Electrical Engineering

Wen-Ren Yang1 and Chau-Shing Wang This email address is being protected from spambots. You need JavaScript enabled to view it.1

1Department of Electrical Engineering, National Changhua University of Education, Changhua, Taiwan 500, R.O.C.

 

Received: August 15, 2009
Accepted: October 7, 2010
Publication Date: March 1, 2011

Download Citation: ||https://doi.org/10.6180/jase.2011.14.1.05  


ABSTRACT

This study aims to calculate the resistance spot welding current digitally at a fast speed. The conventional open-loop spot welding machine cannot measure the current, thus the welding quality varies. The welding time of spot welder is very short, but the welding current is strong and it is hard to be measured, thereby resulting in the uncontrollability of welding quality. This study uses a high speed, low price and high-performance 32-bit ADSP21065 SHARC digital signal processor (DSP) as the core to measure the welding current in real time. The experimental results are compared with the commercial welding current meter to prove that the proposed method can quickly and accurately calculate the welding current.


Keywords: Resistance Spot Welder, Welding Current, Digital Signal Processor, Current Measurement


REFERENCES

  1. [1] Chen, Z., Shi, Y. and Zha, H., “Evaluating Technology of Spot Weld Quality for Coated High Strength Steel Sheet Based on Ultrasonic Guide Wave,” IEEE Ultrasonics Symposium, pp. 406409 (2008).
  2. [2] Chen, X. and Araki, K., “Fuzzy Adaptive Process Control of Resistance Spot Welding with a Current Reference Model,” IEEE International Conference on Intelligent Processing Systems, pp. 190194 (1997).
  3. [3] Chen, W.-T., Chen, T.-R., Chuo, F.-P., Lin, T.-P. and Chen, L.-S., “Analysis of Power Control for Resistance Spot Welding Machine,” 2004 Taiwan Power Electronics Conference, pp. 955960.
  4. [4] Lai, X., Zhang, X., Zhang, Y. and Chen, G., “Weld Quality Inspection Based on Online Measured Indentation from Servo Encoder in Resistance Spot Welding,” IEEE Transactions on Instrumentation and Measurement, Vol. 56, pp. 15011505 (2007).
  5. [5] Zhang, X., Zhang, Y. and Chen, G., “Weld Quality Inspection Based on On-line Measured Indentation from Servo Encoder in Resistance Spot Welding,” IEEE Instrumentation and Measurement Technology Conference, pp. 13531356 (2006).
  6. [6] Niu, B., Chi, Y. and Zhang, H., “Electrode Clamping Force Regulation of Servo Gun Mounted on Resistance Spot Welding Robot,” IEEE/ASME International Conference on Advanced Intelligent Mechatronics, pp. 576582 (2008).
  7. [7] Klopcic, B., Dolinar, D. and Ctumberger, G., “Advanced Control of a Resistance Spot Welding System,” IEEE Transactions on Power Electronics, Vol. l, pp. 144152 (2008).

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