CN100563865C - Combined shaping mold - Google Patents

Combined shaping mold Download PDF

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CN100563865C
CN100563865C CN 200810300739 CN200810300739A CN100563865C CN 100563865 C CN100563865 C CN 100563865C CN 200810300739 CN200810300739 CN 200810300739 CN 200810300739 A CN200810300739 A CN 200810300739A CN 100563865 C CN100563865 C CN 100563865C
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mold
core
lower
mandrel
die
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CN101244443A (en
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志 刘
刘志颖
宋树康
曾祥东
邓林涛
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二重集团(德阳)重型装备股份有限公司
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Abstract

本发明公开了一种用于制作弯管的组合成型模具,可满足形位尺寸要求高的弯管制作要求。 The present invention discloses a composition for a mold making elbow, can meet the high requirements of the elbow-shaped slot size production requirements. 该组合成型模具包括上模、下模和芯模,芯模采用金属制作,芯模填充管体内空间的填充率大于95%。 The mold comprises a combination of an upper mold, the lower mold and the core mold, the core mold is made of metal, the filling tube mandrel body space filling rate greater than 95%. 该模具不仅可以满足形位尺寸要求高的弯管制作的技术要求,同时与机加工的此类弯管相比,其管体的金属组织和性能可以得到更加有效的保证,同时还降低了机加工难度,金属切削量少,毛坯件重量减少,弯管的弯曲部位不圆度、弯曲背弧减薄量、名义壁厚、最小壁厚等都能很好的保证,同时还可减小弯曲部位的竹节和皱褶现象,可广泛的用于各种对形位尺寸要求高的弯管的制作。 The mold not only meet the high technical requirements of the elbow-shaped slot size requirements made, while machining and bending such comparison, its microstructure and properties of a metal pipe body can be more effectively guaranteed, while also reducing machine processing difficulty, less metal cutting, the weight reduction of the blank, bending the bending portion roundness, bending the backing thickness reduction, the nominal wall thickness, the minimum wall thickness can be well guaranteed, while also reducing the bending parts of bamboo and the phenomenon of wrinkles, can be widely used in the production of various high-shaped slot size required bend.

Description

组合成型模具 Combination of mold

技术领域 FIELD

本发明涉及一种制作弯管的模具,尤其是涉及一种用于制作形位尺寸要求高的弯管的组合成型模具。 The present invention relates to a mold for making a bend, in particular directed to a combination of a high manufacturing mold shaped slot size required for bending. 背景技术 Background technique

随着技术的进步,在一些重大的工程中,需要制作一些形位尺寸要求高的零部件,例如新设计的第三代先进大型AP1000压水堆核电站中主管道热段弯管等。 As technology advances, the number of major projects, it is necessary to make some high parts of the shape and position size requirements, such as large-scale third-generation AP1000 advanced pressurized water reactor nuclear power plant in the new design of the main pipe hot leg pipe and so on. 该主管道热段弯管由原来的不锈钢分段铸件(直管采用离心铸造和弯头采用普通铸造)焊接改成不锈钢整锻带管嘴一体化,并将分段的直管、弯头、管嘴设计成了一体化锻件,加大了制造的难度。 The hot leg bend main duct segment from the original stainless steel casting (centrifugal casting and straight pipe elbow ordinary cast) steel welded into an integrated whole forging with a nozzle, and the straight pipe segments, elbows, nozzle designed as an integrated forging, increasing the difficulty of manufacture. AP1000反应堆目前还没有在建机组,我国率先起动这一机型,主管道热段弯管也要求是整锻式并带管嘴,因形状复杂,制造难度非常大,提供的制造方案是整体锻造后用机械加工的方法加工而成。 AP1000 reactor has not yet under construction units, the first country starting this model, said hot section also requires that the competent elbow and whole-forged with a nozzle, due to the complex shape is very difficult to manufacture large, providing manufacturing solutions is the overall forging after machining method with processing. 锻件所需的不锈钢锭达到150吨,而且,管内孔几乎难于用机械的方法加工而成,锻件的组织和性能也难于保证。 Forging steel ingot required 150 tons, and the tube bore is made almost difficult to process by mechanical structure and properties is also difficult to ensure forging.

