CN102389948B - Mold capable of preventing rectangular casting from deforming - Google Patents

Abstract

The invention provides a mold capable of preventing a rectangular casting from deforming. The mold comprises a wood mold arranged in a rectangular cavity; and a tie piece slot which is communicated with the inner side wall of the rectangular cavity is arranged in the wood mold on the short axis direction, and the tiepiece slot is internally provided with a tie piece. With the mold, the deformation of the casting can be reduced without the need of ensuring and adjusting the deformation correction quantity by the pilot production of an initial workpiece.

Description

A kind of mould that prevents the rectangle casting deformation

Technical field

The present invention relates to mould applications, be specifically related to a kind of mould that prevents the rectangle casting deformation.

Background technology

As shown in Figure 1 to Figure 3; cast steel valve body cast top is provided with rectangular cavities 1; in cast after coagulation and heat treated process; because the difference of shrinkage stress; produce serious deformation through regular meeting; it is big that its deformation rule is that minor axis dimension becomes, and major axis dimension diminishes, and the deflection of minor axis dimension is than big many of the deflection of major axis dimension.As shown in Figure 4, in order to reduce the deflection of rectangular cavities 1, usually the method that adopts in the casting technique is to shorten size at short-axis direction when making wooden model 2, long axis direction is amplified, and distortion revisal amount 3 promptly is set, along with the size change of rectangle foundry goods is big, distortion revisal amount 3 also increases, but how much can't grasping of deflection will be adjusted distortion revisal amount 3 through after the trial production of foundry goods initial workpiece in advance.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of mould that prevents the rectangle casting deformation, does not need just can effectively reduce through the next distortion revisal amount definite and the adjustment foundry goods of initial workpiece trial production the deflection of foundry goods.

For solving above-mentioned existing technical problem, the present invention adopts following scheme: a kind of mould that prevents the rectangle casting deformation, comprise the wooden model that is located in the rectangular cavities, be positioned at short-axis direction in the described wooden model and be provided with the lacing wire groove that is communicated with the rectangular cavities madial wall, be provided with lacing wire in the described lacing wire groove.

As preferably, described lacing wire is located at the center of lacing wire groove.Guaranteed the pulling force symmetry of lacing wire, effectively reduced the deflection of foundry goods the two side.

As preferably, the thickness h of described lacing wire be rectangular cavities thickness p 1/3 to 1/2.

As preferably, the width k of described lacing wire is 1.2 to 2 times of thickness h of lacing wire.

Beneficial effect:

The present invention adopts technique scheme that a kind of mould that prevents the rectangle casting deformation is provided, and need not just can effectively reduce through the next distortion revisal amount definite and the adjustment foundry goods of initial workpiece trial production the deflection of foundry goods.

Description of drawings

Fig. 1 is the front view of cast steel valve body moulding;

Fig. 2 is the left view of cast steel valve body moulding;

Fig. 3 is the vertical view of cast steel valve body moulding;

Fig. 4 adopts the user mode schematic diagram of existing wooden model for the rectangular cavities of cast steel valve body moulding;

Fig. 5 adopts user mode schematic diagram of the present invention for the rectangular cavities of cast steel valve body moulding;

Fig. 6 is the cutaway view of the rectangular cavities of cast steel valve body moulding.

The specific embodiment

As shown in Figure 5 and Figure 6, a kind of mould that prevents the rectangle casting deformation comprises the wooden model 2 that is located in the rectangular cavities 1, is positioned at short-axis direction in the described wooden model 2 and is provided with the lacing wire groove 4 that is communicated with rectangular cavities 1 madial wall, is provided with lacing wire 5 in the described lacing wire groove 4.Described lacing wire 2 is located at the center of lacing wire groove 4.The thickness h of described lacing wire 5 be rectangular cavities 1 thickness p 1/3 to 1/2.The width k of described lacing wire 5 is 1.2 to 2 times of thickness h of lacing wire 5.After the casting, rectangular cavities 1 is full of molten steel with lacing wire groove 4, and be connected with lacing wire 5, madial wall by 5 pairs of rectangular cavities 1 of lacing wire produces pulling force, basic controlling the deflection of rectangular cavities 1 at short-axis direction, when carrying out castings production, need not just can effectively reduce through the next distortion revisal amount definite and the adjustment foundry goods of initial workpiece trial production again the deflection of foundry goods.

Claims (1)

1. mould that prevents the rectangle casting deformation, comprise the wooden model (2) that is located in the rectangular cavities (1), it is characterized in that: be positioned at short-axis direction in the described wooden model (2) and be provided with the lacing wire groove (4) that is communicated with rectangular cavities (1) madial wall, be provided with lacing wire (5) in the described lacing wire groove (4), described lacing wire (2) is located at the center of lacing wire groove (4), the thickness h of described lacing wire (5) be rectangular cavities (1) thickness p 1/3 to 1/2, the width k of described lacing wire (5) is 1.2 to 2 times of thickness h of lacing wire (5).

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