WO2014083609A1 - 整流装置の製造方法及び整流装置 - Google Patents
整流装置の製造方法及び整流装置 Download PDFInfo
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- WO2014083609A1 WO2014083609A1 PCT/JP2012/080593 JP2012080593W WO2014083609A1 WO 2014083609 A1 WO2014083609 A1 WO 2014083609A1 JP 2012080593 W JP2012080593 W JP 2012080593W WO 2014083609 A1 WO2014083609 A1 WO 2014083609A1
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- press
- heat sink
- rectifying element
- fitting
- hole
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- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 15
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4871—Bases, plates or heatsinks
- H01L21/4882—Assembly of heatsink parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/40—Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
- H01L23/4093—Snap-on arrangements, e.g. clips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/10—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers
- H01L25/11—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00
- H01L25/115—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H01L29/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- the present invention relates to a rectifier manufacturing method and a rectifier including a rectifying element that is press-fitted and held in a heat radiating heat sink. It is suitable for application to a generator.
- the outer diameter of the cylindrical heat sink of the rectifying element is set to be the heat radiating heat sink so that the rectifying element does not fall off from the heat radiating heat sink after press fitting.
- the press-fitting allowance is provided to be larger than the inner diameter of the press-fitting hole formed in.
- the inner diameter of the press-fitting hole is gradually reduced in the press-fitting direction (from one side to the other), and the (cylindrical or cylindrical) heat sink of the diode is deformed obliquely (conically) along the inner peripheral surface of the press-fitting hole.
- Patent Document 1 FIG. 3
- a press-fitting rod having a flat tip surface is press-fitted with a load evenly applied to the pressing surface.
- the tip surface of the press-fitting jig is a spherical concave surface, and is mainly brought into contact with the outer peripheral portion of the pressing surface to suppress deformation of the rectifying element.
- the taper of the diode receiving side press-fitting hole is 0.2 to 2.5 degrees, preferably 0.3 to 2 degrees, so that the diode is joined without exceeding the maximum allowable pressure input (Patent Document 2 and FIG. 2).
- the diode outer peripheral knurl is considerably deformed at a large depth on the small diameter side of the diode receiving side press-fitting hole.
- the press-fitting process is controlled by considering the offset degree and the pressing force.
- the inner peripheral surface of the press-fitting hole of the radiating fin is tapered so that the inner diameter on the press-fitting start side is larger than the inner diameter on the counter-pressing start side (Patent Documents 3 and 5).
- the inner diameter of the press-fitting hole of the radiating fin is constant, and the outer diameter of the outer peripheral surface of the rectifying element subjected to knurling is configured to be smaller on the driving start side than on the counter driving side (Patent Documents 3 and 3). This prevents a decrease in heat dissipation due to a decrease in contact area due to galling on the press-fitting start side and a decrease in thermal fatigue life of the element.
- the radial height of the knurled large-diameter convex portion is made lower on the side opposite to the driving side than the driving start side, and the large-diameter convex portion is formed at the time of driving (start). In this way, the heat sink fin is driven well while being deformed.
- the receiving hole is formed by a punching die formed on an aluminum plate having a thickness of about 6 mm, and a diode is press-fitted.
- the contact range between the diode and the aluminum plate is relatively small (Patent Document 4, FIG. 6).
- the punched member can be recycled if it is normal.
- Patent Document 5 the press-fitting member and the press-fitting member are sandwiched between the upper presser part and the lower presser part, and the lower presser part is brought into contact with the press-fitting member from below to raise the press-fitting member.
- a method of press-fitting into a member is shown.
- the upper pressing portion is provided with a centering pin whose outer peripheral surface is tapered, and the centering pin is engaged with the press-fitting hole of the press-fitted member.
- Japanese Patent No. 3675767 (FIG. 3) German Patent Invention DE 10 2006 019 315A1 specification (Fig. 2) Japanese Patent No. 4626665 (FIGS. 3 and 5) US Patent No. US 6,476,527B2 (FIG. 6) Japanese Patent No. 4122907
- the press-fit holes in many conventional examples have a desired shape obtained by processing the inner peripheral edge thereof. This is because of the necessity of holding the rectifying element so as to withstand the vibration applied thereto, and the necessity of positional accuracy for the subsequent electrical connection. In processing, the material removed by cutting is wasted and the manufacturing process increases. For example, as the processing steps of the inner peripheral edge portion of the press-fitting hole, four steps of (a) processing with a cutter, (b) face removal processing, (c) processing fluid processing (cleaning), and (d) confirmation can be considered. In particular, in a model using twelve rectifying elements including one on the positive electrode side and one on the negative electrode side per generator, the number of man-hours is large. In addition, the processing liquid cannot be easily discarded, and energy is required for the processing, which is against the global environment protection such as CO 2 reduction in recent years.