目前国内外对AP1000主管道热段弯管都还没有成熟的制造技术,它是超低碳不锈钢大锻件(316LN),类似的产品世界上都很少,因此,在冶炼、锻造、弯曲成型、机加工等工序上都有较多的技术难点。 In present the AP1000 main pipe hot leg bends are not yet mature manufacturing technology, it is a low carbon stainless steel large forgings (316LN), are rarely similar products in the world, therefore, in smelting, forging, bending, the other machining processes have technical difficulties more. 热段弯管一端直管长度2235 mm,另一端直管长度1234 mm,中间为1.5D弯曲半径弯管,并在靠近弯曲部位处有两个一体化管嘴如图1〜4所示。 Hot leg pipe elbow end of the straight length 2235 mm, the other end of the straight pipe length 1234 mm, intermediate radius of elbow bend to 1.5D, and has two bent at a portion near the nozzle integration ~ 4 as shown in FIG. 该热段弯管的外径为952.5mm,内径为787. 4mm,弯曲段的弯曲角度为56. 4° ,其技术要求是:弯曲部位不圆度《4%,弯曲背弧减薄量《12.5%,名义壁厚82. 55mm,最小壁厚72.2mm。 The outer diameter of the hot leg elbow 952.5mm, the inner diameter of 787. 4mm, the bending angle of the bending section of 56. 4 °, technical requirements are: curved portion roundness "4%, bending the backing thickness reduction" 12.5%, the nominal wall thickness of 82. 55mm, minimum wall thickness of 72.2mm.

上述热段弯管加工成型的技术难点在于: Technical difficulties the heat molding process is that elbow sections:

1、弯曲半径为1.5D两端带直管的弯曲。 1, with a bending radius of the bent ends 1.5D straight pipe.

弯头的弯曲半径为1D〜1.5D,两端不带直管段,弯管才带直管段。 Elbow bend radius is 1D~1.5D, ends without straight pipe, bent pipe with only straight pipe. 弯头的制造工艺有两种, 一是压制成型,二是热推制成型。 There are two elbow manufacturing process, first, press molding, and second, to push the heat molding. 弯管的制造工艺是中频感应加热弯管,弯管的弯曲半径一般》3D,若弯曲半径小于3D,弯曲部位的椭圆度和减薄量会激烈增大,当弯曲半径为1.5D时,弯管背弧的减薄量高达25%,椭圆度^15%。 Manufacturing process is a medium-frequency induction heating elbow bend, the bending radius of the bend is generally "3D, if the bending radius is smaller than 3D, ovality and thickness reduction of the bent portion will be heated increases, when the bending radius is 1.5D, curved the amount of thinning of the arc tube back up to 25%, 15% ovality ^.

模压成型弯头,它的坯料的轮廓形状是梯形。 Molding elbow, its outline shape is a trapezoid blank. 梯形底边长度为弯头外弧线的展开长度, 梯形顶边长度为弯头内弧线的展开长度。 Length bottom of the trapezoid of the elbow outer arc developed length, the length of the trapezoidal top edge of the arc length of the bend to expand. 弯曲成型时,坯料在内外模的作用下弯曲成型。 When bending the blank mold under the action of internal and external bending. 图10是1.5D长半径弯头压制成型原理图,图11是1.5D长半径弯头坯料图。 FIG 10 is a press-formed 1.5D long radius elbow diagram, FIG. 11 is a long radius elbow blank 1.5D FIG. 图10中所示的是是弯头压制成型的常用工艺,这种弯管方式,它的芯模填充管体内空间的填充率一般只有80%左 Yes elbow conventional press molding process shown in FIG. 10, this way bend, its filling tube mandrel body space filling rate typically only about 80%

右,这里的填充率为芯模体积与管内空间体积之比。 Right, where the filling rate of the core mold and the inner volume of the space volume ratio of the tube. 因此,产品弯曲部位的椭圆度大约有15%,同时由于弯曲段芯模之间的间隙较大,弯管的弯曲部位容易出现竹节和皱褶。 Accordingly, the bent portion of the ellipse of the product is about 15%, while the gap between the curved section of larger mandrel, the curved portion of the elbow and bamboo prone to wrinkles.

两边带直管后,坯料就不能制作成梯形,只能做成直管形状。 After the tube with straight sides, the blank can not be made into a trapezoidal shape, a straight pipe shape can be made. 弯曲时内弧金属只能压縮,外弧金属只能拉伸,当不采取措施时,外弧的减薄高达33%。 The only metal bending arc compression, arc metal outer can stretch, when no measures are taken, thinning the outer arc of up to 33%. 因此,两端带直管且弯曲半径1?=1. 5D的弯管的弯曲难度很大。 Accordingly, both ends of the straight tubes and curved with a radius? = 1 large curved elbow difficult. 5D is.

2、靠近弯曲部位处分别带有两个管嘴。 2, respectively, at close to the bent portion with two nozzles.

