The continuous development of computing technology and design and manufacturing software applications have contributed to improving clamping devices used in manufacturing processes, which led to an increase in the quality of cut parts. This paper presents a study on the variation of the clamping force depending on the constructive and exploitation parameters of a pneumatic wedge device.

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This scientific paper conceived by the authors describes how to implement and use a new method to quickly identify the optimal gripping surfaces during molding injection of a stove handle. By conceiving, realizing and implementing of an expert system suitable for such robotized operations frequently used in injection systems of plastics, a scientific basis of quick and exact identification of the optimum gripping surfaces is made, calculating precisely the coordinates of the points in which the suction cup axles of the end effector are perpendicular on the surfaces.

Increasing the productivity and quality of products while reducing production costs are the main objectives of manufacturing companies in the market economy. For companies that produce parts using cutting processes, these objectives are strongly influenced, among other factors,by the devices used during the manufacturing process. Devices must allow the clamping of workpieces to be done in a short period of time, to have simple construction, to be cheap while positioning and installing errors to be minimal to ensure that the parts correspond to the manufacturing documentation. The calculation of clamping errors of workpieces and devices involves complex analysis, therefore in order to accurately determine these errors, data obtained from experiments, sometimes costly and difficult to be done, are used. This paper presents the clamping force calculation of a prismatic part, as well as the study of elastic deformations that appear by clamping it in the device, using finite element analysis.

Productivity and quality growth, all together with cost reductions, are the main objectives of modern manufacturing companies. Fixture devices shall facilitate that the workpiece can be changed fast, to have simple construction, to be cheap and affordable, and they have minimal positioning and installation errors. Clamping forces are applied to the workpiece with the help of fixture devices, after being correctly oriented by the application of adjusting forces. In the stage of design, many parameters are taken into account, like strokes and forces necessary, operation time, build simplicity, all which determines the cost of the device. In the field of device design, the main requirements are related to rapid fixing of the workpiece, fixing of more workpieces simultaneously and reducing the effort of labour for the operators. In this paper is presented the research and construction of a circular cam with variable eccentricity used in one this kind of fixture devices.