TWM639121U - Structural improvement of three-edged drilling bit - Google Patents

Abstract

This work is a structural improvement of a three-edged drill, including a drill with a handle, a blade on one side of the handle, and a groove between the blade and the handle , and the other side of the blade opposite to the shank is respectively provided with three edge surfaces arranged in a ring shape, and each edge surface is a cut surface set at the same grinding angle, so that each edge surface is connected to the adjacent other edge Ridge lines are formed on the surface respectively, and the grooves are respectively recessed with chip removal grooves extending spirally toward the shank at the places where each edge surface is respectively connected to the adjacent edge surface and one side connects to the outer edge surface of the drill. Each ridge line is connected to each flute surface, and there are "V"-shaped grooves with the same grinding angle, so as to improve the better debris discharge effect and avoid the possibility of cracking and breaking of the drill , to improve the quality of the hole wall during drilling.

Description

Structural improvement of the three-edged drill

This work is related to the improvement of the structure of a three-edged drill, especially refers to the three-cutting edge of the cutting edge of the drill connected to the adjacent other cutting edge to form ridges, and each ridge is connected to the surface of each chip removal groove for processing A groove is provided to improve the effect of debris discharge and prevent the formation of clogging, thereby avoiding the possibility of cracking and breaking of the drill bit, so as to improve the quality of the hole wall during cutting.

According to the trend of today's electronic products towards thinner and smaller designs, the volume requirements of various electronic products have become smaller, so the manufacturing and processing of various electronic components inside electronic products will become more and more sophisticated, and make electronic products The size of the printed circuit board that can be used for setting the position of the electronic component group must also be reduced accordingly. Therefore, in the manufacturing process of the printed circuit board, most of the drill needles are used for the mechanical drilling process of the circuit substrate processing, and the plurality of electronic components can be provided. After the pins are inserted, they are soldered to form an electrical connection.

In addition, in order to reduce production costs, printed circuit boards and IC substrates are all processed with multi-layer laminates at the same time. At present, the general drill ring is equipped with a spiral chip removal groove, and the waste chips after cutting the blade Discharge outward along the chip flute, but because the two chip flutes of the drill needle present a staggered helical circle, the width of the chip flute will be limited and only have a small width, which will affect the smoothness of chip removal. If there is accumulation of chips between the drill bit flute and the hole wall, it will lead to Cause chips to block and scrape between the drill and the hole wall, resulting in rough surface of the hole wall, and when the drill rotates at high speed, if the structure or rigidity of the drill edge is insufficient, the wear and damage of the cutting edge will be accelerated, and at the same time It is also prone to cracking or breaking, which needs to be improved.

Therefore, how to solve the deficiencies and subsequent problems and troubles in the chip removal function of the drill and maintain the rigidity of the structure is the direction that relevant manufacturers engaged in this industry want to study and improve.

Therefore, in view of the above-mentioned problems and deficiencies, the creators collected relevant information, evaluated and considered in many ways, and based on years of experience accumulated in this industry, after continuous trial and modification, they designed this kind of three-edged drill. A new patent for structure improvement of the needle was born.

The main purpose of this creation is to improve the structure of the three-edged drill, which includes a drill with a handle, and a blade with multiple blades extending from one side of the handle. There is a groove between the shank and the shank, and the other side of the blade opposite the shank is respectively provided with three edge surfaces arranged in a ring shape, and each edge surface is a cut surface set at the same grinding angle, so that each The blade surface is connected to the adjacent other blade surface to form ridges respectively, and the grooves are respectively recessed at the places where each blade surface connects to the adjacent other blade surface and connects to the outer edge surface of the drill, and is spiral toward the handle. There are three chip flutes extending in the same shape, and there are "V"-shaped grooves at the same grinding angle at the places where each ridge line connects each chip flute surface, so as to improve the better debris discharge effect and During the drilling process, the drill will not be blocked by excess debris, thereby reducing the high temperature generated by the debris, thereby avoiding the possibility of cracking and breaking of the drill, and improving the hole wall during drilling purpose of quality.

Another purpose of this creation is that the groove is arc-shaped at the bottom of the depression The circular arc surface is used to increase the efficiency of chip removal to reduce the accumulation of waste chips remaining in each groove to form a blockage, and the groove is provided with an end point at the far point of the bottom, and each blade surface is on the side of the far point There is a cutting point on the outer edge surface of the drill and one end adjacent to the ridge line, and each cutting point on each blade surface is adjacent to another cutting point and each end point to form a three-point collinear, thereby providing the drill for drilling Stability during cutting, to prevent breakage and cracking, and to prolong the service life of the drill bit.

1: drill

11: handle

12: Blade

121: blade surface

1211: cutting point

122: Ridge

123: sharp point

13: Groove

131: chip flute

14: Groove

141: arc surface

142: endpoint

A: Three points collinear

[Picture 1] is a three-dimensional appearance diagram created for this work.

[Picture 2] is the view before this creation.

In order to achieve the above-mentioned purpose and effect, the technical means adopted in this creation, its structure, and the method of implementation, etc., are hereby drawn to illustrate in detail the characteristics and functions of the preferred embodiment of this creation as follows, so as to fully understand it.

