CN100410546C - Manufacturing method of centrifugal pump and submerged pump vanes - Google Patents

Abstract

A method of manufacturing centrifugal pump and submersible pump impellers comprises the following steps: first, stretching out a semicircular lug in the central position of a circular flat-slab; second, setting using the semicircular lug and punching a hole in the central position of the circular flat-slab; third, in the central position of the circular flat-slab, setting using the semicircular lug and stretching the semicircular lug as a cylinder; forth; blanking and repairing further. The assembling process of the impeller includes the following steps: first, punching the circular flat-slab; second, fixed-position welding of upper and lower internal ring parts and the shaft sleeve; third, integral welding of the impeller, i.e. fixed-position welding of the impeller using the setting mould to make the impeller performance stable.

Description

The manufacture method of centrifugal pump impeller

Technical field

The present invention relates to a kind of manufacture method of impeller, be meant a kind of manufacture method of centrifugal pump impeller especially.The method of nonmetal casting or metal extrusion modling adopts stainless steel material, stretches and the welding of positioning module location with stretching die.

Background technique

At present, the manufacture method of existing centrifugal pump impeller is the method for metal casting or metal extrusion modling.The general metallic material such as aluminium scrap, copper scrap, iron scrap that adopt are made, and adopt cast blank or die casting blank to make through cutting.Casting adopts metal to be melted into the liquid castable moulding, and the impeller of casting is that the liquid metal spontaneous current becomes.Its deficiency is that density value is very low, and there are trachoma not of uniform size and pore in the surface, is easy to be corroded and break.

Die casting also is that metal is melted into liquid through the die casting machine extrusion modling, carries out machining again and finishes.Though its deficiency is that the part of metal extrusion modling is high more a lot of than the parts density value of metal casting, but material is a copper, mould is easy to be full of cracks, have influence on product surface and have very that also there is pore be full of cracks crackle, the inside of projection, die life is not long, have only two, 30,000 moulds, cause the cost of manufacturing higher, manufacturing efficiency is low.

Summary of the invention

The manufacture method that the objective of the invention is to avoid above-mentioned deficiency of the prior art and a kind of centrifugal pump impeller is provided, impeller is made of choma, blade and central shaft, and choma adopts the stretching die manufacturing, and blade, central shaft adopt positioning module to be welded.

Purpose of the present invention can reach by following measure: a kind of manufacture method of centrifugal pump impeller,

The impeller of centrifugal pump is made of choma, blade and circular flat board that axle sleeve is housed, and choma stretches with stretching die and forms, and its drawing and forming process is as follows:

The first step is stretched as half-circle projection in the central position of disk;

Second step was utilized the half-circle projection location in the central position of disk, went out a hole;

The 3rd step was utilized the half-circle projection location in the central position of disk, and half-circle projection partly is stretched as cylinder;

Further stamping-out of the 4th step and finishing;

Blade, circular dull and stereotyped location welding and impeller assembling, its process is as follows:

The circular flat board of first step punching out ring;

The circular dull and stereotyped upper and lower annular inner portion of the second step ring and the welding of axle sleeve location;

The 3rd step impeller integral solder is carried out integral solder with the circular dull and stereotyped of choma, blade and upper and lower welding axle sleeve with the positioning module location;

The choma material is a corrosion resistant plate.

The present invention has the following advantage that has compared to existing technology:

The manufacture method choma of invention adopts the stretching die manufacturing, and the cylinder heights on the choma can be greater than 8mm, disposable making, and the alignment of choma can be protected;

Impeller adopts the welding of positioning module location, during work, makes impeller performance stable, does not have and beats without acceptance of persons, makes impeller when work good lifting efficient can be arranged, and electrical machinery life is improved greatly;

Material is made with stainless steel materials, and impeller surface is smooth, no burr, and no corrosion phenomenon significantly improves environmental-protecting performance.

Description of drawings

Fig. 1 choma stretching (one)

Fig. 2 choma stretching (two)

Fig. 3 choma stretching (three)

Fig. 4 choma stretching (four)

Fig. 5 central shaft location (one)

Fig. 6 central shaft location (two)

Fig. 7 central shaft location (three)

The figure number explanation

1 ... the patrix 12 of mould one ... the counterdie 23 of mould one ... mould one dash tool 34 ... disk 5 ... the patrix 6 of mould two ... the counterdie 7 of mould two ... mould three patrixes 8 ... mould three counterdies 9 ... mould three is towards tool 10 ... mould four patrixes 11 ... mould four counterdies 12 ... circular dull and stereotyped 13 ... Lower shaft sleeve 14 ... Upper shaft sleeve 15 ... blade 16 ... choma

Embodiment

The impeller of centrifugal pump is made of choma, blade and circular flat board, the upper strata is a choma, choma is the annulus that interior circle is connected with cylinder, the employing stretching die is made, the middle level is the blade of flexure type, lower floor has center hole and upper and lower circular flat board with axle sleeve, and blade, the circular dull and stereotyped positioning module that adopts are welded.

