CN102527946A

CN102527946A - Crossed rod type truck bolster sand core and manufacture method

Info

Publication number: CN102527946A
Application number: CN2012100513696A
Authority: CN
Inventors: 宋仲明; 何氢玲; 严建军; 旷丹峰; 王连华; 苟春林; 汪焱; 熊火顺; 张厚胜; 郑志坚; 吴文俊
Original assignee: CSR Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2012-07-04
Also published as: WO2013127219A1

Abstract

The invention relates to a crossed rod type truck bolster sand core and a manufacture method, wherein a fish belly cavity structure, a water leakage hole structure, a lightening hole structure, a draw bar hole structure, a splayed-surface cavity structure and an end part structure under a center plate of the truck bolster sand core integrally form the whole sand core. The manufacture method comprises the following steps that: an integrally whole core box comprising the fish belly cavity structure, the water leakage hole structure, the lightening hole structure, the draw bar hole structure, the splayed-surface cavity structure and the end part structure are manufactured according to the casting process requirements of the bolster; the whole core box is matched with a core shooter to perform die assembly, sand adding, sand shooting, hardening, die sinking and core ejection, so that the sand core can be wholly shot out at a time; and the whole core is subjected to surface treatment by manual work. The bolster sand core manufactured by the invention has a smooth surface, the problems of casting flash and fin brought about by using a diversified combination sand core can be effectively avoided, the internal quality of casting is improved, and the working intensity is alleviated.

Description

Intersection rod-type truck bolster core and manufacturing approach

Technical field

The present invention relates to railway freight-car with intersecting rod-type truck bolster core manufacturing technology 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 intersection rod-type truck 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 intersection rod-type truck bolster core; It is characterized in that; Comprise fish belly inner-cavity structure, leaking hole 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, leaking hole 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 intersection rod-type truck bolster core simultaneously, may further comprise the steps:

Require to make the incorporate integral core core box of fish belly inner-cavity structure, leaking hole 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, leaking hole 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 core 6 under the cartridge face 8, last leaking hole 7, following leaking hole 3, lightening core core 4, tie rod hole core 5, 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. one kind intersects rod-type truck 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, leaking hole 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 intersection rod-type of claim 1 a truck bolster 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, leaking hole 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 intersection rod-type of claim 2 truck bolster 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.