The key technology of turning hole is to solve the problem of rigidity and chip removal of the inner hole turning tool.
To increase the rigidity of the inner hole turning tool, take the following measures:
Try to increase the cross-sectional area of the tool holder when machining the turning hole of stainless steel turning parts.
Usually, the tip of the inner hole turning tool is located on the upper side of the tool holder, so the cross-sectional area of the tool holder is less, less than 1/4 of the cross-sectional area of the hole. If the tip of the inner hole turning tool is located on the center line of the tool holder, the cross-sectional area of the tool holder in the hole can be greatly increased.
In order to control the cutting outflow direction, the rough turning tool requires the chips to flow to the surface to be machined. For this reason, an inner hole turning tool with a positive edge inclination is used.
When the stainless steel turned parts are subjected to fine turning, the chip flow is required to flow toward the center and move the chips forward (the hole center chip removal). Therefore, pay attention to the grinding direction of the cutting edge when sharpening the knife, and the chip removal method of tilting the arc toward the front edge.
A guard shaft must be made before processing. The main purpose of the shaft guard is to enclose the inner hole of the turned thin-wall sleeve in the original size, and fix it with the front and rear centers to process the outer circle without deformation, and to maintain the processing quality and accuracy of the outer circle. Therefore, the processing of the guard shaft is a key link in the process of processing thin-walled casings of stainless steel turning parts.