Special-shaped chamfering cutter

Abstract

The utility model relates to a chamfering special-shaped cutter, which comprises a cutter handle and a cutter head, the cutter head is provided with four cutting edges, the four cutting edges are arranged at intervals, the four cutting edges integrally form an ellipsoid, the long axis direction of the ellipsoid is the same as the axis direction of the cutter handle, at the moment, the cutting edges at the position of the cutter head are arranged to be ellipsoid, and the cutting edges at the position of the cutter head are arranged to be the same as the axis direction of the cutter handle. And the long axis direction of the ellipsoid is the same as the axis direction of the cutter handle, so that the cutting edge is a cambered surface corresponding to the shape of the outer surface of the ellipsoid, and the cutting edge in the vertical direction is longer in the process of processing the cross hole, so that burrs at the position of the cross hole can be directly removed, the processing is finished, and the processing efficiency is high.

Description

Technical Field

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

[0002] Cutting tools are commonly used tools in the machining process. According to different machining equipment, they can be divided into milling cutters, turning tools, boring tools, etc. During the production process, especially during the production of cross holes, large burrs will be generated at the cross hole positions. At this time, in order to avoid scratching the product by the burrs during use, it is necessary to remove the burrs at the cross hole positions. Since the burrs are located on the inner wall of the holes, the work efficiency of using general burr removal tools is relatively low.

[0003] In the prior art, a ball-end milling cutter is used to remove the burrs at the cross hole positions. However, there are certain problems at this time. For example, since the shape of the inner wall at the cross hole positions is not spherical, during the machining process, it is necessary to control the up and down movement of the ball-end milling cutter, which will delay the machining time and thus result in low machining efficiency. Summary of the Utility Model

[0004] Based on this, in view of the problems in the prior art, it is necessary to provide a chamfering special-shaped cutting tool.

[0005] A chamfering special-shaped cutting tool, characterized in that it includes a tool shank and a tool tip. The tool tip is provided with cutting edges. There are 4 cutting edges, and the cutting edges are arranged at intervals. The 4 cutting edges form an ellipsoidal shape as a whole, and the major axis direction of the ellipsoid is the same as the axis direction of the tool shank.

[0006] In one embodiment, the tool shank and the tool tip are connected by a tool neck, and the diameter of the tool neck is smaller than the diameter of the tool shank.

[0007] In one embodiment, chip flutes are formed between adjacent cutting edges, and the chip flutes extend to the position of the tool neck.

[0008] In one embodiment, the position of the chip flute close to the tool shank is an arc surface.

[0009] In one embodiment, two oppositely arranged cutting edges are distributed in a staggered manner on both sides of the central axis of the tool tip.

[0010] In one embodiment, the outer end of the tool tip is provided with a concave portion, and the concave portion forms an end cutting edge at the cutting edge position of the tool tip.

[0011] For the above chamfered special-shaped tool, at this time, the cutting edge at the tool tip is set to an ellipsoidal shape, and the major axis direction of the ellipsoid is the same as the axis direction of the tool shank. In this way, the cutting edge is an arc surface corresponding to the outer surface shape of the ellipsoid. During the process of machining intersecting holes, since the length of the cutting edge in the vertical direction is relatively long, the burrs at the intersecting hole position can be directly removed, thus completing the machining with high machining efficiency. Brief Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a spherical tool for machining intersecting holes in the prior art;

[0013] Figure 2 It is a schematic structural diagram of the chamfered special-shaped tool of the present invention;

[0014] Figure 3 It is a schematic structural diagram of the chamfered special-shaped tool of the present invention;

[0015] Figure 4 It is a schematic structural diagram of the chamfered special-shaped tool of the present invention for machining intersecting holes;

[0016] Among them, 1. Tool shank; 2. Tool tip; 3. Cutting edge; 4. Tool neck; 5. Chip groove; 51. Arc surface; 6. Concave part. Detailed Embodiment

[0017] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0020] As Figures 2 to 4 shown, a chamfered special-shaped tool, characterized in that it includes a tool shank 1 and a tool tip 2. The tool tip 2 is provided with cutting edges 3. There are 4 cutting edges 3, and the cutting edges 3 are arranged at intervals. The 4 cutting edges 3 form an ellipsoidal shape as a whole, and the major axis direction of the ellipsoid is the same as the axis direction of the tool shank 1.

[0021] At this time, the cutting edge 3 at the position of the tool tip 2 is set to an ellipsoidal shape, and the major axis direction of the ellipsoid is the same as the axis direction of the tool shank 1. In this way, the cutting edge 3 is an arc surface 51 corresponding to the outer surface shape of the ellipsoid. During the process of machining cross holes, since the length of the cutting edge in the vertical direction is relatively long, the burrs at the cross hole position can be directly removed, thus completing the machining with high machining efficiency.

