CN218170749U

CN218170749U - Novel self-tapping woodworking flat drill

Info

Publication number: CN218170749U
Application number: CN202222338262.1U
Authority: CN
Inventors: 张金层; 叶又生
Original assignee: Guangzhou Shenghua Industrial Co ltd
Current assignee: Guangzhou Shenghua Industrial Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-30
Anticipated expiration: 2032-09-02

Abstract

The utility model discloses a novel self-tapping woodworking flat drill, which comprises a hexagonal handle part and a round rod, wherein the hexagonal handle part is fixedly connected with the round rod, one end of the round rod is provided with a flat drill cutting part, the flat drill cutting part extends outwards to form a self-tapping thread point, and the self-tapping thread point comprises a set wear-out thread line; the spade drill cutting portion is the platykurtic structure, and the spade drill cutting portion includes main cutting edge and vice cutting edge, and main cutting edge grinds sharp angle, relief angle and forms the chisel edge, and vice cutting edge grinds relief angle and vice declination and forms week sword, the utility model discloses a change the slope angle of grinding now into and grind positive inclined plane or both sides side, further increase screw thread effective working area so that promote the drawing force of self tapping, and week sword changes thirty five degrees to sixty degree oblique angle or the function that the R angle circular arc also is favorable equally into.

Description

Novel self-tapping woodworking flat drill

Technical Field

The utility model relates to a self tapping carpenter flat drill technical field specifically is a novel self tapping carpenter flat drill.

Background

The flat drill is a woodworking tool, the head of the flat drill is flat, and the drill bit is made of alloy and is very hard. The wood flat drill used in the market at present is basically mature in process and applicable to general operation, for example, a self-tapping wood flat drill with the publication number of CN207757780U, improves the positioning blade tip, and can improve the drilling speed, automatically cut chips and guide chip removal by the added self-tapping thread tip for breaking a thread line, so that the drilling and cutting process is more labor-saving, convenient and smooth, the pressure applied by cutting can be reduced, the drilling and cutting speed is greatly improved, the production rate is improved, and the service life is prolonged.

On this basis, in order to promote self-tapping drawing force, the utility model discloses improve slope angle of attack, and when the carpenter carried out the operation, can touch old iron nail sometimes and can cause the blade to burst apart or bump dull blade, consequently also need improve on week sword, increase its nailing function to more adapt to the carpenter's operation.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

To prior art's not enough, the utility model provides a novel self tapping carpenter flat drill grinds a positive inclined plane through changing into the angle of grinding with current slope, and further increase screw thread effective working area so that promote self tapping drawing force, and week sword changes thirty-five degrees to sixty degrees oblique angle or the equally also function of favourable iron nail of beating of R angle circular arc characteristic into.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel self tapping carpenter flat drill, includes hexagonal stalk portion and round bar, hexagonal stalk portion and round bar fixed connection, its characterized in that: one end of the round rod is provided with a flat drill cutting part, the flat drill cutting part extends outwards to form a self-tapping thread tip, and the self-tapping thread tip comprises a wear-out thread line;

the flat drill cutting part is of a flat structure and comprises a main cutting edge and an auxiliary cutting edge, the main cutting edge is ground into a sharp angle and a rear angle to form a chisel edge, and the auxiliary cutting edge is ground into a rear angle and an auxiliary deflection angle to form a peripheral edge;

preferably, the peripheral edge is an R-angle arc characteristic cutting edge.

Preferably, the peripheral edge is a thirty-five degree to sixty degree beveled feature edge.

Preferably, two sides of the chisel edge are sharp-angled characteristic cutting edges.

Preferably, the grinding thread line is arranged on two sides of the self-tapping thread tip.

Preferably, the grinding thread line is arranged right above the self-tapping thread tip and is in one quarter of the position of the front surface and the back surface of the self-tapping thread tip.

(III) advantageous effects

Compared with the prior art, the utility model provides a novel self tapping carpenter flat drill possesses following beneficial effect:

in order to better adapt to the current woodworking environment, the cutting and grinding-off part of the flat drill is improved, the existing inclined grinding angle is changed into grinding of a front inclined surface or two side surfaces, the effective working area of threads is further increased so as to improve the drawing force of self tapping, and the peripheral edge is changed into a thirty-five degree to sixty degree oblique angle or an R angle circular arc, so that the function of tapping iron nails is also facilitated.

Drawings

Fig. 1 is a schematic view of a first embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1A of the present invention;

fig. 3 is a schematic view of a second embodiment of the present invention;

fig. 4 is a schematic view of a third embodiment of the present invention;

fig. 5 is an enlarged view of fig. 4B of the present invention.

