Graphite Molds For Metal Casting are highly precise and durable molds used to produce complex metal parts. They are made of graphite, a material known for its high-temperature resistance, good thermal conductivity, and low thermal expansion.Graphite Molds For Metal Casting

Quality problems and solutions that are prone to occur when turning slender shafts

When turning slender shafts, due to the poor rigidity of the workpiece itself, improper adjustment of auxiliary tools such as the center frame and follower frame can result in the geometric shape and surface quality not meeting the requirements, mainly in the following aspects:Graphite Molds For Metal Casting

The workpiece has a large aspect ratio and poor rigidity; The effects of radial cutting force and centrifugal force during turning cause thermal deformation, elongation, and cutting stress in the workpiece; Due to various reasons such as the fact that the raw material itself is a deformed rod, it can cause the workpiece to bend.Graphite Molds For Metal Casting

The solution is to use a center frame and a follower frame to increase the rigidity of the workpiece; Reasonably select the geometric angle of the cutting tool (mainly large rake angle and large main rake angle), reduce radial cutting force, and minimize the generation of cutting heat; Using spring tips to reduce the adverse effects of workpiece linear expansion, fully pouring cutting fluid, reducing friction and quickly taking away the generated heat, necessary heat treatment is carried out on the blank or workpiece.Graphite Molds For Metal Casting

If the raw material itself or during processing is bent, it should be straightened in a timely manner before continuing turning. Suitable methods such as hot forging straightening, cold pressing straightening, impact straightening, prying straightening, simple tool straightening, quenching straightening, and anti twist groove straightening can be selected according to needs.Graphite Molds For Metal Casting

Graphite Molds For Metal Casting