Processing a ten-threaded comb

The CQA204 carding machine developed by our factory is an advanced textile machine. The bristle roller (Fig. 1) is an important part of the device. Its material is HT200 cast iron, the total length is 1387mm, the journal size at both ends is φ40_(+0.002)~(+0.08)mm, the thread length is 1013mm, it is 10 square thread, the thread diameter is φ242±0.2mm, lead 25.4mm, pitch 2.54mm, thread groove width 1.017_0~(+0.025)mm, groove depth 1.525±0.05mm, thread surface roughness R_01.6, thread groove bottom cylinder facing the A and B plane straightness 0.05mm. The size accuracy of the bristle roller is high and the processing is difficult. In order to solve the bristle roller thread in time

Venous Cannula

Venous cannula is also a deep venous puncture catheter. The method is to select the appropriate puncture site and insert the needle under the skin, and insert the needle with negative pressure until the dark red blood is absorbed, indicating that the needle has entered the vein, and the guide wire is inserted. Withdraw the puncture needle to leave the guide wire in the blood vessel, and then insert the venous catheter that needs to be indwelled along the guide wire, then exit the guide wire, inject diluted heparin saline and fix the catheter, the deep venous catheterization is completed. The veins for puncture and catheterization are usually selected clinically, including the subclavian vein, internal jugular vein, and femoral vein. After the puncture catheter is indwelled, attention must be paid to the care of the puncture site to avoid infection with thrombus or catheter falling off.

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