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CN-122007966-A - Cooling device for thermal field assisted machining milling cutter

CN122007966ACN 122007966 ACN122007966 ACN 122007966ACN-122007966-A

Abstract

The invention relates to the milling field and discloses a thermal field assisted milling cutter cooling device which comprises a milling cutter and a guide part movably connected with the milling cutter, wherein a channel is formed in the inner wall of the milling cutter, an accommodating cavity is formed in the inner wall of the guide part, when the milling cutter is connected with the guide part, the channel is communicated with the accommodating cavity, the guide part is connected with a low-temperature gas tank body through a conveying pipe, when the thermal field assisted milling cutter cooling device works, low-temperature carbon dioxide gas enters the accommodating cavity through the conveying pipe and then enters the channel in the inner wall of the milling cutter, so that the inner wall of the milling cutter extends to an integral cutter for cooling, the temperature of the milling cutter is obviously reduced from the inside, the main thermal mechanism causing the failure of the cutter is fundamentally restrained, and the higher cutting speed and the feeding rate are allowed to be used without worrying about the rapid failure of the cutter due to overheating. The metal removal rate is obviously improved, the processing time is shortened, and the production efficiency is improved.

Inventors

  • XU DONGDONG
  • LI JINYAO
  • XU GUILIN

Assignees

  • 同济大学
  • 北京航空航天大学

Dates

Publication Date
20260512
Application Date
20260203

Claims (10)

  1. 1. A thermal field assisted milling cutter cooling device is characterized by comprising, A milling cutter (5) and a guide (3) movably connected with the milling cutter (5); The inner wall of the milling cutter (5) is provided with a channel (51), the inner wall of the guide piece (3) is provided with a containing cavity, when the milling cutter (5) is connected with the guide piece (3), the channel (51) is communicated with the containing cavity, and the guide piece (3) is used for being connected with the gas tank (6) through a conveying pipe (9); During operation, low-temperature gas enters the accommodating cavity through the conveying pipe (9) and then enters the channel (51) of the inner wall of the milling cutter (5), so that the low-temperature gas is cooled by extending from the inner wall of the milling cutter (5) to the integral cutter.
  2. 2. The thermal field assisted milling cutter cooling device according to claim 1, wherein the guide (3) comprises a connection block (31), a first connection hole (32) and a second connection through hole (33) provided on the connection block (31); The accommodating cavity comprises a straight cavity (311) arranged between the first connecting hole (32) and the second connecting through hole (33) and a first air guide cavity (331) arranged in the connecting block (31); The straight cavity (311) is communicated with the first air guide cavity (331), and the first connecting hole (32) is used for being connected with the conveying pipe (9).
  3. 3. A thermal field assisted milling cutter cooling device according to claim 2, wherein the first air guiding cavity (331) is provided with at least one air outlet through hole (34), the air outlet through hole (34) being in communication with the second connecting through hole (33).
  4. 4. The cooling device for the thermal field assisted milling cutter according to claim 3, wherein the second connecting through hole (33) is inserted with a cutter handle (1), and two ends of the cutter handle (1) extending out of the second connecting through hole are respectively a first end and a second end.
  5. 5. A thermal field assisted milling cutter cooling device according to claim 4, wherein the inner wall of the port of the second end is provided with a collet (10), the port of the second end being adapted to fix the collet (10) to the inner wall of the second end by screwing with a nut (13); the collet (10) is used for clamping the end of the milling cutter (5).
  6. 6. The cooling device for the thermal field assisted milling cutter is characterized in that an air guide cavity (11) is formed in the upper inner wall of the cutter handle (1), at least one group of air guide through holes (12) are formed in the cutter handle (1), and the air guide cavity (11) is communicated with the air guide through holes (12).
  7. 7. The cooling device for the thermal field assisted milling cutter according to claim 6, wherein when the cutter handle (1) is inserted into the second connecting through hole (33), a space between the periphery of the outer wall of the cutter handle (1) and the periphery of the inner wall of the second connecting through hole (33) is a second air guide cavity (35), and the air guide through hole (12) is located in the second air guide cavity (35).
  8. 8. The cooling device for the milling cutter (5) with the thermal field assisted machining according to claim 7, wherein the channels (51) on the inner wall of the milling cutter (5) comprise a first channel and an air outlet channel, wherein the first channel is provided with one group, the air outlet channels are provided with at least two groups, and the air inlet end of the first channel is arranged at the top end of the milling cutter; the air inlet ends of the air outlet channels are connected with the tail end of the first channel, and the air outlet ends of the air outlet channels are uniformly distributed on the outer wall of the tail end of the milling cutter (5) around the central shaft of the milling cutter (5).
  9. 9. The cooling device for the milling cutter assisted by the thermal field is characterized in that at least four groups of channels (51) are formed in the inner wall of the milling cutter (5), air inlet ends of the channels (51) are arranged on the end face of the inner wall of the milling cutter (5), and air outlet ends of the channels (51) are uniformly distributed on the outer wall of the milling cutter (5) around the central shaft of the milling cutter (5).
  10. 10. The cooling device for the thermal field assisted milling cutter is characterized in that the outer wall of the first end of the cutter handle (1) is sleeved with a large sleeve (2), and the outer wall of the second end of the cutter handle (1) is sleeved with a small sleeve (4).

