CN102554057A - 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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- CN102554057A CN102554057A CN2011103525563A CN201110352556A CN102554057A CN 102554057 A CN102554057 A CN 102554057A CN 2011103525563 A CN2011103525563 A CN 2011103525563A CN 201110352556 A CN201110352556 A CN 201110352556A CN 102554057 A CN102554057 A CN 102554057A
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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 a kind of localization method of large-scale curved whole workpiece compression moulding; Localization method when being particularly useful for (warm moulding and high-temperature molding particularly) after the moulding and carrying out the large-scale curved workpiece compression moulding of secondary cut on mould, this localization method can also be applied to 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 commonly used is parts such as location-plate, alignment pin, pin stop, side edge, but that this is only applicable to is small-sized, manually-operated workpiece easily.For the complex-shaped or location difficulty of large-scale workpiece on mould, and workpiece is easy to generate trace and moves, and is uncontrollable, and workpiece shape, size and the theory that causes final compression moulding be deviation to some extent.
Particularly for large scale, multi-curvature, the compression moulding of high accuracy steel plate; Maximum employing segmentation mold pressings pressure of adding some points, this technology workpiece in pressing process relies on line on mould, to locate, and moving for large-scale workpiece pressing process light plate; Rely on manually-operated or method through lifting; This method is very high to operative employee's requirement, and efficient is low, and the shaping workpiece precision is low.
In addition, for the large-scale curved plate of warm moulding in adopting and high-temperature molding, when adopting parts such as location-plate, alignment pin, pin stop, side edge to position, under the environment of middle gentle high temperature, operate at need, operating environment is poor, has great insecurity.
Though the compacting of the technology of integral die is convenient, the location of workpiece is difficult in the compression moulding process, and particularly disclosure is not seen in the control for the steel plate localization method at present in pressing process.
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 the compression moulding process, workpiece be positioned through the device that forms the marking at surface of the work; Carry out secondary cut according to location marking line after the compression moulding, thereby can solve the location cutting accuracy problem after the large-scale curved slab integral compression moulding effectively, easily.
According to an aspect of the present invention, proposed a kind of localization method of large-scale curved whole workpiece compression moulding, comprised the steps: step 1: press-moulding die is provided, and said press-moulding die comprises mold and the bed die that is fitted to each other; Step 2: sheet material is navigated on the bed die; Step 3: utilize mold extruding to be positioned at sheet material on the bed die to form preliminary curve surface work pieces; And step 4: on said 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: said mold or bed die are provided with a plurality of labelling apparatus, and in step 3, said a plurality of labelling apparatus form a plurality of marks on preliminary curve surface work pieces; And in step 4, form said line of cut based on said a plurality of marks.
Advantageously; In said method; Said a plurality of labelling apparatus comprises a plurality of main pip devices; Said a plurality of main pip device forms a plurality of main pips on preliminary curve surface work pieces, the large-scale curved workpiece of said intended shape is positioned at said a plurality of main pip within the formed loop curve that links to each other in order on the said preliminary curve surface work pieces.
Advantageously, said preliminary curve surface work pieces is a roughly rectangular or trapezoidal shape in vertical view, and said main pip comprises four marks that are formed on said rectangle or trapezoidal bight.
Further, said sheet material is through just navigating on the bed die after the cutting, and the edge of the said sheet material of said loop curve distance has the surplus of 50-150mm.
Further; In step 4; Measurement device also is provided, and said measurement device is designated as benchmark with said a plurality of principal marks and confirms preliminary line of cut, according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.Further, the said loop curve of said preliminary line of cut distance has the surplus of 0-100mm.
Advantageously, said a plurality of labelling apparatus also comprise a plurality of aid mark devices, and said a plurality of aid mark devices form a plurality of aid marks on preliminary curve surface work pieces, and said a plurality of aid marks are formed between the adjacent main pip along said loop curve.In step 4; Measurement device also is provided; Said measurement device is that benchmark is confirmed preliminary line of cut with said a plurality of main pips and at least a portion aid mark, according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.
