Cast iron cutting characteristics

11 5月 2018 | 没有评论 | posted by admin | in Article

In general, the higher the hardness and strength of the cast iron, the lower the metal cutting performance and the lower the expected life from the blade and the tool. Most of the types of metal cutting performance for cast iron used in metal cutting production are generally good. The metal cutting performance is related to the structure, and the harder pearlite cast iron is also more difficult to process. Flaky graphite cast iron and malleable cast iron have excellent cutting properties, and ductile cast iron is rather poor.

The main types of wear encountered when machining cast iron are: Abrasive, adhesive, and diffuse wear. Abrasions are mainly caused by carbides, sand inclusions, and hard cast skins. Adhesive wear with built-up edge occurs at low cutting temperature and cutting speed conditions. The ferrite portion of cast iron is most easily welded to the blade, but this can be overcome by increasing the cutting speed and temperature.

Milling cutter knowledge GG milling cutter

9 5月 2018 | 没有评论 | posted by admin | in Article

Milling cutters There are many types of milling cutters. Ordinary milling machines and numerically controlled milling machines can machine grooves and straight lines roughly, and milling and boring machining centers can process cavities, cores, and curved surfaces.

Generally divided into:

1. Men’s hair milling cutter: rough milling, removal of a large number of rough, facet or object surface of the large horizontal plane or rough outline milling;

2. Ball-end cutter: semi-finishing and fine milling of the surface; the small knife can be used to finish the small chamfer of the steep surface/straight wall.

3. Men’s hair cutter with chamfer, roughing can be removed to remove a large number of rough, but also fine finishing smooth surface (relatively steep surface) small chamfer.

4. Molding cutters: Including chamfering cutters, T-shaped cutters, tooth cutters, and inner R cutters.

5. Chamfering tool, chamfering tool The shape of the chamfering tool is the same as that of the chamfering tool. It is divided into milling cutters with chamfering and chamfering.

6.T-type knife, milling T-slot;

7. Tooth-type knives, milling out a variety of tooth types, such as gears.

8. rough knife, rough milling cutter designed for aluminum copper cutting, can be quickly processed.

Milling cutters usually have two materials: high-speed steel, carbide. The latter is relatively high in hardness compared to the former and has a strong cutting force, which can increase the speed and feed rate, increase productivity, hide the knife, and process difficult-to-machine materials such as stainless steel/titanium alloys.

Milling cutters commonly used on CNC machine tools

8 5月 2018 | 没有评论 | posted by admin | in Article

First, the face milling cutter, the face milling cutter has a cutting edge on the circumferential surface and the end face, and the end cutting edge is a secondary cutting edge.

Second, end mills, end mill cutters on the cylindrical surface and the end surface have cutting edges, they can be cut at the same time, can also be individually cut.

Third, the mold cutter, his structural characteristics are the ball head or end face is not full of cutting edge, circular edge and ball head edge arc connection, can be radial and axial feed.

Fourth, the keyway milling cutter, it has two teeth, cylindrical surface and end surface have cutting edges, the edge of the edge to the center. During processing, the axial feed advances to the groove depth, and then the full length of the keyway is milled in the direction of the keyway.

5. Drum-shaped milling cutter. His cutting edge is distributed on an arc surface with a radius of R. There is no cutting edge on the end face.

Sixth, forming cutters are generally designed and manufactured for specific workpieces or processing contents.