How would you produce the parts shown in Fig. 7.35b other than by tube hydroforming?

1.How would you produce the parts shown in Fig. 7.35b other than by tube hydroforming?

 

By the student. The part could be produced by welding sections of tubing together, or by a

suitable casting operation. Note that in either case production costs are likely to be high and production rates low.

2. Give three examples each of sheet metal parts that (a) can and (b) cannot be produced by

incremental forming operations. By the student. This is an open-ended problem

that requires some consideration and creativity on the part of the student. Consider, for example: (a) Parts that can be formed are light fixtures,

automotive body panels, kitchen utensils, and hoppers.

(b) Incremental forming is a low force operation with limited size capability (limited

to the workspace of the CNC machine performing the operation). Examples of parts

that cannot be incrementally formed are spun parts where the thickness of the sheet

is reduced, or very large parts such as the aircraft wing panels in Fig. 7.30 on p. 372.

Also, continuous parts such as roll-formed sections and parts with reentrant corners

such as those with hems or seams are not suitable for incremental forming.

find the cost of your paper

Explain why attenuation is not a big problem in PET.

Consider a 2-D object consisting of two triangle compartments, as shown in Figure P9.4. Suppose a solution containing a 511 KeV gamma ray emitting radionuclide with concentration f = 0.5….

Give the mean and the variance of the reconstructed image, mean[ˆ f(x, y)] and var[ˆ f(x, y)].

Ignoring the inverse square law and attenuation, an approximate reconstruction for SPECT imaging is given by where c˜() =  {||W()} and W() is a rectangular windowing filter that cuts off at = 0…..

Find the numerical responses in each to an event in crystal C(4, 6).

Suppose a PET detector comprises four square PMTs (arranged as a 2 by 2 matrix) and a single BGO crystal with slits made in such a way that it is….