Further, along said loop curve, the medium position substantially between per two adjacent main pips forms at least one aid mark.Advantageously, between step 3 and step 4, also comprise step 5: lift mold, and said preliminary curve surface work pieces is placed on the support, and in step 5, according to said aid mark adjustment or the definite position of said preliminary curve surface work pieces on said support.
Advantageously; In step 4; Measurement device also is provided, and said measurement device is confirmed preliminary line of cut with said a plurality of benchmark that are labeled as, and according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.
Advantageously, above-mentioned design data comprise said intended shape large-scale curved workpiece the edge the design arc length and the design action.
In above method, advantageously, each said labelling apparatus comprises locating hole and is arranged in this locating hole to expose the mark spare of end that said mark spare forms said a plurality of marks in step 3 on said preliminary curve surface work pieces.Alternatively, said mark spare is processed by graphite or low intensity metal.
Each said labelling apparatus also can be the convexity on the pressed surface that is formed on mold or bed die.
In above method, said large-scale curved workpiece is the parts of assembly unit used in nuclear power station steel containment vessel.
In above method, the area of said sheet material is greater than 4 square metres.
Description of drawings
The present invention will come further explain with reference to accompanying drawing, wherein:
The sketch map of the localization method of Fig. 1 large-scale curved whole workpiece compression moulding according to an embodiment of the invention;
Fig. 2 is the schematic perspective view of the mold among Fig. 1, wherein shows the labelling apparatus that is arranged on the pressed surface.
The specific embodiment
Though will fully describe the present invention with reference to the accompanying drawing that contains preferred embodiment of the present invention, before this describes, should be appreciated that those of ordinary skill in the art can revise invention described herein, obtains technique effect of the present invention 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.
The localization method of describing according to the large-scale curved whole workpiece compression moulding of a kind of exemplary embodiment of the present invention with reference to Fig. 1,2 below.Fig. 1 is the sketch map of the localization method of large-scale curved whole workpiece compression moulding according to an embodiment of the invention.Fig. 2 is the schematic perspective view of the mold among Fig. 1, wherein shows the labelling apparatus 4 that is arranged on the pressed surface.Said method comprises the steps:
Step 1: press-moulding die is provided, and said press-moulding die comprises the mold 1 and bed die (not shown) that is fitted to each other;
Step 2:, navigate on the bed die with sheet material (not shown, the metallic plate of steel plate for example, or the sheet material that other can whole compression moulding);
Step 3: utilize mold 1 extruding to be positioned at sheet material on the bed die to form preliminary curve surface work pieces 2; And
Step 4: on said preliminary curve surface work pieces 2, form line of cut 21, cutting out the large-scale curved workpiece 22 of intended shape based on this line of cut 21,
Wherein:
Said mold 1 or bed die (being on the mold 1 among Fig. 1) are provided with a plurality of labelling apparatus 4; In step 3; Said a plurality of labelling apparatus 4 forms a plurality of marks 3 on preliminary curve surface work pieces 2, and in step 4, forms said line of cut 21 based on said a plurality of marks 3.
Said a plurality of labelling apparatus 4 comprises a plurality of main pip devices 41; Said a plurality of main pip device 41 forms a plurality of main pip A, B, C, D on preliminary curve surface work pieces; Referring to Fig. 1, the large-scale curved workpiece of said intended shape is positioned at said a plurality of main pip within the formed loop curve 23 that links to each other in order on the said preliminary curve surface work pieces.The position and the quantity that it should be noted that the main pip here only are schematically, as long as main pip can help to confirm line of cut 21.The large-scale curved workpiece 22 of said intended shape is positioned at said a plurality of main pip within the formed loop curve 23 that links to each other in order on the said preliminary curve surface work pieces 2.It is also to be noted that though in specific embodiment of the present invention, loop curve 23 circle cut secants 21 are provided with,, loop curve 23 also can be arranged within the line of cut 21, and perhaps, main pip also can be positioned within the line of cut 21 that is used for secondary cut.
