I. Material Selection and Process Requirements
1. Material Type
HT300 Gray Cast Iron: Tensile strength ≥300MPa, pearlite content ≥95%, suitable for high-rigidity applications (such as welding heavy workpieces).
Q345 Steel: Requires overall heat treatment to eliminate internal stress, combining strength and weldability, commonly used in tooling design in the automation industry.
Ductile Cast Iron (e.g., QT450-10): Elongation ≥10%, suitable for dynamic load environments.
2. Casting and Heat Treatment Process
Resin sand casting is used to avoid porosity and sand inclusion defects.
Aging treatment is mandatory (natural aging ≥6 months or artificial aging at 550℃ for 4 hours), otherwise the flatness deviation may exceed 0.15mm/m.
II. Accuracy and Tolerance Standards
1. Flatness Error: The flatness of the working surface must be ≤0.10mm/1000 (high-precision inspection), graded according to GB/T 22095-2008 standard (e.g., grade 0 ≤8μm/1000mm).
2. Hole Spacing and Dimensional Tolerance: Hole position accuracy ≤0.05mm, hole diameter accuracy φ28D10.
Adjacent hole spacing errors must be strictly controlled, as cumulative hole spacing errors affect workpiece positioning accuracy.
3. Perpendicularity and Roughness: Perpendicularity between the side and top surfaces ≤0.10mm/200.
Working surface roughness ≤3.2μm, ensuring wear resistance.
III. Brand Qualification and Testing Verification
1. Brand Selection: Prioritize manufacturers with industry experience (e.g., 78 years of history), such as Jianxin Measuring Tools, whose products have been market-tested (e.g., tens of thousands of units in the market). 2. Inspection Report: The manufacturer is required to provide a coordinate measuring machine (CMM) inspection report. The measured data must meet the nominal accuracy (e.g., flatness, hole spacing).
Pay attention to ISO9001, CE, and other certifications to ensure standardized processes.
IV. Functionality and Expandability
Modular Design: Supports standardized module splicing to expand the working area to meet complex working conditions.
Load Capacity: Select the load-bearing type according to requirements (e.g., 5T for frame type, 3T for lifting type).
