With the rapid development of Large Language Models (LLMs), the scarcity of high-quality Supervised Fine-Tuning (SFT) data emerges as a critical bottleneck restricting the improvement of model performance. Existing automated data synthesis methods face challenges such as domain semantic fragmentation, severe instruction homogeneity, and lack of interpretability in quality evaluation. In intelligent manufacturing and predictive maintenance scenarios, production scheduling, equipment condition monitoring, and maintenance decision-making are highly coupled. Complex mappings exist among sensor time-series data, failure modes, and downtime costs, imposing higher requirements on the cross-modal semantic representation and complex decision reasoning capabilities of instruction data. Hence, this paper proposes a full-cycle intelligent data construction framework, and an end-to-end system named IntelliData-Forge generates high-quality fine-tuning instruction datasets. First, this paper proposes an adaptive chunking algorithm based on structural entropy and semantic coherence for unstructured long documents, which incorporates a reinforcement learning strategy optimizer to maximize the preservation of contextual integrity. Second, this paper introduces an instruction evolution engine that uses a genetic algorithm integrated with MAP-Elites to achieve directional expansion within the complexity and topic spaces through multi-dimensional crossover and mutation operators. Finally, this paper constructs a multi-dimensional quality evaluation system based on Dempster-Shafer (DS) evidence theory, which utilizes the conflict coefficient K to quantify evaluation uncertainty and trigger an active learning mechanism, thereby achieving closed-loop monitoring of data quality. The experimental results demonstrate that IntelliData-Forge outperforms existing baseline methods across multiple key metrics, including RUL prediction error, fault classification accuracy, decision consistency, and instruction diversity. In particular, the RUL prediction error decreases significantly, while fault classification accuracy and decision consistency achieve substantial improvements.