Sand mould used for casting machine tool double-arm vertical column casting and manufacturing method of sand mould

Abstract

The invention provides a sand mould used for casting a machine tool double-arm vertical column casting. The sand mould comprises a first casting mould unit, a second casting mould unit and a third casting mould unit, wherein the first casting mould unit is used for forming the bottom outer outline shape of the machine tool double-arm vertical column casting; the second casting mould unit is used for forming an inner cavity structure, a side wall outer outline and a vertical face outer outline of the machine tool double-arm vertical column casting; the third casting mould unit is used for forming side wall, inclined face and top face outer outline shapes of the machine tool double-arm vertical column casting; the second casting mould unit comprises a left arm moulding part used for moulding a left arm inner cavity structure of the machine tool double-arm vertical column casting, a right arm moulding part used for moulding a right arm inner cavity structure of the machine tool double-arm vertical column casting, a double-arm in-leg moulding part used for moulding a double-arm in-leg inner cavity structure of the machine tool double-arm vertical column casting, and an outer moulding part used for moulding an outer outline structure of the machine tool double-arm vertical column casting. Besides, the invention provides a manufacturing method of the sand mould and an assembling method of the sand mould.

Description

technical field [0001] The invention relates to the technical field of casting, and more specifically, to a sand mold for casting machine tool double-arm column castings and a manufacturing method thereof. Background technique [0002] Double-arm column castings are used in horizontal machining centers. As the main structural components for the lathe bed and machining tools, they require good mechanical properties and high requirements for dimensional accuracy and internal defects. [0003] The structure of the double-arm column is as follows: figure 1 As shown, there are mostly inner cavities along the periphery, the main body wall thickness is thin, and the structure is complex. The traditional casting process is difficult, and the quality and dimensional accuracy are difficult to control. Mainly reflected in: 1, left side arm 10, right side arm 20 inner cavities and two arms crotch 30 three parts are relatively independent in structure (as figure 2 As shown), in the t...

AI Technical Summary

Problems solved by technology

[0003] The structure of the double-arm column is as follows: figure 1 As shown, there are mostly inner cavities along the periphery, the main body wall thickness is thin, and the structure is complex

The traditional casting process is difficult, and the quality and dimensional accuracy are difficult to control

Mainly reflected in: 1, left side arm 10, right side arm 20 inner cavities and two arms crotch 30 three parts are relatively independent in structure (as figure 2 As shown), in the traditional casting process, these three parts should be designed as three sand cores independent of each other. When the core mold is assembled, it needs to be cored separately. The sand core is easy to loose during the pouring process, resulting in choking defects and wall thickness of the casting. Uneven defects; 2. The gap between the sand cores is not tight enough when setting the core, and the molten iron is randomly strung together during the mold filling, resulting in increased casting seams and increased difficulty in cleaning; 3. When assembling the core mold, it is necessary to make a special clamping plate for size measurement to Accurate control of wall thickness is achieved, the operation is difficult and the size is not easy to control

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