What are the principles for handling precision machined parts?

2022 10/14

What are the principles for handling precision machined parts? What are the safety precautions when processing precision parts?CNC Lathe

1.Processing principles of precision machining

There are three specific processing principles for precision machining, as follows.

(1) In order to ensure machining accuracy, roughing and finishing are best carried out separately. Because rough machining, cutting volume, the workpiece is subject to cutting force, clamping force, more heat, as well as the processing surface has a more significant machining hardening phenomenon, there is a large internal stress inside the workpiece, if rough, rough machining is carried out continuously, the precision of the parts after finishing will be quickly lost because of the redistribution of stress. For some parts with high machining accuracy requirements. After roughing and before finishing, should also arrange low-temperature annealing or aging treatment process to eliminate internal stress.Sheet Metal

(2) reasonable choice of equipment. Roughing is mainly cut off most of the machining allowance, and does not require a high degree of machining accuracy, so roughing should be in the power, accuracy is not too high on the machine tool, finishing process requires a higher precision machine tool processing. Rough and finish machining in different machine tools, not only can give full play to the capacity of the equipment, but also to extend the service life of precision machine tools.

(3) in the precision machining process route, often arranged with heat treatment process. Heat treatment process location arrangements are as follows: to improve the cutting performance of metals, such as annealing, normalizing, tempering, etc., generally arranged in the precision machining before. To eliminate internal stress, such as aging treatment, tempering treatment, etc., generally arranged after roughing, before finishing. In order to improve the mechanical properties of the parts, such as carburizing, quenching, tempering, etc., generally arranged in the precision machining after. Such as heat treatment after a large deformation, but also must be arranged for the final processing process.


2, safety considerations in precision machining

(1) Easy to operate, reduce walking back and forth, and avoid unnecessary bending and tiptoeing movements.

(2) accurate and reliable positioning, to prevent the slightest vibration will produce a false movement.

(3) machine tool equipment, the direction of motion of the operating parts and the direction of movement of the operated parts to comply with the regulations, and a simple symbol mark.

(4) the installation of the necessary interlocking mechanism to prevent uncoordinated action of the operating parts, as well as uncoordinated accidents when operating multiple people.

(5) handle, hand wheel, button structure and arrangement position to comply with the provisions. Start button should be installed in the housing or equipped with a guard ring to prevent accidental touching. The handwheel and handle installed on the shaft bar will be injured when the knife is automatically fed with the rotation of the shaft, so an automatic disengagement device should be installed.