CN208450674U

CN208450674U - A kind of carbide drill with point of a knife protection structure

Info

Publication number: CN208450674U
Application number: CN201820176865.7U
Authority: CN
Inventors: 单延松
Original assignee: Suzhou Heng Bit Precision Tool Co Ltd
Current assignee: Suzhou Heng Bit Precision Tool Co Ltd
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2019-02-01
Anticipated expiration: 2028-02-01

Abstract

It is excessively sharp to solve the point of a knife 231 of the above carbide drill, caused by the aperture of drilling be also easy to produce burr, and drill bit reduced service life the problem of, the utility model proposes a kind of carbide drills with point of a knife protection structure, its sharp angle for directly forming 231 two planes of point of a knife, change into the transition of the arc-shaped angle R, so that two planes of point of a knife 231 no longer directly form sharp angle, but there is a round and smooth transitional region, the pressure dispersion received on point of a knife 231 is allowed in this way, so that pressure reduces, the service life of drill bit can be extended, in addition, since point of a knife 231 becomes mellow and full, in this way but also aperture is not easy to be scratched and generate burr when drilling.

Description

A kind of carbide drill with point of a knife protection structure

Technical field

The utility model relates to arrive cutter manufacture technical field, it is specifically related to a kind of with the hard of point of a knife protection structure Matter alloy bit.

Background technique

Currently, common carbide drill is most widely used a kind of cutter in process tool, high in machining efficiency, Processing quality is good.As shown in Figure 1, being the essential structure of carbide drill comprising: shank 1 and working portion 2, work department Dividing 2 includes chip space 21, side edge 22 and apex point 23, and wherein chip space 21 and side edge 22 are distributed in the direction of the central axis of drill bit, Apex point 23 is connect with chip space 21 and side edge 22, and point of a knife 231 is wherein contained on apex point 23, and point of a knife 231 is usually all relatively more sharp.Such as It is the main view of the point of a knife of general carbide drill, it can be seen that point of a knife is direct by two planes db and bc shown in Fig. 2 The intersection angle sharp into a comparison.And in the case that point of a knife 231 compares sharply, it is easy to the aperture of drilling be caused to generate Burr, and generating burr then is not the case where wishing to when drilling.Simultaneously as point of a knife 231 is excessively sharp, so that knife Stress pressure at point 231 is bigger, so that point of a knife 231 is easier to damage, so that the reduced service life of drill bit.

Utility model content

Be excessively sharp to solve the point of a knife 231 of the above carbide drill, caused by the aperture of drilling be also easy to produce hair The problem of reduced service life of thorn and drill bit, the utility model proposes a kind of hard alloy with point of a knife protection structure Drill bit, the sharp angle that 231 two planes of point of a knife are directly formed, changes into the transition of the arc-shaped angle R, so that point of a knife 231 Two planes no longer directly form sharp angle, but have a round and smooth transitional region, allowed on point of a knife 231 in this way Receive pressure dispersion so that pressure reduce, the service life of drill bit can be extended, in addition, since point of a knife 231 becomes round Profit, in this way but also aperture is not easy to be scratched and generate burr when drilling.

A kind of carbide drill with point of a knife protection structure comprising: shank 1 and working portion 2, working portion 2 Including chip space 21, side edge 22 and apex point 23, wherein chip space 21 and side edge 22 are distributed in the direction of the central axis of drill bit, apex point 23 connect with chip space 21 and side edge 22, point of a knife 231 are wherein contained on apex point 23, it is characterised in that: 231 two planes of point of a knife Pass through the arc-shaped angle R transition face ab connection between ad and bc.

Further, the arc-shaped angle R transition face ab and face bc is tangent, the arc-shaped angle R transition face ab and face bc transitions smooth, There is no high point or pits.

Further, the arc-shaped angle R transition face ab is symmetrical structure, and symmetry guarantees within 0.01mm.

Further, the radius at the angle R of the arc-shaped angle R transition face ab is 0.1-2.0mm.

Further, the carbide drill with point of a knife protection structure is fluted drill.

Further, can contain on each point of a knife of the carbide drill with point of a knife protection structure Point of a knife protects structure.

Further, the quantity of the point of a knife of the carbide drill with point of a knife protection structure is 2~6.

