CN109807455A - A kind of diffusion welding method of diffusion welding (DW) fixture and cupro-nickel composite sheet - Google Patents
A kind of diffusion welding method of diffusion welding (DW) fixture and cupro-nickel composite sheet Download PDFInfo
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- CN109807455A CN109807455A CN201910185411.5A CN201910185411A CN109807455A CN 109807455 A CN109807455 A CN 109807455A CN 201910185411 A CN201910185411 A CN 201910185411A CN 109807455 A CN109807455 A CN 109807455A
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Abstract
The invention discloses a kind of diffusion welding (DW) fixture and the diffusion welding methods of cupro-nickel composite sheet, are related to welding technology field.Diffusion welding (DW) fixture includes the first graphite pressing plate, the second graphite pressing plate and multiple locating bars.Multiple first positioning holes are offered on first graphite pressing plate, the upper surface of the first graphite pressing plate is for placing at least one copper-base piece and at least one nickel pole piece；Second graphite pressing plate is located at the top of the first graphite pressing plate, and copper-base piece and nickel pole piece are between the first graphite pressing plate and the second graphite pressing plate, offered on second graphite pressing plate with multiple first positioning holes multiple second location holes correspondingly, the second graphite pressing plate is under external force compressing copper-base piece and nickel pole piece；Multiple locating bars across corresponding first positioning hole and second location hole for being positioned.The diffusion welding (DW) clamp structure is simple, the rejection rate that can be effectively reduced in welding process, while can realize the Diffusion Welding of extensive cupro-nickel composite joint piece, and reusable rate is strong.
Description
Technical field
The present invention relates to welding technology fields, in particular to the expansion of a kind of diffusion welding (DW) fixture and cupro-nickel composite sheet
Dissipate welding method.
Background technique
Today's society, as the improvement of people's living standards, the ownership of automobile is also in cumulative year after year.Due to fuel vehicle band
The exhaust emissions problem come is a key factor of current environmental pollution.Therefore, the new energy such as electric car or hybrid electric vehicle
Source automobile comes into being, they represent a developing direction of future automobile.In electric car, core is exactly to make the most
For the power battery pack of power resources.Currently, the power battery of electric car be typically all using largely by it is tens of in addition on
Hundred section single lithium batteries form powerful lithium battery group by way of series and parallel, to meet the power demand of electric car.
For the series and parallel between single lithium battery battery core, usually it is attached using full nickel sheet or full copper sheet.Using full nickel sheet into
Row connection, it is at high cost although solderability is good；Be attached using full copper sheet, it is at low cost although conducting electricity very well, its with
Often there are problems that the welding is not firm between battery core pole.
In the prior art, cupro-nickel composite sheet is a kind of more common cell connector.When connection, by the welding in nickel sheet
Part and the anode or cathode of battery pack weld, and existing copper nickel compound piece has the drawback that: soldering reliability is not strong, welds
The defects of Cheng Zhong, rejection rate is too high, therefore, it is necessary to be improved.
Summary of the invention
The purpose of the present invention is to provide a kind of diffusion welding (DW) fixtures, and the diffusion welding (DW) clamp structure is simple, easy to use,
Assembly is simple, and the rejection rate that can be effectively reduced in welding process, while can realize the expansion of extensive cupro-nickel composite joint piece
Welding is dissipated, reusable rate is strong.
Another object of the present invention is to provide a kind of diffusion welding method of cupro-nickel composite sheet, the reliabilities of this method
By force, rejection rate is low in welding process.
The embodiment of the present invention is achieved in that
A kind of diffusion welding (DW) fixture, for clamping cupro-nickel composite sheet, comprising:
First graphite pressing plate offers multiple first positioning holes, the upper surface of the first graphite pressing plate on the first graphite pressing plate
For placing at least one copper-base piece and at least one nickel pole piece, and copper-base piece is located between nickel pole piece and the first graphite pressing plate；
Second graphite pressing plate, the second graphite pressing plate is located at the top of the first graphite pressing plate, and copper-base piece and nickel pole piece are located at
Between first graphite pressing plate and the second graphite pressing plate, offered on the second graphite pressing plate one-to-one with multiple first positioning holes
Multiple second location holes, the second graphite pressing plate is under external force compressing copper-base piece and nickel pole piece；
Multiple locating bars, a corresponding first positioning hole of locating bar and a second location hole, and locating bar is used for
It is positioned across corresponding first positioning hole and second location hole.
