CN207521770U - Drill bit structure - Google Patents

Abstract

The utility model provides a kind of drill bit structure, comprising：One handle segment and a blade section, the front end of blade section sets an apex point portion, apex point portion both sides are oblique respectively backward to form one first cutting knife faces and one second cutting knife faces, the peripheral surface of blade section forms at least one first chip removal flute, and make blade section center that there is a drill core, the radius in one section of drill core is defined as core thickness, first cutting knife faces include one first apex face and a first time knife face, second cutting knife faces include one second apex face and second of knife face, first cutting edge of wherein the first apex face is not parallel with the first connection side of the first apex face, so that the apex face width of the first apex face is more than core thickness.Such drill bit structure has the advantages that cutting power is strong and service life is long.

Description

Drill bit structure

Technical field

The utility model is about a kind of drill bit structure, particularly relates to that a kind of cutting force is strong and the brill of drilling life of bit length Header structure

Background technology

Develop with the development of science and technology, the conducting wire on printed circuit board is increasingly towards high density with high-precision line thinning. For the high competition environment in response to market for the high quality of printed circuit board, high demand and fast supply, industry for Precision, intensity and the feed rate of microbit (micro drill) that printed circuit board drilling processing technology uses, very To being hole wall quality, the requirement for waiting processing conditions is also higher and higher.Moreover, in practice, industry would generally to it is overlapped form it is more Piece printed circuit board carries out identical Drilling operation technique together, to promote processing efficiency and reduce manufacture cost, therefore made The length of the bit used is longer, it is also necessary to have enough intensity and chip removal ability.

Mainly one end comprising a handle segment and blade section connection handle segment, the front end of blade section are set microbit One knife face structure 10, as shown in Figure 1, it is quiet to be symmetrically disposed on a point of a knife it includes two apex faces 12,12 ' and two side faces 14,14 ' Point 16 is cut to be carried out chisel to the surface of machining object using knife face structure 10.The apex face 12,12 ' of such design is due to outside Cutting edge 121,121 ' length of cut it is short, cutting force is smaller, and because apex face area is small so that drilling life of bit compared with It is short.

Utility model content

To solve the above-mentioned problems, one of the utility model aim is to propose a kind of drill bit structure, have cutting force strong and The advantages of service life is long.

Drill bit structure according to one embodiment of the utility model includes：One handle segment；And one blade section be set to shank One end of section, the front end of blade section set a knife face structure, and knife face structure includes an apex point portion, has a cusp in apex point portion, One first cutting knife faces and one second cutting knife faces are formed by apex point portion both sides are oblique respectively backward, at least the first cutting knife faces First outer periphery extends back along the peripheral surface of blade section curls up to form at least one first spiral side edge and at least one first Chip removal flute, and make blade section center that there is a drill core, the radius in a section of drill core is defined as core thickness, the first bite bread Containing one first apex face and a first time knife face, the second cutting knife faces include one second apex face and second of knife face, and first The intersection of a respective vertex is in cusp in apex face, first time knife face, the second apex face and second of knife face, wherein, the first master Knife face has one first cutting edge, one first seamed edge, one first connection side and one first exterior rim, the first seamed edge and second of knife Face connects, and the first connection side is connect, and one end of the first seamed edge connect one end intersection on side in point with first with first time knife face One end of the first cutting edge of point is connect with the one end of the first seamed edge far from cusp, and the other end of the first cutting edge is then toward far from first Connect the direction extension on side so that the first cutting edge is not parallel with the first connection side, and the both ends of the first exterior rim are respectively with first Cutting edge and the first connection side connect, and the shortest distance between the two-end-point of the first exterior rim defines an apex face width, wherein main It is thick that knife face width is more than core.

In an embodiment, first time knife face has one first knife spine in, one second seamed edge, one second connection and one second Exterior rim, first time knife face second connection connected when being connect with the first of the first apex face, one end of the second exterior rim and One end of first exterior rim of the first apex face be connected and altogether structure one using cusp be the circular arc in the center of circle as the first cutting knife faces First outer periphery, the angle of circular arc is between 60 degree to 200 degree.

