Fibre laser profiling with automated handling is up to 8 times faster than manual plasma cutting.
Norfolk-based Eastern Attachments manufactures class leading construction and agricultural attachments, supplying companies such as Persimmon Homes, Taylor Wimpey and JCB. It has not only survived in a competitive market but excelled to become market leader in its fields of operation. This has only been possible using technologically advanced and efficient production at the firm’s Norfolk facility.
Equipment in use includes a Bystronic 10 kW fibre laser cutting machine with automation to profile components out of mild steel sheet and seven Fanuc robotic welding cells powered by the latest Fronius pulse weld sets to fabricate the products.
Eastern Attachments director Daniel Leslie, one of four brothers who started the firm in 1996 commented, “The UK is known for its strength in high added value engineering, such as aerospace for example, but there is a perception that we cannot compete with low-wage countries in Eastern Europe and the Far East when it comes to manufacturing relatively low value, simple items.
“In 2007, most handling buckets for construction and agricultural equipment in the UK came from overseas, but these days imports are becoming a rarity. Within six months of entering the sectors we had taken half the market for products we manufacture – buckets, handling grabs, forklift attachments and tipping skips – and now produce the vast majority of units sold in the UK.”
His co-director Philip Leslie shed light on how the manufacturer has been able to succeed so dramatically. He said, “It comes down to constant innovation. We are relentless in our pursuit of improvement, adopting a ‘what box?’ attitude to engineering challenges.
“A key part of this process was the early adoption of high strength steels from SSAB (Swedish Steel) back in 2002. They continue to invest in the development of new materials, which will soon see even better steels with a strength-to-weight equivalent to that of titanium and higher than aircraft aluminium.”
Attachments can be made considerably lighter using these materials, so a construction firm or farmer can lift more material to achieve higher productivity, or downsize the machine to reduce capital expenditure. A spin-off advantage of these high strength steels is fewer impurities such as silicon, which is beneficial for achieving better edge quality when laser cutting, especially 12mm and under when using nitrogen rather than oxygen as the cutting gas.
Such comprehensive penetration of the attachments sector has resulted in the company growing by an average of 15 per cent annually for the last decade, but 2017 has been a bumper year with an increase in turnover of over 30 per cent. It is an enviable position but presented the Leslie brothers with the problem of how to keep pace with such a sharp upturn in demand. The situation was particularly acute in the sheet preparation department, where two high-definition CNC plasma cutters were struggling to meet the required output.
The directors had foreseen the situation and recognised three years ago that laser profiling was the way to go. They were waiting for fibre laser cutting to mature, having dismissed the CO2 laser as yesterday’s technology. When Bystronic launched the first-ever high power 10 kW fibre laser machine at the end of 2016 capable of cutting up to 25mm mild steel, they decided it was time to act.
Three other potential fibre laser machine suppliers were considered before the ByStar Fiber 3015 was purchased. The Swiss-built Bystronic equipment was deemed to be preferable, due not only to what at the time was its uniquely high-power, but also to its top quality build and complimentary comments from other users.
A further advantage was the 30-plus service engineers employed by Bystronic UK. Eastern Attachments was already aware of the effectiveness of the supplier’s service department, having used the company’s shearing and press braking machines for several years. Prompt service to maintain high uptime of the ByStar Fiber 3015 is crucial, as it produces nearly all attachment components in the Norfolk facility, with the one remaining plasma machine cutting a small amount of material up to 40mm thick.
The 3 metre by 1.5 metre capacity fibre laser cutter, equipped with a ByTrans Cross for sheet storage and automated material handling to and from the machine, was installed at the beginning of summer 2017, just in time to prevent the need for a second shift on the two manually-loaded plasma cutters. The scale of the difficulty Eastern Attachments was facing can be gauged from the facts that its current factory was built to manufacture 900 units per month, yet in September this year more than 2,000 units were produced.
Achieving more than double the originally planned output was only possible due to automation of the fibre laser cutter. Mr Leslie estimates that the cell, which runs around the clock with eight hours of operator attendance, can typically produce as much in 24 hours as a manually-loaded plasma machine produces in five 8-hour day shifts.
When processing mild steel 5mm thick or less, the productivity improvement is much higher. The sheer speed of fibre laser cutting means that what would take eight hours on a plasma cutter can be achieved in one hour by the fibre laser cell.
Even on thicker gauges, where laser cutting speed is broadly similar to that of a plasma machine, the Bystronic saves time through faster rapid traverse from pierce to pierce and automated loading and unloading of sheet in under one minute, compared with 20 minutes manual load/unload on a non-automated machine.
Daniel Leslie concluded, “The Bystronic has allowed us to increase cut part production dramatically in a small footprint, at the same time raising dimensional accuracy and edge quality. Fabrication is easier, the end products are improved and rework is eliminated.
“We are about to build a new factory nearby that will be four times the size of our existing facility and will be moving within two years. It will allow us to expand even faster into new markets, grow our exports and prevent us from turning away work through lack of production capacity.”