Granite Round Platform

A Granite Round Platform is a high-precision measurement and processing auxiliary tool made from natural granite.Leveraging the inherent properties of granite and precision machining techniques,it plays a crucial role in industrial measurement,mechanical processing,precision manufacturing,and other fields.

Material Properties

The core advantages of Granite Round Platforms stem from the physical characteristics of granite itself:

High Stability:Granite is an igneous rock that has undergone hundreds of millions of years of geological evolution.Its internal structure is uniform and stable,with almost no internal stress.It is resistant to deformation even in environments with significant temperature changes,ensuring long-term precision retention.

High Hardness and Wear Resistance:Granite typically has a Mohs hardness of 6–7.Its surface is highly hard and wear-resistant,resisting scratches and abrasions during long-term use,thus maintaining surface flatness.

Excellent Rigidity:The dense and hard material offers high rigidity,minimizing elastic deformation under external forces and ensuring accuracy during measurement and processing.

Corrosion Resistance:It exhibits good resistance to common acids,alkalis,and other chemicals,resisting erosion and extending service life.

Low Water Absorption:Granite has a dense structure and low water absorption,making it moisture-resistant.It operates stably in humid environments and is less prone to bacterial growth or mildew.

Superior Shock Absorption:Natural granite has inherent damping properties,effectively absorbing vibrations and reducing the impact of external vibrations on measurement or processing.

Processing Technology

The manufacturing of Granite Round Platforms demands extremely high precision,involving the following key steps:

Raw Material Selection:High-quality natural granite blocks with uniform texture,no cracks,and no impurities are selected.Varieties such as diabase,Jinan Green,and Taishan Green are preferred for their excellent quality.

Cutting and Shaping:Large diamond saw blades are used to cut the granite block into a circular blank according to design dimensions,initially defining the platform’s basic shape.

Rough Grinding:Grinding wheels and other tools are used for rough grinding to remove surface irregularities and cutting marks,achieving a basic level of flatness.

Fine Grinding and Polishing:Precision grinders perform fine grinding to further improve flatness and surface光洁度(smoothness).During fine grinding,grinding depth and speed are strictly controlled to ensure precision.Finally,polishing is done to make the surface smooth and细腻(fine),reducing measurement errors.

Precision Inspection:After processing,precision measuring instruments(e.g.,levels,laser interferometers)test indicators such as flatness,roundness,and perpendicularity to ensure compliance with relevant standards.

Precision Grades

Granite circular platforms are classified into different precision grades based on flatness error,catering to diverse application needs.Common grades(per JB/T 7975–2010 standard)include:

Grade 0:Minimal flatness error,suitable for high-precision measurement and metrological verification,such as serving as a reference surface for precision instruments.

Grade 1:Small flatness error,ideal for inspection and marking in precision machining,e.g.,as a positioning reference for workpieces in mechanical processing.

Grade 2:Relatively larger flatness error,used in general processing and assembly for inspection and support,such as auxiliary support for worktables in ordinary machine tools.

Application Fields

Metrological Testing:Serves as a reference platform for high-precision measuring instruments(e.g.,micrometers,dial gauges,laser interferometers)to calibrate instruments and measure dimensional and form errors of workpieces.

Mechanical Processing:Acts as a positioning,clamping,and inspection reference in precision machining to ensure positional and dimensional accuracy of workpieces,such as in mold processing and precision part manufacturing.

Precision Assembly:Provides a flat,stable reference surface for component assembly in precision equipment,ensuring assembly accuracy—used,for example,in aerospace equipment and precision instrument assembly.

Marking Operations:Facilitates workpiece marking by leveraging the platform’s flatness and precision to draw accurate processing lines and position lines,guiding subsequent manufacturing.

Laboratory Research:Serves as a support platform for experimental equipment or a placement reference for samples in scientific laboratories,ensuring stability during experiments and accuracy of measurement data.