CN217160125U

CN217160125U - Drilling and milling integrated cutter

Info

Publication number: CN217160125U
Application number: CN202123002011.8U
Authority: CN
Inventors: 刘宇; 陈迪法; 杨肖; 王颖康; 唐晋颖; 韦利娟
Original assignee: Guangdong Dingtai Hi Tech Co ltd
Current assignee: Guangdong Dingtai Hi Tech Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-08-09
Anticipated expiration: 2031-12-02

Abstract

The utility model belongs to the technical field of cutters, and discloses a drilling and milling integrated cutter which comprises a cutter handle and a cutter body which are coaxially arranged, wherein the cutter body comprises a cutter part which spirally extends around the axis of the cutter body, the cutter part is provided with a first surface and a second surface which spirally extend around the axis of the cutter body, the cutter part comprises a first cutting edge and a second cutting edge, the first cutting edge is formed at the intersection of the end surface of one end of the cutter part, which is far away from the cutter handle, and the first surface, the first cutting edge is arc-shaped, and is bent towards the inner side of the end surface of one end of the knife part far away from the knife handle, the second knife edge is formed at the intersection of the first surface and the second surface, the included angle between one end of the first knife edge close to the second surface and the second surface is smaller, the cutting capability of the second knife edge is increased, so that the redundant material on the blank can be completely cut, and the dimensional accuracy of the slotted hole on the printed circuit board can meet the requirement.

Description

Drilling and milling integrated cutter

Technical Field

The utility model relates to the technical field of cutters, especially, relate to a brill mills integral type cutter.

Background

With the change of the requirement of the printed circuit board, the hardness of the material required for manufacturing the printed circuit board is increased, the processing difficulty of the slotted hole on the printed circuit board is increased, and the requirement of the subsequent assembly process on the dimensional accuracy of the slotted hole on the printed circuit board is increased.

At present, when a slotted hole is machined in a printed circuit board, a drilling and milling integrated cutter is usually adopted, the drilling and milling integrated cutter in the prior art comprises a cutter handle and a cutter body which are coaxially arranged, the cutter body comprises a cutter portion spirally extending around the axis of the cutter body, an end blade is arranged at one end, far away from the cutter handle, of the cutter portion, the cutter body further comprises a side blade portion, the side blade portion spirally extends around the axis of the cutter body and is arranged on the outer peripheral edge of the cutter portion, a side blade is formed on the side blade portion and spirally extends around the axis of the cutter body, the side blade is intersected with the blade tip of the end blade, and redundant materials on a blank are cut off by the drilling and milling integrated cutter through the end blade and the side blade to obtain the slotted hole in a specified shape.

In the prior art, the end blades are arranged to be straight lines, so that the cutting capability of the side blades is low, but a printed circuit board is often required to be provided with a plurality of slotted holes with irregular shapes, and in the process of machining the slotted holes with irregular shapes, when a drilling and milling integrated cutter is used for machining the corner positions of the slotted holes, redundant materials on a blank cannot be completely cut due to the low cutting capability of the side blades, so that the dimensional accuracy of the slotted holes on the manufactured printed circuit board cannot meet the requirement.

Therefore, the above problems need to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bore and mill integral type cutter to solve the problem that the dimensional accuracy of the slotted hole on the printed circuit board of manufacturing is unsatisfied to require.

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

the utility model provides a bore and mill integral type cutter, bore and mill integral type cutter includes the handle of a knife and the cutter body of coaxial setting, the cutter body includes the sword portion of extending around its axis spiral, sword portion has around the first surface and the second surface of the axis spiral extension of cutter body, sword portion includes:

the first cutting edge is formed at the intersection of the end face of one end, far away from the cutter handle, of the cutter part and the first surface, is arc-shaped and is bent towards the inner side of the end face of one end, far away from the cutter handle, of the cutter part; and

a second blade edge formed at an intersection of the first surface and the second surface.

Preferably, the knife body comprises a pair of the knife parts, one end of each pair of the knife parts, which is far away from the knife handle, is of a centrosymmetric structure, and included angles between end faces of the pair of the knife parts, which are far away from the end of the knife handle, and the axis of the knife body are acute angles.

Preferably, the cutter body is provided with a first edge formed at an intersection of end surfaces of the pair of the cutter portions at ends far from the cutter holder, and the end surfaces of the pair of the cutter portions at ends far from the cutter holder are centrosymmetric with respect to a midpoint of the first edge.

Preferably, the included angle between the end faces of the pair of knife parts far away from one end of the knife handle ranges from 128 degrees to 132 degrees.

Preferably, the cutter body is provided with a chip discharge groove extending spirally around an axis thereof, and the chip discharge groove is formed between the pair of cutter portions.

Preferably, a chip groove is formed in one end, away from the handle, of any one of the knife parts, and the chip groove is located on one side, away from the first cutting edge, of the knife part and communicated between the end face, away from one end of the handle, of the knife part and the chip groove.

