For CNC machining acrylic, the width of the chip groove should also be appropriate to the cutting depth. Otherwise, when the groove is too narrow, the chips appear wide and are not easy to curl in the groove. Often, the chips do not flow through the bottom of the groove and form banded chips.
When the groove is too wide, the chip is narrow, the flow is relatively free, the deformation is not sufficient, and it does not break. In order to obtain satisfactory chip breaking effect, the appropriate chip breaking groove width should be selected according to the specific processing conditions. For workpiece materials with low hardness, the groove should be narrower, on the contrary, the groove should be wider.
After assembly, the outer ring of the bearing should be in uniform contact with the end face of the bearing cover at the positioning end. After installation, the rolling bearing should rotate flexibly and stably by hand. The joint surface of the upper and lower bearing shells should be closely pasted and cannot be checked with a 0.05mm feeler gauge; When fixing the bearing bush with the locating pin, the reaming and pin allocation shall be carried out under the condition that the opening surface and end face of the bush are flush with the opening surface and end face of the relevant bearing hole. The pin shall not loosen after being driven. The accuracy requirements of shaft parts are relatively high, so the process requirements of shaft parts machining should also be more strict, so as to better ensure that the mechanical equipment can operate better and have a longer service life. Yuntuo machining focuses on the processing and manufacturing of large hardware parts, and undertakes precision mechanical parts processing, large-scale CNC gantry milling processing, frame welding processing, and horizontal CNC processing.
There are many surfaces required to be processed for the box, such as lathe head box, gear transmission box, etc. in these machined surfaces, the plane machining accuracy is easier than the hole machining accuracy, so the machining accuracy of the spindle hole (main hole) in the box and the hole system machining accuracy have become the key issues of the process. Therefore, I prefer to pay attention to several points in the arrangement of the process route. Machining the plane first not only removes the bumps and depressions on the surface of the blank and the sand inclusion on the surface, but also makes it convenient to scribe and align the holes distributed on the plane. Moreover, when the boring cutter starts boring, there will be no impact vibration and tool damage due to the uneven end face. Therefore, it is generally necessary to machine the plane first.
In the processing and production of non-standard precision mechanical parts in large machinery processing plants, although there are many small skills that are very inconspicuous, if you can know and master these small skills, you will get twice the result with half the effort! Remove the jaw of the vise and process two M4 threaded holes, flush the two 1.5mm thick steel plates with the jaw, rivet the 0.8mm thick hard brass plate with aluminum rivets, and fix it to the jaw with M4 countersunk screws to form a durable soft jaw. This can protect precision machinery parts from being damaged.
Precision parts processing plays an irreplaceable role in the development of new products. Generally speaking, parts with different degrees of complexity can be processed through programming, while the modification and renewal of design only need to change the program of the lathe, which can greatly shorten the product development cycle. The automation of precision parts processing is very sufficient, which greatly reduces the physical labor intensity of workers. Workers do not need to operate the whole process like ordinary lathes in the processing process, but mainly observe and supervise lathes. However, the technical content of the corresponding NC machining is higher than that of the ordinary lathe, so it requires higher mental labor than the ordinary lathe.
The adjustment principle of high-frequency power supply of wire cutting machine: the workpiece height is about 50mm, and the molybdenum wire diameter is about 0.16mm. When cutting, generally set the "voltage adjustment" knob to level 2, "pulse amplitude" switch to level 1+2+2, "pulse width selection" knob to level 3, "interval adjustment" knob to the middle position, and the cutting current is stable at about 2.0A. Selection of feeding speed (selected by the controller): after determining the voltage, amplitude, pulse width and interval, first select the short-circuit mode and determine the short-circuit current, then start cutting, and adjust the variable-frequency gear and tracking button of the controller to make the cutting current short-circuit. In the cutting process, the switching of each state should be carried out under the condition of high reversing or turning off frequency of the screw barrel, and the state should not be adjusted greatly at one time to avoid wire breakage. During the initial cutting of the new molybdenum wire, the processing current should be 1/3-2/3 of the normal cutting current, and the ten minute cutting time should be adjusted to the normal value to prolong the service time of the molybdenum wire.
Five axis linkage machining has the characteristics of high efficiency and high precision. The workpiece can be clamped once to complete complex machining. It can adapt to the processing of current molds such as auto parts and aircraft structural parts. There is a big difference between five axis machining center and pentahedral machining center. Many people don't know this and mistakenly regard the pentahedral machining center as a five axis linkage machining center. The five axis machining center has five axes x, y, Z, a and C. XYZ and AC axes form five axis machining. It is good at spatial surface machining, special-shaped machining, hollowed out machining, drilling, oblique hole, oblique cutting, etc. The "pentahedral machining center" is similar to the three-axis machining center, but it can make five faces at the same time, but it cannot do special-shaped machining, such as oblique drilling, cutting inclined planes, etc.
