The difference between non-standard tools and standard tools

Due to the production of ordinary metal or non-metallic parts cutting surface measurement of standard tools, workpiece and hardness increases when the over heat treatment, or stainless steel and other workpieces are more likely to stick to the knife, with some surface shape workpiece complex, or the machined surface roughness and other circumstances have a higher standard, standard tools can no longer meet the processing needs.

Therefore, in the production and processing process, the material of the tool, the geometry of the cutter, geometric angle, etc. need to be designed and made, which can be divided into two categories that do not require customization and need customization. Customized. Tools that do not require customization mainly solve two problems, such as size problems and surface roughness problems.

If it is a size problem, you can choose a standard tool with a size similar to the desired size. It can be solved by transformation grinding, but two points should be noted.

1) The size difference should not be too large, usually not more than 2mm, because too large a size difference will cause changes in the tool groove shape, which will directly affect the chip tolerance space and geometric angle.

2) If it is an end mill with side holes, it can be changed to a normal machine tool for grinding at low cost, but if it is a keyway tool without side holes, it cannot be done on a normal machine tool and needs to be changed to a special five-axis machine tool for grinding, which will be more costly.

If it is a problem of surface roughness, it can be achieved by changing the geometric angle of the cutting edge, such as increasing the number of degrees of the front and rear angle, which will significantly improve the surface roughness of the workpiece. However, if the user's machine tool is not rigid enough, the edge may become blunt but can improve the surface roughness, which is a complicated matter and requires analysis of the machining site before drawing a conclusion.