JP5754431B2 - Heat sink manufacturing method and heat transfer plate manufacturing method - Google Patents

Description

  The present invention relates to a heat sink manufacturing method and a heat transfer plate manufacturing method.

  Patent Document 1 discloses a method of manufacturing a heat sink by cutting a block to be cut that includes a base plate and a block portion formed on the base plate. In the heat sink manufacturing method, the block portion is cut with a multi-cutter to form a plurality of fins. In the multi-cutter, a plurality of disk cutters are stacked with a gap. A plurality of fins standing on the base plate can be formed by moving the multi-cutter relative to the block portion while the disk cutter is rotated.

JP 2009-56520 A

  In the conventional manufacturing method, when the multi-cutter is inserted into the block portion, friction between the disk cutter and the fin (block portion) during the cutting process is increased, and smooth rotation of the disk cutter may be hindered. If the disk cutter does not rotate smoothly, there is a possibility that the waving phenomenon of the formed fins occurs or the fins and the disk cutter are damaged.

  From such a viewpoint, an object of the present invention is to provide a method of manufacturing a heat sink and a method of manufacturing a heat transfer plate that can improve formability and workability.

  In order to solve such a problem, the present invention provides a friction stirring step for performing friction stirring on the surface of the block to be cut, and a multi-cutter in which a plurality of disk cutters are stacked, and a plurality of pieces are provided on the back side of the block to be cut. A cutting step of forming fins, wherein in the cutting step, cutting is performed in a state in which a tensile stress is applied to the back surface of the block to be cut due to thermal contraction after the friction stirring step.

  The present invention also includes a lid groove closing step of inserting a lid plate into a lid groove formed around a concave groove that opens on the surface of the block to be cut, a side wall of the lid groove, and a side surface of the lid plate. A joining step of performing frictional stirring along the abutting portion, and a cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and in the cutting step, Cutting is performed in a state in which a tensile stress is applied to the back surface of the block to be cut by heat shrinkage after the joining step.

  The present invention also includes a lid plate insertion step of inserting a lid plate into the groove that opens on the surface of the block to be cut, and friction stir along the abutting portion between the side wall of the groove and the side surface of the lid plate. A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and in the cutting step, by heat shrinkage after the joining step, Cutting is performed in a state where tensile stress is applied to the back surface of the block to be cut.

  Further, the present invention provides a heat medium tube insertion step of inserting a heat medium tube into a concave groove formed in a bottom surface of a cover groove opened on the surface of the block to be cut, and inserting a cover plate into the cover groove. A lid groove closing step, a joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and a back side of the block to be cut by a multi-cutter in which a plurality of disk cutters are stacked A cutting step of forming a plurality of fins, wherein in the cutting step, cutting is performed in a state in which tensile stress is applied to the back surface of the block to be cut due to thermal contraction after the joining step.

  Also, a heat medium tube insertion step of inserting a heat medium tube into a groove opened on the surface of the block to be cut, a cover plate insertion step of inserting a cover plate into the groove, and a side wall of the groove A joining step of performing frictional stirring along the abutting portion with the side surface of the lid plate, and a cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked. In the cutting step, cutting is performed in a state in which tensile stress is applied to the back surface of the block to be cut due to thermal contraction after the joining step.

  In this manufacturing method, the cutting process is performed in a state in which warpage occurs in the block to be cut due to thermal contraction after friction stirring, and tensile stress acts on the back surface of the block to be cut. Thereby, the friction between a disk cutter and a fin can be made small compared with the past. Therefore, a disk cutter can be rotated smoothly and a moldability and workability | operativity can be improved. Further, since frictional heat is also generated on the back side of the block to be cut by the cutting process, the warp generated in the block to be cut can be corrected by heat shrinkage caused by the frictional heat.

  Moreover, it is preferable to include the burr cutting process which cuts the burr | flash produced by the said friction stirring from the surface of the said to-be-cut block. According to this manufacturing method, the surface of the block to be cut can be smoothed.

  In the joining step, it is preferable that a plastic fluidized material fluidized by frictional heat flows into a gap formed around the heat medium pipe.

  According to this manufacturing method, since the space | gap around the pipe | tube for heat media can be made small, watertightness and airtightness can be improved.

  Further, in the joining step, the cover plate presses the upper part of the heat medium pipe by the pressing force of the rotary tool for friction stirring, and at least the upper part of the cover plate and the block to be cut are frictionally stirred. Is preferred.

  According to this manufacturing method, since the heat medium pipe and the block to be cut can be brought into close contact with each other, the gap around the heat medium pipe can be reduced, and water tightness and air tightness can be improved.

  Further, the present invention is a method of manufacturing a heat sink using a block to be cut having a base plate and a block portion formed on the back surface of the base plate, and the back surface of the base plate includes the block portion. An exposed part that is exposed to the surroundings is formed, and a plurality of fins are formed on the back side of the block part by a friction stirring process that performs friction stirring on the surface of the base plate and a multi-cutter in which a plurality of disk cutters are stacked. Cutting, and in the cutting step, cutting is performed in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the friction stirring step.

  The present invention is also a method for manufacturing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate, wherein the back surface of the base plate includes An exposed portion that is exposed to the periphery is formed, a lid groove closing step of inserting a lid plate into a lid groove formed around a concave groove that opens on the surface of the base plate, a side wall of the lid groove, and the A joining step of performing frictional stirring along the abutting portion with the side surface of the cover plate, and a cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are stacked, In the cutting step, cutting is performed in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step.

  The present invention is also a method for manufacturing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate, wherein the back surface of the base plate includes An exposed portion that is exposed to the periphery is formed, and a lid plate insertion step of inserting a lid plate into the concave groove that opens on the surface of the base plate; and a butt portion between the side wall of the concave plate and the side surface of the lid plate And a cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are stacked, and in the cutting step, after the joining step It cuts in the state in which the tensile stress acted on the back surface of the said block part by heat contraction of this.

  The present invention is also a method for manufacturing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate, wherein the back surface of the base plate includes A heat medium tube inserting step of inserting a heat medium tube into a concave groove formed in a bottom surface of a cover groove opened on a surface of the base plate, wherein an exposed portion that is exposed to the periphery is formed; and the lid A multi-cutter in which a lid groove closing step of inserting a lid plate into the groove, a joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate, and a plurality of disk cutters are laminated A cutting step of forming a plurality of fins on the back side of the block portion, and in the cutting step, cutting is performed in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step. It is characterized by that.

