Dual-purpose drill bit for drilling and deburring

Abstract

The utility model relates to the field of drill bits, in particular to a drilling and deburring dual-purpose drill bit which comprises a drill bit body and a deburring blade, and the deburring blade is installed on the drill bit body. When the drilling and deburring dual-purpose drill bit works, the part, close to the end, of the drill bit body can be used for drilling machining operation, the deburring blade installed on the drill bit body can also be used for deburring operation, in the deburring operation, the drill bit body can serve as a fixing and driving base of the deburring blade, and the deburring blade can be used for fixing and driving the deburring blade. Therefore, a mounting base needed by the deburring device is omitted, the two functions of punching and deburring can be achieved at low cost, and the deburring device is small in occupied size and convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of drill bits, in particular to a drill bit for drilling and deburring. Background Art

[0002] In the processing of workpieces, two processing forms are usually included: drilling and deburring. The former usually uses a drill bit. The end of the drill bit is provided with a drill tip for drilling holes, and the root is provided with a connecting shaft rod. The drill bit is connected to the processing machine by the connecting shaft rod, and the drill bit is driven to rotate by the processing machine to form a hole; while the latter grinds the side wall of the workpiece through the cutting of a blade or the friction of sandpaper. For the deburring operation at the pipe mouth of the pipe fitting, sandpaper grinding is time-consuming and labor-intensive, and the effect of blade cutting is better.

[0003] In order to meet the two processing needs of drilling and deburring pipes, there is currently no special tool that can achieve both the drilling and deburring functions. Different tools need to be switched, which is not only troublesome to use, but also large in size and inconvenient to carry. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a dual-purpose drill bit for drilling and deburring, which can realize both the drilling and deburring functions.

[0005] The utility model provides a drill bit for drilling and deburring, comprising a drill bit body and a deburring blade. The deburring blade is arranged on the drill bit body.

[0006] The dual-purpose drill bit for drilling and deburring provided in the present application can, when working, use the part of the drill bit body close to the end for drilling processing operations, and can also use the deburring blade installed on the drill bit body for deburring operations. In the deburring operation, the drill bit body can serve as a fixing and driving base for the deburring blade, thereby eliminating the installation base required for the deburring device, and can achieve both drilling and deburring functions at a relatively low cost, and occupies a small volume and is easy to use.

[0007] Preferably, the drill body and the deburring blade are detachably connected.

[0008] During operation, the deburring blade can be removed to drill holes with larger diameters or deeper holes, thereby expanding the application range of the drill bit; during storage, the deburring blade and the drill bit body can be stored separately, thereby reducing the storage volume and protecting the deburring blade.

[0009] Preferably, a chip groove is provided on the drill body, a blade mounting surface is provided in the chip groove, the side surface of the deburring blade can fit with the blade mounting surface, and the drill body and the deburring blade are fixedly connected by a fastener.

[0010] The chip groove is relatively large in size, and its edge connected to the cutting surface of the drill body can be used as a cutting edge to enlarge the drill hole. The waste chips removed can be discharged through the chip groove. A blade mounting surface is provided in the chip groove to fix the deburring blade. The same structure is used to perform multiple functions, which can simplify the structural design of the drill body.

[0011] Preferably, at least two fastening holes are provided on the blade mounting surface, and fasteners cooperate with the fastening holes to fix the deburring blade, and the fasteners are screws or bolts.

[0012] Convenient for fixed installation and disassembly, and can easily install deburring blades of different specifications and replace deburring blades

[0013] Preferably, the number of the deburring blades is at least two, and all the deburring blades are distributed along the circumference of the drill body.

[0014] At least two circumferentially arranged deburring blades can maintain the center of gravity of the drill body stable.

[0015] Preferably, a cutting recess is provided on the deburring blade, the cutting recess is protruding from the cutting surface of the drill body, and the opening of the cutting recess faces the end of the drill body.

[0016] During operation, the pipe wall at the end of the processed pipe fitting is inserted into the cutting notch, and the burrs thereon can be polished by the relative friction movement between the cutting notch and the pipe wall, thereby achieving the deburring effect.