Further, in the preferred embodiment, multiple first positioning holes and multiple second location holes are in square
Shape array arrangement.
Further, in the preferred embodiment, first positioning hole and second location hole are circular hole, and first
The size of the diameter of phi 1 of location hole and second location hole is related with the size of the first graphite pressing plate and the second graphite pressing plate, and the
Diameter of phi 1=4~6mm of a positioning hole and second location hole.
Further, in the preferred embodiment, the size and copper of the first graphite pressing plate and the second graphite pressing plate
The size of nickel compound piece and the furnace chamber total height of diffusion welding (DW) are related.
Further, in the preferred embodiment, the length of the first graphite pressing plate and the second graphite pressing plate is
L1, the length of cupro-nickel composite sheet are L2, L1=L2+ (15~20) mm；
The width of first graphite pressing plate and the second graphite pressing plate is W1, and the width of cupro-nickel composite sheet is W2, W1=W2+
(15~20) mm；
The height of first graphite pressing plate and the second graphite pressing plate is H1, and furnace chamber total height is H2, the height of cupro-nickel composite sheet
Degree is H3, H1=H2/ ((H1+H3) × cupro-nickel composite sheet the piece number).
Further, in the preferred embodiment, locating bar is stainless steel round bar, and the height of locating bar is big
It is small to be determined according to by the total height of bit copper nickel compound piece and the first graphite pressing plate and the second graphite pressing plate, the diameter of locating bar
Size is determined according to the size of first positioning hole and second location hole.
Further, in the preferred embodiment, the height of locating bar is H4, and H4=(H1+H3) × cupro-nickel is multiple
Close piece the piece number+(1.5~2.5) mm；
The diameter of locating bar is Φ 2, Φ 2=Φ 1-0.2mm.
Further, in the preferred embodiment, it is provided between the first graphite pressing plate and the second graphite pressing plate
Multiple copper-base pieces and nickel pole piece, and the quantity of copper-base piece and nickel pole piece by the size of diffusion welding (DW) furnace chamber and the first graphite pressing plate,
The THICKNESS CALCULATION of second graphite pressing plate；
Wherein, 20~50 copper-base pieces and nickel pole piece are provided between the first graphite pressing plate and the second graphite pressing plate.
Further, in the preferred embodiment, copper-base on piece offers first through hole, offers on nickel pole piece
Second through-hole, first through hole is identical with the shape of the second through-hole, has the lug that extends to the second through-hole on nickel pole piece, and ought the
When one through-hole and opposite the second through-hole, the second graphite pressing plate and the first graphite pressing plate can be under external force by copper-base pieces and nickel pole
Piece compresses.
A kind of diffusion welding method of cupro-nickel composite sheet, comprising: utilize above-mentioned diffusion welding (DW) fixture by copper-base piece and nickel
Pole piece is welded after clamping.
The embodiment of the present invention at least have following advantages or the utility model has the advantages that
1, cupro-nickel composite joint piece Diffusion Welding device provided by the invention is matched by design and the scale of part to be welded
Fixture, and copper-base piece is assembled with nickel pole piece part to be welded with fixture, then the clamp fixture obtained assembled exists
It is diffused welding in Vacuum diffusion bonding furnace, the Diffusion Welding of extensive cupro-nickel composite joint piece can be realized.
2, cupro-nickel composite joint piece Diffusion Welding device provided by the invention, using high-density graphite plate matter as fixture,
When being diffused welding to cupro-nickel composite joint piece part to be welded, chemistry does not occur using graphite pressing plate and copper-base piece and nickel pole piece
The higher cupro-nickel composite joint piece of surface quality has can be obtained in the characteristic of reaction after welding.
3, cupro-nickel composite joint piece Diffusion Welding device provided by the invention, will make full use of the use space of furnace chamber, adopts
With stack, according to furnace chamber size and graphite plate THICKNESS CALCULATION, it is contemplated that a sleeve clamp answers 20~50 pieces of cupro-nickels of clamping after stacking
Close connection sheet.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the diffusion welding (DW) fixture that the embodiment of the present invention provides；
Fig. 2 is structural schematic diagram of the cupro-nickel composite sheet that provides of the embodiment of the present invention under the first visual angle；
Fig. 3 is structural schematic diagram of the cupro-nickel composite sheet that provides of the embodiment of the present invention under the second visual angle.
