CN201320623Y

CN201320623Y - Inner-cooling tipped type drill bit

Info

Publication number: CN201320623Y
Application number: CNU2008202154023U
Authority: CN
Inventors: 程荣
Original assignee: Changzhou Precision Carbide Tool Co Ltd
Current assignee: Changzhou Precision Carbide Tool Co Ltd
Priority date: 2008-11-28
Filing date: 2008-11-28
Publication date: 2009-10-07
Anticipated expiration: 2018-11-28

Abstract

The utility model relates to an open inner-cooling type drill bit, in particular to an inner-cooling tipped type drill bit, which comprises a tool bit, a tool bar and a tool shank. An inner-cooling hole is formed between the tool bar and the tool shank; the tool shank is provided with a scrap discharge groove; the tool bar and the tool shank are cast into a whole body; and the tool bit is made of hard alloy and welded at the end part of the tool shank. The utility mode greatly saves the production cost.

Description

Interior cold welding sword formula drill bit

Technical field

The utility model relates to a kind of internal-cooling bit of drill of perforate, especially interior cold welding sword formula drill bit.

Background technology

Drill bit is to go out through hole or blind hole in order to drilling on solid material, and can be to the cutter of existing hole reaming.Drill bit commonly used mainly contains fluted drill, chit drill, centre drill, depth drill and cylindrical drill.Used common drill bit generally uses material to be carbide alloy and high-speed steel, and with the drill bit that Hardmetal materials is made, though durable in use, price is very high, and the outside diameter of producing can not surpass

Production use cost height, with the drill bit that high-speed steel is made, though low price, use cost is cheap relatively, because the low fracture easily of the drill bit rigidity of high speed steel material, so use cumbersomely, often change.

Goal of the invention

The utility model provides a kind of interior cold welding sword formula drill bit at the not enough shortcoming of the high high speed steel material rigidity of Hardmetal materials production use cost in the above-mentioned technology.

The realization the technical solution of the utility model is as follows:

Interior cold welding sword formula drill bit, it comprises cutter head, knife bar, handle of a knife, cold hole in having in knife bar and handle of a knife has chip area on the knife bar, the casting integrated moulding of described knife bar and handle of a knife, described cutter head is a carbide bit, this cutter head is welded on the knife bar end.

Described carbide bit is fixedly connected on the axial end of knife bar end by silver soldering.

Cold hole is cold hole in the Y type that supplies coolant flow in described.

Use above technology, interior cold welding sword formula drill bit, it comprises knife bar, handle of a knife and the interior cold hole in body and handle of a knife that high speed steel material is made, have two chip areas on the knife bar, the axial end of knife bar end is provided with the rectangle carbide bit, the carbide bit that makes the utility model use is fixedly connected on the knife bar of high-speed steel by silver soldering, makes it can reach the same effect of carbide drill, and production cost is saved greatly.

Description of drawings

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

Fig. 2 is that the A of Fig. 1 is to schematic diagram;

Among the figure: 1, cutter head, 2, knife bar, 3, handle of a knife, 4, interior cold hole, 5, chip area.

The specific embodiment

As shown in Figure 1 and Figure 2, interior cold welding sword formula drill bit, it comprises the rectangle cutter head 1 that Hardmetal materials is made, knife bar 2 that high-speed steel is made and handle of a knife 3, knife bar 2 and handle of a knife 3 casting integrated moulding and in have in cold hole 4, have two chip areas 5 on the knife bar 2, cutter head 1 utilizes silver soldering to be fixed on the axial end of knife bar 2 ends, cold hole 4 is the Y type at drill bit internal in described, and cold hole 4 flows into for cooling fluid and carry out cooling down operation when drill bit is worked in this.

The interior cold welding sword formula drill bit that utilizes this utility model to make, minimum outer diameter reaches

Its cutter head 1 has reached the equal effect of carbide drill for carbide alloy, and has surmounted carbide drill dimensionally greatly, and knife bar 2 and handle of a knife 3 are high speed steel material, meets at this drill bit under the prerequisite of instructions for use to have saved production cost greatly.

Claims

1, interior cold welding sword formula drill bit, it comprises cutter head, knife bar, handle of a knife, cold hole in having in knife bar and handle of a knife, has chip area on the knife bar, it is characterized in that: the casting integrated moulding of described knife bar and handle of a knife, described cutter head are carbide bit, and this cutter head is welded on the knife bar end.

2, interior cold welding sword formula drill bit according to claim 1, it is characterized in that: described carbide bit is fixedly connected on the axial end of knife bar end by silver soldering.

3, interior cold welding sword formula drill bit according to claim 1 is characterized in that: cold hole is cold hole in the Y type that supplies coolant flow in described.