How do Conventional Lathe reduce the wear and tear of car knives
Whether it is the Conventional Lathe or other lathe, it is the most serious of the lathe tool, in the premise of ensuring the processing precision, the car knife plays a very important role. First of all, we should pay attention to the maintenance of the lathe, and the effective maintenance is also one of the effective extension of the lathe.
During the operation, more common wear and tear, the workpiece is not fastened or the car knife wear too much. When the lathe tool is too high, when the knife to a certain depth, the back of the tool can support the workpiece, increase the friction, and even bend the workpiece, resulting in the phenomenon of nibbling. Too low, but not easy to expel. These are all factors that can lead to wear and tear.
Are turning back to force under the condition of normal direction is the workpiece center, plus a cross into the gap of lead screw and nut is too big, to keep turning back up to automatically tend to increase, thus the workpiece is raised, a lathe chew knives at this point, should be timely stop operation, the next step should timely adjust the height of cutting tool, the blade and the axis of the workpiece contour of knife trial cut method can also be used machining. In rough and semi-fine cars, the tip position of the blade is 1% higher than the center of the workpiece.
One of the most main is the workpiece clamping not firm, as a result of the artifact itself rigid cannot withstand cutting when the cutting force, thus produce excessive deflection, change the tool and workpiece center height (workpiece be inflated), formed turning spurt, appear on the knife, should put the workpiece clamping and firm at this time. Use the tail bracket to support the center, center, etc., to increase the rigidity of the workpiece. Tool wear and tear caused by excessive cutting force increases, support curved artifacts, these are the Conventional Lathe some operating phenomena often appear in the process of operation, effectively prevent the above can effectively decrease the wear degree of the turning tool.
Conventional Lathe accuracy control of first source comes from the operator, furthermore is to as for the overall performance of the lathe, so in the case of this article has the details of the operation, dynamic milling head clamping cylinder milling cutter and the use of end milling cutter for cutting and axial parts can be equal or not equal plane milling.
The rotation precision depends on the manufacturing, assembling and adjusting precision of main shaft, bearing and box of Conventional Lathe. The diameter of the shaft neck, the circular degree of bearing roller and roller, and the dynamic balance of the spindle and its rotating parts can cause the radial circle to jump. Bearing support ends, spindle shoulder and relevant parts face the vertical error of the main axis turning center line,
This part of the numerical control transformation, Y to the stepper motor input worm directly connected with dividing head, because of the dividing head ratio I = 1:40, so, Y to the stepper motor rotation 1 turn, drive the dividing head spindle rotation 1/40 turn, turn stepper motor turning 40 Y, will lead to dividing head spindle turn 1 turn.
Stiffness of the spindle assembly is refers to the ability to resist deformation under the action of loads, usually by a spindle front unit displacement of elastic deformation, the displacement direction defined imposed by force.
The stiffness of the spindle component is the comprehensive stiffness, which is a comprehensive reflection of the rigidity of the main shaft and bearing. As a result, the size and shape of the main shaft, bearing the type and amount of, preloaded and arrangement of configuration form, transmission parts, main shaft parts manufacturing and assembly quality and so on can affect the stiffness of the spindle components.