JP2014065108A - Method of producing heat sink and heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of producing a heat sink enabling easy production of a heat sink having high heat transfer efficiency.SOLUTION: A method of producing a heat sink is for producing one with fins formed around a channel part in an integrated form and includes a preparation step of preparing a to-be-cut block 10 provided with a through hole 11 penetrating from one end surface to the other end surface opposite to the one end surface and serving as a channel part and a cutting step of cutting the to-be-cut block 10 by moving relatively a multiple cutter 20 equipped with a plurality of disk cutters 22 laminated with a clearance between them and the to-be-cut block 10 so as to form fins with uncut areas left around the through hole 11.

Description

  The present invention relates to a radiator manufacturing method and a radiator.

  For example, Patent Document 1 describes a radiator including a flow path portion (heat transfer tube) and a plurality of fins arranged in parallel in the flow path portion. The fin is formed with a mounting seat that opens upward and has a U-shape when viewed from the front. The flow path portion is fitted to the mounting seat of the fin and is fixed to the fin by brazing.

JP 2001-165588 A

  Conventional heat radiators are fixed by brazing the two members of the fin and the flow path part, so that a wax is interposed between the fin and the flow path part or a fine gap is generated, resulting in poor heat transfer efficiency. There was a problem. Further, since the conventional radiator is configured by fitting the flow path portion to the fin, there is a problem that the work of assembling the flow path portion and the fin becomes complicated.

  From such a viewpoint, it is an object of the present invention to provide a method for manufacturing a radiator that can easily manufacture a radiator having high heat transfer efficiency. Moreover, this invention makes it a subject to provide a heat radiator with high heat-transfer efficiency.

  In order to solve such a problem, the present invention is a method of manufacturing a radiator in which fins are integrally formed around a flow path portion, and penetrates from one end surface to the other end surface facing the one end surface, A preparation step of preparing a block to be cut provided with a through-hole serving as the flow path portion, a multi-cutter provided with a plurality of disc cutters stacked with a gap therebetween, and the block to be cut are relatively moved. Cutting the block to be cut, and forming the fin while leaving an uncut region around the through hole.

  According to this manufacturing method, since the flow path portion and the fin are integrally formed from one block to be cut, the heat transfer efficiency is high. Moreover, since it is only necessary to cut one block to be cut with a multi-cutter, an assembling work is unnecessary, and a radiator can be easily manufactured.

In the cutting step, the center axis of the through hole and the rotation axis of the multi-cutter are arranged in parallel, and the block to be cut rotates while the disk cutter and the block to be cut are in contact with each other. It is preferable to make it.
In the cutting step, the center axis of the through hole and the rotation axis of the multi-cutter are arranged in parallel, and the disk cutter and the block to be cut are in contact with each other while the disk cutter and the block to be cut are in contact with each other. It is preferable to revolve the multi cutter.

  According to this manufacturing method, since any one member or apparatus should just be moved among a multi cutter and a to-be-cut block, it can manufacture more easily.

  In the cutting step, the block to be cut is preferably rotated one or more times. In the cutting step, it is preferable to revolve the multi-cutter more than once. According to this manufacturing method, since fins can be formed on the entire circumference of the flow path part, the area of the fins can be increased in a balanced manner.

Further, the present invention is arranged such that, in the cutting step, the central axis of the through hole and the rotation axis of the multi-cutter are arranged in parallel, and the disk cutter and the block to be cut are brought into contact with each other in a straight line shape. Relative movement is preferable.
Further, the present invention is arranged such that, in the cutting step, the central axis of the through hole and the rotation axis of the multi-cutter are perpendicular to each other, and the disk cutter and the block to be cut are brought into contact with each other in a straight line shape. It is preferable to move the phase.

  According to this manufacturing method, since it is only necessary to relatively move the multi-cutter and the block to be cut in a straight line, it can be easily manufactured.

  In the cutting step, it is preferable to form a plurality of fins on both sides of the through hole. According to this manufacturing method, the total area of the fins can be increased, and the heat transfer efficiency can be increased.

  And a connecting pipe forming step of forming a connecting pipe communicating with the through hole by cutting so that an uncut region is formed around the through hole at at least one of both ends of the block to be cut. Is preferred. According to this manufacturing method, the connecting pipe communicating with the through hole can be easily manufactured.

