CN102141491A - Universal test device of bending resilience of U-shaped and V-shaped plates - Google Patents
Universal test device of bending resilience of U-shaped and V-shaped plates Download PDFInfo
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- CN102141491A CN102141491A CN 201110004340 CN201110004340A CN102141491A CN 102141491 A CN102141491 A CN 102141491A CN 201110004340 CN201110004340 CN 201110004340 CN 201110004340 A CN201110004340 A CN 201110004340A CN 102141491 A CN102141491 A CN 102141491A
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Abstract
The invention provides a universal test device of bending resilience of U-shaped and V-shaped plates, which comprises an upper die part and a lower die part. The upper die part comprises a die handle, an upper die plate, an upper pad plate, a punch retainer plate and a U-shaped punch or a V-shaped punch which are mutually connected in sequence by screws. The lower die part comprises a lower die plate, a lower pad block, a lower pad plate, a lower baffle block, a wedge, a lower retainer block, a U-shaped cavity insert block or a V-shaped cavity insert block and a locating plate which are mutually connected in sequence by screws. The tests of the bending resilience of U-shaped and V-shaped plates can be respectively realized on the device through replacing the corresponding punch and the cavity insert block. As long as the corresponding modules and the plate blanks are regulated, the universal test device can also test the influences of material properties, plate size (relative thickness and width), die geometry and technical parameters (clearance between punch and die, cavity fillet radius, bending angle, punch press quantity and friction conditions) and other factors on the bending resilience. The universal test device has the characteristics that the operation is simple and the use is convenient.
Description
Technical field
The present invention relates to a kind of universal test device that is used for plate U type and V-type bending springback in punching press field.
Background technology
In the punching production, metal blank is the certain resilience of ubiquity after the elastic-plastic deformation under the supercooled state, and this distortion usually causes adverse influence to the shape and size precision of formed thereby product, and is particularly outstanding in bending forming.The mode of bending springback and size, closely related, very complicated with properties of materials, part shape and physical dimension, shaped state (as the punch volume under pressure) and mould state numerous factors such as (as die clearance, surfaceness and lubrication circumstances).At present also more limited to the understanding of resilience, there are not theoretical analysis and predicting means accurately and reliably, existing numerical simulation technology also far can not satisfy demand on the engineering to the prediction of bending springback, in the practice to the control of bending springback can only by in a large number, repeatedly die debugging carries out inefficiency, cost height with revising.The more existing experimental provision that is used to study bending springback, function singleness can not realize the rebound characteristics test of different materials under differently curved condition mostly.
Summary of the invention
Purpose of the present invention, be to provide a kind of universal test device of metal blank bending springback, can be used for investigating under the differently curved form, factors such as plate relative thickness, material behavior, punch volume under pressure, punch and die gap, die entrance, die surface lubrication circumstances are to influence springback, for the Sheet Metal Forming Technology of plate and mould design and correlation theory research provide reference data.To achieve these goals, technical scheme of the present invention is:
Adopt a kind of rebound test device that can be used for plate U type and two kinds of representative curve form of V-type.Described device comprises upper die and lower die two parts.Wherein, the part of the upper die comprises die shank, cope match-plate pattern, upper padding plate, punch retainer, U type punch or the V-type punch that utilizes screw to be linked in sequence mutually.Die shank is the right cylinder of flanged dish, utilizes screw that the ring flange of die shank is fixed in the circular groove of cope match-plate pattern upper face center, utilizes screw successively with the upper padding plate of rectangular block shape, the lower surface that punch retainer is connected in cope match-plate pattern; U type punch and V-type punch are the rectangular bar shaped that the upper end has rectangular boss, and during use, described rectangular boss is embedded in respectively in the rectangular recess of punch retainer centre position correspondence.