Said preliminary curve surface work pieces 2 can be roughly rectangular in vertical view or trapezoidal shape, and said main pip comprises four marks that are formed on said rectangle or trapezoidal bight.
Said sheet material navigates on the bed die after cutting just (that is, once cutting), and the edge of the said sheet material of said loop curve 23 distances has the surplus of 50-150mm.
In step 4; Also measurement device can be provided; Said measurement device is designated as benchmark with said a plurality of principal marks and confirms preliminary line of cut, then according to the design data of the large-scale curved workpiece of intended shape to said preliminary line of cut adjust with form said line of cut (be secondary cut based on line of cut).The said loop curve of said preliminary line of cut distance has the surplus of 0-100mm.Be that loop curve itself just can form this preliminary line of cut under 0 the situation in surplus.Said design data comprise said intended shape large-scale curved workpiece 22 the edge the design arc length and the design action.
Said a plurality of labelling apparatus 4 also can comprise a plurality of aid mark devices 42; Said a plurality of aid mark device 42 forms a plurality of aid mark E-J on preliminary curve surface work pieces 2; As shown in fig. 1, said a plurality of aid marks are formed between the adjacent main pip along said loop curve.Alternatively; In step 4; Measurement device also is provided; Said measurement device is that benchmark is confirmed preliminary line of cut with said a plurality of main pips and at least a portion aid mark, according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.Advantageously, along said loop curve 23, the medium position substantially between per two adjacent main pips forms at least one aid mark.The position and the quantity that it should be noted that the aid mark here also only are schematic.
Advantageously; Between step 3 and step 4, also comprise step 5: lift mold 1, and said preliminary curve surface work pieces 2 is placed on the support (not shown); And in step 5, according to said aid mark adjustment or the definite position of said preliminary curve surface work pieces 2 on said support.For example, under aid mark and situation that the correspondence position on the support is aimed at, can assert that preliminary curve surface work pieces 2 correctly has been positioned on the support, so that carry out accurate cutting (or secondary cut) subsequently.Equally, in step 4, measurement device is provided also, said measurement device is confirmed preliminary line of cut with said a plurality of benchmark that are labeled as, and according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.Advantageously, said design data comprise said intended shape large-scale curved workpiece the edge the design arc length and the design action.
Each said labelling apparatus 4 comprises locating hole and is arranged in this locating hole to expose the mark spare of end that said mark spare forms said a plurality of marks in step 3 on said preliminary curve surface work pieces.Said mark spare is processed by graphite or low intensity metal.In locating hole, fill colored substance such as graphite or low intensity metal is installed, colored substance such as graphite or low intensive metal can stay the marking during compression moulding on workpiece, and be still high-visible after compacting finishes.
Alternatively, each said labelling apparatus 4 is the convexity on the pressed surface that is formed on mold or bed die.Perhaps, alternatively, each said labelling apparatus 4 can be the recess on the pressed surface that is formed on mold or bed die.Significantly, thus the hardness of mold or bed die should convexity or the hardness of this recess be higher than the hardness of downtrodden sheet material.
Locating hole, convexity or recess are positioned at the compact dimensions scope of curve surface work pieces, and particular location is confirmed according to shape, edge arc length and the cutting technique of the large-scale curved workpiece of final expectation.
Can be applied to 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 used for the parts of whole compression moulding assembly unit used in nuclear power station steel containment vessel.
In the present invention, the area that is used for the sheet material of whole compression moulding is preferably more than 4 square metres.
Be that example specifies the technological process according to large-scale curved workpiece compression moulding of the present invention with the large-scale curved steel plate of whole compression moulding below.This technological process comprises successively: the blanking cutting; Just locate; Compression moulding; Secondary accurately cuts.Wherein:
Blanking cutting (corresponding to the once cutting of preceding text): according to shape, size and the die size of the large-scale curved workpiece 22 of intended shape steel plate is carried out rough lumber and cut.Steel plate cutting cuts to being designed and sized to the theoretical shape camber line (or line of cut 21 of preceding text) of the large-scale curved workpiece 22 of intended shape of requirement and outwards reserves the 100mm surplus;
Just locate: steel plate is directly put to mould, and this process need not accurate location.
