High-Frequency Transformer Layout for Flash Welding Billets
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Solution Overview
Problem
Existing flash welding machines for longitudinal metal objects face challenges in accessibility due to the large size and weight of the transformer group, which complicates maintenance and increases the overall machine size.
Innovation Solution
The welding machine incorporates a power group with a transformer of small dimensions and low weight, operated at frequencies above 700 Hz, allowing for reduced size and increased accessibility without significant increases in machine size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large transformer group is used to provide the required welding energy, then the power delivery capability is improved, but the machine size increases and accessibility for maintenance deteriorates
Solution Approach 1:
The patent applies parameter changes by operating the transformer at high frequency (above 700 Hz) instead of conventional low frequencies. This frequency parameter change enables the transformer to deliver the same welding power with significantly reduced dimensions and weight, resolving the contradiction between power delivery capability and accessibility for maintenance.
2Reliability
If the transformer group is positioned close to the welding clamps, then the electrical impedance is reduced, but the accessibility and maintenance difficulty worsen
Solution Approach 1:
The high operating frequency (above 700 Hz) enables the use of a compact transformer that can be positioned close to the welding clamps while maintaining low electrical impedance. The reduced size at high frequency allows optimal electrical positioning without compromising maintenance accessibility.
3Adaptability or versatility
If the machine size is reduced to improve versatility, then the space efficiency is improved, but the capacity to accommodate standard maintenance equipment deteriorates
Solution Approach 1:
By operating at high frequency (above 700 Hz), the transformer dimensions are dramatically reduced, allowing the overall machine size to be minimized while still accommodating standard maintenance equipment and providing adequate working spaces for operators.
4Device complexity
If conventional low frequency operation is used, then the transformer design is simpler, but the transformer dimensions and weight increase significantly
Solution Approach 1:
The patent changes the operating frequency parameter to above 700 Hz, which enables the transformer to achieve the required power delivery with significantly reduced weight and dimensions while maintaining acceptable design complexity through the use of modern high-frequency transformer technology.
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
This solution enhances accessibility and ease of maintenance while maintaining adequate operating functionality and construction costs comparable to similar known machines.
Implementation Method 1
a power group, provided with conductors connected to the two structures to supply electric current to the tail and head of the two products to be welded
Implementation Method 2
a controlled current flow is caused to flow through the two faces of metal products which must be welded together. This passage of current creates energy that brings the two faces to the melt temperature
Implementation Method 3
the two surfaces are crushed together so as to amalgamate them together until they are completely joined
Data Source
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AI summary
The present invention relates to a welding machine (1) of the flash welding type, intended to weld together the tail of a first longitudinal metal product with the head of a second longitudinal metal product along an advancement direction (X). The machine comprises: - a carriage (10) adapted to slide along the advancement direction (X); - a first structure (20) with first gripping means (21, 22); - a second structure (30), which is slidingly supported by said carriage (10) with second gripping means (31, 32); - a power group (40) which can be supplied with mains voltage and is provided with conductors (210; 121, 122), connected to the first gripping means (21, 22) and the second gripping means (31, 32), respectively. The power group (40) comprises: - at least one inverter (41); - at least one transformer (42); - at least one rectifier (43); - a control unit (50). The inverter (41) is a single-phase or poly-phase inverter with variable frequency. The control unit (50) being programmed to operate said inverter (41) at frequencies greater than 700 Hz. The transformer is sized to deliver a predetermined nominal power Pn at a predetermined nominal supply frequency fn. Having defined an operating power Pex to be generated during welding, alternatively: - said predetermined nominal power Pn of the transformer is less than said predetermined operating power Pex and said nominal supply frequency fn is less than 700Hz, said at least one transformer (42) being sized so as to deliver, at frequencies greater than 700HZ, an actual power Pe equal to or greater than said predetermined operating power Pex; or - said predetermined nominal power Pn of the transformer is at least equal to said predetermined operating power Pex and said nominal supply frequency fn is greater than 700Hz, said at least one transformer (42) being sized so as to deliver, at frequencies greater than said nominal supply frequency fn, an actual power Pe greater than said predetermined operating power Pex.