The part of the lower die comprises the lower bolster that utilizes screw to be linked in sequence mutually, following block, following fixed block, wedge, lower cushion block, lower bolster, U type die plate insert or V-type die plate insert, location-plate.Described lower bolster is an elongated plates, and the end positions of upper surface is along the opening groove that laterally is processed with two square-sections, and the upper surface that is close to the opening groove between two opening grooves has two rectangle shallow slots; Following block is two rectangular blocks, and the lower end embeds respectively in the opening groove of described lower bolster, and utilizes screw to be connected with lower bolster; Two following fixed blocks are the long block of symmetrical trapezoid cross section, the bottom surface places two rectangle shallow slots of lower bolster upper surface, width is consistent with the width of lower bolster rectangle shallow slot, horizontal direction in the trapezoidal cross-section centre position is processed with two step through-holes, vertical direction is processed with two " waist " shape through holes, utilizes two screws that pass two " waist " shape through holes will descend fixed block and lower bolster to fix; Wedge is that two xsects are the up big and down small trapezoidal long block of inversion, place down respectively between block and the following fixed block, the inclined-plane of wedge fits with the inclined-plane of the trapezoid cross section of following fixed block, link to each other with lower bolster by screw, can set screw change wedge, thereby change two spacings between the following fixed block in the position of short transverse; Lower cushion block is the middle rectangular block that has horizontal rectangular through slot, utilizes screw retention between lower bolster upper surface and two following fixed blocks; Lower bolster is the strip of rectangular cross section, is positioned in the horizontal rectangular through slot of described lower cushion block; U type die plate insert is two long rectangular blocks of left and right symmetry, lay respectively between two following fixed blocks and lower cushion block on, link to each other with two following fixed blocks and lower bolster by screw, four seamed edges of described long rectangular block length direction are processed as the rounding of four kinds of different radiuss of corner, the two sides symmetric arrangement has two tapped through holes corresponding with the step through-hole of following fixed block relatively, and the centre of upper surface and bottom surface has and corresponding two stepped holes of lower cushion block threaded hole; The V-type die plate insert is two strip pieces of left and right symmetry, lay respectively between two following fixed blocks and lower cushion block on, link to each other with two following fixed blocks and lower bolster by screw, two inclined-planes of different gradients are processed on described strip piece upper surface both sides along its length, the gradient on inclined-plane is half of V-type punch bottom angle, and the centre position has two step through-holes from top to bottom.
Change corresponding punch and die plate insert, can on this device, realize the test of U type and V-type metal sheet bending springback, satisfy different test requests simultaneously:
During test U type spare bending springback, adjust the height of wedge and the horizontal level of following fixed block, can realize the bending of different in width U type spare, and the testing level gap is to influence springback; Change the lower bolster of different-thickness, can test of the influence of different punch volumes under pressure U type spare bending springback; Adjust the diverse location of die plate insert, can study of the influence of different radiuss of corner U type spare bending springback.
During test V-type part bending springback, change corresponding punch, adjust the die plate insert position simultaneously, can test of the influence of differently curved angle the V-type bending springback.
Change the blank and the size (as relative thickness, width) of different materials, the material behavior of can testing and assessing and size are to influence springback.Change state protruding, the die working surface, as be coated with and add different lubricants, can study friction influence springback.Compare with existing bending springback proving installation, the present invention has following advantage:
Can on a covering device, realize the test of sheet material U type and V-type bending springback, while test material characteristic, plate size (relative thickness, width), mould geometry and of the influence of technological parameter multiple factors such as (die profile radius, die clearance, angle of bend, punch volume under pressure, friction conditions) to bending springback, and simple, convenient quick.
