CN102441647A

CN102441647A - Manufacturing method for fully-integrated core of side frame

Info

Publication number: CN102441647A
Application number: CN2011104053269A
Authority: CN
Inventors: 焦辉; 何氢玲; 苟春林; 王连华; 宋仲明; 张厚胜; 郑志坚; 旷丹峰; 刘涛; 董中友; 熊火顺; 吴文俊
Original assignee: CSR Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2011-12-08
Filing date: 2011-12-08
Publication date: 2012-05-09
Also published as: WO2013083061A1

Abstract

The invention relates to a manufacturing method for a fully-integrated core of a side frame. The method is characterized by comprising the following steps of: firstly, manufacturing an integrated core box which comprises a side frame and an outer hook inner cavity structure, a triangular hole inner cavity structure and a central pane inner cavity structure are integrated in the core box according to the requirements of a side frame casting process; secondly, completing mold matching, sand filling, sand jetting, hardening, mold opening and core jacking actions under the cooperated actions of a core shooter and the integrated core box to shoot an integrated core at one time; and lastly, manually processing the surface of the integrated core. Due to the adoption of a core manufacturing process disclosed by the invention, the surface of the manufactured integrated core is smooth, the phenomena of casting scrap rubber and joint flash caused by the use of a diverse combined sand core can be effectively avoided, the internal quality of a casting is increased, and the working strength is lowered.

Description

The full integral core manufacturing approach of a kind of bogie side frame

Technical field

The present invention relates to railway freight-car bogie side frame core manufacturing technology field.

Background technology

Bogie side frame 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, bogie side frame and bolster are main component part, also are main stressed parts, and railway freight-car is in service under different situations, and bogie side frame 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 bogie side frame 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 bogie side frame, thereby guarantee railway freight-car high-speed overload reliability of operation, security.

The China railways lorry all adopts casting method to produce with bogie side frame at present; Bogie side frame adopts the integral core manufacturing; Each manufacturing enterprise's casting technique is different, and integral core divides the core mode all different, but each enterprise's integral core and central square frame core separated into two parts or three parts are done; Certainly will there be integral core and central square frame core to combine like this and form the bogie side frame inner-cavity structure; The bogie side frame 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 bogie side frame manufacturing enterprise always, therefore, are necessary the bogie side frame foundry engieering is improved, and find out more reasonably manufacturing technology method of a cover.

Summary of the invention

Technical problem to be solved by this invention is the deficiency that has a kind of bogie side frame foundry engieering now in order to overcome, and provides a kind of bogie side frame full integral core manufacturing approach, effectively improves bogie side frame product quality and combination property.

For solving the problems of the technologies described above, technical scheme of the present invention may further comprise the steps:

Require to make outer crotch inner-cavity structure, delthyrium inner-cavity structure, the incorporate integral core core box of central square frame inner-cavity structure that comprises bogie side frame according to the bogie side frame casting technique,

Then, core shooter cooperates with the integral core core box, and accomplish matched moulds, add sand, penetrate sand, sclerosis, die sinking, plunger tip action make disposable the penetrating of integral core come,

At last, the integral core surface is handled in manual work.

For guaranteeing the cooling effect of integral uniform,, adsorb external chill, chromite sand on model on the integral core core box through magnetic bead corresponding to the thicker part of integral core.

The inner chamber quality of bogie side frame product involved in the present invention, combination property require very high; For satisfying the requirement of product safety operation; Casting technique is that a core forms all inner-cavity structures of bogie side frame; Be full integral core technology, full integral core has comprised outer crust ditch inner-cavity structure, delthyrium inner-cavity structure and central square frame inner-cavity structure.

Manufacturing technology of the present invention is flexible and changeable; Can produce satisfactory integral core by the product technological requirement; The integral core smooth surface that makes; Can effectively avoid the use of casting flaws such as casting overlap that diversification combination core brings, fash, sand holes, improve the internal quality of casting, combination property, alleviate working strength.Have very high economic worth and social value.

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 integral core structure core box sketch map that the present invention relates to.

The specific embodiment

At first, require to make outer crotch inner-cavity structure, delthyrium inner-cavity structure, the incorporate integral core core box of central square frame inner-cavity structure that comprises bogie side frame according to the bogie side frame casting technique.As shown in Figure 1, about outer crust collude 1, delthyrium 2 and central square frame 3 be linked to be an integral body, forms an integral core.

Then, core shooter cooperates with the integral core core box, accomplishes matched moulds, adds sand, penetrates sand, sclerosis, die sinking, plunger tip action make disposable the penetrating of integral core come.The central square frame column face of integral core is the wearing plate installed surface, and the flatness of installed surface must be through special-purpose model inspection requirements, and is less and local little concaveconvex structure arranged because of the column thickness rate of facing the wall and meditating, and adopts all structures of this face of column face loose piece formation; The most of triethylamine hardening resin sand that adopts of integral core; Greater than thicker local external chill, the chromite sand of adopting of average thickness, external chill and chromite core are adsorbed on the last model of mould through magnetic bead, and core shooter cooperates with mould; Accomplish matched moulds, add sand, penetrate sand, actions such as sclerosis, die sinking, plunger tip make disposable the penetrating of integral core; At last, the integral core surface is handled in manual work, carries out integral body inspection, detail sanding.Avoided of the integral core combination of original central square frame core, caused product casting flaws such as fash, crackle, sand holes to occur with delthyrium and outer crust hook-forming.

When being used for the bogie side frame casting, integral core is deposited at assigned address, robot automatic scan, identification, extracting, following core, thus guarantee core precision, product quality down.

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. the full integral core manufacturing approach of bogie side frame is characterized in that, may further comprise the steps:

At first, require to make outer crotch inner-cavity structure, delthyrium inner-cavity structure, the incorporate integral core core box of central square frame inner-cavity structure that comprises bogie side frame according to the bogie side frame casting technique;

Then, core shooter cooperates with the integral core core box, accomplishes matched moulds, adds sand, penetrates sand, sclerosis, die sinking, plunger tip action make disposable the penetrating of integral core come;

At last, the integral core surface is handled in manual work.

2. the full integral core manufacturing approach of bogie side frame according to claim 1 is characterized in that, when said core shooter cooperates with the integral core core box, corresponding to the thicker part of integral core, adsorbs external chill, chromite sand on model on the integral core core box through magnetic bead.