{"id":3282,"date":"2026-08-22T10:29:48","date_gmt":"2026-08-22T02:29:48","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=3282"},"modified":"2026-08-22T10:29:49","modified_gmt":"2026-08-22T02:29:49","slug":"methods-for-processing-granite-stone-into-equipment-bases","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/es\/2026\/08\/22\/methods-for-processing-granite-stone-into-equipment-bases\/","title":{"rendered":"M\u00e9todos para transformar la piedra de granito en bases para equipos"},"content":{"rendered":"

Complete Process for Granite Stone Processing Equipment Bases (Jinan Green \/ Diabase, CMM and Lithography Machine Precision Bases)<\/h1>\n\n\n\n
\n

Core Logic: Material Selection \u2192 Sawing Blank \u2192 Rough Machining \u2192 Stress Relief Aging \u2192 Functional Hole and Slot Machining \u2192 Embedded Threaded Inserts \u2192 Multi-stage Grinding \u2192 Manual Fitting and Grinding \u2192 Constant Temperature Resting \u2192 Final Inspection<\/strong>, high precision (00\/000 grade) must be completed in a 20\u00b11\u2103 constant temperature workshop<\/strong>, with continuous water cooling throughout, and dry cutting or dry grinding is strictly prohibited.<\/p>\n<\/blockquote>\n\n\n\n

1. Raw Material Selection (Determines Long-term Stability)<\/h2>\n\n\n\n

Prioritize Jinan Green Diabase<\/strong>, which features fine grains, no cracks, no inclusions, no white spots, and no weathering; reject spliced materials, use whole-block blanks.<\/p>\n\n\n\n

    \n
  • Compressive strength \u2265220MPa, high elastic modulus, low thermal expansion coefficient, and vibration resistance superior to cast iron bases.<\/li>\n\n\n\n
  • Machining allowance reserved on each side of the blank: 3-5mm<\/strong>, with a 0.4-0.6mm grinding allowance on each side of weight-reduction slots for large bases.<\/li>\n\n\n\n
  • All corners and slot corners must be rounded with R\u22655mm; right angles are extremely prone to chipping and cracking.<\/li>\n<\/ul>\n\n\n\n

    2. Sawing and Rough Machining (Diamond Tools, Water-cooled)<\/h2>\n\n\n\n
      \n
    1. Use diamond wire saws \/ bridge saws to cut the overall external dimensions.<\/li>\n\n\n\n
    2. Use gantry CNC grinders \/ stone processing centers to rough-grind the six faces: quickly remove excess material and correct overall parallelism and perpendicularity.<\/li>\n\n\n\n
    3. Post-rough machining state: leave a 0.3-0.5mm precision grinding allowance<\/strong>, and rough-machine all weight-reduction slots and clearance slots to position without reaching final dimensions.<\/li>\n<\/ol>\n\n\n\n
      \n

      \u26a0\ufe0f Sequence: Perform aging after rough machining, do not age after precision machining<\/strong>. Rough machining generates significant cutting internal stress; if not released, it will cause warping and precision drift later.<\/p>\n<\/blockquote>\n\n\n\n

      3. Stress Relief Aging (Essential for High-Precision Bases)<\/h2>\n\n\n\n

      Option A: High-end 000 Grade (Natural Constant Temperature Aging)<\/h3>\n\n\n\n

      Place the workpiece flat in a constant temperature and humidity workshop at 20\u00b11\u2103, with 45-55% humidity; flip once every 7 days and let rest for 2-4 weeks<\/strong> to uniformly release stress.<\/p>\n\n\n\n

      Option B: Batch Expedited Artificial Composite Hot-Cold Cycle Aging<\/h3>\n\n\n\n
        \n
      1. Insulate in an 80\u2103 drying room for 24h;<\/li>\n\n\n\n
      2. Insulate at -10\u2103 for 4h;<\/li>\n\n\n\n
      3. Slowly return to 20\u2103, rest at constant temperature for 72h;<\/li>\n<\/ol>\n\n\n\n
        \n

        The temperature rise and fall rates must be slow to prevent the formation of new micro-cracks.<\/p>\n\n\n\n

