CN1071862A - The process for permanent bending of deformable bodies - Google Patents
The process for permanent bending of deformable bodies Download PDFInfo
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- CN1071862A CN1071862A CN92110045A CN92110045A CN1071862A CN 1071862 A CN1071862 A CN 1071862A CN 92110045 A CN92110045 A CN 92110045A CN 92110045 A CN92110045 A CN 92110045A CN 1071862 A CN1071862 A CN 1071862A
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- angular displacement
- plastic deformation
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- deformation
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005452 bending Methods 0.000 title claims description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 87
- 238000011088 calibration curve Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 56
- 229910052751 metal Inorganic materials 0.000 claims description 56
- 238000013459 approach Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 239000010665 pine oil Substances 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 description 9
- 239000000523 sample Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Prostheses (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Compressor (AREA)
Abstract
A kind of permanent bend method of slender body, its step has: obtain the relation between angular displacement that one section adds and gained plastic deformation, determine " angular displacement * plastic deformation " calibration curve equation; Fixing wherein one section, with respect to fixing point measure and write down another free section go up a bit at the beginning of the position; Make the angular displacement of free section to 60～90% or 110～120% of required deformation angle according to deformation direction and according to above-mentioned equation.Measure the new angle position of putting on the initial position and up till now compared, determine the deformation angle of acquisitions thus and make corresponding new equation, obtain respective angles and remake angular displacement until the final required form of acquisition.
Description
The present invention relates to the automatic bending method of common metal rod or metallic plate and so on different objects, make it to realize accurate plasticity or permanent deformation, and the micro-structural certain with it, molecular composition and/or size are irrelevant with respect to the deviation of each predetermined nominal value.
For the bar-shaped or plate body of getting elongated form usually, their automatic bending is finished by following operation, convention is that the vertical end of stretching direction of this kind object is fixed, and make its free end along intending finishing the direction of desired plasticity distortion by the bending only once of certain angular displacement do, this angular displacement then is that power is applied to the free end that this intends the zigzagger body, carries out single one-stop operation and finishes.For this reason, will be according to the nominal value of molecular composition, the structure of matter and the size aspect of intending the zigzagger body, need consider simultaneously from a collection of obtained value of object of bending, calculate this displacement and reach certain plastic deformation angle to guarantee this object with same structure and operating characteristic.
Using for some, in the automatic bending system of prior art, make the free section section of this kind object do an angular displacement in a certain direction, is that to be enough to make this to intend zigzagger body be required application and enterolithic in the permissible accuracy scope.
But in the time must in extremely strict limit, realizing bending or plastic deformation, the automatic bending method of prior art is not but considered the relevant parameter in each object plastic history in a collection of object that is equal to, i.e. the deviation that is showed with size, micro-structural and molecular composition usually in these objects.This problem can treat that with respect to each crooked object implements a series of buckling works with the accumulation mode, solves up to obtaining final required precise results.Yet in industrial production, for example being used for the leaf valve of small-sized refrigerating system hermetic compressor in manufacturing, is impossible make it accurately crooked by hand-guided to a series of deforming step that are applied to each leaf valve in practical operation.
In current known automatic bending system, for a collection of plan zigzagger body, be applied thereon the angular displacement that the free section section realizes final desired plasticity distortion, only considered that a special body size with nominal characteristic calculates.Except extremely accidental situation, in fact these are from large quantities of objects for the treatment of in the crooked object, relatively show each other on some size with micro-structural on variation.Like this, when according to the regulation of the leaf valve of above-mentioned closed compressor, just can not make in a collection of object all objects realize consistent automatically plastic deformation, and not depart from the strict accuracy rating of in advance these objects being determined.
For this reason, it is a kind of by High-Speed Automatic operation that general purpose of the present invention is to provide, make automatically and the permanently crooked method of deformable bodies, guaranteeing the pinpoint accuracy in the plastic deformation of this kind object, and micro-structural nominal with it, molecular composition and size are irrelevant with respect to the contingent deviation of desired nominal value.
