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At present, the monotonous silver-white and brownish color cannot meet the needs of architects for a good coordination with the exterior wall decorative tiles and exterior wall latex. The new series of stainless steel color, champagne color, golden yellow, titanium gold, red (wine red, jujube red, black, purple) along with colored glass can enhance the decorative effect. These profiles must undergo chemical or mechanical polishing before being oxidized to achieve the best result.

CNC numerical control processing technology is a type of mechanical processing, and it also follows the cutting laws of mechanical processing, being largely similar to the processing techniques of ordinary machine tools. As it is an automated processing method that applies computer control technology to mechanical processing, it has the characteristics of high processing efficiency and high precision. Its processing technology has its own uniqueness, with a relatively complex process and a detailed and meticulous arrangement of work steps. 
The CNC numerical control processing technology involves the selection of tools, the determination of cutting parameters, and the design of the tool path route. The CNC numerical control processing technology is the foundation and core of numerical control programming. Only with a reasonable process can high-efficiency and high-quality numerical control programs be compiled. The criterion for evaluating the quality of a numerical control program is: shorter processing time, less tool wear, and the production of more effective workpieces. 

The main contents of correcting the processing molds for extruded aluminum profiles include: adjusting the proportion of metal flow distribution (such as adjusting the size of the分流 holes or guiding grooves in the molds, the depth of the electrochemical drainage grooves， etc.)； adjusting the contact friction coefficient， obstruction interception and other methods (such as base obstruction， etc.)； and adjusting the length of the working section of the mold holes in various ways to change the speed at which the metal flows out of the mold holes， so that the metal can flow out uniformly from the mold holes and produce qualified extruded products. Therefore， mold repair personnel must master the relevant inspection techniques proficiently in order to correctly analyze and judge the causes of product defects， and thus carry out effective mold corrections. 

The density of aluminum profiles is only 2.7 g/cm³, approximately 1/3 of the density of steel, copper, or brass (7.83 g/cm³, 8.93 g/cm³, respectively). Aluminum can exhibit excellent corrosion resistance under most environmental conditions, including air, water (or saltwater), petrochemical products, and many chemical systems.

In the filter devices used in grain machinery, grain cleaning machinery is a type of processing machine that is suitable for removing impurities, selecting grains, and grading grains. Next, the editor will introduce the aluminum devices used in grain machinery, their functions and working principles. 

Among the aluminum devices used in grain machinery, those that can separate based on density can be used to separate impurities that are similar in size and shape but have different weights, such as common metal lumps, mud clumps, stones, ceramics, and coal dust, etc. There are two main methods of separation: wet method and dry method. In the wet method, a typical aluminum device for grain machinery is the wheat washing and drying machine. 

The material of the bicycle frame tube has evolved from the early chromium-molybdenum steel to aluminum alloy, and then to the application of composite materials such as carbon fiber. Besides, there are scandium alloys, magnesium alloys, titanium alloys, etc. Manufacturers are constantly developing new material formulas to enhance the design capabilities of the tubes and structures. Density is one of the important factors determining the weight of the frame. The lower the density, the lighter the frame. Thus, it can be seen that the density of chromium-molybdenum steel is higher, while that of carbon fiber-reinforced materials is lower. However, the frame not only needs to consider weight, but also needs to consider tensile strength, elastic coefficient, etc. Therefore, even if the density is low but the strength is insufficient, it is not acceptable. So, let's take a look at the differences between different material bicycle frame tubes together! 

The components of a bicycle are designed and assembled with very clear purposes. The principles and detailed aspects related to them have become a subject of study. However, there are fixed standards that suit it perfectly. If it doesn't suit you, no matter how good the components are, they won't be able to perform their original functions. Let's take a look at the bicycle frame tubes and maintenance together!