  The block to be cut is preferably an extruded shape made of aluminum or an aluminum alloy. By using aluminum or an aluminum alloy, the formability in the cutting process can be improved. Moreover, since it is an extrusion shape material, a member can be procured easily.

  Further, the present invention is a method of manufacturing a radiator in which fins are integrally formed around a flow path portion, and includes a preparation step of preparing a block to be cut and a plurality of disk cutters stacked with a gap. Cutting the block to be cut by relatively moving the multi-cutter and the block to be cut to form a solid part and the fin around the solid part; and A flow path part forming step of forming a through hole in the solid part formed inside the cutting block along a central axis direction to form the flow path part.

  According to this manufacturing method, since the flow path portion and the fin are integrally formed from one block to be cut, the heat transfer efficiency is high. Moreover, since it is only necessary to cut one block to be cut with a multi-cutter and to form a through hole in the solid part, a radiator can be easily manufactured.

  In addition, a flow path portion through which a fluid flows and a plurality of fins integrally formed with the flow path portion around the flow path portion are provided. Moreover, it is preferable to have a connecting pipe integrally formed in the flow path portion.

  According to such a configuration, the heat transfer efficiency is high because the flow path portion and the fin are integrally formed. Further, since no assembly work is required as in the prior art, it can be manufactured easily.

  According to the radiator manufacturing method of the present invention, a radiator having high heat transfer efficiency can be easily manufactured. Moreover, according to the heat radiator which concerns on this invention, heat-transfer efficiency can be improved.

It is a perspective view which shows the heat radiator which concerns on 1st embodiment of this invention. It is II sectional drawing of FIG. It is a perspective view which shows the preparatory process of the manufacturing method of the heat radiator which concerns on 1st embodiment. It is a perspective view which shows the cutting process of the manufacturing method of the heat radiator which concerns on 1st embodiment. It is a top view which shows the cutting process of the manufacturing method of the heat radiator which concerns on 1st embodiment. It is a perspective view which shows the case where a nozzle | cap | die member is attached to the heat radiator which concerns on 1st embodiment. It is a perspective view which shows the heat radiator which concerns on 2nd embodiment of this invention. It is a perspective view which shows the preparatory process of the manufacturing method of the heat radiator which concerns on 2nd embodiment. It is a perspective view which shows the cutting process of the manufacturing method of the heat radiator which concerns on 2nd embodiment. It is a perspective view which shows the connection pipe formation process of the manufacturing method of the heat radiator which concerns on 2nd embodiment, Comprising: (a) shows before cutting, (b) shows after cutting. It is a top view which shows the cutting process of the manufacturing method of the heat radiator which concerns on 3rd embodiment of this invention. It is a perspective view which shows the heat radiator which concerns on 4th embodiment of this invention. It is a front view which shows the cutting process of the manufacturing method of the heat radiator which concerns on 4th embodiment, Comprising: (a) is before cutting, (b) shows during cutting. It is a perspective view which shows the heat radiator which concerns on 5th embodiment of this invention. It is a side view which shows the manufacturing method of the heat radiator which concerns on 5th embodiment. It is a figure which shows the manufacturing method of the heat radiator which concerns on 6th embodiment, Comprising: (a) is a perspective view after a cutting process, (b) is II-II sectional drawing of (a).

[First embodiment]
Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the radiator 1 according to this embodiment includes a flow path portion 2 through which a fluid flows and a plurality of fins 3 integrally formed around the flow path portion 2. The radiator 1 is an instrument that releases heat of a fluid flowing inside the flow path portion 2 to the outside, and is used for a heat exchanger or the like. The material of the radiator 1 is preferably a metal that can be cut and has high heat transfer efficiency. In this embodiment, the radiator 1 is made of an aluminum alloy.

  As shown in FIG. 2, the flow path portion 2 is a cylindrical tube and passes through the center of the plurality of fins 3. The thickness of the flow path portion 2 is constant. The fin 3 is a plate-like member having a rectangular shape when viewed from the front, and is integrally formed with the flow path portion 2. The plurality of fins 3 are arranged in parallel at equal intervals with a gap in the direction of the central axis C of the flow path portion 2. The plurality of fins 3 have the same shape. When the radiator 1 is viewed from the front, the center of the fin 3 (the intersection of the diagonal lines) coincides with the central axis C of the flow path portion 2. In addition, although the flow-path part 2 exhibits cross-sectional circle shape in this embodiment, other shapes, such as a cross-sectional polygon, may be sufficient. In addition, the fin 3 has a rectangular shape in front view in the present embodiment, but may have other shapes such as a polygonal shape, a circular shape, and an elliptical shape in front view.

