CN102554057B - Positioning process for integral press forming of large-size curved-surface workpieces - Google Patents
Positioning process for integral press forming of large-size curved-surface workpieces Download PDFInfo
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- CN102554057B CN102554057B CN201110352556.3A CN201110352556A CN102554057B CN 102554057 B CN102554057 B CN 102554057B CN 201110352556 A CN201110352556 A CN 201110352556A CN 102554057 B CN102554057 B CN 102554057B
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Abstract
A positioning process for integral press forming of large-size curved-surface workpieces includes: the first step, providing a press forming mould which comprises an upper mould and a lower mould matched with each other; the second step, positioning a plate onto the lower mould; the third step, squeezing the plate positioned on the lower mould by the upper mould to form a primary curve-surface workpiece; and the fourth step, forming cutting lines on the primary curved-surface workpiece so as to cut a large-size curved-surface workpiece in the desired shape on the basis of the cutting lines. A plurality of marking units are arranged on the upper mould or the lower mould and form a plurality of marks on the primary curved-surface workpiece in the third step, and then the cutting lines are formed on the basis of the marks in the fourth step.
Description
Technical field
The present invention relates to the compressing localization method of a kind of large-scale curved whole workpiece, be particularly useful for (warm moulding and high-temperature molding particularly) after moulding and carry out the large-scale curved workpiece of the secondary cut localization method on mould when compressing, this localization method can also be applied to the mechanical manufacturing field such as nuclear power generating equipment, pressure vessel and chemical industry equipment.
Background technology
What at present the location of steel plate on mould was conventional is the parts such as location-plate, alignment pin, pin stop, side edge, but this is only applicable to small-sized, manual operation workpiece easily.For the complex-shaped or location difficulty of large-scale workpiece on mould, and workpiece easily to produce trace mobile, uncontrollable, cause final compressing workpiece shape, size and theory deviation to some extent.
Particularly compressing for large scale, multi-curvature, high accuracy steel plate, maximum employing segmentation mold pressings adds and presses, this technique workpiece in pressing process relies on line to locate on mould, and for the movement of large-scale workpiece pressing process light plate, rely on manual operation or pass through the method lifting, this method is very high to operative employee's requirement, and efficiency is low, and shaping workpiece precision is low.
In addition, for the large-scale curved plate of warm moulding in adopting and high-temperature molding, while adopting the parts such as location-plate, alignment pin, pin stop, side edge to position, under the environment of middle gentle high temperature, at need, operating environment is poor, has great insecurity in operation.
Although the compacting of the technique of integral die is convenient, in compressing process, the location of workpiece is more difficult, and particularly in pressing process, the control for steel plate localization method has no disclosure at present.
Summary of the invention
For solving at least one aspect of above-mentioned technical problem of the prior art, the present invention is proposed.
According to technical scheme of the present invention, can in compressing process, position workpiece by the device that forms the marking at surface of the work, compressingly carry out secondary cut according to location marking line afterwards, thereby can solve effectively, easily the positional dissection precision problem of large-scale curved slab integral after compressing.
According to an aspect of the present invention, propose the compressing localization method of a kind of large-scale curved whole workpiece, comprised the steps: step 1: press-moulding die is provided, and described press-moulding die has comprised the mold and the bed die that are fitted to each other; Step 2: sheet material is navigated on bed die; Step 3: utilize mold to push the sheet material being positioned on bed die to form preliminary curve surface work pieces; And step 4: form line of cut on described preliminary curve surface work pieces, to cut out the large-scale curved workpiece of intended shape based on this line of cut, wherein: on described mold or bed die, be provided with multiple labelling apparatus, in step 3, described multiple labelling apparatus forms multiple marks on preliminary curve surface work pieces, and in step 4, form described line of cut based on described multiple marks.
Advantageously, in said method, described multiple labelling apparatus comprises multiple main pip devices, described multiple main pip device is forming multiple main pips on preliminary curve surface work pieces, and the large-scale curved workpiece of described intended shape is positioned at described multiple main pip and on described preliminary curve surface work pieces, is connected in turn within the loop curve forming.
Advantageously, described preliminary curve surface work pieces is rectangular or trapezoidal shape roughly in top view, and described main pip comprises four marks that are formed on described rectangle or trapezoidal bight.
Further, described sheet material is through just navigating on bed die after cutting, and the edge of the described sheet material of described loop curve distance has the surplus of 50-150mm.
