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CN-122007908-A - Device and method for processing fluid cooling plate inner flow passage

CN122007908ACN 122007908 ACN122007908 ACN 122007908ACN-122007908-A

Abstract

The invention relates to a device and a method for processing a flow passage in a liquid cooling plate, and belongs to the technical field of liquid cooling plates. The multifunctional spindle comprises an upper part of a functional part connected with a spindle through a bolt, wherein an annular groove is formed in the middle of the functional part, a longitudinal welding part is formed at the bottom of the annular groove, two transverse faces are arranged at the upper end and the lower end of the welding part and are annular groove side faces, an upper shaft shoulder and a lower shaft shoulder are respectively and correspondingly arranged at the upper end and the lower end of the welding part, and an end milling part is arranged at the lower part of the lower shaft shoulder. The invention has excellent flow channel quality, the cooperation of vertical tooth cutting and spiral pushing ensures that the inner wall of the flow channel is smooth, the cover surface is compact, no welding defects such as air holes, cracks and the like exist, meanwhile, the continuous flushing of the cooling liquid avoids chip residues, the surface roughness of the flow channel is low, and the heat dissipation performance of the liquid cooling plate is obviously improved.

Inventors

  • HUANG YONGXIAN
  • GUO RUITAO
  • MENG XIANGCHEN
  • XIE YUMING
  • SHAN CHENG

Assignees

  • 哈尔滨工业大学

Dates

Publication Date
20260512
Application Date
20260316

Claims (10)

