CN1714960A - Stainless steel centrifugal pump shell forming method - Google Patents
Stainless steel centrifugal pump shell forming method Download PDFInfo
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- CN1714960A CN1714960A CN 200510088353 CN200510088353A CN1714960A CN 1714960 A CN1714960 A CN 1714960A CN 200510088353 CN200510088353 CN 200510088353 CN 200510088353 A CN200510088353 A CN 200510088353A CN 1714960 A CN1714960 A CN 1714960A
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Abstract
The present invention belongs to the field of centrifugal pump making technology. The forming process of centrifugal pump shell of stainless steel includes: adopting outer mold with steel mold frame comprising three combined forming mold blocks inside outer mold steel jacket; setting the core mold in the bottom and the inner mold of polyurethane material on the core mold; setting the initially formed cap-shaped stainless steel pump shell blank between the outer mold and the inner mold; applying the pressure head with oil press onto the inner mold slowly to make the inner mold extrude the stainless steel pump shell blank so as to form the stainless steel pump shell; pushing up the top board in the bottom of the outer mold steel jacket to open the three forming mold blocks and to take out the formed centrifugal pump shell of stainless steel.
Description
Technical field:
The present invention relates to a kind of forming method of stainless steel centrifugal pump pump case, belong to centrifugal pump and make the field.
Background technology:
Granted publication CN1045811C, title " press moulding centrifugal pump and manufacture method thereof ", between pump case and the impeller, strike out a scroll casing shape volute casing that increase gradually along liquid flow path direction section, asymmetric on circumference, uneven by the expansion molding method, the volute casing outlet is communicated with the curved neck of the outlet that becomes the diameter elliptical section.Adopt metal system lotus formula distinguish elasticity combined die and polyurethane rubber to make inner punch, with the metallic plate of 0.5～5.0 millimeter of thickness, under normal temperature, high pressure, repeatedly punch forming.Its weak point: the one, because die is the combination of metal system lotus formula distinguish elasticity, be arranged in steel plate between punch and die at the punching course of top board, the power that steel plate bore not only results from the positive pressure of punch, and result from the be complementary buffer brake of top board of the elasticity die outside and die, one positive one anti-what form is the interactional power that repeatedly is folded to, this is folded to power, not only easily in the forming process of pump case, produce hard power and concentrate, influence pump case service life, and do not note easily making pump case embrittlement slightly, directly have influence on the Forming Quality and the ratio of briquetting of pump case; The 2nd, lack core in the shaping mould, cause polyurethane rubber internal mold constricted flow, the local steel plate of pump case is stretched excessively, causes intensity reduction, bearing capacity to reduce, and directly has influence on the service life of pump case; The 3rd, shaping moudle structure complexity, manufacturing cost height, operation requires high, the die of passing bottom guide rod must be arranged, otherwise can't work.
Summary of the invention:
Purpose of design: avoid the weak point in the background technology, design a kind of external mold and adopt three formation of lots modules to synthesize removable rigidity shaping mold frame, internal mold adopts the extruding fluent material and pushes internal mold, forces the corrosion resistant plate that is positioned at inside and outside intermode to be shaped to stainless steel centrifugal pump shell by the oil head in the hydraulic press.
Design: in order to realize above-mentioned purpose of design.1, to adopt three formation of lots mould module combinations to become centrifugal pump shell rigidity shaping mold frame be one of feature of the present invention to external mold, because combined type rigidity shaping mold frame does not have elasticity, that is to say, when internal mold acts on the corrosion resistant plate, corrosion resistant plate acts on external mold when inboard, it is indeformable that external mold is rigidity, that has guaranteed that corrosion resistant plate bears has only positive acting power, and do not bear opposition, avoid the generation of a positive reflexed to power, guarantee that pump case in the forming process can not produce hard power and concentrate, guarantee its service life, avoided pump case embrittlement; Secondly, combined type rigidity shaping mould not only can make things convenient for Rapid Combination to become the rigidity shaping mold frame on structural design, and can be for convenience detach, so that fast demoulding; The 2nd, simple in structure, need not the top board in the background technology, also need not to pass die bottom guide rod; The 3rd, the cost of manufacture of external mold is low, and long service life has realized the moulding of low-cost pump case.2, adopting the slow pressure of hydraulic press internal mold is two of feature of the present invention, because the extensibility of stainless steel is the extension of the slow property of outer LJL, therefore adopting the hydraulic press pressure head slowly to stress on slowly acts on the stainless steel pump case after internal mold, internal mold cushion once more, the slow extensibility of stainless steel pump case is conformed to the active force that internal mold applies just, the phenomenons such as pump case embrittlement that punching press caused of having avoided background technology to exist have been guaranteed the high-quality moulding of pump case.
