Cutting tool

Abstract

The cutting tool comprises a tool body, a bearing and a grinding tool, the outer surface of the tool body is provided with a containing groove and a positioning hole, the positioning hole enables the inner wall face of the containing groove to be communicated with the outer surface of the tool body, the grinding tool is arranged in the positioning hole in a sleeved mode, and an inner ring of the bearing is hinged to the interior of the containing groove through a limiting pin. The outer ring of the bearing abuts against the outer surface of the grinding knife, the whole grinding knife is in a sphere shape, and the length of the positioning hole is smaller than the diameter of the grinding knife. According to the technical scheme, on one hand, due to the fact that the appearance size of the grinding knife is small, the grinding knife can be installed in the positioning hole, and the grinding knife is convenient to replace, assemble and disassemble; and on the other hand, even if the surface of the grinding knife is slightly abraded, the change of the positioning size of the grinding knife relative to the workpiece is small, the grinding machining precision can be guaranteed, when the grinding knife is arranged in the positioning hole, the work of adjusting the positioning size between the grinding knife and the workpiece is reduced, and the labor intensity is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, in particular to a cutting tool. Background Art

[0002] At present, cutting technology is still the main processing method for mechanical products. Among them, grinding is mainly used to polish the surface of the workpiece, reduce the surface roughness of the workpiece, and improve the surface finish of the workpiece. Conventional grinding processes generally use grinders as processing equipment and grinding wheels as cutting tools. During grinding, the workpiece usually rotates with the spindle of the grinder, and the cutting tool rotates with the tool shaft on the grinder. The relative movement between the workpiece and the cutting tool is used to grind and remove the coarser material on the workpiece surface. The grinding process is also accompanied by wear of the grinding wheel. When the grinding wheel surface is severely worn, the entire cutting tool needs to be replaced in time.

[0003] In the prior art, the patent document with publication number "CN202221018726.4" discloses a new type of gear hobbing tool with replaceable blades, including a tool rod, an end cover, multiple tool blocks and a carbide blade. The multiple tool blocks are installed end to end on the tool rod to form a spiral tool body; the two ends of the tool body are connected to the end cover, and the end cover is fixed on the tool rod; the carbide blade is detachably arranged on the outer circular top of the tool body. With this patented technical solution, when the tool is worn, only the blade needs to be replaced, replacing the previous multiple grinding and repair of the hob blade, saving processing preparation time and improving labor productivity. However, during the grinding process, when the cutting tool surface is slightly worn, the operator is not easily aware of it with the naked eye, but it will cause the external dimensions of the cutting tool to change, and the positioning dimensions of the cutting tool relative to the workpiece will also change accordingly. If the entire cutting tool is replaced, after the new cutting tool is installed, it is often necessary to readjust the positioning position of the cutting tool relative to the workpiece, thereby increasing the labor intensity of the operator. If only some of the blades in the patent document mentioned above are replaced, the grinding accuracy of the workpiece surface will also be affected during the grinding process due to the inconsistent external dimensions of the blades. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a cutting tool.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a cutting tool, comprising a tool body, a bearing and a grinder, wherein the outer surface of the tool body is provided with a receiving groove and a positioning hole, and the positioning hole enables the inner wall surface of the receiving groove to communicate with the outer surface of the tool body, the grinder is sleeved in the positioning hole, the inner ring of the bearing is hinged in the receiving groove by using a limit pin, the outer ring of the bearing and the outer surface of the grinder abut against each other, the grinder is in the shape of a spherical body as a whole, and the length of the positioning hole is smaller than the diameter of the grinder.

[0007] The positioning hole intersects with the inner wall surface of the accommodating groove at the knife entry edge, and the positioning hole intersects with the outer surface of the knife body at the knife exit edge. The diameter of the knife entry edge is larger than the diameter of the sharpening knife, and the diameter of the knife exit edge is smaller than the diameter of the sharpening knife.

[0008] The blade inlet is circular.

[0009] The knife edge is circular.

[0010] The central axis of the limiting pin and the central axis of the positioning hole are perpendicular to each other.

