CN213674575U

CN213674575U - Novel three-edge woodworking step drill

Info

Publication number: CN213674575U
Application number: CN202022047176.6U
Authority: CN
Inventors: 尹华水; 舒婷莎; 王光兵
Original assignee: Sichuan Yibi Equipment Co ltd; Chengdu Bangpu Cutting Tools Co ltd
Current assignee: Sichuan Yibi Equipment Co ltd; Chengdu Bangpu Cutting Tools Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-07-13
Anticipated expiration: 2030-09-17

Abstract

The utility model discloses a novel three sword carpenter step bores, including clamping part, one-level cutting portion, second grade cutting portion. The first-stage cutting part and the second-stage cutting part are respectively arranged along the top end of the clamping part, the diameter of the second-stage cutting part is larger than that of the first-stage cutting part, three side edges are uniformly arranged on the periphery of the top end of the first-stage cutting part, a central positioning point is arranged in the center of the first-stage cutting part, the three side edges play a more stable support in the cutting process, three cross edges are arranged between the side edges and the central point, and the cutting resistance and the size of waste chips are effectively reduced under the condition that the three cross edges have the same cutting parameters; three spiral cutting grooves are arranged to achieve efficient cutting, waste chip congestion is avoided, and cutting temperature is reduced. The utility model discloses can provide a location support better, reduce cutting resistance, arrange and cut more smooth three-edged carpenter's step and bore, can effectively improve cylindricity and the surface finish by the machined hole to and improve cutter life under the same machining parameter condition.

Description

Novel three-edge woodworking step drill

Technical Field

The utility model relates to a drill bit technical field especially relates to a novel three-blade carpenter step bore.

Background

The wood processing is processing which takes wood as raw material and is mainly carried out by a mechanical or chemical method, and the product still keeps the basic characteristics of the wood; in the field of wood or mechanical processing, a drill is often used for drilling a hole on a product. When a product is bored, a hole to be bored is sometimes a stepped hole such as a counter bore. The traditional processing mode is that a through hole is formed on the surface of a workpiece, a blind hole is formed on the surface of the workpiece, or a blind hole with a larger diameter is formed on the surface of the workpiece, and a through hole with a smaller diameter is formed in the blind hole, so that a counter bore or a stepped hole is formed.

However, the above-mentioned processing method of the stepped hole not only has many processing procedures, which affects the processing efficiency, but also may cause the positioning accuracy of the front and rear hole processing to be decreased, which affects the product quality, and the drill bit drives the drill bit to rotate at the initial stage, because the drill bit is installed with an error, the drill bit and the clamping part will be worn due to impact at the initial stage of rotation, and the accuracy of the drilling is affected due to long-term wear.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the novel three-edge woodworking step drill capable of reducing cutting resistance is provided in order to solve the problems of concentricity of a stepped hole, rapid abrasion of a traditional drill and poor surface quality.

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

a novel three-edge woodworking step drill comprises a clamping part, a primary cutting part and a secondary cutting part; the primary cutting part and the secondary cutting part are respectively arranged along the top end of the clamping part, and the diameter of the secondary cutting part is larger than that of the primary cutting part; the clamping part comprises a clamping column, and the bottom of the clamping column is provided with a bottom chamfer; the upper part of the clamping column is provided with a tool withdrawal groove, the upper part of the tool withdrawal groove is provided with a universal cylinder, and a connecting conical surface is arranged between the universal cylinder and the secondary cutting part; the first-stage cutting part comprises three second side edges uniformly arranged on the periphery of the top end, a central positioning point is arranged in the center, a second chisel edge is arranged between each second side edge and the central positioning point, a second spiral cutting edge is arranged at the end part of each second side edge along the axis direction, a second cylindrical guide surface is arranged along each second spiral cutting edge, a second clearance avoiding surface is arranged along the axis direction of each second cylindrical guide surface, and a second row of cutting grooves along the second spiral cutting edges are formed between the second cylindrical guide surfaces; the second grade cutting portion includes that the top is peripheral evenly to be provided with three first limit sword, is equipped with first chisel edge between the second clearance face of first limit sword and one-level cutting portion, and every first limit sword tip is equipped with first spiral cutting edge along the axis direction, is equipped with first cylinder spigot surface along first spiral cutting edge, is equipped with first clearance face along first cylinder spigot surface axis direction, is equipped with the first row who follows first spiral cutting edge between the first cylinder spigot surface and cuts the groove.

