CN108942425A - A kind of bipolar plates Special Fixture for Machining and the bipolar plates processing method using the fixture - Google Patents
A kind of bipolar plates Special Fixture for Machining and the bipolar plates processing method using the fixture Download PDFInfo
- Publication number
- CN108942425A CN108942425A CN201811133568.5A CN201811133568A CN108942425A CN 108942425 A CN108942425 A CN 108942425A CN 201811133568 A CN201811133568 A CN 201811133568A CN 108942425 A CN108942425 A CN 108942425A
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- China
- Prior art keywords
- bipolar plates
- road junction
- graphite
- processing
- special fixture
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
- B28D7/046—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work the supporting or holding device being of the vacuum type
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The present invention discloses a kind of bipolar plates Special Fixture for Machining and the bipolar plates processing method using the fixture, for the graphite bi-polar plate in processing fuel-cell, the graphite bi-polar plate has mainstream road junction, seal groove, shunts road junction, runner, and wherein processing method includes the following steps: grinding machine on A. graphite plate；B. milling machine mills shape on graphite plate；C. graphite plate clamping is to bipolar plates Special Fixture for Machining；D. the first surface current of bipolar plates road, seal groove processing and runner mouth half are processed；E. bipolar plates mainstream road junction and the processing of shunting road junction；F. bipolar plates Special Fixture for Machining is closed, bipolar plates are removed；G. bipolar plates turn-over clamping；H. bipolar plates the second surface current road and seal groove are processed.The present invention solves the problems such as existing graphite bi-polar plate clamp for machining is complicated, and the clamping time is long, and mismachining tolerance is big, and the present invention has machining accuracy high, and fixture needed for processing is simple, and procedure of processing is few, processes the advantages that quick.
Description
Technical field
The present invention relates to field of mechanical technique, in particular to a kind of bipolar plates Special Fixture for Machining and pair using the fixture
Polar plate processing method.
Background technique
Fuel cell can be used for electric car, mobile power source, power station, mobile thunder as a kind of high-efficiency cleaning energy
It reaches and aerospace industry, has become various countries' competitively commercialized research hotspot in recent years.Bipolar plates are being fired as its key components and parts
Afflux, air guide, trapping and mechanical support effect are played in material battery.Fuel battery double plates processing method has punching press, roller at present
Pressure and machining.Pressing and roll-in method are applied mainly for metal double polar plates, but since metal double polar plates anticorrosion ability is poor
When need to carry out corrosion-inhibiting coating processing, production technology is relative complex, thus rare company trade product use metal double polar plates.Stone
Black bipolar plates become the choosing of most of commercialization fuel cells since itself just has good anticorrosion and electrical and thermal conductivity
It selects.
The processing of graphite bipolar plate of fuel battery at present can be used machine-tooled method or flexible graphite plate cold pressing or use
Hot-pressing forms after graphite powder is mixed with phenolic resin.Cool molded graphite bipolar plates are the flexible graphite plates made by expanded graphite
It is stamped to form, often contains a large amount of micro-bubbles, therefore need resin immersion treatment to reach trapping effect, the complex process and system
It is long to make the period.Hot pressing graphite bi-polar plate needs the graphite powder production of long period and hybrid resin to prepare early period, and when hot pressing
The heating time needed is long, generally requires several hours, equally exists the long disadvantage of fabrication cycle, at the same hot pressing bipolar plates due to
Joined nonconductive resin reduces the conductivity of fuel cell.Therefore graphite bi-polar plate mostly uses greatly machining mode to make at present
Make, but due in its structure of graphite bi-polar plate two sides have conduit and through-hole, it can not be added with conventional vacuum chuck
Work, therefore current machine-tooled method mostly uses greatly the complicated fixture of specific customization to process graphite bi-polar plate, this method
The shortcomings that being difficult to ensure there is clamping time length, large labor intensity, processing cost height and machining accuracy, is unable to satisfy fuel
High, the at low cost and high in machining efficiency demand of battery commercial applications precision.
