What are the precautions for the CNC machining center?
The CNC machining center can process some precision parts.Whether it is the current electronic products or some precision mechanical components,there are many CNC machining processes.The processing quality of CNC machining is the survival path of the enterprise.Every mechanical worker must master the basic skills and some essentials.What are the precautions for the CNC machining center?
Tool and feed rate
Before starting to execute each program,all tools must be carefully and carefully checked to ensure that the tools match the tools specified in the programming instructions.At the beginning of processing,the feed rate should be minimized.The method of single-section execution,rapid positioning,and knife-cutting must be used.Attention should be paid when entering the knife,and the hand should be placed on the stop button.If the problem is found,it must be immediately stop.During the machining process,pay attention to the direction of the tool to ensure a safe feed,then slowly increase the feed rate until the appropriate value is reached,and add coolant or cold air to the tool and workpiece to reduce the cutting temperature.
Open roughing precautions
When roughing the workpiece,the position of the operator should not be too far from the control panel.This ensures that the machine can be shut down in time if it encounters an abnormal phenomenon.After the roughing,pull the table again to make sure that the workpiece is not loose.If there is any,the workpiece must be recalibrated and touched.In the process of processing,the processing parameters should be continuously optimized according to the processing conditions to achieve the best results.
Because roughing is a very critical process,after processing,the main dimension value should be measured and the drawing requirements are consistent.After self-inspection,it can be removed and must be sent to the inspector for special inspection.
Drilling processing precautions
Performing drilling on a machining center is a three-step process.First,the center hole must be used to position the hole,then drilled with a drill bit that is 0.5 to 2 mm smaller than the hole size of the drawing,and finally finished with a suitable bit.
Reaming processing precautions
Similar to drilling,the reaming of the workpiece is also divided into three steps.First,the hole is to be positioned with the center drill,and then drilled with a drill bit smaller than the aperture size of the drawing by 0.5 to 3 mm,and finally the reamer is used.Reaming.When reaming,be careful to control the spindle speed within 70 to 180 rpm,neither lower than the lower limit nor higher than the upper limit.
Boring processing considerations
The boring of the workpiece is divided into four steps.The first step is to locate with a center drill.The second step is to drill with a drill bit that is 1 to 2 mm smaller than the hole size of the drawing.The third step is to use a rough boring tool or a milling cutter.Machining to a machining allowance of only about 0.3 mm on one side,the last step is to use a precision boring tool with a pre-adjusted size for fine boring.The fine balance should not be less than 0.1 mm.
Direct CNC operation precautions
Before the CNC machining,the workpiece must be clamped,the zero position is set,and the machining parameters are set.Open the machining program check for the number processing in the computer,then let the computer enter the DNC state and enter the file name of the correct machining program.Next,press the“TAPE”button and the program start button on the machine.At this time,the machine controller will flash“LSK”.At this time,press the Enter keyboard on the computer to perform DNC pass processing.