Another purpose of the present invention is to make above-mentioned automatic bending method to be measured by the plastic deformation degree of angle object as the function of some dimensional parameters, and these parameters are the content of the outside of object, simultaneously also different because of object, thereby can be used as the function of this object external dimension, the plastic deformation of certain object realizes.Under such understanding, this method promptly is assembled into situation on the size variable part that belongs to another parts or object at the sort of parts that will treat bending, avoids whereby selecting and dividing into groups for the compatible parts of paired size.
According to the present invention, this method that makes deformable slender body make permanent bend below having proposed, in this kind slender bodies, to determine two parts that constitute dihedral angle, and to make these two parts be that the sweep of the longitudinal axis of this object of crosscut is united mutually by one at least basically, and the method comprises the steps:
(a) determine with experimental technique, around above-mentioned sweep to one of two longitudinal part sections with identical shaped object add the angular displacement of the different number of degrees and the relation between the gained plastic deformation; Determine the equation of " angular displacement * plastic deformation " calibration curve simultaneously for the shape of the object for the treatment of bending;
(b) from then on sweep rises, and another longitudinal part section of each object is fixed on the fastener;
(c), and note the initial value of this relative position with respect to the home position of at least one point of free section section of this object of fixed reference point measurement;
(d) around above-mentioned sweep and according to the desired plasticity deformation direction free section section of intending the zigzagger body is applied first angular displacement, the angle of this angular displacement, being decided equation with institute in the step (a) is certificate, is equivalent to make the deformation values of realization to be arranged in one of 60% to 90% interval of desired plasticity deformation angle and 110% to 120% interval;
(e) measure the new angle position of point aforementioned in this object free section section and relatively, to determine by the angle that originally was applied to the plastic deformation that angular displacement was obtained on this free section section it and previous position;
(f) according to the plastic deformation angle that is obtained in the step (e), set up the new equation of " angular displacement * plastic deformation " curve, this equation is exclusively used in the object that is in the respective curved stage, and, determined for realizing that the desired plasticity distortion should impose on the angular displacement that adds in addition of this free section section from mathematics as the function of this new specific curves;
(g) around same sweep, according to one with the middle suitable angle of being made of angle of step (f), the free section section of the object in this bending is applied another angular displacement;
(h) make the object in this bending experience step (e), (f) and a sequence (g) at least, to obtain final required plastic deformation; And
(i) pine oil has been issued to this object of final desired plasticity distortion from the aforementioned fastener.
The aforesaid operations program is in order to make object flexural deformation to using the angular displacement that only needs to do a plastic deformation for the second time within the required franchise.But, according to top regulation, step (e), (f) be to repeat in regular turn (g), the plastic deformation of object realizes required precision in bending.
Above-mentioned bending method also allows the automatic plastic deformation angle of stipulating to be applied on the object, and is the function of the latter as the variable-sized parameter of other necessary adaptive in operation parts.
This method gives another kind of possibility: can adopt the oppositely technology of back bending of part after initial bending, allaying the residual tensions in the bent bodies when being necessary, but still can keep finally required pinpoint accuracy in this bending.
Below with reference to accompanying drawing bending method of the present invention is described, in these accompanying drawings;
Fig. 1 is the block diagram that is suitable for the equipment of implementing above-mentioned bending step;
Fig. 2 shows nominal standard " angular displacement * plastic deformation " curve of the longitudinal part section of the bright a collection of sheet metal that is used for making small-sized sealing formula compressor leaf valve, is then implementing on the deformation direction therewith the home position separately as the permanent datum in this body home position; And
Fig. 3 then is the schematic forward sight elevation that is suitable for the equipment of implementing said method.
As previously mentioned, this method is particularly suitable for making the precision and automatic bending of closed compressor leaf valve with sheet metal by commercial production scale.More particularly, this method can enable as patent application BR9002967(corresponding to U.S series number 715818/91) described suction and the sheet of drain valve push the sheet metal of device to realize accurate plastic deformation.
