CN103170599A

CN103170599A - Centrifugal pressure casting process of copper lining bearing

Info

Publication number: CN103170599A
Application number: CN2013100633739A
Authority: CN
Inventors: 黄初皓
Original assignee: Jiangxi Copper Co Ltd
Current assignee: Jiangxi Copper Corp; Jiangxi Copper Co Ltd
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2013-06-26
Anticipated expiration: 2033-02-28
Also published as: CN103170599B

Abstract

The invention discloses a centrifugal pressure casting process of a copper lining bearing. The centrifugal pressure casting process of the copper lining bearing comprises the following steps: firstly an outer circle of a shaft sleeve manufactured according to design is chamfered and cast bronze is added to an inner hole, and meanwhile borax and charcoal dust in a volume ratio of 2:1 are added; then steel plates with venting holes are welded at two ends of the shaft sleeve for sealing; the sealed shaft sleeve is placed in an electric furnace for heating, heat preservation and reheating, after the process of heat preservation, the shaft sleeve is taken out from the electric furnace in a state of maintaining a horizontal axis; then the shaft sleeve is sleeved and clamped on a taper clamp head of a casting machine, a copper liner is evenly solidified in the process of rotating, a cooling system is opened for cooling, the shaft sleeve is demounted after rotating back for 3 minutes in a cooling state, the steel plates at the two ends of the shaft sleeved are cut out by a cutting knife in a lathe, and centrifugal pressure casting of the copper lining bearing is completed. The centrifugal pressure casting process of a copper lining bearing has the advantages of being simple in process, reliable in quality, saving in copper materials, and high in efficiency.

Description

A kind of centrifugal casting technique of brass bearing

Technical field

The present invention relates to Machining Technology field, especially a kind of centrifugal casting technique of brass bearing.

Background technology

All power transmission shafts that turns round under high speed or heavy load, all require its sliding bearing that certain bearing capacity, wearability and stationarity are arranged, in order to save the axle bush material and to reduce the bearing volume, be all generally that axle bush is cast directly on brearing bore now, but use traditional moulding pouring procedure, need to strengthen bush thickness, also can cause the number of drawbacks such as pore, gage distortion, not only do not reach the purpose of saving the axle bush material, and its process is complicated backward, is difficult to reach quality requirement.

Summary of the invention

The object of the present invention is to provide a kind of centrifugal casting technique of brass bearing, reliable by the bearing quality that this technique is made.

Technical scheme of the present invention is: a kind of centrifugal casting technique of brass bearing, and its step: first will be by the sleeve outer circle chamfering that manufactures and designs, its diameter of bore determines by the external diameter that equals brass, inner bore surface roughness is Ra10, and cleans endoporus with gasoline; Then add cast bronze in endoporus, its weight equals by cast volume calculated weight and allowance sum, also adding simultaneously volume ratio is borax and the charcoal powder of 2:1, borax adds front need through 100 ℃ of oven dry and is incubated 20～30 minutes, and charcoal powder adds front need through 320 ℃ of oven dry and is incubated 20～30 minutes; Then the steel plate that has air-vent of burn-oning at axle sleeve two ends respectively seals; The axle sleeve of sealing mouth is put into electric furnace be heated to 920 ℃ ± 10 ℃, be incubated and be heated to 1100 ℃ ± 10 ℃ after 40～50 minutes again, after being incubated 40～45 minutes, axle sleeve takes out from electric furnace under the state that keeps its axis horizontal; Again with the axle sleeve clamping on the conical chuck of casting machine, brass is evenly solidified, open hydraulic means, make tailstock to left dislocation lifting axe cover, starter motor, drive main shaft and axle sleeve with 1400～1500 rev/mins of revolutions, after having turned 15～35 seconds, the unlatching cooling system carries out cooling, turns round under the state of cooling after 3 minutes again and unloads Lower shaft sleeve, prescind the steel plate at axle sleeve two ends on lathe with cutter, the centrifugal casting technique of brass bearing is completed.