Icon: 100- diffusion welding (DW) fixture；101- copper-base piece；103- nickel pole piece；105- lug；107- the first graphite pressure
Plate；109- the second graphite pressing plate；111- first positioning hole；113- second location hole；115- locating bar；117- cupro-nickel composite sheet.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the embodiment of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
Either the invention product using when the orientation or positional relationship usually put, be merely for convenience of the description present invention and simplification retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and
It cannot be understood as indicating or implying relative importance.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be on or below second feature
Directly contacted including the first and second features, also may include the first and second features be not direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature second spy
Right above sign and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of first feature horizontal height
Less than second feature.
Fig. 1 is the structural schematic diagram of diffusion welding (DW) fixture 100 provided in this embodiment, and Fig. 2 is copper provided in this embodiment
Structural schematic diagram of the nickel compound piece 117 under the first visual angle；Fig. 3 is cupro-nickel composite sheet 117 provided in this embodiment in the second view
Structural schematic diagram under angle.It please refers to Fig.1 to Fig.3, a kind of diffusion welding (DW) fixture 100 is present embodiments provided, for clamping copper
Nickel compound piece 117, to be welded to cupro-nickel composite sheet 127.The diffusion welding (DW) fixture 100 include: the first graphite pressing plate 107,
Second graphite pressing plate 109 and multiple locating bars 115.
In detail, referring to Fig. 1 to Fig. 3, in the present embodiment, multiple are offered on the first graphite pressing plate 107
A positioning hole 111, the upper surface of the first graphite pressing plate 107 is for placing at least one copper-base piece 101 and at least one nickel pole piece
103, and copper-base piece 101 is located between nickel pole piece 103 and the first graphite pressing plate 107；Second graphite pressing plate 109 is located at the first graphite
The top of pressing plate 107, and copper-base piece 101 and nickel pole piece 103 be between the first graphite pressing plate 107 and the second graphite pressing plate 109,
It is offered on second graphite pressing plate 109 and the one-to-one multiple second location holes 113 of multiple first positioning holes 111, the second stone
Black pressing plate 109 is under external force compressing copper-base piece 101 and nickel pole piece 103；Multiple locating bars 115 are determined with multiple first
Position hole 111 and multiple second location holes 113 are arranged in a one-to-one correspondence, and locating bar 115 is used for across first positioning hole 111 and second
Location hole 113 is positioned.Cupro-nickel composite joint piece Diffusion Welding device provided by the invention, by designing the rule with part to be welded
The fixture that mould matches, and copper-base piece 101 is assembled with 103 part to be welded of nickel pole piece with fixture, then by assembly obtained
Good clamp fixture is diffused welding in Vacuum diffusion bonding furnace, and the diffusion welding (DW) of extensive cupro-nickel composite joint piece can be realized
It connects.Therefore, the diffusion welding (DW) is simple with 100 structure of fixture, easy to use, and assembly is simple, and can be effectively reduced in welding process
Rejection rate, while can realize the Diffusion Welding of extensive cupro-nickel composite joint piece, reusable rate is strong.
Alternatively, the first graphite pressing plate 107 and the second graphite pressing plate 109 are highdensity graphite material.
Graphite pressure is utilized when being diffused welding to cupro-nickel composite joint piece part to be welded using high-density graphite plate matter as fixture
The characteristic that plate and copper-base piece 101 and nickel pole piece 103 do not chemically react, can be obtained the higher cupro-nickel of surface quality after welding
Composite joint piece.
Referring to Fig. 1 to Fig. 3, in the present embodiment, the quantity of first positioning hole 111 and second location hole 113 is equal
It is four, the quantity of locating bar 115 is four.During four first positioning holes 111 and second location hole 113 be with part to be welded
The heart, it is symmetrical.Locating bar 115 can be positioning bolt.The quantity of locating bar 115 can also be selected according to demand, and
Four are not limited only to, the embodiment of the present invention is without limitation.
Referring to Fig. 1 to Fig. 3, in the present embodiment, first positioning hole 111 and second location hole 113 are circular hole,
And the size of the diameter of phi 1 of first positioning hole 111 and second location hole 113 and the first graphite pressing plate 107 and the second graphite pressing plate
109 size is related, and diameter of phi 1=4~6mm of first positioning hole 111 and second location hole 113.
