Ball cutter with self-lubricating structure

Abstract

This utility model belongs to the field of ball end mill technology, and particularly relates to a ball end mill with a self-lubricating head structure. Addressing the problem of existing ball end mills requiring lubricant assistance, the following solution is proposed: A tool shank is included, with a tool head fixedly mounted at its bottom end. A lubrication mechanism is provided on the outside of the tool shank. The lubrication mechanism includes a sleeve block slidably connected to the outside of the tool shank. The sleeve block is rotatably connected to the sleeve via a high-speed ball bearing, allowing the sleeve to remain stable during tool shank rotation. The sleeve is then connected to a connecting pipe via a connector. The connector and delivery pipe are connected to a pump in an external fluid supply structure, enabling the delivery of lubricant into the sleeve. Finally, the lubricant is guided through a connector and an outlet pipe, and sprayed out through the outlet to lubricate the tool head. This forms a lubricating film, reducing the coefficient of friction, and removes heat from the cutting area through heat conduction and convection, lowering the cutting temperature, reducing tool thermal deformation, inhibiting the formation of built-up edge and burrs, and quickly washing away chips.

Description

Technical Field

[0001] This utility model relates to a ball cutter, specifically a ball cutter with a self-lubricating cutter head structure, and belongs to the field of ball cutter technology. Background Technology

[0002] A ball end mill is a cutting tool used for milling operations. Its main characteristic is its hemispherical end, which allows for multi-directional cutting, making it particularly suitable for machining complex curved surfaces and contours. It is widely used in mold making, for machining cavities and cores of various molds, such as injection molds and die-casting molds. It can accurately machine complex curved shapes, meeting the precision and surface quality requirements of molds.

[0003] In existing technologies, such as the ball end mill disclosed in publication number CN218638639U, the cutting edge surface is polished. Specifically, grinding with a 600-1200 grit grinding wheel is used to improve the surface finish of the cutting edge. The smooth cutting edge of the ball end mill reduces the problem of chip adhesion during cutting, resulting in a good surface quality for the machined workpiece. Existing ball end mills often have a coating applied to the cutting edge surface to improve tool strength, reduce cutter temperature, or reduce chip adhesion to the tool. However, in this solution, by optimizing the cutting edge structure, the need for coating on the cutting edge is avoided, reducing cost investment. Optimizing only the cutting edge structure is sufficient for machining aluminum alloy materials.

[0004] However, in implementing the relevant technology, the ball end mill designed above has the following problems: Although the existing technology can avoid chip adhesion, in the actual use process, when the end mill rubs against the workpiece at high speed during operation, it will generate a certain amount of temperature. The end mill is very prone to deformation under high temperature, so it is necessary to continuously provide lubricant. In view of this, a ball end mill with a self-lubricating cutter head structure is provided to overcome the above defects. Utility Model Content

[0005] This invention addresses the technical problem of milling cutters generating a certain amount of heat during high-speed friction with the workpiece, which can easily cause deformation and necessitates the continuous supply of lubricating fluid. It provides a ball end mill with a self-lubricating cutter head structure.

[0006] The present invention achieves the above objectives through the following technical solution: a ball cutter with a self-lubricating cutter head structure, comprising a cutter bar, wherein a cutter head is fixedly mounted at the bottom end of the cutter bar, and a lubrication mechanism is provided on the outside of the cutter bar;

[0007] The lubrication mechanism includes a sleeve block, which is slidably connected to the outside of the tool holder. A high-speed ball bearing is rotatably connected to the outer wall of the sleeve block. A sleeve is fixedly installed on the outer wall of the high-speed ball bearing. A connection port is opened on the outer wall of the sleeve. A connecting pipe extends through the inside of the connection port. A connector extends through the inside of the connecting pipe. A delivery pipe is fixedly installed at one end of the connector.

[0008] As a further embodiment of this utility model: a connector extends from the bottom end of the sleeve, and a liquid outlet pipe is fixedly installed at the bottom end of the connector, and a liquid outlet head is fixedly installed at the bottom end of the liquid outlet pipe.

[0009] As a further improvement of this utility model: the connecting pipe is threaded to the connecting port, and the connecting pipe is threaded to the connecting head.

[0010] As a further improvement of this utility model: the connector is threadedly connected to the sleeve, and the sleeve is connected to the liquid outlet pipe.

[0011] As a further improvement of this utility model: the tool holder is provided with a connecting mechanism inside, the connecting mechanism includes a sliding groove, the sliding groove is opened on one side of the outer wall sleeve block of the tool holder, and a through hole is opened inside the tool holder.

