Surface polishing cutter

Abstract

The invention provides a surface polishing cutter which comprises a cutter body, a bearing and a grinding cutter, a containing groove and a positioning hole are formed in the outer surface of the cutter body, the positioning hole enables the inner wall face of the containing groove to be communicated with the outer surface of the cutter body, the grinding cutter is sleeved with the positioning hole, and an inner ring of the bearing is hinged into 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 invention belongs to the technical field of cutting tools, and in particular relates to a surface polishing cutting tool. Background Art

[0002] At present, cutting processing technology is still the main processing method for mechanical products, among which 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. The conventional grinding process generally uses a grinder as a processing equipment and a grinding wheel as a surface polishing tool. During grinding, the workpiece usually rotates with the spindle of the grinder, and the surface polishing tool rotates with the tool shaft on the grinder. The relative movement between the workpiece and the surface polishing tool is used to grind and remove the coarser material on the workpiece surface. The grinding process is also accompanied by the wear of the grinding wheel. When the surface of the grinding wheel is severely worn, the entire surface polishing tool needs to be replaced in time.

[0003] In the prior art, a 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, a plurality of tool blocks and a carbide blade, wherein the plurality of tool blocks are mounted 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 covers, and the end covers are 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, which replaces the previous multiple grinding and repair of the hob blade, saves processing preparation time and improves labor productivity. However, during the grinding process, when the surface of the surface polishing tool is slightly worn, the operator cannot easily detect it with the naked eye, but it will cause the external dimensions of the surface polishing tool to change, and the positioning dimensions of the surface polishing tool relative to the workpiece will also change accordingly. If the entire surface polishing tool is replaced, after the new surface polishing tool is installed, it is often necessary to readjust the positioning position of the surface polishing 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 be affected during the grinding process due to the inconsistent external dimensions of the blades. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a surface polishing tool.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a surface polishing 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 a limit pin, the outer ring of the bearing and the outer surface of the grinder are abutted against each other, the grinder is in the shape of a sphere 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 a knife entry, and the positioning hole intersects with the outer surface of the knife body at a knife exit. The diameter of the knife entry is larger than the diameter of the sharpening knife, and the diameter of the knife exit is smaller than the diameter of the sharpening knife.

[0008] The knife 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] A cover platform is provided at one end of the limit pin, and a clamping groove is provided at the other end of the limit pin. An opening retaining ring is sleeved in the clamping groove. The cover platform and the opening retaining ring are both attached to 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 also provided in the blade body, one end of the cooling hole is connected to the inner wall surface of the accommodating groove, 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 comprises 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 effect of the present invention is that: by adopting the technical scheme of the present invention, during the grinding process, the operator can easily detect whether the grinding cutter is worn by 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, since the grinding cutter has a small outer dimension, 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, since the outer dimension of the grinding cutter is small, even if the surface of the grinding cutter is slightly worn, the positioning dimension between the grinding cutter and the workpiece changes little, which is conducive to ensuring the grinding process accuracy, and the outer dimension of the grinding cutter is small, and 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 the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of the present invention;

[0018] Figure 2 According to the present invention Figure 1 Sectional view cut along the AA plane;

[0019] Figure 3 It is a front view of the knife body of the present invention;

[0020] Figure 4 It is a front view of the open retaining ring of the present invention;

[0021] Figure 5 It is a front view of the limit pin of the present invention.

[0022] In the figure: 1- knife body, 2- bearing, 3- knife sharpening, 4- receiving groove, 5- positioning hole, 6- limiting pin, 7- knife inlet, 8- knife outlet, 9- cover, 10- opening retaining ring, 11- bolt, 12- cooling hole, 13- knife rod, 14- knife 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 description.

