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Manufacturing of the hydraulic pump shaft
Nečas, Zbyněk ; Řiháček, Jan (referee) ; Císařová, Michaela (advisor)
The thesis deals with the design of the production technology of the drive shaft of a hydraulic pump, the main element of which is the groove inside the shaft cavity. This component will be manufactured by Metaldyne Oslavany, spol. s.r.o., where the production series was set at 300,000 pieces per year. The material of the component was also specified as DIN 20CrMo5 steel, which will be purchased for production in bars with a diameter of 42 mm. The workpiece will then be cut from them using circular saws. After evaluating the specified requirements, based on the analysis of the specifications, the cold forming technology is chosen for production, specifically the combination of extrusion and upsetting, which the thesis focus on. Three basic production processes were put in place, for which their manufacturability was verified using the Simufact Forming 2023.4 simulation software. For the most suitable production variant, the flow stress, deformation resistance, and forming forces are calculated for each operation, which were then compared with the results of numerical simulation. According to the highest calculated force, a suitable machine was chosen from the company's current machine park, specifically a conventional single-operation hydraulic press SMG HZPU 320 with a nominal force of 320 tons. Then, tool sets were designed for each of the forming operations, when it was found that in all operations the die must be encapsulated using two clamps. The LP4-Kopřiva program was used to determine the optimal contact diameters, contact pressures and other encapsulation parameters.
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The manufacturing process of the ball joint
Petříček, Vít ; Majerík, Jozef (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis deals with the general introduction of the component "ball joint", its construction requirements and production. Two technological processes for the production of a particular spherical pin were selected and presented, namely the production of a cold-forming and a machining. Both methods are compared with each other and their suitability for serial production is assessed. In the final part there is generally shown the technological process of production of the ball pins of the car control.
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Manufacturing of a Wheel Nut With Outer Hexagon
Dvořák, Ondřej ; Forejt, Milan (referee) ; Řiháček, Jan (advisor)
The thesis deals with the design of a production technology for a wheel nut with an external hexagon, a tapered seating surface, and a shank. The production series is set at 200,000 pieces per year. The raw material is a coil of wire with a circular cross-section and a diameter of 20 mm made of steel 11 320. After evaluating the specified requirements and conducting a literature review, the production technology of cold forming is selected, specifically the combination of extrusion and upsetting. Three basic production processes are designed, which are subsequently optimized, and their manufacturability is verified using the simulation program Simufact Forming 1.6. For the most suitable production variant, the flow stress, deformation resistance, and forming forces are calculated for each operation. By comparing with the simulation results, the total force required to produce the given nut is determined, which is crucial for selecting a suitable machine. The forming machine used is a CBF 204L with a nominal force of 3,500 kN, for which a three-operation tool is designed. During the tool design, the internal radial pressure acting on the die is also verified. The results indicate that it is necessary to use encapsulation using a single clamp for the second operation. The tool is constructed to be compatible with the parts of the chosen machine according to the provided layout and available machine parameters.
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The manufacturing process of the ball joint
Petříček, Vít ; Majerík, Jozef (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis deals with the general introduction of the component "ball joint", its construction requirements and production. Two technological processes for the production of a particular spherical pin were selected and presented, namely the production of a cold-forming and a machining. Both methods are compared with each other and their suitability for serial production is assessed. In the final part there is generally shown the technological process of production of the ball pins of the car control.
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