Also, the first graphite pressing plate 107 and the second graphite pressing plate 109 are rectangular-shape, the first graphite pressing plate 107 and
The size of two graphite pressing plates 109 is related to the size of cupro-nickel composite sheet 117 and the furnace chamber total height of diffusion welding (DW).First graphite pressure
The length of plate 107 and the second graphite pressing plate 109 is L1, and the length of cupro-nickel composite sheet 117 is L2, L1=L2+ (15~20) mm；
The width of first graphite pressing plate 107 and the second graphite pressing plate 109 is W1, and the width of cupro-nickel composite sheet is W2, W1=W2+ (15
~20) mm；The height of first graphite pressing plate 107 and the second graphite pressing plate 109 is H1, and furnace chamber total height is H2, and cupro-nickel is compound
The height of piece 117 is H3, H1=H2/ (117 the piece number of (H1+H3) × cupro-nickel composite sheet).
Alternatively, in the present embodiment, locating bar 115 is stainless steel bar pole, and the height of locating bar 115
Size according to by the total height of bit copper nickel compound piece 117 and the first graphite pressing plate 107 and the second graphite pressing plate 109 determine,
The size of the diameter of locating bar 115 is determined according to the size of first positioning hole 111 and second location hole 113.The height of locating bar 115
Degree is H4, H4=(H1+H3) × 117 the piece number of cupro-nickel composite sheet+(1.5~2.5) mm；The diameter of locating bar 115 is Φ 2, Φ 2=
Φ1-0.2mm。
Still optionally further, multiple copper-base pieces 101 are provided between the first graphite pressing plate 107 and the second graphite pressing plate 109
With nickel pole piece 103, and the quantity of copper-base piece 101 and nickel pole piece 103 is by the size and the first graphite pressing plate of diffusion welding (DW) furnace chamber
107, the THICKNESS CALCULATION of the second graphite pressing plate 109；It is provided with 20 between first graphite pressing plate 107 and the second graphite pressing plate 109~
50 copper-base pieces 101 and nickel pole piece 103.It designs in this way, the use space of furnace chamber will be made full use of, using stack, according to furnace
Chamber size and graphite plate THICKNESS CALCULATION, it is contemplated that a sleeve clamp will clamp 20~50 pieces of cupro-nickel composite joint pieces after stacking, and improve folder
The practicability of tool.
Specifically, in the present embodiment, the total length of cupro-nickel composite joint piece be 157.65mm, width 115.34mm,
Its height is 0.95mm (wherein for copper-base piece 101 with a thickness of 0.8mm, nickel pole piece 103 is 0.15mm).According to by the compound company of bit copper nickel
The size of contact pin is configured, a length of 175mm of graphite pressing plate, width 135mm, a height of 5mm；The diameter of 4 positioning round orifice is big
Small is 6mm；According to shown in Fig. 1, the height of 4 positioning stainless steel bars is 7.5mm, diameter 5.8mm.
Referring to Fig. 1 to Fig. 3, in the present embodiment, first through hole is offered on copper-base piece 101, on nickel pole piece 103
The second through-hole is offered, first through hole and the second through-hole are circle, have the lug extended to the second through-hole on nickel pole piece 103
105, and when first through hole and opposite the second through-hole, the second graphite pressing plate 109 and the first graphite pressing plate 107 can be in external forces
It is lower to compress copper-base piece 101 and nickel pole piece 103.The rejection rate that can be effectively reduced in welding process is set in this way, is avoided the occurrence of
Mistake.
The embodiments of the present invention also provide a kind of diffusion welding method of cupro-nickel composite sheet 117, this method utilizes above-mentioned
Diffusion welding (DW) with fixture 100 clamp after welded.
In detail, this method comprises: being surface-treated to copper-base piece 101 and nickel pole piece 103 to be welded；By what is handled well
Copper-base piece 101 is placed in 107 top of the first graphite pressing plate of above-mentioned diffusion welding (DW) fixture 100；The nickel pole piece 103 handled well is put
It is placed in the top of copper-base piece 101, and makes the first through hole of copper-base piece 101 opposite with the second through-hole of nickel pole piece 103；It will positioning
After stick 115 is directed at first positioning hole 111 and second location hole 113, positioned；Second graphite pressing plate 109 is placed in nickel pole
The top of piece 103；Copper-base piece 101 and nickel pole piece 103 are welded as a whole.This method it is highly reliable, in welding process
Rejection rate is low.