The invention has the advantages that: technique is simple, reliable in quality, saving copper material, efficient are high.

Description of drawings

Fig. 1 is the centrifugal casting process equipment connection layout of a kind of brass bearing of the present invention.

The specific embodiment

below in conjunction with accompanying drawing, the present invention is described in further detail: a kind of centrifugal casting technique of brass bearing, it is characterized in that: first will be by the outer rounded corner of axle sleeve 6 that manufactures and designs, its diameter of bore is according to large 2～6 ㎜ of copper layer thickness car of brass 8, inner bore surface roughness is Ra10, and cleans endoporus with gasoline, then add the cast bronze ZQSnPb30 that calculates and comprise the required weight of allowance by the cast volume in endoporus, also adding simultaneously the volume ratio through 100 ℃ of oven dry is the borax of 2:1 and the charcoal powder of 320 ℃ of oven dry, then the steel plate 4 that has air-vent 9 of burn-oning at axle sleeve 6 two ends respectively seals, and the size of pore 9 should be advisable to guarantee that the copper liquid that melts does not overflow and can breathe freely, the axle sleeve 6 of sealing mouth is put into electric furnace be heated to 920 ℃ ± 10 ℃, be incubated and be heated to 1100 ℃ ± 10 ℃ after 40～50 minutes again, level is taken out from electric furnace after being incubated 40～45 minutes, again axle sleeve 6 clampings are solidified brass 8 on the conical chuck 5 on casting machine 2, its process of setting is: open hydraulic means 11, tailstock 10 is moved to the left, thereby hold out against axle sleeve 6, restart motor 1, motor 1 drives main shaft 3, conical chuck 5 and axle sleeve 6 turn round with 1400～1500r/min, liquid brass 8 is in this rotating process, under the effect of centrifugal force, got rid of equably and solidified on the inner hole wall that sticks to axle sleeve 6, after having turned 15～35 seconds, opening cooling system 7 carries out cooling, turn round again under the state of cooling after 3 minutes and unload Lower shaft sleeve 6, prescind the steel plate 4 at axle sleeve 6 two ends with cutter on lathe, the centrifugal casting technique of brass bearing is completed.

Claims

1. the centrifugal casting technique of a brass bearing, its step: first will be by the outer rounded corner of the axle sleeve that manufactures and designs (6), its diameter of bore determines by the external diameter that equals brass (8), inner bore surface roughness is Ra10, and cleans endoporus with gasoline, then add cast bronze in endoporus, its weight equals by cast volume calculated weight and allowance sum, also adding simultaneously volume ratio is borax and the charcoal powder of 2:1, borax adds front need through 100 ℃ of oven dry and is incubated 20～30 minutes, and charcoal powder adds front need through 320 ℃ of oven dry and is incubated 20～30 minutes, then the steel plate (4) that has air-vent (9) of burn-oning at axle sleeve (6) two ends respectively seals, the axle sleeve (6) of sealing mouth is put into electric furnace be heated to 920 ℃ ± 10 ℃, be incubated and be heated to 1100 ℃ ± 10 ℃ after 40～50 minutes again, after being incubated 40～45 minutes, axle sleeve (6) takes out from electric furnace under the state that keeps its axis horizontal, again with axle sleeve (6) clamping on the conical chuck (5) of casting machine (2), brass (8) is evenly solidified, open hydraulic means (11), make tailstock (10) to left dislocation lifting axe cover (6), starter motor (1), drive main shaft (3) and axle sleeve (6) with 1400～1500 rev/mins of revolutions, after having turned 15～35 seconds, opening cooling system (7) carries out cooling, turn round again under the state of cooling and unload Lower shaft sleeve (6) after 3 minutes, prescind the steel plate (4) at axle sleeve (6) two ends with cutter on lathe, the centrifugal casting technique of brass bearing is completed.