Metal cutting is to cut metal into shapes that meet certain requirements.
Release time:
2024-01-29
Metal cutting is to cut metal into shapes that meet certain requirements. Cutting blanks because of nearly forming, and to achieve the purpose of no machining or a small amount of processing to reduce the cost and reduce the time to a certain extent, cutting is one of the basic processes of modern machinery manufacturing industry.
Metal cutting is to cut metal into shapes that meet certain requirements. Cutting blanks because of nearly forming, and to achieve the purpose of no machining or a small amount of processing to reduce the cost and reduce the time to a certain extent, cutting is one of the basic processes of modern machinery manufacturing industry.
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The cutting performance of metal includes: ① fluidity, the ability of liquid metal to fill the mold; ② shrinkage tendency, large volume shrinkage from liquid to solid, easy to produce defects such as shrinkage cavity, and large linear dimensional shrinkage, which affects the final dimensional accuracy of castings; ③ hot cracking tendency, some metals and alloys are prone to cracks and segregation tendency in the cutting process.
Mold (liquid metal into a solid casting container) preparation, mold according to the materials used can be divided into sand, metal, ceramic, mud, graphite, etc., according to the number of use can be divided into one-time, semi-permanent and permanent, mold preparation is the main factor affecting the quality of castings
Gravity cutting
It is widely used in the production of various non-ferrous castings, but metal mold cutting also has the disadvantages of low metal utilization rate, difficult pouring of thin-walled complex castings, and low relative pressure cutting of casting tissue density.
When using metal type cutting, the following factors must be considered
When using metal type cutting, the following factors must be considered comprehensively: long manufacturing cycle, high cost, not suitable for single-piece and small-batch production; It is not suitable for cutting complex shapes (especially inner cavities), thin-walled and large castings (metal molds are limited by the size of mold materials and the ability of cavity processing equipment and cutting equipment, so metal molds are not suitable for the production of particularly large castings). The mold is more expensive than sand mold and cheaper than die casting.