Multipurpose combined drill bit

Abstract

The utility model discloses a multipurpose combined drill bit, which comprises a cutter body, a first cutting edge and a second cutting edge, is manufactured by welding and linear cutting processes, can finish aperture machining, orifice front chamfering and orifice back chamfering at one time, obviously improves the machining efficiency, reduces the cutter cost, and only occupies one equipment cutter location.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling tool technical field, concretely is a multipurpose combined drill. BACKGROUND

[0002] In the field of mechanical processing, drilling is a common processing technology. Traditional drilling usually needs to use multiple cutters, such as first drilling with a drill bit and then chamfering the hole mouth with a chamfering cutter. This method has the following disadvantages:

[0003] Low processing efficiency: multiple cutter changes are needed, consuming time.

[0004] High cutter cost: multiple cutters need to be purchased, increasing cost.

[0005] Multiple device tool positions are occupied: multiple tool positions are needed to store different cutters, limiting the processing capacity of the device.

[0006] Therefore, developing a drill capable of completing multiple processing tasks at one time is of great significance for improving processing efficiency and reducing cost. UTILITY MODEL CONTENT

[0007] The utility model discloses a multipurpose combined drill to solve the above-mentioned problems existing in the prior art.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0009] A multipurpose combined drill comprises:

[0010] A cutter body is used to connect a first cutting edge and a second cutting edge and is connected with a machine tool spindle to provide rotary power; the material of the cutter body is high-speed steel or hard alloy;

[0011] The first cutting edge is used to process a hole diameter and has a shape of a cylindrical shape with beveled ends, has a sharp cutting edge, and is used to cut materials to form a hole; the material of the first cutting edge is high-speed steel or hard alloy;

[0012] The second cutting edge is used to process hole mouth front and back chamfers, has a shape of a cone or a conical part, has a sharp cutting edge, and is used to cut materials to form chamfers; the material of the second cutting edge is high-speed steel or hard alloy;

[0013] The first cutting edge and the second cutting edge are fixedly connected on the cutter body in a welding manner.

[0014] Further, the second cutting edge comprises a front end part and a rear end part, the front end part is used to process hole mouth front chamfer, and the rear end part is used to process hole mouth back chamfer in a copy milling manner.

[0015] Further, the cutter body is provided with a cooling hole for the cooling liquid to pass through.

[0016] Further, the cutting edge surfaces of the first cutting edge and the second cutting edge are subjected to coating treatment to improve wear resistance and reduce friction coefficient.

[0017] Further, the welding mode of the first cutting edge and the second cutting edge is brazing or laser welding.

[0018] Further, the tapered portion of the second cutting edge is provided with a plurality of cutting teeth to improve cutting efficiency.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The multipurpose combined drill bit can complete hole diameter machining, hole opening front chamfering and hole opening back chamfering at one time, does not need to replace the cutting tool, and remarkably improves the machining efficiency; only one cutting tool can complete a plurality of machining tasks, reduces the purchase quantity of the cutting tool, and reduces the cutting tool cost; only occupies one equipment tool position, releases more tool positions, and improves the machining capacity of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Figure 2 It is a drilling process schematic view;

[0023] Figure 3 It is a left side chamfering machining schematic view;

[0024] Figure 4 It is a right side chamfering machining schematic view.

[0025] In the drawing: 1, cutter body; 2, first cutting edge; 3, second cutting edge. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious for those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid confusion with the utility model.

[0027] The applicant designs as Figure 1The utility model discloses a multipurpose combined drill bit, comprising: a cutter body 1 for connecting a first cutting edge 2 and a second cutting edge 3, and connecting with a machine tool spindle to provide rotary power; the material of the cutter body 1 is high speed steel or hard alloy; the first cutting edge 2 is used for machining hole diameter, and the shape is a cylinder with bevelled ends, has a sharp cutting edge for cutting material to form a hole; the material of the first cutting edge 2 is high speed steel or hard alloy; the second cutting edge 3 is used for machining hole mouth front face and back chamfer, and the shape is a taper or has a tapered portion, has a sharp cutting edge for cutting material to form a chamfer; the material of the second cutting edge 3 is high speed steel or hard alloy; the first cutting edge and the second cutting edge 3 are fixedly connected on the cutter body 1 by welding.

[0028] Further, the second cutting edge 3 comprises a front end portion and a rear end portion, the front end portion is used for machining hole mouth front chamfer, and the rear end portion is used for machining hole mouth back chamfer by means of copy milling.

[0029] Further, the cutter body 1 is provided with a cooling hole for cooling liquid to pass through.

[0030] Further, the cutting edge surfaces of the first cutting edge 2 and the second cutting edge 3 are treated by coating to improve wear resistance and reduce friction coefficient.

[0031] Further, the welding manner of the first cutting edge 2 and the second cutting edge 3 is brazing or laser welding.

[0032] Further, the tapered portion of the second cutting edge 3 has a plurality of cutting teeth to improve cutting efficiency.

[0033] In the multipurpose combined drill bit, the size and shape of the cutter body 1, the first cutting edge 2 and the second cutting edge 3 are designed according to machining requirements, including but not limited to: the diameter and length of the cutter body 1; the diameter and length of the first cutting edge 2; the taper angle and length of the second cutting edge 3; the relative position of the first cutting edge 2 and the second cutting edge 3.

[0034] Working principle:

[0035] As Figures 2-4 shown, in use, the multipurpose combined drill bit is installed on the machine tool spindle. First, drilling is carried out by the first cutting edge 2 to form the required hole diameter. When the hole diameter machining is completed, the cutter continues to advance, and the front end portion of the second cutting edge 3 contacts the workpiece to carry out hole mouth front chamfer machining. Then, the cutter retreats back to the appropriate position, and the rear end portion of the second cutting edge 3 is used to machine the hole mouth back chamfer by means of copy milling.

[0036] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No feature of the application is considered critical unless it is expressly stated in the claims.

Claims

1. A multi-purpose combination drill bit, characterized by, The utility model relates to a cutting tool for machining hole, comprising: a cutter body for connecting the first cutting edge and the second cutting edge and connecting with the main shaft of the machine tool to provide rotary power; the material of the cutter body is high speed steel or hard alloy; the first cutting edge for machining hole diameter is in the shape of a cylinder with bevelled ends, has sharp cutting edges for cutting materials to form holes; the material of the first cutting edge is high speed steel or hard alloy; the second cutting edge for machining hole mouth front face and back face chamfer is in the shape of a cone or has a conical part, has sharp cutting edges for cutting materials to form chamfers; the material of the second cutting edge is high speed steel or hard alloy; the first cutting edge and the second cutting edge are fixedly connected on the cutter body by welding.

2. A multi-purpose combination drill bit according to claim 1, wherein, the second cutting edge comprises a front end part for machining hole mouth front face chamfer and a rear end part for machining hole mouth back face chamfer by means of copy milling.

3. The combination drill bit of claim 1, wherein, the cutter body is provided with cooling holes for the cooling liquid to pass through.

4. The combination drill bit of claim 1 wherein, the cutting edge surfaces of the first cutting edge and the second cutting edge are treated by coating to improve wear resistance and reduce friction coefficient.

5. The combination drill bit of claim 1 wherein, the welding mode of the first cutting edge and the second cutting edge is brazing or laser welding.

6. The combination drill bit of claim 1, wherein, the conical part of the second cutting edge has a plurality of cutting teeth to improve cutting efficiency.

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