Precision lifting and positioning device for inner-support mold tire at conical bottom of storage box

Abstract

The invention relates to a precision lifting and positioning device for an inner-support mold base at the conical bottom of a storage box. The precision lifting and positioning device comprises the inner-support mold base, an external pressure system, a transition connecting ring positioning device, a base, an inner-support mold base guide seat, milling positioning blocks and welding positioning blocks. The external pressure system presses a large-size thin wall curved surface component to the inner support mold base. A transition connecting ring is fixed through the transition connecting ringpositioning device. When the milling positioning blocks are used for milling, the milling positioning blocks are clamped between the base and the inner-support mold base, and the relative height between the base and the inner-support mold base is kept; and when the welding positioning blocks are used for welding, the welding positioning blocks are clamped between the base and the inner-support mold base, and the relative height between the base and the inner-support mold base is kept. According to the precision lifting and positioning device, by arranging the milling positioning blocks, the precision of the ascent height of a conical circular ring is guaranteed in the milling process of the conical circular ring, and accordingly precision positioning of a milling device and the conical circular ring is guaranteed; and by arranging the welding positioning blocks, the descent displacement of the inner-support mold base can be precisely adjusted in the theoretical joint seam position.

Description

Technical field

[0001] The invention relates to a precise lifting positioning device for an inner support type tire with a cone bottom of a storage tank, which belongs to the technical field of welding. Background technique

[0002] Friction stir welding is a solid phase welding method. Its welding principle is to use a non-loss stirring head to rotate and insert the welding interface of the part to be welded to move forward. The stirring and friction of the material to be welded by the stirring head The material is heated to a plastic state. Under the high-speed rotation and extrusion of the stirring head, the weld metal in the plastic state moves forwards and backwards around the stirring head. Under the combined action of thermo-mechanical, the material is diffused and connected to form a dense intermetallic solid. Connected. This method eliminates the root cause of pores-melting and crystallization, thereby reducing weld defects, significantly reducing the residual stress an...

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