TEM – Thermal Deburring from Rexroth – Precise and Efficient

TEM – Thermal Deburring from
Rexroth – Precise and Efficient

Rexroth – Experts in high-quality
deburring
Rexroth's thermal deburring systems help you to quickly,
precisely, and reliably deburr a wide variety of workpieces.
Profit from our years of experience and know-how to integrate
thermal deburring into your production system efficiently and
economically.
To attain a competitive level of quality, burrs that develop
during machining and other production processes, such as
die-casting, must be removed as quickly, precisely, and
cost-effectively as possible. Complex workpiece geometries
and difficult-to-reach contours require particularly efficient
deburring techniques. TEM systems can be operated either
as stand-alone units or integrated into automated produc-
tion lines.
Reliable, precise, and versatile deburring with TEM
Rexroth's thermal deburring method (TEM) has proved
itself to be a reliable process for quickly and efficiently
deburring complex, safety-related components. Whether on
or in the workpiece – the TEM method removes all existing
burrs and residue on the workpiece in just one step,
whether they are in inaccessible tapped holes or concealed
behind a workpiece edge. The workpiece surface is not
affected by this process.
Advantages at a glance:
Fast
f Cycle time: between 25–45 seconds per machining cycle
f Possible to deburr several workpieces simultaneously
(suitable for series production of large quantities)
f Short change-over times for process parameters and
fixtures
Economical
f Simple fixtures or workpiece bulk deburring in baskets
f Cost-efficient deburring (on exterior and interior) of
complex workpieces with short cycle times
f Method suitable for all workpiece materials
f Ideal for all part geometries
Reliable
f A reliably reproducible and documentable deburring
process (suitable for deburring safety-related compo-
nents)
f Continuous 3-shift operation possible
f Certified TÜV safety

All the essential components in our TEM systems come
from the various business divisions at Rexroth, including
hydraulics, pneumatics, and control technology. As a result,
Rexroth literally provides you with everything from a single
source.
A future-proof investment with Rexroth!
Forty years of deburring experience make Rexroth a
reliable and future-proof partner. Working with our
customers, we develop the right solution for every
application. With Rexroth, you can look to the future
with confidence. Because our TEM machines are
extremely robust and long-lasting, they're a safe and
reliable investment.
In addition to our expertise, we also offer an extensive
range of services, e.g. specific maintenance to ensure
the safety of your systems. We also provide you with
support after you purchase a TEM system. You can rely
on our comprehensive advice and services for excellent
all-round customer support. Contact us. Our compe-
tent experts look forward to offering you a thorough,
systematic consultation.
A workpiece before and after deburring

Deburring in seconds with
TEM systems from Rexroth
With TEM, you can quickly and easily remove cutting burrs
produced by turning, milling, broaching, and grinding, as
well as burrs resulting from die-casting.
How does TEM deburring work?
The thermal deburring method is a thermal chemical pro-
cess. The workpieces to be processed are placed in a pres-
sure chamber that is then filled with a gas mixture and
ignited. Suitable combustible gases are hydrogen, methane,
and natural gas.
The temperature increases within milliseconds to between
2500°C and 3000°C when the gas mixture is ignited. Due to
their surface to volume ratio, the burrs on the workpieces
absorb radiant heat that cannot be diverted into the interior
of the workpiece. This results in an accumulation of heat
that burns up the burr. The resulting oxide is deposited on
the workpiece surface.
Combustion principle of the
thermal deburring process
Deburring chamber
Closure plate
Effect of the gas mixture on the workpiece
geometry. Burrs are burned up.
Gas
Oxygen
Workpiece pre-treatment and after-treatment
To prepare for TEM deburring, the workpieces must be
washed and dried and not contain any grease. The oxide
deposits produced during TEM can be easily removed by
later washing, using acidic or neutral cleaning agents.
1 2
3
TEM installation technology
1 | Unmachined part
2 | First machining
step “deburring”
3 | Machining step
“Oxide reduction”
The cylindrical deburring chamber is fixed in a solid machine
frame. A rotary indexing table holding five closure plates is
integrated in the machine. A hydraulic closing system lifts
the respective closure plate with workpieces from the rotary
indexing table and presses it against the deburring cham-
ber, sealing it so no gas can escape. The gas and oxygen
metered from two cylinders are forced through a mixing
block into the chamber and then ignited by the ignition
system. The deburring intensity can be controlled by the
amount of supplied gas and the mix ratio of the gases. The
workpieces are loaded and unloaded outside the sound
protection enclosure during the machine cycle.

