CN103909222A

CN103909222A - Method of reducing casting defects of automobile brake caliper stand

Info

Publication number: CN103909222A
Application number: CN201410096826.2A
Authority: CN
Inventors: 王新乐; 王永涝; 任现伟; 张雷庭; 倪忠恒
Original assignee: CHINA LUOYANG GUCHENG MACHINERY Co Ltd
Current assignee: CHINA LUOYANG GUCHENG MACHINERY Co Ltd
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2014-07-09
Anticipated expiration: 2034-03-17
Also published as: CN103909222B

Abstract

The invention relates to the field of automobile component casting, and particularly relates to a method of reducing casting defects of an automobile brake caliper stand. According to the method, the cross section ratio of three flow control ingates is 3:2:1, molten iron firstly forms a cope pressure-reducing pond when flowing into a cope riser through an upper flow control ingate, during which, two thirds of the molten iron will flows into a middle riser through a middle flow control ingate and the rest one third of the molten iron fills a cope casting mold cavity; when the molten iron flowed into the middle riser forms a middle pressure-reducing pond, a half of the molten iron flowed into will flow into a drag riser through a lower flow control ingate and the rest of the molten iron fills a middle casting mold cavity; and finally, the molten iron flowed into the drag riser forms a drag pressure-reducing pond and fills a drag casting mold cavity. The method can effectively overcome generation of slag inclusion, sand holes, cold shut, and other defects of castings.

Description

A kind of method that reduces automotive bake caliper support casting flaw

[technical field]

The present invention relates to auto parts and components casting technology field, especially relate to a kind of for reduce the method for mo(u)ld bottom half casting defect in the process of casting of automobile brake-caliper support.

[background technology]

Known, brake-caliper support is one of critical piece of brake system of car, and it is that fixing braking clamp body connects knuckle, and the bridge that both are consistent, it is in the time that braking clamp body is braked, the torque of whole wheels being transmitted to knuckle, thereby realizes the object of skidding, at present, because brake-caliper support adopts the casting of DISA230 vertical line tide film sand more, and the template of its production line is of a size of: long 650mm, wide 530mm, bracket casting is of a size of: long 150mm, wide 78mm, high 67mm, therefore, existing brake-caliper support all adopts upper and lower cavity ingate to unite than the technological design of method, and described ingate system is that multiple die cavities are upper and lower arranged distribution than method, and the ratio of flow control ingate is unanimous between the higher and lower levels, captured area is big or small identical, but, in long-term practical application, find, because this process system designing than method with ingate system is to adopt first mo(u)ld bottom half to be full of in the time that iron liquid fills type, then just gradually upwards to being full of mo(u)ld top half, but, the mo(u)ld bottom half that die cavity hydrostatic head is large can cause iron liquid flowing velocity very fast, therefore, in the time filling, can cause iron liquid to scatter splashes and washes away type wall, thereby very easily cause foundry goods slag inclusion, sand hole, also easily volume gas makes iron liquid generation oxidation form cold shut simultaneously, elephant skin, the casting flaw such as scab, this has not only reduced quality and the yield rate of product, and increase accordingly the cost of producer.

[summary of the invention]

In order to overcome the deficiency in background technology, the invention discloses a kind of method that reduces automotive bake caliper support casting flaw, described method not only can reach Quick pouring, and low speed fills the object of type, but also can effectively solve the generation of the defects such as foundry goods slag inclusion, sand hole, cold shut.