  Further, a method of manufacturing a heat transfer plate using a block to be cut having a base plate and a block portion formed on the back surface of the base plate, wherein the back surface of the base plate is around the block portion. A heat medium tube insertion step in which a heat medium tube is inserted into a concave groove that is formed on the surface of the base plate, and a lid plate insertion step in which a lid plate is inserted into the concave groove. A plurality of fins on the back side of the block portion by a joining step of performing frictional stirring along the abutting portion between the side wall of the groove and the side surface of the cover plate, and a multi-cutter in which a plurality of disk cutters are stacked. A cutting process to be formed, wherein the cutting process is performed in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining process.

  In such a manufacturing method, the cutting process is performed in a state in which warpage occurs in the block to be cut due to thermal contraction after friction stirring, and tensile stress acts on the back surface of the block portion. Thereby, the friction between a disk cutter and a fin can be made small compared with the past. Therefore, a disk cutter can be rotated smoothly and a moldability and workability | operativity can be improved. Further, since frictional heat is also generated on the back side of the block to be cut by the cutting process, the warp generated in the block to be cut can be corrected by heat shrinkage caused by the frictional heat.

  Moreover, according to this manufacturing method, since the exposed part is formed around the block part, it is possible to secure, for example, a margin for attaching a cover member or the like covering the fin around the fin formed by cutting.

  Moreover, it is preferable to include a burr cutting step of cutting a burr generated by the friction stirring from the surface of the base plate. According to this manufacturing method, the surface of the block to be cut can be smoothed.

  In the joining step, it is preferable that a plastic fluidized material fluidized by frictional heat flows into a gap formed around the heat medium pipe.

  According to this manufacturing method, since the space | gap around the pipe | tube for heat media can be made small, watertightness and airtightness can be improved.

  Further, in the joining step, the lid plate presses the upper portion of the heat medium pipe by the pressing force of the rotary tool for friction stirring, and at least the upper portion of the lid plate and the base plate are frictionally stirred. preferable.

  According to this manufacturing method, since the heat medium pipe and the block to be cut or the base plate can be brought into close contact with each other, the gap around the heat medium pipe can be reduced, and water tightness and air tightness are improved. Can do.

  According to the heat sink manufacturing method and the heat transfer plate manufacturing method according to the present invention, the moldability and workability can be improved.

It is a perspective view which shows the heat exchanger plate which concerns on 1st embodiment of this invention. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows a preparatory process, (b) shows a cover groove | channel obstruction | occlusion process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) shows in the joining process, (b) shows after a joining process. It is a figure which shows the manufacturing method of the heat exchanger plate which concerns on 1st embodiment, Comprising: (a) is sectional drawing before a cutting process, (b) is a side view which shows the inside of a cutting process. It is a perspective view which shows the heat exchanger plate which concerns on 2nd embodiment of this invention. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) shows a preparatory process, (b) shows a cover plate insertion process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment, Comprising: (a) shows in the joining process, (b) shows after a joining process. It is a perspective view which shows the heat exchanger plate which concerns on 3rd embodiment of this invention. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment, Comprising: (a) shows a preparatory process, (b) shows a cover groove | channel obstruction | occlusion process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment, Comprising: (a) shows in the joining process, (b) shows after a joining process. It is sectional drawing which shows the modification of the manufacturing method of the heat exchanger plate which concerns on 3rd embodiment. It is a perspective view which shows the heat exchanger plate which concerns on 4th embodiment of this invention. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, Comprising: (a) shows a preparatory process, (b) shows a cover plate insertion process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 4th embodiment, Comprising: (a) shows in the joining process, (b) shows after a joining process. It is a perspective view which shows the heat exchanger plate which concerns on 5th embodiment. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 5th embodiment, Comprising: (a) shows the perspective view which shows a to-be-cut block, (b) shows a preparatory process. It is sectional drawing which shows the manufacturing method of the heat exchanger plate which concerns on 5th embodiment, Comprising: (a) shows in the joining process, (b) shows after a joining process. It is sectional drawing which shows the cutting process of the manufacturing method of the heat exchanger plate which concerns on 5th embodiment. It is a perspective view which shows the heat exchanger plate which concerns on 6th embodiment. It is a perspective view which shows the heat exchanger plate which concerns on 7th embodiment. It is a perspective view which shows the heat exchanger plate which concerns on 8th embodiment. It is a perspective view which shows the heat sink which concerns on 9th embodiment. It is a figure which shows the manufacturing method of the heat sink which concerns on 9th embodiment, Comprising: (a) is a perspective view which shows a friction stirring process, (b) is sectional drawing after a friction stirring process. It is a perspective view which shows the manufacturing method of the heat sink which concerns on 10th embodiment, Comprising: (a) shows after a cutting process, (b) shows after a friction stirring process.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. The heat transfer plate 1 according to the first embodiment is mainly configured by a base portion 2, a plurality of fins 3, and a cover plate 4. The heat transfer plate 1 is, for example, an instrument that cools an object by circulating a fluid through the hollow portion of the base portion 2.

  The base portion 2 has a substantially rectangular parallelepiped shape. A concave groove 5 and a cover groove 6 are formed in the base portion 2. A cover plate 4 is embedded in the surface 2 a of the base body 2. A plurality of fins 3 are formed on the back surface 2 b of the base body 2.

  The fins 3 are integrally formed with the base portion 2. The fins 3 are arranged in parallel at equal intervals, and are extended in parallel with the longitudinal direction of the base body 2. The material of the base portion 2 and the fin 3 is not particularly limited as long as it can be frictionally stirred and can be cut, but in this embodiment, an aluminum alloy is used.

  The lid plate 4 is a metal member disposed in the lid groove 6. Although the material of the cover plate 4 is not particularly limited, in the present embodiment, the cover plate 4 is formed of an aluminum alloy as with the base body portion 2. The lid plate 4 has a shape that is inserted into the lid groove 6 without a gap.

