Abstract: In the modern world, communications representing pipelines with various lengths, sections and axis shapes are widely used, for example, pipelines for supplying and discharging water, oil, gas, etc. The total length of pipelines is millions of kilometers, therefore, issues of efficient operation and services are relevant.
The main task to reduce environmental pollution and increase the profitability of oil fields is to extract unstable and stable hydrocarbons from associated petroleum gas. In this case, it is possible to obtain a liquid fraction, which can be transported by mobile transport.
The paper deals with the question of modeling of the drill mandrel with the shock absorber connected to the mandrel using a viscoelastic clutch. A mathematical model of drill mandrel vibration, machine support and inertia (damper) in the form of a differential equation system has been developed. The model is made in the form of a four-mass system of connected bodies. The solution of the system of differential equations was found using the finite difference method as well as the operator method using Laplace transform. As a result of the simulation, it was found that the use of a vibration damper can significantly reduce the amplitude of the natural vibration of the drill mandrel when pulsed, as well as significantly reduce the amplitude of the forced vibrations when subjected to periodic disturbing forces. The developed mathematical model and algorithms for numerical solution of differential equations allow us to select optimal parameters of the damping element of the well. The data obtained shall be used to create a prototype drill mandrel and to conduct field tests.
Takumi’s U series of 5-axis machining centers are consistently designed to meet mold and die requirements as well as enable fast and precise machining of workpieces with high surface quality.
Takumi’s U series of 5-axis machining centers are consistently designed to meet mold and die requirements as well as enable fast and precise machining of workpieces with high surface quality.
One of the outstanding features of Takumi’s compact U series is its pronounced mechanical and thermal stability. The U 400 and U 600 models have a portal design, whereas the U 800 features gantry construction. As a result, the machining centers are extremely robust and have a high level of structural rigidity, which in turn allows for highly precise and dynamic production.
The primary differences between the versions ─ in addition to their design ─ have to do with the sizes of their rotary tables as well as the maximum table loads. Moreover, the U 800 is driven on the A and C-axes by means of torque motors. What do all the designs have in common? The direct drive units feature high drive torque and powerful clamping torque. They are also virtually wear-free and therefore require very little maintenance. Included in the standard equipment of the U series are glass scales, an oil cooler for the spindle, and the internal coolant supply through the spindle assembly. This makes the spindle resistant to high temperatures during prolonged program operating times in addition to its already smooth running characteristics.
As is the case with all Takumi machines, the U series also features a Heidenhain control system that allows for programming in dialog and in parallel mode and also includes functions for free contour programming and ISO-NC programming.
About Takumi
Founded in 1988, Takumi Machinery Company Ltd. is a mechanical engineering company that is based, and operates, in Taiwan. The company develops and manufactures high-speed CNC portal machining centers, principally for tool-making and mold-making applications. All the components used in these machines originate from first class brand manufacturers and specialist suppliers. In July 2015, Takumi was acquired by HURCO, the American CNC machinery manufacturer.
Text/Foto: Takumi
Boehlerit, Austrian development pioneer for cutting materials made from carbide, is creating a strong impulse for the aluminium sector. At the EMO in Hanover, the Kapfenberg-based company presented two additions to its existing aluminium programme in the form of the BWN10M and the BCN10M, both of which explore new avenues in terms of grades, systems and indexable insert design. The new cutting material solutions BWN10M and BCN10M are manufactured for the premium segment, leveraging the wealth of experience held by Boehlerit and fulfilling the most stringent quality requirements. They are intended as high-end solutions for the milling of aluminium, aluminium alloys and non-ferrous metals.
Three face milling systems (ETAtec 45P, THETAtec 45N and ISO 45P) and four edge milling systems (BETAtec 90P Feed, DELTAtec 90P Feed, ISO 90P and ZETAtec 90N), result in an extended tool portfolio whose base body may be fitted with uncoated (Si content < 6%) or coated (Si content > 6%) indexable insert solutions.
The uncoated BWN10M grade is ideal for the processing of non-ferrous metals, aluminium and aluminium alloys (Si content < 6%). Thanks to the specially designed, positive indexable insert geometry, this grade has particularly soft cutting properties. Furthermore, built-up material on the cutting edge is prevented through the use of premium grades with a high level of wear resistance, paired with highly precise manufacturing technologies with regard to the sharpness and design of the cutting edge as well as optimised chipping properties.
