WO2013083061A1

WO2013083061A1 - Method for manufacturing fully-integrated core of side frame

Info

Publication number: WO2013083061A1
Application number: PCT/CN2012/086079
Authority: WO
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: 南车长江车辆有限公司
Priority date: 2011-12-08
Filing date: 2012-12-06
Publication date: 2013-06-13
Also published as: CN102441647A

Abstract

A method for manufacturing a fully-integrated core of a side frame, the method comprising the following steps: firstly, according to the requirements for a side frame casting process, manufacturing an integrated core box integrating an outer hook (1) inner cavity structure comprising a side frame, a triangular hole (2) inner cavity structure and a central square frame (3) inner cavity structure; then, with a core shooter and the integrated core box matched up, completing the actions of mold matching, sand filling, sand jetting, hardening, mold opening and core jacking to shoot an integrated core at one time; and lastly, manually treating the surface of the integrated core. The integrated core manufactured by the above core manufacturing process has a smooth surface, and can effectively avoid casting rags and burrs due to the use of a multi-element combined sand core, thus improving the internal quality of a casting piece and reducing working intensity.

Description

Side frame full integral core manufacturing method

The invention relates to the technical field of manufacturing a railway truck side frame sand core. Background technique

The side frame is an important part of the railway wagon. It is a thin-walled shell structure and is made of low alloy steel. In the design of railway freight car bogies, the side frames and bolsters are the main components and the main force parts. The railway trucks are operating under different conditions, and the side frames have to withstand various tests.

With the development of China's railway freight cars in the direction of high-speed and heavy-duty, the quality and comprehensive performance requirements of important parts such as side frames are higher. Therefore, in order to meet the development needs of railway wagons in the future, it is necessary to improve the product quality of important parts such as side frames. Comprehensive performance to ensure the reliability and safety of high-speed and heavy-duty operation of railway wagons.

At present, the side frames for railway wagons in China are produced by casting method. The side frames are made of integral core. The casting process of each manufacturing enterprise is different. The overall core splitting method is different, but the overall core and central box sand core of each enterprise It is divided into two parts or three parts. This will inevitably have the whole core and the central box sand core combined to form the side frame inner cavity structure. The side frame inner cavity cannot be formed by a sand core, and the sand core and the sand core joint are prone to be draped. Casting defects such as seams, cracks, and blisters increase the amount of finishing work, reduce production efficiency, reduce product quality, and pose safety hazards. Casting defects such as crevices, cracks, and blisters have plagued sideframe manufacturers. Therefore, it is necessary to improve the side frame casting technology and find a more reasonable manufacturing technique. Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the existing side frame casting technology, and to provide a side frame full-core manufacturing method, which effectively improves the quality and comprehensive performance of the side frame products.

In order to solve the above technical problem, the technical solution of the present invention includes the following steps:

According to the requirements of the side frame casting process, the outer hook inner cavity structure including the side frame and the triangular hole internal cavity joint are prepared. Integrated core box with integrated inner cavity structure

Then, the core shooting machine cooperates with the integral core box to complete the mold clamping, sanding, sand shooting, hardening, mold opening and core core action, and the whole core is shot out at one time.

Finally, the entire core surface is handled manually.

In order to ensure the overall uniform cooling effect, corresponding to the thicker part of the overall core, the outer cold iron and chromite ore are adsorbed by the magnetic beads on the upper model of the integral core box.

The inner cavity quality and comprehensive performance requirements of the side frame products of the present invention are very high. To meet the requirements of safe operation of the product, the casting process is a sand core forming all internal cavity structures of the side frame, that is, the whole integral core process, and the whole integral core includes The inner cavity structure of the outer groove, the inner cavity structure of the triangular hole and the inner cavity structure of the central box.

The manufacturing technology of the invention is flexible and can produce the integral core according to the requirements of the product process, and the overall core surface is smooth, which can effectively avoid the casting flash, crevice, and blisters brought by using the diversified combined sand core. Such as casting defects, improve the intrinsic quality, comprehensive performance of the castings, and reduce the work intensity. It has high economic and social value. DRAWINGS

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic view of an integral core structure core box according to the present invention. detailed description

Firstly, according to the requirements of the side frame casting process, an integral core box including an outer hook inner cavity structure of the side frame, a triangular hole inner cavity structure, and a central box inner cavity structure is integrated. As shown in Fig. 1, the left and right outer hooks 1, the triangular holes 2 and the central square 3 are integrally formed to form an integral core.

Then, the core shooting machine cooperates with the integral core box to complete the mold clamping, sanding, sand shooting, hardening, mold opening and core core action to shoot the whole core at one time. The central frame of the integral core is the mounting surface of the wear plate. The flatness of the mounting surface must be checked by the special template. Because the wall thickness of the column is relatively small and there is a small concave and convex structure locally, all the structures of this surface are formed by a column surface block. ; the majority of the core is used Triethylamine hardened resin sand, thicker than the average thickness, using external cold iron, chromite ore, outer cold iron and chromite sand core are adsorbed on the upper mold of the mold by magnetic beads, and the core shooter cooperates with the mold , complete the mold clamping, sanding, sand shooting, hardening, mold opening, top core and other actions to shoot the whole core at a time. Finally, manually handle the whole core surface for overall inspection and partial grinding. The original core combination of the original central box sand core and the triangular hole and the outer hook is avoided, which leads to casting defects such as crevices, cracks and blisters.

When used for side frame casting, the whole core is stored at the designated position, and the robot automatically scans, identifies, grabs, and lowers the core to ensure the accuracy of the lower core and product quality.

The scope of the present invention is not limited to the embodiments described above, and it is obvious that those skilled in the art can make various modifications and changes to the invention without departing from the scope and spirit of the invention. Such changes and modifications are intended to be included within the scope of the appended claims.

Claims

Claim

A method for manufacturing a full-body core of a side frame, comprising the steps of:

Firstly, according to the requirements of the side frame casting process, an integral core box including an outer hook inner cavity structure of the side frame, a triangular hole inner cavity structure, and a central box inner cavity structure is integrated;

Then, the core shooter cooperates with the integral core box to complete the mold clamping, sanding, sand shooting, hardening, mold opening, and core core action to shoot the whole core at one time;

Finally, the entire core surface is handled manually.

2 . The method of manufacturing a full-body core of a side frame according to claim 1 , wherein when the core shooter cooperates with the integral core core box, corresponding to a thick portion of the overall core, the outer cooling is performed by magnetic beads. Iron and chromite ore are on the upper model of the integral core box.