CN210256767U

CN210256767U - Cutter for drilling hard and brittle materials

Info

Publication number: CN210256767U
Application number: CN201920760819.6U
Authority: CN
Inventors: 赵学奇; 严军
Original assignee: Shunxing Technology Foshan Co Ltd
Current assignee: Shunxing Technology Foshan Co Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-04-07
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a cutter for hard and brittle material drilling processing, including blade pole portion, first sword head portion and second sword head portion, blade pole portion is the tubular structure, first sword head portion sets up the outer circumference side and the terminal surface position department of connecting the sword head end of blade pole portion, second sword head portion sets up the outer circumference side and the terminal surface position department of connecting first sword head portion; the hardness of the material of the second cutter head part is higher than that of the material of the cutter rod part. The utility model provides a cutter for hard and brittle material drilling processing has avoided the cutter to warp because of being heated, atress warp and produce in the course of working and lead to the hole site skew.

Description

Cutter for drilling hard and brittle materials

Technical Field

The utility model relates to a processing cutter technical field especially relates to a cutter that is used for hard brittle material drilling to process.

Background

Hard and brittle materials such as ceramic, glass, carborundum belong to superhard materials, have higher processing degree of difficulty, and the course of working makes the instrument produce the deformation because of high temperature, pressure, and wearing and tearing too fast, and carry out deep hole to it and add the hole site skew that can appear to the probability greatly, and the downthehole surface can cause the fish tail of different degrees because of the grinding residue simultaneously.

The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a cutter for hard and brittle material drilling processing has avoided the cutter to produce because of being heated, atress warp and lead to the hole site skew in the course of working.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a cutter for hard and brittle material drilling processing, including blade pole portion, first sword head portion and second sword head portion, blade pole portion is the tubular structure, first sword head portion sets up the outer circumference side and the terminal surface position department of connecting the sword head end of blade pole portion, second sword head portion sets up the outer circumference side and the terminal surface position department of connecting first sword head portion; the hardness of the material of the second cutter head part is higher than that of the material of the cutter rod part.

Preferably, the tool shank portion is made of a hard alloy material, the first tool bit portion is made of a hard metal material, and the second tool bit portion is made of diamond particles.

Preferably, the first cutter head part is welded and connected to the outer circumferential side surface and the end surface of the cutter head part of the cutter rod part.

Preferably, the second blade head portion is attached to the outer circumferential side surface and the end surface of the first blade head portion by adhesive plating.

Preferably, the length of the cutter rod part is 20-200 mm, the length of the first cutter head part is 2-20 mm, the length of the second cutter head part is 2-20 mm, and the length of the second cutter head part is smaller than or equal to the length of the first cutter head part.

Preferably, the ratio of the length of the first cutter head part to the length of the cutter rod part is 1: 4-1: 40, and the ratio of the length of the second cutter head part to the length of the cutter rod part is 1: 4-1: 40.

Preferably, the thickness of the first cutter head part is 0.1-0.5 mm, and the thickness of the second cutter head part is 0.1-3 mm.

Preferably, a plurality of chip grooves are formed in the tool bit end of the tool, the chip grooves extend from the end position of the tool bit end of the tool to the outer circumferential side surface of the tool bit end of the tool, and the plurality of chip grooves are uniformly arranged along the circumferential direction.

Preferably, the number of flutes is 2, 3, 4, 5 or 6.

Preferably, the width of the chip groove is 0.2-1 mm, and the depth is 0.5-5 mm.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a cutter for hard and brittle material drilling processing adopts the structure that the triplex combines, optimizes the instrument structure, sets up the second tool bit portion that the connection hardness is higher through the position department at the tool bit end of cutter arbor portion, improves the rigidity of cutter arbor when guaranteeing the machining precision, avoids the cutter arbor fracture, improves the tool performance.

Furthermore, the second tool bit part arranged on the outer surface of the tool bit end of the tool adopts a diamond particle adhesion process, so that the problem of hole position deviation caused by deformation due to heating and stress deformation in the machining process of the tool is solved; the cutter bar part made of hard alloy improves the defect that the cutter is broken due to insufficient rigidity; and the first cutter head part made of hard metal is used as the transition of the cutter rod part and the second cutter head part, so that the problem of poor bonding of hard alloy and diamond particles can be avoided.