Innovative control technology
and maximum safety
Innovative control technology in TEM systems
TEM-P 80 and TEM-P 350 deburring systems have a stand-
ard, modern control concept based on the latest Rexroth
technology. A powerful industrial PC with integrated Soft
PLC to take over control functions is at the core of the
control system in each version.
Convenient database administration of process parameters
for machining various workpieces is a particular advantage.
During changeovers, these are simply called up in the con-
trol – there's no need to manually exchange mechanical
components in the sound protection enclosure. This is
much faster and results in the greatest process reliability
and reproducibility of deburring results.
The newly developed proportional gas pressure regulation
also substantially improves the process, dramatically reduc-
ing cycle times. In the past, the combustion gas pressure or
oxygen pressure in the gas metering cylinders was only
specified as a control factor. Now, proportional gas pres-
sure regulation readjusts the achieved actual values to the
specified set values. This ensures that the deburring cham-
ber is filled with the same amount of gas mixture during
each machining cycle, resulting in consistent, high-quality
deburring results.
Furthermore, the system displays production data for an
installation or individual station, including shift-dependent
quantities, quantities dependent on the type of workpiece,
cycle times, and operating hours. This data can then be
recorded, evaluated, and stored in the control. Thanks to
graphic process visualization, users can track process pro-
gression on a 15˝ color display. Important information is
displayed, including the switching states of the gas valves,
and can be used by technicians during service operations.
The display is equipped with discrete operation buttons.
Process visualization

Maintenance concept
The machine control comes with a maintenance interface
as standard equipment that permits remote diagnosis when
connected. As a result, Rexroth Service can diagnose oper-
ating states quickly and easily and directly eliminate any
error.
Always on the safe side
An extremely sophisticated safety concept in TEM installa-
tions offers users the highest level of safety. Sensors moni-
tor the chamber charging pressure and closing pressure to
ensure they remain in the normal range. For example, the
control system will not initiate the deburring process if the
minimum closing pressure is not attained. Ignition is
recorded by a sensor and processed in the control system.
If the gas does not ignite, the installation switches off and
ventilates the deburring chamber. A return lock in the gas
flow system protects the equipment from uncontrolled
ignition. The entire installation and system is continuously
monitored for malfunctions. Status messages are output via
a display on the control panel.
Safety-related components (e.g. the gas detector) monitor
the TEM system independently of the machine controller
and shut it off if necessary. This ensures that the TEM
system is in a safe state of operation at all times.
Visualization of the respective
machining state for individual
workpieces

TEM-P 80 and TEM-P 350 – Precise and efficient
deburring of workpieces in any size
The TEM-P 80 and TEM-P 350 have different effective
deburring chamber sizes for customized solutions. The
TEM-P 80 is suitable for deburring smaller parts and the
TEM-P 350 is ideal for deburring larger parts or large quan-
tities of smaller workpieces.
Technical data TEM-P 80 TEM-P 350
Chamber diameter 120 mm 250 or 320 mm
Effective chamber height 150 mm 300/390/450 mm
Chamber charging pressure 5 – 25 bar With Ø 250 mm: 5 – 23 bar
Cycle time (with 100 % cylinder filling stroke) 25 s 45 s
With Ø 320 mm: 5 – 16 bar
Electrical connection 3 x 400 V 50 Hz/MP 3 x 400 V 50 Hz/MP
Connection power 12 kVA 26 kVA
Combustion gas Natural gas/methane Natural gas/methane
Installation dimensions L x W x H Approx. 2.90 m x 1.95 m x 2.85 m Approx. 3.65 m x 2.05 m x 3.35 m
Total weight Approx. 3,800 kg Approx. 13,300 kg