Woodworking tapper capable of rapidly discharging chippings

Abstract

The utility model relates to the technical field of woodworking tools, and discloses a quick chip removal woodworking tapper which comprises a tool body, the tool body is in a cylinder shape with an opening in one side, a plurality of sawteeth which are evenly distributed on the circumference are formed at the end of the opening side of the tool body, and a plurality of chip removal grooves which are evenly distributed are formed in the side wall of the tool body. And one side, close to the sawteeth, of the chip groove is opened. The chip removal grooves are formed, so that chips can be conveniently removed in the hole opening process, and the hole opening efficiency is improved; and the area between the adjacent chip grooves is provided with full teeth, so that the tapping efficiency can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of woodworking tools, in particular to a quick-cutting woodworking hole opener. Background Art

[0002] Existing woodworking hole saws are generally in the shape of a cylinder with an open side. The open side of the cylinder is provided with a plurality of serrations. When the existing woodworking hole saws are used to drill holes in wooden boards, wood chips cannot be discharged. The hole saws need to be lifted up several times to separate the hole saws from the wooden boards before chip removal can be performed, resulting in relatively low woodworking hole drilling efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a fast-cutting woodworking hole opener, which can facilitate chip removal during the hole opening process by providing a chip removal groove, thereby improving the hole opening efficiency; and the hole opening efficiency can be further improved by setting full teeth in the area between adjacent chip removal grooves.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A fast-cutting woodworking hole opener includes a tool body, which is cylindrical with one side open. The open side end of the tool body is formed with a plurality of saw teeth evenly distributed around the circumference, and the side wall of the tool body is formed with a plurality of evenly distributed chip grooves; the chip grooves are arranged on one side of the opening close to the saw teeth.

[0006] The tool body is installed on an electric screwdriver or a pneumatic screwdriver through a tool rod. The electric screwdriver or the pneumatic screwdriver drives the tool body to rotate, and the tool body drives the saw teeth to rotate to perform hole drilling on the wood board. The wood chips generated during the hole drilling can be discharged from the chip discharge groove, so there is no need to lift the hole opener multiple times during the hole drilling process. The hole drilling work can be completed in one time, which can effectively improve the hole drilling efficiency.

[0007] At the same time, the area between two adjacent chip grooves is fully serrated. The more serrations there are, the better the cutting efficiency is, and the hole opening efficiency can be further improved.

[0008] The utility model is further configured as follows: the number of the chip removal grooves is 3;

[0009] The number of saw teeth between two adjacent chip removal grooves is a multiple of 3. The width of the opening side of the chip removal groove is the width of one saw tooth.

[0010] Since the chip grooves are cut later, the number of teeth of the hole opener in the full tooth state before cutting the chip grooves is a multiple of 3. After cutting 3 grooves, and each groove occupies the spacing of one tooth, the number of teeth after cutting the grooves is also a multiple of 3. The number of two adjacent chip grooves is the number of teeth after cutting the grooves divided by 3, which is also a multiple of 3, which is convenient for the later punching of the chip grooves.

[0011] The present utility model is further configured such that the chip removal groove is inclined; the opening side of the chip removal groove is inclined in the direction of rotation of the saw teeth during operation, facilitating the discharge of wood chips when the saw teeth cut the wood board.

[0012] The present utility model is further configured such that a flared portion is formed at the inner end of the chip removal groove, which can increase the bottom diameter of the chip removal groove, facilitate the discharge of wood chips, and prevent the blockage of wood chips.

[0013] The present utility model is further configured such that the depth of the chip removal groove is h, and the total height of the tool body is H. The relationship between H and h is: 0.6H < h < 0.8H. When the depth of the chip removal groove reaches a certain depth, the chip removal work can be carried out to the greatest extent while ensuring the strength of the hole opener, ensuring the smooth progress of the chip removal work.

[0014] The present utility model is further configured such that a non-circular shaft hole and a pair of reinforcing plate mounting holes symmetrically arranged with respect to the non-circular shaft hole are formed on the bottom surface of the tool body; the non-circular shaft hole is installed on the tool rod, and the reinforcing plate mounting holes can install the reinforcing plates, thereby improving the strength of the tool body, preventing the tool body from slipping, and extending the service life of the hole opener.

[0015] The outstanding effect of the present utility model is:

[0016] Compared with the prior art, by providing the chip removal groove, the chip removal during the hole opening process can be facilitated, thereby improving the hole opening efficiency;

[0017] By arranging full teeth in the area between adjacent chip removal grooves, the hole opening efficiency can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of an embodiment of the present utility model;

[0019] Figure 2 is a top view of an embodiment of the present utility model;

[0020] Figure 3 is a front view of an embodiment of the present utility model.