According to accompanying drawing, this method is to reach a sheet metal or rod 10 accurate plastic deformation in this wise, curves even its end centers on the sweep of the longitudinal axis of this sheet metal 10 of a crosscut.In this example, this sheet metal 10 is expressed as a thin rod that pushes device as the aforementioned elasticity that small-sized sealing formula compressor reed valves in the application arranged earlier.For to be of similar shape, this predetermined plastic history of a collection of sheet metal 10 beginnings of relative dimensions, molecular composition and micro-structural, must establish by experiment around the relation between different angular displacement degree that above-mentioned sweep acts on one of 10 liang of vertical sections of sheet metal and the plastic deformation that obtains on vertically section.
Can reach the purpose of setting up above-mentioned relation by any suitable mode, need only the sheet metal 10 that it can be identical shaped to a collection of tool, determine a sample of " angular displacement * plastic deformation " like bending.
This experimentation can be the equation of definite " angular displacement * plastic deformation " calibration curve of typical shape of the sheet metal 10 for the treatment of bending.An example of this kind curve is shown in Fig. 2, and transverse axis is wherein represented plasticity or the permanent deformation that these sheet metals obtain, and the longitudinal axis then is expressed as to be obtained this kind distortion and act on angular displacement on this batch sheet metal.This curve shows the desirable nominal plasticity or the permanent deformation of the sheet metal expectation acquisition in the typical shape bending.
Should be noted that this curve or this plastic deformation begin after certain initial displacement is arranged on the longitudinal axis.This axial displacement comes from not crooked sheet metal, and the two has initial distance Do in the reference point of intending carrying out separating with it on the bending direction with one, also results from the initial elasticity distortion EDe of the sheet metal in the bending.
After the typical shape of having finished the sheet metal for the treatment of bending is determined the calibration curve of its " angular displacement * plastic deformation ", just can make this batch sheet metal 10 carry out effective bending.
For this purpose, each sheet metal 10 of intending bending is set on fastener shown in Figure 3 20 with its vertical section of stretching 11 that is positioned at the transverse bend lines either side, the latter comprises two hard metal parts or pad part 21, one of them is movable, can compress to another piece spare by automatic or nonautomatic appropriate device.Two piece spares 21 of fastener 20 should be configured to, and make that the above-mentioned part 11 that is held on the sheet metal 10 in the fastener 20 can be correctly and fully motionless.The part that this is fixing or portion's section 11 only are equivalent to the shortest vertical section of this sheet metal usually for sweep.
Should know each sheet metal 10 is positioned preferably to finish by automatics in the fastener 20, so just can guarantee that it is in place that sheet metal 10 can be distinguished when supplying metal sheet 10 in batch with being equal to.
After each sheet metal 10 had maintained static already, must note the home position that it intends the free section section 12 of in addition bending, make it the parameter when measuring the final angular displacement of the freedom sections 12 of intending putting on sheet metal 10.
Being suitable for a kind of method that writes down these sheet metal 10 home positions is, along the plane parallel with the sheet metal bending direction, measures with respect to the distance between any on the fixing reference point of fastener 20 and the free section 12 of sheet metal.
In Fig. 1 and 3, schematically shown a sensing device 30 fixing with respect to fastener 20, it comprises that one can be from moving to the probe 31 that ends when a bit contacting freedom of sheet metal 10 sections 12 corresponding to removing the position after the above-mentioned reference point.This probe 31 is the bending directions of agreing to sheet metal 10, also promptly one with free section 12 plane orthogonal in move, when it touches sheet metal 10, just can make this sensing device detect new data corresponding to one initial distance Do between permanent datum and the free section of sheet metal 12 home positions.
After having passed through this first few step, the free section 12 that just can make sheet metal 10 around one for fastener 20 itself along laterally or the sweep of laterally making roughly, carry out angular displacement at the place of meeting of the canned paragraph 11 of sheet metal and free section 12.For making this free section 12 along intending realizing that crooked directions do this angular displacement, for example can by one parallel with sweep and with one by for example 500 step/commentaries on classics of stepper motor 42() for example 0.5mm/ commentaries on classics of micrometer seat 41(of drive) cylindrical bar 40 of collaborative work realizes.
