1) BSH Home Appliances Group is a leading manufacturer of home appliances founded in 1967 as a joint venture between Bosch and Siemens. 2) BSH's Slovenian subsidiary in Nazarje produces around 7 million small appliances per year, including food processors, blenders, and juicers. 3) BSH uses simulation tools like ANSYS to analyze the structural integrity and performance of appliances to improve designs, such as optimizing a stick mixer to withstand drops and analyzing mixing in blenders.

1. B S H H O M E A P P L I A N C E S G R O U P
Using simulation tools for improvement of small home
appliances design
Ansys Convergence Conference
2016
25th May 2016
dr. Henri Orbanić, Marko Žilnik

2. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 2
©BSHHišniaparatid.o.o.Nazarje,2016
About BSH HOME APPLIANCE GROUP
 Founded in 1967 as a joint venture between
Siemens AG and Robert Bosch GmbH
 Since the beginning of 2015 BSH fully belongs to the
Bosch Group
 Market leader in Europe, No. 2 in the world
 Product portfolio: all modern home appliances
 Employees worldwide: 56,500
 Around 3,500 R&D specialists in BSH’s international
production and development network
BSH Hausgeräte GmbH
Founded in 1967
Robert Bosch
GmbH
100%

3. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 3
©BSHHišniaparatid.o.o.Nazarje,2016
BSH’s product portfolio covers the entire spectrum for daily life

4. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 4
©BSHHišniaparatid.o.o.Nazarje,2016
Short presentation of BSH Hišni aparati d.o.o Nazarje, Slovenia
 ~1200 employees
 ~7 million appliances produced
per year
Two branches:
 Food preparation
 Beverages preparation

5. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 5
©BSHHišniaparatid.o.o.Nazarje,2016
Products developed and produced in Nazarje – Food preparation
Food processors Kitchen machines Stick mixers
Hand blenders
Blenders
Juicers Citrus pressChoppersMeat grinders

6. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 6
©BSHHišniaparatid.o.o.Nazarje,2016
Using ANSYS in Food preparation department
 Personnel: two part-time simulation engineers
 Hardware:
– Two simulation workstations Dell T7910 with 16-cores each
 Software:
– Structural analysis:
– ANSYS Mechanical (Static structural, Transient structural, Modal, Thermal)
– ANSYS Explicit STR (Impact testing)
– CFD analysis:
– ANSYS Fluent

7. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 7
©BSHHišniaparatid.o.o.Nazarje,2016
Structural analysis simulation in
BSH Hišni aparati d.o.o. Nazarje

8. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 8
©BSHHišniaparatid.o.o.Nazarje,2016
Stick mixer drop test
 The user has to be prevented from touching live electronics if the appliance is
damaged after it is accidentally dropped on the floor.
 Thus the appliance housing must not open if it falls from the kitchen counter.
 One of our stick mixers had problems with this test.
 The goal was to have a solution which would be cheap and easy to implement as the
modifications to the moulding tools are expensive.
High speed camera – 1900 fps
t=0 t=2,63 ms t=4,74 ms

9. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 9
©BSHHišniaparatid.o.o.Nazarje,2016
Simulation setup
Cross section
Mass to
simulate motor
and electronics
Gravity +
initial
velocity
Fixed
floor
Housing
material: ABS

10. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 10
©BSHHišniaparatid.o.o.Nazarje,2016
The existing situation
 The simulation was performed in ANSYS Explicit STR.
 First the simulation of the existing situation was performed.
 The simulation showed similar opening of housing as in real drop. Thus we could proceed to
modifying of housing design.

11. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 11
©BSHHišniaparatid.o.o.Nazarje,2016
Solution
 After the modification of locks the housing did not open anymore

12. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 12
©BSHHišniaparatid.o.o.Nazarje,2016
Drop test of packed appliances
 Software: Before - outsourcing LS-DYNA,
Now – ANSYS Explicit STR
 Lateral drop test from the height of 50 cm,
v0 = 3,13 m/s, angle to the ground 10°
10°

13. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 13
©BSHHišniaparatid.o.o.Nazarje,2016
Drop test - plastic strain analysis

14. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 14
©BSHHišniaparatid.o.o.Nazarje,2016
Bosch MUM5 blender locking mechanism structural problem
 Problem: the geometry and material was changed. During usage the locking mechanism
broke.
 The problem was solved by the design change .

15. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 15
©BSHHišniaparatid.o.o.Nazarje,2016
CFD simulation in BSH Hišni aparati
d.o.o. Nazarje

16. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 16
©BSHHišniaparatid.o.o.Nazarje,2016
Stick mixer performance analysis
water
level
pressure
outlet
water
rotation zone
air

17. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 17
©BSHHišniaparatid.o.o.Nazarje,2016
Simulation parameters
 Two phase water-air VOF model
 High rotational velocity ~ 12000 rpm  turbulence
 Transient formulation

18. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 18
©BSHHišniaparatid.o.o.Nazarje,2016
Mixing analysis
 Inserting tracer liquid and observing the uniformity of mixing

19. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 19
©BSHHišniaparatid.o.o.Nazarje,2016
Bosch MCM6 food processor blender attachment

20. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 20
©BSHHišniaparatid.o.o.Nazarje,2016
Simulation parameters
 Two phase water-air VOF model
 0.75 l of water was simulated
 Rotational velocity – 6000 to 12000 rpm,
 Transient formulation

21. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 21
©BSHHišniaparatid.o.o.Nazarje,2016
Kneading bread dough
 Bread dough – mainly mixture of wheat flower and water.
 Depending on the flower-water ratio, the dough can be a
dry plastic ball or a soft sticky mass.
 Points of interest:
– obtaining load regime on the machine,
– studying the kneading process – kneading efficiency.

22. B S H H O M E A P P L I A N C E S G R O U P Using simulation tools for improvement of small home appliances design | 25th May 2016 | Slide: 22
©BSHHišniaparatid.o.o.Nazarje,2016
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