In some manufacturers' literature, you'll see the "section modulus" of leaders as part of the specifications. (Ironically, Vulcan never put this in their specifications.) So what is this? How is it derived? And how is it useful? Are there any things we need to understand in using it? (The answer to the last is "of … Continue reading Section Modulus of Pile Hammer Leaders
Vulcan always tried to be responsive to the needs of its customers. Sometimes, however, the way they wanted to do things got in the way of progress, and the Key Ball Cushion Ring was a good example of that in action. Vulcan had used the "standard pot" to hold its cushion material from the beginning … Continue reading Key Ball Cushion Ring
In the early 1960's Vulcan became involved with the Sand Drain hammers. Part of that effort was developing a servo-pneumatic hook block to grab and lift the hammer and everything else what was attached to it. The device is shown above. Vulcan received a patent for it. Here we'll concentrate on one aspect: the design … Continue reading Stresses for Curved Beams with Rectangular Cross Sections
To download the book click here From the current edition: The new edition of Strength of Materials by N. M. Belyaev has been published after 11 years. In 33 years that lapsed between the publication by N. M. Belyaev of the first edition in 1932 and the last fourteenth edition in 1965 a total of … Continue reading Strength of Materials – Belyaev
It's interesting how many impact pile hammers are designed to "look like a Vulcan." Obviously there are those like Conmaco and Raymond that were "offshoots" of the successful Warrington-Vulcan and Super-Vulcan hammers. All of these hammers are or were air-steam operated hammers. Others have used the ram/column arrangement to develop hydraulic impact hammers, with varying … Continue reading A Diesel Hammer that “Looks Like a Vulcan?”
In 1988 Vulcan personnel visited what was then Leningrad to view the operation of a Soviet variable-eccentric moment vibratory hammer. The account of that is here. This is the field service manual for the hammer. A closeup of the exciter and suspension, clamped to the pile. As is common in Europe, the sheets are picked … Continue reading Field Service Manual for Soviet B402/V402 Vibratory Hammer
Although Vulcan was best known for products based on sand castings, many of Vulcan products--especially those produced by the Special Products Division--were fabricated. An important operation in fabrication is plate bending. Although plate bending is usually associated with sheet metal formation like Vulcan's vibratory power packs, Vulcan also bent plate which is thicker than normal … Continue reading Minimum Bend Radius for Plate Bending
In my last post Hard Currency, Soft Currency and Dollar Hegemony I discussed the effects of sanctions and currency restrictions could have to undermine the unique status of USD. In this post I'll take a look at something that is becoming fashionable to believe in this country: the idea that we should seize assets of Russian … Continue reading Taking Property is Something You Shouldn’t Do Lightly
In its dealings with first the Chinese and later with the Soviets, one of the first things Vulcan learned was the difference between hard and soft currency. That was true both in the travel expenses and in the process of selling equipment (and later buying equipment and technology.) Let's start with the Chinese: this notice … Continue reading Hard Currency, Soft Currency and Dollar Hegemony
To download the book, click here About the Book All machines are built up of parts made of different materials and by various manufacturing processes. Some parts are cast from metals; some are forged, while others are produced by machining on different kinds of machine tools. Castings and forgings have to be machined before they … Continue reading Forging Practice – Kamenshchikov, Koltun, Naumov, Chernobrovkin
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