Description of drawings
Fig. 1 is the main cut-open view of the present invention's (bending of U-shaped spare); Fig. 2 is the vertical view of the present invention's (bending of U-shaped spare) counterdie;
Fig. 3 is the upward view of the present invention's (bending of U-shaped spare) patrix; Fig. 4 is the main cut-open view of the present invention's (bending of V-arrangement spare);
Fig. 5 is the vertical view of the present invention's (bending of V-arrangement spare) part of the lower die;
Fig. 6 is the vertical view of lower bolster; Fig. 7 is the cut-open view of lower bolster;
Fig. 8 is the vertical view of following block; Fig. 9 is the cut-open view of following block;
Figure 10 is the wedge vertical view; Figure 11 is the cut-open view of wedge;
Figure 12 is the cut-open view of following fixed block; Figure 13 is the vertical view of following fixed block;
Figure 14 is the vertical view of lower cushion block; Figure 15 is the cut-open view of lower cushion block;
Figure 16 is the vertical view of lower bolster; Figure 17 is the cut-open view of lower bolster;
Figure 18 is a U-shaped die plate insert vertical view; Figure 19 is the cut-open view of U-shaped die plate insert;
Figure 20 is a V-arrangement die plate insert vertical view; Figure 21 is the cut-open view of V-arrangement die plate insert;
Figure 22 is the vertical view of location-plate; Figure 23 is the cut-open view of location-plate;
Figure 24 is the vertical view of U-shaped punch; Figure 25 is the front view of U-shaped punch;
Figure 26 is the vertical view of V-arrangement punch; Figure 27 is the front view of V-arrangement punch;
Figure 28 is the vertical view of punch retainer; Figure 29 is the cut-open view of punch retainer;
Figure 30 is the vertical view of upper padding plate; Figure 31 is the cut-open view of upper padding plate;
Figure 32 is the vertical view of cope match-plate pattern; Figure 33 is the cut-open view of cope match-plate pattern;
Figure 34 is the vertical view of die shank; Figure 35 is the cut-open view of die shank.
In Fig. 1 to Figure 35:
1, lower bolster 2, following block 3, wedge 4, following fixed block 5, lower cushion block 6, lower bolster 7, U-shaped die plate insert 8, location-plate 9, U-shaped punch 10, punch retainer 11, upper padding plate 12, cope match-plate pattern 13, die shank 14, screw 15, screw 16, screw 17, screw 18, screw 19, screw 20, V-arrangement punch 21, V-arrangement die plate insert
Embodiment
To be applicable to that length is 80～130mm, the U type of the metal blank of width 20～60mm, thickness 0.1～4mm and V-type bending springback proving installation are that example describes below.
Described proving installation comprises part of the upper die and part of the lower die.The part of the upper die is by the die shank that utilizes screw to be linked in sequence mutually (13), cope match-plate pattern (12), upper padding plate (11), punch retainer (10), U type punch (9) or V-type punch (20), and attachment screw, tommy are formed.Wherein, die shank (13) is the right cylinder of the flanged dish of Φ 60mm for diameter, and ring flange is evenly equipped with 4 stepped holes, and the screw of 4 M8 (14) is fixed in the circular groove of cope match-plate pattern (12) upper surface center by the ring flange of described stepped hole with die shank (13); Upper padding plate (11), punch retainer (10) are the rectangle block, are fixed on the lower surface of cope match-plate pattern (12) successively by 4 M10 screws (15); U type punch (9) and V-type punch (20) are the rectangular bar shaped that there is rectangular boss 100mm X 50mm, upper end for sectional dimension, and described rectangular boss is embedded in the corresponding rectangular recess in punch retainer (10) middle part and the lower surface of upper surface and upper padding plate (11) is fitted.U type punch (9) both sides, lower end are used for the series of values that the fillet at moulding position is got 4～15mm, and the angle α that V-type punch (20) lower end is used for the moulding position gets 30～135 ° series of values.
