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The need for stamps in manufacturing sectors is generally met by using punch and die systems. In these systems, the desired slug diameter is processed into the die diameter, the punch diameter is reduced by the amount of the cutting gap size and the punching operations are performed on the molds or apparatus. In this study, the slugs obtained by punching holes in MWCNTs (multi walled carbon nanotubes) doped and undoped GFRP (glass fiber reinforced polymer) materials using Ø8 mm punches with 90°, 15°, 30°, V, C type cutting forms in molds with 0.16 mm cutting gap were examined. As a result of the study, it was determined that the slugs obtained in the punch cutting form took the form of punch cutting, and the diameter of the slugs obtained in the punching of the undoped composites with a 90° flat form punch was % 4.75 and % 0.72 larger than the punch and die diameters, respectively. In addition, MWCNTs additive to GFRP composite materials increased the strength of the materials and ensured that the slugs obtained as a result of cutting the material with a punch were more rigid. For this reason, it was determined that the slug diameter of the doped composites was larger than the punch diameter and smaller than the mold diameter. [ABSTRACT FROM AUTHOR]

Sheet metal molds are preferred for punching identical metal, plastic and composite materials, which are widely used in the automotive and household appliances sectors in the industry. Developing technology, increasing production capacity and competition conditions encourage manufacturers to produce more with less cost and to improve production processes. In this study, the variation in cutting force was investigated by drilling holes with uncoated and TIN coated punches in molds with a cutting clearance of 0.025 mm, 0.10 mm, 0.15 mm on pure and MWCNTs-reinforced GFRP composite materials. As a result of the study, it was determined that the average cutting force needed in punching processes using TIN coated punches decreased by % 10.10 and % 4.50 respectively in doped and pure composites compared to uncoated SBZ punch use. In addition, it was measured that with the reduction of the cutting clearance on the die, the need for cutting force increased. [ABSTRACT FROM AUTHOR]

In the industry, drilling method is used to both assemble materials with bolts, rivets and pin joints and to create holes on them. Burring, delamination and material splintering are observed during the drilling of composite materials. Machining parameters, mechanical properties of the drilled material and drill point angle are the most important factors affecting the hole quality. In this study, the effect of the addition of nano-sized additive to glass fiber reinforced composite plates and the effect of these materials on drillability were investigated. It has been observed that the addition of nanoparticles to the laminated glass fiber composite materials plays an effective role in the strength of the material and affects the quality of the holes. Drilling operations which used by constant spindel revolation, if feed rate increases, burring also increases. It is also clear that drilling point angle increase caused drilling hole diameter increment. It was seen that the epoxy layer was separated from the block-shaped glass fiber layer at the outlet of the holes drilled using 90° and 140° angle drills. [ABSTRACT FROM AUTHOR]

At this project, it is analysed the effects of the different gasket sections which are used for panel filters and which provide the leakproofing to the dust holding capacity. At the production of high quality air filters, in addition to using the best percolator, gasket sections which provide leakproofing and which is in accordance with the system of filters mounted on the vehicle have an important place. It is required discontinuation of contact with filter bowl for gasket which serves to prevent the passage of air infiltration due to the pressure difference between the filtered ambient air within the filter.In this mention, the filters, having different gasket sections which provide the leakproofing, have been produced.Firstly, the produced sections have been analysied by modeling with the finite eleman method. At this analysis, the best five leakproofing sections have been determined and produced.After the produced filters has been tested with the specially prepared assembly which is testing the gasket resistance, the results has been observed to coincide with modeling results.At the resulf of this study, the square profile have been seen as the best appropriate to filter complex and the best leakproofing gasket section. [ABSTRACT FROM AUTHOR]

Burring is one of the major problems in plastic injection molding. Minimization of the burr as much as possible brings extra expenditure for manufacturers. Therefore, the amount of burr produced in the time of manufacturing that increases expenditure, had to been kept in the acceptable level by manufacturers. In this study, plastic parts were produced in plastic injection machine by using different injection parameters and the amount of burr had been identified by image processing techniques. Measured burr amounts were used to develop burr prediction mathematical model by using genetic programming which is one of the genetic algorithm-based method. The amount of burr depends on holding pressure, mold temperature, processing temperature and injection pressure parameters. The predicted results were compared with experimental results by the developed mathematical model and it was seen that prediction of mathematical model coincide with measurement. [ABSTRACT FROM AUTHOR]

Plastic parts that are used in filters that are used for fuel on cars working with gasoline and diesel are produced by plastic injection molds. During production of these parts some problems such as burring are encountered. It causes some serious damages if some particles separates from filter and goes into motor or injector. During changing traffic lane or going upside the ramp when you using your car, in case of burring, the car loses its speed, goes out, brake and hydraulic become disabled, as a result there will be dangerous situations for human's life. Burrs on the parts at the end of production should be shaved before assemble. It is an obligation to keep burring in a acceptable limit on filter parts. In this study plastic covers from PA6-GF30 thermoplastic polymer material were produced with different injection parameters. Then, their images are taken by specifically designed system. Blurring amounts are determined by using Matlab software on these images. [ABSTRACT FROM AUTHOR]