JP3170107U - Improved debris groove structure of drill head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved debris groove structure of a drill head capable of improving a quick debris effect during a drilling operation of a drill head and extending a service life. SOLUTION: A cutting blade 13 is provided at a tip portion of a drill groove portion 12 of a drill head 11 with respect to a drill body portion 11 so as to face each other, and two cutting blade side portions exhibit different spiral angles in the direction of the drill body portion. The waste groove 14 and the secondary waste groove 15 are provided in an annular shape, and the secondary waste groove and the main waste groove are not parallel and are extended to form a groove merging point where they intersect with each other. Intermittently extend to the drill groove in a ring shape. [Selection diagram] Fig. 1

Description

The present invention relates to an improved waste groove structure for a drill head, and in particular, a main waste groove and a secondary waste groove that are annularly provided at two cutting blade side portions of a drill groove portion of the drill head intersect with each other instead of being parallel to each other. After that, the width of the waste groove and the thickness of the core of the drill head are increased by extending the secondary waste groove from the secondary waste groove to the drill groove portion in an intermittent manner toward the drill body. The present invention relates to an improvement in the structure of a waste groove of a drill head that assists in waste and improves overall structural strength.

  In the current trend of light and thin design of electronic products, various electronic products are required to be smaller than the volume, so the manufacturing process of various electronic components inside the electronic products becomes more and more precise. In the product, the volume of the printed circuit board in which the electronic member can be incorporated and localized needs to be reduced accordingly. Therefore, in the manufacturing process of the printed circuit board, a drill head or a micro drill head is often used. Drilling is performed, and a plurality of connection pins of the electronic member are inserted and fixed by welding to form an electrical connection.

  Furthermore, in order to reduce the production cost of printed circuit boards, IC boards, etc., both employ the simultaneous processing of multi-layer laminates. Currently, two drill heads on the market are mostly in the axial direction of the drill head. Are provided in a ring shape, and the chips cut by the blade are discharged to the outside along the waste grooves, but the two waste grooves of the drill head have an interlaced spiral shape. It is wound and has only a relatively small width, limited by the width of the waste groove, which affects the smoothness of the waste, and chips accumulate between the waste groove and the hole wall of the drill head When the situation occurs, the chips get stuck between the drill head and the hole wall and rub against each other to roughen the drilled wall surface. In addition, the spiral waste groove provided in an annular shape on the drill head also significantly reduces the thickness of the core inside the drill head, reducing the overall strength of the drill head and reducing the cutting edge of the cutting blade when the drill head rotates at high speed. Accelerates wear and damage, and at the same time excessive frictional resistance raises its temperature rapidly, resulting in a poor cooling effect. Those skilled in the art are subject to improvement in research, such as causing the protrusion phenomenon without causing the plates to be joined tightly and making the drill head more likely to crack or cut.

Therefore, in light of the problems and deficiencies in the use of conventional drill heads, the inventor of the present application collects relevant data, and through continuous evaluation and consideration, R & D experience working for many years in the industry makes prototyping and correction continuously. Finally, an improved waste groove structure for this type of drill head was devised.

JP 2001-341018 A

An object of the present invention is to provide cutting blades opposite to each other at the tip end portion of a drill body portion of a drill groove portion of a drill head, and to provide a main waste groove that exhibits different spiral angles in the drill body portion direction at two side portions of the cutting blade, Drilled intermittently from the secondary waste groove toward the drill body after the secondary waste groove and the secondary waste groove and the primary waste groove are formed to extend rather than parallel to each other to form a groove merging point. Extending annularly to the groove, this structure not only increases the width of the waste groove and increases the waste speed, but also winds up after the merger over most of the length of the drill groove It has only an extended waste groove, that is, it can increase the thickness dimension of the drill drill head core inside the waste groove, improve the structural strength of the entire drill head, and tear the drill head during drilling work Decrease decrease, It is that it is possible to effectively prolong the service life of Riruheddo.

The improvement of the waste groove structure of the drill head according to the present invention includes a drill body part and a drill groove part extending outwardly at a position located on one side of the drill body part, and cutting the drill groove part facing the tip part of the drill body part. It is an improvement in the structure of the waste groove of the drill head provided with the blade, and the main waste groove and the secondary waste groove that present different spiral angles in the direction of the drill body at the two side portions of the drill groove are annularly formed. Drill edge provided at the center of the two cutting blades, with the auxiliary waste groove extending to a predetermined length and intersecting each other without being parallel to the main waste groove and forming a groove merging point Between 20% and 75% of the length of the main waste groove and the small helix angle of the location located at the groove merge point of the drill groove corresponds to the main waste A waste groove corresponding to a large spiral angle is a secondary waste groove, Greater than during the helix angle 5 ° to 50 ° of Haikuzumizo, characterized in that it extended to wind around the further intermittent drill groove portion portion from the sub-discharge debris groove to the drill body direction.