  1. 1. A liquid cooling plate internal flow path processing device is characterized by comprising: the upper part of the functional part (3) is connected with the mandrel (1), and the middle part of the functional part (3) is provided with a welding part (36); An upper shaft shoulder (37) and a lower shaft shoulder (38) are arranged at the upper end and the lower end of the welding part (36); An end milling part (35) is arranged at the lower part of the lower shaft shoulder (38).
  2. 2. A liquid cooling plate inner flow path processing apparatus according to claim 1, wherein the diameter of the end milling part (35) is larger than the diameter of the welding part (36).
  3. 3. The fluid cooling plate inner flow path machining device according to claim 1, wherein the upper portion of the mandrel (1) is a clamping portion (11), a mandrel liquid inlet cavity (13) is formed in the lower portion of the mandrel (1), a mandrel liquid inlet (12) communicated with the mandrel liquid inlet cavity (13) is formed in the side face of the mandrel (1), and a liquid outlet at the lower end of the mandrel liquid inlet cavity (13) of the mandrel (1) is connected with the functional portion (3).
  4. 4. The fluid cooling plate inner flow path machining device according to claim 3, wherein the upper end of the functional part (3) is provided with a liquid inlet cavity (32), the axis of the functional part (3) is provided with a stirring needle liquid inlet cavity (33), a water outlet (34) is arranged between the lower shaft shoulder (38) and the end milling part (35), the liquid inlet cavity (32) is correspondingly arranged with the mandrel liquid inlet cavity (13), and the liquid inlet cavity (32) is communicated with the water outlet (34) through the stirring needle liquid inlet cavity (33).
  5. 5. The fluid cooling plate inner flow passage machining device according to claim 4, wherein a plurality of mandrel tail end threaded holes (17) which are uniformly distributed in the circumferential direction are formed in the lower end face of the mandrel (1), a plurality of step-shaped through holes (31) which are uniformly distributed in the circumferential direction are formed in the functional portion (3), a sealing ring is arranged between the functional portion (3) and a mandrel end sealing groove (16) of the mandrel (1), the step-shaped through holes (31) are correspondingly arranged with the mandrel tail end threaded holes (17), bolts penetrate through the step-shaped through holes (31) and then are in threaded connection with the mandrel tail end threaded holes (17), and threaded nuts are pressed on steps of the step-shaped through holes.
  6. 6. The processing device for the fluid cooling plate inner flow passage according to claim 4, wherein the outer side of the mandrel (1) is sleeved with a static shaft sleeve (2), the static shaft sleeve (2) is provided with an annular liquid storage cavity (25) communicated with the mandrel liquid inlet (12), and the side surface of the annular liquid storage cavity (25) is provided with a shaft sleeve liquid inlet (26).
  7. 7. The fluid cooling plate inner flow path processing device according to claim 6, wherein an upper mounting cavity (21) and a lower mounting cavity (22) are respectively arranged on the upper side and the lower side of the static shaft sleeve (2), an upper positioning groove (211) of the upper mounting cavity (21) is connected with an outer ring of an upper bearing (212), a lower positioning groove (221) of the lower mounting cavity (22) is connected with an outer ring of a lower bearing (222), a first sealing ring (23) and a second sealing ring (24) are arranged on the upper side and the lower side of the annular fluid storage cavity (25), and an inner ring of the upper bearing (212) and an inner ring of the lower bearing (222) are connected with the mandrel (1); The upper side of the mandrel (1) is provided with a blocking edge, the lower end of the mandrel (1) is provided with a mandrel end external thread (14), the radial lock nut (15) is matched with the mandrel end external thread (14), the radial lock nut (15) is tightly propped against the inner ring of the lower bearing (222), and the blocking edge is tightly pressed against the inner ring of the upper bearing (212).
  8. 8. A liquid cooling plate inner flow path processing apparatus as set forth in claim 7, wherein the end milling parts (35) are of a uniformly distributed vertical tooth structure, and the upper shaft shoulder (37) is of a disk-shaped structure with a concave angle.
  9. 9. A method for processing a liquid cooling plate inner flow passage is characterized by adopting the liquid cooling plate inner flow passage processing device disclosed in any one of claims 1-8, and comprises the following steps: step one, matching a clamping part (11) of a mandrel with a main shaft of a friction stir welding machine; Step two, determining the diameter and the height of the end cutting part, the height, the advancing speed, the rotating speed and the end position of the stirring pin according to the flow channel design requirement; Starting equipment to enable the mandrel (1) to drive the functional part (3) to rotate at a high speed and to travel at a constant speed along a preset track; In the advancing process, friction is carried out between the welding part of the stirring pin and the material to enable the cover material to achieve thermal plasticization, the stirring pin rotates to enable the cover material to be fully fused, a compact runner cover surface is formed behind the stirring pin, and an upper shaft shoulder (37) synchronously compacts the surface material to ensure that the cover surface has no pore; Fifthly, cutting materials, flushing cooling liquid from a side blade water outlet, flushing away cuttings, cooling a tool and a workpiece, and reducing welding heat input; And step six, stopping advancing and rotating after reaching the end position, and closing the supply of the cooling liquid to finish the preparation of the integrated inner runner.
  10. 10. The method for processing the fluid cooling plate inner flow passage according to claim 9, further comprising the steps of converging or intersecting the plurality of flow passages, and comprising the steps of: Step 1, firstly, processing a main line runner, and after the device moves to a terminal point along a preset track, lifting the device to be separated from a substrate and moving to a branch line runner starting point; Step 2, the device is pricked downwards, a branch line runner is processed according to set parameters and tracks, when the branch line runner advances to a confluence point or an intersection point, as the diameter of a cutting part is larger than the diameter of a stirring pin, when the branch line runner is converged, the runner is circulated firstly or a runner below a cover surface is communicated firstly, a cover surface material is supported by a lower shaft shoulder, and welding of the confluence point is completed under the action of the stirring pin; step 3, the device moves away from the junction along the track, moves to the end point of the branch flow channel, lifts off the substrate and completes processing; or step 1, when a plurality of flow channels are converged or cross-processed, the device processes the main flow channel according to preset parameters and tracks until the main flow channel reaches a terminal point; Step 2, after the processing tool moves to the end point along a preset track, reversely moves to a first junction point, and the shaft shoulder supports the cover material when moving to prevent the cover material from collapsing, and the cover is welded again under the action of the stirring pin, so that the compactness is kept all the time; step 3, after the first branch runner is moved to the junction, the processing tool moves along the follow-up track of the first branch runner, and the processing of the first branch runner is completed; and 4, finishing the subsequent branch flow passage according to the processing mode, wherein the method only has one downward binding point and upward lifting point, and the processing quality is ensured.