Further, in step 4, measurement device is also provided, and described measurement device is designated as benchmark with described multiple principal marks and determines preliminary line of cut, then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.Further, the described loop curve of described preliminary line of cut distance has the surplus of 0-100mm.
Advantageously, described multiple labelling apparatus also comprise multiple aid mark devices, and described multiple aid mark devices form multiple aid marks on preliminary curve surface work pieces, and described multiple aid marks are formed between adjacent main pip along described loop curve.In step 4, measurement device is also provided, described measurement device is determined preliminary line of cut taking described multiple main pips and at least a portion aid mark as benchmark, then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.
Further, along described loop curve, the medium position substantially between every two adjacent main pips forms at least one aid mark.Advantageously, between step 3 and step 4, also comprise step 5: lift mold, and described preliminary curve surface work pieces is placed on support, and in step 5, the position on described support according to described aid mark adjustment or definite described preliminary curve surface work pieces.
Advantageously, in step 4, measurement device is also provided, and described measurement device is determined preliminary line of cut with described multiple benchmark that are labeled as, and then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.
Advantageously, above-mentioned design data comprises design arc length and the design action at the edge of the large-scale curved workpiece of described intended shape.
In above method, advantageously, described in each, labelling apparatus comprises locating hole and is arranged in this locating hole to expose the mark part of end, and described mark part forms described multiple mark in step 3 on described preliminary curve surface work pieces.Alternatively, described mark part is made up of graphite or low intensity metal.
Described in each, labelling apparatus also can be the projection on the pressed surface that is formed on mold or bed die.
In above method, described large-scale curved workpiece is the parts of assembled used in nuclear power station steel containment vessel.
In above method, the area of described sheet material is greater than 4 square metres.
Brief description of the drawings
The present invention further describes with reference to the accompanying drawings, wherein:
The schematic diagram of the compressing localization method of Fig. 1 large-scale curved whole workpiece according to an embodiment of the invention;
Fig. 2 is the schematic perspective view of the mold in Fig. 1, wherein shows the labelling apparatus being arranged on pressed surface.
Detailed description of the invention
Although fully describe the present invention with reference to the accompanying drawing that contains preferred embodiment of the present invention, should be appreciated that those of ordinary skill in the art can revise invention described herein, obtained technique effect of the present invention before this describe simultaneously.Therefore, must understand above description to those of ordinary skill in the art and Yan Weiyi discloses widely, and its content does not lie in restriction exemplary embodiment described in the invention.
Below with reference to Fig. 1,2, the localization method compressing according to the large-scale curved whole workpiece of a kind of exemplary embodiment of the present invention described.Fig. 1 is the schematic diagram of the compressing localization method of large-scale curved whole workpiece according to an embodiment of the invention.Fig. 2 is the schematic perspective view of the mold in Fig. 1, wherein shows the labelling apparatus 4 being arranged on pressed surface.Described method comprises the steps:
Step 1: press-moulding die is provided, and described press-moulding die comprises the mold 1 and the bed die (not shown) that are fitted to each other;
Step 2: for example, by sheet material (not shown, the metallic plate of steel plate, or other can the compressing sheet material of entirety), navigate on bed die;
Step 3: utilize mold 1 to push the sheet material being positioned on bed die to form preliminary curve surface work pieces 2; And
Step 4: on described preliminary curve surface work pieces 2, form line of cut 21, to cut out the large-scale curved workpiece 22 of intended shape based on this line of cut 21,
Wherein:
On described mold 1 or bed die (being on mold 1 in Fig. 1), be provided with multiple labelling apparatus 4, in step 3, described multiple labelling apparatus 4 forms multiple marks 3 on preliminary curve surface work pieces 2, and in step 4, forms described line of cut 21 based on described multiple marks 3.
Described multiple labelling apparatus 4 comprises multiple main pip devices 41, described multiple main pip device 41 forms multiple main pip A, B, C, D on preliminary curve surface work pieces, referring to Fig. 1, the large-scale curved workpiece of described intended shape is positioned at described multiple main pip and on described preliminary curve surface work pieces, is connected in turn within the loop curve 23 that forms.The position and the quantity that it should be noted that the main pip are here only schematically, as long as main pip can help to determine line of cut 21.The large-scale curved workpiece 22 of described intended shape is positioned at described multiple main pip and on described preliminary curve surface work pieces 2, is connected in turn within the loop curve 23 that forms.It is also to be noted that, although in specific embodiments of the invention, loop curve 23 circle cut secants 21 arrange,, within loop curve 23 also can be arranged on line of cut 21, or, within main pip also can be positioned at the line of cut 21 for secondary cut.
