CN217546431U - PCB drill point - Google Patents

Abstract

The utility model belongs to the technical field of the drill point, a PCB drill point is disclosed. This PCB drill point, including needle handle and needle body, the needle body sets up the one end at the needle handle, be provided with toper point portion on the needle body, toper point portion includes knife face behind first back knife face and the second, two first back knife faces are the central symmetry along the center of rotation of needle body and set up, knife face is the central symmetry along the center of rotation of needle body behind two seconds and sets up, knife face intersects central line and the chisel edge of formation behind first back knife face and the second, be provided with vice knife face on the first back knife face, the symmetry is provided with the main chip groove of spiral extension on the needle body, the main chip groove forms the main cutting edge with the crossing department of vice knife face. This PCB drill point sets up vice back knife face on the first back knife face of needle body, and main cutting edge sets up on vice back knife face, can improve main cutting edge's wearability, has promoted the life of drill point, has practiced thrift the cost, has improved the machining efficiency of board.

Description

PCB drill point

Technical Field

The utility model relates to a drill point technical field especially relates to a PCB drill point.

Background

In the era of light, thin, short and small electronic products, the volume of various electronic products is gradually reduced, and the manufacture of various parts inside the electronic products is more and more precise. Accordingly, the related industry demand for Printed Circuit Boards (PCBs) is also increasing. With the rapid development of the printed circuit board industry, the precision and the efficiency of the numerical control machine tool are improved unprecedentedly, the requirements on a cutting tool are higher and higher, and besides comprehensive mechanical properties, the PCB drill point is required to have high hardness, high wear resistance, high hot hardness and enough toughness.

The PCB drill point is widely used as a cutting tool in the related industries of printed circuit boards. However, the existing PCB drill point generally has the problem of weak abrasion resistance at a cutting part in the practical application process, so that the service life of the existing PCB drill point is short, frequent replacement is needed in the application process, the consumption cost of a cutter is increased, and meanwhile, the machining efficiency of a machine table is greatly influenced because the drill point needs to be continuously replaced.

Therefore, there is a need for a PCB drill point to solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PCB drill point, PCB drill point wearability that can solve among the prior art is low, and is short-lived, needs frequently to change the cutter that the drill point caused and consumes with high costs, influences the machining efficiency's of board problem.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a PCB drill point, includes needle handle and needle body, and the needle body sets up the one end of needle handle, the needle body is kept away from the one end of needle handle is provided with toper point portion, toper point portion includes knife face and second after knife face, two first after knife face is followed the centre of rotation of needle body is central symmetry and sets up, two knife face is followed after the second the centre of rotation of needle body is central symmetry and sets up, first after knife face with the crossing formation central line of knife face and chisel edge after the second, be provided with vice knife face after the first knife on the face, the symmetry is provided with the main chip groove that the spiral extends on the needle body, main chip groove with the crossing department of vice knife face forms the main cutting edge.

Alternatively, the width of the minor flank surface gradually increases in a direction away from the center of rotation of the needle body along an intersection of the major cutting edge and the chisel edge.

Alternatively, the secondary relief surface is a flat surface or a curved surface, and the curved surface is curved toward the needle shank.

Alternatively, the distance between two primary flutes increases gradually in the direction of the needle shaft from the conical tip.

Alternatively, the angle of the helix angle of the primary flutes is 30 ° to 55 °.

As an alternative scheme, still be provided with limit sword structure on the needle body, limit sword structure includes vice chip groove, vice chip groove with the helix angle of main chip groove is the same.

Alternatively, the needle body and the needle handle are both made of a cemented carbide material.

Alternatively, the diameter of the needle body is 0.1mm-3.5mm.

Alternatively, the tapered tip includes a point angle, the point angle being 105 ° to 170 °.

The utility model has the advantages that:

the utility model discloses a set up vice back knife face on the first back knife face of needle body, the main cutting edge sets up on vice back knife face, can improve the abrasive resistance of main cutting edge, has promoted the life of drill point, has practiced thrift the power consumption cost of cutter, has improved the machining efficiency of board.

Drawings

Fig. 1 is a schematic structural view of a needle body provided by the present invention at a viewing angle;

fig. 2 is a schematic view of the mechanism of the needle body provided by the present invention at another viewing angle.

In the figure:

1. a needle body; 11. a first relief surface; 111. a secondary relief surface; 1111. a main cutting edge; 12. a second relief surface; 13. a center of rotation; 14. a centerline; 15. a chisel edge; 16. a main chip groove; 17. and an auxiliary chip groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1-2, the present embodiment provides a PCB drill point, which includes a needle handle (not shown in the drawings) and a needle body 1, wherein the needle body 1 is disposed at one end of the needle handle, a tapered tip portion is disposed at one end of the needle body 1 away from the needle handle, the tapered tip portion includes a first flank 11 and a second flank 12, the two first flanks 11 are disposed in a central symmetry manner along a rotation center 13 of the needle body 1, the two second flanks 12 are disposed in a central symmetry manner along the rotation center 13 of the needle body 1, the first flank 11 and the second flank 12 intersect to form a central line 14 and a cross edge 15, a secondary flank 111 is disposed on the first flank 11, a spirally extending primary flute 16 is symmetrically disposed on the needle body 1, and a primary cutting edge 1111 is formed at an intersection of the primary flute 16 and the secondary flank 111.

