CN201223930Y

CN201223930Y - Near net forming mould for direct extrusion casting of complex parts

Info

Publication number: CN201223930Y
Application number: CNU200820120668XU
Authority: CN
Inventors: 高明灯; 朱秀荣; 费良军; 彭银江
Original assignee: No 52 Institute of China North Industries Group Corp
Current assignee: No 52 Institute of China North Industries Group Corp
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-04-22
Anticipated expiration: 2018-06-30

Abstract

The utility model discloses a complex part direct squeeze casting near-net forming mold and relates to a design idea of direct squeeze casting of the non-processing parts with complex and irregular shape and less requirements. The mold mainly comprises an upper pressure plate, an upper backing plate, a pressure head, a lower mold, a mandrel, a lower mold soleplate, a reset rod, a lower vertical plate, a lower backing plate and a lower pressure plate, and is characterized in that an overflow channel and an overflow chamber are arranged on the mold and at the locations corresponding to the highest position of the part. With the overflow technical proposal, the mold enables the excess liquid metal to flow into the overflow chamber by determining the distance from the overflow channel to the highest point of the part to achieve quantitative pouring and forming of the liquid metal of the part, so as to realize the near-net shaping of the part. The proposal can broaden the control of the operator on liquid metal pouring amount and has the advantages of reducing man-made influencing factors, saving equipment investment, improving productivity, reducing labor work and lowering manufacturing costs and the like; therefore, the proposal is particularly suitable for small batch production and trial production.

Description

The direct extrusion casint near-net-shape of a kind of complex parts mould

Technical field

The utility model relates to a kind of direct extrusion casint near-net-shape mould that requires few no processing parts, relates in particular to the direct extrusion casint near-net-shape of not contour, the in irregular shape complex parts in a kind of each position mould.

Background technology

Extrusion casint is that the liquid metal that pours in the casting mold die cavity is applied bigger mechanical pressure, and makes its shaping and solidify, thereby obtains a kind of process of foundry goods.It has direct extrusion casint and indirect extrusion casting dual mode.The indirect extrusion casting mode is not subjected to the influence of casting of metals amount, the casting dimension accuracy height; But because of pressure head directly or does not only partly stress on the foundry goods, the pressurization effect is relatively poor, therefore mainly is applicable on the not too high foundry goods such as Birmasil of performance requirement.Directly extrusion casint does not have runner system, and pressure head directly stresses on the upper surface and the inner surface of foundry goods, and it is effective to pressurize, so it is applicable on the higher foundry goods such as wrought aluminium alloy of performance requirement.Yet, because direct Squeeze Casting, it is riser-free but also do not have " material cake " not only, the liquid metal of cast all forms the foundry goods body, its foundry goods height is fully by watering how much deciding of fluence, therefore concerning part complex-shaped, irregular, the few nothing processing of requirement again, must strictly control and water fluence to realize near-net-shape production.

Now, for large batch of suitability for industrialized production, mainly adopt modes such as hand type automatic ration apparatus for pouring and electromagnetic pump formula automatic ration apparatus for pouring when fluence is watered in control, problems such as equipment investment is big, versatility difference that it mainly exists not too are suitable for small lot and trial-production is produced.For small lot batch manufacture, water fluence and mainly control by measure such as mark on meter ladle or the mould by operating personnel, exist artifical influence factor big, phenomenons such as control instability.

Summary of the invention

Technical problem to be solved in the utility model just is to provide a kind of and is applicable to that each position is not contour, out-of-shape, require few direct extrusion casint near-net-shape mould that does not have the complex parts of processing again, saves the needs that large equipment drops into to satisfy small lot and trial-production in producing.

Technical problem of the present utility model solves by following technical proposal: the direct extrusion casint near-net-shape of a kind of complex parts mould, it pressure head that comprises patrix is fixed by upper padding plate and top board, counterdie is by baffle plate and following riser and lower platen are fixed down, push rod passes down baffle plate with release link and the lower bolster and the lower roof plate of closed assembly are fixed mutually, described lower roof plate is located on the lower platen and by the push rod jacking, it is characterized in that described mould with the corresponding position of part highest order on be provided with overflow ducts and spill cavity.

Between described overflow ducts and part peak apart from a=2～5mm, the height b=10～15mm of overflow ducts, width c=30～40mm.