管嘴与弯管一体化后,给压制模具的设计增加了很大难度,而且使成型时内管嘴部位的金属得不到均匀压缩,不对称的外管嘴部位阻止了拉伸时金属的流动补充。 After integration nozzle elbow, to press mold design increases very difficult, and the metal portion of the nozzle when no uniform compression molding, asymmetrical outer portion of the nozzle prevents the stretching of metal supplementary flow.

另外,在船舶制造、冶金、化工等行业中,也会遇到一些类似的对形位尺寸要求高的弯管的制作难题。 In addition, shipbuilding, metallurgy, chemical industry, will encounter some similar problems of high production size requirements of shape and position of the elbow.

发明内容 SUMMARY

本发明所要解决的技术问题是提供一种满足形位尺寸要求高的弯管制作的组合成型模具 The present invention solves the technical problem is to provide a satisfying combination of high dimensional requirements of shape and position of the bend produced mold

本发明解决其技术问题所采用的技术方案是:组合成型模具,包括上模、下模和芯模, 芯模采用金属制作,其特征是:芯模填充管体内空间的填充率大于95%,其中,填充率为芯模体积与管内空间体积之比;芯模包括多块上芯模、多块下芯模和多个楔子,楔子设置于上芯模与下芯模之间且楔子的宽度与管体内孔的直径相适配,楔子的轴线处于管体内孔的轴线上,上芯模、下芯模和楔子的数量相等,位置对应处的上芯模、下芯模和楔子在管体内孔轴线上的长度相适配。 The present invention solves the technical problem using the technical solution: a combination of mold, comprising an upper mold, the lower mold and the core mold, the core mold is made of metal, characterized in that: the core mold fill tube body space filling rate greater than 95%, wherein the volume filling rate of the core mold and the inner space of the pipe volume ratio; mandrel comprises a plurality of upper mandrel, a plurality of lower core die and a plurality of wedges, a wedge disposed in the wedge and the width between the upper mold and the lower core mold core the diameter of the tubular body is adapted to the hole axis of the wedge in the axial bore of the tubular body, an equal number of core mold, the mandrel and the wedge, at a position corresponding to the mandrel, the mandrel and a lower wedge in the tubular body the length in the axial bore adapted.

作为优先的技术方案,芯模填充主管道热段弯管的管体的管内空间的体积为97. 5%。 As a preferred aspect, the volume of the space of the inner tube filled with the core mold hot section of main duct elbow pipe is 97.5%. 上述技术方案中,弯曲段下芯模包括凸型下芯模和凹型下芯模,凸型下芯模的肩部平面上设置有轴向的凸块,凹型下芯模的肩部平面上设置有轴向的凹槽,相邻的凸型下芯模与凹型下芯模的肩部平面相互平面接触且凸块与凹槽配合形成周向定位结构;多块凸型下芯模和凹型下芯模间隔叠置排列且叠置后的长度与管体的弯曲段的内孔轴线弧长相适配。 In the above technical solution, the mandrel comprising a curved segment convex lower core lower core die and the female die, provided with an axial projection on convex lower core die plane shoulder, the shoulder is provided on the lower mandrel concave plane axial grooves, the shoulder plane adjacent convex core die and the core die of the concave lower planar contact with each other with the recess and projection are formed with a circumferential positioning mechanism; the plurality of the male die and the female die mandrel spacer stacked arrangement within the arc length of the curved section of the bore axis and the length of the laminated tubular body adapted.

作为对上述技术方案的进一步优化,多块弯曲段下芯模之间设置有周向定位结构。 As a further optimization of the above technical solution, provided between the plurality of lower core mold curved section with a circumferential positioning mechanism. 进一步的是,上述弯曲段下芯模包括凸型下芯模和凹型下芯模,凸型下芯模的肩部平面上设置有轴向的凸块,凹型下芯模的肩部平面上设置有轴向的凹槽,相邻的凸型下芯模与凹型下芯模的肩部平面相互平面接触且凸块与凹槽配合形成周向定位结构;多块凸型下芯模和凹型下芯模间隔叠置排列且叠置后的长度与管体的弯曲段的内孔轴线弧长相适配。 Further, the lower section of the bending mold comprising a core mold core and female mold core disposed on the convex lower plane of the lower core die shoulder under axial convex bump, is provided on the concave lower planar shoulder portion of the mandrel axial grooves, the shoulder plane adjacent convex core die and the core die of the concave lower planar contact with each other with the recess and projection are formed with a circumferential positioning mechanism; the plurality of the male die and the female die mandrel spacer stacked arrangement within the arc length of the curved section of the bore axis and the length of the laminated tubular body adapted.

