The guide post and the guide sleeve are standard parts in the tungsten steel mold. The main structure of the guide post and the guide sleeve is a coaxial cylindrical surface with different diameters. The material selection can be directly selected according to the structural size and material requirements of the guide post. The hot rolled round steel is a blank material, which is ground after carburizing and quenching.
The tungsten steel mold guide post is mounted on the lower mold base, and the guide sleeve is mounted on the upper mold base. The clearance between the guide post and the guide sleeve is required to be smaller than the gap between the punch and the die.
The core of the tungsten steel mold guide column requires good toughness. Generally, the material used is 20 low carbon steel. The length of the blank should be considered for the length of the clamping during turning. The outer circle should have a cutting allowance of 3-4 mm. The outer circle after turning should be Leave a grinding allowance of 0.5mm, the depth of the permeable layer is 0.8-1.2mm, and the surface hardness after quenching is 50-55HRC. Grind the outer circle on the cylindrical or universal grinding machine. After grinding, the grinding allowance should be 0.01-0.015. Mm, the purpose of the grinding process is to further improve the surface quality of the guide post, in order to eliminate the defects such as the deformation of the neutral hole at both ends of the guide post caused by the heat treatment, the guide post should be corrected after the heat treatment, so that the guide hole will be guided in one clamping. The two outer faces of the column are ground to ensure the coaxiality of the cylindrical surface.https://www.xhychromerod.com/