Xianchuang Zhejiang Wins Nut Tapping Patent

[Abstract]:Zhejiang Xianchuang Auto Parts Co., Ltd. has been granted the utility model patent for "A Nut Tapping Device" (Publication No. CN 223492247 U), which was filed in December 2024.

Recently, official announcements from the National Intellectual Property Administration reveal that Zhejiang Xianchuang Auto Parts Co., Ltd. has obtained the utility model patent for “A Nut Tapping Device” with the publication number CN 223492247 U. Filed in December 2024, this patented technology focuses on automated and high-precision positioning and tapping for multi-size nuts, providing an innovative solution for efficiency improvement and intelligent upgrading in the fastener processing industry.

In conventional nut tapping processes, positioning accuracy directly determines product qualification rate, while flexible adaptation to multiple sizes has long been a key industry bottleneck. Traditional tapping equipment requires manual replacement and repeated calibration of positioning fixtures for different nut specifications, which is time-consuming and labor-intensive. Manual operation errors often cause tapping deviations. Especially in precision-sensitive fields such as automotive parts, frequent model switching interrupts production continuity and restricts capacity growth. This newly patented device achieves targeted technical breakthroughs to solve the above pain points.

According to the patent abstract, the device consists of four core components: a dedicated tapping base, a built-in servo motor, a top nut positioning plate and a side positioning arc plate. The servo motor is fixed inside the base and rigidly connected to the upper positioning plate, enabling precise rotational driving. The core innovation lies in the structural design of the positioning plate and arc plate. Multi-layer positioning grooves are evenly distributed on the outer ring of the positioning plate with dimensions decreasing layer by layer, covering most mainstream nut specifications.

The automated positioning principle is simple and efficient. The servo motor rotates the positioning plate to align the corresponding-size groove directly below the feeding slot. After the nut slides down into the groove, the semi-enclosed positioning arc plate provides limiting guidance, automatically calibrating and centering the nut with high precision for immediate tapping operation. The entire process requires no manual adjustment, realizing seamless switching and continuous tapping for multi-specification nuts.

The patent delivers prominent practical value for automotive parts manufacturers. Automotive production involves dozens of nut specifications, and traditional production lines require 10 to 15 minutes for each model replacement. In contrast, the new device realizes millisecond-level size switching, improving model change efficiency by over 90%. The mechanical limiting design of the positioning arc plate controls positioning error within 0.02 mm, far exceeding manual calibration accuracy. Calculated based on a production line outputting 10,000 pieces daily, the device increases daily capacity by approximately 20% and reduces the defective rate to below 0.1%.

Industry experts pointed out that the patent fully demonstrates Zhejiang Xianchuang’s technical accumulation in precision processing equipment R&D and fills the technical gap in automated multi-size nut tapping. As high-end manufacturing raises higher requirements for component precision and production capacity, this versatile and high-precision technology is expected to be widely applied in automotive, machinery, electronics and other fields, driving the fastener processing industry toward greater intelligence and efficiency.

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Xianchuang Zhejiang Wins Nut Tapping Patent

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