PCD (Poly Crystal Diamond) micro-edge milling cutter

Abstract

The utility model discloses a PCD (Poly Crystal Diamond) micro-edge milling cutter which comprises a cutter head and a cutter handle, the front end of the cutter handle is fixedly connected with the tail end of the cutter head, cutter grooves are formed in the outer ring surface of the cutter head, four cutter grooves are formed around the surface of the cutter head, a cutting blade is arranged on the inner wall of each cutter groove, and the four cutting blades form a four-edge staggered tooth mechanism. A chip guide groove is formed in the front end of the cutter handle outer ring face. According to the PCD micro-edge milling cutter, by means of a four-edge staggered tooth mechanism composed of the four cutting blades, the cutting edges of every two adjacent 90-degree cutting blades are complementary, the cutting edges of the adjacent 180-degree cutting blades are the same, the PCD micro-edge milling cutter is matched with PCD materials, influences caused by high temperature can be avoided in the cutting process, carbon fiber layering is better cut off, and the cutting efficiency is improved. The cutting resistance is smaller than that of a cutter without a micro-edge structure, the machining efficiency is improved, the higher surface machining quality is achieved, and the problem that the machining efficiency is low due to CNC or laser machining while a traditional milling cutter cannot conduct machining is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of PCD cutting tool technology, and in particular to PCD micro-cutting end mills. Background Technology

[0002] Glass fiber and carbon fiber reinforced composites have high specific strength and specific stiffness, resulting in significant weight reduction. Therefore, they are widely used in aerospace and automotive fields. However, glass fiber and carbon fiber reinforced composites are difficult to process. The following problems exist in the processing of this material: During processing, carbon fibers are easily pulled out or detached from the matrix, resulting in poor workpiece surface quality and affecting performance. Furthermore, when PCD end mills process glass fiber and carbon fiber reinforced composites, the high heat resistance and wear resistance of the material result in high cutting forces and high cutting temperatures, which can damage traditional end mills.

[0003] Currently, glass fiber and carbon fiber reinforced composite materials, when machined with traditional milling cutters, exhibit high heat resistance and wear resistance, resulting in large cutting forces and high cutting temperatures during processing. This easily leads to equipment wear and workpiece surface damage, as well as issues such as burrs, delamination, and chipping during processing, affecting the workpiece's strength and fatigue life. Therefore, CNC or laser processing is often used to replace milling cutters. However, while CNC and laser processing can achieve certain precision requirements and reduce heat-affected zones, limitations in machine tools and cutting tools result in low production efficiency and slow processing speeds. In mass production, it becomes difficult to simultaneously achieve both speed and precision. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a PCD micro-cutting end mill, which has the effects of high wear resistance, high hardness and low wear. Moreover, the end mill adopts a staggered tooth structure and dense tooth design, which can achieve the technical effect of smooth surface of the workpiece without burrs, chipping and flanging.

[0005] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution:

[0006] The technical solution of this utility model is: a PCD micro-cutting end mill, including a cutter head and a cutter shank, wherein the front end of the cutter shank is fixedly connected to the tail end of the cutter head, the outer ring surface of the cutter head is provided with a cutting groove, and four cutting grooves are provided around the surface of the cutter head. Each inner wall of the cutting groove is provided with a cutting blade on one side, and the four cutting blades form a four-flute staggered tooth mechanism. The front end of the outer ring surface of the cutter shank is provided with a chip guide groove that matches the cutting groove.

[0007] Furthermore, one side of the cutting blade protrudes from the outer circumference of the cutting head, and the cutting blade has a cutting edge on the side outside the cutting head, with multiple cutting edges spaced apart along the length of the cutting blade.

[0008] Furthermore, the four-edge staggered tooth mechanism consists of two cutting blades with complementary cutting edges at 90° to each other and two cutting blades with identical cutting edges at 180° to each other.

[0009] Furthermore, an inclined groove adapted to the cutting blade is provided on the other side of the inner wall of the tool groove.

[0010] Furthermore, the tail end of the tool holder is provided with a chamfered groove for mounting on a machining table.

[0011] Furthermore, the junction between the front end of the handle and the blade head is chamfered.

[0012] Furthermore, the cutting blade is made of PCD material.

[0013] Furthermore, the length of the handle is greater than the length of the blade.

[0014] Furthermore, the handle is designed in a cylindrical shape.

[0015] The beneficial technical effects of this utility model are as follows: The four-flute staggered tooth mechanism, composed of four cutting blades, ensures that the cutting edges of any two 90° adjacent cutting blades are complementary, while the cutting edges of 180° adjacent cutting blades are identical. During machining, due to the high hardness and wear resistance of the PCD diamond material, the effects of high temperatures during cutting glass fiber and carbon fiber reinforced composite materials can be effectively avoided. Furthermore, the four-flute staggered tooth mechanism is more conducive to cutting carbon fiber layers, reducing the likelihood of burrs and edge breakage. Compared to ordinary non-micro-edge structure tools, this tool exhibits lower cutting resistance, improving machining efficiency and tool life, and achieving higher surface finish. It effectively solves the problem of traditional milling cutters being unable to process certain materials while avoiding the slow machining efficiency issues associated with CNC or laser processing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a front view schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a side view schematic diagram of the structure of this utility model;

[0019] Figure 4 This is a side sectional view of the cutting blade and tool groove of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the Type A and Type B blades of this utility model.

