CN205733152U

CN205733152U - A kind of drill bit

Info

Publication number: CN205733152U
Application number: CN201620452742.2U
Authority: CN
Inventors: 刘小蓉
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-05-17
Filing date: 2016-05-17
Publication date: 2016-11-30
Anticipated expiration: 2026-05-17

Abstract

This utility model provides a kind of drill bit, belongs to machine tool technical field.It solve the technical problems such as existing bit bore efficiency is low.This drill bit includes drilling rod and cutter head, and cutter head is welded on the end of drilling rod, and cutter head has four cutting edges, and four cutting edges are circumferentially distributed along drilling rod, and each cutting edge is all arranged along the length direction of drilling rod；Four cutting edges are respectively provided with assembles, to drill rod axis, the arc blade surface extended and the relative cutting edge of two of which gathers and a little forms point of a knife, has spacing between two other relative cutting edge and point of a knife.Drill bit cutter head in this utility model is provided with four cutting edges, point of a knife is formed by the cutting edge that two of which is relative, there is between two other relative cutting edge and point of a knife certain spacing, point of a knife is after the drilling completing original position, being transitioned into four cutting edges at once to carry out chip, in the case of rod rotation speed is certain, stock-removing efficiency is greatly improved, and the intensity of cutter head is bigger, cutting edge is not easy to damage.

Description

A kind of drill bit

Technical field

This utility model belongs to machine tool technical field, relates to a kind of drill bit.

Background technology

Drill bit is a kind of common machining or the instrument of production operation, can at workpiece or Hole on construction object, be used on various electric drill, drilling machine or drilling machine, range Extensively, the kind of drill bit is the most varied simultaneously, and usual drill bit all includes a knife bar, Knife bar has a tip, and there is cutting blade at tip, knife bar also has chip area, makes Used time drill bit rotates around vertical shaft, moves axially simultaneously.Moment of torsion and axial force at drill bit The lower workpiece of effect or construction object are cut and portal, and chip is discharged from chip area.

China's patent documentation (notification number: CN203592176U；The day for announcing: 2014-05-14) In disclose a kind of novel holing drill bit, including drilling rod, cutting edge, drilling rod is provided with even Fitting, connector includes the skewed slot adaptive with cutting edge, and skewed slot is by connector Connector is also divided into the first protection portion, the second protection portion by the heart, and cutting edge includes two arcs Shape cutting edge, two arc milling swords engage also angulation and are less than 90 on cutting edge top The point of a knife of degree；Protection portion is the skewback that the thicker other end in one end is relatively thin, drilling rod and cutting edge Welding, drilling rod week side be provided with anti-dandruff screw thread.

Summary of the invention

The problems referred to above that this utility model exists for existing technology, it is provided that a kind of drill bit, Technical problem to be solved in the utility model is: how to improve boring when drill bit uses Efficiency.

The purpose of this utility model can be realized by following technical proposal:

A kind of drill bit, including drilling rod and cutter head, described cutter head is welded on the end of described drilling rod Portion, it is characterised in that described cutter head has four cutting edges, and four cutting edges are along drilling rod Circumferentially distributed, each cutting edge is all arranged along the length direction of drilling rod；Four cutting edges are equal Have and assemble, to drill rod axis, the arc blade surface extended and the relative cutting edge of two of which gathers Collection forms point of a knife to a bit, has spacing between two other relative cutting edge and point of a knife.

Its principle is as follows: normal drill bit of the prior art generally only two is just to setting Cutting edge, two such cutting edge formed point of a knife sharper, it is simple to pull out of hole time Efficient operation, but follow-up due to the limited amount of cutting edge, and also the rotating speed of drilling rod has Limit, the efficiency causing borehole cuttings is low；Drill bit in the technical program adds on this basis To improve, cutter head is provided with four cutting edges, and point of a knife is only by two relative cutting edges Composition, has certain spacing between two other relative cutting edge and point of a knife, between being somebody's turn to do Away from the least, point of a knife, after the drilling completing original position, is transitioned into four cutting edges at once Carrying out chip, in the case of rod rotation speed is certain, stock-removing efficiency promotes 2 times, and And the intensity of cutter head is bigger, cutting edge is not easy to damage.

