CN204108415U

CN204108415U - A kind of fluted drill being used for machining titanium alloy

Info

Publication number: CN204108415U
Application number: CN201420482265.5U
Authority: CN
Inventors: 于胜平
Original assignee: HARBIN DONG'AN LIFENG CUTTER CO Ltd
Current assignee: HARBIN DONG'AN LIFENG CUTTER CO Ltd
Priority date: 2014-08-26
Filing date: 2014-08-26
Publication date: 2015-01-21
Anticipated expiration: 2024-08-26

Abstract

The utility model discloses a kind of fluted drill being used for machining titanium alloy, relate to fluted drill structure, be specifically related to a kind of fluted drill in order to machining titanium alloy.Comprise spiral bit (2) and handle of a knife (3), spiral bit (2) and handle of a knife (3) are structure as a whole; The welding edges of spiral bit (2) and handle of a knife (3) together and central shaft coincide; The end of spiral bit (2) is conical chip head (1).The utility model solves the problems such as the fluted drill working (machining) efficiency existed in prior art is low, quick abrasion.

Description

A kind of fluted drill being used for machining titanium alloy

Technical field

The utility model relates to fluted drill structure, is specifically related to a kind of fluted drill in order to machining titanium alloy.

Background technology

Fluted drill is with the instrument of the circular hole of drilling workpiece by the rotary cutting of its relative fixed axis.Be similar to fried dough twist because of its chip pocket curl and gain the name.Helicla flute has 2 grooves, 3 grooves or more groove, but the most common with 2 grooves.Fluted drill can be clamped on manual, electronic Handheld drill instrument or drilling machine, milling machine, lathe and even machining center and use.Drill bit material is generally high-speed tool steel or carbide alloy.

Along with the extensive use of titanium alloy, titanium alloy has heat conduction, temperature diffusivity is little, and chip temperature is high, and chip deformation coefficient is little, and the cutting force in unit are is large.Due to shortcomings such as above characteristic cause in process, and tool sharpening efficiency is low, and tool wear is fast.

Summary of the invention

The utility model provides a kind of fluted drill being used for machining titanium alloy, solves the problems such as the fluted drill working (machining) efficiency existed in prior art is low, quick abrasion.

For solving the problem, the utility model adopts following technical scheme: a kind of fluted drill being used for machining titanium alloy, and comprise spiral bit 2 and handle of a knife 3, spiral bit 2 and handle of a knife 3 are structure as a whole; Spiral bit 2 together with the welding edges of handle of a knife 3 and central shaft coincide; The end of spiral bit 2 is conical chip 1.

The helical angle size of spiral bit 2 is 20-24 degree; The conical cone angle of chip 1 is 138-142 degree; Preferably, the helical angle size of spiral bit 2 is 21-23 degree; The conical cone angle of chip 1 is 139-141 degree.

Between the edge, junction of spiral bit 2 and handle of a knife 3 and the central shaft of spiral bit 2, angle is 28-32 degree; Preferably, between the edge, junction of spiral bit 2 and handle of a knife 3 and the central shaft of spiral bit 2, angle is 29-31 degree.

The outermost diameter of spiral bit 2 is 1.6-1.7 millimeter; Preferably, the outermost diameter of spiral bit 2 is 1.62-1.68 millimeter.

Advantage of the present utility model: the utility model selects the best angle of fluted drill by lot of experimental data, solves the difficult processing problems of titanium alloy small diameter drill bit, adds the working (machining) efficiency of fluted drill; The utility model utilizes numerical control tool grinder and special type emery wheel to process the drill bit of applicable machining titanium alloy, decreases the wearing and tearing to fluted drill.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation;

Fig. 2 is chip head left view in Fig. 1.

Symbol description in figure: 1 for chip head, 2 be spiral bit, 3 be handle of a knife.

Detailed description of the invention

By best embodiment, the utility model is described in detail below .

As shown in Figure 1, a kind of fluted drill being used for machining titanium alloy, comprise spiral bit 2 and handle of a knife 3, spiral bit 2 and handle of a knife 3 are structure as a whole; Spiral bit 2 together with the welding edges of handle of a knife 3 and central shaft coincide; The end of spiral bit 2 is conical chip 1.

Fluted drill of the present utility model adopts high-speed steel to be material, and high-speed steel is a kind of tool steel with high rigidity, high-wearing feature and high-fire resistance, also known as high-speed tool steel or high-speed steel, is commonly called as Bai Gang.The processing performance of high-speed steel is good, and intensity and toughness are worked good, and is therefore mainly used to manufacture complicated thin sword and impact-resistant metal cutting tool, also can manufacture high-temperature bearing and cold extrusion die etc.Except the high-speed steel produced with method of smelting, there is again PM HSS in the sixties in 20th century later, and its advantage is that of avoiding smelting process and produces the carbide segregation that causes and cause mechanical performance to reduce and heat treatment deformation.Adopt carbide alloy effectively to prevent fluted drill to be damaged, and improve its service life.

The utility model is transformed existing fluted drill, through being experimental implementation in a large number, draws following parameter:

The helical angle size of spiral bit 2 is 20-24 degree; The conical cone angle of chip 1 is 138-142 degree; The scheme that optimum is chosen is, the helical angle size of spiral bit 2 is 22 degree; The conical cone angle of chip 1 is 140 degree.

Between the edge, junction of spiral bit 2 and handle of a knife 3 and the central shaft of spiral bit 2, angle is 28-32 degree; The scheme that optimum is chosen is, between the edge, junction of spiral bit 2 and handle of a knife 3 and the central shaft of spiral bit 2, angle is 30 degree.

The outermost diameter of spiral bit 2 is 1.6-1.7 millimeter; The scheme that optimum is chosen is, the outermost diameter of spiral bit 2 is 1.65 millimeters.

Titanium alloy has heat conduction, temperature diffusivity is little, and chip temperature is high, and chip deformation coefficient is little, and the cutting force in unit are is large, is unfavorable for cutting.Adopt the fluted drill that above-mentioned geometric parameter improves, effectively add cutting ability, increase work efficiency, solve high-speed steel tool in the short-life problem of machining titanium alloy material, and by optimizing chip performance during cutter parameters raising carbide drill machining titanium alloy material.

Last it is noted that obviously, above-described embodiment is only for the utility model example is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection domain of the present utility model.

Claims

1. be used for the fluted drill of machining titanium alloy, it is characterized in that, comprise spiral bit (2) and handle of a knife (3), spiral bit (2) and handle of a knife (3) are structure as a whole; The welding edges of spiral bit (2) and handle of a knife (3) together and central shaft coincide; The end of spiral bit (2) is conical chip head (1);

The helical angle size of spiral bit (2) is 21-23 degree; The conical cone angle of chip head (1) is 139-141 degree;

Between the edge, junction of spiral bit (2) and handle of a knife (3) and the central shaft of spiral bit (2), angle is 29-31 degree;

The outermost diameter of spiral bit (2) is 1.62-1.68 millimeter.