CN217617959U

CN217617959U - High-speed alloy stepped drill bit

Info

Publication number: CN217617959U
Application number: CN202221368993.4U
Authority: CN
Inventors: 丁浪
Original assignee: Changzhou Juren Precision Tools Co ltd
Current assignee: Changzhou Juren Precision Tools Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-10-21
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses a high-speed alloy ladder drill bit, include: the drill bit shaft rod, the stepped drill bit main body and the cooling flow channel assembly located inside the drill bit shaft rod and the stepped drill bit main body are fixedly installed on the top surface of the stepped drill bit main body, a drill bit portion is arranged at the bottom end of the stepped drill bit main body, and the cooling flow channel assembly comprises an inlet, an outlet, a guide outlet and a spiral flow channel, wherein the inlet and the outlet are located on the surface of the drill bit shaft rod and at the bottom end of the waste screw groove respectively, and the guide outlet and the spiral flow channel are located inside the drill bit shaft rod and the stepped drill bit main body respectively. The utility model discloses in, through setting up inner wall cooling flow channel structure, utilize cooling shower nozzle subtend introducing port to carry out the coolant liquid and spray and form coolant liquid or air current and coolant liquid mixed fluid in the high-speed rotation of drill bit at the inside centrifugation of spiral flow channel and derive to inside the ladder drill bit main part and through the export of leading, realize the cooling to ladder drill bit main part and drill bit portion, reduce drill bit operating temperature and improve life.

Description

High-speed alloy stepped drill bit

Technical Field

The utility model relates to a drill bit technical field specifically is a high-speed alloy ladder drill bit.

Background

A step drill is also called a step drill or a pagoda drill, in the industries of automobile processing, aerospace, sheet metal processing, electrical appliance installation and maintenance and the like, a plurality of thin metal plates need to be punched, one drill bit can replace a plurality of drill bits to be used, holes with different diameters can be processed according to needs, large holes can be processed at one time, and the drill bits do not need to be replaced, positioning holes do not need to be punched, and the like.

Step drill is when drilling, mainly cut the work piece through the tool bit top, because the drill bit can produce certain heat when drilling, can cause the influence to drilling, influence operating mass with rated load and work efficiency, and simultaneously, the atress that the step was bored is the drill bit that the step was bored, cause the damage easily, step drill passes through the chip groove and discharges the piece, if the discharge that the piece can not be very smooth and easy, then can lead to the downthehole wall of brill to appear the mar, current drill bit sets up two chip grooves usually, the chip groove is narrower, so the helix angle is smaller usually, the chip removal is slower, lead to the downthehole wall to appear the mar easily. In view of this, the present invention provides a high-speed alloy stepped drill bit, which is improved in view of the conventional problems, and aims to achieve the purposes of solving the problems and improving the practical value by the technology.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.

Therefore, the utility model discloses the technical scheme who adopts does: a high-speed alloy stepped drill bit, comprising: the drill bit shaft lever, the stepped drill bit main body and the cooling flow channel assembly located inside the drill bit shaft lever and the stepped drill bit main body are fixedly installed on the top surface of the stepped drill bit main body, a drill bit portion is arranged at the bottom end of the stepped drill bit main body, a waste screw withdrawing groove penetrating through a reaming milling step is formed in the surface of the stepped drill bit main body, the inner side of the waste screw withdrawing groove is of a smooth arc-shaped surface structure, the cooling flow channel assembly comprises an inlet, an outlet and a spiral flow channel, the inlet and the outlet are respectively located on the surface of the drill bit shaft lever, the bottom end of the waste screw withdrawing groove, the outlet and the spiral flow channel are respectively located inside the drill bit shaft lever and the stepped drill bit main body, one end of the outlet is communicated with the inlet, and the other end of the outlet is provided with a flow passing hole communicated with the top end of the direct flow channel.

The present invention may be further configured in a preferred embodiment as: the drill bit shaft rod and the stepped drill bit main body are of an integrally formed structure, and the drill bit shaft rod and the stepped drill bit main body are high-speed alloy steel components.

The present invention may be further configured in a preferred embodiment as: the edge of the drill bit part is of a cutting edge-shaped structure, the surface of the drill bit part is subjected to surface hardening treatment, the edge of the reaming milling step is provided with a cutting edge, the end part of the reaming milling step is provided with a milling edge positioned on the inner side of the waste screw withdrawing groove, and the milling edge is in a triangular cone shape.

The present invention may be further configured in a preferred embodiment as: the stepped drill bit body is of a conical structure, and the reaming milling steps are wound on the outer side of the stepped drill bit body in a spiral shape.

The present invention may be further configured in a preferred embodiment as: the waste withdrawing screw groove is in a spiral groove shape, and the section of the inner side of the waste withdrawing screw groove is in a semicircular shape.