Furthermore, grinding residues can be removed in time by cooling and chip removal of the central hole position, so that the damage of the grinding residues to the inner surface of the hole is reduced, and the form and position tolerance and the surface precision of the deep pore machining process are guaranteed in the aspect of tools; the chip removal groove is formed in the end of the cutter head of the cutter, chip removal is increased, chip removal force is reduced, and the purposes of protecting the cutter and prolonging the service life are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a tool for drilling hard and brittle materials according to a preferred embodiment of the invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is an enlarged schematic view at a in fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 to 3, the preferred embodiment of the present invention discloses a tool for drilling hard and brittle materials, which comprises a tool bar portion 10, a first tool bit portion 20 and a second tool bit portion 30, wherein the tool bar portion 10 is of a tubular structure, the first tool bit portion 20 is connected to the outer circumferential side and the end face position of the tool bit portion of the tool bar portion 10, the second tool bit portion 30 is connected to the outer circumferential side and the end face position of the first tool bit portion 20, and the hardness of the material of the second tool bit portion 30 is higher than that of the material of the tool bit portion 10.

The cutter rod part 10 is made of hard alloy materials, and the hard alloy materials are good in rigidity and not prone to fracture, so that the service life of the cutter can be prolonged; the first cutter head part 20 is made of hard metal materials, preferably stainless steel 06Cr19Ni10 is selected, so that the substrate is easy to process, good mechanical properties of the materials are guaranteed, the high-temperature and stress deformation of the materials in the processing process and the processing process of tools can be reduced, good heat conductivity is realized, heating is conducted in time, and the problem that the hard alloy and diamond particles are not firmly bonded can be avoided by using the materials as the transition between the cutter rod part 10 and the second cutter head part 30; the second blade portion 30 is made of diamond particles, preferably 200/230 # diamond particles (particle size 0.063/0.053mm) and can obtain a good finished surface quality.

The shank portion 10 and the first tool bit portion 20 may be integrated by brazing, and the second tool bit portion 30 and the first tool bit portion 20 may be integrated by electroplating with bright nickel as an adhesive, that is, the second tool bit portion 30 is bonded to the first tool bit portion 20 with an adhesive, where the bonding is electroplating.

The overall structure of the cutter rod part 10 can adopt a conical transition structure with two sections of cylindrical parts, the end part of the rear section is larger than the diameter of the end part of the cutter head, and the fracture during processing can be further avoided by increasing the diameter of the cylinder of the rear section.

In some embodiments, the length of the cutter bar part 10 is 20-200 mm, so that the stability of the axial grinding force of the drill bit during drilling and grinding is ensured; the length of the first cutter head part 20 is 2-20 mm, and the length ratio of the first cutter head part to the cutter rod part 10 is 1: 4-1: 40; the length of the second cutter head part 30 is 2-20 mm, and the length ratio of the second cutter head part to the cutter rod part 10 is 1: 4-1: 40; the length of the second cutter head part 30 is less than or equal to that of the first cutter head part 20, the hole wall roughness and the machined hole site can be selected by adjusting the length ratio of the second cutter head part 30 to the cutter bar part 10 to the length ratio of the first cutter head part 10 to the second cutter head part 30, and the smaller the ratio is, the smaller the value of the hole wall roughness is, and the lower the straightness of the hole site is; the larger the ratio is, the larger the roughness value of the hole wall is, and the higher the straightness of the hole site is; that is, the smaller the length of the diamond particle portion of the second tool tip portion 30 is, the smaller the portion of the material to be machined is acted upon during feeding, the higher the machining accuracy is, the smaller the roughness is, the smoother the tool is, the easier the tool setting is, the better the centering property is (that is, the higher the coaxiality is more easily achieved), and the lower the hole site straightness is.

In some embodiments, the thickness of the first tool bit 20 is 0.1-0.5 mm, which can ensure that the first tool bit is enough to be brazed with the hard alloy of the tool bar 10, and the axial grinding force of the drill bit is stable during drilling and grinding; the thickness of the second cutter head part 30 is 0.1-3 mm, the distribution area of radial holding force is dispersed when the drill bit drills and grinds, and the direction retentivity is good.

A plurality of chip flutes 40 are provided at the tip end of the tool, the chip flutes 40 extending from the tip end position of the tip end of the tool to the outer circumferential side face of the tip end of the tool, and the plurality of chip flutes 40 are uniformly arranged in the circumferential direction. The number of the chip grooves 40 can be 2, 3, 4, 5 or 6, the width is 0.2-1 mm, the depth is 0.5-5 mm, machining residues of the grinding head and the contact surface part can be discharged through the chip grooves, the machining surface is guaranteed, and meanwhile, the phenomenon that the stress inside the hole is uneven due to the fact that the residues are accumulated is avoided, so that the feeding directionality of the cutter is influenced.

