CN103736937A

CN103736937A - Anti-crack rib for thin-walled box steel castings

Info

Publication number: CN103736937A
Application number: CN201310734938.1A
Authority: CN
Inventors: 陆寿罩; 汤建湘; 曾立严; 钟玉祥; 黄启贤
Original assignee: LIUZHOU JIANGHANG INDUSTRY AND TRADE Co Ltd
Current assignee: LIUZHOU JIANGHANG INDUSTRY AND TRADE Co Ltd
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-04-23

Abstract

The invention relates to an anti-crack rib for thin-walled box steel castings. Aiming at a problem that steel castings are scrapped due to the occurrence of hot cracks because the stress acts on an inner cavity in the process of casting, the invention adopts the technical scheme as follows: an anti-crack rib is entirely cast at the joint of the two faces of a steel casting matrix, the radian of the anti-crack rib at the corner of the two side faces is R3-R5mm, the radian of the anti-crack rib at the corner of the side face and the bottom surface is R5-R8mm, the height of the anti-crack rib is 15-20 mm, and the thickness of the anti-crack rib is 0.3 time as large as that of the matrix. The anti-crack rib disclosed by the invention eliminates the cracking phenomena, and has the beneficial effects of simple structure, easy process, low cost, and the like.

Description

The cracking strip of thin-walled box steel-casting

Technical field

The present invention relates to casting field, especially thin-walled box steel-casting.

Background technology

In thin-walled box Steel Castings, often because foundry goods cannot shift at solidification shrinkage stage stress, all act on foundry goods body, at inner chamber, there will be a large amount of fire checks, as fruit structure too seal or technique clearance hole little, just cannot adopt remedial measures to inner chamber crackle, thereby cause foundry goods cannot reprocess and scrap because of crackle.General designer does not also consider the feasibility of casting technique in two wall junctions of foundry goods, conventionally do not design the cracking strip of junction, although anticracking can have multiple style, the cracking strip of thin-walled box steel-casting is also had no way of using for reference.

Summary of the invention

Object of the present invention prevents that for providing a kind of thin-walled box steel-casting inner chamber from producing the cracking strip of fire check.

The technical solution used in the present invention is as follows:

In junction, thin-walled box steel-casting matrix two sides, be that corner integral body casts out cracking strip, the cracking strip radian of corner, two sides is R3-R5mm, the cracking strip radian of side and corner, bottom surface is R5-R8mm, the height of cracking strip is 15-20mm, and cracking strip thickness is 0.3-0.4 times of steel-casting matrix thickness.Distance between adjacent two muscle is 30-40mm.

Technique scheme has solved thin-walled box core cavity and has produced ardent defect.This technical scheme is suitable for all kinds of difformities and structural casting.

The present invention has simple in structure, and technique is easily gone, and cost is low, is applicable to the beneficial effect of common various structures easy to crack.

Accompanying drawing explanation

For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein

Fig. 1 is thin-walled box steel-casting cracking strip structure cross-sectional schematic of the present invention.

In figure, parts name label is: 1-box steel-casting matrix, 2-cracking strip, the cracking strip radian of 3-side and corner, bottom surface, corner, 4-two sides cracking strip radian, 5-cracking strip thickness, the adjacent two cracking strip distances of 6-, 7-cracking strip height, 8-matrix thickness.

The specific embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

Embodiment 1

A thin-walled box steel-casting, because foundry goods is when the solidification shrinkage, foundry goods hindered contraction, because stress is excessive, and there are a large amount of fire checks at inner chamber, and box foundry goods only to have a diameter be the technique clearance hole of about 180mm, cannot place under repair to inner chamber, in junction, inner chamber matrix two sides integral body, cast out cracking strip for this reason, at corner, two sides radian, be 3mm, the radian of side and corner, bottom surface is 5mm, and cracking strip height is 15mm, width is 0.3 times of matrix thickness, and adjacent two muscle distances are 30mm.

Embodiment 2

Overall structure is identical with upside, at corner, two sides radian, is 5mm, and the radian of side and corner, bottom surface is 8mm, and cracking strip height is 20mm, cracking strip thickness is matrix thickness 0.4 times, adjacent two muscle distances are 40mm.

Through evidence, above both sides have all reached the generation that prevents fire check.

Claims

1. the cracking strip of thin-walled box steel-casting, it is characterized in that: in junction, thin-walled box steel-casting matrix two sides, be that corner integral body casts out cracking strip, the cracking strip radian of corner, two sides is R3-R5mm, the cracking strip radian of side and corner, bottom surface is R5-R8mm, the height of cracking strip is 15-20mm, and cracking strip thickness is 0.3-0.4 times of steel-casting matrix thickness.

2. the cracking strip of thin-walled box steel-casting according to claim 1, is characterized in that: the distance between described adjacent two muscle is 30-40mm.