The present invention may be further configured in a preferred embodiment as: the guide inlet is of an outward-expanding horn-shaped hole structure, the spiral flow channel is of a spiral flow guide liquid channel structure, and the upper end and the lower end of the spiral flow channel are respectively communicated with the guide inlet and the overflowing hole.

The present invention in a preferred embodiment can be further configured to: the guiding outlet is positioned on the surface of the bottom end of the waste screw groove, the straight flow channel is positioned on the axis of the stepped drill bit main body, and two ends of the straight flow channel are respectively communicated with the overflowing hole and the guiding outlet.

The utility model discloses the beneficial effect who gains does:

1. the utility model discloses in, through setting up inner wall cooling flow channel structure, utilize cooling shower nozzle subtend introducing port to carry out the coolant liquid and spray and form coolant liquid or air current and coolant liquid miscarriage fluid in the high-speed rotation of drill bit at the inside centrifugation of spiral flow channel and derive to ladder drill bit main part inside and through the export of leading, thereby form the negative pressure in introducing port department and continuously aspirate external air current and the cooling liquid and realize the cooling to ladder drill bit main part and drill bit portion, reduce drill bit operating temperature and improve life.

2. The utility model discloses in, through arranging the export in the bottom of moving back useless spiral shell groove with leading-out, admit air by the cooling runner subassembly and leading-in or the leading-in drilling of coolant liquid is inside and follow the sweeps by moving back useless spiral shell groove and discharge, and water liquid or air current effect are smooth and easy to be discharged with higher speed sweeps, avoid the excess of sweeps to pile up and lead to the fact wearing and tearing to moving back useless spiral shell inslot portion, further improve the protective effect of this drill bit.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is an overall isometric side view schematic of an embodiment of the present invention;

fig. 3 is a schematic bottom structure of an embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Reference numerals:

100. a drill shaft;

200. a stepped drill bit body; 210. drilling a head part; 220. reaming and milling steps; 230. removing the waste screw groove;

300. a cooling flow channel assembly; 310. an inlet port; 320. a lead-out port; 330. a spiral flow channel; 340. a straight flow channel; 331. and an overflowing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The high-speed alloy stepped drill bit provided by the invention in some embodiments is described below with reference to the accompanying drawings.

Referring to fig. 1-4, the present invention provides a high-speed alloy stepped drill bit, comprising: the drill bit shaft rod 100, the stepped drill bit body 200 and the cooling flow channel assembly 300 located inside the drill bit shaft rod 100 and the stepped drill bit body 200, wherein the drill bit shaft rod 100 is fixedly installed on the top surface of the stepped drill bit body 200, the drill bit part 210 is arranged at the bottom end of the stepped drill bit body 200, the reaming milling step 220 is arranged on the surface of the stepped drill bit body 200, the waste screw withdrawing groove 230 penetrating through the reaming milling step 220 is formed on the surface of the stepped drill bit body 200, the inner side of the waste screw withdrawing groove 230 is of a smooth arc surface structure, the cooling flow channel assembly 300 comprises an inlet 310 and an outlet 320 which are respectively located at the bottom ends of the drill bit shaft rod 100 and the waste screw withdrawing groove 230, and an outlet 320 and a spiral flow channel 330 which are respectively located inside the drill bit shaft rod 100 and the stepped drill bit body 200, one end of the outlet 320 is communicated with the inlet 310, and the other end of the outlet is provided with an overflowing hole 331 communicated with the top end of the straight flow channel 340.

In this embodiment, the bit shaft 100 and the stepped bit body 200 are integrally formed, and the bit shaft 100 and the stepped bit body 200 are high-speed alloy steel components, so that the structural rigidity and strength of the integrated high-speed alloy steel bit are improved, and the service life of the integrated high-speed alloy steel bit is prolonged.

In this embodiment, the edge of the drill portion 210 is a cutting edge-like structure, the surface of the drill portion 210 is surface-hardened, the edge of the reaming milling step 220 is provided with a cutting edge, and the end of the reaming milling step 220 is provided with a milling edge located inside the waste removing screw groove 230, and the milling edge is triangular cone-shaped.

Specifically, the cutting edge structures on the surfaces of the drill bit 210 and the reaming milling step 220 are used for drilling, reaming and milling, so that the holes on the surface of the workpiece can be formed at one time, and holes with various sizes can be machined

In this embodiment, the stepped drill bit body 200 has a conical structure, and the broaching milling step 220 is spirally wound on the outer side of the stepped drill bit body 200.

Specifically, a conical structure is adopted, the spiral reaming milling steps 220 form a drill bit surface stepped structure, one drill bit can replace a plurality of drill bits, and holes with different diameters can be machined according to requirements.

