CN217343726U

CN217343726U - Inner-cooling stepped drill bit

Info

Publication number: CN217343726U
Application number: CN202221382495.5U
Authority: CN
Inventors: 丁浪
Original assignee: Changzhou Juren Precision Tools Co ltd
Current assignee: Changzhou Juren Precision Tools Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-09-02
Anticipated expiration: 2032-06-06

Abstract

The utility model discloses an interior cold ladder drill bit, include: the driving shaft pole, drill bit main part and liquid stream pumping mechanism, liquid stream pumping mechanism fixed mounting is in the top surface of drill bit main part, driving shaft pole fixed mounting is in liquid stream pumping mechanism's top surface, the surperficial rotation of driving shaft pole has cup jointed the liquid lid of leading surely with the slip butt of drill bit main part top surface, liquid stream pumping mechanism is located the inside of leading the liquid lid surely, the surface of leading the liquid lid surely has seted up the coolant pipe, the surface of drill bit main part is equipped with the cutting rank sword and moves back the useless notch. The utility model discloses in, through setting up interior cold flow way structure, utilize liquid stream pumping mechanism to follow the water conservancy diversion pump sending that the drill bit main part rotates and carry out the coolant liquid, liquid stream pumping mechanism is deciding the inside relative rotation of drain lid and is cooling down the ladder drill bit comprehensively through leading-in each subchannel of sprue and by going out the escape of liquid guide, utilizes the liquid stream to take away drill bit main part work heat at the inside flow of drill bit main part, improves ladder drill bit's life.

Description

Inner-cooling stepped drill bit

Technical Field

The utility model relates to a ladder drill bit technical field specifically is an interior cold 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.

Because the drill bit can produce certain heat when drilling, can cause the influence to drilling, influence operating quality and work efficiency, current drill bit cooling is mainly cooled down through the mode that the coolant liquid outside sprayed, because the high-speed motion of drill bit, the coolant liquid is less with the drill bit contact, lead to cooling inefficiency, simultaneously, the outside is sprayed and is leaded to the cutting piece to receive rivers resistance to be difficult to derive the repeated long-pending and stay in drill bit retreat waste groove and hole, cause the damage easily, ladder on the market is bored and is just needed to change whole brill when the drill bit damages, cause extravagant increase in production cost, there are more defects.

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: an internally cooled stepped drill bit, comprising: the liquid flow pumping mechanism is fixedly installed on the top surface of the drill bit main body, the driving shaft rod is fixedly installed on the top surface of the liquid flow pumping mechanism, a fixed liquid guiding cover which is in sliding butt joint with the top surface of the drill bit main body is rotatably sleeved on the surface of the driving shaft rod, the liquid flow pumping mechanism is located inside the fixed liquid guiding cover, a cooling liquid pipe is arranged on the surface of the fixed liquid guiding cover, a cutting step edge and a waste removing groove opening are arranged on the surface of the drill bit main body, a main flow channel and a branch flow channel are arranged inside the drill bit main body, and a liquid outlet guide opening communicated with the branch flow channel is arranged on the inner side of the waste removing groove opening.

The present invention may be further configured in a preferred embodiment as: the liquid flow pumping mechanism comprises an impeller disc and a plurality of axial flow fan blades, wherein the axial flow fan blades are distributed in the circumferential direction and are uniformly distributed on the surface of the impeller disc at intervals, and a collecting hole is formed between the axial flow fan blades.

The present invention may be further configured in a preferred embodiment as: the bottom end of the liquid guide and guide cover is provided with a reinforcing column, the reinforcing column penetrates through the flow collecting hole and is fixedly connected with the surface of the drill bit main body, the upper end and the lower end of the axial flow fan blade are respectively welded and fixed with the bottom surface of the impeller disc and the top surface of the drill bit main body, and the bottom end of the driving shaft lever is welded and fixed with the top surface of the impeller disc.

The present invention may be further configured in a preferred embodiment as: the inner side of the fixed liquid guiding cover is provided with a dynamic seal sleeved on the surface of the driving shaft rod, the bottom surface of the fixed liquid guiding cover is provided with a dynamic seal ring mutually abutted with the top surface of the drill bit main body, and the end part of the cooling liquid pipe is fixedly connected with a liquid flow pumping structure.