[0017] Preferably, the cutting recess includes a first cutting side close to the drill body and a second cutting side away from the drill body, the first cutting side is tilted relative to the rotation center axis of the drill body, and the second cutting side forms an acute angle with respect to the first cutting side.

[0018] The above design enables the first cutting side and the second cutting side of the cutting notch to be respectively connected to the inner wall and the outer wall of the processed pipe, thereby simultaneously performing a deburring operation on the inner wall and the outer wall of the processed pipe.

[0019] Preferably, an end of the first cutting side away from the second cutting side extends to the cutting surface of the drill body.

[0020] When the drill body is inserted into the pipe opening of the processed pipe fitting, the pipe wall of the processed pipe fitting can smoothly enter the cutting notch.

[0021] Preferably, the drill body comprises at least two drilling units distributed in a stepped manner, and the cutting surfaces of different drilling units have different distances relative to the rotation center axis of the drill body.

[0022] It can be used to form holes of different diameters to meet the needs of multi-diameter drilling.

[0023] Preferably, in the direction from the root to the end of the drill body, the deburring blade includes at least two step surfaces distributed in a stepped manner, the step surfaces are arranged corresponding to the drilling units, and the cutting recess is located between two adjacent step surfaces; the distance D1 of the step surface relative to the rotation center axis of the drill body is equal to or less than the distance D2 of the cutting surface of the upper-level drilling unit close to the root of the drill body relative to the rotation center axis of the drill body.

[0024] It can be used to grind pipes with different hole diameters to expand the scope of use. The upper level refers to the upper step close to the root of the drill body.

[0025] Preferably, a transition slope is provided between the cutting surfaces of two adjacent drilling units.

[0026] The transition slope plays a role of connection and transition, and can smoothly expand a small-diameter hole to a large-diameter hole during the drilling process, which is beneficial to improving the drilling quality and reducing the drilling risk.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The dual-purpose drill bit for drilling and deburring provided in the present application can, when working, use the part of the drill bit body close to the end for drilling processing operations, and can also use the deburring blade installed on the drill bit body for deburring operations. In the deburring operation, the drill bit body can serve as a fixing and driving base for the deburring blade, thereby eliminating the installation base required for the deburring device, and can achieve both drilling and deburring functions at a relatively low cost, and occupies a small volume and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the dual-purpose drill bit for drilling and deburring of the utility model;

[0030] Figure 2 This is a front view of the dual-purpose drill bit for drilling and deburring of the utility model;

[0031] Figure 3 It is a side view of the dual-purpose drill bit for drilling and deburring of the utility model;

[0032] Figure 4 A top view of the dual-purpose drill bit for drilling and deburring of the utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the deburring blade of the utility model;

[0034] Figure 6 for Figure 5 Detailed drawing of middle section A;

[0035] Figure 7 It is a cutting schematic diagram of the deburring blade of the utility model.

[0036] Markings in the figure:

[0037] 1- drill body;

[0038] 11-chip groove;

[0039] 111-blade mounting surface; 112-fastener;

[0040] 12- drilling unit;

[0041] 121-cutting surface; 122-transition slope;

[0042] 13-drill tip;

[0043] 14-connecting part;

[0044] 15-rotating center axis;

[0045] 2- Deburring blade;

[0046] 21- cutting notch;

[0047] 211 - first cutting side; 212 - second cutting side; 213 - recessed portion;

[0048] 22- step surface;

[0049] 3-Processed pipe fittings. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0051] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0052] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0053] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0054] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0055] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0056] Example 1

[0057] This embodiment provides a dual-purpose drill bit for drilling and deburring, see Figure 1-7 , comprising a drill body 1 and a deburring blade 2, wherein the deburring blade 2 is mounted on the drill body 1.

[0058] The drill body 1 has an annular or arc-shaped cutting surface 121, which can rotate around the rotating center axis 15 of the drill body 1 for cutting or grinding holes. The distance of the cutting surface 121 relative to the rotating center axis 15 of the drill body 1 can gradually increase toward the root direction of the drill body 1 to form holes of different diameters; a drill tip 13 can be provided at the end of the drill body 1 for auxiliary drilling, and a connecting portion 14 can be provided at the root for connecting with a processing machine.

