The production process of the watch case

1. Design drawing

2. Processing
According to the drawings, the watch embryo factory makes the embryo (use the steel plate to extrude the rough watch shape)
The embryo is first opened by the oil machine, and the margin of the embryo is removed (usually 0.5mm margin is left)
After the oil machine is roughed, the CNC machine (automatic lathe) is finished, and the precise data is obtained according to the content of the drawing. Generally, the internal structure is directly and accurately in place (generally allow a tolerance range of 3-5c, 1c=0.01mm for a hair wire about 8c).
After that, the holes and ear holes are drilled by the drilling machine, and then returned to the oil machine to grind the upper and lower parts (they are left outside the final processing because they are afraid that the previous steps will bump into the outside). The processing technology of different watch case styles is also slightly different. Some small lathes and cnc equipment to use.

3. Mill grinding
The mill is the most important part of the entire watch case processing process, and it is good to do the standard data according to the standard grade of the case. It is enough to ensure that the internal structure is correct and reasonable, and the appearance polishing is all based on the craftsmanship of the mill.
Example of grinding steps
① The inner side of the light machine ear is ground and the front is ground, and the 220# sandpaper is used with the fan.
② Light machine to make a big body and a front, 220# sandpaper cloak to carry out
③ When the light machine is rough, the body is too small, the rough grass wheel is 220#, and the asbestos wheel is 320#, which is too small.
④ Optical machine to do thin body. Asbestos wheel 240# is operated by wiping yellow wax with grass turbine
⑤ Optical machine is used as the ear tip, and the bottom of the shot is flat. Use 220# sandpaper 600# sandpaper through the disc machine.
The above steps are all the steps of the light machine. The light machine is a department of the mill. It is mainly responsible for rough grinding first to ensure that the shading and other lines of the above processing steps are ground off, and then the mill performs steps such as wire drawing and polishing.
⑥ The mill opens the thick shell of the ear surface, the ear tip and the bottom of the ear. Operation: Motor is operated with hemp wheel + yellow wax, most of the mills are operated by motor
⑦ Mill grinding the inner round mouth of the ear, the inner round mouth of the ear, the round mouth of the big body, and the inside of the shell surface. Operation: hemp wheel + yellow wax operation
⑧ The mill sweeps the body, rough sweep + fine sweep. Operation: hemp wheel + yellow wax for rough sweeping, wind wheel + large white wax for fine sweeping
⑨ The mill refines the body. Operation: wire wheel + large white wax
⑩ The mill is finely ground. Operation: wire wheel + large white wax
⑪ Tridium sand, Tridium shell, Tridium shell ear bottom sand. Operation: 80# rubber grinding wheel for triton sand machine
⑫ The mill is thick and thin. Operation: wire wheel + small green wax
⑬ Grinding the ear sand in the mill. Operation: Paparazzi wheel + small red wax for tablet
⑭ Tridium shell, ear surface sand. Operation: Triadium sander with strand grinding wheel
⑮ Mill polished, thin and large. Operation: motor + small white wax
⑯ Tridium shadow sand. Operation: 220# sandpaper for the triton sand machine
⑰ Ultrasonic cleaning
⑱ When entering the shell inspection room, the quality requirements for the shell inspection are as follows: 1. The body should not have rough lines, flower lines, or collapse points; 2. The shell surface sand and bottom sand should not be chaotic, and the sand should be round and striped, and there should be no broken lines.
The various sanding waxes to which the watch case sanding wheel sets are applied are briefly explained below.
Grass Wheel 220#+ Yellow Wax
Asbestos Wheel 320#+White Oil Wax
Sandpaper 220#/600#+white oil wax
Hemp wheel + yellow wax
Reel + small white wax
Wind wheel + big white wax
White wire wheel + small green wax
White line wheel + small white wax
rubber grinding wheel
Paparazzi Wheel + Small Red Wax Various Polishing Waxes

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