本发明的有益效果是:由于芯模填充管体内空间的填充率大于95%,不仅可以满足形位 Advantageous effect of the invention is: Since the core mold fill tube body space filling rate greater than 95%, not only meet the geometric

尺寸要求高的弯管制作的技术要求,同时与机加工的此类弯管相比,其管体的金属组织和性能可以得到更加有效的保证,同时还降低了机加工难度,金属切削量少,毛坯件重量减少, 弯管的弯曲部位不圆度、弯曲背弧减薄量、名义壁厚、最小壁厚等都能很好的保证,同时还可减小弯曲部位的竹节和皱褶现象,可广泛的用于各种对形位尺寸要求高的弯管的制作。 Production requires high dimensional bending technical requirements, simultaneously with machining such elbow compared to their structure and mechanical properties of the tubular body can be more effectively guaranteed, while also reducing the difficulty of machining, metal cutting less , blank weight loss, curved bend portion roundness, bending the backing thickness reduction, the nominal wall thickness, the minimum wall thickness can be well guaranteed, but can also reduce the bending portion and wrinkles bamboo phenomenon, can be widely used in the production of various high-shaped slot size required bend. 附图说明 BRIEF DESCRIPTION

图l是采用本发明的模具制作的一种反应堆主管道热段弯管的主视图。 Figure l is a view of a reactor using the master mold produced according to the present invention, the main conduit section of the thermal bend.

图2是图1中沿A—A方向的剖视图。 FIG 2 is a sectional view in a direction of A-A in FIG. 图3是图1中沿B—B方向的剖视图。 FIG 3 is a sectional view of FIG. 1 along direction B-B.

图4是采用本发明的模具制作的另一种结构形式的反应堆主管道热段弯管的主视图。 Figure 4 is a front view of the mold of the present invention made a further structure of the hot section of the reactor main duct elbow. 图5是制作图1的反应堆主管道热段弯管的管坯的主视图。 FIG 5 is a front view of a thermal reactor main duct segment 1 made of the elbow tube. 图6是制作图4的反应堆主管道热段弯管的管坯的主视图。 FIG 6 is a tube reactor made main duct 4 bends the hot section of the front view. 图7是本发明的采用组合成型模对弯度段进行成型加工的示意图。 FIG 7 is a schematic diagram of the camber mold segments forming a combination of the invention employed. 图8是沿图7中C一C方向的剖视图。 FIG 8 is a sectional view taken along a C 7 C direction.

图9是图7中凸型下芯模和凹型下芯模的配合关系分解示意图。 FIG 9 is a convex lower core lower core die 7 and the female mold exploded view of mating relationship.

图10是常用弯头压制成型原理图。 FIG 10 is a schematic diagram of conventional elbow press molding.

图ll是l. 5D长半径弯头坯料图。 Fig ll is a l. 5D long radius elbow blank of FIG.

图中标记为:弯曲段l、直管段2、管嘴3、上模4、下模5、楔子6、直管段上芯模7、弯曲段上芯模8、直管段下芯模9、弯曲段下芯模IO、凸型下芯模101、凹型下芯模102、肩部平面ll、直线段墙面12,凹腔13、凸块14、凹槽15。 FIG labeled as: curved segment L, the straight pipe 2, the nozzle 3, the upper mold 4, the lower die 5, the wedge 6, the upper section of the mandrel 7 the straight tube, the mandrel curved section 8, the mandrel 9 lower straight pipe, bent IO lower mandrel, the mandrel 101 convex, concave lower mandrel 102, the shoulder plane ll, straight wall section 12, cavity 13, protrusion 14, the recess 15.

具体实施方式 Detailed ways

下面结合附图和实施例对本发明进一步说明。 The present invention is further described below in conjunction with the accompanying drawings and embodiments.

如图1〜图9所示,本发明的组合成型模具,包括上模4、下模5和芯模,芯模采用金属制作,从而能够方便的从管坯的直管装入以及方便的从弯管后的管体弯曲段中脱模;芯模填充管体内空间的填充率大于95%,最好达到97.5%,其中,填充率为芯模体积与管内空间体积 1 ~ FIG. 9, the compositions of the present invention the mold comprises an upper mold 4, the lower die 5 and mandrel, the mandrel is made of metal, can be conveniently loaded from the tube and the straight tube convenient from the curved segments bend tube release member; filling factor of the tubular body mandrel filling space greater than 95%, preferably up to 97.5%, wherein the mold filling rate of the core pipe space volume to volume

之比。 Ratio. 这样就可进一步保证在模压成型时使其成型压力能够均匀传递,便于金属的均匀流动,同时也可保证产品的圆度要求、减薄量等形位尺寸的技术要求。 This would further ensure that they press molding at a molding pressure can be uniformly transferred, to facilitate uniform flow of the metal, while also ensuring circularity of the product requirements, technical requirements thinning amount of shape and position dimensions.