Described preliminary curve surface work pieces 2 can be rectangular or trapezoidal shape roughly in top view, and described main pip comprises four marks that are formed on described rectangle or trapezoidal bight.
Described sheet material navigates on bed die after just cutting (, once cutting), and the edge of the described sheet material of described loop curve 23 distance has the surplus of 50-150mm.
In step 4, measurement device also can be provided, described measurement device is designated as benchmark with described multiple principal marks and determines preliminary line of cut, then according to the design data of the large-scale curved workpiece of intended shape to described preliminary line of cut adjustment form described line of cut (be secondary cut based on line of cut).The described loop curve of described preliminary line of cut distance has the surplus of 0-100mm.In the situation that surplus is 0, loop curve itself just can be formed as this preliminary line of cut.Described design data comprises design arc length and the design action at the edge of the large-scale curved workpiece 22 of described intended shape.
Described multiple labelling apparatus 4 also can comprise multiple aid mark devices 42, described multiple aid mark device 42 forms multiple aid mark E-J on preliminary curve surface work pieces 2, as shown in fig. 1, described multiple aid mark is formed between adjacent main pip along described loop curve.Alternatively, in step 4, measurement device is also provided, described measurement device is determined preliminary line of cut taking described multiple main pips and at least a portion aid mark as benchmark, then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.Advantageously, along described loop curve 23, the medium position substantially between every two adjacent main pips forms at least one aid mark.The position and the quantity that it should be noted that the aid mark are here only also schematic.
Advantageously, between step 3 and step 4, also comprise step 5: lift mold 1, and described preliminary curve surface work pieces 2 is placed on support (not shown), and in step 5, the position on described support according to described aid mark adjustment or definite described preliminary curve surface work pieces 2.For example, aiming at the correspondence position on support at aid mark, can assert that preliminary curve surface work pieces 2 has correctly been positioned on support, so that carry out precise cutting (or secondary cut) subsequently.Equally, in step 4, also provide measurement device, described measurement device is determined preliminary line of cut with described multiple benchmark that are labeled as, and then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.Advantageously, described design data comprises design arc length and the design action at the edge of the large-scale curved workpiece of described intended shape.
Described in each, labelling apparatus 4 comprises locating hole and is arranged in this locating hole to expose the mark part of end, and described mark part forms described multiple mark in step 3 on described preliminary curve surface work pieces.Described mark part is made up of graphite or low intensity metal.In locating hole, fill the colored substances such as graphite or low intensity metal is installed, when compressing, the colored substance such as graphite or low intensive metal can leave the marking on workpiece, still high-visible after compacting.
Alternatively, described in each labelling apparatus 4 for being formed on the projection on the pressed surface of mold or bed die.Or alternatively, described in each, labelling apparatus 4 can be for being formed on the recess on the pressed surface of mold or bed die.Significantly, thus the hardness of this projection of the hardness of mold or bed die or this recess higher than the hardness of downtrodden sheet material.
Locating hole, projection or recess are positioned at the compact dimensions scope of curve surface work pieces, and particular location is determined according to shape, edge arc length and the cutting technique of the final large-scale curved workpiece of expecting.
Can be applied to the mechanical manufacturing field such as nuclear power generating equipment, pressure vessel and chemical industry equipment according to said method of the present invention.More specifically, said method of the present invention can be for the parts of the compressing assembled used in nuclear power station steel containment vessel of entirety.
In the present invention, be preferably more than 4 square metres for the area of the compressing sheet material of entirety.
Illustrate according to the compressing technological process of large-scale curved workpiece of the present invention as an example of the compressing large-scale curved steel plate of entirety example below.This technological process comprises successively: blanking cutting; Just location; Compressing; Secondary precise cutting.Wherein:
Blanking cutting (corresponding to once cutting above): according to shape, size and the die size of the large-scale curved workpiece 22 of intended shape, steel plate is carried out to rough lumber and cut.The theoretical shape camber line for the large-scale curved workpiece 22 of intended shape (or line of cut 21) above that is designed and sized to that steel plate cutting cuts to requirement outwards reserves 100mm surplus;
Just location: steel plate is directly put to mould, and this process is without accurate location.