Application No. is the applications for a patent for invention of CN102832398B to disclose the novel stone of a proton exchanging film fuel battery
The processing tool of black carbon plate, Authorization Notice No. CN102832398B patent cannot be to same bipolar plates opening areas to be processed
With non-open area carry out it is independent vacuumize control, can only realize that the different time of cathode plate and anode plate is processed, therefore
It can not achieve the through-hole processing of cathode plate or anode plate.The patent of invention vacuumize panel fluting it is wider, cannot be to stone to be processed
Black plate provides good rigid plane fitting support, is likely to occur landslide when carrying out thin bipolar plates processing of the thickness less than 1mm
Or metaboly, machining accuracy cannot be guaranteed.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of special fixture of bipolar plates processing and uses the fixture
Bipolar plates processing method.
The present invention provides a kind of special fixture of bipolar plates processing, for the graphite bi-polar plate in processing fuel-cell, packet
It includes:
One pedestal, two turning quick unions, two through swtich quick unions, several tracheaes, a threeway connect fastly
Head, two circle sealing strips and several seal plugs；The pedestal front is equipped with bipolar plates placing groove, the bipolar plates placing groove
Bottom surface is equipped with array rectangle and is connected to air channel, and the side of base is additionally provided with a main suction hole and two side suction holes；Two
Turning quick union, threeway quick union, which are respectively arranged in two side suction holes and main air-breathing aperture and are concatenated by tracheae, to be connected
It is logical；Two through swtich quick unions are separately positioned between the threeway quick union and two turning quick unions；
The two circle sealing strips are for being arranged in bipolar plates and bipolar plates placing groove bottom in bipolar plates turn-over clamping
Between face, places bipolar plates and the bipolar plates and form two sealing areas, the mainstream road junction, runner between groove bottom
Mouth and two side suction holes are in a sealing area.
Several seal plugs and mainstream road junction and shunting road junction correspond, for being to block the mainstream in clamping
Road junction and shunting road junction.
Preferably, the turning quick connector, through swtich quick connector are in mirror surface by symmetry axis of tee joint quick-insertion connector
Setting.
Preferably, the left side of the bipolar plates placing groove and upper side are benchmark face, the left side of the special fixture
It is benchmark face with upper side；The size of the air channel and position meet: when clamping, the air channel and bipolar plates outer edge are protected
Stay 1~2mm frame.
Preferably, the special fixture opens several sulculuses around bipolar plates placing groove, facilitate bipolar plates in clamping
Push positioning and taking-up after processing is completed.
Preferably, the material of the seal plug is silicon rubber or the flexible rubber such as fluorubber or nitrile rubber
Product.
Preferably, the sealing strip is the silicon rubber bar that compression ratio is more than 20%.
Preferably, the bottom surface of the special fixture, left side and upper side are finished, the bipolar plates are placed
Bottom surface, left side and the upper side of slot are finished, and guarantee that groove bottom error is placed in special fixture bottom surface and bipolar plates
It is flatness error within 0.01mm, the side error of perpendicularity is less than 0.005mm.
It is described for the graphite bi-polar plate in processing fuel-cell the present invention also provides a kind of method of bipolar plates processing
Graphite bi-polar plate has mainstream road junction, seal groove, shunts road junction, runner, which is characterized in that using as described in claim 1
Special fixture, include the following steps:
A. grinding machine on graphite plate: graphite hardboard being sucked with vacuum chuck and is ground on grinding machine, after being ground one side, then
It is being ground, is being repeated until reaching bipolar plates plane precision requirement after graphite plate turn-over is sucked；
B. milling machine mills shape on graphite plate: adding appearance profile is carried out after graphite plate universal vacuum sucker clamp clamping
Work；
C. graphite plate clamping is to the special fixture: two circle sealing joint strips is arranged on the special fixture, by graphite plate
It is close to two datum level clamping of left side and upper left face；
D. the first surface current of bipolar plates road, seal groove processing and runner mouth half are processed: being opened two on the special fixture pipeline
Side switch valve and air-breathing main line, then process sealing ring conduit, the flow field in the first face of bipolar plates, and process bipolar plates sprue
Mouthful and shunt road junction to half depth；
E. it bipolar plates mainstream road junction and the processing of shunting road junction: closes two sides switch valve on special fixture pipeline and processes bipolar plates
Mainstream road junction and shunting road junction extremely penetrate through；
F. the special fixture is closed, bipolar plates are removed: closing the air-breathing main line on the special fixture, and from dedicated
Bipolar plates are removed at fixture surrounding fluting；
G. bipolar plates turn-over clamping: mainstream road junction is blocked using seal plug and shunts road junction in the enterprising luggage of special fixture
Folder；
H. bipolar plates the second surface current road and seal groove are processed.
Preferably, the grinding parameter in the step A are as follows: for grinding wheel density between 6~9, grinding speed is 12~30m/
S, grinding depth are 0.002~0.01mm, and work speed is 10~20m/min.