In this embodiment, the waste screw groove 230 has a spiral groove shape, and the inner cross section of the waste screw groove 230 is semicircular.

Specifically, the semicircular waste screw withdrawing groove 230 is utilized to increase the structural depth of the waste screw withdrawing groove 230, the waste withdrawing amount is improved, the friction contact between the scraps and the inner wall of the waste screw withdrawing groove 230 is reduced as much as possible, and the damage of scratches on the inner side of the waste screw withdrawing groove 230 is avoided.

In this embodiment, the inlet 310 is an outward flared trumpet hole structure, the spiral flow channel 330 is a spiral flow guide liquid channel structure, and the upper and lower ends of the spiral flow channel 330 are respectively communicated with the inlet 310 and the overflowing hole 331.

Specifically, during the operation of the drill, the level of the guide opening 310 where the cooling liquid nozzle of the drilling machine is located can be adjusted, and by means of the high-speed rotation of the drill, the gas flow and the liquid flow generate centrifugal force inside the spiral flow channel 330 and move downwards along the inner wall of the spiral flow channel 330 under the action of the centrifugal force, and the continuous operation of the drill forms a negative pressure area at the guide opening 310 to continuously introduce the liquid flow.

In this embodiment, the outlet 320 is located on the surface of the bottom end of the waste screw withdrawing groove 230, and the straight flow channel 340 is located on the axial line of the stepped drill body 200 and has two ends respectively communicated with the overflowing hole 331 and the outlet 320.

Specifically, the damage to the overall structure of the stepped drill bit body 200 is reduced as much as possible by using the straight flow channel 340 arranged on the axial line of the stepped drill bit body 200, and the gravity falling of the liquid flow is realized through the straight flow channel structure, so that the flow guiding rate of the liquid flow is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A high speed alloy stepped drill bit, comprising: the drill bit comprises a drill bit shaft rod (100), a stepped drill bit main body (200) and a cooling runner assembly (300) located inside the drill bit shaft rod (100) and the stepped drill bit main body (200), wherein the drill bit shaft rod (100) is fixedly installed on the top surface of the stepped drill bit main body (200), a drill bit part (210) is arranged at the bottom end of the stepped drill bit main body (200), a reaming milling step (220) is arranged on the surface of the stepped drill bit main body (200), a waste screw withdrawing groove (230) penetrating through the reaming milling step (220) is formed in the surface of the stepped drill bit main body (200), the inner side of the waste screw withdrawing groove (230) is of a smooth arc surface structure, the cooling runner assembly (300) comprises an inlet port (310) and an outlet port (320) which are respectively located at the bottom end of the drill bit shaft rod (100) and the waste screw withdrawing groove (230) and an outlet port (320) and a spiral runner (330) which are respectively located inside the drill bit shaft rod (100) and the stepped drill bit main body (200), one end of the outlet port (320) is communicated with the inlet port (310) and the other end of the straight runner (340) is provided with a through hole (331).

2. The high-speed alloy stepped drill bit according to claim 1, wherein the drill bit shaft (100) and the stepped drill bit body (200) are formed as a single-piece structure, and the drill bit shaft (100) and the stepped drill bit body (200) are high-speed alloy steel components.

3. The high-speed alloy stepped drill bit as claimed in claim 1, wherein the edge of the drill bit part (210) is of a cutting edge-shaped structure, the surface of the drill bit part (210) is subjected to surface hardening treatment, the edge of the reaming milling step (220) is provided with a cutting edge, the end part of the reaming milling step (220) is provided with a milling edge positioned on the inner side of the waste screw withdrawing groove (230), and the milling edge is of a triangular pyramid shape.

4. The high-speed alloy stepped drill bit according to claim 1, wherein the stepped drill bit body (200) is of a conical structure, and the reaming step (220) is spirally wound on the outer side of the stepped drill bit body (200).

5. The high-speed alloy stepped drill bit as claimed in claim 1, wherein the waste withdrawing screw groove (230) is in the shape of a spiral groove, and the inner side cross section of the waste withdrawing screw groove (230) is semicircular.

6. The high-speed alloy stepped drill bit as claimed in claim 1, wherein the inlet (310) is of an outward flared bell mouth structure, the spiral flow channel (330) is of a spiral flow guide liquid channel structure, and the upper end and the lower end of the spiral flow channel (330) are respectively communicated with the inlet (310) and the overflowing hole (331).

7. The high-speed alloy stepped drill bit according to claim 1, wherein the outlet (320) is located on the surface of the bottom end of the waste screw withdrawing groove (230), the straight flow channel (340) is located on the axial line of the stepped drill bit body (200) and both ends of the straight flow channel are respectively communicated with the overflowing hole (331) and the outlet (320).