Preferably, the groove wall of the chip pocket has a second edge, the second edge is formed at the intersection of the groove wall of the chip pocket and the second surface, and the included angle between the plane perpendicular to the axis of the cutter body and the second edge ranges from 25 degrees to 30 degrees.

Preferably, the chip groove extends to one end of the other blade part far away from the handle, and a groove wall of the chip groove intersects with an end face of the other end of the blade part far away from the handle.

Preferably, the helix angle of the blade portion is selected in the range 25 ° to 40 °.

Preferably, the tool body is made of high speed tool steel or cemented carbide material.

The utility model has the advantages that: the utility model discloses in, first cutting edge is the arc and keeps away from the inboard bending of the terminal surface of the one end of handle of a knife towards sword portion for the one end that first cutting edge is close to the second surface is less with the contained angle on second surface, has increased the cutting ability of second cutting edge, so that unnecessary material can be cut by complete cutting on the blank, and then makes the size precision of the slotted hole on the printed circuit board of manufacturing satisfy the requirement.

Drawings

Fig. 1 is a front view of a drilling and milling integrated tool in an embodiment of the present invention;

fig. 2 is a top view of the drilling and milling integrated tool in the embodiment of the present invention.

In the figure:

1. a knife handle;

21. a knife section; 211. a first surface; 212. a second surface; 213. a first blade; 214. a second blade; 215. a chip pocket; 2151. a second edge; 22. a first edge; 23. a 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 disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely 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", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular 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.

Referring to fig. 1 and 2, the drilling and milling integrated tool includes a tool shank 1 and a tool body coaxially disposed, the tool body includes a cutting portion 21 spirally extending around an axis of the tool body, compared with the prior art, the cutting portion 21 in the present embodiment has a first surface 211 and a second surface 212 spirally extending around the axis of the tool body, the cutting portion 21 includes a first cutting edge 213 and a second cutting edge 214, the first cutting edge 213 is formed at an intersection of an end surface of the cutting portion 21 far from one end of the tool shank 1 and the first surface 211, the first cutting edge 213 is arc-shaped and is bent toward an inner side of the end surface of the cutting portion 21 far from one end of the tool shank 1, and the second cutting edge 214 is formed at an intersection of the first surface 211 and the second surface 212.

In this embodiment, the first blade 213 is arc-shaped and bent toward the inner side of the end surface of the end of the blade portion 21 away from the handle 1, so that the included angle between the end of the first blade 213 close to the second surface 212 and the second surface 212 is smaller, and the cutting capability of the second blade 214 is increased, so that the excess material on the blank can be completely cut, and the dimensional accuracy of the slot on the manufactured printed circuit board can meet the requirement.

Further, the cutter body in the embodiment is made of high-speed tool steel or hard alloy materials, so that the strength of the drilling and milling integrated cutter meets the use requirement.

Preferably, the cutter body in the embodiment includes a pair of cutter portions 21, one end of each of the pair of cutter portions 21 away from the cutter handle 1 is a central symmetrical structure, and an included angle between an end surface of one end of each of the pair of cutter portions 21 away from the cutter handle 1 and an axis of the cutter body is an acute angle, and a drill point can be formed on the end surface of one end of each of the pair of cutter portions 21 away from the cutter handle 1, so as to machine a slot hole in a blank, meanwhile, since the drilling and milling integrated cutter in the embodiment is provided with a pair of first cutting edges 213 and a pair of second cutting edges 214, that is, the embodiment can further improve the cutting capability of the drilling and milling integrated cutter by increasing the number of the cutting edges.

In the present embodiment, the included angle between the end faces of the pair of blade portions 21 at the ends far from the shank 1 is preferably in the range of 128 ° to 132 °, i.e., the angle of the drill tip is preferably 128 ° to 132 °, so that it is easier to machine the slot in the blank.

Further, in the present embodiment, the cutter body is provided with the first edge 22, the first edge 22 is formed at an intersection of end surfaces of the ends of the pair of cutter portions 21 far away from the cutter handle 1, the end surfaces of the ends of the pair of cutter portions 21 far away from the cutter handle 1 are centrosymmetric with respect to a midpoint of the first edge 22, and compared with the intersection of end surfaces of the ends of the pair of cutter portions 21 far away from the cutter handle 1 at a point, the strength of the cutter body of the drilling and milling integrated cutter in the present embodiment is higher, so as to further avoid a cutter breakage phenomenon occurring in the process of machining a slotted hole with an irregular shape.

In order to ensure that the processing process can be normally carried out, the generated scraps need to be removed in real time in the processing process, so that the cutter body in the embodiment is provided with the scrap discharge groove 23 spirally extending around the axis of the cutter body, the scrap discharge groove 23 is formed between the pair of cutter parts 21, and the scraps generated in the processing process of the slotted hole can be discharged by the scrap discharge groove 23.

