English
Created on 09.14
Company News! Heavy-Duty Double-Bolt Clamp Machine Ready for Shipment
Boltless Hose Clamp Assembly Machine
Designed and Built by Xiamen Frand Intelligent Equipment Co., Ltd.
Product Overview
The Boltless Hose Clamp Assembly Machine is a fully automatic production system specifically engineered for the manufacturing of boltless (riveted) hose clamps — a widely used clamp type in which the band ends are joined by a point-welded rivet rather than a separate bolt and housing assembly.
This machine is designed and built by Xiamen Frand Intelligent Equipment Co., Ltd. and is suitable for the production of various sizes of boltless hose clamps — delivering versatile, high-speed, and consistent automated manufacturing from a single platform.
Core Capability — One Machine, Multiple Sizes
One of the key advantages of this machine is its exceptional size flexibility within a single platform:
- One machine accommodates 4 to 8 different clamp sizes — all within the same band width;
- Quick changeover — switching between sizes is achieved through programmable parameter adjustment and tooling reconfiguration, minimizing downtime between production runs;
- Reduced capital investment — instead of purchasing separate machines for each clamp size, a single machine covers a broad size range, maximizing equipment utilization and return on investment;
- Ideal for diverse product catalogs — manufacturers who produce a wide range of boltless clamp sizes for different applications can fulfill their entire production requirements from one machine.
Customer Collaboration — Testing With Your Own Materials
We understand that every customer has unique material specifications and quality standards. That is why Frand's testing and validation process is built around the customer's own materials and samples:
Step | Responsibility | Details |
Steel coil supply | Buyer | The buyer supplies steel coils (raw material) for machine adjustment, setup, and production testing |
Machine testing | Seller (Frand) | We use the buyer's own steel coils and sample clamps to test and validate the machine's performance |
Quality verification | Joint | Finished products are evaluated against the buyer's specifications to confirm that the machine meets all requirements |
This approach ensures that:
- The machine is tested with the exact material that will be used in production — not a substitute or generic test material;
- The buyer can verify the quality of finished clamps produced from their own steel — confirming that band hardness, surface finish, weld strength, and dimensional accuracy all meet their standards;
- Any adjustments needed to accommodate the buyer's specific material characteristics are identified and resolved before the machine ships — eliminating surprises during production startup.
Manufacturing Lead Time
Parameter | Details |
Manufacturing time | 3 – 4 months from order confirmation |
This timeline includes:
- Design finalization and engineering — confirming machine configuration, tooling specifications, and customization requirements based on the buyer's product specifications;
- Component procurement and fabrication — sourcing and machining all mechanical, electrical, and pneumatic components;
- Assembly and integration — building the machine, integrating all subsystems, and wiring the control systems;
- Internal testing and validation — running comprehensive factory acceptance tests using Frand's standard test materials;
- Customer material testing — once the buyer's steel coils arrive, conducting production trials with the customer's actual material to verify performance and quality;
- Final adjustments and preparation for shipment — completing any final tuning, documentation, and packaging for delivery.
We are committed to delivering every machine on schedule — and we keep our customers informed of progress at every stage of the manufacturing process.
The Assembly Process — Step by Step
The boltless hose clamp assembly process is a precisely orchestrated sequence of automated operations — transforming raw steel coil into finished, ready-to-use boltless hose clamps without any manual intervention.
Step 1: Steel Coil Feeding and Band Cutting
The production process begins with raw steel coil — the continuous strip of steel from which the clamp bands will be formed.
- The steel coil is loaded onto the machine's automated decoiler/feeder system;
- The strip is fed into the machine at a controlled, consistent rate;
- As the strip advances, it is precision-cut into individual band lengths — each cut to the exact length required for the specified clamp size;
- The cutting system ensures clean, burr-free cuts with consistent length accuracy across every band produced.
Step 2: Punching and Stamping — Band Forming
Once cut to length, each band undergoes a punching and stamping process to form the functional features required for the boltless clamp design:
- Punching — precise holes are punched into the band at designated positions, creating the slots and openings needed for the clamping mechanism;
- Stamping — the band is stamped to form embossed features, dimples, or other geometric characteristics that provide structural rigidity, locking engagement, or sealing surfaces;
- All punching and stamping operations are performed with precision tooling controlled by the machine's PLC system — ensuring consistent hole positioning, clean edges, and uniform feature geometry on every band.
Step 3: Edge Bending and Point Welding
This is the defining step of the boltless clamp assembly process — the step that gives this clamp type its name and its structural integrity.