In an embodiment, the second apex face is in triangle, is connected outside side and a third comprising a third seamed edge, a third Rim, second knife face include one the 4th seamed edge, one the 4th connection in, second knife spine and one the 4th exterior rim, the second master The third seamed edge of knife face is connect with the second seamed edge of first time knife face, the third of the second apex face connection side and second knife face 4th connection side is connected, and the 4th seamed edge of second of knife face is connected with the first seamed edge of the first apex face；The of second of knife face Four exterior rims include be connected one first while and when one second, first while and arc-shaped or linear when second；Wherein second Second knife spine of knife face is parallel in linearly and with the 4th connection while；In another embodiment, the second knife of second of knife face Carry on the back side it is arc-shaped and smooth with the first cutting edge and without dog-ear in succession.

In an embodiment, the first cutting knife faces and the second cutting knife faces are correspondingly arranged in apex point portion both sides, the first operator Face and the second apex face correspond to, and first time knife face and second of knife face correspond to, and the second apex face includes a third seamed edge, one second Cutting edge, third connection side and a third exterior rim, third connection side are connect, and one end of third seamed edge with second of knife face One end intersection on side is connect with third in cusp, and one end of the second cutting edge is connect with the one end of third seamed edge far from cusp, The other end of second cutting edge is then toward the direction extension that side is connected far from third so that the second cutting edge does not connect side with third and puts down Row, the both ends of third exterior rim connect side with the second cutting edge and third and connect respectively, between the two-end-point of third exterior rim most Apex face width is defined in short distance.

Further, one second outer periphery of the second cutting knife faces extends back along the peripheral surface of blade section curls up to be formed One second spiral side edge and one second chip removal flute, and blade section center is made to form drill core.

Further, the first outer periphery of part forms one first side gap ditch along the first spiral side edge, and the first side gap ditch is adjacent Nearly first knife spine side, the second outer periphery of part forms one second side gap ditch along the second spiral side edge, and the second side gap ditch is adjacent The nearly second knife spine side.

In an embodiment, the region of first apex face is gradually widened from the cusp toward the first outer rim edge direction.

Compared with prior art, it is as follows the advantages of the utility model：

The outside width of apex face in the knife face structure of the utility model is more than core thickness, and the cutting edge of apex face is longer, Cutting force is larger, and has larger apex face area because having, therefore have the advantages that service life is long.

Description of the drawings

The following drawings is only intended in doing schematic illustration and explanation to the utility model, does not limit the model of the utility model It encloses.Wherein：

Fig. 1 show a kind of knife face schematic diagram of drill bit of tradition.

Fig. 2 show the schematic diagram of one embodiment drill bit structure of the utility model.

Fig. 3 show the schematic diagram of one first embodiment knife face structure of the utility model.

Fig. 4 show the schematic diagram of one second embodiment knife face structure of the utility model.

Fig. 5 show the schematic diagram of one 3rd embodiment knife face structure of the utility model.

