Determine 1: The absolutely automated robotic welding work cell, with all actions orchestrated by an AutomationDirect Productiveness PLC, synchronizes the welding course of, robotic actions, and fixture positioning. Supply: Correctly Works
When an organization identified for its experience in welding and metal fabrication secured a contract to offer fencing for development of a bridge, there was no time to lose. Confronted with the daunting job of fabricating over 3 miles of fencing inside 90 weeks, it turned to Correctly Works, a methods integrator with a confirmed file of optimizing manufacturing operations with automation and robotics, to assist develop an answer that will not solely lower the general undertaking timeline, but additionally yield high-quality outcomes.
A typical section of bridge fencing consists of 16 metal pickets secured with over 140 welds. When accomplished manually, every section required roughly 10 hours for setup and welding.
With years of expertise as an business chief in industrial welding and metal fabrication initiatives similar to this, Lancaster, N.Y.-based Seibel Fashionable knew {that a} key to success could be maximizing effectivity. Recognizing the benefit automation would deliver to this tedious course of, work started to make the most of a collaborative welding robotic and develop an automatic fixture to extend effectivity.
Implementing a tabletop-type robotic arm with a welder was the preliminary plan, but it surely was rapidly decided that extra important automation could be wanted. Elma Heart, N.Y.-based Correctly Works approached the undertaking by working alongside the fence producer to combine beforehand impartial methods into a completely automated robotic work cell (Determine 1).
The distinction was plain—an astonishing 12-1 discount in time, with the additional advantage of lowering contact up work by 50%. To higher recognize the profitable outcomes, we’ll take a better take a look at the method that made it attainable.
Collaborators bridge data gaps
With the clock ticking, this may be a collaborative undertaking. Correctly Works and Seibel Fashionable labored to create a specification, with Seibel defining the welding geometry and necessities and the fixturing, whereas Correctly Works utilized sensors and automation for optimum operation and security.
Drawing on its metalworking experience, Seibel Fashionable created the welding fixture powered by Correctly Works’ servo motor pushed rack-and-pinion mechanism to place the robotic for welding. The fixture included clamping and horizontal-to-vertical positioning utilizing a hydraulic carry.
Synchronization of movement with the gantry positioning system for the robotic welding arm was a core requirement to the design.
Welding undertaking requires orchestrated manufacturing
Placing the items of every impartial system collectively required a considerate integration technique. The superior digital welder wanted to speak not solely with the clever robotic, but additionally the methods controlling the welding fixture, the workcell security methods, and the operator controls.
The design additionally wanted the pliability to adapt to completely different fence section configurations. A programmable logic controller (PLC) was decided to be the perfect maestro for the appliance, orchestrating the actions of every management subsystem.
As an impartial methods integrator (SI), Correctly Works deploys these methods utilizing a wide range of manufacturers for robotics, welders, movement management methods, and normal industrial automation merchandise.
When there are not any preliminary outlined necessities driving the work, Correctly Works sometimes prefers selecting AutomationDirect‘s portfolio for automation and movement management because of the complete vary of merchandise, ease of choice, use, and assist, and the distinctive value/efficiency ratio.
Determine 2: An AutomationDirect Productiveness 3000 PLC supplied the programming, reminiscence, and communications capabilities to orchestrate the SureServo2 drive with the robotic welder and different automation. Supply: Correctly Works
For this undertaking, the AutomationDirect Productiveness 3000 PLC was chosen because the controller for the robotic work cell for its versatility and scalability (Determine 2). A large number of options and performance, mixed with massive storage functionality and EtherNet/IP communications all factored into this resolution. This PLC would coordinate movement via an AutomationDirect SureServo2 system.
With hardwired enter/output (I/O) alerts, in addition to IO-Hyperlink linked discrete alerts, and Ethernet and serial digital communications, the PLC simply interfaced with all robotic features, the digital-based welder, security methods, the hydraulically operated welding fixture, and the motion-controlled gantry system for positioning the robotic arm.
The SureServo2 drives a pinion gear which strikes the gantry rack, and the Productiveness PLC has the processing energy and native movement management features to command exact motion whereas seamlessly integrating and coordinating with the automation and robotic elements.
The PLC additionally interacts with an AutomationDirect C-more human-machine interface (HMI), for full visualization of the system.
Inside any robotic work cell, security is paramount. Though the Productiveness PLC doesn’t have native safety-rated features, it interfaces with devoted security elements which might be hardwired to create a piece cell security circuit.
A number of security merchandise have been used within the design together with Dold security relays for monitoring the protection circuit, Datasensing security mild curtains (Class 4, Sort 4) to detect intrusion into restricted areas, and each mushroom pushbutton and cable-pull security switches emergency cease (e-stop) units.