In detail, this method includes S1: carrying out chemical treatment to the surface of part to be welded and removes oxidation film, first passes through cleaning
Medium is that the dilute hydrochloric acid of 10% solubility cleans, and scavenging period is 60 seconds, is 10% solubility using cleansing medium after water rinses
It is cleaned in sodium hydroxide solution, scavenging period is 60 seconds, and after water rinses again, copper-base piece 101 and nickel pole piece 103 are placed in wine
Ultrasonic cleaning 1min in essence, the part to be welded handled well after alcohol air-dries；
S2: by treated, part to be welded is assembled with fixture, is specifically included:
S21: the copper-base piece 101 handled well is placed in the positioning holes center of lower platen；
S22: the nickel pole piece 103 handled well is placed on the copper-base piece 101 on lower platen, copper-base piece 101 and nickel pole piece
103 through-hole is opposite；
S24: 4 locating bars 115 of fixture are placed in lower clamp plate positioning round orifice, the location hole and locating bar of top board
After 115 alignments, top board is placed in 103 top of nickel pole piece, the fixture tooling assembled；
Optionally, carrying out chemical treatment to the surface of part to be welded includes:
S11: the surface of part to be welded is successively cleaned with dilute hydrochloric acid, sodium hydroxide solution；
S12: simultaneously metallic luster is presented in the reaction product on removal part to be welded surface；
S13: again with the surface of washes of absolute alcohol part to be welded；
S14: the surface of part to be welded is dried up, the sample to be welded handled well.
It should also be noted that, can be incited somebody to action when needing to clamp multiple cupro-nickel composite joint pieces using diffusion welding (DW) fixture 100
Fixture, stainless steel plate, stainless steel bar surface are cleaned with alcohol and acetone, and cleaned lower platen is put on stainless steel plate
Side, is placed in 4 positioning round orifice centers of lower platen for processed copper-base piece 101, and 4 stainless steel bars are put in 4 and are determined
Between circle of position hole, the nickel pole piece 103 handled well is put in the surface of copper-base piece 101, copper-base piece 101 is logical with nickel pole piece 103
Hole is opposite, after the second graphite pressing plate 109 is directed at 4 stainless steel bars, top board is put in 103 top of nickel pole piece, completes one layer of copper
The clamping of nickel composite joint piece, then the fixture clamped is put in furnace together with stainless steel plate, it is compound to continue upper layer cupro-nickel
2 pieces of cupro-nickel composite joint pieces of pre-assembled can be completed in the clamping of connection sheet.
In conclusion a kind of diffusion welding (DW) that the embodiment of the present invention provides is simple with 100 structure of fixture, easy to use, dress
With rejection rate that is simple, and being effectively reduced in welding process, while it can realize the diffusion of extensive cupro-nickel composite joint piece
Welding, reusable rate are strong.The embodiment of the present invention provides a kind of diffusion welding method of cupro-nickel composite sheet 117, reliability
By force, rejection rate is low in welding process.
The foregoing is merely alternative embodiments of the invention, are not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of diffusion welding (DW) fixture, for clamping cupro-nickel composite sheet characterized by comprising
First graphite pressing plate, offers multiple first positioning holes on the first graphite pressing plate, the first graphite pressing plate it is upper
Surface is for placing at least one copper-base piece and at least one nickel pole piece, and the copper-base piece is located at the nickel pole piece and described the
Between one graphite pressing plate；
Second graphite pressing plate, the second graphite pressing plate are located at the top of the first graphite pressing plate, and the copper-base piece and institute
Nickel pole piece is stated between the first graphite pressing plate and the second graphite pressing plate, offered on the second graphite pressing plate with
Multiple second location holes, the second graphite pressing plate are used under external force to multiple first positioning holes correspondingly
The copper-base piece and the nickel pole piece compress；
Multiple locating bars, a corresponding first positioning hole of the locating bar and a second location hole, and institute
Locating bar is stated for being positioned across the corresponding first positioning hole and the second location hole.
2. diffusion welding (DW) fixture according to claim 1, it is characterised in that:
Multiple first positioning holes and the equal rectangular array arrangement of multiple second location holes.