  The concave groove 5 is a groove formed inside the base portion 2. The recessed groove 5 is recessed on the bottom surface of the lid groove 6. The concave groove 5 has a U shape in cross section and a U shape in plan view. The concave groove 5 is a portion that becomes a fluid flow path. Both end portions of the concave groove 5 are open to the side surface 2c.

  The lid groove 6 is wider than the concave groove 5, and is formed continuously with the concave groove 5 on the surface 2 a side of the concave groove 5. The lid groove 6 has a rectangular shape in sectional view and opens on the surface 2a side.

  The base portion 2 and the cover plate 4 are joined by friction stirring. In the present embodiment, the two plasticized regions W and W are formed by performing friction stir welding along the abutting portions J and J between the base portion 2 and the cover plate 4.

  Next, a method for manufacturing the heat transfer plate according to this embodiment will be described. In the method for manufacturing a heat transfer plate, a preparation process, a cover groove closing process, a joining process, and a cutting process are performed.

  As shown to (a) of FIG. 2, a preparation process is a process of preparing the to-be-cut block 10 and the cover board 4. As shown in FIG. The block 10 to be cut is a block made of an aluminum alloy which is a base of the base portion 2 and the fins 3 and has a substantially rectangular parallelepiped shape. In the preparation step, first, the block 10 to be cut is fixed to the gantry K via a clamp (not shown), and then the surface 10a of the block 10 to be cut is cut with an end mill or the like to form the lid groove 6. A concave groove 5 narrower than the cover groove 6 is formed on the bottom surface of the groove.

  In this embodiment, the block 10 to be cut is formed by cutting. However, for example, a shaped material in which the concave groove 5 and the cover groove 6 are formed in advance by die casting or the like may be used as the block 10 to be cut.

  As shown in FIG. 2B, the lid groove closing step is a step of inserting the lid plate 4 into the lid groove 6. When the lid plate 4 is inserted into the lid groove 6, the pair of side walls of the lid groove 6 and the pair of side surfaces of the lid plate 4 are abutted to form the abutting portions J and J. When the lid groove closing step is performed, the lid groove 6 and the lid plate 4 are fixed with a clamp so that the lid groove 6 and the lid plate 4 do not move.

  As shown to (a) of FIG. 3, a joining process is a process of performing friction stir welding with respect to the butt | matching parts J and J with the rotary tool F. As shown in FIG. The rotary tool F includes a columnar shoulder Fa and a pin Fb depending from the lower end surface of the shoulder Fa. In the joining step, friction stir welding is performed so that the plasticized region W is formed over the entire length of the abutting portion J in the depth direction.

  In addition, although illustration is omitted, friction stir welding may be performed by arranging a tab material on the end surface of the block 10 to be cut and setting the start point and the end point of the rotary tool F on the tab material. Thereby, workability is improved and the finished surface can be cleaned.

  As shown in FIG. 3B, after performing the joining process, when the clamp of the gantry K is released and the block 10 to be cut is left as it is, heat shrinkage occurs in the plasticized regions W and W, and the surface It deform | transforms so that 10a may become concave shape. That is, the block 10 to be cut is warped so as to be convex toward the back surface 10b, compressive stress is generated on the front surface 10a side, and tensile stress is generated on the back surface 10b side.

  As shown to (a) of FIG. 4, a cutting process is a process of cutting the to-be-cut block 10 using the multi cutter M, and forming a fin. First, the front and back of the block to be cut 10 are turned over, and the block 10 to be cut is fixed via a clamp with the gantry K and the surface 10a facing each other. During the cutting process, clamping is performed so that tensile stress acts on the back surface 10b and compressive stress acts on the front surface 10a.

  The multi-cutter M is composed of a rotation axis Ma and a plurality of disk cutters Mb formed on the rotation axis Ma. The disk cutter Mb has a disk shape, and a blade is formed at the periphery. The disk cutter Mb is arranged perpendicular to the rotation axis Ma. The thickness of the disk cutter Mb is equal to the gap between the fins 3 and 3 to be formed. The gap between the disk cutters Mb and Mb is equal to the thickness of the fin 3 to be formed.

  In the cutting step, the multi-cutter M is arranged so that the plane whose normal is the central axis of the rotation axis Ma and the installation surface of the gantry K are perpendicular to each other, and then cutting is performed in a state where the parallelism is maintained. As shown in FIG. 4B, in the cutting step, the central axis of the rotation axis Ma is arranged on a vertical line passing through the ridge line 10e on the upper side of the block 10 to be cut, and then the multi-cutter M is directed toward the ridge line 10e. Lower to a predetermined depth.

  Then, the block 10 to be cut and the multi-cutter M are relatively moved to the ridge line 10f while maintaining a predetermined depth. The moving direction of the multi-cutter M with respect to the block 10 to be cut is such that a virtual cut surface (10 g in FIG. 4A) is upwardly convex when the block 10 is cut along a vertical plane including the rotation axis Ma. Set to be. In the present embodiment, as shown in FIG. 4B, the multi-cutter M is moved from the ridge line 10e that is convex upward toward the ridge line 10f that is also convex upward.

  When the vertical line passing the ridge line 10f on the upper side of the block 10 to be cut and the central axis of the rotation axis Ma are moved, the multi-cutter M is moved upward to be separated from the block 10 to be cut. Through the above steps, the heat transfer plate 1 shown in FIG. 1 is manufactured.

  According to the method for manufacturing a heat transfer plate according to the present embodiment described above, heat shrinkage occurs by frictional stirring on the surface 10a of the block 10 to be cut, and tensile stress acts on the back surface 10b of the block 10 to be cut. Then, compressive stress acts on the surface 10a. Since the cutting process is performed in a state where tensile stress is applied to the back surface 10b of the block 10 to be cut, the disk cutter Mb is hardly sandwiched between the fins 3 and 3. That is, since the cutting is performed in a state in which the compressive stress is applied to the front surface 10a and the tensile stress is applied to the back surface 10b, when the fins 3 and 3 are formed, the fins 3 and 3 are slightly opened away from each other. Therefore, the disk cutter Mb is less likely to be restrained by the fins 3, the friction between the disk cutter Mb and the fins 3 can be reduced as compared with the conventional case, and the disk cutter Mb can be smoothly rotated. Therefore, the waviness phenomenon etc. of the fin 3 can be prevented, so that the moldability can be improved. In addition, since the load on the multi-cutter M can be reduced, the disk cutter Mb can rotate stably and workability can be improved.

