A milling cutter assembly and milling apparatus

Abstract

This invention relates to a milling cutter assembly and a milling apparatus, comprising a cutter holder, a cutter disc fixed to the cutter holder, a cutting blade mounted on the cutter disc, a fluid reservoir ring fixed to the outer periphery of the cutter disc, a fluid reservoir cavity for containing cutting fluid inside the fluid reservoir ring, a nozzle connected to the outer part of the fluid reservoir ring, one end of the nozzle communicating with the fluid reservoir cavity, and the other end facing the rake face of the cutting blade, and multiple heat-conducting metal wires disposed between the nozzle and the rake face of the cutting blade to guide the cutting fluid to the cutting area of ​​the rake face of the cutting blade. The milling cutter assembly of this invention can effectively reduce the temperature of the cutting area during milling, improve the tool life and the surface quality of the milled product.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a milling cutter assembly and a milling processing device. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Milling accounts for a large proportion of large-scale mechanical production. With the rapid development of manufacturing technology, higher demands are being placed on the production efficiency of the manufacturing industry. Generally, increasing milling speed is chosen to improve production efficiency and meet these requirements. However, high-speed milling generates a large amount of cutting heat. This excess heat not only causes thermal damage to the machined material but also significantly reduces the tool life, severely impacting production efficiency.

[0004] Current cooling methods primarily involve pouring cooling, which uses a large amount of cutting fluid during milling to rapidly dissipate heat near the rake face and ensure tool life. However, during high-speed milling, the cutting fluid often fails to reach the cutting edge, preventing the rapid dissipation of cutting heat and rendering the area near the tool tip ineffective for cooling. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a milling cutter assembly and milling device that can reduce the temperature of the tool tip area during milling, thereby improving the tool life and the surface quality of the milled product.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide a milling cutter assembly, including a cutter shank, a cutter disc fixed to the cutter shank, a cutting blade disposed on the cutter disc, a liquid reservoir ring fixed to the outer periphery of the cutter disc, a liquid reservoir cavity for containing cutting fluid inside the liquid reservoir ring, a nozzle connected to the outer part of the liquid reservoir ring, one end of the nozzle communicating with the liquid reservoir cavity, and the other end facing the cutting face of the cutting blade, and a plurality of heat-conducting metal wires disposed between the nozzle and the cutting face of the cutting blade to guide the cutting fluid to the cutting area of ​​the cutting face of the cutting blade.

[0008] Optionally, the liquid storage ring is provided with a liquid inlet, which is connected to the liquid storage cavity inside the liquid storage ring.

[0009] Optionally, the liquid inlet is located on the inner side of the liquid storage ring.

[0010] Optionally, the liquid storage ring is provided with an exhaust port, which is connected to the liquid storage cavity inside the liquid storage ring.

[0011] Optionally, the vent is located on the inner part of the liquid storage ring.

[0012] Optionally, the liquid storage chamber is provided with multiple perforated baffles at equal intervals along the circumference to divide the internal space of the liquid storage chamber into multiple interconnected isolation chambers, and the through holes on adjacent perforated baffles are staggered.

[0013] Optionally, the blade's front face is provided with multiple insertion holes, through which a heat-conducting metal wire is inserted and connected to the blade's front face.

[0014] Optionally, the heat-conducting metal wire can be made of copper wire.

[0015] Optionally, the inner ring portion of the liquid storage ring is provided with multiple limiting blocks, and correspondingly, the outer periphery of the cutter disc is provided with multiple limiting grooves that match the limiting blocks. The limiting blocks are embedded in the limiting grooves to fix the liquid storage ring and the cutter disc.

[0016] Secondly, embodiments of the present invention provide a milling apparatus, which is provided with the milling cutter assembly described in the first aspect.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The milling cutter assembly of the present invention includes a liquid storage ring, a nozzle on the outer side of the liquid storage ring, a liquid storage chamber inside the liquid storage ring connected to the nozzle, the nozzle facing the rake face of the insert, and a heat-conducting metal wire between the nozzle and the rake face of the insert. As the liquid storage ring rotates with the cutter head, under the action of centrifugal force, the cutting fluid in the liquid storage chamber can be sprayed out from the nozzle, and the heat-conducting metal wire has a guiding effect on the cutting fluid, so that the cutting fluid can better enter the cutting area of ​​the rake face of the insert, enhancing the cooling effect of the cutting fluid and allowing the cutting heat to be quickly discharged.

[0019] 2. In the milling cutter assembly of the present invention, the heat-conducting metal wire is made of copper wire. Copper wire has better thermal conductivity than the cutting tool material. Even when the cutting fluid is insufficient, it can still quickly dissipate the heat generated during the cutting process, thereby rapidly reducing the temperature of the cutting area of ​​the cutting tool, thus reducing tool wear and improving the surface quality of the machined part.

[0020] 3. In the milling cutter assembly of the present invention, the liquid storage chamber is divided into multiple interconnected isolation chambers by multiple perforated baffles. During high-speed milling, the transfer effect of cutting fluid during high-speed rotation is enhanced, and the flow rate of cutting fluid is prevented from being too fast near the cavity wall and too slow away from the cavity wall, which would affect the discharge effect of cutting fluid and ensure stable discharge of cutting fluid.