Because most of blanks for manufacturing the printed circuit board in the prior art are aluminum substrates or copper substrates, aluminum scraps and copper scraps are easy to adhere to the cutter body, that is, the difficulty in discharging the aluminum scraps and the copper scraps is high, in order to further discharge the aluminum scraps or the copper scraps generated in the process of machining the slotted holes, in this embodiment, a chip containing groove 215 is formed in one end, away from the cutter handle 1, of any one cutter portion 21, the chip containing groove 215 is located on one side, away from the first cutting edge 213 of the cutter portion 21, and is communicated between the end face, away from the cutter handle 1, of the cutter portion 21 and the chip discharging groove 23, two chip discharging grooves 23 are formed in the cutter body in this embodiment, and the aluminum scraps or the copper scraps generated by cutting the first cutting edge 213 of any one cutter portion 21 can be directly discharged from one of the two chip discharging grooves 23, and can be indirectly discharged into the other chip discharging groove 23 through the chip containing groove 215.

Further, in the present embodiment, the chip groove 215 extends to one end of the other blade portion 21 away from the handle 1, a groove wall of the chip groove 215 intersects with an end surface of the other blade portion 21 away from the handle 1, aluminum chips or copper chips generated by the first cutting edge 213 of one of the pair of blade portions 21 can be temporarily accommodated in the chip groove 215 of the other blade portion 21, and the aluminum chips or copper chips accommodated in the chip groove 215 can be gradually discharged along with the slot hole machining process, so as to further facilitate discharging the aluminum chips or copper chips generated in the slot hole machining process.

Referring to fig. 1 and 2, the groove wall of the chip pocket 215 has a second edge 2151, the second edge 2151 is formed at the intersection of the groove wall of the chip pocket 215 and the second surface 212, and the included angle between the plane perpendicular to the axis of the cutter body and the second edge 2151 is 25-30 ° to improve the chip removal capability of the drilling and milling integrated cutter.

Preferably, the helix angle of the cutting portion 21 in this embodiment is selected in the range of 25-40, the greater the helix angle, the stronger the cutting ability of the second cutting edge 214, but the weaker the chip removal ability of the chip removal groove 23.

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 or 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

1. A drilling and milling integrated tool comprising a coaxially arranged shank (1) and a body, the body comprising a cutting portion (21) extending helically around its axis, characterized in that the cutting portion (21) has a first surface (211) and a second surface (212) extending helically around the axis of the body, the cutting portion (21) comprising:

the first cutting edge (213) is formed at the intersection of the end surface of one end, away from the cutter handle (1), of the cutter part (21) and the first surface (211), and the first cutting edge (213) is arc-shaped and is bent towards the inner side of the end surface of one end, away from the cutter handle (1), of the cutter part (21); and

a second cutting edge (214) formed at the intersection of the first surface (211) and the second surface (212).

2. The integrated drilling and milling cutter as claimed in claim 1, wherein the cutter body comprises a pair of the cutter portions (21), one ends of the pair of the cutter portions (21) far away from the cutter handle (1) are of a centrosymmetric structure, and the included angles between the end surfaces of the one ends of the pair of the cutter portions (21) far away from the cutter handle (1) and the axis of the cutter body are acute angles.

3. The integrated drilling and milling tool as set forth in claim 2, characterized in that the tool body is provided with a first rim (22), the first rim (22) being formed at an intersection of end surfaces of one ends of the pair of the tool parts (21) remote from the holder (1), the end surfaces of one ends of the pair of the tool parts (21) remote from the holder (1) being centrosymmetric with respect to a midpoint of the first rim (22).

4. The integrated drilling and milling tool as set forth in claim 2, characterized in that the included angle between the end faces of the pair of tool parts (21) at the ends thereof remote from the shank (1) ranges from 128 ° to 132 °.

5. The integrated drilling and milling tool as set forth in claim 1, wherein the tool body is provided with a chip groove (23) extending spirally about an axis thereof, the chip groove (23) being formed between a pair of the tool portions (21).

6. The integrated drilling and milling cutter as claimed in claim 5, wherein a chip groove (215) is formed in one end, away from the cutter handle (1), of any one of the cutter parts (21), the chip groove (215) is located on one side, away from the first cutting edge (213), of the cutter part (21) and communicated between the end face, away from one end of the cutter handle (1), of the cutter part (21) and the chip groove (23).

7. The integrated drilling and milling tool as set forth in claim 6, characterized in that a groove wall of the chip pocket (215) has a second rim (2151), the second rim (2151) being formed at an intersection of the groove wall of the chip pocket (215) and the second surface (212), and an included angle between a plane perpendicular to the axis of the tool body and the second rim (2151) ranges from 25 ° to 30 °.

8. The integrated drilling and milling tool as set forth in claim 6, characterized in that the chip flute (215) extends to the end of the other one of the cutting portions (21) remote from the shank (1), and the groove wall of the chip flute (215) intersects the end face of the other one of the cutting portions (21) remote from the shank (1).

9. The integrated drilling and milling tool as set forth in claim 1, characterized in that the helix angle of the cutting portion (21) is selected in the range of 25 ° -40 °.

10. The integrated drilling and milling tool of claim 1, wherein the tool body is made of high speed tool steel or cemented carbide material.