CN101450489A - Broken membrane numerical-control milling machine stamping device and method - Google Patents
Broken membrane numerical-control milling machine stamping device and method Download PDFInfo
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- CN101450489A CN101450489A CNA2008103065229A CN200810306522A CN101450489A CN 101450489 A CN101450489 A CN 101450489A CN A2008103065229 A CNA2008103065229 A CN A2008103065229A CN 200810306522 A CN200810306522 A CN 200810306522A CN 101450489 A CN101450489 A CN 101450489A
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- milling machine
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- diaphragm
- broach shell
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Abstract
The invention discloses a CNC milling machine punching device and a punching method for a rupture disc, and relates to a device and a method for making indentations on the rupture disc. Aiming at the condition that a pressure machine meeting requirements and a MEMS photoetching process are not available during processing of indentations on the rupture disc, the invention provides a CNC milling machine punching device for the rupture disc, wherein the punching device uses a cutter holder arranged and clamped on the CNC milling machine to apply pressure to an upper die, and a lower surface of an upper die is a convex cut surface, which is determined according to the indentation structure of a disc needing to be ruptured. The invention also provides a CNC milling machine punching method for the rupture disc. The method comprises the steps of processing, arranging the upper die, fixing the disc to be ruptured and applying pressure to the upper die through the CNC milling machine. The device and the method need only a common CNC milling machine for realizing the indentation processing on the disc, is simple in operation, stable in processing quality, and is easy to popularize and use.
Description
Technical field
The invention belongs to a kind of manufacturing installation and method of diaphragm, be specifically related to a kind of manufacturing installation and method of rupture disc indentation.
Background technology
Rupture disc is in the dynamical system of rocket structure or weaponry, the main buffer action that rises, it is to utilize material to make the indentation of prefabricated definite shape as destroying principle work earlier under external force, when the pressure that acts on the diaphragm increased to a certain numerical value, diaphragm promptly broke along prefabricated indentation.
According to introducing in the disclosed data document, the indentation processing of rupture disc can adopt forcing press punching press, MEMS photoetching process to make.Introduce in " engine manufacturing technology " (Yuhang Publishing House): " the diaphragm indentation adopts mechanical compaction; select the forcing press that shows force value for use; and the pressing speed during by the compacting test specimen and pressure size are suppressed the indentation with batch diaphragm; if during with general lever hand press; make every effort to regularized operation, with maintenance indentation steady quality unanimity ".But because of requiring the diaphragm miniaturization in the modern times equipment design, therefore forcing press also there has been strict restriction, has not only required forcing press to show force value, also required the pressure tonnage little and precision is high.In reality processing, again because the pressing speed during compacting wayward causes the uniformity of diaphragm width of nick bad, poor reliability.In " rocket propulsion " the 31st volume the 1st phase " application of photoetching diaphragm in diaphragm valve " article, introduced the MEMS photolithography process of this type of diaphragm in addition, comprised diaphragm Chemical cleaning, oven dry, gluing, exposure, development, post bake, chemistry milling, remove photoresist, electrograving.But the MEMS photoetching process need possess conditions such as litho machine, baking oven, milling workbench, photoetching mould could be realized.
At present, rupture disc is except that using above-mentioned two kinds of methods processing, and also available traditional machining process is made, and as line cutting processing, milling machine milling etc., but the indentation quality of this kind method can not show a candle to forcing press punching press, MEMS photolithographic fabrication.
Summary of the invention
When the present invention is directed to processing rupture disc indentation, under the forcing press that nothing meets the demands, no MEMS photoetching process condition situation, the device and method of a kind of CNC milling machine stamped that provides.Adopt the present invention to carry out the indentation processing of diaphragm, only need general CNC milling machine to realize, and simple to operate, stable processing quality.
Described purpose is achieved by the following scheme:
A kind of broken membrane numerical-control milling machine decompressor, direct clamping broach shell is fixed with backing plate on the workbench under the broach shell on the main shaft of CNC milling machine, places diaphragm to be processed on the backing plate; The diaphragm top is provided with patrix, and the patrix lower surface is the protruding sword trace face of determining according to the score structure of need rupture disc.
Preferred structure is that described patrix is T-shaped, is provided with elastomeric pad between the lower surface at patrix step place and the upper surface of positioning sleeve.
Preferred structure is, is fixed with fairlead on the described backing plate, is provided with positioning sleeve in the fairlead, and the inner surface of positioning sleeve and patrix outer surface are suitable.
Patrix noted earlier, elastomeric pad, positioning sleeve all are that axle is the left-right symmetry shape with the center line.