  Further, frictional heat is also generated on the back surface 10b side of the block 10 to be cut by the cutting process. The warp of the block 10 to be cut generated in the joining process can be corrected by the heat shrinkage caused by the frictional heat. Thereby, the heat-transfer plate 1 with high flatness can be formed.

  Moreover, a heat-transfer plate with high heat conductivity can be manufactured by integrally forming the base portion 2 and the fins 3 by a cutting process. Moreover, the thickness of the fin 3 and the clearance gap between the fins 3 and 3 can be set easily by using the multi-cutter M.

  In the present embodiment, the longitudinal direction of the fins 3 and the longitudinal direction of the block 10 to be cut are arranged in parallel, but they may be arranged so as to intersect with each other. Further, warpage of the block 10 to be cut may be corrected by deforming the block 10 to be cut by roll forming or pressing.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 5, the heat transfer plate 1 </ b> A according to the second embodiment is mainly configured by a base portion 2, fins 3, and a cover plate 4. 1 A of heat exchanger plates differ from 1st embodiment by the point which is not provided with the cover groove | channel 6. FIG. In the second embodiment, the description will focus on the parts that are different from the first embodiment.

  A concave groove 5 is formed in the base portion 2 to serve as a fluid flow path. The concave groove 5 has a U shape in cross section and a U shape in plan view. The concave groove 5 is open to the surface 2a of the base portion 2, and both end portions are open to the side surface 2c. The cover plate 4 has a rectangular shape in cross section and a U shape in plan view. The cover plate 4 is disposed above the concave groove 5 without a gap.

  The base portion 2 and the cover plate 4 are joined by friction stirring. In the present embodiment, a single plasticized region W is formed by friction stir welding with the abutting portions J and J between the base portion 2 and the lid plate 4.

  Next, the manufacturing method of the heat exchanger plate of this embodiment is demonstrated. In the method for manufacturing a heat transfer plate, a preparation process, a cover plate insertion process, a joining process, and a cutting process are performed.

  As shown to (a) of FIG. 6, a preparation process is a process of preparing the to-be-cut block 10 and the cover board 4. As shown in FIG. The block 10 to be cut is a block made of an aluminum alloy which is a base of the base portion 2 and the fins 3 and has a substantially rectangular parallelepiped shape. In the preparation step, first, the block 10 to be cut is fixed to the mount K via a clamp, and then the surface 10a of the block 10 to be cut is cut with an end mill or the like to form the groove 5.

  As shown in FIG. 6B, the cover plate insertion step is a step of inserting the cover plate 4 into the concave groove 5. The width of the cover plate 4 is equal to the width of the upper portion of the concave groove 5. When the cover plate 4 is inserted into the concave groove 5, the upper surface of the cover plate 4 and the surface 10a are flush with each other.

  As shown to (a) of FIG. 7, a joining process is a process of performing friction stir welding with respect to the abutting parts J and J with the rotary tool F. As shown in FIG. The outer diameter of the shoulder Fa of the rotary tool F is slightly larger than the width of the concave groove 5.

  As shown in FIG. 7B, after performing the joining process, when the clamp of the gantry K is released and the block 10 to be cut is left as it is, thermal shrinkage occurs in the plasticized region W, and the surface 10a becomes Deforms to be concave. That is, the block 10 to be cut is warped so as to be convex toward the back surface 10b, compressive stress is generated on the front surface 10a side, and tensile stress is generated on the back surface 10b side.

  In the cutting process, as described with reference to FIG. 4 of the first embodiment, using the multi-cutter M, the back surface 10b of the block 10 to be cut is cut to form the plurality of fins 3.

  The effect substantially equivalent to 1st embodiment can be acquired also by the manufacturing method of the heat exchanger plate which concerns on 2nd embodiment demonstrated above. Further, in the present embodiment, the lid groove 6 is omitted and the width of the lid plate 4 is narrower than that of the first embodiment, so that the abutting portions J and J are friction stir welded by a single movement of the rotary tool F. Can do. Thereby, work labor can be reduced.

[Third embodiment]
A third embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 8, the heat transfer plate 1 </ b> B according to the third embodiment is mainly configured by a base portion 2, fins 3, a cover plate 4, and a heat medium pipe 7. The heat transfer plate 1 </ b> B is different from the first embodiment in that it includes a heat medium pipe 7. In the third embodiment, a description will be given focusing on the parts that are different from the first embodiment.

  The heat medium pipe 7 is a cylindrical member having a hollow portion therein, and is formed of copper in this embodiment. The heat medium pipe 7 is formed in a U shape in plan view so as to be disposed in the concave groove 5.

  In the method for manufacturing a heat transfer plate according to the third embodiment, a preparation step, a heat medium tube insertion step, a lid groove closing step, a joining step, and a cutting step are performed.

  As shown to (a) of FIG. 9, a preparation process is a process of preparing the to-be-cut block 10, the heat | fever medium pipe | tube 7, and the cover plate 4. FIG. The block 10 to be cut is a block made of an aluminum alloy which is a base of the base portion 2 and the fins 3 and has a substantially rectangular parallelepiped shape. In the preparation step, first, the block 10 to be cut is fixed to the gantry K via a clamp, and then the surface 10a of the block 10 to be cut is cut with an end mill or the like to form the lid groove 6, and the bottom surface of the lid groove 6 is recessed. Groove 5 is formed. Thereby, the ditch | groove 5 and the cover groove | channel 6 which show a planar view U-shape are formed. The depth and width of the concave groove 5 are formed to be approximately equal to the outer diameter of the heat medium pipe 7.

  As shown in FIG. 9B, in the heat medium tube insertion step, the heat medium tube 7 is inserted into the concave groove 5. In the lid groove closing step, the lid plate 4 is inserted into the lid groove 6.

  As shown to (a) of FIG. 10, a joining process is a process of performing friction stir welding with respect to the butt | matching parts J and J with the rotary tool F. As shown in FIG. In a joining process, it sets so that the plasticization area | region W may be formed over the full length of the depth direction of the butt | matching part J. FIG.