[0059] The deburring blade 2 is a blade-like structure having a cutting edge thereon for cutting and grinding burrs on the surface of the workpiece; the number of the deburring blades 2 can be one or more, and multiple deburring blades 2 arranged circumferentially along the rotating center axis 15 of the drill body 1 can maintain the center of gravity of the drill body 1 near the rotating center axis 15, reduce the eccentricity of the overall structure, and make the drill body 1 rotate more smoothly; multiple deburring blades 2 can also reduce the number of revolutions required when grinding the pipe mouth, which is conducive to improving work efficiency.

[0060] Preferably, the number of the deburring blades 2 is two, and they are arranged circumferentially along the central axis of rotation 15 of the drill body 1 .

[0061] When drilling, the drill body 1 is mounted on a processing machine via the connection portion 14, and the connection portion 14 is driven to rotate manually or electrically, thereby driving the drill body 1 to rotate, and the end of the drill body 1 in the rotating state is brought close to and squeezed against the workpiece, so that a hole can be drilled in the workpiece.

[0062] When deburring, the drill body 1 is moved so that the edge of the deburring blade 2 is close to the side wall surface of the workpiece. The drill body 1 is rotated or moved to grind the burrs on the workpiece through the relative movement of the edge and the workpiece, thereby achieving the deburring effect.

[0063] The present application provides a dual-purpose drill bit for drilling and deburring, in which the drill body 1 can serve as a fixing and driving base for the deburring blade 2, thereby eliminating the need for an installation base required for the deburring device, and can achieve both drilling and deburring functions at a relatively low cost, and occupies a small volume and is easy to use.

[0064] In one or more embodiments, the drill body 1 and the deburring blade 2 are detachably connected. During operation, the deburring blade can be removed to drill holes with larger diameters or deeper holes, thereby expanding the application range of the drill bit; during storage, the deburring blade and the drill body can be stored separately, thereby reducing the storage volume and protecting the deburring blade.

[0065] Preferably, a chip groove 11 is provided on the drill body 1 , and a blade mounting surface 111 is provided in the chip groove 11 . The side surface of the deburring blade 2 can fit with the blade mounting surface 111 , and the drill body 1 and the deburring blade 2 are fixedly connected by a fastener 112 .

[0066] See also Figure 1-3 The chip groove 11 is a groove-shaped structure opened on the cutting surface 121 of the drill body 1, and the number of the grooves can be one or more; the chip groove 11 can be extended along the length direction of the drill body 1. Due to its relatively large size, a blade mounting surface 111 can be set inside it to fix the deburring blade 2. The fixing method can be a detachable connection method such as a snap connection, a bolt connection, and a glue connection; the edge where the chip groove 11 connects to the cutting surface 121 of the drill body 1 can be used as a cutting edge for enlarging the drill hole, and the waste chips cut off can be discharged along the extension direction of the chip groove 11.

[0067] The blade mounting surface 111 is a flat or curved structure, and the side surface of the deburring blade 2 can be fitted with the blade mounting surface 111 to support and fix the deburring blade 2, thereby reducing the probability of the deburring blade 2 shaking, loosening, breaking or being damaged during operation.

[0068] Preferably, the deburring blade 2 and the drill body 1 can be fixed by a fastener 112, and the fastener 112 can be selected as a screw, a bolt, etc.; at least two fastening holes can be opened on the blade mounting surface 111, and at least two openings are correspondingly set on the deburring blade 2, and the fastener 112 passes through the openings and the fastening holes on the deburring blade 2 in sequence, so as to fasten the deburring blade 2 to the blade mounting surface 111; the above-mentioned fixing method can conveniently disassemble and install the deburring blade 2.

[0069] The fastening hole can be a through hole with both ends open, or one end open and the other end closed.

