CN115283732A

CN115283732A - Art drill

Info

Publication number: CN115283732A
Application number: CN202211035667.6A
Authority: CN
Inventors: 程国标
Original assignee: Guangdong Kanoya Home Furnishing Co ltd
Current assignee: Guangdong Kanoya Home Furnishing Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-04
Anticipated expiration: 2042-08-26
Also published as: CN115283732B

Abstract

The invention discloses a technical drill, which aims to form a cutting edge through an additionally processed cutter body and reduce the processing difficulty, and the technical scheme is as follows: a technical drill comprises a vertically arranged drill rod, wherein two drill bodies which are centrosymmetric around the drill rod are arranged at the bottom of the drill rod, cutter bodies which extend along the radial direction of the drill rod are arranged on the drill bodies, a first cutting edge is arranged at the lower end of each cutter body, a second cutting edge is arranged at one end, far away from a rotation center, of each cutter body, the first cutting edges of the two cutter bodies are overlapped on the axis of the drill rod, and the first cutting edges are bent upwards along the direction far away from the rotation center, and the technical field of furniture processing is provided.

Description

Art drill

Technical Field

The invention belongs to the technical field of furniture processing, and particularly relates to a process drill.

Background

On furniture such as door plant, plaque, window frame, often need process the recess, and in order to let the recess more pleasing to the eye, the lateral wall of recess can possess certain radian, and this kind of processing that has the radian needs to use special drill bit.

To this situation, CN215848703U discloses a cutter for cutting hierarchical side grooves, which includes a blade, the blade includes a first layer of groove sharpening, a second layer of groove sharpening, and a side sharpening, which are sequentially arranged from bottom to top, the transverse protruding lengths of the three are sequentially decreased progressively, the edges of the three extend to form a cutting edge, and the bottom end of the cutting edge is a tip.

The shape of the cutting edge of the cutter is special, so that a groove with a cambered side wall can be machined;

however, the above-mentioned cutting tools are integrally machined to form the cutting edges, which is difficult to machine and expensive;

in addition, in actual processing, the side wall of some grooves has a longer extension length in the horizontal direction, and the length of the corresponding cutter in the radial direction is also longer, so that the cutter shakes during rotary cutting, and the shaking amplitude is larger at the position where the cutter is farther away from the rotation center of the cutter, so that the surface of the groove is not smooth enough after cutting, and the attractiveness of furniture is influenced.

Disclosure of Invention

The invention mainly aims to provide a process drill, which aims to form a cutting edge by a cutter body additionally machined, so that the machining difficulty is reduced.

According to a first aspect of the invention, a technical drill is provided, which comprises a drill rod arranged vertically, wherein the bottom of the drill rod is provided with two drill bodies which are arranged symmetrically around the drill rod, the drill bodies are provided with cutter bodies which extend along the radial direction of the drill rod, the lower ends of the cutter bodies are provided with first cutting edges, the ends of the cutter bodies far away from the rotation center are provided with second cutting edges, the first cutting edges of the two cutter bodies are overlapped on the axis of the drill rod, and the first cutting edges are bent upwards along the direction far away from the rotation center.

In the technical drill, one surface of the cutter body, which is far away from the drill body, is a front cutting surface, the bottom surface of the cutter body is a rear cutting surface, the first cutting edge is formed between the front cutting surface and the rear cutting surface, and the cutting edge angle of the first cutting edge is gradually increased along the direction far away from the rotation center.

In the above-mentioned craft drill, the front cutting edge face is a vertical face, the rear cutting edge face is inclined upward in a direction away from the front cutting edge face, and the cutting edge angle of the first cutting edge is 40-75 °.

In the above-mentioned craft drill, an end surface of one end of the cutter body away from the rotation center is a side cutting edge surface, and the second cutting edge is formed between the front cutting edge surface and the side cutting edge surface.

In the above technical drill, the cutting edge angle of the second cutting edge is 40-55 °.

In the technical drill, the thickness of the cutter body is gradually increased along the direction far away from the rotation center.

In the technical drill, the thickness of the cutter body is 2-8mm.

In the above-mentioned process drill, the thickness of the drill body is gradually reduced along a direction away from the rotation center.

One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

according to the invention, the first cutting edge and the second cutting edge are both arranged on the cutter body, and the cutter body and the drill body can be separately processed and then fixed together, so that the processing difficulty is effectively reduced;

simultaneously, the edge angle of first cutting edge is along keeping away from the direction of rotation center grow gradually, and the thickness of cutter body also is along keeping away from the direction of rotation center and increase gradually for the cutter body can keep better rigidity, reduces the shake of drill bit, and the recess surface of processing out is more smooth.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a front view of embodiment 1 of the present invention;

FIG. 2 is a top view of embodiment 1 of the present invention;

FIG. 3 is a bottom view of embodiment 1 of the present invention;

FIG. 4 isbase:Sub>A sectional view A-A of FIG. 1 in accordance with embodiment 1 of the present invention;

fig. 5 is a sectional view B-B of fig. 1 of embodiment 1 of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the invention.

