Binding Machine Wire Cutter With Delayed Shearing Load
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Solution Overview
Problem
Existing reinforcing bar binding machines require high-torque motors and result in increased power consumption and machine size due to the high load during wire cutting, which is inefficient and cumbersome.
Innovation Solution
A binding machine with a cutting unit featuring a pair of blade parts where one or both parts are designed to delay cutting and have a crank shape or inclination, allowing for reduced load by varying the timing of wire cutting, enabling the use of low-torque motors and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a high-torque motor and increased drive current are used to handle the load during wire cutting, then the cutting capability is improved, but the machine size enlarges and power consumption increases
Solution Approach 1:
The wire cutting process is segmented into multiple stages through the delay part structure. Instead of cutting the entire wire cross-section simultaneously, the blade parts cut different portions of the wire at different times, dividing the cutting action into sequential segments that reduce peak load requirements
Solution Approach 2:
The blade parts are designed with dynamic cutting characteristics through the delay part, which allows the cutting edge to engage the wire progressively rather than all at once. This dynamic approach transforms a static high-force cutting action into a progressive, time-dependent cutting process
2Force
If a high-torque motor and increased drive current are used to handle the load during wire cutting, then the cutting capability is improved, but power consumption increases
Solution Approach 1:
The wire cutting process is segmented into multiple stages through the delay part structure. Instead of cutting the entire wire cross-section simultaneously, the blade parts cut different portions of the wire at different times, dividing the cutting action into sequential segments that reduce peak load requirements
Solution Approach 2:
The cutting action is transformed from a single instantaneous high-force event into a periodic, time-distributed sequence of cutting actions. The delay part creates a temporal pattern where different wire portions are cut at different times, reducing the power demand at any given moment
3Ease of manufacture
If the wire is cut by shearing resulting from the relative movement of the pair of blade parts, then the cutting function is achieved, but the load upon cutting increases
Solution Approach 1:
The wire cutting process is segmented into multiple stages through the delay part structure. Instead of cutting the entire wire cross-section simultaneously, the blade parts cut different portions of the wire at different times, dividing the cutting action into sequential segments that reduce peak load requirements
Solution Approach 2:
The delay part structure performs a preliminary action by guiding the wire and positioning it such that the cutting blade engages progressively. This preliminary positioning action prepares the wire for cutting in a way that distributes the cutting force over time rather than concentrating it instantaneously
Data Source
AI summary
A binding machine includes a wire feeding unit configured to feed a wire to be wound on an object to be bound, a cutting unit configured to cut the wire wound on the object to be bound, and a binding unit configured to twist the wire wound on the object to be bound. The cutting unit includes a pair of blade parts configured to interpose the wire therebetween and cut the wire. One or both of the pair of blade parts include a delay part which is configured to delay cutting a part of the wire as compared to a remaining part of the wire.