Description

Cooling device for thermal field assisted machining milling cutter Technical Field The invention relates to the milling field, in particular to a milling cutter cooling device for thermal field auxiliary processing. Background Milling is the core process of metal cutting. The process realizes the accurate removal of workpiece materials through the relative movement of the rotary multi-edge tool and the workpiece, and can finish the processing of various complex geometric features such as planes, curved surfaces, threads, gears and the like. The heat assisted processing represented by laser assistance can obviously reduce the cutting force during processing and improve the processing surface quality, but in the processing process, a large amount of heat can be generated by plastic deformation, frictional heating and laser irradiation of materials, and the propagation path of the heat in a process system is complex and dynamically changed, so that local high-temperature hot spots can be formed due to factors such as heat conductivity coefficient and the like. The process system generates an uneven temperature field after being heated, complicated thermal deformation is caused, adverse effects can be generated on machining precision, cutter performance, surface integrity and the like, particularly the cutter abrasion is accelerated due to the high-temperature environment assisted by the thermal field, the cutter cost is improved, the production efficiency is reduced, and the application of the related technology in the actual industry is limited. Disclosure of Invention Therefore, the technical problem to be solved by the invention is that an uneven temperature field is generated after a process system is heated, complex thermal deformation is caused, adverse effects can be generated on machining precision, cutter performance, surface integrity and the like, particularly the cutter abrasion is accelerated due to a high-temperature environment assisted by the thermal field, the cutter cost is improved, the production efficiency is reduced, and the application of the related technology in the practical industry is limited. The technical problem is solved by the technical scheme that the cooling device for the milling cutter for thermal field assisted machining comprises a milling cutter and a guide part movably connected with the milling cutter, wherein a channel is formed in the inner wall of the milling cutter, a containing cavity is formed in the inner wall of the guide part, when the milling cutter is connected with the guide part, the channel is communicated with the containing cavity, the guide part is used for being connected with a low-temperature gas tank through a conveying pipe, and when the cooling device is in operation, low-temperature gas enters the containing cavity through the conveying pipe and then enters the channel in the inner wall of the milling cutter, so that the milling cutter is extended to the whole cutter from the inner wall of the milling cutter for cooling. In a preferable mode of the thermal field assisted milling cutter cooling device, the guide piece comprises a connecting block, a first connecting hole and a second connecting through hole, wherein the first connecting hole and the second connecting through hole are formed in the connecting block, the accommodating cavity comprises a straight cavity body and a first air guide cavity body, the straight cavity body is arranged between the first connecting hole and the second connecting through hole, the first air guide cavity body is arranged in the connecting block, the straight cavity body is communicated with the first air guide cavity body, and the first connecting hole is used for being connected with the conveying pipe. In one preferable mode of the thermal field assisted milling cutter cooling device, the first air guide cavity is provided with at least one air outlet through hole, and the air outlet through hole is communicated with the second connecting through hole. In one preferable mode of the thermal field auxiliary milling cutter cooling device, the second connecting through hole is inserted with a cutter handle, and two ends of the cutter handle extending out of the second connecting hole are respectively a first end and a second end. In a preferred mode of the thermal field assisted milling cutter cooling device, a collet is arranged on the inner wall of the port of the second end, the collet is fixed on the inner wall of the second end through threaded connection with a nut by the port of the second end, and the collet is used for clamping the end part of the milling cutter. In one preferable mode of the thermal field auxiliary milling cutter cooling device, the upper inner wall of the cutter handle is provided with an air guide cavity, the cutter handle is provided with at least one group of air guide through holes, and the air guide cavity is communicated with the air guide through holes. In one preferable mode