A PROBLEM OF CUTTING OFF THE LAMINATED SEMIS TYPE PLATE

A problem often coped on many domains such as wood manufacturing, glass, plastics and metallic platework industry, is the shaping or cutting off a big plate in many pieces. With this purpose there are algorithms of optimizing for positioning the parts following to be cut off from a row plate. From mathematical point of view, in positioning the parts on a raw plate the number of solutions increase four times evrey time a new part is added, and in case of finding the best solution for about few hundreds of pieces or parts would require years of processing on the most performant computers nowadays – for an analogy remember the famous story with the rice beads which the King had to pay to the master teaching him the chess: twice more for each square of the chessboard; for the total quantity assessment, King ascertained that the crops in his whole life wouldn’t have been enough

LAMINATED OBJECT MANUFACTURING-LOM

The fabrication of stratified pieces (LOM) is a fabrication method where a 3D model is constructed by adding, pasting and cutting the sections in a cycle that repeated starting with the first layer at the bottom of the piece and ending by the last layer at the top of the piece

The Effects of Wet-Pressing and Degree of Refining Upon the Strength Properties of Paper

The dynamic press simulator has great potential to become a reliable tool in the study of wet pressing. This instrumental allows the researcher to duplicate wet press nip conditions in the laboratory. I was unable to complete my planned study concerning the relationship between refining and wet pressing as they effect the development of fiber bonding because of equipment failure. The press loadings and drop heights used in my experiment caused the development of stresses which exceeded the press simulators design limitations. If the dynamic press simulator is to be used to study the wide range of pressing conditions found in the Paper Industry today, design modifications must be made to increase its load sustaining ability. Such modifications would include expanding the base of the simulator to a four post configuration to increase structural rigidity, housing the bearings directly inside the hammer plate eliminating external bearing housing and distributing the load weight over the entire width of the hammer plate to decrease deflections in impact caused by central loading. Finally, the ratchets in the catching mechanism must be extended to perform their function at greater rebound heights

RESEARCH ON INCREASING ACTIVE LIFE OF CUTTING TOOLS

At the exploitation of dies the defections that occur, due mainly to non operating rules of exploration, the improperly conditions of the machine (press) in terms of cinematic precision and the wearing elements in relative motion (ram displacement, wearing guides, etc) as the incorrect mounting of dies on the press. When installing dies must consider several aspects. Among the techniques used, especially for restoring the active elements in the work area are rectified frontal surfaces, hard chromating, hardening with electric sparks and charging welding. Were restored active profile and size of the work active elements so after reconditioning they corresponded in terms of dimensional precision and resistance to wear, like initial element

THE PRINCIPLE ON WHICH THE DIMENSIONAL WORKING IS BASED THROUGH COMPLEX ELECTRICAL EROSION

The Working through complex electrical erosion is a process of removal of the excess of working through repeted action of electrical discharges within the impulse, in the limited space between an electrode connected at one pole and the object of working connected at the other pole, of a tension impulses generator. The paper presents the study of the elementary processes which unfold simultaneously within the elementary working space, as well as the knowing and mastering of the physical mechanism of the drawing material

DETERMINATION OF PHYSICAL EQUATIONS USED IN PROCESS INDUSTRIES USING DIMENSIONAL ANALYSIS

Technological process, however complex, can be broken down into a succession of distinct component processes, in which the input materials undergo changes in shape (mechanical processes), pressure, temperature, concentration, state of aggregation (physical processes) or structure molecular (chemical and biochemical processes). The unitary operations of most process phases in process industries are based on three fundamental processes: pulse transfer, heat transfer, and mass transfer

FMEA - BASIC CONCEPT IN PRODUCT QUALITY

Failure modes and effects analysis (FMEA) is a systematic procedure for analyzing a system (the entire system or just an assembly, subassembly or component) to identify potential failure modes, causes and effects of each failure on system operation. A somewhat different definition was formulated by Goddard Space Flight Center (USA) : FMEA is a procedure whereby every credible way of defeating each item from the lower decomposition level to the highest level is analyzed to determine effects on the system and classify each potential way of failure according to the severity of its effect

DETERMINATION OF PHYSICAL EQUATIONS USED IN PROCESS INDUSTRIES USING THE BUCKINGAM π THEOREM

Technological process, however complex, can be broken down into a succession of distinct component processes, in which the input materials undergo changes in shape (mechanical processes), pressure, temperature, concentration, state of aggregation (physical processes) or structure molecular (chemical and biochemical processes). The unitary operations of most process phases in process industries are based on three fundamental processes: pulse transfer, heat transfer, and mass transfer