[0021] 4. In the milling cutter assembly of the present invention, the inner part of the liquid storage ring is provided with an exhaust hole, which can maintain the air pressure balance in the liquid storage chamber, so that the cutting fluid is discharged only under the action of centrifugal force. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the liquid storage ring structure in Embodiment 1 of the present invention;

[0025] Figure 3 This is a vertical sectional view of the liquid storage ring in Embodiment 1 of the present invention;

[0026] Figure 4 This is a horizontal sectional view of the liquid storage ring in Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the blade structure in Embodiment 1 of the present invention;

[0028] Among them, 1. liquid storage ring, 2. copper wire, 3. blade, 4. liquid storage chamber, 5. liquid inlet, 6. exhaust port, 7. perforated baffle, 8. nozzle, 9. insertion hole, 10. limit block, 11. cutter disc, 12. cutter handle. Detailed Implementation

[0029] Example 1

[0030] This embodiment provides a milling cutter assembly, such as Figure 1 As shown, the tool includes a handle 12, a cutter head 11 fixed to the bottom of the handle 12, and a blade 3 disposed at the bottom of the cutter head 11. The structure and connection method of the handle 12, the cutter head 11 and the blade 3 can be achieved using existing technology, and will not be described in detail here.

[0031] In this embodiment, eight blades 3 are provided at the bottom of the cutter head 11. Figure 1 Only one blade 3 is shown as an example.

[0032] A liquid storage ring 1 is fixedly fitted around the outer periphery of the cutter head 11, such as... Figures 2-4 As shown, the liquid storage ring 1 is a circular ring structure with multiple limiting blocks 10 on its inner ring side. Correspondingly, the outer circumferential surface of the cutter head 11 is provided with limiting grooves corresponding to the limiting blocks 10. The limiting blocks 10 are embedded in the limiting grooves to fix the liquid storage ring 1 and the cutter head 11. The liquid storage ring 1 can move synchronously with the cutter head 11 and the cutter handle 12.

[0033] Preferably, two limiting blocks 10 are provided on the inner side of the liquid storage ring 1. The two limiting blocks 10 are arranged opposite each other, that is, the two limiting blocks 10 are arranged at a circumferential interval of 180° along the liquid storage ring, which matches the structure of the existing cutter head. Correspondingly, two limiting grooves are also provided on the existing cutter head.

[0034] The liquid storage ring 1 is a hollow ring structure with an internal cavity serving as a liquid storage chamber 4, which is used to contain cutting fluid.

[0035] Multiple baffles are arranged circumferentially inside the liquid storage chamber 4, which divide the liquid storage chamber 4 into multiple isolation chambers. The baffles are perforated baffles 7 with through holes, which connect the multiple isolation chambers to each other. The through holes of adjacent baffles are staggered, that is, the axes of the through holes of adjacent baffles are not on the same circumference.

[0036] By setting the perforated baffle 7, the transfer effect of cutting fluid during high-speed rotation can be enhanced, preventing the cutting fluid from flowing too fast near the cavity wall and too slow away from the cavity wall in the reservoir 4, which would affect the discharge effect of the cutting fluid.

[0037] The inner part of the liquid storage ring 1 is provided with a liquid inlet 5 at the top. The liquid inlet 5 is connected to the liquid storage cavity 4 and is used to add cutting fluid into the liquid storage cavity 4.

[0038] The inlet 5 is located at the top of the inner part of the reservoir ring 1. The inlet 5 is relatively large to facilitate the injection of cutting fluid. After the cutting fluid is added, the inlet is sealed with a sealing cap to prevent leakage during milling.

[0039] The inner part of the liquid storage ring 1 is also provided with multiple exhaust ports 6. The exhaust ports 6 are connected to the liquid storage chamber. The cutting fluid rotates and flows at high speed in the liquid storage ring, and the internal air pressure is easily unbalanced, which interferes with the flow of the cutting fluid. By setting the exhaust ports 6, the air pressure balance in the liquid storage chamber can be maintained, so that the cutting fluid can be discharged under the action of centrifugal force.

[0040] The number of exhaust ports 6 can be set according to actual needs, and will not be described in detail here.

[0041] Since the vent 6 is located inside the liquid storage ring 1 and is relatively small, under the action of centrifugal force, the cutting fluid inside the liquid storage chamber 4 is located near the outer side of the liquid storage chamber 4, so the vent 6 will not cause leakage of cutting fluid.

[0042] In this embodiment, the dimensions of the liquid inlet 5 and the exhaust port 6 can be set according to actual needs, and will not be described in detail here.

[0043] The outer bottom portion of the liquid storage ring 1 is provided with multiple nozzles 8, the number of nozzles 8 corresponding to the number of blades 3, with each nozzle 8 corresponding to one blade 3. Figure 1 In the example, only one nozzle 8 is shown.

[0044] One end of the nozzle 8 is connected to the liquid storage chamber 4, and the other end is positioned towards the front cutting face of the blade 3, that is, the nozzle 8 extends to the vicinity of the front cutting face of the blade 3.