For achieving the above object, the present invention adopts following technical scheme:

A kind of method that reduces automotive bake caliper support casting flaw, described method adopts the top-down sectional area ratio by three flow control ingates to be made as 3:2:1, thereby while making iron liquid pass through flow control ingate inflow mo(u)ld top half rising head during filling type, can first in mo(u)ld top half rising head, assemble and form mo(u)ld top half pressure release pond; During mo(u)ld top half pressure release pond forms, 2/3 of iron liquid can flow into medium-sized rising head by flow control ingate in mo(u)ld top half rising head warp, and the iron liquid of residue 1/3 fills type mo(u)ld top half foundry goods die cavity; During the iron liquid of the medium-sized rising head of inflow is assembled and formed medium-sized pressure release pond in medium-sized rising head, 1/2 meeting that flows into the iron liquid of medium-sized rising head flows into mo(u)ld bottom half rising head through lower flow control ingate, and remaining 1/2 iron liquid fills type medium casting die cavity; Finally, the iron liquid that flows into mo(u)ld bottom half rising head is assembled formation mo(u)ld bottom half pressure release pond and is filled type mo(u)ld bottom half foundry goods die cavity to iron liquid in mo(u)ld bottom half rising head.

The method of described minimizing automotive bake caliper support casting flaw, the upper end of described middle flow control ingate is connected with mo(u)ld top half rising head, and the upper end of middle flow control ingate has R excessive while being connected with mo(u)ld top half rising head; The upper end of described lower flow control ingate is connected with medium-sized rising head, and the upper end of lower flow control ingate has R excessive while being connected with medium-sized rising head.

The method of described minimizing automotive bake caliper support casting flaw, described middle flow control ingate does not all overlap with the axis of upper flow control ingate and lower flow control ingate.

Owing to adopting technical scheme as above, the present invention has following beneficial effect:

The method of minimizing automotive bake caliper support casting flaw of the present invention is to utilize the interaction of power and power, make the iron liquid of assembling in rising head eliminate the pressure head power that gravity produces, utilize the interaction of power to make iron liquid in upper level rising head, assemble formation pressure release pond, and then spread iron liquid downwards by upper level rising head, thereby form the separation Reduce pressure head pouring technology system that staged transmits; Described method not only can be decomposed high-head to eliminate, and makes iron liquid low pressure fill type to whole foundry goods die cavities stably, but also the generation that can effectively solve the defects such as foundry goods slag inclusion, sand hole and cold shut in the situation that not changing the duration of pouring; Described method has not only solved the defect of slag inclusion, sand hole and the cold shut of foundry goods, but also has widened the adaptability of process system, and has improved quality and the yield rate of foundry goods, has reduced accordingly control difficulty and the production cost in cavity filling process.

[brief description of the drawings]

Fig. 1 is process structure schematic diagram of the present invention.

In figure: 1, upper flow control ingate; 2, mo(u)ld top half rising head; 3, middle flow control ingate; 4, medium-sized rising head; 5, lower flow control ingate; 6, mo(u)ld bottom half rising head.

[detailed description of the invention]

Can explain in more detail the present invention by the following examples, disclose object of the present invention and be intended to protect all changes and improvements in the scope of the invention, the present invention is not limited to the following examples:

A kind of method that reduces automotive bake caliper support casting flaw described in 1 by reference to the accompanying drawings, described method adopts the top-down sectional area ratio by three flow control ingates to be made as 3:2:1, words that the sectional area of going up flow control ingate 1 is 3, the sectional area of middle flow control ingate 3 is 2, the sectional area of lower flow control ingate 5 is 1, such setting can be during iron liquid fills type, make iron liquid through on flow control ingate 1 flow into after mo(u)ld top half rising head 2, can be because the sectional area of middle flow control ingate 3 diminishes form mo(u)ld top half pressure release pond in the interior gathering of mo(u)ld top half rising head 2; During mo(u)ld top half pressure release pond forms, 2/3 of iron liquid can flow into medium-sized rising head 4 by flow control ingate 3 in mo(u)ld top half rising head 2 warps, and the iron liquid of residue 1/3 starts to fill type mo(u)ld top half foundry goods die cavity; Equally, when the iron liquid of the medium-sized rising head 4 of inflow is assembled the medium-sized pressure release pond of formation in medium-sized rising head 4 because the sectional area of lower flow control ingate 5 diminishes during, 1/2 meeting that flows into the iron liquid of medium-sized rising head 4 flow into mo(u)ld bottom half rising head 6 through lower flow control ingate 5, remaining 1/2 iron liquid fills type medium casting die cavity, be that 1/3 of iron liquid total amount flows into mo(u)ld bottom half rising head 6 through lower flow control ingate 5,1/3 of residue iron liquid total amount starts to fill type medium casting die cavity; Finally, the iron liquid that flows into mo(u)ld bottom half rising head 6 forms mo(u)ld bottom half pressure release pond and fills type mo(u)ld bottom half foundry goods die cavity to iron liquid in the interior gathering of mo(u)ld bottom half rising head 6, when upper, middle and lower three type foundry goods die cavities all fill the complete i.e. described method EO of type;

