Providing deep-holes with an oblong cross-section and corresponding tools
A technology of oblong and deep holes, which is applied in the direction of manufacturing tools, boring/drilling, metal processing equipment, etc., and can solve problems such as large flow resistance
Inactive Publication Date: 2012-05-23
PAUL WURTH SA
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Problems solved by technology
However, cooling channels made of drilled overlapping deep holes still have the disadvantage that the cross-sectional shape according to CN 2 521222 Y is not optimal in terms of application or reduction of cooling wall thickness, and in terms of hydrodynamics , channels of this shape exhibit relatively large resistance to flow
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[0030] figure 1 A first plunge milling tool 100 is shown, specifically its front portion 102 . Such as figure 1 As shown, the plunge milling tool 100 has an elongated support 106 that supports a cylindrical end mill 110 at the front 102 of the plunge milling tool. Cylindrical end mill 110 is mounted for rotation about an axis R1 which is perpendicular to the longitudinal axis A of elongate support 106 and parallel to Figure 3C The main axis M1 of the oblong section to be formed is shown. The penetration direction P of the plunge milling tool 100 is located at figure 1 on the axis A shown.
[0031] The cylindrical end mill 110 is driven by a drive shaft 112 . The drive shaft 112 is arranged eccentrically parallel to the axis A inside the elongated support 106 . The drive shaft 112 is between the front part 102 and the rear part ( figure 1 not shown, but with Figure 4 similar to the rear portion shown in ), where the drive shaft 112 may be coupled to the driver. A bev...
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Abstract
Plunge milling tools (100, 200) for providing deep holes (DH1, DH2) with long circular cross sections (20, 40) comprise: slender support components (106; 206) with front parts (102; 202) and a rear part (204); at least one pair of guide components (130, 132; 230, 232) which are transversely arranged on the slender support component and suitable for applying pressure to the relatively semi-cylindrical surfaces (11, 12) of two off-center depth holes so as to steady the front part of the slender support component. The tool comprises at least one milling cutter (110; 210, 211) mounted to be rotary at the front end of the slender support component; and transmission mechanisms (112, 114, 120, 213, 215, 223) for transmitting the power to the front part from the rear part and driving the milling cutter. The milling cutter is configured to remove rest materials (A1, A2, A3; A4, A5) between two relatively semi-cylindrical surfaces (11, 12) of two off-center depth holes so as to gradually form passages (20, 40) with long circular cross section along the length direction of the deep hole during the period of plunge milling.
Description
technical field [0001] A deep hole is defined by a large ratio between the depth of the hole and the diameter, usually much greater than three. Deep holes are usually accomplished with the aid of what is known as a deep hole drilling machine, sometimes called a gun hole drilling machine. Due to this drilling method, the deep hole has a circular cross-section. The present invention relates generally to the field of machining and, more particularly, to the field of transforming a deep hole arrangement of two or more deep holes into a channel with an oblong cross-section. Corresponding tools and methods for providing deep holes with an oblong cross-section are proposed. [0002] Although there are other possible applications, the main application envisaged for the proposed tool and method is in cooling plates in general and in cooling staves for shaft furnaces such as blast furnaces in particular , providing relatively long internal coolant passages. The length of the interna...
Claims
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IPC IPC(8): B23C5/16B23C5/28B23C3/26F27D1/12
CPCB23B41/04
Inventor 埃米尔·洛纳尔迪吉勒斯·诺斯比施泽格·德维莱特
Owner PAUL WURTH SA