        The process for ordinary equipment bases can be simplified; CMM and semiconductor lithography machine bases must undergo aging, otherwise precision will drift after a period of use<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n

        4. Functional Feature Machining: Drilling, Slotting, Counterboring, and Back-chamfer Bonding<\/h2>\n\n\n\n

        Use diamond tools exclusively, with continuous water cooling and low-speed feed<\/strong>, and impact drilling is prohibited.<\/p>\n\n\n\n

          \n
        1. Drilling: Pre-drill with a small bit first, then enlarge the hole to prevent chipping at the hole entrance; edge distance \u226550mm, hole-to-hole spacing \u2265100mm to reduce cracking risk.<\/li>\n\n\n\n
        2. Counterbore and stepped holes are milled in layers; weight-reduction slots and guide rail installation slots are rough-machined to position, leaving a grinding allowance.<\/li>\n\n\n\n
        3. Back-chamfer Bonding Process (for large base splicing)<\/strong><\/li>\n<\/ol>\n\n\n\n
            \n
          • Grind the mating surfaces for a tight fit, then bond with a thin layer of epoxy structural adhesive;<\/li>\n\n\n\n
          • Cure at constant temperature for 24-48h after bonding, and perform overall grinding only after curing is complete;<\/li>\n\n\n\n
          • Avoid splicing for high-end metrology equipment bases as much as possible; spliced bases are not recommended for 000-grade precision.<\/li>\n<\/ul>\n\n\n\n

            5. Pre-embedded Stainless Steel Threaded Sleeve (The process most likely to compromise precision)<\/h2>\n\n\n\n
            \n

            Process sequence: Rough grinding – Drilling – Pre-embedding threaded sleeve – Complete glue curing – Fine grinding<\/strong>, strictly prohibiting fine grinding before drilling and inserting the sleeve! This will cause stress rebound deformation of the base.<\/p>\n<\/blockquote>\n\n\n\n

              \n
            1. Select thickened 304\/316 stainless steel sleeves with a wall thickness \u22652mm; thin copper sleeves are not allowed.<\/li>\n\n\n\n
            2. Clean the hole thoroughly, apply AB epoxy glue evenly to the outer wall of the sleeve, with a glue layer of about 0.5mm.<\/li>\n\n\n\n
            3. Press in vertically, ensuring the end face of the sleeve is slightly lower than the granite surface to avoid protrusion.<\/li>\n\n\n\n
            4. Cure at a constant temperature for over 24 hours until the glue is completely hardened before proceeding to the grinding process.<\/li>\n<\/ol>\n\n\n\n

              6. Multi-stage Grinding (Constant temperature workshop 20\u00b11\u2103)<\/h2>\n\n\n\n

              Use grinding wheels step by step, do not skip grits, all water-cooled:<\/p>\n\n\n\n

                \n
              1. Semi-fine grinding 200# – 400#<\/strong>: Remove tool marks, flatness \u22640.02 – 0.05 mm\/m.<\/li>\n\n\n\n
              2. Fine grinding 800# – 1200#<\/strong>, then to 2000# resin diamond grinding wheels; leave a manual lapping allowance of 0.01 – 0.03 mm<\/strong> after grinding.<\/li>\n<\/ol>\n\n\n\n
                  \n
                • Grade 0: Can be completed by mechanical grinding;<\/li>\n\n\n\n
                • Grade 00 \/ 000: Must be manually lapped (lapping), machines cannot achieve this alone<\/strong>.<\/li>\n<\/ul>\n\n\n\n

                  7. Manual Precision Lapping (Core process for Grade 00\/000)<\/h2>\n\n\n\n
                    \n
                  1. Use a higher-grade 000 standard lapping plate, silicon carbide micro-powder, and cross-trajectory lapping with water lubrication.<\/li>\n\n\n\n
                  2. Blue oil spot inspection: For a 25\u00d725mm area, contact spots must be \u226520, spots must be uniform, and no large blank areas are allowed.<\/li>\n\n\n\n
                  3. For defects such as the center of the base bulging or the ends sinking, lightly scrape the high points; this step takes a long time for large-sized granite bases.<\/li>\n<\/ol>\n\n\n\n

