The project elaborated in frame of engineering studies submits suggestion for changes on technology of production of shallow plate forging. Based on literary pursuit of a problem of metalforming, specifically die forging, in order to save material, closed forging dies were designed for application in precise forging. Plate will be forged without changing machines, except changing dies and skipping flash cutting operation. Project contains drawings of designed dies and technical-economical estimation.

No description available.

Thesis (M.S.)--Ohio University, March, 1985. / Title from PDF t.p.

Spot welding is a process that is widely used in industries worldwide. This project aims to research and develop a control system to improve the strengths of the spot welds. Conventional (pneumatic) spot welding systems do not lend themselves towards in-process control specifically controlling the forging force during welding. The importance of the forging force is that it is related to the dynamic resistance and hence to the rate of heating of the weld as has been shown in this work. The use of the forging force to control weld strengths was investigated by converting the electrode actuating system of a pneumatic spot welder to a motor driven servo system. This enabled the electrode forging force to be varied during welding. The control system was used to vary the forging force during welding by means of various preset force profiles in order to vary the heating during welding. The effects of the various force profiles to heat generation and weld growth were studied by using the dynamic resistance curve. The relationship between resistance and force enables the dynamic resistance to be used as an indicator for weld performance. Experiments were carried out to propose the force profile that will give the highest weld strength. Results obtained from this project shows that two changes in the characteristics of the force profile, viz, the delay time before ramping and the rate of ramping, affects the amount of heat supplied to the weld during welding which causes change in the weld strength. Statistically significant differences between average weld strengths due to the changes in these characteristics are presented. Forging force control was also found to produce stronger welds compared to the conventional electrode clamping force (ECF) condition, which was found to be statistically significant. It was also found possible to extend the weld lobe region of the electrode clamping force (ECF) condition by using forging force control, to produce improved weld strengths at the no weld and expulsion regions of the lobe. The profile that starts with a lower force and ends with a higher force with a longer ramping delay and slower ramping rate was the profile that produces the strongest weld strength among all the profiles tested. This profile with a welding current below the expulsion limit was suggested as the strategy to produce stronger welds at a faster rate.

Thesis (Ph.D.)--McMaster University, 2004. / Supervisor: Dr. Tim Nye. Includes bibliographical references (p. 150-158). Also available via World Wide Web.

The primary objective of this creative project was the exploration of the traditional metalsmithing technique referred to as forging in relation to the primary goal of jewelry, which is body ornamentation. Forging is the hammering of metal with a highly polished hammer upon an anvil with varying blows to create thick and thin sections in the metal. The secondary objective was to implement these forging techniques within nine pieces of jewelry designed to accent various parts of the female body. These jewelry pieces include a wrist cuff, foot and hand pieces, a hip piece, a back piece, a neckpiece, and a pair of earrings. In addition to the production of these forged jewelry pieces, this creative project also included the creation of a number of large human figure fragments based on the female body in which to display the jewelry. This body of work also required the use of lost-wax casting, soldering, patination, and complex construction. / Department of Art

Thesis (M.S.)--Ohio University, June, 1986. / Title from PDF t.p.

Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 154-161).

No description available.

In this paper, Finite Element method and full-scale experiments have been used to study a hot forging method for fabri-cation of a spindle using reduced initial stock size. The forging sequence is carried out in two stages. In the first stage, the hot rolled cylindrical billet is pre-formed and pierced in a closed die using a spherical nosed punch to within 20 mm of its base. This process of piercing or impact extrusion leads to high strains within the work piece but requires high press loads. In the second stage, the resulting cylinder is placed in a die with a flange chamber and upset forged to form a flange. The stock mass is optimized for complete die filling. Process parameters such as effective strain distribution, material flow and forging load in different stages of the process are analyzed. It is concluded from the simulations that minor modifications of piercing punch geometry to reduce contact between the punch and emerging vertical walls of the cylinder appreciably reduces the piercing load. In the flange chamber, a die surfaces angle of 52° instead of 45° is pro-posed to ensure effective material flow and exert sufficient tool pressure to achieve complete cavity filling. In order to achieve better compression, it is also proposed to shorten both the length of the inserted punch and the die “tongues” by a few mm.