[0011] One end of the limit pin is provided with a cover platform, and the other end of the limit pin is provided with a clamping groove, in which an opening retaining ring is sleeved, and the cover platform and the opening retaining ring are both abutted against the outer surface of the knife body.

[0012] The cutter body is also threadedly connected with a bolt, and the bolt passes through the open retaining ring.

[0013] The number of the bolts is two.

[0014] A cooling hole is further provided in the blade body, one end of the cooling hole is connected to the inner wall surface of the accommodating groove, and the other end of the cooling hole is connected to the outer surface of the blade body, and the positioning hole and the cooling hole are opposite to each other.

[0015] The knife body includes a knife rod and a knife head. The accommodating groove and the positioning hole are both arranged on the knife head. The knife rod is in the shape of a cylinder or a cuboid as a whole.

[0016] The beneficial effects of the present invention are as follows: by adopting the technical solution of the present invention, during the grinding process, the operator can easily detect whether the grinding cutter is worn by simply observing whether there is a gap between the grinding cutter and the outer surface of the bearing. When the damaged grinding cutter is replaced, on the one hand, due to the small outer dimensions of the grinding cutter, the grinding cutter can be installed in the positioning hole, so that the grinding cutter is easy to replace and load and unload; on the other hand, due to the small outer dimensions of the grinding cutter, even if the grinding cutter surface is slightly worn, the positioning dimension between the grinding cutter and the workpiece will change less, which is conducive to ensuring the grinding accuracy. Moreover, due to the small outer dimensions of the grinding cutter, multiple grinding cutters can be prepared. When the grinding cutter is installed in the positioning hole, the work of adjusting the positioning dimension between the grinding cutter and the workpiece is reduced, thereby reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the utility model;

[0018] Figure 2 This utility model Figure 1 Sectional view cut along the AA plane;

[0019] Figure 3 This is the main view of the knife body of the utility model;

[0020] Figure 4 This is the main view of the open retaining ring of the utility model;

[0021] Figure 5 It is a front view of the limit pin of the utility model.

[0022] In the figure: 1- cutter body, 2- bearing, 3- grinding knife, 4- receiving groove, 5- positioning hole, 6- limiting pin, 7- cutting edge, 8- cutting edge, 9- cover, 10- opening retaining ring, 11- bolt, 12- cooling hole, 13- cutter bar, 14- cutter head. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0024] like Figures 1 to 5 As shown, the utility model provides a cutting tool, including a cutter body 1, a bearing 2 and a grinder 3. The outer surface of the cutter body 1 is provided with a receiving groove 4 and a positioning hole 5, and the positioning hole 5 makes the inner wall surface of the receiving groove 4 communicate with the outer surface of the cutter body 1, the grinder 3 is sleeved in the positioning hole 5, the inner ring of the bearing 2 is hinged in the receiving groove 4 using a limit pin 6, the outer ring of the bearing 2 and the outer surface of the grinder 3 are abutted against each other, the grinder 3 is spherical as a whole, and the length of the positioning hole 5 is smaller than the diameter of the grinder 3.

[0025] By adopting the technical solution of the present invention, during the grinding process, the operator can easily detect whether the grinding cutter is worn by simply observing whether there is a gap between the grinding cutter and the outer surface of the bearing. When the damaged grinding cutter is replaced, on the one hand, due to the small external dimensions of the grinding cutter, the grinding cutter can be installed in the positioning hole, making the grinding cutter easy to replace and load and unload; on the other hand, due to the small external dimensions of the grinding cutter, even if the grinding cutter surface is slightly worn, the positioning dimension between the grinding cutter and the workpiece will change less, which is conducive to ensuring the grinding accuracy. Moreover, due to the small external dimensions of the grinding cutter, multiple grinding cutters can be prepared. When the grinding cutter is installed in the positioning hole, the work of adjusting the positioning dimension between the grinding cutter and the workpiece is reduced, thereby reducing labor intensity.

[0026] Specifically, the positioning hole 5 intersects the inner wall of the receiving groove 4 at an entry edge 7, and the positioning hole 5 intersects the outer surface of the blade body 1 at an exit edge 8. The diameter of the entry edge 7 is larger than the diameter of the sharpening blade 3, while the diameter of the exit edge 8 is smaller than the diameter of the sharpening blade 3. Preferably, the entry edge 7 and the exit edge 8 are circular. The central axis of the stop pin 6 is perpendicular to the central axis of the positioning hole 5.

