CN101380660A

CN101380660A - Arc sleeve type casting die

Info

Publication number: CN101380660A
Application number: CNA2008100689447A
Authority: CN
Inventors: 聂胜华; 冉兴; 邵英伟; 王越飞
Original assignee: Guizhou Anji Aviation Precision Casting Co Ltd
Current assignee: Guizhou Anji Aviation Precision Casting Co Ltd
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2009-03-11
Anticipated expiration: 2028-10-17
Also published as: CN101380660B

Abstract

The invention discloses a casting die like an arc sleeve which belongs to a die. The invention aims at providing a casting die which can smoothly take a die and has the uniform wall thickness of the casting. The die includes an outer mold and a mold core arranged in the die cavity of the outer mold; the outer mold consists of an upper movable module and a lower movable module which are butted, a left movable module fixed at the left end surface of the two modules and a right movable module fixed at the right end surface of the two modules; the mold core is formed by butting an upper semi-mold core and a lower semi-mold core (3, 4); the combining surface of the two semi-mold cores is an arc surface; the arc surface leads the upper semi-mold core (3) to be in an arc wedge structure the left section thickness of which is more than that of the right section; the left sections of the upper semi-mold core and the lower semi-mold core (3, 4) are fixed in the left movable module (2); the upper movable module and the lower movable module (5, 7) are respectively provided with a locating lug boss (6); the heights of the lug bosses are equal to the wall thickness of the casting. The die has simple structure and high machining precision, is convenient to take the die and is mainly applied for processing the casting like the arc sleeve with an opening at one end.

Description

Arc sleeve type casting die

Technical field: the present invention relates to a kind of mould, relate in particular to a kind of mould that is used to cast the camber sleeve part.

Background technology: the slide rail sleeve is a strength member on the aircraft, it is that length direction is that arc, cross sectional shape are square thin walled cylinder body class part, its inner chamber is very dark, little and the required precision strictness of wall thickness dimension, therefore in actual production, must at first utilize Mould Machining to go out wax-pattern, and then utilize this lost wax casting slide rail sleeve.But, when designing mould, do not allow small pattern draft between the contact-making surface of core and wax-pattern because the size in each cross section of slide rail sleeve is a fixed value; The wall thickness of slide rail sleeve 0.01mm only in addition, therefore very difficulty, percent defective are high when utilizing the Mould Machining wax-pattern.

At present, the mould that is used for processing slide rail sleeve wax-pattern usually by external mold, be arranged on the external mold die cavity core, be arranged on the core end face and be used for the straight pin of external model resonator end surface location, be arranged on the exhaust apparatus that the core end face is used for withdrawing pattern and constitute; Mainly there is following shortcoming in traditional moulds:

1) though be provided with the exhaust apparatus that withdrawing pattern is used at the end face of core, be monolithic construction because core adopts, wax-pattern is very big to the core package power, and air can't enter four sides of core; The thickness of wax-pattern wall as thin as a wafer and do not have a pattern draft in addition; Therefore the core withdrawing pattern is relatively more difficult, often causes wax-pattern to break easily.

2) though be arranged on straight pin and the external model resonator end surface location that the core that is cantilever position in the external mold die cavity can be by being located at its end face, but because machining accuracy is difficult to guarantee, be offset easily when causing core to be located by straight pin, thereby cause the wax-pattern wall unevenness even, finally cause the wall thickness of slide rail sleeve to guarantee.

3) wax-pattern that adopts traditional moulds to process, its die cavity wall thickness are difficult for measuring.

4) because unitary core has adopted the mode of straight pin end face location, on wax-pattern, can form a fabrication hole, therefore also must take subsequent handling to handle, increase processing cost.

Summary of the invention: at the above-mentioned defective that exists in the prior art, the present invention aim to provide a kind of can smooth and easy delivery, can guarantee the uniform arc sleeve type casting die of casting section thickness.

To achieve these goals, the present invention is by the following technical solutions: it comprises external mold, is arranged on the core in the external mold die cavity, and described external mold is made of involutory movable upper module that links together and movable lower module, the movable left module that is fixed on movable upper module and movable lower module left side, the movable right module that is fixed on movable upper module and movable lower module right side; Described core is involuted by first core and second core, the faying face of this two halves core is a cambered surface, this cambered surface makes first core be the arc chock shape structure of left side section thickness greater than right section thickness on bending direction, and the left side section of first core and second core is fixed in the movable left module; Be respectively equipped with positioning boss on movable upper module and the movable lower module, the height of this boss equals the wall thickness of foundry goods.

The left side section of first core and second core is by the latch location that is arranged on the movable left module; The contact-making surface of positioning boss and core is cambered surface or the plane that matches with this whose surfaces.

