CN218775744U

CN218775744U - Improved structure of three-edge drill point

Info

Publication number: CN218775744U
Application number: CN202222533547.0U
Authority: CN
Inventors: 钟任超; 陈清文
Original assignee: Shanghai Topoint Precision Technology Co
Current assignee: Shanghai Topoint Precision Technology Co
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-03-31
Anticipated expiration: 2032-09-23

Abstract

The utility model provides an improvement structure of three sword formula drill pins, including a drill pin, this drill pin has a stalk portion, and there is the cutting part on one side of this stalk portion, and be equipped with the slot part between this cutting part and stalk portion, and the cutting part opposite side of relative stalk portion is equipped with respectively and is the three cutting faces that cyclic annular range set up, and the tangent plane that this each cutting face was the setting of same grinding angle, so that each cutting face is connected in adjacent another cutting face and is formed with the crest line respectively, and the slot part is connected respectively in each cutting face adjacent another cutting face side and is linked up drill pin outer fringe surface punishment and do not concavely be equipped with towards the stalk portion direction and be the chip groove that the heliciform extends, and connect respectively each chip groove surface punishment at each crest line and do not be equipped with the recess that is "V" for the same grinding angle type, borrow this and promote better incomplete bits discharge effect, and then avoid the drill pin to take place to burst, cracked possibility, with the mesh of the pore wall quality of the hole when promoting drilling.

Description

Improved structure of three-edge drill point

Technical Field

The utility model relates to an improvement structure of three sword formula drill pins especially indicates that three cutting faces of the cutting part of drill pin connect adjacent another cutting face and are formed with the crest line respectively to connect respectively each chip groove surface punishment respectively at each crest line and be equipped with the recess, borrow this and promote incomplete bits discharge effect and prevent to form the jam, and then avoid the drill pin to take place to burst apart, cracked possibility, with the purpose that promotes the pore wall quality of the hole when cutting.

Background

In the current trend of light, thin, short and small electronic products, the volume requirements of various electronic products become smaller, so that the manufacturing and processing of various electronic components inside the electronic products become more and more precise, and the volume of the printed circuit board capable of being assembled and positioned by the electronic components in the electronic products must be reduced, therefore, in the manufacturing process of the printed circuit board, a mechanical drilling process for processing a circuit substrate is mostly performed by using a drill point, and a plurality of pins of the electronic components can be inserted and then welded to form electrical connection.

In addition, in order to reduce the production cost, printed circuit boards, IC carrier boards, etc. are all processed simultaneously by using multiple layers of laminated boards, because the drill pin is generally provided with a spiral chip removal groove at present, and the waste chips cut by the cutting edge are discharged outwards along the chip removal groove, but because the two chip removal grooves of the drill pin are spirally surrounded in a staggered manner, the width of the chip removal groove is limited and only has a smaller width, and the smoothness of chip removal is affected.

Therefore, how to solve the chip removal function of the drill bit and maintain the rigidity and strength of the structure, the subsequent problems and troubles of the deficiency and derivation between the two are the urgent needs of the related manufacturers in the industry to research and improve.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above problems and disadvantages, an object of the present invention is to provide an improved structure of a three-blade drill.

The utility model provides an improvement structure of three sword formula drill points, its characterized in that: the drill bit comprises a drill bit, wherein the drill bit is provided with a handle part, one side of the handle part extends to form a cutting part, a groove part is arranged between the cutting part and the handle part, one side of the cutting part, which is opposite to the handle part, is provided with three cutting faces which are arranged in an annular mode, edges are respectively formed at the connection part of every two adjacent cutting faces, sharp points are formed at the intersection part of the three edges, chip grooves which extend spirally towards the handle part are arranged at one side edge of the outer edge surface of the drill bit connected between every two adjacent cutting faces, and grooves which are in a V shape are respectively arranged at the surface part of every chip groove connected with every edge.

The improved structure of the three-blade drill point is as follows: the bottom of each groove is an arc-shaped arc surface.

The improved structure of the three-blade drill point is as follows: the three-edge surface is provided with cutting points at the outer edge surface of the drill point far away from the sharp point and at one end adjacent to each ridge respectively, the bottom of each groove is provided with an end point at one end far away from the sharp point respectively, and each cutting point, another adjacent cutting point and each corresponding end point of the three-edge surface form a three-point collinear line.

The improved structure of the three-blade drill point is as follows: the drill point is a micro drill point.

The improved structure of the three-blade type drill point is characterized in that: the handle part is of a straight handle type or an undercut type structure.

The utility model discloses borrow this to promote better incomplete bits discharge effect to make the drill point produce in the in-process of drilling and block in the unlikely unnecessary incomplete bits that makes, and then reduce because of the produced high temperature of incomplete bits, borrow this to avoid the drill point to take place to crack, cracked possibility, with the purpose of the pore wall quality of the hole when promoting the drilling.

