CN114310199B

CN114310199B - Production method of radiating fin by friction stir welding

Info

Publication number: CN114310199B
Application number: CN202210136981.7A
Authority: CN
Inventors: 徐海根; 林云
Original assignee: Suzhou Huashengyuan Electromechanical Co ltd
Current assignee: Suzhou Huashengyuan Electromechanical Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-10-18
Anticipated expiration: 2042-02-15
Also published as: CN114310199A

Abstract

The application discloses this application relates to the technical field that the fin was made, especially relates to a production method with friction stir welding's fin, including following step: reducing the length, cutting the long raw material into a plurality of short sections; connecting, namely clamping the two short materials in parallel to enable the radiating fins on the two short materials to be arranged in parallel, and welding and fixing the connecting edges of the short material substrates by using a friction stir welding head; when two short members are juxtaposed, only the substrate of the short members is subjected to a clamping force. The present application has the following effects: the two short materials are welded and fixed through friction stir welding, and meanwhile, only the base material is clamped in the clamping process, acting force is not applied to the radiating fins, so that the radiating fins on the obtained finished radiating fins can be kept better, and the overall quality is improved.

Description

Production method of radiating fin by friction stir welding

Technical Field

The application relates to the technical field of manufacturing of radiating fins, in particular to a production method of a radiating fin by friction stir welding.

Background

The heat sink is widely used in various industrial fields, and a general heat sink is made of an aluminum material, and referring to fig. 1, the heat sink includes a base plate 11, a plurality of parallel heat sink fins 12 are formed on the base plate 11, and holes for fixing are formed on the base plate 11, and the heat sink is attached to a heat generating portion, so that the heat sink fins can better dissipate heat.

Generally, in the process of processing, due to the width limitation of raw materials, when a wider radiating fin is needed, two radiating fins need to be spliced and combined, and the radiating fin needs to be clamped and fixed in the combining process, so that the radiating fin is often damaged, and the quality of a formed product is influenced.

Disclosure of Invention

In order to reduce damage to the radiating fins when clamped and fixed, the application provides a production method of the radiating fins by friction stir welding.

The application provides a production method of a cooling fin welded by friction stir welding, which adopts the following technical scheme: a method for producing a heat sink by friction stir welding, comprising the steps of:

shortening, namely cutting the long raw material into a plurality of short materials;

connecting, namely clamping the two short materials in parallel to enable the radiating fins on the two short materials to be arranged in parallel, and welding and fixing the connecting edges of the short material substrates by using a friction stir welding head;

when two short members are juxtaposed, only the substrate of the short members is subjected to a clamping force.

Through adopting above-mentioned technical scheme, earlier cut the long raw and other materials, cut suitable length, stand side by side with two short-stocks again, carry out welded fastening with two short-stocks through friction stir welding, only do the centre gripping to the substrate at the in-process of centre gripping simultaneously, do not exert the effort to the fin, can make the radiating fin on the finished product fin that obtains keep better, whole quality improves.

Preferably, the short material is fixed by a welding fixture in the step of connection, the welding fixture comprises a welding base and clamping rods arranged on the welding base and used for being inserted between the radiating fins, and a pressing piece used for pressing the base plate to abut against the clamping rods is arranged on the welding base.

Through adopting above-mentioned technical scheme, at the spacing in-process of centre gripping, the supporting rod of one side will pass between the radiating fin to support tightly on the base plate, and the opposite side is fixed through compressing tightly the piece, and the supporting rod can play the effect of location, makes the connection limit can keep relatively fixed in the process, and the fixed power of centre gripping all exerts on the base plate, almost does not have the influence to the radiating fin.

Preferably, a step of leveling the end face is further provided between the step of shortening and the step of connecting, wherein the step of leveling the end face is performed by calibrating the radiating fins to be parallel to each other, and then cutting the end face of the radiating fin far away from the base plate to form a plane with the same height.