Drawing reference numeral explanation：

10 knife face structures

12nd, 12 ' apex face

121st, 121 ' cutting edge

14th, 14 ' side face

16 point of a knife dead points

20 drill bits

22 handle segments

24 blade sections

26th, 26 ' knife face structure

28 apex point portions

O cusps

32nd, 32 ', 52 first cutting knife faces

321st, 521 first outer periphery

34th, 34 ', 54 second cutting knife faces

541 second outer peripheries

36th, 36 ', 56 first chip removal flute

38 drill cores

T cores are thick

40th, 40 ', 60 first apex face

401st, 401 ', 601 first cutting edge

402nd, 402 ', 602 first seamed edge

403rd, 403 ', 603 first connection side

404th, 404 ', 604 first exterior rim

42nd, 42 ', 62 first time knife face

421st, 621 first knife spine side

422 second seamed edges

423 second connection sides

424 second exterior rims

44th, 44 ', 64 second apex face

641 second cutting edges

442nd, 642 third seamed edge

443rd, 643 thirds connection side

444th, 644 third exterior rim

46th, 46 ', 66 second of knife face

461st, 461 ', 661 second knife spine side

462 the 4th seamed edges

463rd, 463 ' the 4th connection side

464th, 464 ' the 4th exterior rim

465th, 465 ' first side

466th, 466 ' second side

W, W ', W1, W2 apex face width

θ angles

58 second chip removal flutes

68 first side gap ditches

70 second side gap ditches

Specific embodiment

Below by way of the appended attached drawing elaborate of specific embodiment cooperation, when the mesh for being easier to understand the utility model , technology contents, feature and its it is reached the effect of.

Detailed description are as follows for it, and it is non-limiting the utility model that an explanation is only done in the preferred embodiment.

The schematic diagram that Fig. 2 show one embodiment drill bit structure of the utility model is please referred to, as shown in the figure, drill bit 20 includes One handle segment 22 and a blade section 24, blade section 24 are set to one end of handle segment 22, and the front end of blade section 24 sets a knife face Structure 26, knife face structure 26 include an apex point portion 28.Fig. 3 show the signal of one first embodiment knife face structure of the utility model Figure, as shown in figure 3, there is a cusp o, as the apex point dead point of drill bit 20, by the both sides point in apex point portion 28 in apex point portion 28 Not toward the oblique row in 22 direction of handle segment into having one first cutting knife faces 32 and one second cutting knife faces 34, in first embodiment, The structure of first cutting knife faces 32 and the second cutting knife faces 34 is different, wherein the of outer rim positioned at the first cutting knife faces 32 One outer periphery 321 is curled up along the peripheral surface of blade section 24 toward the extension of 22 direction of handle segment, to form one first spiral side edge (figure In do not show) and one first chip removal flute 36, and cause the center of blade section 24 that there is a drill core 38, by the half of a section of drill core 38 Diameter is defined as a core thickness T.

Continue above description, as shown in figure 3, the first cutting knife faces 32 include one first apex face 40 and a first time knife face 42, the second cutting knife faces 34 include one second apex face 44 and second of knife face 46, the first apex face 40, first time knife face 42nd, in the second apex face 44 and second of knife face 46 intersection of a respective vertex in cusp o.First apex face 40 has one first Cutting edge 401, one first seamed edge 402, one first connection 403 and 1 first exterior rim 404 of side, one end of the first seamed edge 402 with One end intersection on the first connection side 403 in cusp o, first time knife face 42 have one first knife spine side 421, one second seamed edge 422, One second connection 423 and 1 second exterior rim 424 of side, one end of the second seamed edge 422 with second connect one end intersection on side 423 in Cusp o, and the first connection of the first apex face 40 423 is connected when 403 connect with the second of first time knife face 42, wherein first One end of first cutting edge 401 of apex face 40 is connect with first one end of seamed edge 402 far from cusp o, the first cutting edge 401 The other end is then toward the direction extension far from the first connection side 403 so that and the first cutting edge 401 is not parallel with the first connection side 403, The both ends of first exterior rim 404 connect side 403 with the first cutting edge 401 and first respectively and connect, and the two of the first exterior rim 404 The shortest distance between endpoint defines an apex face width W, and wherein apex face width W is more than core thickness T so that the first apex face 40 Region is gradually widened from cusp o toward 404 direction of the first exterior rim.

Please continue to refer to shown in Fig. 3, the of one end of the second exterior rim 424 of first time knife face 42 and the first apex face 40 One end of one exterior rim 404 is connected, and structure one is using cusp o as the circular arc in the center of circle altogether, this circular arc is that is, above-mentioned first cuts First outer periphery 321 in sharpener face 32, in first embodiment, the angle theta of circular arc is 120 degree, but not limited to this, in other realities It applies in example, the angle theta of circular arc is between 60 degree to 200 degree.

