CN220178253U

CN220178253U - Twist drill matched with metal 3D printing material tapping piece

Info

Publication number: CN220178253U
Application number: CN202321447805.1U
Authority: CN
Inventors: 臧英旭; 吴巧巧; 于鹏超; 张国良
Original assignee: Shanghai Radium Technology Co ltd
Current assignee: Shanghai Radium Technology Co ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-12-15
Anticipated expiration: 2033-06-07

Abstract

The utility model relates to a twist drill matched with a metal 3D printing material tapping piece, and belongs to the technical field of 3D printing. The cutting part of the twist drill is 0.1mm larger than the single side of the cutting part of a standard drill matched with a standard bottom hole, and the chisel edge length of the drill point of the cutting part of the twist drill is 1mm; the tapping piece is provided with a preformed hole, and the diameter of the preformed hole is half of the diameter of the cutting part of the twist drill; the diameter of the preformed hole is half of the diameter of the tapping bottom hole. The utility model effectively solves the problems that the threads with various specifications of the 3D printed part are difficult to process and even fail to process, improves the processing efficiency and reduces the processing cost.

Description

Twist drill matched with metal 3D printing material tapping piece

Technical Field

The utility model relates to a twist drill matched with a metal 3D printing material tapping piece, and belongs to the technical field of 3D printing.

Background

The 3D printing technology is a novel material forming technology developed in the early 80 th century, and the principle of the technology is that a three-dimensional model of a required product is established by a computer, then the three-dimensional solid model of the product is processed into a series of two-dimensional sections by using layering slicing software, and then the material is sintered layer by layer according to the shape of the two-dimensional sections by adopting 3D printing equipment, so that the three-dimensional solid product is finally obtained. Because of the modeling and structural requirements, the metal 3D printing workpiece often relates to a tapping process, but the printing state hardness of part of the metal 3D printing material can reach 40-50HRC, so that a drill bit and a tap can be broken or damaged, and the processing difficulty is increased. The reason for this was found to be the following: 1. for the drill bit, when the reserved hole diameter of the bottom hole is larger, the cutting stress point of the drill bit is close to the edge of the cutting edge, the stress of the edge of the cutting edge is larger, the edge part is thinner, the stress bearing capacity is poor, and the drill bit is easier to collapse under the condition of uneven stress. 2. For the tap, the existing bottom hole aperture is difficult to process, the hardness of the material is high, the cutting amount is large, and the tap is easier to break. Therefore, there is a need in the art for a special twist drill suitable for tapping metal 3D printing materials.

Disclosure of Invention

The utility model aims to solve the technical problem of how to obtain a special twist drill suitable for tapping of a metal 3D printing material.

In order to achieve the aim of solving the problems, the technical scheme adopted by the utility model is to provide the twist drill matched with the metal 3D printing material tapping piece, wherein the cutting part of the twist drill is 0.1mm larger than the single side of the cutting part of a standard drill matched with a standard bottom hole, and the chisel edge length of the drill tip of the cutting part of the twist drill is 1mm; the tapping piece is provided with a preformed hole, and the diameter of the preformed hole is half of the diameter of the cutting part of the twist drill; the diameter of the preformed hole is half of the diameter of the tapping bottom hole.

Preferably, the front angle of the end face of the twist drill cutting part is 130 degrees.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model effectively solves the problems that the threads with various specifications of the 3D printed part are difficult to process and even fail to process, improves the processing efficiency and reduces the processing cost.

Drawings

FIG. 1 is a schematic diagram of a special twist drill structure of the utility model;

FIG. 2 is a schematic diagram of the end face structure of the twist drill of the present utility model;

FIG. 3 is a schematic view of the structure of the tapping member according to the present utility model;

fig. 4 is a schematic diagram of a machine tool used in the application of the present utility model.

Reference numerals: 1. a knife handle; 2. a cutting portion; 3. a chisel edge; 4. tapping piece; 5. a vertical milling head; 6. a machine tool body; 7. a working table.