为了满足芯模填充管体内空间的填充率大于95%,可以采用多种结构形式。 In order to meet the filling tube mandrel body space filling rate greater than 95%, variety of structural forms may be employed. 例如,上述芯模包括多块上芯模、多块下芯模和多个楔子6构成,上芯模、下芯模的数量越多,越能保证芯模填充主管道热段弯管的管体的管内空间的体积大于95%,从而达到管体的弯曲段的不圆度、弯曲背弧减薄量等的技术要求。 For example, the core module comprises a plurality of upper mandrel, and a plurality of lower core die 6 composed of a plurality of wedges, the mandrel, the more the number of the mandrel, the mandrel can guarantee filling of the main duct heat pipe bend segment the volume of the inner space of the tubular body is greater than 95%, to achieve the roundness of the bent section of the tubular body, thinning amount of the bending arc back and other technical requirements. 楔子6设置于上芯模与下芯模之间且楔子6的宽度与管体内孔的直径相适配,楔子6的轴线处于管体内孔的轴线上,用于楔紧和退出芯模。 Wedge 6 is provided between the upper mold and the lower core mold core and wedge width to diameter of the pipe body is adapted to the hole 6, the axis of the wedge 6 is on the axis of the tubular body bore for wedging and exit mandrel. 上芯模、下芯模和楔子6的数量相等,位置对应处的上芯模、下芯模和楔子6在管体内孔轴线上的长度相适配,从而使其不会在弯管时相互干扰,并保证管体的弯曲段的平整光滑。 On the mandrel, the mandrel 6 and an equal number of wedges, the mandrel at the position corresponding to the lower core die 6 and a wedge on the pipe length is adapted to the body bore axis, so that it does not bend at each interference, and to ensure smooth curved section of pipe body.

由于弯管包括了直管段2和弯管段1,因此,上芯模包括直管段上芯模7和弯曲段上芯模8 ,直管段上芯模7的长度与对应管体的直管段2的长度匹配,多块弯曲段上芯模8叠置排列且 Since the elbow comprises a straight pipe 2 and the pipe bend segment 1, and therefore, the core mold comprises a core mold straight sections 7 and the core mold curved section 8, the straight tube straight pipe upper mandrel a length corresponding to the tubular body 7 2 matches the length, a plurality of curved segments arranged superposed on the mandrel 8 and

叠置后的长度与管体的弯曲段l的内孔壁弧长相适配,从而保证管体的弯曲段内圆弧的平整光滑;下芯模包括直管段下芯模9和多块弯曲段下芯模10,直管段下芯模9的长度与对应管体的直管段2的长度匹配,多块弯曲段下芯模10叠置排列且叠置后的长度与管体的弯曲段1的内孔轴线弧长相适配,从而使成型后的弯管轴向弧形好,减小竹节样缺陷,即表面平整光滑。 L curved section after the overlap length of the tube wall of the bore of the arc length adapted to ensure the formation of a curved arc tube segment smooth; lower core die comprises a lower core die straight pipe pieces and curved sections 9 lower core die 10, the straight pipe section of the lower core die straight pipe length corresponding to the tubular body 9 matches the length of 2, a plurality of curved sections of the lower core die 10 are stacked arrangement of curved segments after and overlap length of the tubular body 1 the arc length of the bore axis is adapted so that the axial direction of the arcuate bend after molding is good, bamboo-like defects is reduced, i.e., smooth surface.

为了防止在弯管时,相邻弯曲段下芯模10之间发生圆周方向的相对移动,从而造成弯管缺陷,在多块弯曲段下芯模10之间设置有周向定位结构。 In order to prevent bending during a relative movement occurs between the circumferential direction of the lower bent section 10 adjacent to the mandrel, thereby causing defects elbow provided with a circumferential positioning mechanism between the plurality of curved sections 10 of the lower core mold.

多块弯曲段下芯模10之间设置的周向定位结构,可以采用在相邻弯曲段下芯模10之间设置轴向的销、孔配合结构等来实现,还可以采用其他的类似结构,但为了使管体的弯曲段l 的表面更加平整光滑,可以采用如下结构: 10 is provided between the plurality of curved segments mandrel circumferential positioning structure may be employed provided axially between the curved section 10 of the lower core die pin holes adjacent mating structure implemented in other similar structures may also be employed However, in order to make the surface of the curved tube section l is more smooth, a structure may be employed:

弯曲段下芯模10由多块凸型下芯模101和凹型下芯模102组成,凸型下芯模101的肩部平面11上设置有轴向的凸块14,凹型下芯模102的肩部平面11上设置有轴向的凹槽15,相邻的凸型下芯模IOI、凹型下芯模102的肩部平面11相互平面接触且凸块14与凹槽15配合,多块凸型下芯模IOI、凹型下芯模102间隔叠置排列且凸块14与凹槽15配合形成周向定位结构;多块凸型下芯模101和凹型下芯模102间隔叠置排列后的长度与管体的弯曲段1的内孔轴线弧长相适配。 The curved section 10 of the mandrel plurality of convex lower core lower core die 101 and female die 102 composed of convex 11 is provided on the lower core die 101 has a planar shoulder portion of the axial projection 14, the concave lower mandrel 102 15 is provided with shoulder axial grooves 11 on the plane, the adjacent convex lower core die IOI, concave lower mandrel 102 each shoulder planar contact plane 11 and the projection 14 mating with the recess 15, a plurality of projections type lower core die IOI, concave lower mandrel 102 and are arranged spaced stacked bumps 14 and recesses 15 cooperate to form a circumferential positioning mechanism; plurality of convex lower core lower core die 101 and female die 102 are arranged spaced superposed after the arc length of the curved section of a bore axis the length of the tubular body adapted. 多块凸型下芯模i01、凹型下芯模102的上述叠置排列, 一是对整个芯模起周向定位作用,即整个芯模中相邻的部件不会发生圆周方向的相对移动;二是在成型过程中,相邻的凸型下芯模IOI、凹型下芯模102之间仅是在平面接触的肩部平面上滑动但不脱离平面接触,相邻的凸型下芯模IOI、凹型下芯模102之间形成的间隙被凸块14与凹槽15的配合结构分成了三段不在同一横截面上的小块间隙,使成型后的弯管轴向弧形好,进一步消除竹节样缺陷,使其表面更加平整光滑。 A plurality of lower core die I01 convex, concave lower core die 102 stacked above arrangement, first, the entire mandrel acts circumferentially positioned so that the entire core member adjacent the mold does not occur in the circumferential direction of the relative movement; Second, during the molding process, the adjacent convex lower core die IOI, only sliding plane on the shoulder of the contact between the concave lower mold core 102 without departing from the planar contact, adjacent convex lower core die IOI , a gap is formed between the lower mandrel 102 is concave protrusion 14 and the recess 15 of the mating structure divided into three sections of small gaps not in the same cross section, so that after forming the axial arcuate elbow well, further eliminating bamboo-like defects on its surface more smooth.

为了保证产品的圆度要求,下模5两侧为直线段墙面12,上模4插入到下模5的直线段墙面12之间,上模4的宽度与下模5两侧的直线段墙面12之间的宽度相适配。 In order to ensure the roundness of the product requirements, both sides of the lower die 5 straight wall segments 12, the upper mold 4 is inserted into the straight segment wall 5 between the lower mold 12, the straight line width of the lower die 5 on both sides of the mold 4 width between the wall segments 12 adapted. 这样,使其管体的弯曲段l从管坏的直管开始,在整个弯曲成型的过程中都能够得到护圆保护。 Thus, the tubular body so that the curved segment l from the tube straight tube bad start, during the entire bending can be obtained in both the protective guard circle. 实施例l:本发明的组合成型模具,用于制作图f图3所示的反应堆主管道热段弯管,该弯管的管体上的弯曲段1的弯曲半径R^.5D,在弯曲段1两端设置有直管段2,直管段2上靠近弯曲段1的部位设置的两个管嘴3,两个管嘴3分别设置在弯曲段1两端的直管段2上,两个管嘴3的轴线不在同一平面上,D为管体外径。 Example l Embodiment: mold compositions of the present invention, the thermal reactor main duct section for making elbow shown in FIG. 3 f, the curved section of the tubular body of the elbow bend radius of R 1 ^ .5D, bending 1 are provided at both ends of the straight pipe section 2, two straight-tube portion of the nozzle close to the curved section is provided on a segment 23, two nozzles 3 are disposed in the straight pipe section bent at both ends of an upper 2, two nozzles axis 3 is not in the same plane, D is the outer diameter of the tubular body. 管体采用超低碳不锈钢制作的整体锻件的一体结构,按照管体的各部分结构外形制作出直管状的管坯。 One-piece structure integral tube of ultra-low carbon stainless steel forging, production of a tube in accordance with the straight portions of the tubular shape of the tubular body structure. 采用本发明的组合成型模具对管坯进行加工,芯模填充管体内空间的填充率为95%,上模4和下模5上设置有与管体上的管嘴3的位置和大小相适配的凹腔13。 The present invention is a combination of tube molding die machining, the filling tube mandrel body space filling rate was 95%, the upper mold 4 and the lower die 5 is provided with a position and size of the nozzle and the tubular body 3 with appropriate with the cavity 13. 弯曲段l通过模压成型,直管段2和管嘴3采用机加工成型。 L molding by curved sections, the straight sections 2 and 3 using the nozzle forming machining. 加工后对产品进行测试,满足设计要求。 To test the product after processing, to meet the design requirements.