This embodiment sets up vice flank 111 on needle body 1's first flank 11, and main cutting edge 1111 sets up on vice flank 111, can improve main cutting edge 1111's abrasive resistance, has promoted the life of drill point, has practiced thrift the cost, does not need frequently to change the drill point, has improved the machining efficiency of board.

Alternatively, the width of the minor flank 111 gradually increases along the intersection point of the major cutting edge 1111 and the chisel edge 15 in a direction away from the rotation center 13 of the needle body 1, and the wedge angle of any point on the major cutting edge 1111 can be ensured to be equal.

Alternatively, the minor flank surface 111 is a flat surface or a curved surface, and when the minor flank surface 111 is a curved surface, the curved surface is curved in a direction toward the needle shaft. In this embodiment, the secondary flank 111 is preferably a curved surface, and the arrangement of the secondary flank 111 can make the rake angles on the main cutting edge 1111 equal or similar, so that the wear of the main cutting edge 1111 is more uniform, and the service life of the drill point is prolonged. In other embodiments, when the secondary flank 111 is a plane, the wear of the main cutting edge 1111 on the secondary flank 111 can be more balanced, and the service life of the PCB drill point can be prolonged.

Optionally, the distance between the two main flutes 16 gradually increases along the direction from the tapered tip to the needle shank, so that the strength and toughness of the drill needle are improved, and the needle breakage is prevented.

Optionally, the helix angle of the primary flutes 16 is 30 ° to 55 °, and in the present embodiment the helix angle of the primary flutes 16 is preferably 45 °.

Optionally, a side cutter structure is further arranged on the pin body 1 and comprises an auxiliary chip groove 17, the spiral angle of the auxiliary chip groove 17 is the same as that of the main chip groove 16, the friction area between the pin body 1 and the hole wall is reduced due to the arrangement of the auxiliary chip groove 17, the temperature in the processing process of the PCB drill point is reduced, and the processed hole wall is smoother.

Optionally, the needle body 1 and the needle handle are both made of hard alloy materials, and the hard alloy has the excellent performances of high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, so that the service life of the PCB drill point is further prolonged.

Optionally, the diameter of the needle body 1 is 0.1mm-3.5mm, and in this embodiment, the diameter of the needle body 1 is preferably 0.25mm.

Optionally, the tapered tip comprises a point angle, the angle of the point angle being 105 ° to 170 °, with the angle of the point angle preferably being 130 ° in this embodiment.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. The utility model provides a PCB drill point, includes needle handle and needle body (1), and needle body (1) sets up the one end of needle handle, needle body (1) is kept away from the one end of needle handle is provided with toper point portion, its characterized in that, toper point portion includes first back knife face (11) and second back knife face (12), two first back knife face (11) are followed rotation center (13) of needle body (1) are central symmetry and set up, two second back knife face (12) are followed rotation center (13) of needle body (1) are central symmetry and set up, first back knife face (11) with second back knife face (12) intersect and form central line (14) and cross cutting edge (15), be provided with vice back knife face (111) on first back knife face (11), the symmetry is provided with main chip groove (16) that the spiral extends on needle body (1), main chip groove (16) with the crossing department of vice back knife face (111) forms main cutting edge (1111).

2. The PCB drill point according to claim 1, characterized in that the width of the minor flank (111) gradually increases away from the center of rotation (13) of the needle body (1) along the intersection of the main cutting edge (1111) and the chisel edge (15).

3. The PCB drill point of claim 1, wherein the minor relief surface (111) is planar or curved, the curved surface being curved towards the direction of the pin shank.

4. The PCB drill point according to claim 1, characterized in that the distance between two primary flutes (16) increases gradually in the direction of the needle shank along the tapered tip.

5. The PCB drill point according to claim 1, wherein the angle of the helix angle of the primary flutes (16) is 30 ° -55 °.

6. The PCB drill point according to claim 5, characterized in that an edge cutter structure is further arranged on the needle body (1), the edge cutter structure comprises a secondary chip groove (17), and the secondary chip groove (17) has the same spiral angle with the primary chip groove (16).

7. The PCB drill point according to any of claims 1-6, characterized in that the needle body (1) and the needle shank are both made of cemented carbide material.

8. The PCB drill point according to any of claims 1-6, characterized in that the diameter of the needle body (1) is 0.1-3.5 mm.

9. The PCB drill point of any of claims 1-6, wherein the tapered tip comprises a point angle, the point angle being 105 ° -170 °.

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