[0024] like Figures 1 to 5 As shown, the present invention provides a surface polishing tool, including a tool body 1, a bearing 2 and a grinder 3. The outer surface of the tool 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 tool 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 by 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 in the shape of a sphere 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 observing whether there is a gap between the grinding cutter and the outer surface of the bearing. After replacing the damaged grinding cutter, on the one hand, since the grinding cutter has a small outer dimension, 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, since the outer dimension of the grinding cutter is small, even if the surface of the grinding cutter is slightly worn, the positioning dimension of the grinding cutter relative to the workpiece changes little, which is conducive to ensuring the grinding accuracy, and the outer dimension of the grinding cutter is small, and 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 the labor intensity.

[0026] Specifically, the positioning hole 5 intersects with the inner wall surface of the accommodating groove 4 at the knife entry 7, and the positioning hole 5 intersects with the outer surface of the knife body 1 at the knife exit 8. The diameter of the knife entry 7 is larger than the diameter of the sharpening knife 3, and the diameter of the knife exit 8 is smaller than the diameter of the sharpening knife 3. Preferably, the knife entry 7 is circular, and the knife exit 8 is 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 limit pin 6, and a slot is provided at the other end of the limit pin 6. An open retaining ring 10 is installed in the slot. The cover 9 and the open retaining ring 10 are both attached to the outer surface of the cutter body 1. The cutter body 1 is also screwed with a bolt 11, and the bolt 11 passes through the open retaining ring 10. Preferably, the number of bolts 11 is two. This further ensures the relative assembly position between the bearing 2, the grinding knife 3 and the workpiece, and ensures the grinding accuracy.

[0028] In addition, a cooling hole 12 is provided in the cutter 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 cutter body 1, and the positioning hole 5 and the cooling hole 12 are opposite to each other. By adopting the technical solution of the present invention, coolant can be fed to the surface of the grinding knife 3 through the cooling hole 12, and cutting heat can be removed in time during the grinding process, which helps to ensure the grinding accuracy.

[0029] In addition, the blade body 1 includes a blade rod 13 and a blade head 14 , the receiving groove 4 and the positioning hole 5 are both arranged on the blade head 14 , and the blade rod 13 is in a cylindrical or rectangular shape as a whole.

Claims

1. A surface polishing tool, characterized in that: The invention comprises a knife body (1), a bearing (2) and a sharpening knife (3); the outer surface of the knife body (1) is provided with a receiving groove (4) and a positioning hole (5); 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); the sharpening knife (3) is sleeved in the positioning hole (5); the inner ring of the bearing (2) is hinged in the receiving groove (4) by 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 surface polishing tool according to claim 1, characterized in that: The positioning hole (5) and the inner wall surface of the accommodating groove (4) intersect at a knife entry opening (7), and the positioning hole (5) and the outer surface of the knife body (1) intersect at a knife exit opening (8). The diameter of the knife entry opening (7) is larger than the diameter of the sharpening knife (3), and the diameter of the knife exit opening (8) is smaller than the diameter of the sharpening knife (3).

3. The surface polishing tool according to claim 2, characterized in that: The knife inlet (7) is circular.

4. The surface polishing tool according to claim 2, characterized in that: The knife edge (8) is circular.

5. The surface polishing tool according to claim 1, characterized in that: The central axis of the limiting pin (6) and the central axis of the positioning hole (5) are perpendicular to each other.

6. The surface polishing tool according to claim 1, characterized in that: A cover platform (9) is provided at one end of the limit pin (6), and a clamping groove is provided at the other end of the limit pin (6). An opening retaining ring (10) is installed in the clamping groove. Both the cover platform (9) and the opening retaining ring (10) are attached to the outer surface of the knife body (1).

7. The surface polishing tool according to claim 6, characterized in that: The blade body (1) is also threadedly connected to a bolt (11), and the bolt (11) passes through the open retaining ring (10).

8. The surface polishing tool according to claim 7, characterized in that: The number of the bolts (11) is two.

9. The surface polishing tool according to claim 1, characterized in that: The blade body (1) is also provided with a cooling hole (12), 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 surface polishing tool according to claim 1, 2 or 9, characterized in that: 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 cuboid as a whole.

Images