Through adopting above-mentioned technical scheme, the radiating fin alignment that will warp in transportation or course of working for interval between the radiating fin keeps unanimous, cuts the radiating fin after the alignment simultaneously, makes the fin keep unanimous apart from one side height of base plate, and product quality is good and unified.

Preferably, the heat dissipation fins are straightened through a calibrating clamp in the leveling end face in the step, the calibrating clamp comprises a calibrating base and a press roller assembly arranged on the calibrating base and used for being embedded between two adjacent heat dissipation fins, and a cutting knife used for cutting one side, far away from the base plate, of each heat dissipation fin is arranged on the calibrating base.

Through adopting above-mentioned technical scheme, before welding for the short material passes through calibration anchor clamps, and the pressure roller assembly will exert the effort to radiating fin's both sides, thereby makes radiating fin become the state of perpendicular to base plate, and after the alignment, the cutting knife can cut radiating fin's the side of going up.

Preferably, the compression roller assembly comprises two frame plates which are parallel to the radiating fins and are arranged at intervals, and a compression roller which is rotatably connected to one side of each frame plate, wherein the frame plates are opposite to each other, and the compression roller is perpendicular to the calibration base.

Through adopting above-mentioned technical scheme, when calibration anchor clamps moved, two frame plates will enter into between two adjacent radiating fin, and the compression roller will contradict and carry out the alignment on radiating fin, and the direction of motion is from radiating fin's one end to the other end.

Preferably, the frame plate passes through the regulating block setting on the calibration base, the regulating block sets up at the interval on the calibration base, just the regulating block slides and connects on the calibration base, be provided with the first regulating part that is used for adjusting distance between each regulating block on the calibration base, be provided with on the calibration base and be used for adjusting two the second regulating part of distance between the frame plate.

Through adopting above-mentioned technical scheme, calibration fixture can adjust the distance between two frame plates and do the regulation according to the interval between the radiating fin of fin itself, still need be through first regulating part simultaneously for do the change between each regulating block, make calibration fixture can adapt to not unidimensional fin.

Preferably, the first adjusting part comprises two cross rods and two adjusting rods, each cross rod is a group, the middle of each cross rod is hinged, the two adjusting rods are respectively arranged on two sides of each cross rod, the adjusting rods penetrate through the end parts of the cross rods on the same side, the adjusting blocks are fixedly connected to hinged joints in the middle of the cross rods of each group, and the end parts of different cross rod groups adjacent to each other in the length direction of the adjusting rods are hinged.

Through adopting above-mentioned technical scheme for two are adjusted the pole and are close to, and the cross bar group will deform this moment, thereby make the regulating block along adjusting the position change of arranging on the pole, and the distance between each regulating block can keep unanimous simultaneously, thereby makes every compression roller subassembly can the not unidimensional fin of adaptation.

Preferably, two connect through two articulated arms between the frame plate, two the articulated arm is located respectively the both ends of frame plate, the second regulating part is including connecting the regulating frame on the regulating block, connecting in the sliding block of regulating frame, the regulating frame slides along the direction that is on a parallel with radiating fin and connects on the regulating block, and one of them frame plate fixed connection is in on the regulating block, another the frame plate inlays to be established in the regulating frame, work as when the regulating frame moves, inlay and establish in the regulating frame another frame plate will be close to or keep away from.

Through adopting above-mentioned technical scheme, when adjusting the distance between two frame plates, make the frame of adjusting move along the direction that is on a parallel with radiating fin through the sliding block, because the existence of hinge rod this moment, the frame plate that can move about will carry out the translation at the frame of adjusting to change the interval between two frame plates.

Preferably, the compression roller assemblies on two sides of each radiating fin are symmetrically arranged.

Through adopting above-mentioned technical scheme, the compression roller subassembly that the symmetry set up can keep the same packing force all the time in radiating fin's both sides to improve the precision of alignment.