This initial angle displacement of free section 12 is finished by driving stepper motor 42, make free section 12 turn over an angle [alpha] by cylindrical rod 40 according to the direction of desiring the to obtain plastic deformation curve of going for a stroll, consider among Fig. 2 that for corresponding bright normal equation shown in the sheet metal in batch this α is corresponding to 60% to 90% of the plastic deformation angle value of desire realization.Should know that angle [alpha] represented among Fig. 3 is corresponding to imposing on the such angular displacement of free end 12, it makes the angle of plastic deformation less than angle α, this is owing to free end 12 flexible distortion, and this strain has been estimated when the sheet metal of this batch being treated bending is established " angular displacement * plastic deformation " calibration curve.
The operational order of stepper motor 42 be by CPU 50 for example the microcomputer shown in Fig. 1 provide, this computer operating personnel that can lead to, and send instruction for stepper motor 42 by a digital interface that includes stepper motor 42 dedicated control devices.
Like this, after the angle [alpha] that reaches corresponding to the 12 initial angle displacements of free section, the sub-assembly that cylindrical rod 40 is micrometer seat- motor 41,42 returns to be removed, and makes free section 12 can be back to the primary importance P1 of corresponding plastic distortion shown in Figure 3.At this moment, the probe 31 of CPU 50 instruction sensing devices 30 moves to once more and contacts with free section 12, make this sensing device can pass through a probe signal adjuster 52 and interface 51, send one corresponding to the information that obtains the first plastic deformation D1 for CPU 50, this CPU 50 is set up a new calibration curve for the sheet metal in the bending then, and determines another angular displacement beta of appending that will act on sheet metal 10 free sections 12 as the function of this new specific curves from the mathematics.At this moment give stepper motor 42 1 command adapted theretos again, make cylindrical rod 40 by 41 displacements of micrometer seat, this second angular displacement beta is passed to free section 12, then cylindrical rod 40 turns to an operating condition not, allow free section 12 to obtain corresponding second plastic deformation position P2, the latter is as the crooked function that approaches for the first time and through after this specific curves is done suitable correction, and is arranged in the desired numerical value of this application-specific.
Afterwards, just sheet metal 10 can be taken off from fastener 20.
Still it should be noted that, measure and be recorded in the CPU 50 by sensing device 30 in reference point and the initial distance that is in 10 of the sheet metals in home position, so that from the distance D 1 of sheet metal 10, it is deducted through recording after the plasticity angular distortion first time.
As shown in Figure 1, CPU 50 can connect another sensing device 70 effectively by an analog interface 60, the latter can be used to survey for example peculiar degree of depth that is located in of sheet metal of each plan bending, and be able to will be added on plastic deformation for this reason the value of angular displacement of each sheet metal 10, as being measured with the function of at least a size variable in the respective metal sheet of each special metal sheet combination.
In the possible embodiment of another kind, be to utilize from which section of measuring sheet metal as two received information of opposite face of the sheet metal of interlayer spare to be bent.Can finish said determination by reflection indirectly with a collection of sensing device or the time with optical sensing devices.
Being used for fixing plan, to state the fastener of interlayer spare on being out of shape be to make it self-drive by a position sensing device, the latter demonstrates the situation that the sheet metal of this interlayer is present in the surrounding environment and sends a signal to CPU, begins BENDING PROCESS then.In a kind of possible embodiment, CPU will begin this BENDING PROCESS, beam back an instruction to fastener, make each interlayer spare one vertical section of stretching fastening with respect to corresponding free section.Another embodiment then provides a kind of like this fastener, just can be fastening it when it is contiguous in case detect interlayer spare.In above two embodiment, the work that gets loose of crooked good sheet metal is all freely controlled by CPU and is carried out, and fastener is opened in its i.e. order after this sheet metal as the leaf valve forcing piece was curved already fixed.