Choma stretches with stretching die and forms, and its drawing and forming process is as follows:

The first step is pulled out half-circle projection in the central position of disk: please refer to Fig. 1 choma and draw the second month in a season (one), disk 4 put into the patrix 1 of the mould one with recessed semicircle and have between the counterdie 2 of mould one of circular hole, the mould one with semicircle head dash tool 3 plus-pressures, pull out half-circle projection in disk 4 central positions;

Second step was partly gone out a hole in the central position of disk half-circle projection: please refer to Fig. 2 choma stretching (two), the disk 4 that the central position that circle is dull and stereotyped has half-circle projection, its half-circle projection is partly put into has semi-circular recesses, have in its groove in the counterdie 6 of mould two in a hole, utilization has semicircle head is arranged, its head has a cylindrical patrix 5, and the core of disk 4 is gone out a hole;

The 3rd step partly was stretched as cylinder in the central position of disk half-circle projection: please refer to Fig. 3, the disk 4 that circular dull and stereotyped central position half-circle projection is partly had a hole places between mould three patrixes 7 with center hole and mould three counterdies 8 with cylinder shrinkage pool, at columniform mould three under tool 9 pressure effects, the half-circle projection that half-circle projection partly has a disk 4 in a hole partly produces flow of metal and is drawn as a cylinder, its cylinder reaches needed height and size, reaches the base dimension requirement of choma 16;

The 4th step choma 16 stamping-outs and finishing: please refer to Fig. 4 choma stretching (four), the choma 16 that will have the base dimension requirement places between mould four patrixes 10 and mould four counterdies 11, under the ambient pressure effect, make needed choma 16 excircle dimension stamping-out finishing are come out, reach the purpose of stamping-out and finishing;

This choma 16 does not need annealing in process in drawing process.

Blade 15, circular dull and stereotyped 12 adopts positioning module welding and impeller assembling, and its process is as follows:

Circular dull and stereotyped 12 punching out of the first step: please refer to Fig. 5 central shaft location (), utilize stamping die once to go out circular flat board 12, make circular dull and stereotyped 12 cylindrical and central shaft hole reach concentric purpose, meet the demands thereby reach coaxiality error;

Circular dull and stereotyped 12 and axle sleeve welding of the second step ring: please refer to Fig. 6 central shaft location (two), Lower shaft sleeve 13, circular flat board 12, Upper shaft sleeve 14 are sealed in the locating column of positioning module successively, be subjected to the pressurization in mechanical electrode magnetic field integrally welded, become upper and lower the circular dull and stereotyped of axle sleeve that be welded with

The 3rd step impeller integral solder: please refer to Fig. 7 central shaft location (three), with choma 16, blade 15, and the circular dull and stereotyped of upper and lower welding axle sleeve carry out integral solder with the positioning module location, make it to become impeller.

This product material is a corrosion resistant plate.

The manufacture method of invention adopts the welding of positioning module location, and the cylinder heights on the choma can be greater than 8mm, disposable making, and the alignment of choma can be protected, and during work, makes impeller performance stable, does not have and beats without acceptance of persons, and material is made with stainless steel materials.Impeller surface is smooth, no burr, no corrosion phenomenon.Make impeller when work, good lifting efficient can be arranged.Through contrast test, the centrifugal pump with the inventive method is made improves 3 meters on its lift, and flow improves 0.5 ton, and electric machine temperature rise significantly reduces, and can reduce by 12 degree, and electrical machinery life is improved greatly.

Claims (1)

1. the manufacture method of a centrifugal pump impeller is characterized in that:

The impeller of centrifugal pump is made of choma, blade and circular flat board that axle sleeve is housed,

Choma stretches with stretching die and forms, and its drawing and forming process is as follows:

The first step is stretched as half-circle projection in the central position of disk;

Second step was utilized the half-circle projection location in the central position of disk, went out a hole;

The 3rd step was utilized the half-circle projection location in the central position of disk, and half-circle projection partly is stretched as cylinder;

Further stamping-out of the 4th step and finishing;

Blade, circular dull and stereotyped location welding and impeller assembling, its process is as follows:

The circular flat board of first step punching out ring;

The circular dull and stereotyped upper and lower annular inner portion of the second step ring and the welding of axle sleeve location;

The 3rd step impeller integral solder is carried out integral solder with the circular dull and stereotyped of choma, blade and upper and lower welding axle sleeve with the positioning module location;

The choma material is a corrosion resistant plate.

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