The cable pull will be triggered from any location alongside the cable size, offering a handy security measure contained in the work cell the place an e-stop button will not be inside attain.
To make sure the standard of the completed product, exact positioning of each the robotic and metal pickets is essential for every fence section. Throughout the welding course of, the SureServo2 system controls a rack-and-pinion linear actuator to precisely place the robotic throughout 9 ft. of linear journey.
The PLC manages the robotic’s place alongside the linear entry, in addition to six further axes of movement on board the robotic arm itself. The beginning and cease factors for every weld are decided by the PLC, utilizing suggestions from the SureServo2 system and servo encoder sensor. Software program limits are imposed to guard towards over journey.
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Particular circumstances spark creativity
Though a overwhelming majority of the fence segments have been standardized, it was sometimes essential to assemble and weld particular segments, as an example a partial section with half the variety of pickets. The PLC made it simple for Correctly Works to develop a program in a position to accommodate variations in fence segments.
For every particular case, a “recipe” choice was developed inside the programming logic. Just like how recipes are used within the course of business, utilizing a recipe method made it simple for the operator to dynamically configure the dimensions and kind of every fence section.
To keep up constant, high-quality welds all through the method, the system was designed to handle the consequences of splatter from arcs and sparks on the welding nozzle by utilizing an automated reamer to periodically clear particles from the welding nozzle.
On this software, it was more practical to provoke the cleansing operate timing and sequence immediately from the PLC. This permits the PLC to ship the robotic to the cleansing station on the most handy instances throughout the course of after a particular variety of welds are accomplished, maximizing effectivity whereas lowering weld defects and conserving consumables.
The voltages and currents used throughout welding operations result in the presence of excessive electromagnetic interference (EMI) and radio frequency interference (RFI). To make sure reliability on this harsh EMI/RFI surroundings, shielded cables and equipment like EMC cable clips, have been used to guard the digital tools within the workcell.
Welding on the (graphical) fence
One of many noteworthy options of the system is the intuitive operator interface. Constructed on the C-more HMI panel, the colour touchscreen interface is highly effective but simple to make use of. The HMI includes a graphical illustration of every fence section (Determine 3), illustrating the place of every weld.
The welder has digital fault detection, able to sensing course of situations that can trigger a weld defect similar to improper present or voltage, lack of fuel, or the tip of a wire coil. When a course of anomaly is detected, the system will flag the weld. That is seen on the HMI and makes it simple for the operator to return the system to the house place and reinitiate the weld.
The operator additionally has the power to flag any weld via the HMI whereas they’re observing the method. As well as, the welder can choose particular fence posts, and even particular welds, to both embody within the welding course of, or exclude. This permits operators to do rework as required after inspection.
Determine 3: The C-more HMI exhibits every weld, with a flagging system to simply mark and establish course of defects, enhancing effectivity, simplifying rework, and growing total high quality. Supply: Correctly Works
Shopper sees important, measurable outcomes
The shopper was impressed with how simple the system was to function, and it discovered that any ground worker might efficiently function the tools after minimal coaching. With the brand new automated system, a single fence section might be produced in 45 minutes — an unimaginable enchancment from the unique 12 hours!
Moreover, weld defects have been lowered, lowering the necessity for touchup work by greater than 50%. With confirmed outcomes from the preliminary workcell, the whole operation was expanded to a complete of three methods to extend throughput and maximize operations.
With the tight undertaking timeline, Correctly Works turned to AutomationDirect for many undertaking automation wants together with the PLC, HMI, servo system, electrical merchandise, and security elements. The web site supplies stocking transparency, so it was simple to pick out and immediately procure merchandise that match the technical necessities and timeline with out the additional problem of receiving quotes for varied merchandise via a number of distributors.
Each technical efficiency and industrial features have elevated AutomationDirect to be the popular provider for Correctly Works.
Primarily based on this undertaking exceeding all targets, the shopper is now desirous to pursue further automation initiatives with Correctly Works. With the appropriate integration accomplice and good expertise, even essentially the most daunting manufacturing challenges will be overcome with pace and precision.
In regards to the creator
Dominic Myers is the president of Correctly Works, main a cross-functional workforce offering automation options for normal manufacturing and meals manufacturing. He has greater than 25 years of expertise in enterprise technique, product improvement, and market enlargement, and a confirmed monitor file of delivering modern, worthwhile options throughout numerous industries.
Myers is on the Business advisory board at Buffalo State School, and the board of administrators on the Buffalo Niagara Manufacturing Alliance (BNMA).
