CN216263667U - Hard alloy steel micro-drill bit - Google Patents

Abstract

The utility model belongs to the field of drill bits, and particularly relates to a hard alloy steel micro drill bit, wherein the lower end of a micro drill bit part is provided with a central pipe, the side surface of the central pipe is provided with a first expansion joint, the side edge of the micro drill bit part is provided with a branch pipe, the branch pipe is communicated with the central pipe through the first expansion joint, the lower end of the micro drill bit part is provided with a second expansion joint, and the central pipe, the first expansion joint, the branch pipe and the second expansion joint are all internally provided with absorbent cotton; through the center tube that little bit portion lower extreme was seted up to and the bleeder of being connected through first expansion knot and center tube, and install the cotton that absorbs water at center tube, first expansion knot, bleeder and second expansion joint inside, when being convenient for little bit portion is to the work piece drilling, the cotton that absorbs water absorbs lubricating liquid, when little bit portion rotates at a high speed simultaneously, because the cotton inside lubricating liquid that absorbs water is outwards thrown away under the effect of centrifugal force, thereby lubricate when being convenient for little bit portion when driling to the work piece.

Description

Hard alloy steel micro-drill bit

Technical Field

The utility model belongs to the field of drill bits, and particularly relates to a hard alloy steel micro drill bit.

Background

Drill bits with a diameter of less than 3.175mm are commonly referred to as micro-drills, micro-drills for short. For the micro-drill to function efficiently in use, a number of factors must be considered: such as various elements of the drill bit, processing parameters, hole depth, installation integrity, workpiece structure and the like. The drilling machine is a machine tool which mainly uses a drill to machine a hole on a workpiece. Typically the drill bit is rotated into a primary motion and the drill bit is moved axially into a feed motion. When traditional little brill was used, the lubricated liquid is not convenient for lubricate the drill bit, the poor problem of drill bit stability simultaneously.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a hard alloy steel micro-drill.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a carbide steel microbit, includes brill stalk portion a little to and brill stalk portion lower extreme integrated into one piece's a little brill head portion a little, the center tube has been seted up to the lower extreme of boring head portion a little, the side surface of center tube is provided with first expansion knot, the side of boring head portion a little is provided with the bleeder, and the bleeder is through first expansion knot and center tube intercommunication, the lower extreme of boring head portion a little is provided with the second expansion joint, and the inside of center tube, first expansion knot, bleeder and second expansion joint all is provided with the cotton that absorbs water, the outside of boring head portion a little is provided with the voltage limiting subassembly.

As a preferred technical scheme of the hard alloy steel micro-drill bit, the pressure limiting assembly comprises a bearing arranged on the outer surface of the upper end of the micro-drill handle and a pressure limiting ring arranged outside the micro-drill head, and a telescopic structure is arranged between the bearing and the pressure limiting ring.

According to the preferable technical scheme, the telescopic structure comprises a sleeve, a first telescopic rod, a second telescopic rod, baffles and a compression spring, the baffles are welded at the upper end of the first telescopic rod and the lower end of the second telescopic rod and are arranged inside the sleeve, the compression spring is fixed between the two baffles, the lower end of the first telescopic rod is welded on the surface of the pressure limiting ring, and the upper end of the second telescopic rod is welded on the outer surface of the bearing.

As the preferable technical scheme of the hard alloy steel micro-drill, the second telescopic rod is of an L-shaped structure.

As a preferred technical scheme of the hard alloy steel micro drill bit, twelve sleeves, the first telescopic rods and the second telescopic rods are arranged.

As a preferred technical scheme of the hard alloy steel micro drill bit, an included angle between the branch pipe and the central pipe is 45 degrees.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the center tube that little bit portion lower extreme was seted up, and the bleeder that is connected with the center tube through first expansion knot, and install at the center tube, first expansion knot, the cotton absorbs water inside bleeder and the second expansion joint, when being convenient for little bit portion is to the work piece drilling, the cotton absorbs lubricating liquid that absorbs water, when little bit portion rotates at a high speed simultaneously, because cotton inside lubricating liquid that absorbs water outwards throws away under the effect of centrifugal force, thereby be convenient for little bit portion lubricates when holing the work piece, make the inside negative pressure that forms of center tube after cotton inside lubricating liquid throws away of absorbing water simultaneously, thereby increase the convenience that cotton absorbs lubricating liquid that absorbs water, through the outside pressure limiting component that sets up of little bit portion, be convenient for little bit portion supports through the pressure limiting component when holing the work piece, thereby the equilibrium degree of drilling has been increased.