- the hole cross section has a convex shape only at the center as shown in FIG. 6, for example, and the range is not suitable for holding and contacting. Always occurs. Since only a part of the base of the diode is in contact, the heat dissipation efficiency is low, and it cannot cope with the recent trend of higher efficiency and higher output. In addition, if a complicated shape such as a large number of fins for improving generator cooling performance is to be obtained with a punching die, each must be punched with a separate die, and the productivity is extremely inferior, making it difficult to employ.
- the present invention provides a rectifier manufacturing method and a rectifier that reduce the number of processing steps and cost. Moreover, the manufacturing method of the reliable rectifier which does not apply an excessive load to the semiconductor pellet of a rectifier is provided.
- the method of manufacturing a rectifier according to the present invention includes a rectifying element having a cylindrical heat sink and mounted with a semiconductor pellet for converting an alternating current into a direct current into a press-fitting hole of a heat radiating heat sink, and the shaft of the rectifying element and the press-fitting hole.
- a load receiving jig, and the shaft of the rectifying element of the insertion guide is aligned with the shaft of the press-fitting hole of the heat sink, and the press-fitting head is moved to the heat sink.
- the heat-dissipating heat sink is sandwiched between the press-fitting head and the insertion guide, and the protruding portion of the load receiving jig is opposed to the cylindrical heat sink of the rectifying element in the through hole of the insertion guide.
- the head is pressed around the press-fitting hole of the heat radiating heat sink, the load applied to the cylindrical heat sink of the rectifying element is received by the protruding portion of the load receiving jig, and the rectifying element is press-fitted into the press-fitting hole of the heat radiating heat sink. Is.
- the load receiving jig has an annular receiving surface having a concave portion at a central portion at a tip portion of the protruding portion, and the rectifying element is formed on the annular receiving surface. The load applied to the outer peripheral edge portion of the cylindrical heat sink is received.
- the rectifying device of the present invention has a cylindrical heat sink, a lead at one end, and a rectifying element equipped with a semiconductor pellet for converting an alternating current into a direct current, and
- the inner peripheral surface of the press-fitting hole of the heat dissipation heat sink is a casting skin surface
- the outer peripheral part of the columnar heat sink of the rectifying element is A knurl is provided, and the height of the knurl from the valley of the knurl is 1 ⁇ 2 or more of the press-fit hole diameter tolerance of the heat sink.
- the rectifier manufacturing method includes the heat dissipation heat sink having the press-fitting hole whose inner peripheral surface is a cast skin surface, the press-fitting head is opposed to the heat-dissipation heat sink, and the heat dissipation heat sink is the press-fitting head.
- the protruding portion of the load receiving jig is opposed to the cylindrical heat sink of the rectifying element of the through hole of the insertion guide, and the press-fitting head presses the periphery of the press-fitting hole of the heat sink.
- the load receiving jig has an annular receiving surface having a concave portion at a center portion at a tip portion of the protruding portion, and the rectifying is performed on the annular receiving surface. Since the load applied to the outer peripheral edge of the columnar heat sink of the element is received, a reliable method of manufacturing a rectifier that does not apply an excessive load to the semiconductor pellet of the rectifier element can be obtained.
- an inner peripheral surface of the press-fitting hole of the heat radiating heat sink is a cast skin surface, and a knurl is provided on an outer peripheral portion of the columnar heat sink of the rectifying element, Since the height from the trough is 1/2 or more of the press-fit hole diameter tolerance of the heat dissipation heat sink, the cylindrical heat sink can be stably held in the press-fit hole formed by the casting skin surface, and the contact area is also stable. Thus, a highly reliable rectifier can be obtained, and the rectifier has a reduced number of processing steps and cost.
- FIG. 5 is an assembly schematic diagram in the exploded perspective view of the main part of FIG. 4.
- FIG. 5 is an assembly schematic diagram in the exploded perspective view of the main part of FIG. 4.
- FIG. 6 is a process cross-sectional view illustrating the assembly of the rectifying element to the heat dissipation heat sink in the first embodiment.
- FIG. 2 is a schematic diagram for explaining the relationship between a knurl of a cylindrical heat sink of the rectifying element and a press-fitting hole of the heat sink in Embodiment 1, and a schematic cross-sectional view perpendicular to the axis.
- FIG. 3 is a schematic diagram for explaining a relationship between a knurl of a cylindrical heat sink of the rectifying element and a press-fitting hole of the heat radiating heat sink in the first embodiment, and is a cross-sectional view parallel to the axis.
- FIG. 3 is a schematic diagram illustrating details of a knurl portion of a cylindrical heat sink in the first embodiment.
- FIG. 1 is a cross-sectional view showing a vehicular AC generator to which a rectifier according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a rear view showing a mounted state of the rectifier in the vehicular AC generator. Indicates the removed state.
