Flake graphite milling cutter with wear sensing mechanism

Abstract

The utility model relates to the field of generators, in particular to a flake graphite milling cutter with a wear sensing mechanism, which comprises a cutter head and a cutter bar, the cutter head is provided with a cutter face and a cutting edge arranged below the cutter face, a copper wire is arranged on the cutter face and embedded into the cutter face, and the minimum distance between the copper wire and the cutting edge is 0.2-0.8 mm; the copper wire is wrapped with an insulating layer; the cutter bar is sleeved with two sliding rings, the axes of the sliding rings coincide with the rotating axis of the cutter bar, and an insulating sleeve is arranged between one sliding ring and the cutter bar; the two ends of the copper wire are conductively connected with the two slip rings respectively; when the cutting edge is abraded, the copper wire is abraded off, and when the copper wire is disconnected, the detector is triggered to warn workers that the cutting edge of the milling cutter is excessively abraded.

Description

Technical Field

[0001] This utility model relates to the field of graphite workpiece processing, and in particular to a chip cleaning system. Background Technology

[0002] High-density, high-strength carbon graphite material is a material with advantages such as high strength, low resistivity, good thermal shock resistance, high temperature resistance, oxidation resistance, and high heating efficiency, making it the preferred heating material in single-crystal silicon furnace heaters.

[0003] However, when high-density, high-strength carbon graphite materials are milled, the milling cutter head is prone to wear. If the graphite parts are machined when the milling cutter is worn, it will not only affect the service life of the milling cutter, but may also cause unevenness, roughness, or even burrs on the machined surface. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution;

[0006] A thin-film graphite end mill with a wear sensing mechanism includes a cutter head and a cutter shank, the cutter head having a cutter face and a cutting edge disposed below the cutter face;

[0007] It also includes a copper wire, which is embedded in the blade surface, and the minimum distance between the copper wire and the cutting edge is 0.2-0.8 mm;

[0008] The copper wire is wrapped with an insulating layer;

[0009] Two slip rings are fitted on the tool holder, and the axis of the slip rings coincides with the rotation axis of the tool holder. An insulating sleeve is provided between one of the slip rings and the tool holder.

[0010] The two ends of the copper wire are electrically connected to the two slip rings respectively.

[0011] It also includes a detector for detecting the continuity of the circuit, such as a relay switch or a circuit breaker indicator. The detection switch is connected to two slip rings through a brush head, and the two slip rings connect the two ends of the copper wire to the detector.

[0012] The above design incorporates a copper wire on the cutting edge. When the cutting edge wears down, the copper wire breaks, triggering a detector that warns the operator that the milling cutter's cutting edge is excessively worn and requires re-grinding or replacement. This prevents the excessively worn cutting edge from continuing to cut high-density, high-strength carbon graphite materials, ensuring the milling cutter's lifespan and the quality of the machined surface. The copper wire is wrapped with an insulating layer to prevent it from forming a conductive circuit with the milling cutter, thus affecting the detection effect. An insulating sleeve on a slip ring ensures that the detector's wiring ends are electrically connected to the copper wire's ends. When the copper wire breaks, the detector can accurately detect the breakage and precisely indicate when the cutting edge is worn.

[0013] Preferably, the milling cutter has a channel, called a flushing channel, which has an inlet and an outlet. The inlet is located on the top surface of the cutter shank, and the outlet is located around the periphery of the cutter head.

[0014] The center of the inlet coincides with the rotation center of the tool holder;

[0015] The outlet faces the cutting edge. A flushing channel is provided, and the air inlet of the flushing channel can be connected to high-pressure air or cutting fluid to flush away graphite chips, reduce the accumulation of graphite chips, prevent graphite chips from clogging the tool head and damaging the copper wire, and also effectively prevent the cutting edge temperature from being too high, damaging the tool head structure or destroying the insulation layer.

