Square outer chamfering tool

Abstract

The utility model discloses a square outer chamfering cutter which comprises a chamfering cutter body, chamfering edges are arranged at the four corners of the top of the chamfering cutter body, chip removal through grooves used for discharging cutting chips are formed in the positions, close to the chamfering edges, of the top end of the chamfering cutter body, and chip collection grooves used for assisting chip removal are formed in the middles of the multiple chip removal through grooves. Chamfering working faces are arranged on the side of the chamfering cutter body and located between the adjacent sides of the multiple chamfering blades. The chip removal through groove used for discharging cutting chips is formed in the position, close to the chamfering edge, of the top end of the chamfering tool body, a chip removal channel is formed through the design of the chip removal through groove, then the chip collection grooves used for assisting chip removal are formed in the middle of the chip removal through groove, and the chip removal channel is formed in the middle of the chip removal through groove through buffering of the chip collection grooves. According to the cutter body, the buffering interval for discharging, stacking and falling of waste chips generated by cutting of the cutter body can be achieved, discharging is more convenient, the cutter body is protected, and the damage speed of the cutter body can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of cutting tools, in particular to a square external chamfering cutting tool. Background Art

[0002] A chamfering cutter is a tool that is installed on milling machines, drilling machines, machining centers, electric hand drills, chamfering machines and other machine tools to process the chamfering edges of workpieces. It is an end mill.

[0003] At present, when some square chamfering cutters are used to process workpieces, a large amount of spiral or fragmentary waste chips will be generated due to the high-speed rotation of the chamfering cutter. If these waste chips cannot be discharged in time, the wear of the cutter body will be accelerated, thereby shortening the service life of the cutter body. Therefore, some existing cutter bodies are provided with some chip grooves for chip removal. However, in the actual operation process, the cutter body is always in contact with the surface of the workpiece, so that the generated chips will also be squeezed into the chip groove, which cannot be discharged in time, thereby accelerating the damage of the cutter body. Utility Model Content

[0004] The utility model aims to provide a square external chamfering tool to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a square external chamfering tool, comprising a chamfering tool body, the four corners of the top of the chamfering tool body are all set as chamfering edges, a chip removal groove for cutting debris and discharging it to the outside is provided at the top of the chamfering tool body and near the chamfering edge, a chip collecting groove for assisting chip removal is provided in the middle of the multiple chip removal grooves, and the sides of the chamfering tool body and between the adjacent sides of the multiple chamfering edges are all set as chamfering working surfaces.

[0006] Preferably, the chip removal groove is inclined at 8°, and the high slope position of the chip removal groove is set as the chip feed port, the low slope position of the chip removal groove is set as the chip removal port, and the two ends of the chip collecting groove are respectively set in the chip feed port and the chip removal port.

[0007] Preferably, the arc radius of the chip feed opening is 12R, and the arc radius of the chip discharge opening is 18R.

[0008] Preferably, the chip removal opening is opened at the top of the chamfered working surface.

[0009] Preferably, outer surfaces of the plurality of chamfered working surfaces are all provided with a titanium nitride coating.

[0010] Preferably, the chip feed openings and chip discharge openings of the plurality of chip discharge grooves are connected in sequence and arranged in a rectangle.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model firstly provides a chip removal groove for discharging cutting debris at the top of the chamfering cutter body and near the chamfering edge. A chip removal channel is first formed through the design of the chip removal groove, and then a chip collector for auxiliary chip removal is provided in the middle of the chip removal groove. Through the buffering of the chip collection groove, the waste chips generated by the cutting of the cutter body can have a buffer area for discharge, accumulation and falling, thereby making the discharge more convenient, protecting the cutter body and slowing down the speed of damage to the cutter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a top view of the overall structure of the utility model.

[0015] In the figure: 1. chamfering cutter body; 2. chamfering edge; 3. chamfering working surface; 4. chip removal groove; 401. chip feed port; 402. chip removal port; 403. chip collecting groove. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model provides Figure 1-2 A square external chamfering tool shown in the figure includes a chamfering tool body 1, and the four corners of the top of the chamfering tool body 1 are all set as chamfering edges 2. A chip removal groove 4 for discharging cut debris is provided at the top of the chamfering tool body 1 and close to the chamfering edge 2. A chip collecting groove 403 for assisting chip removal is provided in the middle of the multiple chip removal grooves 4. Through the design of the chip collecting groove 403, the generated waste chips can obtain a buffer space for the accumulation of waste chips during the discharge process, thereby making the waste chip discharge smoother. The sides of the chamfering tool body 1 and between the adjacent sides of the multiple chamfering edges 2 are all set as chamfering working surfaces 3.

