Aluminum Alloy Connecting Arm

The connecting arm is made of ultra-hard aluminum 7075-T6 and has an overall asymmetrical, double-layered L-shaped stacked structure. The main body is equipped with a number of parallel mounting openings (including sliding openings and transverse openings) for connecting the base or drive; One end is integrated into a circular bore that can be used with a clamp tree or a bearing to connect to a pivot joint; The other extreme extends a cantilever section with reinforced nerves, integrated with a long window that not only reduces weight, but also provides a fine elastic adjustment space, which is adapted to the connecting mechanisms that require a displacement compensation or a demand adjustment.

Step 1: Accurately saw and cut 7075 aluminum alloy sheet, cut the blank according to the outline, and then perform the equalization and stress relief treatment to eliminate rolling internal stress and avoid deformation and deformation after treatment.

Step 2: Start the CNC Milling equipment to rough mill the blank, quickly remove most of the excess, and mechanize the approximate shape of the connecting arm, the empty groove and the reversal of the reinforcement rib. Book a machining job with precision from 0.2 to 0.3 mm and backholes to prepare for the next precision machining.

Step 3: Semi-precision machining: replacement of the semi-precision machining tool, semi-precision milling at the key parts of the connecting arm, Correction of gross machining errors, optimization of the accuracy of the contour of the empty channel and the installation surface, further reduce machining allowance and simultaneous enlargement of the holes in each position, to ensure a uniform cut during rear precision machining.

Step 4: Using the High Precision CNC Milling technology, high precision CNC equipment and customized hard alloy cutting tools are used, to realize a precision milling integrated into the connecting arm, thereby resulting in the final formation of multi-pivot positioning openings, tree holes, Mounting surfaces and empty structures are completed in a single stroke. The coaxiality of the hole positions, the flatness of the coupling surfaces and the overall measurement tolerances are strictly controlled, to ensure seamless compatibility with the carrier components.

Step 5: Manually deburr and chamfer the processed connecting arm, and gently remove the aluminum scratches and oil stains by ultrasonic cleaning to clean the surface.

Step 6：First, use 120# sandblasting to evenly powder, remove knife marks and form a delicate matte texture, to improve the adhesion of the oxide layer; The orange anodizing is then carried out to produce a dense protective film made of aluminum oxide, which enhances the wear resistance, greatly improves corrosion resistance and radiation resistance and effectively extends service life.

Dongguan Shengpeng Precision Technology Co., Ltd., as a professional manufacturer of precision components, has a mature precision machining system and can provide a complete customer-specific precision milling services to meet customers' individual needs. We can customize the size specifications, the arrangement of the pivot and the empty structure of the connecting arm according to the transmission parameters of customer equipment. At the same time, we support the exchange of materials (adapted to various high-strength metal materials) and the regulation of the surface treatment process (such as sandblasting with different mesh sizes, anodizing with different colors, hard oxidation, etc.), the product design requirements are fully met.