Compression moulding: the location of compression moulding 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 on the theoretical shape camber line (or line of cut 21 of preceding text) of product basis, leave about 30mm surplus; To guarantee that product is in the imprint area scope that forms; Wherein A, B, C, four angle points of D are the datum mark that forms line of cut 21 (or secondary cut line) after compacting is accomplished, and some E-J is that the large-scale curved workpiece 22 of intended shape is located usefulness on support.Locating hole is filled colored substance such as graphite or low intensity metal is installed, and colored substance such as graphite or low intensive metal can stay the marking during compression moulding on workpiece, and the marking A-J of formation is corresponding to the position of locating hole; This marking or mark were still high-visible after compacting finished; Find benchmark and location in the time of can being convenient for measuring like this accurately, do not need to decide again benchmark, thereby; Even steel plate has slight inclination when just beginning to place, rely on positioning reference can find anchor point very easily.
Secondary accurately cuts: after patrix lifts, preliminary curve surface work pieces 2 is lifted to support, according to the aid mark E-J adjustment that forms or the definite position of preliminary curve surface work pieces 2 on support; Utilize measurement device; Laser measuring equipment for example is that the inwardly about 30mm of benchmark place begins to measure with A, B, C, D point, and measurement device will calculate the arc length, action at measured edge etc. automatically; And finely tune according to the comparative result of measurement data and gross data; Rule thereby search out suitable edge, then, accurately cut based on this line.
Adopt the localization method of large-scale curved whole workpiece compression moulding of the present invention, can not influence the size behind the final steel sheet metal forming, also can guarantee the size conforms quality requirement after the steel plate compacting when raising the efficiency.Particularly, can obtain one of following technique effect at least according to the method for the invention:
(1) the localization method utilization of the patent of the present invention compacting anchor point that is set in the pressed surface on the large-scale curved board mold positions, and positions with parts such as adopting location-plate, alignment pin, pin stop, side edge and compares, and is simple to operate.
(2) localization method of patent description of the present invention, simple, easy to operate for the positioning requirements before the large-scale curved plate compacting, reduced labour intensity, improved operating efficiency.
(3) localization method described of patent of the present invention has overcome that large-scale curved plate weight is big, has produced slippage in the pressing process, blank irregularity, the influence of moving unfavorable factors such as inconvenience, can increase work efficiency.
(4) localization method of patent description of the present invention through carrying out secondary cut according to the compacting indentation again after the integral body compacting, has been guaranteed curved slab compacting precision, improves yield rate.
(5) localization method of patent description of the present invention, the accurate adjustment requirement when having reduced middle temperature moulding and high-temperature molding curved slab location is increased work efficiency.
(6) localization method of patent description of the present invention, the accurate adjustment requirement when having reduced middle temperature moulding and high-temperature molding curved slab location has improved workman's operating environment greatly, improves security.
After specifying preferred embodiment of the present invention; Those of ordinary skill in the art can clearly understand; Under protection domain that does not break away from the claim of enclosing and spirit, can carry out various variations and change, and the present invention also is not subject to the embodiment of the exemplary embodiment of lifting in the specification.
Claims (18)
1. the localization method of a large-scale curved whole workpiece compression moulding comprises the steps:
Step 1: press-moulding die is provided, and said press-moulding die comprises mold and the bed die that is fitted to each other;
Step 2: sheet material is navigated on the bed die;
Step 3: utilize mold extruding to be positioned at sheet material on the bed die to form preliminary curve surface work pieces; And
Step 4: on said preliminary curve surface work pieces, form line of cut, cutting out the large-scale curved workpiece of intended shape based on this line of cut,
Wherein:
Said mold or bed die are provided with a plurality of labelling apparatus, and in step 3, said a plurality of labelling apparatus form a plurality of marks on preliminary curve surface work pieces, and in step 4, form said line of cut based on said a plurality of marks.
