Bridge type flat ruler

Bridge type flat ruler,also known as bridge ruler,is a flat ruler shaped gauge used for coloring,indicating the flatness of flat plates,long guides,etc.It is also commonly used for checking the straightness of workpiece edges using the light gap method.

The bridge type flat ruler is manufactured according to the JB/T7977-99 standard,made of HT250 material.The working surface adopts scraping and grinding technology,and the operating temperature is(20plusmn5)℃.The working surface requires that there should be no sand holes,pores,cracks,slag inclusions,shrinkage,scratches,scratches,rust spots,and other defects that seriously affect the appearance and performance.Type bearings are large and heavy,with high value,mostly produced in single pieces or small batches,and have tight delivery times for products or important engineering matching.They belong to high-precision and cutting-edge technology products.To measure it,the measurement methods and tools required.The inner diameter,outer diameter,raceway,and inner cone standard parts are replaced by bridge rulers equipped with side blocks,which can achieve the effects of simple operation,convenient use,accurate measurement,and economic savings.Therefore,the bridge ruler has been selected as a commonly used measuring tool in the production of type bearings,and mastering the detection method of this measuring tool is extremely important.

How is a bridge type ruler measured?

Bridge type flat ruler is a ruler shaped gauge with a flat surface,mainly used to check the flatness of flat plates,long guide rails,etc.using coloring and indicator methods.It is also commonly used to check the straightness of workpiece edges using the light gap method.It is generally made of cast iron,and rectangular flat rulers are also made of bearing steel or granite.

In daily use,don't just use it and forget the maintenance work of the bridge type ruler.Below,Baichang Machinery Measuring Tools Co.,Ltd.in Botou City lists several maintenance methods for bridge type rulers.

1.The bridge ruler is easy to store and can be hung flat,without affecting its straightness and parallelism due to long-term flat placement.

2.Bridge rulers are not easy to rust when stored,and do not need to be coated with oil during use.If not used for a long time,apply a thin layer of general industrial oil when stored to prevent rust from affecting accuracy.

3.In order to improve the service life and working accuracy of the bridge ruler,it is recommended to control the scraping and grinding to be above 0.02mm,so that the bridge ruler can have a longer service life and calibration cycle.According to relevant information on scraping and grinding,as well as the data obtained from scraping and grinding,this processing requirement can be met.

4.Check the micro quality of the working surface of the bridge ruler,that is,the flatness of small peaks and valleys.The micro quality of the surface is good to ensure the service life of the bridge ruler.5.Precautions:Before work,inspect the tools and strictly prohibit the use of unqualified tools such as corrosion,deformation,looseness,failure,and damage.