{"id":2225,"date":"2026-03-28T08:26:36","date_gmt":"2026-03-28T00:26:36","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2225"},"modified":"2026-03-28T08:26:37","modified_gmt":"2026-03-28T00:26:37","slug":"granite-precision-machine-components-characteristics-applications-and-future-of-high-precision-industrial-foundations%e4%b8%89","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/es\/2026\/03\/28\/granite-precision-machine-components-characteristics-applications-and-future-of-high-precision-industrial-foundations%e4%b8%89\/","title":{"rendered":"Componentes de m\u00e1quinas de precisi\u00f3n de granito: Caracter\u00edsticas, aplicaciones y futuro de las fundaciones industriales de alta precisi\u00f3n(\u4e09)"},"content":{"rendered":"

Manufacturing Processes and Technologies<\/p>\n\n\n\n

The manufacturing of precision granite components represents a perfect combination of “natural material properties” and “artificial precision machining” \u2014 the core challenge lies in how to process the material into components that meet ultra-precision requirements while retaining the natural stability of the granite. The entire manufacturing process involves multiple strictly controlled procedures, with each step directly affecting the final product’s precision.<\/p>\n\n\n\n

4.1 Raw Material Selection and Preprocessing<\/p>\n\n\n\n

Raw materials are the foundation determining final precision \u2014 if defects exist in the raw material, even the highest subsequent machining precision cannot guarantee the long-term stability of the component. Therefore, raw material selection and preprocessing are among the most critical stages of the manufacturing process:<\/p>\n\n\n\n

Mine Source Screening: Segments formed by deep magma activity, with fine crystallization and no obvious gneissic structure, must be selected. Priority is given to traditional high-quality varieties such as Jinan Qing and Mount Tai Qing. For example, the raw material screening standards of a leading enterprise stipulate that only fresh granite from below 30 meters underground is selected to avoid the influence of surface weathering layers.<\/p>\n\n\n\n

Rough Block Inspection: Through methods such as X-ray flaw detection and ultrasonic testing, rough blocks with internal defects such as color lines, spots, and micro-cracks are eliminated. The pass rate of this screening process is typically around 70%, with the pass rate for some high-end products even falling below 50%.<\/p>\n\n\n\n

Natural Aging: The cut blanks are placed in a constant temperature and humidity environment for static storage for 6-12 months to allow internal stresses to release naturally. This process is key to ensuring the long-term dimensional stability of the component \u2014 if the aging time is insufficient, the component will undergo slow deformation due to stress relaxation during use, leading to precision drift.<\/p>\n\n\n\n

Specification Cutting: Diamond circular saws are used to cut the blanks into blanks that are 5-10mm larger than the finished product size, reserving material for subsequent grinding. The flatness error of the cutting surface must be controlled within \u00b10.5mm, providing a basic guarantee for subsequent processing.<\/p>\n\n\n\n

Rough Machining and Forming
The core objective of rough machining is to remove the majority of the material allowce, preliminarily form the external contour of the component, and control the parallelism and perpendicularity of each plane, providing a foundation for subsequent precision grinding:
Equipment Selection: CNC gaing machines or 5-axis machining centers equipped with diamond tools must be adopted \u2014 the hardness of diamond tools is far higher than that of granite, effectively avoiding machining errors caused bol wear. For example, a certain enterprise uses a 5-axis CNC milling machine with positioning accuracy reaching \u00b10.01mm, ensuring the precision requirements of rough machining.
Process Par The milling depth is usually controlled at 0.5-1mm per pass, with a feed speed \u2264500mm\/min, to avoid excessive cutting forces causing new internalesses in the component. After rough machining, the flatness error of the component must be controlled within \u00b110\u03bcm, and the parallelism error of each plane must be controled within \u00b15\u03bcm.
Allowance Control: A machining allowance of 0.5-1mm must be reserved for subsequent grinding processes \u2014 this allowance needs to be precisely adjusted accohe component’s size and precision requirements; if the allowance is too large, it will increase the workload for subsequent grinding; if it is too small, it may fail to reme tool marks and stress layers from rough machining.<\/p>\n\n\n\n

4.3 Stress Relief Process
Stress relief is the core process for ensuring the long-term stability of the component \u2014 granite generates certain interesses during its natural formation and rough machining processes; if not eliminated, these stresses will gradually release during use, causing dimensional deformation. The industry mainly adopts two stress relief methods:
Nal Aging: The rough-machined component is placed in a ventilated, constant-temperature warehouse for static storage for 6-12 months, utilizing the slow changes in environmental temperature dually relax internal stresses. The stress relief rate of this method is approximately 30-50%, but it has a long cycle and large footprint, making it suitable only end products.
Vibration Aging: Vibration equipment is used to excite the component’s resonance, causing internal stresses to relax rapidly. The processing time for this method is usally only 30 minutes, with a stress relief rate reaching 60-80%, and it is low-cost, making it the mainstream process in the current industry. For example, tration aging equipment adopted by a certain enterprise can locate the component’s resonance point through intelligent frequency sweeping, achieving precise stress relief.
Some high-end products adopt a composite process of “nural aging vibration aging” \u2014 first releasing most of the stress through natural aging, then eliminating the remaining stress through vibration aging, achieving a final stress relief rate of0% to ensure the long-term stability of the component.<\/p>\n\n\n\n

