Mario Carnaghi S.p.A: Forger of the Soul of Master Craftsmen, Jointly Expanding the Frontiers of Extra-Large Precision Manufacturing

In Lombardy, Italy, in the 1950s, the wave of post-war reconstruction spawned an urgent demand for extra-large industrial equipment. The Mario Carnaghi family, with three generations of inherited heavy machine tool manufacturing skills, became forgers of Europe's industrial backbone. However, when the turbine rotor diameter of a new hydropower station exceeded five meters, traditional craftsmanship encountered an unprecedented challenge: how to carve micron-level precision on a giant?

At that time, the gantry milling machine Carnaghi built for the project could carry 100-ton workpieces, but its machining precision fluctuated day and night due to structural thermal deformation. This "steel breathing" phenomenon caused the cylindricity error of key components to exceed the allowable value by three times, halting the progress of the entire hydropower station. For Carnaghi, which prided itself as an "industrial master," this was not only a technical dilemma but also a severe test of family honor.

While Italian engineers struggled with the thermodynamic labyrinth, the HMS team brought inspiration from the Alpine peaks: "Can we teach steel to perceive temperature?" This poetic question gave birth to the revolutionary "Environmentally Adaptive Compensation System." In the workshop on the outskirts of Milan, the two parties implanted a network of precision sensors into the "meridians" of the machine tool's frame, achieving real-time perception of steel thermal deformation for the first time. They also creatively scaled up the temperature compensation principle of Swiss watches a thousandfold, realizing dynamic deformation offset through a hydraulic fine-tuning mechanism.

The ingenuity of this system lay in: it did not resist the natural properties of materials, but guided their energy like taming a wild horse. When the first batch of compensated turbine rotors passed acceptance, with fluctuations on their five-meter-diameter machining surface no thicker than a hair, people witnessed not only a technical miracle but also a reconciliation between human wisdom and the nature of materials.

HMS’s Insight:True industrial epics are born from profound dialogue with the nature of materials.

We have always believed that the greatest manufacturing art lies in embracing the real pulse of the physical world with precise wisdom.

When your equipment faces the ultimate game between size and precision, what kind of partner do you need? We look forward to exploring the philosophical realm of extra-large precision manufacturing with you.