Continue above description, in first embodiment, the second apex face 44 slightly in triangle, comprising a third seamed edge 442, One third connects 443 and one third exterior rim 444 of side, second knife face 46 include one second knife spine side 461, the 4th seamed edge 462, One the 4th connection 463 and 1 the 4th exterior rim 464 of side.Wherein the third seamed edge 442 of the second apex face 44 and first time knife face 42 The second seamed edge 422 connect, the third of the second apex face 44 connects 463 phases when 443 connect with the 4th of second of knife face 46 Even, the 4th seamed edge 462 of second of knife face 46 is connected with first seamed edge 402 of the first apex face 40.Again in first embodiment In, as shown in the figure, the second knife spine side 461 is arc-shaped, and it is smooth with the first cutting edge 401 and without dog-ear in succession, and outside the 4th Rim 464 include be connected one first at 465 and one second 466, first 466 can arc-shaped or straight line at 465 and second Shape, and second connect in 466 one end with during the second knife spine 461 one end.

Fig. 4 show the schematic diagram of one second embodiment knife face structure of the utility model, is identical with the first embodiment, knife First cutting knife faces 32 ' of face structure 26 ' include one first apex face 40 ' and a first time knife face 42 ', the second cutting knife faces 34 ' include one second apex face 44 ' and second of knife face 46 ', and the first apex face 40 ', first time knife face 42 ', second are operated The intersection of a respective vertex is in cusp o in face 44 ' and second of knife face 46 ', wherein the first cutting edge of the first apex face 40 ' 401 ' one end connect with the one end of the first seamed edge 402 ' far from cusp o, and the other end of the first cutting edge 401 ' is then toward separate the The direction extension on one connection side 403 ' so that the first cutting edge 401 ' is not parallel with the first connection side 403 ', the first exterior rim 404 ' both ends connect the connection of side 403 ' with the first cutting edge 401 ' and first respectively, and between the two-end-point of the first exterior rim 404 ' The shortest distance define an apex face width W ', wherein apex face W ' width is more than core thickness T so that the area of the first apex face 40 ' Domain is gradually widened from cusp o toward 404 ' direction of the first exterior rim.

Continue above description, is different from the first embodiment ground, in a second embodiment, the second knife of second of knife face 46 ' The back of the body while 461 ' it is linearly and during with the 4th connection it is 463 ' parallel, and the 4th exterior rim 464 ' includes one first connected side 465 ' And one second side 466 ', to connect the second knife spine 463 ' one end far from cusp o when 461 ' one end and the 4th connect.

In the knife face structure described in above-mentioned first embodiment and second embodiment, the first cutting knife faces 32 (or 32 ') with Second cutting knife faces 34 (or 34 ') are only to have the first single cutting edge 401 (or 401 ') and list without symmetrical relationship The single cutting bit design of one the first chip removal flute 36 (or 36 '), it is such to make the first cutting edge 401 (or 401 ') oblique without with the For the parallel design of one connection side 404 (or 404 ') is compared to traditional cutting edge 121, the first cutting edge 401 (or 401 ') Length of cut it is longer, therefore cutting force is larger.Furthermore in the utility model, since apex face width W (or W ') is more than core Thick T so that the region of the first apex face 40 (or 40 ') is gradually widened from cusp o toward the first outer rim edge direction 404 (or 404 '), Therefore apex face area is larger so that the service life of drill bit is longer.

