CN202087876U

CN202087876U - An indexable expanding drill

Info

Publication number: CN202087876U
Application number: CN201120146514XU
Authority: CN
Inventors: 范晖; 唐弘斌; 张卫群; 陈英
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2011-05-10
Filing date: 2011-05-10
Publication date: 2011-12-28
Anticipated expiration: 2021-05-10

Abstract

An indexable expanding drill comprises a drill body and a guiding head disposed on the drill body. The drill body is provided with a double-spiral tailing discharging groove; the guiding head is provided with two symmetrical outer edges, which are indexable blades; and the blades are disposed on the outside of the guiding head symmetrically. The indexable expanding drill reduces generation of throw of eccentric during cutting, has improved rigidity, reduces occurrence of vibration, improves cutting efficiency, is capable of discharging the tailing outward and holding the tailing automatically during cutting, and reduces friction of the drill body.

Description

A kind of indexable reamer

Technical field

The utility model relates to a kind of indexable reamer.

Background technology

In station boiler, the collecting box pipe seat adopts all size pipe in a large number, for guaranteeing the welding assembly quality, requires the internal diameter size of pipe to unify, and therefore need carry out reaming processing to ips, and length L is seen Fig. 1 with ratio＞6(structure of aperture D).

Self-feeding is adopted in the processing of this type of part at present, digital control processing, so cutting tool requires uniformity and has certain durability, assurance product precision and efficient.Existing indexable rotary head is the shallow hole drilling (see figure 2) on the market, maximum depth of cut is at 4 times of diameters, this shallow hole drilling adopts inside and outside two blades, the high alloy blade of wearability is as outside 11, the high blade of toughness is as inner edge 22, inner edge 22 is the centering effect during cutting, and outside 11 cuts, so this drill bit has certain advantage for boring solid hole.But for reaming, this drill bit problem is bigger, the position of inner edge 22 and outside 11 asymmetric (as shown in Figure 3), there is angle β between inner edge 22 and the outside 11,, only relies on the outside machining because inner edge does not participate in the cutting location, be easy to generate offset distance and vibration, tool life is poor.

The utility model content

A kind of indexable reamer that the utility model provides has improved working (machining) efficiency and crudy.

In order to achieve the above object, the utility model provides a kind of indexable reamer, and this reamer comprises cutter hub and the guide head that is arranged on the cutter hub;

Cutter hub is provided with the double helix flute;

Guide head is provided with the outside of two symmetries.

Cold machining liquid hole in also being provided with on the described guide head.

Described cutter hub adopts the 40Cr steel.

The diameter of described guide head is than the big 1 ~ 1.2mm of cutter hub diameter.

The width of described double helix flute is 1/4 ~ 1/5 of a cutter hub circumferential length, and the degree of depth is 1/3 of a cutter hub diameter.

Described outside adopts indexable insert tip, throw away tip, and the blade symmetry is installed in the guide head outside.

The utility model has reduced the generation of working angles eccentric throw, improves the cutter rigidity, reduces generation of vibration, has improved stock-removing efficiency, has guaranteed in the working angles, and chip removal outward and appearance bits ability reduce the cutter hub friction automatically.

Description of drawings

Fig. 1 is the tube construction schematic diagram that needs reaming in the background technology;

Fig. 2 is the structural representation of shallow hole drilling in the background technology;

Fig. 3 is the side direction structural representation of shallow hole drilling in the background technology;

Fig. 4 is the structural representation of a kind of indexable reamer of providing of the utility model;

Fig. 5 is the side direction structural representation of a kind of indexable reamer of providing of the utility model.

The specific embodiment

Following according to Fig. 4 and Fig. 5, specify preferred embodiment of the present utility model:

As shown in Figure 4, be a kind of indexable reamer that the utility model provides, it comprises cutter hub 2 and the guide head 1 that is arranged on the cutter hub 2;

Described cutter hub 2 adopts the 40Cr steel;

In the present embodiment, the diameter of described guide head 1 is than the big 1mm of cutter hub diameter, to reduce the friction of cutter hub and workpiece;

Cutter hub is provided with double helix flute 201, and this double helix flute 201 strengthens the spiral fluted degree of depth and width as far as possible under the situation that satisfies cutter hub rigidity, and requires the helicla flute slyness bright and clean;

The general value of the width of double helix flute 201 is 1/4 ~ 1/5 of a cutter hub circumferential length, and the degree of depth is a cutter hub diameter about 1/3, and requires the helicla flute slyness bright and clean.

In the present embodiment, the groove width of double helix flute 201 has strengthened 1 ~ 2mm than same specification shallow hole drilling helicla flute width, can guarantee out bits;

The outside 101(that guide head is provided with two symmetries as shown in Figure 5), this outside 101 adopts indexable insert tip, throw away tip, the blade symmetry is installed in the guide head outside, double blade is symmetrical arranged, reduce the generation of working angles eccentric throw, improved the cutter rigidity, reduced generation of vibration, and twolip participates in cutting simultaneously, improves stock-removing efficiency;

Heat in metal cutting can in time be taken away in cold machining liquid hole 102 in also being provided with on the guide head in working angles, cool off cutter and workpiece rapidly, also in time washes away the short-and-medium bits of working angles in addition, guarantees tool life.

Large scale double helix flute and guide head have guaranteed in the working angles, and chip removal outward and appearance bits ability reduce the cutter hub friction automatically.

Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.

Claims

1. an indexable reamer is characterized in that, this reamer comprises cutter hub (2) and is arranged on guide head (1) on the cutter hub (2);

Cutter hub is provided with double helix flute (201);

Guide head is provided with the outside (101) of two symmetries.

2. indexable reamer as claimed in claim 1 is characterized in that, cold machining liquid hole (102) in also being provided with on the described guide head.

3. indexable reamer as claimed in claim 1 is characterized in that, described cutter hub (2) adopts the 40Cr steel.

4. indexable reamer as claimed in claim 1 is characterized in that, the diameter of described guide head (1) is than the big 1 ~ 1.2mm of cutter hub diameter.

5. indexable reamer as claimed in claim 1 is characterized in that, the width of described double helix flute (201) is 1/4 ~ 1/5 of a cutter hub circumferential length, and the degree of depth is 1/3 of a cutter hub diameter.

6. indexable reamer as claimed in claim 1 is characterized in that, described outside (101) adopts indexable insert tip, throw away tip, and the blade symmetry is installed in the guide head outside.