Replaceable Rebar Bundling Gun Head for Variable Wire Length and Torque

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Solution Overview

Problem

Existing rebar bundling machines have limitations in size flexibility, requiring multiple machines for various rebar sizes, leading to increased worker burden and costs, and are not efficiently automated due to fixed gun head components that can cause poor bundling, wire wastage, and unstable tightening.

Innovation Solution

A rebar bundling machine with a replaceable gun head featuring a gun head information identification component, such as a resistor, electronic tag, or wireless communication module, that connects to the main control unit to adjust wire length and torque settings based on different rebar diameters, allowing for versatile rebar bundling without the need for multiple machines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed gun head component is used in the rebar bundling machine, then the machine structure is simple and manufacturing cost is low, but the machine can only bundle rebar nodes within a certain size range and cannot adapt to different rebar sizes

Engineering Contradiction:

Improveadaptability to different rebar sizesVSAvoidmachine structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gun head component is divided into multiple interchangeable modules, each designed for specific rebar size ranges. This segmentation allows the system to adapt to different rebar diameters by swapping modules, resolving the contradiction between versatility and structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gun head system is designed with universal mounting interfaces and standardized control protocols that allow different gun head modules to be used with the same base machine. This multi-functionality enables a single machine to handle various rebar sizes without requiring complete redesign, balancing adaptability with structural simplicity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If the gun head component size range is increased to cover all rebar sizes, then the machine can handle more applications, but the bundling precision deteriorates when the rebar size is far smaller than the maximum usable range

Engineering Contradiction:

Improvecoverage of rebar size rangeVSAvoidbundling precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each gun head module is optimized with specific geometric parameters (wire feeding angle, twisting moment arm length, nozzle position) tailored to its designated rebar size range. This local optimization ensures high bundling precision for each module's target application, preventing precision degradation when handling smaller rebars.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If multiple types of rebar bundling machines are used to meet complex rebar bundling work, then the adaptability to different rebar sizes is improved, but the worker burden and tool management complexity increase

Engineering Contradiction:

Improvecoverage of rebar bundling applicationsVSAvoidworker burden and tool management

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The machine incorporates an automatic identification system that reads parameters from the installed gun head module and automatically adjusts control parameters (wire feeding speed, twisting torque, rotation speed). This self-service capability eliminates manual setup and reduces worker burden when switching between different rebar sizes.

Inventive Principle:

Principle #25Self-service

4Adaptability or versatility

If the rebar bundling machine is provided with torque adjustment, then the adaptability to different rebar sizes is improved, but the control system complexity and cost increase

Engineering Contradiction:

Improvetorque adjustment capabilityVSAvoidcontrol system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system automatically changes control parameters (torque, wire feeding speed, rotation speed) based on the installed gun head module's identification data. This parameter adaptation provides torque adjustment capability across different rebar sizes without requiring complex manual controls, resolving the contradiction between versatility and control system simplicity.

Inventive Principle:

Principle #35Parameter changes

5Ease of operation

If a single rebar bundling machine is used, then the tool management is simplified, but the machine cannot fully cover complex rebar bundling work at construction sites

Engineering Contradiction:

Improvetool management simplicityVSAvoidcoverage of rebar bundling applications

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system dynamically adapts its parameters and performance characteristics based on the installed gun head module through automatic identification and parameter loading. This dynamic adaptability allows a single machine to cover complex rebar bundling applications while maintaining simple tool management.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12179947B2Rebar bundling machine, replaceable gun head and working method thereof

Publication Date: 2024.12.31 GUANGDONG SHUNDE HUAYAN ELECTRONICS TECH CO LTD

AI summary

The invention discloses a rebar bundling machine, a replaceable gun head and a working method thereof. The replaceable gun head according to the present invention comprises a gun head information identification component provided on the gun head, wherein after mounting the gun head on the rebar bundling machine, the gun head information identification component is connected to a main control unit of the rebar bundling machine, and the main control unit obtains information of the gun head through the gun head information identification component. The rebar bundling machine of the present invention comprises a gun shell, a main control unit provided in the gun shell, and the replaceable gun head mounted on the front end of the gun shell; in the present invention, the number of rotations for the wire feeding motor and the torque threshold for the wire twisting motor are set for different muzzle information, so as to control the length and torque of the wire output from the rebar bundling machine with different gun heads; the invention can meet the applications of various sizes of rebars combined at construction sites, effectively reduce the burden of workers carrying and managing the rebar bundling machine, and greatly reduce the cost of machinery procurement at construction sites.