  Next, the manufacturing method of the heat radiator which concerns on this embodiment is demonstrated. In the heat radiator manufacturing method according to the present embodiment, a preparation process and a cutting process are performed.

  As shown in FIG. 3, the preparation step is a step of preparing the cutting block 10 and fixing the cutting block 10 to a jig. The block 10 to be cut is a member that is a base of the radiator 1. A through hole 11 is formed in the block 10 to be cut. The block 10 to be cut is an aluminum alloy extruded shape in which the extending direction of the through hole 11 is an extrusion direction. The block 10 to be cut has a substantially rectangular parallelepiped shape. The through hole 11 has a cylindrical shape and penetrates from the one end surface 12 to the other end surface 13 facing the one end surface 12.

  In addition, although the extruded block was used for the block 10 to be cut in this embodiment, it may be formed by other forming methods such as forging and die casting. The through-hole 11 may be formed by cutting a raw material using a drill or the like.

  As shown in FIG. 4, the jig J has a columnar shape and abuts against one end surface 12 and the other end surface 13 of the block 10 to be cut. A protrusion (not shown) having an outer diameter substantially equal to that of the through hole 11 is provided at the tip of the jig J. When the block 10 to be cut is fixed with the pair of jigs J and J, the projection is fitted into the through hole 11 and the block 10 to be cut is not rotated relative to the jigs J and J. Then, the jigs J and J are pressed and held in the directions approaching each other. The jigs J, J are translated in the direction approaching or separating from the multi-cutter 20 while holding the block 10 to be cut, and are capable of rotating about the central axis C.

  The cutting process is a process of cutting the block 10 to be cut using the multi-cutter 20 to form the flow path portion 2 and the fins 3. In the cutting process, an entering process, a rotating process, and a retracting process are performed.

  The multi-cutter 20 includes a rotation shaft 21 and a plurality of disk cutters 22 attached perpendicular to the rotation shaft 21. The disk cutter 22 is an instrument that cuts an object by rotating at high speed around the rotation shaft 21. Although not specifically shown, a plurality of blades are provided on the outer edge of the disk cutter 22. The disk cutters 22 are stacked with a gap. The gap between the disk cutters 22 and 22 is equal to the thickness of the fin 3. The thickness of the disk cutter 22 is equivalent to the gap between the adjacent fins 3 and 3. What is necessary is just to set the thickness of the fin 3 and the clearance gap between the adjacent fins 3 and 3 suitably according to the use of the heat radiator 1. FIG.

  In the entering step, first, the block 10 to be cut and the multi-cutter 20 are arranged so that the rotation shaft 21 of the multi-cutter 20 and the central axis C of the through hole 11 are parallel to each other. Then, the multi-cutter 20 is driven to rotate the disk cutter 22 in the circumferential direction. The multi-cutter 20 is continuously rotated until the retracting process is completed.

  Next, in the entering step, as shown in FIG. 5, the cutting target block 10 is caused to enter the multi-cutter 20 until the cutting depth d is set in advance in a state where the multi-cutter 20 is fixed so as not to move. . That is, the block 10 to be cut is brought close to the rotary shaft 21 while maintaining the parallel state of the rotary shaft 21 and the central axis C. In the present embodiment, since the cutting depth on the diagonal line is the largest among the blocks 10 to be cut, the straight line connecting the ridge line 14a facing the central axis C and the radius of the disk cutter 22 may be moved so as to overlap. preferable. The cutting depth d may be appropriately set within a range not reaching the through hole 11. The distance t between the disk cutter 22 and the through hole 11 is the thickness of the flow path portion 2.

  In the rotation process, the block 10 to be cut is centered while maintaining the distance between the center of the rotary shaft 21 and the center axis C so that the distance t between the hole wall of the through hole 11 and the outer edge of the multi-cutter 20 is constant. Rotate around axis C. In the present embodiment, the block 10 to be cut is rotated one or more times. When rotating the block 10 to be cut, the jigs J and J may be rotated around the central axis C. As a result, an “uncut region” is formed around the through hole 11, and this uncut region becomes the flow path portion 2.