[0045] The liquid storage ring 1 rotates at high speed with the cutter head 11 and the tool holder 12. Under the action of centrifugal force, the cutting fluid inside the liquid storage chamber 4 can be sprayed out from the nozzle 8.

[0046] Multiple heat-conducting metal wires are provided between the nozzle 8 and the front cutting face of the blade 3. Preferably, the heat-conducting metal wires are copper wires 2.

[0047] Specifically, such as Figure 5 As shown, the area of ​​the blade 3 near the cutting edge has multiple uniformly sized insertion holes 9. Preferably, the insertion holes 9 are processed by laser processing.

[0048] Preferably, three sockets 9 are provided, and correspondingly, three copper wires are provided.

[0049] One end of the copper wire 2 is inserted and fixed to the front blade of the blade 3 through the insertion hole 9. After passing through the nozzle 8, the copper wire 2 extends into the liquid storage cavity 4, and the part extending into the liquid storage cavity 4 is distributed along a planar spiral line. The planar spiral line part of the copper wire 2 extending into the liquid storage cavity 4 is placed on the bottom cavity surface of the liquid storage cavity 4. That is, for the same copper wire 2, the end of the part distributed along the planar spiral line is led out along the nozzle 8 and inserted into the insertion hole 9.

[0050] During the operation of the milling cutter assembly in this embodiment, the cutter holder 12, cutter head 11, and liquid storage ring 1 rotate at high speed. The cutting edge of the rake face of the insert 3 mills the workpiece. During the high-speed rotation of the liquid storage ring 1, the cutting fluid in its internal liquid storage chamber 4 is sprayed towards the rake face of the insert 3 under the action of centrifugal force. The copper wire 2 between the nozzle 8 and the rake face of the insert 3 plays a guiding role for the cutting fluid, so that the cutting fluid can better enter the cutting area of ​​the insert 3 and enhance the cooling effect of the cutting fluid.

[0051] Because the heat-conducting metal wire is made of copper wire 2, which has better thermal conductivity than the cutting tool material, the heat generated during the cutting process can be quickly dissipated even when the cutting fluid is insufficient, thereby rapidly reducing the temperature of the cutting area of ​​the cutting tool, reducing tool wear, and improving the surface quality of the machined part.

[0052] It should be noted that when the reservoir ring 1 is filled with cutting fluid and the milling cutter assembly has not yet started machining, some cutting fluid will leak because the nozzle 8 is connected to the reservoir chamber 4. However, since the reservoir chamber is divided into multiple isolation chambers, and only some isolation chambers are connected to the nozzle 8, the leakage is very small and has little impact on machining.

[0053] Example 2

[0054] This embodiment provides a milling processing device, which is equipped with the milling cutter assembly described in Embodiment 1. The cutter holder is connected to the power system of the milling processing device. The remaining structure of the milling processing device can adopt the existing technology and will not be described in detail here.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A milling cutter assembly, comprising a cutter holder, a cutter disc fixed to the cutter holder, and cutting blades disposed on the cutter disc, characterized in that, A liquid reservoir ring is fixed on the outer periphery of the cutter head. The liquid reservoir ring has a liquid reservoir cavity to contain cutting fluid. A nozzle is connected to the outer part of the liquid reservoir ring. One end of the nozzle is connected to the liquid reservoir cavity, and the other end is set towards the cutting face of the cutting tool. Multiple heat-conducting metal wires are provided between the nozzle and the cutting face of the cutting tool to guide the cutting fluid to the cutting area of ​​the cutting face of the cutting tool. The liquid storage chamber is provided with multiple perforated baffles at equal intervals along the circumference to divide the internal space of the liquid storage chamber into multiple interconnected isolation chambers, and the through holes on adjacent perforated baffles are staggered. The blade's front face is provided with multiple insertion holes. One end of the heat-conducting metal wire is inserted and connected to the blade's front face through the insertion holes, and the other end passes through the nozzle and extends into the liquid storage chamber. The portion extending into the liquid storage chamber is distributed along a planar spiral line. The heat-conducting metal wire is made of copper wire.

2. A milling cutter assembly as described in claim 1, characterized in that, The liquid storage ring is provided with a liquid inlet, which is connected to the liquid storage chamber inside the liquid storage ring.

3. A milling cutter assembly as described in claim 2, characterized in that, The liquid inlet is located on the inner side of the liquid storage ring.

4. A milling cutter assembly as described in claim 1, characterized in that, The liquid storage ring is provided with an exhaust port, which is connected to the liquid storage chamber inside the liquid storage ring.

5. A milling cutter assembly as described in claim 4, characterized in that, The vent is located on the inner side of the liquid storage ring.

6. A milling cutter assembly as described in claim 1, characterized in that, The inner ring of the liquid storage ring is provided with multiple limiting blocks. Correspondingly, the outer periphery of the cutter head is provided with multiple limiting grooves that match the limiting blocks. The limiting blocks are embedded in the limiting grooves to fix the liquid storage ring and the cutter head.

7. A milling apparatus, characterized in that, The milling cutter assembly as described in any one of claims 1-6 is provided.

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