- FIG. 3 is an exploded perspective view of the rectifier of FIG.
- the vehicle alternator 1 in FIG. 1 includes a casing 4 made of a substantially bowl-shaped aluminum front bracket 2 and rear bracket 3.
- the vehicle alternator 1 includes a shaft 6 rotatably supported by a casing 4 via a pair of bearings 5, and a pulley 7 fixed to an end of the shaft 6 extending to the front side of the casing 4.
- the pair of slip rings 15 that are fixed to the stator 12 and the extending portion of the shaft 6 that extends to the rear side of the casing 4 and supplies current to the rotor 8, and slide on the surface of each slip ring 15.
- a pair of brushes 16 and a brush holder 17 that accommodates these brushes 16 are provided.
- the vehicle alternator 1 is attached to a heat sink 18 disposed on the outer diameter side of the brush holder 17, a voltage adjusting device 19 that adjusts the magnitude of the AC voltage generated in the stator 12, a battery, and the like.
- a protective cover 25 attached to the rear bracket 3 so as to cover the brush holder 17, the voltage adjusting device 19, and the rectifying device 21.
- the rotor 8 is a Landel-type rotor, and is provided with a field winding 9 that generates a magnetic flux when an excitation current is passed, and a pole core 10 that is provided so as to cover the field winding 9 and forms a magnetic pole by the magnetic flux. It has.
- the stator 12 is wound around a cylindrical stator iron core 13 and the stator iron core 13, and an AC electromotive force is induced by a change in magnetic flux from the field winding 9 as the rotor 8 rotates. And a stator winding 14.
- the stator 12 is disposed so as to surround the rotor 8 with the stator iron core 13 sandwiched between the opening ends of the front bracket 2 and the rear bracket 3 from both axial ends.
- the rectifier 21 (FIGS. 2 and 3) includes a positive heat sink 22 on which a plurality of positive rectifier elements 22a are mounted, a negative heat sink 23 on which a plurality of negative rectifier elements 23a are mounted, and a circuit board. 24.
- the circuit board 24 is sandwiched between the positive-side heat sink 22 and the negative-side heat sink 23, and is configured in a substantially C shape in the axial direction.
- the positive side rectifying element 22a and the negative side rectifying element 23a are connected via the circuit board 24 so as to constitute a predetermined bridge circuit. At this time, as shown in the exploded view of FIG.
- the positive side heat sink 22, the circuit board 24, and the negative side heat sink 23 are laminated around the shaft 6 with the leads 28 of the rectifying elements 22 a and 23 a extending long.
- the lead 28 is electrically connected by welding, caulking, or the like at the distal end portion thereof.
- the rectifying device 21 configured as described above is arranged in a fan shape centered on the shaft 6 on a plane orthogonal to the axis of the shaft 6 on the outer peripheral side of the slip ring 15, and is outside the rear bracket 3 by screws 40. Fastened to the end face. Then, the lead wire 14a (FIG. 1) of the stator winding 14 is drawn from the rear bracket 3 and connected to the terminal of the circuit board 24, and the rectifier 21 and the stator winding 14 are electrically connected.
- FIG. 4 is an exploded perspective view of the main part around the rectifying element of the rectifying device of FIG.
- the heat sinks 22 and 23 of the rectifier are press-fitted with respective cylindrical heat sinks 27 (described later) of the rectifier elements 22a (23a), as partially shown in the sectional view of FIG.
- This is a cast part comprising a flat plate portion (flat plate portion) 22b (23b) and a plurality of fins 22c (23c) extending integrally from the flat plate portion.
- the rectifying element 22a (23a) has a cylindrical heat sink 27 at one end, an electrical lead (lead wire) at the other end, and converts alternating current into direct current within the outer peripheral edge. Semiconductor pellets are mounted.
- FIG. 5 is a cross-sectional view of an example of a rectifying element that can be applied to the first embodiment.
- the columnar heat sink 27 has a knurl 27b (FIG. 8) on the outer peripheral portion, and the outer peripheral edge portion 27a on the bottom surface is formed in an annular plane.
- the annular flat surface of the outer peripheral edge portion 27a is a portion with which an annular receiving surface of a load receiving jig 101 (described later) comes into contact.
- the upper outer peripheral edge 27c is also formed in an annular plane.
- a concave portion 27d is formed in the upper half of the central portion away from the outer peripheral edge in the vertical direction, and the semiconductor pellet 31 is mounted in the concave portion 27d.
- the semiconductor pellet 31 is fixedly connected to the bottom of the recess 27 d of the cylindrical heat sink 27 with a solder layer 32, and fixedly connected to the lead 28 with a solder layer 33.
- Reference numeral 34 denotes a protective layer made of resin or silicon rubber to protect the semiconductor pellet 31.