Example 1

Referring to fig. 1 to 5, in one embodiment of the present invention, a process drill includes a drill rod 1 arranged vertically, two drill bodies 2 arranged at the bottom of the drill rod 1 and centered symmetrically around the drill rod 1, a cutter body 3 extending along the radial direction of the drill rod 1 is arranged on each drill body 2, a first cutting edge 31 is arranged at the lower end of each cutter body 3, a second cutting edge 32 is arranged at one end of each cutter body 3 away from the rotation center, the first cutting edges 31 of the two cutter bodies 3 are overlapped on the axis of the drill rod 1, and the first cutting edges 31 are bent upward in the direction away from the rotation center;

the first cutting edge 31 and the second cutting edge 32 are both arranged on the cutter body 3, the cutter body 3 and the drill body 2 can be separately processed and then fixed together in a welding mode and the like, and the processing difficulty is effectively reduced;

when the process drill is used for processing, the first cutting edge 31 and the second cutting edge 32 of the cutter body 3 are matched to process a groove, and the shape of the first cutting edge 31 and the second cutting edge 32 is the profile of the side wall of the groove in the vertical direction.

Specifically, one surface of the cutter body 3 away from the drill body 2 is a front cutting edge surface 33, the bottom surface of the cutter body 3 is a rear cutting edge surface 34, a first cutting edge 31 is formed between the front cutting edge surface 33 and the rear cutting edge surface 34, and the cutting edge angle of the first cutting edge 31 gradually increases in a direction away from the rotation center;

the length direction of the first cutting edge 31 extends in a direction away from the rotation center, when the drill rod is rotated, the first cutting edge 31 rotates around the drill rod 1, the linear velocity of each point on the first cutting edge 31 is different, and the linear velocity is more serious the farther the point on the first cutting edge 31 is from the rotation center, the more the linear velocity is; after the edge angle of the first cutting edge 31 is gradually increased along the direction away from the rotation center, the strength of the first cutting edge 31 can be gradually increased, the stability and the rigidity of the cutter body 3 are increased, and the shaking of the cutter body 3 is reduced; especially, the more the position of the cutter body 3 far away from the rotating center is shaken more seriously, so that the surface finish degree of the groove processed is more uniform.

In this embodiment, the front blade surface 33 is a vertical surface, the rear blade surface 34 is inclined upward in a direction away from the front blade surface 33, and the blade angle of the first cutting edge 31 is 40 to 75 degrees; preferably, the edge angle of the first cutting edge 31 is 45-70 °;

that is, the cutting edge angle of the first cutting edge 31 gradually increases from 45 ° to 70 °, and in this range, the normal cutting by the first cutting edge 31 is not affected, and the chattering of the cutter body 3 can be suppressed.

In this embodiment, the end surface of the end of the cutter body 3 away from the rotation center is a side cutting edge surface 35, and a second cutting edge 32 is formed between the front cutting edge surface 33 and the side cutting edge surface 35; the second cutting edge 32 extends generally vertically, and the second cutting edge 32 is away from the center of rotation, and the edge angle thereof cannot be too small;

generally, the edge angle of the second cutting edge 32 is 55-75 °; as a specific embodiment of the present embodiment, the edge angle of the second cutting edge 32 is 70 °.

The two drill bodies 2 are actually arranged diagonally, one surface of the cutter body 3 opposite to the front blade surface 33 is fixed on one surface of the drill body 2 close to the drill rod 1, a vacant position between the two drill bodies 2 forms a chip discharge space, and the chips cut by the first cutting blade 31 can be positioned in the chip discharge space; and one side of the drill body 2 close to the side cutting edge surface 35 of the cutter body 3 on the other drill body 2 is an arc-shaped surface which is bent upwards for guiding, so that the chips can be conveniently discharged.

In order to further improve the strength of the cutter body 3, the thickness of the cutter body 3 is gradually increased along the direction far away from the rotating center; the strength of the first cutting edge 31 can be gradually increased along the direction away from the rotation center, and the gradually increased edge angle of the first cutting edge 31 can be matched to inhibit the shaking of the cutter body 3 during cutting, so that the shaking amplitude of one end of the cutter body 3 away from the rotation center is reduced; meanwhile, the second cutting edge 32 is more stable during cutting, and the cutting effect is good.

In the embodiment, the thickness of the cutter body 3 is 2-8mm; preferably, the thickness of the cutter body 3 is 3-7mm;

that is to say, the thickness of cutter body 3 increases to 7mm from 3mm gradually, can not excessively increase the weight of cutter body 3, influences the rotation of technology brill.

