CN213437396U - Burr removing drill point structure - Google Patents

Abstract

The utility model relates to a deburring drill point structure, two cutting blade centers of this drill point are for being formed with the concave part, and two cutting blade terminal surfaces all have and lie in the center one side outer fringe and cross the first blade face that the center extends to the opposite side forward from the back forward, and two first blade faces respectively backward reverse oblique extensions form and have the second blade face, and the junction of two first blade faces and second blade face is formed with the first drill point that is the bulge form, and two cutting blade outer fringe respectively with the second blade face jointly protruding have the second drill point that length is greater than first drill point length of stretching outwards, it because of the drilling process for contact guide location in advance through two second drill points, and pass the circuit board, the torsion that contacts when making the drill point rotate and produce on the circuit board surface reduces by a wide margin, and then effectively avoid the drill point to produce the condition of beat or rocking, so make drilling processing operation more stable, and the burr can be reduced, thereby improving the drilling precision and the qualification rate.

Description

Burr removing drill point structure

Technical Field

The utility model relates to a unhairing limit's drill point structure indicates that the first and second cutting edge face junction of two cutting edges of drill point is formed with first drill point especially, and two cutting edge outer fringe respectively with the second cutting edge face common protruding second drill point that has length to be greater than first drill point length that stretches, its two second drill points for can pass the circuit board earlier, make the torsion on the circuit board surface reduce, and then promote the drilling precision.

Background

Under the trend of light, thin, short and small electronic products, the volume requirements of various electronic products become smaller, so that the manufacturing process of various electronic components inside the electronic products becomes more and more precise, and the volume of the printed circuit board for the electronic component group in the electronic products must be reduced, so that in the process of manufacturing the printed circuit board, a drill or a micro drill is mostly used for hole processing, and a plurality of pins of the electronic components can be inserted and then welded to form electrical connection.

Furthermore, in order to reduce the production cost, the printed circuit board, IC carrier and the like are processed simultaneously by using a plurality of stacked boards, so as to match the miniaturization and the array of the electronic component package, and the printed circuit board is continuously increased in density to meet the demand, so that manufacturers develop a High Density Interconnect (HDI) board, which has the advantages of small volume, high speed, high frequency and the like, and is widely used in personal computers, portable computers, mobile phones and Personal Digital Assistants (PDAs), and the demand for use is more and more thin, so that the difficulty of the current drilling needle in drilling is relatively increased, and the biggest problem is that the peripheral holes after drilling are not consistent in copper foil eversion.

Because the common drill point is designed to reduce the axial force of axial drilling, the drill point of the drill point is usually very thin and gradually thickens from the center of the circle to the outside, and the edges of the two blades are thick, the rotary cutting capability of the drill point is very strong, so that the drill point can be suitable for drilling operation, however, because the thickness of the high-density connecting plate is increasingly thin, if the drill point of the drill point directly props against the high-density connecting plate for drilling operation, the high-density connecting plate is easy to deform under stress, and inconsistent copper foil layer evagination burrs are generated around the hole after the blades are cut, and the cut scraps can be blocked between the drill point and the hole wall to be mutually scraped when being discharged along a chip discharge groove outwards, so that the surface of the hole wall is rough, the abrasion and damage of the blades can be accelerated when the drill point rotates at high speed, the temperature can also rise rapidly due to overlarge friction resistance, and the cooling effect is poor, in addition, the drill bit is prone to crack or break due to the glue residue generated by the hot melting of the high-temperature chips, which is the direction for those skilled in the art to find a new approach.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above-mentioned shortcomings, the present invention provides a novel patent for designing a burr-removed drill point structure by collecting relevant data and evaluating and considering in multiple ways.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a drill point structure of deckle edge which characterized in that: this drill point includes bores body portion and bores the slot part, wherein:

the drill point is provided with a drill groove part extending outwards at one side of the drill body part, two cutting blades are arranged at one end of the drill groove part far away from the drill body part, a concave part is formed at the center of the two cutting blades, the end faces of the two cutting blades are provided with first blade faces which are arranged at the outer edge of one side of the center and extend from the back to the front to the other side over the center, the two first blade faces respectively extend backwards and reversely to form second blade faces, a convex first drill point is formed at the joint of the two first blade faces and the second blade faces, the outer edges of the two cutting blades respectively protrude outwards with the second blade faces to form a second drill point with the length being larger than that of the first drill point, and an included angle is formed between the first drill point and the second drill point.

The deburring drill point structure, wherein: the included angle is between 90 degrees and 150 degrees.