2. Through by the bearing, the voltage limiting subassembly that the extending structure who sets up between voltage limiting ring and the bearing and the voltage limiting ring constitutes, the bearing is installed in the outside of boring the stalk portion a little simultaneously, the voltage limiting ring sets up the outside at boring the head portion a little, and extending structure sets up between bearing and voltage limiting ring, extending structure includes the sleeve pipe simultaneously, first telescopic link, the second telescopic link, baffle and compression spring, and first telescopic link upper end and second telescopic link lower extreme welded baffle installation are in sheathed tube inside, compression spring fixes between two baffles simultaneously, be convenient for sheathed tube both ends slide at the tip of first telescopic link and second telescopic link.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a half-section of the present invention;

FIG. 3 is a schematic view of the structure of the micro drill bit of the present invention;

FIG. 4 is a schematic structural view of the casing, the first telescopic rod and the second telescopic rod of the present invention;

in the figure: 1. a micro-drill shank; 2. a micro-drill head; 3. a central tube; 4. a first expansion junction; 5. a branch pipe; 6. a second expansion joint; 7. absorbent cotton; 8. a bearing; 9. a pressure limiting ring; 10. a sleeve; 11. a first telescopic rod; 12. a second telescopic rod; 13. a baffle plate; 14. compressing the spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a carbide steel microbit, including boring stalk portion 1 a little, and bore 1 lower extreme integrated into one piece's little brill head portion 2 a little of boring stalk portion a little, center tube 3 has been seted up to the lower extreme of boring head portion 2 a little, the side surface of center tube 3 is provided with first expansion joint 4, the side of boring head portion 2 a little is provided with bleeder 5, and bleeder 5 communicates with 3 center tubes through first expansion joint 4, the lower extreme of boring head portion 2 a little is provided with second expansion joint 6, and center tube 3, first expansion joint 4, the inside of bleeder 5 and second expansion joint 6 all is provided with cotton 7 that absorbs water, the outside of boring head portion 2 a little is provided with the voltage limiting subassembly. In the embodiment, through a central pipe 3 arranged at the lower end of the micro drill head part 2 and a branch pipe 5 connected with the central pipe 3 through a first expansion joint 4, and the absorbent cotton 7 is arranged in the central tube 3, the first expansion joint 4, the branch tube 5 and the second expansion joint 6, so that when the micro-bit part 2 drills a workpiece, the absorbent cotton 7 absorbs lubricating liquid, and simultaneously when the micro-bit part 2 rotates at a high speed, because the lubricating liquid in the absorbent cotton 7 is thrown out under the action of centrifugal force, the micro drill bit part 2 can lubricate the workpiece during drilling, and simultaneously the lubricating liquid in the absorbent cotton 7 is thrown out to form negative pressure in the central tube 3, therefore, the convenience of the water absorption cotton 7 for absorbing lubricating liquid is improved, the micro drill head part 2 is convenient to support through the pressure limiting component when drilling a workpiece through the micro drill head part 2 through the pressure limiting component arranged outside the micro drill head part 2, and the balance degree of drilling is increased. Specifically, the pressure limiting assembly comprises a bearing 8 installed on the outer surface of the upper end of the micro-drill handle part 1, and a pressure limiting ring 9 arranged outside the micro-drill head part 2, a telescopic structure is arranged between the bearing 8 and the pressure limiting ring 9, the telescopic structure comprises a sleeve 10, a first telescopic rod 11, a second telescopic rod 12, baffles 13 and compression springs 14, the baffles 13 are welded to the upper end of the first telescopic rod 11 and the lower end of the second telescopic rod 12, the baffles 13 are installed inside the sleeve 10, the compression springs 14 are fixed between the two baffles 13, the lower end of the first telescopic rod 11 is welded to the surface of the pressure limiting ring 9, the upper end of the second telescopic rod 12 is welded to the outer surface of the bearing 8, the second telescopic rod 12 is of an L-shaped structure, the sleeve 10, the first telescopic rod 11 and the second telescopic rod 12 are both provided with twelve, and the included angle between the branch pipe 5 and the central pipe 3 is 45 degrees. In this embodiment, through the pressure limiting assembly that comprises bearing 8, pressure limiting ring 9 and the extending structure that sets up between bearing 8 and the pressure limiting ring 9, bearing 8 installs in the outside of boring handle portion 1 a little simultaneously, pressure limiting ring 9 sets up in the outside of boring head portion 2 a little, and extending structure sets up between bearing 8 and pressure limiting ring 9, extending structure includes sleeve pipe 10 simultaneously, first telescopic link 11, second telescopic link 12, baffle 13 and compression spring 14, and the inside at sleeve pipe 10 is installed to first telescopic link 11 upper end and second telescopic link 12 lower extreme welded baffle 13, compression spring 14 fixes between two baffles 13 simultaneously, be convenient for the both ends of sleeve pipe 10 slide at the tip of first telescopic link 11 and second telescopic link 12.

