Broaching tool imitating shape of mantis mouthparts palate and preparation method of broaching tool imitating shape of mantis mouthparts palate

Abstract

The invention discloses a broaching tool imitating the shape of a mantis mouthparts palate and a preparation method of the broaching tool imitating the shape of the mantis mouthparts palate. An existing broaching tool is large in workload, and abrasion of the tool is serious. Grooves are formed in the top faces of tool teeth of the broaching tool; the rise per tooth of a tool tooth part of a tool head is in arithmetic progression distribution; in the direction from a tooth crest to a tooth groove, the gradient change of the area of the cross section of the tool teeth of the tool head and the gradient change of the area of the cross section of the mantis palate are consistent; and the compactness and the hardness of the surfaces of the tool teeth of the tool head are both larger than those of the interior. The preparation method of the broaching tool includes the steps that a mantis palate three-dimensional curved surface model is constructed, the area gradient of the mantis palate is acquired, the area gradient of the tool teeth of the tool head in the direction from the tooth crest to the tooth groove is determined, and the outline of the tool teeth is designed according to the area gradient of the toot teeth; the multiple grooves are machined in the top face of each tool tooth; on the same longitudinal cross section of the tool head, the positions of the grooves in each tool tooth correspond to the top faces of the portions, not provided with grooves, of the tool teeth; and heat treatment of the tool head is performed. The cutting performance of the broaching tool is optimized, the cutting load is reduced, and the service life of the broaching tool is prolonged.

Description

technical field

[0001] The invention belongs to the technical field of mechanical processing, and relates to a broach and a preparation method thereof, in particular to a broach imitating the upper jaw configuration of a praying mantis mouthpart and a preparation method thereof. Background technique

[0002] Broaching is a type of machining operation that uses a broaching machine (broach) to process various internal and external forming surfaces. A broaching machine is a metal cutting machine tool used to create holes or keyways. During processing, generally the workpiece does not move, and the broach performs linear cutting motion. When broaching, the machine tool only has the linear motion of the broach, which is the main motion of the machining process, and the feed motion is realized by the structure of the broach itself. The broach is the key component. The broach is a forming tool used for broaching. There are knife teeth distributed on the broach. When the broach is...

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