Compressing: the location of compressing process light plate relies on the positioner 4 of the bottom surface of mold.Positioner 4 forms 10 points (some A-J) on steel plate, and leave about 30mm surplus on the theoretical shape camber line of product (or line of cut 21) above basis, to ensure that product is within the scope of the imprint area forming, wherein A, B, C, tetra-angle points of D are for having suppressed the datum mark of rear formation line of cut 21 (or secondary cut line), and the large-scale curved workpiece 22 that some E-J is intended shape is located use on support.Locating hole is filled the colored substances such as graphite or low intensity metal is installed, when compressing, the colored substance such as graphite or low intensive metal can leave the marking on workpiece, the marking A-J forming is corresponding to the position of locating hole, after compacting, this marking or mark are still high-visible, can be convenient for measuring like this time, find benchmark and location accurately, do not need again to determine benchmark, thereby, even if steel plate has slight inclination in the time just starting to place, rely on positioning datum can find very easily anchor point.
Secondary precise cutting: after patrix lifts, preliminary curve surface work pieces 2 is lifted to support, adjust or the position of definite preliminary curve surface work pieces 2 on support according to the aid mark E-J forming; Utilize measurement device, for example laser measuring equipment, start as the inside about 30mm of benchmark place to measure taking A, B, C, D point, measurement device will calculate arc length, the action etc. at measured edge automatically, and finely tune according to the comparative result of measurement data and gross data, rule thereby search out suitable edge, then, carry out precise cutting based on this line.
Adopt the compressing localization method of large-scale curved whole workpiece of the present invention, can not affect the size after final steel sheet metal forming, when raising the efficiency, also can ensure the size conforms quality requirement after steel plate compacting.Particularly, the method according to this invention at least can obtain one of following technique effect:
(1) the compacting anchor point that the localization method utilization of patent of the present invention is set in the pressed surface on large-scale curved board mold positions, compared with parts such as adopting location-plate, alignment pin, pin stop, side edge positions, simple to operate.
(2) localization method that patent of the present invention is described, simple, easy to operate for the positioning requirements before large-scale curved plate compacting, reduce labour intensity, improve operating efficiency.
(3) localization method that patent of the present invention is described, has overcome that large-scale curved plate weight is large, has produced slippage in pressing process, the impact of blank irregularity, the mobile unfavorable factors such as inconvenient, can increase work efficiency.
(4) localization method that patent of the present invention is described, again according to compacting location impression carries out secondary cut after suppressing by entirety, has guaranteed curved slab compacting precision, improves yield rate.
(5) localization method that patent of the present invention is described, the accurate adjustment requirement while having reduced middle temperature moulding and high-temperature molding curved slab location, increases work efficiency.
(6) localization method that patent of the present invention is described, the accurate adjustment requirement while having reduced middle temperature moulding and high-temperature molding curved slab location, has improved workman's operating environment greatly, improves security.
After describing preferred embodiment of the present invention in detail; those of ordinary skill in the art can clearly understand; can carry out various variations and change not departing under the protection domain of the claim of enclosing and spirit, and the present invention is not also limited to the embodiment of examples cited embodiment in description.
Claims (18)
1. the compressing localization method of large-scale curved whole workpiece, comprises the steps:
Step 1: press-moulding die is provided, and described press-moulding die comprises the mold and the bed die that are fitted to each other;
Step 2: sheet material is navigated on bed die;
Step 3: utilize mold to push the sheet material being positioned on bed die to form preliminary curve surface work pieces; And
Step 4: on described preliminary curve surface work pieces, form line of cut, to cut out the large-scale curved workpiece of intended shape based on this line of cut,
Wherein:
On described mold or bed die, be provided with multiple labelling apparatus, in step 3, described multiple labelling apparatus form multiple marks on preliminary curve surface work pieces, and in step 4, form described line of cut based on described multiple marks.
2. method according to claim 1, wherein:
Described multiple labelling apparatus comprises multiple main pip devices, described multiple main pip device is forming multiple main pips on preliminary curve surface work pieces, and the large-scale curved workpiece of described intended shape is positioned at described multiple main pip and on described preliminary curve surface work pieces, is connected in turn within the loop curve forming.
3. method according to claim 2, wherein:
Described sheet material is through just navigating on bed die after cutting, and the edge of the described sheet material of described loop curve distance has the surplus of 50-150mm.
4. method according to claim 3, wherein:
In step 4, measurement device is also provided, described measurement device is designated as benchmark with described multiple principal marks and determines preliminary line of cut, then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.