Preferably, be provided with the regulation linkage piece on the calibration base, the regulation linkage piece along the direction of being on a parallel with the frame plate slide connect in the calibration base, the confession is seted up along length direction to the regulation linkage piece the holding elongated slot of the one end embedding of sliding block, threaded connection has the adjusting screw rod that is used for ordering about the regulation linkage piece to slide on the calibration base, adjusting screw rod's one end is rotated and is connected on the regulation linkage piece.

By adopting the technical scheme, when the distance between the two adjusting blocks is changed, the sliding block can relatively slide in the accommodating long groove and is suitable for adjustment; simultaneously when the interval between the adjusting frame board, can make the regulation linkage piece move through rotating the adjusting threaded rod, can make each sliding block simultaneous movement this moment.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the base plate is fixedly clamped through the matching of the clamping rods, acting force is not applied to the radiating fins, and the quality of the formed radiating fin is good after friction stir welding is carried out;

2. before welding, the radiating fins are completely straightened through the compression roller assembly, and meanwhile, the straightened radiating fins are cut to the same height, so that the clamping rods can be conveniently inserted and fixed;

3. the position of the shelves and the distance between the two shelves are adapted to the size of the heat sink by the first and second adjustment members.

Drawings

FIG. 1 is a schematic view of a heat sink configuration;

FIG. 2 is a schematic view of the connection of the alignment jig to the heat sink;

FIG. 3 is a partial schematic view of a calibration jig;

FIG. 4 is a bottom view with the alignment base hidden;

FIG. 5 is a schematic view of the construction of the roll assembly;

FIG. 6 is a schematic view showing the connection relationship between the welding jig and the heat sink;

fig. 7 is a partially exploded view of the welding fixture with the hold down hidden.

Description of the reference numerals: 11. a substrate; 12. a heat dissipating fin; 100. calibrating the base; 110. a compression roller assembly; 111. a frame plate; 112. a compression roller; 120. a cutting knife; 130. an adjustment groove; 131. a regulating block; 140. a first adjustment member; 141. a cross bar; 142. adjusting a rod; 143. a first block; 144. a reverse screw; 145. a second block; 150. a hinged lever; 160. a second adjusting member; 161. an adjusting frame; 162. a sliding block; 170. adjusting the linkage block; 171. adjusting the linkage groove; 172. the long accommodating groove; 173. adjusting the threaded rod; 200. welding the base; 210. a clamping rod; 211. a support block; 212. a support groove; 213. a limiting plate; 214. a limiting hook; 215. a limit screw; 220. a pressing member; 221. a pressing cylinder; 222. a compression plate; 223. a yielding groove.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a production method of a radiating fin welded by friction stir welding, which comprises the following steps:

the length of the long raw material is reduced to be 5m, the long raw material needs to be cut into short materials through an automatic blanking machine, the length of the short material is 400mm, the long raw material is compressed during cutting, the length needing to be cut is exposed, and the short material is cut through a cutter.

Leveling the end face afterwards, straightening radiating fin 12 through the calibration anchor clamps in this embodiment, fixing base plate 11 through anchor clamps for calibration anchor clamps and fin carry out relative motion, calibrate radiating fin 12 to the state that is parallel to each other earlier, cut the terminal surface that radiating fin 12 kept away from base plate 11 one side again, form the plane of same height.

Referring to fig. 2, the calibration jig in this embodiment includes a calibration base 100, a roller assembly 110 disposed on the calibration base 100 and configured to be inserted between two adjacent heat dissipation fins 12, and a cutting knife 120 configured to cut one side of the heat dissipation fin 12 away from the substrate 11 is disposed on the calibration base 100.