Technical scheme 1: stainless steel centrifugal pump shell forming method, the shape of external mold inboard is with the centrifugal pump shell shape, external mold adopts three formation of lots mould module combinations to become rigidity framed and be positioned at the external mold steel bushing, just the shape for hat stainless steel pump case of one-step forming is positioned at external mold and intermode, core is positioned at the shape for hat stainless steel pump case bottom of one-step forming just, internal mold adopts the polyurethane rubber material and is positioned on the core, the head of hydraulic press directly acts on the internal mold lentamente, internal mold is flowing under the guiding of the pressure of hydraulic press and core around the shape for hat stainless steel pump case of preliminary moulding, the extruding corrosion resistant plate, force the shape for hat corrosion resistant plate extensional of one-step forming just, when the shape for hat corrosion resistant plate of the first one-step forming of slow distortion touches fully mutually with the inwall of external mold, just the shape for hat stainless steel centrifugal pump shell of one-step forming is extruded moulding, the top board of external mold steel bushing bottom is by jack-up, open three rigidity external molds, can take out the stainless steel centrifugal pump shell that is extruded moulding.
Technical scheme 2: stainless steel centrifugal pump shell shaping mould, constitute by external mold steel bushing, core, external mold and internal mold, external mold constitutes shaping mold frame by three formation of lots moulds, the shape that the inboard constituted of shaping mold frame is with the centrifugal pump shell shape and be positioned at the external mold steel bushing, the shape for hat stainless steel pump case of the bottom of the shape for hat stainless steel pump case of one-step forming and first one-step forming was positioned at external mold at the beginning of core was positioned at, and internal mold is positioned on the core and the shape for hat stainless steel pump case of first one-step forming.
The present invention compares with background technology, the one, external mold adopts the design of three combined type rigidity shaping moulds, the low cost of manufacture of not only simple in structure, unique, mould, and fundamentally avoided in the centrifugal pump shell moulding a positive reflexed to the generation of power, guarantee that centrifugal pump shell can not produce hard power and concentrate in the process of extrusion modling, embrittlement can not take place; The 2nd, the rigidity of three combined type shaping moulds has not only been guaranteed in the design of external mold steel bushing, and makes things convenient for quick backform, the demoulding; The 3rd, the internal mold guiding extrusion modling stainless steel centrifugal pump shell that evenly flows has been guaranteed in the design of core, has avoided the centrifugal pump shell part to be extended phenomenons such as the thin or wall of the wall that is caused splits, intensity, bearing capacity and the service life of having guaranteed centrifugal pump shell by excessive compression; The 4th, adopt hydraulic press process pump casing forming squeezing pressure source, the punching press that has solved the background technology existence easily causes the deficiency of pump case embrittlement, has guaranteed the Forming Quality of pump case and the yield rate of moulding.
Description of drawings:
Fig. 1 is the forming die structure schematic diagram of stainless steel centrifugal pump shell forming method.
Fig. 2 is the forming die structure schematic diagram of background technology centrifugal pump shell forming method.
The specific embodiment:
Embodiment 1: with reference to accompanying drawing 1.Stainless steel centrifugal pump shell forming method, the shape of external mold inboard are with the centrifugal pump shell shape, and external mold adopts three formation of lots mould module combinations to become rigidity framed, and the shape of the framed inboard of rigidity that is to say with the shape of stainless steel centrifugal pump shell, the shape of the moulding of.The framed purpose that is positioned at the external mold steel bushing of rigidity is: the one, and the external mold steel bushing is overall structure, and the combination forming rigidity is framed within it for three formation of lots moulds, and the rigidity that just equals combination forming is framed; The 2nd, because external mold steel bushing inside bottom has a top board, this top board can eject the external mold after the moulding synchronously, and the external mold after ejecting promptly divides automatic separation, and the stainless steel centrifugal pump shell that is extruded moulding can conveniently take out.Just the shape for hat stainless steel pump case of one-step forming is meant that elder generation becomes corrosion resistant plate punching press or oil pressure the preliminary shape of centrifugal pump shell, it generally is shape for hat, put it into external mold and interior intermode then, core adopts rigid material to make and be positioned at the shape for hat stainless steel pump case bottom of first one-step forming, internal mold adopts the polyurethane rubber material and is positioned on the core, the head of hydraulic press directly acts on the internal mold lentamente, internal mold is flowing under the guiding of the pressure of hydraulic press and core around the shape for hat stainless steel pump case of preliminary moulding, push the shape for hat stainless steel pump case of first one-step forming and can not form the dead angle, force the stainless steel pump case extensional of the shape for hat of one-step forming just, when the shape for hat stainless steel pump case of the first one-step forming of slow distortion touches fully mutually with the inwall of external mold, just the shape for hat stainless steel centrifugal pump shell of one-step forming is extruded moulding, the top board of external mold steel bushing bottom is by hydraulic press or other existing ejecting mechanism jack-up, open three rigidity external molds, can take out the stainless steel centrifugal pump shell that is extruded moulding.Hydraulic press head moulding pressure is controlled in the pressure limit of its setting.