As a further description of the above technical solution:

the diameter of the second cylindrical guide surface of the primary cutting part is smaller than that of the first cylindrical guide surface of the secondary cutting part.

As a further description of the above technical solution:

the second row of cutting grooves and the first row of cutting grooves are spiral grooves in the same spiral direction.

As a further description of the above technical solution:

the primary cutting part and the secondary cutting part are made of hard alloy or metal ceramic.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

the method can provide a solution scheme with better positioning support, reduced cutting resistance and smoother row cutting, can effectively improve the cylindricity and surface smoothness of the processed hole, and prolongs the service life of the cutter under the condition of the same processing parameters.

Drawings

Fig. 1 is a perspective view of an overall structure provided according to an embodiment of the present invention;

fig. 2 shows a front view provided according to an embodiment of the present invention;

fig. 3 shows a top view provided in accordance with an embodiment of the present invention;

fig. 4 shows a left side view provided in accordance with an embodiment of the present invention;

fig. 5 shows a cross-sectional a-a view provided in accordance with an embodiment of the present invention;

fig. 6 shows a B-B cross-sectional view provided in accordance with an embodiment of the present invention;

figure 7 shows a partial enlarged view of a knife tip provided in accordance with an embodiment of the present invention.

Illustration of the drawings:

1. a clamping portion; 2. a secondary cutting portion; 3. a primary cutting portion; 11. a clamping post; 12. chamfering the bottom surface; 13. a tool withdrawal groove; 14. a universal cylinder; 15. a connecting conical surface; 21. a first edge; 22. a first chisel edge; 23. a first helical cutting edge; 24. a first cylindrical guide surface; 25. a first void-avoiding surface; 26. a first row of cutting grooves; 31. a second edge, 32, a central locating point; 33. a second chisel edge; 34. a second helical cutting edge; 35. a second cylindrical guide surface; 36. a second void-avoiding surface; 37. the second row of cutting grooves.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a novel three-edge woodworking step drill comprises a clamping part 1, a first-stage cutting part 3 and a second-stage cutting part 2; the primary cutting part 3 and the secondary cutting part 2 are respectively arranged along the top end of the clamping part 1, and the diameter of the secondary cutting part 2 is larger than that of the primary cutting part 3; the clamping part 1 comprises a clamping column 11, and the bottom of the clamping column 11 is provided with a bottom chamfer 12; the upper part of the clamping column 11 is provided with a tool withdrawal groove 13, the upper part of the tool withdrawal groove 13 is provided with a universal cylinder 14, and a connecting conical surface 15 is arranged between the universal cylinder 14 and the secondary cutting part 2; the primary cutting part 3 comprises three second side edges 31 uniformly arranged on the periphery of the top end, a central positioning tip 32 is arranged in the center, a second chisel edge 33 is arranged between the second side edges 31 and the central positioning tip 32, a second spiral cutting edge 34 is arranged at the end part of each second side edge along the axial direction, a second cylindrical guide surface 35 is arranged along the second spiral cutting edge 34, a second clearance surface 36 is arranged along the axial direction of the second cylindrical guide surface 35, and a second row of cutting grooves 37 along the second spiral cutting edge 34 are arranged between the second cylindrical guide surfaces 35; two-stage cutting portion 2 includes that the top is peripheral evenly to be provided with three first limit sword 21, is equipped with first chisel edge 22 between the second clearance surface 36 of first limit sword 21 and one-level cutting portion, and every first limit sword tip is equipped with first spiral cutting edge 23 along the axis direction, is equipped with first cylinder spigot surface 24 along first spiral cutting edge 23, is equipped with first clearance surface 25 along 24 axis directions of first cylinder spigot surface, is equipped with the first row along first spiral cutting edge 23 between the first cylinder spigot surface 24 and cuts groove 26.