Description

Device and method for processing fluid cooling plate inner flow passage Technical Field The invention relates to an internal runner processing device and method, and belongs to the technical field of water cooling plates. Background Heat dissipation performance is one of the core factors limiting the improvement of the performance of various key equipment. Compared with the traditional air cooling heat dissipation technology, the water cooling heat dissipation can effectively adapt to the light weight design requirement of key equipment by virtue of higher heat dissipation efficiency, so that the water cooling plate is used as a core heat dissipation component and is widely applied to the field of various high-end equipment. The cooling flow channel of the traditional liquid cooling plate is prepared by commonly adopting a process mode of prefabricating a channel and welding cover plates, the process flow is complicated, the processing efficiency is low, the welding deformation problem inevitably exists, aiming at the cover plate welding procedure, air hole defects are easily generated in the traditional fusion welding process to influence the sealing performance of the flow channel and the reliability of products, if the cover plates are welded by friction stir welding, cover plate mounting steps are required to be reserved at two sides of the flow channel, the cover plates are easily deformed and run in the welding process to influence the welding quality, and the subsequent correction procedure and the production cost are increased. The friction stir tunnel forming technology is a runner processing technology based on friction stir welding derivation, and the principle is that after a stirring needle is inserted into a substrate, a screw thread is utilized to rotate and drive a material to flow towards a shaft shoulder direction, and the material is deposited in a gap reserved between the shaft shoulder and the surface of a workpiece, so that a continuous single tunnel, namely a runner, is formed inside a metal material. The technology can be applied to nonferrous metal materials such as aluminum plates and copper plates, for example, the disclosure number is CN121423799A, the invention creates a friction stir tunnel forming device and a method for enhancing the bearing performance, the technical scheme of the device discloses upward overflow of materials depending on tunnel generation, the emphasis is on single-pass adjustable tunnel height, and the defect is that the device is greatly influenced by technological parameters and tool morphology and has a plurality of limitations. The prior art therefore has the following problems: 1. the design requirements on the processing tool are harsh, and the adapted technological parameters need to be repeatedly explored, so that the processing difficulty is high; 2. the formed tunnel is limited in size and cannot meet the processing requirement of a large-size runner; 3. The roughness of the inner surface of the runner is higher, so that the smoothness of the coolant flow is affected, and the heat dissipation efficiency is further reduced; 4. only a single flow channel can be processed, and the preparation of the flow channels with complex structures such as the cross flow channels, the confluent flow channels and the like can not be realized, so that the adaptability is poor. Therefore, it is needed to provide a device and a method for processing the fluid channel in the liquid cooling plate, so as to solve the above-mentioned technical problems. Disclosure of Invention In order to solve the above problems, a liquid-cooled plate fluid passage processing apparatus and method is provided, a brief overview of which is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The technical scheme of the invention is as follows: a liquid cooling plate inner flow path processing device comprises a mandrel and a functional part; the upper part of the functional part is connected with the mandrel through a bolt, the middle part of the functional part is provided with an annular groove, and the bottom of the annular groove forms a longitudinal welding part (a welding part stirring pin); The upper end and the lower end of the welding part are provided with two transverse surfaces which are annular groove side surfaces, and the upper shaft shoulder and the lower shaft shoulder are respectively and correspondingly arranged on the upper end and the lower end of the welding part; the lower part of the lower shaft shoulder is provided with an end milling part. Preferably, the diameters of the end milling part, the upper shaft shoulder and the lower shaft shoulder are larger than the diameter of the welding part. Preferably, the upper