In the utility model, apex face width is more than the design of core thickness in addition to being applied to above-mentioned first embodiment and second Except in single cutting bit structure described in embodiment, it is equally applicable in the drill lip structure of tool twolip and double ditches.Fig. 5 show this The knife face structure diagram of one 3rd embodiment of utility model, as shown in figure 5, the first cutting knife faces 52 and the second cutting knife faces 54 28 both sides of apex point portion are correspondingly arranged in, the first apex face 60 and the second apex face 64 correspond to, and first time knife face 62 and second Knife face 66 corresponds to, a respective vertex in the first apex face 60, first time knife face 62, the second apex face 64 and second of knife face 66 Intersection is in cusp o.Again positioned at the first outer periphery 521 of 52 outer rim of the first cutting knife faces with being located at 54 outer rim of the second cutting knife faces Second outer periphery 541 is accordingly respectively along the peripheral surface of blade section 24 (being shown in Fig. 2) toward handle segment 224 (being shown in Fig. 2) direction Extension is curled up, to form one first spiral side edge (Fig. 5 does not show), one first chip removal flute 56, one second spiral side edge (Fig. 5 does not show) And second chip removal flute 58, and cause the center of blade section 24 (being shown in Fig. 2) that there is a drill core 38, by the half of a section of drill core 38 Diameter is defined as a core thickness T (web thickness).

Please continue to refer to shown in Fig. 5, there is the first apex face 60 first cutting edge 601, the first seamed edge 602, first to connect 603 and first exterior rim 604 of side, one end of the first seamed edge 602 connect one end intersection on side 603 in cusp o, the second master with first Knife face 64 includes one second cutting edge 641, a third seamed edge 642, third connection 643 and one third exterior rim 644 of side, third Connection side 643 is connect, and one end of third seamed edge 642 connect one end intersection on side 643 with third in point with second of knife face 66 Point o.Again the first apex face 60 the first cutting edge 601 and the second apex face 64 the second cutting edge 641 respectively with apex point portion 28 Both ends connection, the other end of the first cutting edge 601 is toward the direction extension far from the first connection side 603 so that the first cutting edge 601 is parallel with the first connection side 603, and the other end of the second cutting edge 641 extends toward the direction that side 643 is connected far from third, So that the second cutting edge 641 is not parallel with third connection side 643, so that the first exterior rim 604 and third exterior rim 644 The shortest distance between two-end-point defines apex face width W1, W2 and is more than core thickness T, that is, 60/ second apex face of the first apex face 64 region is gradually widened from cusp o toward 604/ third exterior rim of the first exterior rim, 644 direction.

The first outer periphery of which part 521 forms one first side gap ditch 68, and the first side along the first spiral side edge of part Gap ditch 68 forms one second side gap ditch adjacent to the first knife spine side 621, the second outer periphery of part 541 along the second spiral side edge of part 70, and second when gap ditch 70 is adjacent to the second knife spine 661.

In the knife face structure of 3rd embodiment, make 601/ second cutting edge 641 of the first cutting edge oblique without with first Connection is for when 603/ third connects, 643 parallel designs are compared to traditional cutting edge 121, the first cutting edge 601 and the The length of cut of two cutting edges 641 is longer, therefore cutting force is larger.Furthermore in the utility model, due to the first apex face The knife face width W1/W2 of 60/ second apex face 64 be more than core thickness T so that the region of 60/ second apex face 64 of the first apex face by Cusp o gradually widens, therefore apex face area is larger toward 603/ third exterior rim of the first exterior rim, 643 direction so that drill bit Service life is longer.

According to above-mentioned, either single cutting bit or two-point bit, apex face in the knife face structure of the utility model it is outer Side width is more than core thickness, and the cutting edge of apex face is longer, and cutting force is larger, and has larger apex face area because having, therefore Have the advantages that service life is long.

Embodiment described above is only the technological thought and feature to illustrate the utility model, and the purpose is to make this field Technical staff can understand the content of the utility model and implement according to this, when cannot with its limit the utility model protection model It encloses, i.e., the equivalent change made generally according to the revealed spirit of the utility model or modification should be covered in the utility model In protection domain.

