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Design of small hobby CNC milling machine with fixed table
Hanzal, Jiří ; Marek, Tomáš (referee) ; Pavlík, Jan (advisor)
The topic of this work is the design of a small model CNC milling machine with a fixed table for machining wood, plastic, or light alloys (Al, Zn, etc.). It also includes a calculation report and drawing documentation of selected nodes. The beginning of this work consists of an introduction to the issue of milling machines, their distribution and subsequent market analysis. Subsequently, the input parameters are designed on the basis of market analysis and in the last part there is a calculation report, the design of the milling machine itself and a short economic evaluation.
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Machining on a universal milling machine equipped with a divider
Luňáčková, Nikola ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
This bachelor's thesis deals with milling using a dividing device. The aim is to acquaint with the technology of machine milling, its kinematics, machines, tools and about the use of a dividing device. The theoretical part deals with machine milling on a universal milling machine equipped with a cutting device and milling using CNC machines. The practical part compares these two types of milling using a product made on a CNC milling machine and a machine universal milling machine equipped with a cutting device, using the same tool diameters.
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High speed steel milling cutters made by powder matallurgy
Svoboda, Martin ; Sámelová, Vendula (referee) ; Jaroš, Aleš (advisor)
Bachelor thesis is a research work describing milling cutters made of high speed steel by powder metallurgy (HSS PM milling cutters). In chapters one, two and three are generally described milling, high speed steels and powder metallurgy. In chapter four are introduced particular HSS PM milling cutters of a few producers. The summary contains mechanical properties of cutters and suitability for machining. It is focused on main type of HSS PM cutters, which are the end mills.
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Design of clamping device for mass production on CNC milling machine
Blahuta, Jiří ; Foltýn, Jan (referee) ; Svoboda, Petr (advisor)
This bachelor thesis deals with a design of a milling fixture and a fixture for broaching on a press. The fixtures enable progressive production on a CNC machine with a high efficiency and minimal downtime. The fixtures are designed for a serial production of a specific component in automotive industry with quantity of 250 000 units per year. The main goal and partial goals of the thesis were accomplished. The designed milling fixture uses wedge clamps and hydraulic cylinders for clamping. The broaching fixture uses springs to position the workpiece. The design of proposed fixtures was verified by production capacity calculations, which prove that the series will be produced in a required time. To further increase productivity, it was suggested based on calculations to use five milling fixtures in the milling machine. The design of the broaching fixture was verified by FEM simulation, which showed that the device is sufficiently rigid and strong. The result of the work is a design of two fixtures in the form of 3D models and drawings. The work includes, among other things, research of three-axis CNC milling machines, broaching machines, and wrought aluminium alloys.
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Design of multi-functional machining centre
Cvejn, Jiří ; Holub, Michal (referee) ; Blecha, Petr (advisor)
The purpose of this diploma thesis is a design of frame, crossbar, transverse feed, sliding feed of multifunctional machining center. In the first part, there is a brief research of history of machine tool conducted, division of machining centers, materials for frame construction, alternatives of drives of sliding axis. Further, I carry out an analysis of parameters of compeeting machine tools, from which I selected the parameters of our machine. Frame project of the machine, propulsion of axis X and Y, kinematic connection of axis X,Y,Z. Frame of machine is analysed by Finite Element Method. Over the scope of this work I suggest a solution for covering of linear axis as well as their measuring of actual position. 3D model of frame and drives of machine are included in this work. A complete formation has been introduced into the immersive virtual reality environment.
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Milling cutters for CNC machine tools
Janošek, Martin ; Sámelová, Vendula (referee) ; Humár, Anton (advisor)
My bachelor thesis is about milling cutters for CNC machine tools. First the thesis deals with milling theory. There are fission tools or fission machines. Next chapter is about holding tools. The practical part deals with an assortment of production of milling tools for milling flat surfaces made by three milling tools producers. These are Sandvik Coromant, Pramet Tools and Walter companies. In the end of my work these companies are evaluated from different points of view.
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Force loading of milling tools during the machining process
Švec, Michal ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
This thesis compares the force load of two kinds of cutting tool inserts while milling. The thesis is devided into two main parts – research and experiment. The research part is focused on the theory of the force load measuring, cutting tools and cutting tool inserts and their coating. 14 grooves were made with each cutting insert while the force load was measured. Constant cutting conditions were applied. The experiment was repeated four times for each kind of cutting insert. The aim of the thesis is to determine if both kinds of inserts mill with the same force load. The results reveal that one kind of cutting tool inserts mill with the force load higher up to 85 %.
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Production Concept of Special Machining Device for Making of T-Channel Detail
Opršál, Radek ; Osička, Karel (referee) ; Sedlák, Josef (advisor)
The objective of this diploma thesis was the design of a special machine tool that increases the efficiency of the production of a T-slot detail on the part of the clamp body. The thesis deals with the current production of this component as well as the description of the material, the machines that are used and the technological process. The next part focuses on the description of the new special machine tool, its production, heat treatment and the presentation of used indexable inserts. Another part analyses the production innovation that was comprised of the comparison with the former machine tool to the new one. The thesis concludes with a technical and economical evaluation of the former and innovated production.
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Hobby milling machine design
Valášek, Ondřej ; Zemčík, Oskar (referee) ; Dvořák, Jaromír (advisor)
At the introductory part, this thesis deals with description of individual parts of construction and control of CNC machine. Individual parts are described by vievpoint of principle of function, attributes and possibility of implementation on hobby machine. Furthermore is performed brief analysis of commercially manufactured CNC milling machines, which can be purchased on domestic and foreing markets for a purpose of milling wood and eventally aluminuum alloys. Main purpose of thesis is custom desing of CNC milling machine for non-commercial use. Three draft proposals are created first. Then one of them is developen into complete proposal. This design is then subjected to numerical simulation to pre-determine the machine's stiffness and ability to milling aluminium. The result of this simulation confirms the possible use of the machine for milling aluminium alloys. According to the simulation, the maximum deformation for possible machining of aluminium under predetermined conditions is 0.18 mm. In the last part of the work a price calculation was made, determining the approximate cost of the machine production at 75 000 CZK. The work includes a complete drawing documentation of the mechanical parts of the machine.
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