As I wrote in the article Hadfield Steel, prison steel, milling, the aforementioned steel grade is difficult to machine. This is due to the specific austenitic properties of high manganese steels (Hadfield steels). These steels have very high tensile strength (from 350 to 900 MPa), which increases even to 2000 MPa (2 GPa). The increase…
By referring to the literature, we can search for a lot of information about milling as a machining method. This article addresses contemporary aspects of this type of machining. In addition to machining with conventional parameters (conventional and CNC machines) I referred to high-speed machining and machining of difficult-to-cut materials. Currently, milling works as an…
Machining holes in the sleeve and disc class parts plays an important role. When we pay attention to the general technological processes of these parts, in the case of classic technological processes, the general technological process of the sleeve class parts with hole-based is used. Selected problems of hole machining are presented below. Information about…
The main time (tg – main machine time or main manual time) is a component of the standard of technological times. Its definition is one of the key components of the production process schedule. The more efficiently determine the main time, the more accurate estimates of production costs. Scheduling is the basis of any process,…
The shaft technology is a very popular subject in the process of technological education. There is an independent class of shafts as a class of parts in the technological context. Parts of this class are very commonly used components. The rollers (shafts) are among the simplest machining objects. The framework technological processes of the parts of…
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The workpiece for piece production so far has been characterized by the simplicity of the design and at the same time the diversity and specific freedom of its development and manufacture. The production of a semi-finished product with complex shapes in the case of large-scale or mass production consisted in the use of such manufacturing…
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Machining parameters, including turning parameters (fig. 1), are a challenge for every technologist. The technological cutting parameters in the turning process include: cutting speed vc [m/min] (1) – D – diameter of the workpiece; n – rotational speed of the workpiece (main drive) (1) main drive speed n [obr/min]; independent minute machining feed rate f [mm/min]…
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Previous post in the series: Technology of the sleeve, part 5 – boring. Technological operation 50 – grinding Figure 1 shows a technological sketch for 50 technological operation – finished machining of a cylindrical outer surface (final geometric dimension). According to the principles of the technical drawing, very thick lines mean surfaces machined in a…
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Previous post from the series: Technological process of sleeve, part 3. Operation 30 – drilling Figure 1 shows a technological sketch for this technological operation – drilling through holes. According to the principles of the technical drawing, very thick lines mean surfaces machined in a given technological operation. Cut No.: Description of the technological…
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Previous post in the series: Technological process of sleeve, part 1. In the entry Sleeve – framework process – forging, a blank design is presented as forging. This project applies as part of the framework technological process discussed first, using conventional machine tools. The design of the blank as a forging can be developed as…
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Milling in relation to turning is characterized by much greater variation. The following are the basic descriptions and dependencies of the machining parameters related to milling. This is the first of a series of articles about machining parameters. This method is a machining in which the main rotary motion is made by a tool and…
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The blank (workpiece) in the form of a cast is economically justified in the case of series production (from 5,000 pieces). This article presents the basics of casting design in the context of further technological operations using mainly machining. The design of gray cast iron castings in sand molded by machine or by hand is…
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Previous post from the series: Technological process of sleeve, part 4 – drilling. Technological operation 40 – boring Figure 1 shows a technological sketch for the technological operation in question – boring a hole. According to the principles of the technical sketch, very thick lines mean surfaces machined in a given technological operation. Cut…
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Previous entry in the series: Technological process of sleeve, part 2 Operation 20 Figure 1 shows a technological sketch for this technological operation. According to the principles of technical drawing, very thick lines mean surfaces machined in a technological operation. Cut No.: Description of the technological cut: 1 Facing. 2 Turn Ø110,5-0,1 3 Chamfer…
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