Precision Grinding and Polishing
Precision grinding and polishing are core processes for achieving ultra-precision accuracy \u2014 by using abrasives of dit grit sizes in a graded manner, the surface roughness of components is gradually reduced, and flatness errors are corrected. The entire process must be carried out in a workshop with constantperature and humidity (temperature 20\u00b10.5\u2103, humidity 45-55%) to avoid interference from environmental factors:<\/p>\n\n\n\n

Rough Grinding: Using 400-800 mesh diamond grinding wheels to remove rough machining tool marks, correcting flatness errors to \u00b110\u03bcm\/m, and achieving a surface rougness Ra\u22640.8\u03bcm. The grinding pressure in this process is typically controlled at 0.3-0.5MPa, with a grinding head speed \u2264000r\/min.<\/p>\n\n\n\n

Semi-precision Grinding: Using 1200-2000 mesh diamond micro-powder to further reduce surface roughness, correcting flatness rrors to \u00b12\u03bcm\/m, and achieving a surface roughness Ra\u22640.2\u03bcm. This process requires the use of CNC grinding machines to achieve high-precision flatness correction
Precision Lapping: Using chromium oxide or diamond lapping paste in conjunction with gray cast iron lapping plates for manual or CNC lapping, correcting flatness errrs to \u00b10.5\u03bcm\/m and achieving a surface roughness Ra\u22640.02\u03bcm. This process places extremely high technical demands on workers \u2014 experienced lapping technicians can judge changeing pressure by hand feel to achieve sub-micron level precision control.<\/p>\n\n\n\n

Ultra-precision Polishing (Optional): For components requiring Grade 000 precision, magnetic fluid poli or ion beam modification technology must be adopted. The abrasive particle size in magnetic fluid polishing is typically 1-2\u03bcm, capable of achieving a surface roughne of Ra\u22640.1nm and flatness errors \u22640.2\u03bcm\/m\u00b2. This technology controls the distribution of abrasives via a magnetic field to achieve non-contact polishing, avoiding the mecharess effects of traditional polishing methods.<\/p>\n\n\n\n

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Quality Inspection and Calibration
Quality inspection and calibration serve as the final line of defense in ensuring product precision \u2014 every piece of granite precision comust undergo multi-dimensional inspection to confirm its precision meets requirements before it can be delivered for use:<\/p>\n\n\n\n

Flatness Inspection: Full-surface scanning is performed using laser interferometers or electronicFor instance, the resolution of Swiss WYLER electronic levels can reach 1\u03bcm\/m with an indication error \u22640.001mm\/m, enabling high-precisss detection.<\/p>\n\n\n\n

Surface Roughness Inspection: Atomic Force Microscopes (AFM) or surface roughness testers are used to verify if surface roughness meets requirements. For example, an e microscope adopted by a certain enterprise features a resolution of 0.01nm, capable of precisely measuring sub-nanometer level surface roughness.<\/p>\n\n\n\n

Form and Position Tolerance: Coordinate Measuring Machines (CMM) are used to inspect form and position tolerances such as parallelism, perpendicularity, and straightness. For example, the positioningcy of German Mahr CMMs can reach \u00b10.5\u03bcm, ensuring high-precision detection of form and position tolerances.<\/p>\n\n\n\n

Stability Inspection: Components are placed i temperature environment for 24 hours of static placement, and their dimensional changes are measured to confirm stability meets requirements. For instance, a certain enterprise’s stability inspection standard stipulates thatonal changes within 24 hours must be \u22640.1\u03bcm to be deemed qualified.<\/p>\n\n\n\n

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

Procesos y tecnolog\u00edas de fabricaci\u00f3n La fabricaci\u00f3n de componentes de granito de precisi\u00f3n representa una combinaci\u00f3n perfecta de \u201cpropiedades naturales del material\u201d y \u201cmecanizado artificial de precisi\u00f3n\u201d: el reto principal reside en c\u00f3mo procesar el material para obtener componentes que cumplan los requisitos de ultraprecisi\u00f3n sin perder la estabilidad natural del granito. Todo el proceso de fabricaci\u00f3n implica m\u00faltiples...<\/p>","protected":false},"author":1,"featured_media":2228,"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-2225","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\/\u5012\u89d2\u5e73\u53f01.jpg",500,357,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":119,"filter":"raw","cat_ID":35,"category_count":119,"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\/2225","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=2225"}],"version-history":[{"count":2,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts\/2225\/revisions"}],"predecessor-version":[{"id":2230,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/posts\/2225\/revisions\/2230"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/media\/2228"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/media?parent=2225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/categories?post=2225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/es\/wp-json\/wp\/v2\/tags?post=2225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}