The present invention may be further configured in a preferred embodiment as: the utility model discloses a drill bit, including drill bit main part, driving shaft pole, drill bit, cutting step sword, drive shaft pole and drill bit main part are high-speed alloy steel material component, the drill bit main part is the toper structure, and is a plurality of it is the echelonment to move back useless notch and arranges in the surface of drill bit main part, the tip of cutting step sword extends to and moves back useless notch surface, and the tip of cutting step sword is equipped with the cutting edge.

The present invention may be further configured in a preferred embodiment as: the section of the waste withdrawing notch is of a right-angled triangle structure, the inner side of the waste withdrawing notch is of a smooth surface structure, and the surface of the waste withdrawing notch is subjected to hardening treatment.

The present invention may be further configured in a preferred embodiment as: the sub-runners are spiral, one ends of the sub-runners are communicated with the inside of the main runner, the other ends of the sub-runners are communicated with the liquid outlet guide ports in a one-to-one correspondence mode, and the spiral turning directions of the sub-runners are opposite to the cutting directions of the waste discharge notches.

The utility model discloses the beneficial effect who gains does:

1. the utility model discloses in, through setting up interior cold flow way structure, utilize liquid stream pumping mechanism to follow the water conservancy diversion pump sending that the drill bit main part rotates and carry out the coolant liquid, liquid stream pumping mechanism is deciding the inside relative rotation of drain lid and is cooling down the ladder drill bit comprehensively through leading-in each subchannel of sprue and by going out the escape of liquid guide, utilizes the liquid stream to take away drill bit main part work heat at the inside flow of drill bit main part, improves ladder drill bit's life.

2. The utility model discloses in, lead the inside drill bit main part of following of liquid lid through liquid stream pumping mechanism and carry out synchronous rotation, lead the inside liquid stream of liquid lid and get into the sprue fast with higher speed by liquid stream pumping mechanism for the liquid stream flows, and the liquid stream distributes through the subchannel to move back inside the groove mouth that gives up, washes the sweeps, makes the sweeps derive fast, avoids the sweeps long-pending influence drilling process that stays.

Drawings

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

FIG. 2 is a schematic longitudinal sectional view of a drill bit body according to an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the liquid guiding and guiding cover according to an embodiment of the present invention;

FIG. 4 is a cross-sectional structural view of a drill bit body according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a liquid flow pumping mechanism according to an embodiment of the present invention.

Reference numerals:

100. a drive shaft; 110. a liquid guide cover; 120. a coolant tube;

200. a drill bit body; 210. cutting a step edge; 220. a waste removing notch; 230. a main flow channel; 221. a liquid outlet guide port; 231. a shunt channel;

300. a fluid flow pumping mechanism; 310. an impeller disc; 320. axial flow fan blades; 330. and a collecting 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 following describes an inner-cooling stepped drill bit provided by some embodiments of the present invention with reference to the accompanying drawings.

With reference to fig. 1-5, the present invention provides an inner-cooling stepped drill bit, including: the drill bit comprises a driving shaft rod 100, a drill bit main body 200 and a liquid flow pumping mechanism 300, wherein the liquid flow pumping mechanism 300 is fixedly installed on the top surface of the drill bit main body 200, the driving shaft rod 100 is fixedly installed on the top surface of the liquid flow pumping mechanism 300, a fixed guide liquid cover 110 which is in sliding abutting joint with the top surface of the drill bit main body 200 is rotatably sleeved on the surface of the driving shaft rod 100, the liquid flow pumping mechanism 300 is positioned inside the fixed guide liquid cover 110, a cooling liquid pipe 120 is arranged on the surface of the fixed guide liquid cover 110, a cutting step edge 210 and a waste discharge groove opening 220 are arranged on the surface of the drill bit main body 200, a main flow passage 230 and a branch flow passage 231 are arranged inside the drill bit main body 200, and a liquid discharge guide opening 221 communicated with the branch flow passage 231 is arranged on the inner side of the waste discharge groove opening 220.