Embodiment 2: with reference to accompanying drawing 1.The stainless steel centrifugal pump shell shaping mould is made of external mold steel bushing 6, core 4, external mold 3 and internal mold 2, external mold constitutes shaping mold frame by three formation of lots moulds, the shape that the inboard constituted of shaping mold frame is with the centrifugal pump shell shape and be positioned at external mold steel bushing 6, the shape for hat stainless steel pump case 1 of the bottom of the shape for hat stainless steel pump case 1 of one-step forming and first one-step forming was positioned at external mold 3 at the beginning of core 4 was positioned at, and internal mold 2 is positioned on the core 4 and the shape for hat stainless steel pump case 1 of first one-step forming.Backing plate 5 in the external mold 3 is positioned at the framed bottom of external mold, and its face and pump case bottom surface match.Following and the pump case bottom surface of core 4 matches, above be the conical surface or top around be the inclined-plane.Top board 7 is positioned at the bottom of external mold steel bushing 6 inboards, and the end face of its top board 7 touches mutually with the bottom of external mold 3.The processing and fabricating of rust steel centrifugal pump shell shaping mould is a prior art, is not described herein at this.
What need understand is: though the foregoing description is to the present invention's detailed explanation of contrasting; but these explanations are just illustrative to the present invention; rather than limitation of the present invention, any innovation and creation that do not exceed in the connotation of the present invention all fall within the scope of protection of the present invention.
Claims (6)
1, a kind of stainless steel centrifugal pump shell forming method, it is characterized in that: the shape of external mold inboard is with the centrifugal pump shell shape, external mold adopts three formation of lots mould module combinations to become the rigidity mould and be positioned at the external mold steel bushing, just the shape for hat stainless steel pump case of one-step forming is positioned at external mold and intermode, core is positioned at the shape for hat stainless steel pump case bottom of one-step forming just, internal mold adopts the polyurethane rubber material and is positioned on the core, the head of hydraulic press directly acts on the internal mold lentamente, internal mold is flowing under the guiding of the pressure of hydraulic press and core around the shape for hat stainless steel pump case of preliminary moulding, the extruding corrosion resistant plate, force the shape for hat corrosion resistant plate extensional of one-step forming just, when the shape for hat corrosion resistant plate of the first one-step forming of slow distortion touches fully mutually with the inwall of external mold, just the shape for hat stainless steel centrifugal pump shell of one-step forming is extruded moulding, the top board of external mold steel bushing bottom is by jack-up, open three rigidity external molds, can take out the stainless steel centrifugal pump shell that is extruded moulding.
2, stainless steel centrifugal pump shell forming method according to claim 1 is characterized in that: hydraulic press head pressurization size is controlled in the pressure limit of its setting.
3, a kind of stainless steel centrifugal pump shell shaping mould, it is characterized in that constituting by external mold steel bushing, core, external mold and internal mold, external mold constitutes shaping mold frame by three formation of lots moulds, the shape that the inboard constituted of shaping mold frame is with the centrifugal pump shell shape and be positioned at the external mold steel bushing, the shape for hat stainless steel pump case of the bottom of the shape for hat stainless steel pump case of one-step forming and first one-step forming was positioned at external mold at the beginning of core was positioned at, and internal mold is positioned on the core and the shape for hat stainless steel pump case of first one-step forming.
4, stainless steel centrifugal pump shell shaping mould according to claim 3 is characterized in that: the backing plate in the external mold is positioned at the framed bottom of external mold, and its face and pump case bottom surface match.