The part of the lower die comprises lower bolster (1), lower bolster (6), location-plate (8), U type die plate insert (7) or V-type die plate insert (21), lower cushion block (5), following fixed block (4), wedge (3), the following block (2) that utilizes screw to be linked in sequence mutually.Wherein, lower bolster (1) is an elongated plates, and length is respectively 600mm X 200mm X 50mm, and the upper surface two ends are along laterally having two lengths to be respectively
And the opening groove that the square-section of two step through-holes is respectively arranged, and length and width, be deeply
Two rectangle shallow slots, in the rectangle shallow slot and the upper surface of the lower bolster threaded hole that to be evenly equipped with 10 diameters in addition be 10mm; Following block (2) is that two lengths are
Rectangular block, the lower end embeds respectively in the opening groove of described lower bolster (1), and the screw (15) by 4 M10 is connected with lower bolster (1); Two following fixed blocks (4) are the long block of symmetrical trapezoid cross section, lay respectively in the rectangle shallow slot of lower bolster (1) upper surface, and the screw (19) by 4 M10 is connected with lower bolster (1), one side described two long blocks in the outer part big rounding all arranged; Lower cushion block (5) is horizontal rectangular through slot for the centre has, and length is respectively the rectangular block of 142mm X 100mm X 40mm, and upper surface has-and length is respectively
Groove, the screw (16) by 4 M10 is fixed between the center and two following fixed blocks (4) of lower bolster (1) upper surface; Lower bolster (6) is respectively 40mm X 120mm for the length and width of rectangular cross section, and thickness is the strip of a series of different sizes, is positioned in the rectangular through slot of described lower cushion block (5), and width is slightly smaller than the width of U type punch and V-type punch; Wedge (3) is that two xsects are the up big and down small trapezoidal long block of inversion, about laying respectively between two following blocks (2) and the following fixed block (4), the angle of inclined-plane and surface level is fitted between 75～85 ° and with the inclined-plane of following fixed block (4) trapezoid cross section, link to each other with lower bolster (1) by 4 M10 screws (19), can pass through set screw (19) and change wedge (3), thereby change the spacing between two following fixed blocks (4) in the position of short transverse; U type die plate insert (7) and V-type die plate insert (21) respectively have two of left and right symmetry, be positioned between two following fixed blocks (4) and on the lower cushion block (5), link to each other with following fixed block (4), lower cushion block (5) and lower bolster (1) with 4 M10 screws (18) by 4 M10 screws (19) respectively.Two U type die plate inserts (7) are strip, and four seamed edges of length direction are processed with the rounding of four kinds of different radiuss of corner between 4～15mm respectively, place the bending that realizes under the different die entrances by the difference that change is inserted; Two V-type die plate inserts are long rectangular block, link to each other with lower bolster (1) with lower cushion block (5) by 2 M10 screws (19) respectively, and upper surface two mutual parallel seamed edge positions are processed with the inclined-plane of different gradients between 15～67.5 °.The position of two V-type die plate inserts about change can constitute the V-type die of differently curved angle.Location-plate (8) is made by the thin plate of thickness 5mm, and length and width are respectively 100mmX 70mm, is connected the upper surface of two following fixed blocks (4) by two kidney slots, two M6 screws (17), is used for the location before the bending of different size slab material.
Change punch and corresponding with it die plate insert, in the time of can investigating the bending of plate U type and V-type, parameters such as different punch-nose angles or angle of bend are to the influence of bending springback.For example, when the crooked test of U-shaped spare, regulate the height that connects the screw (19) between wedge (3) and the lower bolster (1), fixed block (4) is horizontally slipped, obtain protruding, the die gap of different U-shaped bendings, thereby can test and assess the influence of protruding, die gap U type spare bending springback; Change the lower bolster (6) of different-thickness, can test difference and press down the influence of the degree of depth U type spare bending springback; Change the different installation sites of U-shaped die plate insert (7), the different die profile radius of the 4～15mm that can test and assess are to the influence of U type spare bending springback; When the V-type part is crooked, the angle α that the punch lower end is used for the moulding position is a series of angle of bend of 30～135 °, 15～67.5 ° of being designed to match with it of the seamed edge of die plate insert, change the different installation sites of V-type die plate insert (21), can test of the influence of differently curved angle the bending springback of V-type part.In addition, protruding, die working surface be coated with add different lubricants, change friction condition in the experiment, can study friction condition influence springback.
The present invention can use on common crank press or hydropress.In the practical operation, the upper and lower mould that at first will install partially overlaps, and integral body places on the pressing machine.Then part of the upper die and pressing machine top shoe are fixed, the part of the lower die freely is positioned on the pressing machine following table.After thin plate of counterdie placement carries out pressure testing, aligns the relative position of upper and lower mould part automatically, counterdie is fixed to be carried out formal bending again.When on hydropress, using, can take down die shank.