[0027] In addition, a cover 9 is provided at one end of the stop pin 6, and a slot is provided at the other end. A retaining ring 10 is fitted into the slot. Both the cover 9 and the retaining ring 10 abut against the outer surface of the cutter body 1. The cutter body 1 is also threadedly connected to a bolt 11 that passes through the retaining ring 10. Preferably, there are two bolts 11. This further ensures the relative assembly position of the bearing 2, the grinding tool 3, and the workpiece, ensuring grinding accuracy.

[0028] Furthermore, a cooling hole 12 is provided within the cutter body 1. One end of the cooling hole 12 is connected to the inner wall of the accommodating groove 4, and the other end is connected to the outer surface of the cutter body 1. The positioning hole 5 and the cooling hole 12 are positioned opposite each other. By adopting the technical solution of the present utility model, coolant can be delivered to the surface of the grinding blade 3 through the cooling hole 12, effectively dissipating cutting heat during the grinding process and helping to ensure grinding accuracy.

[0029] In addition, the blade body 1 includes a blade rod 13 and a blade head 14 . The accommodating groove 4 and the positioning hole 5 are both provided on the blade head 14 . The blade rod 13 is in the shape of a cylinder or a cuboid as a whole.

Claims

1. A cutting tool, characterized in that: The present invention comprises a knife body (1), a bearing (2) and a sharpening knife (3), wherein the outer surface of the knife body (1) is provided with a receiving groove (4) and a positioning hole (5), and the positioning hole (5) enables the inner wall surface of the receiving groove (4) to communicate with the outer surface of the knife body (1), and the sharpening knife (3) is set in the positioning hole (5), the inner ring of the bearing (2) is hinged in the receiving groove (4) using a limit pin (6), the outer ring of the bearing (2) and the outer surface of the sharpening knife (3) are in contact with each other, the sharpening knife (3) is in the shape of a sphere as a whole, and the length of the positioning hole (5) is smaller than the diameter of the sharpening knife (3).

2. The cutting tool according to claim 1, wherein: The positioning hole (5) and the inner wall surface of the accommodating groove (4) intersect at a knife entry edge (7), and the positioning hole (5) and the outer surface of the knife body (1) intersect at a knife exit edge (8). The diameter of the knife entry edge (7) is larger than the diameter of the sharpening knife (3), and the diameter of the knife exit edge (8) is smaller than the diameter of the sharpening knife (3).

3. The cutting tool according to claim 2, wherein: The blade inlet (7) is circular.

4. The cutting tool according to claim 2, wherein: The knife edge (8) is circular.

5. The cutting tool according to claim 1, wherein: The central axis of the limiting pin (6) and the central axis of the positioning hole (5) are perpendicular to each other.

6. The cutting tool according to claim 1, wherein: One end of the limit pin (6) is provided with a cover platform (9), and the other end of the limit pin (6) is provided with a slot, in which an opening retaining ring (10) is set. The cover platform (9) and the opening retaining ring (10) are both attached to the outer surface of the knife body (1).

7. The cutting tool according to claim 6, wherein: The blade body (1) is also threadedly connected to a bolt (11), and the bolt (11) passes through the opening retaining ring (10).

8. The cutting tool according to claim 7, wherein: The number of the bolts (11) is two.

9. The cutting tool according to claim 1, wherein: A cooling hole (12) is also provided in the blade body (1), one end of the cooling hole (12) is connected to the inner wall surface of the accommodating groove (4), and the other end of the cooling hole (12) is connected to the outer surface of the blade body (1), and the positioning hole (5) and the cooling hole (12) are opposite to each other.

10. The cutting tool according to claim 1, 2 or 9, wherein: The knife body (1) comprises a knife rod (13) and a knife head (14); the accommodating groove (4) and the positioning hole (5) are both arranged on the knife head (14); and the knife rod (13) is in the shape of a cylinder or a rectangular parallelepiped as a whole.

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