Runqia 850e850400 textured metal surface application

Overview of the first metal surface plating machine

In the fields of machinery, automobile, electronics, light industry and so on, a large number of molds and workpiece surfaces need to be roughened (i.e. uniformly dense pits with a certain depth are formed on the workpiece surface). This technology has been applied earlier in the automotive industry. At present, a large number of injection molded parts of household appliances and electronic devices sold on the market mostly adopt various beautiful The applicable pattern pattern (such as leather pattern, orange peel pattern, etc.) is also a kind of texturing pattern in a broad sense, and its surface texturing processing methods are summarized, which can be divided into (1) electrochemical and chemical methods; (2) Shot peening; (3) High energy beam irradiation; (4) The workpiece is roughened by electric discharge deposition.

Principle of the second metal surface plating machine

The working principle of runqia metal surface hardening machine: the voltage is added between the electrode and the workpiece after voltage transformation and rectification. Unlike the EDM machine tool, the electrode is not servo fed, and the workpiece does not need to be buried in the working fluid. Due to the action of the rotator, the workpiece and the electrode are in frequent contact, and the discharge capacitance is generated, which can control the energy of each discharge.

Third test conditions and test results

The experimental workpiece materials are 45 steel, H-13 and high-speed steel. The electrode materials are tungsten based cemented carbide electrode, titanium based cemented carbide electrode and reinforcing material. One of the quality indicators after texturing is to see whether the roughness value RA is uniform. In this experiment, the RA values at three positions of the textured surface under each process parameter are measured, the error of Ra value is calculated, and the micro geometry of the textured surface is printed. Metal surface hardening machine for experiment: cdm3000 model produced by runqia company.

The quality of textured surface can be evaluated by the uniformity of pit depth and the uniformity of distribution. The former is expressed by the "relative error value" of RA, and the latter can be displayed by the surface contour. According to the analysis of experimental data, when tungsten based cemented carbide electrode and titanium based cemented carbide electrode are used as materials to roughen 45 steel workpiece, the roughness value RA is large, and the highest RA = 3.0 μ m. However, other RA values are small, and different gears reflect different discharge currents and different discharge energy. Generally speaking, the discharge energy is large, and the Ra value is large, but sometimes there is no obvious law. Individual data or even the opposite shows that there are errors in moving speed, pressure and angle during manual operation. Nevertheless, the relative error of RA is still within 30%, Meet the quality requirements. From the surface profile curve, the changes of wave crest and wave trough are relatively stable and uniform, and there are few sharp points, which is very in line with the expected results of roughened steel plate

Fourth, roughening microhardness measurement

When the metal surface plating machine works, the working electrode moves towards the workpiece driven by the vibrator. When the gap is close to a certain distance, the air in the gap will be broken down and spark discharge will be generated. When the electrode continues to approach the workpiece, an instantaneous short-circuit current will be generated to continue heating there. Due to the appropriate pressure between the tool and the workpiece, the melted materials will bond with each other Diffusion, forming infiltration layer, resulting in material transfer and coverage. This is an important difference from EDM surface, that is, in addition to the texturing function, it also has the function of strengthening plating and hardening, so as to achieve the purpose of comprehensive machining. As the coating thickness of runqia metal surface hardening machine is thin (estimated to be within 0.10mm), it can only be measured by microhardness tester. The Vickers hardness of 45 steel before roughening is only HV = 386, and the microhardness is significantly improved after roughening and strengthening. Especially when tungsten based cemented carbide electrode is used, HV = 1300 ~ 1900, which can significantly improve the service life of the die. For general workpieces, the mechanical physical properties of the surface are changed and the effect of "external hardness and internal toughness" is achieved.

Chapter V product test application conclusion

It is a better process to roughen the workpiece by plating hard machine on the metal surface, which has the following characteristics;

1) The electrode can be used flexibly, and different electrode materials can be selected according to the requirements of the workpiece.

2) The operation is convenient. The workpiece does not need to be embedded in the working fluid, and the hand-held tool can roughen the parts that are difficult to reach by ordinary methods.

3) Less investment and low cost, suitable for small area surface texturing.

4) Roughening can not only meet the quality requirements, but also strengthen the workpiece, which has the technical effect of comprehensive processing.