Claims (5)
1. the universal test device of a plate U-V type bending springback; comprise upper die and lower die two parts; it is characterized in that: the part of the upper die comprises die shank, cope match-plate pattern, upper padding plate, punch retainer, U type punch or the V-type punch that utilizes screw to be linked in sequence mutually, and the part of the lower die comprises the lower bolster that utilizes screw to be linked in sequence mutually, following block, wedge, following fixed block, lower cushion block, lower bolster, U type die plate insert or V-type die plate insert, location-plate.
2. the universal test device of plate U-V type bending springback according to claim 1, it is characterized in that: die shank is the right cylinder of flanged dish, utilizes screw that the ring flange of die shank is fixed in the circular groove of cope match-plate pattern upper face center; The upper padding plate of rectangular block shape, punch retainer are connected in the lower surface of cope match-plate pattern successively by screw; U type punch and V-type punch are respectively the rectangular bar shaped that the upper end has rectangular boss, and described rectangular boss is embedded in the rectangular recess of punch retainer centre position correspondence.
3. the universal test device of plate U-V type bending springback according to claim 1, it is characterized in that: lower bolster is an elongated plates, the position at elongated plates upper surface two ends is along the opening groove that laterally is processed with two square-sections, the upper surface between two opening grooves, is close to the opening groove two rectangle shallow slots are arranged; Following block is two rectangular blocks, and the lower end embeds respectively in the opening groove of described lower bolster, and utilizes screw to be connected with lower bolster; Two following fixed blocks are the long block of symmetrical trapezoid cross section, the bottom surface places two rectangle shallow slots of lower bolster upper surface, width is consistent with the width of lower bolster rectangle shallow slot, horizontal direction in the trapezoidal cross-section centre position is processed with two step through-holes, vertical direction is processed with two " waist " shape through holes, and utilizes two screws that pass two " waist " shape through holes will descend fixed block and lower bolster to fix; Wedge is that two xsects are the trapezoidal long block of up big and down small inversion, places down respectively between block and the following fixed block, and the inclined-plane of wedge fits with the inclined-plane of the trapezoid cross section of following fixed block, and links to each other with lower bolster by screw; Lower cushion block is the middle rectangular block that has horizontal rectangular through slot, utilizes screw retention between lower bolster upper surface and two following fixed blocks; Lower bolster is the strip of rectangular cross section, places the horizontal rectangular through slot of lower cushion block.
4. the universal test device of plate U-V type bending springback according to claim 1, it is characterized in that: U type die plate insert is two long rectangular blocks of left and right symmetry, lay respectively between two following fixed blocks and lower cushion block on, link to each other with two following fixed blocks and lower bolster by screw; Four seamed edges of described long rectangular block length direction are processed as the rounding of four kinds of different radiuss of corner, the two sides symmetric arrangement has two tapped through holes corresponding with the step through-hole of following fixed block relatively, and the centre of upper surface and bottom surface has and corresponding two stepped holes of lower cushion block threaded hole.
5. the universal test device of plate U-V type bending springback according to claim 1, it is characterized in that: the V-type die plate insert is two strip pieces of left and right symmetry, lay respectively between two following fixed blocks and lower cushion block on, link to each other with two following fixed blocks and lower bolster by screw; Two inclined-planes of different gradients are processed on described strip piece upper surface both sides along its length, and the gradient on inclined-plane is half of V-type punch bottom angle, and the centre position has two step through-holes from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110004340 CN102141491A (en) | 2011-01-11 | 2011-01-11 | Universal test device of bending resilience of U-shaped and V-shaped plates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110004340 CN102141491A (en) | 2011-01-11 | 2011-01-11 | Universal test device of bending resilience of U-shaped and V-shaped plates |