The groove is an arc-shaped arc surface at the bottom of the recess to increase the chip removal efficiency and reduce the formation of blockage caused by accumulated chips in each groove, an end point is arranged at one end of a far sharp point at the bottom of the groove, a cutting point is arranged at the outer edge surface of the drill point at one side of the far sharp point of each blade surface and at one end of an adjacent ridge line, and three-point collinear lines are formed between another adjacent cutting point of each blade surface and each end point, so that the stability of the drill point during drilling is provided, the phenomena of fracture and cracking are prevented, and the service life of the drill point is prolonged.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the present invention.

Description of the reference numerals: 1, drilling a needle; 11-a handle; 12-a blade part; 121-a blade face; 1211-cutting point; 122-ridge; 123-cusp; 13-a trough portion; 131-chip grooves; 14-a groove; 141-arc surface; 142-an endpoint; a-three points are collinear.

Detailed Description

To achieve the above objects and advantages, the preferred embodiments of the present invention, as well as the structure and method of operation thereof, will be described in detail with reference to the accompanying drawings for better understanding.

Referring to fig. 1 and 2, which are a perspective view and a front view of the present invention, the present invention provides an improved structure of a three-edge drill point, including a drill point 1, the drill point 1 has a shank 11, a blade portion 12 extends from one side of the shank 11, a groove 13 is disposed between the blade portion 12 and the shank 11, a ring-shaped triple-edged surface 121 is disposed on one side of the blade portion 12 opposite to the shank 11, each blade surface 121 is a tangent plane with the same grinding angle, so that each blade surface 121 is connected to another adjacent blade surface 121 to form a ridge line 122, a sharp point 123 is formed at the intersection of the triple-edged lines 122, and a cutting point 1211 is disposed at one end of the adjacent ridge line 122 of each blade surface 121 on the side of the drill point 123.

The flute 13 is provided with three flutes 131 spirally extending toward the shank 11 at the surface of the outer edge of the drill bit 1 where each edge face 121 is connected to one side of the adjacent edge face 121, grooves 14 with the same grinding angle in a V shape are respectively arranged at the positions where each ridge 122 is connected to the surface of each flute 131, the bottom of each groove 14 is an arc-shaped arc face 141, and an end point 142 is arranged at one end of the groove 14, which is far from the tip point 123.

The utility model discloses an improvement structure of three sword formula drill pins is when in actual application, be with the sharp point 123 contact of drill pin 1 on the surface of predetermineeing the circuit board, borrow this drill pin 1 to rotate each flank 121 that makes its cutting part 12 and cut and bore into predetermineeing the circuit board, it has a hole to make on this predetermineeing the circuit board, and at the in-process of boring, the recess 14 that does not concave the establishing on this each chip groove 131 can assist each chip groove 131 to carry out the chip removal operation, and see through the position that sets up of each recess 14, can more rapid bore into predetermineeing the circuit board when boring the operation, make drill pin 1 in the in-process of drilling unlikely to make unnecessary incomplete bits produce the jam, and then reduce the chip removal that produces because of the incomplete bits, borrow this to avoid drill pin 1 to take place the chip removal, cracked possibility, with the mesh of the pore wall quality of hole when promoting the drilling, and see through the arc surface 141 that each recess 14 is used for increasing efficiency, in order to reduce to pile up the sweeps and remain and form the jam in each recess 14.

And the drill point 1 with three edge surfaces 121 requires more structural strength and stability than the drill point with two edge surfaces during drilling, and the preferred embodiment of the present invention forms three collinear points a adjacent to another cutting point 1211 and each end point 142 of each cutting point 1211 of each edge surface 121, thereby providing stability of the drill point 1 during drilling, preventing the occurrence of fracture and spalling, and prolonging the service life of the drill point 1.

In addition, the drill bit 1 may be a conventional drill bit or a micro drill bit, and may have a straight shank type or an undercut type structure on the shank 11, and may be formed integrally with or separately from the groove 13.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An improvement structure of three sword formula drill points which characterized in that: the drill bit comprises a drill bit, wherein the drill bit is provided with a handle part, one side of the handle part extends to form a cutting part, a groove part is arranged between the cutting part and the handle part, one side of the cutting part, which is opposite to the handle part, is provided with three cutting faces which are arranged in an annular mode, edges are respectively formed at the connection part of every two adjacent cutting faces, sharp points are formed at the intersection part of the three edges, chip grooves which extend spirally towards the handle part are arranged at one side edge of the outer edge surface of the drill bit connected between every two adjacent cutting faces, and grooves which are in a V shape are respectively arranged at the surface part of every chip groove connected with every edge.

2. The improved structure of the three-edged drill as defined in claim 1, wherein: the bottom of each groove is an arc-shaped arc surface.

3. The improved structure of the three-blade drill bit as claimed in claim 1, wherein: the three-edge surface is provided with cutting points at the outer edge surface of the drill point far away from the sharp point and at one end adjacent to each ridge respectively, the bottom of each groove is provided with an end point at one end far away from the sharp point respectively, and each cutting point, another adjacent cutting point and each corresponding end point of the three-edge surface form a three-point collinear line.

4. The improved structure of the three-edged drill as defined in claim 1, wherein: the drill point is a micro drill point.

5. The improved structure of the three-edged drill as defined in claim 1, wherein: the handle part is of a straight handle type or an undercut type structure.