Detailed Description

In order to make the utility model more comprehensible, preferred embodiments accompanied with the accompanying drawings are described in detail as follows:

as shown in fig. 1-4, the utility model provides a twist drill matched with a metal 3D printing material tapping piece, wherein the cutting part 2 of the twist drill is 0.1mm larger than the single side of the cutting part of a standard drill matched with a standard bottom hole, and the length of the chisel edge 3 of the drill tip of the cutting part 2 of the twist drill is 1mm; the tapping piece 4 is provided with a preformed hole, and the diameter of the preformed hole is half of the diameter of the twist drill cutting part 2; the diameter of the preformed hole is half of the diameter of the tapping bottom hole. The cutting angle of the end face of the twist drill cutting part 2 is 130 degrees.

Examples

The technical scheme of the utility model comprises the following steps:

on the one hand, in the drilling preparation stage, a twist drill made of cemented carbide is prepared, the twist drill comprises a cutter body rotating along a central shaft, a cutter handle 1 is arranged on the left section of the cutter body, and a twist drill cutting part 2 is arranged on the right section of the cutter body. The front angle of the end face of the twist drill cutting part 2 is 130 degrees; the length of the chisel edge 3 part of the twist drill cutting part 2 is 1mm; the diameter of the twist drill cutting part 2 is 0.1mm larger than the single side of a standard drill cutting part.

Among the above, the function of the sharp angle is to increase the strength of the drill bit, reduce the deformation and the torque, and make the drill bit not easy to break; when the length of the chisel edge is about 1mm, the cutting resistance is smaller while the strength of the knife edge is ensured; the diameter of the drill bit is enlarged because a larger bottom hole is obtained, subsequent tapping operation can be facilitated, the cutting amount of the tap can be reduced by the larger bottom hole, the processing difficulty is reduced, and the screw thread quality is not affected by the single-side enlargement of 0.1mm through verification.

In one aspect, a tapping member 4 is provided, and the reserved hole diameter of the tapping member 4 is half of the diameter of a bottom hole obtained by subsequent drilling in the 3D printing model processing stage.

(bottom hole means a bottom hole with a single side of 0.1mm larger than that machined by the twist drill special drill head.)

The purpose of doing so is to make the pore wall of the workpiece preformed hole just contact the middle part of the cutting edge of the drill bit when drilling, so that the stress of the cutting edge is uniform, and the resistance and the cutting ability of the edge are improved.

As shown in fig. 1, the cutter handle 1 is connected with the twist drill cutting part 2, the twist drill cutting part 2 is 0.1mm larger than the single side of the standard drill cutting part, and a special bottom hole which is 0.1mm larger than the single side of the standard bottom hole can be obtained by processing through the twist drill cutting part 2, so that the subsequent tapping difficulty is reduced.

The chisel edge 3 belongs to a part of the twist drill cutting part 2, is positioned at two sides of the drill point of the twist drill cutting part 2, and has the length of 1mm, so that the cutting resistance is smaller while the knife edge strength can be ensured.

The 3D printing tapping 4 is characterized in that: the diameter of the reserved hole is half of the diameter of the cutting part 2 of the twist drill, so that the subsequent processing difficulty can be reduced.

The steps of using the 3D printing tapping piece of the present utility model are as follows:

clamping the cutter handle 1 on the vertical milling head 5; the machine tool body 6 is provided with a workbench 7 and a vertical milling head 5;

and step two, clamping the 3D printing tapping piece 4 on the workbench 7.

And step three, machining the 3D printing tapping piece 4 by using the twist drill cutting part 2 to obtain a required bottom hole. Note that each drill feed should be 0.5mm-1mm, during which time the drill is guaranteed to cool.

According to the embodiment, different preformed hole schemes and special drills can be selected according to different requirements, the problem that threads of various specifications of 3D printed parts are difficult to machine and even cannot be machined is effectively solved, machining efficiency is improved, and machining cost is reduced.

While the utility model has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims. Equivalent embodiments of the present utility model will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. The twist drill matched with the metal 3D printing material tapping piece is characterized in that the cutting part of the twist drill is 0.1mm larger than the single side of the cutting part of a standard drill matched with a standard bottom hole, and the chisel edge length of the drill point of the cutting part of the twist drill is 1mm; the tapping piece is provided with a preformed hole, and the diameter of the preformed hole is half of the diameter of the cutting part of the twist drill; the diameter of the preformed hole is half of the diameter of the tapping bottom hole.

2. A twist drill for use with a metallic 3D printed material tap as defined in claim 1 wherein the angle of the twist drill cutting end face is 130 °.