Relevant with the motion of aforementioned micrometer seat when accepting to state interlayer spare on the bending process and start anamorphic attachment for cinemascope, the latter's load face is uploaded and has been held this anamorphic attachment for cinemascope and more corresponding sensing devices, they therefore and therewith interlayer spare do simultaneously forward or motion backward.In opposite situation, when the micrometer seat was uploaded the interlayer spare that remains bending, this interlayer spare will with respect to position sensing device and anamorphic attachment for cinemascope be done forward or motion backwards.
In the embodiments of the invention of description in the above, only be provided with a angular displacement and finish final required plastic deformation along the plastic deformation second time in the direction of angular displacement for the first time, but will be appreciated that the bending method here can comprise after this displacement for the first time that a collection of chasing after increases, conform with the angular displacement that the angle of following requirement is asked.
All chase after the angular displacement that increases and have the identical opposite direction of the direction of displacement first time therewith;
It is identical with the direction of angular displacement for the first time that some chases after the angular displacement that increases, the direction of remaining institute's tool then in contrast, and last displacement wherein can be selected the either direction in these two kinds of directions.
In addition, also can implement this method by the opposite angular displacement of both direction, the angular distortion value that first angular displacement is produced is equivalent to 110% to 120% of final desired plasticity deformation values.In this case, and increased first power under all other situations of the opposite angular displacement of a displacement of having appended chasing after at least with the displacement first time or with the front, carry out second angular displacement opposite of a direction and then can allay residual tensions in the previous displacement with said first angular displacement.
That is to say, in the above-described embodiment, can have an angular displacement of appending at least is direction along final desired plasticity distortion, and this angular displacement causes one to be out of shape the most approaching corresponding plastic deformation with final desired plasticity with respect to previous plastic deformation.
In the above-described embodiments, can provide a collection of angular displacement of appending along the direction of final required plastic deformation, the corresponding plastic deformation of row that they cause approaches final required plastic deformation gradually.
In the above-described embodiments, can make and above-mentioned a collection ofly append angular displacement certain sequencing is arranged.
In the above-described embodiments, above-mentionedly a collection ofly append angular displacement and all get the identical direction of direction with final desired plasticity distortion.
In the above-described embodiments, can be at least this batch append in the angular displacement last be to get and the opposite direction of its previous angular displacement.
In the above-described embodiments, last that can make at least that this batch append in the angular displacement got the direction opposite with first angular displacement.
In the above-described embodiments, can have at least an angular displacement in final plastic deformation direction to regulate the angular displacement of usefulness corresponding in the direction in contrast at least one in order.
In the above-described embodiments, can have an angular displacement at least is to get and the final opposite direction of desired plasticity deformation direction.
In addition, in the method shown in the foregoing description, can also include following step, promptly before described sheet metal is got loose, measure its free section new angle position of going up said point, and it is compared with the position that this should exist under required final state of plastic deformation, to determine the acceptability of this sheet metal.
Claims (11)
1, be used for making deformable slender body to make the method for permanent bend, in this kind slender bodies, to determine two parts that constitute dihedral angle, and to make these two parts be that the sweep of the longitudinal axis of this object of crosscut is united mutually by one at least basically, and the method is characterised in that it includes following steps:
(a) determine with experimental technique, around above-mentioned sweep to one of two longitudinal part sections with identical shaped object add the angular displacement of the different number of degrees and the relation between the gained plastic deformation; Determine the equation of " angular displacement * plastic deformation " calibration curve simultaneously for the shape of the object for the treatment of bending;
(b) from then on sweep rises, and another longitudinal part section of each object is fastened on the fastener;
(c), and note the initial value of this relative position with respect to the home position of at least one point of free section section of this object of fixed reference point measurement;
(d) around above-mentioned sweep and according to the desired plasticity deformation direction free section section of intending the zigzagger body is applied first angular displacement, the angle of this angular displacement, being decided equation with institute in the step (a) is certificate, is equivalent to make the deformation values of realization to be arranged in one of 60% to 90% interval of desired plasticity deformation angle and 110% to 120% interval;
(e) measure the new angle position of point aforementioned in this object free section section and relatively, to determine by the angle that originally was applied to the plastic deformation that angular displacement was obtained on this free section section it and previous position;
(f) according to the plastic deformation angle that is obtained in the step (e), set up the new equation of " angular displacement * plastic deformation " curve, this equation is exclusively used in the object that is in the respective curved stage, and, determined for realizing that the desired plasticity distortion should impose on the angular displacement that adds in addition of this free section section from mathematics as the function of this new specific curves;
(g) around same sweep, according to one with step (f) in the suitable angle of angle made, the free section section of the object in this bending is applied another angular displacement;
(h) make the object in this bending experience step (e), (f) and a sequence (g) at least, to obtain final required plastic deformation; And
(i) pine oil has been issued to this object of final desired plasticity distortion from the aforementioned fastener.
