Composite fixture

Abstract

The invention provides a composite fixture which comprises a vertical plate-shaped fixture body and at least one clamping device assembly. The clamping device assembly comprises two gripper jaws and cylinder driving systems arranged at the tail ends of the two gripper jaws; each cylinder driving system comprises a housing and a cylinder arranged in the housing, and a piston rod of the cylinder is connected with one gripper jaw so as to drive the gripper jaw to carry out relative movement; and the clamping device assembly is fixedly arranged on the fixture body and allows the two gripper jaws to extend out of the edge of the fixture body so as to clamp an object. When the composite fixture is used for setting a sand core, the sand core can be smoothly placed into a sand mold cavity, so tilting of the sand core and colliding between the sand core and a sand mold in the process of placing are avoided, integrality of the sand core and the sand mold cavity is maintained, and the quality of a casting is improved; furthermore, automatic core setting by using the composite fixture enables production efficiency to be enhanced and the level of manufacture technology for railway vehicles to be comprehensively elevated.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a composite fixture used for setting cores in a casting process. Background technique [0002] Many components of rail vehicles are manufactured using casting processes. Many of these parts are typical box structures, such as bolsters and side frames. Molds and cores are used in the casting of these parts, and in many cases the molds used are sand molds and the cores are sand cores. Because these sand cores have large contours and many weak points, the process of clamping or lifting can easily cause damage to the sand cores. [0003] A core setting method often used in the prior art is to hang two cloth belts on both ends of the beam of the spreader in the workshop, and the two cloth belts hold the sand core from the bottom of the sand core and lift it into the sand mold cavity , after putting down the sand core, pull the cloth belt out from the bottom of the sand core. [...

AI Technical Summary

Problems solved by technology

Damage to sand cores or sand mold cavities will cause castings to fail to meet quality requirements, seriously affecting the manufacturing process level of railway vehicles

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