- the flat plate portion 22b (23b) has an axial dimension L sufficient for holding the rectifying element 22a (23a) to be press-fitted and conducting heat with the cylindrical heat sink 27 of the rectifying element.
- a plurality of fins 22c (23c) extend in the axial direction from at least one end face of the flat plate portion 22b (23b), have a dimension larger than the axial dimension L, are provided for heat dissipation, and a plurality are arranged at a predetermined pitch in the circumferential direction.
- the A rectifying element 22a (23a) is mounted in each of the plurality of press-fit holes 26 provided in the flat plate portion 22b (23b) so that the centers of the cylindrical heat sink 27, the lead 28, and the press-fit holes 26 are aligned.
- the press-fit holes 26 are not processed, and the flat plate portions 22b (23b) and the fins 22c (23c) are basically commercialized in a shape obtained by a casting mold while the cast skin surface remains unchanged.
- FIG. 6 is an assembly schematic diagram in an exploded perspective view of the main part around the rectifying element shown in FIG.
- FIG. 7 is a process cross-sectional view illustrating the assembly of the rectifying element to the heat dissipation heat sink in the first embodiment.
- the outer peripheral edge portion 27a of the bottom surface of the cylindrical heat sink 27 is received from below by the annular receiving surface 101a of the load receiving jig 101 and the non-insertion of the press-fit hole 26 through which the lead 28 is penetrated.
- the flat plate portion 22b is pushed downward by the press-fitting jig from the opposite surface side ("press-fit operation side" in FIG. 6).
- the press-fitting head 102a of the press-fitting jig is a cylindrical body having, for example, a cylindrical hollow hole so as not to buffer the lead 28.
- the press-fitting head press-fitting marks 30 having a ring shape and a width W are left on the flat plate portion 22b on the press-fitting operation side.
- the assembly process will be described with reference to FIGS. FIG. 7A:
- the rectifying element 22a is held by the through hole 103a of the insertion guide 103 with the cylindrical heat sink 27 (the outer peripheral edge 27a in FIG. 5) side as the bottom, and the lead 28 of the rectifying element 22a is press-fitted.
- the rectifying element 22a is guided so that the axis of the rectifying element 22a is aligned with the axis of the press-fitting hole 26 of the opposing heat radiating heat sink 22, and the flat plate portion 22b of the radiating heat sink 22 is placed on the insertion guide 103. To place.
- the load receiving jig 101 is disposed below, and the press-fitting head 102a is disposed on the upper side so that the respective axes are opposed to the axis of the rectifying element 22a.
- FIG. 7B The press-fitting head 102 a is lowered, the heat radiation heat sink 22 is sandwiched between the insertion guide 103, and the heat radiation heat sink 22 is fixed at a predetermined position on the insertion guide 103. At this time, the cylindrical hollow hole of the press-fitting head 102a faces the press-fitting hole 26 of the heat dissipation heat sink 22, and the lead 28 of the rectifying element 22a protrudes into the cylindrical hollow hole.
- FIG. 7C The insertion guide 103, the flat plate portion 22b, and the press-fitting head 102a in a state where the rectifying element 22a is guided are lowered integrally, and the outer peripheral edge portion 27a on the bottom surface of the cylindrical heat sink 27 is moved to the circle of the load receiving jig 101. Opposing and abutting against the annular receiving surface 101a.
- FIG. 7D Until the bottom surface of the insertion guide 103 comes into contact with the axial positioning surface 101b of the shoulder portion of the load receiving jig 101, the press-fitting hole 26 of the flat plate portion 22b is formed on the annular surface at the lower end of the press-fitting head 102a.
- the flat plate portion 22b and the insertion guide 103 are pressed and loaded. At this time, the load applied to the outer peripheral edge portion 27 a of the bottom surface of the cylindrical heat sink 27 is received by the annular receiving surface 101 a of the load receiving jig 101. As a result, the rectifying element 22 a is press-fitted into the press-fitting hole 26.
- the insertion guide 103 suppresses the inclination of the rectifying element 22a, and oblique press-fitting is avoided.
- the used load receiving jig 101 has a ring-shaped receiving surface 101a having a protruding portion formed at one end and a concave portion at the center at the tip of the protruding portion.
- An annular receiving surface 101a of the load receiving jig 101 is an annular plane.
- the annular receiving surface 101 a having this annular plane receives a load applied to the outer peripheral edge portion 27 a of the bottom surface of the cylindrical heat sink 27.
- An axial positioning surface 101b is provided on the shoulder portion of the projecting portion having the annular receiving surface 101a, and the distance between the annular receiving surface 101a and the axial positioning surface 101b is the insertion guide shaft length, the heat sink heat sink plane portion axis.