Claims (10)

1. a kind of drill bit structure, which is characterized in that the drill bit structure includes：

One handle segment；And

One blade section is set to one end of the handle segment, and the front end of the blade section sets a knife face structure, which includes One apex point portion has a cusp in the apex point portion, by the apex point portion both sides respectively backward it is oblique formed one first cutting knife faces and One first outer periphery of one second cutting knife faces, at least first cutting knife faces extends back rotation along the peripheral surface of the blade section Around to form at least one first spiral side edge and at least one first chip removal flute, and make the blade section center that there is a drill core, the brill The radius in one section of core is defined as core thickness, which includes one first apex face and a first time knife face, should Second cutting knife faces include one second apex face and second of knife face, first apex face, the first time knife face, second master The intersection of a respective vertex is in the cusp in knife face and second of knife face, wherein, which has one first cutting In, one first seamed edge, one first connection and one first exterior rim, second of knife face of first seamed edge and this are connect, this first Connection side is connect with the first time knife face, and one end of first seamed edge first connect one end intersection on side in the cusp with this, One end of first cutting edge is connect with the one end of first seamed edge far from the cusp, and the other end of first cutting edge is then toward remote Direction extension from the first connection side so that first cutting edge is not parallel with the first connection side, first exterior rim Both ends respectively with first cutting edge and this first connect side connection, the shortest distance between the two-end-point of first exterior rim defines It is thick that one apex face width, wherein the apex face width are more than the core.

2. drill bit structure as described in claim 1, which is characterized in that the first time knife face includes one first knife spine side, one the Two seamed edges, one second connection side and one second exterior rim, the second connection side of the first time knife face and first apex face First connection side connection, one end of second exterior rim is connected and is total to one end of first exterior rim of first apex face Structure one is the circular arc in the center of circle as first outer periphery of first cutting knife faces using the cusp, and the angle of the circular arc is between 60 degree To between 200 degree.

3. drill bit structure as claimed in claim 2, which is characterized in that second apex face is in triangle, includes a third rib In the connection of a, third and a third exterior rim, second of knife face include one the 4th seamed edge, one the 4th connection side, one second Knife spine side and one the 4th exterior rim, the third seamed edge of second apex face are connect with second seamed edge of the first time knife face, The third connection of second apex face is connected when being connect with the 4th of second of knife face the, second of knife face this Four seamed edges are connected with first seamed edge of first apex face.

4. drill bit structure as claimed in claim 3, which is characterized in that the 4th exterior rim of second of knife face, which includes, to be connected One first while and when one second, this first while and this second while arc-shaped or linear.

5. drill bit structure as claimed in claim 3, which is characterized in that the second knife spine side of second of knife face is linearly It is and parallel with the 4th connection side.

6. drill bit structure as claimed in claim 3, which is characterized in that the second knife spine side of second of knife face is arc-shaped, It is and smooth in succession with first cutting edge.

7. drill bit structure as claimed in claim 2, which is characterized in that first cutting knife faces and second cutting knife faces correspond to The apex point portion both sides are set to, first apex face and second apex face correspond to, the first time knife face and second of knife face Corresponding, which includes a third seamed edge, one second cutting edge, third connection side and a third exterior rim, this Three connection second of knife face in side and this are connect, and one end of the third seamed edge connect one end intersection on side with the third in the point Point, one end of second cutting edge are connect with the one end of the third seamed edge far from the cusp, and the other end of second cutting edge is then Toward the direction extension that side is connected far from the third so that second cutting edge is not parallel with third connection side, the third outer rim While both ends connect respectively with second cutting edge and the third while connect, the shortest distance between the two-end-point of the third exterior rim Define the apex face width.

8. drill bit structure as claimed in claim 7, which is characterized in that one second outer periphery of second cutting knife faces is along this The peripheral surface of blade section, which extends back, to be curled up to form one second spiral side edge and one second chip removal flute, and makes the blade section central Form the drill core.

9. drill bit structure as claimed in claim 8, which is characterized in that part first outer periphery is along first spiral side edge Form one first side gap ditch, and this is first in first knife spine of gap ditch adjacent to the first time knife face, part second periphery Edge second spiral side edge and forms one second side gap ditch, and the second side gap ditch is adjacent to one second knife of second of knife face Carry on the back side.

10. drill bit structure as described in claim 1, which is characterized in that the region of first apex face from the cusp toward this One outer rim edge direction is gradually widened.