Marble Platform Placement and Adjustment: From Environmental Requirements to Fine Tuning

As a fundamental tool for precision measurement and workpiece inspection, the accuracy of marble platform placement and adjustment directly affects measurement precision and equipment service life. The following detailed explanations cover environmental requirements, placement steps, adjustment methods, and precautions:

Environmental Requirements for Marble Platform Placement

1. Space and Temperature Control

• Space Requirements: The placement area should be spacious, avoiding vibration sources (such as punching machines, fans), heat sources (such as radiators, ovens), and humid environments to prevent marble deformation due to thermal expansion/contraction or moisture.

• Temperature Requirements: The ideal working temperature is 20±2℃, with temperature fluctuation ≤0.5℃/h. Avoid direct sunlight on the platform surface.

2. Ground and Support Conditions

• Ground Foundation: The ground must be flat and sturdy, with a load-bearing capacity ≥3 times the platform weight (e.g., if the platform weighs 500kg, the ground load-bearing capacity should be ≥1500kg).

• Support Structure: Use special supports (such as cast iron brackets), and equip the bottom of the supports with shock-absorbing pads to ensure uniform force on the support points.

Placement Steps for Marble Platform

1. Preparation Work

• Inspect the platform surface for scratches or collisions, and wipe it clean with a dust-free cloth; confirm that the support components are complete (supports, adjustment bolts, shock-absorbing pads, etc.).

• Mark the support positions in the placement area to ensure the support spacing meets the platform design requirements (typically 600-1000mm, refer to the product manual for details).

2. Hoisting and Preliminary Positioning

• Use nylon slings or special hoisting tools to lift the platform steadily, avoiding direct contact between steel cables and the platform edges (to prevent cracking).

• Gently place the platform on the supports, adjust the horizontal position to align the platform edges with the center of the supports, with an error ≤5mm.

3. Support Installation and Preliminary Fixing

• Paste the shock-absorbing pads at the bottom of the supports on the marked ground positions, tighten the anchor bolts at the bottom of the supports (temporarily not fully tightened), and ensure the supports are perpendicular to the ground.

• Initially detect the platform surface with a level, adjust the platform level by adding or reducing shims (copper or stainless steel sheets) at the bottom of the supports, so that the bubble offset of the level ≤1 grid.

Fine Adjustment Methods for Marble Platform

1. Level Adjustment Tools

• Main tools: Electronic level (accuracy 0.001mm/m), frame level (accuracy 0.02mm/m), dial indicator (used with a gauge stand).

2. Adjustment Steps (Taking Electronic Level as an Example)

(1) Grid Measurement

• Divide the platform surface into 500mm×500mm grids (adjust according to the platform size) and mark the measurement points.

• Place the electronic level at the measurement points, record the level data of each point (unit: mm/m), and draw a deviation distribution map.

(2) Support Point Adjustment Principles

• Three-Point Support Method: If the platform uses three-point support, take one point as the reference and adjust the heights of the other two points to make the level readings consistent.◦ Example: Taking point A as the reference, if point B is 0.05mm/m higher, rotate the adjustment bolt at point B clockwise until the reading matches point A.

• Multi-Point Support Method: If the platform uses four-point or multi-point support, first adjust the diagonal support points, then gradually adjust the middle support points, following the principle of "coarse adjustment first, then fine adjustment".◦ For a four-point support platform, first adjust the diagonal two points to level, then adjust the other two points, and repeatedly measure until the horizontal deviation in the entire area ≤0.01mm/m.

(3) Dial Indicator Auxiliary Calibration

• Fix the dial indicator on the platform edge, make the gauge head contact the platform surface, move the dial indicator slowly, and detect the surface flatness (error ≤0.005mm/m).

• If the flatness exceeds the standard, readjust the height of the support points until the dial indicator reading fluctuation is within the allowable range.

3. Stress Release and Stability Test

• After adjustment, let it stand for 24 hours, 复测 the level every 4 hours during this period. If the deviation exceeds 0.005mm/m, readjust.

• Place a heavy object on the platform surface (weight ≤50% of the rated load), observe for 2 hours, and confirm that the level does not change.

Precautions

1. Operation Specifications

• Do not strike the platform surface during adjustment, and the tightening torque of the bolts should be uniform (refer to the support manual, typically 15-25N・m).

• When collaborating with multiple people, unified command is required to avoid tilting caused by uneven force on the platform.

2. Routine Maintenance

• Wipe the platform with a neutral cleaner regularly (monthly), and do not use acidic or alkaline solvents (to prevent corrosion of marble).

• When not in use for a long time, cover it with a dust-proof cloth to avoid dust accumulation affecting precision.

3. Abnormality Handling

• If cracks or chipping occur on the platform surface, stop using it immediately and contact the manufacturer for maintenance; when the level suddenly exceeds the standard, check whether the supports are loose or the ground is settling.

Common Problems and Solutions

Following the above steps ensures the placement and adjustment precision of the marble platform. For super-large 规格 platforms (such as length>3m), it is recommended that professional technicians use equipment like laser interferometers for calibration to meet higher precision requirements (such as within 0.001mm/m).