- the rectifying element 22a is set to a desired depth in the press-fitting hole 26 of the heat sink 22 by pressing until the bottom surface of the insertion guide 103 comes into contact with the axial positioning surface 101b. Press fit.
- the rectifying element 22a is held by the through hole 103a of the insertion guide 103 with the cylindrical heat sink 27 (the outer peripheral edge 27a in FIG. 5) side as the bottom side.
- the rectifying element 22a may be held by the through-hole 103a of 103, with the lead 28 disposed below and the outer peripheral edge 27c (FIG. 5) side of the cylindrical heat sink 27 facing the bottom.
- a cylindrical hollow hole is formed in the shaft part of the load receiving jig 101 having a protruding part formed at one end so that the lead 28 of the rectifying element 22a protrudes into the cylindrical hollow hole.
- the load applied to the outer peripheral edge portion 27c of the cylindrical heat sink 27 is received by the annular receiving surface 101a of the load receiving jig 101.
- the rectifying element 22a press-fitted into the heat sink 22 by the assembly process described above can ensure the positional accuracy required for connection with an insert terminal (not shown) of the circuit board 24.
- the tip of the press-fitting head 102a is a flat annular surface, and since the press-fitting hole is not pressed from above with a tapered outer peripheral slope like the centering pin shown in Patent Document 5, the press-fitting hole does not tilt left and right. The verticality of the press-fit hole can be secured.
- the heat sink 22 is sandwiched between the press-fitting head 102a and the insertion guide 103 from above and below and moved to the press-fitting process, the heat sink 22 is not likely to be deformed even with a press-fit load reaching 10000 N (1000 kgf).
- the upper surface of the press-fit member is not necessarily pressed by a flat surface, and there is a high possibility that the centering pin will sunk into the hole or the press-fit member is bent, and reliability cannot be ensured.
- the flat insertion guide 103 (perpendicular to the axis) and the axial direction of the load receiving jig 101 are made parallel to the flat plate portion 22b of the heat sink 22 having a plane perpendicular to the press-fitting hole 26.
- the tip height (relative height) of the lead 28 of the rectifying element 22a is stabilized, and the subsequent electrical connection lead Bonding defects are suppressed.
- the press-in depth can be easily controlled.
- the accuracy of the press-fitting hole 26 used in the above (casting surface) is lower than that by processing and higher than that by punching. That is, it does not require energy during processing, and can be provided with a hole with moderate accuracy by a complex multiple fin integrated heat sink.
- FIG. 8 is a schematic diagram for explaining the relationship between the knurl 27b of the cylindrical heat sink 27 of the rectifying element 22a and the press-fitting hole 26 of the heat dissipation heat sink 22 in the first embodiment, and is a schematic cross-sectional view perpendicular to the axis.
- FIG. 9 is a schematic view for explaining the relationship between the knurl 27b of the cylindrical heat sink 27 of the rectifying element 22a and the press-fitting hole 26 of the heat dissipation heat sink 22 in the first embodiment, and is a cross-sectional view parallel to the axis.
- C ⁇ b> 1 is the central axis of the press-fitting hole 26
- D is the inner diameter of the press-fitting hole 26
- h is the height from the valley of the knurl 27 b of the cylindrical heat sink 27.
- a knurl 27 b is provided on the outer peripheral portion of the cylindrical heat sink 27.
- the standard to be specified is a configuration corresponding to the minimum inner diameter dimension Dmin to the maximum inner diameter dimension Dmax of the inner diameter D including the gradient and tolerance due to the casting mold in the press-fitting hole 26 of the heat sink 22, and from the mountain valley of the knurle 27b.
- the cylindrical heat sink 27 is stably press-fitted into the press-fitting hole 26 formed by the casting surface.
- a highly reliable rectifier that can be held and has a stable contact area can be obtained.
- the diameter of the valley of the knurl 27b is smaller than the minimum inner diameter Dmin of the press-fit hole 26 of the heat sink 22, and the diameter of the peak is larger than the maximum inner diameter Dmax of the press-fit hole 26 of the heat sink 22. Yes. That is, the press-fitting is completed only by the deformation of the mountain of the nar 27b.
- Patent Document 1 the outer peripheral wall portion is not obliquely deformed as the diode heat sink itself is deformed, and the influence on the semiconductor pellet mounted on the rectifying element 22a is minimized.
- the taper configuration of Patent Documents 2 and 3 was intended to eliminate damage to the inner peripheral surface of the mounting hole due to squeezing at the press-fitting tip and the press-fitting start side. In addition, it is possible to reduce cracks and chips on the entire inner surface of the press-fitting hole 26 by making contact only with the knurl portion. Furthermore, since the knurles 27b themselves are not large and small in the axial direction, they can be manufactured by a normal manufacturing method, and it is only necessary to change the dimension designation.
