CN207952505U - Nuclear island evaporator conical shell solid forging mold - Google Patents

Abstract

The utility model discloses a kind of nuclear island evaporator conical shell solid forging mold, fixing sleeve is provided with punch forming head equipped with core model is molded above molding core model on forming core shaft；The forming surface of punch forming head matches with the forming surface of molding core model, and the forming surface of the molding core model includes the upper cylinder forming surface, cone cylinder forming surface and lower cylinder forming surface being sequentially connected；The ratio between the section radius r and the radius R of conical shell forging of core model r/R=0.70-0.80 are molded on same section；The cross section of punch forming head is arcwall face.The molding core model is provided at both ends with core model flange, and the height of the core model flange is less than the wall thickness of conical shell forging.The stamping surface of punch forming head is cylindrical surface, which is equal to the radius in the same section of conical shell forging.The forging mold can not only effectively improve the uniformity of metal microstructure and mechanical property, and can greatly reduce metal wastage, the effectively save cost of raw material and processing and fabricating cost.

Description

Nuclear island evaporator conical shell solid forging mold

Technical field

The utility model is related to nuclear power nuclear island large forgings molding die more particularly to nuclear island steam generator conical shells Solid forging mold.

Background technology

Nuclear steam generator is one of the three big equipment in nuclear island, is the side of PWR nuclear power plant primary Ioops, secondary circuit Boundary, for the heat transfer that it generates reactor to steam generator secondary side, the steam of generation is dry through I and II steam-water separator Steam turbine generator power generation is pushed after dry.Therefore, nuclear steam generator is connected with reactor pressure vessel, not only directly affects electricity The power and efficiency stood, and carry out also playing a part of obstructing radioactivity heat carrier when heat exchange, to the safety of nuclear power station It is most important.

Steam generator tube body is mainly made of the upper, lower tube shell and cone shell of upper and lower end socket and tubular, this A little components belong to large thick-wall shape Forging.Built-in steam-water separation equipment and inversion are provided in the outer housing of steam generator U-tube bundle, cone shell is located at steam-water separation equipment and the adjacent corresponding position of inverted U-shape pipe, plays connection steam generator The effect of upper and lower cylinder belongs to large volume, and big cross section, complex-curved core level-one forging, forging difficulty is very big, and performance is wanted It asks high, only plans as a whole each production link such as to smelt, forge and be heat-treated, uniform microstructure and mechanical property could be obtained Can, so that it is guaranteed that the use reliability of forging products and safety.

Evaporator conical shell is the important component of nuclear power nuclear island steam generator tube body, existing steam generator conical shell cylinder Manufacturing method nothing more than two ways：First, polylith cylinder piece is carried out splicing manufacture by the method for welding, although as material Expect that the reach of science, the performance of welding material are greatly improved, welding technology also emerges one after another, but by welding The structure of splicing cannot always form complete metal streamline, since nuclear steam generator is chronically at the severe of high temperature and pressure In running environment, and bear alternate load and pipeline vortex be formed by pressure jump, easily cause stress distribution is not uniform to answer Power is concentrated, and fatigue, creep and damage are easy tod produce；And the method for such welding manufacture, complex process, welding interval are long, multiple Miscellaneous stressed zone quality stability is poor, and it is low to directly contribute yield rate, and manufacturing cost is high.Second is that first forging large-sized cylindric base Part, then the machining of big cutting output is carried out to blank and conical shell cylinder finished product is made, although this production method can keep preferable Metal inside quality, but material cost and cost of manufacture are big；Since conical shell cylinder both ends caliber is different, therefore the forging base of tubular Part wall thickness size is larger, this just needs to cut a large amount of high-performance nuclear material ability finished product, raw materials consumption amount Very big, resection is no better than the weight of cone cylinder finished product, a large amount of wastes of raw material is caused, simultaneously because follow-up amount of machining It is very big, and cost of manufacture is increased, a large amount of wastes of high-performance high cost metal material are not only caused, but also considerably increase Processing and fabricating cost.

