Problem: Friction welding is the simplest way to join two metals. Fix one piece of metal and rotate another piece against it. As long as there is a gap between two metals, nothing will happen. But when two metals contact, the contact part will generate high heat, and the metals will begin to melt, and then the two metals can be welded together under a certain pressure. A factory needs to build a channel with each 10 meter cast iron pipe, and these cast iron pipes should be connected by friction welding. But to make such a big iron pipe rotate, it is necessary to build a very big machine and go through several workshops.
The process of solving this problem is as follows:
A) Minimum problem: Friction welding of cast iron pipes can be realized without major changes to existing equipment;
B) System contradiction: the pipe welding should be rotated, but not rotated, so as to avoid using large equipment;
C) Problem model: on the premise of not rotating the pipeline to be welded, a component in the existing system is changed to realize friction welding;
D) Analysis of position and resources: the position is the rotation of the pipeline, and the variable element is the contact part of two pipelines;
E) Ideal scheme: only rotate the contact part of the pipeline;
F) Physical contradiction: the integrity of the pipeline only limits the rotation of the contact part of the pipeline;
G) Elimination of physical contradictions and solutions to problems: Insert a short pipe between two long pipes, rotate the short pipe, and press the pipes together at the same time until they are welded.
Compared with traditional innovative methods such as trial and error and brainstorming, TRIZ theory has distinct characteristics and advantages. It successfully reveals the inherent laws and principles of innovation and invention, focusing on clarifying and emphasizing the contradictions existing in the system, rather than escaping contradictions, and its goal is to completely solve contradictions and obtain the final ideal solution, rather than compromise or compromise. Moreover, it is based on the evolution law of technology to study the whole design and development process, rather than random behavior. Practice has proved that the application of TRIZ theory can greatly accelerate the process of people's innovation and invention and obtain high-quality innovative products. It can help us to analyze the problem systematically and find out the essence or contradiction of the problem quickly. Can accurately determine the direction of problem exploration, and will not miss all possibilities. Moreover, it can help us break through thinking barriers, break the mindset, analyze problems with new eyes, think logically and illogically, predict the future development trend according to the law of technological evolution, and help us develop competitive new products. TRIZ theory was introduced into China only in recent years, but it has gradually attracted the attention of many domestic scientific research institutions, companies and experts.