2. method according to claim 1, wherein:
Said a plurality of labelling apparatus comprises a plurality of main pip devices; Said a plurality of main pip device forms a plurality of main pips on preliminary curve surface work pieces, the large-scale curved workpiece of said intended shape is positioned at said a plurality of main pip within the formed loop curve that links to each other in order on the said preliminary curve surface work pieces.
3. method according to claim 2, wherein:
Said sheet material is through just navigating on the bed die after the cutting, and the edge of the said sheet material of said loop curve distance has the surplus of 50-150mm.
4. method according to claim 3, wherein:
In step 4, measurement device also is provided, said measurement device is designated as benchmark with said a plurality of principal marks and confirms preliminary line of cut, according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.
5. method according to claim 4, wherein:
The said loop curve of said preliminary line of cut distance has the surplus of 0-100mm.
6. method according to claim 4, wherein:
Said design data comprise said intended shape large-scale curved workpiece the edge the design arc length and the design action.
7. method according to claim 2, wherein:
Said preliminary curve surface work pieces is a roughly rectangular or trapezoidal shape in vertical view, and said main pip comprises four marks that are formed on said rectangle or trapezoidal bight.
8. method according to claim 2, wherein:
Said a plurality of labelling apparatus also comprises a plurality of aid mark devices, and said a plurality of aid mark devices form a plurality of aid marks on preliminary curve surface work pieces, and said a plurality of aid marks are formed between the adjacent main pip along said loop curve.
9. method according to claim 8, wherein:
In step 4; Measurement device also is provided; Said measurement device is that benchmark is confirmed preliminary line of cut with said a plurality of main pips and at least a portion aid mark, according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.
10. method according to claim 8, wherein:
Along said loop curve, the medium position substantially between per two adjacent main pips forms at least one aid mark.
11. method according to claim 8, wherein:
Between step 3 and step 4, also comprise step 5: lift mold, and said preliminary curve surface work pieces is placed on the support, and in step 5, according to said aid mark adjustment or the definite position of said preliminary curve surface work pieces on said support.
12. method according to claim 1, wherein:
In step 4, measurement device also is provided, said measurement device is confirmed preliminary line of cut with said a plurality of benchmark that are labeled as, and according to the design data of the large-scale curved workpiece of intended shape said preliminary line of cut is adjusted to form said line of cut then.
13. method according to claim 12, wherein:
Said design data comprise said intended shape large-scale curved workpiece the edge the design arc length and the design action.
14. according to each described method among the claim 1-13, wherein:
Each said labelling apparatus comprises locating hole and is arranged in this locating hole to expose the mark spare of end that said mark spare forms said a plurality of marks in step 3 on said preliminary curve surface work pieces.
15. method according to claim 14, wherein:
Said mark spare is processed by graphite or low intensity metal.
16. method according to claim 14, wherein:
Each said labelling apparatus is the convexity that is formed on the pressed surface of mold or bed die.
17. according to each described method among the claim 1-13, wherein:
Said large-scale curved workpiece is the parts of assembly unit used in nuclear power station steel containment vessel.
18. according to each described method among the claim 1-13, wherein:
The area of said sheet material is greater than 4 square metres.
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| CN103658232A (en) * | 2012-08-30 | 2014-03-26 | 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 |
| CN105013905A (en) * | 2015-06-17 | 2015-11-04 | 沈阳飞机工业（集团）有限公司 | Technology method of overall forming of large curved surface composite material tool steel plate |
| CN112191938A (en) * | 2020-09-15 | 2021-01-08 | 南京航空航天大学 | Large sheet metal part machining method based on intelligent operation trolley |
| CN112371846A (en) * | 2020-10-22 | 2021-02-19 | 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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| CN112371846A (en) * | 2020-10-22 | 2021-02-19 | 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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| CN102554057B (en) | 2014-06-18 |
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