[0018] It should be noted that the inner walls of the chip removal groove 4 are ground and polished by a polishing machine. The polished chip removal groove 4 is more conducive to chip removal through the chip removal groove 4, avoiding the chip removal groove 4 being not smooth enough, resulting in uneven discharge of waste chips. The height of each chamfering edge 2 gradually decreases from the side away from one chip removal groove 4 to the side close to another chip removal groove 4, and the angle between the highest point and the lowest point is 10 degrees; it is more conducive to guiding waste chips into the chip removal groove 4, thereby facilitating chip removal.

[0019] Specifically, the chip removal groove 4 is set at an inclination of 8°, and the high slope position of the chip removal groove 4 is set as the chip feed port 401, and the low slope position of the chip removal groove 4 is set as the chip removal port 402. The chip feed ports 401 and chip removal ports 402 of multiple chip removal grooves 4 are connected in sequence and arranged in a rectangle, and the two ends of the chip collecting groove 403 are respectively set in the chip feed port 401 and the chip removal port 402.

[0020] Furthermore, the arc radius of the chip feed opening 401 is 12R, and the arc radius of the chip discharge opening 402 is 18R.

[0021] It should be noted that in this solution, by setting the arc radii of the chip feed port 401 and the chip discharge port 402 in different ranges, the interior of the chip discharge slot 4 gradually expands from the chip feed port 401 to the chip discharge port 402. This design makes chip removal more convenient and faster.

[0022] Furthermore, the chip removal opening 402 is opened at the top of the chamfered working surface 3, and the outer surfaces of the plurality of chamfered working surfaces 3 are all provided with a titanium nitride coating.

[0023] It should be noted that the titanium nitride coating is a universal PVD coating, which can improve the hardness of the chamfering edge 2 and have a higher oxidation temperature by improving the strength of the chamfering working surface 3, thereby greatly improving the service life of the entire chamfering tool body 1.

[0024] It should be noted that when the chamfering cutter body 1 uses the chamfering edge 2 for chamfering, the chamfering working surface 3 chamfers the workpiece. At the same time, waste chips will be generated by the cutting of the workpiece by the chamfering edge 2 and the chamfering working surface 3. The waste chips generated from the chamfering working surface 3 will be twisted and spiraled, and will stick to the top of the chamfering cutter body 1, thereby entering the chip feed port 401 of the chip removal groove 4, and then discharged from the chip removal port 402, thereby avoiding the accumulation of waste chips between the workpiece and the chamfering cutter body 1, avoiding affecting the heat dissipation of the chamfering cutter body 1, and facilitating the timely discharge of waste chips, which can better protect the chamfering cutter body 1 and avoid the collapse of the chamfering edge 2.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square external chamfering tool, comprising a chamfering tool body (1), characterized in that: The four corners of the top of the chamfering tool body (1) are all arranged as chamfering edges (2); a chip removal groove (4) for removing cut chips is provided at the top of the chamfering tool body (1) and close to the chamfering edge (2); a chip collecting groove (403) for assisting chip removal is provided in the middle of the plurality of chip removal grooves (4); and a chamfering working surface (3) is provided on the side of the chamfering tool body (1) and between the adjacent sides of the plurality of chamfering edges (2).

2. A square external chamfering tool according to claim 1, characterized in that: The chip removal groove (4) is arranged to be inclined at 8°, and the high slope position of the chip removal groove (4) is arranged as a chip feed port (401), the low slope position of the chip removal groove (4) is arranged as a chip removal port (402), and the two ends of the chip collecting groove (403) are respectively arranged in the chip feed port (401) and the chip removal port (402).

3. A square external chamfering tool according to claim 2, characterized in that: The arc radius of the chip feed opening (401) is 12R, and the arc radius of the chip discharge opening (402) is 18R.

4. A square external chamfering tool according to claim 2, characterized in that: The chip removal opening (402) is opened at the top of the chamfered working surface (3).

5. A square external chamfering tool according to claim 4, characterized in that: The outer surfaces of the plurality of chamfered working surfaces (3) are all provided with a titanium nitride coating.

6. A square external chamfering tool according to claim 2, characterized in that: The chip feed openings (401) and chip discharge openings (402) of the plurality of chip discharge slots (4) are sequentially connected and arranged in a rectangular shape.

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