Hollow drill bit
A hollow drill bit and cavity technology, which is used in repair drilling, drilling tool accessories, drilling/drilling equipment, etc., can solve the problems of inability to perform reaming operation, insufficient cooling of the drill bit, low work efficiency, etc., and achieve extended life. , Wide range of applications, the effect of improving production efficiency
Inactive Publication Date: 2017-11-03
上海汉硕机械技术有限公司
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Problems solved by technology
But in present hollow drill bit, cutting edge all is single cutting edge design, and for example CN102756151A a kind of hollow drill bit of left and right inclined cutting edge, just can only only carry out drilling operation, can not carry out reaming operation, just needs when finishing hole. Changing the tool, even the machine tool, the work efficiency is low, and the cooling of the drill bit is not sufficient, and the cutting fluid cannot fully contact the cutting edge
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0020] Such as Figure 1 to Figure 4 One of them shows: a hollow drill bit, including a first cutting edge 1, a second cutting edge 2, a Morse taper shank 3, a cavity 4, a coolant axial channel 5, a coolant circumferential channel 6, and a coolant guide groove 7; the first cutting edge 1 is arranged on the front end of the hollow drill; the second cutting edge 2 is arranged behind the first cutting edge 1; the Morse taper s...
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The invention discloses a hollow drill bit comprising first cutting edges, second cutting edges, a Morse taper shank, a cavity, cooling liquid axial channels, cooling liquid circumferential channels and cooling liquid guiding grooves. The cooling channels of the hollow drill bit are formed, so that the cutting edges bearing most of cutting resistance and heat is cooled to the maximum extent, and the service life of the drill bit is prolonged. A broached hole and a reamed hole can be formed at a time through the second cutting edges, the production efficiency is improved, and the roughness of the hole surfaces is higher because of the opposite cutter edge directions. The interchangeability of existing machining equipment is guaranteed through the Morse taper shank, and the application range is wider.
Description
technical field [0001] The invention relates to the technical field of mechanical cutting processing equipment, in particular to a hollow drill bit for drilling large-sized holes. Background technique [0002] At present, it is often encountered in machining that it is necessary to drill a large-sized hole. However, when drilling a hole in metal processing, the drill bit is under great stress, especially when the hole is large, the resistance of the drill bit is greater. In order to solve the above problems, people use a hollow drill bit, which is to dig out a cavity in the center of the drill bit, so that when drilling, it is not necessary to drill the metal at the position of the entire hole, but only need to drill a circle of metal. When the hole is drilled, the iron core in the cavity also falls out. But in present hollow drill bit, cutting edge all is single cutting edge design, and for example CN102756151A a kind of hollow drill bit of left and right inclined cutting ...
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IPC IPC(8): B23B51/06B23B51/08
Inventor 黄海霞
Owner 上海汉硕机械技术有限公司