In above-mentioned drill bit, described arc blade surface is by the outward-dipping setting of drilling rod periphery And form cutting edge.Arc blade surface tilts relative to the axis of drilling rod, four arc blade surfaces Incline direction has regularity and concordance, i.e. make drilling rod rotate time, the court of cutting edge To identical, it is achieved cutting operation.

In above-mentioned drill bit, two cutting edges forming point of a knife are first group of blade, separately Two cutting edges are second group of blade, second group of blade be positioned at point of a knife both sides and with point of a knife two Between the sidewall of side, there is arc groove.So prevent second group of blade from Workpiece boring being risen The interference of beginning position and impact, and it is easy to two cutting edges to four by arc groove The quick smooth and easy transition of cutting edge.

In above-mentioned drill bit, four described cutting edge uniform intervals are distributed in described drilling rod Upper and cutting edge protrudes from the outer peripheral face of described drilling rod.

In above-mentioned drill bit, the outer peripheral face of described drilling rod is further opened with the chip removal of spiral Groove, the drilling rod between adjacent two cutting edges all offers guiding gutter, each guiding gutter All length directions along drilling rod arrange and are connected with described chip area.

In above-mentioned drill bit, described chip area is single groove or double groove, described water conservancy diversion Groove is V-groove.

In above-mentioned drill bit, described chip area is double helicla flute, and described chip area prolongs Extending cutter head and drilling rod junction, the initial of described chip area rectifies described cutting edge, Two adjacent described guiding gutters are connected with one of them chip area, and two other is adjacent Described guiding gutter be connected with another one chip area.

Compared with prior art, the drill bit cutter head in this utility model is provided with four cuttings Sword, point of a knife is formed by the cutting edge that two of which is relative, two other relative cutting edge And having certain spacing between point of a knife, this spacing is the least, and point of a knife completes original position Drilling after, be transitioned into four cutting edges at once to carry out chip, certain at rod rotation speed In the case of, stock-removing efficiency is greatly improved, and the intensity of cutter head is bigger, and cutting edge is not It is easily damaged.

Accompanying drawing explanation

Fig. 1 is the perspective view of this drill bit.

Fig. 2 is the perspective view of drilling rod in this drill bit.

Fig. 3 is the perspective view of cutter head in this drill bit.

In figure, 1, drilling rod；11, chip area；12, guiding gutter；2, cutter head；21、 Cutting edge；21a, arc blade surface；21b, cutting edge；22, point of a knife；23, arc groove.

Detailed description of the invention

The following is specific embodiment of the utility model and combine accompanying drawing, to this utility model Technical scheme be further described, but this utility model is not limited to these embodiments.

Normal drill bit of the prior art generally only two just to the cutting edge arranged, this The point of a knife that two cutting edges of sample are formed is sharper, it is simple to the efficient operation when pulling out of hole, but It is follow-up due to the limited amount of cutting edge, and the rotating speed of drilling rod is limited, cause boring The efficiency of chip is low；Drill bit in the technical program is improved on this basis, such as figure Shown in 1 to Fig. 3, this drill bit includes drilling rod 1 and cutter head 2, and cutter head 2 is welded on drilling rod 1 End, cutter head 2 has four cutting edges 21, and four cutting edges 21 were along drilling rod 1 week To distribution, each cutting edge 21 is all arranged along the length direction of drilling rod 1；Four cutting edges 21 be respectively provided with to drilling rod 1 axis assemble extend arc blade surface 21a and two of which relative Cutting edge 21 gather and a little form point of a knife 22, two other relative cutting edge 21 And between point of a knife 22, there is spacing；Cutter head 2 is provided with four cutting edges 21, and point of a knife 22 are made up of two relative cutting edges 21, two other relative cutting edge 21 with Having certain spacing between point of a knife 22, this spacing is the least, and point of a knife 22 initiates completing After the drilling of position, it is transitioned into four cutting edges 21 at once to carry out chip, at drilling rod 1 In the case of rotating speed is certain, stock-removing efficiency promotes 2 times, and the intensity of cutter head 2 is bigger, Cutting edge 21 is not easy to damage.