Utility model content

For the above-mentioned deficiency present in the prior art, the technical problem to be solved by the utility model is to provide a seed nucleus Island evaporator conical shell solid forging mold, can not only effectively improve the uniformity of metal microstructure and mechanical property, Er Qieneng Greatly reduce metal wastage, the effectively save cost of raw material and processing and fabricating cost.

In order to solve the above-mentioned technical problem, the nuclear island evaporator conical shell solid forging mold of the utility model, including molding Mandrel, fixing sleeve is provided with punch forming head equipped with molding core model above molding core model on the forming core shaft；It is described The forming surface of punch forming head with molding core model forming surface match, the forming surface of the molding core model include be sequentially connected it is upper Cylinder forming surface, cone cylinder forming surface and lower cylinder forming surface；The radius of the section radius r and conical shell forging of core model are molded on same section The ratio between R r/R=0.70-0.80；The cross section of the punch forming head is arcwall face.

In said structure, since molding core model and punch forming head are using mutually identical forming surface, the forming surface is again It matches with the cross sectional shape of conical shell forging, the conical shell forging shape after forging matches with final products and approached, and subtracts significantly The consumption for having lacked raw material metal reduces the waste of raw material, has efficiently controlled forging products shape, has greatly reduced machinery Allowance improves production efficiency, significantly reduces the cost of raw material and processing and fabricating cost of conical shell forging.And due to The solid forging shaping that the mold realizes conical shell makes the metal structure uniformity of forging, and metal streamline is smooth coherent, protects Being greatly improved for conical shell product mechanical property has been demonstrate,proved, high temperature and pressure and time dependent loading and the steam whirlpool of steam generator can be more born Stream is formed by bad working environments, is conducive to the raising of the homogenization and safety in operation of cone shell working stress；And whole forging It makes and has not only further refined metal structure, but also conducive to the accurate forming of conical shell.Due also to forming core mode cross section radius r is forged with conical shell The Ri controls of part section radius are in 0.70-0.8 range, and the cross-sectional shape of punch forming head is arcwall face so that forming core The forming surface shape of mould and punch forming head is more nearly the shape of forging products, be better achieved forging products it is final at Type, and shaping resistance is reduced, stress is good in a mold for forging in forming process, and metal streamline is reasonably distributed, molding Even tissue afterwards, the stabilization of forging overall performance.

The further embodiment of the utility model, the molding core model are provided at both ends with core model flange, and the core model is convex The height of edge is less than the wall thickness of conical shell forging.Realize the accurate forming of forging length direction.

Preferred embodiments of the present invention, the upper cylinder forming surface and lower cylinder forming surface are cylindrical surface, the cone Cylinder forming surface is circular conical surface.The diameter of section of the upper cylinder forming surface is more than the diameter of section of lower cylinder forming surface.Be conducive to forging Circumferential accurate forming.

The stamping surface of preferred embodiments of the present invention, the punch forming head is cylindrical surface, the cylinder radius surface Equal to the radius in the same section of conical shell forging.Accurately realize forging final shaping unit.

Description of the drawings

With reference to the accompanying drawings and detailed description to the utility model nuclear island evaporator conical shell solid forging mold make into One step explanation.

Fig. 1 is the cross-section structure view of evaporator conical shell forging finished product；

Fig. 2 is a kind of structural representation of specific implementation mode of the utility model nuclear island evaporator conical shell solid forging mold Figure；

Fig. 3 is A-A cross-sectional views of Fig. 2 illustrated embodiments；

Fig. 4 is the structural schematic diagram that core model is molded in Fig. 2 illustrated embodiments.

In figure, 1-molding core model, 2-forming core shafts, 3-punch forming heads, 4-conical shell forging, 5-core model flanges, 6-upper cylinder forming surfaces, 7-cone cylinder forming surfaces, 8-lower cylinder forming surfaces.