- the knurls 27b applied to the outer peripheral portion are also arranged uniformly on the outer peripheral portion. It is preferable to avoid the risk of being pressed in with respect to the press-fitting hole 26.
- the distortion analysis result for the semiconductor pellet mounted on the rectifying element 22a was also good with almost no distortion.
- the knurl 27b shown in FIG. 8 is schematic and a detailed example is shown in FIG. 10, FIG. 10 is the schematic which shows the detail of the knurl 27b of the cylindrical heat sink 27 in Embodiment 1.
- FIG. n is the number of hills of Nar. It is preferable that the knurl portion is constituted by an arc. With this shape, both contact areas can be stably obtained, and variations and reductions in heat dissipation efficiency can be reduced.
- the height of the knurl to the standard defined above, it is possible to cope with a change in the dimensions of the environment on the press-fitting hole 26 side.
- the aluminum linear expansion coefficient of the heat sink 22 is 23.6 ⁇ 10 ⁇ 6 mm / K and the temperature change is 200 Kelvin
- a deformation of 23.6 ⁇ 10 ⁇ 6 ⁇ 200 4.72 ⁇ m is predicted.
- the holding force becomes unstable.
- a good result was obtained by setting the knurl height to a value of 4.72 ⁇ m ⁇ 20 times or more with respect to the deformation allowance as described above.
- Quality control as a product in which the cylindrical heat sink 27 precisely defined in the above-described standard is press-fitted into the press-fitting hole 26 of the heat radiation heat sink 22 having a draft by a casting mold is performed by the final press-fitting load in the step of FIG. Perform by detection. That is, the contact between the insertion guide 103 and the axial positioning surface 101 b of the load receiving jig 101 is detected by a press-fit load that press-fits the rectifying element 22 a into the press-fit hole 26 of the heat sink 22. Monitor the load during press-fitting.
- the distance between the annular receiving surface 101a of the load receiving jig 101 and the axial positioning surface 101b is set to a desired value in consideration of the insertion guide shaft length and the heat sink flat plate portion axial length. Only by load management, the heat radiation heat sink 22 in which the rectifying element press-fitting is completed at a certain axial position can be obtained.
- the press-fitting hole 26 side of the heat radiating heat sink 22 has no management or additional processing beyond the finished product.
- the control is mainly performed by the press-fitting load. Quality maintenance is easy.
- the projecting portion of the load receiving jig 101 is an annular receiving surface 101a having a concave portion at the center thereof, the range in which the semiconductor pellet is mounted (the outer surface where the annular receiving surface 101a of the columnar heat sink 27 of the rectifying element hits) The center part excluding the peripheral part) is not subjected to press-fitting load from the back side, and it does not affect the semiconductor pellets. it can. For this reason, there is no problem that “cass” is caught in the production line. Since the annular upper surface is flat, the annular receiving surface 101a causes non-uniform contact that is likely to occur at the time of contact with the outer peripheral portion of the pressing surface in the spherical concave press-fitting jig shown in Patent Document 1.
- the range of the annular receiving surface 101a of the load receiving jig 101 is only the central portion aiming at preventing tilting or only the outer diameter portion, distortion is inevitably applied to the cylindrical heat sink 27. It is desirable to receive a wide range from the outside diameter of the pellet to the full diameter of the press-fitting hole. Therefore, in the load receiving jig 101, the outer diameter of the annular receiving surface 101 a that presses the outer peripheral edge portion 27 a of the cylindrical heat sink 27 of the rectifying element 22 a is substantially the same as the inner diameter of the through hole of the insertion guide 103. It is not good.
- the processing process of the inner periphery of the press-fitting hole 26 becomes unnecessary, and energy required for processing can be saved for processing waste liquid that cannot be discarded as it is. It is not necessary to use the power required to recycle the punched out parts, making it more environmentally friendly.
- the present invention is not limited to this example.
- the upper half as a cylindrical component for tilt prevention and the outer peripheral edge 27a of the bottom surface of the columnar heat sink 27 are supported. It is possible to appropriately select a type in which the lower half of the supporting component is configured separately.
- the configuration around the press-fitting head 102a is not limited to the cylindrical shape as shown in the figure, and a centering mechanism for aligning the rectifying element inside the cylinder to improve the assembling accuracy is possible.
- the front end surface of the press-fitting head 102a is formed in an annular shape, the shape of other parts is not limited.
- the embodiments can be appropriately modified and omitted within the scope of the invention.
