Drilling and milling cutter for upper and lower chamfers

Abstract

The utility model discloses a drilling and milling cutter with upper and lower chamfers, and belongs to the field of drilling and milling cutters. The vertical chamfering drilling and milling cutter comprises a cutting part, a neck part and a handle part which are fixedly connected in sequence, the cutting part comprises a drilling and milling chamfering edge, a side edge and a dovetail chamfering edge, the drilling and milling chamfering edge is arranged at the foremost end of the cutting part, the side edge is arranged on the peripheral surface of the outer wall of the cutting part, and the dovetail chamfering edge is arranged at the front end of the cutting part. The dovetail chamfering edge is arranged on the circumferential surface of the tail end of the cutting part; the neck part comprises a clearance rod; according to the utility model, the drilling and milling chamfering edge, the side edge and the dovetail chamfering edge are matched for use, so that drilling, chamfering, dovetail reverse chamfering and side wall milling can be completed at one time, the processing time of a product is effectively shortened, the production efficiency is improved, and the cost of the cutter is reduced; by means of the cutting edges symmetrically arranged on the drilling and milling chamfering edge and the spiral edges symmetrically arranged on the side walls of the side edges, even and stable drilling and milling force can be formed when the cutter handle rotates rapidly, and therefore the drilling and milling effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling and milling tools, in particular to an upper and lower chamfering drilling and milling tool. Background Art

[0002] The drilling and milling tool is a multifunctional tool that combines drilling and milling functions. It is mainly used to perform drilling and milling operations on the workpiece at the same time to improve processing efficiency and accuracy. During the drilling and milling process, it is often necessary to chamfer the edge of the material to remove sharp corners or sharp corners, form a rounded corner or bevel, and improve the safety of the workpiece.

[0003] At present, the existing drilling and milling tools do not have the chamfering function. In the actual production process, different tools need to be replaced to achieve the chamfering function, which reduces the processing efficiency and requires multiple tools to be prepared, which increases the tool cost. Therefore, an upper and lower chamfering drilling and milling tool is proposed. Utility Model Content

[0004] The utility model aims to solve the problem that the existing drilling and milling tools do not have the chamfering function and need to be constantly replaced, resulting in reduced processing efficiency and increased tool costs, and proposes an upper and lower chamfering drilling and milling tool.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A top and bottom chamfering drilling and milling tool comprises a cutting portion, a neck portion and a shank portion which are fixedly connected in sequence, wherein the cutting portion comprises a drilling and milling chamfering edge, a side edge and a dovetail chamfering edge, wherein the drilling and milling chamfering edge is arranged on the front end of the cutting portion, the side edge is arranged on the outer wall circumference of the cutting portion, and the dovetail chamfering edge is arranged on the end circumference of the cutting portion; the neck portion comprises a clearance rod; and the shank portion comprises a tool handle.

[0007] Preferably, the central axes of the drilling and milling chamfering edge, the side edge, the dovetail chamfering edge, the clearance rod and the tool handle coincide with each other.

[0008] Preferably, the diameter of the air avoidance rod is smaller than the diameter of the tool handle.

[0009] Preferably, the end of the drilling and milling chamfering blade has a taper, and the drilling and milling chamfering blade is provided with two cutting edges which are symmetrically arranged.

[0010] Preferably, the side cutting edge comprises two spiral edges which are symmetrically arranged, and a chip removal groove is formed between the two spiral edges.

[0011] Preferably, both ends of the chip removal groove extend to the drilling and milling chamfering edge and the dovetail chamfering edge respectively.

[0012] Preferably, the maximum circumferential diameter formed by the drilling and milling chamfering edge, the side edge and the dovetail chamfering edge is larger than the diameter of the clearance rod.

[0013] Preferably, there is a rounded transition between the connection between the drilling and milling chamfering edge, the side edge and the dovetail chamfering edge.

[0014] Preferably, the chamfering inclination of the drilling and milling chamfering edge is 30-45 degrees.

[0015] Preferably, the chamfering inclination of the dovetail chamfering edge is 45-60 degrees.

[0016] Compared with the prior art, the utility model provides an upper and lower chamfering drilling and milling tool, which has the following beneficial effects:

[0017] 1. The upper and lower chamfering drilling and milling tool can complete drilling, chamfering, dovetail reverse chamfering and milling side wall processing at one time through the coordinated use of drilling and milling chamfering edges, side edges and dovetail chamfering edges, effectively reducing the processing time of the product, improving production efficiency and reducing tool costs.

[0018] 2. The upper and lower chamfering drilling and milling tools utilize the symmetrically arranged cutting edges on the drilling and milling chamfering blades and the symmetrically arranged spiral edges on the side walls of the side blades to form a uniform and stable drilling and milling force when the tool handle rotates rapidly, thereby improving the drilling and milling effect. In addition, with the setting of the chip removal groove, the chips generated during drilling and milling can be quickly discharged, thereby improving the drilling and milling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a top and bottom chamfering drilling and milling tool proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of a side view of an upper and lower chamfering drilling and milling tool proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the main plane structure of the drilling and chamfering edge end of an upper and lower chamfering drilling and milling tool proposed by the utility model;

[0022] Figure 4 A processing schematic diagram of an upper and lower chamfering drilling and milling tool proposed by the utility model;

[0023] Figure 5 The utility model is a schematic diagram of the inclination angle position of an upper and lower chamfering drilling and milling tool.

