Operator safety is enforced through a dual-palm push-button system, requiring both hands to initiate the cycle. This prevents any possibility of reaching into the danger zone while the machine is in motion. Combined with the interlocked safety gate, the machine meets Category 3 safety performance level (PLd) per EN ISO 13849. For additional protection, a light curtain option is available for applications where the safety gate would interfere with loading automation.

9. Remote Diagnostic Port

Every machine is equipped with an Ethernet port that allows our service engineers—after obtaining your permission—to remotely log into the PLC and HMI for troubleshooting. This capability has reduced average resolution time for software-related issues from 3 days (requiring a site visit) to under 2 hours. No confidential production data is accessed; only machine status and parameter logs are reviewed.

10. Modular Expansion Ready

The control cabinet includes spare I/O terminals for future add-ons: an automatic loading hopper, an in-line gauging station, or a robotic arm interface. This means the machine can grow with your production needs rather than becoming obsolete. Many customers who initially purchase a standalone unit later integrate it into a fully automated cell without needing to replace the core machine.

Collectively, these features transform the Dual Side Swaging Unit from a simple forming press into a smart manufacturing asset. It does not just form tubes—it collects data, prevents defects, saves energy, and adapts to changing demands.