CN201338119Y

CN201338119Y - Drill bit with replaceable blade

Info

Publication number: CN201338119Y
Application number: CNU200820182046XU
Authority: CN
Inventors: 蒋大双
Original assignee: ZHENJIANG NEW DIRSTRICT HENGFENG TOOLS CO Ltd
Current assignee: ZHENJIANG NEW DIRSTRICT HENGFENG TOOLS CO Ltd
Priority date: 2008-12-08
Filing date: 2008-12-08
Publication date: 2009-11-04
Anticipated expiration: 2018-12-08

Abstract

The utility model provides a drill bit with a replaceable blade, which comprises a tool bar and a blade, and the blade is connected with the tool bar detachably. The blade comprises a bayonet and location holes, and the bayonet is used to connect the tool bar and the blade in a clamping way. The bayonet is a square or round groove. The location holes are symmetrically arranged at both sides of the center of the blade. Because the blade is replaceable, material and costs are saved on the one hand, the tool bar can be used repeatedly, and meanwhile, the usable range of the drill bit can also be extended by replacing different blades.

Description

The drill bit of changeable blade

Technical field

The utility model relates to a kind of drill bit, or rather, relates to a kind of drill bit of changeable blade.

Background technology

The geometry of present fluted drill fixes substantially in the scope of national standard, and drill bit knife bar and drill tip be one, in practical operation, in case blade is damaged, then needs to change whole drill bit again, causes serious waste of material.And present spiral bit can only be at a kind of bore operation of size, and the scope of application is restricted.

Summary of the invention

At the shortcoming of existing drill bit, the purpose of this utility model provides a kind of drill bit of changeable blade, in actual job, if the damage of blade takes place, then only needs the replacing blade can and needn't change whole drill bit.In addition, can also match according to different bore sizes different drill tips is installed, can enlarge the scope of application of drill bit.

The drill bit of changeable blade of the present utility model comprises knife bar and blade, and this blade is connected with knife bar removably.This blade comprises bayonet socket and locating hole, and bayonet socket is used for clamping knife bar and blade.Bayonet socket is square groove or circular trough.Locating hole is distributed in the both sides at the center of described blade symmetrically.

Because blade can change, saved material and cost on the one hand, make knife bar to use repeatedly, simultaneously by changing the scope of application that different blades can also enlarge drill bit,

Description of drawings

Fig. 1 is the schematic diagram of the drill bit of changeable blade of the present utility model;

Fig. 2 is the blade structure schematic diagram of the drill bit of changeable blade among Fig. 1;

Fig. 3 is the cutting edge structure schematic diagram of the drill bit of changeable blade among Fig. 1.

The specific embodiment

As shown in Figure 1, drill bit 1 comprises knife bar 100 and blade 200, and blade 200 is connected with knife bar 100 removably.Knife bar 100 adopts the high-quality steel, and the more common drill bit of its chip pocket wants big, and more a step is guaranteed stability of cutting and the precision that improves processing like this.Blade 200 adopts the high-quality steel to process, such as M2AL, M35, M42 or powder high-speed steel and whole alloy thereof.

As shown in Figures 2 and 3, blade 200 comprises bayonet socket 210, locating hole 202, cutter groove 203 and cutting edge 204.Bayonet socket 210 is used for clamping blade 200 and knife bar 100.In the present embodiment, this bayonet socket 210 is the square bayonet socket.Certainly, the shape of bayonet socket 210 can also be circular or other arbitrary shapes, as long as can play the effect of clamping.On knife bar 100, be provided with the engaging piece corresponding with bayonet socket 210.Such as, when bayonet socket was square groove, engaging piece then was a square protrusion.Locating hole 202 is the screwed hole of a pair of circle, is symmetrically distributed in the both sides at the center of blade.Fixed blade that can be more firm like this.Certainly, the number of locating hole 202 is not fixed, and can be other even numbers yet, is distributed in the both sides of blade center symmetrically.Cutting edge 204 is an arc, can strengthen the precision of drill bit.

When in practical operation, blade 200 is damaged, and the user only need back out the dog screw on the locating hole 202, takes off the blade of infringement, again the bayonet socket 210 of new blade is installed in the corresponding engagement place of knife bar 100 then as required, the trip bolt of in locating hole 202, screwing at last.Because blade can be changed, knife bar 100 can repeatedly utilize like this, and the scope of processing has also enlarged.Such as, the range of work of the knife bar that diameter is 30 millimeters can be 30 millimeters to 35 millimeters.

Claims

1. the drill bit of changeable blade comprises knife bar and blade, it is characterized in that, described blade is connected with described knife bar removably.

2. the drill bit of changeable blade according to claim 1 is characterized in that, described blade comprises bayonet socket and locating hole, and described bayonet socket is used for described knife bar of clamping and blade.

3. the drill bit of changeable blade according to claim 2 is characterized in that, described bayonet socket is square groove or circular trough.

4. the drill bit of changeable blade according to claim 2 is characterized in that, described locating hole is distributed in the both sides at the center of described blade symmetrically.