CN102554135A

CN102554135A - Swinging type steering frame swing bolster sand core and manufacturing method thereof

Info

Publication number: CN102554135A
Application number: CN2012100512617A
Authority: CN
Inventors: 焦辉; 何氢玲; 旷丹峰; 苟春林; 王连华; 宋仲明; 张厚胜; 郑志坚; 熊火顺; 董中友; 吴文俊; 刘涛
Original assignee: CSR Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2012-07-11
Also published as: WO2013127218A1

Abstract

The invention relates to a swinging type steering frame swing bolster sand core for a rail wagon and a manufacturing method thereof. The swinging type steering frame swing bolster sand core is characterized in that a fish belly inner cavity structure, a lightening hole structure, a pull rod hole structure, an inverse V-shaped surface inner cavity structure and an end part structure below a core disc of the swing bolster sand core are integrated into the whole sand core. The manufacturing method comprises the following steps of: manufacturing an integrated core box comprising the fish belly inner cavity structure, the lightening hole structure, the pull rod hole structure, the inverse V-shaped surface inner cavity structure and the end part structure according to the swing bolster casting process requirement; cooperating the whole sand core box with a core shooter; closing the die, adding sand, shooting sand, hardening, opening the die and ejecting the core to shoot the sand core at one step; and processing the surface of the whole core manually. The swing bolster sand core has smooth surface, can effectively avoid casting flash and fins caused by diversified combined sand core, improves inherent quality of cast and reduces working strength.

Description

Swing type bogie bolster core and manufacturing approach

Technical field

The present invention relates to railway freight-car with swing type bogie bolster production technical field.

Background technology

Bolster is the railway freight-car important spare part, is the thin-walled shell construction, and material is a low-alloy steel.In the railway goods train bogie design, bolster and bolster are main component part, also are main stressed parts, and railway freight-car is in service under different situations, and bolster must sustain various tests.

Along with the China railways lorry develops to the high-speed overload direction; Require higher to important spare part product quality such as bolster and combination property; Therefore; Be railway freight-car development need after satisfying, must improve product quality, the combination property of important spare parts such as bolster, thereby guarantee railway freight-car high-speed overload reliability of operation, security.

Railway freight-car all adopts core as die casting production with bolster both at home and abroad.At present; The external split core casting technique that adopts; Domestic manufacturing enterprise produces bolster and adopts the integral core casting technique, and each manufacturing enterprise is formed fish belly structure, tie rod hole structure, Eight characters face structure by an integral sand core, but each enterprise's integral core and end core separated into two parts or three parts are done; Certainly will there be integral core and end core to combine like this and form the bolster inner-cavity structure; The bolster inner chamber can not pass through a core moulding, and core and core junction are prone to casting flaws such as fash, crackle, sand holes, increases later stage housekeeping amount, reduces production efficiency, reduces product quality, brings potential safety hazard.Casting flaws such as fash, crackle, sand holes perplex bolster manufacturing enterprise always, therefore, are necessary the bolster core manufacturing technology in the bolster casting is improved, and find out more reasonably manufacturing technology of a cover.

Summary of the invention

Technical problem to be solved by this invention is the deficiency that has a kind of bolster foundry engieering now in order to overcome, and a kind of swing type bogie bolster core and manufacturing approach are provided, and effectively improves bolster product quality and combination property.

For solving the problems of the technologies described above; The present invention provides a kind of swing type bogie bolster core; It is characterized in that; Comprise fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and end construction under the cartridge face, the integral sand core of said fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and the integrated moulding of end construction.

The present invention provides the manufacturing approach of said railway freight-car bolster core simultaneously, may further comprise the steps:

Require to make the incorporate integral core core box of fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and end construction under the cartridge face according to the bolster casting technique,

Core shooter is cooperated with the integral core core box, carries out matched moulds, adds sand, penetrates sand, sclerosis, die sinking, plunger tip, the core overall time is penetrated made,

The integral core surface is handled in manual work.

For guaranteeing that integral core has consistent cooling effect, when said core shooter cooperates with the integral core core box, about external chill, chromite sand and the arbor that plays booster action be positioned in the core box thickness locate greater than the part of average thickness.

The inventive method adopts the overall time moulding process, and coremaking process automation degree is high, can effectively reduce the influence of human factor to the core quality.The bolster core smooth surface that makes; Avoided using diversification to make up casting overlap, fash that core brings, the core cavity smooth surface is smooth-going, reduces core cavity surface burning into sand, pore, crack defect significantly; Alleviate the casting cleaning working strength, improve casting quality.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment technical scheme of the present invention is further specified.

Fig. 1 is the structural representation of the bolster integral core of the present invention's making.

The specific embodiment

Manufacturing approach of the present invention is: at first, require to make the incorporate integral core core box of fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and end construction under the cartridge face according to the bolster casting technique,

Then, the integral core core box is cooperated with core shooter, external chill, chromite sand and the arbor that plays booster action are positioned in the core box up and down thickness greater than the place, part of average thickness.

Again, carry out matched moulds, add sand, penetrate sand, sclerosis, die sinking, plunger tip, the core overall time penetrated makes.Core shooter adopts the triethylamine hardening resin sand.

At last, carry out the integral core surface treatment by manual work, processing comprises whole inspection, detail sanding.

Prepared bolster integral core is as shown in Figure 1, and the fish belly facing sand core 6 under the cartridge face 5, lightening core core 3, tie rod hole core 4, end core 1, Eight characters facing sand core 2 are linked to be bolster integral core of formation.Avoid being connected each other of a plurality of split cores of prior art, caused product casting flaws such as fash, crackle, sand holes to occur.

Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.

Claims

1. swing type bogie bolster core; Comprise fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and end construction under the cartridge face; It is characterized in that the integral sand core of said fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and the integrated moulding of end construction.

2. the manufacturing approach of the said swing type bogie bolster of claim 1 core is characterized in that, may further comprise the steps:

Require to make the integral core core box that comprises fish belly inner-cavity structure, lightening core structure, tie rod hole structure, Eight characters face inner-cavity structure and end construction according to the bolster casting technique;

The integral core core box is cooperated with core shooter, carry out matched moulds, add sand, penetrate sand, sclerosis, die sinking, plunger tip, the core overall time is penetrated made;

At last, carry out the integral core surface treatment by manual work.

3. according to the manufacturing approach of the said swing type bogie bolster of claim 2 core; It is characterized in that; When said core shooter cooperates with the integral core core box, external chill, chromite sand and the arbor that plays booster action are positioned in the core box up and down thickness greater than the place, part of average thickness.