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Abstract
Description
1.圧入孔の内径を圧入方向に(一方側から他方側に)漸減する構成とし、圧入孔の内周面に沿って、ダイオードの(円筒又は円柱状)ヒートシンクを斜めに(円錐状に)変形させ(特許文献1,図3)、先端面が平面である圧入棒で押圧面に均等に荷重をかけて圧入する。あるいは、圧入治具の先端面を球状凹面とし、押圧面の外周部と主に接触させ、整流素子の変形を抑制する。
この発明は、前述の問題点に鑑み、加工工程数とコストを低減する整流装置の製造方法及び整流装置を提供するものである。また、整流素子の半導体ペレットに過度な荷重をかけない、信頼性のある整流装置の製造方法を提供するものである。
この発明の前記以外の目的、特徴、観点及び効果は、図面を参照する以下のこの発明の詳細な説明から、さらに明らかになるであろう。
図1はこの発明の実施の形態1による整流装置を適用した車両用交流発電機を示す断面図、図2はこの車両用交流発電機における整流装置の装着状態を示す背面図で、保護カバーを取り除いた状態を示す。図3は図1の整流装置の分解斜視図で、フィンを省いて示す。
図7(a);挿入ガイド103の貫通孔103aで整流素子22aを、円柱状ヒートシンク27(図5の外周縁部27a)側を底側にして保持し、整流素子22aのリード28を圧入孔26から突出させた状態で、対向する放熱ヒートシンク22の圧入孔26の軸に、整流素子22aの軸を合わせるように、整流素子22aをガイドし、放熱ヒートシンク22の平板部22bを挿入ガイド103上に配置する。下方に荷重受け治具101と、上方に圧入ヘッド102aを、それぞれの軸を、整流素子22aの軸に合わせて対向して配置する。
図7(b);圧入ヘッド102aを下降させ、挿入ガイド103との間で放熱ヒートシンク22を挟み、放熱ヒートシンク22を挿入ガイド103上の所定位置に固定する。このとき、圧入ヘッド102aの円柱状中空孔は放熱ヒートシンク22の圧入孔26に対向し、円柱状中空孔内に整流素子22aのリード28を突出させている。
図7(d);荷重受け治具101の肩部の軸方向位置決め面101bに挿入ガイド103の底面が当接するまで、圧入ヘッド102aの下端の円環状面で、平板部22bの圧入孔26の周囲から、平板部22bと挿入ガイド103を押圧し荷重する。このとき、荷重受け治具101の円環状受け面101aで、円柱状ヒートシンク27の底面の外周縁部27aにかかる荷重を受ける。これにより、整流素子22aが圧入孔26に圧入される。挿入ガイド103が整流素子22aの傾きを抑止し、斜め圧入が回避される。
なお、この発明は、その発明の範囲内において、実施の形態を適宜、変形、省略することが可能である。
Claims (12)
- 円柱状ヒートシンクを有し、交流電流を直流電流に変換する半導体ペレットを搭載した整流素子を、放熱ヒートシンクの圧入孔に、前記整流素子の軸と前記圧入孔の軸を合わせて圧入する整流装置の製造方法において、
内周面が鋳造肌面である前記圧入孔を有する前記放熱ヒートシンクと、
前記放熱ヒートシンクに荷重をかける圧入ヘッドと、
貫通孔を有しその貫通孔で前記整流素子を保持し、対向する前記放熱ヒートシンクの圧入孔の軸に、前記整流素子の軸を合わせるように、前記整流素子をガイドする挿入ガイドと、
突出部が一端部に形成された荷重受け治具とを備え、
前記放熱ヒートシンクの圧入孔の軸に、前記挿入ガイドの整流素子の軸を合わせると共に、前記圧入ヘッドを前記放熱ヒートシンクに対向させて、前記放熱ヒートシンクを前記圧入ヘッドと前記挿入ガイドで挟み、
前記挿入ガイドの貫通孔の前記整流素子の前記円柱状ヒートシンクに前記荷重受け治具の突出部を対向させ、
前記圧入ヘッドで前記放熱ヒートシンクの圧入孔の周囲を押圧し、前記荷重受け治具の突出部で前記整流素子の前記円柱状ヒートシンクにかかる荷重を受け、前記整流素子を前記放熱ヒートシンクの圧入孔に圧入する整流装置の製造方法。 - 前記荷重受け治具は、その突出部の先端部に、中央部に凹部がある円環状受け面を有し、前記円環状受け面で前記整流素子の前記円柱状ヒートシンクの外周縁部にかかる荷重を受ける請求項1記載の整流装置の製造方法。
- 前記荷重受け治具の前記円環状受け面は、円環状平面である請求項2記載の整流装置の製造方法。
- 前記荷重受け治具は、軸方向位置決め面を有し、前記円環状受け面と前記軸方向位置決め面間の距離が所望の値に設定され、
前記圧入ヘッドで前記放熱ヒートシンクの圧入孔の周囲を押圧し、前記荷重受け治具の円環状受け面で前記整流素子の前記円柱状ヒートシンクの外周縁部にかかる荷重を受け、前記挿入ガイドと前記荷重受け治具の軸方向位置決め面が当接するまで押圧して、前記整流素子を前記放熱ヒートシンクの圧入孔に圧入する請求項2又は請求項3記載の整流装置の製造方法。 - 前記整流素子は一端部に突出するリードを有し、
前記圧入ヘッドは、円柱状中空孔を有し、前記圧入ヘッドの円柱状中空孔を前記放熱ヒートシンクの圧入孔に対向させ、前記円柱状中空孔内に前記整流素子のリードを突出させて、前記放熱ヒートシンクに荷重をかけ、