  In the retracting process, the block 10 to be cut is separated from the multi-cutter 20. The heat radiator 1 shown in FIG. 1 is completed by the above process.

  The connecting pipe (the pipe connecting the external flow path and the flow path section 2) connected to the flow path section 2 of the radiator 1 can be welded, fitted, screwed, etc. to the end of the flow path section 2. Good. Further, for example, as shown in FIG. 6, a base member 30 may be attached. The base member 30 includes a flange 31, a connecting pipe 32, and an insertion pipe 33. The connecting pipe 32 is provided vertically on one side of the flange 31. The insertion tube 33 is provided vertically on the other side of the flange 31. The insertion tube 33 tapers toward the distal end and fits into the flow path portion 2.

  According to the radiator manufacturing method described above, the flow path portion 2 and the fins 3 are integrally formed from a single block 10 to be cut. There are no gaps or wax intervening. Thereby, the heat transfer efficiency of the heat radiator 1 can be improved. Further, since only one cutting block 10 needs to be cut with the multi-cutter 20, an assembling work is not required, and the radiator 1 can be easily manufactured.

  Further, in the cutting process, cutting is facilitated by rotating the block 10 to be cut. Further, the thickness of the fin 3 and the gap between the fins 3 and 3 can be easily set by appropriately setting the thickness of the disk cutter 22 of the multi-cutter 20 and the gap between the disk cutters 22 and 22.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. As shown in FIG. 7, the radiator 1A according to the second embodiment is different from the first embodiment in that the connecting pipe 4 is integrally formed with the radiator 1A.

  The heat radiator 1 </ b> A includes a flow path portion 2, a plurality of fins 3 integrally formed around the flow path portion 2, and connecting pipes 4 and 4 formed at both ends of the flow path portion 2. The flow path part 2 and the fin 3 are equivalent to 1st embodiment. The connecting pipe 4 is concentric with the flow path portion 2 and is formed to communicate with the flow path portion 2. The inner diameter and thickness of the connecting pipe 4 are the same as those of the flow path portion 2. The connecting pipe 4 extends perpendicular to the fin 3.

  The manufacturing method of the heat radiator which concerns on 2nd embodiment performs a preparatory process, a cutting process, and a connection pipe formation process. As shown in FIG. 8, the preparation step is a step of preparing the block 10 to be cut and fixing the block 10 to be cut to the jig J1. The block 10 to be cut has a rectangular parallelepiped shape, and a through hole 11 is formed. The through hole 11 penetrates from one end surface 12 to the other end surface 13.

  The jig J1 has a columnar shape and is fitted to one end side and the other end side of the block 10 to be cut. On the end face of the jig J1, a recess J1a having a shape equivalent to the end of the block 10 to be cut is formed. The end of the block 10 to be cut is fitted into the recess J1a. The depth of the recess J1a is the same as the length of the fitting allowance 14b formed at both ends of the block 10 to be cut. When the block 10 to be cut and the jigs J1 and J1 are fitted together, the exposed portion 14c is exposed at the center of the block 10 to be cut.

  By fitting the jigs J1 and J1 and the block 10 to be cut, rotation of the block 10 to be cut with respect to the jigs J1 and J1 is prevented. In addition, the jigs J1 and J1 are translated in the direction approaching or separating from the multi-cutter 20 while holding the block 10 to be cut, and are capable of rotating about the central axis C.

  As shown in FIG. 9, in the cutting process, the block 10 to be cut is held by the jigs J <b> 1 and J <b> 1, and the block 10 is cut by the multi-cutter 20 to form the flow path portions 2 and the fins 3. It is a process to do. As shown in FIG. 10A, when the cutting process is performed, the flow path portion 2 and the fin 3 are formed in the exposed portion 14c of the block 10 to be cut. Since the cutting process is the same as that of the first embodiment except that the jigs J1 and J1 are used, detailed description thereof is omitted.

  In the connecting pipe forming step, connecting pipes 4 and 4 (see FIG. 10B) are formed in the fitting margins 14b and 14b where the fins 3 are not formed.