In the embodiment, the length of the projection of the cutter body 3 on the horizontal plane is 80mm; referring to fig. 1 and 4, the edge angle α of the first cutting edge 31 atbase:Sub>A positionbase:Sub>A-base:Sub>A is 57 °, and the thickness of the cutter body 3 at this position is 5mm; referring to fig. 1 and 5, the cutting edge angle β of the first cutting edge 31 at the B-B position is 67 °, and the thickness of the cutter body 3 at this position is 6.5mm; it can be seen that beta is larger than alpha and the thickness of the body 3 is increasing.

Meanwhile, the thickness of the drill body 2 is gradually reduced along the direction far away from the rotating center, so that the weight change of the drill body 2 and the cutter body 3 is not too large, the integral moment of inertia cannot be changed greatly, the drill rod 1 does not need to be thickened, and the drill rod can be suitable for previous clamps.

Comparative example 1

The same as example 1, except that: the edge angle of the first cutting edge 31 does not gradually increase in a direction away from the rotation center, but remains uniform;

specifically, the edge angle of the first cutting edge 31 is 45 degrees; in this way, the first cutting edge 31 has a relatively good cutting ability during cutting, but the strength of the first cutting edge 31 is insufficient, and the portion of the first cutting edge 31 that is farther from the rotation center still vibrates, the cutter body 3 shakes, and the amplitude of the positional shake increases as the cutter body 3 is farther from the rotation center; although the thickness of the cutter body 3 gradually increases in the direction away from the rotation, it is only to increase the strength of the cutter body 3, and the strength of the first cutting edge 31 cannot be increased, and the chattering of the cutter body 3 can be only slightly reduced; the surface smoothness of the processed groove is not uniform enough, especially the side wall area of the groove is rougher, the appearance is influenced, and the subsequent film covering or adhesive film is not facilitated.

It was found after comparative experiments between comparative example 1 and example 1 that example 1 allows the surface finish of the grooves to be more uniform, and the peripheral regions of the grooves are not rougher than the central regions of the grooves.

Comparative example 2

Substantially the same as in example 1, except that: the thickness of the cutter body 3 does not increase gradually in the direction away from the rotation center, but is kept consistent;

specifically, the thickness of the cutter body 3 is 4mm; since the linear velocity of the part of the first cutting edge 31 that is farther from the rotation center is higher, the part of the cutter body 3 that is farther from the rotation center is subjected to greater impact during cutting, and the thickness of the cutter body 3 is uniform, the strength of the part subjected to greater impact is insufficient, so that the cutter body 3 shakes, and the shaking range of the position of the cutter body 3 that is farther from the rotation center is larger; meanwhile, the stability of the second cutting edge 32 during cutting is reduced, and the cutting effect of the second cutting edge 32 is affected;

the edge angle of the first cutting edge 31 is gradually increased along the direction away from the rotation center, so that the strength of the first cutting edge 31 is increased, and the shaking of the cutter body 3 can be only slightly reduced; the surface smoothness of the groove processed under the condition is not uniform enough, particularly the side wall area of the groove is rougher, the appearance is influenced greatly, and the subsequent film covering or adhesive film is not facilitated.

It was found after comparative experiments between comparative example 2 and example 1 that example 1 can make the surface finish of the grooves more uniform, and the peripheral regions of the grooves are not rougher than the central regions of the grooves.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The technical drill comprises a drill rod which is vertically arranged, wherein two drill bodies which are centrosymmetric around the drill rod are arranged at the bottom of the drill rod, and the technical drill is characterized in that a cutter body which extends along the radial direction of the drill rod is arranged on each drill body, a first cutting edge is arranged at the lower end of each cutter body, a second cutting edge is arranged at one end, far away from the rotation center, of each cutter body, the first cutting edges of the two cutter bodies are overlapped on the axis of the drill rod, and the first cutting edges are bent upwards along the direction far away from the rotation center.

2. The bur of claim 1, wherein the side of the body distal from the body is a leading edge surface, the bottom surface of the body is a trailing edge surface, the first cutting edge is formed between the leading edge surface and the trailing edge surface, and the cutting angle of the first cutting edge increases in a direction away from the center of rotation.

3. The craftsman drill of claim 2 wherein said front facet vertical face, said rear facet is upwardly inclined in a direction away from said front facet, said first cutting edge having an edge angle of 40-75 °.

4. The pilot drill of claim 2 wherein the end surface of the end of the tool body remote from the center of rotation is a flank, the second cutting edge being formed between the leading flank and the flank.

5. The pilot drill of claim 4, wherein the edge angle of the second cutting edge is 40-55 °.

6. The pilot drill of claim 1, wherein the thickness of the tool body increases in a direction away from the center of rotation.

7. The bur of claim 6, wherein the thickness of the body is 2-8mm.

8. The craft drill of claim 6, wherein the thickness of the drill body tapers in a direction away from the center of rotation.