Special Projects – Page 2 – Riggs Machine and Fabricating, Inc.

A Fabrication Story – The Bearing Pedestal

03/20/201904/17/2019RMF

There’s a reason for the fabricating in Riggs Machine & Fabricating. Here’s a perfect example. A client has an older machinery pedestal in very poor condition and needs a new assembly. There are, of course, no design drawings for the item, but luckily we can bring it to our shop.

First we make hand sketches of the unit. We review the original design to see if there were any structural defects that should be improved or any new features that the client would like to have implemented in the current design.

Next, these sketches are converted to CAD drawings and then 3D models are created for fit-up and testing. It’s much faster (and cheaper) to test a new design in 3D than it is after cutting 1/2” thick plates. When we are satisfied with the design, the files are sent out to have plates cut.

This is what we get back from the waterjet cutters (Swift Manufacturing), nice pallet of loose parts. Now fabrication begins. If the designers did their work properly, the welders job should go smoothly.

And here we have the final assembly. From hand sketches to CAD to 3D models to cut parts to fabrication in less time than it takes some companies to return your call.

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

Rail Welding Shears

02/01/201904/17/2019RMF

Used when creating a Butt Weld between two sections of train rail, this shear takes a lot of abuse. At the same time, it must follow very tight tolerances to maintain the profile of the rail (especially when a high speed train is running across it).

A butt weld is created in the field using a mobile electric flash-butt welder. The two sections are joined and electricity is applied to the rail ends. The flash-butt welder squeezes the sections together at very high pressure, permanently joining them, but this also creates a seam at the joint with a segment of slag.

Rail w/Hot Slag after Butt Weld
(notice the manual shear in the background)
“Thermite Rail Welding” by PetrS. 2013 licensed under CC

The RAIL WELDING SHEAR is clamped onto the rail and slid along the rail, by the mobile welder, cutting off the hot slag leaving only a small remainder that will be later ground smooth.

These shears are precision cut out of Nitronic 60 – a high strength metal known for it’s wear resistance – with a wire EDM machine. The EDM unit cuts parts slower, but with more precision than a waterjet or laser cutter.

The final grooves are added via a CNC and the units are then inspected. A hard-surface weld is added and machined to create a precision cutting edge. The parts are assembled to complete the rail welding shear.

These are ready for the rail and making the travels of passengers and goods go smoother and safer.

This video shows a portable flash-butt welder in use. Notice the Rail Shear clamped on the rail before the unit is lowered on the section.

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

Welcome Gregg Nichols to the Riggs Team!

01/24/2019RMF

We’d like to welcome Gregg Nichols to our staff. Gregg has a combined 28 years in Industrial Distribution & Manufacturing Operations and Sales.

His prior experience includes 5 years with Perfection Rubber (operations manager and sales), 18 years with MSC / Dolin Supply (team leader and outside sales) and 4 years with American producers (outside and industrial sales)

The business segments he previously focused on included:

Coal
Construction
Chemical
Manufacturing
Petroleum
Power Generation
Steel Production

Gregg’s areas of expertise include:

Hydraulic Hoses, Tubes and Fittings
Metal working – Machining – Hole Making
Material Handling (lifting and rigging)
Pipes, Valves & Fittings
Safety

Gregg has jumped right in and got off to a strong start. His outgoing personality and years of knowledge have been a perfect fit here at Riggs. Call him for a visit to your facility and see why he’s an invaluable asset to our team!

Industrial Platform Handrail – Ergonomics and Safety

10/31/201804/17/2019RMF

Industrial platforms and walkways typically use one of two types of handrail – round bar or angle.

But recently we’ve seen the addition of a lower handrail, which is more ergonomic and comfortable.

This additional handrail makes transversing stairs much safer. There are no breaks or pinch points as you move your hand along the rail. The placement is more convenient and it just has a better feel to it.