  As shown in FIG. 10 (b), in the connecting pipe forming step, the distance t is left from the hole wall of the through hole 11, and the remaining portion of the one fitting margin 14b is removed by a cutting tool (not shown). Remove by cutting. The distance t between the cutting tool and the through hole 11 is the thickness of the connecting pipe 4. Thereby, the connecting pipe 4 perpendicular to the fin 3 is formed. Note that the outer diameter of the connecting pipe 4 and the outer diameter of the flow path portion 2 may be different or the same. Similarly, the other fitting allowance 14b is cut by a cutting tool to form the connecting pipe 4.

  The method for manufacturing a radiator according to the second embodiment described above can also provide substantially the same effect as the first embodiment. Further, since the connecting pipe 4 that connects the flow path portion 2 and the external flow path can be integrally formed with the flow path portion 2, the heat transfer efficiency can be further increased. Moreover, according to the manufacturing method of this embodiment, the connecting pipe 4 can be easily formed only by cutting the fitting margin 14b.

[Third embodiment]
Next, the manufacturing method of the heat radiator which concerns on 3rd embodiment of this invention is demonstrated. As shown in FIG. 11, the radiator manufacturing method according to the third embodiment is different from the first embodiment in that the multi-cutter 20 is revolved with respect to the block 10 to be cut. Here, it demonstrates centering on the part which is different from 1st embodiment, and abbreviate | omits description of the part which overlaps with 1st embodiment.

  In the cutting process according to the third embodiment, an approach process, a revolution process, and a retreat process are performed. In the entering step, the rotating multi-cutter 20 enters the block 10 to be cut. In order to allow the multi-cutter 20 to enter the block 10 to be cut, the block 10 to be cut and the multi-cutter 20 may be relatively translated and the distance between them may be reduced.

  When the multi-cutter 20 is entered to a predetermined depth, the process proceeds to the revolution process. In the revolution process, the multi-cutter 20 is revolved around the block 10 to be cut while maintaining the distance between the center of the rotating shaft 21 and the center axis C. In the present embodiment, the multi-cutter 20 is moved one or more times. When the revolution process is completed, the process proceeds to the evacuation process.

  In the retracting process, the block 10 to be cut and the multi-cutter 20 are relatively separated from each other.

  As described above, even when the multi-cutter 20 is moved around the block 10 to be cut as in the method of manufacturing a radiator according to the third embodiment, the radiator 1 can be easily manufactured.

[Fourth embodiment]
Next, a radiator manufacturing method according to a fourth embodiment of the present invention will be described. As shown in FIG. 12, the radiator 1 </ b> B according to the fourth embodiment includes a main body 41 and fins 43.

  The main body 41 has a substantially rectangular parallelepiped shape and has a through hole 42 inside. The main body 41 is solid except for the through holes 42. The through hole 42 penetrates from the one end surface 12 to the other end surface 13. The through hole 42 is a part through which fluid flows. The fins 43 are erected perpendicularly to the main body 41 and are disposed perpendicular to the central axis C. The plurality of fins 43 are arranged in parallel at equal intervals, and are formed on both sides of the main body 41. The height of the fin 43 is about 1/3 of the total height of the radiator 1B.

  In the radiator manufacturing method according to the fourth embodiment, a preparation process and a cutting process are performed. In the preparation step, as shown in FIG. 13A, the block 10 to be cut is prepared and the block 10 to be cut is fixed to the gantry K so as not to move.

  In the cutting process, the multi-cutter 20 is made to enter the block to be cut 10 to form the fins 43. Specifically, the central axis C of the through hole 42 and the rotary shaft 21 of the multi-cutter 20 are arranged in parallel, and the disk cutter 22 is inserted into one of the upper ridge lines 14a and 14a while maintaining this parallelism. . The disk cutter 22 may be inserted from above in the vertical direction of one ridge line 14a, or may be inserted obliquely as shown in FIG. When the disk cutter 22 is inserted to the cutting depth d, the multi-cutter 20 is relatively moved linearly toward the other ridge line 14a while maintaining the cutting depth d.

  When the multi-cutter 20 is moved to a position where the center of the rotation shaft 21 and the other ridge line 14a overlap each other on the vertical line, the multi-cutter 20 is detached from the block 10 to be cut. The multi-cutter 20 may be detached in any of the horizontal direction, the vertical direction, and the diagonally upward direction. The heat sink 1B is completed by turning over the block 10 to be cut and performing the same cutting process on the side surface 14 facing the side surface 14 on which the fins are formed.