Compared with the prior art, the present invention is owing to changed original integrally-built core into the fabricated structure that is made of first core and second core on the basis of traditional moulds, and make first core of curved chock shape structure and the faying face shape complementarity of second core, therefore between the faying face of first core and second core, form a pattern draft, thereby can reach the purpose of smooth delivery; In addition, owing to substitute the straight pin that was arranged on whole core end face originally as setting element with the positioning boss that is arranged on the external mold, therefore not only improve positioning accuracy effectively, thoroughly overcome the uneven defective of casting section thickness, and just can obtain the size of casting section thickness indirectly by the height of measurement and positioning boss, the casting section thickness that has solved traditional moulds processing is difficult for the problem measured.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is the structural representation of traditional moulds.

Among the figure: latch 1 movable left module 2 first core 3 second core 4 movable upper module 5 positioning boss 6 movable lower module 7 movable right modules 8

The specific embodiment: the invention will be further described below in conjunction with accompanying drawing and specific embodiment:

In Fig. 1～2, external mold is made of involutory movable upper module 5 that links together and movable lower module 7, the movable left module 2 that is fixed on movable upper module 5 and movable lower module 7 left sides, the movable right module 8 that is fixed on movable upper module 5 and movable lower module 7 right sides; The top of movable upper module 5 inwalls and the both sides of inwall and the bottom of movable lower module 7 inwalls respectively are provided with a positioning boss 6 to described external mold die cavity projection, and the height of each positioning boss 6 just in time equals the wall thickness (being the wall thickness of wax-pattern) of foundry goods.The core that is involuted by first core 3 and second core 4 is arranged in the die cavity of external mold, and the four sides of described core is supported by positioning boss 6; Wherein, the positioning boss 6 that is positioned at movable upper module 5 inwall both sides just in time be in first core 3 and second core 4 faying face the position and this two halves core is withstood simultaneously.The faying face of first core 3 and second core 4 is a cambered surface, this cambered surface makes first core 3 be the arc chock shape structure of section thickness in a left side greater than right section thickness on the bending direction, make second core 4 be the arc chock shape structure of left side section thickness less than right section thickness on bending direction, and the arc faying face of first core 3 and second core 4 is complementary fits; The described left side section of first core 3 and second core 4 is fixed in the movable left module 2.For fear of overlap, burr occurring corresponding to the position of positioning boss 6 at wax-pattern, simultaneously also for the ease of delivery, the surface that is arranged on the positioning boss 6 at movable upper module 5 inwall tops is and the identical cambered surface of first core 3 end face radians, the surface that is arranged on the positioning boss 6 of movable lower module 7 inwalls bottom is and the identical cambered surface of second core 4 bottom surface radians, the plane that to be first core 3 contact simultaneously with second core 4, the surface that is arranged on the positioning boss 6 of movable upper module 5 inwall both sides.In order to guarantee that first core 3 and second core 4 can be involutory accurately, the left side section of first core 3 and second core 4 is by latch 1 location that is arranged on the movable left module 2.Obviously, as required, core also can by three or more polylith combine.

During delivery, at first latch 1 is extracted out, extracted first core 3 then, extract second core 4 again, the more left module 2 of activity, movable upper module 5, movable lower module 7, movable right module 8 are taken apart respectively just and can be taken out the wax-pattern that shape is complete, dimensional accuracy is high at last.

Fig. 1 and Fig. 3 are compared as can be seen and since traditional moulds monoblock type core rod around closely wrapped up by wax-pattern and do not had pattern draft, so delivery is very difficult; And the type heart of the present invention has formed the pattern draft of arc owing to adopted the fabricated structure that is made of first core 3 and second core 4 between the contact-making surface of first core 3 and second core 4, so delivery is very smooth and easy.

Claims

1. arc sleeve type casting die, comprise external mold, be arranged on the core in the external mold die cavity, described external mold is made of involutory movable upper module that links together and movable lower module, the movable left module that is fixed on movable upper module and movable lower module left side, the movable right module that is fixed on movable upper module and movable lower module right side; It is characterized in that: described core is involuted by first core (3) and second core (4), the faying face of this two halves core is a cambered surface, this cambered surface makes first core (3) be the arc chock shape structure of left side section thickness greater than right section thickness on bending direction, and the left side section of first core (3) and second core (4) is fixed in the movable left module (2); Be respectively equipped with positioning boss (6) on movable upper module (5) and the movable lower module (7), the height of this boss equals the wall thickness of foundry goods.

2. arc sleeve type casting die according to claim 1 is characterized in that: the left side section of first core (3) and second core (4) is by latch (1) location that is arranged on the movable left module (2).

3. arc sleeve type casting die according to claim 1 and 2 is characterized in that: positioning boss (6) is cambered surface or the plane that matches with this whose surfaces with the contact-making surface of core.