CN202779605U

CN202779605U - Crankcase combined model

Info

Publication number: CN202779605U
Application number: CN 201220464229
Authority: CN
Inventors: 谢许祥; 谢波; 尹华元
Original assignee: SICHUAN XIANGYE MECHANICAL CASTING Co Ltd
Current assignee: SICHUAN XIANGYE MECHANICAL CASTING Co Ltd
Priority date: 2012-09-13
Filing date: 2012-09-13
Publication date: 2013-03-13
Anticipated expiration: 2022-09-13

Abstract

The utility model designs a novel crankcase combined model comprising a base plate core, a main core located in the middle of the base plate core, exterior cores located at two sides of the base plate core and end cores located at two ends of the base plate core, wherein the base plate core is provided with a locating groove; the main core is provided with a locating basal plane and a bottom striking-off surface which is located in the locating groove, and the locating basal plane of the main core and the surface of the base plate core are located and fixed; and the exterior cores located at two sides of the base plate core, the end cores located at two ends of the base plate core and the base plate core are located and fixed through the surface of the base plate core. According to the utility model, a base plate core boss is omitted, so that the multi-sided matching of each core at a casting cavity is reduced; the casting burnt-on sand phenomenon caused by the abrasion of the base plate core boss can be avoided, and meanwhile, flashes caused by multiple fit clearances are reduced; and the efficiencies for subsequent burnt-on sand cleaning and flash polishing are also greatly increased.

Description

A kind of crankcase built-up pattern

Technical field

The utility model belongs to the casting mould design field, especially belongs to the metal casting mould design field, particularly a kind of crankcase built-up pattern.

Background technology

The engine crankcase manufacturing at first needs the casting of march axle box again crankcase to be carried out fine finishining, and the crankcase casting model is to consist of by the end face core combination at the outside core that comprises base plate core, rising head core, both sides and two ends is fixing.During existing crankcase moulding mould assembly, usually put first a base plate core on workbench, more main core, end face core, outside core are placed on the base plate core, and position fixing as the altitude location basal plane to main core, end face core, outside core with base plate core placed side; During mould assembly, because main core location basal plane is the face of strike-ofing when moulding, size is unstable, for guaranteeing to conform to core sizes such as end face core, outside cores accurate positioning, whether whether a kind of method is to adopt to have made one and make cubing than high piece, use the comparison spot size when checking main core laying state than high piece contourly to proofread and correct main core and place and meet the requirements with meeting than high piece; Another kind method is at the base plate core boss to be set, main core master core location basal plane is cooperated the location with boss, this structure has avoided using the weakness than high piece, but because foundry goods die cavity bottom surface forms multiaspect by base plate core positioning boss with main core, outside core, end face core and cooperates, casting has produced the many places fit clearance, and many places, foundry goods bottom surface overlap is just caused in these gaps when cast withstands shocks.Simultaneously, because base plate core positioning boss area is very narrow, in the carrying of base plate core, boss surface coating very easily grinds off when depositing, and causes the scab of foundry goods bottom surface.

Summary of the invention

The utility model has designed a kind of new built-up pattern according to the deficiency of existing crankcase casting modeling structure.Problem to be solved in the utility model provides a kind of accurate positioning, both avoid watering foundry goods can not accurately locate because of the face of strike-ofing and affect quality, can reduce again the crankcase casting built-up pattern structure of casting fin.

The utility model is achieved through the following technical solutions:

The crankcase built-up pattern comprises the base plate core, is positioned at main core, the outside core of both sides and the end face core at two ends at base plate core middle part, and it is characterized in that: described base plate core has detent.

Described main core has the face of strike-ofing of location basal plane and bottom, and the face of strike-ofing is arranged in detent, and main core location basal plane and base plate wicking surface location are fixing.

The end face core at the outside core of described both sides and two ends is fixing by base plate wicking surface and base plate core location.

The utility model crankcase built-up pattern comprises main core, the outside core of both sides and the end face core at two ends at base plate core, base plate core middle part at the base plate core detent being arranged, and the base plate wicking surface is base plate core plane of orientation; Usually the main core of casting has main core location basal plane and the main core face of strike-ofing, and the base plate wicking surface arranges locates basal plane with main core and cooperate, and the base plate wicking surface is placed main core, end face core and outside core, and the base plate wicking surface is as the altitude location datum level of main core, end face core and outside core; Main core is strike-off behind the face mould assembly in base plate core detent, do not contact with base plate core groove floor, also namely main core can its because of the main core of the uncertain impact of rear size of strike-ofing location.

During mould assembly, main core location basal plane is placed on the base plate locating surface, and the face of strike-ofing is arranged in detent; Then end face core bottom surface and outside core bottom surface are placed on the locating surface.The height of main core, end face core and outside core has guaranteed the height dimension of each core take base plate core locating surface as benchmark.

The utility model helpfulness: the utility model has been cancelled base plate core boss, has reduced the multiaspect of each core at foundry goods die cavity place and has cooperated; Foundry goods can because of base plate core boss wearing and tearing scab, not reduce the overlap that the many places fit clearance causes simultaneously; The efficient of postorder cleaning scab, polishing overlap also improves greatly.