[0016] Preferably, the cutting edge has at least four cutting edges, with a flushing channel outlet between every two adjacent cutting edges. Each cutting edge has an embedded copper wire, and the copper wires on all cutting edges are connected in series. The copper wire on each cutting edge passes through an outlet into the flushing channel. Each cutting edge has a corresponding outlet for cooling with cutting fluid or high-pressure gas, extending the service life of the cutting edge.

[0017] Preferably, the distance between the outlet and the cutting edge is 5-8 mm. This ensures that the cutting fluid or high-pressure air ejected from the outlet can reach the cutting edge, extending the service life of the cutting edge.

[0018] Preferably, the tool holder also has another channel, called a wire passage, which includes an opening located on the circumferential side of the tool holder between two slip rings. The wire passage is connected to the flushing channel. The copper wire enters the flushing channel through the outlet, and then its two ends are electrically connected to the two slip rings respectively through the wire passage. The wire passage facilitates the copper wire's passage from the flushing channel outlet into the end mill's interior and then through the wire passage to the slip rings, reducing the exposed copper wire and preventing it from being cut by graphite chips.

[0019] Preferably, a plug is provided at the opening of the wire passage, and the plug is made of rubber. The plug prevents cutting fluid or high-pressure air from directly affecting the slip ring and thus its service life.

[0020] Preferably, the insulating layer wrapping the copper wire is made of polytetrafluoroethylene (PTFE); the insulating sleeve between the slip ring and the tool holder is also made of PTFE. PTFE has strong high-temperature resistance, a smooth surface, and good anti-stick properties, preventing graphite chips from sticking together and reducing their accumulation.

[0021] Preferably, the copper wire is composed of at least five copper conductors. This reduces the possibility of accidental cutting of the copper wire by graphite chips.

[0022] Preferably, the cutter head and cutter shank are an integral structure. Two slip rings are sleeved on the cutter shank, with the slip ring without an insulating sleeve being electrically connected to the cutter shank. One end of the copper wire is connected to the slip ring with an insulating sleeve, and the other end is fixedly connected to the cutter head. Only one end of the copper wire needs to be connected to the slip ring with the insulating sleeve, while the other end is electrically connected to the slip ring without an insulating sleeve via the milling cutter. This reduces the number of connection points of the copper wire and decreases the possibility of accidental breakage. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 A schematic diagram of the overall structure of a thin-film graphite end mill with a wear sensing mechanism according to an embodiment of this utility model;

[0025] Figure 2 A thin-film graphite end mill with a wear sensing mechanism, as described in one embodiment of this utility model. Figure 1 A cross-sectional structural diagram. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0030] Example 1

[0031] Reference Figure 1 and Figure 2 A thin-film graphite end mill with a wear sensing mechanism includes a cutter head 1 and a cutter shank 2. The cutter head 1 has a cutter face 11 and a cutting edge 12 disposed under the cutter face 11.

[0032] It also includes a copper wire 3, which is embedded in the cutting face 11. The minimum distance between the copper wire 3 and the cutting edge 12 is 0.2-0.8 mm. The copper wire 3 is wrapped with an insulating layer. Two slip rings 4 are fitted on the tool holder 2. The axis of the slip ring 4 coincides with the rotation axis of the tool holder 2. An insulating sleeve 41 is provided between one of the slip rings 4 and the tool holder 2. The two ends of the copper wire 3 are electrically connected to the two slip rings 4 respectively. It also includes a detector for detecting the continuity of the circuit, such as a relay switch or a circuit breaker indicator. The detection switch is connected to the two slip rings 4 through a brush head. The two slip rings 4 connect the two ends of the copper wire 3 to the detector. By setting a copper wire 3 on the cutting edge 11, the copper wire 3 will be worn off when the cutting edge 12 wears. When the copper wire 3 is broken, the detector is triggered, warning the operator that the cutting edge 12 of the milling cutter is worn too much and needs to be re-grinded or the milling cutter replaced. This prevents the worn cutting edge 12 from continuing to cut high-density and high-strength carbon graphite materials, ensuring the service life of the milling cutter and the quality of the machined surface. The copper wire 3 is wrapped with an insulating layer to ensure that the copper wire 3 does not form a conductive circuit with the milling cutter and affect the detection effect. An insulating sleeve 41 is set on a slip ring 4 to ensure that the two ends of the detector's wiring are electrically connected to the two ends of the copper wire. When the copper wire is broken, the detector can accurately detect the breakage of the copper wire and accurately indicate when the cutting edge 12 is worn.

