In precision assembly scenarios, many companies encounter this problem: the target torque is lower than the lower range limit of the torque-controlled nutrunner. Working in the standard torque mode makes precise operation impossible, and problems like incomplete seating (floating screws) or over-tightening easily occur. In fact, without changing the tool, you can efficiently complete precise low-torque tightening operations by using the angle control torque monitoring mode (angle method) combined with the Danikor intelligent torque-controlled nutrunner.

I. Core Pain Point: The Dilemma of Low Torque Below the Nutrunner's Range Limit

Standard torque-controlled nutrunners rely on single torque control. When the target torque is below the tool's lower range limit, two major problems arise:

• Accuracy Failure: Below the lower range limit, the accuracy of the torque sensor decreases significantly, making it impossible to stably output the target torque. This easily leads to defects such as torque deviation or stripped threads.

• Process Limitation: Forcing the operation leads to insufficient clamping force and loose product connections. If the tightening force is controlled manually, it results in poor batch-to-batch consistency, affecting product reliability.

In this situation, directly replacing the nutrunner with a smaller-range model increases equipment costs and cannot adapt to jobs with multiple screw specifications. However, the torque-angle control strategy of the Danikor intelligent torque-controlled nutrunner precisely solves this industry problem.

II. Solution: The Angle Method – The Preferred Solution for Low-Torque Tightening

1. Working Principle

First, tighten the screw to a start torque (40%~60% of the target torque). At this point, the screw enters the elastic deformation zone, the threads fit closely, and there is no plastic deformation. Then, starting from this point, rotate the screw by a preset fixed angle. The elastic elongation of the bolt generates a stable axial clamping force, eliminating the influence of frictional resistance on the clamping force and achieving precise control at low torque.

2. Advantages

• Overcomes Range Limitations: Does not rely on the torque-controlled nutrunner's lower torque range limit. Accurately outputs low-torque clamping force through angle control.

• Widely Applicable Scenarios: Suitable for assembly scenarios such as 3C electronics (Computer, Communication, Consumer Electronics), automotive electronics, and new energy battery packs.

As a brand deeply involved in the field of automated assembly, the Danikor intelligent torque-controlled nutrunner is equipped with high-precision sensing and intelligent algorithms, supporting multiple tightening strategies including the angle method.

1. Core Technology Support

• Dual-Parameter Precision Monitoring: Equipped with a high-precision torque sensor and angle encoder, achieving full-range torque accuracy of 6σ ±5%. It collects torque and angle data in real-time simultaneously, dynamically managing the tightening process.

• Flexible Multi-Mode Switching: Features built-in multiple tightening programs such as torque control, angle control, and torque-angle combined control. Switch to angle method mode with one click to adapt to low-torque, out-of-range operations.

• Intelligent Error Prevention and Alarm: Monitors the tightening curve in real-time. When abnormalities such as incomplete seating (floating lock), stripped threads, or torque exceedance occur, it immediately alarms and records the data, preventing defective products from moving to the next process.

Conclusion

When the target torque is lower than the torque-controlled nutrunner's lower range limit, screws can still be driven normally. The angle method is an efficient, low-cost solution. With its mature torque-angle combined control technology, the Danikor intelligent torque-controlled nutrunner overcomes range limitations, ensures low-torque tightening accuracy and batch consistency, and helps enterprises improve quality and efficiency in precision assembly scenarios.