Exam (elaborations)
Parcial de diseño de máquinas 2 UIS
- Course
- Institution
Parcial resuelto de diseño de máquinas 2 de la universidad industrial de Santamder
[Show more]
Seller
Follow
edgarbuitrago
Content preview
Universidad industrial de SantanderEscuela de ingeniería mecánica.
Diseño de maquina II
Prof. Gilberto Parra R.
Agosto 2020.
El esquema nos muestra un cilindro de hierro fundido de diámetro
interior 800 mm, que tiene una presión que varía desde 20 Kgf/cm2
hasta 80 Kgf/cm2.
El cilindro está unido a la cabeza del mismo de acero de bajo
carbono, por medio de pernos de grado métrico 12.9, si el número
de pernos interiores son las 2/3 partes de los tornillos exteriores y
la fuerza sobre cada perno son inversamente proporcionales a su
radio y el empaque de espesor 5 mm y es de cobre asbesto
Halle el diámetro de los pernos y el número de ellos requerido si el
factor de seguridad es de 2,5.
Considere vida infinita y confiabilidad del 99%.
1400mm
1100 mm
30 mm
5 mm
35 mm
Cobre
asbesto
Fe
800 mm
fundido
, Hallaremos la fuerza máxima aplicada:
F max= p A
2 2
Kgf πx 80 cm
F max=80 2 X =402123,86 Kgf
cm 4
Kgf πx 802 cm2
F min=20 2 X =100530,96 Kgf
cm 4
Longitud de la circunferencia interior:
Li=π Di
Li=πx 110 cms=345,58 cms
Para seleccionar el paso de los tornillos
kgf
Pmax =80 2
=447 psi=7,85 Mpa
cm
Si Pres > 200 psi; 2,0 d≤ Paso ≤3,5 d
Asumo p=3 d; por tanto en el circulo interior habrán
Li 3455,8 mm 1151.9
N ti = = =
pi 3 xd d
Por tanto puedo calcular el N° de tornillos del exterior
2
Del enunciado tenemos N ti = x N te
3
3
N te = x N ti
2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller edgarbuitrago. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76462 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now