In a specific embodiment, the length of the tool shank portion 10 is 130mm, the length of each of the first tool head portion 20 and the second tool head portion 30 is 5mm, the thickness of the first tool head portion 20 is 0.2mm, and the thickness of the second tool head portion 30 is 0.25 mm; four chip grooves 40 are formed in the cutter head portion of the cutter, the width of each chip groove is 0.5mm, the depth of each chip groove is 5mm, the chip grooves are used for chip removal, and the four chip grooves are evenly distributed along the circumferential direction.

The cutter for drilling the hard and brittle materials, which is preferably implemented by the utility model, has better hardness and wear resistance, can process the hard and brittle materials such as ceramics and glass, and improves the problems that the processed materials are damaged such as gaps and cracks, and the inner surface of the hole has ripples; the tool structure is optimized by adopting a structure of combining three parts, the rigidity of the cutter bar is improved while the processing precision is ensured, the cutter bar is prevented from being broken, and the tool performance is improved; specifically, the diamond particle adhesion process is adopted, so that the problem that hole site deviation is caused by deformation caused by heating and stress deformation of a cutter in the machining process is solved, and meanwhile, grinding residues can be timely removed by central hole site cooling (a cutter bar part with a tubular structure) and a chip removal mode, so that the damage of the grinding residues to the inner surface of a hole is reduced, and the form and position tolerance and the surface precision of a deep pore machining process are guaranteed in the aspect of tools; the cutter bar made of hard alloy improves the defect that the cutter is broken due to insufficient rigidity. In addition, the chip removal groove is formed in the end of the cutter head of the cutter, chip removal is increased, chip removal force is reduced, and the purposes of protecting the cutter and prolonging the service life are achieved.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the technical field of the utility model belongs to the prerequisite of not deviating from the utility model discloses, can also make a plurality of equal substitution or obvious variants, performance or usage are the same moreover, all should regard as belonging to the utility model's scope of protection.

Claims

1. The cutter for drilling the hard and brittle materials is characterized by comprising a cutter rod part, a first cutter head part and a second cutter head part, wherein the cutter rod part is of a tubular structure, the first cutter head part is connected to the outer circumferential side surface and the end surface of the cutter head end of the cutter rod part, and the second cutter head part is connected to the outer circumferential side surface and the end surface of the first cutter head part; the hardness of the material of the second cutter head part is higher than that of the material of the cutter rod part.

2. The tool for drilling hard and brittle materials as claimed in claim 1, characterized in that the shank part is made of cemented carbide material, the first head part is made of hard metal material and the second head part is made of diamond particles.

3. The tool for hard and brittle material drilling as claimed in claim 1, characterized in that the first tool bit part is welded at the location of the outer circumferential side and the end face of the tool bit end of the tool bit part.

4. The tool for hard and brittle material drilling according to claim 1, characterized in that the second tool bit part is attached at the outer circumferential side and end surface position of the first tool bit part by adhesive plating.

5. The tool for drilling hard and brittle materials as claimed in claim 1, characterized in that the length of the shank part is 20-200 mm, the length of the first tool head part is 2-20 mm, the length of the second tool head part is 2-20 mm, and the length of the second tool head part is less than or equal to the length of the first tool head part.

6. The tool for drilling hard and brittle materials as claimed in claim 1, characterized in that the ratio of the length of the first tool head part to the length of the tool shank part is 1: 4-1: 40, and the ratio of the length of the second tool head part to the length of the tool shank part is 1: 4-1: 40.

7. The tool for drilling hard and brittle materials as claimed in claim 1, characterized in that the thickness of the first tool head part is 0.1-0.5 mm, and the thickness of the second tool head part is 0.1-3 mm.

8. The tool for hard and brittle material drilling according to any of the claims 1 to 7, characterized in that a plurality of chip flutes are provided at the tool tip of the tool, the chip flutes extending from the end position of the tool tip end of the tool to the outer circumferential side of the tool tip end of the tool, wherein the plurality of chip flutes are arranged uniformly in the circumferential direction.

9. The tool for hard and brittle material drilling according to claim 8, characterized in that the number of flutes is 2, 3, 4, 5 or 6.

10. The tool for drilling hard and brittle materials as claimed in claim 8, characterized in that the width of the chip groove is 0.2-1 mm, and the depth is 0.5-5 mm.