前記圧入ヘッドで前記放熱ヒートシンクの圧入孔の周囲を押圧し、前記荷重受け治具の円環状受け面で前記整流素子の前記円柱状ヒートシンクの外周縁部にかかる荷重を受け、前記整流素子を前記放熱ヒートシンクの圧入孔に圧入する請求項2~請求項4のいずれか1項に記載の整流装置の製造方法。 - 前記荷重受け治具は、前記整流素子の前記円柱状ヒートシンクの外周縁部にかかる荷重を受ける前記円環状受け面の外径が、前記挿入ガイドの貫通孔の内径とほぼ同じである請求項2~請求項4のいずれか1項に記載の整流装置の製造方法。
- 前記挿入ガイドと前記荷重受け治具の軸方向位置決め面が当接したことを、前記整流素子を前記放熱ヒートシンクの圧入孔に圧入する圧入荷重で検出する請求項4記載の整流装置の製造方法。
- 前記整流素子は、その円柱状ヒートシンクの外周部にナールを設け、前記ナールの山の谷からの高さは、前記放熱ヒートシンクの圧入孔孔径公差の1/2以上であり、
前記ナールの谷部の最小外径は、前記放熱ヒートシンクの圧入孔の最小内径より小さく、前記ナールの山部の最大外径は前記放熱ヒートシンクの圧入孔の最大内径より大きい請求項1~請求項7のいずれか1項に記載の整流装置の製造方法。 - 円柱状ヒートシンクを有し、一端部にリードを有し、交流電流を直流電流に変換する半導体ペレットを搭載した整流素子が、放熱ヒートシンクの圧入孔に、前記整流素子の軸と前記圧入孔の軸を合わせて圧入された整流装置において、
前記放熱ヒートシンクの前記圧入孔の内周面が鋳造肌面であり、
前記整流素子の円柱状ヒートシンクの外周部には、ナールを設け、前記ナールの山の谷からの高さは、前記放熱ヒートシンクの圧入孔孔径公差の1/2以上である整流装置。 - 前記整流素子の円柱状ヒートシンクの外周部に設けられた前記ナールの谷部の最小外径は、前記放熱ヒートシンクの圧入孔の最小内径より小さく、前記ナールの山部の最大外径は前記放熱ヒートシンクの圧入孔の最大内径より大きい請求項9記載の整流装置。
- 前記整流素子の円柱状ヒートシンクの外周部に設けられた前記ナールは、ナール山部が円弧で構成されている請求項9又は請求項10記載の整流装置。
- 前記整流素子のリード側における前記放熱ヒートシンクの圧入孔の周囲には、圧入痕がある請求項9~請求項11のいずれか1項に記載の整流装置。
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JP2014549662A JP5972396B2 (ja) | 2012-11-27 | 2012-11-27 | 整流装置の製造方法 |
CN201280077181.7A CN104798295B (zh) | 2012-11-27 | 2012-11-27 | 整流装置的制造方法及整流装置 |
PCT/JP2012/080593 WO2014083609A1 (ja) | 2012-11-27 | 2012-11-27 | 整流装置の製造方法及び整流装置 |
US14/411,597 US10069432B2 (en) | 2012-11-27 | 2012-11-27 | Method for manufacturing rectifier and rectifier |
US16/046,535 US10263531B2 (en) | 2012-11-27 | 2018-07-26 | Method for manufacturing rectifier and rectifier |
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JP6433585B2 (ja) * | 2015-05-15 | 2018-12-05 | 三菱電機株式会社 | 車両用交流発電機 |
CN107996016B (zh) * | 2015-08-06 | 2020-01-17 | 三菱电机株式会社 | 车用旋转电机 |
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Also Published As
Publication number | Publication date |
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US10069432B2 (en) | 2018-09-04 |
EP2928058B1 (en) | 2018-03-21 |
CN104798295A (zh) | 2015-07-22 |
US20190036460A1 (en) | 2019-01-31 |
EP2928058A1 (en) | 2015-10-07 |
JP5972396B2 (ja) | 2016-08-17 |
US20150162846A1 (en) | 2015-06-11 |
US10263531B2 (en) | 2019-04-16 |
JPWO2014083609A1 (ja) | 2017-01-05 |
EP2928058A4 (en) | 2016-08-17 |
CN104798295B (zh) | 2017-10-31 |
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