                    Precision Reference (GB\/T20424)<\/p>\n\n\n\n

                      \n
                    • Grade 00: Flatness 2 – 5 \u03bcm\/m<\/li>\n\n\n\n
                    • Grade 000: Flatness 1 – 2 \u03bcm\/m; Ra \u22640.1\u03bcm or even mirror Ra \u22640.02\u03bcm.<\/li>\n<\/ul>\n\n\n\n

                      8. Cleaning and Constant Temperature Resting<\/h2>\n\n\n\n

                      High-pressure wash and blow-dry all stone dust and grinding micro-powder; place the workpiece back in the constant temperature workshop to rest for 24 – 72 hours to eliminate surface thermal stress generated during grinding. Once dimensions are completely stable, perform the final inspection.<\/p>\n\n\n\n

                      9. Final Inspection of the Entire Project<\/h2>\n\n\n\n
                        \n
                      • Flatness: Laser interferometer \/ Precision level<\/li>\n\n\n\n
                      • Parallelism, Perpendicularity: Electronic level, Autocollimator<\/li>\n\n\n\n
                      • Hole position accuracy: Coordinate Measuring Machine (CMM)<\/li>\n\n\n\n
                      • Roughness: White light interferometer<\/li>\n\n\n\n
                      • Threaded sleeve: Go\/No-go gauge, pull-out force spot check<\/li>\n<\/ul>\n\n\n\n

                        10. Key Pitfall Avoidance Points<\/h2>\n\n\n\n
                          \n
                        1. Maintain constant temperature throughout the entire finishing process, as temperature fluctuations directly cause micron-level deformation;<\/li>\n\n\n\n
                        2. Drilling and inserting the sleeve must be done before<\/strong> fine grinding;<\/li>\n\n\n\n
                        3. Aging cannot be skipped, perform it after rough processing;<\/li>\n\n\n\n
                        4. Strictly prohibit dry grinding and dry drilling, as it easily generates internal micro-cracks, causing later precision failure;<\/li>\n\n\n\n
                        5. Bonded bases can only reach Grade 00 at most; for Grade 000, try to use a single block of stone.<\/li>\n<\/ol>\n\n\n\n

                          Simple Comparison: Granite Base vs. Cast Iron Base<\/h3>\n\n\n\n

                          Cuadro<\/p>\n\n\n\n

                          Art\u00edculo<\/th>Granite (Jinan Green)<\/th>Cast Iron Base<\/th><\/tr><\/thead>
                          Amortiguaci\u00f3n de vibraciones<\/td>Excellent, high damping, anti-vibration<\/td>Average<\/td><\/tr>
                          Thermal Stability<\/td>Small thermal expansion, extremely stable in constant temperature environments<\/td>Prone to thermal deformation<\/td><\/tr>
                          Precision Limit<\/td>Can achieve Grade 000 (1-2\u03bcm\/m)<\/td>Up to around Grade 0<\/td><\/tr>
                          Weaknesses<\/td>Cannot be tapped, must embed steel sleeves, prone to chipping from impact<\/td>Can be tapped directly, good impact resistance<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                          \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

                          Proceso completo para las bases de los equipos de procesamiento de granito (Jinan Green \/ diabasa, bases de precisi\u00f3n para m\u00e1quinas CMM y de litograf\u00eda). L\u00f3gica fundamental: Selecci\u00f3n del material \u2192 Corte en bruto \u2192 Mecanizado en bruto \u2192 Envejecimiento para aliviar tensiones \u2192 Mecanizado de orificios y ranuras funcionales \u2192 Incrustaci\u00f3n de insertos roscados \u2192 Rectificado en varias etapas \u2192 Ajuste y rectificado manuales \u2192 Reposo a temperatura constante \u2192\u2026<\/p>","protected":false},"author":1,"featured_media":3283,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_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-3282","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\/08\/b.png",631,807,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/es\/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":361,"filter":"raw","cat_ID":35,"category_count":361,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts\/3282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/comments?post=3282"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts\/3282\/revisions"}],"predecessor-version":[{"id":3284,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts\/3282\/revisions\/3284"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/media\/3283"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/media?parent=3282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/categories?post=3282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/tags?post=3282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}