The Core Secret to Precision Control: Application of Magnetostrictive Displacement Sensors in Powder Compacting Hydraulic Presses

Powder compacting hydraulic presses are specialized equipment for forming powder materials into components of required shapes. They compact ore powder, metal powder, feed powder and other materials via molds, similar to pressing biscuits in a mold. However, such equipment can deliver pressing force ranging from hundreds to thousands of tons, producing finished parts with uniform density and ultra-high dimensional precision. Components ranging from miniature smartphone parts to large construction machinery components rely on its precise forming capability. Accurate molding is realized with technical support from Zheda Jingyi (TEC) magnetostrictive displacement sensors.

A powder compacting hydraulic press generally consists of three major assemblies: main machine, hydraulic system and electric control system, interconnected via pipelines and electrical devices to form an integrated unit. The main machine bears enormous pressure without deformation, serving as the foundation for stable forming. The hydraulic system acts as the power core, supplying massive thrust required for compaction through high-pressure oil. The electric control system functions as the central brain, coordinating all components and precisely regulating pressure, speed and displacement.

Application of Zheda Jingyi (TEC) Magnetostrictive Displacement Sensors in Powder Compacting Hydraulic Presses

Figure 1: Powder Compacting Hydraulic Press

Precise displacement measurement is critical for qualified products manufactured by powder compacting presses. Minor position deviation may lead to uneven part density, out-of-tolerance dimensions, or even damage to expensive molds. As high-precision, non-contact displacement measuring equipment, Zheda Jingyi (TEC) magnetostrictive displacement sensors serve as the core component to tackle such challenges.

Typically, Zheda Jingyi (TEC) magnetostrictive displacement sensors are installed inside hydraulic cylinders. Through non-contact measurement of the propagation time of magnetostrictive waves within the waveguide wire, the sensor measures the downward and return positions of the hydraulic cylinder piston rod in real time and accurately. Its maximum resolution reaches 0.1 μm, enabling capture of micrometer-scale displacement variations. Displacement data is transmitted to the control system continuously. Once displacement deviation from the set value is detected, the system immediately adjusts the pressure and speed of the hydraulic system to ensure consistent precision for every pressing cycle, thereby guaranteeing reliable operation of the powder compacting hydraulic press.

Thanks to the adoption of magnetostrictive displacement sensors, high-precision displacement monitoring solutions are available for automated and precision manufacturing equipment such as powder compacting hydraulic presses in high-end manufacturing sectors. For a long period, high-precision magnetostrictive displacement sensors were monopolized by international brands. Nowadays, domestic manufacturers represented by Zheda Jingyi (TEC) are achieving breakthroughs in this field. Drawing on more than 30 years of technological accumulation, Zheda Jingyi (TEC) has successfully developed multiple displacement sensor models covering four series: R Series, M Series, E Series and Y Series. Their performance is comparable to top international brands, realizing import substitution.

Compared with imported overseas products, Zheda Jingyi (TEC) delivers obvious advantages in pricing and service: shorter delivery cycles and rapid after-sales response. It helps customers substantially cut procurement and maintenance costs, shorten supply chain lead time and reduce implicit time losses caused by waiting for imported spare parts.

Figure 2: TEC Magnetostrictive Displacement Sensor

These sensors are not only applicable to powder compacting hydraulic presses, but also play vital roles in numerous high-precision scenarios including metallurgical rolling mills, hydraulic cylinders, energy equipment, medical laboratories and more. As domestic high-end sensor manufacturers represented by Zheda Jingyi (TEC) achieve continuous technological maturity and wider adoption, we believe manufacturing enterprises now have access to alternatives featuring outstanding performance, optimized costs and faster service response when pursuing high precision and reliability.

We will not rest on our achievements in the future. Faced with the ongoing trend toward intelligent and precision-driven manufacturing, we will keep increasing R&D investment and strive to develop displacement sensing solutions with higher precision, stronger environmental adaptability and greater intelligence.