[0033] The insulation layer surrounding the copper wire 3 is made of polytetrafluoroethylene (PTFE); the insulating sleeve 41 between the slip ring 4 and the tool holder 2 is also made of PTFE. PTFE has strong high-temperature resistance, a smooth surface, and good anti-stick properties, preventing graphite chips from sticking together and reducing their accumulation.

[0034] The copper wire 3 is composed of at least five copper conductors. This reduces the possibility of accidental cutting of the copper wire 3 by graphite chips.

[0035] The cutter head 1 and the cutter shank 2 are an integral structure. Two slip rings 4 are sleeved on the cutter shank 2. The slip ring 4 without an insulating sleeve 41 is electrically connected to the cutter shank 2. One end of the copper wire 3 is connected to the slip ring 4 with an insulating sleeve 41, and the other end is fixedly connected to the cutter head 1. Only one end of the copper wire 3 needs to be connected to the slip ring 4 with an insulating sleeve 41, and the other end is electrically connected to the slip ring 4 without an insulating sleeve 41 through the milling cutter. This reduces the number of connection points of the copper wire 3 and reduces the possibility of the copper wire 3 being accidentally disconnected.

[0036] During use, after the milling cutter is installed, the detector is fixed on the fixed housing of the machining tool. Then, it is connected to two slides through two brushes. When the cutting edge 12 wears, the copper wire 3 will be worn off. When the copper wire 3 is broken, the detector is triggered, warning the operator that the cutting edge 12 of the milling cutter is worn too much and needs to be re-grinded or the milling cutter replaced. This prevents the excessively worn cutting edge 12 from continuing to cut high-density, high-strength carbon graphite materials, ensuring the service life of the milling cutter and the quality of the machined surface.

[0037] Example 2

[0038] Reference Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0039] The milling cutter has a channel called the flushing channel 5, which has an inlet 51 and an outlet 52. The inlet 51 is located on the top surface of the cutter shank 2, and the outlet 52 is located around the periphery of the cutter head 1. The center of the inlet 51 coincides with the rotation center of the cutter shank 2, and the outlet 52 faces the cutting edge 12. The flushing channel 5 can be connected to high-pressure air or cutting fluid to flush away graphite chips, reduce their accumulation, prevent them from clogging the cutter head 1 and damaging the copper wire 3, and also effectively prevent the cutting edge 12 from overheating and damaging the cutter head 1 structure or the insulation layer.

[0040] The cutting edge 12 is provided with at least four cutting edges 11, and an outlet 52 of a flushing channel 5 is provided between every two adjacent cutting edges 11. A copper wire 3 is embedded in each cutting edge 11, and the copper wire 3 on each cutting edge 11 passes through the outlet 52 into the flushing channel 5. Each cutting edge 12 has a corresponding outlet 52 to extend the service life of the cutting edge 12.

[0041] The distance between the outlet 52 and the cutting edge 12 is 5-8mm. This ensures that the cutting fluid or high-pressure gas sprayed from the outlet 52 can reach the cutting edge 12, thereby cooling the cutting edge 12 and extending its service life.

[0042] The tool holder 2 also has another channel, called the wire passage channel 6, which is located between the two slip rings 4. The wire passage channel 6 includes an opening located on the circumferential side of the tool holder, between the two slip rings 4, and is connected to the flushing channel 5. The copper wire 3 enters the flushing channel 5 through the outlet 52, and then its two ends are connected to the two slip rings 4 respectively through the wire passage channel 6. The wire passage channel facilitates the copper wire 3 to pass from the outlet 52 of the flushing channel 5 into the end mill and then connect to the slip rings 4 through the wire passage channel 6, reducing the exposure of the copper wire 3 and preventing it from being cut by graphite chips. The copper wire connection point is located between the two slip rings to reduce the possibility of accidental contact with the copper wire.