[0012] As a further embodiment of this utility model: a slider is slidably connected inside the slide groove, and a limit block is fixedly installed at one end of the slider that passes through the slide groove; a fixing ring is slidably connected above the outer sleeve of the tool bar.

[0013] As a further improvement of this utility model: the limiting block extends into the interior of the through hole, and a sliding structure is formed between the limiting block and the tool bar.

[0014] The beneficial effects of this utility model are as follows: the sleeve block is rotatably connected to the sleeve via a high-speed ball bearing, allowing the sleeve to remain stable during the rotation of the tool holder. After being connected to the connecting pipe via the connecting port, the connecting head and the conveying pipe are connected to the pump of the external liquid supply structure, which can deliver lubricating fluid into the sleeve. Finally, the fluid is guided through the connecting head and the liquid outlet pipe and sprayed out through the liquid outlet head to lubricate the tool head. This can form a lubricating film to reduce the coefficient of friction and remove the heat of the cutting area through heat conduction and convection, thereby reducing the cutting temperature, reducing the thermal deformation of the tool, inhibiting the formation of built-up edge and burrs, and quickly washing away the chips.

[0015] The sliding block, which is fixed by the slide groove, slides and drives the limiting block to slide along the through hole. The slide groove limits the slider, allowing the sleeve to rotate with the tool holder. At the same time, the fixed ring, which is threaded to the tool holder, adjusts its position and abuts against the sleeve to prevent the sleeve from becoming loose and affecting the connection between the sleeve and the connecting pipe. This allows the tool holder and the lubrication mechanism to be quickly assembled, facilitating disassembly, maintenance and cleaning later, or replacement of the tool head if it is damaged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

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

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

[0019] Figure 4 This is a schematic diagram of the connector structure of this utility model.

[0020] In the diagram: 1. Tool holder; 2. Tool head; 3. Lubrication mechanism; 301. Sleeve block; 302. High-speed ball bearing; 303. Sleeve; 304. Connecting port; 305. Connecting pipe; 306. Connecting head; 307. Delivery pipe; 308. Connecting head; 309. Liquid outlet pipe; 310. Liquid outlet head; 4. Connecting mechanism; 401. Slide groove; 402. Through hole; 403. Sliding block; 404. Limiting block; 405. Fixing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 4As shown, a ball cutter with a self-lubricating cutter head structure includes a cutter shank 1, a cutter head 2 fixedly mounted at the bottom end of the cutter shank 1, and a lubrication mechanism 3 disposed on the outside of the cutter shank 1. The lubrication mechanism 3 includes a sleeve block 301, which is slidably connected to the outside of the cutter shank 1. A high-speed ball bearing 302 is rotatably connected to the outer wall of the sleeve block 301. A sleeve 303 is fixedly mounted on the outer wall of the high-speed ball bearing 302. A connection port 304 is provided on the outer wall of the sleeve 303. A connecting pipe 305 extends through the inside of the connection port 304. A connector 306 extends through the inside of the connecting pipe 305. A delivery pipe 307 is fixedly mounted at one end of the connector 306. A connecting head 308 extends through the bottom end of the sleeve 303. A liquid outlet pipe 309 is fixedly mounted at the bottom end of the connecting head 308. A liquid outlet head 310 is fixedly mounted at the bottom end of the liquid outlet pipe 309. The connecting pipe 305 is connected to the connecting head 306. Interface 304 is threaded, connecting pipe 305 is threaded to connector 306, connector 308 is threaded to sleeve 303, and sleeve 303 is connected to outlet pipe 309; sleeve block 301 is rotatably connected to sleeve 303 via high-speed ball bearing 302, so that sleeve 303 remains stable after being connected to connecting pipe 305 via connector 304 during the rotation of tool holder 1. Connector 306 and delivery pipe 307 are connected to the pump of external liquid supply structure, which can deliver lubricating fluid into sleeve 303. Finally, it is guided by connector 308 and outlet pipe 309 and sprayed out through outlet head 310 to lubricate tool head 2, which can form a lubricating film to reduce the coefficient of friction, and remove heat from the cutting area through heat conduction and convection, reduce cutting temperature, reduce tool thermal deformation, inhibit the formation of built-up edge and burrs, and quickly wash away chips. Example 2

