CN102312055B

CN102312055B - Anti-deformation method of flat casting

Info

Publication number: CN102312055B
Application number: CN 201110295417
Authority: CN
Inventors: 张丙岩
Original assignee: Shenyang Liming Aero Engine Group Co Ltd
Current assignee: AECC Shenyang Liming Aero Engine Co Ltd
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2013-02-27
Anticipated expiration: 2031-09-30
Also published as: CN102312055A

Abstract

The invention relates to an anti-deformation method of a flat casting. By arranging one or several technological shores, bending-resistant ribs, and technological salient points during casting, and through deformation automatic correction after shaping of a casting, the method can produce the qualified casting. The anti-deformation measure of the method and the casting shaping in one body occur simultaneously, with no need for manual cold correction or hot correction. Meanwhile, a fluorescence or coloring inspection after correction can be omitted, thus greatly reducing the cost and enhancing the casting qualification rate.

Description

A kind of Anti-deformation method of flat casting

Technical field

The invention belongs to the sand mold casting technical field, particularly a kind of Anti-deformation method of flat casting.

Background technology

Large two dimensional structure foundry goods metamorphism very easily occurs in casting, heat treatment process, and deformation extent is serious, the routine techniques means are to adopt the auxiliary mould anchor clamps to prevent casting deformation, expense is many, the problems such as delivery cycle are produced in prolongation but the manufacturing anchor clamps exist, thermal treatment is come out of the stove and is proofreaied and correct unfavorable operation factors and operate miss, the crackle hidden danger etc. that also have hot environment in addition, cold sizing or thermal recalibration all must guarantee certain skills involved in the labour simultaneously secondary fluorescence or colour check(test) operation, and qualification rate is lower.

Summary of the invention

In casting or heat treatment process, under the factor affecting such as the heat affected zone of the larger weak point of wall thickness variation, final set and foundry goods convergent force, on-fixed core, easily produce the defective of distortion for the plate class casting of existing large two dimensional structure, the invention provides a kind of Anti-deformation method of flat casting, by technique pillar stiffener, counter-bending rib, technique salient point are set in the cast casting process, be out of shape correction behind the casting forming again and obtain qualified foundry goods, the concrete technology step is as follows:

1) hollow position arranges a place or many places technique pillar stiffener in the middle of foundry goods, and height is concordant with the large plane of foundry goods, and technique supports

Column diameter coupling casting dimension guarantees enough flexural strengths, all technique pillar stiffeners usually after heat treating castings, send before processing remove, special yielding thin-section casting remains into machining finish before removal;

2) at foundry goods yielding position internal surface and/or outside surface counter-bending rib is set, counter-bending rib thickness is got foundry goods basic framework size, and guarantees to be convenient to remove;

3) the large uniform plane in bottom of preparing the thermal treatment horizontal positioned at foundry goods arranges false boss, and the false boss width is near casting section thickness, and the salient point of height and foundry goods is consistent, makes foundry goods depression position and all the other large planar technology boss height polishings;

4) press former horizontal reference scribing inspection after the casting, mark sea line in one week of false boss, remove the false boss surplus and obtain an ideal plane, local little surplus distortion is adjusted this position false boss height by processing and is revised, and the corrected altitude of false boss equals this position deflection.

The invention has the beneficial effects as follows: the method is that preventing deformation measure and foundry goods are simultaneously integrally formed, does not need manual cold sizing or thermal recalibration, and fluorescence or colour check(test) after also not needing to proofread and correct have greatly reduced cost and improved casting qualified rate.

Description of drawings

Fig. 1 is the casting structure schematic diagram of the embodiment of the invention;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the upward view of Fig. 1;

Among the figure: the yielding position of 1 foundry goods, 2 counter-bending ribs, 3 technique pillar stiffeners, 4 false bosses.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

Anti-deformation method of flat casting provided by the invention, for the yielding position 1 of foundry goods of structure as shown in Figure 1, the preventing deformation concrete technology step of implementing is as follows:

1) hollow position arranges two place's technique pillar stiffeners 3 in the middle of foundry goods, height is concordant with the large plane of foundry goods, technique pillar stiffener 3 diameters are selected according to the foundry goods size, guarantee enough flexural strengths, the formation center subsides when preventing foundry goods roughing or thermal treatment, all technique pillar stiffeners 3 are observed itself and platform gap after thermal treatment, remove after the machining that does not deform finishes;

2) at the yielding position of foundry goods outside surface counter-bending rib 2 is set, counter-bending rib 2 thickness are got foundry goods basic framework size,

And guarantee to be convenient to remove;

3) prepare the large plane layout false boss 4 in bottom of thermal treatment horizontal positioned at foundry goods, false boss 4 width are near casting section thickness, and the salient point of height and foundry goods is consistent, makes highly polishings of the large planar technology boss 4 of foundry goods depression position and all the other;

4) press former horizontal reference scribing inspection after the casting, mark sea line in 4 one weeks of false boss, remove the false boss surplus and obtain an ideal plane, local little surplus distortion is adjusted high 4 degree of this position false boss by processing and is revised, the position that is bent upwards keeps large as far as possible plane, and boss height 4 is constant on one side, reduce the other side false boss 4 height, the height of middle process boss 4 is reduced at reclinate position, and the corrected altitude of false boss 4 equals this position deflection.

After revise adjusting foundry goods placed and prepare thermal treatment on the cast iron platform, privileged sites, discontinuous position auxiliary weight, the weight set-point selects the below that the position of technique point of suppon is arranged.By the enforcement of above-mentioned anti-deformation method, the metamorphism of foundry goods can be restored in heat treatment process automatically.

Claims

1. Anti-deformation method of flat casting is characterized in that: by technique pillar stiffener, counter-bending rib, false boss are set in the cast casting process, are out of shape behind the casting forming to revise again and obtain qualified foundry goods, the concrete technology step is as follows:

1) hollow position arranges a place or many places technique pillar stiffener in the middle of foundry goods, and height is concordant with the large plane of foundry goods, and technique pillar stiffener diameter coupling casting dimension guarantees enough flexural strengths;

3) prepare the large plane layout false boss in bottom of thermal treatment horizontal positioned at foundry goods, the false boss width is near casting section thickness, and the salient point of height and foundry goods is consistent, makes foundry goods depression position and all the other large planar technology boss height polishings;