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New minor-edge multipoint aerial drill

An air drill and auxiliary edge technology, which is used in twist drills, drilling tool accessories, drilling/drilling equipment, etc. The effect of hole efficiency

Inactive Publication Date: 2011-01-26
柳德春 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when drilling titanium alloys, high-strength carbon fiber composite materials and Kevlar fibers, because of the characteristics of the easy shrinkage of the hole diameter after drilling, and the high microhardness of the materials, the drill margins are rapidly worn, and the drilling efficiency is low. Large loss
Although there are continuous innovations of various new drill types (group drills, cross-sharpened aviation drills, French Renault six-sided drills, etc.), the materials for making twist drills have been improved (such as made of polycrystalline diamond, etc.), although the surface coating The application of technology can improve the durability, but the cost of the drill bit has been greatly increased, and the working condition of the drill bit under harsh conditions has not changed

Method used

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  • New minor-edge multipoint aerial drill
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  • New minor-edge multipoint aerial drill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. In figure 1 , figure 2 , image 3 , Figure 4 Among them, the height hv of the micro-step (15) is 0.1mm, the step length f4 is 0.4d, the land width f1 is 0.1mm, and the height difference C from the edge back (1) is 0.15mm higher than that of the standard twist drill , the auxiliary cutting edge relief angle af is 30°, the large inverted cone (19) of the working part of the drill bit is three times that of the standard twist drill of the same specification, and the positive deviation of the diameter is d +0.06 mm, the value of the groove width f2 is 1mm, the value of the groove center distance f3 is 3mm, the grooves (16) are left-right symmetrical or asymmetrical on the two narrow lands (2), and the first groove is slightly There are 6 grooves (16) at 0.2d inside the step.

[0033] 2. In figure 1 , figure 2 , image 3 , Figure 4 Among them, the main cutting edge (8) is a straight edge plus a broken line edge (9), the turning point radius Ro of the broken li...

Embodiment 2

[0035] 1. In Figure 5 , Figure 6 , Figure 7 Among them, the value of land width f1 is 0.1mm, the height difference C from the edge back (1) is 0.15mm higher than that of the standard twist drill, the auxiliary cutting edge relief angle af is 30°, and the large inverted cone (19) of the working part of the drill is 3 times that of the standard twist drill of the same specification, the positive deviation of the diameter is d +0.06 mm, the groove width f2 is 1mm, the groove center distance f3 is 3mm, the grooves (16) are distributed symmetrically or asymmetrically on the two narrow lands (2), and the first groove is at 0.2d , 6 grooves (16) quantity.

[0036] 2. In Figure 5 , Figure 6 , Figure 7 Among them, the main cutting edge (8) is a straight edge plus a broken line edge (9), the turning point radius Ro of the broken line edge (9) is 0.8R, and the broken line angle τ is 15°.

Embodiment 3

[0038] 1. In Figure 8 , Figure 9 , Figure 10 Among them, the height hv of the micro-step (15) is 0.1mm, the step length f4 is 0.4d, the land width f1 is 0.1mm, and the height difference C between the edge back (1) is greater than that of the standard twist drill 0.15mm, the auxiliary cutting edge relief angle af is 30°, the large inverted cone (19) of the working part of the drill bit is 3 times that of the standard twist drill of the same specification, and the positive deviation of the diameter is d +0.06 mm, the value of the groove width f2 is 1mm, the groove center distance f3 is 3mm, the grooves (16) are distributed symmetrically or asymmetrically on the two narrow lands (2), and the first groove is in the micro-step At 0.2d, there are 6 grooves (16).

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Abstract

The invention relates to a new minor-edge multipoint aerial drill, which is characterized by comprising a main cutting edge (8), a broken line edge (9), a micro step (15), a groove (16), a minor-edge multisection edge (6), a narrow margin (2), a minor cutting edge (3) and a large inverted cone (19); the aerial drill is suitable for drilling with high efficiency and high quality of titanium alloy,high-strength carbon fiber composite materials, high-silicon aluminum alloy and the like used commonly in aerospace industry, greatly improves drilling efficiency and drilling quality and durability of drill bit and has excellent axial and lateral cutting performance.

Description

[0001] Field [0002] The present invention belongs to a kind of twist drill, specifically a new auxiliary edge multi-edge aviation drill bit suitable for drilling titanium alloy, high-strength carbon fiber composite material, high-silicon aluminum alloy and other materials commonly used in aviation and aerospace industries . Background technique [0003] The twist drill has been the main hole processing tool for more than 100 years since it was invented. Its manufacturing parameters are basically the same in all countries, so there is also an international standard (iso235-1980), so it is also called the standard twist drill. [0004] Efficient, high-quality holemaking becomes more and more difficult with the increased use of new materials in the aerospace industry. Especially when drilling titanium alloys, high-strength carbon fiber composite materials and Kevlar fibers, because of the characteristics of the easy shrinkage of the hole diameter after drilling, and the high m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/02
CPCB23B2251/085B23B51/02B23B2226/27B23B2251/48B23B2251/44B23B2251/14B23B2222/88
Inventor 周安善柳德春
Owner 柳德春