实施例2:本发明的组合成型模具,用于制作图4所示的反应堆主管道热段弯管,该弯管的管体上的弯曲段1的弯曲半径I^1.5D,在弯曲段1两端设置有直管段2,直管段2上靠近弯曲段1的部位设置的两个管嘴3,两个管嘴3分别设置在弯曲段1两端的直管段2上,两个管嘴3的轴线处于同一平面上,D为管体外径。 Example 2: composition according to the present invention, the mold for bending the hot section of the reactor main duct 4 shown in FIG production, the bending radius of the curved section of the tubular body 1 on the elbow ^ 1.5D I, in the curved sections 1 provided at both ends of a straight pipe section 2, two straight sections of straight pipe nozzle near portion curved sections provided on a segment 23, two nozzles 3 are disposed on both ends of a curved section 2, two nozzles 3 axis in the same plane, D is the outer diameter of the tubular body. 管体采用超低碳不锈钢制作的整体锻件的一体结构, 按照管体的各部分结构外形制作出直管状的管坯。 One-piece structure integral tube of ultra-low carbon stainless steel forging, production of a tube in accordance with the straight portions of the tubular shape of the tubular body structure. 采用本发明的组合成型模具对管坯进行加工,芯模填充管体内空间的填充率为97.5%,上模4和下模5上设置有与管体上的管嘴3的位置和大小相适配的凹腔13。 The present invention is a combination of tube molding die machining, the filling tube mandrel body space packing ratio of 97.5%, the upper mold 4 and the lower die 5 is provided with a position and size of the nozzle and the tubular body 3 with appropriate with the cavity 13. 弯曲段l通过模压成型,直管段2和管嘴3采用机加工成型。 L molding by curved sections, the straight sections 2 and 3 using the nozzle forming machining. 加工后对产品进行测试,满足设计要求。 To test the product after processing, to meet the design requirements.

Claims (7)

