Three-edge flat drill

Abstract

The utility model discloses a three-edge flat drill which comprises a drill handle and a flat cutter arranged on the drill handle, a positioning drill is arranged on the upper end face of the flat cutter, the flat cutter comprises a plurality of blades integrally formed with the drill handle, and chip grooves for chip removal are formed among the blades. One sides of the blades are mutually concentrated, the positioning drill is arranged at the central point of the mutually concentrated blades, an upper edge knife is arranged on the outer side of the upper end face of each blade, the included angle between each upper edge knife and the upper end face of the blade is 100-140 degrees, and the edge face of each upper edge knife is inclined. On the basis that the design is reasonable and the structure is simple, drilling and cutting can be better carried out to the maximum extent, and the requirement of a user for improving the drilling efficiency can be better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to flat drill technology field especially relates to a three blade flat drill. BACKGROUND

[0002] Known flat drill is generally the tool that woodwork carries out drilling to board and so on material, usually is used to process the hole that precision requirement is not high and needs to pass through the thin plate, such as the Chinese utility model patent for a kind of three blade drill bit disclosed in authorized announcement No. SUMMARY

[0003] (I) technical problems to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a three blade flat drill, which can better drill and cut to the greatest extent while keeping reasonable design and simple structure, and is more conducive to meeting the requirements of users to improve drilling efficiency.

[0005] (II) technical solutions to be adopted

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A three blade flat drill, including drill handle and flat knife arranged on the drill handle, the upper end surface of the flat knife is provided with a positioning drill, the flat knife includes a plurality of blades integrally formed with the drill handle, a plurality of the blades form a chip removal groove for chip removal, a plurality of the blades are concentrated on one side, and the positioning drill is arranged at the center point of the concentrated blades, the upper end surface of each blade is provided with an upper blade, the angle between the upper blade and the blade upper end surface is 100°-140°, and the blade surface of the upper blade is inclined.

[0008] Preferably, the plurality of blades are three.

[0009] Preferably, each blade is provided with an arc-shaped groove on one side of the upper part.

[0010] Preferably, each of the blade outer side surfaces is arranged with cutting edges uniformly along the axial direction of the drill shank, and the cross section of each of the cutting edges is triangular.

[0011] Preferably, the positioning drill is a triangular pyramid or a conical drill with external threads.

[0012] Preferably, the drill shank comprises a hexagonal shank and a round rod integrally formed with the hexagonal shank, and at least one groove is arranged on the hexagonal shank.

[0013] (Three) technical effects to be achieved

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] Firstly, the flat knife comprises a plurality of blades integrally formed with a drill shank, a plurality of blades form a chip removal groove for chip removal, a plurality of blades are concentrated on one side, a positioning drill is arranged at the central point of the concentrated blades, an upper blade is arranged on the outer side of the upper end surface of each blade, the included angle between the upper blade and the upper end surface is 100°-140°, and the blade surface of the upper blade is inclined, which can better perform drilling and cutting to the greatest extent, is more conducive to meeting the requirement of users for improving drilling efficiency, and has reasonable design and simple structure.

[0016] Secondly, each of the blade outer side surfaces is arranged with cutting edges uniformly along the axial direction of the drill shank, and the cross section of each of the cutting edges is triangular, which is reasonable, simple in structure, convenient for production and manufacture, more conducive to cutting a deep hole, higher in drilling efficiency, conducive to chip removal and heat dissipation, and more capable of meeting the use requirement. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is a whole schematic view of the utility model.

[0019] Figure 3 It is Figure 2 It is a local enlarged schematic view of A in the middle.

[0020] Figure 4 It is a first embodiment schematic view of the drill shank with two grooves of the utility model.

[0021] Figure 5 It is a first embodiment schematic view of the drill shank with one groove of the utility model.

[0022] Figure 6 It is a second embodiment schematic view of the drill shank with one groove of the utility model.

[0023] Figure 7 Figure 2 is a schematic view of a drill shank with two grooves according to the second embodiment of the present application.

[0024] Figure 8 Figure 3 is a schematic view of a drill shank with two grooves according to the third embodiment of the present application.

[0025] In the figure: 1, drill shank; 2, flat knife; 3, positioning drill; 11, hexagonal shank; 12, round rod; 21, blade; 22, chip removal groove; 23, upper blade; 111, groove; 211, arc-shaped groove; 212, cutting edge. DETAILED DESCRIPTION

[0026] In the description of the present application, it should be noted that when an element is referred to as being "fixedly connected" or "disposed" to another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In the description of the present application, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise explicitly specified and limited. "Several" means one or more, unless otherwise explicitly specified and limited.

