CN202123212U

CN202123212U - Improved structure of large-caliber and low-pound-grade valve cover cast

Info

Publication number: CN202123212U
Application number: CN2011202463476U
Authority: CN
Inventors: 于忠良
Original assignee: Sufa Hengdian Machinery Co Ltd CNNC
Current assignee: Sufa Hengdian Machinery Co Ltd CNNC
Priority date: 2011-07-13
Filing date: 2011-07-13
Publication date: 2012-01-25
Anticipated expiration: 2021-07-13

Abstract

The utility model discloses an improved structure of a large-caliber and low-pound-grade valve cover cast, which comprises a cast body and a die cavity, wherein the die cavity is arranged in the cast body; the bottom of the cast body is connected with a feeder head; the side wall of the die cavity, close to the feeder head, is provided with a wedge-shaped compensating block which is gradually close to the center of the die cavity from top to bottom, so as to add a compensation amount at a certain range of position on the upper box part of the cast; a span size formed after the side wall of the die cavity at the part deforms after being suffered from the pulling force of the feeder head meets the requirements on the size of the cast; therefore, the repair cost is decreased; and the quality of the cast is promoted.

Description

The low pound level of heavy caliber valve gap foundry goods improves structure

Technical field

The utility model relates to a kind of foundry goods, is that the low pound level of a kind of heavy caliber that is used to cast valve gap is used foundry goods specifically.

Background technology

Foundry goods is the metal forming object that obtains with various casting methods; Promptly smelting good liquid metal; Inject preprepared casting mold with cast, injection, suction or other casting method; Cooling is after knockout, cleaning and post processing etc., and resulting have definite shape, an object of size and performance.The factor that influences casting quality is a lot; During designing cast; Except confirming foundry goods geometry, the size according to condition of work and metal material performance; Also must consider designed rationality from the angle of casting alloy and casting technique characteristic, promptly significantly dimensional effect, solidify, problems such as contraction, stress, with generation of defects such as the component segregation of avoiding or reduce foundry goods, distortion, crackings.Like Fig. 1, the low pound level of the heavy caliber shown in 2 valve gap foundry goods, in original founding method, rising head partly draws distortion with the top box of foundry goods, causes grade size of opening of foundry goods to become big, and casting dimension is undesirable; If will reach the dimensional requirement of foundry goods once more, the casting later stage need increase a large amount of patch work, fills up the disappearance part 03 among Fig. 2, has increased workman's the amount of labour, has reduced operating efficiency.

Summary of the invention

The utility model problem to be solved just provides the low pound level of heavy caliber valve gap foundry goods, and through increasing the revisal amount, foundry goods still can guarantee dimensional requirement after using, and reduces and reprocesses cost.

For solving the problems of the technologies described above; The utility model adopts following technical scheme: the low pound level of heavy caliber valve gap foundry goods improves structure; Comprise the foundry goods body and be located at the intrinsic die cavity of foundry goods; Foundry goods body bottom connects rising head, and it is characterized in that: the cavity lateral near rising head is provided with the wedge shape revisal piece of drawing close to the die cavity center gradually from top to bottom.

Further, the angle of wedge angle of said wedge shape revisal piece is 0.5 °～1.5 °.

Further, the angle of wedge angle of said wedge shape revisal piece is 1 °.

Further, said wedge shape revisal piece and foundry goods body are formed in one.

The beneficial effect of the utility model: wedge shape revisal piece is set on the cavity lateral near rising head; Promptly increase the revisal amount in the top box part certain limit position of foundry goods; The cavity lateral of this part outwards is out of shape that the back is formed opens a grade size conforms casting dimension requirement receiving the rising head pulling force; So just reduce the cost of reprocessing, promoted casting quality.

Description of drawings

Fig. 1 is the structural representation of the low pound level of existing heavy caliber valve gap foundry goods;

Fig. 2 hangs down the structural representation after pound level valve gap foundry goods uses for existing heavy caliber;

Fig. 3 is the structural representation of the utility model;

Fig. 4 is the structural representation of the utility model after using.

The specific embodiment

With reference to Fig. 3; The low pound level of heavy caliber valve gap foundry goods improves structure; Comprise foundry goods body 1 and be located at the die cavity 2 in the foundry goods body 1, foundry goods body 1 bottom connects rising head 3, is provided with the wedge shape revisal piece of drawing close to die cavity 2 centers gradually 4 from top to bottom near die cavity 2 sidewalls of rising head 3.The angle of wedge angle of wedge shape revisal piece 4 is 0.5 °～1.5 °; 1 ° of angle of wedge of preferential employing; Wedge shape revisal piece 4 is formed in one with foundry goods body 1; Just reserving corresponding revisal amount when promptly processing foundry goods, can certainly be when the foundry goods post-production, through methods such as welding, bondings wedge shape revisal piece 4 to be connected on the foundry goods body 1.With reference to Fig. 4, the cavity lateral that is provided with wedge shape revisal piece 4 outwards is out of shape that the back is formed opens a grade size conforms casting dimension requirement receiving rising head 3 pulling force, has so just reduced the cost of reprocessing, and has promoted casting quality.

Claims

1. the low pound level of heavy caliber valve gap foundry goods improves structure; Comprise foundry goods body (1) and be located at the die cavity (2) in the foundry goods body (1); Foundry goods body (1) bottom connects rising head (3), and it is characterized in that: die cavity (2) sidewall near rising head (3) is provided with the wedge shape revisal piece of drawing close to die cavity (2) center gradually (4) from top to bottom.

2. the low pound level of heavy caliber according to claim 1 valve gap foundry goods improves structure, and it is characterized in that: the angle of wedge angle of said wedge shape revisal piece (4) is 0.5 °～1.5 °.

3. the low pound level of heavy caliber according to claim 2 valve gap foundry goods improves structure, and it is characterized in that: the angle of wedge angle of said wedge shape revisal piece (4) is 1 °.

4. improve structure according to claim 1 or the low pound level of 2 or 3 described heavy calibers valve gap foundry goods, it is characterized in that: said wedge shape revisal piece (4) is formed in one with foundry goods body (1).