CN-122008417-A - Cutting bit and drilling device

Abstract

The application relates to a cutting bit and a drilling device, which relates to the technical field of drill bits, wherein the cutting bit comprises a blade, the blade comprises a first blade body part and a second blade body part, the first blade body part is circularly arranged, the second blade body is the toper setting, and it includes first cone section and second cone section, and first cone is connected with first blade body, and first cone section is connected to the second cone section, and is the arc setting. On one hand, the sharp part of the conical drill point can be effectively eliminated, the abrasion rate and the breakage risk of the front end of the drill bit in the drilling process can be greatly reduced, so that the service life of the drill bit is prolonged, on the other hand, the impact force of the drill bit when cutting into a workpiece is more uniform and softer, and the defects of breakage, extrusion breakage, internal stress crack and the like of materials at the orifice of the workpiece due to concentrated stress are effectively avoided. Meanwhile, the second blade body is arranged in a conical mode, so that the drill bit can effectively and gradually cut into hard and brittle materials, and cutting efficiency and cutting stability are both considered.

Inventors

• ZHANG ZONGCHAO
• LIU SHIJIE

Assignees

• 嘉兴沃尔德金刚石科技有限公司

Dates

Publication Date

20260512

Application Date

20260325

Claims (10)

1. 1. A cutting bit, characterized in that the cutting bit comprises a cutting edge (1), the cutting edge (1) comprising: a first blade body (11) arranged in a circular shape, and The second sword body (12) is the toper setting, second sword body (12) include first cone section (121) and second cone section (122), first cone with first sword body (11) are connected, second cone section (122) are connected first cone section (121), and are the arc setting.
2. 2. The cutting bit according to claim 1, wherein the first blade body (11) has a diameter D and the second cone section (122) has a radius R, wherein 5% d≤r≤10% D.
3. 3. The cutting bit according to claim 1, wherein the taper of the second blade body (12) is α, wherein 30 ° - α -70 °.
4. 4. The cutting bit according to claim 1, wherein the second cone segment (122) comprises a plurality of arcuate edges (1221) disposed at intervals along the circumference of the second cone segment (122), the first edge body (11) having a diameter D, the arcuate edges (1221) having a width L1, wherein: 1% D≤L1≤5% D, and/or, Blade slots (1222) are arranged between adjacent arc-shaped blades (1221).
5. 5. The cutting bit according to claim 4, wherein the blade slot (1222) has a width L2, wherein 10L 1-L2-20L 1, and/or, The length settings of the plurality of blade slots (1222) of the second cone segment (122) are different.
6. 6. The cutting bit according to claim 4, wherein chip grooves (1223) communicating with the blade slots (1222) are further provided between adjacent arcuate blades (1221).
7. 7. The cutting bit according to claim 6, wherein a distance between the blade slot (1222) and a cone apex of the second blade body (12) is less than a distance between the junk slots (1223) and a cone apex of the second blade body (12), and/or, The blade slots (1222) have a width L2, the junk slots (1223) have a width L3, wherein 3L2 is less than or equal to L3 is less than or equal to 5L2, and/or, The junk slots (1223) are provided with cooling holes (1224) for discharging cooling fluid.
8. 8. The cutting bit according to claim 7, wherein a distance between an end of the blade slot (1222) proximate the tip of the second blade body (12) and an end of the junk slot (1223) proximate the tip of the second blade body (12) is L4, wherein 0.02mm ∈l4 ∈0.05mm.
9. 9. Cutting bit according to claim 1, characterized in that the material of the second blade body (12) is polycrystalline diamond, and/or, The cutting drill bit further comprises a tool apron (2), and the tool apron (2) and the cutting edge (1) are integrally formed.
10. 10. Drilling device, characterized by comprising a cutting bit according to any one of claims 1 to 9.

Description

Cutting bit and drilling device Technical Field The application relates to the technical field of drill bits, in particular to a cutting drill bit and a drilling device. Background In modern manufacturing industry, hard and brittle materials such as aluminum nitride, silicon carbide, zirconia and the like are widely applied to the fields of aerospace, electronic components, semiconductors and the like by virtue of high hardness, high strength, high wear resistance and good optical and electrical properties. In the production and manufacturing processes in the above fields, workpieces of hard and brittle materials often involve hole machining requirements of various specifications. However, the inherent high hardness and low toughness of hard and brittle materials makes hole machining difficult to achieve, and places extremely high demands on the performance of the machining tool. Polycrystalline diamond (PCD) is an ideal material for a hole-machining tool of a hard and brittle material due to its excellent hardness, high wear resistance, good thermal conductivity, low coefficient of friction and small coefficient of thermal expansion, and PCD drill bits have therefore found wide application in the field of hole-machining of hard and brittle materials. Currently, PCD drills for boring hard and brittle materials typically employ conventional conical drill tip structures with a bit section consisting essentially of a conventional cylindrical blade body and a single straight conical blade body at the front end. In actual drilling, the conical blade body with a sharp point at the front end is mainly used for firstly contacting a hard and brittle material workpiece to position and cut into, and then the whole drilling process is finished through the blade body at the rear section. However, the hard and brittle materials have extremely high hardness and wear resistance, and sharp drill point parts bear highly concentrated stress and intense friction in the drilling process, so that rapid abrasion and breakage easily occur, the service life of the drill bit is short, the cutters are required to be replaced frequently, the production efficiency is seriously reduced, and meanwhile, concentrated impact force generated when the sharp drill point cuts into a workpiece easily causes the defects of stress breakage, extrusion breakage, even internal stress crack and the like of the material at the orifice of the workpiece, and the processing quality is influenced. Disclosure of Invention The application provides a cutting bit, which aims to solve the problem that the prior cutting bit is easy to wear and break when processing hard and brittle materials so as to have short service life. In a first aspect, the present application provides a cutting bit according to the following technical solution: a cutting bit comprising a cutting edge, the cutting edge comprising: a first blade body circularly arranged, and The second sword body is the toper setting, second sword body includes first cone section and second cone section, first cone with first sword body coupling, the second cone section is connected first cone section, and be the arc setting. Through adopting above-mentioned technical scheme, adopt the second cone section that the arc set up, on the one hand, can effectively eliminate the sharp-pointed position of toper drill point, will concentrate on the high stress dispersion of cone point to the arc curved surface originally, can reduce the wearing rate of drill bit front end in the drilling in-process by a wide margin and collapse and lack the risk, thereby help prolonging the life of drill bit, reduce the cutter and change the frequency, improve production efficiency, on the other hand, impact force when making the drill bit cut into the work piece is more even and soft, effectively avoid the work piece drill point department material to collapse, extrude to collapse and defect such as internal stress crack because of the atress concentration, help promoting the surface quality and the machining precision of hole processing. Simultaneously, the second blade body adopts the toper setting, guarantees that the drill bit can cut into hard brittle material step by step effectively, compromise cutting efficiency and cutting stability for the cooperation of arc drill point and toper blade body realizes the dual promotion to drill bit life-span and work piece processingquality when guaranteeing high-efficient drilling ability. Optionally, the diameter of the first blade body is D, and the radius of the second cone section is R, wherein R is more than or equal to 5% and less than or equal to 10% of D. Through adopting above-mentioned technical scheme, through limiting the radius R of second cone section in 5%D to 10%D for the drill bit front end can effectively disperse local stress, reduce drill point wearing and tearing and burst the risk when cutting into hard brittle material, can control cutting area at reasonable level