  As shown in FIG. 10B, after the joining process is performed, when the clamp is released and the block 10 to be cut is left as it is, heat shrinkage occurs in the plasticized regions W and W, and the surface 10a has a concave shape. It transforms to become. That is, the block 10 to be cut is warped so as to be convex toward the back surface 10b, compressive stress is generated on the front surface 10a side, and tensile stress is generated on the back surface 10b side.

  In the cutting process, as described with reference to FIG. 4 of the first embodiment, using the multi-cutter M, the back surface 10b of the block 10 to be cut is cut to form the plurality of fins 3.

  Effects substantially the same as those of the first embodiment can also be obtained by the method for manufacturing a heat transfer plate according to the third embodiment described above. Moreover, according to the manufacturing method which concerns on this embodiment, the heat exchanger plate 1B provided with the pipe | tube 7 for heat media and the fin 3 can be formed easily.

  As shown in FIG. 11, in the joining step, friction stirring may be performed so that the plastic fluidized material flows around the heat medium pipe 7. In this modification, the width of the lid groove 6 and the lid plate 4 is shorter than that of the first embodiment.

  By the lid groove closing step, a gap Q surrounded by the outer peripheral surface of the heat medium pipe 7, the concave groove 5, and the lower surface of the lid plate 4 is formed. When the rotary tool F is inserted into the abutting portion J by the joining process, the metal around the pin Fb is fluidized and the plastic fluid material flows into the gap Q. Thereby, since the gap Q of the heat medium pipe 7 can be filled with the metal, the heat transfer plate 1B having high water tightness and high air tightness can be manufactured.

[Fourth embodiment]
A fourth embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 12, the heat transfer plate 1 </ b> C according to the fourth embodiment is a form close to the second embodiment, and is different from the second embodiment in that a heat medium pipe 7 is provided. In the fourth embodiment, a description will be given centering on portions that are different from the second embodiment.

  The heat medium pipe 7 is a cylindrical member having a hollow portion therein, and is formed of copper in this embodiment. The heat medium pipe 7 is formed in a U shape in plan view so as to be disposed in the concave groove 5.

  Next, the manufacturing method of the heat exchanger plate of this embodiment is demonstrated. In the heat transfer plate manufacturing method, a preparation step, a heat medium tube insertion step, a lid plate insertion step, a joining step, and a cutting step are performed.

  As shown to (a) of FIG. 13, a preparation process is a process of preparing the to-be-cut block 10, the heat | fever medium pipe | tube 7, and the cover plate 4. FIG. In the preparation step, first, the block 10 to be cut is fixed to the mount K with a clamp, and then the surface 10a of the block 10 to be cut is cut with an end mill or the like to form the groove 5. The bottom portion 5a of the concave groove 5 has an arc shape, and the upper portion 5b has a constant width.

  As shown in FIG. 13B, in the heat medium tube insertion step, the heat medium tube 7 is inserted into the bottom 5 a of the groove 5. In the lid plate insertion step, the lid plate 4 is inserted into the upper portion 5 b of the groove 5. Thereby, the upper surface of the cover plate 4 and the surface 10a become flush.

  As shown to (a) of FIG. 14, a joining process is a process of performing friction stir welding with respect to the butt | matching parts J and J with the rotary tool F. As shown in FIG. The outer diameter of the shoulder Fa of the rotary tool F is slightly larger than the width of the concave groove 5. Further, in the joining step, the cover plate 4 presses the upper part of the heat medium pipe 7 by the pressing force of the rotary tool F, and the upper part of the cover plate 4 and the block 10 to be cut are friction stir welded.

  As shown in FIG. 14 (b), after the joining process is performed, when the clamp of the gantry K is released and the block 10 to be cut is left as it is, heat shrinkage occurs in the plasticized region W, and the surface 10a becomes Deforms to be concave.

  In the cutting process, as described with reference to FIG. 4 of the first embodiment, using the multi-cutter M, the back surface 10b of the block 10 to be cut is cut to form the plurality of fins 3.

  According to the manufacturing method of the heat exchanger plate according to the fourth embodiment described above, it is possible to obtain substantially the same effect as that of the second embodiment. Moreover, according to this embodiment, 1 C of heat exchanger plates with which the heat medium pipe | tube 7 was embed | buried can be manufactured easily. Further, in the present embodiment, the lid groove 6 is omitted and the width of the lid plate 4 is narrower than that of the first embodiment, so that the abutting portions J and J are friction stir welded by a single movement of the rotary tool F. Can do. Thereby, work labor can be reduced.

[Fifth embodiment]
A fifth embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 15, the heat transfer plate 1 </ b> D according to the fifth embodiment mainly includes a base plate 21, a plurality of fins 22, and a lid plate 23. The heat transfer plate 1D is different from the first embodiment in that an exposed portion 26 exposed around the fins 22 is formed on the back surface 21b of the base plate 21.

  The base plate 21 has a plate shape. A concave groove 24 and a cover groove 25 are formed in the base plate 21. The fins 22 are formed perpendicular to the back surface 21 b of the base plate 21. The fins 22 have a plate shape and are formed at equal intervals. The fins 22 are formed in parallel with the longitudinal direction of the base plate 21.

  The lid plate 23 has the same shape as the lid groove 25. The lid plate 23 is disposed in the lid groove 25 without a gap. The lid plate 23 is preferably formed of the same material as the base plate 21. The lid plate 23 and the base plate 21 are joined by friction stirring.

  The concave groove 24 is a groove formed on the bottom surface of the lid groove 25. The concave groove 24 penetrates from one side surface 21c to the other side surface 21d. The lid groove 25 is wider than the concave groove 24 and is formed continuously with the concave groove 24. The lid groove 25 has a rectangular shape in sectional view and penetrates from one side surface 21c to the other side surface 21d.

  Next, the manufacturing method of the heat exchanger plate which concerns on 5th embodiment is demonstrated in detail with reference to drawings. In the method for manufacturing a heat transfer plate according to the present embodiment, a preparation process, a lid groove closing process, a joining process, and a cutting process are performed.

  As shown to (a) of FIG. 16, a preparation process is a process of preparing the block 31 to be cut. The block 31 to be cut includes a base plate 21 and a block portion 32 formed on the base plate 21. In the present embodiment, the block 31 to be cut is integrally formed by die casting. Although the kind in particular of the block 31 to be cut is not restrict | limited, In this embodiment, it is formed with the aluminum alloy.