The universal cylinder is arranged to be capable of being made into three-edge step drills with different sizes by the same base body and the same clamping.

The diameter of the second cylindrical guide surface 35 of the primary cutting portion is smaller than the diameter of the first cylindrical guide surface 24 of the secondary cutting portion.

The working principle is as follows: during the use, this application three sword carpenter step bores and adopts three first limit sword, second limit sword and three first row cutting grooves, the second row cutting groove, can provide a location and support better, reduce the cutting resistance, arrange and cut more smooth solution, this application structure is except that central point location is sharp, the limit sword adopts three limit sword, in geometry promptly, three point location is the most stable, a cutting edge has been increased simultaneously, compare original structure, under the same cutting parameter condition, the volume of eating the sword has been reduced, and the cutting resistance, the cutter is difficult to the beat, the cylindricity in hole, the smooth finish is better, the reduction of cutting helping hand, it is more smooth and easy to arrange and cut, make the cutter intensification slower, the time of cutter inefficacy has been reduced, the cutter life has been improved promptly. The method can effectively improve the cylindricity and the surface smoothness of the processed hole and prolong the service life of the cutter under the condition of the same processing parameters. In the application, the diameter of the second cylindrical guide surface 35 of the primary cutting part is preferably smaller than that of the first cylindrical guide surface 24 of the secondary cutting part, and the structure can form concentric step holes with different diameters in one drilling process.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. A novel three-edge woodworking step drill is characterized by comprising a clamping part (1), a primary cutting part (3) and a secondary cutting part (2); the primary cutting part (3) and the secondary cutting part (2) are respectively arranged along the top end of the clamping part (1), and the diameter of the secondary cutting part (2) is larger than that of the primary cutting part (3); the clamping part (1) comprises a clamping column (11), and the bottom of the clamping column (11) is provided with a bottom chamfer (12); a tool withdrawal groove (13) is formed in the upper portion of the clamping column (11), a universal cylinder (14) is arranged on the upper portion of the tool withdrawal groove (13), and a connecting conical surface (15) is arranged between the universal cylinder (14) and the secondary cutting portion (2);

the primary cutting part (3) comprises three second side edges (31) uniformly arranged on the periphery of the top end, a central positioning point (32) is arranged in the center, a second cross edge (33) is arranged between each second side edge (31) and the central positioning point (32), a second spiral cutting edge (34) is arranged at the end part of each second side edge along the axis direction, a second cylindrical guide surface (35) is arranged along the second spiral cutting edge (34), a second clearance surface (36) is arranged along the axis direction of the second cylindrical guide surface (35), and a second row of cutting grooves (37) along the second spiral cutting edges (34) are arranged between the second cylindrical guide surfaces (35); two-stage cutting portion (2) are including the top periphery evenly set up three first limit sword (21), first limit sword (21) and the second of one-level cutting portion are kept away and are equipped with first chisel edge (22) between face (36), every first limit sword tip is equipped with first spiral cutting edge (23) along the axis direction, be equipped with first cylinder spigot surface (24) along first spiral cutting edge (23), be equipped with first face (25) of keeping away along first cylinder spigot surface (24) axis direction, be equipped with between first cylinder spigot surface (24) along first spiral cutting edge (23) first row cut groove (26).

2. A novel three-edge woodworking step drill as claimed in claim 1, wherein: the diameter of the second cylindrical guide surface (35) of the primary cutting portion is smaller than the diameter of the first cylindrical guide surface (24) of the secondary cutting portion.

3. A novel three-edge woodworking step drill as claimed in claim 1, wherein: the second row of cutting grooves and the first row of cutting grooves are spiral grooves in the same spiral direction.

4. A novel three-edge woodworking step drill as claimed in claim 1, wherein: the primary cutting part and the secondary cutting part are made of hard alloy or metal ceramic.