Preferably, milling mode is climb cutting, 5000~7000r/min of speed of mainshaft when roughing, feeding in the step B
Amount is 2500~3500mm/min, and the finishing speed of mainshaft is more than or equal to 8000r/min, and the amount of feeding is 1000mm~2000mm/
min。
Preferably, the method for arranging of the sealing strip are as follows: wherein one circle sealing strip be arranged in bipolar plates mainstream road junction and
It shunts within the scope of road junction, another circle is arranged between the seal groove of bipolar plates and contour line and as close as possible to bipolar plates contour line.
Preferably, in described step A, B, D, E, H plus man-hour requirement carries out on special graphite process equipment, when processing into
Row is air-cooled dry to be cut and bed dust catcher of being switched on carries out a graphite dust absorption.
Preferably, process tool used in process is the cutting tool coated with hard alloy or gold for being suitble to machining graphite
Hard rock coated cutting tool or polycrystal diamond cutter, grinding knife tool are machining graphite special grinding wheel.
Preferably, using 0.06~0.08Mpa negative pressure in the step G when clamping bipolar plates, guarantee that bipolar plates clamping can
Clamping deformation or the conquassation leaned on and prevent bipolar plates from vacantly locating conduit.
Using technical solution of the present invention, have the advantages that
1. the processing method that the present invention uses can vacuumize region, ingenious realization by reasonable arrangement processing sequence and control
Graphite bi-polar plate with porosity characteristics and thickness in 1mm or so is processed, using the fitting principle positioning of high-precision rigid plane,
With machining accuracy height, the simple feature of clamping；
2. the invention avoids the complicated fixture clamping for using specific customization, the vacuum chuck clamp structure that the present invention uses
Simple and reliable, at low cost and easy to manufacture and maintenance can vacuumize region according to process requirements control after ingenious arrangement sealing strip,
That realizes mainstream road junction, shunting road junction and flow field regions vacuumizes control respectively, prevents gas leakage when processing hole and occurs bipolar
Plate can not clamping phenomenon, reduce clamping times when two-sided processing graphite bipolar plates, reduce the working strength of labor；
3. the processing method that the present invention uses is realized bipolar with porosity characteristics using the cooperation processing of silica gel sealing plug
The rapid processing of plate has the characteristics that process velocity is fast, while can be big by using optimal process tool and Optimizing Process Parameters
It is big to reduce process time, improve processing efficiency.
Detailed description of the invention
Fig. 1 is graphite bi-polar plate structure front view of the present invention；
Fig. 2 is the front view that special fixture of the present invention removes seal plug；
Fig. 3 is graphite bi-polar plate procedure of processing flow chart of the present invention；
Fig. 4 is the schematic perspective view after graphite plate of the present invention and special fixture assembly.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Referring to Fig.1, the graphite bi-polar plate 1 in fuel cell has several mainstream road junctions 11, seal groove, several runners
Mouth 12, runner.
Referring to Fig. 2 and Fig. 4, the present invention provides a kind of bipolar plates Special Fixture for Machining, including 2, two turnings of a pedestal are fast
5,3, two through swtich quick unions 4 of connector, several tracheaes threeway quick unions 6, two enclose sealing strips 7 and several
A seal plug 9；2 front of pedestal is equipped with bipolar plates placing groove, and the bipolar plates are placed groove bottom and connected equipped with array rectangle
Air drain 8 all, at square grid shape, 2 side of pedestal is additionally provided with a main suction hole and two side suction holes；Two turnings are fast
Connector 3, threeway quick union 6 are respectively arranged in two side suction holes and main air-breathing aperture and by the concatenation connections of tracheae 5；Two
A through swtich quick union 4 is separately positioned between the threeway quick union 6 and two turning quick unions 3；Dress
When folder, a circle is set to 1 mainstream road junction 11 of bipolar plates and shunts the corresponding position in 12 range of road junction in the two circle sealing strips 7,
Another circle is arranged between 1 seal groove of bipolar plates and contour line and as close as possible to 1 contour line of bipolar plates；Several seal plugs
9 correspond with mainstream road junction 11 and shunting road junction 12, for blocking the mainstream road junction 11 in clamping and shunting road junction 12.