Further, there is AP coating on the surface of the carbide drill with point of a knife protection structure.

Using the carbide drill as described above by the arc-shaped angle R transition face ab connection, so that on point of a knife 231 The pressure dispersion received can extend the service life of drill bit so that pressure reduces, in addition, since point of a knife 231 becomes mellow and full, In this way but also aperture is not easy to be scratched and generate burr when drilling.

Detailed description of the invention:

Specific embodiment is further described with reference to the accompanying drawing, in which:

Fig. 1 is the basic structure schematic diagram of carbide drill.

Fig. 2 is the enlarged diagram of the tool bit part of traditional carbide drill.

Fig. 3 is the enlarged diagram of the tool bit part of the carbide cutter tool that structure is protected with point of a knife of the utility model.

Fig. 4 is the left view that the carbide cutter tool of case 1 is embodied.

Fig. 5 is the enlarged diagram of the left view of point of a knife.

Primary structure number explanation:

The following detailed description will be further explained with reference to the above drawings the utility model.

Specific embodiment

Case 1 is embodied:

As shown in Figure 1, being the essential structure of carbide drill, as shown in figure 3, for the carbide drill after improvement The main view of point of a knife.A kind of carbide drill with point of a knife protection structure comprising: shank 1 and working portion 2, work Part 2 includes chip space 21, side edge 22 and apex point 23, and wherein chip space 21 and side edge 22 are distributed in the side of the central axis of drill bit To apex point 23 is connect with chip space 21 and side edge 22, point of a knife 231 is wherein contained on apex point 23, it is characterised in that: 231 liang of point of a knife Pass through the arc-shaped angle R transition face ab connection between a plane ad and bc.The arc-shaped angle R transition face ab and face bc is tangent, arc-shaped High point or pit is not present in the angle R transition face ab and face bc transitions smooth.The arc-shaped angle R transition face ab is symmetrical structure, symmetrical Degree guarantees within 0.01mm.The radius at the angle R of the arc-shaped angle R transition face ab is 0.1-2.0mm.Described has point of a knife protection The carbide drill of structure is fluted drill.On each point of a knife of the carbide drill with point of a knife protection structure Structure can be protected containing point of a knife, and point of a knife quantity is 2.

As shown in figure 4, the left view of the carbide cutter tool for specific implementation case 1, Fig. 5 is the amplification of the left view of point of a knife Schematic diagram, it can be seen that de is knife line behind the angle R, and ef is lineback, and the angle of knife line de and lineback ef are behind the angle R of point of a knife 231 90°±1°。

Using the carbide drill as described above by the arc-shaped angle R transition face ab connection, so that on point of a knife 231 The pressure dispersion received can extend the service life of drill bit so that pressure reduces, in addition, since point of a knife 231 becomes mellow and full, In this way but also aperture is not easy to be scratched and generate burr when drilling, the finish of vent surface is improved.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims

1. a kind of carbide drill with point of a knife protection structure comprising: shank (1) and working portion (2), working portion It (2) include chip space (21), side edge (22) and apex point (23), wherein chip space (21) and side edge (22) are distributed in the center of drill bit The direction of axis, apex point (23) are connect with chip space (21) and side edge (22), wherein contain point of a knife (231) on apex point (23), special Sign is: passing through the arc-shaped angle R transition face ab connection between point of a knife (231) two planes ad and bc.

2. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: the arc-shaped angle R mistake It crosses face ab and face bc is tangent, high point or pit is not present in the arc-shaped angle R transition face ab and face bc transitions smooth.

3. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: the arc-shaped angle R mistake Crossing face ab is symmetrical structure, and symmetry guarantees within 0.01mm.

4. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: the arc-shaped angle R mistake The radius for crossing the angle R of face ab is 0.1-2.0mm.

5. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: described has knife The carbide drill of point protection structure is fluted drill.

6. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: described has knife On each point of a knife of the carbide drill of point protection structure structure can be protected containing point of a knife.

7. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: described has knife The quantity of the point of a knife of the carbide drill of point protection structure is 2~6.

8. the carbide drill as described in claim 1 with point of a knife protection structure, it is characterised in that: described has knife There is AP coating on the surface of the carbide drill of point protection structure.