The improvement in the structure of the debris groove of the drill head of the present invention has the following advantages in actual use:
1.
The drill groove portion 12 of the drill head 1 according to the present invention is provided with a main waste groove 14 and a sub waste groove 15 which have different spiral angles in an annular shape, and the sub waste groove 15 and the main waste groove 14 are in the direction of the drill body portion 11. The width of the waste groove 16 is increased by a structure that extends so as not to be parallel to each other and intersects with each other, and then extends so as to be intermittently wound around the auxiliary waste groove 15 and wound around the 12 positions of the drill groove. It is possible to assist the quick debris during the drilling operation of 1, prevent the debris from being easily deposited or clogged, and efficiently prevent the phenomenon of cracking or tearing of the drill head 1.
2.
After the auxiliary waste groove 15 and the main waste groove 14 provided in an annular shape at the location located in the drill groove portion 12 of the drill head 1 of the present invention are extended and intersected without being parallel, the width of the entire waste groove is increased. It is possible to improve the speed of the waste, and the drill head inside the waste groove is provided with only the waste groove extending so that most of the length on the drill groove 12 is wound after the merge. 1 core thickness can be increased, the structural strength of the drill groove 12 and the drill head 1 as a whole is improved, the phenomenon of tearing during drilling of the drill head 1 is reduced, and the service life of the drill head 1 is reduced. Can be extended efficiently.

It is a three-dimensional external view of the present invention. It is a side view of this invention. FIG. 3 is a local enlarged view of FIG. 2 of the present invention. It is a front view of the cutting part direction of this invention.

In order to achieve the above-mentioned objects and effects, the technical means employed by the present invention and the structure thereof will be described in detail with reference to the drawings.

Please refer to FIG. 1, FIG. 2, FIG. 3, and FIG. These are a three-dimensional external view of the present invention, a side view, a local enlarged view of FIG. 2 and a front view in the direction of the cutting blade. As can be seen from the figure, the drill head 1 of the present invention includes a drill body portion 11 and a drill groove portion. 12, a drill groove portion 12 is extended from one end side of the drill body portion 11 of the drill head 1 to the outer periphery thereof, a cutting blade 13 facing the tip end portion of the drill body portion of the drill groove portion 12 is provided, and 2 of the drill groove portion 12 is provided. The locations located on the sides of the two cutting blades 13 are provided with the main waste groove 14 and the auxiliary waste groove 15 in an annular shape in the direction of the drill body 11, and the main waste groove 14 and the auxiliary waste groove 15 have different rotation angles. The auxiliary waste grooves 15 are extended so as to wind up to a predetermined length, intersect with each other without being parallel to the main waste grooves 14, and form the groove merging point 16. Waste groove 15 is identical to main waste groove 14 Extended as the wind around the drill groove 12 places the drill body 11 direction by different flipping angles.

Further, the drill head 1 is a general type drill head or a micro-type drill head, and the drill body portion 11 is a straight type or an undercut type, such as a drill groove portion. 12 are formed integrally with each other or separated from each other, and the portions located at the outer edges of the two cutting blades 13 of the drill groove 12 are respectively provided with gaps 131, and the depth of each gap 131 is determined by the drill head. Although it is suitable that it is between 1% and 40% of the diameter of 1, the gap 131 does not need to be installed in the drill groove 12 at the time of actual application.
The length of the auxiliary waste groove 15 of the drill groove 12 is between 80% and 120% of the length of the main waste groove 14, and the auxiliary waste groove 15 is extended so as to be wound to a predetermined length. The main waste groove 14 intersects with each other to form a groove merging point 16, and the waste groove corresponding to the small spiral angle at the 16 groove merging points is the main waste groove 14, and the larger spiral angle corresponds to the main waste groove 14. The waste dust groove is the secondary waste groove 15, and the spiral angle (θ 2) at the 16 groove merging points of the secondary waste groove 15 is made larger than the spiral angle (θ 1) of the primary waste groove 14, and one 5 ° to The axial length (L) from the drill edge 130 to the groove merging point 16 which is installed so as to form a sandwiching angle (θ3 = θ2−θ1) between 50 ° and which is provided at the center of the two cutting blades 13 is , And between 20% and 75% of the length of the main waste groove 14.
Further, the spiral angle after merging the auxiliary waste groove 15 and the main waste groove 14 at 16 groove joint points can be changed, and the helical angle (θ5) of the auxiliary waste groove 15 and the main waste groove 14 is installed so as to form a pinching angle (θ6 = θ5-θ4) of 0 ° to 20 ° between the spiral angles (θ4) after crossing each other, and by the structural design of the drill groove 12, After extending so as to wrap around a portion located in the drill groove portion 12 of the sub-scraping groove 15 and communicating with each other without being parallel to the main scraping groove 14, the width of the whole scraping groove is increased, and the speed of the scraping is increased. And the length of most of the length on the drill groove 12 has only a waste groove that winds and extends at the time of merger, and increases the thickness dimension of the core of the drill head 1 inside the waste groove, The overall structural strength of the drill groove 12 and the drill head 1 is improved, and the drill head 1 is removed during the drilling process. Through the main waste groove 14 and the secondary waste groove 15 of the two different spiral angles of the rill groove 12, the waste is quickly discharged, and the defects in which the waste gets stuck in the main waste groove 14 and the secondary waste groove 15 are reduced. In addition, it is possible to efficiently prevent the occurrence of cracking or tearing during the drilling operation of the drill head 1 and to ensure better drilling hole quality.