[0024] In the figure: 1. Drilling and milling chamfering edge; 2. Side edge; 21. Chip groove; 3. Dovetail chamfering edge; 4. Avoidance rod; 5. Tool handle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Example:

[0028] Reference Figure 1-Figure 4 A top and bottom chamfering drilling and milling tool comprises a cutting part, a neck and a shank which are fixedly connected in sequence, the cutting part comprises a drilling and milling chamfering edge 1, a side edge 2 and a dovetail chamfering edge 3, the drilling and milling chamfering edge 1 is arranged on the front end of the cutting part, the side edge 2 is arranged on the outer wall circumference of the cutting part, and the dovetail chamfering edge 3 is arranged on the end circumference of the cutting part; the neck comprises a clearance rod 4; the shank comprises a tool handle 5.

[0029] The central axes of the drilling and milling chamfering edge 1, the side edge 2, the dovetail chamfering edge 3, the clearance rod 4 and the tool holder 5 coincide with each other.

[0030] The diameter of the clearance rod 4 is smaller than the diameter of the tool handle 5 .

[0031] The end of the drilling and milling chamfering blade 1 has a taper, and the setting of the taper makes it easy for the tip of the drilling and milling chamfering blade 1 to pierce the processing material. The drilling and milling chamfering blade 1 is provided with two cutting edges, and the cutting edges on both sides can perform drilling and milling more efficiently.

[0032] The side edge 2 includes two spiral edges, and a chip groove 21 is formed between the two spiral edges. The two ends of the chip groove 21 extend to the drilling and milling chamfering edge 1 and the dovetail chamfering edge 3 respectively. The chip groove 21 can quickly discharge the debris generated during drilling and milling.

[0033] The maximum circumferential diameter formed by the drilling and milling chamfering edge 1 , the side edge 2 and the dovetail chamfering edge 3 is larger than the diameter of the clearance rod 4 .

[0034] The connection between the drilling and milling chamfering edge 1, the side edge 2 and the dovetail chamfering edge 3 is provided with a rounded transition.

[0035] Among them, the helix angle of the side edge 2 (refer to Figure 5 , C) is 18 degrees;

[0036] The chamfering inclination (i.e., lower rake angle) of the drilling and milling chamfering edge 1 is 30-45 degrees; Figure 5 , point A is the lower front angle of the drilling and milling chamfering edge 1, and the specific inclination angle is 45 degrees; point A is the lower back angle of the drilling and milling chamfering edge 1, and the specific inclination angle is 8 degrees.

[0037] The chamfering angle of the dovetail chamfering edge 3 is 45-60 degrees (i.e., the upper front angle), wherein, Figure 5 , D is the lower front angle of the drilling and milling chamfering edge 1, and the specific inclination angle is 45 degrees; E is the lower back angle of the drilling and milling chamfering edge 1, and the specific inclination angle is 8 degrees.

[0038] Reference Figure 4 It should be noted that the drilling and milling chamfering edge 1 is in the upper chamfering processing state; the side edge 2 is in the milling processing state; the dovetail chamfering edge 3 is in the lower chamfering processing state; and the avoidance rod 4 is in the drilling processing state.

[0039] Reference Figure 1-Figure 5 When the utility model is used, the tool handle 5 is installed into the main spindle of the machine tool, the drilling and chamfering blade 1 or the dovetail chamfering blade 3 of the cutting part is attached to the side wall of the processing material that needs to be chamfered, and the tool handle 5 is driven to rotate, so as to complete the chamfering or dovetail chamfering of the material; the drilling and chamfering blade 1 is directly attached to the surface of the material, and the rotation of the tool handle 5 is used to complete the drilling process on the surface of the material; the side blade 2 is attached to the side wall of the processing material, and the tool handle 5 is rotated to mill the material; in summary, the use of this tool can complete drilling, milling, chamfering and dovetail chamfering, replacing the original four knives to complete the processing actions, effectively reducing the processing time of the product, improving production efficiency, and reducing tool costs.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An upper and lower chamfering drilling and milling tool, comprising a cutting portion, a neck portion and a shank portion which are fixedly connected in sequence, characterized in that: The cutting portion comprises a drilling and milling chamfering edge (1), a side edge (2) and a dovetail chamfering edge (3), wherein the drilling and milling chamfering edge (1) is arranged at the front end of the cutting portion, the side edge (2) is arranged on the outer wall surface of the cutting portion, and the dovetail chamfering edge (3) is arranged on the end surface of the cutting portion; The neck portion comprises a clearance rod (4); The handle portion comprises a knife handle (5).

2. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The central axes of the drilling and milling chamfering edge (1), the side edge (2), the dovetail chamfering edge (3), the clearance rod (4) and the tool handle (5) coincide with each other.

3. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The diameter of the air avoidance rod (4) is smaller than the diameter of the knife handle (5).

4. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The end of the drilling and milling chamfering blade (1) has a taper, and the drilling and milling chamfering blade (1) is provided with two cutting edges which are symmetrically arranged.

5. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The side cutting edge (2) comprises two spiral edges which are symmetrically arranged, and a chip removal groove (21) is formed between the two spiral edges.

6. The upper and lower chamfering drilling and milling tool according to claim 5, characterized in that: Both ends of the chip removal groove (21) extend to the drilling and milling chamfering edge (1) and the dovetail chamfering edge (3) respectively.

7. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The maximum circumferential diameter formed by the drilling and milling chamfering edge (1), the side edge (2) and the dovetail chamfering edge (3) is greater than the diameter of the clearance rod (4).

8. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The connection points between the drilling and milling chamfering edge (1), the side edge (2) and the dovetail chamfering edge (3) are all provided with rounded transitions.

9. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The chamfering inclination of the drilling and milling chamfering edge (1) is 30-45 degrees.

10. The upper and lower chamfering drilling and milling tool according to claim 1, characterized in that: The chamfering inclination of the dovetail chamfering edge (3) is 45-60 degrees.

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