CN210046878U

CN210046878U - Drill bit

Info

Publication number: CN210046878U
Application number: CN201920290606.1U
Authority: CN
Inventors: 张盼到; 钟明云
Original assignee: Chongqing Liangjiang Lian Electronics Co Ltd
Current assignee: Chongqing Liangjiang Lian Electronics Co Ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2020-02-11
Anticipated expiration: 2029-03-06

Abstract

The utility model provides a drill bit, tool bit and cutter arbor including coaxial coupling, a serial communication port, the tool bit includes coaxial and the drilling portion that connects gradually, first chamfer portion, truing portion and second chamfer portion, second chamfer portion with the cutter arbor is connected, the diameter of truing portion is less than the diameter of drilling portion, drilling portion first chamfer portion truing portion reaches equal plating sand on the surface of second chamfer portion is handled, first chamfer portion with the chamfer opposite direction of second chamfer portion. The utility model provides a drill bit can once only process out the drill way chamfer at micropore both ends, need not to carry out reverse side chamfer processing with glass is reversed, does not have the inclined to one side phenomenon of chamfer carving, and has improved production efficiency greatly.

Description

Drill bit

Technical Field

The utility model relates to a glass processing technology field, in particular to drill bit.

Background

With the rapid development of electronic and touch technologies, touch screens have become popular, and touch screens are also called touch display panels or touch screens, which are input/output devices formed by combining sensing technologies and display technologies and are commonly used in electronic devices.

The touch screen generally includes a cover glass, a touch module and a display module, which are stacked in sequence, and the cover glass generally includes 2D glass, 2.5D glass and 3D glass. In the production of cover glass, it is often necessary to micro-pore the glass.

Among the prior art, the micropore processing drill bit that uses at present needs the secondary chamfer, can't once process out the drill way chamfer at through-hole (micropore) both ends promptly, needs carry out the processing of reverse side chamfer after the upset of cover plate glass, and the chamfer carving is inclined to one side when this can cause secondary reverse side chamfer. In addition, the diameter of the micropores on the cover plate glass is smaller and smaller at present, and the micropore processing drill bit used at present cannot meet the processing requirement.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a drill bit to solve current drill bit and need the technical problem of secondary chamfer.

According to the utility model discloses among the embodiment a drill bit, tool bit and cutter arbor including coaxial coupling, the tool bit includes coaxial and connected gradually punching portion, first chamfer portion, finishing portion and second chamfer portion, second chamfer portion with the cutter arbor is connected, the diameter of finishing portion is less than the diameter of punching portion, punching portion first chamfer portion finishing portion reaches the equal plating sand on the surface of second chamfer portion is handled, first chamfer portion with the chamfer opposite direction of second chamfer portion.

Above-mentioned drill bit, add man-hour, process out the micropore with the portion of punching on glass earlier, then the drill bit continues down, and make the truing portion paste this micropore inner wall and rotate, in order to carry out the truing to the micropore inner wall, because the both ends of truing portion all are equipped with chamfer portion, at truing pivoted in-process, the chamfer portion at both ends just pastes the drill way edge rotation at this micropore both ends, thereby the drill way chamfer at micropore both ends is once only processed out, need not to carry out reverse side chamfer processing with glass, there is not the inclined phenomenon of chamfer carving, and improved production efficiency greatly.

Further, the diameter of the punching part is 0.72mm, and the diameter of the finishing part is 0.48 mm.

Further, the chamfer angles of the first chamfer and the second chamfer are equal.

Furthermore, the finishing part penetrates through the second chamfer part and extends to the inside of the cutter bar, and is in threaded connection with the cutter bar, and a detachable anti-rotation limiting structure is arranged between the finishing part and the cutter bar.

Furthermore, prevent changeing limit structure includes the fixed plate and locates the gag lever post of fixed plate one side, fixed plate detachable is fixed in on the terminal surface of cutter arbor, the gag lever post is deepened inside the cutter arbor to with finishing portion joint, in order to restrict finishing portion rotates.

