The use of manual scraping on the cast iron scribing platform can ensure good flatness, good contact, and more contact points, and it has a certain hardened surface to enhance the wear resistance. Use a scraper to manually trim the surface shape and roughness of the workpiece, which is called scraping.

cast iron scribing platform

The scraping plane is used for the unquenched cast iron scribing platform, and the boring and milling machine table can make close contact between the two planes. The scraped cast iron scribing platform working surface can form a sliding surface with a lubricating oil film, so it can reduce the wear between the relative moving surfaces and enhance the contact stiffness between the joint surfaces of the parts.

In the correct scraping posture, hold the handle of the knife with your right hand, palm up, and hold the knife with your left hand about 35-50mm from the top of the knife head. Press your thumbs on the knife and roll your fingers under the knife to make your palms close to the knife as much as possible. The movement of the left hand is mainly to press down, direct the direction, and align the position of the knife; hold the handle of the knife with the right hand, make the knife body and the cast iron plate at a certain angle, when pushing forward, straddle the left foot, and the upper body leans forward.

In order to increase the pressure of the left hand and facilitate the observation of the situation in front of the knife (but do not lean forward too much, otherwise it will easily cause back pain). When pushing forward with the right hand, the left hand and waist should be twisted slightly to increase the thrust, otherwise only the right arm does not last for a long time. When scraping, the angle between the blade and the cast iron plate is -25°. The newly sharpened blade has a sharp edge, so the angle should be small, otherwise the blade will be too large. After scraping for a long time, if the cutting edge is blunt, the included angle can be slightly increased.

Jinggong Measuring Tools Producing Co., Ltd is specializing in manufacturing and exporting all kinds of cast iron products，especially for cast iron floor plates, cast iron surface plates, cast iron clamping plates, cast iron angle plates, cast iron box table and other machine tool castings. The products have the features of reasonable design, stable structure, superior quality and competitive price.