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| CN 201110004340 Pending CN102141491A (en) | 2011-01-11 | 2011-01-11 | Universal test device of bending resilience of U-shaped and V-shaped plates |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926155A (en) * | 2014-04-30 | 2014-07-16 | 重庆市科学技术研究院 | Method for testing bending and forming properties of magnesium alloy plate |
| CN104062183A (en) * | 2014-06-12 | 2014-09-24 | 武汉钢铁(集团)公司 | Plate forming resilience tester |
| CN105855403A (en) * | 2016-06-20 | 2016-08-17 | 昆山安泰美科金属材料有限公司 | Planeness shaping mold |
| CN109351862A (en) * | 2018-11-01 | 2019-02-19 | 上海工程技术大学 | A kind of U/L type bending die and bending method can shape more curved radius radiuses |
| CN109465314A (en) * | 2018-11-01 | 2019-03-15 | 上海工程技术大学 | A kind of sheet metal bending analysis of forming technique test platform and technological parameter test method |
| CN109466107A (en) * | 2017-09-07 | 2019-03-15 | 日本电产株式会社 | Die holder seat surface fixture |
| CN109773053A (en) * | 2019-03-20 | 2019-05-21 | 安徽省矿业机电装备有限责任公司 | A kind of adjustable bending die |
| CN111307631A (en) * | 2020-04-10 | 2020-06-19 | 中广核三角洲（太仓）检测技术有限公司 | Method and device for testing anti-resilience performance of nose pressing strip for mask |
| CN111633115A (en) * | 2020-06-05 | 2020-09-08 | 湖南大学 | Die structure of plate resilience experiment capable of realizing switching of various stamping processes |
| CN112067544A (en) * | 2020-09-30 | 2020-12-11 | 重庆鸽牌电线电缆有限公司 | Method for detecting nasal splint of mask |
| CN112345379A (en) * | 2020-09-02 | 2021-02-09 | 中国第一汽车股份有限公司 | Testing device and testing method for bending resilience characteristic of plate |
| CN112557131A (en) * | 2019-09-10 | 2021-03-26 | 宝山钢铁股份有限公司 | Method for analyzing and evaluating wear galling of metal surface and insert thereof |
| CN113063674A (en) * | 2021-03-23 | 2021-07-02 | 重庆大学 | Method and device for observing bending failure process of metal material by gradient curvature method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926155A (en) * | 2014-04-30 | 2014-07-16 | 重庆市科学技术研究院 | Method for testing bending and forming properties of magnesium alloy plate |
| CN104062183A (en) * | 2014-06-12 | 2014-09-24 | 武汉钢铁(集团)公司 | Plate forming resilience tester |
| CN105855403A (en) * | 2016-06-20 | 2016-08-17 | 昆山安泰美科金属材料有限公司 | Planeness shaping mold |
| CN109466107A (en) * | 2017-09-07 | 2019-03-15 | 日本电产株式会社 | Die holder seat surface fixture |
| CN109351862A (en) * | 2018-11-01 | 2019-02-19 | 上海工程技术大学 | A kind of U/L type bending die and bending method can shape more curved radius radiuses |
| CN109465314A (en) * | 2018-11-01 | 2019-03-15 | 上海工程技术大学 | A kind of sheet metal bending analysis of forming technique test platform and technological parameter test method |
| CN109773053A (en) * | 2019-03-20 | 2019-05-21 | 安徽省矿业机电装备有限责任公司 | A kind of adjustable bending die |
| CN112557131A (en) * | 2019-09-10 | 2021-03-26 | 宝山钢铁股份有限公司 | Method for analyzing and evaluating wear galling of metal surface and insert thereof |
| CN111307631A (en) * | 2020-04-10 | 2020-06-19 | 中广核三角洲（太仓）检测技术有限公司 | Method and device for testing anti-resilience performance of nose pressing strip for mask |
| CN111633115A (en) * | 2020-06-05 | 2020-09-08 | 湖南大学 | Die structure of plate resilience experiment capable of realizing switching of various stamping processes |
| CN112345379A (en) * | 2020-09-02 | 2021-02-09 | 中国第一汽车股份有限公司 | Testing device and testing method for bending resilience characteristic of plate |
| CN112067544A (en) * | 2020-09-30 | 2020-12-11 | 重庆鸽牌电线电缆有限公司 | Method for detecting nasal splint of mask |
| CN113063674A (en) * | 2021-03-23 | 2021-07-02 | 重庆大学 | Method and device for observing bending failure process of metal material by gradient curvature method |
| CN113063674B (en) * | 2021-03-23 | 2022-06-17 | 重庆大学 | Method and device for observing bending failure process of metal material by gradient curvature method |
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Application publication date: 20110803 |