Furthermore, the cross section of the limiting rod is D-shaped, the tail end of the finishing part is provided with a clamping hole matched with the limiting rod, and the limiting rod extends into and is clamped in the clamping hole.

Furthermore, the diameter of the part of the finishing part extending into the cutter bar is larger than that of the exposed part of the finishing part.

Furthermore, the fixed plate is detachably connected with the cutter bar through a plurality of bolts.

Furthermore, a plurality of waist-shaped holes are formed in the fixing plate, a plurality of threaded holes are formed in the end face of the tail end of the cutter bar, and the bolts penetrate through the waist-shaped holes and the threaded holes.

Drawings

Fig. 1 is a schematic structural view of a drill according to a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a drill according to a second embodiment of the present invention;

fig. 3 is a schematic perspective view of an anti-rotation limiting structure according to a second embodiment of the present invention;

fig. 4 is a schematic top view of a drill according to a second embodiment of the present invention.

Description of the main element symbols:

the following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a drill according to a first embodiment of the present invention includes a bit 10 and a tool bar 20 coaxially connected to each other.

The cutter head 10 comprises a punching part 11, a first chamfering part 12, a finishing part 13 and a second chamfering part 14 which are coaxial and connected in sequence, the second chamfering part 14 is connected with the cutter bar 20, the diameter of the finishing part 13 is smaller than that of the punching part 11, and the first chamfering part 12 and the second chamfering part 14 are opposite in chamfering direction and equal in chamfering angle. The outer surfaces of the punching portion 11, the first chamfered portion 12, the finishing portion 13, and the second chamfered portion 14 are each subjected to a sand plating process to form a hole by a rotary grinding.

Specifically, the diameter of the punching part is 0.72mm, the diameter of the finishing part is 0.48mm, and in the actual processing, because the diameter of the punching part is 0.72mm and the swing range of the cutter is generally within 0.05 in the processing, the diameter of the micropore processed by the punching part does not exceed 0.8mm, and the processing requirement of the current smaller glass micropore can be met.

When the drill bit is processed, the cutter bar 20 of the drill bit is firstly arranged on a cutter holder of a high-precision numerical control machine tool (the precision is within 0.005 MM) and locked, then the locked drill bit is corrected by a dial indicator, the swing range of the cutter is ensured to be within 0.05, so that the maximum diameter of the cutter during rotation can not exceed 0.8MM, finally, the drill bit is controlled by a numerical control program to move downwards, so that micropores are processed on cover plate glass in a grinding mode, then the drill bit moves downwards continuously, the fine trimming portion 13 rotates along the inner wall of each micropore, so that the inner wall of each micropore is subjected to fine trimming, chamfering portions are arranged at two ends of the fine trimming portion 13, and in the process of fine trimming rotation, the chamfering portions at two ends just rotate along the edges of orifices at two ends of each micropore, and orifice chamfers at two ends of each micropore are processed at one time.

To sum up, drill bit in the middle of this embodiment can once only process out the drill way chamfer at micropore both ends, need not to carry out reverse side chamfer processing with glass in reverse, does not have the inclined to one side phenomenon of chamfer carving, and has improved production efficiency greatly.

Referring to fig. 2 to 4, a drill according to a second embodiment of the present invention is shown, which is different from the drill according to the first embodiment in that:

the finishing part 13 penetrates through the second chamfer part 14 and extends to the inside of the cutter bar 20, and is in threaded connection with the cutter bar 20, a screw hole is correspondingly formed in the inside of the cutter bar 20, and a detachable anti-rotation limiting structure 30 is arranged between the finishing part 13 and the cutter bar 20.

Specifically, the anti-rotation limiting structure 30 includes a fixing plate 31 and a limiting rod 32 disposed on one side of the fixing plate 31, the fixing plate 31 is detachably fixed on the end surface of the end of the cutter bar 20, and the limiting rod 32 extends into the interior of the cutter bar 20 and is clamped with the finishing part 13 to limit the rotation of the finishing part 13.

