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Machining features of large cast steel castings and selection of cutting blades

  date:2015-08-27 09:53:20

Common problems in machining of large cast steel parts

1, the steel containing manganese, chromium, nickel caused by cutting tool wear, especially some large steel castings, a lot of tool machining endless a workpiece has been damaged, cause scar even the "knife", and to a lesser extent affect machining efficiency and quality, caused severe workpiece scrapped!
2, there is sand, chill casting defects or intermittent turning, breaking knife, resulting in high cost of tool.

The selection of the numerical control blade in the process of cast steel:

At present, a lot of tool engineers and some steel castings processing factory, often choose the YT type alloy cutter head or for the P type of metal processing coating carbide cutting tools, in fact not;

1, we want to jump out of the steel parts on the use of YT type alloy knife head machining, cast iron parts on the use of YG type knife head, because the steel is a short chip material, which is different from the forged steel parts! In particular, the use of YT type alloy cutter head, the general will collapse if the use of type of steel castings!

2, if the use of YG type alloy or coating carbide blade, the phenomenon of a broken knife, it can not be the responsibility of a simple YG type of knife head does not impact, in fact, is the reason for its non wear

The correct selection of machining tool material for cast steel

1, if it is a single occasionally production, rough machining can be selected YG alloy knife head, concrete before and after the angle grinding angle and cutting cast iron pieces of similar, according to the machining process and machine system with rigid grinding suitable angle of the main tool; if low rigidity of the system, the main angle by 83 degrees or 90 degrees (specific according to the end face and shoulder processing needs) if the rigidity of the machine tool and clamping force is good, as far as possible the use 45 degrees angle tools.

2. If it is regular lot of processing, steel casting, Valin super hard BN-s20 is specifically for steel castings and processing research and development of a machine clip grades for indexable inserts; BN-S20 grades is HLCBN tool itself red hard hard alloy and ceramic tools than high, and than ceramic tools impact, a large amount of experiments and case prove its life is coated alloy tools several times to several times. BN-S20 grade can be used for rough machining, it can also be used for semi finishing and finishing alloy steel castings to improve the processing efficiency. The utility model is suitable for machining of large steel castings and also is suitable for high temperature alloy, heat resistant steel, high hardness steel / cast iron, hardened steel, nitrided steel, permeability machining of carbon steel and other materials with high hardness. And in the rough machining performance.

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