2, the method for claim 1, wherein having an angular displacement of appending at least is direction along final desired plasticity distortion, and this angular displacement causes one to be out of shape the most approaching corresponding plastic deformation with final desired plasticity with respect to previous plastic deformation.
3, method as claimed in claim 2, wherein the direction along final desired plasticity distortion provides a collection of angular displacement of appending, and the corresponding plastic deformation of row that they cause approaches final required plastic deformation gradually.
4, method as claimed in claim 3, a collection of angular displacement of wherein addressing of appending are successively orderly.
5, method as claimed in claim 4, a collection of angular displacement of wherein addressing of appending has identical direction.
6, method as claimed in claim 5, a collection of angular displacement of wherein addressing of appending are all got the identical direction of direction with final desired plasticity distortion.
7, method as claimed in claim 6 wherein is that in this batch angular displacement of appending last is to get and the opposite direction of its previous angular displacement at least.
8, method as claimed in claim 7 wherein is that in this batch angular displacement of appending last got and the opposite direction of said first angular displacement at least.
9, the method for claim 1 wherein has at least an angular displacement in final plastic deformation direction to regulate the angular displacement of usefulness corresponding in the direction in contrast at least one in order.
10, the method for claim 1, wherein having an angular displacement at least is to get and the final opposite direction of desired plasticity deformation direction.
11, the method for claim 1, wherein, the method also includes other step: before described sheet metal is got loose, measure its free section new angle position of going up said point, and it is compared with the position that this should exist under required final state of plastic deformation, to determine the acceptability of this sheet metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI9103814 | 1991-08-30 | ||
| BR919103814A BR9103814A (en) | 1991-08-30 | 1991-08-30 | PLASTICALLY DEFORMABLE BODY BENDING PROCESS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071862A true CN1071862A (en) | 1993-05-12 |
| CN1037497C CN1037497C (en) | 1998-02-25 |
Family
ID=4052719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92110045A Expired - Fee Related CN1037497C (en) | 1991-08-30 | 1992-08-26 | Process for permanent bending of deformable bodies |
Country Status (10)
| Country | Link |
|---|---|
| JP (2) | JP3454480B2 (en) |
| KR (1) | KR100244593B1 (en) |
| CN (1) | CN1037497C (en) |
| AT (1) | AT404100B (en) |
| BR (1) | BR9103814A (en) |
| DE (1) | DE4228566B4 (en) |
| ES (1) | ES2060520B1 (en) |
| FR (1) | FR2680711B1 (en) |
| GB (1) | GB2259037B (en) |
| IT (1) | IT1255346B (en) |
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| CN104785583A (en) * | 2015-04-14 | 2015-07-22 | 四川和鼎环保工程有限责任公司 | Photovoltaic plate covering processing device |
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| JPH07328723A (en) * | 1994-06-03 | 1995-12-19 | Kazunari Inoue | Method for bending sheet by press brake, etc. and portable bending angle measuring unit to be used thereof |
