CN100450667C

CN100450667C - Sliding roll neck casting mould method in use for casting large supporting roller of integral casting cast steel

Info

Publication number: CN100450667C
Application number: CNB2007100719217A
Authority: CN
Inventors: 刘玉华; 白云龙; 张亚才
Original assignee: China First Heavy Industries Co Ltd
Current assignee: China First Heavy Industries Co Ltd
Priority date: 2007-03-17
Filing date: 2007-03-17
Publication date: 2009-01-14
Anticipated expiration: 2027-03-17
Also published as: CN101049628A

Abstract

A moulding method of the slide roller neck for casting a large bearing steel roller includes such steps as covering a sand layer respectively on the inner surfaces of internal and external moulds, hardening, putting a pad on the top end face of external mould, putting the internal mould on said pad and then in external mould, blocking the lower end of a gap between internal and external moulds, filling liquid in said gap, drying in kiln, aligning the mould with the iron mould of roller, putting upper sand case on the internal mould, casting the roller, and removing said pad.

Description

A kind of large-scale integral cast steel support roller casting slip roll neck casting method

Technical field

The present invention relates to the casting of a kind of large-scale integral cast steel support roller with slip roll neck casting method, specifically in the casting of large-scale integral cast steel support roller,, belong to the Casting Technology field for reducing the device that foundry goods is obstructed when the solidification shrinkage.

Background technology

At present, the slip roll neck casting mold of known large-scale integral cast steel support roller casting usefulness, all be to utilize body of roll swage to be external mold, form, when carrying out the casting mold assembling by inside and outside mould, the temperature that body of roll swage is higher because of preheating has, therefore, slip roll neck internal mold is when packing body of roll swage inner chamber into, and is not easy to operate, be difficult to guarantee that inside and outside mould rigging position is accurate, and the slit between the inside and outside mould is not easy to also stop up; Owing to above reason, the effect of slip roll neck casting mold was lost efficacy and generation badly bleeding accident.

Summary of the invention

In order to overcome the deficiency of above-mentioned technology, the invention provides a kind of large-scale integral cast steel support roller casting slip roll neck casting method, this large-scale integral cast steel support roller casting can not only be increased work efficiency with slip roll neck casting method, and can guarantee that inside and outside mould rigging position is accurate, do not produce the shortcoming that the effect of slip roll neck casting mold was lost efficacy and the badly bleeding accident is taken place, easy to operate, safety.

The technical solution adopted for the present invention to solve the technical problems is: cover layer of sand at slip roll neck external mold inner surface, cover layer of sand at slip roll neck internal mold inner surface, after slip roll neck external mold inner surface covers layer of sand and slip roll neck internal mold inner surface and covers the layer of sand sclerosis, lay cushion block in slip roll neck external mold upper surface, laying slip roll neck internal mold on the cushion block enters in the slip roll neck external mold, stop up the lower end in slit between slip roll neck internal mold and the slip roll neck external mold layer of sand earlier, from upper end, the slit between slip roll neck internal mold and slip roll neck external mold layer of sand filling liquid material, that kiln drying on the slip roll neck casting mold that combines is dry again; The slip roll neck external mold bottom that drying is good aligns with body of roll swage upper end and lays, and cope is placed in the top of slip roll neck internal mold again; Behind the cast roll foundry goods, cushion block is removed; Adopt independent external mold, cover self-hardening sand at the external mold inner surface, cushion block is put in the external mold upper end in the sclerosis back, and the internal mold that makes is packed into; At this moment, inside and outside mould all is a cold mould, is convenient to operation, guarantees that easily inside and outside die clearance is even; Bottom, inside and outside die slot crack is stopped up with asbestos cord and refractory clay, filled liquid material from the upper end, slit again; It is dry that casting mold is advanced kiln drying; After the dry end of casting mold, the fluent material of filling solidifies; After the cast, slip roll neck internal mold shrinks with foundry goods, makes the cooling of roll neck place evenly, does not produce resistance.

The invention has the beneficial effects as follows: be applicable to the slip roll neck casting mold of large-scale integral cast steel support roller casting usefulness, can make the internal mold location, can avoid badly bleeding again; Reduce the resistance of foundry goods when solidification shrinkage, method of operating is easy, and cost is low.

Description of drawings

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

Fig. 1 is a kind of large-scale integral cast steel support roller casting of the present invention slip roll neck casting mold figure.

Among the figure 1, slip roll neck internal mold, 2, the layer of sand of slip roll neck internal mold, 3, the layer of sand of slip roll neck external mold, 4, slip roll neck external mold, 5, body of roll swage, 6, the roll foundry goods, 7, the slit between slip roll neck internal mold and the slip roll neck external mold layer of sand, 8, cushion block, 9, cope.

The specific embodiment

See also Fig. 1, cover layer of sand (3) at slip roll neck external mold (4) inner surface, cover layer of sand (2) at slip roll neck internal mold (1) inner surface, after slip roll neck external mold (4) inner surface covers layer of sand (3) and slip roll neck internal mold (1) inner surface and covers layer of sand (2) sclerosis, lay cushion block (8) in slip roll neck external mold (4) upper surface, laying slip roll neck internal mold (1) on the cushion block (8) enters in the slip roll neck external mold (4), stop up the lower end in slit (7) between slip roll neck internal mold and the slip roll neck external mold layer of sand earlier, from upper end, the slit (7) between slip roll neck internal mold and slip roll neck external mold layer of sand filling liquid material, that kiln drying on the slip roll neck casting mold that combines is dry again; Slip roll neck external mold (4) bottom that drying is good aligns with body of roll swage (5) upper end and lays, and cope (9) is placed in the top of slip roll neck internal mold (1) again; Behind the cast roll foundry goods (6), cushion block (8) is removed.

Claims

1, a kind of large-scale integral cast steel support roller casting slip roll neck casting method, it is characterized in that: cover layer of sand (3) at slip roll neck external mold (4) inner surface, cover layer of sand (2) at slip roll neck internal mold (1) inner surface, after slip roll neck external mold (4) inner surface covers layer of sand (3) and slip roll neck internal mold (1) inner surface and covers layer of sand (2) sclerosis, lay cushion block (8) in slip roll neck external mold (4) upper surface, laying slip roll neck internal mold (1) on the cushion block (8) enters in the slip roll neck external mold (4), stop up the lower end that slip roll neck internal mold and slip roll neck external mold inner surface cover slit between the layer of sand (7) earlier, cover upper end, slit (7) filling liquid material between the layer of sand from slip roll neck internal mold and slip roll neck external mold inner surface again, kiln drying on the slip roll neck casting mold that combines is dry; Slip roll neck external mold (4) bottom that drying is good aligns with body of roll swage (5) upper end and lays, and cope (9) is placed in the top of slip roll neck internal mold (1) again; Behind the cast roll foundry goods (6), cushion block (8) is removed.