3. diffusion welding (DW) fixture according to claim 1, it is characterised in that:
The first positioning hole and the second location hole are circular hole, and the first positioning hole and the second location hole
The size of diameter of phi 1 is related with the size of the first graphite pressing plate and the second graphite pressing plate, and the first positioning hole
With diameter of phi 1=4~6mm of the second location hole.
4. diffusion welding (DW) fixture according to claim 1, it is characterised in that:
The size and diffusion welding (DW) of the size of the first graphite pressing plate and the second graphite pressing plate and the copper-nickel composite sheet
Furnace chamber total height it is related.
5. diffusion welding (DW) fixture according to claim 4, it is characterised in that:
The length of the first graphite pressing plate and the second graphite pressing plate is L1, and the length of the copper-nickel composite sheet is L2,
L1=L2+ (15~20) mm；
The width of the first graphite pressing plate and the second graphite pressing plate is W1, and the width of the copper-nickel composite sheet is W2,
W1=W2+ (15~20) mm；
The height of the first graphite pressing plate and the second graphite pressing plate is H1, and the furnace chamber total height is H2, the copper
The height of nickel compound piece is H3, H1=H2/ ((H1+H3) × cupro-nickel composite sheet the piece number).
6. diffusion welding (DW) fixture according to claim 1, it is characterised in that:
The locating bar is stainless steel round bar, and the size of the height of the locating bar is according to by bit copper nickel compound piece and described
The total height of first graphite pressing plate and the second graphite pressing plate determines that the size of the diameter of the locating bar is according to described first
The size of location hole and the second location hole determines.
7. diffusion welding (DW) fixture according to claim 6, it is characterised in that:
The height of the locating bar is H4, H4=(H1+H3) × cupro-nickel composite sheet the piece number+(1.5~2.5) mm；
The diameter of the locating bar is Φ 2, Φ 2=Φ 1-0.2mm；
Wherein, Φ 1 is the diameter of the second location hole, and H3 is the height of the copper-nickel composite sheet, and H1 is first graphite
The height of pressing plate and the second graphite pressing plate.
8. diffusion welding (DW) fixture according to any one of claim 1 to 7, it is characterised in that:
Multiple copper-base pieces and the nickel pole piece are provided between the first graphite pressing plate and the second graphite pressing plate, and
The quantity of the copper-base piece and the nickel pole piece by diffusion welding (DW) furnace chamber size and the first graphite pressing plate, second stone
The THICKNESS CALCULATION of black pressing plate；
Wherein, 20~50 copper-base pieces and described are provided between the first graphite pressing plate and the second graphite pressing plate
Nickel pole piece.
9. diffusion welding (DW) fixture according to claim 1, it is characterised in that:
The copper-base on piece offers first through hole, offers the second through-hole on the nickel pole piece, the first through hole and described
Second shape of through holes is identical, has the lug that extends to second through-hole on the nickel pole piece, and when the first through hole with
When second through-hole is opposite, the second graphite pressing plate and the first graphite pressing plate can be under external force by the copper-bases
Piece and nickel pole piece compress.
10. a kind of diffusion welding method of cupro-nickel composite sheet characterized by comprising
After the copper-base piece and the nickel pole piece are clamped using diffusion welding (DW) fixture described in any one of any one of claims 1 to 99
It is welded.
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| CN201910185411.5A CN109807455A (en) | 2019-03-12 | 2019-03-12 | A kind of diffusion welding method of diffusion welding (DW) fixture and cupro-nickel composite sheet |
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| CN201910185411.5A CN109807455A (en) | 2019-03-12 | 2019-03-12 | A kind of diffusion welding method of diffusion welding (DW) fixture and cupro-nickel composite sheet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299798A (en) * | 2020-03-06 | 2020-06-19 | 惠州锂威新能源科技有限公司 | Novel pole piece tab welding process |
| CN114734115A (en) * | 2022-04-19 | 2022-07-12 | 广东省科学院中乌焊接研究所 | Experimental fixture for brazing-diffusion welding and welding method for welding rod |
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| CN209614558U (en) * | 2019-03-12 | 2019-11-12 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of diffusion welding (DW) fixture |
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| CN111299798A (en) * | 2020-03-06 | 2020-06-19 | 惠州锂威新能源科技有限公司 | Novel pole piece tab welding process |
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