Accordingly, the present invention provides the main waste grooves 14 and the secondary waste grooves 15 having different spiral angles in the direction of the drill body 11 at the two side portions of the two cutting blades 13 provided by the drill groove 12 of the drill head 1 in an annular shape. The auxiliary waste grooves 15 and the main waste grooves 14 are formed so as to extend without being parallel to the drill body portion 11 and intersect with each other, and then are intermittently wound from the auxiliary waste grooves 15 so as to wind around the drill groove portions 12. The main feature is that the width of the waste groove is increased, the effect of assisting the rapid waste of the drill head 1 is achieved, and the waste during the drilling operation is quickly discharged. Is accumulated in the main waste groove 14 and the secondary waste groove 15 and is reduced in length, and most of the length distance on the drill groove 12 is the waste that the grooves are wound and extended after merging. It only has a groove, and the drill head inside the waste groove 16 It is possible to increase the thickness dimension of the core of 1 and improve the structural strength of the entire drill head 1, thereby efficiently preventing the occurrence of tearing during drilling work of the drill head 1, The service life of the head 1 can be extended.

The improvement in the structure of the debris groove of the drill head of the present invention has the following advantages in actual use:
3.
The location located in the drill groove portion 12 of the drill head 1 of the present invention is provided with a main waste groove 14 and a secondary waste groove 15 having different spiral angles in an annular shape, and the secondary waste groove 15 and the primary waste groove 14 are drilled. The width of the waste groove 16 is increased by a structure that extends so as not to be parallel to the direction of the body part 11 and intersects with each other, and then extends so as to be intermittently wound around the auxiliary waste groove 15 and wound around the 12 positions of the drill groove part. In addition, it is possible to assist the rapid waste disposal during the drilling operation of the drill head 1, prevent the waste from being easily deposited or clogged, and efficiently prevent the drill head 1 from cracking or tearing.
Four.
After the auxiliary waste groove 15 and the main waste groove 14 provided in an annular shape at a position located in the drill groove portion 12 of the drill head 1 of the present invention are formed so as to extend without being parallel, the width of the entire waste groove By providing only the waste groove extending so that most of the length on the drill groove 12 is wound after merging, the speed of the waste is increased. The thickness of the core of the drill head 1 is increased, the structural strength of the drill groove 12 and the entire drill head 1 is improved, the phenomenon of tearing during drilling of the drill head 1 is reduced, and the service life of the drill head 1 is increased. Can be extended efficiently.

In the present invention, the preferred embodiments have been disclosed as described above. However, the present invention is not limited to the present invention, and anyone who is familiar with the technology can make an equivalent range without departing from the spirit and scope of the present invention. Of course, various fluctuations and hydration colors can be added.

DESCRIPTION OF SYMBOLS 1 Drill head 11 Drill body part 12 Drill groove part 13 Cutting blade 130 Drill edge 131 Crevice 14 Main waste groove 15 Secondary waste groove 16 Groove merge point

Claims (4)

An improved waste groove structure of a drill head comprising a drill body part and a drill groove part extended on the outer periphery of the drill body part, and provided with a cutting blade facing the drill body part tip portion of the drill groove part,
A main waste groove and a secondary waste groove are annularly provided at two drilling blade side edges of the drill groove portion at the tip of the drill body portion in a direction toward the drill body, and the secondary waste groove is provided in an annular shape. The length from the drill edge to the groove merging point provided at the center of the two cutting blades, which is formed to extend up to a specified length without being parallel to the main waste groove and intersects each other to form a groove merging point. Is between 20% and 75% of the length of the main waste groove, and the waste groove corresponding to the small helix angle at the position where the drill groove portion is merged is the main waste groove, which is a large spiral. The waste groove corresponding to the corner is a secondary waste groove, which is larger than the spiral angle of the main waste groove between 5 ° and 50 °, and is further intermittently cut from the secondary waste groove toward the drill body portion. An improved debris ditch structure for a drill head, characterized in that it extends so as to wrap around a point.   2. The improved waste groove structure for a drill head according to claim 1, wherein the length of the auxiliary waste groove of the drill groove is between 80% and 120% of the length of the main waste groove.   After the auxiliary waste groove and the main waste groove of the drill groove intersect each other, the auxiliary waste groove extends from the auxiliary waste groove so as to wrap around the drill groove portion in the direction of the drill body with the same or different spiral angle as the main waste groove. The drill head according to claim 1, wherein a narrow angle of 0 ° to 20 ° is formed between the spiral angle of the auxiliary waste groove and the spiral angle after the main waste groove intersects with each other. Improved waste gutter structure. A gap is provided in each of the drill groove portions located at the outer edges of the two cutting blades, or no gap is provided, and the depth of each drill groove portion is between 1% and 40% of the diameter of the drill head. The improved waste groove structure for a drill head according to claim 1, wherein

Images