My name is Liu Jinping, and my hometown is Xiaochang, Hubei. Speaking of this watch repair business, I have also worked for 30 years, with a transitional episode in the middle. Finally, I chose this watch repair service industry. Okay, let's get down to business. Let me share with you the precautions and steps for manually connecting the pendulum shaft.
The first picture: it's a 7 120 balance wheel, and the lower tip is broken.
The second picture: First, I use a special balance spring shovel to remove the balance spring evenly, and then use a special balance spring to remove the disc. In these two movements, pay attention to the deformation of the balance spring inner pile and the disk nail on the big disk.
The third picture: clamp the balance balance balance wheel, smoothly grind off the broken pendulum tip on the oilstone, and grind off half of the pendulum shaft at the disc position to keep the bearing and balance wheel from deforming.
The fourth picture: The picture above shows the polished pendulum shaft and the pointed pendulum shaft. When selecting materials with sharp shafts, it is best to use the same model. If there is no same model, when making materials, it is necessary to see whether the thickness of the pointed bearing and the straight channel of the disk hole are appropriate based on the removed disk. If it is too thick to get in and too thin to swing back and forth after installation, it can also be said that it is a fault.
The fifth picture: First, choose the gripper, choose the gripper head with strong tightness, clamp the selected material, put a magnifying glass, and accurately calculate the length left by the bearing on the balance wheel. Now point out that the length of the bearing should be left. Generally speaking, they should be the sum of the length of the pendulum shaft.
Figure 6: This is a polished sharp shaft.
Figure 7: First, gently pick up the polished pointed bearing, find a suitable disc position on the iron pier, keep the disc nailed on the disc intact, and reduce worries. Then, put the pointed bearing into the hole of the disc, find a suitable pointed punch and knock it down gently. Then, put the balance wheel on it, find a suitable pointed punch and knock it down gently to let the balance wheel come down. The main function of this pendulum tip is to connect the pendulum wheel and dusty pendulum bearing with the disk as a sleeve.
After connecting the pendulum shaft, the next step is to calibrate the balance wheel. I'll take the spring out first, remove the fork clamp and clamp, then install the balance wheel and pendulum splint, and blow the balance wheel with a blow ball to see if it rotates. If not, the balance of the balance wheel. The faults that are easy to occur in this process are: the pendulum tip is too long and the balance wheel does not move. At this time, we can raise the pendulum splint to raise the overall balance, otherwise, The pendulum tip is too short, the gap is too large, and the balance wheel shakes. At this time, we can adjust it with the drill frame on the shock absorber. The structure of the drill frame is flat and convex, and the convex side faces downwards, so that the clearance of the balance wheel becomes smaller. Because when connecting the pendulum shaft, its length has been calculated, and the difference in length should not be big. This fine-tuning method should be able to achieve results. . The balance wheel is unbalanced and wobbly. At this time, it is necessary to use special tools to balance the balance wheel, or symmetrically balance the balance wheel on the iron pier to make it move smoothly. Note: the movable outer pile and the fast and slow needle of the pendulum clamp should not be rubbed on the balance wheel, and the fork pressure plate should not be rubbed on the bottom, so that the balance wheel can rotate smoothly between them.
After the balance wheel is calibrated, it enters the balance spring positioning, so I won't explain it in detail. Everyone will. After the positioning process is completed, when installing the hairspring, the pad under the punching platform should be selected to prevent the lower tip and the disc nail from being damaged, and the upper punch should also be selected. The punch with a hole in the center should be consistent with the inner pile of the hairspring. Just rush to the position. Then this procedure, precautions and adjustment methods are completed. Thank you!
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