CN1115700A

CN1115700A - Manufacture of pump body and vane of sand-sucking pump

Info

Publication number: CN1115700A
Application number: CN 95111106
Authority: CN
Inventors: 李庆奎; 马俊堂
Original assignee: GUANHU MACHINERY PLANT PIZHOU JIANGSU PROV
Current assignee: GUANHU MACHINERY PLANT PIZHOU JIANGSU PROV
Priority date: 1995-07-09
Filing date: 1995-07-09
Publication date: 1996-01-31

Abstract

The manufacture processes include wooden mould prodn, sand mould prodn, casting and machining. After and mould prodn, grey cast iron cores are set at the connection end-face between pump body and pump cover and the axle hole center of vane wheel; sand core is set at the axle hole center of flange end-face; and steel moulds with inside coated with refractory material are used at the parts to be lathed and ground.

Description

The sand suction pump pump housing and impeller manufacture method

The present invention relates to the manufacture method of a kind of pump housing and impeller.

The pump housing of known sand suction pump and the manufacture method of impeller are at first to make wooden model, turn over the system sand mo(u)ld again according to wooden model, and the grey cast-iron that casting is dissolved in sand mo(u)ld carries out machining to the pump housing and impeller blank then.The sand suction pump that utilizes grey cast-iron to make is not wear-resisting, and service life is short generally between 30～40 days.Chinese patent " lining cast process for large dredge pump " is in the dredge pump pump case (CN1019594B), according to the former design section contour curve of dredge pump pump case, and whole lining casting wear-resistant metal material, nationality is to reach wear-resisting purpose.This method is inapplicable for making small-sized sand suction pump because of the manufacturing process complexity.

The objective of the invention is to provide a kind of manufacturing process simple, be easy to the sand suction pump pump housing of machining and the manufacture method of impeller.

Method of the present invention comprises manufacturing wooden model → turn over system sand mo(u)ld → casting white cast-iron → machining.After wherein turning over the system sand mo(u)ld, on sand mo(u)ld middle pump body and end face that pump cover is connected, in the axis hole of the indent at impeller center, lay the grey cast-iron core, in sand mo(u)ld, lay core in the axis hole of indent on the ring flange end face; Needs are carried out the pump housing of car, mill processing and the end face that is connected of pump cover, and its casting die adopts steel die; At the inboard refractory material of brushing of steel die.Implement the casting white cast-iron then.At last the pump housing is connected on the end face grey cast-iron core with pump cover and holes, tapping is holed to the grey cast-iron core at impeller center.

White cast iron wear-resistant is functional, but implements machining on white cast-iron, and difficulty is bigger.In the such scheme, be grey cast-iron, boring and tapping are more easily realized owing to need the position of boring and tapping; Owing to the position that needs car, mill processing is to come from the steel die demoulding, so thereby removed from back road car, mill manufacturing procedure realized the pump housing and impeller manufacturing process simply, be easy to the purpose of machining.The pump housing and the impeller that use this method to produce, under the situation that does not increase product cost, be about 5 times of employing grey cast-iron service life, economy and durability has reduced the number of times of changing the pump housing and impeller.

The invention will be further described in conjunction with the embodiments according to the sand suction pump pump housing and impeller manufacturing process flow below.

Embodiment:

(1) make wooden model, wooden model is according to the shape manufacturing of the pump housing and impeller, and positions such as the connecting hole on the pump housing that wood is made and end face that pump cover is connected, on the ring flange, impeller center all increase round boss.

(2) make cylinder grey cast-iron core and core.

(3) turn over the system sand mo(u)ld, wooden model is carried out founding, carry out the position of car, mill processing at needs, it is the pump housing is connected end face with pump cover casting die employing steel die, sand mo(u)ld is all adopted at other position, behind the sand mold molding wooden model of centre is removed, and founding at this moment comes out to be combined by sand mo(u)ld and punching block for the mould of casting usefulness, the round boss position of wooden model shows as the axis hole of indent in sand mo(u)ld.

(4) brush refractory material, be connected the inboard refractory material of brushing of steel die that end face adopts with the sand lid at the pump housing.

(5) lay the iron core core, on sand mo(u)ld middle pump body and end face that pump cover is connected, in the axis hole of the indent at impeller center, lay cylinder grey cast-iron core, in sand mo(u)ld, lay the cylinder core on the ring flange end face in the axis hole of indent.

(6) casting white cast-iron, the white cast-iron of the fusion of in sand mo(u)ld, once casting, cooling back form removal, punching block reclaims secondary and uses.

(7) machining is connected with pump cover to the pump housing that grey cast-iron core on the end face is holed, tapping, and the grey cast-iron core at impeller center is implemented boring.

Claims

1, the manufacture method of a kind of sand suction pump pump housing and impeller, comprise the manufacturing wooden model, turn over the system sand mo(u)ld, casting cast iron, machining, it is characterized in that after turning over the system sand mo(u)ld, on sand mo(u)ld middle pump body and end face that pump cover is connected, lay the grey cast-iron core in the axis hole of the indent at impeller center, in sand mo(u)ld, lay core in the axis hole of indent on the ring flange end face, needs are carried out car, the pump housing of mill processing and the end face that is connected of pump cover, its casting die adopts steel die, at the inboard refractory material of brushing of steel die, implement the casting white cast-iron then, at last the pump housing being connected on the end face grey cast-iron core with pump cover holes, tapping is holed to the grey cast-iron core at impeller center.

2, the manufacture method of the sand suction pump pump housing according to claim 1 and impeller, when it is characterized in that making wooden model on the pump housing that wood is made and end face that pump cover is connected, the connecting hole on the ring flange, the positions such as centre bore of impeller all increase round boss.