The pressure setting of a riveting machine is not fixed; it depends on the hydraulic system capacity, rivet material, diameter, and workpiece thickness. Proper pressure and commissioning procedures are key to ensuring riveting quality and equipment longevity.
I. Pressure Setting Reference
General pressure range: Typical operating pressures range from 10 MPa to 30 MPa. Small machines are often set at 10–15 MPa, while large units require 20–30 MPa.
Hydraulic system output: Factory default oil pump upper limits are usually 2.5 MPa; for prolonged batch production, it is recommended to keep pressure around 2.0 MPa to extend seal life.
Selection by rivet diameter: Different diameters require different riveting forces (reference values):
φ5 mm → approx. 8.5 kN
φ8 mm → approx. 13 kN
φ16 mm → approx. 34 kN
φ20 mm → approx. 65 kN
φ30 mm → approx. 100 kN
In practice, adjustments should also consider material hardness (e.g., aluminum, steel, stainless steel). Based on customer‑provided drawings and batch requirements, we can help calculate the required riveting force and recommend suitable machine models along with compatible tooling solutions.
II. Commissioning Methods and Parameter Settings
Pre‑commissioning preparation
Ensure the machine is firmly installed, free from external vibration.
Check hydraulic oil level, pipeline connections, and electrical wiring.
Operational observation
Run the machine unloaded, observe speed, pressure gauge readings, and temperature changes, and confirm no abnormal noise or leakage.
Core parameter adjustments
Pressure regulation: Set pressure according to rivet material and diameter. Too low pressure causes loose rivets; too high may damage the rivet or workpiece surface. Start from a lower value and gradually increase until the form is fully shaped.
Hold time: Typically 0.5–3 seconds, depending on rivet size and shape. Insufficient time fails to fully deform the rivet; excessive time may crush the material.
Tool angle: Select or grind the appropriate angle for different rivet head types (round, countersunk, flat) to ensure even load distribution.
Temperature control: During continuous operation, hydraulic oil temperature should be maintained between 45–55°C. If it rises too high, stop for cooling or add a heat exchanger.
Safety precautions
Never touch the rivet head or workpiece while the machine is running.
Regularly calibrate pressure sensors and limit switches; correct deviations promptly.
Use rivets that meet specifications; avoid overloading the equipment with unsuitable fasteners. For special materials or non‑standard rivets, we can custom‑engineer dedicated tools and locating fixtures to ensure one‑time successful commissioning.
By following these standardized settings and procedures, consistent riveting quality and reliable machine operation can be achieved. It is recommended that operators record all adjusted parameters to create standardized work instructions for future reference.