Even better, this handrail can be added to existing walkways and platforms. If you have a heavily trafficked area or a thoroughfare on which you’d like to beef up the safety – rather than replace the entire structure, consider this simple (and cost effective) addition. Give Riggs a call, we’re here to help.

easily added to existing walkways

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

Industrial Classroom Training Aids

08/10/201804/17/2019RMF

If you ever wondered where the custom training equipment in industrial classrooms come from, then look no further than Riggs Machine.

At Riggs we can create custom pieces from scratch, like this “oil flinger” demonstration unit. Shown from conception, with 3D renders, to the final unit in the classroom.

And we also often disassemble, create “cut-away” sections, sandblast, paint and reassemble actual pieces of equipment to be used in working classrooms. These units are used for hands-on training before students hit the field. Much better than a video or book based lecture.

Some of these jobs can be more time and labor intensive than actual repairs! But we don’t mind. We’re proud to be part of the team who help educate the next generation who will be keeping our refineries, steel mills and factories running.

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

The Target Blind – Revisited

08/03/201804/17/2019RMF

Blinds, sometimes known as blanks, isolate a section of pipe for repair, maintenance or testing. There are many types of blinds as we have shown before from the slip blind, the spectacle blind to the bleeder blind.

Here we have a nice assortment of Target Blinds. Used much like the bleeder blind, the target blind is placed on the end of a pipe section rather than in the center of a section. Gauges can be placed on the valves to test the pressure in the section of piping. Sampling can also be taken from the valve if desired.

The different sizes correspond with the different sizes of piping found within the refinery.

This group of target blinds is a bit “beefier” than usual. They will be used during the permanent shutdown of a unit until the demolition of the unit occurs. There may be need for occasional venting of the piping section until the demo.

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

A Phonographic Finish!

06/29/201804/17/2019RMF

No, not what is used when a race is too close to call (that’s a photo finish). But a machined finish added to the raised face on a flange to give an extra level of security to prevent leaks and maintain effective seals.

The Phonographic Finish is actually a serrated finish, either concentric or spiral (much like the grooves on a record), that will grip the gasket between pipe sections firmly.

These finishes are typically added on a lathe to specifications set either by the company ordering the flange, the manufacturer or ASME B16.5 guidelines. Below is a render of the completed flange with bolt holes. I would have included a photo of the actual completed unit, but as soon as it was finished, it was rushed to the job site! But that’s why we’re here. Everyone knows who to call when a custom part is needed in a hurry.

Riggs Machine & Fabricating – Serving industry in KY, OH and WV for over 45 years!

Is Your Scaffold System OSHA Compliant?

06/14/201812/17/2021RMF

Do you use long term scaffolding in place of permanent platforms? Are they stable, secure and up to the new OSHA regulations? Are you still renting your scaffolding and paying for it month after month?

FALL PROTECTION & SCAFFOLDING VIOLATIONS

remain among OSHA’s most frequently cited standard violations.*

OSHA violations are now subject to higher penalties,

this signals a 78% increase in penalty amounts.*

Convert your temporary, unstable scaffolding to a sturdy, permanent structure. No more rentals, no more repairs, no more guard rails that are dangerously low and above all, avoid the fear of those outrageous OSHA fines.

A Riggs Machine representative will review your current needs and outline the best options for your facility. We even offer 3D renders of the unit before construction begins so you can visualize the actual unit design.

Walkways – Handrail – Ladders

Riggs can not only deliver new assemblies for your facility, but update your existing equipment to bring it up to the new standards.

OSHA – Final Rule to Update General Industry Walking-Working Surface and Fall Protection Standards

OSHA – Top Violations

* bdlaw.com – Notes regarding OSHA penalty increases and violation citation frequency.

Engine Case Blower

05/09/2018RMF

This assembly is used in an automobile assembly line. When engine cases come out of a bath after final machining, the fluid needs to be cleaned off before handling and assembly.

This blower unit utilizes a series of Exair Air Knives to create walls of air to blow the cases dry. It also uses a SMC air cylinder to raise and lower the case in and out of the unit.