Solution to the deviation of drilling center position of machining center: 1. Before accurately marking and drilling, you should first be familiar with the requirements of the drawing and process the datum of the workpiece; the flatness of the general datum is ≤0.04mm, and the perpendicularity of the adjacent datum is ≤0.04mm. According to the size requirements of the drill hole, use a height ruler to draw the cross center line of the hole position, the line is required to be clear and accurate; the thinner the line, the higher the accuracy. Because the line of the marking line always has a certain width, and the general accuracy of the marking line can reach 0.25 ~ 0.5mm, the vernier caliper or steel ruler should be used for inspection after the line is drawn. 2. After the inspection grid or inspection circle is drawn and the inspection is passed, the inspection grid or inspection circle with the center line of the hole as the symmetry center should also be drawn as the inspection line during trial drilling to facilitate inspection during drilling With the positive drilling position, it is generally possible to draw several inspection squares or inspection circles of different sizes. The small inspection square or inspection circle is slightly larger than the drill bit transverse edge, and the larger inspection square or inspection circle is slightly larger than the drill diameter. 3. Proofing and eye drawing After drawing out the corresponding inspection grid or inspection circle, the proofing and eye drawing should be done carefully. Make a small point first and observe carefully in different directions of the center line of the cross to see if the sample punching eye hits the intersection of the center line of the cross. Finally, punch the sample punching eye hard and round it to make it accurate and centering. Drilling processing, drilling processing factory proofing punching eye has a little trick: the sample punch is tilted with the sample tip on one side of the center line of the cross to move slowly to the other side, when moving, when a certain point is blocked When feeling, stop moving the upright sample punch, and you will find that this point is the center of the cross centerline; at this time, the sample punching eye shot at this point is the center of the cross centerline, and you will find that the sample punch will always be on the cross centerline. There is a feeling of blockage in the center. 4. Clamp and wipe clean the machine table, fixture surface and workpiece reference surface to clamp the workpiece. The clamping is required to be smooth and reliable for easy observation and measurement. Pay attention to the clamping method of the workpiece to prevent the workpiece from being deformed by the clamping. 5. Trial drilling must be conducted before trial drilling: align the transverse edge of the drill bit with the center of the hole to drill a shallow pit, and then visually check whether the shallow pit is in the correct position, and continuously correct the deviation so that the shallow pit is the same as the inspection circle axis. If the deviation is small, the workpiece can be forced to move in the opposite direction of the deviation while drilling, to achieve gradual correction. If there is too much deviation, you can punch a few samples in the opposite direction of the deviation or make a few grooves with a chisel. The purpose of this is to reduce the cutting resistance of the part, so that the drill bit deviates during the cutting process and the drill bit is adjusted. The location of the center and the center of the hole. Test drilling to cut out the chiseled grooves, and then deepen the shallow pits until the shallow pits and the inspection grid or inspection circle coincide, and then drill the holes to achieve the purpose of correction.
The installation of the countertop basin is easy, as long as the hole is opened on the countertop. There are a variety of sink edge designs for over-counter basin sink styles to choose from. It is necessary to ensure that the connection gap between the sink and the countertop is uniform, and there is no water seepage.
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