In the figure: 1. a hexagonal shank; 2. a round bar; 3. a flat drill cutting part; 4. a self-tapping thread tip; 5. a secondary cutting edge; 51. a peripheral edge; 6. a main cutting edge; 61. a chisel edge; 7. and breaking the thread line.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.

Referring to fig. 1-5, the present invention: a novel self-tapping woodworking flat drill comprises a hexagonal handle part 1 and a round rod 2, wherein the hexagonal handle part 1 is fixedly connected with the round rod 2, one end of the round rod 2 is provided with a flat drill cutting part 3, the flat drill cutting part 3 extends outwards to form a self-tapping thread tip 4, and the self-tapping thread tip 4 comprises a wear-out thread line 7;

the flat drill cutting part 3 is of a flat structure, the flat drill cutting part 3 comprises a main cutting edge 6 and an auxiliary cutting edge 5, the main cutting edge 6 is ground into a sharp angle and a rear angle to form a cross edge 61, and the auxiliary cutting edge 5 is ground into a rear angle and an auxiliary deflection angle to form a peripheral edge 51;

as shown in fig. 1-2, as a first embodiment of the present invention, the present embodiment improves the oblique angle of wear on the basis of the existing carpentry flat drill, and it can be seen from the figure that the original oblique angle of wear is changed into the wear-off thread 7 arranged on the two side surfaces of the self-tapping thread tip 4, and this improvement will increase the effective working area of the thread, and naturally increase the self-tapping drawing force;

as shown in fig. 4-5, a third embodiment of the present invention, which is the same as the first embodiment, is to improve the oblique grinding angle, and is different from the first embodiment, it can be seen from the drawings that the original oblique grinding angle is changed to be the grinding thread 7 arranged right above the self-tapping thread tip 4, and it should be noted that the same technical effects can be achieved at any one quarter position of the right side and the reverse side of the self-tapping thread tip 4, and the design can be performed according to the actual production requirements;

in the first embodiment, the peripheral edge 51 is a characteristic cutting edge with an oblique angle of thirty-five to sixty degrees, and both sides of the chisel edge 61 are characteristic cutting edges with sharp angles;

as shown in fig. 3, as the second embodiment of the present invention, the same parts as the first embodiment are not repeated, and different from the first embodiment, the sharp angle of the peripheral edge 51 is changed to be the characteristic cutting edge of R-angle circular arc, it should be noted that the turning tool is usually not a point but a section of circular arc due to the process, the strength of the tool or other requirements, and this section of circular arc is called as R-angle, and this improvement can increase the effective working area of the thread so as to improve the pulling force of self-tapping, the peripheral edge 51 is changed to R-angle to facilitate the function of nailing, and the old iron nail can not be cracked or blunt by touching the cutting edge even though the wood is touched inside.

The tool can be suitable for electric hand drills, rechargeable drills and bench drills through the hexagonal handle (1), belongs to the category of woodworking drilling, and is only suitable for woodworking or plastics and other materials.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. The utility model provides a novel self tapping carpenter flat drill, includes hexagonal stalk portion (1) and round bar (2), hexagonal stalk portion (1) and round bar (2) fixed connection, its characterized in that: one end of the round rod (2) is provided with a flat drill cutting part (3), the flat drill cutting part (3) extends outwards to form a self-tapping thread tip (4), and the self-tapping thread tip (4) comprises a grinding thread line (7);

the flat drill cutting part (3) is of a flat structure, the flat drill cutting part (3) comprises a main cutting edge (6) and an auxiliary cutting edge (5), the main cutting edge (6) is ground into a sharp angle and a rear angle to form a cross edge (61), and the auxiliary cutting edge (5) is ground into a rear angle and an auxiliary deflection angle to form a peripheral edge (51).

2. A novel self-tapping carpenter's spade drill according to claim 1, characterized in that: the peripheral edge (51) is a characteristic cutting edge with an oblique angle of thirty-five degrees to sixty degrees.

3. A novel self-tapping carpenter's spade drill according to claim 1, characterized in that: the peripheral edge (51) is an R-angle arc characteristic cutting edge.

4. A novel self-tapping carpenter's spade drill according to claim 1, characterized in that: two sides of the cross edge (61) are sharp-angle characteristic cutting edges.

5. A novel self-tapping carpenter's spade drill according to claim 1, characterized in that: the grinding thread line (7) is arranged on two side faces of the self-tapping thread tip (4).

6. A novel self-tapping carpenter's spade drill according to claim 1, characterized in that: the grinding thread line (7) is arranged right above the self-tapping thread tip (4) and is at any one quarter position of the front surface and the back surface of the self-tapping thread tip (4).