Specific implementation mode

Evaporator conical shell forging finished product as shown in Figure 1, the end suitable for reading of the forging finished product are connected with evaporator upper shell, Lower mouth end is connected with evaporator lower shell, since the upper shell of evaporator and the caliber size of lower shell are not of uniform size, the forging Finished product realizes the transition and linkage of upper shell and lower shell；2580 milli of internal diameter of tube portion under forging finished product in the present embodiment The outer diameter of rice, 3018 millimeters of the internal diameter of upper tube portion, upper tube portion is 3360 millimeters, and Taper Pipe cylinder is a height of 1580 millimeters total.

Nuclear island evaporator conical shell solid forging mold as shown in Figure 2 and Figure 3, the forging mold be by forming core shaft 2, at Core die 1 and punch forming head 3 are constituted, and molding 1 fixing sleeve of core model is arranged loaded on forming core shaft 2 in the top of molding core model 1 There are punch forming head 3, molding core model 1 to be supported on hydraulic pressure by the fulcrum bearing of forming core shaft 2 and the both ends for being supported in forming core shaft 2 On engine base, punch forming head 3 is installed on the punch of hydraulic press.The forming surface of punch forming head 3 and molding core model 1 at Type face matches, and clearance channel shape between the two matches with the cross sectional shape of conical shell forging.Molding core model as shown in Figure 4 1 rotational forming face includes from left to right upper cylinder forming surface 6, cone cylinder forming surface 7 and the lower cylinder forming surface 8 being connected, upper cylinder successively Forming surface 6 and lower cylinder forming surface 8 are cylindrical surface, and cone cylinder forming surface 7 is then circular conical surface.It is respectively provided at the both ends of molding core model 1 There is core model flange 5, the height of the core model flange 5 is slightly less than the bobbin wall thickness of corresponding conical shell forging 4, two core model flanges 5 It is located at the outside of cylinder forming surface 6 and lower cylinder forming surface 8.The section radius r and conical shell of core model 1 are molded on same section The ratio between the section radius R of forging 4 r/R=07-08 so that the radius size of the two is close and is conducive to molding.Punch forming head 3 Cross section is arc surface, and the radius of the arc surface is identical as the radius size of conical shell forging 4 of same cross section.

When casting, the forge piece blank reheating of pre-profiling is placed in the correspondence section of shaping mould 1, hydraulic press punch and punch forming head After 3 downward punching presses to setting volume under pressure, after rotational forming mandrel 2 and molding 1 certain angle of core model, under punch forming head 3 is gone again Pressure, is so repeated up to and reaches design requirement.

Claims (5)

1. a kind of nuclear island evaporator conical shell solid forging mold, including forming core shaft（2）, it is characterised in that：In the forming core Axis（2）Upper fixing sleeve is equipped with molding core model（1）, in molding core model（1）Top be provided with punch forming head（3）；The punching press Moulded head（3）Forming surface with molding core model（1）Forming surface match, the molding core model（1）Forming surface include phase successively Upper cylinder forming surface even（6）, cone cylinder forming surface（7）With lower cylinder forming surface（8）；It is molded core model on same section（1）Section half Diameter r and conical shell forging（4）The ratio between radius R r/R=0.70-0.80；The punch forming head（3）Cross section be arcwall face.

2. nuclear island evaporator conical shell solid forging mold according to claim 1, it is characterised in that：The molding core model （1）Be provided at both ends with core model flange（5）, the core model flange（5）Height be less than conical shell forging（4）Wall thickness.

3. nuclear island evaporator conical shell solid forging mold according to claim 1, it is characterised in that：The upper cylinder forming surface （6）With lower cylinder forming surface（8）It is cylindrical surface, the cone cylinder forming surface（7）For circular conical surface.

4. nuclear island evaporator conical shell solid forging mold according to claim 3, it is characterised in that：The upper cylinder forming surface （6）Diameter of section be more than lower cylinder forming surface（8）Diameter of section.

5. nuclear island evaporator conical shell solid forging mold according to claim 1, it is characterised in that：The punch forming head （3）Stamping surface be cylindrical surface, the cylinder radius surface be equal to conical shell forging（4）The radius in same section.