Microstructure keyway broach for surfaces of bionic dung beetle elytra, and preparation method thereof

A keyway broach and microstructure technology, which is applied to broaches, broaching machines, manufacturing tools, etc., can solve the problems that the bionic effect needs to be further developed, and the microstructure broaching performance cannot be brought into play, so as to improve the service life and protect the Tool, cutting load reduction effect

CN110102819AActive Publication Date: 2019-08-09HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-08-09

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Abstract

The invention discloses a microstructure keyway broach for the surfaces of bionic dung beetle elytra, and a preparation method thereof. Serious extrusion, friction and wear exist in rake faces and chips in a broaching process of an existing broach. According to the microstructure keyway broach for the surfaces of the bionic dung beetle elytra, and the preparation method thereof, microstructures onthe surfaces of the dung beetle elytra are obtained through scanning, then a single-point diamond tool is produced, and m rows*n columns of bionic microstructures are formed on the rake face of eachbroach tooth in a rough broaching area and a semi-finish broaching area of the broach separately, each bionic microstructure is composed of a central inverted-cone-frustum concave pit and a pluralityof boundary inverted-cone-frustum concave pits which are uniformly distributed in the circumferential direction of the central inverted-cone-frustum concave pit, and the sidewalls of all the boundaryinverted-cone-frustum concave pits communicate with the sidewall of the central inverted-cone-frustum concave pit; and the centers of the top surfaces of all the boundary inverted-cone-frustum concavepits are located in the circumference where the edge of the top surface of the central inverted-cone-frustum concave pit is located. According to the microstructure keyway broach for the surfaces ofthe bionic dung beetle elytra, and the preparation method thereof, the bionic microstructures are formed on the rake faces of the broach, so that the cutting performance of the broach can be optimized, the cutting load is reduced, and the purposes of protecting the broach, reducing the wear of the broach, and prolonging the service life of the broach are achieved.
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Description

technical field

[0001] The invention belongs to the technical field of tool surfaces, in particular to a bionic microstructure keyway broach imitating the surface of a dung beetle elytra and a preparation method thereof. Background technique

[0002] Broaching is a form of machining operations, and broaching is a key component of broaching. During broaching, the broaching makes the surface to be machined in one cut. The broaching machine has only the main motion, and no feed motion. Broaching is widely used in the machining of key parts such as automobiles and aerospace because of its smooth cutting motion and high machining accuracy. However, at this stage, when the broach is used for broaching, there are generally problems such as large broaching load, the cutter teeth are easily bumped or even crushed by the workpiece and chips, and the tool tip is prone to build-up edge, which affects the machining accuracy. How to solve the above problems has become the key to promoti...

Examples

Embodiment Construction

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] like Picture 1-1 , 1-2 As shown in and 1-3, the microstructure keyway broach imitating the surface of the dung beetle elytra of the present invention is made of high-speed steel (W6Mo5Cr4V2), and the specific dimensions of the broach are: the total length is 600mm, the tooth width is b 1 16mm, rake face width b 2 is 2mm, and the number of teeth is 50. Tooth Rake Angle¶ 0 is 12°, the rear angle α 0 is 6°, and the tooth pitch p is 6mm. The first 40 teeth are rough drawing area L 1 , its tooth lift δ i is 0.04mm, and the 41st to 45th teeth are semi-fine drawing area L 2 , its tooth lift δ i is 0.01mm, and the 46th to 50th teeth are the fine drawing area L 3 , its tooth lift δ i is 0mm. Teeth include rake face A 1 , Flank A 3 and blade A 2 , in the rough drawing area L 1 and semi-fine pull area L 2 Each tooth inside the rake face A 1 2 rows × 16 colu...