[0043] A plug 61, made of rubber, is installed at the opening of the cable passage 6. The plug 61 is used to prevent cutting fluid or high-pressure air from directly affecting the slip ring 4 and thus affecting its service life.

[0044] In use, the cutting fluid is connected to the machine tool's cutting fluid pipeline through the flushing channel 5. The cutting fluid is injected into the flushing channel 5 through the inlet 51 and sprayed out from the outlet 52 onto the cutting face 11 of the milling cutter. This cools the cutting edge 12 to prevent the insulation layer of the copper wire 3 from being damaged by heat, thus extending the service life of the milling cutter. It also washes away graphite chips to prevent them from accumulating in the gaps between the cutting faces 11, preventing the copper wire 3 from being cut by the chips. This ensures that the copper wire 3 is not accidentally touched and that it can only be broken accurately when the cutting edge 12 wears out, thereby triggering the detector to remind the operator.

[0045] It should be noted that the above description illustrates the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A thin graphite milling cutter with wear sensing mechanism, comprising a cutter head and a cutter shaft, the cutter head having a cutter face and a cutting edge arranged below the cutter face, characterized in that: a copper wire is embedded in the cutter face, the minimum distance between the copper wire and the cutting edge being 0.2-0.8mm; the copper wire is wrapped with an insulating layer; two slip rings are sleeved on the cutter shaft, the shaft center of the slip rings coincides with the rotation center of the cutter shaft, and an insulating sleeve is arranged between one of the slip rings and the cutter shaft; the two ends of the copper wire are respectively in conductive connection with the two slip rings.

2. The milling cutter is provided with a channel, referred to as a flushing channel, having an inlet and an outlet, the inlet is arranged on the top surface of the cutter shaft, and the outlet is arranged on the periphery of the cutter head.

3. The center of the inlet coincides with the rotation center of the cutter shaft.

4. The outlet is directed towards the cutting edge.

5. At least four cutter faces are arranged, an outlet of a flushing channel is arranged between every two adjacent cutter faces, a copper wire is embedded in each cutter face, the copper wires on all cutter faces are connected in series, and the copper wire on each cutter face is passed into the flushing channel through the outlet.

2. The wafer graphite milling cutter having a wear sensing mechanism according to claim 1, characterized by:

6. The distance between the outlet and the cutting edge is 5-8mm.

7. Another channel, referred to as a wire passing channel, is arranged on the cutter shaft, the wire passing channel comprises an opening arranged on the lateral surface of the cutter shaft between the two slip rings, and the wire passing channel is connected with the flushing channel.

8. The copper wire is passed into the flushing channel through the outlet, and then the two ends of the copper wire are respectively in conductive connection with the two slip rings through the wire passing channel.

3. The wafer graphite milling cutter having a wear sensing mechanism according to claim 2, characterized by:

9. A plug is arranged at the opening of the wire passing channel, and the plug is made of rubber material.

4. The wafer graphite milling cutter having a wear sensing mechanism according to claim 2, characterized by:

10. The insulating layer wrapping the copper wire is made of polytetrafluoroethylene material.

5. The wafer graphite cutter having a wear sensing mechanism according to claim 2, characterized by:

11. The insulating sleeve between the slip ring and the cutter shaft is made of polytetrafluoroethylene material.

12. The cutter head and the cutter shaft are of an integrated structure, the two slip rings sleeved on the cutter shaft are in conductive connection with the cutter shaft without an insulating sleeve.

6. The wafer graphite cutter having a wear sensing mechanism according to claim 5, characterized by:

13. One end of the copper wire is connected to the slip ring with an insulating sleeve, and the other end is fixedly connected with the cutter head.

7. The wafer graphite cutter having a wear sensing mechanism according to claim 1, characterized by: ​ ​ 8. The wafer graphite cutter having a wear sensing mechanism according to claim 1, characterized by: ​ ​

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