Description of drawings

Fig. 1 is the utility model crankcase built-up pattern cross-sectional schematic;

Fig. 2 is the utility model base plate cored structure schematic diagram;

Fig. 3 is a kind of crankcase main cored structure schematic diagram of casting;

Fig. 4 is the utility model model combination structural section schematic diagram;

Fig. 5 is existing a kind of structural representation of base plate core;

Fig. 6 is the another kind of structural representation of existing base plate core.

Among the figure, the 1st, detent, the 2nd, base plate wicking surface, the 3rd, main core location basal plane, the 4th, the main core face of strike-ofing, the 5th, end face core, the 6th, outside core, the 7th, base plate core, the 8th, main core, the 9th, positioning boss.

The specific embodiment

Below by embodiment the utility model is conducted further description; present embodiment only is used for the utility model is further detailed; but can not be interpreted as the restriction to the utility model protection domain, those skilled in the art makes some nonessential improvement according to content of the present utility model and adjustment belongs to the scope that the utility model is protected.

In conjunction with Fig. 1 to Fig. 4.

As shown in the figure, the crankcase built-up pattern comprises base plate core 7, is positioned at the main core 8 at base plate core 7 middle parts, the outside core 6 of both sides and the end face core 5 at two ends, and base plate core 7 has detent 1.

Main core 8 has the face of strike-ofing 4 of location basal plane 3 and bottom, and the face 4 of strike-ofing is arranged in detent 1, and main core location basal plane 3 is fixing with base plate wicking surface 2 location.The outside core 6 of both sides and the end face core at two ends 5 are fixing with base plate core 7 location by base plate wicking surface 2.

As shown in Figure 1, during mould assembly, the main core of foundry goods master core 8 location basal plane 3 and base plate wicking surface 2 corresponding matching are placed on the main core face 4 of strike-ofing in the groove 1.Then end face core 5 bottom surfaces are placed on the base plate wicking surface 2; Outside core 6 bottom surfaces are placed on the backplate surface 2.The height of main core 8, end face core 5 and outside core 6 has guaranteed the height dimension of each core all take base plate wicking surface 2 as benchmark.Among Fig. 1 in order to represent model structure behind the mould assembly, only with an end face core 5 and outside core 6 expressions in the drawings.

Fig. 2 is the utility model base plate cored structure schematic diagram, as shown in the figure, be provided with detent 1 at middle part, base plate core 7 surface, detent 1 degree of depth and main core location basal plane 3 couplings determine height and the relative positioning position of whole mould assembly model, be arranged in detent 1 during the face of strike-ofing 4 mould assembly of main core 8, strike-off face 4 when main core 8 moulding usually size can not accurately determine, processing is strike-off face 4 thickness less than detent 1 degree of depth by strike-ofing, so by base plate wicking surface 2 cooperates with main core location basal plane 3 locate after, the face 4 of strike-ofing does not affect behind the mould assembly each central layer of mould and locates.

Fig. 3 is the structural representation of this routine main core 8, as shown in the figure, determines that at the face of strike-ofing 4 two ends basis and base plate core 7 Position Design needs two symmetrical platforms are main core location basal plane 3.

Fig. 4 is model mould assembly structural section schematic diagram, as shown in the figure, and behind the mould assembly, the face of strike-ofing 4 of main core 8 is arranged in detent 1, the height of face 4 can not accurately be determined although strike-off, and it is less than detent 1 degree of depth, does not affect the positioning height of other assemblies behind the whole mould assembly.

Fig. 5 and Fig. 6 are existing base plate core schematic diagrames, as shown in Figure 5, base plate core 7 surfaces are a plane, it is fixing that location, base plate core 7 surface is directly placed in the bottom surface of master's core 8 during mould assembly, usually undesirable because of the main core 8 bottom surfaces unstable model that causes of face 4 sizes of strike-ofing, so when existing mould assembly model, adopt and relatively locate than high piece and main core 8, its complicated operation, and can not guarantee that castability is stable, reliable.As shown in Figure 6, be provided with positioning boss 9 on base plate core 7 surfaces, positioning boss 9 has more mating surface, although can be to main core 8, end face core 5 and outside core 6 location, but its each mating surface produces overlap when casting more, and because foundry goods die cavity bottom surface is combined into by outside core 6, main core 8, base plate core positioning boss 9, molten iron enters easily and produces the gap during casting.

Claims

1. crankcase built-up pattern comprises base plate core (7), is positioned at main core (8), the outside core (6) of both sides and the end face core (5) at two ends at base plate core (7) middle part, and it is characterized in that: described base plate core (7) has detent (1).

2. crankcase built-up pattern according to claim 1, it is characterized in that: described main core (8) has the face of strike-ofing (4) of location basal plane (3) and bottom, the face (4) of strike-ofing is arranged in detent (1), and main core location basal plane (3) is fixing with base plate wicking surface (2) location.

3. crankcase built-up pattern according to claim 2 is characterized in that: the end face core (5) at the outside core of described both sides (6) and two ends is fixing with base plate core (7) location by base plate wicking surface (2).