НОВОСТИ

Конкретные факторы, влияющие на колебания точности гранитных платформ. Они подразделяются на шесть основных категорий: факторы, связанные с сырьем; факторы, связанные с производственным процессом; факторы, связанные с конструкцией; факторы, связанные с монтажом и опорой; факторы, связанные с условиями эксплуатации; а также повреждения, возникающие в процессе использования и эксплуатации. Для каждой категории определены количественные показатели влияния, что позволяет использовать данную информацию в технической документации и при участии в тендерах по внешнеторговым сделкам. I. Факторы, связанные с сырьем (коренные причины)…

Complete Analysis of Long-term Precision Changes in Granite Plates (Comparison with Cast Iron by Material, Process, and Operating Conditions) I. Core Conclusions For qualified 00/000 grade Jinan Blue granite plates, under normal constant temperature and standardized usage conditions, the precision drift over ten years is extremely minimal, and significant deformation almost never occurs;However, inferior stone…

Complete Acceptance Standards for 00/000 Grade High-Precision Granite Surface Plates I. Basis of Execution II. Part One: Raw Material Acceptance (Mandatory inspection upon arrival, determining long-term deformation resistance) 1. Hard Requirements for Stone Types Only Jinan Qinghui Longyan / Indian Black Fine-grained Granite are permitted; dyed stones, stratified miscellaneous stones, and porous ordinary marble are…

Complete Processing Workflow for # 00/000 Grade High-Precision Granite Plate Adhering to the national standard GB/T 20428 “Granite Flat Plates”, the entire precision machining process must be completed in a dust-free, vibration-dampened workshop at a constant temperature of 20±0.5℃. The core process is divided into nine major stages: Raw Material Screening → Rough Cutting →…

The Impact of Granite Platform Processing Technology on Accuracy and StabilityThe initial flatness of a granite platform at the time of delivery is determined by the grinding process, while its long-term stability is determined by the full-process stress control. No matter how good the raw material is, if the processing technology is unreasonable, it may…

How to determine whether the raw materials for granite platforms meet the requirementsThe later-stage deformation and precision deviation of granite platforms often stem from defects in the stone billets. The judgment of raw materials is divided into document verification, visual inspection, simple on-site screening, laboratory testing, and ultrasonic flaw detection to check for internal defects,…

How to select high-precision granite platforms with long-term stability The long-term precision drift and warping deformation of granite platforms are mostly not caused by insufficient grinding precision, but by the loss of control in five major stages: raw material selection, stress aging, structural design, processing technology, and acceptance inspection. To achieve long-term stability, one cannot…

Complete Purchasing Guide for Precision Granite Measuring Tools (Industry Alias: Marble Measuring Tools)The industry term “marble measuring tools” actually refers entirely to natural gabbro granite; cast iron and ordinary marble cannot meet the requirements of micron-level precision inspection. Selection is divided into 7 core dimensions: matching material, precision, size, thickness, process, certification, and accessories according…

Data Monitoring and Analysis Report on Granite Bases for Chinese CMMs I. Monitoring Objects and Basic Conditions II. Comparative Analysis of Temperature Deformation Monitoring Data (Core Error Sources) Material Maximum surface temperature difference Total expansion per meter ΔL 48h measurement repeatability drift Jinan Qing Granite ≤1.8℃ ≤0.006mm/m 0.6~0.8μm HT250 Cast Iron 7.5~8.2℃ 0.014mm/m 2.1~2.5μm Data…

Analysis of the Six Core Advantages of Using Granite for High-Precision Machine BasesI. Extremely Low Thermal Expansion Coefficient, Zero Precision Drift in Constant Temperature Conditions (Core Advantage)The linear expansion coefficient of high-density Jinan blue granite is only 4.5~6×10⁻⁶/℃, about half that of cast iron (11~13×10⁻⁶/℃), and its thermal diffusion speed is much slower than metals,…