[0022] A cross hole means that after a vertical hole is opened in a product, a horizontal hole is opened on the side wall of the product. At this time, the horizontal hole communicates with the vertical hole, thus forming a cross hole. Since there is a sequence of machining for the two holes, burrs will inevitably be formed at the cross hole position. During the machining process, if a ball cutter is used, the cutter will first contact the left and right sides of the cross hole. In order to completely remove the burrs at the cross hole position, it is necessary to continue to move the cutter horizontally or vertically up and down until the cutter contacts the upper and lower sides of the cross hole, so as to complete the removal of burrs. However, during this process, since the spherical cutter first contacts the left and right sides (as Figure 1 shown), if the cutter is continued to be moved horizontally, it will cause excessive machining on the left and right sides of the cross hole, affecting the product dimensions. If the cutter is continued to be moved vertically, the machining time will be increased, thus affecting the machining efficiency.

[0023] In this application, the cutting edges 3 of the tool tip 2 part of the cutter are integrally set to an ellipsoidal shape. During the machining process, the tool tip 2 moves downward to the position of the horizontal hole, and then the tool tip 2 moves horizontally. At this time, the lateral dimension of the tool tip 2 is small and it will not contact the left and right sides of the cross hole first. The cutter moves until it contacts the cross hole. At this time, the cutter can contact all the edges of the cross hole simultaneously, so as to simultaneously complete the removal of burrs at the cross hole position. It is not necessary to move the cutter in the vertical direction to complete the removal of burrs at the cross hole position.

[0024] Meanwhile, the cutting edge 3 of the cutter head 2 is set to an ellipsoidal shape, so that the lateral dimension of the cutter head 2 part is relatively small, which is also more suitable for deburring in the case of a small-sized vertical hole, avoiding contact between the cutter head 2 and the inner wall of the vertical hole and affecting the product.

[0025] Since it is necessary to process the burrs at the intersection hole position, the tool will move horizontally. Therefore, in order to avoid contact between the tool and the vertical hole during the movement, in this embodiment, the tool shank 1 and the cutter head 2 are connected by a tool neck 4, and the diameter of the tool neck 4 is smaller than the diameter of the tool shank 1.

[0026] In order to discharge the waste chips during the processing, in this embodiment, a chip discharge groove 5 is formed between adjacent cutting edges 3, and the chip discharge groove 5 extends to the position of the tool neck 4. Further, the position of the chip discharge groove 5 close to the tool shank 1 is an arc surface 51. By setting the position of the chip discharge groove 5 close to the tool shank 1 as the arc surface 51, when the waste chips move to the position of the arc surface 51, the waste chips can be wound and discharged, thereby improving the chip discharge efficiency.

[0027] In order to enhance the strength of the cutting edge 3, in this embodiment, two oppositely arranged cutting edges 3 are staggeredly distributed on both sides of the central axis of the cutter head 2. The staggered distribution of the cutting edges 3 means that with the center of the cutter head 2 as the reference, the centers of the cutting edges 3 are distributed on both sides of the center of the cutter head 2. Since the cutting edge 3 has a certain thickness, the center of the cutting edge refers to the middle surface position between the two side surfaces of the cutting edge 3. In this way, the middle connection part of the four cutting edges 3 (that is, the center position of the cutter head 2) is thicker, and during use, the cutting edge 3 is not easily broken, thereby improving the service life of the tool.

[0028] In order to improve the service life of the tool, in this embodiment, an inner concave portion 6 is provided at the outer end of the cutter head 2, and an end cutting edge is formed at the position of the cutting edge 3 of the cutter head 2. The end cutting edge can be used for removing burrs on the outer hole, further increasing the usage environment of the tool, improving the tool utilization rate, and also reducing the tool change process and improving production efficiency.

[0029] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0030] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A chamfering tool, characterized in that: It comprises a tool handle and a tool head, wherein the tool head is provided with a chip cutting edge, wherein four chip cutting edges are provided, and the chip cutting edges are arranged at intervals, and the four chip cutting edges form an ellipsoid as a whole, and the long axis direction of the ellipsoid is the same as the axis direction of the tool handle.

2. The chamfering tool according to claim 1, characterized in that: The knife handle and the knife head are connected via a knife neck, and the diameter of the knife neck is smaller than the diameter of the knife handle.

3. The chamfering tool according to claim 2, characterized in that: A chip removal groove is formed between adjacent chip cutting edges and extends to the position of the tool neck.

4. The chamfering special-shaped tool according to claim 3, characterized in that: The chip removal groove is an arc surface near the tool handle.

5. The chamfering special-shaped tool according to claim 4, characterized in that: Two oppositely arranged chip cutting edges are staggered and distributed on both sides of the center axis of the cutter head.

6. The chamfering profile tool according to any one of claims 1 to 5, characterized in that: An inner concave portion is provided at the outer end of the cutter head, and the inner concave portion forms an end edge at the chip edge position of the cutter head.

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