The present invention provides a kind of broken membrane numerical-control milling machine process for stamping that uses said apparatus simultaneously:
The depth of parallelism p on plane is less than 0.01mm on the relative patrix of blade tip that needs definite patrix sword trace face before the formal processing; The minimum height values h of the blade tip of patrix sword trace face at the bottom of the sword must not require the hardness of patrix sword trace face to be higher than HRC50 less than the one-tenth-value thickness 1/10 for the treatment of the indentation diaphragm simultaneously.
In addition, before formal processing, need to determine the suitable drafts of broach shell that deterministic process can be one of two kinds of following A, B:
A. show the drop-out value of broach shell by the data of Digit Control Machine Tool, every pressure one-time detection is the indentation quality of matrix once, finally determines suitable drafts and pressure hold time.
B. connect dial gauge on the CNC milling machine workbench, determine the drop-out value of broach shell by dial gauge, every pressure one-time detection is the indentation quality of matrix once, finally determines suitable drafts and pressure hold time.
After foregoing is all determined, to treat rupture disc again and carry out the CNC milling machine punching press, method is:
At first, according to the score structure for the treatment of rupture disc, processing has the patrix of respective bump sword trace face;
Fixing backing plate on the workbench of CNC milling machine is placed diaphragm to be broken on backing plate, place patrix above diaphragm, and the protruding sword trace face of patrix is towards diaphragm upper surface;
Clamping broach shell on the main shaft of CNC milling machine, mobile broach shell move down and make its contact patrix and continue to exert pressure, and control on the broach shell and move, and get final product.
Manufacture method of the present invention comprises the following aspects:
1. adopt the CNC milling machine punching press: direct clamping broach shell (this broach shell need be removed chucking device) on CNC milling machine, again with broach shell to frock patrix imposed load, the frock patrix is pushed down into diaphragm upper surface in the guide effect of positioning sleeve and carries out indentation.
2. diaphragm indentation CNC milling machine decompressor design:
The broken membrane numerical-control milling machine decompressor mainly by CNC milling machine and patrix, elastomeric pad, positioning sleeve, fairlead, backing plate etc. with form.Patrix is the vital part in the diaphragm indentation frock, its sword trace face shape needs to determine according to the score structure of rupture disc, for guaranteeing the precision and the size of diaphragm indentation, require patrix sword trace face that sufficiently high hardness (being higher than HRC50) and higher flatness (less than 0.01mm) are arranged.
3. with dial gauge record machine tool chief axis drop-out value.For eliminating strain influences such as machine tool chief axis, decompressor, adopt dial gauge record machine tool chief axis drop-out value, and control width of nick with this parameter, it is stable to ensure the quality of products.
By actual verification and use, draw the present invention and have following characteristics:
1. it is die-cut to adopt CNC milling machine to replace forcing press to carry out, and has both satisfied the required precision of part to lathe, and the rigidity of sharp fully again lathe and flatness preferably are to decompressor patrix imposed load.
2. decompressor is simple in structure, practical.Patrix is pushed down into diaphragm upper surface in the guide effect of positioning sleeve.Elastomeric pad is compressed and transmits pressure given position cover simultaneously.Positioning sleeve compresses the diaphragm edge part, makes diaphragm edge not be prone to the perk distortion.
3. adopt dial gauge to detect and measure.Because strain all takes place for machine tool chief axis, broach shell, patrix and diaphragm during processing, numerical control shows that compression distance can not directly reflect the actual grade that is molded into diaphragm, with dial gauge table is played on the lathe plane for this reason, writes down actual lathe drop-out value.
4. accurate tool setting and clamping centering.During tool setting, remove elastomeric pad, make the patrix blade can directly touch diaphragm upper surface, mobile lathe Z axle utilizes clearance gauge to measure the gap of broach shell baseplane and patrix upper surface.Again elastomeric pad is put into mould after the tool setting, to prevent the blocked up or uneven thickness of elastomeric pad and influence the tool setting precision.
The broken membrane numerical-control milling machine process for stamping has guaranteed under the condition of not adding new equipment (litho machine etc.), utilizes the general NC milling machine to process the product that satisfies the demands, and constant product quality, is beneficial to and applies.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the installation diagram of patrix, elastomeric pad, positioning sleeve, fairlead, backing plate;
Fig. 3 is the I place enlarged diagram of Fig. 2;
Fig. 4 is the structural front view of patrix;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the B place structure amplification view of Fig. 4;
Fig. 7 is the A-A cutaway view of Fig. 5;
Fig. 8 is the circular score line rupture disc vertical view of the two hinge formulas of a kind of typical case;
Fig. 9 is the C-C cutaway view of Fig. 8;
Figure 10 is the D place enlarged diagram of Fig. 9;
Figure 11 is the burst test tables of data of rupture disc shown in Figure 8.
