Showing posts with label holepunch. Show all posts
Showing posts with label holepunch. Show all posts

Friday, November 9, 2018

Machine Design Drawing Room Problems

Here is an older but still interesting book for the machine designer. " Machine Design Drawing Room Problems" by C.D. Albert, was first published in 1923 by John Wiley & Sons. This third edition was published in 1947.

In addition to a good number of specific design problems of various pieces of equipment, the text also covers engineering materials used, and without getting to deeply into the math, outlines the calculations necessary to build machines that will stand up to the required specifications.

To stay with the topic of the previous post, I am posting here part of a design problem titled "Combination Punch And Shear". This chapter is 32 pages so I will just post part of it here, the pictures, and the punch and shear tooling. If someone would like to see the whole design problem, message me, and I will post a pdf of the complete chapter.

Machines like this are not built any more, the modern hydraulic ironworker does similar work in a smaller package. It is still amazing the amount of power that can be achieved from a heavy flywheel, powering a simple eccentric, through a large speed reduction.

Wednesday, November 7, 2018

How To Make A Hand-Operated Holepunch

So as mentioned before I will be uploading a few more "Workshop Equipment" series titles, published by Intermediate Technology Publications.

Today you can download "# 7 How To Make A Hand-Operated Holepunch". As I mentioned before I have taken a bit of time to assemble this file, and you will not find a cleaner version of this title on the internet.

I would consider this project one of the more advanced in the 10 volume series. If you have not done a lot of metalworking before, it is important to go slow and verify your work continually before welding up your assemblies. The finished hole punch will be a great time saver for anyone who requires a lot of holes in sheet metal. It will punch holes up to 25mm or 31/32" in 16 guage  material.

Probably the hardest part of the project will be, making up accurate punch dies. Above 9/32 to 31/32, lacking a suitable supplier, you will have to make your own. Instructions are in the manual.

For holes 9/32 or smaller a cheap alternative is to adapt the punch dies from a hand hole punch, done easily enough.This inexpensive set cost only $34, 10 years ago. It works, but it is a slow process. Installing the dies in your new holepunch would greatly speed things up.

So If you would like to download this nice plan manual, go to my Books - Free Downloads page. # 64 - 4.4 MB - pdf.