In addition, the upper end of described middle flow control ingate 3 is connected with mo(u)ld top half rising head 2, and the upper end of middle flow control ingate 3 has R excessive while being connected with mo(u)ld top half rising head 2; The upper end of described lower flow control ingate 5 is connected with medium-sized rising head 4, and the upper end of lower flow control ingate 5 has R excessive while being connected with medium-sized rising head 4; Simultaneously, the axis of middle flow control ingate 3 can also be made as to the state all not overlapping with the axis of upper flow control ingate 1 and lower flow control ingate 5, thereby make iron liquid can reach the object of assembling at corresponding rising head Nei Gengyi because mobile axis does not overlap in the time flowing downward; Described method adopts stepped iron liquid to transmit high-head decomposition is eliminated, thereby having formed iron liquid low-head steadily pours into a mould, this has not only met Quick pouring, low speed fills the requirement of type, and slag inclusion, the sand hole of foundry goods, the generation of cold shut defects are solved, the yield rate that has improved accordingly foundry goods, has reduced production cost.

Part not in the detailed description of the invention is prior art, therefore the present invention is not described in detail.

Claims

1. one kind is reduced the method for automotive bake caliper support casting flaw, it is characterized in that: described method adopts the top-down sectional area ratio by three flow control ingates to be made as 3:2:1, thereby while making iron liquid pass through flow control ingate (1) inflow mo(u)ld top half rising head (2) during filling type, can first in mo(u)ld top half rising head (2), assemble and form mo(u)ld top half pressure release pond; During mo(u)ld top half pressure release pond forms, 2/3 of iron liquid can flow into medium-sized rising head (4) by flow control ingate in mo(u)ld top half rising head (2) warp, and the iron liquid of residue 1/3 fills type mo(u)ld top half foundry goods die cavity; During the iron liquid of the medium-sized rising head of inflow (4) is assembled and is formed medium-sized pressure release pond in medium-sized rising head (4), 1/2 meeting that flows into the iron liquid of medium-sized rising head (4) flows into mo(u)ld bottom half rising head (6) through lower flow control ingate (5), and remaining 1/2 iron liquid fills type medium casting die cavity; Finally, the iron liquid that flows into mo(u)ld bottom half rising head (6) is assembled formation mo(u)ld bottom half pressure release pond and fills type mo(u)ld bottom half foundry goods die cavity to iron liquid mo(u)ld bottom half rising head (6) in.

2. the method for minimizing automotive bake caliper support casting flaw according to claim 1, it is characterized in that: the upper port of described middle flow control ingate (3) is connected with mo(u)ld top half rising head (2), and the upper end of middle flow control ingate (3) has R excessive while being connected with mo(u)ld top half rising head (2); The upper port of described lower flow control ingate (5) is connected with medium-sized rising head (4), and the upper end of lower flow control ingate (5) has R excessive while being connected with medium-sized rising head (4).

3. the method for minimizing automotive bake caliper support casting flaw according to claim 1 and 2, is characterized in that: described middle flow control ingate (3) does not all overlap with the axis of upper flow control ingate (1) and lower flow control ingate (5).