5, stainless steel centrifugal pump shell shaping mould according to claim 3 is characterized in that: the following and pump case bottom surface of core matches, end face is the conical surface.
6, stainless steel centrifugal pump shell shaping mould according to claim 3, it is characterized in that: top board is positioned at the bottom of external mold steel bushing inboard, and the end face of its top board touches mutually with the bottom of external mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100883532A CN100450655C (en) | 2005-08-10 | 2005-08-10 | Stainless steel centrifugal pump shell forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100883532A CN100450655C (en) | 2005-08-10 | 2005-08-10 | Stainless steel centrifugal pump shell forming method |
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| CN1714960A true CN1714960A (en) | 2006-01-04 |
| CN100450655C CN100450655C (en) | 2009-01-14 |
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| CNB2005100883532A Active CN100450655C (en) | 2005-08-10 | 2005-08-10 | Stainless steel centrifugal pump shell forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381268C (en) * | 2006-03-11 | 2008-04-16 | 邱则有 | Centrifugal tool |
| CN100381267C (en) * | 2006-03-11 | 2008-04-16 | 邱则有 | Centrifugal tool |
| CN103769819A (en) * | 2014-01-23 | 2014-05-07 | 浩溪机械(上海)有限公司 | Processing process of stainless steel sewage-discharging pump shell |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH527006A (en) * | 1970-08-04 | 1972-08-31 | Alusuisse | Matrix for metal deformation |
| CN85108775A (en) * | 1985-11-29 | 1987-06-10 | 四川省工业设备安装公司 | Manufacturing process of hot extruded seamless T pipe connection and shaped device thereof |
| CN1045912C (en) * | 1995-12-11 | 1999-10-27 | 华中理工大学 | Mold-extruding, expanding and forming process for multi-way pipe and its die equipment |
| CN1045811C (en) * | 1996-03-26 | 1999-10-20 | 阳江市不锈钢冲压泵工业有限公司 | Press moulding centrifugal pump and its mfg. method |
| CN2428233Y (en) * | 1999-12-30 | 2001-05-02 | 孙利涵 | Hollow-section extrusion mould |
| CN2603716Y (en) * | 2003-02-26 | 2004-02-18 | 华中科技大学 | Die forging forming mould of metal extrusion pressing |
| CN2915305Y (en) * | 2005-08-10 | 2007-06-27 | 杭州南方特种泵业有限公司 | Forming die of rustless steel centrifugal pump carcass |
-
2005
- 2005-08-10 CN CNB2005100883532A patent/CN100450655C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381268C (en) * | 2006-03-11 | 2008-04-16 | 邱则有 | Centrifugal tool |
| CN100381267C (en) * | 2006-03-11 | 2008-04-16 | 邱则有 | Centrifugal tool |
| CN103769819A (en) * | 2014-01-23 | 2014-05-07 | 浩溪机械(上海)有限公司 | Processing process of stainless steel sewage-discharging pump shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100450655C (en) | 2009-01-14 |
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Effective date of registration: 20100108 Address after: Renhe Industrial Zone Renhe Town Yuhang District Hangzhou city Zhejiang Province Patentee after: Hangzhou Nanfang Special Pump Industry Co., Ltd. Address before: Renhe Town, Yuhang District, Hangzhou, Zhejiang Patentee before: Nanfang Specific Pump Industry Co., Ltd., Hangzhou |
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Owner name: NANFANG PUMP INDUSTRY CO., LTD. Free format text: FORMER OWNER: HANGZHOU NANFANG SPECIAL PUMP INDUSTRY CO., LTD. Effective date: 20110614 |
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Effective date of registration: 20110614 Address after: 311107 Renhe District, Renhe Town, Yuhang District, Zhejiang, Hangzhou Patentee after: Nanfang Pump Industry Co.,Ltd. Address before: 311107 Renhe District, Renhe Town, Yuhang District, Zhejiang, Hangzhou Patentee before: Hangzhou Nanfang Special Pump Industry Co., Ltd. |
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Address after: No. 46 Hangzhou City, Zhejiang province 311107 Yuhang District Renhe Street Renhe Road Patentee after: Southern Gold environment Limited by Share Ltd Address before: 311107 Renhe District, Renhe Town, Yuhang District, Zhejiang, Hangzhou Patentee before: Nanfang Pump Industry Co.,Ltd. |