[0021] The numbers and letters in the diagram represent the names of the corresponding components:

[0022] 1. Tool head; 11. Tool groove; 12. Angled groove; 13. Cutting insert; 131. Type A insert; 132. Type B insert; 2. Tool holder; 21. Chip guide groove. Detailed Implementation

[0023] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0024] See appendix Figures 1-4 As shown, a PCD micro-cutting end mill includes a cutting head 1 and a shank 2. The front end of the shank 2 is fixedly connected to the tail end of the cutting head 1. The tail end of the shank 2 has a chamfered groove for mounting on a machining table. The front end of the shank 2 is chamfered at the junction with the cutting head 1. The length of the shank 2 is greater than the length of the cutting head 1. The shank 2 is cylindrical in design.

[0025] The tool holder 2 can be assembled with the machining center through the chamfered groove at the tail end, and the chamfered groove between the tool holder 2 and the tool head 1 reduces the contact friction between the tool holder 2 and the workpiece during drilling.

[0026] The outer ring surface of the cutter head 1 is provided with a groove 11, and four grooves 11 are provided around the surface of the cutter head 1. A cutting blade 13 is provided on one side of the inner wall of each groove 11. The cutting blade 13 is made of PCD material. One side of the cutting blade 13 protrudes from the outer ring surface of the cutter head 1. A cutting edge is provided on the side of the cutting blade 13 outside the cutter head 1. Multiple cutting edges are provided at intervals along the length of the cutting blade 13. The other side of the inner wall of the groove 11 is provided with a bevel groove 12 that matches the cutting blade 13. The design of the bevel groove 12 can reduce the contact area between the end of the cutter head 1 and the workpiece during cutting, and facilitate the cutting of the workpiece by the end of the cutting blade 13.

[0027] By setting the cutting insert 13, the tool has high wear resistance, high hardness and low wear when processing glass fiber and carbon fiber reinforced composite materials, avoiding the problem of equipment wear and workpiece surface damage caused by high temperature during cutting.

[0028] The front end of the outer ring surface of the tool holder 2 is provided with a chip guide groove 21 that is compatible with the tool groove 11. The chip guide groove 21, in conjunction with the tool groove 11, can discharge the waste chips cut by the cutting tool 13, preventing the cut waste chips from clogging the inside of the machining hole and affecting the normal operation of the cutting tool 13.

[0029] The four cutting inserts 13 form a four-edge staggered tooth mechanism. The four-edge staggered tooth mechanism consists of two 90° adjacent cutting inserts 13 with complementary cutting edges and two 180° adjacent cutting inserts 13 with identical cutting edges.

[0030] The complementary cutting edge design of the four-tooth staggered mechanism enables the tool to effectively cut carbon fiber layers during machining, and the cutting resistance is relatively small compared to tools without micro-edge structures. It is highly efficient during machining and less prone to edge burrs during the cutting process, thus ensuring machining quality.

[0031] As attached Figure 5 As shown, the cutting edge design of the cutting insert 13 is of two types: type A insert 131 and type B insert 132. The cutting edge design of the four cutting inserts 13 is composed of type A insert 131, type B insert 132, type A insert 131 and type B insert 132 in sequence, so that the cutting edges of two adjacent 90° cutting inserts 13 are complementary.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PCD micro-endmill characterized by, Include: The tool head (1) and the tool handle (2), the front end of the tool handle (2) and the tail end of the tool head (1) are fixedly connected, the outer ring surface of the tool head (1) is provided with a tool groove (11), the tool groove (11) is provided with four along the surface of the tool head (1) Circumferential, the inner wall of each tool groove (11) is provided with a cutting blade (13) on one side, four cutting blades (13) form a four-blade staggered tooth mechanism, the front end of the outer ring surface of the tool handle (2) is provided with a chip guide groove (21) matched with the tool groove (11).

2. The PCD micro-endmill of claim 1, wherein, One side of the cutting blade (13) protrudes from the outer ring surface of the tool head (1), the cutting blade (13) is provided with a blade edge on one side outside the tool head (1), the blade edge is provided with a plurality of intervals along the length direction of the cutting blade (13).

3. The PCD microburs mill according to claim 1, wherein, The four-blade staggered tooth mechanism is composed of two 90° adjacent cutting blades (13) with complementary design of blade edge and two 180° adjacent cutting blades (13) with same design of blade edge.

4. The PCD microburs mill according to claim 1, wherein, The other side of the inner wall of the tool groove (11) is provided with a chute (12) matched with the cutting blade (13).

5. The PCD microburs mill according to claim 1, wherein, The tail end of the tool handle (2) is provided with a chamfer groove for mounting on the machining table.

6. The PCD microburs mill according to claim 1, wherein, The front end of the tool handle (2) is chamfered at the joint with the tool head (1).

7. The PCD microburs mill according to claim 1, wherein, The material of the cutting blade (13) is PCD material.

8. The PCD microburs mill according to claim 1, wherein, The length of the tool handle (2) is greater than the length of the tool head (1).

9. The PCD microburs mill according to claim 1, wherein, The tool handle (2) is designed as a cylinder.

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