Semi-hollow self-punching riveting screw with fastening thread and self-punching riveting equipment and method

Abstract

The invention provides a semi-hollow self-punching riveting screw with a fastening thread. The screw is characterized by comprising a rivet body with a semi-hollow structure, and a thread head which is arranged on the upper end face of the rivet body and provided with the fastening thread. The bottom of the thread head is provided with a cutter withdrawal groove facilitating cutter withdrawal after thread machining is finished. The outer diameter of the rivet body is the same as that of the thread head. The invention further discloses self-punching riveting equipment method adopting the riveting screw. An improved self-punching riveting rod pushes the semi-hollow self-punching riveting screw to achieve riveting and forming of thin plates, and then mechanical connection between thicker plates is achieved by means of a thread mechanism. The screw is simple in structure form, machining and manufacturing are facilitated, the cost is low, the limitation to a traditional semi-hollow self-punching riveting screw from the thickness of riveted plates is overcome, and mechanical connection between three-layer or multi-layer thicker plates can be achieved.

Description

technical field [0001] The invention belongs to the field of connecting metal and non-metal plates, and in particular relates to a semi-hollow self-piercing riveting screw with fastening threads and self-piercing riveting equipment and method, especially suitable for the same type and different type with high strength and thickness Mechanical connection of metallic materials and most non-metallic materials. Background technique [0002] Thin metal and non-metal sheets are widely used in the machinery industry and the automobile industry. Self-piercing riveting technology is a new type of thin sheet connection technology that replaces traditional resistance spot welding. It does not require pre-punching like traditional riveting technology. The process is simple, and the semi-hollow self-piercing rivet and the light alloy plate are plastically deformed together to form a mechanical inner lock and realize a firm mechanical connection; it is especially suitable for the tightnes...

AI Technical Summary

Problems solved by technology

[0002] Thin metal and non-metal sheets are widely used in the machinery industry and the automobile industry. Self-piercing riveting technology is a new type of thin sheet connection technology that replaces traditional resistance spot welding. It does not require pre-punching like traditional riveting technology. The process is simple, and the semi-hollow self-piercing rivet and the light alloy plate are plastically deformed together to form a mechanical inner lock and realize a firm mechanical connection; it is especially suitable for the tightness of 2-6mm light alloy and composite material plates that are difficult to weld. However, due to the limitation of the rivet material and its size, the plastic deformation of the rivet during the riveting forming process should not be too large, otherwise it will cause the rivet to break and fail. connection is causing difficulty

[0003] A utility model patent (application number 201520328312.5) discloses a threaded rivet. The patent adds a drill head to the head of the rivet to realize one-step riveting by removing material. The requirements are high, the cost is high, and it is not suitable for the riveting process of the existing semi-hollow self-piercing riveting equipment. The internal thread involved in this patent is to be fixed on the riveting gun, and has no actual connection function

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