Drilling and milling composite tools

Abstract

This utility model discloses a drilling and milling composite tool, including a drill part, a milling cutter part, and a tool holder part. The milling cutter part is located between the drill part and the tool holder part. The drill part is a carbide insert U-drill, and the milling cutter part is a PCD composite milling cutter. The drill part is located at the front end of the milling cutter part. The outer peripheral cutting edge of the milling cutter part includes a main cutting edge and chamfering edges located at both ends of the main cutting edge. The inclination angle of the chamfering edges is 15°, and the distance between the outer end of the chamfering edges and the main cutting edge is 1.5mm. The cutting edge of the main cutting edge adopts a three-tooth overlapping arc tangent cutting edge method. This utility model drilling and milling composite tool uses a carbide insert U-drill at the front end and a PCD composite milling cutter at the rear end to complete drilling, chamfering, and finishing on a single tool. During the machining process, there is no need to frequently change different tools, reducing tool change time and machining feed and exit time, thereby effectively meeting the production cycle.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a drilling and milling composite tool. Background Technology

[0002] When drilling certain workpieces, such as Figure 1 The workpiece shown has high precision requirements for the inner wall of the drilled hole and requires chamfering at both ends. Therefore, milling and chamfering are necessary after drilling. Traditional tools can only perform drilling and milling separately, leading to frequent tool changes during the process. This frequent tool changes disrupt the production cycle, failing to meet the average cycle time of the production line and impacting processing efficiency. Furthermore, the excessive number of tools increases processing costs. Therefore, a drilling-milling composite tool is developed. Utility Model Content

[0003] The purpose of this utility model is to provide a drilling and milling composite tool to solve the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a drilling and milling composite tool, comprising a drill bit portion, a milling cutter portion, and a tool holder portion. The milling cutter portion is disposed between the drill bit portion and the tool holder portion. The drill bit portion is a carbide insert U-drill, and the milling cutter portion is a PCD composite end mill.

[0006] Furthermore, the drill bit portion is located at the front end of the milling cutter portion.

[0007] Furthermore, the outer peripheral cutting edge of the milling cutter includes a main cutting edge and chamfering edges disposed at both ends of the main cutting edge.

[0008] Furthermore, the chamfering edge has an inclination angle of 15°, and the distance between the outer end of the chamfering edge and the main cutting edge is 1.5mm.

[0009] Furthermore, the cutting edge of the main cutting edge adopts a three-tooth overlapping arc tangent cutting edge method.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] This novel drilling and milling composite tool uses a carbide U-shaped drill at the front end and a PCD composite insert for interpolation milling at the rear end, completing drilling, chamfering, and finishing on a single tool. This eliminates the need for frequent tool changes, reducing tool change time and machining feed / exit times, thus effectively meeting production cycle requirements. This invention also reduces the number of tools used and inventory during machining, lowering production costs. Furthermore, the cutting edge employs a three-tooth overlapping tangential arc design, reducing edge chipping during machining and extending tool life. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 A schematic diagram showing the workpiece processed according to this utility model;

[0014] Figure 2 This is a front view of the structure of this utility model;

[0015] Figure 3 for Figure 2 The left view;

[0016] Figure 4 This is a plan view of the cutting edge of the milling cutter part of this utility model;

[0017] Figure 5 This is a detailed schematic diagram of the cutting edge tooth shape of the milling cutter part of this utility model;

[0018] Explanation of reference numerals in the attached diagram: 1. Drill bit; 2. Milling cutter; 2-1. Main cutting edge; 2-2. Chamfering edge; 3. Tool holder. Detailed Implementation

[0019] like Figures 2-5 As shown, a drilling and milling composite tool includes a drill part 1, a milling cutter part 2 and a tool holder part 3. The milling cutter part 2 is disposed between the drill part 1 and the tool holder part 2. Specifically, the drill part 1 is located at the front end of the milling cutter part 2.

[0020] The drill bit part 1 is a carbide insert U-drill, and the milling cutter part 2 is a PCD composite end mill.

[0021] The outer peripheral cutting edge of the milling cutter portion 2 includes a main cutting edge 2-1 and chamfering edges 2-2 disposed at both ends of the main cutting edge 2-1. The chamfering edges 2-2 have an inclination angle of 15°, and the distance between the outer end of the chamfering edges 2-2 and the main cutting edge 2-1 is 1.5 mm for use. Figure 1 The processing requirements of the workpiece shown.

[0022] This utility model is in the process of... Figure 1When machining the workpiece shown, the workpiece is first directly drilled by the carbide U-drill in the drill bit part. After drilling through, the machine tool control continues to make the axis of all PCD composite cutter in the tool guide end mill part coincide with the depth of the workpiece. The cutter is cut around one revolution by interpolation milling. During this process, the main cutting edge of the end mill part is machined to make the hole wall, and the roughness of the hole wall is completely controlled within the range of RZ33+2. In addition, the chamfering edge of the end mill part completes the chamfering of both ends of the drilled hole.

[0023] In addition, the cutting edge of the main cutting edge of the milling cutter part of this utility model adopts the following... Figure 5 The three-tooth overlapping arc tangent cutting edge method shown is illustrated.

[0024] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model, so as to reduce the occurrence of chipping of the cutting edge during operation.

Claims

1. A drilling and milling composite tool, characterized in that: It includes a drill bit portion, a milling cutter portion, and a tool holder portion. The milling cutter portion is located between the drill bit portion and the tool holder portion. The drill bit portion is a carbide insert U-drill, and the milling cutter portion is a PCD composite end mill.

2. The drilling and milling composite tool according to claim 1, characterized in that: The drill bit portion is located at the front end of the milling cutter portion.

3. The drilling and milling composite tool according to claim 1, characterized in that: The outer peripheral cutting edge of the milling cutter includes a main cutting edge and chamfering edges disposed at both ends of the main cutting edge.

4. The drilling and milling composite tool according to claim 3, characterized in that: The chamfering edge has an inclination angle of 15°, and the distance between the outer end of the chamfering edge and the main cutting edge is 1.5 mm.

5. The drilling and milling composite tool according to claim 3, characterized in that: The main cutting edge adopts a three-tooth overlapping arc tangent cutting edge method.

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