Spiral Pipe Weld-Bead Cutting with Vertical Spindle Support
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Solution Overview
Problem
Existing inline weld-bead cutting apparatuses for spiral pipes face issues such as shaft bending, inaccurate cutting due to out of roundness, inability to move and install in production lines, and difficulty in repair, leading to increased production costs and defects.
Innovation Solution
The apparatus features a main frame with up-down and forward-backward movement plates, a cutting part with a rotatable spindle and insert, a roundness interlocking part for adjusting to pipe curvature, and a cutting impact prevention mechanism, allowing for accurate cutting and easy relocation and repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutting means is provided as a cantilever with the cutter mounted at the end, then the cutting operation can be performed, but a perpendicular load applies to the shaft and bending moment is generated, causing shaft bending and deterioration of cutting accuracy
Solution Approach 1:
The invention changes the spatial arrangement of the cutting means from a cantilever configuration (extending horizontally from the lifting means) to a vertically suspended configuration (hanging from the lifting means). This dimensional change reorients the load path so that the shaft experiences axial compressive loads rather than bending moments, thereby maintaining cutting accuracy while enabling the cutting operation.
2Ease of operation
If the bead detection sensor detects the location of the bead and adjusts the cutter position, then the cutter can be positioned to suit the weld-bead, but the protruding degree of the weld-bead cannot be detected, causing over-cutting or under-cutting
Solution Approach 1:
The invention introduces a feedback mechanism where the bead detection sensor not only detects the location of the weld-bead but also measures its protruding degree. This feedback information is used to dynamically adjust the cutter's depth and position, ensuring that the cutting operation precisely removes only the protruding portion without over-cutting or under-cutting, thereby maintaining high cutting precision.
3Stability of the object's composition
If the base frame with transfer roller is provided as one main body, then the structure is complete, but it is impossible to move and install the apparatus in a production line where spiral butt-jointed pipes are welded and output
Solution Approach 1:
The invention segments the apparatus into separate functional modules: the base frame with transfer roller, the lifting means, and the cutting means. This modular segmentation allows each component to be independently moved and installed, enabling the apparatus to be integrated into production lines for spiral butt-jointed pipes while maintaining structural completeness and functionality.
4Productivity
If the cutter rotates around a shaft and moves downward through the lifting means, then the cutting can be performed, but the shaft bends due to bending moment and perpendicular load from reaction force
Solution Approach 1:
The invention reorients the cutting means from a horizontal cantilever arrangement to a vertical suspension arrangement. This dimensional change transforms the load type on the shaft from bending moment and perpendicular load to axial compressive load, which the shaft can better withstand, thereby maintaining structural integrity while preserving cutting operation efficiency.
Data Source
AI summary
An inline weld-bead cutting apparatus for a spiral pipe for cutting a weld-bead protruding from a butt-jointed portion of the present invention includes: a main frame; an up down movement plate; a mina up down driving part; a forward-backward movement plate; a forward-backward driving part; and a cutting part provided in the forward-backward movement plate, and cutting a weld-bead protruding on an outer surface of a pipe transferred from the pipe transfer line, and the cutting part includes a mounting plate provided in the forward-backward movement plate to be movable up and down, a rotation motor provided in the mounting plate, a spindle provided in the mounting plate to be rotatable through a bearing, and receiving a rotational force of the rotation motor and having an up down-direction shaft, and a cutting tool mounted on a terminal of the spindle, and including an insert for cutting the weld-bead.