Granite Square

Multi-Purpose Granite Square Box

The Versatile Foundation for Comprehensive Metrology&Production

Concept Overview:One Tool,Infinite Applications

The Multi-Purpose Granite Square Box represents an evolutionary leap in metrology tool design—a single,intelligently engineered artifact that serves as multiple measurement references simultaneously.By incorporating various precision features into one monolithic granite structure,it eliminates the need for multiple specialized tools,streamlining workflows in calibration labs,quality control departments,and production floors.This is not merely a square box;it's an integrated measurement system that combines the functions of a surface plate,angle reference,height standard,and alignment fixture.

Integrated Feature Set&Modular Design

Multi-Functional Surface System

Primary Reference Faces:Three mutually perpendicular surfaces ground to±1.0 arc-second accuracy

Precision Grid Patterns:Laser-engraved grid lines with 0.5mm spacing accuracy on two primary faces

Modular Mounting Holes:Array of M6 or¼-20 threaded inserts on all faces for fixture attachment

T-Slot Integration:Machined T-slots along perimeter edges for flexible clamping solutions

Magnetic Sections:Strategic ferrous inserts allow selective magnetic holding where needed

Integrated Measurement References

Step Height Standards:Multiple precision-ground steps with height increments of 1.0mm,5.0mm,and 10.0mm

Radius References:Precisely machined concave and convex radii(R5,R10,R25,R50mm)

Angle References:Additional reference angles of 30°,45°,and 60°machined into specific faces

Center Finding Features:Precision cross-hairs and center marks at geometric centers of all faces

Edge Reference Standards:Varying edge preparations including sharp,radiused,and chamfered profiles

Enhanced Metrology Features

Tooling Ball Array:Matrix of carbide tooling balls at known coordinates for CMM probe qualification

Laser Target Points:Retro-reflective targets for laser tracker and scanner alignment

Flatness Reference Zones:Designated ultra-flat areas(≤0.1µm/100mm)for gauge calibration

Parallelism Reference Sets:Multiple parallel surfaces at precise spacing intervals

Technical Specifications

Base Accuracy Standards

Primary Perpendicularity:90°±1.5 arc-seconds between adjacent reference faces

Surface Flatness:0.3µm per 100mm on designated reference zones

Dimensional Accuracy:±5µm on all critical features and dimensions

Surface Finish:0.4-0.8µm Ra on measurement surfaces;0.8-1.6µm Ra on clamping surfaces

Feature-Specific Accuracies

Step Height Accuracy:±2µm per step increment

Radius Accuracy:±5µm of nominal radius

Angle Reference Accuracy:±15 arc-seconds from nominal

Grid Line Accuracy:Positional tolerance±0.1mm across entire surface

Tooling Ball Positional Accuracy:±3µm relative to box datum

Material&Construction

Granite Type:Premium black granite with density≥2.98 g/cm³

Stabilization:60-day minimum thermal conditioning

Surface Treatments:Non-reflective coating on measurement faces;protective sealant on all surfaces

Modularity:Features designed as replaceable inserts where applicable

Standard Configuration Packages

Basic Metrology Package

Includes:Primary reference faces,basic grid pattern,center marks,and standard mounting holes

Dimensions:300mm cube(12"cube)

Weight:Approximately 70kg

Best For:General inspection departments,toolrooms,educational institutions

Advanced Calibration Package

Includes:All Basic features plus step standards,radius references,tooling ball array,and laser targets

Dimensions:450mm cube(18"cube)

Weight:Approximately 160kg

Best For:Calibration laboratories,aerospace/automotive suppliers,precision manufacturers

Production Master Package

Includes:All Advanced features plus T-slots,magnetic sections,angle references,and parallelism sets

Dimensions:600mm cube(24"cube)

Weight:Approximately 320kg

Best For:High-volume manufacturing,research&development,contract measurement services

Custom Enterprise Package

Fully Customizable:Client-specified feature combinations and dimensions

Integration:Can be designed to interface with specific CMMs,vision systems,or robotic cells

Materials:Options for different granite types or composite materials

Best For:National laboratories,semiconductor equipment manufacturers,defense contractors

Application Workflows

Single-Setup CMM Performance Verification

Volumetric Accuracy Check:Measure tooling ball matrix to assess 3D positioning accuracy

Probe Qualification:Use various radius features to verify probe tip geometry

Software Verification:Check step heights and parallel surfaces for measurement algorithm accuracy

Environmental Monitoring:Track measurement variations across different box orientations

Production Line Gauge Management

Daily Gauge Calibration:Use flatness zones and step standards for quick gauge verification

Fixture Alignment:Employ grid patterns and T-slots for production fixture setup

First-Article Inspection:Comprehensive geometric verification using all available features

Operator Training:Multiple reference features support comprehensive measurement training