Search results

Scheme of ballizing process of tube: a) before and b) after burnishing broaching Methodology of science research The aims of burnishing process can be as follows: surface finish processing – predetermined reduction of surface irregularities after treatment prior to burnishing; strengthening processing – producing specific changes in the physical properties of the material in the surface layer of the object, causing it to be resistant to operational factors such as fatigue, wear, corrosion and others; dimension and surface finish treatment – a predetermined in-crease in dimensional accuracy, whilst reducing surface roughness to the required value.
Analyzing the data in Table 1 it can be concluded that the parameter Ra=0.46mm (average arithmetic roughness profile) has a very low value satisfactory after ballizing.
Data presented in the Figure 5 and Table 1 that is much lower average arithmetic roughness profile after burnishing.
On the basis of the data included in Table 1 and in Fig. 6 it is possible to conclude that a considerable improvement of surface adhesion took place after ballizing process, which was demonstrated by curves of the bearing area.

(1)Mandrel is the main part of the fixture, made of ductile iron, casting no obvious crack, surface processing after casting machining allowance should be 2-3 mm, weight reduction box spraying green paint, pay attention to the position of spindle right end A0 datum and positioning pin hole, and the unlabeled chamfer angle 1*45°.The dimensions as shown in figure 3;(2)Cylindrical pin (short positioning pin), materials for 45 # steel, parts size for Φ5-H7*11, chamfering 1*45°;(3) compression nut size for: M36-H7*31;(4) clamp cover material is nodular cast iron, casting no obvious crack, casting machining allowance for 2-3 mm, inner cavity after casting spraying green paint, unlabeled corner R5, unlabeled chamfer angle 1*45° , Φ7 air vent should be no special place on the surface of the cone, as shown in figure 2.
Let the Rub drum of center hole of Φ124mm correspond with cylindrical pin 4 and the small end face of the Rub drum correspond with the locating datum of 3, the small end face of the Rub drum Φ5mm correspond with the diamond pin of the fifth positioning pin hole of the fixture (As shown in Figure 4).In the milling procedure, the Rub a drum is rotating following the turntable with axes A, processing the features that distribute on the circumference.
Analysis by the six point location principle, the locating datum of 3 limits the workpiece’X axis has been moving a degree of freedom, the cylindrical pin 4 limits the workpiece’Z axis, Y axis has been moving two degrees of freedom, the large end face 7 of the cover limits the Z axis, Y axis has been rotating two degrees of freedom, joined with the short cylindrical pin 3 limits the workpiece’X axis has been rotating one degrees of freedom.
According to datum reference locating the parts, then let the end cap 7 support the parts of rub drum and the large end face 7 of end cover align to the inner hole of Rub a drum, let the nut 10 and washer 9 compress the small face 3 of end cover.
Fig. 4 The fixture body clamping device and part model 1-the supporting rod 2-four axis machining datum AO 3- plane locating datum 4 -cylindrical pin 5- dowel pin hole 6- the large end face clamping cover 7- the clamping cap circular cylinder 8- air escape 9-washer 10-nut 11-screw 12- parts of the positioning pin hole of Φ 5mm 13- rub a drum center hole of Φ 124mm 2.

(Material) Safety Data Sheets contain extensive information about the physical, chemical, and toxicological hazards of substances and products used in the workplace.
These tubes contain aggressive chemistry involving chromate reduction.
Statistical calculation was performed using IHDA-LE (Industrial Hygiene Data Analyst – Lite Edition, Version 1.25) published by Exposure Assessment Solutions, Inc., Morgantown, WV) Results and Discussion Table 1 provides results from spot sampling for methanol.
Lognormal distributions typically model industrial hygiene data [5].

For the organisation this means benefits in the form of financial savings, the documentation streamlining, better specification of responsibilities and powers, improvement of production processes and easier errors detection, the reduction of the number of occupational accidents and prevention of possible accidents, the guarantee of compliance with applicable legal regulations [3].
Results and Discussion The comparison of data in Table 2: Initial condition of the assessment and minimizing duplicate actions to data in Table 3: Proposed condition of duplicate actions assessment and minimizing process shows that the minimizing of duplicate - similar activities has occurred by means of application of the tool for minimizing the duplicate actions in the activities of safety, which was applied to the PS area issues.
Data from Table 3: Proposed condition of the duplicate actions assessment and minimizing process in the last step of application of the tool for minimizing duplicate actions in the activities of safety were converted into the form of catalogue sheets.