Referring to fig. 3, the pressing roller assembly 110 includes two frame plates 111 parallel to the heat dissipating fins 12 and spaced apart from each other, and a pressing roller 112 rotatably connected to opposite sides of the frame plates 111, wherein the pressing roller 112 is perpendicular to the calibration base 100. Two frame plates 111 are inserted between two heat dissipation fins 12, the pressing roller 112 will abut against the heat dissipation fins 12, and the pressing roller assemblies 110 on both sides of each heat dissipation fin 12 are symmetrically arranged, so that uniform pressing force on both sides of the heat dissipation fins 12 can be realized.

Referring to fig. 3 and 4, an adjusting groove 130 is formed in the calibration base 100 along a direction perpendicular to the heat dissipating fins 12, a plurality of adjusting blocks 131 are arranged in the adjusting groove 130 at intervals, and each adjusting block 131 corresponds to one of the pressing roller assemblies 110. The calibration base 100 is provided with a first adjusting member 140 for adjusting the distance between the adjusting blocks 131, the first adjusting member 140 includes cross bars 141 and adjusting rods 142, every two cross bars 141 form a group, the middle of each group of cross bars 141 is hinged in an X shape, each group of cross bars 141 corresponds to one adjusting block 131, and the adjusting blocks 131 are fixedly connected to the hinged point in the middle of each group of cross bars 141.

Referring to fig. 4 and 5, the two ends of the cross bar 141 are rotatably connected with first blocks 143, the end portions of different adjacent cross bar 141 groups are hinged to the same first block 143, two adjusting rods 142 are respectively located at two sides of each cross bar 141, the adjusting rods 142 pass through the end portions of the cross bars 141 at the same side, and in this embodiment, the adjusting rods 142 pass through the first blocks 143. One end of the adjusting rod 142 is provided with a second block 145, the calibrating base 100 is rotatably connected with a reverse screw rod 144, the second block 145 is sleeved on the reverse screw rod 144 and is in threaded connection with the reverse screw rod 144, the two second blocks 145 are respectively positioned on different spiral directions of the reverse screw rod 144, when the reverse screw rod 144 is rotated, the two adjusting rods 142 can be close to or far away from each other, and after the cross rod 141 rotates, the distance between each hinge point can be synchronously changed, namely, the position of each compression roller assembly 110 can be adjusted.

The two shelves 111 are connected by two hinge rods 150, the two hinge rods 150 are respectively located at two ends of the shelves 111, the hinge rods 150 and the shelves 111 form a parallelogram, and the calibration base 100 is provided with a second adjusting member 160 for adjusting the distance between the two shelves 111. The second adjusting member 160 includes an adjusting frame 161 connected to the adjusting block 131, and a sliding block 162 connected to the adjusting frame 161, the adjusting frame 161 is slidably connected to the adjusting block 131 in a direction parallel to the heat dissipating fins 12, one of the frame plates 111 is fixedly connected to the adjusting block 131, the other frame plate 111 is embedded in the adjusting frame 161, and when the adjusting frame 161 moves in the direction of the heat dissipating fins 12 through the sliding block 162, the frame plate 111 embedded in the adjusting frame 161 will be close to or far away from the other frame plate 111, thereby adapting the heat dissipating fins without gaps.

Referring to fig. 3 and 5, in order to facilitate adjustment, the calibration base 100 is provided with an adjustment linkage block 170, the calibration base 100 is provided with an adjustment linkage groove 171, the adjustment linkage block 170 is connected in the adjustment linkage groove 171 in a sliding manner in a direction parallel to the frame plate 111, meanwhile, the adjustment linkage block 170 is provided with an accommodating long groove 172 along the length direction, into which one end of the sliding block 162 is inserted, and when the distance between the adjustment blocks 131 changes, the sliding block 162 will synchronously slide in the accommodating long groove 172.

Meanwhile, the adjusting screw rod 173 for driving the adjusting linkage block 170 to slide is screwed on the calibration base 100, and one end of the adjusting screw rod 173 extends into the adjusting linkage groove 171 and is rotatably connected to the adjusting linkage block 170. When the adjusting screw rod 173 rotates, the adjusting linkage block 170 will be driven to slide, so that the adjusting frames 161 can move synchronously, and the adjusting amount of each roller assembly 110 can be kept consistent.

