CN112296404A

CN112296404A - Module drill bit

Info

Publication number: CN112296404A
Application number: CN202011260217.8A
Authority: CN
Inventors: 石凤武
Original assignee: Chengde Petroleum College
Current assignee: Chengde Petroleum College
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-02-02

Abstract

The invention belongs to the field of drill bits, and particularly relates to a modular drill bit which comprises a drill body and a drill bit connected with the drill body; the drill bit comprises a cutting end and a drill bit connecting end; the cutting end comprises a cutting edge, chip curling structures arranged on two sides of the cutting edge and chip separating grooves arranged on the chip separating structures; two axial arc grooves on the front cutter face of the cutting end, which are close to the position of the rotary center line of the drill bit, form a certain included angle with the axis of the drill bit, and the intersection line of the two axial arc grooves and the rear cutter face is in a large S shape; the drill bit connecting end comprises a bulge for axial positioning and a boss for circumferential positioning; the drill body comprises a drill body and a drill body connecting end arranged at the front end of the drill body; the drill body connecting end comprises a groove matched with the bulge and a concave platform matched with the boss; the drill bit body is provided with a cutting fluid hole. The technical scheme of the invention is suitable for high-speed processing of common machine tools and numerical control machine tools, is particularly suitable for processing cylindrical hole parts on an intelligent production line, and can realize efficient and safe production by selecting proper cutting parameters.

Description

Module drill bit

Technical Field

The invention belongs to the field of drill bits, and particularly relates to a modular drill bit.

Background

In either machine, no holes are inoperable. To connect the parts, screw holes, pin holes or rivet holes of various sizes are needed; various mounting holes are required for fixing the transmission part; the machine part itself has many holes of various kinds, and the formation of the holes requires the use of a drilling tool, which performs cutting mainly by a process in which a cutting edge rotationally receives cutting force and a chip flute is discharged. The existing module drill bit mainly adopts 7MP cooling liquid to break chips and force the chips to break, is difficult to adapt to the use requirements of common numerical control machines, has an unsatisfactory effect of cooling a main cutting edge, reduces the durability of a cutter, and simultaneously has lower repeated positioning precision and durability of module cutter positioning.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a modular drill.

In order to achieve the purpose, the invention adopts the following technical scheme:

a modular drill comprises a drill body and a drill bit connected with the drill body; the drill bit comprises a cutting end and a drill bit connecting end; the cutting end comprises two rear cutter faces, two front cutter faces, two symmetrical space curve cutting edges, chip separating structures arranged on two sides of the rear cutter faces and chip curling grooves arranged on the front cutter faces; the drill bit connecting end comprises a bulge for axial positioning and a boss for circumferential positioning; the drill body comprises a drill body and a drill body connecting end arranged at the front end of the drill body; the drill body connecting end comprises a groove matched with the bulge and a concave platform matched with the boss; the drill bit body is provided with a cutting fluid hole.

Two axial arc grooves arranged on the front cutter face of the cutting end and close to the rotary center line of the drill bit form included angles with the axis of the drill bit, and the intersection line of the two axial arc grooves and the rear cutter face is in a large S shape.

The lower end of the drill bit connecting end is provided with a connecting shaft; and the drill body is provided with a connecting hole and a bolt hole which are matched with the connecting shaft.

The chip reeling grooves are three with different depths.

The drill body is provided with two variable pitch spiral grooves.

Compared with the prior art, the invention has the beneficial effects that:

the technical scheme of the invention is suitable for high-speed processing of common machine tools and numerical control machine tools, is particularly suitable for processing cylindrical hole parts on an intelligent production line, can realize high-efficiency and safe production by selecting proper cutting parameters, realizes high-precision circumferential and axial matching by utilizing the bulges, the bosses, the grooves and the concave tables matched with the bulges and the bosses, improves the positioning precision, and simultaneously, the special shape of the cutting edge of the drill bit and the special structure of the cutting end and the chip liquid hole arranged on the drill bit body can form a circulation channel of cutting liquid, thereby solving the problem of heat dissipation of the cutter blade during drilling, reducing the cutting force, reducing the energy consumption of the machine tool, improving the durability of the cutter and ensuring the drilling quality.

Drawings

FIG. 1 is a schematic view of the overall construction of a modular drill bit according to the present invention;

FIG. 2 is a schematic diagram of the overall construction of a drill bit of the modular drill of the present invention;

fig. 3 is a schematic view of the overall structure of the drill body in the modular drill of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

Fig. 1-3 show a modular drill comprising a drill body 2 and a drill bit 1 connected to said drill body; the drill bit comprises a cutting end and a drill bit connecting end; the cutting end comprises two symmetrical space curve cutting edges 11 formed by two rear cutter surfaces and two front cutter surfaces, chip separating structures 12 arranged on two sides of the cutting edges and chip curling grooves 13 arranged on the front cutter surfaces; the chip reeling grooves are three with different depths. Two axial arc grooves arranged on the front cutter face of the cutting end and close to the rotary center line of the drill bit form included angles with the axis of the drill bit, and the intersection line of the two axial arc grooves and the rear cutter face is in a large S shape; the bit connecting end comprises a bulge 14 for axial positioning and a boss 16 for circumferential positioning; the drill body comprises a drill body and a drill body connecting end arranged at the front end of the drill body; the drill body connecting end comprises a groove 26 matched with the bulge 14 and a concave platform 25 matched with the boss 16;

the drill body contact end surface 24 of the drill body and the drill bit connecting end and the drill bit contact end surface 15 of the drill body and the drill bit connecting end are matched in size; the drill body is provided with a cutting fluid hole 27. The drill body is provided with two variable pitch spiral grooves 21. The lower end of the drill bit connecting end is provided with a connecting shaft; and the drill body is provided with a connecting hole and a bolt hole which are matched with the connecting shaft. When the drill bit is used, the drill bit is matched with the drill body, and then the bolt 3 penetrates through the bolt hole in the drill body to lock the drill bit and the drill body.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A modular drill is characterized by comprising a drill body and a drill bit connected with the drill body; the drill bit comprises a cutting end and a drill bit connecting end; the cutting end comprises two symmetrical space curve cutting edges formed by two rear cutter surfaces and two front cutter surfaces, chip separating structures arranged on two sides of the rear cutter surfaces and chip curling grooves arranged on the front cutter surfaces; the drill bit connecting end comprises a bulge for axial positioning and a boss for circumferential positioning; the drill body comprises a drill body and a drill body connecting end arranged at the front end of the drill body; the drill body connecting end comprises a groove matched with the bulge and a concave platform matched with the boss; the drill bit body is provided with a cutting fluid hole.

2. The modular drill bit of claim 1 wherein the lower end of the drill bit attachment end is provided with a coupling shaft; and the drill body is provided with a connecting hole and a bolt hole which are matched with the connecting shaft.

3. The modular drill of claim 1 wherein the flutes are three of unequal depth.

4. The modular drill bit of claim 1 wherein the drill body has two variable pitch helical flutes.

5. The modular drill of claim 1, wherein the two axial arc grooves on the rake face of the cutting tip located near the center of rotation of the drill form an angle with the axis of the drill, and the intersection with the relief face presents a large S-shape.