Automotive Engineering - December 2022 - 21

COVER STORY
Rear-to-front view through Celestiq's aluminum-intensive body structure shows casting predominance in the underbody. Warm forming was key to
bodyside dimensional integrity; 7000-series AL is key to roof-crush performance.
Loveday said, " with a few steel inserts in the B-pillar
for side impact. All castings are 6000-series AL;
5000-series warm-form AL is used on the one-piece
body sides. The warm-forming process employs a single
die and keeps the aluminum near its melting point
about 500 C (932 F). A puff of air over it enables the
final shape of the part.
" Warm-forming enabled us to achieve draft angles
that were just unprecedented without any tearing, "
Roma noted. Hot-stamped 7000-series AL is engineered
into the upper structure to enhance roofcrush
performance.
A 3D-printed showcase
When it launches in late 2023, the Celestiq likely will
be the leading example of additive manufacturing
(AM; 3D printing) in a production automotive application.
The vehicle boasts 115 unique 3D-printed components,
particularly interior trim, according to the engineers.
The program became " a catalyst to accelerate
the additive team " at GM, Roma noted.
AUTOMOTIVE ENGINEERING
" We've pushed them so hard to things like the D-ring on the front
seat belts - that's additive 316 stainless steel with an electroplated
finish, " he said. " When we talked to them the first time about, 'Hey,
we want to do this,' their reaction was like, 'You want to do what?
You want to make a safety-critical element out of a technology that
we've never used before?' " Celestiq will launch with 47 additivemade
interior parts in stainless alloy.
Lavish cabin trim, in an extensive array of materials and surface finishes,
will be key to Celestiq's extreme level of client personalization.
" Quality is the kind of thing when you see it, you know it, " Roma
asserted. " The deco on the center console had to be commensurate
with custom furniture in this vehicle. Every piece of brightwork on
the interior is real, authentic metal. People have accused me of being
obsessive about this, but Cadillac has to go above and beyond.
Otherwise, people are going to come at this looking for plated plastic.
We want to take away those excuses. "
Creating some of the customer-facing parts out of billet, or die
casting, was the team's backup plan. " Fail fast is one of our mantras, "
Loveday said. " So, we started 3D-printing things. And it worked. And
then we started to make them hollow, and it became more efficient. "
Celestiq's AM push raised awareness of the process's expanding
capabilities within other GM vehicle programs. One of the program's
December 2022 21
CADILLAC

Automotive Engineering - December 2022

Table of Contents for the Digital Edition of Automotive Engineering - December 2022

