The DF-YN25 is specifically engineered for internal hole grinding of miniature precision components, such as elastic collets, ceramic guide sleeves, and ceramic oil nozzles. It breaks away from conventional rigid clamping methods by employing a unique roller/pressure wheel molding grinding process, effectively resolving the common industry pain points of surface damage and deformation often encountered with thin-walled, brittle, and hard materials. Its core advantage lies in the 0–55,000 rpm ultra-high-speed spindle, which ensures exceptional surface finish during micro-hole grinding. Additionally, the combination of X/Y-axis movement, adjustable center height, and a ±5° working head rotation angle enables multi-dimensional precise centering within extremely confined spaces. Capable of clamping workpieces ranging from Φ1mm to 25mm, the DF-YN25 is the ideal solution for automated precision micro-hole machining.
Here is the professional English translation, formatted to maintain the clear logic of "Industry Pain Point" vs. "Machine Innovation":
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**1. Breakthrough "Roller/Pressure Wheel" Non-Destructive Flexible Clamping (Specialized for Brittle and Thin-Walled Parts)**
**Industry Pain Point:** Conventional internal grinding machines predominantly use pneumatic three-jaw chucks or powerful electromagnetic chucks. When clamping thin-walled or highly brittle materials such as elastic collets, ceramic guide sleeves, and ceramic oil nozzles, these rigid clamping methods easily cause the workpiece to crack or suffer micro-deformation, resulting in an extremely high scrap rate.
**Machine Innovation:** It employs a contact method utilizing "rollers and pressure wheels," where the workpiece is ground in a forming/molding manner. This non-rigid clamping ensures uniform force distribution, perfectly achieving "non-destructive" internal hole grinding for miniature, brittle, and hard workpieces.
**Industry Pain Point:** Grinding extremely small diameter internal holes requires the use of micro-diameter grinding wheels. However, the spindle speed of conventional internal grinders is typically only 10,000 to 20,000 RPM, which fails to provide sufficient linear velocity. This results in low grinding efficiency, poor surface finish, and even an inability to evacuate chips effectively.
**Machine Innovation:** The spindle speed of this equipment reaches up to 55,000 RPM. This ultra-high rotational speed, combined with a 0.75kW main motor, drives the micro-grinding wheel to cut stably at high linear velocities, making it an absolute game-changer for resolving both surface finish and processing efficiency challenges in micro-hole grinding.
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**3. Full-Dimensional 3D Spatial Precision Centering Adjustment (X/Y Axes + Center Height + Angle Offset)**
**Industry Pain Point:** In micro-hole grinding, the most difficult aspects are "tool setting" and "alignment." Conventional equipment has a fixed spindle position. When dealing with micro-eccentric holes or special deep holes, operators must rely on constantly shimming up or shifting the machine tool, which is time-consuming, labor-intensive, and results in extremely poor precision.
**Machine Innovation:** The machine features exceptional adjustment redundancy. Not only does it allow for lateral and forward/backward movement along the X and Y axes, but the center height can also be flexibly adjusted up and down via the middle seat. More critically, the working head possesses a ±5° rotational adjustment capability. This multi-dimensional precision positioning structure enables operators to easily achieve highly accurate centering for micro-holes without the need to relocate the entire machine body.
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