Radial Striking Block Blanking for Low-Deformation Bar and Pipe Cutting
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Solution Overview
Problem
Conventional blanking methods for metal bars and pipes result in low efficiency, material waste, uneven force application, large cross-sectional deformation, and high energy consumption, making them unsuitable for mass production and environmentally friendly processes.
Innovation Solution
A blanking machine with a disc-shaped housing and radially distributed grooves, featuring striking blocks driven by motors and transmission assemblies, applies uniform cycling stresses through a V-shaped notch to initiate and expand cracks, ensuring precise separation with minimal deformation and no secondary processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cutting methods (saw cutting, pipe cutter cutting) are used, then flat cut surfaces can be obtained, but production efficiency is low and raw materials are wasted
Solution Approach 1:
The patent replaces conventional mechanical cutting methods (saw cutting, pipe cutter cutting) with a mechanical impact blanking method. Striking blocks driven by motors deliver controlled impacts to the material, causing it to fracture along a predetermined path without traditional cutting mechanics, thereby improving efficiency while maintaining surface quality
Solution Approach 2:
The patent changes the fundamental parameter of the blanking process from gradual mechanical removal (cutting) to instantaneous impact-induced fracture. By controlling impact parameters (force, duration, sequence), the method achieves both high productivity and flat fracture surfaces without material waste
2Productivity
If shearing methods (coreless rod shearing, cored rod shearing) are used, then production efficiency can be improved, but great shearing force is required and energy consumption increases
Solution Approach 1:
The patent employs periodic impact action through motors driving striking blocks in sequence. Instead of continuous high-force shearing, the method uses repeated controlled impacts that accumulate stress in the material, causing fracture at lower instantaneous energy consumption while maintaining high blanking efficiency
Solution Approach 2:
The striking blocks are positioned and sequenced to apply impacts in a predetermined pattern before complete fracture occurs. This preliminary staged action prepares the material for fracture along the desired path, reducing the peak force and energy required compared to conventional shearing
3Productivity
If shearing methods are used, then blanking efficiency can be improved, but cross-sectional deformation increases and secondary machining is required
Solution Approach 1:
The patent applies impacts locally at specific positions around the material cross-section through radially distributed striking blocks. This localized quality control ensures that fracture occurs uniformly across the section without excessive deformation, eliminating the need for secondary machining while maintaining high efficiency
Solution Approach 2:
The blanking process is segmented into multiple sequential impacts from different striking blocks rather than a single shearing action. This segmentation allows controlled fracture propagation through the material, achieving clean separation with minimal cross-sectional deformation
4Ease of manufacture
If conventional blanking methods are used, then material can be processed, but material loss occurs and environmental friendliness decreases
Solution Approach 1:
The patent replaces material-removing cutting processes with a fracture-based blanking method. The material is separated along a predetermined path through controlled impact-induced cracking rather than removal, achieving zero material loss while maintaining full processing capability
Solution Approach 2:
The patent converts the potentially harmful uncontrolled fracture process into a beneficial precision blanking method. By controlling impact parameters and sequence, the natural fracture behavior of the material is harnessed to achieve clean separation without waste, transforming a disadvantage into an advantage
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves high blanking efficiency with reduced material waste, low energy consumption, and precise separation, addressing the limitations of conventional methods by ensuring a flat fracture surface and high straightness of the blanked material.
Implementation Method 1
The plurality of driving members are configured to respectively drive the plurality of striking blocks to alternately and repeatedly strike one end of the bar or pipe material, so that micro-cracks are initiated at the V-shaped notch of the bar or pipe material and steadily extend until the bar or pipe material is fractured
Data Source
AI summary
A blanking machine and a method for blanking a bar or pipe material are provided. The blanking machine includes a blanking assembly and a plurality of driving members. The blanking assembly includes a housing, a plurality of pairs of slide rails, and a plurality of striking blocks. The housing defines a plurality of radially distributed grooves. The pairs of slide rails are respectively installed in the grooves. The striking blocks are respectively slidably installed on the pairs of slide rails. The driving members are configured to respectively drive the striking blocks to reciprocate along the slide rails to strike a material to be processed.