In this embodiment, the cutting knife 120 is located between the adjusting block 131 and the sliding block 162, the heat dissipation fins 12 are firstly aligned through the pressing roller assembly 110, then pass through the cutting knife 120, and finally pass through the sliding block 162, so that the distance between the heat dissipation fins 12 on the heat dissipation fins after the end surfaces are leveled is the same.

And then, connecting, referring to fig. 6 and 7, clamping the two short materials in parallel, arranging the radiating fins 12 on the two short materials in parallel, and welding and fixing the connecting edges of the short material substrates 11 by using a friction stir welding head. In the step of connection, the short materials are fixed through a welding fixture, in this example, the welding fixture includes a welding base 200 and a clamping rod 210 arranged on the welding base 200 and used for being inserted between the heat dissipation fins 12, the welding base 200 has a supporting block 211, one side of the supporting block 211 is provided with a supporting groove 212 for embedding the heat dissipation fins, the upper side of the supporting groove 212 penetrates through, the width of the supporting groove 212 is equal to the parallel width of the two short materials, and the clamping rod 210 is welded on the inner wall of the supporting groove 212 on the side far away from the opening in parallel.

Since the heat dissipating fins 12 are aligned, each of the clamping rods 210 can be inserted between the heat dissipating fins 12, and two short materials can be inserted into the supporting grooves 212, so that the clamping rods 210 are limited. Meanwhile, one end of the supporting block 211 is rotatably connected with a limiting plate 213, one end of the limiting plate 213 is rotatably connected to the supporting block 211, one end of the supporting block 211, which is far away from the limiting plate 213, is further rotatably connected with a limiting hook 214 which is used for hooking the free end of the limiting plate 213, two limiting screws 215 are horizontally arranged on the limiting plate 213, the limiting screws 215 are in threaded connection with the limiting plate 213, and the end part of the limiting screw is used for abutting against the substrate 11, in other embodiments, a protecting plate (not shown in the figures) can be further padded for protecting the substrate 11, the limiting screws 215 have a tendency of opening the limiting plate 213 in the abutting process, and the limiting hook 214 is hooked on the limiting plate 213 at the moment, so that the purpose of fixing the radiating fins on the supporting block 211 in the horizontal direction can be achieved.

Meanwhile, the welding base 200 is provided with a pressing member 220 for pressing the substrate 11 to abut against the clamping rod 210, the pressing member 220 includes pressing cylinders 221 and pressing plates 222, when the heat sink is placed in the supporting groove 212, the upper side of the substrate 11 is higher than the supporting block 211, the pressing cylinders 221 are symmetrically arranged on two sides of the supporting block 211, and thus, a group of pressing cylinders 221 is provided, two groups are arranged at an interval in the embodiment, one pressing plate 222 corresponds to a group of pressing cylinders 221, two ends of the pressing plate 222 are fixedly connected to piston rods of the pressing cylinders 221 on two sides, and when the piston rods of the pressing cylinders 221 contract, the pressing plates 222 abut against the substrate 11 on the clamping rod 210. Therefore, when clamping, only the substrate 11 of short material is applied with clamping fixing force, and the end of the heat dissipation fin 12 is suspended.

After the clamping and fixing, in order to facilitate the welding and fixing of the connecting edge of the short material substrate 11 by the stir welding head, the pressing plate 222 is provided with a receding groove 223 exposed to the connecting edge, so that the stir welding head can completely weld the connecting edge.

And then, drilling and tapping the substrate 11 through a CNC machining plane, removing burrs after machining, and finally, fully inspecting and packaging.

