Rotary cutting die

The circumferential cutting of square tubes is achieved by using the reverse pressure of the inner and outer ring cutting edges of the rotary cutting die, which solves the problem of burrs remaining on the inside, improves cutting quality and production efficiency, and reduces costs.

CN223699486UActive Publication Date: 2025-12-23NINGBO ZHENYU TECH CO LTD
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Patent Information

Application Number
CN202520237900.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-14
Publication Date
2025-12-23
Estimated Expiration
2035-02-14

AI Technical Summary

Technical Problem

Existing direct cutting technology for square tubes suffers from the problem of burrs remaining on the inside that are difficult to remove, affecting product quality and production efficiency, and increasing production costs and complexity.

Method used

The square tube is circumferentially cut using a rotary cutting die. The reverse pressure of the inner and outer ring cutting blades is used to cut from the inside out, leaving burrs on the outer wall for easy removal. The stability and accuracy of the cutting are ensured by an eccentric cam and a transmission gear set.

Benefits of technology

This technology has enabled the production of square tubes with burr-free inner walls and smooth cut ends, improving production efficiency and product quality while reducing the difficulty and cost of subsequent processing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a rotary cutting die which comprises an upper die and a lower die which are opposite, the upper die is provided with an upper frame and an outer ring cutting block, the outer ring cutting block is provided with a placing hole for the outer wall of a square tube to penetrate through, the end, facing the lower die, of the hole is provided with an outer ring cutting blade, the lower die comprises a lower frame, an inner ring cutting block and a ring cutting drive, and the inner ring cutting block is arranged on the lower frame and comprises an inner ring side wall and an inner ring cutting blade facing the end of the outer ring cutting blade. The square tube is inserted into the placing hole, the inner wall sleeves the inner ring side wall, and the ring cutting driver drives the inner ring cutting blade to move along the outer ring cutting blade, so that the inner wall of the square tube is subjected to reverse pressure of the inner ring cutting blade and the outer wall of the square tube is subjected to reverse pressure of the outer ring cutting blade, and the square tube is continuously ring-cut. According to the rotary cutting die, automatic cutting of square tube products is achieved, the cutting end face is smooth and perpendicular to the outer wall, and the inner wall is free of burrs so that follow-up treatment can be facilitated.
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