Automotive Engineering - December 2022 - INTRO1
Automotive Engineering - December 2022 - SPONSOR1
Automotive Engineering - December 2022 - CVR1
Automotive Engineering - December 2022 - CVR2
Automotive Engineering - December 2022 - 1
Automotive Engineering - December 2022 - 2
Automotive Engineering - December 2022 - 3
Automotive Engineering - December 2022 - 4
Automotive Engineering - December 2022 - 5
Automotive Engineering - December 2022 - 6
Automotive Engineering - December 2022 - 7
Automotive Engineering - December 2022 - 8
Automotive Engineering - December 2022 - 9
Automotive Engineering - December 2022 - 10
Automotive Engineering - December 2022 - 11
Automotive Engineering - December 2022 - 12
Automotive Engineering - December 2022 - 13
Automotive Engineering - December 2022 - 14
Automotive Engineering - December 2022 - 15
Automotive Engineering - December 2022 - 16
Automotive Engineering - December 2022 - 17
Automotive Engineering - December 2022 - 18
Automotive Engineering - December 2022 - 19
Automotive Engineering - December 2022 - 20
Automotive Engineering - December 2022 - 21
Automotive Engineering - December 2022 - 22
Automotive Engineering - December 2022 - 23
Automotive Engineering - December 2022 - 24
Automotive Engineering - December 2022 - 25
Automotive Engineering - December 2022 - 26
Automotive Engineering - December 2022 - 27
Automotive Engineering - December 2022 - 28
Automotive Engineering - December 2022 - 29
Automotive Engineering - December 2022 - 30
Automotive Engineering - December 2022 - 31
Automotive Engineering - December 2022 - 32
Automotive Engineering - December 2022 - CVR3
Automotive Engineering - December 2022 - CVR4
Automotive Engineering - December 2022 - BETCVR1
Automotive Engineering - December 2022 - BETCVR2
Automotive Engineering - December 2022 - BET1
Automotive Engineering - December 2022 - BET2
Automotive Engineering - December 2022 - BET3
Automotive Engineering - December 2022 - BET4
Automotive Engineering - December 2022 - BET5
Automotive Engineering - December 2022 - BET6
Automotive Engineering - December 2022 - BET7
Automotive Engineering - December 2022 - BET8
Automotive Engineering - December 2022 - BET9
Automotive Engineering - December 2022 - BET10
Automotive Engineering - December 2022 - BET11
Automotive Engineering - December 2022 - BET12
Automotive Engineering - December 2022 - BET13
Automotive Engineering - December 2022 - BET14
Automotive Engineering - December 2022 - BET15
Automotive Engineering - December 2022 - BET16
Automotive Engineering - December 2022 - BET17
Automotive Engineering - December 2022 - BET18
Automotive Engineering - December 2022 - BET19
Automotive Engineering - December 2022 - BET20
Automotive Engineering - December 2022 - BET21
Automotive Engineering - December 2022 - BET22
Automotive Engineering - December 2022 - BET23
Automotive Engineering - December 2022 - BET24
Automotive Engineering - December 2022 - BET25
Automotive Engineering - December 2022 - BET26
Automotive Engineering - December 2022 - BET27
Automotive Engineering - December 2022 - BET28
Automotive Engineering - December 2022 - BET29
Automotive Engineering - December 2022 - BET30
Automotive Engineering - December 2022 - BET31
Automotive Engineering - December 2022 - BET32
Automotive Engineering - December 2022 - BET33
Automotive Engineering - December 2022 - BET34
Automotive Engineering - December 2022 - BET35
Automotive Engineering - December 2022 - BET36
Automotive Engineering - December 2022 - BETCVR3
Automotive Engineering - December 2022 - BETCVR4
https://www.nxtbook.com/smg/sae/24AE12
https://www.nxtbook.com/smg/sae/24AE10B
https://www.nxtbook.com/smg/sae/24AE10
https://www.nxtbook.com/smg/sae/24AE09B
https://www.nxtbook.com/smg/sae/24AE09
https://www.nxtbook.com/smg/sae/24AE08
https://www.nxtbook.com/smg/sae/24AE06
https://www.nxtbook.com/smg/sae/24AE05
https://www.nxtbook.com/smg/sae/24AE04
https://www.nxtbook.com/smg/sae/24AE03
https://www.nxtbook.com/smg/sae/24AE02
https://www.nxtbook.com/smg/sae/23AE12
https://www.nxtbook.com/smg/sae/23AAVE11
https://www.nxtbook.com/smg/sae/23AE10
https://www.nxtbook.com/smg/sae/23AE09
https://www.nxtbook.com/smg/sae/23AE08
https://www.nxtbook.com/smg/sae/23AAVE07
https://www.nxtbook.com/smg/sae/23AE06
https://www.nxtbook.com/smg/sae/23AE05
https://www.nxtbook.com/smg/sae/23AAVE04
https://www.nxtbook.com/smg/sae/23AE04
https://www.nxtbook.com/smg/sae/23AE03
https://www.nxtbook.com/smg/sae/23AE02
https://www.nxtbook.com/smg/sae/23AAVE01
https://www.nxtbook.com/smg/sae/22AE12
https://www.nxtbook.com/smg/sae/22AVE11
https://www.nxtbook.com/smg/sae/22AE10
https://www.nxtbook.com/smg/sae/22AE09
https://www.nxtbook.com/smg/sae/22AE08
https://www.nxtbook.com/smg/sae/22AVE07
https://www.nxtbook.com/smg/sae/22AE06
https://www.nxtbook.com/smg/sae/22AE05
https://www.nxtbook.com/smg/sae/22AVE04
https://www.nxtbook.com/smg/sae/22AE04
https://www.nxtbook.com/smg/sae/22AE03
https://www.nxtbook.com/smg/sae/22AE02
https://www.nxtbook.com/smg/sae/22AVE01
https://www.nxtbook.com/smg/sae/21AE12
https://www.nxtbook.com/smg/sae/21AVE11
https://www.nxtbook.com/smg/sae/21AE10
https://www.nxtbook.com/smg/sae/21AVE09
https://www.nxtbook.com/smg/sae/21AE09
https://www.nxtbook.com/smg/sae/21AE08
https://www.nxtbook.com/smg/sae/21AVE07
https://www.nxtbook.com/smg/sae/21AE06
https://www.nxtbook.com/smg/sae/21AE05
https://www.nxtbook.com/smg/sae/21AVE05
https://www.nxtbook.com/smg/sae/21AE04
https://www.nxtbook.com/smg/sae/21AE03
https://www.nxtbook.com/smg/sae/21AVE03
https://www.nxtbook.com/smg/sae/21AE02
https://www.nxtbookmedia.com