The turning quick connector 3, through swtich quick connector 4 are that symmetry axis is arranged in mirror surface with tee joint quick-insertion connector 6.
The material of the seal plug 9 is silicon rubber or the flexible rubber-based products such as fluorubber or nitrile rubber.
The sealing strip 7 is the silicon rubber bar that compression ratio is more than 20%.
The left side of the bipolar plates placing groove and upper side are benchmark face, the left side of the special fixture and upper side
For benchmark face；The size of the air channel and position meet: when clamping, the air channel 8 and 1 outer edge of bipolar plates retain 1~
2mm frame.
Bottom surface, left side and the upper side of the special fixture are finished, the bottom of the bipolar plates placing groove
Face, left side and upper side are finished, and guaranteeing that groove bottom error is placed in special fixture bottom surface and bipolar plates is plane
Error is spent within 0.01mm, and the side error of perpendicularity is less than 0.005mm.
The special fixture opens several sulculuses around bipolar plates placing groove, and facilitating bipolar plates 1, backup is extremely in clamping
Left side datum level and taking-up after processing is completed.
Referring to Fig. 3, Fig. 4, the present invention also provides a kind of methods that the bipolar plates using above-mentioned special fixture are processed, and are used for
Graphite bi-polar plate in processing fuel-cell, the graphite bi-polar plate 1 have mainstream road junction 11, seal groove, shunt road junction 12,
Runner includes the following steps:
A. grinding machine on graphite plate: graphite hardboard being sucked with vacuum chuck and is ground on grinding machine, after being ground one side, then
It is being ground, is being repeated until reaching bipolar plates plane precision requirement after graphite plate turn-over is sucked；
B. milling machine mills shape on graphite plate: adding appearance profile is carried out after graphite plate universal vacuum sucker clamp clamping
Work；
C. graphite plate clamping is to special fixture: arranging the two circle sealing strips 7 on special fixture, graphite plate is close to double
Two datum level clamping of pole plate placing groove left side and upper side；
D. the first surface current of bipolar plates road, seal groove processing and runner mouth half are processed: being opened two sides on special fixture pipeline and opened
Close valve and air-breathing main line, then process sealing ring conduit, the flow field in the first face of bipolar plates, and process bipolar plates mainstream road junction and
Road junction is shunted to half depth；
E. bipolar plates mainstream road junction and the processing of shunting road junction: two sides switch valve on special fixture pipeline is closed, is processed bipolar
The mainstream road junction 11 of plate 1 and shunting road junction 12 to perforation；
F. special fixture is closed, removes bipolar plates 1: closing the air-breathing main line on special fixture, and from special fixture four
Bipolar plates are removed at all flutings；
G. bipolar plates turn-over clamping: mainstream road junction 11 is blocked using seal plug 9 and shunts road junction 12 on special fixture
Carry out clamping；
H. bipolar plates the second surface current road and seal groove are processed.
Grinding parameter in the step A are as follows: for grinding wheel density between 6~9, grinding speed is 12~30m/s, and grinding is deep
Degree is 0.002~0.01mm, and work speed is 10~20m/min.
Milling mode is climb cutting in the step B, and the speed of mainshaft is 6000r/min, the amount of feeding 3000mm/ when roughing
Min, the finishing speed of mainshaft are 8000r/min, amount of feeding 1500mm/min.
The method for arranging of sealing strip 7 in the step C are as follows: wherein a circle sealing strip 7 is arranged in the mainstream road junction of bipolar plates 1
11 and shunt 12 range of road junction in, another circle is arranged between the seal groove and contour line of bipolar plates 1 and as close as possible to bipolar plates
Contour line so that bipolar plates 1 and the bipolar plates, which are placed, forms two sealing areas between groove bottom, the mainstream road junction 11 and
Road junction 12 is shunted to be in a sealing area.
