Chip breaking drill bit with S-shaped cutting edge based on Logistic curve

A cutting edge and chip breaking technology, which is applied to twist drills, cutting blades, manufacturing tools, etc., can solve the problems of easy entanglement and difficult chip breaking, and achieve the effects of preventing chip entanglement, ensuring processing quality, and improving processing efficiency

Active Publication Date: 2016-11-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of difficult chip breaking and easy entanglement of the existing drill bit structure in the titanium alloy drilling process, the present invention provides a kind of drill with good rigidity, long tool life, and good chip breaking and chip removal performance based on the Logistic curve with an S-shaped chip breaking drill

Method used

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  • Chip breaking drill bit with S-shaped cutting edge based on Logistic curve
  • Chip breaking drill bit with S-shaped cutting edge based on Logistic curve
  • Chip breaking drill bit with S-shaped cutting edge based on Logistic curve

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Embodiment Construction

[0015] Based on the Logistic curve of the present invention, there is a chip-breaking drill with an S-shaped cutting edge, the material is cemented carbide, and its structure is as follows: figure 1 figure 2 and image 3 Shown, including shank 1 and cutting part 2. The cutting part mainly includes a main cutting edge 4, a chisel edge 3, a minor cutting edge 5 and a chip flute 6.

[0016] The main cutting edge 4 is mainly composed of a rake face and a flank face, and each point on the main cutting edge satisfies the Logistic curve equation y=1 / (1+2e x ), taking the line connecting the outer edges of the two main cutting edges as the x-axis, the central axis as the y-axis, and the intersection of the x-axis and the y-axis as the origin. The edge shape is S-shaped, which can promote chip deformation, reduce the contact area between chips and the machined surface, improve the chip breaking ability of the tool, and ensure the processing quality.

[0017] The main cutting edge ...

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Abstract

The invention discloses a chip breaking drill bit with an S-shaped cutting edge based on a Logistic curve. The chip breaking drill bit is provided with a handle part and a cutting part. The cutting part comprises a chisel edge, two main cutting edges, two auxiliary cutting edges and a chip accommodating groove. Each main cutting edge comprises a front tool face and a rear tool face. All points on each main cutting edge meet the curve equation which is that y=1 / (1+2e<x>). The front angle and the rear angle of the edge part of each main cutting edge are respectively 15 degrees and 8 degrees. The vertex angle of the cutting edge is 135 degree. The length of the chisel edge is 0.6 mm. The helical angle of each auxiliary cutting edge is 40 degrees. The drill bit is based on the Logistic curve, and through the setting of the edge types and the structure parameters of the main cutting edges, chip bending during the cutting process is promoted effectively, the chip deformation degree is increased, the chip breaking capability of a tool is improved, continuous unit chips are prone to be generated, chip winding is prevented, chips are discharged smoothly, the processing quantity is ensured, the processing efficiency is improved, and the service life of the tool is prolonged.

Description

technical field [0001] The invention relates to a chip-breaking drill used for drilling titanium alloy workpieces, and belongs to the technical field of drilling tools. Background technique [0002] With the rapid development of aerospace, automobile industry, medical equipment, petrochemical and other fields, the performance requirements of materials are getting higher and higher. Titanium alloys are widely used because of their high specific strength, high hardness and excellent corrosion resistance. However, due to the high chemical activity, small elastic modulus, and low thermal conductivity of titanium alloys, it is easy to cause problems such as severe tool wear, high cutting temperature, and easy entanglement of chips. It is a typical difficult-to-machine material, especially in the drilling process. , is semi-closed processing, if the chips are unreasonably broken and discharged smoothly, it will easily lead to blockage of the chip pocket and increase the cutting re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/02
CPCB23B51/02B23B2200/328
Inventor 国凯朱兆聚孙杰刘凯
Owner SHANDONG UNIV
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