Technique effect of the present utility model: owing to adopted the overflow scheme, by determine between overflow ducts and the part peak apart from a, can make unnecessary molten metal flow into spill cavity, realize part molten metal quantitatively cast and shaping, thereby reach the near-net-shape purpose of part.Simultaneously because of can discharging by unnecessary molten metal, thereby can relax the control of operating personnel to the pouring metal melt amount, the minimizing artifical influence factor has saving equipment input, enhances productivity, alleviates effects such as manual labor and reduction manufacturing cost.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram.

Fig. 2 is the utility model implementation process schematic diagram.

Wherein: (a)-after pressure head enters molten metal, molten metal liquid level rising schematic diagram.

(b)-along with pressure head moves down, molten metal flows into spill cavity until sealing overflow ducts.

(c)-pressure head continues to move down, and finishes the Solid State Contraction of molten metal and the plastic deformation of extrusion casint.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing is described further concrete structure of the present utility model again.

Shown in Fig. 1～2, among the figure: 1-top board, 2-upper padding plate, 3-pressure head, 4-counterdie, 5-push rod, 6-following baffle plate, 7-release link, 8-following riser, 9-push rod, 10-lower bolster, 11-lower roof plate, 12-lower platen, 13-push rod, 14-molten metal, 15-complex parts, A-overflow ducts, B-spill cavity.

As shown in Figure 1, the direct extrusion casint near-net-shape of the complex parts of the utility model mould, its patrix pressure head 3 is fixing with top board 1 by upper padding plate 2, counterdie 4 is by baffle plate 6 and following riser 8 are fixing with lower platen 12 down, push rod 5,9 passes down baffle plate with release link 7 and the lower bolster 10 and the lower roof plate 11 of closed assembly are fixed mutually, and lower roof plate 11 is located on the lower platen 12, and by the push rod jacking.This mould with the corresponding position of part highest order on offer overflow ducts A and spill cavity B.By between control overflow ducts A and part peak apart from a, can make unnecessary molten metal flow into spill cavity B, the near-net-shape of realization part.Need consider the intensity at this position when design overflow ducts A, its height b is 10～15mm, width c=30～40mm, length and part highest order consistent size.Between overflow ducts A and part peak apart from a, mainly decide by the technological parameter of extrusion casint and the physical property of molten metal, its value is generally 2～5mm.

The course of work of complex parts near-net-shape is as shown in Figure 2: start hydraulic press, operating personnel pour into an amount of molten metal to mould, and the hydraulic press crossbeam drives pressure head 3, upper padding plate 2 and top board 1 and moves down, after pressure head 3 enters molten metal 14, molten metal 14 liquid levels rise, shown in Fig. 2 (a).Along with moving down of pressure head 3, molten metal 14 liquid levels rise to overflow ducts A, and the molten metal 14 that exceeds overflow ducts A subsequently flows into spill cavity B, moves down into overflow ducts A until pressure head 3, closes overflow ducts A, shown in Fig. 2 (b).Pressure head 3 continues to move down and stress on the molten metal 14 that is enclosed in pressure head 3 and the counterdie 4 subsequently, until the mushy stage contraction of finishing molten metal 14 and the plastic deformation of extrusion casint, produces the complex parts 15 of near-net-shape, shown in Fig. 2 (c).

During the part depanning, drive on pressure head 3, upper padding plate 2 and the top board 1 by the hydraulic press crossbeam earlier and move, making up and down, mould separates, rise with liftout tank by the push rod 13 that is connected the hydraulic press liftout tank then, promote push rod 5,9, release link 7 and part 15 simultaneously by lower roof plate 11, lower bolster 10, when part exceeds on the counterdie 4 plane, can take out part.

Claims

1, the direct extrusion casint near-net-shape of a kind of complex parts mould, it pressure head (3) that comprises patrix is fixing by upper padding plate (2) and top board (1), counterdie (4) is by baffle plate (6) and following riser (8) are fixing with lower platen (12) down, push rod (5), (9) pass down baffle plate (6) with release link (7) and lower bolster of closed assembly (10) and lower roof plate (11) are fixing mutually, described lower roof plate is located on the lower platen and by push rod (13) jacking, it is characterized in that described mould with the corresponding position of part highest order on be provided with overflow ducts (A) and spill cavity (B).

2, the direct extrusion casint near-net-shape of a kind of complex parts according to claim 1 mould, it is characterized in that between described overflow ducts (A) and part peak apart from a=2～5mm, height b=10～the 15mm of overflow ducts, width c=30～40mm.