In described step A, B, D, E, H plus man-hour requirement carries out on special graphite process equipment, and when processing carries out air-cooled
It is dry to cut and bed dust catcher of being switched on carries out a graphite dust absorption.
Process tool used in process is that the cutting tool coated with hard alloy of machining graphite or diamond is suitble to apply
Layer cutter or polycrystal diamond cutter, the grinding knife tool are machining graphite special grinding wheel.
0.06~0.08Mpa negative pressure is used in the step G when clamping bipolar plates, guarantees that bipolar plates clamping is reliable and prevents
Bipolar plates vacantly locate clamping deformation or the conquassation of conduit.
In the procedure of processing G after 1 turn-over of bipolar plates due to the machined mainstream road junction 11 in the first face, shunt road junction 12, close
Seal slot and runner not can guarantee sealing at this time, and then can not use suction vacuum clamping.By the present invention in that stifled with seal plug
Firmly mainstream road junction 11 and shunting road junction 12, cooperate outer ring sealing strip 7, so that bipolar plates 1 can be when turn-over be processed to aperture
Place, which is sealed, to be come on clamping to special fixture.
The present invention is optimized in processing technology, and when processing stream road junction through-hole is first machined to surplus 0.5mm, then carries out
Through-hole is machined to run through by local vacuum-pumping control, and avoidable through-hole is caused when being machined to run through to vacuumize gas leak phenomenon, together
When influence when avoiding just starting just to carry out local vacuum-pumping processing to the integral smoothness of bipolar plates clamping, and then raising runner
Machining accuracy.Meanwhile runner mouth through-hole made allowance be set as 0.5mm (0.5mm be graphite plate under 150KPa evacuated state not
There is the minimum thickness that destroys) can to avoid machining allowance when tool sharpening through-hole when larger due to graphite that hair vibration phenomenon causes
Plate chipping, the optimization of technological parameter can guarantee to process the precision of through-hole to greatest extent.
Compared with Authorization Notice No. CN 102832398B patent, the present invention can control in bipolar plates to be processed not the present invention
With the evacuated state in region, therefore secondary clamping is not had to when through-hole in bipolar plates is processed, while special fixture of the invention
Pedestal realizes that the gas vacuumized is uniformly distributed, it can be achieved that thickness is high-precision in 1mm graphite plate below by the conduit of miniature connection
Degree processing.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of special fixture of bipolar plates processing, for the graphite bi-polar plate in processing fuel-cell, which is characterized in that including
One pedestal, two turning quick unions, two through swtich quick unions, several tracheaes, a threeway quick union, two circles are close
Strip of paper used for sealing and several seal plugs；The pedestal front is equipped with bipolar plates placing groove, and the bipolar plates are placed groove bottom and are equipped with
Array rectangle is connected to air channel, and the side of base is additionally provided with a main suction hole and two side suction holes；Two turnings connect fastly
Connector, threeway quick union are respectively arranged in two side suction holes and main air-breathing aperture and are concatenated by tracheae and be connected to；Two institutes
Through swtich quick union is stated to be separately positioned between the threeway quick union and two turning quick unions；
The two circle sealing strips for be arranged in bipolar plates in bipolar plates turn-over clamping and the bipolar plates place groove bottom it
Between, place bipolar plates and the bipolar plates and form two sealing areas between groove bottom, the mainstream road junction, shunt road junction with
And two side suction holes are in a sealing area.
Several seal plugs and mainstream road junction and shunting road junction correspond, for blocking the mainstream road junction in clamping
And shunt road junction.
2. special fixture according to claim 1, which is characterized in that the turning quick connector, the fast grafting of through swtich
Head is arranged using tee joint quick-insertion connector as symmetry axis in mirror surface.
3. special fixture according to claim 1, which is characterized in that if the special fixture is opened around bipolar plates placing groove
Dry sulculus, facilitates bipolar plates to push positioning and taking-up after processing is completed in clamping.