  The block portion 32 is formed at the center of the back surface 21 b of the base plate 21. The block portion 32 has a rectangular parallelepiped shape and is smaller than the base plate 21. That is, the area of the front surface (back surface 32 b) of the block portion 32 is smaller than the area of the back surface 21 b of the base plate 21. An exposed portion 26 exposed around the block portion 32 is formed on the back surface 21 b of the base plate 21. The exposed portion 26 has a rectangular frame shape in plan view.

  As shown in FIG. 16 (b), in the preparation step, the concave groove 24 and the cover groove 25 are formed on the surface 21 a of the base plate 21. Specifically, after the block 31 to be cut is fixed to the gantry K via a clamp, the concave groove 24 and the cover groove 25 are formed on the surface 21a using an end mill or the like.

  The lid groove closing step is a step of inserting the lid plate 23 into the lid groove 25. By inserting the lid plate 23 into the lid groove 25, the side wall portion of the lid groove 25 and the side surface of the lid plate 23 are abutted to form an abutting portion.

  As shown to (a) of FIG. 17, a joining process is a process of performing friction stir welding with respect to a butt | matching part with the rotary tool F. As shown in FIG.

  As shown in FIG. 17B, after the joining process is performed, the clamp of the gantry K is released. If the work block 31 is left as it is, heat shrinkage occurs in the plasticized regions W and W, and the entire work block 31 is deformed so that the surface 21a side is concave. That is, the block 31 to be cut is warped so as to be convex toward the back surface 32b, compressive stress is generated on the front surface 21a side, and tensile stress is generated on the back surface 32b side.

  As shown in FIG. 18, the cutting process is a process of forming the plurality of fins 22 by cutting the block portion 32 using the multi-cutter M. First, the front and back of the block 31 to be cut are turned over, the gantry K and the base plate 21 are made to face each other, and the block 31 to be cut is fixed to the gantry K with a clamp. During the cutting process, clamping is performed so that tensile stress acts on the back surface 32b and compressive stress acts on the front surface 21a.

  In the cutting process, the multi-cutter M is installed so that the plane whose normal is the central axis of the rotation axis Ma and the installation surface of the gantry K are perpendicular to each other, and then cutting is performed while maintaining this parallel relationship. As shown in FIG. 18, in the cutting step, after the central axis of the rotation axis Ma is arranged on a vertical line passing through the ridge line 32 e of the block portion 32, the multi-cutter M is lowered toward the ridge line 32 e to a predetermined depth.

  When the multi-cutter M is lowered to a predetermined depth, the multi-cutter M is relatively moved toward the ridge line 32f of the block portion 32 while maintaining the depth. The moving direction of the multi-cutter M with respect to the block to be cut 31 is set so that the virtual cut surface when the block to be cut 31 is cut in a vertical plane including the rotation axis Ma is convex upward. In the present embodiment, the multi-cutter M is moved from the ridge line 32e that is convex upward to the ridge line 32f that is also convex upward.

  When the vertical line passing through the ridge line 32f of the block part 32 and the central axis of the rotation axis Ma are moved to a position where they overlap, the multi-cutter M is moved upward and separated from the block part 32. The heat transfer plate 1D shown in FIG. 15 is manufactured through the above steps.

  According to the method for manufacturing a heat transfer plate according to the present embodiment described above, thermal shrinkage occurs by frictional stirring on the surface 21 a of the base plate 21, and tensile stress acts on the back surface 32 b of the block portion 32. Since the cutting process is performed in a state in which a tensile stress is applied to the back surface 32b of the block portion 32, the disk cutter Mb is hardly sandwiched between the fins 22 and 22. That is, since the cutting is performed in a state in which the compressive stress is applied to the front surface 21a and the tensile stress is applied to the back surface 32b, when the fins 22 and 22 are formed, the fins 22 and 22 are slightly opened in a direction away from each other. Therefore, the disk cutter Mb is less likely to be restrained by the fins 3, the friction between the disk cutter Mb and the fins 22 can be reduced compared to the conventional case, and the disk cutter Mb can be rotated smoothly. Thereby, while being able to improve workability | operativity, the moldability of the fin 22 can be improved.

  Further, frictional heat is also generated on the back surface 32b side of the block portion 32 by the cutting process. The warp generated in the block 31 to be cut can be corrected by the heat shrinkage caused by the frictional heat.

  Further, by using the multi-cutter M, the thickness of the fin 22 and the gap between the fins 22 and 22 can be easily set.

  Further, the heat transfer plate 1D of the fifth embodiment includes an exposed portion 26 where the fins 22 are not formed on the back surface 21b of the base plate 21. Since the exposed portion 26 is formed so as to surround the periphery of the group of fins 22, it can be used as a mounting allowance for a cover member or other mounting member that covers the group of fins 22.

  In addition, although the exposed part 26 is provided over the perimeter of the fin 22 group in this embodiment, it may be provided only in a part of the fin 22 group. In the present embodiment, the longitudinal direction of the fins 22 and the longitudinal direction of the base plate 21 are arranged in parallel, but they may be arranged so as to intersect each other.

[Sixth embodiment]
A sixth embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 19, the heat transfer plate 1 </ b> E according to the sixth embodiment is mainly configured by a base plate 21, a plurality of fins 22, and a cover plate 23. The heat transfer plate 1E is different from the fifth embodiment in that it does not have the cover groove 25. Since the configuration around the cover plate 23 and the recessed groove 24 of the fifth embodiment is substantially the same as that of the second embodiment, detailed description thereof is omitted. Further, the configuration of the fins 22 of the fifth embodiment is substantially the same as that of the fifth embodiment, and thus detailed description thereof is omitted.

[Seventh embodiment]
A seventh embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 20, the heat transfer plate 1 </ b> F according to the seventh embodiment mainly includes a base plate 21, a plurality of fins 22, a cover plate 23, and a heat medium pipe 27. The heat transfer plate 1F is different from the fifth embodiment in that it includes a heat medium pipe 27. Since the configuration around the lid plate 23, the concave groove 24, the lid groove 25, and the heat medium pipe 27 of the seventh embodiment is substantially the same as that of the third embodiment, detailed description thereof is omitted. Further, the configuration of the fins 22 of the seventh embodiment is substantially the same as that of the fifth embodiment, and thus detailed description thereof is omitted.

