Welding Head Electrode Speed Control for Metal Mesh
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing machines for producing electro-welded metal meshes face issues with electrode wear, mechanical stress on the frame, alignment of wires, and bulkiness, due to constant high-speed movement of electrodes causing a beating effect, and difficulty in achieving minimal interaxes between longitudinal and transverse wires.
Innovation Solution
A welding head with a fluid-dynamic movement member and sensor systems to control electrode speed and positioning, reducing wear and stress by slowing down electrode movement upon contact with wires, and incorporating positioning guides and feed rollers for precise alignment and reduced bulk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrodes are moved at constant high speed between feed and welding positions, then productivity is improved and machine downtime is reduced, but electrode wear increases rapidly and mechanical stress on the frame increases
Solution Approach 1:
The electrode movement system transitions from constant high-speed motion to variable speed control. The electrode is accelerated rapidly during the approach phase, then decelerated smoothly upon contact with the wire using fluid-dynamic forces. This dynamic speed adjustment allows maintaining high productivity while reducing impact forces that cause electrode wear and frame stress.
Solution Approach 2:
A fluid-dynamic movement member (pneumatic or hydraulic actuator) is used to control electrode motion. The fluid pressure system enables rapid acceleration during approach and controlled deceleration upon wire contact, replacing traditional mechanical drive systems. This pneumatic/hydraulic control reduces mechanical impacts while maintaining high welding speeds, thereby improving electrode life and reducing frame stress.
2Manufacturing precision
If complex and voluminous alignment members are provided to align wires and coordinate welding heads, then wire positioning precision is improved, but device complexity and bulk increase
Solution Approach 1:
Traditional mechanical alignment members (guides, clamps, positioning fixtures) are replaced with a sensor-based detection system. Sensors mounted on the welding head detect wire position and feed this information to a control unit, which adjusts electrode positioning accordingly. This substitution of mechanical alignment with sensor-feedback control reduces device complexity and bulk while maintaining or improving positioning accuracy.
Solution Approach 2:
A feedback control system is implemented where sensors continuously monitor wire position and interaxis dimensions, and the control unit adjusts electrode movement and positioning in real-time based on this feedback. This closed-loop control achieves precise wire alignment and minimal interaxes without requiring complex mechanical alignment members, thereby reducing system complexity.
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 solution reduces electrode wear and mechanical stress, allows for simpler and cost-effective machine design, and achieves precise wire positioning with minimal interaxes, maintaining productivity and quality.
Implementation Method 1
a movement member, which is of the fluid-dynamic type, operatively associated at least with the first electrode in order to move it between the first and the second position
Implementation Method 2
first sensor means associated with the movement member and configured to detect the position of the first electrode with respect to the two wires
Implementation Method 3
a welding unit by means of which the longitudinal wires are attached by welding to corresponding transverse wires
Implementation Method 4
both the electrodes contact and grip the two wires to be welded and apply different tensions determining the welding of the two wires
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Welding head for the formation of a metal mesh comprising longitudinal wires (12) and transverse wires (13), comprising at least a feed unit (16) able to feed step-wise a plurality of longitudinal wires (12), and a welding unit (17) by means of which the longitudinal wires (12) are welded to corresponding transverse wires (13). The welding unit (17) comprises at least two electrodes (19,20) selectively movable between a first feed position, in which at least a first electrode (19) is distant from the transverse (13) and longitudinal (12) wires, and a second welding position, in which both the electrodes (19,20) contact and grip the wires (12,13) and apply different tensions in order to weld the wires to each other (12,13). The welding head comprises at least a movement member (22) operatively associated at least with the first electrode (19) in order to move it between the first and the second position, first sensor members (25) associated with the movement member (22) and configured to detect the position of the first electrode (19) with respect to the two wires (12, 13) and/or second sensor members (30,31) associated with the movement member (22) and conformed to detect the working pressure of the first electrode (19).