4. a kind of method of bipolar plates processing, for the graphite bi-polar plate in processing fuel-cell, the graphite bi-polar plate has
Mainstream road junction, shunts road junction, runner at seal groove, which is characterized in that special fixture as described in claim 1 is used, including
Following steps:
A. grinding machine on graphite plate: graphite hardboard being sucked with vacuum chuck and is ground on grinding machine, after being ground one side, then by stone
Black plate turn-over is being ground after being sucked, and is repeated until reaching bipolar plates plane precision requirement；
B. milling machine mills shape on graphite plate: will carry out appearance profile processing after graphite plate universal vacuum sucker clamp clamping；
C. graphite plate clamping is to the special fixture: arranging two circle sealing joint strips on the special fixture, graphite plate is close to
Two datum level clamping of left side and upper left face；
D. the first surface current of bipolar plates road, seal groove processing and runner mouth half are processed: being opened two sides on the special fixture pipeline and opened
Close valve and air-breathing main line, then process sealing ring conduit, the flow field in the first face of bipolar plates, and process bipolar plates mainstream road junction and
Road junction is shunted to half depth；
E. it bipolar plates mainstream road junction and the processing of shunting road junction: closes two sides switch valve on special fixture pipeline and processes bipolar plates mainstream
Road junction and shunting road junction extremely penetrate through；
F. the special fixture is closed, bipolar plates are removed: closing the air-breathing main line on the special fixture, and from special fixture
Bipolar plates are removed at surrounding fluting；
G. bipolar plates turn-over clamping: blocking mainstream road junction using seal plug and shunts road junction presss from both sides in the enterprising luggage of special fixture；
H. bipolar plates the second surface current road and seal groove are processed.
5. the method for bipolar plates processing according to claim 4, which is characterized in that the grinding parameter in the step A are as follows:
Grinding wheel density between 6~9, grinding speed be 12~30m/s, grinding depth be 0.002~0.01mm, work speed be 10~
20m/min。
6. the method for bipolar plates processing according to claim 4, which is characterized in that milling mode is suitable in the step B
Milling, 5000~7000r/min of speed of mainshaft when roughing, the amount of feeding are 2500~3500mm/min, and the finishing speed of mainshaft is big
In being equal to 8000r/min, the amount of feeding is 1000mm~2000mm/min.
7. the method for bipolar plates processing according to claim 4, which is characterized in that the method for arranging of the sealing strip are as follows:
Wherein a circle sealing strip is arranged in the mainstream road junction of bipolar plates and shunts within the scope of road junction, another to enclose the sealing for being arranged in bipolar plates
Between slot and contour line and as close as possible to bipolar plates contour line.
8. the method for bipolar plates processing according to claim 4, which is characterized in that processed in described step A, B, D, E, H
When need to carry out on special graphite process equipment, when processing, carries out air-cooled dry cut and the dust catcher that is switched on carries out a graphite dust suction
It removes.
9. the method for bipolar plates processing according to claim 4, which is characterized in that processing knife used in process
Have and is for the cutting tool coated with hard alloy or diamond-coated tools or polycrystal diamond cutter, grinding knife tool for being suitble to machining graphite
Machining graphite special grinding wheel.
10. the method for bipolar plates processing according to claim 4, which is characterized in that in the step G when clamping bipolar plates
Using 0.06~0.08Mpa negative pressure, guarantee the clamping deformation or pressure that bipolar plates clamping is reliable and prevents bipolar plates from vacantly locating conduit
It bursts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133568.5A CN108942425B (en) | 2018-09-27 | 2018-09-27 | Special fixture for machining bipolar plate and bipolar plate machining method using fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133568.5A CN108942425B (en) | 2018-09-27 | 2018-09-27 | Special fixture for machining bipolar plate and bipolar plate machining method using fixture |
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| Publication Number | Publication Date |
|---|---|
| CN108942425A true CN108942425A (en) | 2018-12-07 |
| CN108942425B CN108942425B (en) | 2023-08-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264841A (en) * | 2020-10-27 | 2021-01-26 | 许子隆 | Preparation and processing method of high-temperature-resistant graphite conductive material |
| CN113334582A (en) * | 2021-06-08 | 2021-09-03 | 一汽解放汽车有限公司 | Graphite bipolar plate processing device and processing method |
| CN115558929A (en) * | 2022-09-27 | 2023-01-03 | 深圳市金泉益科技有限公司 | Titanium etching bipolar plate workpiece placing substrate with clamp |
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| CN115558929A (en) * | 2022-09-27 | 2023-01-03 | 深圳市金泉益科技有限公司 | Titanium etching bipolar plate workpiece placing substrate with clamp |
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