Wherein, milling machine 1, broach shell 2, workbench 3, backing plate 4, diaphragm 5, patrix 6, fairlead 7, positioning sleeve 8, elastomeric pad 9, dial gauge 10.
The specific embodiment
Elaborate the preferred embodiment of the present invention below in conjunction with accompanying drawing.
1. rupture disc design
According to the original foundation of design, as the structure and the size of design rupture discs such as fracture pressure, working media, diaphragm latus rectum.The rupture disc that designs in the filling isolating valve of certain model is the circular score line diaphragm of the two hinge formulas of a typical case, sees Fig. 8, Fig. 9, Figure 10, and its key technical indexes sees Table 1.By calculating, the residual thickness of diaphragm indentation should be between 0.06mm～0.09mm, but because of reasons such as material, processing, assemblings, the residual thickness of actual membrane indentation will be determined by sampling test.
Table 1 rupture disc the key technical indexes
| Diaphragm material | L2M δ＝0.5mm YS/T213-94 |
| The diaphragm external diameter | φ20mm |
| The indentation diameter | φ10mm |
| The indentation angle | 30° |
| Fracture pressure | (1.1±0.15)MPa |
2. broken membrane numerical-control milling machine decompressor:
According to requirements such as the score structure of rupture disc, technologies, design a kind of broken membrane numerical-control milling machine decompressor, see Fig. 1, Fig. 2.It comprises patrix, elastomeric pad, positioning sleeve, fairlead, backing plate and screw etc., wherein, patrix, elastomeric pad, positioning sleeve, fairlead all are to be the revolving body of axle with the center line, and the patrix lower surface is the protruding sword trace face of determining according to the score structure of need rupture disc.Backing plate and fairlead are connected and fixed with screw, and positioning sleeve is that benchmark, patrix are that benchmark assembles with the endoporus of fairlead with the endoporus of fairlead.Patrix is T-shaped, is provided with elastomeric pad between the lower surface at patrix step place and the upper surface of positioning sleeve, so that control and adjustment assembly precision.
During operation on the main shaft of CNC milling machine direct clamping broach shell, said apparatus is inverted, remove the sub-assembly of backing plate and fairlead, diaphragm to be processed is placed in the stopper slot of positioning sleeve, again with the sub-assembly left-hand thread of backing plate and fairlead on positioning sleeve, after being inverted, lie in gently in the table plane zone under the broach shell of having beaten the table centering.
3. rupture disc technical process
At first carry out burst test,, finally determine suitable machined parameters, formally produce again by the test of many times products obtained therefrom is tested respectively.
Machining or punch out diaphragm profile → indentation → explosion bulge test → check.
Judge by burst test whether machined parameters is suitable.Must arrange burst test and processing to carry out simultaneously during test.Send after diaphragm processes and carry out burst test between pressure.Test data feeds back in processor or the technology person hand in real time.Processor or technology person adjust machined parameters until processing qualified diaphragm in real time according to test data.
Burst test: undertaken by the rupture of diaphragm test specification.
4. rupture disc indentation processing
4.1 prepare before the processing
4.1.1 need before processing to prepare: a CNC milling machine, a cover indentation frock, dial gauge, clearance gauge, cutter rouse each one of chi.
4.1.2 earlier the indentation frock is tested before the processing.The depth of parallelism on plane is less than 0.01mm on the relative patrix of blade tip of main inspection patrix sword trace face; The minimum height values of the blade tip of patrix sword trace face at the bottom of the sword must not be less than the one-tenth-value thickness 1/10 0.5mm that treats the indentation diaphragm.Then patrix is repaired as if finding that above-mentioned data are undesirable, until qualified.
Carry out reference record 4.1.3 make form earlier before the processing, form sees Table 2, wherein beats gauge pressure and makes by oneself deeply.
Table 2 rupture disc machined parameters record sheet
| Sequence number | Digital display is pressed dark mm | Beat the dark mm of gauge pressure | Fracture pressure MPa | Remarks |
| 1 | ||||
| 2 |
4.2 processing method and step
4.2.1 clamping and centering broach shell
Utilize lathe aspiration clamping broach shell, the low speed rotation main shaft.Measure the perpendicularity of the relative Z axle in broach shell baseplane with dial gauge.Require these data less than 0.02.
4.2.2 clamping and centering workbench
This workbench places on the platen.The perpendicularity that operation lathe X, Y-axis surveying work platform are placed the relative Z axle of die region.Require these data less than 0.01.