[0070] If the fastener 112 is a screw, a thread may be provided on at least part of the inner circumference of the fastening hole, and the screw and the fastening hole thread cooperate; if the fastener 112 is a bolt, the bolt may be fastened by a nut after passing through the fastening hole.

[0071] In this embodiment, a side abutment surface which is perpendicular or approximately perpendicular to the blade mounting surface 111 is provided in the chip removal groove 11 , and the deburring blade 2 can abut against the side abutment surface to improve the fixing effect.

[0072] In one or more embodiments, a cutting recess 21 is provided on the deburring blade 2, and the cutting recess 21 is provided protruding from the cutting surface 121 of the drill body 1, and the opening of the cutting recess 21 faces the end of the drill body 1, and the cutting recess 21 is spaced apart from the end of the drill body 1.

[0073] See also Figure 5-7 The cutting notch 21 is a concave structure. During operation, the pipe wall at the end of the pipe 3 to be processed is inserted into the cutting notch 21. The burrs on the pipe wall can be polished by the relative friction between the cutting notch 21 and the pipe wall, thereby achieving a deburring effect.

[0074] The end of the drill body 1 refers to the end that first extends into the drill hole during the drilling operation. The end may be provided with a drill tip 13, and the end away from the end is the root. The root of the drill body 1 may be connected to the connecting portion 14. When the deburring blade 2 is mounted on the drill body 1, the portion between the cutting notch 21 and the end may be used for drilling.

[0075] The cutting recess 21 includes a recess 213 and a first cutting side 211 and a second cutting side 212 distributed on both sides of the recess 213, wherein the first cutting side 211 is close to the drill body 1, and the second cutting side 212 is away from the drill body 1, the first cutting side 211 is inclined relative to the rotating center axis 15 of the drill body 1, and the second cutting side 212 forms an acute angle relative to the first cutting side 211.

[0076] The above-mentioned setting method makes the diameter of the cutting recess 21 gradually decrease towards the direction approaching the recess 213, and the tube wall of the processed pipe 3 extends into the cutting recess 21. The two sides of the tube wall can respectively abut against the first cutting side 211 and the second cutting side 212. By rotating or moving the drill body 1, the inner wall and the outer wall of the processed pipe 3 can be deburred at the same time.

[0077] Preferably, one end of the first cutting side 211 away from the second cutting side 212 extends to the cutting surface 121 of the drill body 1; that is, there is no height difference between the end of the first cutting side 211 away from the recess 213 and the cutting surface 121, so that when the drill body 1 is inserted into the pipe mouth of the processed pipe 3, the pipe wall of the processed pipe 3 can smoothly enter the cutting recess 21.

[0078] Example 2

[0079] The present embodiment provides a dual-purpose drill bit for drilling and deburring, which is different from the embodiment 1 in that, in the direction from the root to the end of the drill bit body 1, the drill bit body 1 includes at least two drilling units 12 distributed in a stepped manner, and the cutting surfaces 121 of different drilling units 12 have different distances relative to the rotating center axis 15 of the drill bit body 1.

[0080] The drill body 1 described in this embodiment is a step drill, and can form drill holes of different diameters by drilling units 12 with different cutting surface 121 distances to meet the needs of drilling holes of various specifications; the distances of the cutting surfaces 121 of different drilling units 12 relative to the rotating center axis 15 of the drill body 1 increase successively in the direction away from the end, that is, the cutting surfaces 121 of the drilling units 12 close to the end have a smaller distance, and the cutting surfaces 121 of the drilling units 12 close to the root have a larger distance.

[0081] In the direction from the root to the end of the drill body 1 , the deburring blade 2 includes at least two step surfaces 22 distributed in a stepped manner, the step surfaces 22 are arranged corresponding to the drilling units 12 , and the cutting notch 21 is located between two adjacent step surfaces 22 .

[0082] The step surface 22 is located on one side of the protruding cutting surface 121 of the deburring blade 2, and the step surface 22 can be substantially parallel to the rotary center axis 15 of the drill body 1, and a cutting notch 21 is provided between two adjacent step surfaces 22. The step surface 22 is provided corresponding to the drilling unit 12, so that the cutting notch 21 is located outside the cutting surface 121 of part of the drilling unit 12, and in order to facilitate the arrangement of the cutting notch 21, the drilling unit 12 with the cutting notch 21 on the outside can be extended.