1、组合成型模具,包括上模(4)、下模(5)和芯模,芯模采用金属制作,其特征是:芯模填充管体内空间的填充率大于95%,其中,填充率为芯模体积与管内空间体积之比;芯模包括多块上芯模、多块下芯模和多个楔子(6),楔子(6)设置于上芯模与下芯模之间且楔子(6)的宽度与管体内孔的直径相适配,楔子(6)的轴线处于管体内孔的轴线上,上芯模、下芯模和楔子(6)的数量相等,位置对应处的上芯模、下芯模和楔子(6)在管体内孔轴线上的长度相适配。 1, the combination of mold, comprising an upper mold (4), the lower die (5) and the core mold, the core mold is made of metal, characterized in that: The filling body filling the die mold space greater than 95%, wherein the filling rate is core mold and the inner volume of the space volume ratio of the tube; mandrel comprises a plurality of upper mandrel, a plurality of lower core die and a plurality of wedges (6), the wedge (6) and a wedge disposed between the core mold and the lower mold core ( diameter 6) with a width adapted hole of the pipe body, the axis of the wedge (6) is on the axis of the tubular body of the hole with equal amounts of the mandrel, the mandrel and the wedge (6), at a position corresponding to the core mold, a lower mold core and a wedge (6) on the pipe length is adapted to the body bore axis.
2、 如权利要求l所述的组合成型模具,其特征是:芯模填充主管道热段弯管的管体的管内空间的体积为97.5%。 2. The mold composition according to claim l, characterized in that: the volume of the space of the inner tube filled with the core mold hot section of main duct elbow pipe was 97.5%.
3、 如权利要求1或2所述的组合成型模具,其特征是:上芯模包括直管段上芯模(7)和弯曲段上芯模(8),直管段上芯模(7)的长度与对应管体的直管段(2)的长度匹配,多块弯曲段上芯模(8)叠置排列且叠置后的长度与管体的弯曲段(1)的内孔壁弧长相适配; 下芯模包括直管段下芯模(9)和弯曲段下芯模(10),直管段下芯模(9)的长度与对应管体的直管段(2)的长度匹配,多块弯曲段下芯模(10)叠置排列且叠置后的长度与管体的弯曲段(1)的内孔轴线弧长相适配。 3. The combination of claim mold of claim 1 or 2, characterized in that: the mandrel comprises an upper straight section of the core mold (7) and an upper curved sections mandrel (8), the straight pipe section of the core mold (7) straight pipe section (2) corresponding to the length of tubular body length to match, a plurality of curved segments on the mandrel (8) and arranged in stacked superposed curved section after the length of the tubular body (1) of the wall of the bore relative to the arc length appropriate Hotels; lower mandrel comprises a straight pipe lower core mold (9) and a curved segment lower mandrel (10), the straight pipe section (2) of the straight pipe lower core mold (9) the length of the corresponding tubular body matches the length, a plurality of curved sections (1) of the bending mandrel section (10) arranged and stacked stacking the length of the tubular body adapted to the inner bore axis arc length.
4、 如权利要求3所述的组合成型模具,其特征是:多块弯曲段下芯模(10)之间设置有周向定位结构。 4, the mold composition as claimed in claim 3, characterized in that: a plurality of curved sections with a lower mandrel is provided circumferentially between the positioning structure (10).
5、 如权利要求4所述的组合成型模具,其特征是:弯曲段下芯模(10)包括凸型下芯模(101)和凹型下芯模(102),凸型下芯模(101)的肩部平面(11)上设置有轴向的凸块(14),凹型下芯模(102)的肩部平面(11)上设置有轴向的凹槽(15),相邻的凸型下芯模(101)与凹型下芯模(102)的肩部平面(11)相互平面接触且凸块(14)与凹槽( 15)配合形成周向定位结构;多块凸型下芯模(101)和凹型下芯模(102)间隔叠置排列且叠置后的长度与管体的弯曲段n)的内孔轴线弧长相适配。 5. The composition as claimed in claim 4, wherein the mold, characterized in that: the curved segments mandrel (10) comprises a convex lower core die (101) and a concave lower core die (102), the male mold core (101 ) is provided on the plane shoulder (11) has an axial projection (14), provided with an axial groove (15) on the concave lower mandrel (102) plane of a shoulder (11), adjacent projections type lower core die (101) and the concave lower mold core (102) plane of a shoulder (11) in contact with each other and the plane of projection (14) of the recess (15) formed with a circumferential positioning mechanism; plurality of convex lower core the arc length of the die bore axis (101) and a concave lower mold core (102) arranged in superposed spaced curved sections n and the length of the laminated tube) is adapted.
6、 如权利要求l、 2、 4或5所述的组合成型模具,其特征是:下模(5)两侧为直线段墙面(12),上模(4)插入到下模(5)的直线段墙面(12)之间,上模(4)的宽度与下模(5)两侧的直线段墙面(12)之间的宽度相适配。 6, as claimed in claim l, in combination forming die 2, 4 or 5, characterized in that: the lower mold (5) on both sides of a straight line segment wall (12), the upper mold (4) is inserted into the lower mold (5 ) between the straight wall segments (12), the width between the straight wall segments (12) of the mold (4) the width of the lower mold (5) adapted to both sides.
7、 如权利要求3所述的组合成型模具,其特征是:下模(5)两侧为直线段墙面(12),上模(4)插入到下模(5)的直线段墙面(12)之间,上模(4)的宽度与下模(5)两侧的直线段墙面(12)之间的宽度相适配。 7. The composition as claimed in claim 3, said forming die, characterized in that: the lower mold (5) on both sides of a straight line segment wall (12), the upper mold (4) is inserted into the straight wall section of the lower mold (5) (12), the width between the upper mold (4) the width of the straight line segment and the lower mold wall (12) (5) adapted to both sides.
CN 200810300739 2008-03-27 2008-03-27 Combined shaping mold CN100563865C (en)

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CN101745782A (en) * 2008-12-22 2010-06-23 二重集团(德阳)重型装备股份有限公司 Method for manufacturing hot segment of bent pipe of main pipeline of reactor
CN102248047A (en) * 2011-06-01 2011-11-23 二重集团(德阳)重型装备股份有限公司 Combined mandrel used for die-pressing of elbow tube and application method thereof
CN103658274A (en) * 2012-09-11 2014-03-26 北京首宏钢重型装备技术有限公司 Pipe fitting forming device
CN103658273A (en) * 2012-09-11 2014-03-26 北京首宏钢重型装备技术有限公司 Combined core mould and pipe fitting bending mould
CN103506491B (en) * 2013-09-18 2015-11-18 燕山大学 The combination that a kind of main nuclear power pipeline is shaped bends upper die structure
CN103495630B (en) * 2013-09-29 2015-07-08 上海电机学院 Cold bend forming device for main pipeline of nuclear power station device and core module
CN104339487B (en) * 2014-10-30 2017-01-25 四川福翔科技有限公司 Forming die for bent connecting pipe

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