[Eighth embodiment]
An eighth embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 21, the heat transfer plate 1 </ b> G according to the eighth embodiment is mainly configured by a base plate 21, a plurality of fins 22, a cover plate 23, and a heat medium pipe 27. The heat transfer plate 1G is different from the sixth embodiment in that it includes a heat medium pipe 27. Since the configuration around the cover plate 23, the recessed groove 24, and the heat medium pipe 27 of the eighth embodiment is substantially the same as that of the sixth embodiment, detailed description thereof is omitted. Further, the configuration of the fins 22 of the eighth embodiment is substantially the same as that of the fifth embodiment, and thus detailed description thereof is omitted.

[Ninth embodiment]
A ninth embodiment of the present invention will be described with reference to the drawings. As illustrated in FIG. 22, the heat sink 1 </ b> H according to the ninth embodiment includes a base portion 41 and a plurality of fins 42.

  The manufacturing method of the heat sink concerning a ninth embodiment performs a friction stirring process and a cutting process. As shown in FIG. 23A, in the friction stirring step, friction stirring is performed on the block 51 to be cut. The block 51 to be cut is an aluminum alloy serving as a base of the base portion 41 and the fins 42 and has a rectangular parallelepiped shape. In the friction agitation step, the block 51 to be cut is fixed to the mount K via a clamp, and then the rotated rotary tool F is moved onto the surface 51a of the block 51 to be cut. Although the movement trajectory of the rotary tool F for friction stirring is not particularly limited, in the present embodiment, it is moved in a circular shape. A plasticized region W is formed in the movement trajectory of the rotary tool F.

  When the friction stirring step is completed, the clamp is released and the block 51 to be cut is left as it is. Thermal contraction occurs in the plasticized region W of the block 51 to be cut, and the surface 51a side is deformed to be concave. That is, the block 51 to be cut is warped so as to be convex toward the back surface 51b, compressive stress is generated on the front surface 51a side, and tensile stress is generated on the back surface 51b side.

  In the cutting process, although not specifically illustrated, the multi-cutter is used to cut the back surface 51b of the block 51 to be cut on which the tensile stress is applied in the same manner as the cutting process shown in FIG. 4 of the first embodiment. To form fins.

  Also in the heat sink manufacturing method according to the ninth embodiment, thermal contraction occurs by frictional stirring on the surface 51a of the block 51 to be cut, and tensile stress acts on the back surface 51b of the block 51 to be cut. Since the cutting process is performed in a state where the tensile stress is applied to the back surface 51b of the block 51 to be cut, the disk cutter is difficult to be sandwiched between the fins 42 and 42. Thereby, since the friction between a disk cutter and the fin 42 can be made small compared with the past, a disk cutter can be rotated smoothly. Therefore, workability can be improved, the waviness phenomenon of the fins 3 can be prevented, and the moldability can be improved.

  Further, frictional heat is also generated on the back surface 51b side of the block 51 to be cut by the cutting process. The warp of the block 51 to be cut generated in the friction stir process can be corrected by the heat shrinkage caused by the frictional heat. Thereby, the heat sink 1H with high flatness can be formed.

[Tenth embodiment]
Next, a tenth embodiment of the present invention will be described. As shown in FIG. 24A, the heat sink 1J according to the tenth embodiment includes a base plate 61 and a plurality of fins 62. The heat sink 1J is different from the ninth embodiment in that an exposed portion 64 exposed around the fins 62 is formed on the back surface 61b of the base plate 61.

  In the heat sink manufacturing method according to the tenth embodiment, a preparation process, a friction stirring process, and a cutting process are performed. As shown in FIG. 24B, in the preparation step, a block 71 to be cut is prepared. The block 71 to be cut is composed of a base plate 61 and a block portion 63. The block 71 to be cut is made of a metal member that can be frictionally stirred, and is integrally formed by die casting.

  The block part 63 is formed at the center of the back surface 61 b of the base plate 61. The block 63 has a rectangular parallelepiped shape and is smaller than the base plate 61. That is, the area of the front surface (back surface 63 b) of the block portion 63 is smaller than the area of the back surface 61 b of the base plate 61. An exposed portion 64 that is exposed around the block portion 63 is formed around the back surface 61 b of the base plate 61.

  As shown in FIG. 24 (b), in the friction stirring step, the rotating tool F is used to perform friction stirring on the surface 61 a of the base plate 61. In the cutting process, the fins 62 are formed in the same manner as in FIG. 18 described in the fifth embodiment. Thereby, the heat sink 1J is formed.

  According to the heat sink manufacturing method described above, substantially the same effects as those of the ninth embodiment can be obtained. Moreover, since the exposed part 64 is formed around the fin 62 group, it can be used as an attachment allowance for a cover member or other attachment member that covers the fin 62 group.

  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, after the joining step and the friction stirring step of each embodiment, a burr cutting step of cutting off burrs generated by friction stirring of the rotary tool F from the surface of the block to be cut or the base plate may be performed. Thereby, the surface of a to-be-cut block or a base board can be smoothed.

  Further, the number and shape of the concave grooves 5 and 24 through which the fluid flows and the heat medium pipes 7 and 27, the arrangement positions, and the like may be appropriately designed depending on the use of the heat transfer plate. Further, the method of forming the block to be cut is not limited to die casting, and the extruded block may be formed by cutting. In the present embodiment, the block to be cut having a rectangular shape in plan view is used. However, for example, a block to be cut having a circular shape, an elliptical shape, or another polygonal shape in plan view may be used.

  Moreover, you may perform the annealing process which anneals with respect to the to-be-cut block 10 and 31 after a joining process or a friction stirring process. Thereby, since the process distortion which arose in the to-be-cut blocks 10 and 31 can be removed and a structure | tissue can be softened, the cutting process which forms a fin can be performed suitably.

