Superfinishing surface quality influencing factors and control measures

Keywords: machinery and equipment parts surface quality control measures influencing factors
With the Superfinishing development of China's science and technology, to a large extent, promote the development of the machining industry, machining industry occupies a larger proportion of the market economy. Performance and service life of machinery and equipment, is an important criterion to measure the production levels of the corporate machinery, and the operating efficiency of the machinery and equipment by the influence of mechanical parts, if the quality does not meet the requirements of mechanical parts, when told running of the machinery and equipment, on will lead to lower efficiency equipment noise problem is serious, and even cause serious security incidents, therefore, to ensure the quality of the surface of the part, while the emphasis on the parts to use performance.

Analysis of factors that affect the surface quality of the parts
(A) production equipment factors
Mechanical parts in the production process, production equipment has a significant impact on the quality of products. In general, the production process of the mechanical parts need to go through the grinding process, the conduct of these production processes must be done by a professional production equipment support. However, due to the production equipment of the mechanical parts processing enterprises in China compared to the production line there is a big gap between the more developed countries, the production equipment backward production equipment accuracy and equipment productivity enough to affect the overall quality of the machine parts. For example, in the production process, the lack of stability of production equipment, there will be more substantial vibration problems in the production process of sanctification, so that the parts of the surface chatter marks, increases the surface roughness, thus deteriorating the quality of the machined surface. have serious quality problems.

(B) production of technical factors
Superfinishing parts processing, the production technology of choice, also determines the surface quality of mechanical parts. For example, under the same conditions, the carbide tool surface roughness of the machined parts to be significantly lower than the high-speed steel cutting tools, diamond, cubic boron nitride cutting tools production effect is more superior to carbide. However, in the actual production process, the production of parts of the material should be based on specific selection, otherwise, also the quality of the parts of the surface will have some impact. For example, the affinity of the diamond with iron-group material, making the processing of iron-group material parts are not suitable selection of diamond tools, or the production quality will be seriously affected. Meanwhile, in the production and processing of brittle material parts, the chips will appear in particulate form, if in the process of cutting swarf occurs problems such as chipping, causes parts of the surface more rough, and therefore, during the production before machining, must be considering the features and characteristics of the material, and to choose the production technology.

(3) other factors
In the process of mechanical equipment, will cause a certain impact on the quality of the surface of the mechanical parts, the main influencing factors including abrasion resistance, fatigue strength, and corrosion resistance, etc., if the mechanical parts of the property can not meet the conditions of use of the device and the construction environment, will be a serious impact on the life of the equipment and the use of mechanical effect. Therefore, in the actual production process, it must be comprehensive consideration of the relevant properties of machinery parts, machine machining surface quality and resistance, to ensure the normal operation of mechanical equipment.

Machining surface quality control measures
(A) to strengthen the introduction of advanced equipment
Add some product processing equipment, has a very large impact on the surface quality of the mechanical parts, therefore, strengthen the introduction of advanced production equipment, improve the overall performance of the production equipment, effective way to control the quality of the machined surface. With the continuous development of China's science and technology, the performance of production equipment and run effect gradually enhanced, therefore, must be to strengthen the machined surface quality control, to ensure that the use of machinery and equipment performance. Production business process, you should pay attention to the introduction and application of production equipment, improve the process parameters to reduce surface roughness to ensure the market competitiveness of the machinery and equipment.

(2) emphasize the machining method \
At present, it is possible to reduce the processing method of machining surface roughness ultra-precision cutting and ground roughness grinding method, and is responsible for the final step processing of ultra precision machining, grinding technology. Ultra-precision machining during mechanical parts processing, there are generally three forms of exercise, low-speed rotary movement of the workpiece, the grinding head axial movement as well as Whetstone three reciprocating vibration, three different running form, form is not repeated mechanical workpiece surface trajectory, to enhance the degree of smoothness of the surface of the workpiece. Ultra-precision machining process of cutting and grinding with grinding there is a big difference between the the rough workpiece production of ultra-precision machining, the workpiece surface wore off, the whole contact area will greatly increase the pressure also will swordsman, the workpiece will conjunction to form a layer of film between Whetstone Whetstone with the workpiece will not again be direct contact.
(C) improve the surface mechanical properties

Another method to improve the machining surface quality is reasonable improvement in the process, the physical and mechanical properties on the surface of the workpiece and to change the processing method, so as to achieve the purpose of increasing the surface quality of. Before conducting machining, we must first develop a reasonable processing process in order to guarantee the quality of the workpiece machining, the unloading surface quality processing to provide a reasonable scientific basis. In the process, you must select a reasonable cutting parameters reasonable cutting parameters is the suppression cutting BUE important factors can effectively reduce the residual processing area of ​​the height, to ensure that the workpiece surface smoothness of. Machining depth of cut and feed rate also has a direct impact on machining surface quality. Appropriate to reduce the main the declination and vice declination angle in the case of a certain amount of feed, and are able to effectively reduce the workpiece surface roughness. In addition, in the machining process, it is should be noted that to select the appropriate cutting fluid, to improve the coefficient of friction between the machining tool with the workpiece, effectively reduce the interaction between the temperature of the tool with the workpiece in the cutting work, so that the degree of wear of the workpiece to greatly reduce, to ensure the quality of the machined surface.
Summary:

Machined surface quality of the Superfinishing of the use of machinery and equipment and production efficiency has an important impact on machining surface quality problems, will result in greatly reduce the stability of the machinery and equipment, the use of performance greatly reduced, the noise problem is obvious, and even cause serious industrial accidents, therefore, must be emphasis on mechanical processing sectors, to take reasonable measures to improve the smoothness of the surface of the part to improve the effect of the use of parts. The same time, the actual production process, we must attach importance to the properties of the mechanical parts, such as the degree of abrasion resistance, corrosion resistance, fatigue resistance, for the use of the environment and conditions of use of the equipment, make full detection work to extend the use of mechanical products life, to ensure the healthy development of the machining industry.
Technology and the principle of Stress Detector voltage tester:http://steelprofileexport.blogspot.com/2012/12/technology-and-principle-of-stress.html