Graduate of the Sheet Metal Department, John Loonie

John Loonie, a graduate of the Sheet Metal Department of the New York Trade School, is pictured welding at work in the Triangle Sheet Metal Works Inc. Original caption reads, "John Loonie - Sheet Metal 1955, one of the Sheet Metal workers employed at the Triangle Sheet Metal Works, qualified to weld." Black and white photograph with caption adhered to reverse.

Students in the Sheet Metal Department at Work

A view of students at work in a classroom in the Sheet Metal Department at the New York Trade School. Black and white photograph.

Graduate of the Sheet Metal Sheet Metal Department David Harning

David Harning graduated from the Sheet Metal Department in 1957 and is shown in his position as Sheet Metal Cutter at the Triangle Sheet Metal Works Inc. Original caption reads, "David Harning - Sheet Metal 1957, is shown at his bench where he lays out all types of Sheet Metal pieces. These pieces will be constructed by other Sheet Metal Workers." Black and white photograph with captioned adhered to reverse.

Blade design and forming for fans using finite elements

The necessity of adapting the standardized fan models to conditions of higher temperature has emerged due to the growth of concerning referring to the consequences of the gas expelling after the Mont Blanc tunnel accident in Italy and France, where even though, with 100 fans in operation, 41 people died. However, since then, the defied solutions have pointed to aerodynamic disadvantages or have seemed nonappropriate in these conditions. The objective of this work is to present an alternative to the market standard fans considering a new technology in constructing blades. This new technology introduces the use of the stainless steel AISI 409 due to its good adaptation to temperatures higher than 400°C, particularly exposed to temperatures of gas exhaust from tunnels in fire situation. Furthermore, it presents a very good resistance to corrosion and posterior welding and pressing, due to its alloyed elements. The innovation is centered in the process of a deep drawing of metallic shells and posterior welding, in order to keep the ideal aerodynamic superficies for the fan ideal performance. On the other hand, the finite element method, through the elasto-plastic software COSMOS permitted the verification of the thickness and structural stability of the blade in relation to the aerodynamic efforts established in the project. In addition, it is not advisable the fabrication of blades with variable localized thickness not even, non-uniform ones, due to the verified concentration of tensions and the difficulties observed in the forming. In this way, this study recommends the construction of blades with uniform variations of thickness. © 2007 Springer.

Theoretical approach including friction for determining strain limits in punch stretching of anisotropic sheet metals

A new analytical theory including friction was developed to assess strain limits in punch stretching of anisotropic sheet metals. This new approach takes into consideration the anisotropic behaviour of sheet materials and could explain the mechanical behaviour of a variety of anisotropic sheet materials. The theory explains the sheet metal failure so for the drawing as the stretching region of the forming limit curve, particularly for materials that present the strain-ratio dependence of limit strain ε 1, where dε 1/dρ is not always greater than zero. dε 1/ dρ or dε 1/dε 2 could be equal to or smaller than zero for a range of materials. Therefore, this new theory can explains such experimental observations, besides to assuming that membrane element relations near the pole, for the case of punch stretching are dependent of sheet metal properties as the process history and also suggests that the onset of local necking is controlled by shear. Thus, theoretical results obtained through this new approach are compared with experimental results available in the literature. It is demonstrated the effect of friction on a FLC curve for both regions, drawing and stretching. © 2010 American Institute of Physics.

Principles and methods of sheet-metal fabricating.

Includes bibliographies.

The new metal worker pattern book; a complete course of instruction in the modern methods of developing and cutting the patterns for sheet metal work, giving the principles underlying practically every problem that is likely to come up in practice and explaining the selection and use of drawing tools and linear and geometrical drawing so clearly that one, who has had no previous knowledge of arithmetic or drawing, may understand these essentials and apply them in using the 253 problems in the development of patterns by the parallel line, conical or flaring, and triangulation systems.

Mode of access: Internet.

A course in sheet metal work for junior high schools /

Includes index.

Cyclopedia of mechanical engineering : a general reference work on machine shop practice, tool making, forging, pattern making, foundry, work, metallurgy, steam boilers and engines, gas producers, gas engines, automobiles, elevators, refrigeration, sheet metal work, mechanical drawing, machine design, etc;

Mode of access: Internet.

The Sheet metal worker's instructor : [for zinc, sheet iron, copper, and tin plate workers, and others; ] containing a selection of geometrical problems, also practical and simple rules for describing the various patterns required [in the different branches of the above trades] /

Mode of access: Internet.

Termite protection with copper shields; a handbook for architects and sheet metal workers - on the application of sheet copper for termite protection.

Col. diagrs. in pocket.

Sheet metal work, instruction paper ...

Mode of access: Internet.

Correlating The Features Of Topography To Friction By Sliding Experiments

Friction can influence the quality of the finished product to a large extent in certain manufacturing processes. Sheet metal forming is a particular case, where the friction between the hard-die and the relatively soft work-piece can be extremely important. Under such conditions, topography of the harder surface can influence the resistance to traction at the interface. This paper discusses about the correlation between certain features of the surface; topography and coefficient of friction based on experiments involving sliding of a few soft metal pins against a harder material. A brief description of the experimental procedure and the analysis are presented. A hybrid parameter which encapsulates both the amplitude features as well as the relative packing of peaks is shown to correlate well with the coefficient of friction.