[0023] In addition to all the technical features in Embodiment 1, this embodiment also includes: a connecting mechanism 4 is provided inside the tool holder 1. The connecting mechanism 4 includes a slide groove 401, which is formed on one side of the outer sleeve block 301 of the tool holder 1. A through hole 402 is formed inside the tool holder 1. A slider 403 is slidably connected inside the slide groove 401. A limiting block 404 is fixedly installed at one end of the slider 403 that passes through the slide groove 401. A fixing ring 405 is slidably connected above the outer sleeve block 301 of the tool holder 1. The limiting block 404 passes through the through hole 402. The limiting block 404 and the tool holder 1 form a sliding structure. The slide block 403, which is fixed to the sleeve block 301, slides through the slide groove 401, and can drive the limit block 404 to slide along the through hole 402. The slide groove 401 limits the slider 403, allowing the sleeve block 301 to rotate with the drive of the tool bar 1. At the same time, the fixed ring 405, which is threadedly connected to the tool bar 1, is adjusted and then abuts against the sleeve block 301 to press it tight and prevent the sleeve block 301 from becoming loose, which would affect the connection between the sleeve 303 and the connecting pipe 305. This allows the tool bar 1 and the lubrication mechanism 3 to be quickly assembled, which is convenient for disassembly, maintenance and cleaning in the later stage, or for replacing the tool head 2 if it is damaged.

[0024] Working principle: First, the slider 403, fixed by the sleeve block 301, slides along the groove 401, allowing the limit block 404 to slide along the through hole 402. Then, it is threadedly connected to the tool holder 1 via the fixing ring 405, thus abutting against the upper part of the sleeve block 301 for fixation, allowing the lubrication mechanism 3 and the tool holder 1 to assemble quickly. The sleeve block 301 is rotatably connected to the sleeve 303 via the high-speed ball bearing 302. The sleeve 303 is threadedly connected to the connecting pipe 305 via the connecting port 304, and threadedly connected to the conveying pipe 307 via the hollow connecting head 306. The conveying pipe 307 is connected to the external lubricating fluid supply equipment, and the fluid is drawn in by the pump. The lubricant is supplied through the sleeve 303 and facilitates disassembly for maintenance and cleaning. With the cooperation of the high-speed ball bearing 302, the sleeve block 301 can rotate with the tool holder 1 while preventing the sleeve 303 from rotating, thus ensuring stable delivery of lubricant. The hollow connector 308 and the outlet pipe 309 are integrated, and the connector 308 is inserted into the sleeve 303 and threadedly connected, thereby guiding the lubricant into the outlet pipe 309 and spraying it onto the tool head 2 through the outlet head 310 for lubrication. This can reduce cutting temperature, reduce tool wear, improve machining surface quality, and flush away chips.

[0025] It will be apparent to those skilled in the art that this invention for improving the quality of machined surfaces is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ball cutter with a self-lubricating cutting head structure, comprising a cutting shank (1), characterized in that: The bottom end of the cutter bar (1) is fixedly installed with a cutter head (2), and a lubrication mechanism (3) is provided on the outside of the cutter bar (1). The lubrication mechanism (3) includes a sleeve (301), which is slidably connected to the outside of the tool holder (1), and a high-speed ball bearing (302) is rotatably connected to the outer wall of the sleeve (301). A sleeve (303) is fixedly installed on the outer wall of the high-speed ball bearing (302), and a connection port (304) is opened on the outer wall of the sleeve (303). A connecting pipe (305) extends through the inside of the connection port (304), and a connector (306) extends through the inside of the connecting pipe (305). A conveying pipe (307) is fixedly installed at one end of the connector (306). The tool holder (1) is provided with a connecting mechanism (4), which includes a sliding groove (401). The sliding groove (401) is opened on one side of the outer wall sleeve block (301) of the tool holder (1), and a through hole (402) is opened inside the tool holder (1).

2. The ball end mill with a self-lubricating tip structure according to claim 1, characterized in that: The bottom end of the sleeve (303) has a connector (308) extending out, and the bottom end of the connector (308) is fixedly installed with a liquid outlet pipe (309), and the bottom end of the liquid outlet pipe (309) is fixedly installed with a liquid outlet head (310).

3. The ball end mill with a self-lubricating tip structure according to claim 1, characterized in that: The connecting pipe (305) is threaded to the connecting port (304), and the connecting pipe (305) is threaded to the connecting head (306).

4. The ball end mill with a self-lubricating tip structure according to claim 2, characterized in that: The connector (308) is threadedly connected to the sleeve (303), and the sleeve (303) is connected to the outlet pipe (309).

5. The ball end mill with a self-lubricating tip structure according to claim 1, characterized in that: The slide groove (401) is slidably connected to a slider (403), and a limit block (404) is fixedly installed at one end of the slide groove (401) through the slider (403). A fixing ring (405) is slidably connected above the outer sleeve block (301) of the tool bar (1).

6. The ball end mill with a self-lubricating tip structure according to claim 5, characterized in that: The limiting block (404) extends into the interior of the through hole (402), and the limiting block (404) and the tool bar (1) form a sliding structure.

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