Crossed platform also called crossed the plate, it belongs to the cast iron platform series. Cast iron crossed platform is one of our flagship product. Its main purposes: as a basic tool for precision parts crossed, machinery, engine power test, commissioning, has good stability and toughness plane is flat benchmark gauges for the workpiece detection or crossed. Crossed platform specifications at 200 × 200-3000 × 6000mm, special specifications according to customers drawings made or agreed upon production and processing. Crossed plate production processes are generally strictly a "People's Republic of China Machinery Industry Standard" JB / T 7974-2000 processing and production. Cast iron platform concept design must be based on the lowest cost to achieve the best results, crossed platform production processes in strict accordance with international standards, inspection standards a "People's Republic of China Machinery Industry Standard" JB / T 7974-1999. Inspection is generally divided into flat blank test, whether machined and finished product testing testing twice a rough flat appearance main test specifications can meet the technical requirements, and there is no internal defects rough; plate machining cast iron plate test mainly aimed at testing there is no sand holes, pores, cracks, sand, shrinkage and processing errors, etc; flat product testing whether the test is mainly cast iron plate flatness and appearance requirements and specifications can be achieved. Flat in the production process, will produce some theoretical weight deviation should be noted that whether the use of flat plate bias will affect. Generally flat design should take into account the error of casting and machining errors, flat weight error should not normally exceed 10% crossed platform according to the national standard verification procedures, the level is divided into four grades 0,1,2,3. Scribing platform: dash design is based on the size of the request, with the stylus tool on rough or semi-finished parts to be machined to draw contour lines (or process boundaries), or as a reference point, an operating line Methods. In single or small batch production, with crossed checks or semi-rough shape and size, a reasonable allocation of allowance each machined surface, early detection of substandard goods, avoid wastage of the subsequent processing steps. Proper use of scribing tool, draw lines to be accurate, clear; after the dash is completed, to repeatedly check the size, can be machined. Dash is a complex and detailed important work, if the fault is crossed, it will cause the workpiece scrapped. So crossed directly related to the quality of the product. On the dash requirements are: size is accurate, correct position, clear lines, red eyes evenly.