for an existing part, he enters the part number to
pull up the program. After loading the tube into
the machine and running a simulation to verify the
tube won’t collide with the bender, he starts the
Then: When changing sizes, the bender operator
always had to change the bend die.
Now: ;e new machine holds a stack of tools;
the operator completes several work orders before
changing the tooling. For example, it can bend a hy-
draulic system part (1⁄ 4 in. OD) and a handrail compo-
nent ( 2 in. OD) without a tool change (see Figure 3).
Kress keeps the most commonly used die at the
bottom because it is the least frequently replaced.
Then: It was impossible to determine interferences ahead of time. After making several bends, if
interference looked likely, the operator often would
have to remove the tube, turn it around, and bend
from the other end. If that didn’t work, he’d have to
try a di;erent bending sequence.
Now: ;e bender’s simulation software looks
for interferences to prevent collisions.
Then: ;e manual protractor was fairly accurate, but not exact. A variance of just a degree or
two on one bend followed by a degree or two on a
subsequent bend would result in a poor fit. In some
cases, especially long parts, the part wouldn’t fit at
all, and would need to be rebent or scrapped.
Now: Every lot of tubing has unique characteristics, but within a single heat, the bend angle precision is approximately ±0.1 degree.
;e cumulative benefit is the biggest benefit of
all, which is the productivity enhancement. Kress
estimates that the CNC machine is about 10 times
faster than the manual process.
Another benefit is meeting its own manufacturing
standards. Kress developed and uses a standard
which keeps it on target for its products and, just as
importantly, for the work it does for another OEM.
;e CNC machine enabled Kress to tighten up its
manufacturing standards, improving its products
and solidifying its business relationship with its
Kress Corp., 227 Illinois St., Brimfield, IL 61517, 309-446-
3395, firstname.lastname@example.org, www.kresscarrier.com
J&S Machine Inc., W6009 490th Ave., Ellsworth, WI
54011, 715-273-3376, email@example.com, www.js
1-800-700-5919 • www.csunitec.com
• Grind from a coarse to
shadow-free matte finish,
up to a mirror polish
• Remove welds, deep
System for Stainless, etc. Slip-on
PIPE-MAX Pipe Belt Sander
• Polish stainless and all metals
• For sanding handrails and
pipes up to 12”
• Grinds weld seams
on flat surfaces
Integrated dust collection port
Dry Miter Cut Saw
• No need for lubricant or manual deburring
• Accurately miter cuts 45˚ left and right
• 4" depth of cut at 90˚ with 10" dia. blade
• Ideal for cutting steel tubes, profiles and more
View demo videos at
Cut Steel, Stainless, Non-Ferrous,
Soft Metals and Composites –
Flat Surfaces / Open and Closed Pipe Constructions
Super Hand-held Dry Cut Saw
Cut 4 3/4" deep. Dry cut steel,
sandwich panels, trapezoidal
sheets, I-beams, metal pipes
and more – without coolant
125/8" Diameter Blade
Grind, Sand and Polish Grind, Sand and Polish
Grind In Corners! Grind In Corners!
Model 9410 ND
Model 608270 U
See us at
Metal Working Tools
and Surface Finishing Solutions
CSU-201311-Fabricator 1-2 pg Fabtech_CSU-Fabricator Half 10/2/13 4: 20 PM Page 1
Simulating the bend process allows the bender sta; to
see how the bend will progress. ;e machine checks for
interferences and collisions, ensuring the tube doesn’t
damage the machine.
In addition to bending hydraulic lines, Kress also fabricates ladders and handrails, which are necessary for
most of its products. ;e company’s CNC tube bender
handles tube diameters from ¼ in. to 2 in.