The cross section of the limiting rod 32 is in a D shape, the tail end of the finishing part 13 is provided with a clamping hole 131 matched with the limiting rod, and the limiting rod 32 extends into and is clamped in the clamping hole 131. In other embodiments, an O-shape, a square shape, a Z-shape, etc. capable of limiting relative rotation may also be used.

Preferably, the diameter of the portion of the finishing part 13 extending into the interior of the tool holder 20 is larger than the diameter of the exposed portion thereof, i.e., the diameter of the portion extending into the interior of the tool holder 20 is expanded, so as to facilitate the processing of surface threads and the opening of internal clamping holes.

Specifically, the fixing plate 31 is detachably connected to the tool bar 20 by a plurality of bolts 33. The fixing plate 31 is provided with a plurality of waist-shaped holes 311, the end face of the tail end of the cutter bar 20 is provided with a plurality of threaded holes, and the bolts 33 penetrate through the waist-shaped holes 311 and the threaded holes. The slotted holes are designed so that the assembly requirements of the bolt can still be met after the fixing plate 31 rotates relative to the cutter bar 20.

It will be understood that, in order to machine the chamfer of the hole at the two ends of the micro hole at one time, the length of the finishing part 13 needs to be longer than or equal to the depth of the processed micro hole, preferably equal to the depth of the processed micro hole, so that the applicable range of the drill is limited if the length of the finishing part 13 is fixed. Therefore, in the embodiment, the length adjustment of the finishing part 13 is realized, the adjusting process is that the anti-rotation limiting structure 30 is firstly detached, then the cutter bar 20 is rotated, and the length of the finishing part 13 is naturally extended or shortened, so that the application range of the drill bit is greatly improved. After adjustment, the direction of the D-shaped clamping hole is aligned, and the anti-rotation limiting structure 30 is installed again, so that the cutter bar 20 and the cutter head 10 are fixed into a whole.

It should be noted that the device provided by the second embodiment of the present invention, which implements the same principle and produces some technical effects as the first embodiment, can refer to the corresponding contents in the first embodiment for the sake of brief description, where this embodiment is not mentioned.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a drill bit, includes coaxial coupling's tool bit and cutter arbor, its characterized in that, the tool bit includes coaxial and the drilling portion, first chamfer portion, truing portion and the second chamfer portion that connect gradually, the second chamfer portion with the cutter arbor is connected, the diameter of truing portion is less than the diameter of drilling portion, drilling portion first chamfer portion truing portion reaches equal plating sand on the surface of second chamfer portion is handled, first chamfer portion with the chamfer opposite direction of second chamfer portion.

2. The drill bit of claim 1, wherein the perforated portion has a diameter of 0.72mm and the finishing portion has a diameter of 0.48 mm.

3. The drill bit of claim 1, wherein the chamfer angles of the first chamfer and the second chamfer are equal.

4. The drill bit as claimed in claim 1, wherein the finishing part extends into the interior of the cutter bar through the second chamfer part and is screwed with the cutter bar, and a detachable anti-rotation limiting structure is arranged between the finishing part and the cutter bar.

5. The drill bit according to claim 4, wherein the anti-rotation limiting structure comprises a fixing plate and a limiting rod arranged on one side of the fixing plate, the fixing plate is detachably fixed on the end surface of the end of the cutter bar, and the limiting rod extends into the cutter bar and is clamped with the finishing part to limit the rotation of the finishing part.

6. The drill bit as claimed in claim 5, wherein the cross section of the limiting rod is D-shaped, the end of the finishing part is provided with a clamping hole matched with the limiting rod, and the limiting rod extends into and is clamped in the clamping hole.

7. A drill bit according to claim 5 or 6, characterized in that the finishing portion has a larger diameter in the region extending into the interior of the shank than in the region where it is exposed.

8. The drill bit of claim 5, wherein the retaining plate is removably attached to the holder by a plurality of bolts.

9. The drill bit as claimed in claim 8, wherein the fixing plate is provided with a plurality of waist-shaped holes, the end surface of the end of the cutter bar is provided with a plurality of threaded holes, and the bolts are inserted into the waist-shaped holes and the threaded holes.