The embodiments of the present invention are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A production method of a radiating fin welded by friction stir welding is characterized in that: the method comprises the following steps:

connecting, namely clamping the two short materials in parallel to enable the radiating fins (12) on the two short materials to be arranged in parallel, and welding and fixing the connecting edge of the short material substrate (11) by using a friction stir welding head;

when two short materials are arranged in parallel, only the clamping fixing force is applied to the substrate (11) of the short material;

in the step of connection, the short material is fixed through a welding fixture, the welding fixture comprises a welding base (200) and clamping rods (210) which are arranged on the welding base (200) and are used for being inserted between the radiating fins (12), and a pressing piece (220) which is used for pressing the base plate (11) to be tightly pressed on the clamping rods (210) is arranged on the welding base (200); a step of leveling the end face is further arranged between the step of shortening and the step of connecting, wherein in the step of leveling the end face, the radiating fins (12) are calibrated to be in a mutually parallel state, and then the end face of one side, far away from the base plate (11), of the radiating fin (12) is cut to form a plane with the same height; straightening the radiating fins (12) through a calibrating clamp in the leveling end face, wherein the calibrating clamp comprises a calibrating base (100) and a press roll assembly (110) which is arranged on the calibrating base (100) and is used for being embedded between two adjacent radiating fins (12), and a cutting knife (120) which is used for cutting one side, far away from the base plate (11), of each radiating fin (12) is arranged on the calibrating base (100); the compression roller assembly (110) comprises two frame plates (111) which are parallel to the radiating fins (12) and are arranged at intervals, and a compression roller (112) which is rotatably connected to the opposite sides of the frame plates (111), wherein the compression roller (112) is perpendicular to the calibration base (100); frame plate (111) are in through regulating block (131) setting on calibration base (100), regulating block (131) interval setting on calibration base (100), just regulating block (131) slide to be connected on calibration base (100), be provided with on calibration base (100) and be used for adjusting first regulating part (140) of distance between each regulating block (131), be provided with on calibration base (100) and be used for adjusting two second regulating part (160) of distance between frame plate (111).

2. A method of producing a friction stir welded fin according to claim 1 wherein: the first adjusting piece (140) comprises cross rods (141) and adjusting rods (142), every two cross rods (141) are in one group, the middle of each group of cross rods (141) is hinged, the adjusting rods (142) are provided with two groups and are respectively positioned on two sides of each group of cross rods (141), the adjusting rods (142) penetrate through the end portions of the cross rods (141) on the same side, the adjusting blocks (131) are fixedly connected to hinged joints in the middle of each group of cross rods (141), and the end portions of different groups of cross rods (141) adjacent to each other in the length direction of the adjusting rods (142) are hinged.

3. A method of producing a friction stir welded heat sink as claimed in claim 2, wherein: two connect through two articulated rod (150) between frame plate (111), two articulated rod (150) are located respectively the both ends of frame plate (111), second regulating part (160) including connect regulation frame (161) on regulating block (131), connect in the sliding block (162) of regulating frame (161), adjust frame (161) along the direction sliding connection that is on a parallel with radiating fin (12) on regulating block (131), one of them frame plate (111) fixed connection be in on regulating block (131), another frame plate (111) are inlayed and are established in regulating frame (161), work as when regulating frame (161) move, inlay and establish in regulating frame (161) frame plate (111) will be close to or keep away from another frame plate (111).

4. A method of producing a friction stir welded heat sink as claimed in claim 3, wherein: the compression roller assemblies (110) on two sides of each heat dissipation fin (12) are symmetrically arranged.

5. A method of producing a friction stir welded heat sink as claimed in claim 3, wherein: be provided with on calibration base (100) and adjust linkage block (170), adjust linkage block (170) along the direction of being on a parallel with frame plate (111) slide connect in calibration base (100), adjust linkage block (170) along length direction offer the confession the holding elongated slot (172) of the one end embedding of sliding block (162), threaded connection has adjusting threaded rod (173) that is used for driving adjusting linkage block (170) to slide on calibration base (100), the one end of adjusting threaded rod (173) is rotated and is connected adjust linkage block (170) on.