DESCRIPTION OF SYMBOLS 1 Heat-transfer plate 1A Heat-transfer plate 1B Heat-transfer plate 1C Heat-transfer plate 1D Heat-transfer plate 1E Heat-transfer plate 1F Heat-transfer plate 1G Heat-transfer plate 1H Heat-sink 1J Heat-sink 2 Base part 2a Surface 2b Back surface 3 Fin 4 Groove 5 Lid Groove 6 Cover plate 7 Heat medium tube 10 Block to be cut 10a Front surface 10b Back surface 21 Base plate 22 Fin 23 Block portion 24 Concave groove 25 Cover groove 26 Cover plate 27 Heat medium tube 31 Block to be cut F Rotating tool J Joint portion W Plasticization region

Claims (18)

On the surface of the block to be cut, a friction stirring step for performing friction stirring,
A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and
In the cutting step, the heat sink is cut in a state in which a tensile stress is applied to the back surface of the block to be cut by heat shrinkage after the friction stirring step.   The heat sink manufacturing method according to claim 1, further comprising a burr cutting step of cutting a burr generated by the friction stirring from a surface of the block to be cut. A method of manufacturing a heat sink using a block to be cut having a base plate and a block portion formed on the back surface of the base plate,
An exposed portion that is exposed around the block portion is formed on the back surface of the base plate,
A friction stirring step of performing friction stirring on the surface of the base plate;
A cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are laminated,
In the cutting step, the heat sink is subjected to heat shrinkage after the friction stirring step, and cutting is performed in a state where tensile stress is applied to the back surface of the block portion.   The heat sink manufacturing method according to claim 3, further comprising a burr cutting step of cutting a burr generated by the friction stirring from a surface of the base plate. A lid groove closing step of inserting a lid plate into the lid groove formed around the concave groove opening on the surface of the block to be cut;
A joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and
In the said cutting process, it cuts in the state in which the tensile stress acted on the back surface of the said to-be-cut block by the thermal contraction after the said joining process, The manufacturing method of the heat exchanger plate characterized by the above-mentioned. A lid plate insertion step of inserting the lid plate into the groove that opens on the surface of the block to be cut;
A joining step of performing frictional stirring along the abutting portion between the side wall of the concave groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and
In the said cutting process, it cuts in the state in which the tensile stress acted on the back surface of the said to-be-cut block by the thermal contraction after the said joining process, The manufacturing method of the heat exchanger plate characterized by the above-mentioned. A heat medium tube insertion step of inserting the heat medium tube into the concave groove formed in the bottom surface of the lid groove opening on the surface of the block to be cut;
A lid groove closing step of inserting a lid plate into the lid groove;
A joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and
In the said cutting process, it cuts in the state in which the tensile stress acted on the back surface of the said to-be-cut block by the thermal contraction after the said joining process, The manufacturing method of the heat exchanger plate characterized by the above-mentioned.   8. The method of manufacturing a heat transfer plate according to claim 7, wherein in the joining step, a plastic fluidized material fluidized by frictional heat is caused to flow into a gap formed around the heat medium pipe. . A heat medium pipe insertion step of inserting the heat medium pipe into the concave groove opened on the surface of the block to be cut;
A lid plate insertion step of inserting a lid plate into the concave groove;
A joining step of performing frictional stirring along the abutting portion between the side wall of the concave groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block to be cut with a multi-cutter in which a plurality of disk cutters are stacked, and
In the said cutting process, it cuts in the state in which the tensile stress acted on the back surface of the said to-be-cut block by the thermal contraction after the said joining process, The manufacturing method of the heat exchanger plate characterized by the above-mentioned.   In the joining step, the lid plate presses the upper portion of the heat medium pipe by a pressing force of a rotary tool that performs friction stirring, and at least the upper portion of the lid plate and the block to be cut are frictionally stirred. The manufacturing method of the heat exchanger plate of Claim 9.   The method for manufacturing a heat transfer plate according to any one of claims 5 to 10, further comprising a burr cutting step of cutting a burr generated by the friction stirring from a surface of the block to be cut. A method for producing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate,
An exposed portion that is exposed around the block portion is formed on the back surface of the base plate,
A lid groove closing step of inserting the lid plate into the lid groove formed around the concave groove opening on the surface of the base plate;
A joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are laminated,
In the cutting step, the heat transfer plate is cut in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step. A method for producing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate,
An exposed portion that is exposed around the block portion is formed on the back surface of the base plate,
A lid plate insertion step of inserting a lid plate into a concave groove opened on the surface of the base plate;
A joining step of performing frictional stirring along the abutting portion between the side wall of the concave groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are laminated,
In the cutting step, the heat transfer plate is cut in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step. A method for producing a heat transfer plate from a block to be cut having a base plate and a block portion formed on the back surface of the base plate,
An exposed portion that is exposed around the block portion is formed on the back surface of the base plate,
A heat medium tube insertion step of inserting a heat medium tube into a concave groove formed in a bottom surface of a lid groove opened on the surface of the base plate;
A lid groove closing step of inserting a lid plate into the lid groove;
A joining step of performing frictional stirring along the abutting portion between the side wall of the lid groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are laminated,
In the cutting step, the heat transfer plate is cut in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step.   The method for manufacturing a heat transfer plate according to claim 14, wherein, in the joining step, a plastic fluidized material fluidized by frictional heat is caused to flow into a gap formed around the heat medium pipe. . A method of manufacturing a heat transfer plate using a block to be cut having a base plate and a block portion formed on the back surface of the base plate,
An exposed portion that is exposed around the block portion is formed on the back surface of the base plate,
A heat medium tube insertion step of inserting a heat medium tube into the groove formed in the surface of the base plate;
A lid plate insertion step of inserting a lid plate into the concave groove;
A joining step of performing frictional stirring along the abutting portion between the side wall of the concave groove and the side surface of the lid plate;
A cutting step of forming a plurality of fins on the back side of the block portion with a multi-cutter in which a plurality of disk cutters are laminated,
In the cutting step, the heat transfer plate is cut in a state in which a tensile stress is applied to the back surface of the block portion by heat shrinkage after the joining step.   In the joining step, the lid plate presses the upper portion of the heat medium pipe by a pressing force of a rotary tool for friction stirring, and at least the upper portion of the lid plate and the base plate are frictionally stirred. The manufacturing method of the heat exchanger plate of Claim 16.   The heat transfer plate manufacturing method according to any one of claims 12 to 17, further comprising a burr cutting step of cutting a burr generated by the friction stirring from a surface of the base plate.

Images