The diaphragm 4.2.3 pack into
Get one on diaphragm to be processed, measure its flatness with cutter drum chi earlier.If find no light leak, in the mould of then diaphragm being packed into.When noting installing, be inverted entire die earlier, remove the sub-assembly of backing plate and fairlead, diaphragm is placed in the stopper slot of positioning sleeve.With the sub-assembly left-hand thread of backing plate and fairlead on positioning sleeve.Inversion is returned, and lies in gently in the table plane zone of beating the table centering.
4.2.4 tool setting
Remove elastomeric pad, make the patrix blade can directly touch diaphragm upper surface.Mobile lathe Z axle utilizes clearance gauge to measure the gap of broach shell baseplane and patrix upper surface.
4.2.5 set zero-bit (digital display and play table)
According to the data of tool setting just now, change the initial position that digital display is demarcated patrix, with dial gauge indicator push type broach cover step surface, the rotation bezel, cluster is set zero-bit simultaneously.
4.2.6 processing indentation
The Z axle that moves up is encased in elastomeric pad in the mould.According to the data-selected scheme of formulating, decline Z axle makes patrix move down the distance of appointment.Keep the regular hour (5s), be retracted into the height (broach shell is apart from plane 10mm on the patrix) of appointment then.After processing diaphragm, mold integral is taken off workbench, and in positioning sleeve, release diaphragm gently, again it is numbered sign with little glue rod.Continue machined diaphragm, repeat this step, keep working specification unified.And in time observe the lathe digital display and beat the difference of showing between the demonstration.
4.3 indentation qualification determination
After preceding 10 diaphragms process, extract wherein one, sever, observe the V-arrangement cross section, its residual thickness of accurate measurement perpendicular to the indentation trajectory.And, determine general parameter area as benchmark.Constantly carry out burst test, qualified and its variance and average meet the requirements (variance≤0.05, average≤1.1 ± 0.1) up to the fracture pressure of finding to have continuous 5 products.Under this parameter, continue a collection of product of processing, and extract each 5 of first and last and carry out burst test, if all qualified then assert that this batch product is qualified.If have part defective proceed processing and the test, up to have a collection of qualified till.
5. result of the test
According to the processing method of rupture disc, through overtesting, obtain one group of relatively reasonable parameter, present embodiment is for beating the dark 0.57mm of gauge pressure.So carry out the indentation processing of rupture disc, the processing back is extracted the part test specimen and is detected.Concrete data see Table 3 and Figure 11.According to test data, can judge the machined parameters selection rationally, fracture pressure satisfies (1.1 ± 0.15) MPa, and rupture disc processing is qualified.
Table 3 rupture disc processing experiment tables of data
| Sequence number | Digital display is pressed dark mm | Beat the dark mm of gauge pressure | Hold time s | Fracture pressure MPa | Remarks |
| 1 | 0.86 | 0.57 | 5 | 1.05 | |
| 2 | 0.84 | 0.57 | 5 | 1.1 | |
| 3 | 0.85 | 0.57 | 5 | 1.06 | |
| 4 | 0.85 | 0.57 | 5 | 1.05 | |
| 5 | 0.84 | 0.57 | 5 | 1.06 | |
| 6 | 0.85 | 0.57 | 5 | |
|
| 7 | 0.84 | 0.57 | 5 | 1.05 | |
| 8 | 0.86 | 0.57 | 5 | 1.07 | |
| 9 | 0.86 | 0.57 | 5 | 1.04 | |
| 10 | 0.85 | 0.57 | 5 | 1.06 | |
| 11 | 0.85 | 0.57 | 5 | 1.07 | |
| 12 | 0.85 | 0.57 | 5 | Keep |
| 13 | 0.84 | 0.57 | 5 | Keep | |
| 14 | 0.84 | 0.57 | 5 | Keep | |
| 15 | 0.84 | 0.57 | 5 | 1.11 | |
| 16 | 0.84 | 0.57 | 5 | Keep | |
| 17 | 0.84 | 0.57 | 5 | Keep | |
| 18 | 0.84 | 0.57 | 5 | 1.08 | |
| 19 | 0.84 | 0.57 | 5 | 1.03 | |
| 20 | 0.85 | 0.57 | 5 | 1.1 | |
| 21 | 0.84 | 0.57 | 5 | 1.08 | |
| 22 | 0.85 | 0.57 | 5 | 1.07 |
Present embodiment is the protection domain that the exemplary illustration of this patent is not limited it; those skilled in the art can also carry out the part to it and change; so long as do not exceed the spiritual essence of this patent, all belong to the replacement that is equal to, therefore all within the protection domain of this patent to this patent.
