Taper degree mounting type off-centering machine cutting ferrule material drill

Abstract

The invention provides a taper mounted type eccentric machine trepanning drill which comprises a cutter body, an outer cutter, an inner cutter, a shim, a guidance key, an elastic key, an oil resisting rubber jointing, an oil inletting clearance, a chip removal clearance, a machine card cutter holder and a machine card taper screw. The chip removal clearance is provided with an eccentric machine card of the cutter holder in a coattail shape; the outer cutter and the inner cutter are arranged in the eccentric machine card in a coattail shape at the front part of the machine card cutter holder respectively by machine card taper screw; the tail part of the machine card cutter holder is in a cylinder shape and the upper part of the cylinder is provided with inclined surface in shape of a umbrella with the gradient slope of 2 to 5; the machine card cutter holder tightly fastens the inclined surface in shape of a umbrella in the installing hole of the cutter body by screws; the outer cutter and the inner cutter are provided with at least one chip splitting table respectively; the outer edge of the cutter body is tightly provided with two guiding keys and two elastic keys by screws. The trepanning drill has the advantages of good cutting property, less vibration and good chip breaking effect, can meet the demand of product processing size and can reduce the roughness of the products on the basis of high-speed cutting.

Description

technical field [0001] The invention relates to a metal cutting tool, in particular to a taper-mounted eccentric machine ferrule drill for deep hole processing, which has radial cutting force and eliminates vibration. Background technique [0002] At present, the deep hole casing drill used in the prior art is to weld the cemented carbide blade on the handle with brass, and install the four knives on the annular cutter body through sharpening. The installation height sequence of the knife is different and the chip is separated, especially the cutting edge and the chip breaker are both 90 degrees. Cutting in the annular groove forms a non-radial force balanced cutting. Therefore, the guide key cannot be close to the machined surface. It cannot eliminate vibration and play a good guiding role. In addition, because the cutting edge and the chip breaker are parallel grooves, the chip breaking is poor, and it is even more difficult for materials that are difficult to break. [0...

AI Technical Summary

Problems solved by technology

[0002] At present, the deep hole casing drill used in the prior art is to weld the cemented carbide blade on the handle with brass, and install the four knives on the annular cutter body through sharpening. The installation height sequence of the knife is different and the chip is separated, especially the cutting edge and the chip breaker are both 90 degrees. Cutting in the annular groove forms a non-radial force balanced cutting. Therefore, the guide key cannot be close to the machined surface. It cannot eliminate vibration and play a good guiding role. In addition, because the cutting edge and the chip breaker are parallel grooves, the chip breaking is poor, and it is even more difficult for materials that are difficult to break.

[0003] The Chinese patent number is 92206721.X, and the utility model patent named "tungsten carbide high-speed nesting drill" discloses a high-speed drilling machine with a large processing range, high processing efficiency, and high concentricity and precision when processing deep holes. The nesting drill has played a huge role in the application and has outstanding advantages, but it is not difficult to find in use that although the bottom of the four guide keys of the nesting drill is equipped with oil-resistant rubber pads, it can also play a role. Certain shock absorbing effect, but due to the complex changes in the cutting process, the oil-resistant rubber pad is often crushed and needs to be replaced frequently, and it is difficult to master this replacement technology during operation, and there is also the disadvantage of poor chip breaking effect

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