Necking die for water sealing neck machining and necking machining method

Abstract

The invention discloses a necking die for water sealing neck machining and a necking machining method. Through the necking die and the necking machining method, the requirement for machining water sealing necks with different depths is met, and the scrap ratio is lowered. The necking die comprises a die holder, a universal joint, a connecting rod, a synchronous die body and a locating die body, wherein a containing hole is formed in the middle of the die holder, and a through groove is formed in the center of the upper portion of the die holder; the universal joint is arranged in the containing hole, and the connecting rod is arranged in the through groove; one end of the universal joint is fixed to the middle of the connecting rod, and the other end of the universal joint is fixed to thecenter of the bottom of the die holder; the synchronous die body is located on the upper portion of the connecting rod, and the center of the connecting rod is coaxial with the center of the synchronous die body; the locating die body is arranged above the synchronous die body, and the lower portion of the locating die body penetrates through and is fixedly connected with the die holder and is coaxial with the die holder; and a groove ring for machining a water sealing neck is formed by an opening in the upper end of the synchronous die body and the upper portion of the locating die body. During machining, the synchronous die body eccentrically and synchronously rotates, stripping of a workpiece can be guaranteed while a deeper water sealing neck forming effect is achieved; and due to themovement of the synchronous die body in the radial direction, the workpiece is prevented from slipping and stopping rotation, and the machining quality is guaranteed while the water sealing neck can meet the preset requirement.

Description

technical field [0001] The invention relates to workpiece processing machinery and equipment, in particular to a necking mold and a necking processing method for processing the water sealing neck of an inner tank. Background technique [0002] Existing metal cups, such as stainless steel thermos cups, a more commonly used water sealing structure is the sealing ring of the cup lid and the water sealing neck of the neck of the cup to seal the water. The neck mold is subjected to necking processing to form a water sealing neck. The conventionally used necking die is a concave die, with a groove at the corresponding position; when processing, put the workpiece to be processed outside the mold, the power shaft rotates the mold, and drives the workpiece to rotate at the same time, and then uses the cutter wheel to approach and match the mold The groove forms a sealing water neck at the corresponding position of the workpiece. [0003] For example, CN 203030701U discloses a mold ...

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Problems solved by technology

[0004] When the above-mentioned necking mold is used to process the water sealing neck, the processing of the water sealing neck is realized through the groove and the cutter wheel in the necking mold, but there are still several problems: one is that different necking needs to be replaced when processing different water sealing necks It is very time-consuming and laborious to disassemble and install the mould. Second, due to the rigidity of metal materials such as stainless steel, the depth of the water sealing neck formed is often not up to the requirement. If the groove of the necking mold is designed deeper, the depth of the water sealing neck can be deeper. For the purpose, due to the ductility limitation of metal materials such as stainless steel, holes are prone to appear in the relative position of the workpiece, resulting in scrapping; the third is that there is a rigid collision between the cutter wheel and the necking mold, and the workpiece is driven by the mold to rotate. In the middle, the cutter wheel enters the tool, and the slip between the workpiece and the necking die will easily cause the workpiece to not move, resulting in scrap

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