Claims (9)
- [claim 1] a kind of broken membrane numerical-control milling machine decompressor is characterized in that direct clamping broach shell on CNC milling machine, is fixed with backing plate on the workbench under the broach shell, places diaphragm on the backing plate; The diaphragm top is provided with patrix, and the patrix lower surface is the protruding sword trace face of determining according to the score structure of need rupture disc.
- [claim 2] broken membrane numerical-control milling machine decompressor according to claim 1 is characterized in that being fixed with fairlead on the described backing plate, is provided with positioning sleeve in the fairlead, and the inner surface of positioning sleeve and patrix outer surface are suitable.
- [claim 3] broken membrane numerical-control milling machine decompressor according to claim 2 is characterized in that described patrix is T-shaped, is provided with elastomeric pad between the lower surface at patrix step place and the upper surface of positioning sleeve.
- [claim 4] is characterized in that according to claim 1,2 or 3 described broken membrane numerical-control milling machine decompressors described patrix, elastomeric pad, positioning sleeve all are that axle is the left-right symmetry shape with the center line.
- [claim 5] a kind of broken membrane numerical-control milling machine process for stamping is characterized in that:At first, according to the score structure for the treatment of rupture disc, processing has the patrix of respective bump sword trace face;Fixing backing plate on the workbench of CNC milling machine is placed diaphragm to be broken on backing plate, place patrix above diaphragm, and the protruding sword trace face of patrix is towards diaphragm upper surface;Clamping broach shell on the main shaft of CNC milling machine, mobile broach shell move down and make its contact patrix and continue to exert pressure, and control on the broach shell and move, and get final product.
- [claim 6] broken membrane numerical-control milling machine process for stamping according to claim 5, it is characterized in that: before formal processing, need to determine the suitable drafts of broach shell, deterministic process is as follows: the drop-out value that shows broach shell by the data of Digit Control Machine Tool, every pressure one-time detection is the indentation quality of matrix once, finally determines suitable drafts and pressure hold time.
- [claim 7] broken membrane numerical-control milling machine process for stamping according to claim 5, it is characterized in that: before formal processing, need to determine the suitable drafts of broach shell, deterministic process is as follows: connect dial gauge on the CNC milling machine workbench, determine the drop-out value of broach shell by dial gauge, every pressure one-time detection is the indentation quality of matrix once, finally determines suitable drafts and pressure hold time.
- [claim 8] is characterized in that according to claim 5,6 or 7 described broken membrane numerical-control milling machine process for stamping: the depth of parallelism on plane on the relative patrix of blade tip of patrix sword trace face, and this is worth less than 0.01mm; The minimum height values of the blade tip of patrix sword trace face at the bottom of the sword, this value must not be less than the one-tenth-value thickness 1/10 for the treatment of the indentation diaphragm.
- [claim 9] broken membrane numerical-control milling machine process for stamping according to claim 8 is characterized in that: the hardness of patrix sword trace face is higher than HRC50.
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| CNA2008103065229A CN101450489A (en) | 2008-12-25 | 2008-12-25 | Broken membrane numerical-control milling machine stamping device and method |
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| CNA2008103065229A CN101450489A (en) | 2008-12-25 | 2008-12-25 | Broken membrane numerical-control milling machine stamping device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802365A (en) * | 2012-08-24 | 2012-11-28 | 皆利士多层线路版(中山)有限公司 | Manufacturing method for embedding copper heat sink into circuit board |
| CN103639942A (en) * | 2013-11-28 | 2014-03-19 | 无锡市航鹄科技有限公司 | Tool for installing and pressing positioning pin |
| CN110102636A (en) * | 2019-05-08 | 2019-08-09 | 沈阳航天新光集团有限公司 | The method for improving low pressure explosion piece manufacture stability |
-
2008
- 2008-12-25 CN CNA2008103065229A patent/CN101450489A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802365A (en) * | 2012-08-24 | 2012-11-28 | 皆利士多层线路版(中山)有限公司 | Manufacturing method for embedding copper heat sink into circuit board |
| CN102802365B (en) * | 2012-08-24 | 2014-12-17 | 皆利士多层线路版(中山)有限公司 | Manufacturing method for embedding copper heat sink into circuit board |
| CN103639942A (en) * | 2013-11-28 | 2014-03-19 | 无锡市航鹄科技有限公司 | Tool for installing and pressing positioning pin |
| CN110102636A (en) * | 2019-05-08 | 2019-08-09 | 沈阳航天新光集团有限公司 | The method for improving low pressure explosion piece manufacture stability |
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Open date: 20090610 |