[0021] Reference numerals: 10, tool body; 20, saw teeth; 30, chip removal groove; 301, flared portion; 40, non-circular shaft hole; 50, reinforcing plate mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model but are not intended to limit the scope of the present utility model.

[0023] The following will describe Figures 1 to 3 the embodiments of the present utility model:

[0024] A quick-cutting woodworking hole opener, comprising a cutter body 10. The cutter body 10 is in the shape of a cylinder with an open side. At the end of the open side of the cutter body 10, several serrations 20 evenly distributed in a circumference are formed. A plurality of evenly distributed chip discharge grooves 30 are formed on the side wall of the cutter body 10; the chip discharge grooves 30 are arranged with an open side near the serrations 20.

[0025] The number of the chip discharge grooves 30 is 3; the number of serrations 20 between two adjacent chip discharge grooves 30 is a multiple of 3. The width of the open side of the chip discharge groove 30 is the width of one serration 20. During the production process, since the chip discharge grooves are cut later, the number of teeth of the hole opener in the full-tooth state before cutting the chip discharge grooves is a multiple of 3. After cutting 3 grooves, and each groove occupies the pitch of one tooth, therefore, the number of serrations after cutting the grooves is also a multiple of 3. The number of adjacent two chip discharge grooves is the number of serrations after cutting the grooves divided by 3, which is also a multiple of 3, facilitating the punching work of the chip discharge grooves in the later stage.

[0026] The chip discharge grooves 30 are inclined; the open side of the chip discharge grooves 30 is inclined in the direction of rotation of the serrations 20 during work, facilitating the discharge of wood chips when the serrations cut the wood board.

[0027] An enlarged opening part 301 is formed at the inner end of the chip discharge groove 30, which can increase the bottom diameter of the chip discharge groove, facilitating the discharge of wood chips and preventing the blockage of wood chips.

[0028] As Figure 3 shown, the depth of the chip discharge groove 30 in this embodiment is h, and the total height of the cutter body 10 is H. The relationship between H and h is: 0.6H < h < 0.8H. When the depth of the chip discharge groove reaches a certain depth, the chip discharge work can be carried out to the greatest extent on the premise of ensuring the strength of the hole opener, ensuring the smooth progress of the chip discharge work. <l

[0029] As Figure 2 shown, a non-circular shaft hole 40 and a pair of reinforcing plate mounting holes 50 symmetrically arranged with respect to the non-circular shaft hole 40 are formed on the bottom surface of the cutter body 10 in this embodiment; the non-circular shaft hole is installed on the tool rod, and the reinforcing plate mounting holes can install reinforcing plates, thereby improving the strength of the cutter body, avoiding the slipping of the cutter body, and increasing the service life of the hole opener.

[0030] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A quick-cut woodworking hole opener, comprising a tool body (10), wherein the tool body (10) is cylindrical with one side open, and is characterized in that: The open side end of the tool body (10) is formed with a plurality of saw teeth (20) evenly distributed around the circumference, and the side wall of the tool body (10) is formed with a plurality of evenly distributed chip removal grooves (30); the chip removal grooves (30) are arranged at an opening close to one side of the saw teeth (20).

2. The quick-cut woodworking hole opener according to claim 1, characterized in that: The number of the chip removal grooves (30) is 3; The number of saw teeth (20) between two adjacent chip removal grooves (30) is a multiple of 3.

3. The quick-cut woodworking hole opener according to claim 1, characterized in that: The chip removal groove (30) is arranged tilted; the opening side of the chip removal groove (30) is tilted toward the direction in which the saw teeth (20) rotate during operation.

4. The quick-cut woodworking hole opener according to claim 3, characterized in that: The inner end of the chip removal groove (30) is formed with a flared portion (301).

5. The quick-cut woodworking hole opener according to claim 1, characterized in that: The depth of the chip removal groove (30) is h, the total height of the tool body (10) is H, and the relationship between H and h is: 0.6H < h < 0.8H.

6. The quick-cut woodworking hole opener according to claim 1, characterized in that: A non-circular shaft hole (40) and a pair of reinforcing plate mounting holes (50) symmetrically arranged about the non-circular shaft hole (40) are formed on the bottom surface of the tool body (10).

7. The quick-cut woodworking hole opener according to claim 1, characterized in that: The width of the opening side of the chip removal groove (30) is the width of one saw tooth (20).

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