Machining problems The difference between internal chip removal CNC drill bits and high speed steel

1.HSS drill bits.

1) It means that the cutting part of the drill is made of high-speed steel, which is a drill bit that has been used for a long time in the machining industry.

2) It is often used for drilling workpieces with surface hardness lower than HRC32, and is suitable for low-speed ordinary machine tools.

3) The hardness of high-speed steel drill bits is relatively low, the life is short, the manufacturing process is complex, and there is a tendency to be replaced by other forms of drill bits.

2.CNC drill bits for internal chip removal, I haven't heard of it yet. However, there are several large diameter deep hole drills that use internal chip evacuation:

1) BTA deep hole drilling: cutting fluid is fed from the gap between the drill pipe and the hole wall, and the chips are discharged from the inner hole of the drill pipe by the pressure of the cutting fluid. BTA deep hole drilling is suitable for drilling deep holes with a hole diameter of more than 6 mm and a hole depth to hole diameter ratio of less than 100, and its production efficiency is more than 3 times higher than that of gun drilling.

2) Jet drill: a kind of multi-bladed deep hole drilling with internal chip removal, with two layers of inner and outer drill pipes, most of the cutting fluid enters the cutting zone from the gap between the inner and outer drill pipes, and then enters the inner pipe together with the chips; A small portion of the cutting fluid enters the inner tube through a crescent-shaped hole at the end of the inner tube, creating a jetting effect that creates a low-pressure zone that helps to suction the chips. The jet drill does not require a strict cutting fluid sealing device, and is suitable for drilling deep holes with a diameter of more than 18 mm and a hole depth and hole diameter ratio of less than 100.

3) DF deep hole drilling: This kind of drill bit absorbs the advantages of BTA deep hole drilling and jet drilling, using a single tube, the chip removal relies on the dual action of pushing and suction, which improves the chip removal capacity, and can drill deep holes with a hole diameter of more than 8 mm.

3.Generally, when the diameter is less than 10 mm, it is mostly processed by gun drilling.

4.Deep hole drilling (internal chip evacuation) is not the same thing as a high-speed steel drill bit.

Summary. Hello dear. The answer to this question you have asked is as follows: deep hole drilling can be divided into (double-edged type) and (single-edge type) according to the number of cutting edges, and can be divided into two categories: internal chip removal and (external chip discharge) according to the chip removal method.

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

Deep hole drilling can be divided into (

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Among the cutting amounts, the one that has the greatest influence on the cutting temperature is ( ), followed by ( ), and the one with the least impact is ( ).

And ( ) can be divided into and ( ) according to the chip removal method

The selection of cutting speed in finishing is mainly limited by ( ) and ( ).

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And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

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And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

And ( ) can be divided into and ( ) according to the chip removal method

Deep hole drilling can be divided into (

CNC deep hole drillingIt is necessary to reasonably select the cutting amount according to the material of the workpiece, control the curl degree of cutting, and obtain a C-shaped cut that is easy to discharge. When processing high-strength material workpieces, the cutting speed should be appropriately reduced, and a smaller feed can be used on the premise of ensuring network breakage. The high-pressure coolant must reach the tip of the tool to keep the tool and workpiece cool.

and force the drill cuttings to be crushed and scoured out under high pressure.