The working principle and the using process of the utility model are as follows: during the use, the upper end of little brill stalk portion 1 is fixed with the output of drilling machine, when little brill head portion 2 is to the work piece drilling, pressure limiting ring 9 at first contacts with the work piece, little brill head portion 2 cuts the work piece surface during drilling, little brill head portion 2 rotates in the inside of bearing 8 simultaneously, the lubricated liquid of absorption of the cotton 7 that absorbs water of bleeder 5 inside this moment is thrown away under the effect of centrifugal force, the back pressure reduces in 2 inside liquid entering bleeder 5 of little brill head portion simultaneously, thereby be convenient for little brill head portion 2 absorbs lubricated liquid through the bottom.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. 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 present invention.

Claims (6)

1. The utility model provides a carbide steel microbit, includes little drillstock portion (1) to and little drillstock portion (1) lower extreme integrated into one piece's little drillstock portion (2), its characterized in that: center tube (3) have been seted up to the lower extreme of little brill head portion (2), the side surface of center tube (3) is provided with first expansion joint (4), the side of little brill head portion (2) is provided with bleeder (5), and bleeder (5) are through first expansion joint (4) and center tube (3) intercommunication, the lower extreme of little brill head portion (2) is provided with second expansion joint (6), and the inside of center tube (3), first expansion joint (4), bleeder (5) and second expansion joint (6) all is provided with cotton (7) absorb water, the outside of little brill head portion (2) is provided with the voltage limiting subassembly.

2. The hard alloy steel micro-drill according to claim 1, characterized in that: the pressure limiting assembly comprises a bearing (8) arranged on the outer surface of the upper end of the micro-drill handle part (1) and a pressure limiting ring (9) arranged outside the micro-drill head part (2), and a telescopic structure is arranged between the bearing (8) and the pressure limiting ring (9).

3. The hard alloy steel micro-drill according to claim 2, characterized in that: the telescopic structure comprises a sleeve (10), a first telescopic rod (11), a second telescopic rod (12), a baffle (13) and a compression spring (14), wherein the baffle (13) is welded at the upper end of the first telescopic rod (11) and the lower end of the second telescopic rod (12), the baffle (13) is installed inside the sleeve (10), the compression spring (14) is fixed between the two baffles (13), the lower end of the first telescopic rod (11) is welded on the surface of the pressure limiting ring (9), and the upper end of the second telescopic rod (12) is welded on the outer surface of the bearing (8).

4. A hard alloy steel micro-bit according to claim 3, wherein: the second telescopic rod (12) is of an L-shaped structure.

5. A hard alloy steel micro-bit according to claim 3, wherein: twelve sleeves (10), twelve first telescopic rods (11) and twelve second telescopic rods (12) are arranged.

6. The hard alloy steel micro-drill according to claim 1, characterized in that: the included angle between the branch pipe (5) and the central pipe (3) is 45 degrees.

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