CN203184719U - Composite drill - Google Patents

Abstract

The utility model relates to a machine tool machining cutting tool, in particular to a composite drill. The composite drill comprises a tool bit and a hilt. Multiple cutting edges are arranged at the front end of the tool bit. Chip removal grooves are formed between the cutting edges and in the tool bit. The tail end of the tool bit is fixedly connected with the hilt thorough a connecting part. By means of the structure, the composite drill is capable of drilling holes and machining chamfers, and therefore multiple types of machining can be realized through the same drill; machining time is saved, machining efficiency is improved, and the service life of a cutter head is prolonged.

Description

Compound brill

Technical field

The utility model relates to a kind of machine tooling cutter, particularly a kind of composite drill bit.

Background technology

Generally all need a plurality of steps in the process of processing work, each step adopts different drill bits to process each different place of workpiece.Just need to change different processing drill bits like this in the process of different step, such replacing operation has increased process time, has reduced working (machining) efficiency, and often more bit change or cutter cause damage to cutterhead easily in addition.

In addition, when some special deep hole of processing, different depth at deep hole need process different faces, if adopt the at first degree of depth that need process of each drill bit of a plurality of different drill bits processing, so not only increased work difficulty, reduce operating efficiency, sometimes will certainly accurately determine working depth on the other hand, made the machining accuracy of deep hole not reach requirement.

In sum, need a kind of combined bits of design, can process multiple different face by a drill bit.

Summary of the invention

The utility model technical issues that need to address provide the high composite drill bit of a kind of production efficiency.

For solving above-mentioned technical problem, composite drill bit of the present utility model comprises cutter head and handle of a knife, and described cutter head front end is provided with some cutting edges, has chip area on the cutter head between the described cutting edge, and described cutter head tail end is fixedlyed connected with handle of a knife by connecting portion.

Be provided with chamfered section between described connecting portion and the handle of a knife.

Described chip area extends to handle of a knife through chamfered section always.

Angle between the described cutter head cutting edge is α, and the scope of α is 118 ° ± 2 °.

After adopting said structure, composite drill bit of the present utility model both can be holed, again can chamfering, can realize multiple processing by a drill bit, and saved process time, improved working (machining) efficiency, prolonged the service life of cutterhead.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model cutter head drift angle.

Among the figure: 1 is cutter head, and 2 is handle of a knife, and 3 is connecting portion, and 4 is cutting edge, and 5 is chip area, and 6 is chamfered section

The specific embodiment

As shown in Figure 1, composite drill bit of the present utility model comprises cutter head 1 and handle of a knife 2, and described cutter head 1 front end is provided with some cutting edges 4, have chip area 5 on the cutter head between the described cutting edge, cutting edge 4 is when cutting like this, and by the chip removal of chip area 5, cutting edge 4 just can constantly cut forward.Described cutter head 1 tail end is fixedlyed connected with handle of a knife 2 by connecting portion 3.

Further, in order to process the chamfering inclined-plane at workpiece, between described connecting portion 3 and handle of a knife 2, be provided with chamfered section 6.So not only can hole by 4 pairs of workpiece of cutting edge of cutter head 1 front end, can process the chamfering inclined-plane at workpiece by chamfered section 6 simultaneously.

Further, in order to make the working depth of the compound brill of the utility model darker, described chip area 5 extends on the handle of a knife 2 through chamfered section 6 always.When working depth surpassed length from the cutting edge to the chamfered section, the compound brill of the present utility model more degree of depth of workpiece in the past crept into like this.

Angle between the described cutter head cutting edge is α, and the scope of α is 118 ° ± 2 °, and the angle that adopts the cutter head cutting edge like this is 120 °, and such cutting speed is fast, the smear metal better effects if.

Claims (4)

1. a compound brill comprises cutter head and handle of a knife, it is characterized in that: described cutter head front end is provided with some cutting edges, has chip area on the cutter head between the described cutting edge, and described cutter head tail end is fixedlyed connected with handle of a knife by connecting portion.

2. according to the described compound brill of claim 1, it is characterized in that: be provided with chamfered section between described connecting portion and the handle of a knife.

3. according to the described compound brill of claim 2, it is characterized in that: described chip area extends to handle of a knife through chamfered section always.

4. according to each described compound brill in the claim 1 to 3, it is characterized in that: the angle between the described cutter head cutting edge is α, and the scope of α is 118 ° ± 2 °.

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