The utility model has the main advantages that one side of the drill body of the drill point extends outwards to form a drill groove part, the drill groove part is provided with two cutting blades far away from the other end of the drill body, a concave part is formed at the center of the two cutting blades, the end faces of the two cutting blades are provided with a first blade face which is positioned at the outer edge of one side of the center and extends from the center to the other side forwards to form a lateral inclination, the two first blade faces are respectively inclined backwards and reversely to form a second blade face, the joint of the two first blade faces and the second blade face is provided with a convex first drill point, the outer edges of the two cutting blades respectively protrude outwards with the second blade face to form a second drill point with the length larger than that of the first drill point, an included angle is formed between the first drill point and the second drill point, the two second drill points can be contacted, guided and positioned in advance in the drilling process, and can firstly break through a circuit board by the two second drill points, the torsion that alright contact produced on the circuit board surface when making the drill point rotate reduces by a wide margin, and then effectively avoids the drill point to produce the condition emergence of beat or rocking, so makes whole drilling processing operation more stable to reducible unedged production, thereby reach the purpose that promotes drilling precision and qualification rate.

Drawings

Fig. 1 is a side view of the present invention before drilling.

Fig. 2 is a side view of the present invention after drilling.

Description of reference numerals: 1-drilling a needle; 11-a drill body part; 12-drilling a slot part; 13-a cutting blade; 131-a recess; 132-a first blade face; 133-a second edge face; 134-a first drill tip; 14-a second drill tip; 2-a circuit board; 21-hole.

Detailed Description

To achieve the above objects and advantages, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Please refer to fig. 1 and fig. 2, which are a side view before drilling and a side view after drilling, as can be clearly seen from the drawings, the drill point 1 of the present invention includes a drill body portion 11 and a drill slot portion 12, wherein:

the drill point 1 is provided with a drill groove part 12 extending outwards at one side of the drill body part 11, and is provided with two cutting blades 13 at the other end of the drill groove part 12 far away from the drill body part 11, and a concave part 131 is formed at the center of the two cutting blades 13, and the end faces of the two cutting blades 13 are provided with first blade faces 132 which are positioned on the outer edge of one side of the center and extend from back to front to the other side beyond the center to form a side inclination shape, and the two first blade surfaces 132 respectively extend backwards and reversely to form second blade surfaces 133, and convex first drill tips 134 are formed at the joints of the two first blade surfaces 132 and the second blade surfaces 133, and the two cutting blades 13 are respectively provided with a second drill point 14 which is protruded outwards along with the second blade surface 133 and has a length longer than that of the first drill point 134, an included angle theta is formed between the first drill tip 134 and the second drill tip 14, and the included angle theta is between 90 degrees and 150 degrees.

Furthermore, the diameter of the drill bit 1 may be larger than 0.2mm, such as a general drill bit or a micro drill bit, and the shank 11 of the drill bit 1 may be a Straight shank (Straight) or an Undercut (Undercut) type, and may be formed integrally with or separately from the groove 12.

When the drill point 1 of the present invention is used in drilling operation, the drill point 1 can be firstly abutted against the surface of the circuit board 2, because the length of the two second drill points 14 of the drill point 1 is greater than the length of the first drill points 134 of the two cutting blades 13, the drill point 1 can be firstly contacted with the surface of the circuit board 2 for guiding and positioning, and when the drill point 1 is used in drilling, the drill hole can be firstly drilled through the two second drill points 14, and when the first drill points 134 of the two cutting blades 13 are contacted with the surface of the circuit board 2, the drill point 1 can be rotated to form the hole 21 which is penetrated through from top to bottom on the circuit board 2, however, the cuttings generated in the drilling process can be rapidly discharged by using the drill slot portion 12, because the two second drill points 14 are firstly contacted for guiding and positioning in the drilling process, and the two second drill points 14 can be used for penetrating through the circuit board 2, so that the torsion generated on the surface of the circuit board 2 when the drill point 1 rotates can be greatly reduced, and then effectively avoid the condition that the drill point 1 produced the beat or rocked to take place, so make whole drilling processing operation more stable to the production of reducible deckle edge, thereby reach the effect that promotes drilling precision and qualification rate.

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 (2)

1. The utility model provides a drill point structure of deckle edge which characterized in that: this drill point includes bores body portion and bores the slot part, wherein:

the drill point is provided with a drill groove part extending outwards at one side of the drill body part, two cutting blades are arranged at one end of the drill groove part far away from the drill body part, a concave part is formed at the center of the two cutting blades, the end faces of the two cutting blades are provided with first blade faces which are arranged at the outer edge of one side of the center and extend from the back to the front to the other side over the center, the two first blade faces respectively extend backwards and reversely to form second blade faces, a convex first drill point is formed at the joint of the two first blade faces and the second blade faces, the outer edges of the two cutting blades respectively protrude outwards with the second blade faces to form a second drill point with the length being larger than that of the first drill point, and an included angle is formed between the first drill point and the second drill point.

2. The deburred drill pin structure of claim 1, wherein: the included angle is between 90 degrees and 150 degrees.

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