In this embodiment, the liquid pumping mechanism 300 includes an impeller plate 310 and a plurality of axial flow fan blades 320, the axial flow fan blades 320 are distributed in a circumferential direction and are uniformly spaced on the surface of the impeller plate 310, and a collecting hole 330 is formed between the axial flow fan blades 320.

Specifically, the axial flow fan 320 rotates at a high speed along with the drill main body 200 to guide the fluid inside the fluid guiding and guiding cover 110 into the space between the collecting holes 330, and the fluid is accumulated by the pressure and enters the main flow passage 230 to realize automatic flow guiding.

Further, a reinforcing column is disposed at the bottom end of the liquid guiding and guiding cover 110, the reinforcing column penetrates through the collecting hole 330 and is fixedly connected with the surface of the drill main body 200, the upper and lower ends of the axial flow fan 320 are respectively welded and fixed with the bottom surface of the impeller plate 310 and the top surface of the drill main body 200, and the bottom end of the driving shaft 100 is welded and fixed with the top surface of the impeller plate 310.

Specifically, the reinforcing columns and the welding are used to increase the connection strength between the driving shaft 100 and the bit body 200, thereby preventing the bit body 200 and the driving shaft 100 from being broken.

In this embodiment, a dynamic seal is sleeved on the surface of the driving shaft 100 inside the fixed liquid guiding cover 110, a dynamic seal ring abutting against the top surface of the drill body 200 is disposed on the bottom surface of the fixed liquid guiding cover 110, and a liquid flow pumping structure is fixedly connected to the end of the cooling liquid pipe 120.

Specifically, the coolant is supplied into the interior of the liquid guiding cap 110 by the liquid flow pumping mechanism connected to the outside, and is sealed by the driving shaft 100 and is stationary with respect to the bit body 200, so that the liquid flow is smoothly introduced into the interior of the liquid flow pumping mechanism 300 which rotates.

In this embodiment, the driving shaft 100 and the bit body 200 are high-speed alloy steel components, the bit body 200 has a conical structure, the plurality of evacuation notches 220 are arranged on the surface of the bit body 200 in a stepped manner, the end of the cutting step edge 210 extends to the surface of the evacuation notches 220, and the end of the cutting step edge 210 is provided with a cutting edge.

Specifically, the groove 220 for removing the waste forms a stepped cutting structure on the surface of the drill body 200 for drilling and reaming, and one drill can be used instead of a plurality of drills for machining holes with different diameters as required.

In this embodiment, the section of the waste discharge slot 220 is a right triangle structure, the inner side of the waste discharge slot 220 is a smooth surface structure, and the surface of the waste discharge slot 220 is hardened.

In this embodiment, the branch channels 231 are helical, one end of each of the branch channels 231 is communicated with the interior of the main channel 230, and the other end of each of the branch channels 231 is communicated with the plurality of liquid outlet guide openings 221 in a one-to-one correspondence manner, and the helical direction of the branch channels 231 is opposite to the cutting direction of the waste discharge slot opening 220.

Specifically, the liquid flow gets into the sprue 230 fast inside for the liquid flow flows, and the liquid flow distributes to moving back inside the useless notch 220 through subchannel 231, washes the sweeps, makes the sweeps derive fast, and the spiral of subchannel 231 revolves to and moves back the cutting direction of useless notch 220 and makes the inside liquid flow of subchannel 231 lead out through the faster centrifugation of rotation of drill bit main part 200 to the contrary.

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. An internally cooled stepped drill bit, comprising: a drive shaft (100), a bit body (200), and a fluid flow pumping mechanism (300), the liquid flow pumping mechanism (300) is fixedly arranged on the top surface of the drill bit main body (200), the drive shaft (100) is fixedly mounted to the top surface of the fluid pumping mechanism (300), a liquid guide cover (110) which is in sliding contact with the top surface of the drill bit main body (200) is sleeved on the surface of the driving shaft lever (100) in a rotating way, the liquid flow pumping mechanism (300) is positioned inside the liquid guiding and fixing cover (110), a cooling liquid pipe (120) is arranged on the surface of the liquid guiding and fixing cover (110), the surface of the drill bit main body (200) is provided with a cutting step edge (210) and a waste removing notch (220), a main runner (230) and a sub-runner (231) are arranged in the drill bit main body (200), the inner side of the waste discharge notch (220) is provided with a liquid outlet guide opening (221) communicated with the sub-runner (231).