[0028] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "disposed", "mounted", "connected", "linked", and the like should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected; can be directly connected, or indirectly connected through an intermediate medium; can be connected internally between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below through the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0030] Embodiment one: refer to Figures 1 to 8 A three-blade flat drill includes a drill handle 1 and a flat blade 2 arranged on the drill handle 1, and a positioning drill 3 is arranged on the upper end surface of the flat blade 2. The flat blade 2 includes a plurality of blades 21 which are integrally formed with the drill handle 1. A chip removal groove 22 is formed between the plurality of blades 21 for chip removal. The plurality of blades 21 are concentrated on one side. The positioning drill 3 is arranged at the center point of the plurality of blades 21. An upper blade 23 is arranged on the outer side of the upper end surface of each blade 21. The angle between the upper blade 23 and the upper end surface of the blade 21 is 100°-140°. On the basis of reasonable design and simple structure, the flat drill can better perform drilling and cutting to the greatest extent, which is more conducive to meeting the user's requirement of improving drilling efficiency. The blade surface of the upper blade 23 is inclined, which is more conducive to cutting and better meets the user's use requirement. In the embodiment, the plurality of blades 21 are three, which is more conducive to cutting and has better stability.

[0031] Embodiment two: can be based on embodiment one, as shown in Figures 1 to 8 Each blade 21 is provided with an arc-shaped groove 211 on one side of the upper portion, which is conducive to cutting and chip removal.

[0032] Embodiment three: can be based on embodiment one or embodiment two, as shown in Figure 5 , Figure 6 , Figure 7 and Figure 8 Each cutting edge 212 is arranged on the outer side surface of each blade 21 along the axial direction of the drill handle 1, and the cross section of each cutting edge 212 is triangular in shape, which is conducive to cutting and chip removal of deep holes and also conducive to good heat dissipation, greatly improving the service life.

[0033] Embodiment four: can be based on embodiment one or embodiment two or embodiment three, as shown in Figures 1 to 8 The positioning drill 3 is a triangular pyramid or a conical shape with external threads, which has various types and more selection options, and is more conducive to rapid positioning and shallow hole cutting.

[0034] Embodiment five: can be based on embodiment one or embodiment two or embodiment three or embodiment four, as shown in Figures 1 to 8As shown, the drill handle 1 comprises a hexagonal handle 11 and a round rod 12 integrally formed with the hexagonal handle 11, which is more firm in structure and convenient for production and manufacture, and at least one groove 111 is arranged on the hexagonal handle 11, which is convenient for mounting and dismounting with the outside and can more meet the use requirements. In the embodiment, one or two grooves 111 are adopted, which are various in type and have large selection space.

[0035] The standard parts used in the application file can be purchased from the market, and the specific connection mode of each part adopts the conventional means such as bolts and rivets in the prior art, which will not be described in detail here.

[0036] It should be noted that although the above embodiments have been described in the present text, the patent protection scope of the utility model is not limited thereby. Therefore, based on the innovative concept of the utility model, the changes and modifications of the embodiments described in the present text, or the equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, which are all included in the protection scope of the utility model patent.

Claims

1. A three-fluted flat drill comprising a shank (1) and a flat bit (2) provided on the shank (1), the flat bit (2) being provided with a pilot drill (3) on the upper end surface, characterized in that: The flat knife (2) comprises a plurality of blades (21) which are integrally formed with the drill handle (1), a plurality of chip removal grooves (22) are formed between the blades (21) for chip removal, the blades (21) are concentrated on one side, the positioning drill (3) is arranged at the center point of the concentrated blades (21), the outer side of the upper end surface of each blade (21) is provided with an upper blade (23), the angle between the upper blade (23) and the upper end surface of the blade (21) is 100°-140°, and the blade surface of the upper blade (23) is inclined.

2. The three-lip flat end mill according to claim 1, wherein: The number of the blades (21) is three.

3. The three-lip flat end mill according to claim 1, wherein: An arc-shaped groove (211) is arranged on one side of the upper part of each blade (21).

4. A three-lip flat end mill according to claim 1 or 2 or 3, characterized in that: Cutting edges (212) are arranged on the outer side of each blade (21) along the axial direction of the drill handle (1), and the cross section of each cutting edge (212) is triangular.

5. A three-lip flat end mill according to claim 1 or 2 or 3 wherein: The positioning drill (3) is a triangular pyramid or a conical with external threads.

6. The tri-edged flat end mill according to claim 1 or 2 or 3, wherein: The drill handle (1) comprises a hexagonal handle (11) and a round rod (12) which is integrally formed with the hexagonal handle (11), and at least one groove (111) is arranged above the hexagonal handle (11).

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