5. method according to claim 4, wherein:
The described loop curve of described preliminary line of cut distance has the surplus of 0-100mm.
6. method according to claim 4, wherein:
Described design data comprises design arc length and the design action at the edge of the large-scale curved workpiece of described intended shape.
7. method according to claim 2, wherein:
Described preliminary curve surface work pieces is rectangular or trapezoidal shape roughly in top view, and described main pip comprises four marks that are formed on described rectangle or trapezoidal bight.
8. method according to claim 2, wherein:
Described multiple labelling apparatus also comprises multiple aid mark devices, and described multiple aid mark devices form multiple aid marks on preliminary curve surface work pieces, and described multiple aid marks are formed between adjacent main pip along described loop curve.
9. method according to claim 8, wherein:
In step 4, measurement device is also provided, described measurement device is determined preliminary line of cut taking described multiple main pips and at least a portion aid mark as benchmark, then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.
10. method according to claim 8, wherein:
Along described loop curve, the medium position substantially between every two adjacent main pips forms at least one aid mark.
11. methods according to claim 8, wherein:
Between step 3 and step 4, also comprise step 5: lift mold, and described preliminary curve surface work pieces is placed on support, and in step 5, the position on described support according to described aid mark adjustment or definite described preliminary curve surface work pieces.
12. methods according to claim 1, wherein:
In step 4, measurement device is also provided, described measurement device is determined preliminary line of cut with described multiple benchmark that are labeled as, and then according to the design data of the large-scale curved workpiece of intended shape, described preliminary line of cut adjustment is formed to described line of cut.
13. methods according to claim 12, wherein:
Described design data comprises design arc length and the design action at the edge of the large-scale curved workpiece of described intended shape.
14. according to the method described in any one in claim 1-13, wherein:
Described in each, labelling apparatus comprises locating hole and is arranged in this locating hole to expose the mark part of end, and described mark part forms described multiple mark in step 3 on described preliminary curve surface work pieces.
15. methods according to claim 14, wherein:
Described mark part is made up of graphite or low intensity metal.
16. methods according to claim 14, wherein:
Described in each, labelling apparatus is the projection being formed on the pressed surface of mold or bed die.
17. according to the method described in any one in claim 1-13, wherein:
Described large-scale curved workpiece is the parts of assembled used in nuclear power station steel containment vessel.
18. according to the method described in any one in claim 1-13, wherein:
The area of described sheet material is greater than 4 square metres.
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| CN103658232B (en) * | 2012-08-30 | 2015-06-24 | 攀钢集团攀枝花钢钒有限公司 | Method for measuring actual rolling reduction of upper roll of roll straightener |
| CN105013905B (en) * | 2015-06-17 | 2017-06-06 | 沈阳飞机工业（集团）有限公司 | A kind of process of large-scale curved composite material I cartridge plate global formation |
| CN112191938B (en) * | 2020-09-15 | 2021-09-28 | 南京航空航天大学 | Large sheet metal part machining method based on intelligent operation trolley |
| CN112371846B (en) * | 2020-10-22 | 2022-05-10 | 中国航发贵州黎阳航空动力有限公司 | Multifunctional skin stretch-forming die and stretch-forming method |
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| JP2003220623A (en) * | 2002-01-30 | 2003-08-05 | Hoshi Seisakusho:Kk | Method for forming tertiary curved surface molding display board |
| CN1689723A (en) * | 2004-04-21 | 2005-11-02 | 渤海船舶重工有限责任公司 | Double curvature plate cold press forming method and equipment thereof |
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| CN201702283U (en) * | 2010-05-10 | 2011-01-12 | 浙江来斯奥电气有限公司 | Workpiece positioning device |
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| JP3489378B2 (en) * | 1997-03-03 | 2004-01-19 | 三菱自動車工業株式会社 | Press equipment |
| JPH11197761A (en) * | 1998-01-13 | 1999-07-27 | Yasumasa Saiki | Positioning method of panel in press die |
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| JP2003220623A (en) * | 2002-01-30 | 2003-08-05 | Hoshi Seisakusho:Kk | Method for forming tertiary curved surface molding display board |
| CN1689723A (en) * | 2004-04-21 | 2005-11-02 | 渤海船舶重工有限责任公司 | Double curvature plate cold press forming method and equipment thereof |
| CN201338049Y (en) * | 2009-01-21 | 2009-11-04 | 东风襄樊旋压件有限公司 | Punch device |
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