| CA2525693A1 (en) * | 2003-06-04 | 2004-12-16 | Finn-Power Oy | System for metering the bending angle in a machine for bending metallic sheets and/or sections, as well as method and machine for bending metallic sheets and/or sections using such system |
| DE102004043174A1 (en) * | 2004-09-03 | 2006-03-09 | Siemens Ag | Method and device for producing a bent lever wire |
| CN105618523A (en) * | 2014-11-25 | 2016-06-01 | 无锡市恒盛电机有限公司 | Metal plate bending device |
| CN105598223A (en) * | 2014-11-25 | 2016-05-25 | 无锡市恒盛电机有限公司 | Rolling type metal plate bending device |
| CN105689443A (en) * | 2014-11-25 | 2016-06-22 | 无锡市恒盛电机有限公司 | Intelligent-detection-based sheet metal bending processing device |
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| FR2085483A1 (en) * | 1970-04-24 | 1971-12-24 | Vallourec | Tube bending appts - allowing for relaxation of the bend dug to the resilience of the tube |
| US3821525A (en) * | 1972-03-16 | 1974-06-28 | Conrac Corp | Method and apparatus for automatically compensated tube bending |
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| DE3739173A1 (en) * | 1987-11-19 | 1989-06-01 | Feintool Int Holding | METHOD AND DEVICE FOR BENDING WORKPIECES |
| EP0401819A3 (en) * | 1989-06-08 | 1991-06-26 | Rasi Maschinenbau Und -Handels Gmbh | Method of bending tubes |
| BR9002967A (en) * | 1990-06-19 | 1991-12-24 | Brasil Compressores Sa | VALVE FOR HERMETIC COOLING COMPRESSOR |
-
1991
- 1991-08-30 BR BR919103814A patent/BR9103814A/en not_active IP Right Cessation
-
1992
- 1992-07-16 IT ITMI921731A patent/IT1255346B/en active IP Right Grant
- 1992-07-31 FR FR9209527A patent/FR2680711B1/en not_active Expired - Fee Related
- 1992-08-13 GB GB9217193A patent/GB2259037B/en not_active Expired - Fee Related
- 1992-08-14 KR KR1019920014638A patent/KR100244593B1/en not_active IP Right Cessation
- 1992-08-18 ES ES09201735A patent/ES2060520B1/en not_active Expired - Fee Related
- 1992-08-26 CN CN92110045A patent/CN1037497C/en not_active Expired - Fee Related
- 1992-08-27 DE DE4228566A patent/DE4228566B4/en not_active Expired - Fee Related
- 1992-08-28 AT AT0172892A patent/AT404100B/en not_active IP Right Cessation
- 1992-08-28 JP JP25391392A patent/JP3454480B2/en not_active Expired - Fee Related
-
2003
- 2003-03-25 JP JP2003082826A patent/JP2003275821A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785583A (en) * | 2015-04-14 | 2015-07-22 | 四川和鼎环保工程有限责任公司 | Photovoltaic plate covering processing device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100244593B1 (en) | 2000-03-02 |
| JP2003275821A (en) | 2003-09-30 |
| KR930003985A (en) | 1993-03-22 |
| JP3454480B2 (en) | 2003-10-06 |
| ES2060520B1 (en) | 1998-05-01 |
| DE4228566A1 (en) | 1993-03-04 |
| CN1037497C (en) | 1998-02-25 |
| ITMI921731A0 (en) | 1992-07-16 |
| JPH05212448A (en) | 1993-08-24 |
| BR9103814A (en) | 1993-03-30 |
| GB2259037A (en) | 1993-03-03 |
| ES2060520A2 (en) | 1994-11-16 |
| GB9217193D0 (en) | 1992-09-23 |
| IT1255346B (en) | 1995-10-31 |
| FR2680711A1 (en) | 1993-03-05 |
| ATA172892A (en) | 1998-01-15 |
| ES2060520R (en) | 1997-07-01 |
| AT404100B (en) | 1998-08-25 |
| GB2259037B (en) | 1995-03-01 |
| ITMI921731A1 (en) | 1994-01-16 |
| FR2680711B1 (en) | 1995-02-17 |
| DE4228566B4 (en) | 2005-05-25 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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Granted publication date: 19980225 |