- Edge bending — each side of the band is bent over (folded) to create the characteristic overlapping edge profile of a boltless clamp; the two ends of the band are positioned so that they overlap at the joint area;
- Medium-frequency point welding — the overlapping band ends are then point-welded using a medium-frequency welding system; this advanced welding technology delivers:
- Precise, controlled weld energy — medium-frequency welding provides accurate control of weld current, duration, and force, ensuring consistent weld quality on every clamp;
- Strong, reliable joints — the point weld creates a permanent mechanical connection between the overlapping band ends that withstands the full range of installation torque and operational clamping forces;
- Clean, minimal-spatter welds — medium-frequency welding produces clean weld joints with minimal spatter or distortion, preserving the band's surface finish and structural integrity;
- High-speed operation — the welding cycle is completed in fractions of a second, maintaining the machine's overall production speed.
The result: a continuous band loop with a strong, permanent welded joint — the structural foundation of the boltless hose clamp.
Step 4: Pre-Curling, Pressing, and Final Curling
With the band welded into a continuous loop, the machine proceeds to form the band into its final circular shape:
- Pre-curling — the welded band loop enters the pre-curling station, where it is gradually bent into a partial circular arc — this intermediate step ensures that the band transitions smoothly from its flat state into the final curved geometry without kinking, buckling, or introducing stress concentrations;
- Pressing to proper angle — the pre-curled band is then pressed to the precise angular profile required for the specified clamp size — this step sets the exact curvature and diameter that the final clamp will have;
- Final curling — the band is curled into its final circular shape — a complete, uniform ring with the correct internal diameter for the specified clamp size; the curling process is controlled with precision to ensure:
- Consistent roundness across every clamp produced;
- Correct internal diameter within tight tolerances;
- Smooth, uniform curvature without flat spots or irregularities;
- Proper alignment of the welded joint within the circular band.
Step 5: Finished Product Output
The final result: a complete, finished boltless hose clamp — fully formed, welded, and curled into its characteristic circular shape — emerges from the machine's output station.
Key characteristics of the finished product:
- No bolt — the clamp uses a welded joint rather than a separate bolt and housing assembly, giving it a clean, streamlined profile;
- Uniform circular geometry — precise curling ensures consistent internal diameter and roundness;
- Strong welded joint — the medium-frequency point weld provides a permanent, reliable connection between the band ends;
- Ready for use — the finished clamp requires no secondary operations and is ready for inspection, packaging, and shipment.
Technical Specifications Summary
Specification | Details |
Machine type | Boltless Hose Clamp Assembly Machine |
Clamp type produced | Boltless (riveted/welded) hose clamp |
Size flexibility | 4 – 8 different clamp sizes on one machine (same band width) |
Manufacturing lead time | 3 – 4 months from order confirmation |
Welding technology | Medium-frequency point welding |
Control system | PLC microcomputer with HMI touch-screen interface |
Material input | Steel coil (supplied by buyer for testing and production) |
Testing protocol | Machine tested using buyer's own steel coils and sample clamps |
Finished product | Boltless hose clamp — band cut, punched, stamped, edge-bent, point-welded, pre-curled, pressed, and curled into final circular shape |
Why Choose Frand's Boltless Hose Clamp Assembly Machine?
Advantage | Benefit |
Multi-size capability | Produce 4–8 clamp sizes on one machine — reducing capital investment and maximizing floor space efficiency |
Customer material testing | We test with your steel, your samples, your standards — ensuring the machine performs with your actual production material |
Advanced welding technology | Medium-frequency point welding delivers strong, clean, consistent welds on every clamp |
Full process automation | From coil feeding through finished product output — the entire process runs automatically |
Proven engineering | Designed and built by Frand, with over a decade of expertise in hose clamp assembly automation |
Customizable configuration | Machine parameters, tooling, and forming dies are configured to your specific clamp designs and size requirements |
Comprehensive after-sales support | One-year warranty, on-site technician support, and professional operator training included |
Ready to Get Started?
If you are looking for a fully automatic boltless hose clamp assembly machine that handles multiple sizes on a single platform, uses advanced medium-frequency welding technology, and is tested with your own materials before shipment — Frand has the solution.
Contact us today to discuss your boltless clamp production requirements, share your product samples, and learn more about how our machine can transform your manufacturing operation.
Xiamen Frand Intelligent Equipment Co., Ltd. — From coil to clamp. Fully automatic. Precision welded. Built for your success.
Contact
Leave your information and we will contact you.
WhatsApp
Email
Contact