{"id":2035,"date":"2026-03-07T08:26:13","date_gmt":"2026-03-07T00:26:13","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2035"},"modified":"2026-03-07T08:26:14","modified_gmt":"2026-03-07T00:26:14","slug":"causes-and-preventive-measures-of-granite-platform-deformation","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/fr\/2026\/03\/07\/causes-and-preventive-measures-of-granite-platform-deformation\/","title":{"rendered":"Causes et mesures pr\u00e9ventives de la d\u00e9formation des plates-formes en granit"},"content":{"rendered":"

I. Main Causes of Deformation<\/p>\n\n\n\n

    \n
  1. Environmental Factors (Most Common Triggers)
    Temperature Fluctuations: Although granite has a low coefficient of thermal expansion, environmental temperature fluctuations exceeding \u00b15\u00b0C<\/strong> can cause local warping and micro-cracks due to thermal expansion and contraction; direct sunlight or proximity to heat\/cold sources create local temperature gradients, accelerating deformation.
    Humidity Effects: When relative humidity remains >70%<\/strong> for a long time, granite undergoes slight moisture absorption and expansion; it contracts in dry environments, and repeated wet-dry cycles lead to dimensional instability.
    Vibration Interference: External vibrations (from equipment operation or personnel movement) cause redistribution of internal stresses; long-term accumulation triggers micro-deformation.<\/li>\n\n\n\n
  2. Material and Processing Factors (Intrinsic Roots)
    Residual Internal Stresses: Geological stresses are retained during the formation and mining of natural granite; mechanical stresses are introduced during processing such as cutting and rough grinding; the slow release of these stresses during long-term use leads to platform creep and warping.
    Material Selection and Process Defects: Choosing unstable stone, failing to perform sufficient stress-relief treatment during processing, or insufficient grinding precision all create hidden risks for long-term deformation.<\/li>\n\n\n\n
  3. Usage and Loading Factors (Direct Triggers)
    Overloading and Localized Pressure: Exceeding the rated load (usually 1\/10 of compressive strength) or placing workpieces concentrated in corners\/local areas causes stress concentration, leading to local crushing and grain spalling.
    Improper Operation: Striking, welding, or dragging heavy objects on the platform surface generates impact and friction damage, destroying surface precision and internal stress balance.<\/li>\n\n\n\n
  4. Installation and Support Factors (Foundational Causes)
    Unreasonable Support: Three-point support is commonly used for small and medium platforms; for large platforms (>1 ton), if three-point support is still used, the large distance between support points easily leads to center sagging.
    Improper Leveling and Unstable Foundation: Uneven force distribution on support points, foundation settlement, and lack of vibration isolation treatment lead to platform twisting and deformation under long-term uneven loading.<\/li>\n<\/ol>\n\n\n\n

    II. Prevention and Control Measures<\/p>\n\n\n\n

      \n
    1. Environmental Control (Source Prevention)
      Constant Temperature and Humidity: Precision measurement environments should be controlled at 20\u00b12\u00b0C with humidity 40%\u201360%; for ultra-precision scenarios, 20\u00b10.5\u00b0C is recommended.
      Isolation of Interference: Keep away from heat\/cold sources (direct sunlight, air conditioner vents, radiators, machine tools) and vibration sources; install vibration isolation pads or anti-vibration bases.
      Temperature and Humidity Equilibration: Allow the platform and workpieces to acclimate in the same environment for 24\u201372 hours before use to eliminate thermal deformation caused by temperature differences.<\/li>\n\n\n\n
    2. Material and Processing Control (Intrinsic Assurance)
      Optimal Stone Selection: Select stable granite such as Jinan Qing or Mount Tai Qing that has undergone sufficient geological aging.
      Adequate Stress Relief: Perform natural aging for 6\u201312 months before processing, or use vibration stress relief or heat treatment to release internal stresses.
      Precision Processing: Adopt high-precision grinding and polishing processes to ensure surface flatness and uniform internal stress distribution.<\/li>\n\n\n\n
    3. Installation and Support Optimization (Foundational Stability)
      Rational Support: Use three-point support for small and medium platforms; for large platforms, use multi-point or floating support to evenly distribute self-weight and load.
      Precise Leveling: Use electronic levels or laser interferometers for repeated calibration, following the principle of “low before high, gradual approach” to avoid excessive local stress.
      Installation Acclimation: Allow the platform to acclimate for 24\u201372 hours after installation before use, letting it adapt to the environment and release installation stresses.<\/li>\n<\/ol>\n\n\n\n
        \n
      1. Standard Usage and Maintenance (Process Assurance)
        Load Control: Strictly do not exceed the rated load; distribute workpieces as much as possible and use shims to disperse localized pressure; the load is recommended not to exceed 80% of the rated value.
        Handle with Care: Prohibit striking, dragging, or welding; handle workpieces and measuring tools gently to avoid impact.
        Daily Cleaning: Wipe with a microfiber cloth; do not use acidic or alkaline cleaning agents; deal with oil stains promptly using a neutral cleaner.
        Regular Calibration: Check flatness every 6 months using a laser interferometer and electronic level; return to the factory for grinding and repair immediately if errors exceed tolerances.
        Long-term Monitoring: Set up fixed monitoring points, record coordinate changes regularly, analyze precision drift trends, and issue early warnings for deformation.<\/li>\n<\/ol>\n\n\n\n

        III. Recommendations for Handling Deformation
        Minor Deformation \/ Wear: Use manual grinding diamond grinding paste for local repair to restore surface precision.
        Moderate Deformation: Return to the factory for re-precision grinding and scraping to eliminate warping and restore flatness.
        Severe Deformation \/ Cracks: Replace the platform after assessment to avoid affecting measurement reliability.<\/p>\n\n\n\n

        \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

        I. Main Causes of Deformation II. Prevention and Control Measures III. Recommendations for Handling DeformationMinor Deformation \/ Wear: Use manual grinding diamond grinding paste for local repair to restore surface precision.Moderate Deformation: Return to the factory for re-precision grinding and scraping to eliminate warping and restore flatness.Severe Deformation \/ Cracks: Replace the platform after assessment…<\/p>","protected":false},"author":1,"featured_media":2049,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/03\/mmexport1772239418525-768x1024.jpg",768,1024,true],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/fr\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":121,"filter":"raw","cat_ID":35,"category_count":121,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2035","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/comments?post=2035"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2035\/revisions"}],"predecessor-version":[{"id":2038,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2035\/revisions\/2038"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media\/2049"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media?parent=2035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/categories?post=2035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/tags?post=2035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}