Warm congratulations on the successful opening ceremony of "Luoyang Haozhi Machinery Co., Ltd."

Warm congratulations to Luoyang Haozhi Machinery Co., Ltd. on the successful opening ceremony

Our company will participate in the 13th China CNC Machine Tool Exhibition

You are cordially invited to come

Properties of metals

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.

Handling and Inspection

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

Uniform wall thickness, and 3~4mm thin-walled castings are appropriate

High pressure cutting Because the molten metal in the process of filling the cavity under high pressure and high speed, the air in the cavity will inevitably be clamped inside the casting to form subcutaneous pores, so aluminum alloy die castings should not be heat treated, and zinc alloy die castings should not be sprayed on the surface (but can be painted). Otherwise, the internal pores of the casting will be thermally expanded when heated as described above, resulting in deformation or bubbling of the casting.

Machining allowance

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.

The adaptability of sand cutting is very wide

Sand cutting mold, general wood production, commonly known as wood mold. In order to improve the dimensional accuracy is higher, but also often use a longer life of aluminum alloy mold or resin mold. Although the price has increased, but still much cheaper than the metal cutting mold, in the small batch and large production, the price advantage is particularly prominent. Metal Type Cutting

Metal Cutting Applications

Sand cutting adaptability is very wide, small pieces, large pieces, simple pieces, complex pieces, single pieces, large quantities can be used. Sand mold is more refractory than metal mold, so materials with higher melting points such as copper alloys and ferrous metals are also used in this process.

Classification of metal cutting

Metal cutting types modeling methods are customarily divided: ① ordinary sand type cutting, including wet sand type, dry sand type and chemical hardening sand type 3. ② Special cutting, according to the molding material can be divided into natural mineral sand as the main molding material of special cutting (such as investment cutting, mud cutting, cutting workshop shell cutting, negative pressure cutting, solid cutting, ceramic cutting, etc.) and metal as the main casting material of special cutting (such as metal cutting, pressure cutting, continuous cutting, low pressure cutting, centrifugal cutting, etc.).