  According to the radiator manufacturing method according to the fourth embodiment described above, the radiator 1B in which the main body 41, the through hole 42, and the fins 43 are integrally formed can be manufactured. Further, in the present embodiment, since the multi-cutter 20 is only moved in a straight line, it can be easily manufactured.

  Note that the multi-cutter 20 may be inserted into all four side surfaces 14 to form the fins 43 on the entire surface of the block 10 to be cut.

[Fifth embodiment]
Next, a radiator manufacturing method according to a fifth embodiment of the present invention will be described. As shown in FIG. 14, the radiator 1 </ b> C according to the fifth embodiment includes a main body 41 and fins 43.

  The main body 41 has a substantially rectangular parallelepiped shape and has a through hole 42 inside. The through hole 42 is a part through which fluid flows. The main body 41 is solid except for the through holes 42. The through hole 42 penetrates from the one end surface 12 to the other end surface 13. The fins 43 are erected vertically to the main body portion 41 and are arranged in parallel with the central axis C. The fins 43 are arranged in parallel at equal intervals, and are formed on both sides of the main body 41. The height of the fin 43 is about 1/3 of the total height of the radiator 1C.

  In the radiator manufacturing method according to the fifth embodiment, a preparation process and a cutting process are performed. The preparation process is the same as in the fourth embodiment.

  The cutting process is a process of forming the fins 43 by inserting the multi-cutter 20 into the block 10 to be cut as shown in FIG. In the cutting process, the multi-cutter 20 is arranged so that the plane having the normal axis as the center axis C and the plane having the normal line as the center line of the rotation shaft 21 are perpendicular to each other. The multi cutter 20 is inserted into one side. When the disk cutter 22 is inserted to the cutting depth d, the multi-cutter 20 is relatively moved linearly toward the other ridge line 14d while maintaining the cutting depth d.

  When the multi-cutter 20 is moved to a position where the center of the rotating shaft 21 and the other ridge line 14d overlap each other on the vertical line, the multi-cutter 20 is detached from the block 10 to be cut. The multi-cutter 20 may be detached in any of the horizontal direction, the vertical direction, and the diagonally upward direction. The heat sink 1C is completed by turning over the block 10 to be cut and performing the same cutting process on the side surface 14 facing the side surface 14 on which the fins are formed.

  According to the radiator manufacturing method according to the fifth embodiment described above, the radiator 1B in which the main body 41, the through hole 42, and the fins 43 are integrally formed can be manufactured. Moreover, since it only moves the multi cutter 20 linearly, it can manufacture easily.

[Sixth embodiment]
Next, a radiator manufacturing method according to a sixth embodiment of the present invention will be described. The manufacturing method of the radiator according to the sixth embodiment is different from the other embodiments in that the flow path portion 2 (through hole 11) is formed after the cutting process. The radiator formed in the sixth embodiment is equivalent to the radiator 1 according to the first embodiment.

  In the radiator manufacturing method according to the sixth embodiment, a preparation process, a cutting process, and a flow path portion forming process are performed. As shown in FIG. 16A, in the preparation process, a block to be cut 10A having a rectangular parallelepiped shape is prepared. A through hole is not formed in the block 10A to be cut.

  In the cutting process, the block 10 is cut using the multi-cutter 20 in the same manner as in the first embodiment, and as shown in FIG. A plurality of integrally formed fins 3 are formed. In the cutting process, cutting is performed at a distance s from the central axis C. The distance s is the radius of the flow path part. The solid portion 51 has a cylindrical shape and is formed from the one end surface 12 to the other end surface 13.

  In the flow path portion forming step, a drill is inserted along the axial direction of the solid portion 51 to form a through hole. Thereby, the flow path part provided with the through-hole which penetrates from the one end surface 12 to the other end surface 13 is formed.

  According to the radiator manufacturing method according to the sixth embodiment described above, the radiator can be easily manufactured by forming the through hole after the cutting step without using the extruded shape member provided with the through hole 11. be able to.

  In addition, when integrally forming the connecting pipe 4 and the flow path part 2, the to-be-cut block 10 in which the through-hole 11 was formed previously was used like 2nd embodiment, However, The rectangular parallelepiped shape without the through-hole 11 is used. A block to be cut may be prepared, and the flow path portion 2 and the connecting pipe 4 may be formed by drilling a through hole with a drill or the like after the cutting step is completed as in the sixth embodiment.