2. The inner-cooling stepped drill bit as claimed in claim 1, wherein said fluid pumping mechanism (300) comprises an impeller disc (310) and a plurality of axial-flow blades (320), said axial-flow blades (320) are circumferentially distributed and uniformly spaced on the surface of the impeller disc (310), and flow collecting holes (330) are provided between said axial-flow blades (320);

specifically, the axial flow fan blades (320) rotate at a high speed along with the drill main body (200) to guide the liquid flow in the liquid guiding and guiding cover (110) into the space between the collecting holes (330) and enter the main flow passage (230) through the pressure accumulated by the liquid flow to realize automatic flow guiding.

3. The inner-cooling stepped drill bit as claimed in claim 2, wherein a reinforcing column is arranged at the bottom end of the liquid guiding and guiding cover (110), the reinforcing column penetrates through the collecting hole (330) and is fixedly connected with the surface of the drill bit main body (200), the upper end and the lower end of the axial flow fan blade (320) are respectively welded and fixed with the bottom surface of the impeller disc (310) and the top surface of the drill bit main body (200), and the bottom end of the driving shaft rod (100) is welded and fixed with the top surface of the impeller disc (310);

specifically, the connection strength between the driving shaft (100) and the drill bit main body (200) is increased by using a reinforcing column and welding, and the breakage between the drill bit main body (200) and the driving shaft (100) is avoided.

4. The inner-cooling stepped drill bit according to claim 1, characterized in that the inner side of the liquid guiding and fixing cover (110) is provided with a dynamic seal sleeved on the surface of the driving shaft rod (100), the bottom surface of the liquid guiding and fixing cover (110) is provided with a dynamic seal ring mutually abutted with the top surface of the drill bit main body (200), and the end part of the cooling liquid pipe (120) is fixedly connected with a liquid flow pumping structure;

specifically, the cooling liquid is sent into the interior of the liquid guiding and guiding cover (110) through a liquid flow pumping structure which is externally connected, and the cooling liquid is sealed by the driving shaft rod (100) and is static relative to the drill bit main body (200), so that the liquid flow is smoothly guided into the interior of the rotating liquid flow pumping mechanism (300).

5. The inner-cooling stepped drill bit as claimed in claim 1, wherein the driving shaft (100) and the drill bit body (200) are high-speed alloy steel components, the drill bit body (200) is of a conical structure, a plurality of the waste-removing notches (220) are arranged on the surface of the drill bit body (200) in a step shape, the end of the cutting step edge (210) extends to the surface of the waste-removing notches (220), and the end of the cutting step edge (210) is provided with a cutting edge;

specifically, the waste removing notch (220) is used for forming a stepped cutting structure on the surface of the drill bit main body (200) to drill and expand holes, one drill bit can replace a plurality of drill bits to be used, and holes with different diameters can be machined according to requirements.

6. The inner-cooling stepped drill bit as claimed in claim 1, wherein the cross-section of the waste removing notch (220) is a right triangle, the inner side of the waste removing notch (220) is a smooth surface structure, and the surface of the waste removing notch (220) is hardened.

7. The inner-cooling stepped drill bit as claimed in claim 1, wherein the branch channels (231) are helical, one end of each of the branch channels (231) is communicated with the inside of the main channel (230) and the other end is communicated with the liquid outlet guide ports (221) in a one-to-one correspondence manner, and the helical rotation direction of the branch channels (231) is opposite to the cutting direction of the waste removing notch (220);

specifically, the liquid flow gets into inside sprue (230) fast for the liquid flow flows, and the liquid flow distributes to moving back inside useless notch (220) through subchannel (231), washes the sweeps, makes the sweeps derive fast, and the spiral of subchannel (231) is revolved to the opposite direction of cutting that moves back useless notch (220) and is made the inside liquid flow of subchannel (231) to lead out through the rotation of drill bit main part (200) centrifugation more fast.