Based on these data, it was decided to create samples of products consisting of a surface layer based on wood flour, binder, modifier and inner or lower layer based on recycled thermoplastic polymer and sawdust
The presented data show that the cross-breaking strength of on average 18% higher is achieved with the formation of an internal layer based on PP.
Halitov, Modeling of a reduction zone of the gasifier installation, Materials Science and Engineering, 124, (2016) [4] D.V.
Luible, Investigations on ageing of wood-plastic composites for outdoor applications: A meta-analysis using empiric data derived from diverse weathering trials, Construction and Building Materials, 124 (2016) 1142-1152

Introduction Ever since error theory was developed, which is always used to assess the results of any experiements, but less people pay attention to those data that they got true or not, which is hard to accurately recognized because of the presence of errors.
Using least squares method, standard curve equation was made according to the measured data[6]: A = 0.00556 m +0.0216, the correlation coefficient r = 0.9961.
The uncertainty component introduced by standard curve fitting is the largest one of the uncertainty components, therefore, to control standard curve preparation and the curve fitting method of the ginsenoside measurement is the best way to reduce the degree of uncertainty components, and the reduction of this component has the most obvious effect to reduce the measurement uncertainty of this method.
In this study, the Class A and Class B standard uncertainty were evaluated by classification, and the Class A and Class B were combined into the standard uncertainty and expanded uncertainty, this study provide a reference for further improving the reliability and consistency of test data in the laboratory.

After developing all rules (rules for design constraints see fig.1, rules for selecting gear materials, rules for speed reduction, etc.), all this design knowledge can be adopted and captured as a knowledge database in the system.
After the reliability, maintainability, cost, initial gear tooth data have been calculated based on user-specked requirements, it is necessary to calculate the capacity of the gear sets.
A set of algorithms supplementing the FEA model would take the parameters, which define the geometry of the gear tooth together with data, which determines the mesh resolution and create a data file of nodal coordinates and element topologies in the format required by the analysis program.

Numerous methods have been developed for production of the Ni-P alloy coatings as vacuum deposition, chemical reduction also known as autocatalytic or electroless deposition, rapid quenching, melt spinning, vapor deposition, and electrodeposition.
The two-CPEs model was utilized for approximation of the ac impedance data [6-8].
As a result of approximation of the experimental data in the case of two-CPEs model the following parameters could be obtained: Rct1, T1, f1, Rct2, T2, f2, Rs, where Rct1 and Rct2 is charge transfer resistance related to high frequency (HF) and low frequency (LF) semicircle, respectively; T1 and T2 is capacitance parameter associated with HF and LF semicircle, respectively; and f1 and f2 is connected with HF and LF semicircle, respectively, and it takes the values £ 1 as a dimensionless exponent of the CPE related to the constant phase angle, a = 90°(1-f) (Tab. 2).
The EIS data were obtained on the Ni-P electrodes in the potential range corresponding to the linear part of the Tafel plots in which the steady-state conditions were ensured and kinetic parameters from the Tafel equation could be calculated (see Fig. 1 and Tab. 1).

Many non contact measurement techniques have been proposed to solve these problems: for example in [1] a set of optical fiber probes, fixed on the turbine stator is proposed, in [2] a laser Doppler vibrometer with a rotating measurement point by using two mirrors is illustrated, while in [3] a laser vibrometer with a fixed measurement point and special purpose data processing techniques is proposed.
Typically data processing by the lock-in technique is performed, combining the output signal from the infrared detector with a reference signal for dynamic loading.
The velocity of the motor is controlled by a small low voltage drive interfaced to a computer and using a data acquisition board and relative software the rotational speed of the mechanical component can be measured. .
The strong reduction of the wake effect is clear and it is possible to see stress concentrations around the holes.

Therefore, the mechanical properties within traditional macroscopic size do not properly be used, which imply that the impact will be increased while many of the traditional macroscopic size characteristics were neglected after size reduction.
According to those results, a reverse approach was used for checking its similar data to additionally establish a finite element simulation programs for the simulation of forming limit of sheet metal.
The experiment of micro curling process mainly made the curled geometry of specimen and measured the data of load and springback.
The load signal from loadcell and displacement signal from laser displacement sensor were captured by a data acquisition device to make a curve for expressing the relationship between the displacement and punch load.