  Although the embodiments of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the present embodiment, the block 10 to be cut which has a rectangular parallelepiped in appearance is used, but the block to be cut may have a cylindrical shape or other polygonal column shape.

  Further, in the preparation step, the cutting step may be performed after the aluminum alloy shaped material is heated at about 200 degrees and then subjected to an aging treatment to harden the block 10 to be cut. By age-hardening the block 10 to be cut, cutting can be easily performed during the cutting process. Further, the strength of the fin 3 can be improved.

  Moreover, in the heat radiator which concerns on this embodiment, although the one through-hole 11 is provided, there may exist two or more through-holes 11. FIG. Further, the rotation directions of the block 10 to be cut and the multi-cutter 20 are not limited to the illustrated directions.

DESCRIPTION OF SYMBOLS 1 Heat radiator 2 Flow path part 3 Fin 4 Connecting pipe 11 Through-hole 12 One end surface 13 Other end surface 14 Side 14a Ridge line 14d Ridge line 20 Multi cutter 21 Rotating shaft 22 Disc cutter 41 Main body part 42 Through-hole 43 Fin 51 Solid part C center Axis d Cutting depth t Distance

Claims (13)

A method of manufacturing a radiator in which fins are integrally formed around a flow path part,
A preparation step of preparing a block to be cut that has a through-hole that penetrates from one end surface to the other end surface facing the one end surface and serves as the flow path portion;
A multi-cutter having a plurality of disk cutters stacked with a gap therebetween and the block to be cut are moved relative to each other to cut the block to be cut, while leaving an uncut region around the through hole. A method of manufacturing a radiator, comprising: a cutting step of forming fins.   In the cutting step, the central axis of the through hole and the rotation axis of the multi-cutter are arranged in parallel, and the cutting block is rotated while the disk cutter and the cutting block are in contact with each other. The manufacturing method of the heat radiator of Claim 1 characterized by these.   The method for manufacturing a radiator according to claim 2, wherein in the cutting step, the block to be cut is rotated one or more times.   In the cutting step, the central axis of the through hole and the rotation axis of the multi-cutter are arranged in parallel, and the disk cutter and the block to be cut are brought into contact with each other while the disk block and the block to be cut are in contact with each other. The method for manufacturing a radiator according to claim 1, wherein the multi-cutter is revolved.   The method for manufacturing a radiator according to claim 4, wherein in the cutting step, the multi-cutter is revolved one or more times.   In the cutting step, the center axis of the through hole and the rotation axis of the multi-cutter are arranged so as to be parallel, and the disk cutter and the block to be cut are relatively moved linearly while being in contact with each other. The manufacturing method of the heat radiator of Claim 1.   In the cutting step, the center axis of the through-hole and the rotation axis of the multi-cutter are arranged so as to be perpendicular, and the disk cutter and the block to be cut are brought into contact with each other and linearly moved together. The manufacturing method of the heat radiator of Claim 1 characterized by the above-mentioned.   The method for manufacturing a radiator according to claim 6 or 7, wherein, in the cutting step, a plurality of the fins are formed on both sides of the through hole.   It includes a connecting pipe forming step of forming a connecting pipe communicating with the through hole by cutting so that an uncut region is formed around the through hole at at least one of both ends of the block to be cut. The manufacturing method of the heat radiator as described in any one of Claim 1 thru | or 8.   The method for manufacturing a radiator according to any one of claims 1 to 9, wherein the block to be cut is an extruded shape made of aluminum or an aluminum alloy. A method of manufacturing a radiator in which fins are integrally formed around a flow path part,
A preparation step of preparing a block to be cut;
A multi-cutter having a plurality of disk cutters stacked with a gap therebetween and the block to be cut are moved relative to each other to cut the block to be cut, and the fin around the solid part and the solid part. Cutting process to form
A flow path portion forming step of forming a through hole in the solid portion formed in the cutting block in the cutting step along a central axis direction to form the flow path portion. The manufacturing method of the radiator.   A heat radiator comprising a flow path portion through which a fluid flows and a plurality of fins integrally formed with the flow path portion around the flow path portion.   The radiator according to claim 12, further comprising a connecting pipe integrally formed in the flow path portion.

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