1) Flat stitching Size: 100 * 100-3000 * 6000, (special specifications according to the demand side, the drawings produced.) 
 2) splice plate Application: Suitable for a variety of inspection, precision measurement of the reference plane, mechanical testing machine for measuring benchmark to check the dimensional accuracy of parts or disruptive behavior, and for precision marking, in the machinery is indispensable the basic tools. 
 3) Flat stitching materials and processing: material for high-strength cast iron HT200-300, face hardness of HB170-240, after two manual processing (annealing 600 degrees -700 degrees artificial and natural aging 2-3 years) use of the product accuracy and stability, good wear resistance. 
 4) Flat stitching accuracy: standard verification procedures according to national implementation, four grades 0,1,2,3, respectively. 

 Cast iron flat rock flat and the difference between 
 Source: Navistar cast material 

 Cast iron flat rock flat with the main difference is the materials used in their manufacture and processing in different ways. 

 Cast iron plate is made of cast iron plate. The cast iron material for the fine granule of gray cast iron or alloy cast iron. Common processing method for the scraping method, scraping the flat face to accommodate the storage of oil and debris in the tiny ash pit, the increase in the benchmark reflects the reliability and stability. 

 Flat Rock is made of flat rock material, the use of rock materials with fine grain, dense structure of granite, diabase, gabbro and other natural hard rock. Stone wool processing method is to carry out sawing, drilling, after repeated polishing to a mirror sheen Serve. Flat rocks with more wear-resistant, more stable performance. 

 What are the characteristics of cast iron plate 

 Cast iron plate with wear and tear, you can repair scratch again resume its accuracy. 

 Cast iron plate test parts can be painted the color laws flatness, with accurate, intuitive, easy advantages. After scraping the cast iron table base plate drive, the workpiece is relatively smooth, non-astringent feeling, easy to measure, to ensure the accuracy of measurement. 

 Cast iron plate quality and quality of the flat heat treatment have a greater impact on performance: the larger the stress or because of residual deformation of the face; or wear and tear due to impatience can not maintain accuracy; or lack of value because of the difficulties small scrape rough degree. Therefore, attention must be cast iron with cast iron plate material selection, aging and other methods used to eliminate the residual stress in cast iron plate. 

 What rock is characterized by flat 

 Is mainly characterized by flat rocks accuracy and stability, easy maintenance. This is because: 

 ① dense rock flat organizational structure, smooth surface wear, roughness values ??is small; 

 ② rock by long-term natural aging, stress completely disappeared, material stability, not deformed; 

 ③ acid, alkali, corrosion resistance, anti-magnetic; 

 ④ not wet rust, use, and easy maintenance; 

 ⑤ linear expansion coefficient, little affected by temperature; 

 ⑥ face scratched by the collision or after, will only have a pit, no convex pattern, burr, no effect on measurement accuracy. 

 The main disadvantage of flat rock is not to put too much hit, beat, high humidity will be deformed, moisture is 1%. 


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