The polishing process of hardware accessories can be divided into two parts: polishing and polishing. The processes and methods of these two parts are summarized as follows:

Polishing: The main goal of polishing stainless steel welded parts is to remove solder joints and achieve a surface roughness of R10um for the workpiece, in preparation for polishing.

There are three processes in the polishing section: rough grinding, semi precision grinding, and precision grinding

The detailed instructions for polishing hardware accessories are as follows:

1. Visually inspect the workpieces that were transferred to the polishing process in the previous process, such as whether there are any missing welds, welding penetration, uneven depth of welding points, deviation from the joint too far, local depressions, uneven docking, whether there are deep scratches, bumps, serious deformations, and other defects that cannot be remedied in this process. If there are any of the above defects, they should be returned to the previous process for repair. If there are no aforementioned defects, proceed to this polishing process.

2. Rough grinding, using 600 # abrasive tape to grind the workpiece back and forth on the product. The goal of this process is to remove the welding points left by the workpiece welding and the bumps that occurred in the previous process, and to achieve the initial formation of the weld fillet. There are basically no large scratches or bumps on the horizontal and vertical surfaces. After this process, the surface roughness of the workpiece should reach R0.8mm. Pay attention to the inclination angle of the sanding machine and control the pressure of the sanding machine on the workpiece during the polishing process. Generally speaking, it is more appropriate to align with the surface being thrown in a straight line!

3. Semi precision grinding, using an 800 # abrasive belt to grind the product back and forth according to the previous method of grinding the workpiece, mainly involves correcting the seams that appeared in the previous process and further fine grinding the imprints generated after rough grinding. The imprints left by the previous process need to be repeatedly ground to achieve no scratches on the surface of the workpiece and basic brightness. The surface roughness of this process should reach R0.4mm. (Pay attention not to generate new scratches and bumps in this process, as such defects cannot be repaired in subsequent processes.)

4. The polishing and precision grinding of hardware accessories mainly involves correcting and grinding the small lines that appeared in the previous process using a 1000 # abrasive belt. The grinding method is the same as above. The goal of this process is to basically eliminate the seam between the grinding part and the ungrinded part of the workpiece, and further brighten the surface of the workpiece. The workpiece after grinding through this process should be basically close to the mirror effect, and the surface roughness of the workpiece should reach R0.1mm

5. Instructions for replacing abrasive belts: Generally speaking, 600 # abrasive belts can grind 6-8 1500mm long workpieces, 800 # abrasive belts can grind 4-6 workpieces, and 1000 # abrasive belts can grind 1-2 workpieces. The specific situation depends on the welding points of the workpiece, the pressure used for polishing, and the polishing method. In addition, it is also important to note that the replacement of the sand belt must ensure that the sand belt can rotate smoothly on the sponge wheel to achieve the goal of evenly grinding the workpiece.

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Dongguan Fuding Metal Co., Ltd

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