Please refer to Figures 1 and 2, which are the three-dimensional appearance diagram and front view of this creation. The structural improvement of the three-edged drill of this creation includes a drill 1, which has a handle 11, and One side of the shank 11 extends with a blade 12, and a groove 13 is provided between the blade 12 and the shank 11, and the other side of the blade 12 opposite to the shank 11 is respectively provided with a circular arrangement. Three edge surfaces 121, and each edge surface 121 is a cutting surface set at the same grinding angle, so that each edge surface 121 is connected to another adjacent edge surface 121 to form a ridge line 122, and the intersection of the three ridge lines 122 A sharp point 123 is formed, and each blade surface 121 is provided with a cutting point 1211 at the outer edge surface of the drill 1 on the side far from the sharp point 123 and adjacent to the edge 122 .

The above-mentioned groove portion 13 is connected to the adjacent other blade surface 121 on each blade surface 121 respectively. The outer edge surface of the side connecting drill bit 1 is respectively recessed with three chip removal flutes 131 extending spirally toward the handle 11, and each ridge line 122 is respectively recessed at the surface of each chip removal flute 131. The same grinding angle is a "V"-shaped groove 14, and the bottom of the three grooves 14 is an arc-shaped arc surface 141. There is endpoint 142.

The structure improvement of the three-edged drill bit of the present invention is to make the sharp point 123 of the drill bit 1 contact the surface of the preset circuit board, and make each edge of the cutting edge 12 by rotating the drill bit 1. The surface 121 is cut and drilled into the preset circuit board, so that a hole is formed on the preset circuit board, and in the process of drilling, the grooves 14 that are individually recessed on the chip removal grooves 131 can assist each chip removal The grooves 131 carry out the chip removal operation, and through the setting positions of the grooves 14, it can be drilled into the preset circuit board more quickly during the drilling operation, so that the drill 1 will not cause unnecessary residues during the drilling process. Chips are blocked, thereby reducing the high temperature generated by the debris, thereby avoiding the possibility of cracking and breaking of the drill 1, in order to improve the quality of the hole wall during drilling, and through the circle of each groove 14 The arc surface 141 is used to increase chip removal efficiency, so as to reduce the blockage caused by accumulated waste chips remaining in each groove 14 .

And the drill bit 1 of the three-blade face 121 requires more structural strength and stability when drilling than the drill pin 121 of the two-blade face. Adjacent to another cutting point 1211 and each end point 142, three points collinear A are formed, thereby providing the stability of the drill 1 during drilling, preventing breakage and cracking, and thereby prolonging the life of the drill 1 purpose of service life.

In addition, the aforementioned drill 1 can be a general drill or a micro drill, and the shank 11 can be a straight shank or an undercut structure, and can be integrated with the groove 13 Formed or assembled separately.

The above is only a preferred embodiment of this creation, and does not limit the patent scope of this creation. Therefore, all simple modifications and equivalent structural changes made by using the instructions and drawings of this creation should be included in the same reasoning. Within the scope of the patent of this creation, I will cooperate with Chen Ming.

To sum up, the improvement of the structure of the three-edged drill bit in this creation can really achieve its effect and purpose when it is used. Therefore, this creation is a creation with excellent practicability. I have filed an application, hoping that the judging committee will approve this case as soon as possible, so as to protect the hard work of the creator. If the Junju judging committee has any doubts, please feel free to send a letter to instruct, and the creator will do its best to cooperate, and I really appreciate it.

1: drill

11: handle

12: Blade

121: blade surface

1211: cutting point

122: Ridge

123: sharp point

13: Groove

131: chip flute

14: Groove

142: endpoint

A: Three points collinear

Claims (5)

A structural improvement of a three-edged drill includes a drill, the drill has a shank, and a blade extends from one side of the shank, and a groove is provided between the blade and the shank , and the other side of the blade opposite to the shank is respectively provided with three blade surfaces arranged in a ring shape, and each blade surface is connected to the adjacent other blade surface to form a ridge line, and the intersection of the three ridge lines A sharp point is formed at the intersection, and the grooves are respectively provided with rows extending spirally toward the shank at the places where the blade surfaces are respectively connected to the adjacent side of the other blade surface and connected to the outer edge surface of the drill. Chip flutes, and grooves in the shape of a "V" are respectively provided at the places where the ridges connect the surfaces of the chip flutes. The structural improvement of the three-edged drill bit as described in Claim 1, wherein each groove is an arc-shaped arc surface at the bottom of the depression. The structural improvement of the three-edged drill according to claim 1, wherein the three-bladed surface is provided with cutting points at the outer edge surface of the drill on the side far from the sharp point and adjacent to the ends of the ridges, In addition, each groove is provided with an end point at the end far from the sharp point at the bottom, and each cutting point of the three-edge surface is adjacent to the other cutting point and forms three collinear points with each end point. The structural improvement of the three-edged drill as described in Claim 1, wherein the drill is a general drill or a micro drill. The structural improvement of the three-edged bur according to Claim 1, wherein the shank is a straight shank or undercut structure.

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