[0083] In order to enable the deburring blade 2 to perform drilling operations when installed on the drill body 1, one or more drilling units 12 near the end of the drill body 1 can be left without a cutting notch 21; more specifically, the deburring blade 2 does not extend out of the cutting surface 121 of the one or more drilling units 12 near the end of the drill body 1.

[0084] See also Figure 2 In order to ensure that the portion of the deburring blade 2 protruding from the cutting surface 121 does not hinder the drilling unit 12 from extending into the processed pipe 3, the distance D1 of the step surface 22 relative to the rotation center axis 15 of the drill body 1 is equal to or less than the distance D2 of the cutting surface 121 of the upper-level drilling unit 12 near the root of the drill body 1 relative to the rotation center axis 15 of the drill body 1, that is, D1≤D2.

[0085] Preferably, a transition slope 122 is provided between the cutting surfaces 121 of two adjacent drilling units 12. The transition slope 122 plays a role of connection and transition, and can smoothly expand a small diameter drill hole into a large diameter drill hole during the drilling process, which is beneficial to improving the drilling quality and reducing the drilling risk.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drill bit for drilling and deburring, characterized in that: It comprises a drill body (1) and a deburring blade (2), wherein the deburring blade (2) is mounted on the drill body (1); The drill body (1) is provided with a chip removal groove (11), the chip removal groove (11) has a blade mounting surface (111), the side surface of the deburring blade (2) can fit with the blade mounting surface (111), and the drill body (1) and the deburring blade (2) are fixedly connected via a fastener (112).

2. A dual-purpose drill bit for drilling and deburring according to claim 1, characterized in that: The drill body (1) is detachably connected to the deburring blade (2).

3. A dual-purpose drill bit for drilling and deburring according to claim 1, characterized in that: At least two fastening holes are provided on the blade mounting surface (111); the fastening piece (112) cooperates with the fastening holes to fix the deburring blade (2); the fastening piece (112) is a screw or a bolt.

4. A dual-purpose drill bit for drilling and deburring according to claim 1, characterized in that: The number of the deburring blades (2) is at least two, and all the deburring blades (2) are distributed along the circumference of the drill body (1).

5. A drill bit for drilling and deburring according to any one of claims 1 to 4, characterized in that: The deburring blade (2) is provided with a cutting recess (21), the cutting recess (21) is arranged to protrude from the cutting surface (121) of the drill body (1), and the opening of the cutting recess (21) faces the end of the drill body (1).

6. A drill bit for drilling and deburring according to claim 5, characterized in that: The cutting recess (21) comprises a first cutting side (211) close to the drill body (1), and a second cutting side (212) away from the drill body (1), the first cutting side (211) being arranged obliquely relative to the rotary center axis (15) of the drill body (1), and the second cutting side (212) forming an acute angle relative to the first cutting side (211).

7. A dual-purpose drill bit for drilling and deburring according to claim 6, characterized in that: An end of the first cutting side (211) away from the second cutting side (212) extends to a cutting surface (121) of the drill body (1).

8. A drill bit for drilling and deburring according to claim 5, characterized in that: The drill body (1) comprises at least two drilling units (12) distributed in a stepped manner, and the cutting surfaces (121) of different drilling units (12) have different distances relative to the central axis of rotation (15) of the drill body (1).

9. A dual-purpose drill bit for drilling and deburring according to claim 8, characterized in that: In the direction from the root to the end of the drill body (1), the deburring blade (2) comprises at least two step surfaces (22) distributed in a stepped manner, the step surfaces (22) being arranged corresponding to the drilling unit (12), and the cutting recess (21) being located between two adjacent step surfaces (22); a distance D1 between the step surface (22) and the central axis of rotation (15) of the drill body (1) is equal to or less than a distance D2 between the cutting surface (121) of the upper drilling unit (12) close to the root of the drill body (1) and the central axis of rotation (15) of the drill body (1).

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