Internal cooling stepped drill capable of inhibiting burrs of drilling outlet
A kind of drilling processing and step drilling technology, which is applied in the direction of step drilling, manufacturing tools, metal processing equipment, etc., can solve the problem of many export burrs, achieve the effect of increasing life, reducing cost and solving many burrs
Inactive Publication Date: 2019-12-13
XIAN FASHITE AUTOMOBILE TRANSMISSION CO LTD
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Problems solved by technology
[0005] The invention provides an internally cooled stepped drill capable of suppressing burrs at the drilling outlet, aiming to solve the problem of more burrs at the drilling outlet in the prior art
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[0036] In order to make the purpose, advantages and features of the present invention clearer, the internal cooling stepped drill proposed by the present invention to suppress the burr at the drilling outlet will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will be more clear from the following specific embodiments. It should be noted that: the drawings are all in a very simplified form and use inaccurate proportions, which are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention; secondly, the structures shown in the drawings are often actual structures part.
[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] The present invention is an inner-cooled stepped drill capable of suppressing burrs at the drilling outlet, co...
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Abstract
The invention relates to an internal cooling stepped drill capable of inhibiting burrs of a drilling outlet. The internal cooling stepped drill capable of inhibiting burrs of the drilling outlet aimsto solve the problem of more burrs at a drilling outlet in the prior art. The internal cooling stepped drill capable of inhibiting burrs of the drilling outlet comprises a first cutting part, a conical transition part, a second cutting part and a drill body which are sequentially and coaxially connected from left to right; the left end of the first cutting part is a drill tip angle, and the angleof the drill tip angle is smaller than 180 degrees; the included angle between the generatrix of the conical transition part and the central axis of the first cutting part is 40-50 degrees; the outerdiameter of the second cutting part is larger than the outer diameter of the first cutting part, the left end face of the second cutting part is a plane, and the plane is perpendicular to the axis ofthe second cutting part; the outer diameter of the second cutting part is larger than the maximum diameter of the conical transition part; and each of the first cutting part and the second cutting part is provided with a plurality of spiral blades.
Description
technical field [0001] The invention relates to drilling, in particular to an inner-cooled stepped drill capable of suppressing burrs at the exit of drilling. Background technique [0002] Drilling technology is one of the effective methods for hole forming, which occupies a large proportion in machining. During the drilling process, more or less burrs will appear at the bottom of the hole. There are many reasons for the burrs at the bottom of the drilling hole, such as workpiece material, machine tool cutting fluid, drill structure, drill angle, cutting amount, etc. Due to the burr It may affect the use of the product, and may even cause serious accidents, so it should not be underestimated. Deburring is often an indispensable process in the workshop. There are many ways to remove burrs. Most of them are removed by tools such as files, and deburring robots are used for grinding and removal. No matter which method is used, it is time-consuming and labor-intensive, and the c...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B23B51/00B23B51/06
CPCB23B51/009B23B51/06B23B2251/04B23B2251/14
Inventor 余昌水杨永星冶敏
Owner XIAN FASHITE AUTOMOBILE TRANSMISSION CO LTD