As shown in figures 1 and 3, arc blade surface 21a is outward-dipping by drilling rod 1 periphery Arranging and formed cutting edge 21b, arc blade surface 21a tilts relative to the axis of drilling rod 1, The incline direction of four arc blade surfaces 21a has regularity and concordance, i.e. makes drilling rod 1 rotate time, cutting edge 21b towards identical, it is achieved cutting operation；Form point of a knife 22 Two cutting edges 21 be first group of blade, another two cutting edge 21 is second group of blade, Second group of blade point of a knife 22 both sides and and the sidewall of point of a knife 22 both sides between there is arc Connected in star 23, so prevents second group of blade to the interference of Workpiece boring original position and shadow Ring, and be easy to 21 to four cutting edges of two cutting edges 21 by arc groove 23 Quick smooth and easy transition.

In the present embodiment, four cutting edge 21 uniform intervals are distributed on drilling rod 1 and cutting edge On 21 outer peripheral faces protruding from drilling rod 1.

As depicted in figs. 1 and 2, the outer peripheral face of drilling rod 1 is further opened with the chip removal of spiral Groove 11, the drilling rod 1 between adjacent two cutting edges 21 all offers guiding gutter 12, Each guiding gutter 12 all arranges along the length direction of drilling rod 1 and is connected with chip area 11； Chip area 11 can be single groove, it is also possible to be double groove, and guiding gutter 12 is V-groove； In the present embodiment, chip area 11 is double helicla flute, chip area 11 extend to cutter head 2 with Drilling rod 1 junction, the initial of chip area 11 rectify cutting edge 21, and two adjacent Guiding gutter 12 is connected with one of them chip area 11, two other adjacent guiding gutter 12 are connected with another one chip area 11.

Specific embodiment described herein is only for example to this utility model spirit Explanation.This utility model person of ordinary skill in the field can be to described concrete Embodiment is made various amendment or supplements or use similar mode to substitute, but not Spirit of the present utility model can be deviateed or surmount model defined in appended claims Enclose.

Although the most more employing 1, drilling rod；11, chip area；12, guiding gutter； 2, cutter head；21, cutting edge；21a, arc blade surface；21b, cutting edge；22, point of a knife； 23, the term such as arc groove, but it is not precluded from using the probability of other term.Use These terms are only used to describe and explain essence of the present utility model more easily；? They are construed to any additional restriction is all to disagree with this utility model spirit 's.

Claims

1. a drill bit, including drilling rod (1) and cutter head (2), described cutter head (2) welds It is connected on the end of described drilling rod (1), it is characterised in that described cutter head (2) has four Individual cutting edge (21), four cutting edges (21) are circumferentially distributed along drilling rod (1), each Cutting edge (21) is all arranged along the length direction of drilling rod (1)；Four cutting edges (21) It is respectively provided with and assembles the arc blade surface (21a) and two of which extended to drilling rod (1) axis Relative cutting edge (21) gathers and a little forms point of a knife (22), and two other is relative Between cutting edge (21) and point of a knife (22), there is spacing.

Drill bit the most according to claim 1, it is characterised in that described arc blade surface (21a) by the outward-dipping setting of drilling rod (1) periphery and form cutting edge (21b).

Drill bit the most according to claim 1, it is characterised in that form point of a knife (22) Two cutting edges (21) be first group of blade, another two cutting edge (21) is second Group blade, second group of blade be positioned at point of a knife (22) both sides and with point of a knife (22) both sides There is between sidewall arc groove (23).

4. according to the drill bit described in claim 1 or 2 or 3, it is characterised in that four Described cutting edge (21) uniform intervals is distributed on described drilling rod (1) and cutting edge (21) Protrude from the outer peripheral face of described drilling rod (1).

5. according to the drill bit described in claim 1 or 2 or 3, it is characterised in that described It is further opened with the chip area (11) of spiral on the outer peripheral face of drilling rod (1), cuts for adjacent two Cut and all offer guiding gutter (12), each water conservancy diversion on the drilling rod (1) between sword (21) Groove (12) all along drilling rod (1) length direction arrange and with described chip area (11) phase Connection.

Drill bit the most according to claim 5, it is characterised in that described chip area (11) For single groove or double groove, described guiding gutter (12) is V-groove.

Drill bit the most according to claim 5, it is characterised in that described chip area (11) For double helicla flute, described chip area (11) extends to cutter head (2) and drilling rod (1) Junction, described chip area (11) initial rectifies described cutting edge (21), two Adjacent described guiding gutter (12) is connected, additionally with one of them chip area (11) Two adjacent described guiding gutters (12) are connected with another one chip area (11).